1 ----------------------------------------
2 05 April 2019. Summary of changes for version 20190405:
5 1) ACPICA kernel-resident subsystem:
7 Event Manager: History: Commit 18996f2db918 ("ACPICA: Events: Stop
8 unconditionally clearing ACPI IRQs during suspend/resume") was added
9 earlier to stop clearing of event status bits unconditionally on suspend
10 and resume paths. Though this change fixed an issue on suspend path, it
11 introduced regressions on several resume paths. In the case of S0ix,
12 events are enabled as part of device suspend path. If status bits for the
13 events are set when they are enabled, it could result in premature wake
14 from S0ix. If status is cleared for any event that is being enabled so
15 that any stale events are cleared out. In case of S0ix, events are
16 enabled as part of device suspend path. If status bits for the events are
17 set when they are enabled, it could result in premature wake from S0ix.
19 This change ensures that status is cleared for any event that is being
20 enabled so that any stale events are cleared out.
23 2) iASL Compiler/Disassembler and ACPICA tools:
25 iASL: Implemented an enhanced multiple file compilation that combines
26 named objects from all input files to a single namespace. With this
27 feature, any unresolved external declarations as well as duplicate named
28 object declarations can be detected during compilation rather than
29 generating errors much later at runtime. The following commands are
30 examples that utilize this feature:
31 iasl dsdt.asl ssdt.asl
32 iasl dsdt.asl ssdt1.asl ssdt2.asl
33 iasl dsdt.asl ssdt*.asl
35 ----------------------------------------
36 29 March 2019. Summary of changes for version 20190329:
39 1) ACPICA kernel-resident subsystem:
41 Namespace support: Remove the address nodes from global list after method
42 termination. The global address list contains pointers to namespace nodes
43 that represent Operation Regions. This change properly removes Operation
44 Region namespace nodes that are declared dynamically during method
47 Linux: Use a different debug default than ACPICA. There was a divergence
48 between Linux and the ACPICA codebases. In order to resolve this
49 divergence, Linux now declares its own debug default in aclinux.h
51 Renamed some internal macros to improve code understanding and
52 maintenance. The macros below all operate on single 4-character ACPI
53 NameSegs, not generic strings (old -> new):
54 ACPI_NAME_SIZE -> ACPI_NAMESEG_SIZE
55 ACPI_COMPARE_NAME -> ACPI_COMPARE_NAMESEG
56 ACPI_MOVE_NAME -> ACPI_COPY_NAMESEG
58 Fix for missing comma in array declaration for the AcpiGbl_GenericNotify
61 Test suite: Update makefiles, add PCC operation region support
64 2) iASL Compiler/Disassembler and Tools:
66 iASL: Implemented additional illegal forward reference detection. Now
67 detect and emit an error upon detection of a forward reference from a
68 Field to an Operation Region. This will fail at runtime if allowed to
71 AcpiExec: Add an address list check for dynamic Operation Regions. This
72 feature performs a sanity test for each node the global address list.
73 This is done in order to ensure that all dynamic operation regions are
74 properly removed from the global address list and no dangling pointers
77 Disassembler: Improved generation of resource pathnames. This change
78 improves the code that generates resource descriptor and resource tag
79 pathnames. The original code used a bunch of str* C library functions
80 that caused warnings on some compilers.
82 iASL: Removed some uses of strncpy and replaced with memmove. The strncpy
83 function can overwrite buffers if the calling code is not very careful.
84 In the case of generating a module/table header, use of memmove is a
85 better implementation.
88 3) Status of new features that have not been completed at this time:
90 iASL: Implementing an enhanced multiple file compilation into a single
91 namespace feature (Status): This feature will be released soon, and
92 allows multiple ASL files to be compiled into the same single namespace.
93 By doing so, any unresolved external declarations as well as duplicate
94 named object declarations can be detected during compilation (rather than
95 later during runtime). The following commands are examples that utilize
97 iasl dsdt.asl ssdt.asl
98 iasl dsdt.asl ssdt1.asl ssdt2.asl
99 iasl dsdt.asl ssdt*.asl
101 ASL tutorial status: Feedback is being gathered internally and the
102 current plan is to publish this tutorial on the ACPICA website after a
103 final review by a tech writer.
105 ----------------------------------------
106 15 February 2019. Summary of changes for version 20190215:
109 0) Support for ACPI specification version 6.3:
111 Add PCC operation region support for the AML interpreter. This adds PCC
112 operation region support in the AML interpreter and a default handler for
113 acpiexec. The change also renames the PCC region address space keyword to
116 Support for new predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG.
117 These methods provide OSPM with health information and device boot
120 PDTT: Add TriggerOrder to the PCC Identifier structure. The field value
121 defines if the trigger needs to be invoked by OSPM before or at the end
122 of kernel crash dump processing/handling operation.
124 SRAT: Add Generic Affinity Structure subtable. This subtable in the SRAT
125 is used for describing devices such as heterogeneous processors,
126 accelerators, GPUs, and IO devices with integrated compute or DMA
129 MADT: Add support for statistical profiling in GICC. Statistical
130 profiling extension (SPE) is an architecture-specific feature for ARM.
132 MADT: Add online capable flag. If this bit is set, system hardware
133 supports enabling this processor during OS runtime.
135 New Error Disconnect Recover Notification value. There are a number of
136 scenarios where system Firmware in collaboration with hardware may
137 disconnect one or more devices from the rest of the system for purposes
138 of error containment. Firmware can use this new notification value to
139 alert OSPM of such a removal.
141 PPTT: New additional fields in Processor Structure Flags. These flags
142 provide more information about processor topology.
144 NFIT/Disassembler: Change a field name from "Address Range" to "Region
147 HMAT updates: make several existing fields to be reserved as well as
148 rename subtable 0 to "memory proximity domain attributes".
150 GTDT: Add support for new GTDT Revision 3. This revision adds information
153 iASL: Update the HMAT example template for new fields.
155 iASL: Add support for the new revision of the GTDT (Rev 3).
158 1) ACPICA kernel-resident subsystem:
160 AML Parser: fix the main AML parse loop to correctly skip erroneous
161 extended opcodes. AML opcodes come in two lengths: 1-byte opcodes and 2-
162 byte extended opcodes. If an error occurs during an AML table load, the
163 AML parser will continue loading the table by skipping the offending
164 opcode. This implements a "load table at any cost" philosophy.
167 2) iASL Compiler/Disassembler and Tools:
169 iASL: Add checks for illegal object references, such as a reference
170 outside of method to an object within a method. Such an object is only
173 iASL: Emit error for creation of a zero-length operation region. Such a
174 region is rather pointless. If encountered, a runtime error is also
175 implemented in the interpeter.
177 Debugger: Fix a possible fault with the "test objects" command.
179 iASL: Makefile: support parent directory filenames containing embedded
182 iASL: Update the TPM2 template to revision 4.
184 iASL: Add the ability to report specific warnings or remarks as errors.
186 Disassembler: Disassemble OEMx tables as actual AML byte code.
187 Previously, these tables were treated as "unknown table".
189 iASL: Add definition and disassembly for TPM2 revision 3.
191 iASL: Add support for TPM2 rev 3 compilation.
194 ----------------------------------------
195 08 January 2019. Summary of changes for version 20190108:
198 1) ACPICA kernel-resident subsystem:
200 Updated all copyrights to 2019. This affects all source code modules.
203 2) iASL Compiler/Disassembler and Tools:
205 ASL test suite (ASLTS): Updated all copyrights to 2019.
207 Tools: Updated all signon copyrights to 2019.
209 AcpiExec: Added a new option to dump extra information concerning any
210 memory leaks detected by the internal object/cache tracking mechanism. -
213 iASL: Updated the table template for the TPM2 table to the newest version
214 of the table (Revision 4)
217 ----------------------------------------
218 13 December 2018. Summary of changes for version 20181213:
221 1) ACPICA Kernel-resident Subsystem:
223 Fixed some buffer length issues with the GenericSerialBus, related to two
224 of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes,
225 which are rarely seen in the field. For these, the LEN field of the ASL
226 buffer is now ignored. Hans de Goede
228 Implemented a new object evaluation trace mechanism for control methods
229 and data objects. This includes nested control methods. It is
230 particularly useful for examining the ACPI execution during system
231 initialization since the output is relatively terse. The flag below
232 enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
233 #define ACPI_LV_EVALUATION 0x00080000
236 Enter evaluation : _SB.PCI0._INI (Method)
237 Exit evaluation : _SB.PCI0._INI
238 Enter evaluation : _OSI (Method)
239 Exit evaluation : _OSI
240 Enter evaluation : _SB.PCI0.TEST (Method)
241 Nested method call : _SB.PCI0.NST1
242 Exit nested method : _SB.PCI0.NST1
243 Exit evaluation : _SB.PCI0.TEST
245 Added two recently-defined _OSI strings. See
246 https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
251 Update for buffer-to-string conversions via the ToHexString ASL operator.
252 A "0x" is now prepended to each of the hex values in the output string.
253 This provides compatibility with other ACPI implementations. The ACPI
254 specification is somewhat vague on this issue.
255 Example output string after conversion:
256 "0x01,0x02,0x03,0x04,0x05,0x06"
258 Return a run-time error for TermArg expressions within individual package
259 elements. Although this is technically supported by the ASL grammar,
260 other ACPI implementations do not support this either. Also, this fixes a
261 fault if this type of construct is ever encountered (it never has been).
264 2) iASL Compiler/Disassembler and Tools:
266 iASL: Implemented a new compile option (-ww) that will promote individual
267 warnings and remarks to errors. This is intended to enhance the firmware
270 AcpiExec: Implemented a new command-line option (-eo) to support the new
271 object evaluation trace mechanism described above.
273 Disassembler: Added support to disassemble OEMx tables as AML/ASL tables
274 instead of a "unknown table" message.
276 AcpiHelp: Improved support for the "special" predefined names such as
277 _Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be
278 used for "xx" and "x".
280 ----------------------------------------
281 31 October 2018. Summary of changes for version 20181031:
284 An Operation Region regression was fixed by properly adding address
285 ranges to a global list during initialization. This allows OS to
286 accurately check for overlapping regions between native devices (such as
287 PCI) and Operation regions as well as checking for region conflicts
288 between two Operation Regions.
290 Added support for the 2-byte extended opcodes in the code/feature that
291 attempts to continue parsing during the table load phase. Skip parsing
292 Device declarations (and other extended opcodes) when an error occurs
293 during parsing. Previously, only single-byte opcodes were supported.
295 Cleanup: Simplified the module-level code support by eliminating a
296 useless global variable (AcpiGbl_GroupModuleLeveCode).
299 2) iASL Compiler/Disassembler and Tools:
301 iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE
302 could cause a fault in the preprocessor. This was an inadvertent side-
303 effect from moving more allocations/frees to the local cache/memory
306 iASL: Enhanced error detection by validating that all NameSeg elements
307 within a NamePatch actually exist. The previous behavior was spotty at
308 best, and such errors could be improperly ignored at compiler time (never
309 at runtime, however. There are two new error messages, as shown in the
312 dsdt.asl 33: CreateByteField (TTTT.BXXX, 1, CBF1)
313 Error 6161 - ^ One or more objects within
314 the Pathname do not exist (TTTT.BXXX)
316 dsdt.asl 34: CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
317 Error 6160 - One or more prefix Scopes do not exist ^
320 iASL: Disassembler/table-compiler: Added support for the static data
321 table TPM2 revision 3 (an older version of TPM2). The support has been
322 added for the compiler and the disassembler.
324 Fixed compilation of DOS format data table file on Unix/Linux systems.
325 iASL now properly detects line continuations (\) for DOS format data
326 table definition language files on when executing on Unix/Linux.
328 ----------------------------------------
329 03 October 2018. Summary of changes for version 20181003:
332 2) iASL Compiler/Disassembler and Tools:
334 Fixed a regression introduced in version 20180927 that could cause the
335 compiler to fault, especially with NamePaths containing one or more
336 carats (^). Such as: ^^_SB_PCI0
338 Added a new remark for the Sleep() operator when the sleep time operand
339 is larger than one second. This is a very long time for the ASL/BIOS code
340 and may not be what was intended by the ASL writer.
342 ----------------------------------------
343 27 September 2018. Summary of changes for version 20180927:
346 1) ACPICA kernel-resident subsystem:
348 Updated the GPE support to clear the status of all ACPI events when
349 entering any/all sleep states in order to avoid premature wakeups. In
350 theory, this may cause some wakeup events to be missed, but the
351 likelihood of this is small. This change restores the original behavior
352 of the ACPICA code in order to fix a regression seen from the previous
353 "Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
354 This regression could cause some systems to incorrectly wake immediately.
356 Updated the execution of the _REG methods during initialization and
357 namespace loading to bring the behavior into closer conformance to the
358 ACPI specification and other ACPI implementations:
360 From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
361 "Control methods must assume all operation regions are inaccessible
362 until the _REG(RegionSpace, 1) method is executed"
364 "The exceptions to this rule are:
365 1. OSPM must guarantee that the following operation regions are always
367 SystemIO operation regions.
368 SystemMemory operation regions when accessing memory returned by the
369 System Address Map reporting interfaces."
371 Since the state of both the SystemIO and SystemMemory address spaces are
372 defined by the specification to never change, this ACPICA change ensures
373 that now _REG is never called on them. This solves some problems seen in
374 the field and provides compatibility with other ACPI implementations. An
375 update to the upcoming new version of the ACPI specification will help
376 clarify this behavior.
378 Updated the implementation of support for the Generic Serial Bus. For the
379 "bidirectional" protocols, the internal implementation now automatically
380 creates a return data buffer of the maximum size (255). This handles the
381 worst-case for data that is returned from the serial bus handler, and
382 fixes some problems seen in the field. This new buffer is directly
383 returned to the ASL. As such, there is no true "bidirectional" buffer,
384 which matches the ACPI specification. This is the reason for the "double
385 store" seen in the example ASL code in the specification, shown below:
387 Word Process Call (AttribProcessCall):
388 OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
389 Field(TOP1, BufferAcc, NoLock, Preserve)
391 FLD1, 8, // Virtual register at command value 1.
394 Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
396 CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
398 Store(0x5416, DATA) // Save 0x5416 into the data buffer
399 Store(Store(BUFF, FLD1), BUFF) // Invoke a write/read Process Call
401 // This is the "double store". The write to
402 // FLD1 returns a new buffer, which is stored
403 // back into BUFF with the second Store.
406 2) iASL Compiler/Disassembler and Tools:
408 iASL: Implemented detection of extraneous/redundant uses of the Offset()
409 operator within a Field Unit list. A remark is now issued for these. For
410 example, the first two of the Offset() operators below are extraneous.
411 Because both the compiler and the interpreter track the offsets
412 automatically, these Offsets simply refer to the current offset and are
413 unnecessary. Note, when optimization is enabled, the iASL compiler will
414 in fact remove the redundant Offset operators and will not emit any AML
417 OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
420 Offset (0), // Never needed
422 Offset (4), // Redundant, offset is already 4 (bytes)
424 Offset (64), // OK use of Offset.
427 dsdt.asl 14: Offset (0),
428 Remark 2158 - ^ Unnecessary/redundant use of Offset
431 dsdt.asl 16: Offset (4),
432 Remark 2158 - ^ Unnecessary/redundant use of Offset
435 ----------------------------------------
436 10 August 2018. Summary of changes for version 20180810:
439 1) ACPICA kernel-resident subsystem:
441 Initial ACPI table loading: Attempt to continue loading ACPI tables
442 regardless of malformed AML. Since migrating table initialization to the
443 new module-level code support, the AML interpreter rejected tables upon
444 any ACPI error encountered during table load. This is a problem because
445 non-serious ACPI errors during table load do not necessarily mean that
446 the entire definition block (DSDT or SSDT) is invalid. This change
447 improves the table loading by ignoring some types of errors that can be
448 generated by incorrect AML. This can range from object type errors, scope
449 errors, and index errors.
451 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
452 during suspend/resume. The status of ACPI events is no longer cleared
453 when entering the ACPI S5 system state (power off) which caused some
454 systems to power up immediately after turning off power in certain
455 situations. This was a functional regression. It was fixed by clearing
456 the status of all ACPI events again when entering S5 (for system-wide
457 suspend or hibernation the clearing of the status of all events is not
458 desirable, as it might cause the kernel to miss wakeup events sometimes).
462 2) iASL Compiler/Disassembler and Tools:
464 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
465 elements listed in the initialization file were previously initialized
466 after the table load and before executing module-level code blocks.
467 Recent changes in the module-level code support means that the table load
468 becomes a large control method execution. If fields are used within
469 module-level code and we are executing with the -fi option, the
470 initialization values were used to initialize the namespace object(s)
471 only after the table was finished loading. This change Provides an early
472 initialization of objects specified in the initialization file so that
473 field unit values are populated during the table load (not after the
476 AcpiExec: Fixed a small memory leak regression that could result in
477 warnings during exit of the utility. These warnings were similar to
479 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
480 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
482 ----------------------------------------
483 29 June 2018. Summary of changes for version 20180629:
486 1) iASL Compiler/Disassembler and Tools:
488 iASL: Fixed a regression related to the use of the ASL External
489 statement. Error checking for the use of the External() statement has
490 been relaxed. Previously, a restriction on the use of External meant that
491 the referenced named object was required to be defined in a different
492 table (an SSDT). Thus it would be an error to declare an object as an
493 external and then define the same named object in the same table. For
495 DefinitionBlock (...)
498 Device (DEV1){...} // This was an error
500 However, this behavior has caused regressions in some existing ASL code,
501 because there is code that depends on named objects and externals (with
502 the same name) being declared in the same table. This change will allow
503 the ASL code above to compile without errors or warnings.
505 iASL: Implemented ASL language extensions for four operators to make some
506 of their arguments optional instead of required:
507 1) Field (RegionName, AccessType, LockRule, UpdateRule)
508 2) BankField (RegionName, BankName, BankValue,
509 AccessType, LockRule, UpdateRule)
510 3) IndexField (IndexName, DataName,
511 AccessType, LockRule, UpdateRule)
512 For the Field operators above, the AccessType, LockRule, and UpdateRule
513 are now optional arguments. The default values are:
517 4) Mutex (MutexName, SyncLevel)
518 For this operator, the SyncLevel argument is now optional. This argument
519 is rarely used in any meaningful way by ASL code, and thus it makes sense
520 to make it optional. The default value is:
523 iASL: Attempted use of the ASL Unload() operator now results in the
525 "Unload is not supported by all operating systems"
526 This is in fact very true, and the Unload operator may be completely
527 deprecated in the near future.
529 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
530 file. Recent changes in the ACPICA module-level code support altered the
531 table load/initialization sequence . This means that the table load has
532 become a large method execution of the table itself. If Operation Region
533 Fields are used within any module-level code and the -fi option was
534 specified, the initialization values were populated only after the table
535 had completely finished loading (and thus the module-level code had
536 already been executed). This change moves the initialization of objects
537 listed in the initialization file to before the table is executed as a
538 method. Field unit values are now initialized before the table execution
541 ----------------------------------------
542 31 May 2018. Summary of changes for version 20180531:
545 1) ACPICA kernel-resident Subsystem:
547 Implemented additional support to help ensure that a DSDT or SSDT is
548 fully loaded even if errors are incurred during the load. The majority of
549 the problems that are seen is the failure of individual AML operators
550 that occur during execution of any module-level code (MLC) existing in
551 the table. This support adds a mechanism to abort the current ASL
552 statement (AML opcode), emit an error message, and to simply move on to
553 the next opcode -- instead of aborting the entire table load. This is
554 different than the execution of a control method where the entire method
555 is aborted upon any error. The goal is to perform a very "best effort" to
556 load the ACPI tables. The most common MLC errors that have been seen in
557 the field are direct references to unresolved ASL/AML symbols (referenced
558 directly without the use of the CondRefOf operator to validate the
559 symbol). This new ACPICA behavior is now compatible with other ACPI
562 Interpreter: The Unload AML operator is no longer supported for the
563 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
564 1) A correct implementation on at least some hosts may not be possible.
565 2) Other ACPI implementations do not correctly/fully support it.
566 3) It requires host device driver support which is not known to exist.
567 (To properly support namespace unload out from underneath.)
568 4) This AML operator has never been seen in the field.
570 Parser: Added a debug option to dump AML parse sub-trees as they are
571 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
574 Debugger: Reduced the verbosity for errors incurred during table load and
575 module-level code execution.
577 Completed an investigation into adding a namespace node "owner list"
578 instead of the current "owner ID" associated with namespace nodes. This
579 list would link together all nodes that are owned by an individual
580 control method. The purpose would be to enhance control method execution
581 by speeding up cleanup during method exit (all namespace nodes created by
582 a method are deleted upon method termination.) Currently, the entire
583 namespace must be searched for matching owner IDs if (and only if) the
584 method creates named objects outside of the local scope. However, by far
585 the most common case is that methods create objects locally, not outside
586 the method scope. There is already an ACPICA optimization in place that
587 only searches the entire namespace in the rare case of a method creating
588 objects elsewhere in the namespace. Therefore, it is felt that the
589 overhead of adding an additional pointer to each namespace node to
590 implement the owner list makes this feature unnecessary.
593 2) iASL Compiler/Disassembler and Tools:
595 iASL, Disassembler, and Template generator: Implemented support for
596 Revision D of the IORT table. Adds a new subtable that is used to specify
597 SMMUv3 PMCGs. rmurphy-arm.
599 Disassembler: Restored correct table header validation for the "special"
600 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
601 table header and must be special-cased. This was a regression that has
602 been present for apparently a long time.
604 AcpiExec: Reduced verbosity of the local exception handler implemented
605 within acpiexec. This handler is invoked by ACPICA upon any exceptions
606 generated during control method execution. A new option was added: -vh
607 restores the original verbosity level if desired.
609 AcpiExec: Changed the default base from decimal to hex for the -x option
610 (set debug level). This simplifies the use of this option and matches the
611 behavior of the corresponding iASL -x option.
613 AcpiExec: Restored a force-exit on multiple control-c (sigint)
614 interrupts. This allows program termination even if other issues cause
615 the control-c to fail.
617 ASL test suite (ASLTS): Added tests for the recently implemented package
618 element resolution mechanism that allows forward references to named
619 objects from individual package elements (this mechanism provides
620 compatibility with other ACPI implementations.)
623 ----------------------------------------
624 8 May 2018. Summary of changes for version 20180508:
627 1) ACPICA kernel-resident subsystem:
629 Completed the new (recently deployed) package resolution mechanism for
630 the Load and LoadTable ASL/AML operators. This fixes a regression that
631 was introduced in version 20180209 that could result in an
632 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
633 (SSDT) that contains package objects.
636 2) iASL Compiler/Disassembler and Tools:
638 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
639 1 MB. This change allows for table offsets within the acpidump file to be
640 up to 8 characters. These changes are backwards compatible with existing
644 ----------------------------------------
645 27 April 2018. Summary of changes for version 20180427:
648 1) ACPICA kernel-resident subsystem:
650 Debugger: Added support for Package objects in the "Test Objects"
651 command. This command walks the entire namespace and evaluates all named
652 data objects (Integers, Strings, Buffers, and now Packages).
654 Improved error messages for the namespace root node. Originally, the root
655 was referred to by the confusing string "\___". This has been replaced by
656 "Namespace Root" for clarification.
658 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
659 Ian King <colin.king@canonical.com>.
662 2) iASL Compiler/Disassembler and Tools:
664 iASL: Implemented support to detect and flag illegal forward references.
665 For compatibility with other ACPI implementations, these references are
666 now illegal at the root level of the DSDT or SSDTs. Forward references
667 have always been illegal within control methods. This change should not
668 affect existing ASL/AML code because of the fact that these references
669 have always been illegal in the other ACPI implementation.
671 iASL: Added error messages for the case where a table OEM ID and OEM
672 TABLE ID strings are longer than the ACPI-defined length. Previously,
673 these strings were simply silently truncated.
675 iASL: Enhanced the -tc option (which creates an AML hex file in C,
676 suitable for import into a firmware project):
677 1) Create a unique name for the table, to simplify use of multiple
679 2) Add a protection #ifdef in the file, similar to a .h header file.
680 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
683 AcpiExec: Added a new option, -df, to disable the local fault handler.
684 This is useful during debugging, where it may be desired to drop into a
687 ----------------------------------------
688 13 March 2018. Summary of changes for version 20180313:
691 1) ACPICA kernel-resident subsystem:
693 Implemented various improvements to the GPE support:
695 1) Dispatch all active GPEs at initialization time so that no GPEs are
697 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
698 before devices are enumerated.
699 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
701 4) Add parallel GPE handling to eliminate the possibility of dispatching
703 5) Dispatch any pending GPEs after enabling for the first time.
705 AcpiGetObjectInfo - removed support for the _STA method. This was causing
706 problems on some platforms.
708 Added a new _OSI string, "Windows 2017.2".
710 Cleaned up and simplified the module-level code support. These changes
711 are in preparation for the eventual removal of the legacy MLC support
712 (deferred execution), replaced by the new MLC architecture which executes
713 the MLC as a table is loaded (DSDT/SSDTs).
715 Changed a compile-time option to a runtime option. Changes the option to
716 ignore ACPI table load-time package resolution errors into a runtime
717 option. Used only for platforms that generate many AE_NOT_FOUND errors
718 during boot. AcpiGbl_IgnorePackageResolutionErrors.
720 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
721 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
722 compilation errors from unused variables (seen with some compilers).
725 2) iASL Compiler/Disassembler and Tools:
727 ASLTS: parallelized execution in order to achieve an (approximately) 2X
728 performance increase.
730 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
733 ----------------------------------------
734 09 February 2018. Summary of changes for version 20180209:
737 1) ACPICA kernel-resident subsystem:
739 Completed the final integration of the recent changes to Package Object
740 handling and the module-level AML code support. This allows forward
741 references from individual package elements when the package object is
742 declared from within module-level code blocks. Provides compatibility
743 with other ACPI implementations.
745 The new architecture for the AML module-level code has been completed and
746 is now the default for the ACPICA code. This new architecture executes
747 the module-level code in-line as the ACPI table is loaded/parsed instead
748 of the previous architecture which deferred this code until after the
749 table was fully loaded. This solves some ASL code ordering issues and
750 provides compatibility with other ACPI implementations. At this time,
751 there is an option to fallback to the earlier architecture, but this
752 support is deprecated and is planned to be completely removed later this
755 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
756 resolution of named reference elements within Package objects. Although
757 this is potentially a serious problem, it can generate a lot of
758 noise/errors on platforms whose firmware carries around a bunch of unused
759 Package objects. To disable these errors, define
760 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
761 errors are always reported for ACPICA applications such as AcpiExec.
763 Fixed a regression related to the explicit type-conversion AML operators
764 (ToXXXX). The regression was introduced early in 2017 but was not seen
765 until recently because these operators are not fully supported by other
766 ACPI implementations and are thus rarely used by firmware developers. The
767 operators are defined by the ACPI specification to not implement the
768 "implicit result object conversion". The regression incorrectly
769 introduced this object conversion for the following explicit conversion
780 2) iASL Compiler/Disassembler and Tools:
782 iASL: Fixed a problem with the compiler constant folding feature as
783 related to the ToXXXX explicit conversion operators. These operators do
784 not support the "implicit result object conversion" by definition. Thus,
785 ASL expressions that use these operators cannot be folded to a simple
786 Store operator because Store implements the implicit conversion. This
787 change uses the CopyObject operator for the ToXXXX operator folding
788 instead. CopyObject is defined to not implement implicit result
789 conversions and is thus appropriate for folding the ToXXXX operators.
791 iASL: Changed the severity of an error condition to a simple warning for
792 the case where a symbol is declared both locally and as an external
793 symbol. This accommodates existing ASL code.
795 AcpiExec: The -ep option to enable the new architecture for module-level
796 code has been removed. It is replaced by the -dp option which instead has
797 the opposite effect: it disables the new architecture (the default) and
798 enables the legacy architecture. When the legacy code is removed in the
799 future, the -dp option will be removed also.
801 ----------------------------------------
802 05 January 2018. Summary of changes for version 20180105:
805 1) ACPICA kernel-resident subsystem:
807 Updated all copyrights to 2018. This affects all source code modules.
809 Fixed a possible build error caused by an unresolved reference to the
810 AcpiUtSafeStrncpy function.
812 Removed NULL pointer arithmetic in the various pointer manipulation
813 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
814 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
816 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
820 2) iASL Compiler/Disassembler and Tools:
822 ASLTS: Updated all copyrights to 2018.
824 Tools: Updated all signon copyrights to 2018.
826 AcpiXtract: Fixed a regression related to ACPI table signatures where the
827 signature was truncated to 3 characters (instead of 4).
829 AcpiExec: Restore the original terminal mode after the use of the -v and
832 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
834 ----------------------------------------
835 14 December 2017. Summary of changes for version 20171214:
838 1) ACPICA kernel-resident subsystem:
840 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
841 interface where the optional "pathname" argument had inadvertently become
842 a required argument returning an error if omitted (NULL pointer
845 Fixed two possible memory leaks related to the recently developed "late
846 resolution" of reference objects within ASL Package Object definitions.
848 Added two recently defined _OSI strings: "Windows 2016" and "Windows
849 2017". Mario Limonciello.
851 Implemented and deployed a safer version of the C library function
852 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
853 creation of unterminated strings as a possible result of a standard
856 Cleaned up and restructured the global variable file (acglobal.h). There
857 are many changes, but no functional changes.
860 2) iASL Compiler/Disassembler and Tools:
862 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
863 optional OemData field at the end of the table was incorrectly required
864 for proper compilation. It is now correctly an optional field.
866 ASLTS: The entire suite was converted from standard ASL to the ASL+
867 language, using the ASL-to-ASL+ converter which is integrated into the
868 iASL compiler. A binary compare of all output files has verified the
869 correctness of the conversion.
871 iASL: Fixed the source code build for platforms where "char" is unsigned.
872 This affected the iASL lexer only. Jung-uk Kim.
874 ----------------------------------------
875 10 November 2017. Summary of changes for version 20171110:
878 1) ACPICA kernel-resident subsystem:
880 This release implements full support for ACPI 6.2A:
881 NFIT - Added a new subtable, "Platform Capabilities Structure"
882 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
883 errata release of the specification.
885 Other ACPI table changes:
886 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
887 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
890 Utilities: Modified the string/integer conversion functions to use
891 internal 64-bit divide support instead of a native divide. On 32-bit
892 platforms, a 64-bit divide typically requires a library function which
893 may not be present in the build (kernel or otherwise).
895 Implemented a targeted error message for timeouts returned from the
896 Embedded Controller device driver. This is seen frequently enough to
897 special-case an AE_TIME returned from an EC operation region access:
898 "Timeout from EC hardware or EC device driver"
900 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
901 runtime error messages have the identical prefix.
904 2) iASL Compiler/Disassembler and Tools:
906 AcpiXtract: Fixed a problem with table header detection within the
907 acpidump file. Processing a table could be ended early if a 0x40 (@)
908 appears in the original binary table, resulting in the @ symbol appearing
909 in the decoded ASCII field at the end of the acpidump text line. The
910 symbol caused acpixtract to incorrectly think it had reached the end of
911 the current table and the beginning of a new table.
913 AcpiXtract: Added an option (-f) to ignore some errors during table
914 extraction. This initial implementation ignores non-ASCII and non-
915 printable characters found in the acpidump text file.
917 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
918 for ASLTS. This feature is used to track memory allocations from
919 different memory caches within the ACPICA code. At the end of an ASLTS
920 run, these memory statistics are recorded and stored in a log file.
922 Debugger (user-space version): Implemented a simple "Background" command.
923 Creates a new thread to execute a control method in the background, while
924 control returns to the debugger prompt to allow additional commands.
925 Syntax: Background <Namepath> [Arguments]
927 ----------------------------------------
928 29 September 2017. Summary of changes for version 20170929:
931 1) ACPICA kernel-resident subsystem:
933 Redesigned and implemented an improved ASL While() loop timeout
934 mechanism. This mechanism is used to prevent infinite loops in the kernel
935 AML interpreter caused by either non-responsive hardware or incorrect AML
936 code. The new implementation uses AcpiOsGetTimer instead of a simple
937 maximum loop count, and is thus more accurate and constant across
938 different machines. The default timeout is currently 30 seconds, but this
939 may be adjusted later.
941 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
942 better reflect the new implementation of the loop timeout mechanism.
944 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
945 and to fix an off-by-one error. Jung-uk Kim.
947 Fixed an EFI build problem by updating the makefiles to for a new file
948 that was added, utstrsuppt.c
951 2) iASL Compiler/Disassembler and Tools:
953 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
954 includes support in the table disassembler, compiler, and template
957 iASL: Added an exception for an illegal type of recursive method
958 invocation. If a method creates named objects, the first recursive call
959 will fail at runtime. This change adds an error detection at compile time
960 to catch the problem up front. Note: Marking such a method as
961 "serialized" will not help with this problem, because the same thread can
962 acquire the method mutex more than once. Example compiler and runtime
972 Error 6152 - ^ Illegal recursive call to method
973 that creates named objects (MTH1)
975 Previous runtime exception:
976 ACPI Error: [INT1] Namespace lookup failure,
977 AE_ALREADY_EXISTS (20170831/dswload2-465)
979 iASL: Updated support for External() opcodes to improve namespace
980 management and error detection. These changes are related to issues seen
981 with multiple-segment namespace pathnames within External declarations,
984 External(\_SB.PCI0.GFX0, DeviceObj)
985 External(\_SB.PCI0.GFX0.ALSI)
987 iASL: Implemented support for multi-line error/warning messages. This
988 enables more detailed and helpful error messages as below, from the
989 initial deployment for the duplicate names error:
991 DSDT.iiii 1692: Device(PEG2) {
992 Error 6074 - ^ Name already exists in scope
995 Original name creation/declaration below:
996 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
998 AcpiXtract: Added additional flexibility to support differing input hex
999 dump formats. Specifically, hex dumps that contain partial disassembly
1000 and/or comments within the ACPI table data definition. There exist some
1001 dump utilities seen in the field that create this type of hex dump (such
1002 as Simics). For example:
1004 DSDT @ 0xdfffd0c0 (10999 bytes)
1012 Creator_id 1280593481
1013 Creator_revision 537399345
1014 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
1016 2af0: 5f 4c 30 46 00 a4 01
1018 Test suite: Miscellaneous changes/fixes:
1019 More cleanup and simplification of makefiles
1020 Continue compilation of test cases after a compile failure
1021 Do not perform binary compare unless both files actually exist
1023 iASL: Performed some code/module restructuring. Moved all memory
1024 allocation functions to new modules. Two new files, aslallocate.c and
1027 ----------------------------------------
1028 31 August 2017. Summary of changes for version 20170831:
1031 1) ACPICA kernel-resident subsystem:
1033 Implemented internal support for full 64-bit addresses that appear in all
1034 Generic Address Structure (GAS) structures. Previously, only the lower 32
1035 bits were used. Affects the use of GAS structures in the FADT and other
1036 tables, as well as the GAS structures passed to the AcpiRead and
1037 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
1039 Added header support for the PDTT ACPI table (Processor Debug Trigger
1040 Table). Full support in the iASL Data Table Compiler and disassembler is
1044 2) iASL Compiler/Disassembler and Tools:
1046 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
1047 Properties Topology Table) where a flag bit was specified in the wrong
1048 bit position ("Line Size Valid", bit 6).
1050 iASL: Implemented support for Octal integer constants as defined by the
1051 ASL language grammar, per the ACPI specification. Any integer constant
1052 that starts with a zero is an octal constant. For example,
1053 Store (037777, Local0) /* Octal constant */
1054 Store (0x3FFF, Local0) /* Hex equivalent */
1055 Store (16383, Local0) /* Decimal equivalent */
1057 iASL: Improved overflow detection for 64-bit string conversions during
1058 compilation of integer constants. "Overflow" in this case means a string
1059 that represents an integer that is too large to fit into a 64-bit value.
1060 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
1061 the low-order 32 bits with a warning, as previously implemented. Several
1062 new exceptions are defined that indicate a 64-bit overflow, as well as
1063 the base (radix) that was used during the attempted conversion. Examples:
1064 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
1065 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
1066 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
1068 iASL: Added a warning for the case where a ResourceTemplate is declared
1069 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
1070 this case, the resulting template is created with a single END_TAG
1071 descriptor, which is essentially useless.
1073 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
1074 include compilation error codes as well.
1076 ----------------------------------------
1077 28 July 2017. Summary of changes for version 20170728:
1080 1) ACPICA kernel-resident subsystem:
1082 Fixed a regression seen with small resource descriptors that could cause
1083 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
1085 AML interpreter: Implemented a new feature that allows forward references
1086 from individual named references within package objects that are
1087 contained within blocks of "module-level code". This provides
1088 compatibility with other ACPI implementations and supports existing
1089 firmware that depends on this feature. Example:
1092 If (ABCD) /* An If() at module-level */
1094 Name (PKG1, Package()
1096 INT1 /* Forward reference to object INT1
1102 AML Interpreter: Fixed a problem with the Alias() operator where aliases
1103 to some ASL objects were not handled properly. Objects affected are:
1104 Mutex, Event, and OperationRegion.
1106 AML Debugger: Enhanced to properly handle AML Alias objects. These
1107 objects have one level of indirection which was not fully supported by
1110 Table Manager: Added support to detect and ignore duplicate SSDTs within
1111 the XSDT/RSDT. This error in the XSDT has been seen in the field.
1113 EFI and EDK2 support:
1114 Enabled /WX flag for MSVC builds
1115 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
1116 Added local support for 64-bit multiply and shift operations
1117 Added support to compile acpidump.efi on Windows
1118 Added OSL function stubs for interfaces not used under EFI
1120 Added additional support for the _DMA predefined name. _DMA returns a
1121 buffer containing a resource template. This change add support within the
1122 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
1123 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
1126 2) iASL Compiler/Disassembler and Tools:
1128 iASL: Fixed a problem where the internal input line buffer(s) could
1129 overflow if there are very long lines in the input ASL source code file.
1130 Implemented buffer management that automatically increases the size of
1131 the buffers as necessary.
1133 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
1134 errors. If the specified exception is not raised during compilation, the
1135 compiler emits an error. This is intended to support the ASL test suite,
1136 but may be useful in other contexts.
1138 iASL: Implemented a new predefined macro, __METHOD__, which returns a
1139 string containing the name of the current control method that is being
1142 iASL: Implemented debugger and table compiler support for the SDEI ACPI
1143 table (Software Delegated Exception Interface). James Morse
1144 <james.morse@arm.com>
1146 Unix/Linux makefiles: Added an option to disable compile optimizations.
1147 The disable occurs when the NOOPT flag is set to TRUE.
1148 theracermaster@gmail.com
1150 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
1151 when there are different tables for 32-bit versus 64-bit.
1153 Enhanced error reporting for the ASL test suite (ASLTS) by removing
1154 unnecessary/verbose text, and emit the actual line number where an error
1155 has occurred. These changes are intended to improve the usefulness of the
1158 ----------------------------------------
1159 29 June 2017. Summary of changes for version 20170629:
1162 1) ACPICA kernel-resident subsystem:
1164 Tables: Implemented a deferred ACPI table verification. This is useful
1165 for operating systems where the tables cannot be verified in the early
1166 initialization stage due to early memory mapping limitations on some
1167 architectures. Lv Zheng.
1169 Tables: Removed the signature validation for dynamically loaded tables.
1170 Provides compatibility with other ACPI implementations. Previously, only
1171 SSDT tables were allowed, as per the ACPI specification. Now, any table
1172 signature can be used via the Load() operator. Lv Zheng.
1174 Tables: Fixed several mutex issues that could cause errors during table
1175 acquisition. Lv Zheng.
1177 Tables: Fixed a problem where an ACPI warning could be generated if a
1178 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
1180 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
1181 AcpiPutTable interfaces. This applies to the "late stage" table loading
1182 when the use of AcpiPutTable is no longer required (since the system
1183 memory manager is fully running and available). Lv Zheng.
1185 Fixed/Reverted a regression during processing of resource descriptors
1186 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
1187 exception in this case.
1189 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
1190 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
1192 Interpreter: Fixed a possible fault if an Alias operator with an invalid
1193 or duplicate target is encountered during Alias creation in
1194 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
1196 Added an option to use designated initializers for function pointers.
1197 Kees Cook <keescook@google.com>
1200 2) iASL Compiler/Disassembler and Tools:
1202 iASL: Allow compilation of External declarations with target pathnames
1203 that refer to existing named objects within the table. Erik Schmauss.
1205 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
1206 FieldUnit name also is declared via External in the same table. Erik
1209 iASL: Allow existing scope names within pathnames used in External
1210 statements. For example:
1211 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
1214 iASL: IORT ACPI table: Implemented changes required to decode the new
1215 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
1216 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
1218 Disassembler: Don't abort disassembly on errors from External()
1219 statements. Erik Schmauss.
1221 Disassembler: fixed a possible fault when one of the Create*Field
1222 operators references a Resource Template. ACPICA Bugzilla 1396.
1224 iASL: In the source code, resolved some naming inconsistences across the
1225 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
1226 Adds a new file, aslparseop.c
1228 ----------------------------------------
1229 31 May 2017. Summary of changes for version 20170531:
1232 0) ACPI 6.2 support:
1234 The ACPI specification version 6.2 has been released and is available at
1235 http://uefi.org/specifications
1237 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
1238 are summarized below.
1240 New ACPI tables (Table Compiler/Disassembler/Templates):
1241 HMAT (Heterogeneous Memory Attributes Table)
1242 WSMT (Windows SMM Security Mitigation Table)
1243 PPTT (Processor Properties Topology Table)
1245 New subtables for existing ACPI tables:
1246 HEST (New subtable, Arch-deferred machine check)
1247 SRAT (New subtable, Arch-specific affinity structure)
1248 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
1250 Simple updates for existing ACPI tables:
1251 BGRT (two new flag bits)
1252 HEST (New bit defined for several subtables, GHES_ASSIST)
1254 New Resource Descriptors and Resource macros (Compiler/Disassembler):
1260 New type for hardware error notification (section 18.3.2.9)
1262 New predefined names/methods (Compiler/Interpreter):
1263 _HMA (Heterogeneous Memory Attributes)
1264 _LSI (Label Storage Information)
1265 _LSR (Label Storage Read)
1266 _LSW (Label Storage Write)
1268 ASL grammar/macro changes (Compiler):
1269 For() ASL macro, implemented with the AML while operator
1270 Extensions to Concatenate operator
1271 Support for multiple definition blocks in same ASL file
1272 Clarification for Buffer operator
1273 Allow executable AML code underneath all scopes (Devices, etc.)
1274 Clarification/change for the _OSI return value
1275 ASL grammar update for reference operators
1276 Allow a zero-length string for AML filename in DefinitionBlock
1279 New device object notification value
1280 Remove a notify value (0x0C) for graceful shutdown
1281 New UUIDs for processor/cache properties and
1282 physical package property
1283 New _HID, ACPI0014 (Wireless Power Calibration Device)
1286 1) ACPICA kernel-resident subsystem:
1288 Added support to disable ACPI events on hardware-reduced platforms.
1289 Eliminates error messages of the form "Could not enable fixed event". Lv
1292 Fixed a problem using Device/Thermal objects with the ObjectType and
1293 DerefOf ASL operators. This support had not been fully/properly
1296 Fixed a problem where if a Buffer object containing a resource template
1297 was longer than the actual resource template, an error was generated --
1298 even though the AML is legal. This case has been seen in the field.
1300 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
1301 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
1303 Added header file changes for the TPM2 ACPI table. Update to new version
1304 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
1306 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
1307 These interfaces are intended to be used only in conjunction with the
1308 predefined _DLM method (Device Lock Method). "This object appears in a
1309 device scope when AML access to the device must be synchronized with the
1312 Example Code and Data Size: These are the sizes for the OS-independent
1313 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1314 debug version of the code includes the debug output trace mechanism and
1315 has a much larger code and data size.
1318 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
1319 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
1321 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1322 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1325 2) iASL Compiler/Disassembler and Tools:
1327 iASL: Fixed a problem where an External() declaration could not refer to
1328 a Field Unit. Erik Schmauss.
1330 Disassembler: Improved support for the Switch/Case operators. This
1331 feature will disassemble AML code back to the original Switch operators
1332 when possible, instead of an If..Else sequence. David Box
1334 iASL and disassembler: Improved the handling of multiple extraneous
1335 parentheses for both ASL input and disassembled ASL output.
1337 Improved the behavior of the iASL compiler and disassembler to detect
1338 improper use of external declarations
1340 Disassembler: Now aborts immediately upon detection of an unknown AML
1341 opcode. The AML parser has no real way to recover from this, and can
1342 result in the creation of an ill-formed parse tree that causes errors
1343 later during the disassembly.
1345 All tools: Fixed a problem where the Unix application OSL did not handle
1346 control-c correctly. For example, a control-c could incorrectly wake the
1349 AcpiExec: Improved the Control-C handling and added a handler for
1350 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
1353 Reduced the verbosity of the generic unix makefiles. Previously, each
1354 compilation displayed the full set of compiler options. This has been
1355 eliminated as the options are easily inspected within the makefiles. Each
1356 compilation now results in a single line of output.
1358 ----------------------------------------
1359 03 March 2017. Summary of changes for version 20170303:
1362 0) ACPICA licensing:
1364 The licensing information at the start of each source code module has
1365 been updated. In addition to the Intel license, the dual GPLv2/BSD
1366 license has been added for completeness. Now, a single version of the
1367 source code should be suitable for all ACPICA customers. This is the
1368 major change for this release since it affects all source code modules.
1371 1) ACPICA kernel-resident subsystem:
1373 Fixed two issues with the common asltypes.h header that could cause
1374 problems in some environments: (Kim Jung-uk)
1375 Removed typedef for YY_BUFFER_STATE ?
1376 Fixes an error with earlier versions of Flex.
1377 Removed use of FILE typedef (which is only defined in stdio.h)
1380 2) iASL Compiler/Disassembler and Tools:
1382 Disassembler: fixed a regression introduced in 20170224. A fix for a
1383 memory leak related to resource descriptor tags (names) could fault when
1384 the disassembler was generated with 64-bit compilers.
1386 The ASLTS test suite has been updated to implement a new testing
1387 architecture. During generation of the suite from ASL source, both the
1388 ASL and ASL+ compilers are now validated, as well as the disassembler
1389 itself (Erik Schmauss). The architecture executes as follows:
1391 For every ASL source module:
1392 Compile (legacy ASL compilation)
1393 Disassemble the resulting AML to ASL+ source code
1394 Compile the new ASL+ module
1395 Perform a binary compare on the legacy AML and the new ASL+ AML
1396 The ASLTS suite then executes normally using the AML binaries.
1398 ----------------------------------------
1399 24 February 2017. Summary of changes for version 20170224:
1402 1) ACPICA kernel-resident subsystem:
1404 Interpreter: Fixed two issues with the control method return value auto-
1405 repair feature, where an attempt to double-delete an internal object
1406 could result in an ACPICA warning (for _CID repair and others). No fault
1407 occurs, however, because the attempted deletion (actually a release to an
1408 internal cache) is detected and ignored via object poisoning.
1410 Debugger: Fixed an AML interpreter mutex issue during the single stepping
1411 of control methods. If certain debugger commands are executed during
1412 stepping, a mutex acquire/release error could occur. Lv Zheng.
1414 Fixed some issues generating ACPICA with the Intel C compiler by
1415 restoring the original behavior and compiler-specific include file in
1418 Example Code and Data Size: These are the sizes for the OS-independent
1419 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1420 debug version of the code includes the debug output trace mechanism and
1421 has a much larger code and data size.
1424 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1425 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1427 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1428 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1431 2) iASL Compiler/Disassembler and Tools:
1433 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
1434 tool has been designed, implemented, and included in this release. The
1435 key feature of this utility is that the original comments within the
1436 input ASL file are preserved during the conversion process, and included
1437 within the converted ASL+ file -- thus creating a transparent conversion
1438 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
1440 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
1443 iASL/Disassembler: Improved the detection and correct disassembly of
1444 Switch/Case operators. This feature detects sequences of if/elseif/else
1445 operators that originated from ASL Switch/Case/Default operators and
1446 emits the original operators. David Box.
1448 iASL: Improved the IORT ACPI table support in the following areas. Lv
1450 Clear MappingOffset if the MappingCount is zero.
1451 Fix the disassembly of the SMMU GSU interrupt offset.
1452 Update the template file for the IORT table.
1454 Disassembler: Enhanced the detection and disassembly of resource
1455 template/descriptor within a Buffer object. An EndTag descriptor is now
1456 required to have a zero second byte, since all known ASL compilers emit
1457 this. This helps eliminate incorrect decisions when a buffer is
1458 disassembled (false positives on resource templates).
1460 ----------------------------------------
1461 19 January 2017. Summary of changes for version 20170119:
1464 1) General ACPICA software:
1466 Entire source code base: Added the 2017 copyright to all source code
1467 legal/licensing module headers and utility/tool signons. This includes
1468 the standard Linux dual-license header. This affects virtually every file
1469 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
1470 the ACPICA test suite.
1473 2) iASL Compiler/Disassembler and Tools:
1475 iASL: Removed/fixed an inadvertent remark when a method argument
1476 containing a reference is used as a target operand within the method (and
1477 never used as a simple argument), as in the example below. Jeffrey Hugo.
1479 dsdt.asl 1507: Store(0x1, Arg0)
1480 Remark 2146 - ^ Method Argument is never used (Arg0)
1482 All tools: Removed the bit width of the compiler that generated the tool
1483 from the common signon for all user space tools. This proved to be
1484 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
1485 from the generic makefiles (Thomas Petazzoni). Example below.
1488 ASL+ Optimizing Compiler version 20170119-32
1489 ASL+ Optimizing Compiler version 20170119-64
1492 ASL+ Optimizing Compiler version 20170119
1494 ----------------------------------------
1495 22 December 2016. Summary of changes for version 20161222:
1498 1) ACPICA kernel-resident subsystem:
1500 AML Debugger: Implemented a new mechanism to simplify and enhance
1501 debugger integration into all environments, including kernel debuggers
1502 and user-space utilities, as well as remote debug services. This
1503 mechanism essentially consists of new OSL interfaces to support debugger
1504 initialization/termination, as well as wait/notify interfaces to perform
1505 the debugger handshake with the host. Lv Zheng.
1508 AcpiOsInitializeDebugger (void)
1509 AcpiOsTerminateDebugger (void)
1510 AcpiOsWaitCommandReady (void)
1511 AcpiOsNotifyCommandComplete (void)
1513 New OS services layer:
1514 osgendbg.c -- Example implementation, and used for AcpiExec
1516 Update for Generic Address Space (GAS) support: Although the AccessWidth
1517 and/or BitOffset fields of the GAS are not often used, this change now
1518 fully supports these fields. This affects the internal support for FADT
1519 registers, registers in other ACPI data tables, and the AcpiRead and
1520 AcpiWrite public interfaces. Lv Zheng.
1522 Sleep support: In order to simplify integration of ACPI sleep for the
1523 various host operating systems, a new OSL interface has been introduced.
1524 AcpiOsEnterSleep allows the host to perform any required operations
1525 before the final write to the sleep control register(s) is performed by
1529 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
1531 Called from these internal interfaces:
1535 EFI support: Added a very small EFI/ACPICA example application. Provides
1536 a simple demo for EFI integration, as well as assisting with resolution
1537 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
1539 source/tools/efihello/efihello.c
1541 Local C library: Implemented several new functions to enhance ACPICA
1542 portability, for environments where these clib functions are not
1543 available (such as EFI). Lv Zheng:
1550 Fixed a regression where occasionally a valid resource descriptor was
1551 incorrectly detected as invalid at runtime, and a
1552 AE_AML_NO_RESOURCE_END_TAG was returned.
1554 Fixed a problem with the recently implemented support that enables
1555 control method invocations as Target operands to many ASL operators.
1556 Warnings of this form: "Needed type [Reference], found [Processor]" were
1557 seen at runtime for some method invocations.
1559 Example Code and Data Size: These are the sizes for the OS-independent
1560 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1561 debug version of the code includes the debug output trace mechanism and
1562 has a much larger code and data size.
1565 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
1566 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
1568 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1569 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1572 2) iASL Compiler/Disassembler and Tools:
1574 Disassembler: Enhanced output by adding the capability to detect and
1575 disassemble ASL Switch/Case statements back to the original ASL source
1576 code instead of if/else blocks. David Box.
1578 AcpiHelp: Split a large file into separate files based upon
1579 functionality/purpose. New files are:
1583 ----------------------------------------
1584 17 November 2016. Summary of changes for version 20161117:
1587 1) ACPICA kernel-resident subsystem:
1589 Table Manager: Fixed a regression introduced in 20160729, "FADT support
1590 cleanup". This was an attempt to remove all references in the source to
1591 the FADT version 2, which never was a legal version number. It was
1592 skipped because it was an early version of 64-bit support that was
1593 eventually abandoned for the current 64-bit support.
1595 Interpreter: Fixed a problem where runtime implicit conversion was
1596 incorrectly disabled for the ASL operators below. This brings the
1597 behavior into compliance with the ACPI specification:
1605 Table Manager: Added a new public interface, AcpiPutTable, used to
1606 release and free an ACPI table returned by AcpiGetTable and related
1607 interfaces. Lv Zheng.
1609 Example Code and Data Size: These are the sizes for the OS-independent
1610 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1611 debug version of the code includes the debug output trace mechanism and
1612 has a much larger code and data size.
1615 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1616 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1618 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1619 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1622 2) iASL Compiler/Disassembler and Tools:
1624 Disassembler: Fixed a regression for disassembly of Resource Template.
1625 Detection of templates in the AML stream missed some types of templates.
1627 iASL: Fixed a problem where an Access Size error was returned for the PCC
1628 address space when the AccessSize of the GAS register is greater than a
1631 iASL: Implemented several grammar changes for the operators below. These
1632 changes are slated for the next version of the ACPI specification:
1633 RefOf - Disallow method invocation as an operand
1634 CondRefOf - Disallow method invocation as an operand
1635 DerefOf - Disallow operands that use the result from operators
1637 do not return a reference (Changed TermArg to
1640 iASL: Control method invocations are now allowed for Target operands, as
1641 per the ACPI specification. Removed error for using a control method
1642 invocation as a Target operand.
1644 Disassembler: Improved detection of Resource Templates, Unicode, and
1645 Strings within Buffer objects. These subtypes do not contain a specific
1646 opcode to indicate the originating ASL code, and they must be detected by
1647 other means within the disassembler.
1649 iASL: Implemented an optimization improvement for 32-bit ACPI tables
1650 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
1651 only after 64-bit to 32-bit truncation. A truncation warning message is
1652 still emitted, however.
1654 AcpiXtract: Implemented handling for both types of line terminators (LF
1655 or CR/LF) so that it can accept AcpiDump output files from any system.
1658 AcpiBin: Added two new options for comparing AML files:
1659 -a: compare and display ALL mismatches
1660 -o: start compare at this offset into the second file
1662 ----------------------------------------
1663 30 September 2016. Summary of changes for version 20160930:
1666 1) ACPICA kernel-resident subsystem:
1668 Fixed a regression in the internal AcpiTbFindTable function where a non
1669 AE_OK exception could inadvertently be returned even if the function did
1670 not fail. This problem affects the following operators:
1674 Fixed a regression in the LoadTable operator where a load to any
1675 namespace location other than the root no longer worked properly.
1677 Increased the maximum loop count value that will result in the
1678 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
1679 prevent infinite loops within the AML interpreter and thus the host OS
1680 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
1683 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
1684 acpixf.h file. This allows hosts to easily configure the maximum loop
1687 Removed an illegal character in the strtoul64.c file. This character
1688 caused errors with some C compilers.
1690 Example Code and Data Size: These are the sizes for the OS-independent
1691 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1692 debug version of the code includes the debug output trace mechanism and
1693 has a much larger code and data size.
1696 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1697 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1699 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
1700 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1703 2) iASL Compiler/Disassembler and Tools:
1705 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
1706 the simpler ASL ElseIf keyword. During the conversion, a trailing If
1707 block could be lost and missing from the disassembled output.
1709 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
1710 the missing rule caused a parse error when using the Index operator as an
1711 operand to ObjectType. This construct now compiles properly. Example:
1712 ObjectType(PKG1[4]).
1714 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
1715 option). Previously, unresolved symbols could cause a protection fault.
1716 Such symbols are now marked as unresolved in the map file.
1718 iASL: Implemented support to allow control method invocations as an
1719 operand to the ASL DeRefOf operator. Example:
1720 DeRefOf(MTH1(Local0))
1722 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
1723 possible _PLD buffer now includes examination of both the normal buffer
1724 length (16 or 20) as well as the surrounding AML package length.
1726 Disassembler: Fixed a problem with the decoding of complex expressions
1727 within the Divide operator for ASL+. For the case where both the quotient
1728 and remainder targets are specified, the entire statement cannot be
1729 disassembled. Previously, the output incorrectly contained a mix of ASL-
1730 and ASL+ operators. This mixed statement causes a syntax error when
1732 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
1734 Divide (INT1 + 6, 128, RSLT, QUOT)
1736 iASL/Tools: Added support to process AML and non-AML ACPI tables
1737 consistently. For the disassembler and AcpiExec, allow all types of ACPI
1738 tables (AML and data tables). For the iASL -e option, allow only AML
1741 ----------------------------------------
1742 31 August 2016. Summary of changes for version 20160831:
1745 1) ACPICA kernel-resident subsystem:
1747 Improve support for the so-called "module-level code", which is defined
1748 to be math, logical and control AML opcodes that appear outside of any
1749 control method. This change improves the support by adding more opcodes
1750 that can be executed in the manner. Some other issues have been solved,
1751 and the ASL grammar changes to support such code under all scope
1752 operators (Device, etc.) are complete. Lv Zheng.
1754 UEFI support: these OSL functions have been implemented. This is an
1755 additional step toward supporting the AcpiExec utility natively (with
1756 full hardware access) under UEFI. Marcelo Ferreira.
1757 AcpiOsReadPciConfiguration
1758 AcpiOsWritePciConfiguration
1760 Fixed a possible mutex error during control method auto-serialization. Lv
1763 Updated support for the Generic Address Structure by fully implementing
1764 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
1767 Updated the return value for the internal _OSI method. Instead of
1768 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
1769 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
1770 implementations, and will be reflected and clarified in the next version
1771 of the ACPI specification.
1773 Implemented two new table events that can be passed to an ACPICA table
1774 handler. These events are used to indicate a table installation or
1775 uninstallation. These events are used in addition to existed table load
1776 and unload events. Lv Zheng.
1778 Implemented a cleanup for all internal string-to-integer conversions.
1779 Consolidate multiple versions of this functionality and limit possible
1780 bases to either 10 or 16 to simplify the code. Adds a new file,
1783 Cleanup the inclusion order of the various compiler-specific headers.
1784 This simplifies build configuration management. The compiler-specific
1785 headers are now split out from the host-specific headers. Lv Zheng.
1787 Example Code and Data Size: These are the sizes for the OS-independent
1788 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1789 debug version of the code includes the debug output trace mechanism and
1790 has a much larger code and data size.
1793 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
1794 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1797 2) iASL Compiler/Disassembler and Tools:
1799 iASL/AcpiExec: Added a command line option to display the build date/time
1800 of the tool (-vd). This can be useful to verify that the correct version
1801 of the tools are being used.
1803 AML Debugger: Implemented a new subcommand ("execute predef") to execute
1804 all predefined control methods and names within the current namespace.
1805 This can be useful for debugging problems with ACPI tables and the ACPI
1808 ----------------------------------------
1809 29 July 2016. Summary of changes for version 20160729:
1812 1) ACPICA kernel-resident subsystem:
1814 Implemented basic UEFI support for the various ACPICA tools. This
1816 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
1817 2) Support to obtain the ACPI tables on UEFI.
1818 3) Local implementation of required C library functions not available on
1820 4) A front-end (main) function for the tools for UEFI-related
1823 The initial deployment of this support is the AcpiDump utility executing
1824 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
1825 Current environments supported are Linux/Unix. MSVC generation is not
1826 supported at this time. See the generate/efi/README file for build
1827 instructions. Lv Zheng.
1829 Future plans include porting the AcpiExec utility to execute natively on
1830 the platform with I/O and memory access. This will allow viewing/dump of
1831 the platform namespace and native execution of ACPI control methods that
1832 access the actual hardware. To fully implement this support, the OSL
1833 functions below must be implemented with UEFI interfaces. Any community
1834 help in the implementation of these functions would be appreciated:
1839 AcpiOsReadPciConfiguration
1840 AcpiOsWritePciConfiguration
1842 Restructured and standardized the C library configuration for ACPICA,
1843 resulting in the various configuration options below. This includes a
1844 global restructuring of the compiler-dependent and platform-dependent
1845 include files. These changes may affect the existing platform-dependent
1846 configuration files on some hosts. Lv Zheng.
1848 The current C library configuration options appear below. For any issues,
1849 it may be helpful to examine the existing compiler-dependent and
1850 platform-dependent files as examples. Lv Zheng.
1853 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1855 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1856 2) Unix/Windows/BSD applications:
1857 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
1859 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1860 3) UEFI applications:
1861 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1863 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
1864 4) UEFI applications (EDK2/StdLib):
1865 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
1866 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
1869 AML interpreter: "module-level code" support. Allows for execution of so-
1870 called "executable" AML code (math/logical operations, etc.) outside of
1871 control methods not just at the module level (top level) but also within
1872 any scope declared outside of a control method - Scope{}, Device{},
1873 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
1875 Simplified the configuration of the "maximum AML loops" global option by
1876 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
1877 modified at runtime.
1880 Example Code and Data Size: These are the sizes for the OS-independent
1881 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1882 debug version of the code includes the debug output trace mechanism and
1883 has a much larger code and data size.
1886 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
1887 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
1890 2) iASL Compiler/Disassembler and Tools:
1892 iASL: Add full support for the RASF ACPI table (RAS Features Table).
1893 Includes disassembler, data table compiler, and header support.
1895 iASL Expand "module-level code" support. Allows for
1896 compilation/disassembly of so-called "executable" AML code (math/logical
1897 operations, etc.) outside of control methods not just at the module level
1898 (top level) but also within any scope declared outside of a control
1899 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
1902 AcpiDump: Added support for dumping all SSDTs on newer versions of
1903 Windows. These tables are now easily available -- SSDTs are not available
1904 through the registry on older versions.
1906 ----------------------------------------
1907 27 May 2016. Summary of changes for version 20160527:
1910 1) ACPICA kernel-resident subsystem:
1912 Temporarily reverted the new arbitrary bit length/alignment support in
1913 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
1914 a number of regressions with the new code that need to be fully resolved
1915 and tested before this support can be finally integrated into ACPICA.
1916 Apologies for any inconveniences these issues may have caused.
1918 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
1919 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
1920 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
1922 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
1923 option. Adds a new return macro, return_STR. Junk-uk Kim.
1925 Example Code and Data Size: These are the sizes for the OS-independent
1926 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1927 debug version of the code includes the debug output trace mechanism and
1928 has a much larger code and data size.
1931 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
1932 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1934 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1935 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
1937 ----------------------------------------
1938 22 April 2016. Summary of changes for version 20160422:
1940 1) ACPICA kernel-resident subsystem:
1942 Fixed a regression in the GAS (generic address structure) arbitrary bit
1943 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
1944 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
1946 ACPI 6.0: Added support for new/renamed resource macros. One new argument
1947 was added to each of these macros, and the original name has been
1948 deprecated. The AML disassembler will always disassemble to the new
1949 names. Support for the new macros was added to iASL, disassembler,
1950 resource manager, and the acpihelp utility. ACPICA BZ 1274.
1952 I2cSerialBus -> I2cSerialBusV2
1953 SpiSerialBus -> SpiSerialBusV2
1954 UartSerialBus -> UartSerialBusV2
1956 ACPI 6.0: Added support for a new integer field that was appended to the
1957 package object returned by the _BIX method. This adds iASL compile-time
1958 and AML runtime error checking. ACPICA BZ 1273.
1960 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
1961 Subspace Type2" (Headers, Disassembler, and data table compiler).
1963 Example Code and Data Size: These are the sizes for the OS-independent
1964 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1965 debug version of the code includes the debug output trace mechanism and
1966 has a much larger code and data size.
1969 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1970 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1972 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1973 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1976 2) iASL Compiler/Disassembler and Tools:
1978 iASL: Implemented an ASL grammar extension to allow/enable executable
1979 "module-level code" to be created and executed under the various
1980 operators that create new scopes. This type of AML code is already
1981 supported in all known AML interpreters, and the grammar change will
1982 appear in the next version of the ACPI specification. Simplifies the
1983 conditional runtime creation of named objects under these object types:
1991 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
1992 ease-of-use to the ASL language. The syntax is similar to the
1993 corresponding C operator, and is implemented with the existing AML While
1994 opcode -- thus requiring no changes to existing AML interpreters.
1996 For (Initialize, Predicate, Update) {TermList}
2001 Initializer // Nothing | TermArg => ComputationalData
2002 Predicate // Nothing | TermArg => ComputationalData
2003 Update // Nothing | TermArg => ComputationalData
2007 iASL: The _HID/_ADR detection and validation has been enhanced to search
2008 under conditionals in order to allow these objects to be conditionally
2011 iASL: Fixed several issues with the constant folding feature. The
2012 improvement allows better detection and resolution of statements that can
2013 be folded at compile time. ACPICA BZ 1266.
2015 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
2016 conversion to the ASL ElseIf operator where incorrect ASL code could be
2019 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
2020 sometimes an extra (and extraneous) set of parentheses were emitted for
2021 some combinations of operators. Although this did not cause any problems
2022 with recompilation of the disassembled code, it made the code more
2023 difficult to read. David Box. ACPICA BZ 1231.
2025 iASL: Changed to ignore the unreferenced detection for predefined names
2026 of resource descriptor elements, when the resource descriptor is
2027 created/defined within a control method.
2029 iASL: Disassembler: Fix a possible fault with externally declared Buffer
2032 ----------------------------------------
2033 18 March 2016. Summary of changes for version 20160318:
2035 1) ACPICA kernel-resident subsystem:
2037 Added support for arbitrary bit lengths and bit offsets for registers
2038 defined by the Generic Address Structure. Previously, only aligned bit
2039 lengths of 8/16/32/64 were supported. This was sufficient for many years,
2040 but recently some machines have been seen that require arbitrary bit-
2041 level support. ACPICA BZ 1240. Lv Zheng.
2043 Fixed an issue where the \_SB._INI method sometimes must be evaluated
2044 before any _REG methods are evaluated. Lv Zheng.
2046 Implemented several changes related to ACPI table support
2047 (Headers/Disassembler/TableCompiler):
2048 NFIT: For ACPI 6.1, updated to add some additional new fields and
2050 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
2052 DMAR: Added new constants per the 10/2014 DMAR spec.
2053 IORT: Added new subtable per the 10/2015 IORT spec.
2054 HEST: For ACPI 6.1, added new constants and new subtable.
2055 DBG2: Added new constants per the 12/2015 DBG2 spec.
2056 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
2058 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
2060 Updated header support for the DMAR table to match the current version of
2063 Added extensions to the ASL Concatenate operator to allow any ACPI object
2064 to be passed as an operand. Any object other than Integer/String/Buffer
2065 simply returns a string containing the object type. This extends the
2066 usefulness of the Printf macros. Previously, Concatenate would abort the
2067 control method if a non-data object was encountered.
2069 ACPICA source code: Deployed the C "const" keyword across the source code
2070 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
2072 Example Code and Data Size: These are the sizes for the OS-independent
2073 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2074 debug version of the code includes the debug output trace mechanism and
2075 has a much larger code and data size.
2078 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2079 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2081 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2082 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2085 2) iASL Compiler/Disassembler and Tools:
2087 iASL/Disassembler: Improved the heuristic used to determine the number of
2088 arguments for an externally defined control method (a method in another
2089 table). Although this is an improvement, there is no deterministic way to
2090 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
2091 will completely solve this problem as it is deployed (automatically) in
2094 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
2095 statements that could cause errors when the disassembled file is
2096 compiled. ACPICA BZ 1243. David Box.
2098 iASL: Fixed a regression caused by the merger of the two versions of the
2099 local strtoul64. Because of a dependency on a global variable, strtoul64
2100 could return an error for integers greater than a 32-bit value. ACPICA BZ
2103 iASL: Fixed a regression where a fault could occur for an ASL Return
2104 statement if it invokes a control method that is not resolved. ACPICA BZ
2107 AcpiXtract: Improved input file validation: detection of binary files and
2108 non-acpidump text files.
2110 ----------------------------------------
2111 12 February 2016. Summary of changes for version 20160212:
2113 1) ACPICA kernel-resident subsystem:
2115 Implemented full support for the ACPI 6.1 specification (released in
2116 January). This version of the specification is available at:
2117 http://www.uefi.org/specifications
2119 Only a relatively small number of changes were required in ACPICA to
2120 support ACPI 6.1, in these areas:
2121 - New predefined names
2123 - A new subtable for HEST
2124 - A few other header changes for new values
2126 Ensure \_SB_._INI is executed before any _REG methods are executed. There
2127 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
2129 Reverted a change made in version 20151218 which enabled method
2130 invocations to be targets of various ASL operators (SuperName and Target
2131 grammar elements). While the new behavior is supported by the ACPI
2132 specification, other AML interpreters do not support this behavior and
2133 never will. The ACPI specification will be updated for ACPI 6.2 to remove
2134 this support. Therefore, the change was reverted to the original ACPICA
2137 ACPICA now supports the GCC 6 compiler.
2139 Current Release: (Note: build changes increased sizes)
2140 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2141 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2143 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2144 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
2147 2) iASL Compiler/Disassembler and Tools:
2149 Completed full support for the ACPI 6.0 External() AML opcode. The
2150 compiler emits an external AML opcode for each ASL External statement.
2151 This opcode is used by the disassembler to assist with the disassembly of
2152 external control methods by specifying the required number of arguments
2153 for the method. AML interpreters do not use this opcode. To ensure that
2154 interpreters do not even see the opcode, a block of one or more external
2155 opcodes is surrounded by an "If(0)" construct. As this feature becomes
2156 commonly deployed in BIOS code, the ability of disassemblers to correctly
2157 disassemble AML code will be greatly improved. David Box.
2159 iASL: Implemented support for an optional cross-reference output file.
2160 The -lx option will create a the cross-reference file with the suffix
2161 "xrf". Three different types of cross-reference are created in this file:
2162 - List of object references made from within each control method
2163 - Invocation (caller) list for each user-defined control method
2164 - List of references to each non-method object in the namespace
2166 iASL: Method invocations as ASL Target operands are now disallowed and
2167 flagged as errors in preparation for ACPI 6.2 (see the description of the
2170 ----------------------------------------
2171 8 January 2016. Summary of changes for version 20160108:
2173 1) ACPICA kernel-resident subsystem:
2175 Updated all ACPICA copyrights and signons to 2016: Added the 2016
2176 copyright to all source code module headers and utility/tool signons.
2177 This includes the standard Linux dual-license header. This affects
2178 virtually every file in the ACPICA core subsystem, iASL compiler, all
2179 ACPICA utilities, and the ACPICA test suite.
2181 Fixed a regression introduced in version 20151218 concerning the
2182 execution of so-called module-level ASL/AML code. Namespace objects
2183 created under a module-level If() construct were not properly/fully
2184 entered into the namespace and could cause an interpreter fault when
2187 Example Code and Data Size: These are the sizes for the OS-independent
2188 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2189 debug version of the code includes the debug output trace mechanism and
2190 has a much larger code and data size.
2193 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2194 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
2196 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2197 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2200 2) iASL Compiler/Disassembler and Tools:
2202 Fixed a problem with the compilation of the GpioIo and GpioInt resource
2203 descriptors. The _PIN field name was incorrectly defined to be an array
2204 of 32-bit values, but the _PIN values are in fact 16 bits each. This
2205 would cause incorrect bit width warnings when using Word (16-bit) fields
2206 to access the descriptors.
2209 ----------------------------------------
2210 18 December 2015. Summary of changes for version 20151218:
2212 1) ACPICA kernel-resident subsystem:
2214 Implemented per-AML-table execution of "module-level code" as individual
2215 ACPI tables are loaded into the namespace during ACPICA initialization.
2216 In other words, any module-level code within an AML table is executed
2217 immediately after the table is loaded, instead of batched and executed
2218 after all of the tables have been loaded. This provides compatibility
2219 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
2222 To fully support the feature above, the default operation region handlers
2223 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
2224 installed before any ACPI tables are loaded. This enables module-level
2225 code to access these address spaces during the table load and module-
2226 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
2229 Implemented several changes to the internal _REG support in conjunction
2230 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
2231 utilities for the changes above. Although these tools were changed, host
2232 operating systems that simply use the default handlers for SystemMemory,
2233 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
2235 For example, in the code below, DEV1 is conditionally added to the
2236 namespace by the DSDT via module-level code that accesses an operation
2237 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
2238 created immediately after the DSDT is loaded in order for the SSDT to
2239 successfully reference DEV1. Previously, this code would cause an
2240 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
2241 fully supported by ACPICA.
2243 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
2245 OperationRegion (OPR1, SystemMemory, 0x400, 32)
2246 Field (OPR1, AnyAcc, NoLock, Preserve)
2257 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
2259 External (\DEV1, DeviceObj)
2265 Fixed an AML interpreter problem where control method invocations were
2266 not handled correctly when the invocation was itself a SuperName argument
2267 to another ASL operator. In these cases, the method was not invoked.
2268 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
2273 Decrement, Increment
2276 Signal, Release, Reset
2279 Implemented automatic String-to-ObjectReference conversion support for
2280 packages returned by predefined names (such as _DEP). A common BIOS error
2281 is to add double quotes around an ObjectReference namepath, which turns
2282 the reference into an unexpected string object. This support detects the
2283 problem and corrects it before the package is returned to the caller that
2284 invoked the method. Lv Zheng.
2286 Implemented extensions to the Concatenate operator. Concatenate now
2287 accepts any type of object, it is not restricted to simply
2288 Integer/String/Buffer. For objects other than these 3 basic data types,
2289 the argument is treated as a string containing the name of the object
2290 type. This expands the utility of Concatenate and the Printf/Fprintf
2291 macros. ACPICA BZ 1222.
2293 Cleaned up the output of the ASL Debug object. The timer() value is now
2294 optional and no longer emitted by default. Also, the basic data types of
2295 Integer/String/Buffer are simply emitted as their values, without a data
2296 type string -- since the data type is obvious from the output. ACPICA BZ
2299 Example Code and Data Size: These are the sizes for the OS-independent
2300 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2301 debug version of the code includes the debug output trace mechanism and
2302 has a much larger code and data size.
2305 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2306 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2308 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2309 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2312 2) iASL Compiler/Disassembler and Tools:
2314 iASL: Fixed some issues with the ASL Include() operator. This operator
2315 was incorrectly defined in the iASL parser rules, causing a new scope to
2316 be opened for the code within the include file. This could lead to
2317 several issues, including allowing ASL code that is technically illegal
2318 and not supported by AML interpreters. Note, this does not affect the
2319 related #include preprocessor operator. ACPICA BZ 1212.
2321 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
2322 operator is essentially an ASL macro since there is no AML opcode
2323 associated with it. The code emitted by the iASL compiler for ElseIf is
2324 an Else opcode followed immediately by an If opcode. The disassembler
2325 will now emit an ElseIf if it finds an Else immediately followed by an
2326 If. This simplifies the decoded ASL, especially for deeply nested
2327 If..Else and large Switch constructs. Thus, the disassembled code more
2328 closely follows the original source ASL. ACPICA BZ 1211. Example:
2340 ElseIf (Arg0 == 0x02)
2345 AcpiExec: Added support for the new module level code behavior and the
2346 early region installation. This required a small change to the
2347 initialization, since AcpiExec must install its own operation region
2350 AcpiExec: Added support to make the debug object timer optional. Default
2351 is timer disabled. This cleans up the debug object output -- the timer
2352 data is rarely used.
2354 AcpiExec: Multiple ACPI tables are now loaded in the order that they
2355 appear on the command line. This can be important when there are
2356 interdependencies/references between the tables.
2358 iASL/Templates. Add support to generate template files with multiple
2359 SSDTs within a single output file. Also added ommand line support to
2360 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
2364 ----------------------------------------
2365 24 November 2015. Summary of changes for version 20151124:
2367 1) ACPICA kernel-resident subsystem:
2369 Fixed a possible regression for a previous update to FADT handling. The
2370 FADT no longer has a fixed table ID, causing some issues with code that
2371 was hardwired to a specific ID. Lv Zheng.
2373 Fixed a problem where the method auto-serialization could interfere with
2374 the current SyncLevel. This change makes the auto-serialization support
2375 transparent to the SyncLevel support and management.
2377 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
2378 interface is intended for early access to the namespace during the
2379 initial namespace device discovery walk. The _SUB method has been seen to
2380 access operation regions in some cases, causing errors because the
2381 operation regions are not fully initialized.
2383 AML Debugger: Fixed some issues with the terminate/quit/exit commands
2384 that can cause faults. Lv Zheng.
2386 AML Debugger: Add thread ID support so that single-step mode only applies
2387 to the AML Debugger thread. This prevents runtime errors within some
2390 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
2391 methods that are invoked by this interface are optional, removed warnings
2392 emitted for the case where one or more of these methods do not exist.
2393 ACPICA BZ 1208, original change by Prarit Bhargava.
2395 Made a major pass through the entire ACPICA source code base to
2396 standardize formatting that has diverged a bit over time. There are no
2397 functional changes, but this will of course cause quite a few code
2398 differences from the previous ACPICA release.
2400 Example Code and Data Size: These are the sizes for the OS-independent
2401 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2402 debug version of the code includes the debug output trace mechanism and
2403 has a much larger code and data size.
2406 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2407 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2409 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2410 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2413 2) iASL Compiler/Disassembler and Tools:
2415 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
2416 definition blocks within a single ASL file and the resulting AML file.
2417 Support for this type of file was also added to the various tools that
2418 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
2419 example code below shows two definition blocks within the same file:
2421 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
2425 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
2429 iASL: Enhanced typechecking for the Name() operator. All expressions for
2430 the value of the named object must be reduced/folded to a single constant
2431 at compile time, as per the ACPI specification (the AML definition of
2434 iASL: Fixed some code indentation issues for the -ic and -ia options (C
2435 and assembly headers). Now all emitted code correctly begins in column 1.
2437 iASL: Added an error message for an attempt to open a Scope() on an
2438 object defined in an SSDT. The DSDT is always loaded into the namespace
2439 first, so any attempt to open a Scope on an SSDT object will fail at
2443 ----------------------------------------
2444 30 September 2015. Summary of changes for version 20150930:
2446 1) ACPICA kernel-resident subsystem:
2448 Debugger: Implemented several changes and bug fixes to assist support for
2449 the in-kernel version of the AML debugger. Lv Zheng.
2450 - Fix the "predefined" command for in-kernel debugger.
2451 - Do not enter debug command loop for the help and version commands.
2452 - Disallow "execute" command during execution/single-step of a method.
2454 Interpreter: Updated runtime typechecking for all operators that have
2455 target operands. The operand is resolved and validated that it is legal.
2456 For example, the target cannot be a non-data object such as a Device,
2457 Mutex, ThermalZone, etc., as per the ACPI specification.
2459 Debugger: Fixed the double-mutex user I/O handshake to work when local
2460 deadlock detection is enabled.
2462 Debugger: limited display of method locals and arguments (LocalX and
2463 ArgX) to only those that have actually been initialized. This prevents
2464 lines of extraneous output.
2466 Updated the definition of the NFIT table to correct the bit polarity of
2467 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
2469 Example Code and Data Size: These are the sizes for the OS-independent
2470 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2471 debug version of the code includes the debug output trace mechanism and
2472 has a much larger code and data size.
2475 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2476 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2478 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2479 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2482 2) iASL Compiler/Disassembler and Tools:
2484 iASL: Improved the compile-time typechecking for operands of many of the
2487 -- Added an option to disable compiler operand/operator typechecking (-
2490 -- For the following operators, the TermArg operands are now validated
2491 when possible to be Integer data objects: BankField, OperationRegion,
2492 DataTableRegion, Buffer, and Package.
2494 -- Store (Source, Target): Both the source and target operands are
2495 resolved and checked that the operands are both legal. For example,
2496 neither operand can be a non-data object such as a Device, Mutex,
2497 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
2498 operator can be used to store an object to any type of target object.
2500 -- Store (Source, Target): If the source is a Package object, the target
2501 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
2502 is a Package, the source must also be a Package.
2504 -- Store (Source, Target): A warning is issued if the source and target
2505 resolve to the identical named object.
2507 -- Store (Source, <method invocation>): An error is generated for the
2508 target method invocation, as this construct is not supported by the AML
2511 -- For all ASL math and logic operators, the target operand must be a
2512 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
2513 includes the function return value also.
2515 -- External declarations are also included in the typechecking where
2516 possible. External objects defined using the UnknownObj keyword cannot be
2517 typechecked, however.
2519 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
2521 - Legacy code: Index(PKG1, 3)
2522 - New ASL+ code: PKG1[3]
2523 This completes the ACPI 6.0 ASL+ support as it was the only operator not
2526 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
2527 spaces were inadvertently appended to the filename, causing file access
2528 and deletion problems on some systems.
2530 ASL Test Suite (ASLTS): Updated the master makefile to generate all
2531 possible compiler output files when building the test suite -- thus
2532 exercising these features of the compiler. These files are automatically
2533 deleted when the test suite exits.
2536 ----------------------------------------
2537 18 August 2015. Summary of changes for version 20150818:
2539 1) ACPICA kernel-resident subsystem:
2541 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
2542 Zheng. ACPICA BZ 1186.
2544 Completed development to ensure that the ACPICA Disassembler and Debugger
2545 are fully standalone components of ACPICA. Removed cross-component
2546 dependences. Lv Zheng.
2548 The max-number-of-AML-loops is now runtime configurable (previously was
2549 compile-time only). This is essentially a loop timeout to force-abort
2550 infinite AML loops. ACPCIA BZ 1192.
2552 Debugger: Cleanup output to dump ACPI names and namepaths without any
2553 trailing underscores. Lv Zheng. ACPICA BZ 1135.
2555 Removed unnecessary conditional compilations across the Debugger and
2556 Disassembler components where entire modules could be left uncompiled.
2558 The aapits test is deprecated and has been removed from the ACPICA git
2559 tree. The test has never been completed and has not been maintained, thus
2560 becoming rather useless. ACPICA BZ 1015, 794.
2562 A batch of small changes to close bugzilla and other reports:
2563 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
2564 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
2565 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
2566 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
2568 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
2570 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
2572 - Debugger: Split debugger initialization/termination interfaces. Lv
2574 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
2576 - AcpiExec: Add debug message during _REG method phase during table
2578 - AcpiNames: Fix a regression where some output was missing and no longer
2580 - Debugger: General cleanup and simplification. Lv Zheng.
2581 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
2583 Example Code and Data Size: These are the sizes for the OS-independent
2584 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2585 debug version of the code includes the debug output trace mechanism and
2586 has a much larger code and data size.
2589 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2590 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2592 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2593 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2596 2) iASL Compiler/Disassembler and Tools:
2598 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
2599 were not handled properly and caused load errors. Now, properly invoke
2600 and use the ACPICA auto-reallocate mechanism for ACPI table data
2601 structures. ACPICA BZ 1188
2603 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
2606 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
2607 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
2608 executed during initialization. ACPICA BZ 1187, 1189.
2610 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
2611 that corresponds to each disassembled ASL statement, to simplify
2612 debugging. ACPICA BZ 1191.
2614 Debugger: Add option to the "objects" command to display a summary of the
2615 current namespace objects (Object type and count). This is displayed if
2616 the command is entered with no arguments.
2618 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
2621 ----------------------------------------
2622 17 July 2015. Summary of changes for version 20150717:
2624 1) ACPICA kernel-resident subsystem:
2626 Improved the partitioning between the Debugger and Disassembler
2627 components. This allows the Debugger to be used standalone within kernel
2628 code without the Disassembler (which is used for single stepping also).
2629 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
2631 Debugger: Implemented a new command to trace the execution of control
2632 methods (Trace). This is especially useful for the in-kernel version of
2633 the debugger when file I/O may not be available for method trace output.
2634 See the ACPICA reference for more information. Lv Zheng.
2636 Moved all C library prototypes (used for the local versions of these
2637 functions when requested) to a new header, acclib.h
2638 Cleaned up the use of non-ANSI C library functions. These functions are
2639 implemented locally in ACPICA. Moved all such functions to a common
2640 source file, utnonansi.c
2642 Debugger: Fixed a problem with the "!!" command (get last command
2643 executed) where the debugger could enter an infinite loop and eventually
2646 Removed the use of local macros that were used for some of the standard C
2647 library functions to automatically cast input parameters. This mostly
2648 affected the is* functions where the input parameter is defined to be an
2649 int. This required a few modifications to the main ACPICA source code to
2650 provide casting for these functions and eliminate possible compiler
2651 warnings for these parameters.
2653 Across the source code, added additional status/error checking to resolve
2654 issues discovered by static source code analysis tools such as Coverity.
2656 Example Code and Data Size: These are the sizes for the OS-independent
2657 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2658 debug version of the code includes the debug output trace mechanism and
2659 has a much larger code and data size.
2662 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2663 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2665 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2666 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2669 2) iASL Compiler/Disassembler and Tools:
2671 iASL: Fixed a regression where the device map file feature no longer
2672 worked properly when used in conjunction with the disassembler. It only
2673 worked properly with the compiler itself.
2675 iASL: Implemented a new warning for method LocalX variables that are set
2676 but never used (similar to a C compiler such as gcc). This also applies
2677 to ArgX variables that are not defined by the parent method, and are
2678 instead (legally) used as local variables.
2680 iASL/Preprocessor: Finished the pass-through of line numbers from the
2681 preprocessor to the compiler. This ensures that compiler errors/warnings
2682 have the correct original line numbers and filenames, regardless of any
2685 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
2686 pass-through of comments to the preprocessor output file (which becomes
2687 the compiler input file). Also fixed a problem with // comments that
2688 appear after a math expression.
2690 iASL: Added support for the TCPA server table to the table compiler and
2691 template generator. (The client table was already previously supported)
2693 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
2694 identify the iASL compiler.
2696 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
2697 multiple times. The new names are ACPI_SIGN_NEGATIVE and
2700 AcpiHelp: Update to expand help messages for the iASL preprocessor
2704 ----------------------------------------
2705 19 June 2015. Summary of changes for version 20150619:
2707 Two regressions in version 20150616 have been addressed:
2709 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
2710 etc.) This update changes ACPICA to only use the standard headers for
2711 functions, or the prototypes for the local versions of the C library
2712 functions. Across the source code, this required some additional casts
2713 for some Clib invocations for portability. Moved all local prototypes to
2714 a new file, acclib.h
2716 Fixes several problems with recent changes to the handling of the FACS
2717 table that could cause some systems not to boot.
2720 ----------------------------------------
2721 16 June 2015. Summary of changes for version 20150616:
2724 1) ACPICA kernel-resident subsystem:
2726 Across the entire ACPICA source code base, the various macros for the C
2727 library functions (such as ACPI_STRLEN, etc.) have been removed and
2728 replaced by the standard C library names (strlen, etc.) The original
2729 purpose for these macros is no longer applicable. This simplification
2730 reduces the number of macros used in the ACPICA source code
2731 significantly, improving readability and maintainability.
2733 Implemented support for a new ACPI table, the OSDT. This table, the
2734 "override" SDT, can be loaded directly by the host OS at boot time. It
2735 enables the replacement of existing namespace objects that were installed
2736 via the DSDT and/or SSDTs. The primary purpose for this is to replace
2737 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
2738 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
2741 Added support for systems with (improperly) two FACS tables -- a "32-bit"
2742 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
2743 X field). This change will support both automatically. There continues to
2744 be systems found with this issue. This support requires a change to the
2745 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
2746 been added to allow the host to select which FACS is desired
2747 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
2750 Added a new feature to allow for systems that do not contain an FACS.
2751 Although this is already supported on hardware-reduced platforms, the
2752 feature has been extended for all platforms. The reasoning is that we do
2753 not want to abort the entire ACPICA initialization just because the
2754 system is seriously buggy and has no FACS.
2756 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
2757 not correctly transcribed from the ACPI specification in ACPICA version
2760 Implemented support for the _CLS object in the AcpiGetObjectInfo external
2763 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
2764 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
2765 compiler also updated. Note: The TCPA "server" table is not supported by
2766 the disassembler/table-compiler at this time.
2768 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
2770 Example Code and Data Size: These are the sizes for the OS-independent
2771 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2772 debug version of the code includes the debug output trace mechanism and
2773 has a much larger code and data size.
2776 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2777 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2779 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2780 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2783 2) iASL Compiler/Disassembler and Tools:
2785 Disassembler: Fixed a problem with the new symbolic operator disassembler
2786 where incorrect ASL code could be emitted in some cases for the "non-
2787 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
2788 ShiftRight. The actual problem cases seem to be rather unusual in common
2789 ASL code, however. David Box.
2791 Modified the linux version of acpidump to obtain ACPI tables from not
2792 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
2795 iASL: Fixed a problem where the user preprocessor output file (.i)
2796 contained extra data that was not expected. The compiler was using this
2797 file as a temporary file and passed through #line directives in order to
2798 keep compiler error messages in sync with the input file and line number
2799 across multiple include files. The (.i) is no longer a temporary file as
2800 the compiler uses a new, different file for the original purpose.
2802 iASL: Fixed a problem where comments within the original ASL source code
2803 file were not passed through to the preprocessor output file, nor any
2806 iASL: Fixed some issues for the handling of the "#include" preprocessor
2807 directive and the similar (but not the same) "Include" ASL operator.
2809 iASL: Add support for the new OSDT in both the disassembler and compiler.
2811 iASL: Fixed a problem with the constant folding support where a Buffer
2812 object could be incorrectly generated (incorrectly formed) during a
2813 conversion to a Store() operator.
2815 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
2816 description text for the _REV predefined name. _REV now permanently
2817 returns 2, as per the ACPI 6.0 specification.
2819 Debugger: Enhanced the output of the Debug ASL object for references
2820 produced by the Index operator. For Buffers and strings, only output the
2821 actual byte pointed to by the index. For packages, only print the single
2822 package element decoded by the index. Previously, the entire
2823 buffer/string/package was emitted.
2825 iASL/Table-compiler: Fixed a regression where the "generic" data types
2826 were no longer recognized, causing errors.
2829 ----------------------------------------
2830 15 May 2015. Summary of changes for version 20150515:
2832 This release implements most of ACPI 6.0 as described below.
2834 1) ACPICA kernel-resident subsystem:
2836 Implemented runtime argument checking and return value checking for all
2837 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
2838 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
2840 Example Code and Data Size: These are the sizes for the OS-independent
2841 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2842 debug version of the code includes the debug output trace mechanism and
2843 has a much larger code and data size.
2846 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2847 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2849 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2850 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2853 2) iASL Compiler/Disassembler and Tools:
2855 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
2856 names (argument count validation and return value typechecking.)
2858 iASL disassembler and table compiler: implemented support for all new
2859 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
2861 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
2864 iASL preprocessor: Added a new directive to enable inclusion of binary
2865 blobs into ASL code. The new directive is #includebuffer. It takes a
2866 binary file as input and emits a named ascii buffer object into the ASL
2869 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
2871 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
2874 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
2878 ----------------------------------------
2879 10 April 2015. Summary of changes for version 20150410:
2881 Reverted a change introduced in version 20150408 that caused
2882 a regression in the disassembler where incorrect operator
2883 symbols could be emitted.
2886 ----------------------------------------
2887 08 April 2015. Summary of changes for version 20150408:
2890 1) ACPICA kernel-resident subsystem:
2892 Permanently set the return value for the _REV predefined name. It now
2893 returns 2 (was 5). This matches other ACPI implementations. _REV will be
2894 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
2895 for ACPI 2.0 and later. It should never be used to differentiate or
2896 identify operating systems.
2898 Added the "Windows 2015" string to the _OSI support. ACPICA will now
2899 return TRUE to a query with this string.
2901 Fixed several issues with the local version of the printf function.
2903 Added the C99 compiler option (-std=c99) to the Unix makefiles.
2906 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
2907 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
2909 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2910 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2913 2) iASL Compiler/Disassembler and Tools:
2915 iASL: Implemented an enhancement to the constant folding feature to
2916 transform the parse tree to a simple Store operation whenever possible:
2917 Add (2, 3, X) ==> is converted to: Store (5, X)
2918 X = 2 + 3 ==> is converted to: Store (5, X)
2920 Updated support for the SLIC table (Software Licensing Description Table)
2921 in both the Data Table compiler and the disassembler. The SLIC table
2922 support now conforms to "Microsoft Software Licensing Tables (SLIC and
2923 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
2924 following the ACPI header is now defined to be "Proprietary Data", and as
2925 such, can only be entered or displayed as a hex data block.
2927 Implemented full support for the MSDM table as described in the document
2928 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
2929 following the ACPI header is defined to be "Proprietary Data", and can
2930 only be entered or displayed as a hex data block.
2932 Implemented the -Pn option for the iASL Table Compiler (was only
2933 implemented for the ASL compiler). This option disables the iASL
2936 Disassembler: For disassembly of Data Tables, added a comment field
2937 around the Ascii equivalent data that is emitted as part of the "Raw
2938 Table Data" block. This prevents the iASL Preprocessor from possible
2939 confusion if/when the table is compiled.
2941 Disassembler: Added an option (-df) to force the disassembler to assume
2942 that the table being disassembled contains valid AML. This feature is
2943 useful for disassembling AML files that contain ACPI signatures other
2944 than DSDT or SSDT (such as OEMx or other signatures).
2946 Changes for the EFI version of the tools:
2947 1) Fixed a build error/issue
2948 2) Fixed a cast warning
2950 iASL: Fixed a path issue with the __FILE__ operator by making the
2951 directory prefix optional within the internal SplitInputFilename
2954 Debugger: Removed some unused global variables.
2956 Tests: Updated the makefile for proper generation of the AAPITS suite.
2959 ----------------------------------------
2960 04 February 2015. Summary of changes for version 20150204:
2962 ACPICA kernel-resident subsystem:
2964 Updated all ACPICA copyrights and signons to 2014. Added the 2014
2965 copyright to all module headers and signons, including the standard Linux
2966 header. This affects virtually every file in the ACPICA core subsystem,
2967 iASL compiler, all ACPICA utilities, and the test suites.
2969 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
2970 A raw gpe handling mechanism was created to allow better handling of GPE
2971 storms that aren't easily managed by the normal handler. The raw handler
2972 allows disabling/renabling of the the GPE so that interrupt storms can be
2973 avoided in cases where events cannot be timely serviced. In this
2974 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
2975 GPE. This API will leave the reference counts undisturbed, thereby
2976 preventing unintentional clearing of the GPE when the intent in only to
2977 temporarily disable it. Raw handlers allow enabling and disabling of a
2978 GPE by removing GPE register locking. As such, raw handlers much provide
2979 their own locks while using GPE API's to protect access to GPE data
2983 Events: Always modify GPE registers under the GPE lock.
2984 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
2985 values. Reported as bug by joe.liu@apple.com.
2987 Unix makefiles: Separate option to disable optimizations and
2988 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
2989 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
2990 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
2991 errors when building ACPICA. This allows disabling the option without
2992 also having to disable optimazations.
2996 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2997 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
3000 --------------------------------------
3001 07 November 2014. Summary of changes for version 20141107:
3003 This release is available at https://acpica.org/downloads
3005 This release introduces and implements language extensions to ASL that
3006 provide support for symbolic ("C-style") operators and expressions. These
3007 language extensions are known collectively as ASL+.
3010 1) iASL Compiler/Disassembler and Tools:
3012 Disassembler: Fixed a problem with disassembly of the UartSerialBus
3013 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
3016 Disassembler: Fixed the Unicode macro support to add escape sequences.
3017 All non-printable ASCII values are emitted as escape sequences, as well
3018 as the standard escapes for quote and backslash. Ensures that the
3019 disassembled macro can be correctly recompiled.
3021 iASL: Added Printf/Fprintf macros for formatted output. These macros are
3022 translated to existing AML Concatenate and Store operations. Printf
3023 writes to the ASL Debug object. Fprintf allows the specification of an
3024 ASL name as the target. Only a single format specifier is required, %o,
3025 since the AML interpreter dynamically converts objects to the required
3028 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3029 (Concatenate (Concatenate (Concatenate ("", Arg0),
3030 ": Unexpected value for "), Arg1), ", "), Arg2),
3031 " at line "), Arg3), Debug)
3033 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
3034 Arg0, Arg1, Arg2, Arg3)
3036 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3037 ("", Arg1), ": "), Arg0), " Successful"), STR1)
3039 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
3041 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
3042 ASL parse tree before the AML code is generated. This allows blocks of
3043 ASL code to be removed in order to help locate and identify problem
3044 devices and/or code. David E. Box.
3046 AcpiExec: Added support (-fi) for an optional namespace object
3047 initialization file. This file specifies initial values for namespace
3048 objects as necessary for debugging and testing different ASL code paths
3049 that may be taken as a result of BIOS options.
3052 2) Overview of symbolic operator support for ASL (ASL+)
3053 -------------------------------------------------------
3055 As an extension to the ASL language, iASL implements support for symbolic
3056 (C-style) operators for math and logical expressions. This can greatly
3057 simplify ASL code as well as improve both readability and
3058 maintainability. These language extensions can exist concurrently with
3059 all legacy ASL code and expressions.
3061 The symbolic extensions are 100% compatible with existing AML
3062 interpreters, since no new AML opcodes are created. To implement the
3063 extensions, the iASL compiler transforms the symbolic expressions into
3064 the legacy ASL/AML equivalents at compile time.
3066 Full symbolic expressions are supported, along with the standard C
3067 precedence and associativity rules.
3069 Full disassembler support for the symbolic expressions is provided, and
3070 creates an automatic migration path for existing ASL code to ASL+ code
3071 via the disassembly process. By default, the disassembler now emits ASL+
3072 code with symbolic expressions. An option (-dl) is provided to force the
3073 disassembler to emit legacy ASL code if desired.
3075 Below is the complete list of the currently supported symbolic operators
3076 with examples. See the iASL User Guide for additional information.
3079 ASL+ Syntax Legacy ASL Equivalent
3080 ----------- ---------------------
3084 Z = X + Y Add (X, Y, Z)
3085 Z = X - Y Subtract (X, Y, Z)
3086 Z = X * Y Multiply (X, Y, Z)
3087 Z = X / Y Divide (X, Y, , Z)
3088 Z = X % Y Mod (X, Y, Z)
3089 Z = X << Y ShiftLeft (X, Y, Z)
3090 Z = X >> Y ShiftRight (X, Y, Z)
3091 Z = X & Y And (X, Y, Z)
3092 Z = X | Y Or (X, Y, Z)
3093 Z = X ^ Y Xor (X, Y, Z)
3098 // Logical operators
3100 (X == Y) LEqual (X, Y)
3101 (X != Y) LNotEqual (X, Y)
3102 (X < Y) LLess (X, Y)
3103 (X > Y) LGreater (X, Y)
3104 (X <= Y) LLessEqual (X, Y)
3105 (X >= Y) LGreaterEqual (X, Y)
3106 (X && Y) LAnd (X, Y)
3110 // Assignment and compound assignment operations
3113 X += Y Add (X, Y, X)
3114 X -= Y Subtract (X, Y, X)
3115 X *= Y Multiply (X, Y, X)
3116 X /= Y Divide (X, Y, , X)
3117 X %= Y Mod (X, Y, X)
3118 X <<= Y ShiftLeft (X, Y, X)
3119 X >>= Y ShiftRight (X, Y, X)
3120 X &= Y And (X, Y, X)
3122 X ^= Y Xor (X, Y, X)
3129 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
3130 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
3132 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
3134 And (MEMB, 0xFFFFFFF0, SRMB)
3135 Store (MEMB, Local2)
3136 Store (PDBM, Local1)
3137 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
3139 Or (PDBM, 0x02, PDBM)
3143 If (((R510 & 0x03FB) == 0x02E0) ||
3144 ((R520 & 0x03FB) == 0x02E0) ||
3145 ((R530 & 0x03FB) == 0x02E0) ||
3146 ((R540 & 0x03FB) == 0x02E0))
3148 SRMB = (MEMB & 0xFFFFFFF0)
3151 PDBM &= 0xFFFFFFFFFFFFFFF9
3157 Store (0x1234, Local1)
3158 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
3159 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
3160 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
3161 Store (Index (PKG1, 0x03), Local6)
3162 Store (Add (Local3, Local2), Debug)
3163 Add (Local1, 0x0F, Local2)
3164 Add (Local1, Multiply (Local2, Local3), Local2)
3165 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
3169 Local3 = (((Local1 + TEST) + 0x20) * Local2)
3170 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
3171 Local3 = (Local1 + (TEST + (0x20 * Local2)))
3172 Local6 = Index (PKG1, 0x03)
3173 Debug = (Local3 + Local2)
3174 Local2 = (Local1 + 0x0F)
3175 Local2 = (Local1 + (Local2 * Local3))
3176 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
3179 ----------------------------------------
3180 26 September 2014. Summary of changes for version 20140926:
3182 1) ACPICA kernel-resident subsystem:
3184 Updated the GPIO operation region handler interface (GeneralPurposeIo).
3185 In order to support GPIO Connection objects with multiple pins, along
3186 with the related Field objects, the following changes to the interface
3187 have been made: The Address is now defined to be the offset in bits of
3188 the field unit from the previous invocation of a Connection. It can be
3189 viewed as a "Pin Number Index" into the connection resource descriptor.
3190 The BitWidth is the exact bit width of the field. It is usually one bit,
3191 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
3192 additional information and examples.
3194 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
3195 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
3196 by the firmware), so that they cannot fire until they are enabled via
3197 AcpiUpdateAllGpes. Rafael J. Wysocki.
3199 Added a new return flag for the Event/GPE status interfaces --
3200 AcpiGetEventStatus and AcpiGetGpeStatus. The new
3201 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
3202 GPE currently has a handler associated with it, and can thus actually
3203 affect the system. Lv Zheng.
3205 Example Code and Data Size: These are the sizes for the OS-independent
3206 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3207 debug version of the code includes the debug output trace mechanism and
3208 has a much larger code and data size.
3211 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
3212 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
3214 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3215 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3217 2) iASL Compiler/Disassembler and Tools:
3219 iASL: Fixed a memory allocation/free regression introduced in 20140828
3220 that could cause the compiler to crash. This was introduced inadvertently
3221 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
3224 iASL: Removed two error messages that have been found to create false
3225 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
3226 1) Illegal forward reference within a method
3227 2) Illegal reference across two methods
3229 iASL: Implemented a new option (-lm) to create a hardware mapping file
3230 that summarizes all GPIO, I2C, SPI, and UART connections. This option
3231 works for both the compiler and disassembler. See the iASL compiler user
3232 guide for additional information and examples (section 6.4.6).
3234 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
3235 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
3236 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
3238 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
3239 unless STDIN is actually a terminal. Assists with batch-mode processing.
3242 Disassembler/AcpiHelp: Added another large group of recognized _HID
3246 ----------------------------------------
3247 28 August 2014. Summary of changes for version 20140828:
3249 1) ACPICA kernel-resident subsystem:
3251 Fixed a problem related to the internal use of the Timer() operator where
3252 a 64-bit divide could cause an attempted link to a double-precision math
3253 library. This divide is not actually necessary, so the code was
3254 restructured to eliminate it. Lv Zheng.
3256 ACPI 5.1: Added support for the runtime validation of the _DSD package
3257 (similar to the iASL support).
3259 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
3260 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
3262 Example Code and Data Size: These are the sizes for the OS-independent
3263 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3264 debug version of the code includes the debug output trace mechanism and
3265 has a much larger code and data size.
3268 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3269 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3271 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
3272 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3274 2) iASL Compiler/Disassembler and Tools:
3276 AcpiExec: Fixed a problem on unix systems where the original terminal
3277 state was not always properly restored upon exit. Seen when using the -v
3278 option. ACPICA BZ 1104.
3280 iASL: Fixed a problem with the validation of the ranges/length within the
3281 Memory24 resource descriptor. There was a boundary condition when the
3282 range was equal to the (length -1) caused by the fact that these values
3283 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
3285 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
3287 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
3289 now supported properly.
3291 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
3292 in the disassembler, data table compiler, and table template generator.
3294 iASL: Added a requirement for Device() objects that one of either a _HID
3295 or _ADR must exist within the scope of a Device, as per the ACPI
3296 specification. Remove a similar requirement that was incorrectly in place
3297 for the _DSD object.
3299 iASL: Added error detection for illegal named references within control
3300 methods that would cause runtime failures. Now trapped as errors are: 1)
3301 References to objects within a non-parent control method. 2) Forward
3302 references (within a method) -- for control methods, AML interpreters use
3303 a one-pass parse of control methods. ACPICA BZ 1008.
3305 iASL: Added error checking for dependencies related to the _PSx power
3306 methods. ACPICA BZ 1029.
3307 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
3309 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
3312 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
3313 deploying the existing object and string caches and adding new caches for
3316 iASL: Split the huge parser source file into multiple subfiles to improve
3317 manageability. Generation now requires the M4 macro preprocessor, which
3318 is part of the Bison distribution on both unix and windows platforms.
3320 AcpiSrc: Fixed and removed all extraneous warnings generated during
3321 entire ACPICA source code scan and/or conversion.
3324 ----------------------------------------
3326 24 July 2014. Summary of changes for version 20140724:
3328 The ACPI 5.1 specification has been released and is available at:
3329 http://uefi.org/specs/access
3332 0) ACPI 5.1 support in ACPICA:
3334 ACPI 5.1 is fully supported in ACPICA as of this release.
3336 New predefined names. Support includes iASL and runtime ACPICA
3338 _CCA (Cache Coherency Attribute).
3339 _DSD (Device-Specific Data). David Box.
3341 Modifications to existing ACPI tables. Support includes headers, iASL
3342 Data Table compiler, disassembler, and the template generator.
3343 FADT - New fields and flags. Graeme Gregory.
3344 GTDT - One new subtable and new fields. Tomasz Nowicki.
3345 MADT - Two new subtables. Tomasz Nowicki.
3346 PCCT - One new subtable.
3349 New notification type for System Resource Affinity change events.
3352 1) ACPICA kernel-resident subsystem:
3354 Fixed a regression introduced in 20140627 where a fault can happen during
3355 the deletion of Alias AML namespace objects. The problem affected both
3356 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
3358 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
3359 simple mechanism to enable wake GPEs that have no associated handler or
3360 control method. Rafael Wysocki.
3362 Updated the AcpiEnableGpe interface to disallow the enable if there is no
3363 handler or control method associated with the particular GPE. This will
3364 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
3366 Updated GPE handling and dispatch by disabling the GPE before clearing
3367 the status bit for edge-triggered GPEs. Lv Zheng.
3369 Added Timer() support to the AML Debug object. The current timer value is
3370 now displayed with each invocation of (Store to) the debug object to
3371 enable simple generation of execution times for AML code (method
3372 execution for example.) ACPICA BZ 1093.
3374 Example Code and Data Size: These are the sizes for the OS-independent
3375 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3376 debug version of the code includes the debug output trace mechanism and
3377 has a much larger code and data size.
3380 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
3381 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3383 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3384 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3387 2) iASL Compiler/Disassembler and Tools:
3389 Fixed an issue with the recently added local printf implementation,
3390 concerning width/precision specifiers that could cause incorrect output.
3391 Lv Zheng. ACPICA BZ 1094.
3393 Disassembler: Added support to detect buffers that contain UUIDs and
3394 disassemble them to an invocation of the ToUUID operator. Also emit
3395 commented descriptions of known ACPI-related UUIDs.
3397 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
3398 -u. Adds three new files.
3400 iASL: Update table compiler and disassembler for DMAR table changes that
3401 were introduced in September 2013. With assistance by David Woodhouse.
3403 ----------------------------------------
3404 27 June 2014. Summary of changes for version 20140627:
3406 1) ACPICA kernel-resident subsystem:
3408 Formatted Output: Implemented local versions of standard formatted output
3409 utilities such as printf, etc. Over time, it has been discovered that
3410 there are in fact many portability issues with printf, and the addition
3411 of this feature will fix/prevent these issues once and for all. Some
3412 known issues are summarized below:
3414 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
3415 for the Linux kernel and is %uI64 for some MSVC versions.
3416 2) Invoking printf consistently in a manner that is portable across both
3417 32-bit and 64-bit platforms is difficult at best in many situations.
3418 3) The output format for pointers varies from system to system (leading
3419 zeros especially), and leads to inconsistent output from ACPICA across
3421 4) Certain platform-specific printf formats may conflict with ACPICA use.
3422 5) If there is no local C library available, ACPICA now has local support
3425 -- To address these printf issues in a complete manner, ACPICA now
3426 directly implements a small subset of printf format specifiers, only
3427 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
3429 Implemented support for ACPICA generation within the EFI environment.
3430 Initially, the AcpiDump utility is supported in the UEFI shell
3431 environment. Lv Zheng.
3433 Added a new external interface, AcpiLogError, to improve ACPICA
3434 portability. This allows the host to redirect error messages from the
3435 ACPICA utilities. Lv Zheng.
3437 Added and deployed new OSL file I/O interfaces to improve ACPICA
3445 There are C library implementations of these functions in the new file
3446 service_layers/oslibcfs.c -- however, the functions can be implemented by
3447 the local host in any way necessary. Lv Zheng.
3449 Implemented a mechanism to disable/enable ACPI table checksum validation
3450 at runtime. This can be useful when loading tables very early during OS
3451 initialization when it may not be possible to map the entire table in
3452 order to compute the checksum. Lv Zheng.
3454 Fixed a buffer allocation issue for the Generic Serial Bus support.
3455 Originally, a fixed buffer length was used. This change allows for
3456 variable-length buffers based upon the protocol indicated by the field
3457 access attributes. Reported by Lan Tianyu. Lv Zheng.
3459 Fixed a problem where an object detached from a namespace node was not
3460 properly terminated/cleared and could cause a circular list problem if
3461 reattached. ACPICA BZ 1063. David Box.
3463 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
3465 Fixed a possible memory leak in an error return path within the function
3466 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
3468 Example Code and Data Size: These are the sizes for the OS-independent
3469 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3470 debug version of the code includes the debug output trace mechanism and
3471 has a much larger code and data size.
3474 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3475 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3477 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3478 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3481 2) iASL Compiler/Disassembler and Tools:
3483 Disassembler: Add dump of ASCII equivalent text within a comment at the
3484 end of each line of the output for the Buffer() ASL operator.
3486 AcpiDump: Miscellaneous changes:
3487 Fixed repetitive table dump in -n mode.
3488 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
3489 the ACPI 2.0 GUID fails.
3491 iASL: Fixed a problem where the compiler could fault if incorrectly given
3492 an acpidump output file as input. ACPICA BZ 1088. David Box.
3494 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
3495 they are invoked without any arguments.
3497 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
3498 1086. Colin Ian King.
3500 Disassembler: Cleaned up a block of code that extracts a parent Op
3501 object. Added a comment that explains that the parent is guaranteed to be
3502 valid in this case. ACPICA BZ 1069.
3505 ----------------------------------------
3506 24 April 2014. Summary of changes for version 20140424:
3508 1) ACPICA kernel-resident subsystem:
3510 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
3511 Some of these tables are known to contain a trailing NULL entry. Lv
3514 Removed an extraneous error message for the case where there are a large
3515 number of system GPEs (> 124). This was the "32-bit FADT register is too
3516 long to convert to GAS struct" message, which is irrelevant for GPEs
3517 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
3518 (limited capacity) GAS bit length. Also, several changes to ensure proper
3519 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
3522 Implemented and deployed additional configuration support for the public
3523 ACPICA external interfaces. Entire classes of interfaces can now be
3524 easily modified or configured out, replaced by stubbed inline functions
3525 by default. Lv Zheng.
3527 Moved all public ACPICA runtime configuration globals to the public
3528 ACPICA external interface file for convenience. Also, removed some
3529 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
3531 Documentation: Added a new section to the ACPICA reference describing the
3532 maximum number of GPEs that can be supported by the FADT-defined GPEs in
3533 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
3536 Example Code and Data Size: These are the sizes for the OS-independent
3537 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3538 debug version of the code includes the debug output trace mechanism and
3539 has a much larger code and data size.
3542 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3543 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3545 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3546 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3549 2) iASL Compiler/Disassembler and Tools:
3551 iASL and disassembler: Add full support for the LPIT table (Low Power
3552 Idle Table). Includes support in the disassembler, data table compiler,
3553 and template generator.
3556 1) Add option to force the use of the RSDT (over the XSDT).
3557 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
3559 iASL: Add check for predefined packages that are too large. For
3560 predefined names that contain subpackages, check if each subpackage is
3561 too large. (Check for too small already exists.)
3563 Debugger: Updated the GPE command (which simulates a GPE by executing the
3564 GPE code paths in ACPICA). The GPE device is now optional, and defaults
3565 to the GPE 0/1 FADT-defined blocks.
3567 Unix application OSL: Update line-editing support. Add additional error
3568 checking and take care not to reset terminal attributes on exit if they
3569 were never set. This should help guarantee that the terminal is always
3570 left in the previous state on program exit.
3573 ----------------------------------------
3574 25 March 2014. Summary of changes for version 20140325:
3576 1) ACPICA kernel-resident subsystem:
3578 Updated the auto-serialize feature for control methods. This feature
3579 automatically serializes all methods that create named objects in order
3580 to prevent runtime errors. The update adds support to ignore the
3581 currently executing AML SyncLevel when invoking such a method, in order
3582 to prevent disruption of any existing SyncLevel priorities that may exist
3583 in the AML code. Although the use of SyncLevels is relatively rare, this
3584 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
3585 appear on some machines starting with the 20140214 release.
3587 Added a new external interface to allow the host to install ACPI tables
3588 very early, before the namespace is even created. AcpiInstallTable gives
3589 the host additional flexibility for ACPI table management. Tables can be
3590 installed directly by the host as if they had originally appeared in the
3591 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
3592 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
3593 with additional internal restructuring and cleanup. See the ACPICA
3594 Reference for interface details. Lv Zheng.
3596 Added validation of the checksum for all incoming dynamically loaded
3597 tables (via external interfaces or via AML Load/LoadTable operators). Lv
3600 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
3601 and GPE handler removal. Restructured calls to eliminate possible race
3602 conditions. Lv Zheng.
3604 Added a warning for the use/execution of the ASL/AML Unload (table)
3605 operator. This will help detect and identify machines that use this
3606 operator if and when it is ever used. This operator has never been seen
3607 in the field and the usage model and possible side-effects of the drastic
3608 runtime action of a full table removal are unknown.
3610 Reverted the use of #pragma push/pop which was introduced in the 20140214
3611 release. It appears that push and pop are not implemented by enough
3612 compilers to make the use of this feature feasible for ACPICA at this
3613 time. However, these operators may be deployed in a future ACPICA
3616 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
3619 Source code generation:
3620 1) Disabled the use of the "strchr" macro for the gcc-specific
3621 generation. For some versions of gcc, this macro can periodically expose
3622 a compiler bug which in turn causes compile-time error(s).
3623 2) Added support for PPC64 compilation. Colin Ian King.
3625 Example Code and Data Size: These are the sizes for the OS-independent
3626 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3627 debug version of the code includes the debug output trace mechanism and
3628 has a much larger code and data size.
3631 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3632 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3634 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3635 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3638 2) iASL Compiler/Disassembler and Tools:
3640 Disassembler: Added several new features to improve the readability of
3641 the resulting ASL code. Extra information is emitted within comment
3642 fields in the ASL code:
3643 1) Known _HID/_CID values are decoded to descriptive text.
3644 2) Standard values for the Notify() operator are decoded to descriptive
3646 3) Target operands are expanded to full pathnames (in a comment) when
3649 Disassembler: Miscellaneous updates for extern() handling:
3650 1) Abort compiler if file specified by -fe option does not exist.
3651 2) Silence unnecessary warnings about argument count mismatches.
3652 3) Update warning messages concerning unresolved method externals.
3653 4) Emit "UnknownObj" keyword for externals whose type cannot be
3657 1) Added the -a option to display both the ASL syntax and the AML
3658 encoding for an input ASL operator. This effectively displays all known
3659 information about an ASL operator with one AcpiHelp invocation.
3660 2) Added substring match support (similar to a wildcard) for the -i
3661 (_HID/PNP IDs) option.
3663 iASL/Disassembler: Since this tool does not yet support execution on big-
3664 endian machines, added detection of endianness and an error message if
3665 execution is attempted on big-endian. Support for big-endian within iASL
3666 is a feature that is on the ACPICA to-be-done list.
3669 1) Remove option to extract binary files from an acpidump; this function
3670 is made obsolete by the AcpiXtract utility.
3671 2) General cleanup of open files and allocated buffers.
3674 ----------------------------------------
3675 14 February 2014. Summary of changes for version 20140214:
3677 1) ACPICA kernel-resident subsystem:
3679 Implemented a new mechanism to proactively prevent problems with ill-
3680 behaved reentrant control methods that create named ACPI objects. This
3681 behavior is illegal as per the ACPI specification, but is nonetheless
3682 frequently seen in the field. Previously, this could lead to an
3683 AE_ALREADY_EXISTS exception if the method was actually entered by more
3684 than one thread. This new mechanism detects such methods at table load
3685 time and marks them "serialized" to prevent reentrancy. A new global
3686 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
3687 feature if desired. This mechanism and global option obsoletes and
3688 supersedes the previous AcpiGbl_SerializeAllMethods option.
3690 Added the "Windows 2013" string to the _OSI support. ACPICA will now
3691 respond TRUE to _OSI queries with this string. It is the stated policy of
3692 ACPICA to add new strings to the _OSI support as soon as possible after
3693 they are defined. See the full ACPICA _OSI policy which has been added to
3694 the utilities/utosi.c file.
3696 Hardened/updated the _PRT return value auto-repair code:
3697 1) Do not abort the repair on a single subpackage failure, continue to
3698 check all subpackages.
3699 2) Add check for the minimum subpackage length (4).
3700 3) Properly handle extraneous NULL package elements.
3702 Added support to avoid the possibility of infinite loops when traversing
3703 object linked lists. Never allow an infinite loop, even in the face of
3704 corrupted object lists.
3706 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
3707 pack(pop) directives to ensure that the ACPICA headers are independent of
3708 compiler settings or other host headers.
3710 Example Code and Data Size: These are the sizes for the OS-independent
3711 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3712 debug version of the code includes the debug output trace mechanism and
3713 has a much larger code and data size.
3716 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3717 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3719 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3720 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3723 2) iASL Compiler/Disassembler and Tools:
3725 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
3726 first reserved field was incorrectly forced to have a value of zero. This
3727 change correctly forces the field to have a value of one. ACPICA BZ 1081.
3729 Debugger: Added missing support for the "Extra" and "Data" subobjects
3730 when displaying object data.
3732 Debugger: Added support to display entire object linked lists when
3733 displaying object data.
3735 iASL: Removed the obsolete -g option to obtain ACPI tables from the
3736 Windows registry. This feature has been superseded by the acpidump
3740 ----------------------------------------
3741 14 January 2014. Summary of changes for version 20140114:
3743 1) ACPICA kernel-resident subsystem:
3745 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3746 copyright to all module headers and signons, including the standard Linux
3747 header. This affects virtually every file in the ACPICA core subsystem,
3748 iASL compiler, all ACPICA utilities, and the test suites.
3750 Improved parameter validation for AcpiInstallGpeBlock. Added the
3752 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
3753 2) There is not already a GPE block attached to the device.
3754 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
3757 Correctly support "references" in the ACPI_OBJECT. This change fixes the
3758 support to allow references (namespace nodes) to be passed as arguments
3759 to control methods via the evaluate object interface. This is probably
3760 most useful for testing purposes, however.
3762 Improved support for 32/64 bit physical addresses in printf()-like
3763 output. This change improves the support for physical addresses in printf
3764 debug statements and other output on both 32-bit and 64-bit hosts. It
3765 consistently outputs the appropriate number of bytes for each host. The
3766 %p specifier is unsatisfactory since it does not emit uniform output on
3767 all hosts/clib implementations (on some, leading zeros are not supported,
3768 leading to difficult-to-read output).
3770 Example Code and Data Size: These are the sizes for the OS-independent
3771 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3772 debug version of the code includes the debug output trace mechanism and
3773 has a much larger code and data size.
3776 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3777 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3779 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3780 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3783 2) iASL Compiler/Disassembler and Tools:
3785 iASL: Fix a possible fault when using the Connection() operator. Fixes a
3786 problem if the parent Field definition for the Connection operator refers
3787 to an operation region that does not exist. ACPICA BZ 1064.
3789 AcpiExec: Load of local test tables is now optional. The utility has the
3790 capability to load some various tables to test features of ACPICA.
3791 However, there are enough of them that the output of the utility became
3792 confusing. With this change, only the required local tables are displayed
3793 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
3794 line specification. This makes the default output simler and easier to
3795 understand. The -el command line option restores the original behavior
3796 for testing purposes.
3798 AcpiExec: Added support for overlapping operation regions. This change
3799 expands the simulation of operation regions by supporting regions that
3800 overlap within the given address space. Supports SystemMemory and
3801 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
3803 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
3804 allows AcpiExec to simulate these address spaces, similar to the current
3805 support for SystemMemory and SystemIO.
3807 Debugger: Added new command to read/write/compare all namespace objects.
3808 The command "test objects" will exercise the entire namespace by writing
3809 new values to each data object, and ensuring that the write was
3810 successful. The original value is then restored and verified.
3812 Debugger: Added the "test predefined" command. This change makes this
3813 test public and puts it under the new "test" command. The test executes
3814 each and every predefined name within the current namespace.
3817 ----------------------------------------
3818 18 December 2013. Summary of changes for version 20131218:
3820 Global note: The ACPI 5.0A specification was released this month. There
3821 are no changes needed for ACPICA since this release of ACPI is an
3822 errata/clarification release. The specification is available at
3826 1) ACPICA kernel-resident subsystem:
3828 Added validation of the XSDT root table if it is present. Some older
3829 platforms contain an XSDT that is ill-formed or otherwise invalid (such
3830 as containing some or all entries that are NULL pointers). This change
3831 adds a new function to validate the XSDT before actually using it. If the
3832 XSDT is found to be invalid, ACPICA will now automatically fall back to
3833 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
3834 ACPICA and enhanced by Lv Zheng and Bob Moore.
3836 Added a runtime option to ignore the XSDT and force the use of the RSDT.
3837 This change adds a runtime option that will force ACPICA to use the RSDT
3838 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
3839 requires that an XSDT be used instead of the RSDT, the XSDT has been
3840 found to be corrupt or ill-formed on some machines. Lv Zheng.
3842 Added a runtime option to favor 32-bit FADT register addresses over the
3843 64-bit addresses. This change adds an option to favor 32-bit FADT
3844 addresses when there is a conflict between the 32-bit and 64-bit versions
3845 of the same register. The default behavior is to use the 64-bit version
3846 in accordance with the ACPI specification. This can now be overridden via
3847 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
3849 During the change above, the internal "Convert FADT" and "Verify FADT"
3850 functions have been merged to simplify the code, making it easier to
3851 understand and maintain. ACPICA BZ 933.
3853 Improve exception reporting and handling for GPE block installation.
3854 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
3855 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
3857 Added helper macros to extract bus/segment numbers from the HEST table.
3858 This change adds two macros to extract the encoded bus and segment
3859 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
3860 Betty Dall <betty.dall@hp.com>
3862 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
3863 by ACPICA. It is not a public macro, so it should have no effect on
3864 existing OSV code. Lv Zheng.
3866 Example Code and Data Size: These are the sizes for the OS-independent
3867 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3868 debug version of the code includes the debug output trace mechanism and
3869 has a much larger code and data size.
3872 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3873 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3875 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3876 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3879 2) iASL Compiler/Disassembler and Tools:
3881 Disassembler: Improved pathname support for emitted External()
3882 statements. This change adds full pathname support for external names
3883 that have been resolved internally by the inclusion of additional ACPI
3884 tables (via the iASL -e option). Without this change, the disassembler
3885 can emit multiple externals for the same object, or it become confused
3886 when the Scope() operator is used on an external object. Overall, greatly
3887 improves the ability to actually recompile the emitted ASL code when
3888 objects a referenced across multiple ACPI tables. Reported by Michael
3889 Tsirkin (mst@redhat.com).
3891 Tests/ASLTS: Updated functional control suite to execute with no errors.
3892 David Box. Fixed several errors related to the testing of the interpreter
3893 slack mode. Lv Zheng.
3895 iASL: Added support to detect names that are declared within a control
3896 method, but are unused (these are temporary names that are only valid
3897 during the time the method is executing). A remark is issued for these
3898 cases. ACPICA BZ 1022.
3900 iASL: Added full support for the DBG2 table. Adds full disassembler,
3901 table compiler, and template generator support for the DBG2 table (Debug
3904 iASL: Added full support for the PCCT table, update the table definition.
3905 Updates the PCCT table definition in the actbl3.h header and adds table
3906 compiler and template generator support.
3908 iASL: Added an option to emit only error messages (no warnings/remarks).
3909 The -ve option will enable only error messages, warnings and remarks are
3910 suppressed. This can simplify debugging when only the errors are
3911 important, such as when an ACPI table is disassembled and there are many
3912 warnings and remarks -- but only the actual errors are of real interest.
3914 Example ACPICA code (source/tools/examples): Updated the example code so
3915 that it builds to an actual working program, not just example code. Added
3916 ACPI tables and execution of an example control method in the DSDT. Added
3917 makefile support for Unix generation.
3920 ----------------------------------------
3921 15 November 2013. Summary of changes for version 20131115:
3923 This release is available at https://acpica.org/downloads
3926 1) ACPICA kernel-resident subsystem:
3928 Resource Manager: Fixed loop termination for the "get AML length"
3929 function. The loop previously had an error termination on a NULL resource
3930 pointer, which can never happen since the loop simply increments a valid
3931 resource pointer. This fix changes the loop to terminate with an error on
3932 an invalid end-of-buffer condition. The problem can be seen as an
3933 infinite loop by callers to AcpiSetCurrentResources with an invalid or
3934 corrupted resource descriptor, or a resource descriptor that is missing
3935 an END_TAG descriptor. Reported by Dan Carpenter
3936 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
3938 Table unload and ACPICA termination: Delete all attached data objects
3939 during namespace node deletion. This fix updates namespace node deletion
3940 to delete the entire list of attached objects (attached via
3941 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
3942 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
3944 ACPICA termination: Added support to delete all objects attached to the
3945 root namespace node. This fix deletes any and all objects that have been
3946 attached to the root node via AcpiAttachData. Previously, none of these
3947 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
3949 Debug output: Do not emit the function nesting level for the in-kernel
3950 build. The nesting level is really only useful during a single-thread
3951 execution. Therefore, only enable this output for the AcpiExec utility.
3952 Also, only emit the thread ID when executing under AcpiExec (Context
3953 switches are still always detected and a message is emitted). ACPICA BZ
3956 Example Code and Data Size: These are the sizes for the OS-independent
3957 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3958 debug version of the code includes the debug output trace mechanism and
3959 has a much larger code and data size.
3962 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3963 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3965 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3966 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3969 2) iASL Compiler/Disassembler and Tools:
3971 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
3972 correct portable POSIX header for terminal control functions.
3974 Disassembler: Fixed control method invocation issues related to the use
3975 of the CondRefOf() operator. The problem is seen in the disassembly where
3976 control method invocations may not be disassembled properly if the
3977 control method name has been used previously as an argument to CondRefOf.
3978 The solution is to not attempt to emit an external declaration for the
3979 CondRefOf target (it is not necessary in the first place). This prevents
3980 disassembler object type confusion. ACPICA BZ 988.
3982 Unix Makefiles: Added an option to disable compiler optimizations and the
3983 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
3984 with optimizations (reportedly, gcc 4.4 for example). This change adds a
3985 command line option for make (NOOPT) that disables all compiler
3986 optimizations and the _FORTIFY_SOURCE compiler flag. The default
3987 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
3988 1034. Lv Zheng, Bob Moore.
3990 Tests/ASLTS: Added options to specify individual test cases and modes.
3991 This allows testers running aslts.sh to optionally specify individual
3992 test modes and test cases. Also added an option to disable the forced
3993 generation of the ACPICA tools from source if desired. Lv Zheng.
3995 ----------------------------------------
3996 27 September 2013. Summary of changes for version 20130927:
3998 This release is available at https://acpica.org/downloads
4001 1) ACPICA kernel-resident subsystem:
4003 Fixed a problem with store operations to reference objects. This change
4004 fixes a problem where a Store operation to an ArgX object that contained
4006 reference to a field object did not complete the automatic dereference
4008 then write to the actual field object. Instead, the object type of the
4009 field object was inadvertently changed to match the type of the source
4010 operand. The new behavior will actually write to the field object (buffer
4011 field or field unit), thus matching the correct ACPI-defined behavior.
4013 Implemented support to allow the host to redefine individual OSL
4014 prototypes. This change enables the host to redefine OSL prototypes found
4015 in the acpiosxf.h file. This allows the host to implement OSL interfaces
4016 with a macro or inlined function. Further, it allows the host to add any
4017 additional required modifiers such as __iomem, __init, __exit, etc., as
4018 necessary on a per-interface basis. Enables maximum flexibility for the
4019 OSL interfaces. Lv Zheng.
4021 Hardcoded the access width for the FADT-defined reset register. The ACPI
4022 specification requires the reset register width to be 8 bits. ACPICA now
4023 hardcodes the width to 8 and ignores the FADT width value. This provides
4024 compatibility with other ACPI implementations that have allowed BIOS code
4025 with bad register width values to go unnoticed. Matthew Garett, Bob
4029 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
4031 in the OSL header (acpiosxf). The change modifies the position of this
4032 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
4033 build issues if the OSL defines the implementation of the interface to be
4034 an inline stub function. Lv Zheng.
4036 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
4037 initialization interfaces. This change adds a new macro for the main init
4038 and terminate external interfaces in order to support hosts that require
4039 additional or different processing for these functions. Changed from
4040 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
4043 Cleaned up the memory allocation macros for configurability. In the
4045 case, the ACPI_ALLOCATE and related macros now resolve directly to their
4046 respective AcpiOs* OSL interfaces. Two options:
4047 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
4048 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
4049 2) For AcpiExec (and for debugging), the macros can optionally be
4051 to the local ACPICA interfaces that track each allocation (local tracking
4052 is used to immediately detect memory leaks).
4055 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
4056 to predefine this macro to either TRUE or FALSE during the system build.
4058 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
4060 Example Code and Data Size: These are the sizes for the OS-independent
4061 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4062 debug version of the code includes the debug output trace mechanism and
4063 has a much larger code and data size.
4066 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4067 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4069 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4070 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4073 2) iASL Compiler/Disassembler and Tools:
4075 iASL: Implemented wildcard support for the -e option. This simplifies use
4076 when there are many SSDTs that must be included to resolve external
4078 declarations. ACPICA BZ 1041. Example:
4079 iasl -e ssdt*.dat -d dsdt.dat
4081 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
4082 adds a portable module that implements full history and limited line
4083 editing for Unix and Linux systems. It does not use readline() due to
4084 portability issues. Instead it uses the POSIX termio interface to put the
4085 terminal in raw input mode so that the various special keys can be
4087 (such as up/down-arrow for history support and left/right-arrow for line
4088 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
4090 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
4091 one or more spaces. This provides compatible with early or different
4092 versions of the AcpiDump utility. ACPICA BZ 1044.
4094 AcpiDump: Do not ignore tables that contain only an ACPI table header.
4095 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
4096 no other data. This change adds support to dump these tables. Any tables
4097 shorter than the length of an ACPI table header remain in error (an error
4098 message is emitted). Reported by Yi Li.
4100 Debugger: Echo actual command along with the "unknown command" message.
4102 ----------------------------------------
4103 23 August 2013. Summary of changes for version 20130823:
4105 1) ACPICA kernel-resident subsystem:
4107 Implemented support for host-installed System Control Interrupt (SCI)
4108 handlers. Certain ACPI functionality requires the host to handle raw
4109 SCIs. For example, the "SCI Doorbell" that is defined for memory power
4110 state support requires the host device driver to handle SCIs to examine
4111 if the doorbell has been activated. Multiple SCI handlers can be
4112 installed to allow for future expansion. New external interfaces are
4113 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
4114 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
4116 Operation region support: Never locally free the handler "context"
4117 pointer. This change removes some dangerous code that attempts to free
4118 the handler context pointer in some (rare) circumstances. The owner of
4119 the handler owns this pointer and the ACPICA code should never touch it.
4120 Although not seen to be an issue in any kernel, it did show up as a
4121 problem (fault) under AcpiExec. Also, set the internal storage field for
4122 the context pointer to zero when the region is deactivated, simply for
4123 sanity. David Box. ACPICA BZ 1039.
4125 AcpiRead: On error, do not modify the return value target location. If an
4126 error happens in the middle of a split 32/32 64-bit I/O operation, do not
4127 modify the target of the return value pointer. Makes the code consistent
4128 with the rest of ACPICA. Bjorn Helgaas.
4130 Example Code and Data Size: These are the sizes for the OS-independent
4131 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4132 debug version of the code includes the debug output trace mechanism and
4133 has a much larger code and data size.
4136 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4137 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4139 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4140 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
4143 2) iASL Compiler/Disassembler and Tools:
4145 AcpiDump: Implemented several new features and fixed some problems:
4146 1) Added support to dump the RSDP, RSDT, and XSDT tables.
4147 2) Added support for multiple table instances (SSDT, UEFI).
4148 3) Added option to dump "customized" (overridden) tables (-c).
4149 4) Fixed a problem where some table filenames were improperly
4151 5) Improved some error messages, removed some unnecessary messages.
4153 iASL: Implemented additional support for disassembly of ACPI tables that
4154 contain invocations of external control methods. The -fe<file> option
4155 allows the import of a file that specifies the external methods along
4156 with the required number of arguments for each -- allowing for the
4157 correct disassembly of the table. This is a workaround for a limitation
4158 of AML code where the disassembler often cannot determine the number of
4159 arguments required for an external control method and generates incorrect
4160 ASL code. See the iASL reference for details. ACPICA BZ 1030.
4162 Debugger: Implemented a new command (paths) that displays the full
4163 pathnames (namepaths) and object types of all objects in the namespace.
4164 This is an alternative to the namespace command.
4166 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
4167 mechanism and any installed handlers.
4169 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
4170 This can occur if there are too many parent prefixes in a namepath (for
4171 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
4173 Application OSLs: Set the return value for the PCI read functions. These
4174 functions simply return AE_OK, but should set the return value to zero
4175 also. This change implements this. ACPICA BZ 1038.
4177 Debugger: Prevent possible command line buffer overflow. Increase the
4178 size of a couple of the debugger line buffers, and ensure that overflow
4179 cannot happen. ACPICA BZ 1037.
4181 iASL: Changed to abort immediately on serious errors during the parsing
4182 phase. Due to the nature of ASL, there is no point in attempting to
4183 compile these types of errors, and they typically end up causing a
4184 cascade of hundreds of errors which obscure the original problem.
4186 ----------------------------------------
4187 25 July 2013. Summary of changes for version 20130725:
4189 1) ACPICA kernel-resident subsystem:
4191 Fixed a problem with the DerefOf operator where references to FieldUnits
4192 and BufferFields incorrectly returned the parent object, not the actual
4193 value of the object. After this change, a dereference of a FieldUnit
4194 reference results in a read operation on the field to get the value, and
4195 likewise, the appropriate BufferField value is extracted from the target
4198 Fixed a problem where the _WAK method could cause a fault under these
4199 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
4200 method returned no value. The problem is rarely seen because most kernels
4201 run ACPICA in slack mode.
4203 For the DerefOf operator, a fatal error now results if an attempt is made
4204 to dereference a reference (created by the Index operator) to a NULL
4205 package element. Provides compatibility with other ACPI implementations,
4206 and this behavior will be added to a future version of the ACPI
4209 The ACPI Power Management Timer (defined in the FADT) is now optional.
4210 This provides compatibility with other ACPI implementations and will
4211 appear in the next version of the ACPI specification. If there is no PM
4212 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
4213 zero in the FADT indicates no PM timer.
4215 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
4216 allows the host to globally enable/disable all vendor strings, all
4217 feature strings, or both. Intended to be primarily used for debugging
4218 purposes only. Lv Zheng.
4220 Expose the collected _OSI data to the host via a global variable. This
4221 data tracks the highest level vendor ID that has been invoked by the BIOS
4222 so that the host (and potentially ACPICA itself) can change behaviors
4223 based upon the age of the BIOS.
4225 Example Code and Data Size: These are the sizes for the OS-independent
4226 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4227 debug version of the code includes the debug output trace mechanism and
4228 has a much larger code and data size.
4231 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4232 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4234 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4235 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4238 2) iASL Compiler/Disassembler and Tools:
4240 iASL: Created the following enhancements for the -so option (create
4242 1)Add offsets for the last nameseg in each namepath for every supported
4244 2)Add support for Processor, Device, Thermal Zone, and Scope objects
4245 3)Add the actual AML opcode for the parent object of every supported
4247 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
4249 Disassembler: Emit all unresolved external symbols in a single block.
4250 These are external references to control methods that could not be
4251 resolved, and thus, the disassembler had to make a guess at the number of
4254 iASL: The argument to the -T option (create table template) is now
4255 optional. If not specified, the default table is a DSDT, typically the
4258 ----------------------------------------
4259 26 June 2013. Summary of changes for version 20130626:
4261 1) ACPICA kernel-resident subsystem:
4263 Fixed an issue with runtime repair of the _CST object. Null or invalid
4264 elements were not always removed properly. Lv Zheng.
4266 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
4267 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
4268 the maximum number of GPEs is 1016. Use of multiple GPE block devices
4269 makes the system-wide number of GPEs essentially unlimited.
4271 Example Code and Data Size: These are the sizes for the OS-independent
4272 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4273 debug version of the code includes the debug output trace mechanism and
4274 has a much larger code and data size.
4277 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4278 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4280 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4281 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4284 2) iASL Compiler/Disassembler and Tools:
4286 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
4287 hosts. Now supports Linux, FreeBSD, and Windows.
4289 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
4290 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
4292 iASL/Preprocessor: Implemented full support for nested
4293 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
4295 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
4296 max. The original purpose of this constraint was to limit the amount of
4297 debug output. However, the string function in question (UtPrintString) is
4298 now used for the disassembler also, where 256 bytes is insufficient.
4299 Reported by RehabMan@GitHub.
4301 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
4302 tables. ACPICA BZ 999. Lv Zheng.
4304 iASL: Fixed a couple of error exit issues that could result in a "Could
4305 not delete <file>" message during ASL compilation.
4307 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
4308 the actual signatures for these tables are "FACP" and "APIC",
4311 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
4312 tables are allowed to have multiple instances.
4314 ----------------------------------------
4315 17 May 2013. Summary of changes for version 20130517:
4317 1) ACPICA kernel-resident subsystem:
4319 Fixed a regression introduced in version 20130328 for _INI methods. This
4320 change fixes a problem introduced in 20130328 where _INI methods are no
4321 longer executed properly because of a memory block that was not
4322 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
4323 <tomasz.nowicki@linaro.org>.
4325 Fixed a possible problem with the new extended sleep registers in the
4327 5.0 FADT. Do not use these registers (even if populated) unless the HW-
4328 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
4331 Implemented return value repair code for _CST predefined objects: Sort
4333 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
4335 Implemented a debug-only option to disable loading of SSDTs from the
4336 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
4337 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
4338 acglobal.h - ACPICA BZ 1005. Lv Zheng.
4340 Fixed some issues in the ACPICA initialization and termination code:
4341 Tomasz Nowicki <tomasz.nowicki@linaro.org>
4342 1) Clear events initialized flag upon event component termination. ACPICA
4344 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
4345 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
4346 4) Clear debug buffer global on termination to prevent possible multiple
4347 delete. ACPICA BZ 1010.
4349 Standardized all switch() blocks across the entire source base. After
4351 years, different formatting for switch() had crept in. This change makes
4352 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
4354 Split some files to enhance ACPICA modularity and configurability:
4355 1) Split buffer dump routines into utilities/utbuffer.c
4356 2) Split internal error message routines into utilities/uterror.c
4357 3) Split table print utilities into tables/tbprint.c
4358 4) Split iASL command-line option processing into asloptions.c
4360 Makefile enhancements:
4361 1) Support for all new files above.
4362 2) Abort make on errors from any subcomponent. Chao Guan.
4363 3) Add build support for Apple Mac OS X. Liang Qi.
4365 Example Code and Data Size: These are the sizes for the OS-independent
4366 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4367 debug version of the code includes the debug output trace mechanism and
4368 has a much larger code and data size.
4371 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4372 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4374 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4375 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4378 2) iASL Compiler/Disassembler and Tools:
4380 New utility: Implemented an easily portable version of the acpidump
4381 utility to extract ACPI tables from the system (or a file) in an ASCII
4383 dump format. The top-level code implements the various command line
4384 options, file I/O, and table dump routines. To port to a new host, only
4385 three functions need to be implemented to get tables -- since this
4386 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
4387 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
4388 1) The Windows version obtains the ACPI tables from the Registry.
4389 2) The Linux version is under development.
4390 3) Other hosts - If an OS-dependent module is submitted, it will be
4391 distributed with ACPICA.
4393 iASL: Fixed a regression for -D preprocessor option (define symbol). A
4394 restructuring/change to the initialization sequence caused this option to
4395 no longer work properly.
4397 iASL: Implemented a mechanism to disable specific warnings and remarks.
4398 Adds a new command line option, "-vw <messageid> as well as "#pragma
4399 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
4401 iASL: Fix for too-strict package object validation. The package object
4402 validation for return values from the predefined names is a bit too
4403 strict, it does not allow names references within the package (which will
4404 be resolved at runtime.) These types of references cannot be validated at
4405 compile time. This change ignores named references within package objects
4406 for names that return or define static packages.
4408 Debugger: Fixed the 80-character command line limitation for the History
4409 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
4411 iASL: Added control method and package support for the -so option
4412 (generates AML offset table for BIOS support.)
4414 iASL: issue a remark if a non-serialized method creates named objects. If
4415 a thread blocks within the method for any reason, and another thread
4416 enters the method, the method will fail because an attempt will be made
4418 create the same (named) object twice. In this case, issue a remark that
4419 the method should be marked serialized. NOTE: may become a warning later.
4422 ----------------------------------------
4423 18 April 2013. Summary of changes for version 20130418:
4425 1) ACPICA kernel-resident subsystem:
4427 Fixed a possible buffer overrun during some rare but specific field unit
4428 read operations. This overrun can only happen if the DSDT version is 1 --
4429 meaning that all AML integers are 32 bits -- and the field length is
4430 between 33 and 55 bits long. During the read, an internal buffer object
4432 created for the field unit because the field is larger than an integer
4434 bits). However, in this case, the buffer will be incorrectly written
4435 beyond the end because the buffer length is less than the internal
4437 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
4438 long, but a full 8 bytes will be written.
4440 Updated the Embedded Controller "orphan" _REG method support. This refers
4441 to _REG methods under the EC device that have no corresponding operation
4442 region. This is allowed by the ACPI specification. This update removes a
4443 dependency on the existence an ECDT table. It will execute an orphan _REG
4444 method as long as the operation region handler for the EC is installed at
4445 the EC device node and not the namespace root. Rui Zhang (original
4446 update), Bob Moore (update/integrate).
4448 Implemented run-time argument typechecking for all predefined ACPI names
4449 (_STA, _BIF, etc.) This change performs object typechecking on all
4450 incoming arguments for all predefined names executed via
4451 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
4452 passing correct object types as well as the correct number of arguments
4453 (therefore identifying any issues immediately). Also, the ASL/namespace
4454 definition of the predefined name is checked against the ACPI
4455 specification for the proper argument count. Adds one new file,
4458 Changed an exception code for the ASL UnLoad() operator. Changed the
4459 exception code for the case where the input DdbHandle is invalid, from
4460 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
4462 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
4463 global makefile. The use of this flag causes compiler errors on earlier
4464 versions of GCC, so it has been removed for compatibility.
4466 Miscellaneous cleanup:
4467 1) Removed some unused/obsolete macros
4468 2) Fixed a possible memory leak in the _OSI support
4469 3) Removed an unused variable in the predefined name support
4470 4) Windows OSL: remove obsolete reference to a memory list field
4472 Example Code and Data Size: These are the sizes for the OS-independent
4473 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4474 debug version of the code includes the debug output trace mechanism and
4475 has a much larger code and data size.
4478 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4479 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4481 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4482 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4485 2) iASL Compiler/Disassembler and Tools:
4487 AcpiExec: Added installation of a handler for the SystemCMOS address
4488 space. This prevents control method abort if a method accesses this
4491 AcpiExec: Added support for multiple EC devices, and now install EC
4492 operation region handler(s) at the actual EC device instead of the
4493 namespace root. This reflects the typical behavior of host operating
4496 AcpiExec: Updated to ensure that all operation region handlers are
4497 installed before the _REG methods are executed. This prevents a _REG
4498 method from aborting if it accesses an address space has no handler.
4499 AcpiExec installs a handler for every possible address space.
4501 Debugger: Enhanced the "handlers" command to display non-root handlers.
4502 This change enhances the handlers command to display handlers associated
4503 with individual devices throughout the namespace, in addition to the
4504 currently supported display of handlers associated with the root
4508 ASL Test Suite: Several test suite errors have been identified and
4509 resolved, reducing the total error count during execution. Chao Guan.
4511 ----------------------------------------
4512 28 March 2013. Summary of changes for version 20130328:
4514 1) ACPICA kernel-resident subsystem:
4516 Fixed several possible race conditions with the internal object reference
4517 counting mechanism. Some of the external ACPICA interfaces update object
4518 reference counts without holding the interpreter or namespace lock. This
4519 change adds a spinlock to protect reference count updates on the internal
4520 ACPICA objects. Reported by and with assistance from Andriy Gapon
4523 FADT support: Removed an extraneous warning for very large GPE register
4524 sets. This change removes a size mismatch warning if the legacy length
4525 field for a GPE register set is larger than the 64-bit GAS structure can
4526 accommodate. GPE register sets can be larger than the 255-bit width
4527 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
4529 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
4530 return from this interface. Handles a possible timeout case if
4531 ACPI_WAIT_FOREVER is modified by the host to be a value less than
4532 "forever". Jung-uk Kim.
4534 Predefined name support: Add allowed/required argument type information
4536 the master predefined info table. This change adds the infrastructure to
4537 enable typechecking on incoming arguments for all predefined
4538 methods/objects. It does not actually contain the code that will fully
4539 utilize this information, this is still under development. Also condenses
4540 some duplicate code for the predefined names into a new module,
4541 utilities/utpredef.c
4543 Example Code and Data Size: These are the sizes for the OS-independent
4544 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4545 debug version of the code includes the debug output trace mechanism and
4546 has a much larger code and data size.
4549 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4550 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4552 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4553 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4556 2) iASL Compiler/Disassembler and Tools:
4558 iASL: Implemented a new option to simplify the development of ACPI-
4560 BIOS code. Adds support for a new "offset table" output file. The -so
4561 option will create a C table containing the AML table offsets of various
4562 named objects in the namespace so that BIOS code can modify them easily
4564 boot time. This can simplify BIOS runtime code by eliminating expensive
4565 searches for "magic values", enhancing boot times and adding greater
4566 reliability. With assistance from Lee Hamel.
4568 iASL: Allow additional predefined names to return zero-length packages.
4569 Now, all predefined names that are defined by the ACPI specification to
4570 return a "variable-length package of packages" are allowed to return a
4571 zero length top-level package. This allows the BIOS to tell the host that
4572 the requested feature is not supported, and supports existing BIOS/ASL
4575 iASL: Changed the "result not used" warning to an error. This is the case
4576 where an ASL operator is effectively a NOOP because the result of the
4577 operation is not stored anywhere. For example:
4579 There is no target (missing 3rd argument), nor is the function return
4580 value used. This is potentially a very serious problem -- since the code
4581 was probably intended to do something, but for whatever reason, the value
4582 was not stored. Therefore, this issue has been upgraded from a warning to
4585 AcpiHelp: Added allowable/required argument types to the predefined names
4586 info display. This feature utilizes the recent update to the predefined
4587 names table (above).
4589 ----------------------------------------
4590 14 February 2013. Summary of changes for version 20130214:
4592 1) ACPICA Kernel-resident Subsystem:
4594 Fixed a possible regression on some hosts: Reinstated the safe return
4595 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
4596 evaluated only once. Although these macros are not needed for the ACPICA
4597 code itself, they are often used by ACPI-related host device drivers
4599 the safe feature may be necessary.
4601 Fixed several issues related to the ACPI 5.0 reduced hardware support
4602 (SOC): Now ensure that if the platform declares itself as hardware-
4604 via the FADT, the following functions become NOOPs (and always return
4605 AE_OK) because ACPI is always enabled by definition on these machines:
4611 Dynamic Object Repair: Implemented additional runtime repairs for
4612 predefined name return values. Both of these repairs can simplify code in
4613 the related device drivers that invoke these methods:
4614 1) For the _STR and _MLS names, automatically repair/convert an ASCII
4615 string to a Unicode buffer.
4616 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
4618 lone end tag descriptor in the following cases: A Return(0) was executed,
4619 a null buffer was returned, or no object at all was returned (non-slack
4620 mode only). Adds a new file, nsconvert.c
4621 ACPICA BZ 998. Bob Moore, Lv Zheng.
4623 Resource Manager: Added additional code to prevent possible infinite
4625 while traversing corrupted or ill-formed resource template buffers. Check
4626 for zero-length resource descriptors in all code that loops through
4627 resource templates (the length field is used to index through the
4628 template). This change also hardens the external AcpiWalkResources and
4629 AcpiWalkResourceBuffer interfaces.
4631 Local Cache Manager: Enhanced the main data structure to eliminate an
4632 unnecessary mechanism to access the next object in the list. Actually
4633 provides a small performance enhancement for hosts that use the local
4634 ACPICA cache manager. Jung-uk Kim.
4636 Example Code and Data Size: These are the sizes for the OS-independent
4637 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4638 debug version of the code includes the debug output trace mechanism and
4639 has a much larger code and data size.
4642 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4643 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4645 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4646 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4649 2) iASL Compiler/Disassembler and Tools:
4651 iASL/Disassembler: Fixed several issues with the definition of the ACPI
4652 5.0 RASF table (RAS Feature Table). This change incorporates late changes
4653 that were made to the ACPI 5.0 specification.
4655 iASL/Disassembler: Added full support for the following new ACPI tables:
4656 1) The MTMR table (MID Timer Table)
4657 2) The VRTC table (Virtual Real Time Clock Table).
4658 Includes header file, disassembler, table compiler, and template support
4661 iASL: Implemented compile-time validation of package objects returned by
4662 predefined names. This new feature validates static package objects
4663 returned by the various predefined names defined to return packages. Both
4664 object types and package lengths are validated, for both parent packages
4665 and sub-packages, if any. The code is similar in structure and behavior
4667 the runtime repair mechanism within the AML interpreter and uses the
4668 existing predefined name information table. Adds a new file, aslprepkg.c.
4671 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
4672 This feature detects a binary file with a valid ACPI table header and
4673 invokes the disassembler automatically. Eliminates the need to
4674 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
4676 iASL/Disassembler: Added several warnings for the case where there are
4677 unresolved control methods during the disassembly. This can potentially
4678 cause errors when the output file is compiled, because the disassembler
4679 assumes zero method arguments in these cases (it cannot determine the
4680 actual number of arguments without resolution/definition of the method).
4682 Debugger: Added support to display all resources with a single command.
4683 Invocation of the resources command with no arguments will now display
4685 resources within the current namespace.
4687 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
4690 ----------------------------------------
4691 17 January 2013. Summary of changes for version 20130117:
4693 1) ACPICA Kernel-resident Subsystem:
4695 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
4696 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
4697 objects to return a package containing one integer, most BIOS code
4699 two integers and the previous code reflects that. However, we also need
4701 support BIOS code that actually implements to the ACPI spec, and this
4702 change reflects this.
4704 Fixed two issues with the ACPI_DEBUG_PRINT macros:
4705 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
4706 C compilers that require this support.
4707 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
4708 ACPI_DEBUG is already used by many of the various hosts.
4710 Updated all ACPICA copyrights and signons to 2013. Added the 2013
4711 copyright to all module headers and signons, including the standard Linux
4712 header. This affects virtually every file in the ACPICA core subsystem,
4713 iASL compiler, all ACPICA utilities, and the test suites.
4715 Example Code and Data Size: These are the sizes for the OS-independent
4716 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4717 debug version of the code includes the debug output trace mechanism and
4718 has a much larger code and data size.
4721 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4722 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4724 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4725 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4728 2) iASL Compiler/Disassembler and Tools:
4730 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
4731 prevent a possible fault on some hosts. Some C libraries modify the arg
4732 pointer parameter to vfprintf making it difficult to call it twice in the
4733 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
4734 does not affect the Windows OSL since the Win C library does not modify
4735 the arg pointer. Chao Guan, Bob Moore.
4737 iASL: Fixed a possible infinite loop when the maximum error count is
4738 reached. If an output file other than the .AML file is specified (such as
4739 a listing file), and the maximum number of errors is reached, do not
4740 attempt to flush data to the output file(s) as the compiler is aborting.
4741 This can cause an infinite loop as the max error count code essentially
4742 keeps calling itself.
4744 iASL/Disassembler: Added an option (-in) to ignore NOOP
4746 Implemented for both the compiler and the disassembler. Often, the NOOP
4747 opcode is used as padding for packages that are changed dynamically by
4749 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
4750 errors. This option causes the disassembler to ignore all NOOP opcodes
4751 (0xA3), and it also causes the compiler to ignore all ASL source code
4755 Debugger: Enhanced the Sleep command to execute all sleep states. This
4756 change allows Sleep to be invoked with no arguments and causes the
4757 debugger to execute all of the sleep states, 0-5, automatically.
4759 ----------------------------------------
4760 20 December 2012. Summary of changes for version 20121220:
4762 1) ACPICA Kernel-resident Subsystem:
4764 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
4765 alternate entry point for AcpiWalkResources and improves the usability of
4766 the resource manager by accepting as input a buffer containing the output
4767 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
4768 input buffer is not deleted by this interface so that it can be used by
4769 the host later. See the ACPICA reference for details.
4771 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
4772 (DSDT version < 2). The constant will be truncated and this warning
4773 reflects that behavior.
4775 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
4776 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
4777 both get and set the new wake bit in these descriptors, separately from
4778 the existing share bit. Reported by Aaron Lu.
4780 Interpreter: Fix Store() when an implicit conversion is not possible. For
4781 example, in the cases such as a store of a string to an existing package
4782 object, implement the store as a CopyObject(). This is a small departure
4783 from the ACPI specification which states that the control method should
4785 aborted in this case. However, the ASLTS suite depends on this behavior.
4787 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
4788 macros: check if debug output is currently enabled as soon as possible to
4789 minimize performance impact if debug is in fact not enabled.
4791 Source code restructuring: Cleanup to improve modularity. The following
4792 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
4793 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
4794 Associated makefiles and project files have been updated.
4796 Changed an exception code for LoadTable operator. For the case where one
4797 of the input strings is too long, change the returned exception code from
4798 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
4800 Fixed a possible memory leak in dispatcher error path. On error, delete
4801 the mutex object created during method mutex creation. Reported by
4802 tim.gardner@canonical.com.
4804 Example Code and Data Size: These are the sizes for the OS-independent
4805 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4806 debug version of the code includes the debug output trace mechanism and
4807 has a much larger code and data size.
4810 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4811 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4813 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4814 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4817 2) iASL Compiler/Disassembler and Tools:
4819 iASL: Disallow a method call as argument to the ObjectType ASL operator.
4820 This change tracks an errata to the ACPI 5.0 document. The AML grammar
4821 will not allow the interpreter to differentiate between a method and a
4822 method invocation when these are used as an argument to the ObjectType
4823 operator. The ACPI specification change is to disallow a method
4825 (UserTerm) for the ObjectType operator.
4827 Finish support for the TPM2 and CSRT tables in the headers, table
4828 compiler, and disassembler.
4830 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
4831 always expires immediately if the semaphore is not available. The
4833 code was using a relative-time timeout, but sem_timedwait requires the
4835 of an absolute time.
4837 iASL: Added a remark if the Timer() operator is used within a 32-bit
4838 table. This operator returns a 64-bit time value that will be truncated
4839 within a 32-bit table.
4841 iASL Source code restructuring: Cleanup to improve modularity. The
4842 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
4843 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
4847 ----------------------------------------
4848 14 November 2012. Summary of changes for version 20121114:
4850 1) ACPICA Kernel-resident Subsystem:
4852 Implemented a performance enhancement for ACPI/AML Package objects. This
4853 change greatly increases the performance of Package objects within the
4854 interpreter. It changes the processing of reference counts for packages
4856 optimizing for the most common case where the package sub-objects are
4857 either Integers, Strings, or Buffers. Increases the overall performance
4859 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
4861 Chao Guan. ACPICA BZ 943.
4863 Implemented and deployed common macros to extract flag bits from resource
4864 descriptors. Improves readability and maintainability of the code. Fixes
4866 problem with the UART serial bus descriptor for the number of data bits
4867 flags (was incorrectly 2 bits, should be 3).
4869 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
4870 of the macros and changed the SETx macros to the style of (destination,
4871 source). Also added ACPI_CASTx companion macros. Lv Zheng.
4873 Example Code and Data Size: These are the sizes for the OS-independent
4874 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4875 debug version of the code includes the debug output trace mechanism and
4876 has a much larger code and data size.
4879 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4880 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4882 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4883 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4886 2) iASL Compiler/Disassembler and Tools:
4888 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
4889 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
4890 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
4892 Disassembler: Fixed a problem with external declaration generation. Fixes
4893 a problem where an incorrect pathname could be generated for an external
4894 declaration if the original reference to the object includes leading
4895 carats (^). ACPICA BZ 984.
4897 Debugger: Completed a major update for the Disassemble<method> command.
4898 This command was out-of-date and did not properly disassemble control
4899 methods that had any reasonable complexity. This fix brings the command
4901 to the same level as the rest of the disassembler. Adds one new file,
4902 dmdeferred.c, which is existing code that is now common with the main
4903 disassembler and the debugger disassemble command. ACPICA MZ 978.
4905 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
4906 Newer versions of Bison emit this prototype, so moved the prototype out
4908 the iASL header to where it is actually used in order to avoid a
4912 iASL/Tools: Standardized use of the stream I/O functions:
4913 1) Ensure check for I/O error after every fopen/fread/fwrite
4914 2) Ensure proper order of size/count arguments for fread/fwrite
4915 3) Use test of (Actual != Requested) after all fwrite, and most fread
4916 4) Standardize I/O error messages
4917 Improves reliability and maintainability of the code. Bob Moore, Lv
4921 Disassembler: Prevent duplicate External() statements. During generation
4922 of external statements, detect similar pathnames that are actually
4923 duplicates such as these:
4926 Remove all leading '\' characters from pathnames during the external
4927 statement generation so that duplicates will be detected and tossed.
4930 Tools: Replace low-level I/O with stream I/O functions. Replace
4931 open/read/write/close with the stream I/O equivalents
4932 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
4935 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
4936 name header so that AcpiXtract recognizes the output file/table.
4938 iASL: Remove obsolete -2 option flag. Originally intended to force the
4939 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
4940 and the entire concept is now obsolete.
4942 ----------------------------------------
4943 18 October 2012. Summary of changes for version 20121018:
4946 1) ACPICA Kernel-resident Subsystem:
4948 Updated support for the ACPI 5.0 MPST table. Fixes some problems
4949 introduced by late changes to the table as it was added to the ACPI 5.0
4950 specification. Includes header, disassembler, and data table compiler
4951 support as well as a new version of the MPST template.
4953 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
4954 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
4955 methods: _HID, _CID, and _UID.
4957 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
4958 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
4959 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
4960 names for their various drivers. Affects the AcpiGetObjectInfo external
4961 interface, and other internal interfaces as well.
4963 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
4964 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
4965 on machines that support non-aligned transfers. Optimizes for this case
4966 rather than using a strncpy. With assistance from Zheng Lv.
4968 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
4969 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
4971 Added a new debug print message for AML mutex objects that are force-
4972 released. At control method termination, any currently acquired mutex
4973 objects are force-released. Adds a new debug-only message for each one
4976 Audited/updated all ACPICA return macros and the function debug depth
4977 counter: 1) Ensure that all functions that use the various TRACE macros
4978 also use the appropriate ACPICA return macros. 2) Ensure that all normal
4979 return statements surround the return expression (value) with parens to
4980 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
4981 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
4983 Global source code changes/maintenance: All extra lines at the start and
4984 end of each source file have been removed for consistency. Also, within
4985 comments, all new sentences start with a single space instead of a double
4986 space, again for consistency across the code base.
4988 Example Code and Data Size: These are the sizes for the OS-independent
4989 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4990 debug version of the code includes the debug output trace mechanism and
4991 has a much larger code and data size.
4994 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4995 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4997 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4998 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5001 2) iASL Compiler/Disassembler and Tools:
5003 AcpiExec: Improved the algorithm used for memory leak/corruption
5004 detection. Added some intelligence to the code that maintains the global
5005 list of allocated memory. The list is now ordered by allocated memory
5006 address, significantly improving performance. When running AcpiExec on
5007 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
5008 on the platform and/or the environment. Note, this performance
5009 enhancement affects the AcpiExec utility only, not the kernel-resident
5012 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
5013 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
5014 incorrect table offset reported for invalid opcodes. Report the original
5015 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
5017 Disassembler: Enhanced the -vt option to emit the binary table data in
5018 hex format to assist with debugging.
5020 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
5021 size of file structure. Colin Ian King.
5023 ----------------------------------------
5024 13 September 2012. Summary of changes for version 20120913:
5027 1) ACPICA Kernel-resident Subsystem:
5029 ACPI 5.0: Added two new notify types for the Hardware Error Notification
5030 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
5034 Table Manager: Merged/removed duplicate code in the root table resize
5035 functions. One function is external, the other is internal. Lv Zheng,
5039 Makefiles: Completely removed the obsolete "Linux" makefiles under
5040 acpica/generate/linux. These makefiles are obsolete and have been
5043 the generic unix makefiles under acpica/generate/unix.
5045 Makefiles: Ensure that binary files always copied properly. Minor rule
5047 to ensure that the final binary output files are always copied up to the
5048 appropriate binary directory (bin32 or bin64.)
5050 Example Code and Data Size: These are the sizes for the OS-independent
5051 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5053 version of the code includes the debug output trace mechanism and has a
5055 larger code and data size.
5058 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5059 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5061 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5062 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5065 2) iASL Compiler/Disassembler and Tools:
5067 Disassembler: Fixed a possible fault during the disassembly of resource
5068 descriptors when a second parse is required because of the invocation of
5069 external control methods within the table. With assistance from
5070 adq@lidskialf.net. ACPICA BZ 976.
5072 iASL: Fixed a namepath optimization problem. An error can occur if the
5074 node that contains the namepath to be optimized does not have a parent
5076 that is a named object. This change fixes the problem.
5078 iASL: Fixed a regression where the AML file is not deleted on errors. The
5080 output file should be deleted if there are any errors during the
5083 only exception is if the -f (force output) option is used. ACPICA BZ 974.
5085 iASL: Added a feature to automatically increase internal line buffer
5087 Via realloc(), automatically increase the internal line buffer sizes as
5088 necessary to support very long source code lines. The current version of
5090 preprocessor requires a buffer long enough to contain full source code
5092 This change increases the line buffer(s) if the input lines go beyond the
5093 current buffer size. This eliminates errors that occurred when a source
5095 line was longer than the buffer.
5097 iASL: Fixed a problem with constant folding in method declarations. The
5098 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
5100 Type3 opcode was used.
5102 Debugger: Improved command help support. For incorrect argument count,
5104 full help for the command. For help command itself, allow an argument to
5107 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
5108 errors during execution of the suite. Guan Chao.
5110 ----------------------------------------
5111 16 August 2012. Summary of changes for version 20120816:
5114 1) ACPICA Kernel-resident Subsystem:
5116 Removed all use of the deprecated _GTS and _BFS predefined methods. The
5118 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
5119 deprecated and will probably be removed from the ACPI specification.
5121 does not invoke them, and reportedly never will. The final nail in the
5123 is that the ACPI specification states that these methods must be run with
5124 interrupts off, which is not going to happen in a kernel interpreter.
5126 Linux has removed all use of the methods also. It was discovered that
5127 invoking these functions caused failures on some machines, probably
5129 they were never tested since Windows does not call them. Affects two
5131 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
5134 Implemented support for complex bit-packed buffers returned from the _PLD
5135 (Physical Location of Device) predefined method. Adds a new external
5136 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
5138 structure. Note: C Bitfields cannot be used for this type of predefined
5139 structure since the memory layout of individual bitfields is not defined
5141 the C language. In addition, there are endian concerns where a compiler
5143 change the bitfield ordering based on the machine type. The new ACPICA
5144 interface eliminates these issues, and should be called after _PLD is
5145 executed. ACPICA BZ 954.
5147 Implemented a change to allow a scope change to root (via "Scope (\)")
5149 execution of module-level ASL code (code that is executed at table load
5152 Added the Windows8/Server2012 string for the _OSI method. This change
5155 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
5158 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
5160 and CSRT (Core System Resource Table).
5162 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
5163 names. This simplifies access to the buffers returned by these predefined
5164 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
5166 GPE support: Removed an extraneous parameter from the various low-level
5167 internal GPE functions. Tang Feng.
5169 Removed the linux makefiles from the unix packages. The generate/linux
5170 makefiles are obsolete and have been removed from the unix tarball
5172 packages. The replacement makefiles are under generate/unix, and there is
5174 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
5176 Updates for Unix makefiles:
5177 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
5178 2) Update linker flags (move to end of command line) for AcpiExec
5182 Split ACPICA initialization functions to new file, utxfinit.c. Split from
5183 utxface.c to improve modularity and reduce file size.
5185 Example Code and Data Size: These are the sizes for the OS-independent
5186 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5187 debug version of the code includes the debug output trace mechanism and
5189 much larger code and data size.
5192 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5193 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5195 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5196 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5199 2) iASL Compiler/Disassembler and Tools:
5201 iASL: Fixed a problem with constant folding for fixed-length constant
5202 expressions. The constant-folding code was not being invoked for constant
5203 expressions that allow the use of type 3/4/5 opcodes to generate
5205 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
5207 in the generation of invalid AML bytecode. ACPICA BZ 970.
5209 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
5210 apparently automatically emit some of the necessary externals. This
5212 handles these versions in order to eliminate generation warnings.
5214 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
5216 Disassembler: Add support to decode _PLD buffers. The decoded buffer
5218 within comments in the output file.
5220 Debugger: Fixed a regression with the "Threads" command where
5221 AE_BAD_PARAMETER was always returned.
5223 ----------------------------------------
5224 11 July 2012. Summary of changes for version 20120711:
5226 1) ACPICA Kernel-resident Subsystem:
5228 Fixed a possible fault in the return package object repair code. Fixes a
5229 problem that can occur when a lone package object is wrapped with an
5231 package object in order to force conformance to the ACPI specification.
5233 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
5237 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
5238 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
5239 ARB_DIS bit must be implemented in the host-dependent C3 processor power
5241 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
5243 Intel and other vendors. (for Intel: ICH4-M and earlier)
5245 This change removes the code to disable/enable bus master arbitration
5247 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
5249 resume problems on some machines. The change has been in use for over
5253 Implemented two new external interfaces to support host-directed dynamic
5255 table load and unload. They are intended to simplify the host
5257 of hot-plug support:
5258 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
5259 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
5261 See the ACPICA reference for additional details. Adds one new file,
5262 components/tables/tbxfload.c
5264 Implemented and deployed two new interfaces for errors and warnings that
5266 known to be caused by BIOS/firmware issues:
5267 AcpiBiosError: Prints "ACPI Firmware Error" message.
5268 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
5269 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
5271 and FADT errors. Additional deployment to be completed as appropriate in
5273 future. The associated conditional macros are ACPI_BIOS_ERROR and
5274 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
5279 Implicit notify support: ensure that no memory allocation occurs within a
5280 critical region. This fix moves a memory allocation outside of the time
5282 spinlock is held. Fixes issues on systems that do not allow this
5286 Split exception code utilities and tables into a new file,
5289 Example Code and Data Size: These are the sizes for the OS-independent
5290 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5292 version of the code includes the debug output trace mechanism and has a
5294 larger code and data size.
5297 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5298 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5300 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5301 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5304 2) iASL Compiler/Disassembler and Tools:
5306 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
5310 Debugger: Enhanced the "tables" command to emit additional information
5312 the current set of ACPI tables, including the owner ID and flags decode.
5314 Debugger: Reimplemented the "unload" command to use the new
5315 AcpiUnloadParentTable external interface. This command was disable
5317 due to need for an unload interface.
5319 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
5321 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
5323 ----------------------------------------
5324 20 June 2012. Summary of changes for version 20120620:
5327 1) ACPICA Kernel-resident Subsystem:
5329 Implemented support to expand the "implicit notify" feature to allow
5331 devices to be notified by a single GPE. This feature automatically
5333 runtime device notification in the absence of a BIOS-provided GPE control
5334 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
5336 provided by ACPICA for Windows compatibility, and is a workaround for
5339 code errors. See the description of the AcpiSetupGpeForWake interface in
5341 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
5343 Changed some comments and internal function names to simplify and ensure
5344 correctness of the Linux code translation. No functional changes.
5346 Example Code and Data Size: These are the sizes for the OS-independent
5347 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5349 version of the code includes the debug output trace mechanism and has a
5351 larger code and data size.
5354 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5355 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5357 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5358 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5361 2) iASL Compiler/Disassembler and Tools:
5363 Disassembler: Added support to emit short, commented descriptions for the
5365 predefined names in order to improve the readability of the disassembled
5366 output. ACPICA BZ 959. Changes include:
5367 1) Emit descriptions for all standard predefined names (_INI, _STA,
5370 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
5371 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
5374 AcpiSrc: Fixed several long-standing Linux code translation issues.
5376 descriptions in function headers are now translated properly to lower
5379 underscores. ACPICA BZ 961. Also fixes translation problems such as
5385 local_fADT -> local_FADT
5386 execute_oSI -> execute_OSI
5388 iASL: Fixed a problem where null bytes were inadvertently emitted into
5392 iASL: Added the existing debug options to the standard help screen. There
5394 no longer two different help screens. ACPICA BZ 957.
5396 AcpiHelp: Fixed some typos in the various predefined name descriptions.
5398 expand some of the descriptions where appropriate.
5400 iASL: Fixed the -ot option (display compile times/statistics). Was not
5402 properly for standard output; only worked for the debug file case.
5404 ----------------------------------------
5405 18 May 2012. Summary of changes for version 20120518:
5408 1) ACPICA Core Subsystem:
5410 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
5412 to block until asynchronous events such as notifies and GPEs have
5414 Within ACPICA, it is only called before a notify or GPE handler is
5415 removed/uninstalled. It also may be useful for the host OS within related
5416 drivers such as the Embedded Controller driver. See the ACPICA reference
5418 additional information. ACPICA BZ 868.
5420 ACPI Tables: Added a new error message for a possible overflow failure
5422 the conversion of FADT 32-bit legacy register addresses to internal
5425 bit GAS structure representation. The GAS has a one-byte "bit length"
5427 thus limiting the register length to 255 bits. ACPICA BZ 953.
5429 Example Code and Data Size: These are the sizes for the OS-independent
5430 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5432 version of the code includes the debug output trace mechanism and has a
5434 larger code and data size.
5437 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5438 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5440 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5441 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5444 2) iASL Compiler/Disassembler and Tools:
5446 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
5448 This keyword was added late in the ACPI 5.0 release cycle and was not
5449 implemented until now.
5451 Disassembler: Added support for Operation Region externals. Adds missing
5452 support for operation regions that are defined in another table, and
5453 referenced locally via a Field or BankField ASL operator. Now generates
5455 correct External statement.
5457 Disassembler: Several additional fixes for the External() statement
5459 related to some ASL operators. Also, order the External() statements
5460 alphabetically in the disassembler output. Fixes the External()
5463 the Create* field, Alias, and Scope operators:
5464 1) Create* buffer field operators - fix type mismatch warning on
5466 2) Alias - implement missing External support
5467 3) Scope - fix to make sure all necessary externals are emitted.
5469 iASL: Improved pathname support. For include files, merge the prefix
5471 with the file pathname and eliminate unnecessary components. Convert
5472 backslashes in all pathnames to forward slashes, for readability. Include
5474 pathname changes affect both #include and Include() type operators.
5476 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
5478 of a valid line by inserting a newline and then returning the EOF during
5480 next call to GetNextLine. Prevents the line from being ignored due to EOF
5483 iASL: Implemented some changes to enhance the IDE support (-vi option.)
5485 and Warning messages are now correctly recognized for both the source
5487 browser and the global error and warning counts.
5489 ----------------------------------------
5490 20 April 2012. Summary of changes for version 20120420:
5493 1) ACPICA Core Subsystem:
5495 Implemented support for multiple notify handlers. This change adds
5498 allow multiple system and device notify handlers on Device, Thermal Zone,
5500 Processor objects. This can simplify the host OS notification
5502 Also re-worked and restructured the entire notify support code to
5504 handler installation, handler removal, notify event queuing, and notify
5505 dispatch to handler(s). Note: there can still only be two global notify
5506 handlers - one for system notifies and one for device notifies. There are
5508 changes to the existing handler install/remove interfaces. Lin Ming, Bob
5509 Moore, Rafael Wysocki.
5511 Fixed a regression in the package repair code where the object reference
5512 count was calculated incorrectly. Regression was introduced in the commit
5513 "Support to add Package wrappers".
5515 Fixed a couple possible memory leaks in the AML parser, in the error
5517 path. Jesper Juhl, Lin Ming.
5519 Example Code and Data Size: These are the sizes for the OS-independent
5520 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5521 debug version of the code includes the debug output trace mechanism and
5523 much larger code and data size.
5526 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5527 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5529 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5530 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5533 2) iASL Compiler/Disassembler and Tools:
5535 iASL: Fixed a problem with the resource descriptor support where the
5537 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
5538 included in cumulative descriptor offset, resulting in incorrect values
5540 resource tags within resource descriptors appearing after a
5542 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
5544 iASL and Preprocessor: Implemented full support for the #line directive
5546 correctly track original source file line numbers through the .i
5548 output file - for error and warning messages.
5550 iASL: Expand the allowable byte constants for address space IDs.
5552 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
5553 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
5555 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
5557 iASL: Add option to completely disable the preprocessor (-Pn).
5559 iASL: Now emit all error/warning messages to standard error (stderr) by
5560 default (instead of the previous stdout).
5562 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
5564 for resource descriptor offset fix above. Update/cleanup error output
5565 routines. Enable and send iASL errors/warnings to an error logfile
5566 (error.txt). Send all other iASL output to a logfile (compiler.txt).
5568 several extraneous "unrecognized operator" messages.
5570 ----------------------------------------
5571 20 March 2012. Summary of changes for version 20120320:
5574 1) ACPICA Core Subsystem:
5576 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
5577 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
5579 does not execute these methods, and therefore these methods are often
5580 untested. It has been seen on some systems where the execution of these
5581 methods causes errors and also prevents the machine from entering S5. It
5583 therefore suggested that host operating systems do not execute these
5585 by default. In the future, perhaps these methods can be optionally
5587 based on the age of the system and/or what is the newest version of
5589 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
5591 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
5594 Fixed a problem where the length of the local/common FADT was set too
5596 The local FADT table length cannot be set to the common length until the
5597 original length has been examined. There is code that checks the table
5599 and sets various fields appropriately. This can affect older machines
5601 early FADT versions. For example, this can cause inadvertent writes to
5603 CST_CNT register. Julian Anastasov.
5605 Fixed a mapping issue related to a physical table override. Use the
5607 mapping mechanism for tables loaded via the physical override OSL
5609 This allows for early mapping before the virtual memory manager is
5611 Thomas Renninger, Bob Moore.
5613 Enhanced the automatic return-object repair code: Repair a common problem
5615 predefined methods that are defined to return a variable-length Package
5617 sub-objects. If there is only one sub-object, some BIOS ASL code
5619 simply returns the single object instead of a Package with one sub-
5621 This new support will repair this error by wrapping a Package object
5623 the original object, creating the correct and expected Package with one
5625 object. Names that can be repaired in this manner include: _ALR, _CSD,
5627 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
5630 Changed the exception code returned for invalid ACPI paths passed as
5631 parameters to external interfaces such as AcpiEvaluateObject. Was
5632 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
5634 Example Code and Data Size: These are the sizes for the OS-independent
5635 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5637 version of the code includes the debug output trace mechanism and has a
5639 larger code and data size.
5642 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5643 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5645 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5646 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5649 2) iASL Compiler/Disassembler and Tools:
5651 iASL: Added the infrastructure and initial implementation of a integrated
5653 like preprocessor. This will simplify BIOS development process by
5655 the need for a separate preprocessing step during builds. On Windows, it
5657 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
5658 features including full #define() macro support are still under
5660 These preprocessor directives are supported:
5673 In addition, these new command line options are supported:
5674 -D <symbol> Define symbol for preprocessor use
5675 -li Create preprocessed output file (*.i)
5676 -P Preprocess only and create preprocessor output file (*.i)
5678 Table Compiler: Fixed a problem where the equals operator within an
5680 did not work properly.
5682 Updated iASL to use the current versions of Bison/Flex. Updated the
5684 project file to invoke these tools from the standard location. ACPICA BZ
5687 Flex for Windows: V2.5.4
5688 Bison for Windows: V2.4.1
5690 ----------------------------------------
5691 15 February 2012. Summary of changes for version 20120215:
5694 1) ACPICA Core Subsystem:
5696 There have been some major changes to the sleep/wake support code, as
5697 described below (a - e).
5699 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
5700 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
5701 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
5703 time the _BFS method is called and the _WAK method is called. NOTE: all
5705 must update their wake/resume code or else sleep/wake will not work
5709 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
5711 method. Some machines require that the GPEs are enabled before the _WAK
5713 is executed. Thomas Renninger.
5715 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
5717 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
5719 determine whether the system is rebooting or resuming. Matthew Garrett.
5721 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
5723 match the ACPI specification requirement. Rafael Wysocki.
5725 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
5726 registers within the V5 FADT. This support adds two new files:
5727 hardware/hwesleep.c implements the support for the new registers. Moved
5729 sleep/wake external interfaces to hardware/hwxfsleep.c.
5732 Added a new OSL interface for ACPI table overrides,
5733 AcpiOsPhysicalTableOverride. This interface allows the host to override a
5734 table via a physical address, instead of the logical address required by
5735 AcpiOsTableOverride. This simplifies the host implementation. Initial
5736 implementation by Thomas Renninger. The ACPICA implementation creates a
5738 shared function for table overrides that attempts both a logical and a
5741 Expanded the OSL memory read/write interfaces to 64-bit data
5742 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
5743 transfer support for GAS register structures passed to AcpiRead and
5746 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
5748 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
5750 See the ACPICA reference for details. ACPICA BZ 942. This option removes
5752 10% of the code and 5% of the static data, and the following hardware
5754 features become unavailable:
5755 PM Event and Control registers
5756 SCI interrupt (and handler)
5758 General Purpose Events (GPEs)
5761 FACS table (Waking vectors and Global Lock)
5763 Updated the unix tarball directory structure to match the ACPICA git
5765 tree. This ensures that the generic unix makefiles work properly (in
5766 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
5769 Updated the return value of the _REV predefined method to integer value 5
5771 reflect ACPI 5.0 support.
5773 Moved the external ACPI PM timer interface prototypes to the public
5775 file where they belong.
5777 Example Code and Data Size: These are the sizes for the OS-independent
5778 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5780 version of the code includes the debug output trace mechanism and has a
5782 larger code and data size.
5785 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5786 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5788 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5789 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5792 2) iASL Compiler/Disassembler and Tools:
5794 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
5795 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
5796 incorrectly displayed.
5798 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
5801 ----------------------------------------
5802 11 January 2012. Summary of changes for version 20120111:
5805 1) ACPICA Core Subsystem:
5807 Implemented a new mechanism to allow host device drivers to check for
5809 range conflicts with ACPI Operation Regions. Both SystemMemory and
5811 address spaces are supported. A new external interface,
5812 AcpiCheckAddressRange,
5813 allows drivers to check an address range against the ACPI namespace. See
5815 ACPICA reference for additional details. Adds one new file,
5816 utilities/utaddress.c. Lin Ming, Bob Moore.
5818 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
5821 Status registers, update the ACPI 5.0 flags, and update internal data
5822 structures to handle an FADT larger than 256 bytes. The size of the ACPI
5826 Updated all ACPICA copyrights and signons to 2012. Added the 2012
5828 all module headers and signons, including the standard Linux header. This
5829 affects virtually every file in the ACPICA core subsystem, iASL compiler,
5831 all ACPICA utilities.
5833 Example Code and Data Size: These are the sizes for the OS-independent
5834 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5836 version of the code includes the debug output trace mechanism and has a
5838 larger code and data size.
5841 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5842 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5844 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5845 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5848 2) iASL Compiler/Disassembler and Tools:
5850 Disassembler: fixed a problem with the automatic resource tag generation
5851 support. Fixes a problem where the resource tags are inadvertently not
5852 constructed if the table being disassembled contains external references
5854 control methods. Moved the actual construction of the tags to after the
5856 namespace is constructed (after 2nd parse is invoked due to external
5858 method references.) ACPICA BZ 941.
5860 Table Compiler: Make all "generic" operators caseless. These are the
5862 like UINT8, String, etc. Making these caseless improves ease-of-use.
5866 ----------------------------------------
5867 23 November 2011. Summary of changes for version 20111123:
5869 0) ACPI 5.0 Support:
5871 This release contains full support for the ACPI 5.0 specification, as
5874 Reduced Hardware Support:
5875 -------------------------
5877 This support allows for ACPI systems without the usual ACPI hardware.
5879 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
5881 not attempt to initialize or use any of the usual ACPI hardware. Note,
5883 this flag is set, all of the following ACPI hardware is assumed to be not
5884 present and is not initialized or accessed:
5886 General Purpose Events (GPEs)
5887 Fixed Events (PM1a/PM1b and PM Control)
5888 Power Management Timer and Console Buttons (power/sleep)
5889 Real-time Clock Alarm
5891 System Control Interrupt (SCI)
5892 The FACS is assumed to be non-existent
5897 All new tables and updates to existing tables are fully supported in the
5898 ACPICA headers (for use by device drivers), the disassembler, and the
5900 Data Table Compiler. ACPI 5.0 defines these new tables:
5902 BGRT /* Boot Graphics Resource Table */
5903 DRTM /* Dynamic Root of Trust for Measurement table */
5904 FPDT /* Firmware Performance Data Table */
5905 GTDT /* Generic Timer Description Table */
5906 MPST /* Memory Power State Table */
5907 PCCT /* Platform Communications Channel Table */
5908 PMTT /* Platform Memory Topology Table */
5909 RASF /* RAS Feature table */
5911 Operation Regions/SpaceIDs:
5912 ---------------------------
5914 All new operation regions are fully supported by the iASL compiler, the
5915 disassembler, and the ACPICA runtime code (for dispatch to region
5917 The new operation region Space IDs are:
5922 Resource Descriptors:
5923 ---------------------
5925 All new ASL resource descriptors are fully supported by the iASL
5928 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
5930 all new predefined resource tags). New descriptors are:
5939 ASL/AML Operators, New and Modified:
5940 ------------------------------------
5942 One new operator is added, the Connection operator, which is used to
5944 a GeneralPurposeIo or GenericSerialBus resource descriptor with
5946 field objects within an operation region. Several new protocols are
5948 with the AccessAs operator. All are fully supported by the iASL compiler,
5949 disassembler, and runtime ACPICA AML interpreter:
5951 Connection // Declare Field Connection
5953 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
5954 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
5956 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
5957 RawDataBuffer // Data type for Vendor Data
5960 Predefined ASL/AML Objects:
5961 ---------------------------
5963 All new predefined objects/control-methods are supported by the iASL
5965 and the ACPICA runtime validation/repair (arguments and return values.)
5967 predefined names include the following:
5969 Standard Predefined Names (Objects or Control Methods):
5970 _AEI, _CLS, _CPC, _CWS, _DEP,
5971 _DLM, _EVT, _GCP, _CRT, _GWS,
5972 _HRV, _PRE, _PSE, _SRT, _SUB.
5974 Resource Tags (Names used to access individual fields within resource
5976 _DBT, _DPL, _DRS, _END, _FLC,
5977 _IOR, _LIN, _MOD, _PAR, _PHA,
5978 _PIN, _PPI, _POL, _RXL, _SLV,
5979 _SPE, _STB, _TXL, _VEN.
5981 ACPICA External Interfaces:
5982 ---------------------------
5984 Several new interfaces have been defined for use by ACPI-related device
5985 drivers and other host OS services:
5987 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
5989 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
5990 provided by the BIOS. They are intended to be used in conjunction with
5992 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
5993 mutual exclusion with the AML code/interpreter.
5995 AcpiGetEventResources: Returns the (formatted) resource descriptors as
5997 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
5999 resource descriptors associated with hardware-reduced platform events,
6001 to the AcpiGetCurrentResources interface.
6003 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
6004 operation regions, information about the Connection() object and any
6006 length information is passed to the region handler within the Context
6009 AcpiBufferToResource: This interface converts a raw AML buffer containing
6011 resource template or resource descriptor to the ACPI_RESOURCE internal
6013 suitable for use by device drivers. Can be used by an operation region
6015 to convert the Connection() buffer object into a ACPI_RESOURCE.
6017 Miscellaneous/Tools/TestSuites:
6018 -------------------------------
6020 Support for extended _HID names (Four alpha characters instead of three).
6021 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
6022 Support for ACPI 5.0 features in the ASLTS test suite.
6023 Fully updated documentation (ACPICA and iASL reference documents.)
6025 ACPI Table Definition Language:
6026 -------------------------------
6028 Support for this language was implemented and released as a subsystem of
6030 iASL compiler in 2010. (See the iASL compiler User Guide.)
6033 Non-ACPI 5.0 changes for this release:
6034 --------------------------------------
6036 1) ACPICA Core Subsystem:
6038 Fix a problem with operation region declarations where a failure can
6041 the region name and an argument that evaluates to an object (such as the
6042 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
6045 Do not abort an ACPI table load if an invalid space ID is found within.
6047 will be caught later if the offending method is executed. ACPICA BZ 925.
6049 Fixed an issue with the FFixedHW space ID where the ID was not always
6050 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
6052 Fixed a problem with the 32-bit generation of the unix-specific OSL
6053 (osunixxf.c). Lin Ming, ACPICA BZ 936.
6055 Several changes made to enable generation with the GCC 4.6 compiler.
6059 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
6061 field registers out-of-range.
6063 2) iASL Compiler/Disassembler and Tools:
6065 iASL: Implemented the __PATH__ operator, which returns the full pathname
6067 the current source file.
6069 AcpiHelp: Automatically display expanded keyword information for all ASL
6072 Debugger: Add "Template" command to disassemble/dump resource template
6075 Added a new master script to generate and execute the ASLTS test suite.
6076 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
6078 iASL: Fix problem with listing generation during processing of the
6080 operator where AML listing was disabled until the entire Switch block was
6083 iASL: Improve support for semicolon statement terminators. Fix "invalid
6084 character" message for some cases when the semicolon is used. Semicolons
6086 now allowed after every <Term> grammar element. ACPICA BZ 927.
6088 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
6091 Disassembler: Fix problem with disassembly of the DataTableRegion
6093 where an inadvertent "Unhandled deferred opcode" message could be
6096 3) Example Code and Data Size
6098 These are the sizes for the OS-independent acpica.lib produced by the
6099 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6100 includes the debug output trace mechanism and has a much larger code and
6105 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6106 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6108 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
6109 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
6111 ----------------------------------------
6112 22 September 2011. Summary of changes for version 20110922:
6116 Support for ACPI 5.0 in ACPICA has been underway for several months and
6118 be released at the same time that ACPI 5.0 is officially released.
6120 The ACPI 5.0 specification is on track for release in the next few
6123 1) ACPICA Core Subsystem:
6125 Fixed a problem where the maximum sleep time for the Sleep() operator was
6126 intended to be limited to two seconds, but was inadvertently limited to
6130 Linux and Unix makefiles: Added header file dependencies to ensure
6132 generation of ACPICA core code and utilities. Also simplified the
6134 considerably through the use of the vpath variable to specify search
6138 2) iASL Compiler/Disassembler and Tools:
6140 iASL: Implemented support to check the access length for all fields
6142 access named Resource Descriptor fields. For example, if a resource field
6144 defined to be two bits, a warning is issued if a CreateXxxxField() is
6146 with an incorrect bit length. This is implemented for all current
6148 descriptor names. ACPICA BZ 930.
6150 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
6154 iASL: Fixed a couple of issues associated with variable-length package
6155 objects. 1) properly handle constants like One, Ones, Zero -- do not make
6157 VAR_PACKAGE when these are used as a package length. 2) Allow the
6159 opcode (in addition to PACKAGE) when validating object types for
6163 iASL: Emit statistics for all output files (instead of just the ASL input
6165 AML output). Includes listings, hex files, etc.
6167 iASL: Added -G option to the table compiler to allow the compilation of
6169 ACPI tables. The only part of a table that is required is the standard
6174 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
6176 which also adds correct 64-bit support. Also, now all output filenames
6178 completely lower case.
6180 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
6181 loading table files. A warning is issued for any such tables. The only
6182 exception is an FADT. This also fixes a possible fault when attempting to
6184 non-AML tables. ACPICA BZ 932.
6186 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
6188 missing table terminator could cause a fault when using the -p option.
6190 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
6193 3) Example Code and Data Size
6195 These are the sizes for the OS-independent acpica.lib produced by the
6196 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6197 includes the debug output trace mechanism and has a much larger code and
6201 Previous Release (VC 9.0):
6202 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6203 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6204 Current Release (VC 9.0):
6205 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6206 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6209 ----------------------------------------
6210 23 June 2011. Summary of changes for version 20110623:
6212 1) ACPI CA Core Subsystem:
6214 Updated the predefined name repair mechanism to not attempt repair of a
6216 return object if a _PSS object is present. We can only sort the _TSS
6218 package if there is no _PSS within the same scope. This is because if
6221 present, the ACPI specification dictates that the _TSS Power Dissipation
6223 is to be ignored, and therefore some BIOSs leave garbage values in the
6225 Power field(s). In this case, it is best to just return the _TSS package
6227 is. Reported by, and fixed with assistance from Fenghua Yu.
6229 Added an option to globally disable the control method return value
6231 and repair. This runtime option can be used to disable return value
6234 this is causing a problem on a particular machine. Also added an option
6236 AcpiExec (-dr) to set this disable flag.
6238 All makefiles and project files: Major changes to improve generation of
6240 tools. ACPICA BZ 912:
6241 Reduce default optimization levels to improve compatibility
6242 For Linux, add strict-aliasing=0 for gcc 4
6243 Cleanup and simplify use of command line defines
6244 Cleanup multithread library support
6245 Improve usage messages
6247 Linux-specific header: update handling of THREAD_ID and pthread. For the
6249 bit case, improve casting to eliminate possible warnings, especially with
6253 Example Code and Data Size: These are the sizes for the OS-independent
6254 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6256 version of the code includes the debug output trace mechanism and has a
6258 larger code and data size.
6260 Previous Release (VC 9.0):
6261 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6262 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6263 Current Release (VC 9.0):
6264 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6265 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6267 2) iASL Compiler/Disassembler and Tools:
6269 With this release, a new utility named "acpihelp" has been added to the
6271 package. This utility summarizes the ACPI specification chapters for the
6273 and AML languages. It generates under Linux/Unix as well as Windows, and
6274 provides the following functionality:
6275 Find/display ASL operator(s) -- with description and syntax.
6276 Find/display ASL keyword(s) -- with exact spelling and descriptions.
6277 Find/display ACPI predefined name(s) -- with description, number
6278 of arguments, and the return value data type.
6279 Find/display AML opcode name(s) -- with opcode, arguments, and
6281 Decode/display AML opcode -- with opcode name, arguments, and
6284 Service Layers: Make multi-thread support configurable. Conditionally
6286 the multi-thread support so that threading libraries will not be linked
6289 necessary. The only tool that requires multi-thread support is AcpiExec.
6291 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
6293 Bison appear to want the interface to yyerror to be a const char * (or at
6294 least this is a problem when generating iASL on some systems.) ACPICA BZ
6298 Tools: Fix for systems where O_BINARY is not defined. Only used for
6300 versions of the tools.
6302 ----------------------------------------
6303 27 May 2011. Summary of changes for version 20110527:
6305 1) ACPI CA Core Subsystem:
6307 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
6309 signature. Now, only allow SSDT, OEMx, and a null signature. History:
6310 1) Originally, we checked the table signature for "SSDT" or "PSDT".
6311 (PSDT is now obsolete.)
6312 2) We added support for OEMx tables, signature "OEM" plus a fourth
6313 "don't care" character.
6314 3) Valid tables were encountered with a null signature, so we just
6315 gave up on validating the signature, (05/2008).
6316 4) We encountered non-AML tables such as the MADT, which caused
6317 interpreter errors and kernel faults. So now, we once again allow
6318 only SSDT, OEMx, and now, also a null signature. (05/2011).
6320 Added the missing _TDL predefined name to the global name list in order
6322 enable validation. Affects both the core ACPICA code and the iASL
6325 Example Code and Data Size: These are the sizes for the OS-independent
6326 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6328 version of the code includes the debug output trace mechanism and has a
6330 larger code and data size.
6332 Previous Release (VC 9.0):
6333 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6334 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6335 Current Release (VC 9.0):
6336 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6337 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6339 2) iASL Compiler/Disassembler and Tools:
6341 Debugger/AcpiExec: Implemented support for "complex" method arguments on
6343 debugger command line. This adds support beyond simple integers --
6345 Strings, Buffers, and Packages. Includes support for nested packages.
6346 Increased the default command line buffer size to accommodate these
6348 See the ACPICA reference for details and syntax. ACPICA BZ 917.
6350 Debugger/AcpiExec: Implemented support for "default" method arguments for
6352 Execute/Debug command. Now, the debugger will always invoke a control
6354 with the required number of arguments -- even if the command line
6356 none or insufficient arguments. It uses default integer values for any
6358 arguments. Also fixes a bug where only six method arguments maximum were
6359 supported instead of the required seven.
6361 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
6363 also return status in order to prevent buffer overruns. See the ACPICA
6364 reference for details and syntax. ACPICA BZ 921
6366 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
6367 makefiles to simplify support for the two different but similar parser
6368 generators, bison and yacc.
6370 Updated the generic unix makefile for gcc 4. The default gcc version is
6372 expected to be 4 or greater, since options specific to gcc 4 are used.
6374 ----------------------------------------
6375 13 April 2011. Summary of changes for version 20110413:
6377 1) ACPI CA Core Subsystem:
6379 Implemented support to execute a so-called "orphan" _REG method under the
6381 device. This change will force the execution of a _REG method underneath
6384 device even if there is no corresponding operation region of type
6385 EmbeddedControl. Fixes a problem seen on some machines and apparently is
6386 compatible with Windows behavior. ACPICA BZ 875.
6388 Added more predefined methods that are eligible for automatic NULL
6390 element removal. This change adds another group of predefined names to
6393 of names that can be repaired by having NULL package elements dynamically
6394 removed. This group are those methods that return a single variable-
6396 package containing simple data types such as integers, buffers, strings.
6398 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
6401 and _TZD. ACPICA BZ 914.
6403 Split and segregated all internal global lock functions to a new file,
6406 Updated internal address SpaceID for DataTable regions. Moved this
6409 id in preparation for ACPI 5.0 changes that will include some new space
6412 change should not affect user/host code.
6414 Example Code and Data Size: These are the sizes for the OS-independent
6416 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6418 the code includes the debug output trace mechanism and has a much larger
6423 Previous Release (VC 9.0):
6424 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6425 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6426 Current Release (VC 9.0):
6427 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6428 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6430 2) iASL Compiler/Disassembler and Tools:
6432 iASL/DTC: Major update for new grammar features. Allow generic data types
6434 custom ACPI tables. Field names are now optional. Any line can be split
6436 multiple lines using the continuation char (\). Large buffers now use
6438 continuation character(s) and no colon on the continuation lines. See the
6440 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
6443 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
6445 Since the parser stuffs a "zero" as the return value for these statements
6448 the underlying AML grammar), they were seen as "return with value" by the
6450 semantic checking. They are now seen correctly as "null" return
6453 iASL: Check if a_REG declaration has a corresponding Operation Region.
6455 check for each _REG to ensure that there is in fact a corresponding
6457 region declaration in the same scope. If not, the _REG method is not very
6459 since it probably won't be executed. ACPICA BZ 915.
6461 iASL/DTC: Finish support for expression evaluation. Added a new
6464 that implements c-style operator precedence and parenthesization. ACPICA
6468 Disassembler/DTC: Remove support for () and <> style comments in data
6471 that DTC has full expression support, we don't want to have comment
6474 start with a parentheses or a less-than symbol. Now, only the standard /*
6477 comments are supported, as well as the bracket [] comments.
6479 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
6481 headers in the acpidump file. Update the header validation to support
6483 tables. Problem introduced in previous AcpiXtract version in the change
6485 support "wrong checksum" error messages emitted by acpidump utility.
6487 iASL: Add a * option to generate all template files (as a synonym for
6491 "iasl -T *" or "iasl -T ALL".
6493 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
6495 abort the compiler on "fatal" errors, simply should abort the current
6497 This allows multiple compiles with a single (possibly wildcard) compiler
6500 ----------------------------------------
6501 16 March 2011. Summary of changes for version 20110316:
6503 1) ACPI CA Core Subsystem:
6505 Fixed a problem caused by a _PRW method appearing at the namespace root
6507 during the setup of wake GPEs. A fault could occur if a _PRW directly
6510 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
6512 Implemented support for "spurious" Global Lock interrupts. On some
6514 global lock interrupt can occur without the pending flag being set. Upon
6517 interrupt, we now ensure that a thread is actually waiting for the lock
6519 signaling GL availability. Rafael Wysocki, Bob Moore.
6521 Example Code and Data Size: These are the sizes for the OS-independent
6523 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6525 the code includes the debug output trace mechanism and has a much larger
6530 Previous Release (VC 9.0):
6531 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6532 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6533 Current Release (VC 9.0):
6534 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6535 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6537 2) iASL Compiler/Disassembler and Tools:
6539 Implemented full support for the "SLIC" ACPI table. Includes support in
6541 header files, disassembler, table compiler, and template generator. Bob
6545 AcpiXtract: Correctly handle embedded comments and messages from
6547 Apparently some or all versions of acpidump will occasionally emit a
6550 "Wrong checksum", etc., into the dump file. This was causing problems for
6551 AcpiXtract. ACPICA BZ 905.
6553 iASL: Fix the Linux makefile by removing an inadvertent double file
6557 AcpiExec: Update installation of operation region handlers. Install one
6559 for a user-defined address space. This is used by the ASL test suite
6562 ----------------------------------------
6563 11 February 2011. Summary of changes for version 20110211:
6565 1) ACPI CA Core Subsystem:
6567 Added a mechanism to defer _REG methods for some early-installed
6569 Most user handlers should be installed before call to
6570 AcpiEnableSubsystem.
6571 However, Event handlers and region handlers should be installed after
6572 AcpiInitializeObjects. Override handlers for the "default" regions should
6574 installed early, however. This change executes all _REG methods for the
6575 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
6576 chicken/egg issues between them. ACPICA BZ 848.
6578 Implemented an optimization for GPE detection. This optimization will
6580 ignore GPE registers that contain no enabled GPEs -- there is no need to
6581 read the register since this information is available internally. This
6582 becomes more important on machines with a large GPE space. ACPICA
6584 884. Lin Ming. Suggestion from Joe Liu.
6586 Removed all use of the highly unreliable FADT revision field. The
6588 number in the FADT has been found to be completely unreliable and cannot
6590 trusted. Only the actual table length can be used to infer the version.
6592 change updates the ACPICA core and the disassembler so that both no
6594 even look at the FADT version and instead depend solely upon the FADT
6597 Fix an unresolved name issue for the no-debug and no-error-message source
6598 generation cases. The _AcpiModuleName was left undefined in these cases,
6600 it is actually needed as a parameter to some interfaces. Define
6601 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
6603 Split several large files (makefiles and project files updated)
6604 utglobal.c -> utdecode.c
6605 dbcomds.c -> dbmethod.c dbnames.c
6606 dsopcode.c -> dsargs.c dscontrol.c
6607 dsload.c -> dsload2.c
6608 aslanalyze.c -> aslbtypes.c aslwalks.c
6610 Example Code and Data Size: These are the sizes for the OS-independent
6611 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6612 debug version of the code includes the debug output trace mechanism and
6614 a much larger code and data size.
6616 Previous Release (VC 9.0):
6617 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6618 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6619 Current Release (VC 9.0):
6620 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6621 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6623 2) iASL Compiler/Disassembler and Tools:
6625 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
6626 These are useful C-style macros with the standard definitions. ACPICA
6629 iASL/DTC: Added support for integer expressions and labels. Support for
6631 expressions for all integer fields in all ACPI tables. Support for labels
6633 "generic" portions of tables such as UEFI. See the iASL reference manual.
6635 Debugger: Added a command to display the status of global handlers. The
6636 "handlers" command will display op region, fixed event, and miscellaneous
6637 global handlers. installation status -- and for op regions, whether
6639 or user-installed handler will be used.
6641 iASL: Warn if reserved method incorrectly returns a value. Many
6643 names are defined such that they do not return a value. If implemented as
6645 method, issue a warning if such a name explicitly returns a value. ACPICA
6648 iASL: Added detection of GPE method name conflicts. Detects a conflict
6650 there are two GPE methods of the form _Lxy and _Exy in the same scope.
6652 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
6654 iASL/DTC: Fixed a couple input scanner issues with comments and line
6655 numbers. Comment remover could get confused and miss a comment ending.
6657 a problem with line counter maintenance.
6659 iASL/DTC: Reduced the severity of some errors from fatal to error. There
6661 no need to abort on simple errors within a field definition.
6663 Debugger: Simplified the output of the help command. All help output now
6665 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
6667 ----------------------------------------
6668 12 January 2011. Summary of changes for version 20110112:
6670 1) ACPI CA Core Subsystem:
6672 Fixed a race condition between method execution and namespace walks that
6674 possibly cause a fault. The problem was apparently introduced in version
6675 20100528 as a result of a performance optimization that reduces the
6678 namespace walks upon method exit by using the delete_namespace_subtree
6679 function instead of the delete_namespace_by_owner function used
6681 Bug is a missing namespace lock in the delete_namespace_subtree function.
6682 dana.myers@oracle.com
6684 Fixed several issues and a possible fault with the automatic "serialized"
6685 method support. History: This support changes a method to "serialized" on
6687 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
6688 possibility that it cannot handle reentrancy. This fix repairs a couple
6690 issues seen in the field, especially on machines with many cores:
6692 1) Delete method children only upon the exit of the last thread,
6693 so as to not delete objects out from under other running threads
6694 (and possibly causing a fault.)
6695 2) Set the "serialized" bit for the method only upon the exit of the
6696 Last thread, so as to not cause deadlock when running threads
6698 3) Cleanup the use of the AML "MethodFlags" and internal method flags
6699 so that there is no longer any confusion between the two.
6701 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
6703 Debugger: Now lock the namespace for duration of a namespace dump.
6705 issues if the namespace is changing dynamically underneath the debugger.
6706 Especially affects temporary namespace nodes, since the debugger displays
6709 Updated the ordering of include files. The ACPICA headers should appear
6710 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
6712 any necessary compiler-specific defines, etc. Affects the ACPI-related
6716 Updated all ACPICA copyrights and signons to 2011. Added the 2011
6718 to all module headers and signons, including the Linux header. This
6720 virtually every file in the ACPICA core subsystem, iASL compiler, and all
6723 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
6724 project files for VC++ 6.0 are now obsolete. New project files can be
6726 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
6729 Example Code and Data Size: These are the sizes for the OS-independent
6730 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6731 debug version of the code includes the debug output trace mechanism and
6733 much larger code and data size.
6735 Previous Release (VC 6.0):
6736 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6737 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6738 Current Release (VC 9.0):
6739 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6740 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6742 2) iASL Compiler/Disassembler and Tools:
6744 iASL: Added generic data types to the Data Table compiler. Add "generic"
6746 types such as UINT32, String, Unicode, etc., to simplify the generation
6748 platform-defined tables such as UEFI. Lin Ming.
6750 iASL: Added listing support for the Data Table Compiler. Adds listing
6752 (-l) to display actual binary output for each line of input code.
6754 ----------------------------------------
6755 09 December 2010. Summary of changes for version 20101209:
6757 1) ACPI CA Core Subsystem:
6759 Completed the major overhaul of the GPE support code that was begun in
6761 2010. Major features include: removal of _PRW execution in ACPICA (host
6762 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
6763 changes to existing interfaces, simplification of GPE handler operation,
6765 a handful of new interfaces:
6771 One new file, evxfgpe.c to consolidate all external GPE interfaces.
6773 See the ACPICA Programmer Reference for full details and programming
6774 information. See the new section 4.4 "General Purpose Event (GPE)
6776 for a full overview, and section 8.7 "ACPI General Purpose Event
6778 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
6780 Bob Moore, Rafael Wysocki.
6782 Implemented a new GPE feature for Windows compatibility, the "Implicit
6784 GPE Notify". This feature will automatically issue a Notify(2) on a
6786 when a Wake GPE is received if there is no corresponding GPE method or
6787 handler. ACPICA BZ 870.
6789 Fixed a problem with the Scope() operator during table parse and load
6791 During load phase (table load or method execution), the scope operator
6793 not enter the target into the namespace. Instead, it should open a new
6795 at the target location. Linux BZ 19462, ACPICA BZ 882.
6797 Example Code and Data Size: These are the sizes for the OS-independent
6798 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6799 debug version of the code includes the debug output trace mechanism and
6801 much larger code and data size.
6804 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6805 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6807 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6808 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6810 2) iASL Compiler/Disassembler and Tools:
6812 iASL: Relax the alphanumeric restriction on _CID strings. These strings
6814 "bus-specific" per the ACPI specification, and therefore any characters
6816 acceptable. The only checks that can be performed are for a null string
6818 perhaps for a leading asterisk. ACPICA BZ 886.
6820 iASL: Fixed a problem where a syntax error that caused a premature EOF
6821 condition on the source file emitted a very confusing error message. The
6822 premature EOF is now detected correctly. ACPICA BZ 891.
6824 Disassembler: Decode the AccessSize within a Generic Address Structure
6826 access, word access, etc.) Note, this field does not allow arbitrary bit
6827 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
6829 New: AcpiNames utility - Example namespace dump utility. Shows an example
6831 ACPICA configuration for a minimal namespace dump utility. Uses table and
6832 namespace managers, but no AML interpreter. Does not add any
6834 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
6835 partition and configure ACPICA. ACPICA BZ 883.
6837 AML Debugger: Increased the debugger buffer size for method return
6839 Was 4K, increased to 16K. Also enhanced error messages for debugger
6841 execution, including the buffer overflow case.
6843 ----------------------------------------
6844 13 October 2010. Summary of changes for version 20101013:
6846 1) ACPI CA Core Subsystem:
6848 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
6850 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
6851 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
6853 Changed the type of the predefined namespace object _TZ from ThermalZone
6855 Device. This was found to be confusing to the host software that
6857 the various thermal zones, since _TZ is not really a ThermalZone.
6860 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
6863 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
6864 string is "Windows 2006 SP2".
6866 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
6868 code automatically repairs _HID-related strings, this type of code is no
6869 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
6872 Example Code and Data Size: These are the sizes for the OS-independent
6873 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6874 debug version of the code includes the debug output trace mechanism and
6876 much larger code and data size.
6879 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6880 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6882 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6883 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6885 2) iASL Compiler/Disassembler and Tools:
6887 iASL: Implemented additional compile-time validation for _HID strings.
6889 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
6892 the string must be exactly seven or eight characters. For both _HID and
6894 strings, all characters must be alphanumeric. ACPICA BZ 874.
6896 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
6897 descriptors that are mostly or all zeros, with the expectation that they
6899 be filled in at runtime. iASL now allows this as long as there is a
6901 tag" (name) associated with the descriptor, which gives the ASL a handle
6902 needed to modify the descriptor. ACPICA BZ 873.
6904 Added single-thread support to the generic Unix application OSL.
6906 for iASL support, this change removes the use of semaphores in the
6908 threaded ACPICA tools/applications - increasing performance. The
6909 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
6910 option. ACPICA BZ 879.
6912 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
6914 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
6916 iASL: Moved all compiler messages to a new file, aslmessages.h.
6918 ----------------------------------------
6919 15 September 2010. Summary of changes for version 20100915:
6921 1) ACPI CA Core Subsystem:
6923 Removed the AcpiOsDerivePciId OSL interface. The various host
6925 of this function were not OS-dependent and are now obsolete and can be
6926 removed from all host OSLs. This function has been replaced by
6927 AcpiHwDerivePciId, which is now part of the ACPICA core code.
6928 AcpiHwDerivePciId has been implemented without recursion. Adds one new
6929 module, hwpci.c. ACPICA BZ 857.
6931 Implemented a dynamic repair for _HID and _CID strings. The following
6932 problems are now repaired at runtime: 1) Remove a leading asterisk in the
6933 string, and 2) the entire string is uppercased. Both repairs are in
6934 accordance with the ACPI specification and will simplify host driver
6938 The ACPI_THREAD_ID type is no longer configurable, internally it is now
6939 always UINT64. This simplifies the ACPICA code, especially any printf
6941 UINT64 is the only common data type for all thread_id types across all
6942 operating systems. It is now up to the host OSL to cast the native
6944 type to UINT64 before returning the value to ACPICA (via
6946 Lin Ming, Bob Moore.
6948 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
6950 keyword is not standard across compilers, and this type allows inline to
6952 configured on a per-compiler basis. Lin Ming.
6954 Made the system global AcpiGbl_SystemAwakeAndRunning publicly
6956 Added an extern for this boolean in acpixf.h. Some hosts utilize this
6958 during suspend/restore operations. ACPICA BZ 869.
6960 All code that implements error/warning messages with the "ACPI:" prefix
6962 been moved to a new module, utxferror.c.
6964 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
6966 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
6968 Example Code and Data Size: These are the sizes for the OS-independent
6969 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6970 debug version of the code includes the debug output trace mechanism and
6972 much larger code and data size.
6975 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6976 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6978 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6979 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6981 2) iASL Compiler/Disassembler and Tools:
6983 iASL/Disassembler: Write ACPI errors to stderr instead of the output
6985 This keeps the output files free of random error messages that may
6987 from within the namespace/interpreter code. Used this opportunity to
6989 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
6990 866. Lin Ming, Bob Moore.
6992 Tools: update some printfs for ansi warnings on size_t. Handle width
6994 of size_t on 32-bit versus 64-bit generations. Lin Ming.
6996 ----------------------------------------
6997 06 August 2010. Summary of changes for version 20100806:
6999 1) ACPI CA Core Subsystem:
7001 Designed and implemented a new host interface to the _OSI support code.
7003 will allow the host to dynamically add or remove multiple _OSI strings,
7005 well as install an optional handler that is called for each _OSI
7007 Also added a new AML debugger command, 'osi' to display and modify the
7009 _OSI string table, and test support in the AcpiExec utility. See the
7011 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
7013 AcpiInstallInterface - Add an _OSI string.
7014 AcpiRemoveInterface - Delete an _OSI string.
7015 AcpiInstallInterfaceHandler - Install optional _OSI handler.
7017 AcpiOsValidateInterface - no longer used.
7019 source/components/utilities/utosi.c
7021 Re-introduced the support to enable multi-byte transfers for Embedded
7022 Controller (EC) operation regions. A reported problem was found to be a
7024 in the host OS, not in the multi-byte support. Previously, the maximum
7026 size passed to the EC operation region handler was a single byte. There
7028 often EC Fields larger than one byte that need to be transferred, and it
7030 useful for the EC driver to lock these as a single transaction. This
7032 enables single transfers larger than 8 bits. This effectively changes the
7033 access to the EC space from ByteAcc to AnyAcc, and will probably require
7034 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
7036 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
7038 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
7039 prototype in acpiosxf.h had the output value pointer as a (void *).
7040 It should be a (UINT64 *). This may affect some host OSL code.
7042 Fixed a couple problems with the recently modified Linux makefiles for
7044 and AcpiExec. These new makefiles place the generated object files in the
7045 local directory so that there can be no collisions between the files that
7047 shared between them that are compiled with different options.
7049 Example Code and Data Size: These are the sizes for the OS-independent
7050 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7051 debug version of the code includes the debug output trace mechanism and
7053 much larger code and data size.
7056 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7057 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7059 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7060 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7062 2) iASL Compiler/Disassembler and Tools:
7064 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
7066 namespace from and disassemble an entire group of AML files. Useful for
7067 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
7069 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
7071 iASL: Allow multiple invocations of -e option. This change allows
7073 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
7077 ----------------------------------------
7078 02 July 2010. Summary of changes for version 20100702:
7080 1) ACPI CA Core Subsystem:
7082 Implemented several updates to the recently added GPE reference count
7083 support. The model for "wake" GPEs is changing to give the host OS
7085 control of these GPEs. Eventually, the ACPICA core will not execute any
7087 methods, since the host already must execute them. Also, additional
7089 were made to help ensure that the reference counts are kept in proper
7090 synchronization with reality. Rafael J. Wysocki.
7092 1) Ensure that GPEs are not enabled twice during initialization.
7093 2) Ensure that GPE enable masks stay in sync with the reference count.
7094 3) Do not inadvertently enable GPEs when writing GPE registers.
7095 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
7096 interface. This interface will set or clear individual GPEs for wakeup.
7097 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
7099 are now used for "runtime" GPEs only.
7101 Changed the behavior of the GPE install/remove handler interfaces. The
7104 no longer disabled during this process, as it was found to cause problems
7106 some machines. Rafael J. Wysocki.
7108 Reverted a change introduced in version 20100528 to enable Embedded
7109 Controller multi-byte transfers. This change was found to cause problems
7111 Index Fields and possibly Bank Fields. It will be reintroduced when these
7112 problems have been resolved.
7114 Fixed a problem with references to Alias objects within Package Objects.
7116 reference to an Alias within the definition of a Package was not always
7117 resolved properly. Aliases to objects like Processors, Thermal zones,
7119 were resolved to the actual object instead of a reference to the object
7122 should be. Package objects are only allowed to contain integer, string,
7123 buffer, package, and reference objects. Redhat bugzilla 608648.
7125 Example Code and Data Size: These are the sizes for the OS-independent
7126 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7127 debug version of the code includes the debug output trace mechanism and
7129 much larger code and data size.
7132 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7133 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7135 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7136 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7138 2) iASL Compiler/Disassembler and Tools:
7140 iASL: Implemented a new compiler subsystem to allow definition and
7141 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
7143 are called "ACPI Data Tables", and the new compiler is the "Data Table
7144 Compiler". This compiler is intended to simplify the existing error-prone
7145 process of creating these tables for the BIOS, as well as allowing the
7146 disassembly, modification, recompilation, and override of existing ACPI
7148 tables. See the iASL User Guide for detailed information.
7150 iASL: Implemented a new Template Generator option in support of the new
7152 Table Compiler. This option will create examples of all known ACPI tables
7153 that can be used as the basis for table development. See the iASL
7154 documentation and the -T option.
7156 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
7159 Updated the Linux makefiles for iASL and AcpiExec to place the generated
7160 object files in the local directory so that there can be no collisions
7161 between the shared files between them that are generated with different
7164 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
7166 the #define __APPLE__ to enable this support.
7168 ----------------------------------------
7169 28 May 2010. Summary of changes for version 20100528:
7171 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
7172 available at www.acpi.info. This is primarily an errata release.
7174 1) ACPI CA Core Subsystem:
7176 Undefined ACPI tables: We are looking for the definitions for the
7178 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
7180 Implemented support to enable multi-byte transfers for Embedded
7182 (EC) operation regions. Previously, the maximum data size passed to the
7184 operation region handler was a single byte. There are often EC Fields
7186 than one byte that need to be transferred, and it is useful for the EC
7188 to lock these as a single transaction. This change enables single
7190 larger than 8 bits. This effectively changes the access to the EC space
7192 ByteAcc to AnyAcc, and will probably require changes to the host OS
7194 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
7196 transfers. Alexey Starikovskiy, Lin Ming
7198 Implemented a performance enhancement for namespace search and access.
7200 change enhances the performance of namespace searches and walks by adding
7202 backpointer to the parent in each namespace node. On large namespaces,
7204 change can improve overall ACPI performance by up to 9X. Adding a pointer
7206 each namespace node increases the overall size of the internal namespace
7208 about 5%, since each namespace entry usually consists of both a namespace
7209 node and an ACPI operand object. However, this is the first growth of the
7210 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
7212 Implemented a performance optimization that reduces the number of
7214 walks. On control method exit, only walk the namespace if the method is
7216 to have created namespace objects outside of its local scope. Previously,
7218 entire namespace was traversed on each control method exit. This change
7220 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
7223 Added support to truncate I/O addresses to 16 bits for Windows
7225 Some ASL code has been seen in the field that inadvertently has bits set
7226 above bit 15. This feature is optional and is enabled if the BIOS
7228 any Windows OSI strings. It can also be enabled by the host OS. Matthew
7231 Added support to limit the maximum time for the ASL Sleep() operator. To
7232 prevent accidental deep sleeps, limit the maximum time that Sleep() will
7233 actually sleep. Configurable, the default maximum is two seconds. ACPICA
7236 Added run-time validation support for the _WDG and_WED Microsoft
7238 methods. These objects are defined by "Windows Instrumentation", and are
7240 part of the ACPI spec. ACPICA BZ 860.
7242 Expanded all statistic counters used during namespace and device
7243 initialization from 16 to 32 bits in order to support very large
7246 Replaced all instances of %d in printf format specifiers with %u since
7248 all integers in ACPICA are unsigned.
7250 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
7254 Example Code and Data Size: These are the sizes for the OS-independent
7255 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7256 debug version of the code includes the debug output trace mechanism and
7258 much larger code and data size.
7261 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7262 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7264 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7265 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7267 2) iASL Compiler/Disassembler and Tools:
7269 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
7270 methods. These objects are defined by "Windows Instrumentation", and are
7272 part of the ACPI spec. ACPICA BZ 860.
7274 AcpiExec: added option to disable the memory tracking mechanism. The -dt
7275 option will disable the tracking mechanism, which improves performance
7278 AcpiExec: Restructured the command line options into -d (disable) and -e
7281 ----------------------------------------
7282 28 April 2010. Summary of changes for version 20100428:
7284 1) ACPI CA Core Subsystem:
7286 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
7287 including FADT-based and GPE Block Devices, execute any _PRW methods in
7289 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
7290 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
7291 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
7292 Devices. Provides compatibility with other ACPI implementations. Two new
7293 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
7296 Fixed a regression introduced in version 20100331 within the table
7298 where initial table loading could fail. This was introduced in the fix
7300 AcpiReallocateRootTable. Also, renamed some of fields in the table
7302 data structures to clarify their meaning and use.
7304 Fixed a possible allocation overrun during internal object copy in
7305 AcpiUtCopySimpleObject. The original code did not correctly handle the
7307 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
7310 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
7311 possible access beyond end-of-allocation. Also, now fully validate
7313 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
7315 Example Code and Data Size: These are the sizes for the OS-independent
7316 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7317 debug version of the code includes the debug output trace mechanism and
7319 much larger code and data size.
7322 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7323 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7325 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7326 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7328 2) iASL Compiler/Disassembler and Tools:
7330 iASL: Implemented Min/Max/Len/Gran validation for address resource
7331 descriptors. This change implements validation for the address fields
7333 are common to all address-type resource descriptors. These checks are
7334 implemented: Checks for valid Min/Max, length within the Min/Max window,
7335 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
7337 table 6-40 in the ACPI 4.0a specification. Also split the large
7339 and aslrestype2.c files into five new files. ACPICA BZ 840.
7341 iASL: Added support for the _Wxx predefined names. This support was
7343 and these names were not recognized by the compiler as valid predefined
7344 names. ACPICA BZ 851.
7346 iASL: Added an error for all predefined names that are defined to return
7348 value and thus must be implemented as Control Methods. These include all
7350 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
7351 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
7353 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
7355 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
7357 dynamically loaded via the Load() operator. Also cleaned up output for
7360 ta and -tc options. ACPICA BZ 853.
7362 Tests: Added a new file with examples of extended iASL error checking.
7363 Demonstrates the advanced error checking ability of the iASL compiler.
7364 Available at tests/misc/badcode.asl.
7366 ----------------------------------------
7367 31 March 2010. Summary of changes for version 20100331:
7369 1) ACPI CA Core Subsystem:
7371 Completed a major update for the GPE support in order to improve support
7373 shared GPEs and to simplify both host OS and ACPICA code. Added a
7375 count mechanism to support shared GPEs that require multiple device
7377 Several external interfaces have changed. One external interface has been
7378 removed. One new external interface was added. Most of the GPE external
7379 interfaces now use the GPE spinlock instead of the events mutex (and the
7380 Flags parameter for many GPE interfaces has been removed.) See the
7382 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
7384 Wysocki. ACPICA BZ 831.
7387 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
7393 Implemented write support for DataTable operation regions. These regions
7395 defined via the DataTableRegion() operator. Previously, only read support
7397 implemented. The ACPI specification allows DataTableRegions to be
7401 Implemented a new subsystem option to force a copy of the DSDT to local
7402 memory. Optionally copy the entire DSDT to local memory (instead of
7404 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
7406 the original DSDT, creating the need for this option. Default is FALSE,
7410 Implemented detection of a corrupted or replaced DSDT. This change adds
7411 support to detect a DSDT that has been corrupted and/or replaced from
7413 the OS (by firmware). This is typically catastrophic for the system, but
7415 been seen on some machines. Once this problem has been detected, the DSDT
7416 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
7418 Fixed two problems with AcpiReallocateRootTable during the root table
7420 When copying the root table to the new allocation, the length used was
7421 incorrect. The new size was used instead of the current table size,
7423 too much data was copied. Also, the count of available slots for ACPI
7425 was not set correctly. Alexey Starikovskiy, Bob Moore.
7427 Example Code and Data Size: These are the sizes for the OS-independent
7428 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7429 debug version of the code includes the debug output trace mechanism and
7431 much larger code and data size.
7434 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7435 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7437 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7438 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7440 2) iASL Compiler/Disassembler and Tools:
7442 iASL: Implement limited typechecking for values returned from predefined
7443 control methods. The type of any returned static (unnamed) object is now
7444 validated. For example, Return(1). ACPICA BZ 786.
7446 iASL: Fixed a predefined name object verification regression. Fixes a
7448 introduced in version 20100304. An error is incorrectly generated if a
7449 predefined name is declared as a static named object with a value defined
7450 using the keywords "Zero", "One", or "Ones". Lin Ming.
7452 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
7454 reducing the requested registry access rights. ACPICA BZ 842.
7456 Disassembler: fixed a possible fault when generating External()
7458 Introduced in commit ae7d6fd: Properly handle externals with parent-
7460 (carat). Fixes a string length allocation calculation. Lin Ming.
7462 ----------------------------------------
7463 04 March 2010. Summary of changes for version 20100304:
7465 1) ACPI CA Core Subsystem:
7467 Fixed a possible problem with the AML Mutex handling function
7468 AcpiExReleaseMutex where the function could fault under the very rare
7469 condition when the interpreter has blocked, the interpreter lock is
7471 the interpreter is then reentered via the same thread, and attempts to
7472 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
7476 Implemented additional configuration support for the AML "Debug Object".
7477 Output from the debug object can now be enabled via a global variable,
7478 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
7480 This debug output is now available in the release version of ACPICA
7482 of just the debug version. Also, the entire debug output module can now
7484 configured out of the ACPICA build if desired. One new file added,
7485 executer/exdebug.c. Lin Ming, Bob Moore.
7487 Added header support for the ACPI MCHI table (Management Controller Host
7488 Interface Table). This table was added in ACPI 4.0, but the defining
7490 has only recently become available.
7492 Standardized output of integer values for ACPICA warnings/errors. Always
7494 0x prefix for hex output, always use %u for unsigned integer decimal
7496 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
7498 invocations.) These invocations were converted from the original
7499 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
7501 Example Code and Data Size: These are the sizes for the OS-independent
7502 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7503 debug version of the code includes the debug output trace mechanism and
7505 much larger code and data size.
7508 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7509 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7511 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7512 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7514 2) iASL Compiler/Disassembler and Tools:
7516 iASL: Implemented typechecking support for static (non-control method)
7517 predefined named objects that are declared with the Name() operator. For
7518 example, the type of this object is now validated to be of type Integer:
7519 Name(_BBN, 1). This change migrates the compiler to using the core
7521 name table instead of maintaining a local version. Added a new file,
7522 aslpredef.c. ACPICA BZ 832.
7524 Disassembler: Added support for the ACPI 4.0 MCHI table.
7526 ----------------------------------------
7527 21 January 2010. Summary of changes for version 20100121:
7529 1) ACPI CA Core Subsystem:
7531 Added the 2010 copyright to all module headers and signons. This affects
7532 virtually every file in the ACPICA core subsystem, the iASL compiler, the
7533 tools/utilities, and the test suites.
7535 Implemented a change to the AcpiGetDevices interface to eliminate
7537 invocations of the _STA method. In the case where a specific _HID is
7538 requested, do not run _STA until a _HID match is found. This eliminates
7539 potentially dozens of _STA calls during a search for a particular
7541 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
7543 Implemented an additional repair for predefined method return values.
7545 to repair unexpected NULL elements within returned Package objects.
7548 Integer of value zero, a NULL String, or a zero-length Buffer as
7550 ACPICA BZ 818. Lin Ming, Bob Moore.
7552 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
7554 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
7556 64-bit AML integers). It is now obsolete and this change removes it from
7558 ACPICA code base, replaced by UINT64. The original typedef has been
7560 for now for compatibility with existing device driver code. ACPICA BZ
7563 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
7565 the parse tree object.
7567 Added additional warning options for the gcc-4 generation. Updated the
7569 accordingly. This includes some code restructuring to eliminate
7571 code, elimination of some gotos, elimination of unused return values,
7573 additional casting, and removal of redundant declarations.
7575 Example Code and Data Size: These are the sizes for the OS-independent
7576 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7577 debug version of the code includes the debug output trace mechanism and
7579 much larger code and data size.
7582 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7583 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7585 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7586 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7588 2) iASL Compiler/Disassembler and Tools:
7590 No functional changes for this release.
7592 ----------------------------------------
7593 14 December 2009. Summary of changes for version 20091214:
7595 1) ACPI CA Core Subsystem:
7597 Enhanced automatic data type conversions for predefined name repairs.
7599 change expands the automatic repairs/conversions for predefined name
7601 values to make Integers, Strings, and Buffers fully interchangeable.
7604 Buffer can be converted to a Package of Integers if necessary. The
7606 module was completely restructured. Lin Ming, Bob Moore.
7608 Implemented automatic removal of null package elements during predefined
7610 repairs. This change will automatically remove embedded and trailing NULL
7611 package elements from returned package objects that are defined to
7614 variable number of sub-packages. The driver is then presented with a
7616 with no null elements to deal with. ACPICA BZ 819.
7618 Implemented a repair for the predefined _FDE and _GTM names. The expected
7619 return value for both names is a Buffer of 5 DWORDs. This repair fixes
7621 possible problems (both seen in the field), where a package of integers
7623 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
7626 Implemented additional module-level code support. This change will
7628 execute module-level code that is not at the root of the namespace (under
7630 Device object, etc.). Now executes the code within the current scope
7632 of the root. ACPICA BZ 762. Lin Ming.
7634 Fixed possible mutex acquisition errors when running _REG methods. Fixes
7636 problem where mutex errors can occur when running a _REG method that is
7638 the same scope as a method-defined operation region or an operation
7640 under a module-level IF block. This type of code is rare, so the problem
7642 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
7644 Fixed a possible memory leak during module-level code execution. An
7646 could be leaked for each block of executed module-level code if the
7647 interpreter slack mode is enabled This change deletes any implicitly
7649 object from the module-level code block. Lin Ming.
7651 Removed messages for successful predefined repair(s). The repair
7653 was considered too wordy. Now, messages are only unconditionally emitted
7655 the return object cannot be repaired. Existing messages for successful
7656 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
7659 Example Code and Data Size: These are the sizes for the OS-independent
7660 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7661 debug version of the code includes the debug output trace mechanism and
7663 much larger code and data size.
7666 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7667 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7669 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7670 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7672 2) iASL Compiler/Disassembler and Tools:
7674 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
7676 were no longer automatically removed at the termination of the compile.
7678 acpiexec: Implemented the -f option to specify default region fill value.
7679 This option specifies the value used to initialize buffers that simulate
7680 operation regions. Default value is zero. Useful for debugging problems
7682 depend on a specific initial value for a region or field.
7684 ----------------------------------------
7685 12 November 2009. Summary of changes for version 20091112:
7687 1) ACPI CA Core Subsystem:
7689 Implemented a post-order callback to AcpiWalkNamespace. The existing
7690 interface only has a pre-order callback. This change adds an additional
7691 parameter for a post-order callback which will be more useful for bus
7693 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
7695 Modified the behavior of the operation region memory mapping cache for
7696 SystemMemory. Ensure that the memory mappings created for operation
7698 do not cross 4K page boundaries. Crossing a page boundary while mapping
7699 regions can cause kernel warnings on some hosts if the pages have
7701 attributes. Such regions are probably BIOS bugs, and this is the
7703 Linux BZ 14445. Lin Ming.
7705 Implemented an automatic repair for predefined methods that must return
7706 sorted lists. This change will repair (by sorting) packages returned by
7708 _PSS, and _TSS. Drivers can now assume that the packages are correctly
7710 and do not contain NULL package elements. Adds one new file,
7711 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
7713 Fixed a possible fault during predefined name validation if a return
7715 object contains NULL elements. Also adds a warning if a NULL element is
7716 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
7718 include repair or removal of all such NULL elements where possible.
7720 Implemented additional module-level executable AML code support. This
7722 will execute module-level code that is not at the root of the namespace
7723 (under a Device object, etc.) at table load time. Module-level executable
7725 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
7727 Implemented a new internal function to create Integer objects. This
7729 simplifies miscellaneous object creation code. ACPICA BZ 823.
7731 Reduced the severity of predefined repair messages, Warning to Info.
7733 the object was successfully repaired, a warning is too severe. Reduced to
7735 info message for now. These messages may eventually be changed to debug-
7739 Example Code and Data Size: These are the sizes for the OS-independent
7740 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7741 debug version of the code includes the debug output trace mechanism and
7743 much larger code and data size.
7746 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7747 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7749 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7750 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7752 2) iASL Compiler/Disassembler and Tools:
7754 iASL: Implemented Switch() with While(1) so that Break works correctly.
7756 change correctly implements the Switch operator with a surrounding
7758 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
7760 iASL: Added a message if a package initializer list is shorter than
7762 length. Adds a new remark for a Package() declaration if an initializer
7764 exists, but is shorter than the declared length of the package. Although
7765 technically legal, this is probably a coding error and it is seen in the
7766 field. ACPICA BZ 815. Lin Ming, Bob Moore.
7768 iASL: Fixed a problem where the compiler could fault after the maximum
7770 of errors was reached (200).
7772 acpixtract: Fixed a possible warning for pointer cast if the compiler
7774 level set very high.
7776 ----------------------------------------
7777 13 October 2009. Summary of changes for version 20091013:
7779 1) ACPI CA Core Subsystem:
7781 Fixed a problem where an Operation Region _REG method could be executed
7783 than once. If a custom address space handler is installed by the host
7785 the "initialize operation regions" phase of the ACPICA initialization,
7787 _REG methods for that address space could be executed twice. This change
7788 fixes the problem. ACPICA BZ 427. Lin Ming.
7790 Fixed a possible memory leak for the Scope() ASL operator. When the exact
7791 invocation of "Scope(\)" is executed (change scope to root), one internal
7792 operand object was leaked. Lin Ming.
7794 Implemented a run-time repair for the _MAT predefined method. If the _MAT
7795 return value is defined as a Field object in the AML, and the field
7796 size is less than or equal to the default width of an integer (32 or
7798 can incorrectly return an Integer instead of a Buffer. ACPICA now
7799 automatically repairs this problem. ACPICA BZ 810.
7801 Implemented a run-time repair for the _BIF and _BIX predefined methods.
7803 "OEM Information" field is often incorrectly returned as an Integer with
7804 value zero if the field is not supported by the platform. This is due to
7806 ambiguity in the ACPI specification. The field should always be a string.
7807 ACPICA now automatically repairs this problem by returning a NULL string
7808 within the returned Package. ACPICA BZ 807.
7810 Example Code and Data Size: These are the sizes for the OS-independent
7811 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7812 debug version of the code includes the debug output trace mechanism and
7814 much larger code and data size.
7817 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7818 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7820 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7821 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7823 2) iASL Compiler/Disassembler and Tools:
7825 Disassembler: Fixed a problem where references to external symbols that
7826 contained one or more parent-prefixes (carats) were not handled
7828 possibly causing a fault. ACPICA BZ 806. Lin Ming.
7830 Disassembler: Restructured the code so that all functions that handle
7831 external symbols are in a single module. One new file is added,
7834 AML Debugger: Added a max count argument for the Batch command (which
7835 executes multiple predefined methods within the namespace.)
7837 iASL: Updated the compiler documentation (User Reference.) Available at
7838 http://www.acpica.org/documentation/. ACPICA BZ 750.
7840 AcpiXtract: Updated for Lint and other formatting changes. Close all open
7843 ----------------------------------------
7844 03 September 2009. Summary of changes for version 20090903:
7846 1) ACPI CA Core Subsystem:
7848 For Windows Vista compatibility, added the automatic execution of an _INI
7849 method located at the namespace root (\_INI). This method is executed at
7850 table load time. This support is in addition to the automatic execution
7852 \_SB._INI. Lin Ming.
7854 Fixed a possible memory leak in the interpreter for AML package objects
7856 the package initializer list is longer than the defined size of the
7858 This apparently can only happen if the BIOS changes the package size on
7860 fly (seen in a _PSS object), as ASL compilers do not allow this. The
7861 interpreter will truncate the package to the defined size (and issue an
7863 message), but previously could leave the extra objects undeleted if they
7865 pre-created during the argument processing (such is the case if the
7867 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
7869 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
7870 This has been reported in the field. Previously, ACPICA would zero out
7872 buffer/string. Now, the operation is treated as a noop. Provides Windows
7873 compatibility. ACPICA BZ 803. Lin Ming.
7875 Removed an extraneous error message for ASL constructs of the form
7876 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
7878 are seen in many BIOSs and are once again treated as NOOPs and no error
7880 emitted when they are encountered. ACPICA BZ 785.
7882 Fixed an extraneous warning message if a _DSM reserved method returns a
7883 Package object. _DSM can return any type of object, so validation on the
7884 return type cannot be performed. ACPICA BZ 802.
7886 Example Code and Data Size: These are the sizes for the OS-independent
7887 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7888 debug version of the code includes the debug output trace mechanism and
7890 much larger code and data size.
7893 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7894 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7896 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7897 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7899 2) iASL Compiler/Disassembler and Tools:
7901 iASL: Fixed a problem with the use of the Alias operator and Resource
7902 Templates. The correct alias is now constructed and no error is emitted.
7905 iASL: Implemented the -I option to specify additional search directories
7907 include files. Allows multiple additional search paths for include files.
7908 Directories are searched in the order specified on the command line
7910 the local directory is searched.) ACPICA BZ 800.
7912 iASL: Fixed a problem where the full pathname for include files was not
7913 emitted for warnings/errors. This caused the IDE support to not work
7914 properly. ACPICA BZ 765.
7916 iASL: Implemented the -@ option to specify a Windows-style response file
7917 containing additional command line options. ACPICA BZ 801.
7919 AcpiExec: Added support to load multiple AML files simultaneously (such
7922 DSDT and multiple SSDTs). Also added support for wildcards within the AML
7923 pathname. These features allow all machine tables to be easily loaded and
7924 debugged together. ACPICA BZ 804.
7926 Disassembler: Added missing support for disassembly of HEST table Error
7930 ----------------------------------------
7931 30 July 2009. Summary of changes for version 20090730:
7933 The ACPI 4.0 implementation for ACPICA is complete with this release.
7935 1) ACPI CA Core Subsystem:
7937 ACPI 4.0: Added header file support for all new and changed ACPI tables.
7938 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
7940 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
7942 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
7944 have been some ACPI 4.0 changes to other existing tables. Split the large
7945 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
7947 ACPI 4.0: Implemented predefined name validation for all new names. There
7949 31 new names in ACPI 4.0. The predefined validation module was split into
7951 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
7953 Implemented support for so-called "module-level executable code". This is
7954 executable AML code that exists outside of any control method and is
7956 to be executed at table load time. Although illegal since ACPI 2.0, this
7958 of code still exists and is apparently still being created. Blocks of
7960 code are now detected and executed as intended. Currently, the code
7962 must exist under either an If, Else, or While construct; these are the
7963 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
7965 Implemented an automatic dynamic repair for predefined names that return
7966 nested Package objects. This applies to predefined names that are defined
7968 return a variable-length Package of sub-packages. If the number of sub-
7969 packages is one, BIOS code is occasionally seen that creates a simple
7971 package with no sub-packages. This code attempts to fix the problem by
7972 wrapping a new package object around the existing package. These methods
7974 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
7978 Fixed a regression introduced in 20090625 for the AcpiGetDevices
7980 The _HID/_CID matching was broken and no longer matched IDs correctly.
7984 Fixed a problem with AcpiReset where the reset would silently fail if the
7985 register was one of the protected I/O ports. AcpiReset now bypasses the
7987 validation mechanism. This may eventually be driven into the
7991 Fixed a regression related to the recent update of the AcpiRead/Write
7992 interfaces. A sleep/suspend could fail if the optional PM2 Control
7994 does not exist during an attempt to write the Bus Master Arbitration bit.
7995 (However, some hosts already delete the code that writes this bit, and
7997 code may in fact be obsolete at this date.) ACPICA BZ 799.
7999 Fixed a problem where AcpiTerminate could fault if inadvertently called
8001 in succession. ACPICA BZ 795.
8003 Example Code and Data Size: These are the sizes for the OS-independent
8004 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8005 debug version of the code includes the debug output trace mechanism and
8007 much larger code and data size.
8010 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8011 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8013 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
8014 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
8016 2) iASL Compiler/Disassembler and Tools:
8018 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
8019 changes to existing tables. ACPICA BZ 775.
8021 ----------------------------------------
8022 25 June 2009. Summary of changes for version 20090625:
8024 The ACPI 4.0 Specification was released on June 16 and is available at
8025 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
8026 continue for the next few releases.
8028 1) ACPI CA Core Subsystem:
8030 ACPI 4.0: Implemented interpreter support for the IPMI operation region
8031 address space. Includes support for bi-directional data buffers and an
8033 address space handler (to be installed by an IPMI device driver.) ACPICA
8037 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
8039 support in both the header files and the disassembler.
8041 Completed a major update for the AcpiGetObjectInfo external interface.
8043 - Support for variable, unlimited length HID, UID, and CID strings.
8044 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
8046 - Call the _SxW power methods on behalf of a device object.
8047 - Determine if a device is a PCI root bridge.
8048 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
8049 These changes will require an update to all callers of this interface.
8051 the updated ACPICA Programmer Reference for details. One new source file
8053 been added - utilities/utids.c. ACPICA BZ 368, 780.
8055 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
8056 transfers. The Value parameter has been extended from 32 bits to 64 bits
8058 order to support new ACPI 4.0 tables. These changes will require an
8061 all callers of these interfaces. See the ACPICA Programmer Reference for
8062 details. ACPICA BZ 768.
8064 Fixed several problems with AcpiAttachData. The handler was not invoked
8066 the host node was deleted. The data sub-object was not automatically
8068 when the host node was deleted. The interface to the handler had an
8070 parameter, this was removed. ACPICA BZ 778.
8072 Enhanced the function that dumps ACPI table headers. All non-printable
8073 characters in the string fields are now replaced with '?' (Signature,
8075 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
8076 these fields are occasionally seen in the field. ACPICA BZ 788.
8078 Fixed a problem with predefined method repair code where the code that
8079 attempts to repair/convert an object of incorrect type is only executed
8081 the first time the predefined method is called. The mechanism that
8083 warnings on subsequent calls was interfering with the repair mechanism.
8086 Fixed a possible memory leak in the predefined validation/repair code
8089 buffer is automatically converted to an expected string object.
8091 Removed obsolete 16-bit files from the distribution and from the current
8093 tree head. ACPICA BZ 776.
8095 Example Code and Data Size: These are the sizes for the OS-independent
8096 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8097 debug version of the code includes the debug output trace mechanism and
8099 much larger code and data size.
8102 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8103 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8105 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8106 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8108 2) iASL Compiler/Disassembler and Tools:
8110 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
8111 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
8113 ACPI 4.0: iASL - implemented compile-time validation support for all new
8114 predefined names and control methods (31 total). ACPICA BZ 769.
8116 ----------------------------------------
8117 21 May 2009. Summary of changes for version 20090521:
8119 1) ACPI CA Core Subsystem:
8121 Disabled the preservation of the SCI enable bit in the PM1 control
8123 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
8126 a "preserved" bit - "OSPM always preserves this bit position", section
8127 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
8128 because the bit needs to be explicitly set by the OS as a workaround. No
8129 machines fail if the bit is not preserved. Therefore, ACPICA no longer
8130 attempts to preserve this bit.
8132 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
8133 incorrectly formed _PRT package could cause a fault. Added validation to
8134 ensure that each package element is actually a sub-package.
8136 Implemented a new interface to install or override a single control
8138 AcpiInstallMethod. This interface is useful when debugging in order to
8140 an existing method or to install a missing method without having to
8142 the entire ACPI table. See the ACPICA Programmer Reference for use and
8143 examples. Lin Ming, Bob Moore.
8145 Fixed several reference count issues with the DdbHandle object that is
8146 created from a Load or LoadTable operator. Prevent premature deletion of
8148 object. Also, mark the object as invalid once the table has been
8150 This is needed because the handle itself may not be deleted after the
8152 unload, depending on whether it has been stored in a named object by the
8155 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
8156 mutexes of the same sync level are acquired but then not released in
8158 opposite order, the internally maintained Current Sync Level becomes
8160 and can cause subsequent execution errors. ACPICA BZ 471.
8162 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
8163 specification has been changed to make the SyncLevel for mutex objects
8165 useful. When releasing a mutex, the SyncLevel of the mutex must now be
8167 same as the current sync level. This makes more sense than the previous
8169 (SyncLevel less than or equal). This change updates the code to match the
8172 Fixed a problem with the local version of the AcpiOsPurgeCache function.
8174 (local) cache must be locked during all cache object deletions. Andrew
8177 Updated the Load operator to use operation region interfaces. This
8179 direct memory mapping with region access calls. Now, all region accesses
8181 through the installed region handler as they should.
8183 Simplified and optimized the NsGetNextNode function. Reduced parameter
8185 and reduced code for this frequently used function.
8187 Example Code and Data Size: These are the sizes for the OS-independent
8188 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8189 debug version of the code includes the debug output trace mechanism and
8191 much larger code and data size.
8194 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8195 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8197 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8198 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8200 2) iASL Compiler/Disassembler and Tools:
8202 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
8204 with sub-table disassembly and handling invalid sub-tables. Attempt
8206 after an invalid sub-table ID.
8208 ----------------------------------------
8209 22 April 2009. Summary of changes for version 20090422:
8211 1) ACPI CA Core Subsystem:
8213 Fixed a compatibility issue with the recently released I/O port
8215 mechanism. For windows compatibility, 1) On a port protection violation,
8216 simply ignore the request and do not return an exception (allow the
8218 method to continue execution.) 2) If only part of the request overlaps a
8219 protected port, read/write the individual ports that are not protected.
8223 Enhanced the execution of the ASL/AML BreakPoint operator so that it
8225 breaks into the AML debugger if the debugger is present. This matches the
8226 ACPI-defined behavior.
8228 Fixed several possible warnings related to the use of the configurable
8229 ACPI_THREAD_ID. This type can now be configured as either an integer or a
8230 pointer with no warnings. Also fixes several warnings in printf-like
8231 statements for the 64-bit build when the type is configured as a pointer.
8234 Fixed a number of possible warnings when compiling with gcc 4+ (depending
8236 warning options.) Examples include printf formats, aliasing, unused
8238 missing prototypes, missing switch default statements, use of non-ANSI
8239 library functions, use of non-ANSI constructs. See generate/unix/Makefile
8241 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
8243 Example Code and Data Size: These are the sizes for the OS-independent
8244 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8245 debug version of the code includes the debug output trace mechanism and
8247 much larger code and data size.
8250 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8251 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8253 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8254 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8256 2) iASL Compiler/Disassembler and Tools:
8258 iASL: Fixed a generation warning from Bison 2.3 and fixed several
8263 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
8265 correctly digest Windows/DOS formatted files (with CR/LF).
8267 iASL: Added a new option for "quiet mode" (-va) that produces only the
8268 compilation summary, not individual errors and warnings. Useful for large
8271 AcpiExec: Implemented a new option (-z) to enable a forced
8273 timeout that can be used to detect hang conditions during execution of
8275 code (includes both internal semaphores and AML-defined mutexes and
8278 Added new makefiles for the generation of acpica in a generic unix-like
8279 environment. These makefiles are intended to generate the acpica tools
8281 utilities from the original acpica git source tree structure.
8283 Test Suites: Updated and cleaned up the documentation files. Updated the
8284 copyrights to 2009, affecting all source files. Use the new version of
8286 with quiet mode. Increased the number of available semaphores in the
8288 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
8290 an alternate implementation of the semaphore timeout to allow aslts to
8291 execute fully on Cygwin.
8293 ----------------------------------------
8294 20 March 2009. Summary of changes for version 20090320:
8296 1) ACPI CA Core Subsystem:
8298 Fixed a possible race condition between AcpiWalkNamespace and dynamic
8300 unloads. Added a reader/writer locking mechanism to allow multiple
8302 namespace walks (readers), but block a dynamic table unload until it can
8304 exclusive write access to the namespace. This fixes a problem where a
8306 unload could (possibly catastrophically) delete the portion of the
8308 that is currently being examined by a walk. Adds a new file, utlock.c,
8310 implements the reader/writer lock mechanism. ACPICA BZ 749.
8312 Fixed a regression introduced in version 20090220 where a change to the
8314 handling could cause the ACPICA subsystem to access non-existent I/O
8317 Modified the handling of FADT register and table (FACS/DSDT) addresses.
8319 FADT can contain both 32-bit and 64-bit versions of these addresses.
8320 Previously, the 64-bit versions were favored, meaning that if both 32 and
8322 versions were valid, but not equal, the 64-bit version was used. This was
8323 found to cause some machines to fail. Now, in this case, the 32-bit
8325 is used instead. This now matches the Windows behavior.
8327 Implemented a new mechanism to protect certain I/O ports. Provides
8329 compatibility and protects the standard PC I/O ports from access via AML
8330 code. Adds a new file, hwvalid.c
8332 Fixed a possible extraneous warning message from the FADT support. The
8333 message warns of a 32/64 length mismatch between the legacy and GAS
8334 definitions for a register.
8336 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
8338 made obsolete by the port protection mechanism above. It was previously
8340 to validate the entire address range of an operation region, which could
8342 incorrect if the range included illegal ports, but fields within the
8343 operation region did not actually access those ports. Validation is now
8344 performed on a per-field basis instead of the entire region.
8346 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
8347 Ignored bits must be "preserved" according to the ACPI spec. Usually,
8349 means a read/modify/write when writing to the register. However, for
8351 registers, writing a one means clear the event. Writing a zero means
8353 the event (do not clear.) This behavior is clarified in the ACPI 4.0
8355 and the ACPICA code now simply always writes a zero to the ignored bit.
8357 Modified the handling of ignored bits for the PM1 A/B Control Registers.
8359 per the ACPI specification, for the control registers, preserve
8360 (read/modify/write) all bits that are defined as either reserved or
8363 Updated the handling of write-only bits in the PM1 A/B Control Registers.
8364 When reading the register, zero the write-only bits as per the ACPI spec.
8365 ACPICA BZ 443. Lin Ming.
8367 Removed "Linux" from the list of supported _OSI strings. Linux no longer
8368 wants to reply true to this request. The Windows strings are the only
8370 through the AML that are tested and known to work properly.
8373 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8374 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8376 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8377 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8379 2) iASL Compiler/Disassembler and Tools:
8381 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
8385 ----------------------------------------
8386 20 February 2009. Summary of changes for version 20090220:
8388 1) ACPI CA Core Subsystem:
8390 Optimized the ACPI register locking. Removed locking for reads from the
8392 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
8394 not required when reading the single-bit registers. The
8395 AcpiGetRegisterUnlocked function is no longer needed and has been
8397 This will improve performance for reads on these registers. ACPICA BZ
8400 Fixed the parameter validation for AcpiRead/Write. Now return
8401 AE_BAD_PARAMETER if the input register pointer is null, and
8404 the register has an address of zero. Previously, these cases simply
8406 AE_OK. For optional registers such as PM1B status/enable/control, the
8408 should check for a valid register address before calling. ACPICA BZ 748.
8410 Renamed the external ACPI bit register access functions. Renamed
8411 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
8412 functions. The new names are AcpiReadBitRegister and
8413 AcpiWriteBitRegister.
8414 Also, restructured the code for these functions by simplifying the code
8416 and condensing duplicate code to reduce code size.
8418 Added new functions to transparently handle the possibly split PM1 A/B
8419 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
8421 now handle the split registers for PM1 Status, Enable, and Control.
8426 Added a function to handle the PM1 control registers,
8427 AcpiHwWritePm1Control.
8428 This function writes both of the PM1 control registers (A/B). These
8430 are different than the PM1 A/B status and enable registers in that
8432 values can be written to the A/B registers. Most notably, the SLP_TYP
8434 can be different, as per the values returned from the _Sx predefined
8437 Removed an extra register write within AcpiHwClearAcpiStatus. This
8439 was writing an optional PM1B status register twice. The existing call to
8441 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
8443 register. ACPICA BZ 751.
8445 Split out the PM1 Status registers from the FADT. Added new globals for
8447 registers (A/B), similar to the way the PM1 Enable registers are handled.
8448 Instead of overloading the FADT Event Register blocks. This makes the
8450 clearer and less prone to error.
8452 Fixed the warning message for when the platform contains too many ACPI
8454 for the default size of the global root table data structure. The
8456 for the truncation value was incorrect.
8458 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
8459 obsolete macro, since it is now a simple reference to ->common.type.
8461 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
8463 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
8464 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
8465 simply SLEEP_TYPE. ACPICA BZ 754.
8467 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
8468 function is only needed on 64-bit host operating systems and is thus not
8469 included for 32-bit hosts.
8471 Debug output: print the input and result for invocations of the _OSI
8473 control method via the ACPI_LV_INFO debug level. Also, reduced some of
8475 verbosity of this debug level. Len Brown.
8477 Example Code and Data Size: These are the sizes for the OS-independent
8478 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8479 debug version of the code includes the debug output trace mechanism and
8481 much larger code and data size.
8484 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8485 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8487 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8488 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8490 2) iASL Compiler/Disassembler and Tools:
8492 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
8493 various legal performance profiles.
8495 ----------------------------------------
8496 23 January 2009. Summary of changes for version 20090123:
8498 1) ACPI CA Core Subsystem:
8500 Added the 2009 copyright to all module headers and signons. This affects
8501 virtually every file in the ACPICA core subsystem, the iASL compiler, and
8502 the tools/utilities.
8504 Implemented a change to allow the host to override any ACPI table,
8506 dynamically loaded tables. Previously, only the DSDT could be replaced by
8508 host. With this change, the AcpiOsTableOverride interface is called for
8510 table found in the RSDT/XSDT during ACPICA initialization, and also
8512 a table is dynamically loaded via the AML Load operator.
8514 Updated FADT flag definitions, especially the Boot Architecture flags.
8516 Debugger: For the Find command, automatically pad the input ACPI name
8518 underscores if the name is shorter than 4 characters. This enables a
8520 with the actual namespace entry which is itself padded with underscores.
8522 Example Code and Data Size: These are the sizes for the OS-independent
8523 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8524 debug version of the code includes the debug output trace mechanism and
8526 much larger code and data size.
8529 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8530 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8532 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8533 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8535 2) iASL Compiler/Disassembler and Tools:
8537 Fix build error under Bison-2.4.
8539 Dissasembler: Enhanced FADT support. Added decoding of the Boot
8541 flags. Now decode all flags, regardless of the FADT version. Flag output
8542 includes the FADT version which first defined each flag.
8544 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
8546 DSDT). Windows only.
8548 ----------------------------------------
8549 04 December 2008. Summary of changes for version 20081204:
8551 1) ACPI CA Core Subsystem:
8553 The ACPICA Programmer Reference has been completely updated and revamped
8555 this release. This includes updates to the external interfaces, OSL
8556 interfaces, the overview sections, and the debugger reference.
8558 Several new ACPICA interfaces have been implemented and documented in the
8559 programmer reference:
8560 AcpiReset - Writes the reset value to the FADT-defined reset register.
8561 AcpiDisableAllGpes - Disable all available GPEs.
8562 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
8563 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
8564 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
8565 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
8566 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
8568 Most of the public ACPI hardware-related interfaces have been moved to a
8570 file, components/hardware/hwxface.c
8572 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
8573 register lengths within the FADT are now used, and the low level ACPI
8574 register access no longer hardcodes the ACPI register lengths. Given that
8575 there may be some risk in actually trusting the FADT register lengths, a
8577 time option was added to fall back to the default hardcoded lengths if
8579 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
8580 option is set to true for now, and a warning is issued if a suspicious
8582 register length is overridden with the default value.
8584 Fixed a reference count issue in NsRepairObject. This problem was
8586 in version 20081031 as part of a fix to repair Buffer objects within
8589 Added semaphore support to the Linux/Unix application OS-services layer
8590 (OSL). ACPICA BZ 448. Lin Ming.
8592 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
8594 be implemented in the OSL, or will binary semaphores be used instead.
8596 Example Code and Data Size: These are the sizes for the OS-independent
8597 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8598 debug version of the code includes the debug output trace mechanism and
8600 much larger code and data size.
8603 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8604 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8606 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8607 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8609 2) iASL Compiler/Disassembler and Tools:
8611 iASL: Completed the '-e' option to include additional ACPI tables in
8614 aid with disassembly and External statement generation. ACPICA BZ 742.
8618 iASL: Removed the "named object in while loop" error. The compiler cannot
8619 determine how many times a loop will execute. ACPICA BZ 730.
8621 Disassembler: Implemented support for FADT revision 2 (MS extension).
8625 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
8628 ----------------------------------------
8629 31 October 2008. Summary of changes for version 20081031:
8631 1) ACPI CA Core Subsystem:
8633 Restructured the ACPICA header files into public/private. acpi.h now
8635 only the "public" acpica headers. All other acpica headers are "private"
8637 should not be included by acpica users. One new file, accommon.h is used
8639 include the commonly used private headers for acpica code generation.
8641 plans include moving all private headers to a new subdirectory.
8643 Implemented an automatic Buffer->String return value conversion for
8644 predefined ACPI methods. For these methods (such as _BIF), added
8646 conversion for return objects that are required to be a String, but a
8648 was found instead. This can happen when reading string battery data from
8650 operation region, because it used to be difficult to convert the data
8652 buffer to string from within the ASL. Ensures that the host OS is
8654 with a valid null-terminated string. Linux BZ 11822.
8656 Updated the FACS waking vector interfaces. Split
8657 AcpiSetFirmwareWakingVector
8658 into two: one for the 32-bit vector, another for the 64-bit vector. This
8660 required because the host OS must setup the wake much differently for
8662 vector (real vs. protected mode, etc.) and the interface itself should
8665 deciding which vector to use. Also, eliminated the
8666 GetFirmwareWakingVector
8667 interface, as it served no purpose (only the firmware reads the vector,
8669 only writes the vector.) ACPICA BZ 731.
8671 Implemented a mechanism to escape infinite AML While() loops. Added a
8673 counter to force exit from AML While loops if the count becomes too
8675 This can occur in poorly written AML when the hardware does not respond
8676 within a while loop and the loop does not implement a timeout. The
8678 loop count is configurable. A new exception code is returned when a loop
8680 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
8682 Optimized the execution of AML While loops. Previously, a control state
8683 object was allocated and freed for each execution of the loop. The
8684 optimization is to simply reuse the control state for each iteration.
8686 speeds up the raw loop execution time by about 5%.
8688 Enhanced the implicit return mechanism. For Windows compatibility, return
8690 implicit integer of value zero for methods that contain no executable
8692 Such methods are seen in the field as stubs (presumably), and can cause
8693 drivers to fail if they expect a return value. Lin Ming.
8695 Allow multiple backslashes as root prefixes in namepaths. In a fully
8696 qualified namepath, allow multiple backslash prefixes. This can happen
8698 is seen in the field) because of the use of a double-backslash in strings
8699 (since backslash is the escape character) causing confusion. ACPICA BZ
8703 Emit a warning if two different FACS or DSDT tables are discovered in the
8704 FADT. Checks if there are two valid but different addresses for the FACS
8706 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
8708 Consolidated the method argument count validation code. Merged the code
8710 validates control method argument counts into the predefined validation
8711 module. Eliminates possible multiple warnings for incorrect argument
8714 Implemented ACPICA example code. Includes code for ACPICA initialization,
8715 handler installation, and calling a control method. Available at
8716 source/tools/examples.
8718 Added a global pointer for FACS table to simplify internal FACS access.
8720 the global pointer instead of using AcpiGetTableByIndex for each FACS
8722 This simplifies the code for the Global Lock and the Firmware Waking
8725 Example Code and Data Size: These are the sizes for the OS-independent
8726 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8727 debug version of the code includes the debug output trace mechanism and
8729 much larger code and data size.
8732 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8733 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8735 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8736 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8738 2) iASL Compiler/Disassembler and Tools:
8740 iASL: Improved disassembly of external method calls. Added the -e option
8742 allow the inclusion of additional ACPI tables to help with the
8745 method invocations and the generation of external declarations during the
8746 disassembly. Certain external method invocations cannot be disassembled
8747 properly without the actual declaration of the method. Use the -e option
8749 include the table where the external method(s) are actually declared.
8751 useful for disassembling SSDTs that make method calls back to the master
8752 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
8754 -e dsdt.aml ssdt1.aml
8756 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
8757 problem where the use of an alias within a namepath would result in a not
8758 found error or cause the compiler to fault. Also now allows forward
8759 references from the Alias operator itself. ACPICA BZ 738.
8761 ----------------------------------------
8762 26 September 2008. Summary of changes for version 20080926:
8764 1) ACPI CA Core Subsystem:
8766 Designed and implemented a mechanism to validate predefined ACPI methods
8768 objects. This code validates the predefined ACPI objects (objects whose
8770 start with underscore) that appear in the namespace, at the time they are
8771 evaluated. The argument count and the type of the returned object are
8772 validated against the ACPI specification. The purpose of this validation
8774 to detect problems with the BIOS-implemented predefined ACPI objects
8776 the results are returned to the ACPI-related drivers. Future enhancements
8778 include actual repair of incorrect return objects where possible. Two new
8779 files are nspredef.c and acpredef.h.
8781 Fixed a fault in the AML parser if a memory allocation fails during the
8783 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
8785 Fixed an issue with implicit return compatibility. This change improves
8787 implicit return mechanism to be more compatible with the MS interpreter.
8789 Ming, ACPICA BZ 349.
8791 Implemented support for zero-length buffer-to-string conversions. Allow
8793 length strings during interpreter buffer-to-string conversions. For
8795 during the ToDecimalString and ToHexString operators, as well as implicit
8796 conversions. Fiodor Suietov, ACPICA BZ 585.
8798 Fixed two possible memory leaks in the error exit paths of
8799 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
8801 similar in that they use a stack of state objects in order to eliminate
8802 recursion. The stack must be fully unwound and deallocated if an error
8803 occurs. Lin Ming. ACPICA BZ 383.
8805 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
8807 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
8808 Moore ACPICA BZ 442.
8810 Removed the obsolete version number in module headers. Removed the
8811 "$Revision" number that appeared in each module header. This version
8813 was useful under SourceSafe and CVS, but has no meaning under git. It is
8815 only incorrect, it could also be misleading.
8817 Example Code and Data Size: These are the sizes for the OS-independent
8818 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8819 debug version of the code includes the debug output trace mechanism and
8821 much larger code and data size.
8824 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8825 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8827 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8828 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8830 ----------------------------------------
8831 29 August 2008. Summary of changes for version 20080829:
8833 1) ACPI CA Core Subsystem:
8835 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
8836 Reference. Changes include the elimination of cheating on the Object
8838 for the DdbHandle subtype, addition of a reference class field to
8839 differentiate the various reference types (instead of an AML opcode), and
8841 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
8843 Reduce an error to a warning for an incorrect method argument count.
8844 Previously aborted with an error if too few arguments were passed to a
8845 control method via the external ACPICA interface. Now issue a warning
8847 and continue. Handles the case where the method inadvertently declares
8849 many arguments, but does not actually use the extra ones. Applies mainly
8851 the predefined methods. Lin Ming. Linux BZ 11032.
8853 Disallow the evaluation of named object types with no intrinsic value.
8855 AE_TYPE for objects that have no value and therefore evaluation is
8857 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
8859 these types were allowed, but an exception would be generated at some
8861 during the evaluation. Now, the error is generated up front.
8863 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
8864 (nsnames.c). Fixes a leak in the error exit path.
8866 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
8868 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
8870 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
8873 Removed obsolete and/or unused exception codes from the acexcep.h header.
8874 There is the possibility that certain device drivers may be affected if
8876 use any of these exceptions.
8878 The ACPICA documentation has been added to the public git source tree,
8880 acpica/documents. Included are the ACPICA programmer reference, the iASL
8881 compiler reference, and the changes.txt release logfile.
8883 Example Code and Data Size: These are the sizes for the OS-independent
8884 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8885 debug version of the code includes the debug output trace mechanism and
8887 much larger code and data size.
8890 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8891 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8893 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8894 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8896 2) iASL Compiler/Disassembler and Tools:
8898 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
8899 defines _SCP with 3 arguments. Previous versions defined it with only 1
8900 argument. iASL now allows both definitions.
8902 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
8904 length subtables when disassembling ACPI tables. Also fixed a couple of
8905 errors where a full 16-bit table type field was not extracted from the
8909 acpisrc: Improve comment counting mechanism for generating source code
8910 statistics. Count first and last lines of multi-line comments as
8912 not comment lines. Handle Linux legal header in addition to standard
8916 ----------------------------------------
8918 29 July 2008. Summary of changes for version 20080729:
8920 1) ACPI CA Core Subsystem:
8922 Fix a possible deadlock in the GPE dispatch. Remove call to
8923 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
8925 to acquire the GPE lock but can deadlock since the GPE lock is already
8927 at dispatch time. This code was introduced in version 20060831 as a
8929 to Linux BZ 6881 and has since been removed from Linux.
8931 Add a function to dereference returned reference objects. Examines the
8933 object from a call to AcpiEvaluateObject. Any Index or RefOf references
8935 automatically dereferenced in an attempt to return something useful
8937 reference types cannot be converted into an external ACPI_OBJECT.)
8939 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
8941 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
8942 subtables for the MADT and one new subtable for the SRAT. Includes
8943 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
8945 Specification, June 2008.
8947 Additional error checking for pathname utilities. Add error check after
8949 calls to AcpiNsGetPathnameLength. Add status return from
8950 AcpiNsBuildExternalPath and check after all calls. Add parameter
8952 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
8954 Return status from the global init function AcpiUtGlobalInitialize. This
8956 used by both the kernel subsystem and the utilities such as iASL
8958 The function could possibly fail when the caches are initialized. Yang
8961 Add a function to decode reference object types to strings. Created for
8962 improved error messages.
8964 Improve object conversion error messages. Better error messages during
8966 conversion from internal to the external ACPI_OBJECT. Used for external
8968 to AcpiEvaluateObject.
8970 Example Code and Data Size: These are the sizes for the OS-independent
8971 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8972 debug version of the code includes the debug output trace mechanism and
8974 much larger code and data size.
8977 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
8978 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8980 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8981 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8983 2) iASL Compiler/Disassembler and Tools:
8985 Debugger: fix a possible hang when evaluating non-methods. Fixes a
8987 introduced in version 20080701. If the object being evaluated (via
8989 command) is not a method, the debugger can hang while trying to obtain
8991 existent parameters.
8993 iASL: relax error for using reserved "_T_x" identifiers. These names can
8994 appear in a disassembled ASL file if they were emitted by the original
8995 compiler. Instead of issuing an error or warning and forcing the user to
8996 manually change these names, issue a remark instead.
8998 iASL: error if named object created in while loop. Emit an error if any
9000 object is created within a While loop. If allowed, this code will
9003 run-time error on the second iteration of the loop when an attempt is
9006 create the same named object twice. ACPICA bugzilla 730.
9008 iASL: Support absolute pathnames for include files. Add support for
9010 pathnames within the Include operator. previously, only relative
9014 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
9016 The ACPI spec requires one interrupt minimum. BZ 423
9018 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
9019 Handles the case for the Interrupt Resource Descriptor where
9020 the ResourceSource argument is omitted but ResourceSourceIndex
9021 is present. Now leave room for the Index. BZ 426
9023 iASL: Prevent error message if CondRefOf target does not exist. Fixes
9025 where an error message is emitted if the target does not exist. BZ 516
9027 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
9028 (get ACPI tables on Windows). This was apparently broken in version
9031 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
9033 the EOF happens immediately after the last table in the input file. Print
9034 completion message. Previously, no message was displayed in this case.
9036 ----------------------------------------
9037 01 July 2008. Summary of changes for version 20080701:
9039 0) Git source tree / acpica.org
9041 Fixed a problem where a git-clone from http would not transfer the entire
9044 1) ACPI CA Core Subsystem:
9046 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
9047 enable bit. Now performs a read-change-write of the enable register
9049 of simply writing out the cached enable mask. This will prevent
9051 enabling of GPEs if a rogue GPE is received during initialization (before
9053 handlers are installed.)
9055 Implemented a copy for dynamically loaded tables. Previously, dynamically
9056 loaded tables were simply mapped - but on some machines this memory is
9057 corrupted after suspend. Now copy the table to a local buffer. For the
9058 OpRegion case, added checksum verify. Use the table length from the table
9059 header, not the region length. For the Buffer case, use the table length
9060 also. Dennis Noordsij, Bob Moore. BZ 10734
9062 Fixed a problem where the same ACPI table could not be dynamically loaded
9064 unloaded more than once. Without this change, a table cannot be loaded
9066 once it has been loaded/unloaded one time. The current mechanism does not
9067 unregister a table upon an unload. During a load, if the same table is
9069 this no longer returns an exception. BZ 722
9071 Fixed a problem where the wrong descriptor length was calculated for the
9072 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
9074 are calculated as 12 bytes long, but the actual length in the internal
9075 descriptor is 16 because of the round-up to 8 on the 64-bit build.
9077 by Linn Crosetto. BZ 728
9079 Fixed a possible memory leak in the Unload operator. The DdbHandle
9081 by Load() did not have its reference count decremented during unload,
9083 to a memory leak. Lin Ming. BZ 727
9085 Fixed a possible memory leak when deleting thermal/processor objects. Any
9086 associated notify handlers (and objects) were not being deleted. Fiodor
9089 Fixed the ordering of the ASCII names in the global mutex table to match
9091 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
9093 Vegard Nossum. BZ 726
9095 Enhanced the AcpiGetObjectInfo interface to return the number of required
9096 arguments if the object is a control method. Added this call to the
9098 so the proper number of default arguments are passed to a method. This
9099 prevents a warning when executing methods from AcpiExec.
9101 Added a check for an invalid handle in AcpiGetObjectInfo. Return
9102 AE_BAD_PARAMETER if input handle is invalid. BZ 474
9104 Fixed an extraneous warning from exconfig.c on the 64-bit build.
9106 Example Code and Data Size: These are the sizes for the OS-independent
9107 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9108 debug version of the code includes the debug output trace mechanism and
9110 much larger code and data size.
9113 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9114 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9116 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9117 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9119 2) iASL Compiler/Disassembler and Tools:
9121 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
9122 resource descriptor names.
9124 iASL: Detect invalid ASCII characters in input (windows version). Removed
9126 "-CF" flag from the flex compile, enables correct detection of non-ASCII
9127 characters in the input. BZ 441
9129 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
9131 "result of operation not used" warning when the DDB handle returned from
9132 LoadTable is not used. The warning is not needed. BZ 590
9134 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
9137 pass address of table to the AML. Added option to disable OpRegion
9139 to allow creation of an OpRegion with a real address that was passed to
9141 All of this allows testing of the Load and Unload operators from
9144 Debugger: update tables command for unloaded tables. Handle unloaded
9146 and use the standard table header output routine.
9148 ----------------------------------------
9149 09 June 2008. Summary of changes for version 20080609:
9151 1) ACPI CA Core Subsystem:
9153 Implemented a workaround for reversed _PRT entries. A significant number
9155 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
9156 change dynamically detects and repairs this problem. Provides
9158 with MS ACPI. BZ 6859
9160 Simplified the internal ACPI hardware interfaces to eliminate the locking
9161 flag parameter from Register Read/Write. Added a new external interface,
9162 AcpiGetRegisterUnlocked.
9164 Fixed a problem where the invocation of a GPE control method could hang.
9166 was a regression introduced in 20080514. The new method argument count
9167 validation mechanism can enter an infinite loop when a GPE method is
9168 dispatched. Problem fixed by removing the obsolete code that passed GPE
9170 information to the notify handler via the control method parameter
9173 Fixed a problem where the _SST execution status was incorrectly returned
9175 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
9177 20080514. _SST is optional and a NOT_FOUND exception should never be
9180 Fixed a problem where a deleted object could be accessed from within the
9182 parser. This was a regression introduced in version 20080123 as a fix for
9184 Unload operator. Lin Ming. BZ 10669
9186 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
9188 and eliminated the use of a negative index in a loop. Operands are now
9189 displayed in the correct order, not backwards. This also fixes a
9191 introduced in 20080514 on 64-bit systems where the elimination of
9192 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
9195 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
9197 path did not delete a locally allocated structure.
9199 Updated definitions for the DMAR and SRAT tables to synchronize with the
9200 current specifications. Includes disassembler support.
9202 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
9203 loop termination value was used. Loop terminated on iteration early,
9205 one mutex. Linn Crosetto
9207 Example Code and Data Size: These are the sizes for the OS-independent
9208 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9209 debug version of the code includes the debug output trace mechanism and
9211 much larger code and data size.
9214 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9215 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9217 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9218 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9220 2) iASL Compiler/Disassembler and Tools:
9222 Disassembler: Implemented support for EisaId() within _CID objects. Now
9223 disassemble integer _CID objects back to EisaId invocations, including
9224 multiple integers within _CID packages. Includes single-step support for
9227 Disassembler: Added support for DMAR and SRAT table definition changes.
9229 ----------------------------------------
9230 14 May 2008. Summary of changes for version 20080514:
9232 1) ACPI CA Core Subsystem:
9234 Fixed a problem where GPEs were enabled too early during the ACPICA
9235 initialization. This could lead to "handler not installed" errors on some
9236 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
9238 ensures that all operation regions and devices throughout the namespace
9240 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
9242 Implemented a change to the enter sleep code. Moved execution of the _GTS
9243 method to just before setting sleep enable bit. The execution was moved
9245 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
9246 immediately before the SLP_EN bit is set, as per the ACPI specification.
9249 Implemented a fix to disable unknown GPEs (2nd version). Now always
9251 the GPE, even if ACPICA thinks that that it is already disabled. It is
9252 possible that the AML or some other code has enabled the GPE unbeknownst
9256 Fixed a problem with the Field operator where zero-length fields would
9258 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
9260 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
9262 Implemented a fix for the Load operator, now load the table at the
9264 root. This reverts a change introduced in version 20071019. The table is
9266 loaded at the namespace root even though this goes against the ACPI
9267 specification. This provides compatibility with other ACPI
9269 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
9272 Fixed a problem where ACPICA would not Load() tables with unusual
9274 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
9275 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
9276 Therefore, signature validation is worthless. Apparently MS ACPI accepts
9278 signatures, ACPICA must be compatible. BZ 10454.
9280 Fixed a possible negative array index in AcpiUtValidateException. Added
9282 fields to the exception string arrays to eliminate a -1 subtraction on
9286 Updated the debug tracking macros to reduce overall code and data size.
9287 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
9288 instead of pointers to static strings. Jan Beulich and Bob Moore.
9290 Implemented argument count checking in control method invocation via
9291 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
9293 many. This applies only to extern programmatic control method execution,
9295 method-to-method calls within the AML. Lin Ming.
9297 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
9299 longer needed, especially with the removal of 16-bit support. It was
9301 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
9304 32/64-bit platforms is required.
9306 Added the C const qualifier for appropriate string constants -- mostly
9307 MODULE_NAME and printf format strings. Jan Beulich.
9309 Example Code and Data Size: These are the sizes for the OS-independent
9310 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9311 debug version of the code includes the debug output trace mechanism and
9313 much larger code and data size.
9316 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9317 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9319 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9320 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9322 2) iASL Compiler/Disassembler and Tools:
9324 Implemented ACPI table revision ID validation in the disassembler. Zero
9326 always invalid. For DSDTs, the ID controls the interpreter integer width.
9328 means 32-bit and this is unusual. 2 or greater is 64-bit.
9330 ----------------------------------------
9331 21 March 2008. Summary of changes for version 20080321:
9333 1) ACPI CA Core Subsystem:
9335 Implemented an additional change to the GPE support in order to suppress
9336 spurious or stray GPEs. The AcpiEvDisableGpe function will now
9338 disable incoming GPEs that are neither enabled nor disabled -- meaning
9340 the GPE is unknown to the system. This should prevent future interrupt
9342 from that GPE. BZ 6217 (Zhang Rui)
9344 Fixed a problem where NULL package elements were not returned to the
9345 AcpiEvaluateObject interface correctly. The element was simply ignored
9346 instead of returning a NULL ACPI_OBJECT package element, potentially
9348 a buffer overflow and/or confusing the caller who expected a fixed number
9350 elements. BZ 10132 (Lin Ming, Bob Moore)
9352 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
9354 Qword), Field, BankField, and IndexField operators when invoked from
9356 an executing control method. In this case, these operators created
9358 nodes that were incorrectly left marked as permanent nodes instead of
9359 temporary nodes. This could cause a problem if there is race condition
9360 between an exiting control method and a running namespace walk. (Reported
9364 Fixed a problem where the CreateField and CreateXXXField operators would
9365 incorrectly allow duplicate names (the name of the field) with no
9369 Implemented several changes for Notify handling. Added support for new
9371 values (ACPI 2.0+) and improved the Notify debug output. Notify on
9372 PowerResource objects is no longer allowed, as per the ACPI
9374 (Bob Moore, Zhang Rui)
9376 All Reference Objects returned via the AcpiEvaluateObject interface are
9378 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
9380 NULL objects - either NULL package elements or unresolved named
9383 Fixed a problem where an extraneous debug message was produced for
9385 objects (when debugging enabled). The message "Package List length larger
9386 than NumElements count" is now produced in the correct case, and is now
9388 error message rather than a debug message. Added a debug message for the
9389 opposite case, where NumElements is larger than the Package List (the
9391 will be padded out with NULL elements as per the ACPI spec.)
9393 Implemented several improvements for the output of the ASL "Debug" object
9395 clarify and keep all data for a given object on one output line.
9397 Fixed two size calculation issues with the variable-length Start
9399 resource descriptor.
9401 Example Code and Data Size: These are the sizes for the OS-independent
9402 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9403 debug version of the code includes the debug output trace mechanism and
9405 a much larger code and data size.
9408 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9409 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9411 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9412 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9414 2) iASL Compiler/Disassembler and Tools:
9416 Fixed a problem with the use of the Switch operator where execution of
9418 containing method by multiple concurrent threads could cause an
9419 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
9420 actual Switch opcode, it must be simulated with local named temporary
9421 variables and if/else pairs. The solution chosen was to mark any method
9423 uses Switch as Serialized, thus preventing multiple thread entries. BZ
9426 ----------------------------------------
9427 13 February 2008. Summary of changes for version 20080213:
9429 1) ACPI CA Core Subsystem:
9431 Implemented another MS compatibility design change for GPE/Notify
9433 GPEs are now cleared/enabled asynchronously to allow all pending notifies
9435 complete first. It is expected that the OSL will queue the enable request
9436 behind all pending notify requests (may require changes to the local host
9438 in AcpiOsExecute). Alexey Starikovskiy.
9440 Fixed a problem where buffer and package objects passed as arguments to a
9441 control method via the external AcpiEvaluateObject interface could cause
9443 AE_AML_INTERNAL exception depending on the order and type of operators
9444 executed by the target control method.
9446 Fixed a problem where resource descriptor size optimization could cause a
9447 problem when a _CRS resource template is passed to a _SRS method. The
9449 resource template must use the same descriptors (with the same size) as
9450 returned from _CRS. This change affects the following resource
9452 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
9455 Fixed a problem where a CopyObject to RegionField, BankField, and
9457 objects did not perform an implicit conversion as it should. These types
9459 retain their initial type permanently as per the ACPI specification.
9461 a CopyObject to all other object types should not perform an implicit
9462 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
9464 Fixed a problem with the AcpiGetDevices interface where the mechanism to
9465 match device CIDs did not examine the entire list of available CIDs, but
9466 instead aborted on the first non-matching CID. Andrew Patterson.
9468 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
9470 inadvertently changed to return a 16-bit value instead of a 32-bit value,
9471 truncating the upper dword of a 64-bit value. This macro is only used to
9472 display debug output, so no incorrect calculations were made. Also,
9473 reimplemented the macro so that a 64-bit shift is not performed by
9474 inefficient compilers.
9476 Added missing va_end statements that should correspond with each va_start
9479 Example Code and Data Size: These are the sizes for the OS-independent
9480 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9481 debug version of the code includes the debug output trace mechanism and
9483 a much larger code and data size.
9486 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9487 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9489 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9490 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9492 2) iASL Compiler/Disassembler and Tools:
9494 Implemented full disassembler support for the following new ACPI tables:
9495 BERT, EINJ, and ERST. Implemented partial disassembler support for the
9496 complicated HEST table. These tables support the Windows Hardware Error
9497 Architecture (WHEA).
9499 ----------------------------------------
9500 23 January 2008. Summary of changes for version 20080123:
9502 1) ACPI CA Core Subsystem:
9504 Added the 2008 copyright to all module headers and signons. This affects
9505 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9506 the tools/utilities.
9508 Fixed a problem with the SizeOf operator when used with Package and
9510 objects. These objects have deferred execution for some arguments, and
9512 execution is now completed before the SizeOf is executed. This problem
9514 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
9518 Implemented an enhancement to the interpreter "slack mode". In the
9521 an explicit return or an implicitly returned object from the last
9523 opcode, a control method will now implicitly return an integer of value 0
9525 Microsoft compatibility. (Lin Ming) BZ 392
9527 Fixed a problem with the Load operator where an exception was not
9530 the case where the table is already loaded. (Lin Ming) BZ 463
9532 Implemented support for the use of DDBHandles as an Indexed Reference, as
9534 the ACPI spec. (Lin Ming) BZ 486
9536 Implemented support for UserTerm (Method invocation) for the Unload
9538 as per the ACPI spec. (Lin Ming) BZ 580
9540 Fixed a problem with the LoadTable operator where the OemId and
9542 input strings could cause unexpected failures if they were shorter than
9544 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
9546 Implemented support for UserTerm (Method invocation) for the Unload
9548 as per the ACPI spec. (Lin Ming) BZ 580
9550 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
9552 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
9554 Example Code and Data Size: These are the sizes for the OS-independent
9555 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9556 debug version of the code includes the debug output trace mechanism and
9558 a much larger code and data size.
9561 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9562 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9564 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9565 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9567 2) iASL Compiler/Disassembler and Tools:
9569 Implemented support in the disassembler for checksum validation on
9571 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
9573 header dump at the start of the disassembly.
9575 Implemented additional debugging information in the namespace listing
9577 created during compilation. In addition to the namespace hierarchy, the
9579 pathname to each namespace object is displayed.
9581 Fixed a problem with the disassembler where invalid ACPI tables could
9583 faults or infinite loops.
9585 Fixed an unexpected parse error when using the optional "parameter types"
9586 list in a control method declaration. (Lin Ming) BZ 397
9588 Fixed a problem where two External declarations with the same name did
9590 cause an error (Lin Ming) BZ 509
9592 Implemented support for full TermArgs (adding Argx, Localx and method
9593 invocation) for the ParameterData parameter to the LoadTable operator.
9597 ----------------------------------------
9598 19 December 2007. Summary of changes for version 20071219:
9600 1) ACPI CA Core Subsystem:
9602 Implemented full support for deferred execution for the TermArg string
9603 arguments for DataTableRegion. This enables forward references and full
9604 operand resolution for the three string arguments. Similar to
9606 deferred argument execution.) Lin Ming. BZ 430
9608 Implemented full argument resolution support for the BankValue argument
9610 BankField. Previously, only constants were supported, now any TermArg may
9612 used. Lin Ming BZ 387, 393
9614 Fixed a problem with AcpiGetDevices where the search of a branch of the
9615 device tree could be terminated prematurely. In accordance with the ACPI
9616 specification, the search down the current branch is terminated if a
9618 is both not present and not functional (instead of just not present.)
9622 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
9624 the underlying AML code changed the GPE enable registers. Now, any
9626 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
9628 instead of simply ignored. Rui Zhang.
9630 Fixed a problem with Index Fields where the Index register was
9632 limited to a maximum of 32 bits. Now any size may be used.
9634 Fixed a couple memory leaks associated with "implicit return" objects
9636 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
9638 Example Code and Data Size: These are the sizes for the OS-independent
9639 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9640 debug version of the code includes the debug output trace mechanism and
9642 a much larger code and data size.
9645 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9646 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9648 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9649 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9651 ----------------------------------------
9652 14 November 2007. Summary of changes for version 20071114:
9654 1) ACPI CA Core Subsystem:
9656 Implemented event counters for each of the Fixed Events, the ACPI SCI
9657 (interrupt) itself, and control methods executed. Named
9658 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
9660 should be useful for debugging and statistics.
9662 Implemented a new external interface, AcpiGetStatistics, to retrieve the
9663 contents of the various event counters. Returns the current values for
9664 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
9665 AcpiMethodCount. The interface can be expanded in the future if new
9667 are added. Device drivers should use this interface rather than access
9671 Fixed a problem with the FromBCD and ToBCD operators. With some
9673 the ShortDivide function worked incorrectly, causing problems with the
9675 functions with large input values. A truncation from 64-bit to 32-bit
9676 inadvertently occurred. Internal BZ 435. Lin Ming
9678 Fixed a problem with Index references passed as method arguments.
9680 passed as arguments to control methods were dereferenced immediately
9682 control was passed to the called method). The references are now
9684 passed directly to the called method. BZ 5389. Lin Ming
9686 Fixed a problem with CopyObject used in conjunction with the Index
9688 The reference was incorrectly dereferenced before the copy. The reference
9690 now correctly copied. BZ 5391. Lin Ming
9692 Fixed a problem with Control Method references within Package objects.
9694 references are now correctly generated. This completes the package
9695 construction overhaul that began in version 20071019.
9697 Example Code and Data Size: These are the sizes for the OS-independent
9698 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9699 debug version of the code includes the debug output trace mechanism and
9701 a much larger code and data size.
9704 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9705 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9707 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9708 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9711 2) iASL Compiler/Disassembler and Tools:
9713 The AcpiExec utility now installs handlers for all of the predefined
9714 Operation Region types. New types supported are: PCI_Config, CMOS, and
9717 Fixed a problem with the 64-bit version of AcpiExec where the extended
9719 bit) address fields for the DSDT and FACS within the FADT were not being
9720 used, causing truncation of the upper 32-bits of these addresses. Lin
9724 ----------------------------------------
9725 19 October 2007. Summary of changes for version 20071019:
9727 1) ACPI CA Core Subsystem:
9729 Fixed a problem with the Alias operator when the target of the alias is a
9730 named ASL operator that opens a new scope -- Scope, Device,
9732 Processor, and ThermalZone. In these cases, any children of the original
9733 operator could not be accessed via the alias, potentially causing
9735 AE_NOT_FOUND exceptions. (BZ 9067)
9737 Fixed a problem with the Package operator where all named references were
9738 created as object references and left otherwise unresolved. According to
9740 ACPI specification, a Package can only contain Data Objects or references
9742 control methods. The implication is that named references to Data Objects
9743 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
9744 immediately upon package creation. This is the approach taken with this
9745 change. References to all other named objects (Methods, Devices, Scopes,
9746 etc.) are all now properly created as reference objects. (BZ 5328)
9748 Reverted a change to Notify handling that was introduced in version
9749 20070508. This version changed the Notify handling from asynchronous to
9750 fully synchronous (Device driver Notify handling with respect to the
9752 ASL operator). It was found that this change caused more problems than it
9753 solved and was removed by most users.
9755 Fixed a problem with the Increment and Decrement operators where the type
9757 the target object could be unexpectedly and incorrectly changed. (BZ 353)
9760 Fixed a problem with the Load and LoadTable operators where the table
9761 location within the namespace was ignored. Instead, the table was always
9762 loaded into the root or current scope. Lin Ming.
9764 Fixed a problem with the Load operator when loading a table from a buffer
9765 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
9767 Fixed a problem with the Debug object where a store of a DdbHandle
9769 object to the Debug object could cause a fault.
9771 Added a table checksum verification for the Load operator, in the case
9773 the load is from a buffer. (BZ 578).
9775 Implemented additional parameter validation for the LoadTable operator.
9777 length of the input strings SignatureString, OemIdString, and OemTableId
9779 now checked for maximum lengths. (BZ 582) Lin Ming.
9781 Example Code and Data Size: These are the sizes for the OS-independent
9782 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9783 debug version of the code includes the debug output trace mechanism and
9785 a much larger code and data size.
9788 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9789 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9791 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9792 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9795 2) iASL Compiler/Disassembler:
9797 Fixed a problem where if a single file was specified and the file did not
9798 exist, no error message was emitted. (Introduced with wildcard support in
9801 ----------------------------------------
9802 19 September 2007. Summary of changes for version 20070919:
9804 1) ACPI CA Core Subsystem:
9806 Designed and implemented new external interfaces to install and remove
9807 handlers for ACPI table-related events. Current events that are defined
9809 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
9810 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
9811 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
9813 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
9814 (acpi_serialized option on Linux) could cause some systems to hang during
9815 initialization. (Bob Moore) BZ 8171
9817 Fixed a problem where objects of certain types (Device, ThermalZone,
9818 Processor, PowerResource) can be not found if they are declared and
9819 referenced from within the same control method (Lin Ming) BZ 341
9821 Example Code and Data Size: These are the sizes for the OS-independent
9822 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9823 debug version of the code includes the debug output trace mechanism and
9825 a much larger code and data size.
9828 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9829 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9831 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9832 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9835 2) iASL Compiler/Disassembler:
9837 Implemented support to allow multiple files to be compiled/disassembled
9840 single invocation. This includes command line wildcard support for both
9842 Windows and Unix versions of the compiler. This feature simplifies the
9843 disassembly and compilation of multiple ACPI tables in a single
9846 ----------------------------------------
9847 08 May 2007. Summary of changes for version 20070508:
9849 1) ACPI CA Core Subsystem:
9851 Implemented a Microsoft compatibility design change for the handling of
9853 Notify AML operator. Previously, notify handlers were dispatched and
9854 executed completely asynchronously in a deferred thread. The new design
9855 still executes the notify handlers in a different thread, but the
9857 thread that executed the Notify() now waits at a synchronization point
9859 the notify handler to complete. Some machines depend on a synchronous
9861 operator in order to operate correctly.
9863 Implemented support to allow Package objects to be passed as method
9864 arguments to the external AcpiEvaluateObject interface. Previously, this
9865 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
9866 implemented since there were no reserved control methods that required it
9869 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
9871 contained invalid non-zero values in reserved fields could cause later
9872 failures because these fields have meaning in later revisions of the
9874 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
9876 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
9878 Fixed a problem where the Global Lock handle was not properly updated if
9880 thread that acquired the Global Lock via executing AML code then
9882 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
9886 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
9887 could be corrupted if the interrupt being removed was at the head of the
9888 list. Reported by Linn Crosetto.
9890 Example Code and Data Size: These are the sizes for the OS-independent
9891 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9892 debug version of the code includes the debug output trace mechanism and
9894 a much larger code and data size.
9897 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9898 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9900 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9901 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9903 ----------------------------------------
9904 20 March 2007. Summary of changes for version 20070320:
9906 1) ACPI CA Core Subsystem:
9908 Implemented a change to the order of interpretation and evaluation of AML
9909 operand objects within the AML interpreter. The interpreter now evaluates
9910 operands in the order that they appear in the AML stream (and the
9911 corresponding ASL code), instead of in the reverse order (after the
9913 operand list has been parsed). The previous behavior caused several
9915 incompatibilities with the Microsoft AML interpreter as well as being
9916 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
9918 Implemented a change to the ACPI Global Lock support. All interfaces to
9920 global lock now allow the same thread to acquire the lock multiple times.
9921 This affects the AcpiAcquireGlobalLock external interface to the global
9923 as well as the internal use of the global lock to support AML fields -- a
9924 control method that is holding the global lock can now simultaneously
9926 AML fields that require global lock protection. Previously, in both
9928 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
9930 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
9931 Controller. There is no change to the behavior of the AML Acquire
9933 as this can already be used to acquire a mutex multiple times by the same
9934 thread. BZ 8066. With assistance from Alexey Starikovskiy.
9936 Fixed a problem where invalid objects could be referenced in the AML
9937 Interpreter after error conditions. During operand evaluation, ensure
9939 the internal "Return Object" field is cleared on error and only valid
9940 pointers are stored there. Caused occasional access to deleted objects
9942 resulted in "large reference count" warning messages. Valery Podrezov.
9944 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
9946 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
9949 Fixed an internal problem with the handling of result objects on the
9950 interpreter result stack. BZ 7872. Valery Podrezov.
9952 Removed obsolete code that handled the case where AML_NAME_OP is the
9954 of a reference (Reference.Opcode). This code was no longer necessary. BZ
9955 7874. Valery Podrezov.
9957 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
9960 remnant from the previously discontinued 16-bit support.
9962 Example Code and Data Size: These are the sizes for the OS-independent
9963 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9964 debug version of the code includes the debug output trace mechanism and
9966 a much larger code and data size.
9969 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9970 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9972 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9973 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9975 ----------------------------------------
9976 26 January 2007. Summary of changes for version 20070126:
9978 1) ACPI CA Core Subsystem:
9980 Added the 2007 copyright to all module headers and signons. This affects
9981 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9984 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
9985 during a table load. A bad pointer was passed in the case where the DSDT
9987 overridden, causing a fault in this case.
9989 Example Code and Data Size: These are the sizes for the OS-independent
9990 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9991 debug version of the code includes the debug output trace mechanism and
9993 a much larger code and data size.
9996 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9997 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9999 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10000 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10002 ----------------------------------------
10003 15 December 2006. Summary of changes for version 20061215:
10005 1) ACPI CA Core Subsystem:
10007 Support for 16-bit ACPICA has been completely removed since it is no
10009 necessary and it clutters the code. All 16-bit macros, types, and
10010 conditional compiles have been removed, cleaning up and simplifying the
10012 across the entire subsystem. DOS support is no longer needed since the
10013 bootable Linux firmware kit is now available.
10015 The handler for the Global Lock is now removed during AcpiTerminate to
10016 enable a clean subsystem restart, via the implementation of the
10017 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
10020 Implemented enhancements to the multithreading support within the
10022 to enable improved multithreading debugging and evaluation of the
10026 Debugger: Enhanced the Statistics/Memory command to emit the total
10028 memory used during the execution, as well as the maximum memory consumed
10030 each of the various object types. (Valery Podrezov)
10032 Example Code and Data Size: These are the sizes for the OS-independent
10033 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10034 debug version of the code includes the debug output trace mechanism and
10036 a much larger code and data size.
10039 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10040 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10042 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10043 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10046 2) iASL Compiler/Disassembler and Tools:
10048 AcpiExec: Implemented a new option (-m) to display full memory use
10049 statistics upon subsystem/program termination. (Valery Podrezov)
10051 ----------------------------------------
10052 09 November 2006. Summary of changes for version 20061109:
10054 1) ACPI CA Core Subsystem:
10056 Optimized the Load ASL operator in the case where the source operand is
10058 operation region. Simply map the operation region memory, instead of
10059 performing a bytewise read. (Region must be of type SystemMemory, see
10062 Fixed the Load ASL operator for the case where the source operand is a
10063 region field. A buffer object is also allowed as the source operand. BZ
10066 Fixed a problem where the Load ASL operator allowed the source operand to
10068 an operation region of any type. It is now restricted to regions of type
10069 SystemMemory, as per the ACPI specification. BZ 481
10071 Additional cleanup and optimizations for the new Table Manager code.
10073 AcpiEnable will now fail if all of the required ACPI tables are not
10075 (FADT, FACS, DSDT). BZ 477
10077 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
10079 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
10080 manually optimized to be aligned and will not work if it is byte-packed.
10082 Example Code and Data Size: These are the sizes for the OS-independent
10083 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10084 debug version of the code includes the debug output trace mechanism and
10086 a much larger code and data size.
10089 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10090 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10092 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10093 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10096 2) iASL Compiler/Disassembler and Tools:
10098 Fixed a problem where the presence of the _OSI predefined control method
10099 within complex expressions could cause an internal compiler error.
10101 AcpiExec: Implemented full region support for multiple address spaces.
10102 SpaceId is now part of the REGION object. BZ 429
10104 ----------------------------------------
10105 11 October 2006. Summary of changes for version 20061011:
10107 1) ACPI CA Core Subsystem:
10109 Completed an AML interpreter performance enhancement for control method
10110 execution. Previously a 2-pass parse/execution, control methods are now
10111 completely parsed and executed in a single pass. This improves overall
10112 interpreter performance by ~25%, reduces code size, and reduces CPU stack
10113 use. (Valery Podrezov + interpreter changes in version 20051202 that
10114 eliminated namespace loading during the pass one parse.)
10116 Implemented _CID support for PCI Root Bridge detection. If the _HID does
10118 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
10120 obtained and also checked for an ID match.
10122 Implemented additional support for the PCI _ADR execution: upsearch until
10124 device scope is found before executing _ADR. This allows PCI_Config
10125 operation regions to be declared locally within control methods
10127 PCI device objects.
10129 Fixed a problem with a possible race condition between threads executing
10130 AcpiWalkNamespace and the AML interpreter. This condition was removed by
10131 modifying AcpiWalkNamespace to (by default) ignore all temporary
10133 entries created during any concurrent control method execution. An
10134 additional namespace race condition is known to exist between
10135 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
10138 Restructured the AML ParseLoop function, breaking it into several
10139 subfunctions in order to reduce CPU stack use and improve
10143 AcpiGetHandle: Fix for parameter validation to detect invalid
10145 of prefix handle and pathname. BZ 478
10147 Example Code and Data Size: These are the sizes for the OS-independent
10148 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10149 debug version of the code includes the debug output trace mechanism and
10151 a much larger code and data size.
10154 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10155 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10157 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10158 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10160 2) iASL Compiler/Disassembler and Tools:
10162 Ported the -g option (get local ACPI tables) to the new ACPICA Table
10164 to restore original behavior.
10166 ----------------------------------------
10167 27 September 2006. Summary of changes for version 20060927:
10169 1) ACPI CA Core Subsystem:
10171 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
10172 These functions now use a spinlock for mutual exclusion and the interrupt
10173 level indication flag is not needed.
10175 Fixed a problem with the Global Lock where the lock could appear to be
10176 obtained before it is actually obtained. The global lock semaphore was
10177 inadvertently created with one unit instead of zero units. (BZ 464)
10181 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
10183 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
10185 Example Code and Data Size: These are the sizes for the OS-independent
10186 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10187 debug version of the code includes the debug output trace mechanism and
10189 a much larger code and data size.
10192 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10193 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10195 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10196 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10199 2) iASL Compiler/Disassembler and Tools:
10201 Fixed a compilation problem with the pre-defined Resource Descriptor
10203 names where an "object does not exist" error could be incorrectly
10205 if the parent ResourceTemplate pathname places the template within a
10206 different namespace scope than the current scope. (BZ 7212)
10208 Fixed a problem where the compiler could hang after syntax errors
10210 in an ElseIf construct. (BZ 453)
10212 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
10213 operator. An incorrect output filename was produced when this parameter
10215 a null string (""). Now, the original input filename is used as the AML
10216 output filename, with an ".aml" extension.
10218 Implemented a generic batch command mode for the AcpiExec utility
10220 any AML debugger command) (Valery Podrezov).
10222 ----------------------------------------
10223 12 September 2006. Summary of changes for version 20060912:
10225 1) ACPI CA Core Subsystem:
10227 Enhanced the implementation of the "serialized mode" of the interpreter
10228 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
10229 specified, instead of creating a serialization semaphore per control
10231 the interpreter lock is simply no longer released before a blocking
10232 operation during control method execution. This effectively makes the AML
10233 Interpreter single-threaded. The overhead of a semaphore per-method is
10236 Fixed a regression where an error was no longer emitted if a control
10238 attempts to create 2 objects of the same name. This once again returns
10239 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
10241 will dynamically serialize the control method to possible prevent future
10244 Integrated a fix for a problem with PCI Express HID detection in the PCI
10245 Config Space setup procedure. (BZ 7145)
10247 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
10248 AcpiHwInitialize function - the FADT registers are now validated when the
10251 Added two new warnings during FADT verification - 1) if the FADT is
10253 than the largest known FADT version, and 2) if there is a mismatch
10256 32-bit block address and the 64-bit X counterpart (when both are non-
10259 Example Code and Data Size: These are the sizes for the OS-independent
10260 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10261 debug version of the code includes the debug output trace mechanism and
10263 a much larger code and data size.
10266 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10267 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10269 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10270 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10273 2) iASL Compiler/Disassembler and Tools:
10275 Fixed a problem with the implementation of the Switch() operator where
10277 temporary variable was declared too close to the actual Switch, instead
10279 at method level. This could cause a problem if the Switch() operator is
10280 within a while loop, causing an error on the second iteration. (BZ 460)
10282 Disassembler - fix for error emitted for unknown type for target of scope
10283 operator. Now, ignore it and continue.
10285 Disassembly of an FADT now verifies the input FADT and reports any errors
10286 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
10288 Disassembly of raw data buffers with byte initialization data now
10290 each output line with the current buffer offset.
10292 Disassembly of ASF! table now includes all variable-length data fields at
10293 the end of some of the subtables.
10295 The disassembler now emits a comment if a buffer appears to be a
10296 ResourceTemplate, but cannot be disassembled as such because the EndTag
10298 not appear at the very end of the buffer.
10300 AcpiExec - Added the "-t" command line option to enable the serialized
10302 of the AML interpreter.
10304 ----------------------------------------
10305 31 August 2006. Summary of changes for version 20060831:
10307 1) ACPI CA Core Subsystem:
10309 Miscellaneous fixes for the Table Manager:
10310 - Correctly initialize internal common FADT for all 64-bit "X" fields
10311 - Fixed a couple table mapping issues during table load
10312 - Fixed a couple alignment issues for IA64
10313 - Initialize input array to zero in AcpiInitializeTables
10314 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
10315 AcpiGetTableByIndex
10317 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
10319 immediately disabled to prevent the waking GPE from firing again and to
10320 prevent other wake GPEs from interrupting the wake process.
10322 Added the AcpiGpeCount global that tracks the number of processed GPEs,
10324 be used for debugging systems with a large number of ACPI interrupts.
10326 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
10327 both the ACPICA headers and the disassembler.
10329 Example Code and Data Size: These are the sizes for the OS-independent
10330 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10331 debug version of the code includes the debug output trace mechanism and
10333 a much larger code and data size.
10336 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10337 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10339 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10340 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10343 2) iASL Compiler/Disassembler and Tools:
10345 Disassembler support for the DMAR ACPI table.
10347 ----------------------------------------
10348 23 August 2006. Summary of changes for version 20060823:
10350 1) ACPI CA Core Subsystem:
10352 The Table Manager component has been completely redesigned and
10353 reimplemented. The new design is much simpler, and reduces the overall
10355 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
10357 now possible to obtain the ACPI tables very early during kernel
10358 initialization, even before dynamic memory management is initialized.
10359 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
10361 Obsolete ACPICA interfaces:
10363 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
10366 - AcpiLoadTable: Not needed.
10367 - AcpiUnloadTable: Not needed.
10369 New ACPICA interfaces:
10371 - AcpiInitializeTables: Must be called before the table manager can be
10373 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
10374 allocated memory after it becomes available.
10375 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
10379 Other ACPICA changes:
10381 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
10383 AcpiOsUnmapMemory to free this mapping.
10384 - AcpiGetTable returns the actual mapped table. The mapping is managed
10385 internally and must not be deleted by the caller. Use of this interface
10386 causes no additional dynamic memory allocation.
10387 - AcpiFindRootPointer: Support for physical addressing has been
10389 it appeared to be unused.
10390 - The interface to AcpiOsMapMemory has changed to be consistent with the
10391 other allocation interfaces.
10392 - The interface to AcpiOsGetRootPointer has changed to eliminate
10395 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
10397 bit platforms. Was previously 64 bits on all platforms.
10398 - The interface to the ACPI Global Lock acquire/release macros have
10400 slightly since ACPICA no longer keeps a local copy of the FACS with a
10401 constructed pointer to the actual global lock.
10403 Porting to the new table manager:
10405 - AcpiInitializeTables: Must be called once, and can be called anytime
10406 during the OS initialization process. It allows the host to specify an
10408 of memory to be used to store the internal version of the RSDT/XSDT (root
10409 table). This allows the host to access ACPI tables before memory
10411 is initialized and running.
10412 - AcpiReallocateRootTable: Can be called after memory management is
10414 to copy the root table to a dynamically allocated array, freeing up the
10415 scratch memory specified in the call to AcpiInitializeTables.
10416 - AcpiSubsystemInitialize: This existing interface is independent of the
10417 Table Manager, and does not have to be called before the Table Manager
10419 be used, it only must be called before the rest of ACPICA can be used.
10420 - ACPI Tables: Some changes have been made to the names and structure of
10422 actbl.h and actbl1.h header files and may require changes to existing
10424 For example, bitfields have been completely removed because of their lack
10426 portability across C compilers.
10427 - Update interfaces to the Global Lock acquire/release macros if local
10428 versions are used. (see acwin.h)
10430 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
10432 New files: tbfind.c
10434 Example Code and Data Size: These are the sizes for the OS-independent
10435 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10436 debug version of the code includes the debug output trace mechanism and
10438 a much larger code and data size.
10441 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10442 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10444 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10445 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10448 2) iASL Compiler/Disassembler and Tools:
10450 No changes for this release.
10452 ----------------------------------------
10453 21 July 2006. Summary of changes for version 20060721:
10455 1) ACPI CA Core Subsystem:
10457 The full source code for the ASL test suite used to validate the iASL
10458 compiler and the ACPICA core subsystem is being released with the ACPICA
10459 source for the first time. The source is contained in a separate package
10461 consists of over 1100 files that exercise all ASL/AML operators. The
10463 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
10467 Completed a new design and implementation for support of the ACPI Global
10468 Lock. On the OS side, the global lock is now treated as a standard AML
10469 mutex. Previously, multiple OS threads could "acquire" the global lock
10470 simultaneously. However, this could cause the BIOS to be starved out of
10472 lock - especially in cases such as the Embedded Controller driver where
10473 there is a tight coupling between the OS and the BIOS.
10475 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
10476 The Global Lock interrupt handler no longer queues the execution of a
10477 separate thread to signal the global lock semaphore. Instead, the
10479 is signaled directly from the interrupt handler.
10481 Implemented support within the AML interpreter for package objects that
10482 contain a larger AML length (package list length) than the package
10484 count. In this case, the length of the package is truncated to match the
10485 package element count. Some BIOS code apparently modifies the package
10487 on the fly, and this change supports this behavior. Provides
10489 with the MS AML interpreter. (With assistance from Fiodor Suietov)
10491 Implemented a temporary fix for the BankValue parameter of a Bank Field
10493 support all constant values, now including the Zero and One opcodes.
10494 Evaluation of this parameter must eventually be converted to a full
10496 evaluation. A not-implemented error is now returned (temporarily) for
10498 constant values for this parameter.
10500 Fixed problem reports (Fiodor Suietov) integrated:
10501 - Fix for premature object deletion after CopyObject on Operation Region
10505 Example Code and Data Size: These are the sizes for the OS-independent
10506 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10507 debug version of the code includes the debug output trace mechanism and
10509 a much larger code and data size.
10512 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
10513 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
10515 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10516 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10519 2) iASL Compiler/Disassembler and Tools:
10521 No changes for this release.
10523 ----------------------------------------
10524 07 July 2006. Summary of changes for version 20060707:
10526 1) ACPI CA Core Subsystem:
10528 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
10529 that do not allow the initialization of address pointers within packed
10530 structures - even though the hardware itself may support misaligned
10531 transfers. Some of the debug data structures are packed by default to
10534 Added an error message for the case where AcpiOsGetThreadId() returns
10536 A non-zero value is required by the core ACPICA code to ensure the proper
10537 operation of AML mutexes and recursive control methods.
10539 The DSDT is now the only ACPI table that determines whether the AML
10540 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
10542 the hooks for per-table 32/64 switching have been removed from the code.
10544 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
10546 Fixed a possible leak of an OwnerID in the error path of
10547 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
10548 deletion to a single place in AcpiTbUninstallTable to correct possible
10550 when using the AcpiTbDeleteTablesByType interface (with assistance from
10553 Fixed a problem with Serialized control methods where the semaphore
10554 associated with the method could be over-signaled after multiple method
10557 Fixed two issues with the locking of the internal namespace data
10559 Both the Unload() operator and AcpiUnloadTable interface now lock the
10560 namespace during the namespace deletion associated with the table unload
10561 (with assistance from Linn Crosetto.)
10563 Fixed problem reports (Valery Podrezov) integrated:
10564 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
10566 Fixed problem reports (Fiodor Suietov) integrated:
10567 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
10568 - On Address Space handler deletion, needless deactivation call (BZ 374)
10569 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
10571 - Possible memory leak, Notify sub-objects of Processor, Power,
10574 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
10575 - Minimum Length of RSDT should be validated (BZ 379)
10576 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
10578 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
10582 Example Code and Data Size: These are the sizes for the OS-independent
10583 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10584 debug version of the code includes the debug output trace mechanism and
10586 a much larger code and data size.
10589 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10590 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10592 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10593 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10596 2) iASL Compiler/Disassembler and Tools:
10598 Fixed problem reports:
10599 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
10602 ----------------------------------------
10603 23 June 2006. Summary of changes for version 20060623:
10605 1) ACPI CA Core Subsystem:
10607 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
10608 allows the type to be customized to the host OS for improved efficiency
10609 (since a spinlock is usually a very small object.)
10611 Implemented support for "ignored" bits in the ACPI registers. According
10613 the ACPI specification, these bits should be preserved when writing the
10614 registers via a read/modify/write cycle. There are 3 bits preserved in
10616 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
10618 Implemented the initial deployment of new OSL mutex interfaces. Since
10620 host operating systems have separate mutex and semaphore objects, this
10621 feature was requested. The base code now uses mutexes (and the new mutex
10622 interfaces) wherever a binary semaphore was used previously. However, for
10623 the current release, the mutex interfaces are defined as macros to map
10625 to the existing semaphore interfaces. Therefore, no OSL changes are
10627 at this time. (See acpiosxf.h)
10629 Fixed several problems with the support for the control method SyncLevel
10630 parameter. The SyncLevel now works according to the ACPI specification
10632 in concert with the Mutex SyncLevel parameter, since the current
10634 is a property of the executing thread. Mutual exclusion for control
10636 is now implemented with a mutex instead of a semaphore.
10638 Fixed three instances of the use of the C shift operator in the bitfield
10639 support code (exfldio.c) to avoid the use of a shift value larger than
10641 target data width. The behavior of C compilers is undefined in this case
10643 can cause unpredictable results, and therefore the case must be detected
10645 avoided. (Fiodor Suietov)
10647 Added an info message whenever an SSDT or OEM table is loaded dynamically
10648 via the Load() or LoadTable() ASL operators. This should improve
10650 capability since it will show exactly what tables have been loaded
10652 the tables present in the RSDT/XSDT.)
10654 Example Code and Data Size: These are the sizes for the OS-independent
10655 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10656 debug version of the code includes the debug output trace mechanism and
10658 a much larger code and data size.
10661 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10662 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10664 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10665 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10668 2) iASL Compiler/Disassembler and Tools:
10670 No changes for this release.
10672 ----------------------------------------
10673 08 June 2006. Summary of changes for version 20060608:
10675 1) ACPI CA Core Subsystem:
10677 Converted the locking mutex used for the ACPI hardware to a spinlock.
10679 change should eliminate all problems caused by attempting to acquire a
10680 semaphore at interrupt level, and it means that all ACPICA external
10681 interfaces that directly access the ACPI hardware can be safely called
10683 interrupt level. OSL code that implements the semaphore interfaces should
10685 able to eliminate any workarounds for being called at interrupt level.
10687 Fixed a regression introduced in 20060526 where the ACPI device
10688 initialization could be prematurely aborted with an AE_NOT_FOUND if a
10690 did not have an optional _INI method.
10692 Fixed an IndexField issue where a write to the Data Register should be
10693 limited in size to the AccessSize (width) of the IndexField itself. (BZ
10697 Fixed problem reports (Valery Podrezov) integrated:
10698 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
10700 Fixed problem reports (Fiodor Suietov) integrated:
10701 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
10703 Removed four global mutexes that were obsolete and were no longer being
10706 Example Code and Data Size: These are the sizes for the OS-independent
10707 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10708 debug version of the code includes the debug output trace mechanism and
10710 a much larger code and data size.
10713 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10714 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10716 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10717 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10720 2) iASL Compiler/Disassembler and Tools:
10722 Fixed a fault when using -g option (get tables from registry) on Windows
10725 Fixed problem reports integrated:
10726 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
10727 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
10729 - Global table revision override (-r) is ignored (BZ 413)
10731 ----------------------------------------
10732 26 May 2006. Summary of changes for version 20060526:
10734 1) ACPI CA Core Subsystem:
10736 Restructured, flattened, and simplified the internal interfaces for
10737 namespace object evaluation - resulting in smaller code, less CPU stack
10739 and fewer interfaces. (With assistance from Mikhail Kouzmich)
10741 Fixed a problem with the CopyObject operator where the first parameter
10743 not typed correctly for the parser, interpreter, compiler, and
10745 Caused various errors and unexpected behavior.
10747 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
10748 produced incorrect results with some C compilers. Since the behavior of C
10749 compilers when the shift value is larger than the datatype width is
10750 apparently not well defined, the interpreter now detects this condition
10752 simply returns zero as expected in all such cases. (BZ 395)
10754 Fixed problem reports (Valery Podrezov) integrated:
10755 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
10756 - Allow interpreter to handle nested method declarations (BZ 5361)
10758 Fixed problem reports (Fiodor Suietov) integrated:
10759 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
10761 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
10763 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
10764 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
10765 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
10766 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
10767 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
10768 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
10769 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
10771 - Status of the Global Initialization Handler call not used (BZ 366)
10772 - Incorrect object parameter to Global Initialization Handler (BZ 367)
10774 Example Code and Data Size: These are the sizes for the OS-independent
10775 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10776 debug version of the code includes the debug output trace mechanism and
10778 a much larger code and data size.
10781 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10782 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10784 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10785 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10788 2) iASL Compiler/Disassembler and Tools:
10790 Modified the parser to allow the names IO, DMA, and IRQ to be used as
10791 namespace identifiers with no collision with existing resource descriptor
10792 macro names. This provides compatibility with other ASL compilers and is
10793 most useful for disassembly/recompilation of existing tables without
10795 errors. (With assistance from Thomas Renninger)
10797 Disassembler: fixed an incorrect disassembly problem with the
10798 DataTableRegion and CopyObject operators. Fixed a possible fault during
10799 disassembly of some Alias operators.
10801 ----------------------------------------
10802 12 May 2006. Summary of changes for version 20060512:
10804 1) ACPI CA Core Subsystem:
10806 Replaced the AcpiOsQueueForExecution interface with a new interface named
10807 AcpiOsExecute. The major difference is that the new interface does not
10809 a Priority parameter, this appeared to be useless and has been replaced
10812 Type parameter. The Type tells the host what type of execution is being
10813 requested, such as global lock handler, notify handler, GPE handler, etc.
10814 This allows the host to queue and execute the request as appropriate for
10816 request type, possibly using different work queues and different
10818 for the various request types. This enables fixes for multithreading
10819 deadlock problems such as BZ #5534, and will require changes to all
10821 OS interface layers. (Alexey Starikovskiy and Bob Moore)
10823 Fixed a possible memory leak associated with the support for the so-
10825 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
10828 Fixed a problem with the Load() operator where a table load from an
10829 operation region could overwrite an internal table buffer by up to 7
10831 and cause alignment faults on IPF systems. (With assistance from Luming
10834 Example Code and Data Size: These are the sizes for the OS-independent
10835 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10836 debug version of the code includes the debug output trace mechanism and
10838 a much larger code and data size.
10841 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10842 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10844 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10845 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10849 2) iASL Compiler/Disassembler and Tools:
10851 Disassembler: Implemented support to cross reference the internal
10853 and automatically generate ASL External() statements for symbols not
10855 within the current table being disassembled. This will simplify the
10856 disassembly and recompilation of interdependent tables such as SSDTs
10858 these statements will no longer have to be added manually.
10860 Disassembler: Implemented experimental support to automatically detect
10861 invocations of external control methods and generate appropriate
10863 statements. This is problematic because the AML cannot be correctly
10865 until the number of arguments for each control method is known.
10867 standalone method invocations and invocations as the source operand of a
10868 Store() statement are supported.
10870 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
10871 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
10872 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
10873 more readable and likely closer to the original ASL source.
10875 ----------------------------------------
10876 21 April 2006. Summary of changes for version 20060421:
10878 1) ACPI CA Core Subsystem:
10880 Removed a device initialization optimization introduced in 20051216 where
10881 the _STA method was not run unless an _INI was also present for the same
10882 device. This optimization could cause problems because it could allow
10884 methods to be run within a not-present device subtree. (If a not-present
10885 device had no _INI, _STA would not be run, the not-present status would
10887 be discovered, and the children of the device would be incorrectly
10890 Implemented a new _STA optimization where namespace subtrees that do not
10891 contain _INI are identified and ignored during device initialization.
10892 Selectively running _STA can significantly improve boot time on large
10893 machines (with assistance from Len Brown.)
10895 Implemented support for the device initialization case where the returned
10896 _STA flags indicate a device not-present but functioning. In this case,
10898 is not run, but the device children are examined for presence, as per the
10899 ACPI specification.
10901 Implemented an additional change to the IndexField support in order to
10902 conform to MS behavior. The value written to the Index Register is not
10903 simply a byte offset, it is a byte offset in units of the access width of
10904 the parent Index Field. (Fiodor Suietov)
10906 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
10907 interface is called during the creation of all AML operation regions, and
10908 allows the host OS to exert control over what addresses it will allow the
10909 AML code to access. Operation Regions whose addresses are disallowed will
10910 cause a runtime exception when they are actually accessed (will not
10912 or abort table loading.) See oswinxf or osunixxf for an example
10915 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
10916 interface allows the host OS to match the various "optional"
10917 interface/behavior strings for the _OSI predefined control method as
10918 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
10919 for an example implementation.
10921 Restructured and corrected various problems in the exception handling
10923 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
10924 (with assistance from Takayoshi Kochi.)
10926 Modified the Linux source converter to ignore quoted string literals
10928 converting identifiers from mixed to lower case. This will correct
10930 with the disassembler and other areas where such strings must not be
10933 The ACPI_FUNCTION_* macros no longer require quotes around the function
10934 name. This allows the Linux source converter to convert the names, now
10936 the converter ignores quoted strings.
10938 Example Code and Data Size: These are the sizes for the OS-independent
10939 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10940 debug version of the code includes the debug output trace mechanism and
10942 a much larger code and data size.
10946 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10947 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10949 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10950 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10953 2) iASL Compiler/Disassembler and Tools:
10955 Implemented 3 new warnings for iASL, and implemented multiple warning
10959 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
10961 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
10962 check for the possible timeout, a warning is issued.
10964 2) Useless operators: If an ASL operator does not specify an optional
10966 operand and it also does not use the function return value from the
10967 operator, a warning is issued since the operator effectively does
10970 3) Unreferenced objects: If a namespace object is created, but never
10971 referenced, a warning is issued. This is a warning level 2 since there
10973 cases where this is ok, such as when a secondary table is loaded that
10975 the unreferenced objects. Even so, care is taken to only flag objects
10977 don't look like they will ever be used. For example, the reserved methods
10978 (starting with an underscore) are usually not referenced because it is
10979 expected that the OS will invoke them.
10981 ----------------------------------------
10982 31 March 2006. Summary of changes for version 20060331:
10984 1) ACPI CA Core Subsystem:
10986 Implemented header file support for the following additional ACPI tables:
10987 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
10989 all current and known ACPI tables are now defined in the ACPICA headers
10991 are available for use by device drivers and other software.
10993 Implemented support to allow tables that contain ACPI names with invalid
10994 characters to be loaded. Previously, this would cause the table load to
10995 fail, but since there are several known cases of such tables on existing
10996 machines, this change was made to enable ACPI support for them. Also,
10998 matches the behavior of the Microsoft ACPI implementation.
11000 Fixed a couple regressions introduced during the memory optimization in
11002 20060317 release. The namespace node definition required additional
11003 reorganization and an internal datatype that had been changed to 8-bit
11005 restored to 32-bit. (Valery Podrezov)
11007 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
11008 could be passed through to AcpiOsReleaseObject which is unexpected. Such
11009 null pointers are now trapped and ignored, matching the behavior of the
11010 previous implementation before the deployment of AcpiOsReleaseObject.
11011 (Valery Podrezov, Fiodor Suietov)
11013 Fixed a memory mapping leak during the deletion of a SystemMemory
11015 region where a cached memory mapping was not deleted. This became a
11016 noticeable problem for operation regions that are defined within
11018 used control methods. (Dana Meyers)
11020 Reorganized the ACPI table header files into two main files: one for the
11021 ACPI tables consumed by the ACPICA core, and another for the
11023 ACPI tables that are consumed by the drivers and other software. The
11025 FADT definitions were merged into one common section and three different
11026 tables (ACPI 1.0, 1.0+, and 2.0)
11028 Example Code and Data Size: These are the sizes for the OS-independent
11029 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11030 debug version of the code includes the debug output trace mechanism and
11032 a much larger code and data size.
11035 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11036 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11038 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11039 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11042 2) iASL Compiler/Disassembler and Tools:
11044 Disassembler: Implemented support to decode and format all non-AML ACPI
11045 tables (tables other than DSDTs and SSDTs.) This includes the new tables
11046 added to the ACPICA headers, therefore all current and known ACPI tables
11050 Disassembler: The change to allow ACPI names with invalid characters also
11051 enables the disassembly of such tables. Invalid characters within names
11053 changed to '*' to make the name printable; the iASL compiler will still
11054 generate an error for such names, however, since this is an invalid ACPI
11057 Implemented an option for AcpiXtract (-a) to extract all tables found in
11059 input file. The default invocation extracts only the DSDTs and SSDTs.
11061 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
11062 makefile for the AcpiXtract utility.
11064 ----------------------------------------
11065 17 March 2006. Summary of changes for version 20060317:
11067 1) ACPI CA Core Subsystem:
11069 Implemented the use of a cache object for all internal namespace nodes.
11070 Since there are about 1000 static nodes in a typical system, this will
11071 decrease memory use for cache implementations that minimize per-
11073 overhead (such as a slab allocator.)
11075 Removed the reference count mechanism for internal namespace nodes, since
11077 was deemed unnecessary. This reduces the size of each namespace node by
11078 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
11080 and 32 bytes for the 64-bit case.
11082 Optimized several internal data structures to reduce object size on 64-
11084 platforms by packing data within the 64-bit alignment. This includes the
11085 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
11086 instances corresponding to the namespace objects.
11088 Added two new strings for the predefined _OSI method: "Windows 2001.1
11090 and "Windows 2006".
11092 Split the allocation tracking mechanism out to a separate file, from
11093 utalloc.c to uttrack.c. This mechanism appears to be only useful for
11094 application-level code. Kernels may wish to not include uttrack.c in
11097 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
11099 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
11102 Code and Data Size: These are the sizes for the acpica.lib produced by
11104 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11106 driver or OSPM code. The debug version of the code includes the debug
11108 trace mechanism and has a much larger code and data size. Note that these
11109 values will vary depending on the efficiency of the compiler and the
11110 compiler options used during generation.
11113 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11114 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11116 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11117 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11120 2) iASL Compiler/Disassembler and Tools:
11122 Implemented an ANSI C version of the acpixtract utility. This version
11124 automatically extract the DSDT and all SSDTs from the input acpidump text
11125 file and dump the binary output to separate files. It can also display a
11126 summary of the input file including the headers for each table found and
11127 will extract any single ACPI table, with any signature. (See
11128 source/tools/acpixtract)
11130 ----------------------------------------
11131 10 March 2006. Summary of changes for version 20060310:
11133 1) ACPI CA Core Subsystem:
11135 Tagged all external interfaces to the subsystem with the new
11136 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
11138 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
11139 macro. The default definition is NULL.
11141 Added the ACPI_THREAD_ID type for the return value from
11143 This allows the host to define this as necessary to simplify kernel
11144 integration. The default definition is ACPI_NATIVE_UINT.
11146 Fixed two interpreter problems related to error processing, the deletion
11148 objects, and placing invalid pointers onto the internal operator result
11149 stack. BZ 6028, 6151 (Valery Podrezov)
11151 Increased the reference count threshold where a warning is emitted for
11153 reference counts in order to eliminate unnecessary warnings on systems
11155 large namespaces (especially 64-bit.) Increased the value from 0x400 to
11158 Due to universal disagreement as to the meaning of the 'c' in the
11160 function, the ACPI_MEM_CALLOCATE macro has been renamed to
11161 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
11162 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
11165 Code and Data Size: These are the sizes for the acpica.lib produced by
11167 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11169 driver or OSPM code. The debug version of the code includes the debug
11171 trace mechanism and has a much larger code and data size. Note that these
11172 values will vary depending on the efficiency of the compiler and the
11173 compiler options used during generation.
11176 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11177 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11179 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11180 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11183 2) iASL Compiler/Disassembler:
11185 Disassembler: implemented support for symbolic resource descriptor
11186 references. If a CreateXxxxField operator references a fixed offset
11189 resource descriptor, a name is assigned to the descriptor and the offset
11191 translated to the appropriate resource tag and pathname. The addition of
11192 this support brings the disassembled code very close to the original ASL
11193 source code and helps eliminate run-time errors when the disassembled
11195 is modified (and recompiled) in such a way as to invalidate the original
11198 Implemented support for a Descriptor Name as the last parameter to the
11200 Register() macro. This parameter was inadvertently left out of the ACPI
11201 specification, and will be added for ACPI 3.0b.
11203 Fixed a problem where the use of the "_OSI" string (versus the full path
11204 "\_OSI") caused an internal compiler error. ("No back ptr to op")
11206 Fixed a problem with the error message that occurs when an invalid string
11208 used for a _HID object (such as one with an embedded asterisk:
11210 The correct message is now displayed.
11212 ----------------------------------------
11213 17 February 2006. Summary of changes for version 20060217:
11215 1) ACPI CA Core Subsystem:
11217 Implemented a change to the IndexField support to match the behavior of
11219 Microsoft AML interpreter. The value written to the Index register is now
11221 byte offset, no longer an index based upon the width of the Data
11223 This should fix IndexField problems seen on some machines where the Data
11224 register is not exactly one byte wide. The ACPI specification will be
11225 clarified on this point.
11227 Fixed a problem where several resource descriptor types could overrun the
11228 internal descriptor buffer due to size miscalculation: VendorShort,
11229 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
11230 affect all platforms.
11232 Fixed a problem where individual resource descriptors were misaligned
11234 the internal buffer, causing alignment faults on IA64 platforms.
11236 Code and Data Size: These are the sizes for the acpica.lib produced by
11238 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11240 driver or OSPM code. The debug version of the code includes the debug
11242 trace mechanism and has a much larger code and data size. Note that these
11243 values will vary depending on the efficiency of the compiler and the
11244 compiler options used during generation.
11247 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11248 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11250 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11251 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11254 2) iASL Compiler/Disassembler:
11256 Implemented support for new reserved names: _WDG and _WED are Microsoft
11257 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
11258 defined method (Throttling Depth Limit.)
11260 Fixed a problem where a zero-length VendorShort or VendorLong resource
11261 descriptor was incorrectly emitted as a descriptor of length one.
11263 ----------------------------------------
11264 10 February 2006. Summary of changes for version 20060210:
11266 1) ACPI CA Core Subsystem:
11268 Removed a couple of extraneous ACPI_ERROR messages that appeared during
11269 normal execution. These became apparent after the conversion from
11272 Fixed a problem where the CreateField operator could hang if the BitIndex
11274 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
11276 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
11277 failed with an exception. This also fixes a couple of related RefOf and
11278 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
11280 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
11282 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
11286 Implemented a memory cleanup at the end of the execution of each
11288 of an AML While() loop, preventing the accumulation of outstanding
11290 (Valery Podrezov, BZ 5427)
11292 Eliminated a chunk of duplicate code in the object resolution code.
11296 Fixed several warnings during the 64-bit code generation.
11298 The AcpiSrc source code conversion tool now inserts one line of
11300 after an if() statement that is followed immediately by a comment,
11302 readability of the Linux code.
11304 Code and Data Size: The current and previous library sizes for the core
11305 subsystem are shown below. These are the code and data sizes for the
11306 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11308 values do not include any ACPI driver or OSPM code. The debug version of
11310 code includes the debug output trace mechanism and has a much larger code
11311 and data size. Note that these values will vary depending on the
11313 of the compiler and the compiler options used during generation.
11316 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11317 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11319 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11320 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11323 2) iASL Compiler/Disassembler:
11325 Fixed a problem with the disassembly of a BankField operator with a
11327 expression for the BankValue parameter.
11329 ----------------------------------------
11330 27 January 2006. Summary of changes for version 20060127:
11332 1) ACPI CA Core Subsystem:
11334 Implemented support in the Resource Manager to allow unresolved
11336 references within resource package objects for the _PRT method. This
11338 is in addition to the previously implemented unresolved reference support
11339 within the AML parser. If the interpreter slack mode is enabled, these
11340 unresolved references will be passed through to the caller as a NULL
11344 Implemented and deployed new macros and functions for error and warning
11345 messages across the subsystem. These macros are simpler and generate less
11346 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
11347 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
11348 macros remain defined to allow ACPI drivers time to migrate to the new
11351 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
11353 Acquire/Release Lock OSL interfaces.
11355 Fixed a problem where Alias ASL operators are sometimes not correctly
11356 resolved, in both the interpreter and the iASL compiler.
11358 Fixed several problems with the implementation of the
11359 ConcatenateResTemplate
11360 ASL operator. As per the ACPI specification, zero length buffers are now
11361 treated as a single EndTag. One-length buffers always cause a fatal
11362 exception. Non-zero length buffers that do not end with a full 2-byte
11364 cause a fatal exception.
11366 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
11367 interface. (With assistance from Thomas Renninger)
11369 Code and Data Size: The current and previous library sizes for the core
11370 subsystem are shown below. These are the code and data sizes for the
11371 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11373 values do not include any ACPI driver or OSPM code. The debug version of
11375 code includes the debug output trace mechanism and has a much larger code
11376 and data size. Note that these values will vary depending on the
11378 of the compiler and the compiler options used during generation.
11381 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11382 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11384 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11385 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11388 2) iASL Compiler/Disassembler:
11390 Fixed an internal error that was generated for any forward references to
11394 ----------------------------------------
11395 13 January 2006. Summary of changes for version 20060113:
11397 1) ACPI CA Core Subsystem:
11399 Added 2006 copyright to all module headers and signons. This affects
11400 virtually every file in the ACPICA core subsystem, iASL compiler, and the
11403 Enhanced the ACPICA error reporting in order to simplify user migration
11405 the non-debug version of ACPICA. Replaced all instances of the
11406 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
11408 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
11409 respectively. This preserves all error and warning messages in the non-
11411 version of the ACPICA code (this has been referred to as the "debug lite"
11412 option.) Over 200 cases were converted to create a total of over 380
11413 error/warning messages across the ACPICA code. This increases the code
11415 data size of the default non-debug version of the code somewhat (about
11417 but all error/warning reporting may be disabled if desired (and code
11418 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
11419 configuration option. The size of the debug version of ACPICA remains
11423 Fixed a memory leak within the AML Debugger "Set" command. One object was
11424 not properly deleted for every successful invocation of the command.
11426 Code and Data Size: The current and previous library sizes for the core
11427 subsystem are shown below. These are the code and data sizes for the
11428 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11430 values do not include any ACPI driver or OSPM code. The debug version of
11432 code includes the debug output trace mechanism and has a much larger code
11433 and data size. Note that these values will vary depending on the
11435 of the compiler and the compiler options used during generation.
11438 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11439 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11441 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11442 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11445 2) iASL Compiler/Disassembler:
11447 The compiler now officially supports the ACPI 3.0a specification that was
11448 released on December 30, 2005. (Specification is available at
11451 ----------------------------------------
11452 16 December 2005. Summary of changes for version 20051216:
11454 1) ACPI CA Core Subsystem:
11456 Implemented optional support to allow unresolved names within ASL Package
11457 objects. A null object is inserted in the package when a named reference
11458 cannot be located in the current namespace. Enabled via the interpreter
11459 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
11461 that contain such code.
11463 Implemented an optimization to the initialization sequence that can
11465 boot time. During ACPI device initialization, the _STA method is now run
11467 and only if the _INI method exists. The _STA method is used to determine
11469 the device is present; An _INI can only be run if _STA returns present,
11471 it is a waste of time to run the _STA method if the _INI does not exist.
11472 (Prototype and assistance from Dong Wei)
11474 Implemented use of the C99 uintptr_t for the pointer casting macros if it
11476 available in the current compiler. Otherwise, the default (void *) cast
11480 Fixed some possible memory leaks found within the execution path of the
11481 Break, Continue, If, and CreateField operators. (Valery Podrezov)
11483 Fixed a problem introduced in the 20051202 release where an exception is
11484 generated during method execution if a control method attempts to declare
11487 Moved resource descriptor string constants that are used by both the AML
11488 disassembler and AML debugger to the common utilities directory so that
11489 these components are independent.
11491 Implemented support in the AcpiExec utility (-e switch) to globally
11493 exceptions during control method execution (method is not aborted.)
11495 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
11498 Code and Data Size: The current and previous library sizes for the core
11499 subsystem are shown below. These are the code and data sizes for the
11500 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11502 values do not include any ACPI driver or OSPM code. The debug version of
11504 code includes the debug output trace mechanism and has a much larger code
11505 and data size. Note that these values will vary depending on the
11507 of the compiler and the compiler options used during generation.
11510 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11511 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11513 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11514 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11517 2) iASL Compiler/Disassembler:
11519 Fixed a problem where a CPU stack overflow fault could occur if a
11521 method call was made from within a Return statement.
11523 ----------------------------------------
11524 02 December 2005. Summary of changes for version 20051202:
11526 1) ACPI CA Core Subsystem:
11528 Modified the parsing of control methods to no longer create namespace
11529 objects during the first pass of the parse. Objects are now created only
11530 during the execute phase, at the moment the namespace creation operator
11532 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
11534 should eliminate ALREADY_EXISTS exceptions seen on some machines where
11535 reentrant control methods are protected by an AML mutex. The mutex will
11537 correctly block multiple threads from attempting to create the same
11541 Increased the number of available Owner Ids for namespace object tracking
11542 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
11544 some machines with a large number of ACPI tables (either static or
11547 Fixed a problem with the AcpiExec utility where a fault could occur when
11549 -b switch (batch mode) is used.
11551 Enhanced the namespace dump routine to output the owner ID for each
11554 Code and Data Size: The current and previous library sizes for the core
11555 subsystem are shown below. These are the code and data sizes for the
11556 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11558 values do not include any ACPI driver or OSPM code. The debug version of
11560 code includes the debug output trace mechanism and has a much larger code
11561 and data size. Note that these values will vary depending on the
11563 of the compiler and the compiler options used during generation.
11566 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11567 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11569 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11570 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11573 2) iASL Compiler/Disassembler:
11575 Fixed a parse error during compilation of certain Switch/Case constructs.
11577 simplify the parse, the grammar now allows for multiple Default
11579 and this error is now detected and flagged during the analysis phase.
11581 Disassembler: The disassembly now includes the contents of the original
11582 table header within a comment at the start of the file. This includes the
11583 name and version of the original ASL compiler.
11585 ----------------------------------------
11586 17 November 2005. Summary of changes for version 20051117:
11588 1) ACPI CA Core Subsystem:
11590 Fixed a problem in the AML parser where the method thread count could be
11591 decremented below zero if any errors occurred during the method parse
11593 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
11595 This also fixed a related regression with the mechanism that detects and
11596 corrects methods that cannot properly handle reentrancy (related to the
11597 deployment of the new OwnerId mechanism.)
11599 Eliminated the pre-parsing of control methods (to detect errors) during
11600 table load. Related to the problem above, this was causing unwind issues
11602 any errors occurred during the parse, and it seemed to be overkill. A
11604 load should not be aborted if there are problems with any single control
11605 method, thus rendering this feature rather pointless.
11607 Fixed a problem with the new table-driven resource manager where an
11609 buffer overflow could occur for small resource templates.
11611 Implemented a new external interface, AcpiGetVendorResource. This
11613 will find and return a vendor-defined resource descriptor within a _CRS
11615 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
11618 Removed the length limit (200) on string objects as per the upcoming ACPI
11619 3.0A specification. This affects the following areas of the interpreter:
11621 any implicit conversion of a Buffer to a String, 2) a String object
11623 of the ASL Concatenate operator, 3) the String object result of the ASL
11626 Fixed a problem in the Windows OS interface layer (OSL) where a
11628 on a semaphore object would incorrectly timeout. This allows the
11629 multithreading features of the AcpiExec utility to work properly under
11632 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
11633 the recently added file named "utresrc.c".
11635 Code and Data Size: The current and previous library sizes for the core
11636 subsystem are shown below. These are the code and data sizes for the
11637 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11639 values do not include any ACPI driver or OSPM code. The debug version of
11641 code includes the debug output trace mechanism and has a much larger code
11642 and data size. Note that these values will vary depending on the
11644 of the compiler and the compiler options used during generation.
11647 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11648 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11650 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11651 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11654 2) iASL Compiler/Disassembler:
11656 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
11657 specification. For the iASL compiler, this means that string literals
11659 the source ASL can be of any length.
11661 Enhanced the listing output to dump the AML code for resource descriptors
11662 immediately after the ASL code for each descriptor, instead of in a block
11664 the end of the entire resource template.
11666 Enhanced the compiler debug output to dump the entire original parse tree
11667 constructed during the parse phase, before any transforms are applied to
11669 tree. The transformed tree is dumped also.
11671 ----------------------------------------
11672 02 November 2005. Summary of changes for version 20051102:
11674 1) ACPI CA Core Subsystem:
11676 Modified the subsystem initialization sequence to improve GPE support.
11678 GPE initialization has been split into two parts in order to defer
11680 of the _PRW methods (Power Resources for Wake) until after the hardware
11682 fully initialized and the SCI handler is installed. This allows the _PRW
11683 methods to access fields protected by the Global Lock. This will fix
11685 where a NO_GLOBAL_LOCK exception has been seen during initialization.
11687 Converted the ACPI internal object disassemble and display code within
11689 AML debugger to fully table-driven operation, reducing code size and
11690 increasing maintainability.
11692 Fixed a regression with the ConcatenateResTemplate() ASL operator
11694 in the 20051021 release.
11696 Implemented support for "local" internal ACPI object types within the
11697 debugger "Object" command and the AcpiWalkNamespace external interfaces.
11698 These local types include RegionFields, BankFields, IndexFields, Alias,
11702 Moved common AML resource handling code into a new file, "utresrc.c".
11704 code is shared by both the Resource Manager and the AML Debugger.
11706 Code and Data Size: The current and previous library sizes for the core
11707 subsystem are shown below. These are the code and data sizes for the
11708 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11710 values do not include any ACPI driver or OSPM code. The debug version of
11712 code includes the debug output trace mechanism and has a much larger code
11713 and data size. Note that these values will vary depending on the
11715 of the compiler and the compiler options used during generation.
11718 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11719 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11721 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11722 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11725 2) iASL Compiler/Disassembler:
11727 Fixed a problem with very large initializer lists (more than 4000
11729 for both Buffer and Package objects where the parse stack could overflow.
11731 Enhanced the pre-compile source code scan for non-ASCII characters to
11733 characters within comment fields. The scan is now always performed and is
11735 longer optional, detecting invalid characters within a source file
11736 immediately rather than during the parse phase or later.
11738 Enhanced the ASL grammar definition to force early reductions on all
11740 style grammar elements so that the overall parse stack usage is greatly
11741 reduced. This should improve performance and reduce the possibility of
11745 Eliminated all reduce/reduce conflicts in the iASL parser generation.
11747 with the addition of a %expected statement, the compiler generates from
11748 source with no warnings.
11750 Fixed a possible segment fault in the disassembler if the input filename
11751 does not contain a "dot" extension (Thomas Renninger).
11753 ----------------------------------------
11754 21 October 2005. Summary of changes for version 20051021:
11756 1) ACPI CA Core Subsystem:
11758 Implemented support for the EM64T and other x86-64 processors. This
11759 essentially entails recognizing that these processors support non-aligned
11760 memory transfers. Previously, all 64-bit processors were assumed to lack
11761 hardware support for non-aligned transfers.
11763 Completed conversion of the Resource Manager to nearly full table-driven
11764 operation. Specifically, the resource conversion code (convert AML to
11765 internal format and the reverse) and the debug code to dump internal
11766 resource descriptors are fully table-driven, reducing code and data size
11768 improving maintainability.
11770 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
11772 on 64-bit processors instead of a fixed 32-bit word. (With assistance
11774 Alexey Starikovskiy)
11776 Implemented support within the resource conversion code for the Type-
11777 Specific byte within the various ACPI 3.0 *WordSpace macros.
11779 Fixed some issues within the resource conversion code for the type-
11781 flags for both Memory and I/O address resource descriptors. For Memory,
11782 implemented support for the MTP and TTP flags. For I/O, split the TRS and
11783 TTP flags into two separate fields.
11785 Code and Data Size: The current and previous library sizes for the core
11786 subsystem are shown below. These are the code and data sizes for the
11787 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11789 values do not include any ACPI driver or OSPM code. The debug version of
11791 code includes the debug output trace mechanism and has a much larger code
11792 and data size. Note that these values will vary depending on the
11794 of the compiler and the compiler options used during generation.
11797 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11798 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11800 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11801 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11805 2) iASL Compiler/Disassembler:
11807 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
11809 corresponding ResourceSource string was not also present in a resource
11810 descriptor declaration. This restriction caused problems with existing
11811 AML/ASL code that includes the Index byte without the string. When such
11813 was disassembled, it could not be compiled without modification. Further,
11814 the modified code created a resource template with a different size than
11816 original, breaking code that used fixed offsets into the resource
11820 Removed a recent feature of the disassembler to ignore a lone
11822 byte. This byte is now emitted if present so that the exact AML can be
11823 reproduced when the disassembled code is recompiled.
11825 Improved comments and text alignment for the resource descriptor code
11826 emitted by the disassembler.
11828 Implemented disassembler support for the ACPI 3.0 AccessSize field within
11830 Register() resource descriptor.
11832 ----------------------------------------
11833 30 September 2005. Summary of changes for version 20050930:
11835 1) ACPI CA Core Subsystem:
11837 Completed a major overhaul of the Resource Manager code - specifically,
11838 optimizations in the area of the AML/internal resource conversion code.
11840 code has been optimized to simplify and eliminate duplicated code, CPU
11842 use has been decreased by optimizing function parameters and local
11843 variables, and naming conventions across the manager have been
11845 for clarity and ease of maintenance (this includes function, parameter,
11846 variable, and struct/typedef names.) The update may force changes in some
11847 driver code, depending on how resources are handled by the host OS.
11849 All Resource Manager dispatch and information tables have been moved to a
11850 single location for clarity and ease of maintenance. One new file was
11851 created, named "rsinfo.c".
11853 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
11854 guarantee that the argument is not evaluated twice, making them less
11856 to macro side-effects. However, since there exists the possibility of
11857 additional stack use if a particular compiler cannot optimize them (such
11859 in the debug generation case), the original macros are optionally
11861 Note that some invocations of the return_VALUE macro may now cause size
11862 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
11864 eliminate these. (From Randy Dunlap)
11866 Implemented a new mechanism to enable debug tracing for individual
11868 methods. A new external interface, AcpiDebugTrace, is provided to enable
11869 this mechanism. The intent is to allow the host OS to easily enable and
11870 disable tracing for problematic control methods. This interface can be
11871 easily exposed to a user or debugger interface if desired. See the file
11872 psxface.c for details.
11874 AcpiUtCallocate will now return a valid pointer if a length of zero is
11875 specified - a length of one is used and a warning is issued. This matches
11876 the behavior of AcpiUtAllocate.
11878 Code and Data Size: The current and previous library sizes for the core
11879 subsystem are shown below. These are the code and data sizes for the
11880 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11882 values do not include any ACPI driver or OSPM code. The debug version of
11884 code includes the debug output trace mechanism and has a much larger code
11885 and data size. Note that these values will vary depending on the
11887 of the compiler and the compiler options used during generation.
11890 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11891 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11893 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11894 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11897 2) iASL Compiler/Disassembler:
11899 A remark is issued if the effective compile-time length of a package or
11900 buffer is zero. Previously, this was a warning.
11902 ----------------------------------------
11903 16 September 2005. Summary of changes for version 20050916:
11905 1) ACPI CA Core Subsystem:
11907 Fixed a problem within the Resource Manager where support for the Generic
11908 Register descriptor was not fully implemented. This descriptor is now
11910 recognized, parsed, disassembled, and displayed.
11912 Completely restructured the Resource Manager code to utilize table-driven
11913 dispatch and lookup, eliminating many of the large switch() statements.
11915 reduces overall subsystem code size and code complexity. Affects the
11916 resource parsing and construction, disassembly, and debug dump output.
11918 Cleaned up and restructured the debug dump output for all resource
11919 descriptors. Improved readability of the output and reduced code size.
11921 Fixed a problem where changes to internal data structures caused the
11922 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
11924 Code and Data Size: The current and previous library sizes for the core
11925 subsystem are shown below. These are the code and data sizes for the
11926 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11928 values do not include any ACPI driver or OSPM code. The debug version of
11930 code includes the debug output trace mechanism and has a much larger code
11931 and data size. Note that these values will vary depending on the
11933 of the compiler and the compiler options used during generation.
11936 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11937 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11939 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11940 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11943 2) iASL Compiler/Disassembler:
11945 Updated the disassembler to automatically insert an EndDependentFn()
11947 into the ASL stream if this macro is missing in the original AML code,
11948 simplifying compilation of the resulting ASL module.
11950 Fixed a problem in the disassembler where a disassembled ResourceSource
11951 string (within a large resource descriptor) was not surrounded by quotes
11953 not followed by a comma, causing errors when the resulting ASL module was
11954 compiled. Also, escape sequences within a ResourceSource string are now
11955 handled correctly (especially "\\")
11957 ----------------------------------------
11958 02 September 2005. Summary of changes for version 20050902:
11960 1) ACPI CA Core Subsystem:
11962 Fixed a problem with the internal Owner ID allocation and deallocation
11963 mechanisms for control method execution and recursive method invocation.
11964 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
11965 messages seen on some systems. Recursive method invocation depth is
11966 currently limited to 255. (Alexey Starikovskiy)
11968 Completely eliminated all vestiges of support for the "module-level
11969 executable code" until this support is fully implemented and debugged.
11971 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
11972 some systems that invoke this support.
11974 Fixed a problem within the resource manager code where the transaction
11976 for a 64-bit address descriptor were handled incorrectly in the type-
11977 specific flag byte.
11979 Consolidated duplicate code within the address descriptor resource
11981 code, reducing overall subsystem code size.
11983 Fixed a fault when using the AML debugger "disassemble" command to
11984 disassemble individual control methods.
11986 Removed references to the "release_current" directory within the Unix
11989 Code and Data Size: The current and previous core subsystem library sizes
11990 are shown below. These are the code and data sizes for the acpica.lib
11991 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
11992 include any ACPI driver or OSPM code. The debug version of the code
11994 the debug output trace mechanism and has a much larger code and data
11996 Note that these values will vary depending on the efficiency of the
11998 and the compiler options used during generation.
12001 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12002 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12004 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12005 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12008 2) iASL Compiler/Disassembler:
12010 Implemented an error check for illegal duplicate values in the interrupt
12012 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
12015 Implemented error checking for the Irq() and IrqNoFlags() macros to
12017 too many values in the interrupt list (16 max) and invalid values in the
12018 list (range 0 - 15)
12020 The maximum length string literal within an ASL file is now restricted to
12021 200 characters as per the ACPI specification.
12023 Fixed a fault when using the -ln option (generate namespace listing).
12025 Implemented an error check to determine if a DescriptorName within a
12026 resource descriptor has already been used within the current scope.
12028 ----------------------------------------
12029 15 August 2005. Summary of changes for version 20050815:
12031 1) ACPI CA Core Subsystem:
12033 Implemented a full bytewise compare to determine if a table load request
12035 attempting to load a duplicate table. The compare is performed if the
12037 signatures and table lengths match. This will allow different tables with
12038 the same OEM Table ID and revision to be loaded - probably against the
12040 specification, but discovered in the field nonetheless.
12042 Added the changes.txt logfile to each of the zipped release packages.
12044 Code and Data Size: Current and previous core subsystem library sizes are
12045 shown below. These are the code and data sizes for the acpica.lib
12047 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12048 any ACPI driver or OSPM code. The debug version of the code includes the
12049 debug output trace mechanism and has a much larger code and data size.
12051 that these values will vary depending on the efficiency of the compiler
12053 the compiler options used during generation.
12056 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12057 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12059 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12060 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12063 2) iASL Compiler/Disassembler:
12065 Fixed a problem where incorrect AML code could be generated for Package
12066 objects if optimization is disabled (via the -oa switch).
12068 Fixed a problem with where incorrect AML code is generated for variable-
12069 length packages when the package length is not specified and the number
12071 initializer values is greater than 255.
12074 ----------------------------------------
12075 29 July 2005. Summary of changes for version 20050729:
12077 1) ACPI CA Core Subsystem:
12079 Implemented support to ignore an attempt to install/load a particular
12081 table more than once. Apparently there exists BIOS code that repeatedly
12082 attempts to load the same SSDT upon certain events. With assistance from
12083 Venkatesh Pallipadi.
12085 Restructured the main interface to the AML parser in order to correctly
12086 handle all exceptional conditions. This will prevent leakage of the
12088 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
12090 machines. With assistance from Alexey Starikovskiy.
12092 Support for "module level code" has been disabled in this version due to
12094 number of issues that have appeared on various machines. The support can
12096 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
12097 compilation. When the issues are fully resolved, the code will be enabled
12101 Modified the internal functions for debug print support to define the
12102 FunctionName parameter as a (const char *) for compatibility with
12104 built-in macros such as __FUNCTION__, etc.
12106 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
12108 Implemented support to display an object count summary for the AML
12110 commands Object and Methods.
12112 Code and Data Size: Current and previous core subsystem library sizes are
12113 shown below. These are the code and data sizes for the acpica.lib
12115 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12116 any ACPI driver or OSPM code. The debug version of the code includes the
12117 debug output trace mechanism and has a much larger code and data size.
12119 that these values will vary depending on the efficiency of the compiler
12121 the compiler options used during generation.
12124 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12125 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12127 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12128 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12131 2) iASL Compiler/Disassembler:
12133 Fixed a regression that appeared in the 20050708 version of the compiler
12134 where an error message was inadvertently emitted for invocations of the
12136 reserved control method.
12138 ----------------------------------------
12139 08 July 2005. Summary of changes for version 20050708:
12141 1) ACPI CA Core Subsystem:
12143 The use of the CPU stack in the debug version of the subsystem has been
12144 considerably reduced. Previously, a debug structure was declared in every
12145 function that used the debug macros. This structure has been removed in
12146 favor of declaring the individual elements as parameters to the debug
12147 functions. This reduces the cumulative stack use during nested execution
12149 ACPI function calls at the cost of a small increase in the code size of
12151 debug version of the subsystem. With assistance from Alexey Starikovskiy
12155 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
12156 headers to define a macro that will return the current function name at
12157 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
12159 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
12160 compiler-dependent header, the function name is saved on the CPU stack
12162 pointer per function.) This mechanism is used because apparently there
12163 exists no standard ANSI-C defined macro that that returns the function
12166 Redesigned and reimplemented the "Owner ID" mechanism used to track
12167 namespace objects created/deleted by ACPI tables and control method
12168 execution. A bitmap is now used to allocate and free the IDs, thus
12170 the wraparound problem present in the previous implementation. The size
12172 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
12175 Removed the UINT32_BIT and UINT16_BIT types that were used for the
12177 flag definitions within the headers for the predefined ACPI tables. These
12178 have been replaced by UINT8_BIT in order to increase the code portability
12180 the subsystem. If the use of UINT8 remains a problem, we may be forced to
12181 eliminate bitfields entirely because of a lack of portability.
12183 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
12185 is a frequently used function and this improvement increases the
12187 of the entire subsystem (Alexey Starikovskiy).
12189 Fixed several possible memory leaks and the inverse - premature object
12190 deletion (Alexey Starikovskiy).
12192 Code and Data Size: Current and previous core subsystem library sizes are
12193 shown below. These are the code and data sizes for the acpica.lib
12195 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12196 any ACPI driver or OSPM code. The debug version of the code includes the
12197 debug output trace mechanism and has a much larger code and data size.
12199 that these values will vary depending on the efficiency of the compiler
12201 the compiler options used during generation.
12204 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12205 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12207 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12208 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12210 ----------------------------------------
12211 24 June 2005. Summary of changes for version 20050624:
12213 1) ACPI CA Core Subsystem:
12215 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
12216 the host-defined cache object. This allows the OSL implementation to
12218 and type this object in any manner desired, simplifying the OSL
12219 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
12220 Linux, and should be defined in the OS-specific header file for other
12221 operating systems as required.
12223 Changed the interface to AcpiOsAcquireObject to directly return the
12224 requested object as the function return (instead of ACPI_STATUS.) This
12225 change was made for performance reasons, since this is the purpose of the
12226 interface in the first place. AcpiOsAcquireObject is now similar to the
12227 AcpiOsAllocate interface.
12229 Implemented a new AML debugger command named Businfo. This command
12231 information about all devices that have an associate _PRT object. The
12233 _HID, _UID, and _CID are displayed for these devices.
12235 Modified the initialization sequence in AcpiInitializeSubsystem to call
12237 OSL interface AcpiOslInitialize first, before any local initialization.
12239 change was required because the global initialization now calls OSL
12242 Enhanced the Dump command to display the entire contents of Package
12244 (including all sub-objects and their values.)
12246 Restructured the code base to split some files because of size and/or
12247 because the code logically belonged in a separate file. New files are
12249 below. All makefiles and project files included in the ACPI CA release
12252 utilities/utcache.c /* Local cache interfaces */
12253 utilities/utmutex.c /* Local mutex support */
12254 utilities/utstate.c /* State object support */
12255 interpreter/parser/psloop.c /* Main AML parse loop */
12257 Code and Data Size: Current and previous core subsystem library sizes are
12258 shown below. These are the code and data sizes for the acpica.lib
12260 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12261 any ACPI driver or OSPM code. The debug version of the code includes the
12262 debug output trace mechanism and has a much larger code and data size.
12264 that these values will vary depending on the efficiency of the compiler
12266 the compiler options used during generation.
12269 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12270 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12272 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12273 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12276 2) iASL Compiler/Disassembler:
12278 Fixed a regression introduced in version 20050513 where the use of a
12280 object within a Case() statement caused a compile time exception. The
12281 original behavior has been restored (a Match() operator is emitted.)
12283 ----------------------------------------
12284 17 June 2005. Summary of changes for version 20050617:
12286 1) ACPI CA Core Subsystem:
12288 Moved the object cache operations into the OS interface layer (OSL) to
12290 the host OS to handle these operations if desired (for example, the Linux
12291 OSL will invoke the slab allocator). This support is optional; the
12293 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
12295 code in the ACPI CA core. The new OSL interfaces are shown below. See
12296 utalloc.c for an example implementation, and acpiosxf.h for the exact
12297 interface definitions. With assistance from Alexey Starikovskiy.
12301 AcpiOsAcquireObject
12302 AcpiOsReleaseObject
12304 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
12306 and restore a flags parameter. This fits better with many OS lock models.
12307 Note: the current execution state (interrupt handler or not) is no longer
12308 passed to these interfaces. If necessary, the OSL must determine this
12310 by itself, a simple and fast operation. With assistance from Alexey
12313 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
12314 present if the revision of the RSDP was 2 or greater. According to the
12316 specification, the XSDT is optional in all cases, and the table manager
12317 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
12318 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
12322 Fixed an interpreter problem with the Mid() operator in the case of an
12324 string where the resulting output string is of zero length. It now
12326 returns a valid, null terminated string object instead of a string object
12327 with a null pointer.
12329 Fixed a problem with the control method argument handling to allow a
12331 to an Arg object that already contains an object of type Device. The
12333 object is now correctly overwritten. Previously, an error was returned.
12336 Enhanced the debugger Find command to emit object values in addition to
12338 found object pathnames. The output format is the same as the dump
12342 Enhanced the debugger Set command. It now has the ability to set the
12344 of any Named integer object in the namespace (Previously, only method
12346 and args could be set.)
12348 Code and Data Size: Current and previous core subsystem library sizes are
12349 shown below. These are the code and data sizes for the acpica.lib
12351 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12352 any ACPI driver or OSPM code. The debug version of the code includes the
12353 debug output trace mechanism and has a much larger code and data size.
12355 that these values will vary depending on the efficiency of the compiler
12357 the compiler options used during generation.
12360 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12361 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12363 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12364 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12367 2) iASL Compiler/Disassembler:
12369 Fixed a regression in the disassembler where if/else/while constructs
12371 output incorrectly. This problem was introduced in the previous release
12372 (20050526). This problem also affected the single-step disassembly in the
12375 Fixed a problem where compiling the reserved _OSI method would randomly
12377 rarely) produce compile errors.
12379 Enhanced the disassembler to emit compilable code in the face of
12381 AML resource descriptors. If the optional ResourceSourceIndex is present,
12382 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
12383 disassembly. Otherwise, the resulting code cannot be compiled without
12386 ----------------------------------------
12387 26 May 2005. Summary of changes for version 20050526:
12389 1) ACPI CA Core Subsystem:
12391 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
12392 the module level (not within a control method.) These opcodes are
12394 exactly once at the time the table is loaded. This type of code was legal
12396 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
12398 order to provide backwards compatibility with earlier BIOS
12400 This eliminates the "Encountered executable code at module level" warning
12401 that was previously generated upon detection of such code.
12403 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
12404 inadvertently be generated during the lookup of namespace objects in the
12405 second pass parse of ACPI tables and control methods. It appears that
12407 problem could occur during the resolution of forward references to
12411 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
12412 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
12413 allows the deadlock detection debug code to be compiled out in the normal
12414 case, improving mutex performance (and overall subsystem performance)
12417 Implemented a handful of miscellaneous fixes for possible memory leaks on
12418 error conditions and error handling control paths. These fixes were
12419 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
12421 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
12423 to prevent a fault in this error case.
12425 Code and Data Size: Current and previous core subsystem library sizes are
12426 shown below. These are the code and data sizes for the acpica.lib
12428 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12429 any ACPI driver or OSPM code. The debug version of the code includes the
12430 debug output trace mechanism and has a much larger code and data size.
12432 that these values will vary depending on the efficiency of the compiler
12434 the compiler options used during generation.
12437 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12438 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12440 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12441 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12444 2) iASL Compiler/Disassembler:
12446 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
12447 the module level (not within a control method.) These operators will be
12448 executed once at the time the table is loaded. This type of code was
12450 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
12451 compiler in order to provide backwards compatibility with earlier BIOS
12455 The ACPI integer width (specified via the table revision ID or the -r
12456 override, 32 or 64 bits) is now used internally during compile-time
12458 folding to ensure that constants are truncated to 32 bits if necessary.
12459 Previously, the revision ID value was only emitted in the AML table
12462 An error message is now generated for the Mutex and Method operators if
12464 SyncLevel parameter is outside the legal range of 0 through 15.
12466 Fixed a problem with the Method operator ParameterTypes list handling
12468 3.0). Previously, more than 2 types or 2 arguments generated a syntax
12470 The actual underlying implementation of method argument typechecking is
12471 still under development, however.
12473 ----------------------------------------
12474 13 May 2005. Summary of changes for version 20050513:
12476 1) ACPI CA Core Subsystem:
12478 Implemented support for PCI Express root bridges -- added support for
12480 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
12482 The interpreter now automatically truncates incoming 64-bit constants to
12484 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
12486 also affects the iASL compiler constant folding. (Note: as per below, the
12487 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
12489 Fixed a problem where string and buffer objects with "static" pointers
12490 (pointers to initialization data within an ACPI table) were not handled
12491 consistently. The internal object copy operation now always copies the
12493 to a newly allocated buffer, regardless of whether the source object is
12496 Fixed a problem with the FromBCD operator where an implicit result
12497 conversion was improperly performed while storing the result to the
12499 operand. Since this is an "explicit conversion" operator, the implicit
12500 conversion should never be performed on the output.
12502 Fixed a problem with the CopyObject operator where a copy to an existing
12503 named object did not always completely overwrite the existing object
12505 at name. Specifically, a buffer-to-buffer copy did not delete the
12509 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
12511 structs for consistency.
12513 Code and Data Size: Current and previous core subsystem library sizes are
12514 shown below. These are the code and data sizes for the acpica.lib
12516 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12517 any ACPI driver or OSPM code. The debug version of the code includes the
12518 debug output trace mechanism and has a much larger code and data size.
12520 that these values will vary depending on the efficiency of the compiler
12522 the compiler options used during generation.
12525 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12526 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12527 Current Release: (Same sizes)
12528 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12529 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12532 2) iASL Compiler/Disassembler:
12534 The compiler now emits a warning if an attempt is made to generate a 64-
12536 integer constant from within a 32-bit ACPI table (Revision < 2). The
12538 is truncated to 32 bits.
12540 Fixed a problem with large package objects: if the static length of the
12541 package is greater than 255, the "variable length package" opcode is
12542 emitted. Previously, this caused an error. This requires an update to the
12543 ACPI spec, since it currently (incorrectly) states that packages larger
12545 255 elements are not allowed.
12547 The disassembler now correctly handles variable length packages and
12549 larger than 255 elements.
12551 ----------------------------------------
12552 08 April 2005. Summary of changes for version 20050408:
12554 1) ACPI CA Core Subsystem:
12556 Fixed three cases in the interpreter where an "index" argument to an ASL
12557 function was still (internally) 32 bits instead of the required 64 bits.
12558 This was the Index argument to the Index, Mid, and Match operators.
12560 The "strupr" function is now permanently local (AcpiUtStrupr), since this
12562 not a POSIX-defined function and not present in most kernel-level C
12563 libraries. All references to the C library strupr function have been
12567 Completed the deployment of static functions/prototypes. All prototypes
12569 the static attribute have been moved from the headers to the owning C
12572 Implemented an extract option (-e) for the AcpiBin utility (AML binary
12573 utility). This option allows the utility to extract individual ACPI
12575 from the output of AcpiDmp. It provides the same functionality of the
12576 acpixtract.pl perl script without the worry of setting the correct perl
12577 options. AcpiBin runs on Windows and has not yet been generated/validated
12579 the Linux/Unix environment (but should be soon).
12581 Updated and fixed the table dump option for AcpiBin (-d). This option
12582 converts a single ACPI table to a hex/ascii file, similar to the output
12586 Code and Data Size: Current and previous core subsystem library sizes are
12587 shown below. These are the code and data sizes for the acpica.lib
12589 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12590 any ACPI driver or OSPM code. The debug version of the code includes the
12591 debug output trace mechanism and has a much larger code and data size.
12593 that these values will vary depending on the efficiency of the compiler
12595 the compiler options used during generation.
12598 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12599 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12601 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12602 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12605 2) iASL Compiler/Disassembler:
12607 Disassembler fix: Added a check to ensure that the table length found in
12609 ACPI table header within the input file is not longer than the actual
12611 file size. This indicates some kind of file or table corruption.
12613 ----------------------------------------
12614 29 March 2005. Summary of changes for version 20050329:
12616 1) ACPI CA Core Subsystem:
12618 An error is now generated if an attempt is made to create a Buffer Field
12620 length zero (A CreateField with a length operand of zero.)
12622 The interpreter now issues a warning whenever executable code at the
12624 level is detected during ACPI table load. This will give some idea of the
12625 prevalence of this type of code.
12627 Implemented support for references to named objects (other than control
12628 methods) within package objects.
12630 Enhanced package object output for the debug object. Package objects are
12632 completely dumped, showing all elements.
12634 Enhanced miscellaneous object output for the debug object. Any object can
12635 now be written to the debug object (for example, a device object can be
12636 written, and the type of the object will be displayed.)
12638 The "static" qualifier has been added to all local functions across both
12640 core subsystem and the iASL compiler.
12642 The number of "long" lines (> 80 chars) within the source has been
12643 significantly reduced, by about 1/3.
12645 Cleaned up all header files to ensure that all CA/iASL functions are
12646 prototyped (even static functions) and the formatting is consistent.
12648 Two new header files have been added, acopcode.h and acnames.h.
12650 Removed several obsolete functions that were no longer used.
12652 Code and Data Size: Current and previous core subsystem library sizes are
12653 shown below. These are the code and data sizes for the acpica.lib
12655 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12656 any ACPI driver or OSPM code. The debug version of the code includes the
12657 debug output trace mechanism and has a much larger code and data size.
12659 that these values will vary depending on the efficiency of the compiler
12661 the compiler options used during generation.
12664 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12665 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12667 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12668 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12672 2) iASL Compiler/Disassembler:
12674 Fixed a problem with the resource descriptor generation/support. For the
12675 ResourceSourceIndex and the ResourceSource fields, both must be present,
12677 both must be not present - can't have one without the other.
12679 The compiler now returns non-zero from the main procedure if any errors
12681 occurred during the compilation.
12684 ----------------------------------------
12685 09 March 2005. Summary of changes for version 20050309:
12687 1) ACPI CA Core Subsystem:
12689 The string-to-buffer implicit conversion code has been modified again
12691 a change to the ACPI specification. In order to match the behavior of
12693 other major ACPI implementation, the target buffer is no longer truncated
12695 the source string is smaller than an existing target buffer. This change
12696 requires an update to the ACPI spec, and should eliminate the recent
12697 AE_AML_BUFFER_LIMIT issues.
12699 The "implicit return" support was rewritten to a new algorithm that
12701 the general case. Rather than attempt to determine when a method is about
12703 exit, the result of every ASL operator is saved momentarily until the
12705 next ASL operator is executed. Therefore, no matter how the method exits,
12706 there will always be a saved implicit return value. This feature is only
12707 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
12709 AE_AML_NO_RETURN_VALUE errors when enabled.
12711 Implemented implicit conversion support for the predicate (operand) of
12713 If, Else, and While operators. String and Buffer arguments are
12715 converted to Integers.
12717 Changed the string-to-integer conversion behavior to match the new ACPI
12718 errata: "If no integer object exists, a new integer is created. The ASCII
12719 string is interpreted as a hexadecimal constant. Each string character is
12720 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
12721 with the first character as the most significant digit, and ending with
12723 first non-hexadecimal character or end-of-string." This means that the
12725 non-hex character terminates the conversion and this is the code that was
12728 Fixed a problem where the ObjectType operator would fail (fault) when
12730 on an Index of a Package which pointed to a null package element. The
12731 operator now properly returns zero (Uninitialized) in this case.
12733 Fixed a problem where the While operator used excessive memory by not
12734 properly popping the result stack during execution. There was no memory
12736 after execution, however. (Code provided by Valery Podrezov.)
12738 Fixed a problem where references to control methods within Package
12740 caused the method to be invoked, instead of producing a reference object
12741 pointing to the method.
12743 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
12745 improve performance and reduce code size. (Code provided by Alexey
12748 Code and Data Size: Current and previous core subsystem library sizes are
12749 shown below. These are the code and data sizes for the acpica.lib
12751 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12752 any ACPI driver or OSPM code. The debug version of the code includes the
12753 debug output trace mechanism and has a much larger code and data size.
12755 that these values will vary depending on the efficiency of the compiler
12757 the compiler options used during generation.
12760 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12761 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12763 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12764 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12767 2) iASL Compiler/Disassembler:
12769 Fixed a problem with the Return operator with no arguments. Since the AML
12770 grammar for the byte encoding requires an operand for the Return opcode,
12772 compiler now emits a Return(Zero) for this case. An ACPI specification
12773 update has been written for this case.
12775 For tables other than the DSDT, namepath optimization is automatically
12776 disabled. This is because SSDTs can be loaded anywhere in the namespace,
12778 compiler has no knowledge of where, and thus cannot optimize namepaths.
12780 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
12781 inadvertently omitted from the ACPI specification, and will require an
12782 update to the spec.
12784 The source file scan for ASCII characters is now optional (-a). This
12786 was made because some vendors place non-ascii characters within comments.
12787 However, the scan is simply a brute-force byte compare to ensure all
12788 characters in the file are in the range 0x00 to 0x7F.
12790 Fixed a problem with the CondRefOf operator where the compiler was
12791 inappropriately checking for the existence of the target. Since the point
12793 the operator is to check for the existence of the target at run-time, the
12794 compiler no longer checks for the target existence.
12796 Fixed a problem where errors generated from the internal AML interpreter
12797 during constant folding were not handled properly, causing a fault.
12799 Fixed a problem with overly aggressive range checking for the Stall
12800 operator. The valid range (max 255) is now only checked if the operand is
12802 type Integer. All other operand types cannot be statically checked.
12804 Fixed a problem where control method references within the RefOf,
12806 and ObjectType operators were not treated properly. They are now treated
12808 actual references, not method invocations.
12810 Fixed and enhanced the "list namespace" option (-ln). This option was
12812 a number of releases ago.
12814 Improved error handling for the Field, IndexField, and BankField
12816 The compiler now cleanly reports and recovers from errors in the field
12817 component (FieldUnit) list.
12819 Fixed a disassembler problem where the optional ResourceDescriptor fields
12820 TRS and TTP were not always handled correctly.
12822 Disassembler - Comments in output now use "//" instead of "/*"
12824 ----------------------------------------
12825 28 February 2005. Summary of changes for version 20050228:
12827 1) ACPI CA Core Subsystem:
12829 Fixed a problem where the result of an Index() operator (an object
12830 reference) must increment the reference count on the target object for
12832 life of the object reference.
12834 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
12835 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
12837 resource descriptors.
12839 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
12840 Space Descriptor" string, indicating interpreter support for the
12844 Implemented header support for the new ACPI 3.0 FADT flag bits.
12846 Implemented header support for the new ACPI 3.0 PCI Express bits for the
12848 status/enable registers.
12850 Updated header support for the MADT processor local Apic struct and MADT
12851 platform interrupt source struct for new ACPI 3.0 fields.
12853 Implemented header support for the SRAT and SLIT ACPI tables.
12855 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
12859 Code and Data Size: Current and previous core subsystem library sizes are
12860 shown below. These are the code and data sizes for the acpica.lib
12862 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12863 any ACPI driver or OSPM code. The debug version of the code includes the
12864 debug output trace mechanism and has a much larger code and data size.
12866 that these values will vary depending on the efficiency of the compiler
12868 the compiler options used during generation.
12871 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12872 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12874 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12875 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12878 2) iASL Compiler/Disassembler:
12880 Fixed a problem with the internal 64-bit String-to-integer conversion
12882 strings less than two characters long.
12884 Fixed a problem with constant folding where the result of the Index()
12885 operator can not be considered a constant. This means that Index() cannot
12887 a type3 opcode and this will require an update to the ACPI specification.
12889 Disassembler: Implemented support for the TTP, MTP, and TRS resource
12890 descriptor fields. These fields were inadvertently ignored and not output
12892 the disassembly of the resource descriptor.
12895 ----------------------------------------
12896 11 February 2005. Summary of changes for version 20050211:
12898 1) ACPI CA Core Subsystem:
12900 Implemented ACPI 3.0 support for implicit conversion within the Match()
12901 operator. MatchObjects can now be of type integer, buffer, or string
12903 of just type integer. Package elements are implicitly converted to the
12905 of the MatchObject. This change aligns the behavior of Match() with the
12906 behavior of the other logical operators (LLess(), etc.) It also requires
12908 errata change to the ACPI specification as this support was intended for
12909 ACPI 3.0, but was inadvertently omitted.
12911 Fixed a problem with the internal implicit "to buffer" conversion.
12913 that are converted to buffers will cause buffer truncation if the string
12915 smaller than the target buffer. Integers that are converted to buffers
12917 not cause buffer truncation, only zero extension (both as per the ACPI
12918 spec.) The problem was introduced when code was added to truncate the
12919 buffer, but this should not be performed in all cases, only the string
12922 Fixed a problem with the Buffer and Package operators where the
12924 would get confused if two such operators were used as operands to an ASL
12925 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
12926 stack was not being popped after the execution of these operators,
12928 in an AE_NO_RETURN_VALUE exception.
12930 Fixed a problem with constructs of the form Store(Index(...),...). The
12931 reference object returned from Index was inadvertently resolved to an
12933 value. This problem was introduced in version 20050114 when the behavior
12935 Store() was modified to restrict the object types that can be used as the
12936 source operand (to match the ACPI specification.)
12938 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
12940 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
12942 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
12944 Code and Data Size: Current and previous core subsystem library sizes are
12945 shown below. These are the code and data sizes for the acpica.lib
12947 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12948 any ACPI driver or OSPM code. The debug version of the code includes the
12949 debug output trace mechanism and has a much larger code and data size.
12951 that these values will vary depending on the efficiency of the compiler
12953 the compiler options used during generation.
12956 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12957 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12959 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12960 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12963 2) iASL Compiler/Disassembler:
12965 Fixed a code generation problem in the constant folding optimization code
12966 where incorrect code was generated if a constant was reduced to a buffer
12967 object (i.e., a reduced type 5 opcode.)
12969 Fixed a typechecking problem for the ToBuffer operator. Caused by an
12970 incorrect return type in the internal opcode information table.
12972 ----------------------------------------
12973 25 January 2005. Summary of changes for version 20050125:
12975 1) ACPI CA Core Subsystem:
12977 Fixed a recently introduced problem with the Global Lock where the
12978 underlying semaphore was not created. This problem was introduced in
12979 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
12980 Acquire() operation on _GL.
12982 The local object cache is now optional, and is disabled by default. Both
12983 AcpiExec and the iASL compiler enable the cache because they run in user
12984 mode and this enhances their performance. #define
12985 ACPI_ENABLE_OBJECT_CACHE
12986 to enable the local cache.
12988 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
12990 optional "implicit return" support where an error was returned if no
12992 object was expected, but one was implicitly returned. AE_OK is now
12994 in this case and the implicitly returned object is deleted.
12995 AcpiUtEvaluateObject is only occasionally used, and only to execute
12997 methods such as _STA and _INI where the return type is known up front.
12999 Fixed a few issues with the internal convert-to-integer code. It now
13001 an error if an attempt is made to convert a null string, a string of only
13002 blanks/tabs, or a zero-length buffer. This affects both implicit
13004 and explicit conversion via the ToInteger() operator.
13006 The internal debug code in AcpiUtAcquireMutex has been commented out. It
13008 not needed for normal operation and should increase the performance of
13010 entire subsystem. The code remains in case it is needed for debug
13014 The AcpiExec source and makefile are included in the Unix/Linux package
13018 Code and Data Size: Current and previous core subsystem library sizes are
13019 shown below. These are the code and data sizes for the acpica.lib
13021 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13022 any ACPI driver or OSPM code. The debug version of the code includes the
13023 debug output trace mechanism and has a much larger code and data size.
13025 that these values will vary depending on the efficiency of the compiler
13027 the compiler options used during generation.
13030 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13031 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13033 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13034 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13036 2) iASL Compiler/Disassembler:
13038 Switch/Case support: A warning is now issued if the type of the Switch
13040 cannot be determined at compile time. For example, Switch(Arg0) will
13041 generate the warning, and the type is assumed to be an integer. As per
13043 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
13047 Switch/Case support: Implemented support for buffer and string objects as
13048 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
13049 buffers and strings.
13051 Switch/Case support: The emitted code for the LEqual() comparisons now
13053 the switch value as the first operand, not the second. The case value is
13055 the second operand, and this allows the case value to be implicitly
13056 converted to the type of the switch value, not the other way around.
13058 Switch/Case support: Temporary variables are now emitted immediately
13060 the control method, not at the global level. This means that there are
13062 36 temps available per-method, not 36 temps per-module as was the case
13064 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
13066 ----------------------------------------
13067 14 January 2005. Summary of changes for version 20050114:
13069 Added 2005 copyright to all module headers. This affects every module in
13070 the core subsystem, iASL compiler, and the utilities.
13072 1) ACPI CA Core Subsystem:
13074 Fixed an issue with the String-to-Buffer conversion code where the string
13075 null terminator was not included in the buffer after conversion, but
13077 is existing ASL that assumes the string null terminator is included. This
13079 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
13080 introduced in the previous version when the code was updated to correctly
13081 set the converted buffer size as per the ACPI specification. The ACPI
13083 is ambiguous and will be updated to specify that the null terminator must
13085 included in the converted buffer. This also affects the ToBuffer() ASL
13088 Fixed a problem with the Mid() ASL/AML operator where it did not work
13089 correctly on Buffer objects. Newly created sub-buffers were not being
13094 Fixed a problem in AcpiTbFindTable where incorrect string compares were
13095 performed on the OemId and OemTableId table header fields. These fields
13097 not null terminated, so strncmp is now used instead of strcmp.
13099 Implemented a restriction on the Store() ASL/AML operator to align the
13100 behavior with the ACPI specification. Previously, any object could be
13102 as the source operand. Now, the only objects that may be used are
13104 Buffers, Strings, Packages, Object References, and DDB Handles. If
13105 necessary, the original behavior can be restored by enabling the
13106 EnableInterpreterSlack flag.
13108 Enhanced the optional "implicit return" support to allow an implicit
13110 value from methods that are invoked externally via the AcpiEvaluateObject
13111 interface. This enables implicit returns from the _STA and _INI methods,
13114 Changed the Revision() ASL/AML operator to return the current version of
13116 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
13118 the supported ACPI version (This is the function of the _REV method).
13120 Updated the _REV predefined method to return the currently supported
13124 Implemented batch mode option for the AcpiExec utility (-b).
13126 Code and Data Size: Current and previous core subsystem library sizes are
13127 shown below. These are the code and data sizes for the acpica.lib
13129 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13130 any ACPI driver or OSPM code. The debug version of the code includes the
13131 debug output trace mechanism and has a much larger code and data size.
13133 that these values will vary depending on the efficiency of the compiler
13135 the compiler options used during generation.
13138 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13139 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13141 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13142 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13144 ----------------------------------------
13145 10 December 2004. Summary of changes for version 20041210:
13147 ACPI 3.0 support is nearing completion in both the iASL compiler and the
13148 ACPI CA core subsystem.
13150 1) ACPI CA Core Subsystem:
13152 Fixed a problem in the ToDecimalString operator where the resulting
13154 length was incorrectly calculated. The length is now calculated exactly,
13155 eliminating incorrect AE_STRING_LIMIT exceptions.
13157 Fixed a problem in the ToHexString operator to allow a maximum 200
13159 string to be produced.
13161 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
13163 routine where the length of the resulting buffer was not truncated to the
13164 new size (if the target buffer already existed).
13166 Code and Data Size: Current and previous core subsystem library sizes are
13167 shown below. These are the code and data sizes for the acpica.lib
13169 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13170 any ACPI driver or OSPM code. The debug version of the code includes the
13171 debug output trace mechanism and has a much larger code and data size.
13173 that these values will vary depending on the efficiency of the compiler
13175 the compiler options used during generation.
13178 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13179 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13181 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13182 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13185 2) iASL Compiler/Disassembler:
13187 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
13188 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
13189 Includes support in the disassembler.
13191 Implemented support for the new (ACPI 3.0) parameter to the Register
13195 Fixed a problem where the _HE resource name for the Interrupt macro was
13196 referencing bit 0 instead of bit 1.
13198 Implemented check for maximum 255 interrupts in the Interrupt macro.
13200 Fixed a problem with the predefined resource descriptor names where
13201 incorrect AML code was generated if the offset within the resource buffer
13202 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
13203 but did not update the surrounding package lengths.
13205 Changes to the Dma macro: All channels within the channel list must be
13207 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
13208 optional (default is BusMaster).
13210 Implemented check for maximum 7 data bytes for the VendorShort macro.
13212 The ReadWrite parameter is now optional for the Memory32 and similar
13215 ----------------------------------------
13216 03 December 2004. Summary of changes for version 20041203:
13218 1) ACPI CA Core Subsystem:
13220 The low-level field insertion/extraction code (exfldio) has been
13222 rewritten to eliminate unnecessary complexity, bugs, and boundary
13225 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
13227 operators where the input operand could be inadvertently deleted if no
13228 conversion was necessary (e.g., if the input to ToInteger was an Integer
13231 Fixed a problem with the ToDecimalString and ToHexString where an
13233 exception code was returned if the resulting string would be > 200 chars.
13234 AE_STRING_LIMIT is now returned.
13236 Fixed a problem with the Concatenate operator where AE_OK was always
13237 returned, even if the operation failed.
13239 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
13240 semaphores to be allocated.
13242 Code and Data Size: Current and previous core subsystem library sizes are
13243 shown below. These are the code and data sizes for the acpica.lib
13245 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13246 any ACPI driver or OSPM code. The debug version of the code includes the
13247 debug output trace mechanism and has a much larger code and data size.
13249 that these values will vary depending on the efficiency of the compiler
13251 the compiler options used during generation.
13254 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13255 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13257 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13258 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13261 2) iASL Compiler/Disassembler:
13263 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
13264 recently introduced in 20041119.
13266 Fixed a problem with the ToUUID macro where the upper nybble of each
13268 byte was inadvertently set to zero.
13270 ----------------------------------------
13271 19 November 2004. Summary of changes for version 20041119:
13273 1) ACPI CA Core Subsystem:
13275 Fixed a problem in the internal ConvertToInteger routine where new
13277 were not truncated to 32 bits for 32-bit ACPI tables. This routine
13279 buffers and strings to integers.
13281 Implemented support to store a value to an Index() on a String object.
13283 is an ACPI 2.0 feature that had not yet been implemented.
13285 Implemented new behavior for storing objects to individual package
13287 (via the Index() operator). The previous behavior was to invoke the
13289 conversion rules if an object was already present at the index. The new
13290 behavior is to simply delete any existing object and directly store the
13292 object. Although the ACPI specification seems unclear on this subject,
13294 ACPI implementations behave in this manner. (This is the root of the
13295 AE_BAD_HEX_CONSTANT issue.)
13297 Modified the RSDP memory scan mechanism to support the extended checksum
13299 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
13300 RSDP signature is found with a valid checksum.
13302 Code and Data Size: Current and previous core subsystem library sizes are
13303 shown below. These are the code and data sizes for the acpica.lib
13305 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13306 any ACPI driver or OSPM code. The debug version of the code includes the
13307 debug output trace mechanism and has a much larger code and data size.
13309 that these values will vary depending on the efficiency of the compiler
13311 the compiler options used during generation.
13314 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13315 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13317 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13318 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13321 2) iASL Compiler/Disassembler:
13323 Fixed a missing semicolon in the aslcompiler.y file.
13325 ----------------------------------------
13326 05 November 2004. Summary of changes for version 20041105:
13328 1) ACPI CA Core Subsystem:
13330 Implemented support for FADT revision 2. This was an interim table
13332 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
13334 Implemented optional support to allow uninitialized LocalX and ArgX
13335 variables in a control method. The variables are initialized to an
13337 object with a value of zero. This support is enabled by setting the
13338 AcpiGbl_EnableInterpreterSlack flag to TRUE.
13340 Implemented support for Integer objects for the SizeOf operator. Either
13342 or 8 is returned, depending on the current integer size (32-bit or 64-
13344 depending on the parent table revision).
13346 Fixed a problem in the implementation of the SizeOf and ObjectType
13348 where the operand was resolved to a value too early, causing incorrect
13349 return values for some objects.
13351 Fixed some possible memory leaks during exceptional conditions.
13353 Code and Data Size: Current and previous core subsystem library sizes are
13354 shown below. These are the code and data sizes for the acpica.lib
13356 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13357 any ACPI driver or OSPM code. The debug version of the code includes the
13358 debug output trace mechanism and has a much larger code and data size.
13360 that these values will vary depending on the efficiency of the compiler
13362 the compiler options used during generation.
13365 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13366 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13368 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13369 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13372 2) iASL Compiler/Disassembler:
13374 Implemented support for all ACPI 3.0 reserved names and methods.
13376 Implemented all ACPI 3.0 grammar elements in the front-end, including
13377 support for semicolons.
13379 Implemented the ACPI 3.0 Function() and ToUUID() macros
13381 Fixed a problem in the disassembler where a Scope() operator would not be
13382 emitted properly if the target of the scope was in another table.
13384 ----------------------------------------
13385 15 October 2004. Summary of changes for version 20041015:
13387 Note: ACPI CA is currently undergoing an in-depth and complete formal
13388 evaluation to test/verify the following areas. Other suggestions are
13389 welcome. This will result in an increase in the frequency of releases and
13390 the number of bug fixes in the next few months.
13391 - Functional tests for all ASL/AML operators
13392 - All implicit/explicit type conversions
13393 - Bit fields and operation regions
13394 - 64-bit math support and 32-bit-only "truncated" math support
13395 - Exceptional conditions, both compiler and interpreter
13396 - Dynamic object deletion and memory leaks
13397 - ACPI 3.0 support when implemented
13398 - External interfaces to the ACPI subsystem
13401 1) ACPI CA Core Subsystem:
13403 Fixed two alignment issues on 64-bit platforms - within debug statements
13405 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
13407 field within the non-aligned ACPI generic address structure.
13409 Fixed a problem in the Increment and Decrement operators where incorrect
13410 operand resolution could result in the inadvertent modification of the
13411 original integer when the integer is passed into another method as an
13412 argument and the arg is then incremented/decremented.
13414 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
13416 BCD number were truncated during conversion.
13418 Fixed a problem in the ToDecimal operator where the length of the
13420 string could be set incorrectly too long if the input operand was a
13424 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
13426 within a buffer would prematurely terminate a compare between buffer
13429 Added a check for string overflow (>200 characters as per the ACPI
13430 specification) during the Concatenate operator with two string operands.
13432 Code and Data Size: Current and previous core subsystem library sizes are
13433 shown below. These are the code and data sizes for the acpica.lib
13435 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13436 any ACPI driver or OSPM code. The debug version of the code includes the
13437 debug output trace mechanism and has a much larger code and data size.
13439 that these values will vary depending on the efficiency of the compiler
13441 the compiler options used during generation.
13444 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13445 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13447 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13448 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13452 2) iASL Compiler/Disassembler:
13454 Allow the use of the ObjectType operator on uninitialized Locals and Args
13455 (returns 0 as per the ACPI specification).
13457 Fixed a problem where the compiler would fault if there was a syntax
13459 in the FieldName of all of the various CreateXXXField operators.
13461 Disallow the use of lower case letters within the EISAID macro, as per
13463 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
13465 U is an uppercase letter and N is a hex digit.
13468 ----------------------------------------
13469 06 October 2004. Summary of changes for version 20041006:
13471 1) ACPI CA Core Subsystem:
13473 Implemented support for the ACPI 3.0 Timer operator. This ASL function
13474 implements a 64-bit timer with 100 nanosecond granularity.
13476 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
13477 implement the ACPI 3.0 Timer operator. This allows the host OS to
13479 the timer with the best clock available. Also, it keeps the core
13481 out of the clock handling business, since the host OS (usually) performs
13484 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
13485 functions use a 64-bit address which is part of the packed ACPI Generic
13486 Address Structure. Since the structure is non-aligned, the alignment
13488 are now used to extract the address to a local variable before use.
13490 Fixed a problem where the ToInteger operator assumed all input strings
13492 hexadecimal. The operator now handles both decimal strings and hex
13494 (prefixed with "0x").
13496 Fixed a problem where the string length in the string object created as a
13497 result of the internal ConvertToString procedure could be incorrect. This
13498 potentially affected all implicit conversions and also the
13500 and ToHexString operators.
13502 Fixed two problems in the ToString operator. If the length parameter was
13503 zero, an incorrect string object was created and the value of the input
13504 length parameter was inadvertently changed from zero to Ones.
13506 Fixed a problem where the optional ResourceSource string in the
13508 resource macro was ignored.
13510 Simplified the interfaces to the internal division functions, reducing
13512 size and complexity.
13514 Code and Data Size: Current and previous core subsystem library sizes are
13515 shown below. These are the code and data sizes for the acpica.lib
13517 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13518 any ACPI driver or OSPM code. The debug version of the code includes the
13519 debug output trace mechanism and has a much larger code and data size.
13521 that these values will vary depending on the efficiency of the compiler
13523 the compiler options used during generation.
13526 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13527 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13529 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13530 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13533 2) iASL Compiler/Disassembler:
13535 Implemented support for the ACPI 3.0 Timer operator.
13537 Fixed a problem where the Default() operator was inadvertently ignored in
13539 Switch/Case block. This was a problem in the translation of the Switch
13540 statement to If...Else pairs.
13542 Added support to allow a standalone Return operator, with no parentheses
13546 Fixed a problem with code generation for the ElseIf operator where the
13547 translated Else...If parse tree was improperly constructed leading to the
13550 ----------------------------------------
13551 22 September 2004. Summary of changes for version 20040922:
13553 1) ACPI CA Core Subsystem:
13555 Fixed a problem with the implementation of the LNot() operator where
13557 was not returned for the TRUE case. Changed the code to return Ones
13559 of (!Arg) which was usually 1. This change affects iASL constant folding
13561 this operator also.
13563 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
13565 initialized properly -- Now zero the entire buffer in this case where the
13566 buffer already exists.
13568 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
13569 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
13570 related code considerably. This will require changes/updates to all OS
13571 interface layers (OSLs.)
13573 Implemented a new external interface, AcpiInstallExceptionHandler, to
13575 a system exception handler to be installed. This handler is invoked upon
13577 run-time exception that occurs during control method execution.
13579 Added support for the DSDT in AcpiTbFindTable. This allows the
13580 DataTableRegion() operator to access the local copy of the DSDT.
13582 Code and Data Size: Current and previous core subsystem library sizes are
13583 shown below. These are the code and data sizes for the acpica.lib
13585 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13586 any ACPI driver or OSPM code. The debug version of the code includes the
13587 debug output trace mechanism and has a much larger code and data size.
13589 that these values will vary depending on the efficiency of the compiler
13591 the compiler options used during generation.
13594 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13595 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13597 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13598 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13601 2) iASL Compiler/Disassembler:
13603 Fixed a problem with constant folding and the LNot operator. LNot was
13604 returning 1 in the TRUE case, not Ones as per the ACPI specification.
13606 could result in the generation of an incorrect folded/reduced constant.
13608 End-Of-File is now allowed within a "//"-style comment. A parse error no
13609 longer occurs if such a comment is at the very end of the input ASL
13613 Implemented the "-r" option to override the Revision in the table header.
13614 The initial use of this option will be to simplify the evaluation of the
13616 interpreter by allowing a single ASL source module to be compiled for
13618 32-bit or 64-bit integers.
13621 ----------------------------------------
13622 27 August 2004. Summary of changes for version 20040827:
13624 1) ACPI CA Core Subsystem:
13626 - Implemented support for implicit object conversion in the non-numeric
13627 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
13629 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
13630 the second operand is implicitly converted on the fly to match the type
13632 the first operand. For example:
13634 LEqual (Source1, Source2)
13636 Source1 and Source2 must each evaluate to an integer, a string, or a
13638 The data type of Source1 dictates the required type of Source2. Source2
13640 implicitly converted if necessary to match the type of Source1.
13642 - Updated and corrected the behavior of the string conversion support.
13644 rules concerning conversion of buffers to strings (according to the ACPI
13645 specification) are as follows:
13647 ToDecimalString - explicit byte-wise conversion of buffer to string of
13648 decimal values (0-255) separated by commas. ToHexString - explicit byte-
13650 conversion of buffer to string of hex values (0-FF) separated by commas.
13651 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
13653 copy with no transform except NULL terminated. Any other implicit buffer-
13655 string conversion - byte-wise conversion of buffer to string of hex
13657 (0-FF) separated by spaces.
13659 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
13661 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
13663 one byte too short in the case of a node in the root scope. This could
13664 cause a fault during debug output.
13666 - Code and Data Size: Current and previous core subsystem library sizes
13668 shown below. These are the code and data sizes for the acpica.lib
13670 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13671 any ACPI driver or OSPM code. The debug version of the code includes the
13672 debug output trace mechanism and has a much larger code and data size.
13674 that these values will vary depending on the efficiency of the compiler
13676 the compiler options used during generation.
13679 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13680 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13682 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13683 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13686 2) iASL Compiler/Disassembler:
13688 - Fixed a Linux generation error.
13691 ----------------------------------------
13692 16 August 2004. Summary of changes for version 20040816:
13694 1) ACPI CA Core Subsystem:
13696 Designed and implemented support within the AML interpreter for the so-
13697 called "implicit return". This support returns the result of the last
13699 operation within a control method, in the absence of an explicit Return()
13700 operator. A few machines depend on this behavior, even though it is not
13701 explicitly supported by the ASL language. It is optional support that
13703 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
13705 Removed support for the PCI_Config address space from the internal low
13707 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
13708 support was not used internally, and would not work correctly anyway
13710 the PCI bus number and segment number were not supported. There are
13711 separate interfaces for PCI configuration space access because of the
13715 Code and Data Size: Current and previous core subsystem library sizes are
13716 shown below. These are the code and data sizes for the acpica.lib
13718 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13719 any ACPI driver or OSPM code. The debug version of the code includes the
13720 debug output trace mechanism and has a much larger code and data size.
13722 that these values will vary depending on the efficiency of the compiler
13724 the compiler options used during generation.
13727 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13728 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13730 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13731 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13734 2) iASL Compiler/Disassembler:
13736 Fixed a problem where constants in ASL expressions at the root level (not
13737 within a control method) could be inadvertently truncated during code
13738 generation. This problem was introduced in the 20040715 release.
13741 ----------------------------------------
13742 15 July 2004. Summary of changes for version 20040715:
13744 1) ACPI CA Core Subsystem:
13746 Restructured the internal HW GPE interfaces to pass/track the current
13748 of interrupts (enabled/disabled) in order to avoid possible deadlock and
13749 increase flexibility of the interfaces.
13751 Implemented a "lexicographical compare" for String and Buffer objects
13753 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
13755 as per further clarification to the ACPI specification. Behavior is
13757 to C library "strcmp".
13759 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
13760 external function. In the 32-bit non-debug case, the stack use has been
13761 reduced from 168 bytes to 32 bytes.
13763 Deployed a new run-time configuration flag,
13764 AcpiGbl_EnableInterpreterSlack,
13765 whose purpose is to allow the AML interpreter to forgive certain bad AML
13766 constructs. Default setting is FALSE.
13768 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
13770 support code. If enabled, it allows field access to go beyond the end of
13772 region definition if the field is within the region length rounded up to
13774 next access width boundary (a common coding error.)
13776 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
13777 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
13779 symbols are lowercase by the latest version of the AcpiSrc tool.
13781 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
13782 rename "Register" to simply "Reg" to prevent certain compilers from
13785 Code and Data Size: Current and previous core subsystem library sizes are
13786 shown below. These are the code and data sizes for the acpica.lib
13788 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13789 any ACPI driver or OSPM code. The debug version of the code includes the
13790 debug output trace mechanism and has a much larger code and data size.
13792 that these values will vary depending on the efficiency of the compiler
13794 the compiler options used during generation.
13797 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13798 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13800 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13801 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13804 2) iASL Compiler/Disassembler:
13806 Implemented full support for Package objects within the Case() operator.
13807 Note: The Break() operator is currently not supported within Case blocks
13808 (TermLists) as there is some question about backward compatibility with
13813 Fixed a problem where complex terms were not supported properly within
13817 Eliminated extraneous warning for compiler-emitted reserved names of the
13818 form "_T_x". (Used in Switch/Case operators.)
13820 Eliminated optimization messages for "_T_x" objects and small constants
13821 within the DefinitionBlock operator.
13824 ----------------------------------------
13825 15 June 2004. Summary of changes for version 20040615:
13827 1) ACPI CA Core Subsystem:
13829 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13831 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13834 All directory names in the entire source package are lower case, as they
13835 were in earlier releases.
13837 Implemented "Disassemble" command in the AML debugger that will
13839 a single control method.
13841 Code and Data Size: Current and previous core subsystem library sizes are
13842 shown below. These are the code and data sizes for the acpica.lib
13844 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13845 any ACPI driver or OSPM code. The debug version of the code includes the
13846 debug output trace mechanism and has a much larger code and data size.
13848 that these values will vary depending on the efficiency of the compiler
13850 the compiler options used during generation.
13853 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13854 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13857 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13858 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13861 2) iASL Compiler/Disassembler:
13863 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13865 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13868 All directory names in the entire source package are lower case, as they
13869 were in earlier releases.
13871 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
13874 Fixed an issue with the Windows version of the compiler where later
13876 of Windows place the FADT in the registry under the name "FADT" and not
13877 "FACP" as earlier versions did. This applies when using the -g or -
13878 d<nofilename> options. The compiler now looks for both strings as
13881 Fixed a problem with compiler namepath optimization where a namepath
13883 the Scope() operator could not be optimized if the namepath was a subpath
13885 the current scope path.
13887 ----------------------------------------
13888 27 May 2004. Summary of changes for version 20040527:
13890 1) ACPI CA Core Subsystem:
13892 Completed a new design and implementation for EBDA (Extended BIOS Data
13894 support in the RSDP scan code. The original code improperly scanned for
13896 EBDA by simply scanning from memory location 0 to 0x400. The correct
13898 is to first obtain the EBDA pointer from within the BIOS data area, then
13899 scan 1K of memory starting at the EBDA pointer. There appear to be few
13901 any machines that place the RSDP in the EBDA, however.
13903 Integrated a fix for a possible fault during evaluation of BufferField
13904 arguments. Obsolete code that was causing the problem was removed.
13906 Found and fixed a problem in the Field Support Code where data could be
13907 corrupted on a bit field read that starts on an aligned boundary but does
13908 not end on an aligned boundary. Merged the read/write "datum length"
13909 calculation code into a common procedure.
13911 Rolled in a couple of changes to the FreeBSD-specific header.
13914 Code and Data Size: Current and previous core subsystem library sizes are
13915 shown below. These are the code and data sizes for the acpica.lib
13917 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13918 any ACPI driver or OSPM code. The debug version of the code includes the
13919 debug output trace mechanism and has a much larger code and data size.
13921 that these values will vary depending on the efficiency of the compiler
13923 the compiler options used during generation.
13926 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13927 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13929 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13930 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13933 2) iASL Compiler/Disassembler:
13935 Fixed a generation warning produced by some overly-verbose compilers for
13939 ----------------------------------------
13940 14 May 2004. Summary of changes for version 20040514:
13942 1) ACPI CA Core Subsystem:
13944 Fixed a problem where hardware GPE enable bits sometimes not set properly
13945 during and after GPE method execution. Result of 04/27 changes.
13947 Removed extra "clear all GPEs" when sleeping/waking.
13949 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
13950 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
13952 the new AcpiEv* calls as appropriate.
13954 ACPI_OS_NAME was removed from the OS-specific headers. The default name
13956 now "Microsoft Windows NT" for maximum compatibility. However this can
13958 changed by modifying the acconfig.h file.
13960 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
13961 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
13963 Run _INI methods on ThermalZone objects. This is against the ACPI
13964 specification, but there is apparently ASL code in the field that has
13966 _INI methods, and apparently "other" AML interpreters execute them.
13968 Performed a full 16/32/64 bit lint that resulted in some small changes.
13970 Added a sleep simulation command to the AML debugger to test sleep code.
13972 Code and Data Size: Current and previous core subsystem library sizes are
13973 shown below. These are the code and data sizes for the acpica.lib
13975 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13976 any ACPI driver or OSPM code. The debug version of the code includes the
13977 debug output trace mechanism and has a much larger code and data size.
13979 that these values will vary depending on the efficiency of the compiler
13981 the compiler options used during generation.
13984 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13985 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13987 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13988 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13990 ----------------------------------------
13991 27 April 2004. Summary of changes for version 20040427:
13993 1) ACPI CA Core Subsystem:
13995 Completed a major overhaul of the GPE handling within ACPI CA. There are
13996 now three types of GPEs: wake-only, runtime-only, and combination
13998 The only GPEs allowed to be combination wake/run are for button-style
13999 devices such as a control-method power button, control-method sleep
14001 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
14003 referenced by any _PRW methods are marked for "runtime" and hardware
14004 enabled. Any GPE that is referenced by a _PRW method is marked for
14006 (and disabled at runtime). However, at sleep time, only those GPEs that
14007 have been specifically enabled for wake via the AcpiEnableGpe interface
14009 actually be hardware enabled.
14011 A new external interface has been added, AcpiSetGpeType(), that is meant
14013 be used by device drivers to force a GPE to a particular type. It will
14015 especially useful for the drivers for the button devices mentioned above.
14017 Completed restructuring of the ACPI CA initialization sequence so that
14018 default operation region handlers are installed before GPEs are
14020 and the _PRW methods are executed. This will prevent errors when the
14022 methods attempt to access system memory or I/O space.
14024 GPE enable/disable no longer reads the GPE enable register. We now keep
14026 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
14027 thus no longer depend on the hardware to maintain these bits.
14029 Always clear the wake status and fixed/GPE status bits before sleep, even
14032 Improved the AML debugger output for displaying the GPE blocks and their
14035 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
14039 Fixed a problem where the physical address was incorrectly calculated
14041 the Load() operator was used to directly load from an Operation Region
14043 loading from a Field object.) Also added check for minimum table length
14047 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
14050 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
14051 consistency with the other fields returned.
14053 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
14054 structure for each GPE in the system, so the size of this structure is
14057 CPU stack requirement reduction: Cleaned up the method execution and
14059 evaluation paths so that now a parameter structure is passed, instead of
14060 copying the various method parameters over and over again.
14062 In evregion.c: Correctly exit and reenter the interpreter region if and
14063 only if dispatching an operation region request to a user-installed
14065 Do not exit/reenter when dispatching to a default handler (e.g., default
14066 system memory or I/O handlers)
14069 Notes for updating drivers for the new GPE support. The following
14071 must be made to ACPI-related device drivers that are attached to one or
14073 GPEs: (This information will be added to the ACPI CA Programmer
14076 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
14078 explicitly call AcpiEnableGpe.
14079 2) There is a new interface called AcpiSetGpeType. This should be called
14080 before enabling the GPE. Also, this interface will automatically disable
14081 the GPE if it is currently enabled.
14082 3) AcpiEnableGpe no longer supports a GPE type flag.
14084 Specific drivers that must be changed:
14086 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
14087 AeGpeHandler, NULL);
14088 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
14089 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
14091 2) Button Drivers (Power, Lid, Sleep):
14092 Run _PRW method under parent device
14093 If _PRW exists: /* This is a control-method button */
14094 Extract GPE number and possibly GpeDevice
14095 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
14096 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
14098 For all other devices that have _PRWs, we automatically set the GPE type
14100 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
14102 must be done on a selective basis, usually requiring some kind of user
14104 to allow the user to pick the wake devices.
14107 Code and Data Size: Current and previous core subsystem library sizes are
14108 shown below. These are the code and data sizes for the acpica.lib
14110 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14111 any ACPI driver or OSPM code. The debug version of the code includes the
14112 debug output trace mechanism and has a much larger code and data size.
14114 that these values will vary depending on the efficiency of the compiler
14116 the compiler options used during generation.
14119 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14120 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14123 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14124 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14128 ----------------------------------------
14129 02 April 2004. Summary of changes for version 20040402:
14131 1) ACPI CA Core Subsystem:
14133 Fixed an interpreter problem where an indirect store through an ArgX
14134 parameter was incorrectly applying the "implicit conversion rules" during
14135 the store. From the ACPI specification: "If the target is a method local
14137 argument (LocalX or ArgX), no conversion is performed and the result is
14138 stored directly to the target". The new behavior is to disable implicit
14139 conversion during ALL stores to an ArgX.
14141 Changed the behavior of the _PRW method scan to ignore any and all errors
14142 returned by a given _PRW. This prevents the scan from aborting from the
14143 failure of any single _PRW.
14145 Moved the runtime configuration parameters from the global init procedure
14147 static variables in acglobal.h. This will allow the host to override the
14148 default values easily.
14150 Code and Data Size: Current and previous core subsystem library sizes are
14151 shown below. These are the code and data sizes for the acpica.lib
14153 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14154 any ACPI driver or OSPM code. The debug version of the code includes the
14155 debug output trace mechanism and has a much larger code and data size.
14157 that these values will vary depending on the efficiency of the compiler
14159 the compiler options used during generation.
14162 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14163 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14165 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14166 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14169 2) iASL Compiler/Disassembler:
14171 iASL now fully disassembles SSDTs. However, External() statements are
14173 generated automatically for unresolved symbols at this time. This is a
14174 planned feature for future implementation.
14176 Fixed a scoping problem in the disassembler that occurs when the type of
14178 target of a Scope() operator is overridden. This problem caused an
14179 incorrectly nested internal namespace to be constructed.
14181 Any warnings or errors that are emitted during disassembly are now
14183 out automatically so that the resulting file can be recompiled without
14187 ----------------------------------------
14188 26 March 2004. Summary of changes for version 20040326:
14190 1) ACPI CA Core Subsystem:
14192 Implemented support for "wake" GPEs via interaction between GPEs and the
14193 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
14194 identified as a WAKE GPE and by default will no longer be enabled at
14195 runtime. Previously, we were blindly enabling all GPEs with a
14197 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
14199 believe this has been the cause of thousands of "spurious" GPEs on some
14202 This new GPE behavior is can be reverted to the original behavior (enable
14203 ALL GPEs at runtime) via a runtime flag.
14205 Fixed a problem where aliased control methods could not access objects
14206 properly. The proper scope within the namespace was not initialized
14207 (transferred to the target of the aliased method) before executing the
14210 Fixed a potential race condition on internal object deletion on the
14212 object in AcpiEvaluateObject.
14214 Integrated a fix for resource descriptors where both _MEM and _MTP were
14215 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
14216 wide, 0x0F instead of 0x03.)
14218 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
14221 fault in some cases.
14223 Updated Notify() values for debug statements in evmisc.c
14225 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
14227 Code and Data Size: Current and previous core subsystem library sizes are
14228 shown below. These are the code and data sizes for the acpica.lib
14230 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14231 any ACPI driver or OSPM code. The debug version of the code includes the
14232 debug output trace mechanism and has a much larger code and data size.
14234 that these values will vary depending on the efficiency of the compiler
14236 the compiler options used during generation.
14240 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14241 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14243 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14244 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14246 ----------------------------------------
14247 11 March 2004. Summary of changes for version 20040311:
14249 1) ACPI CA Core Subsystem:
14251 Fixed a problem where errors occurring during the parse phase of control
14252 method execution did not abort cleanly. For example, objects created and
14253 installed in the namespace were not deleted. This caused all subsequent
14254 invocations of the method to return the AE_ALREADY_EXISTS exception.
14256 Implemented a mechanism to force a control method to "Serialized"
14258 if the method attempts to create namespace objects. (The root of the
14259 AE_ALREADY_EXISTS problem.)
14261 Implemented support for the predefined _OSI "internal" control method.
14262 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
14264 "Windows 2001.1", and can be easily upgraded for new strings as
14266 This feature will allow "other" operating systems to execute the fully
14267 tested, "Windows" code path through the ASL code
14269 Global Lock Support: Now allows multiple acquires and releases with any
14270 internal thread. Removed concept of "owning thread" for this special
14273 Fixed two functions that were inappropriately declaring large objects on
14275 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
14277 method execution considerably.
14279 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
14280 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
14282 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
14283 defined on the machine.
14285 Implemented two runtime options: One to force all control method
14287 to "Serialized" to mimic Windows behavior, another to disable _OSI
14289 if it causes problems on a given machine.
14291 Code and Data Size: Current and previous core subsystem library sizes are
14292 shown below. These are the code and data sizes for the acpica.lib
14294 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14295 any ACPI driver or OSPM code. The debug version of the code includes the
14296 debug output trace mechanism and has a much larger code and data size.
14298 that these values will vary depending on the efficiency of the compiler
14300 the compiler options used during generation.
14303 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14304 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14306 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14307 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14309 2) iASL Compiler/Disassembler:
14311 Fixed an array size problem for FreeBSD that would cause the compiler to
14314 ----------------------------------------
14315 20 February 2004. Summary of changes for version 20040220:
14318 1) ACPI CA Core Subsystem:
14320 Implemented execution of _SxD methods for Device objects in the
14321 GetObjectInfo interface.
14323 Fixed calls to _SST method to pass the correct arguments.
14325 Added a call to _SST on wake to restore to "working" state.
14327 Check for End-Of-Buffer failure case in the WalkResources interface.
14329 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
14330 structures to the beginning of the file.
14332 After wake, clear GPE status register(s) before enabling GPEs.
14334 After wake, clear/enable power button. (Perhaps we should clear/enable
14336 fixed events upon wake.)
14338 Fixed a couple of possible memory leaks in the Namespace manager.
14340 Integrated latest acnetbsd.h file.
14342 ----------------------------------------
14343 11 February 2004. Summary of changes for version 20040211:
14346 1) ACPI CA Core Subsystem:
14348 Completed investigation and implementation of the call-by-reference
14349 mechanism for control method arguments.
14351 Fixed a problem where a store of an object into an indexed package could
14352 fail if the store occurs within a different method than the method that
14353 created the package.
14355 Fixed a problem where the ToDecimal operator could return incorrect
14358 Fixed a problem where the CopyObject operator could fail on some of the
14360 obscure objects (e.g., Reference objects.)
14362 Improved the output of the Debug object to display buffer, package, and
14365 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
14367 the expected result.
14369 Added permanent ACPI_REPORT_ERROR macros for all instances of the
14370 ACPI_AML_INTERNAL exception.
14372 Integrated latest version of acfreebsd.h
14374 ----------------------------------------
14375 16 January 2004. Summary of changes for version 20040116:
14377 The purpose of this release is primarily to update the copyright years in
14378 each module, thus causing a huge number of diffs. There are a few small
14379 functional changes, however.
14381 1) ACPI CA Core Subsystem:
14383 Improved error messages when there is a problem finding one or more of
14385 required base ACPI tables
14387 Reintroduced the definition of APIC_HEADER in actbl.h
14389 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
14391 Removed extraneous reference to NewObj in dsmthdat.c
14395 Fixed a problem introduced in December that disabled the correct
14397 of Resource Templates
14400 ----------------------------------------
14401 03 December 2003. Summary of changes for version 20031203:
14403 1) ACPI CA Core Subsystem:
14405 Changed the initialization of Operation Regions during subsystem
14406 init to perform two entire walks of the ACPI namespace; The first
14407 to initialize the regions themselves, the second to execute the
14408 _REG methods. This fixed some interdependencies across _REG
14409 methods found on some machines.
14411 Fixed a problem where a Store(Local0, Local1) could simply update
14412 the object reference count, and not create a new copy of the
14413 object if the Local1 is uninitialized.
14415 Implemented support for the _SST reserved method during sleep
14418 Implemented support to clear the SLP_TYP and SLP_EN bits when
14419 waking up, this is apparently required by some machines.
14421 When sleeping, clear the wake status only if SleepState is not S5.
14423 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
14424 pointer arithmetic advanced a string pointer too far.
14426 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
14427 could be returned if the requested table has not been loaded.
14429 Within the support for IRQ resources, restructured the handling of
14430 the active and edge/level bits.
14432 Fixed a few problems in AcpiPsxExecute() where memory could be
14433 leaked under certain error conditions.
14435 Improved error messages for the cases where the ACPI mode could
14438 Code and Data Size: Current and previous core subsystem library
14439 sizes are shown below. These are the code and data sizes for the
14440 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14441 these values do not include any ACPI driver or OSPM code. The
14442 debug version of the code includes the debug output trace
14443 mechanism and has a much larger code and data size. Note that
14444 these values will vary depending on the efficiency of the compiler
14445 and the compiler options used during generation.
14447 Previous Release (20031029):
14448 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14449 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14451 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14452 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14454 2) iASL Compiler/Disassembler:
14456 Implemented a fix for the iASL disassembler where a bad index was
14457 generated. This was most noticeable on 64-bit platforms
14460 ----------------------------------------
14461 29 October 2003. Summary of changes for version 20031029:
14463 1) ACPI CA Core Subsystem:
14466 Fixed a problem where a level-triggered GPE with an associated
14467 _Lxx control method was incorrectly cleared twice.
14469 Fixed a problem with the Field support code where an access can
14470 occur beyond the end-of-region if the field is non-aligned but
14471 extends to the very end of the parent region (resulted in an
14472 AE_AML_REGION_LIMIT exception.)
14474 Fixed a problem with ACPI Fixed Events where an RT Clock handler
14475 would not get invoked on an RTC event. The RTC event bitmasks for
14476 the PM1 registers were not being initialized properly.
14478 Implemented support for executing _STA and _INI methods for
14479 Processor objects. Although this is currently not part of the
14480 ACPI specification, there is existing ASL code that depends on the
14481 init-time execution of these methods.
14483 Implemented and deployed a GetDescriptorName function to decode
14484 the various types of internal descriptors. Guards against null
14485 descriptors during debug output also.
14487 Implemented and deployed a GetNodeName function to extract the 4-
14488 character namespace node name. This function simplifies the debug
14489 and error output, as well as guarding against null pointers during
14492 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
14493 simplify the debug and error output of 64-bit integers. This
14494 macro replaces the HIDWORD and LODWORD macros for dumping these
14497 Updated the implementation of the Stall() operator to only call
14498 AcpiOsStall(), and also return an error if the operand is larger
14499 than 255. This preserves the required behavior of not
14500 relinquishing the processor, as would happen if AcpiOsSleep() was
14501 called for "long stalls".
14503 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
14504 initialized are now treated as NOOPs.
14506 Cleaned up a handful of warnings during 64-bit generation.
14508 Fixed a reported error where and incorrect GPE number was passed
14509 to the GPE dispatch handler. This value is only used for error
14510 output, however. Used this opportunity to clean up and streamline
14511 the GPE dispatch code.
14513 Code and Data Size: Current and previous core subsystem library
14514 sizes are shown below. These are the code and data sizes for the
14515 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14516 these values do not include any ACPI driver or OSPM code. The
14518 debug version of the code includes the debug output trace
14519 mechanism and has a much larger code and data size. Note that
14520 these values will vary depending on the efficiency of the compiler
14521 and the compiler options used during generation.
14523 Previous Release (20031002):
14524 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14525 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14527 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14528 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14531 2) iASL Compiler/Disassembler:
14533 Updated the iASL compiler to return an error if the operand to the
14534 Stall() operator is larger than 255.
14537 ----------------------------------------
14538 02 October 2003. Summary of changes for version 20031002:
14541 1) ACPI CA Core Subsystem:
14543 Fixed a problem with Index Fields where the index was not
14544 incremented for fields that require multiple writes to the
14545 index/data registers (Fields that are wider than the data
14548 Fixed a problem with all Field objects where a write could go
14549 beyond the end-of-field if the field was larger than the access
14550 granularity and therefore required multiple writes to complete the
14551 request. An extra write beyond the end of the field could happen
14554 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
14555 would incorrectly be returned if the width of the Data Register
14556 was larger than the specified field access width.
14558 Completed fixes for LoadTable() and Unload() and verified their
14559 operation. Implemented full support for the "DdbHandle" object
14560 throughout the ACPI CA subsystem.
14562 Implemented full support for the MADT and ECDT tables in the ACPI
14563 CA header files. Even though these tables are not directly
14564 consumed by ACPI CA, the header definitions are useful for ACPI
14567 Integrated resource descriptor fixes posted to the Linux ACPI
14568 list. This included checks for minimum descriptor length, and
14569 support for trailing NULL strings within descriptors that have
14570 optional string elements.
14572 Code and Data Size: Current and previous core subsystem library
14573 sizes are shown below. These are the code and data sizes for the
14574 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14575 these values do not include any ACPI driver or OSPM code. The
14576 debug version of the code includes the debug output trace
14577 mechanism and has a much larger code and data size. Note that
14578 these values will vary depending on the efficiency of the compiler
14579 and the compiler options used during generation.
14581 Previous Release (20030918):
14582 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14583 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14585 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14586 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14591 Implemented detection of non-ASCII characters within the input
14592 source ASL file. This catches attempts to compile binary (AML)
14593 files early in the compile, with an informative error message.
14595 Fixed a problem where the disassembler would fault if the output
14596 filename could not be generated or if the output file could not be
14599 ----------------------------------------
14600 18 September 2003. Summary of changes for version 20030918:
14603 1) ACPI CA Core Subsystem:
14605 Found and fixed a longstanding problem with the late execution of
14606 the various deferred AML opcodes (such as Operation Regions,
14607 Buffer Fields, Buffers, and Packages). If the name string
14608 specified for the name of the new object placed the object in a
14609 scope other than the current scope, the initialization/execution
14610 of the opcode failed. The solution to this problem was to
14611 implement a mechanism where the late execution of such opcodes
14612 does not attempt to lookup/create the name a second time in an
14613 incorrect scope. This fixes the "region size computed
14614 incorrectly" problem.
14616 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
14617 Global Lock AE_BAD_PARAMETER error.
14619 Fixed several 64-bit issues with prototypes, casting and data
14622 Removed duplicate prototype from acdisasm.h
14624 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
14626 Code and Data Size: Current and previous core subsystem library
14627 sizes are shown below. These are the code and data sizes for the
14628 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14629 these values do not include any ACPI driver or OSPM code. The
14630 debug version of the code includes the debug output trace
14631 mechanism and has a much larger code and data size. Note that
14632 these values will vary depending on the efficiency of the compiler
14633 and the compiler options used during generation.
14637 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14638 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14640 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14641 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14646 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
14647 correct sleep time in seconds.
14649 ----------------------------------------
14650 14 July 2003. Summary of changes for version 20030619:
14652 1) ACPI CA Core Subsystem:
14654 Parse SSDTs in order discovered, as opposed to reverse order
14657 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
14664 Dynamically allocate SDT list (suggested by Andi Kleen)
14666 proc function return value cleanups (Andi Kleen)
14668 Correctly handle NMI watchdog during long stalls (Andrew Morton)
14670 Make it so acpismp=force works (reported by Andrew Morton)
14673 ----------------------------------------
14674 19 June 2003. Summary of changes for version 20030619:
14676 1) ACPI CA Core Subsystem:
14678 Fix To/FromBCD, eliminating the need for an arch-specific #define.
14680 Do not acquire a semaphore in the S5 shutdown path.
14682 Fix ex_digits_needed for 0. (Takayoshi Kochi)
14684 Fix sleep/stall code reversal. (Andi Kleen)
14686 Revert a change having to do with control method calling
14691 acpiphp update (Takayoshi Kochi)
14693 Export acpi_disabled for sonypi (Stelian Pop)
14695 Mention acpismp=force in config help
14697 Re-add acpitable.c and acpismp=force. This improves backwards
14699 compatibility and also cleans up the code to a significant degree.
14701 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
14703 ----------------------------------------
14704 22 May 2003. Summary of changes for version 20030522:
14706 1) ACPI CA Core Subsystem:
14708 Found and fixed a reported problem where an AE_NOT_FOUND error
14709 occurred occasionally during _BST evaluation. This turned out to
14710 be an Owner ID allocation issue where a called method did not get
14711 a new ID assigned to it. Eventually, (after 64k calls), the Owner
14712 ID UINT16 would wraparound so that the ID would be the same as the
14713 caller's and the called method would delete the caller's
14716 Implemented extended error reporting for control methods that are
14717 aborted due to a run-time exception. Output includes the exact
14718 AML instruction that caused the method abort, a dump of the method
14719 locals and arguments at the time of the abort, and a trace of all
14720 nested control method calls.
14722 Modified the interpreter to allow the creation of buffers of zero
14723 length from the AML code. Implemented new code to ensure that no
14724 attempt is made to actually allocate a memory buffer (of length
14725 zero) - instead, a simple buffer object with a NULL buffer pointer
14726 and length zero is created. A warning is no longer issued when
14727 the AML attempts to create a zero-length buffer.
14729 Implemented a workaround for the "leading asterisk issue" in
14730 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
14731 asterisk is automatically removed if present in any HID, UID, or
14732 CID strings. The iASL compiler will still flag this asterisk as
14735 Implemented full support for _CID methods that return a package of
14736 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
14737 now additionally returns a device _CID list if present. This
14738 required a change to the external interface in order to pass an
14739 ACPI_BUFFER object as a parameter since the _CID list is of
14742 Fixed a problem with the new AE_SAME_HANDLER exception where
14743 handler initialization code did not know about this exception.
14745 Code and Data Size: Current and previous core subsystem library
14746 sizes are shown below. These are the code and data sizes for the
14747 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14748 these values do not include any ACPI driver or OSPM code. The
14749 debug version of the code includes the debug output trace
14750 mechanism and has a much larger code and data size. Note that
14751 these values will vary depending on the efficiency of the compiler
14752 and the compiler options used during generation.
14754 Previous Release (20030509):
14755 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14756 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14758 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14759 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14764 Fixed a bug in which we would reinitialize the ACPI interrupt
14765 after it was already working, thus disabling all ACPI and the IRQs
14766 for any other device sharing the interrupt. (Thanks to Stian
14769 Toshiba driver update (John Belmonte)
14771 Return only 0 or 1 for our interrupt handler status (Andrew
14777 Fixed a reported problem where multiple (nested) ElseIf()
14778 statements were not handled correctly by the compiler, resulting
14779 in incorrect warnings and incorrect AML code. This was a problem
14780 in both the ASL parser and the code generator.
14785 Added changes to existing interfaces, new exception codes, and new
14786 text concerning reference count object management versus garbage
14789 ----------------------------------------
14790 09 May 2003. Summary of changes for version 20030509.
14793 1) ACPI CA Core Subsystem:
14795 Changed the subsystem initialization sequence to hold off
14796 installation of address space handlers until the hardware has been
14797 initialized and the system has entered ACPI mode. This is because
14798 the installation of space handlers can cause _REG methods to be
14799 run. Previously, the _REG methods could potentially be run before
14800 ACPI mode was enabled.
14802 Fixed some memory leak issues related to address space handler and
14803 notify handler installation. There were some problems with the
14804 reference count mechanism caused by the fact that the handler
14805 objects are shared across several namespace objects.
14807 Fixed a reported problem where reference counts within the
14808 namespace were not properly updated when named objects created by
14809 method execution were deleted.
14811 Fixed a reported problem where multiple SSDTs caused a deletion
14812 issue during subsystem termination. Restructured the table data
14813 structures to simplify the linked lists and the related code.
14815 Fixed a problem where the table ID associated with secondary
14816 tables (SSDTs) was not being propagated into the namespace objects
14817 created by those tables. This would only present a problem for
14818 tables that are unloaded at run-time, however.
14820 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
14821 type as the length parameter (instead of UINT32).
14823 Solved a long-standing problem where an ALREADY_EXISTS error
14824 appears on various systems. This problem could happen when there
14825 are multiple PCI_Config operation regions under a single PCI root
14826 bus. This doesn't happen very frequently, but there are some
14827 systems that do this in the ASL.
14829 Fixed a reported problem where the internal DeleteNode function
14830 was incorrectly handling the case where a namespace node was the
14831 first in the parent's child list, and had additional peers (not
14832 the only child, but first in the list of children.)
14834 Code and Data Size: Current core subsystem library sizes are shown
14835 below. These are the code and data sizes for the acpica.lib
14836 produced by the Microsoft Visual C++ 6.0 compiler, and these
14837 values do not include any ACPI driver or OSPM code. The debug
14838 version of the code includes the debug output trace mechanism and
14839 has a much larger code and data size. Note that these values will
14840 vary depending on the efficiency of the compiler and the compiler
14841 options used during generation.
14844 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14845 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14847 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14848 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14853 Allow ":" in OS override string (Ducrot Bruno)
14855 Kobject fix (Greg KH)
14858 3 iASL Compiler/Disassembler:
14860 Fixed a problem in the generation of the C source code files (AML
14861 is emitted in C source statements for BIOS inclusion) where the
14862 Ascii dump that appears within a C comment at the end of each line
14863 could cause a compile time error if the AML sequence happens to
14864 have an open comment or close comment sequence embedded.
14867 ----------------------------------------
14868 24 April 2003. Summary of changes for version 20030424.
14871 1) ACPI CA Core Subsystem:
14873 Support for big-endian systems has been implemented. Most of the
14874 support has been invisibly added behind big-endian versions of the
14875 ACPI_MOVE_* macros.
14877 Fixed a problem in AcpiHwDisableGpeBlock() and
14878 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
14879 low level hardware write routine. The offset parameter was
14880 actually eliminated from the low level read/write routines because
14881 they had become obsolete.
14883 Fixed a problem where a handler object was deleted twice during
14884 the removal of a fixed event handler.
14889 A fix for SMP systems with link devices was contributed by
14893 (2.5) Return whether we handled the interrupt in our IRQ handler.
14894 (Linux ISRs no longer return void, so we can propagate the handler
14895 return value from the ACPI CA core back to the OS.)
14901 The ACPI CA Programmer Reference has been updated to reflect new
14902 interfaces and changes to existing interfaces.
14904 ----------------------------------------
14905 28 March 2003. Summary of changes for version 20030328.
14907 1) ACPI CA Core Subsystem:
14909 The GPE Block Device support has been completed. New interfaces
14910 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
14911 interfaces (enable, disable, clear, getstatus) have been split
14912 into separate interfaces for Fixed Events and General Purpose
14913 Events (GPEs) in order to support GPE Block Devices properly.
14915 Fixed a problem where the error message "Failed to acquire
14916 semaphore" would appear during operations on the embedded
14919 Code and Data Size: Current core subsystem library sizes are shown
14920 below. These are the code and data sizes for the acpica.lib
14921 produced by the Microsoft Visual C++ 6.0 compiler, and these
14922 values do not include any ACPI driver or OSPM code. The debug
14923 version of the code includes the debug output trace mechanism and
14924 has a much larger code and data size. Note that these values will
14925 vary depending on the efficiency of the compiler and the compiler
14926 options used during generation.
14929 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14930 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14932 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14933 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14936 ----------------------------------------
14937 28 February 2003. Summary of changes for version 20030228.
14940 1) ACPI CA Core Subsystem:
14942 The GPE handling and dispatch code has been completely overhauled
14943 in preparation for support of GPE Block Devices (ID ACPI0006).
14944 This affects internal data structures and code only; there should
14945 be no differences visible externally. One new file has been
14948 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
14949 fields that are used to determine the GPE block lengths. The
14950 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
14951 structures are ignored. This is per the ACPI specification but it
14952 isn't very clear. The full 256 Block 0/1 GPEs are now supported
14953 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
14955 In the SCI interrupt handler, removed the read of the PM1_CONTROL
14956 register to look at the SCI_EN bit. On some machines, this read
14957 causes an SMI event and greatly slows down SCI events. (This may
14958 in fact be the cause of slow battery status response on some
14961 Fixed a problem where a store of a NULL string to a package object
14962 could cause the premature deletion of the object. This was seen
14963 during execution of the battery _BIF method on some systems,
14964 resulting in no battery data being returned.
14966 Added AcpiWalkResources interface to simplify parsing of resource
14969 Code and Data Size: Current core subsystem library sizes are shown
14970 below. These are the code and data sizes for the acpica.lib
14971 produced by the Microsoft Visual C++ 6.0 compiler, and these
14972 values do not include any ACPI driver or OSPM code. The debug
14973 version of the code includes the debug output trace mechanism and
14974 has a much larger code and data size. Note that these values will
14975 vary depending on the efficiency of the compiler and the compiler
14976 options used during generation.
14979 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14980 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14982 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14983 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14988 S3 fixes (Ole Rohne)
14990 Update ACPI PHP driver with to use new acpi_walk_resource API
14993 Add S4BIOS support (Pavel Machek)
14995 Map in entire table before performing checksum (John Stultz)
14997 Expand the mem= cmdline to allow the specification of reserved and
14998 ACPI DATA blocks (Pavel Machek)
15000 Never use ACPI on VISWS
15002 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
15004 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
15005 causing us to think that some systems support C2 when they really
15008 Do not count processor objects for non-present CPUs (Thanks to
15014 Fixed a problem where ASL include files could not be found and
15017 Added support for the _PDC reserved name.
15020 ----------------------------------------
15021 22 January 2003. Summary of changes for version 20030122.
15024 1) ACPI CA Core Subsystem:
15026 Added a check for constructs of the form: Store (Local0, Local0)
15027 where Local0 is not initialized. Apparently, some BIOS
15028 programmers believe that this is a NOOP. Since this store doesn't
15029 do anything anyway, the new prototype behavior will ignore this
15030 error. This is a case where we can relax the strict checking in
15031 the interpreter in the name of compatibility.
15036 The AcpiSrc Source Conversion Utility has been released with the
15037 Linux package for the first time. This is the utility that is
15038 used to convert the ACPI CA base source code to the Linux version.
15040 (Both) Handle P_BLK lengths shorter than 6 more gracefully
15042 (Both) Move more headers to include/acpi, and delete an unused
15045 (Both) Move drivers/acpi/include directory to include/acpi
15047 (Both) Boot functions don't use cmdline, so don't pass it around
15049 (Both) Remove include of unused header (Adrian Bunk)
15051 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
15053 former now also includes the latter, acpiphp.h only needs the one,
15056 (2.5) Make it possible to select method of bios restoring after S3
15057 resume. [=> no more ugly ifdefs] (Pavel Machek)
15059 (2.5) Make proc write interfaces work (Pavel Machek)
15061 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
15063 (2.5) Break out ACPI Perf code into its own module, under cpufreq
15064 (Dominik Brodowski)
15066 (2.4) S4BIOS support (Ducrot Bruno)
15068 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
15074 Added support to disassemble SSDT and PSDTs.
15076 Implemented support to obtain SSDTs from the Windows registry if
15080 ----------------------------------------
15081 09 January 2003. Summary of changes for version 20030109.
15083 1) ACPI CA Core Subsystem:
15085 Changed the behavior of the internal Buffer-to-String conversion
15086 function. The current ACPI specification states that the contents
15087 of the buffer are "converted to a string of two-character
15088 hexadecimal numbers, each separated by a space". Unfortunately,
15089 this definition is not backwards compatible with existing ACPI 1.0
15090 implementations (although the behavior was not defined in the ACPI
15091 1.0 specification). The new behavior simply copies data from the
15092 buffer to the string until a null character is found or the end of
15093 the buffer is reached. The new String object is always null
15094 terminated. This problem was seen during the generation of _BIF
15095 battery data where incorrect strings were returned for battery
15096 type, etc. This will also require an errata to the ACPI
15099 Renamed all instances of NATIVE_UINT and NATIVE_INT to
15100 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
15102 Copyright in all module headers (both Linux and non-Linux) has be
15105 Code and Data Size: Current core subsystem library sizes are shown
15106 below. These are the code and data sizes for the acpica.lib
15107 produced by the Microsoft Visual C++ 6.0 compiler, and these
15108 values do not include any ACPI driver or OSPM code. The debug
15109 version of the code includes the debug output trace mechanism and
15110 has a much larger code and data size. Note that these values will
15111 vary depending on the efficiency of the compiler and the compiler
15112 options used during generation.
15115 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15116 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15118 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15119 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15124 Fixed an oops on module insertion/removal (Matthew Tippett)
15126 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
15128 (2.5) Replace pr_debug (Randy Dunlap)
15130 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
15132 (Both) Eliminate spawning of thread from timer callback, in favor
15135 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
15137 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
15139 (Both) Add missing statics to button.c (Pavel Machek)
15141 Several changes have been made to the source code translation
15142 utility that generates the Linux Code in order to make the code
15145 All typedefs on structs and unions have been removed in keeping
15146 with the Linux coding style.
15148 Removed the non-Linux SourceSafe module revision number from each
15151 Completed major overhaul of symbols to be lowercase for linux.
15152 Doubled the number of symbols that are lowercase.
15154 Fixed a problem where identifiers within procedure headers and
15155 within quotes were not fully lower cased (they were left with a
15158 Some C macros whose only purpose is to allow the generation of 16-
15159 bit code are now completely removed in the Linux code, increasing
15160 readability and maintainability.
15162 ----------------------------------------
15164 12 December 2002. Summary of changes for version 20021212.
15167 1) ACPI CA Core Subsystem:
15169 Fixed a problem where the creation of a zero-length AML Buffer
15170 would cause a fault.
15172 Fixed a problem where a Buffer object that pointed to a static AML
15173 buffer (in an ACPI table) could inadvertently be deleted, causing
15176 Fixed a problem where a user buffer (passed in to the external
15177 ACPI CA interfaces) could be overwritten if the buffer was too
15178 small to complete the operation, causing memory corruption.
15180 Fixed a problem in the Buffer-to-String conversion code where a
15181 string of length one was always returned, regardless of the size
15182 of the input Buffer object.
15184 Removed the NATIVE_CHAR data type across the entire source due to
15185 lack of need and lack of consistent use.
15187 Code and Data Size: Current core subsystem library sizes are shown
15188 below. These are the code and data sizes for the acpica.lib
15189 produced by the Microsoft Visual C++ 6.0 compiler, and these
15190 values do not include any ACPI driver or OSPM code. The debug
15191 version of the code includes the debug output trace mechanism and
15192 has a much larger code and data size. Note that these values will
15193 vary depending on the efficiency of the compiler and the compiler
15194 options used during generation.
15197 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15198 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15200 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15201 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15204 ----------------------------------------
15205 05 December 2002. Summary of changes for version 20021205.
15207 1) ACPI CA Core Subsystem:
15209 Fixed a problem where a store to a String or Buffer object could
15210 cause corruption of the DSDT if the object type being stored was
15211 the same as the target object type and the length of the object
15212 being stored was equal to or smaller than the original (existing)
15213 target object. This was seen to cause corruption of battery _BIF
15214 buffers if the _BIF method modified the buffer on the fly.
15216 Fixed a problem where an internal error was generated if a control
15217 method invocation was used in an OperationRegion, Buffer, or
15218 Package declaration. This was caused by the deferred parsing of
15219 the control method and thus the deferred creation of the internal
15220 method object. The solution to this problem was to create the
15221 internal method object at the moment the method is encountered in
15222 the first pass - so that subsequent references to the method will
15223 able to obtain the required parameter count and thus properly
15224 parse the method invocation. This problem presented itself as an
15225 AE_AML_INTERNAL during the pass 1 parse phase during table load.
15227 Fixed a problem where the internal String object copy routine did
15228 not always allocate sufficient memory for the target String object
15229 and caused memory corruption. This problem was seen to cause
15230 "Allocation already present in list!" errors as memory allocation
15233 Implemented a new function for the evaluation of namespace objects
15234 that allows the specification of the allowable return object
15235 types. This simplifies a lot of code that checks for a return
15236 object of one or more specific objects returned from the
15237 evaluation (such as _STA, etc.) This may become and external
15238 function if it would be useful to ACPI-related drivers.
15240 Completed another round of prefixing #defines with "ACPI_" for
15243 Completed additional code restructuring to allow more modular
15244 linking for iASL compiler and AcpiExec. Several files were split
15245 creating new files. New files: nsparse.c dsinit.c evgpe.c
15247 Implemented an abort mechanism to terminate an executing control
15248 method via the AML debugger. This feature is useful for debugging
15249 control methods that depend (wait) for specific hardware
15252 Code and Data Size: Current core subsystem library sizes are shown
15253 below. These are the code and data sizes for the acpica.lib
15254 produced by the Microsoft Visual C++ 6.0 compiler, and these
15255 values do not include any ACPI driver or OSPM code. The debug
15256 version of the code includes the debug output trace mechanism and
15257 has a much larger code and data size. Note that these values will
15258 vary depending on the efficiency of the compiler and the compiler
15259 options used during generation.
15262 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15263 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15265 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15266 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15269 2) iASL Compiler/Disassembler
15271 Fixed a compiler code generation problem for "Interrupt" Resource
15272 Descriptors. If specified in the ASL, the optional "Resource
15273 Source Index" and "Resource Source" fields were not inserted into
15274 the correct location within the AML resource descriptor, creating
15275 an invalid descriptor.
15277 Fixed a disassembler problem for "Interrupt" resource descriptors.
15278 The optional "Resource Source Index" and "Resource Source" fields
15282 ----------------------------------------
15283 22 November 2002. Summary of changes for version 20021122.
15286 1) ACPI CA Core Subsystem:
15288 Fixed a reported problem where an object stored to a Method Local
15289 or Arg was not copied to a new object during the store - the
15290 object pointer was simply copied to the Local/Arg. This caused
15291 all subsequent operations on the Local/Arg to also affect the
15292 original source of the store operation.
15294 Fixed a problem where a store operation to a Method Local or Arg
15295 was not completed properly if the Local/Arg contained a reference
15296 (from RefOf) to a named field. The general-purpose store-to-
15297 namespace-node code is now used so that this case is handled
15300 Fixed a problem where the internal object copy routine would cause
15301 a protection fault if the object being copied was a Package and
15302 contained either 1) a NULL package element or 2) a nested sub-
15305 Fixed a problem with the GPE initialization that resulted from an
15306 ambiguity in the ACPI specification. One section of the
15307 specification states that both the address and length of the GPE
15308 block must be zero if the block is not supported. Another section
15309 implies that only the address need be zero if the block is not
15310 supported. The code has been changed so that both the address and
15311 the length must be non-zero to indicate a valid GPE block (i.e.,
15312 if either the address or the length is zero, the GPE block is
15315 Code and Data Size: Current core subsystem library sizes are shown
15316 below. These are the code and data sizes for the acpica.lib
15317 produced by the Microsoft Visual C++ 6.0 compiler, and these
15318 values do not include any ACPI driver or OSPM code. The debug
15319 version of the code includes the debug output trace mechanism and
15320 has a much larger code and data size. Note that these values will
15321 vary depending on the efficiency of the compiler and the compiler
15322 options used during generation.
15325 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15326 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15328 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15329 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15334 Cleaned up EC driver. Exported an external EC read/write
15335 interface. By going through this, other drivers (most notably
15336 sonypi) will be able to serialize access to the EC.
15339 3) iASL Compiler/Disassembler
15341 Implemented support to optionally generate include files for both
15342 ASM and C (the -i switch). This simplifies BIOS development by
15343 automatically creating include files that contain external
15344 declarations for the symbols that are created within the
15346 (optionally generated) ASM and C AML source files.
15349 ----------------------------------------
15350 15 November 2002. Summary of changes for version 20021115.
15352 1) ACPI CA Core Subsystem:
15354 Fixed a memory leak problem where an error during resolution of
15356 method arguments during a method invocation from another method
15357 failed to cleanup properly by deleting all successfully resolved
15360 Fixed a problem where the target of the Index() operator was not
15361 correctly constructed if the source object was a package. This
15362 problem has not been detected because the use of a target operand
15363 with Index() is very rare.
15365 Fixed a problem with the Index() operator where an attempt was
15366 made to delete the operand objects twice.
15368 Fixed a problem where an attempt was made to delete an operand
15369 twice during execution of the CondRefOf() operator if the target
15372 Implemented the first of perhaps several internal create object
15373 functions that create and initialize a specific object type. This
15374 consolidates duplicated code wherever the object is created, thus
15375 shrinking the size of the subsystem.
15377 Implemented improved debug/error messages for errors that occur
15378 during nested method invocations. All executing method pathnames
15379 are displayed (with the error) as the call stack is unwound - thus
15382 Fixed a problem introduced in the 10/02 release that caused
15383 premature deletion of a buffer object if a buffer was used as an
15384 ASL operand where an integer operand is required (Thus causing an
15385 implicit object conversion from Buffer to Integer.) The change in
15386 the 10/02 release was attempting to fix a memory leak (albeit
15389 Code and Data Size: Current core subsystem library sizes are shown
15390 below. These are the code and data sizes for the acpica.lib
15391 produced by the Microsoft Visual C++ 6.0 compiler, and these
15392 values do not include any ACPI driver or OSPM code. The debug
15393 version of the code includes the debug output trace mechanism and
15394 has a much larger code and data size. Note that these values will
15395 vary depending on the efficiency of the compiler and the compiler
15396 options used during generation.
15399 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15400 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15402 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15403 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15408 Changed the implementation of the ACPI semaphores to use down()
15409 instead of down_interruptable(). It is important that the
15410 execution of ACPI control methods not be interrupted by signals.
15411 Methods must run to completion, or the system may be left in an
15412 unknown/unstable state.
15414 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
15418 3) iASL Compiler/Disassembler
15421 Changed the default location of output files. All output files
15422 are now placed in the current directory by default instead of in
15423 the directory of the source file. This change may affect some
15424 existing makefiles, but it brings the behavior of the compiler in
15425 line with other similar tools. The location of the output files
15426 can be overridden with the -p command line switch.
15429 ----------------------------------------
15430 11 November 2002. Summary of changes for version 20021111.
15433 0) ACPI Specification 2.0B is released and is now available at:
15434 http://www.acpi.info/index.html
15437 1) ACPI CA Core Subsystem:
15439 Implemented support for the ACPI 2.0 SMBus Operation Regions.
15440 This includes the early detection and handoff of the request to
15441 the SMBus region handler (avoiding all of the complex field
15442 support code), and support for the bidirectional return packet
15443 from an SMBus write operation. This paves the way for the
15444 development of SMBus drivers in each host operating system.
15446 Fixed a problem where the semaphore WAIT_FOREVER constant was
15447 defined as 32 bits, but must be 16 bits according to the ACPI
15448 specification. This had the side effect of causing ASL
15449 Mutex/Event timeouts even though the ASL code requested a wait
15450 forever. Changed all internal references to the ACPI timeout
15451 parameter to 16 bits to prevent future problems. Changed the name
15452 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
15454 Code and Data Size: Current core subsystem library sizes are shown
15455 below. These are the code and data sizes for the acpica.lib
15456 produced by the Microsoft Visual C++ 6.0 compiler, and these
15457 values do not include any ACPI driver or OSPM code. The debug
15458 version of the code includes the debug output trace mechanism and
15459 has a much larger code and data size. Note that these values will
15460 vary depending on the efficiency of the compiler and the compiler
15461 options used during generation.
15464 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15465 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15467 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15468 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15473 Module loading/unloading fixes (John Cagle)
15476 3) iASL Compiler/Disassembler
15478 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
15480 Implemented support for the disassembly of all SMBus protocol
15481 keywords (SMBQuick, SMBWord, etc.)
15483 ----------------------------------------
15484 01 November 2002. Summary of changes for version 20021101.
15487 1) ACPI CA Core Subsystem:
15489 Fixed a problem where platforms that have a GPE1 block but no GPE0
15490 block were not handled correctly. This resulted in a "GPE
15491 overlap" error message. GPE0 is no longer required.
15493 Removed code added in the previous release that inserted nodes
15494 into the namespace in alphabetical order. This caused some side-
15495 effects on various machines. The root cause of the problem is
15496 still under investigation since in theory, the internal ordering
15497 of the namespace nodes should not matter.
15500 Enhanced error reporting for the case where a named object is not
15501 found during control method execution. The full ACPI namepath
15502 (name reference) of the object that was not found is displayed in
15505 Note: as a result of the overhaul of the namespace object types in
15506 the previous release, the namespace nodes for the predefined
15507 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
15508 instead of ACPI_TYPE_ANY. This simplifies the namespace
15509 management code but may affect code that walks the namespace tree
15510 looking for specific object types.
15512 Code and Data Size: Current core subsystem library sizes are shown
15513 below. These are the code and data sizes for the acpica.lib
15514 produced by the Microsoft Visual C++ 6.0 compiler, and these
15515 values do not include any ACPI driver or OSPM code. The debug
15516 version of the code includes the debug output trace mechanism and
15517 has a much larger code and data size. Note that these values will
15518 vary depending on the efficiency of the compiler and the compiler
15519 options used during generation.
15522 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15523 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15525 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15526 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15531 Fixed a problem introduced in the previous release where the
15532 Processor and Thermal objects were not recognized and installed in
15533 /proc. This was related to the scope type change described above.
15536 3) iASL Compiler/Disassembler
15538 Implemented the -g option to get all of the required ACPI tables
15539 from the registry and save them to files (Windows version of the
15540 compiler only.) The required tables are the FADT, FACS, and DSDT.
15542 Added ACPI table checksum validation during table disassembly in
15543 order to catch corrupted tables.
15546 ----------------------------------------
15547 22 October 2002. Summary of changes for version 20021022.
15549 1) ACPI CA Core Subsystem:
15551 Implemented a restriction on the Scope operator that the target
15552 must already exist in the namespace at the time the operator is
15553 encountered (during table load or method execution). In other
15554 words, forward references are not allowed and Scope() cannot
15555 create a new object. This changes the previous behavior where the
15556 interpreter would create the name if not found. This new behavior
15557 correctly enables the search-to-root algorithm during namespace
15558 lookup of the target name. Because of this upsearch, this fixes
15559 the known Compaq _SB_.OKEC problem and makes both the AML
15560 interpreter and iASL compiler compatible with other ACPI
15563 Completed a major overhaul of the internal ACPI object types for
15564 the ACPI Namespace and the associated operand objects. Many of
15565 these types had become obsolete with the introduction of the two-
15566 pass namespace load. This cleanup simplifies the code and makes
15567 the entire namespace load mechanism much clearer and easier to
15570 Improved debug output for tracking scope opening/closing to help
15571 diagnose scoping issues. The old scope name as well as the new
15572 scope name are displayed. Also improved error messages for
15573 problems with ASL Mutex objects and error messages for GPE
15576 Cleaned up the namespace dump code, removed obsolete code.
15578 All string output (for all namespace/object dumps) now uses the
15579 common ACPI string output procedure which handles escapes properly
15580 and does not emit non-printable characters.
15582 Fixed some issues with constants in the 64-bit version of the
15583 local C library (utclib.c)
15588 EC Driver: No longer attempts to acquire the Global Lock at
15592 3) iASL Compiler/Disassembler
15594 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
15595 2 opcodes outside of a control method. This means that the
15596 "executable" operators (versus the "namespace" operators) cannot
15597 be used at the table level; they can only be used within a control
15600 Implemented the restriction on the Scope() operator where the
15601 target must already exist in the namespace at the time the
15602 operator is encountered (during ASL compilation). In other words,
15603 forward references are not allowed and Scope() cannot create a new
15604 object. This makes the iASL compiler compatible with other ACPI
15605 implementations and makes the Scope() implementation adhere to the
15606 ACPI specification.
15608 Fixed a problem where namepath optimization for the Alias operator
15609 was optimizing the wrong path (of the two namepaths.) This caused
15610 a "Missing alias link" error message.
15612 Fixed a problem where an "unknown reserved name" warning could be
15613 incorrectly generated for names like "_SB" when the trailing
15614 underscore is not used in the original ASL.
15616 Fixed a problem where the reserved name check did not handle
15617 NamePaths with multiple NameSegs correctly. The first nameseg of
15618 the NamePath was examined instead of the last NameSeg.
15621 ----------------------------------------
15623 02 October 2002. Summary of changes for this release.
15626 1) ACPI CA Core Subsystem version 20021002:
15628 Fixed a problem where a store/copy of a string to an existing
15629 string did not always set the string length properly in the String
15632 Fixed a reported problem with the ToString operator where the
15633 behavior was identical to the ToHexString operator instead of just
15634 simply converting a raw buffer to a string data type.
15636 Fixed a problem where CopyObject and the other "explicit"
15637 conversion operators were not updating the internal namespace node
15638 type as part of the store operation.
15640 Fixed a memory leak during implicit source operand conversion
15641 where the original object was not deleted if it was converted to a
15642 new object of a different type.
15644 Enhanced error messages for all problems associated with namespace
15645 lookups. Common procedure generates and prints the lookup name as
15646 well as the formatted status.
15648 Completed implementation of a new design for the Alias support
15649 within the namespace. The existing design did not handle the case
15650 where a new object was assigned to one of the two names due to the
15651 use of an explicit conversion operator, resulting in the two names
15652 pointing to two different objects. The new design simply points
15653 the Alias name to the original name node - not to the object.
15654 This results in a level of indirection that must be handled in the
15655 name resolution mechanism.
15657 Code and Data Size: Current core subsystem library sizes are shown
15658 below. These are the code and data sizes for the acpica.lib
15659 produced by the Microsoft Visual C++ 6.0 compiler, and these
15660 values do not include any ACPI driver or OSPM code. The debug
15661 version of the code includes the debug output trace mechanism and
15662 has a larger code and data size. Note that these values will vary
15663 depending on the efficiency of the compiler and the compiler
15664 options used during generation.
15667 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15668 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15670 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15671 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15676 Initialize thermal driver's timer before it is used. (Knut
15679 Allow handling negative celsius values. (Kochi Takayoshi)
15681 Fix thermal management and make trip points. R/W (Pavel Machek)
15683 Fix /proc/acpi/sleep. (P. Christeas)
15685 IA64 fixes. (David Mosberger)
15687 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
15689 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
15693 3) iASL Compiler/Disassembler
15695 Clarified some warning/error messages.
15698 ----------------------------------------
15699 18 September 2002. Summary of changes for this release.
15702 1) ACPI CA Core Subsystem version 20020918:
15704 Fixed a reported problem with reference chaining (via the Index()
15705 and RefOf() operators) in the ObjectType() and SizeOf() operators.
15706 The definition of these operators includes the dereferencing of
15707 all chained references to return information on the base object.
15709 Fixed a problem with stores to indexed package elements - the
15710 existing code would not complete the store if an "implicit
15711 conversion" was not performed. In other words, if the existing
15712 object (package element) was to be replaced completely, the code
15713 didn't handle this case.
15715 Relaxed typechecking on the ASL "Scope" operator to allow the
15716 target name to refer to an object of type Integer, String, or
15717 Buffer, in addition to the scoping object types (Device,
15718 predefined Scopes, Processor, PowerResource, and ThermalZone.)
15719 This allows existing AML code that has workarounds for a bug in
15720 Windows to function properly. A warning is issued, however. This
15721 affects both the AML interpreter and the iASL compiler. Below is
15722 an example of this type of ASL code:
15728 Fixed some reported problems with 64-bit integer support in the
15729 local implementation of C library functions (clib.c)
15734 Use ACPI fix map region instead of IOAPIC region, since it is
15735 undefined in non-SMP.
15737 Ensure that the SCI has the proper polarity and trigger, even on
15738 systems that do not have an interrupt override entry in the MADT.
15740 2.5 big driver reorganization (Pat Mochel)
15742 Use early table mapping code from acpitable.c (Andi Kleen)
15744 New blacklist entries (Andi Kleen)
15746 Blacklist improvements. Split blacklist code out into a separate
15747 file. Move checking the blacklist to very early. Previously, we
15748 would use ACPI tables, and then halfway through init, check the
15749 blacklist -- too late. Now, it's early enough to completely fall-
15753 3) iASL Compiler/Disassembler version 20020918:
15755 Fixed a problem where the typechecking code didn't know that an
15756 alias could point to a method. In other words, aliases were not
15757 being dereferenced during typechecking.
15760 ----------------------------------------
15761 29 August 2002. Summary of changes for this release.
15763 1) ACPI CA Core Subsystem Version 20020829:
15765 If the target of a Scope() operator already exists, it must be an
15766 object type that actually opens a scope -- such as a Device,
15767 Method, Scope, etc. This is a fatal runtime error. Similar error
15768 check has been added to the iASL compiler also.
15770 Tightened up the namespace load to disallow multiple names in the
15771 same scope. This previously was allowed if both objects were of
15772 the same type. (i.e., a lookup was the same as entering a new
15778 Ensure that the ACPI interrupt has the proper trigger and
15781 local_irq_disable is extraneous. (Matthew Wilcox)
15783 Make "acpi=off" actually do what it says, and not use the ACPI
15784 interpreter *or* the tables.
15786 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
15790 3) iASL Compiler/Disassembler Version 20020829:
15792 Implemented namepath optimization for name declarations. For
15793 example, a declaration like "Method (\_SB_.ABCD)" would get
15794 optimized to "Method (ABCD)" if the declaration is within the
15795 \_SB_ scope. This optimization is in addition to the named
15796 reference path optimization first released in the previous
15797 version. This would seem to complete all possible optimizations
15798 for namepaths within the ASL/AML.
15800 If the target of a Scope() operator already exists, it must be an
15801 object type that actually opens a scope -- such as a Device,
15802 Method, Scope, etc.
15804 Implemented a check and warning for unreachable code in the same
15805 block below a Return() statement.
15807 Fixed a problem where the listing file was not generated if the
15808 compiler aborted if the maximum error count was exceeded (200).
15810 Fixed a problem where the typechecking of method return values was
15811 broken. This includes the check for a return value when the
15812 method is invoked as a TermArg (a return value is expected.)
15814 Fixed a reported problem where EOF conditions during a quoted
15815 string or comment caused a fault.
15818 ----------------------------------------
15819 15 August 2002. Summary of changes for this release.
15821 1) ACPI CA Core Subsystem Version 20020815:
15823 Fixed a reported problem where a Store to a method argument that
15824 contains a reference did not perform the indirect store correctly.
15825 This problem was created during the conversion to the new
15826 reference object model - the indirect store to a method argument
15827 code was not updated to reflect the new model.
15829 Reworked the ACPI mode change code to better conform to ACPI 2.0,
15830 handle corner cases, and improve code legibility (Kochi Takayoshi)
15832 Fixed a problem with the pathname parsing for the carat (^)
15833 prefix. The heavy use of the carat operator by the new namepath
15834 optimization in the iASL compiler uncovered a problem with the AML
15835 interpreter handling of this prefix. In the case where one or
15836 more carats precede a single nameseg, the nameseg was treated as
15837 standalone and the search rule (to root) was inadvertently
15838 applied. This could cause both the iASL compiler and the
15839 interpreter to find the wrong object or to miss the error that
15840 should occur if the object does not exist at that exact pathname.
15842 Found and fixed the problem where the HP Pavilion DSDT would not
15843 load. This was a relatively minor tweak to the table loading code
15844 (a problem caused by the unexpected encounter with a method
15845 invocation not within a control method), but it does not solve the
15846 overall issue of the execution of AML code at the table level.
15847 This investigation is still ongoing.
15849 Code and Data Size: Current core subsystem library sizes are shown
15850 below. These are the code and data sizes for the acpica.lib
15851 produced by the Microsoft Visual C++ 6.0 compiler, and these
15852 values do not include any ACPI driver or OSPM code. The debug
15853 version of the code includes the debug output trace mechanism and
15854 has a larger code and data size. Note that these values will vary
15855 depending on the efficiency of the compiler and the compiler
15856 options used during generation.
15859 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15860 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15862 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15863 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15868 Remove redundant slab.h include (Brad Hards)
15870 Fix several bugs in thermal.c (Herbert Nachtnebel)
15872 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
15874 Change acpi_system_suspend to use updated irq functions (Pavel
15877 Export acpi_get_firmware_table (Matthew Wilcox)
15879 Use proper root proc entry for ACPI (Kochi Takayoshi)
15881 Fix early-boot table parsing (Bjorn Helgaas)
15884 3) iASL Compiler/Disassembler
15886 Reworked the compiler options to make them more consistent and to
15887 use two-letter options where appropriate. We were running out of
15888 sensible letters. This may break some makefiles, so check the
15889 current options list by invoking the compiler with no parameters.
15891 Completed the design and implementation of the ASL namepath
15892 optimization option for the compiler. This option optimizes all
15893 references to named objects to the shortest possible path. The
15894 first attempt tries to utilize a single nameseg (4 characters) and
15895 the "search-to-root" algorithm used by the interpreter. If that
15896 cannot be used (because either the name is not in the search path
15897 or there is a conflict with another object with the same name),
15898 the pathname is optimized using the carat prefix (usually a
15899 shorter string than specifying the entire path from the root.)
15901 Implemented support to obtain the DSDT from the Windows registry
15902 (when the disassembly option is specified with no input file).
15903 Added this code as the implementation for AcpiOsTableOverride in
15904 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
15905 utility) to scan memory for the DSDT to the AcpiOsTableOverride
15906 function in the DOS OSL to make the disassembler truly OS
15909 Implemented a new option to disassemble and compile in one step.
15910 When used without an input filename, this option will grab the
15911 DSDT from the local machine, disassemble it, and compile it in one
15914 Added a warning message for invalid escapes (a backslash followed
15915 by any character other than the allowable escapes). This catches
15916 the quoted string error "\_SB_" (which should be "\\_SB_" ).
15918 Also, there are numerous instances in the ACPI specification where
15921 Added a compiler option to disable all optimizations. This is
15922 basically the "compatibility mode" because by using this option,
15923 the AML code will come out exactly the same as other ASL
15926 Added error messages for incorrectly ordered dependent resource
15927 functions. This includes: missing EndDependentFn macro at end of
15928 dependent resource list, nested dependent function macros (both
15929 start and end), and missing StartDependentFn macro. These are
15930 common errors that should be caught at compile time.
15932 Implemented _OSI support for the disassembler and compiler. _OSI
15933 must be included in the namespace for proper disassembly (because
15934 the disassembler must know the number of arguments.)
15936 Added an "optimization" message type that is optional (off by
15937 default). This message is used for all optimizations - including
15938 constant folding, integer optimization, and namepath optimization.
15940 ----------------------------------------
15941 25 July 2002. Summary of changes for this release.
15944 1) ACPI CA Core Subsystem Version 20020725:
15946 The AML Disassembler has been enhanced to produce compilable ASL
15947 code and has been integrated into the iASL compiler (see below) as
15948 well as the single-step disassembly for the AML debugger and the
15949 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
15950 resource templates and macros are fully supported. The
15951 disassembler has been tested on over 30 different AML files,
15952 producing identical AML when the resulting disassembled ASL file
15953 is recompiled with the same ASL compiler.
15955 Modified the Resource Manager to allow zero interrupts and zero
15956 dma channels during the GetCurrentResources call. This was
15957 causing problems on some platforms.
15959 Added the AcpiOsRedirectOutput interface to the OSL to simplify
15960 output redirection for the AcpiOsPrintf and AcpiOsVprintf
15963 Code and Data Size: Current core subsystem library sizes are shown
15964 below. These are the code and data sizes for the acpica.lib
15965 produced by the Microsoft Visual C++ 6.0 compiler, and these
15966 values do not include any ACPI driver or OSPM code. The debug
15967 version of the code includes the debug output trace mechanism and
15968 has a larger code and data size. Note that these values will vary
15969 depending on the efficiency of the compiler and the compiler
15970 options used during generation.
15973 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15974 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15976 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15977 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15982 Fixed a panic in the EC driver (Dominik Brodowski)
15984 Implemented checksum of the R/XSDT itself during Linux table scan
15990 The AML disassembler is integrated into the compiler. The "-d"
15991 option invokes the disassembler to completely disassemble an
15992 input AML file, producing as output a text ASL file with the
15993 extension ".dsl" (to avoid name collisions with existing .asl
15994 source files.) A future enhancement will allow the disassembler
15995 to obtain the BIOS DSDT from the registry under Windows.
15997 Fixed a problem with the VendorShort and VendorLong resource
15998 descriptors where an invalid AML sequence was created.
16000 Implemented a fix for BufferData term in the ASL parser. It was
16001 inadvertently defined twice, allowing invalid syntax to pass and
16002 causing reduction conflicts.
16004 Fixed a problem where the Ones opcode could get converted to a
16005 value of zero if "Ones" was used where a byte, word or dword value
16006 was expected. The 64-bit value is now truncated to the correct
16007 size with the correct value.
16011 ----------------------------------------
16012 02 July 2002. Summary of changes for this release.
16015 1) ACPI CA Core Subsystem Version 20020702:
16017 The Table Manager code has been restructured to add several new
16018 features. Tables that are not required by the core subsystem
16019 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
16020 validated in any way and are returned from AcpiGetFirmwareTable if
16021 requested. The AcpiOsTableOverride interface is now called for
16022 each table that is loaded by the subsystem in order to allow the
16023 host to override any table it chooses. Previously, only the DSDT
16024 could be overridden. Added one new files, tbrsdt.c and
16027 Fixed a problem with the conversion of internal package objects to
16028 external objects (when a package is returned from a control
16029 method.) The return buffer length was set to zero instead of the
16030 proper length of the package object.
16032 Fixed a reported problem with the use of the RefOf and DeRefOf
16033 operators when passing reference arguments to control methods. A
16034 new type of Reference object is used internally for references
16035 produced by the RefOf operator.
16037 Added additional error messages in the Resource Manager to explain
16038 AE_BAD_DATA errors when they occur during resource parsing.
16040 Split the AcpiEnableSubsystem into two primitives to enable a
16041 finer granularity initialization sequence. These two calls should
16042 be called in this order: AcpiEnableSubsystem (flags),
16043 AcpiInitializeObjects (flags). The flags parameter remains the
16049 Updated the ACPI utilities module to understand the new style of
16050 fully resolved package objects that are now returned from the core
16051 subsystem. This eliminates errors of the form:
16053 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
16054 acpi_utils-0430 [145] acpi_evaluate_reference:
16055 Invalid element in package (not a device reference)
16057 The method evaluation utility uses the new buffer allocation
16058 scheme instead of calling AcpiEvaluate Object twice.
16060 Added support for ECDT. This allows the use of the Embedded
16062 Controller before the namespace has been fully initialized, which
16063 is necessary for ACPI 2.0 support, and for some laptops to
16064 initialize properly. (Laptops using ECDT are still rare, so only
16065 limited testing was performed of the added functionality.)
16067 Fixed memory leaks in the EC driver.
16069 Eliminated a brittle code structure in acpi_bus_init().
16071 Eliminated the acpi_evaluate() helper function in utils.c. It is
16072 no longer needed since acpi_evaluate_object can optionally
16073 allocate memory for the return object.
16075 Implemented fix for keyboard hang when getting battery readings on
16076 some systems (Stephen White)
16078 PCI IRQ routing update (Dominik Brodowski)
16080 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
16083 ----------------------------------------
16084 11 June 2002. Summary of changes for this release.
16087 1) ACPI CA Core Subsystem Version 20020611:
16089 Fixed a reported problem where constants such as Zero and One
16090 appearing within _PRT packages were not handled correctly within
16091 the resource manager code. Originally reported against the ASL
16092 compiler because the code generator now optimizes integers to
16093 their minimal AML representation (i.e. AML constants if possible.)
16094 The _PRT code now handles all AML constant opcodes correctly
16095 (Zero, One, Ones, Revision).
16097 Fixed a problem with the Concatenate operator in the AML
16098 interpreter where a buffer result object was incorrectly marked as
16099 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
16101 All package sub-objects are now fully resolved before they are
16102 returned from the external ACPI interfaces. This means that name
16103 strings are resolved to object handles, and constant operators
16104 (Zero, One, Ones, Revision) are resolved to Integers.
16106 Implemented immediate resolution of the AML Constant opcodes
16107 (Zero, One, Ones, Revision) to Integer objects upon detection
16108 within the AML stream. This has simplified and reduced the
16109 generated code size of the subsystem by eliminating about 10
16110 switch statements for these constants (which previously were
16111 contained in Reference objects.) The complicating issues are that
16112 the Zero opcode is used as a "placeholder" for unspecified
16113 optional target operands and stores to constants are defined to be
16116 Code and Data Size: Current core subsystem library sizes are shown
16117 below. These are the code and data sizes for the acpica.lib
16118 produced by the Microsoft Visual C++ 6.0 compiler, and these
16119 values do not include any ACPI driver or OSPM code. The debug
16120 version of the code includes the debug output trace mechanism and
16121 has a larger code and data size. Note that these values will vary
16122 depending on the efficiency of the compiler and the compiler
16123 options used during generation.
16126 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16127 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16129 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16130 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16136 Added preliminary support for obtaining _TRA data for PCI root
16137 bridges (Bjorn Helgaas).
16140 3) iASL Compiler Version X2046:
16142 Fixed a problem where the "_DDN" reserved name was defined to be a
16143 control method with one argument. There are no arguments, and
16144 _DDN does not have to be a control method.
16146 Fixed a problem with the Linux version of the compiler where the
16147 source lines printed with error messages were the wrong lines.
16148 This turned out to be the "LF versus CR/LF" difference between
16149 Windows and Unix. This appears to be the longstanding issue
16150 concerning listing output and error messages.
16152 Fixed a problem with the Linux version of compiler where opcode
16153 names within error messages were wrong. This was caused by a
16154 slight difference in the output of the Flex tool on Linux versus
16157 Fixed a problem with the Linux compiler where the hex output files
16158 contained some garbage data caused by an internal buffer overrun.
16161 ----------------------------------------
16162 17 May 2002. Summary of changes for this release.
16165 1) ACPI CA Core Subsystem Version 20020517:
16167 Implemented a workaround to an BIOS bug discovered on the HP
16168 OmniBook where the FADT revision number and the table size are
16169 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
16170 behavior is to fallback to using only the ACPI 1.0 fields of the
16171 FADT if the table is too small to be a ACPI 2.0 table as claimed
16172 by the revision number. Although this is a BIOS bug, this is a
16173 case where the workaround is simple enough and with no side
16174 effects, so it seemed prudent to add it. A warning message is
16177 Implemented minimum size checks for the fixed-length ACPI tables -
16178 - the FADT and FACS, as well as consistency checks between the
16179 revision number and the table size.
16181 Fixed a reported problem in the table override support where the
16182 new table pointer was incorrectly treated as a physical address
16183 instead of a logical address.
16185 Eliminated the use of the AE_AML_ERROR exception and replaced it
16186 with more descriptive codes.
16188 Fixed a problem where an exception would occur if an ASL Field was
16189 defined with no named Field Units underneath it (used by some
16192 Code and Data Size: Current core subsystem library sizes are shown
16193 below. These are the code and data sizes for the acpica.lib
16194 produced by the Microsoft Visual C++ 6.0 compiler, and these
16195 values do not include any ACPI driver or OSPM code. The debug
16196 version of the code includes the debug output trace mechanism and
16197 has a larger code and data size. Note that these values will vary
16198 depending on the efficiency of the compiler and the compiler
16199 options used during generation.
16202 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16203 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16205 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16206 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16212 Much work done on ACPI init (MADT and PCI IRQ routing support).
16213 (Paul D. and Dominik Brodowski)
16215 Fix PCI IRQ-related panic on boot (Sam Revitch)
16217 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
16219 Fix "MHz" typo (Dominik Brodowski)
16221 Fix RTC year 2000 issue (Dominik Brodowski)
16223 Preclude multiple button proc entries (Eric Brunet)
16225 Moved arch-specific code out of include/platform/aclinux.h
16227 3) iASL Compiler Version X2044:
16229 Implemented error checking for the string used in the EISAID macro
16230 (Usually used in the definition of the _HID object.) The code now
16231 strictly enforces the PnP format - exactly 7 characters, 3
16232 uppercase letters and 4 hex digits.
16234 If a raw string is used in the definition of the _HID object
16235 (instead of the EISAID macro), the string must contain all
16236 alphanumeric characters (e.g., "*PNP0011" is not allowed because
16239 Implemented checking for invalid use of ACPI reserved names for
16240 most of the name creation operators (Name, Device, Event, Mutex,
16241 OperationRegion, PowerResource, Processor, and ThermalZone.)
16242 Previously, this check was only performed for control methods.
16244 Implemented an additional check on the Name operator to emit an
16245 error if a reserved name that must be implemented in ASL as a
16246 control method is used. We know that a reserved name must be a
16247 method if it is defined with input arguments.
16249 The warning emitted when a namespace object reference is not found
16250 during the cross reference phase has been changed into an error.
16251 The "External" directive should be used for names defined in other
16255 4) Tools and Utilities
16257 The 16-bit tools (adump16 and aexec16) have been regenerated and
16260 Fixed a problem with the output of both acpidump and adump16 where
16261 the indentation of closing parentheses and brackets was not
16263 aligned properly with the parent block.
16266 ----------------------------------------
16267 03 May 2002. Summary of changes for this release.
16270 1) ACPI CA Core Subsystem Version 20020503:
16272 Added support a new OSL interface that allows the host operating
16274 system software to override the DSDT found in the firmware -
16275 AcpiOsTableOverride. With this interface, the OSL can examine the
16276 version of the firmware DSDT and replace it with a different one
16279 Added new external interfaces for accessing ACPI registers from
16280 device drivers and other system software - AcpiGetRegister and
16281 AcpiSetRegister. This was simply an externalization of the
16282 existing AcpiHwBitRegister interfaces.
16284 Fixed a regression introduced in the previous build where the
16285 ASL/AML CreateField operator always returned an error,
16286 "destination must be a NS Node".
16288 Extended the maximum time (before failure) to successfully enable
16289 ACPI mode to 3 seconds.
16291 Code and Data Size: Current core subsystem library sizes are shown
16292 below. These are the code and data sizes for the acpica.lib
16293 produced by the Microsoft Visual C++ 6.0 compiler, and these
16294 values do not include any ACPI driver or OSPM code. The debug
16295 version of the code includes the debug output trace mechanism and
16296 has a larger code and data size. Note that these values will vary
16297 depending on the efficiency of the compiler and the compiler
16298 options used during generation.
16301 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16302 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16304 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16305 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16310 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
16311 free. While 3 out of 4 of our in-house systems work fine, the last
16312 one still hangs when testing the LAPIC timer.
16314 Renamed many files in 2.5 kernel release to omit "acpi_" from the
16317 Added warning on boot for Presario 711FR.
16319 Sleep improvements (Pavel Machek)
16321 ACPI can now be built without CONFIG_PCI enabled.
16323 IA64: Fixed memory map functions (JI Lee)
16326 3) iASL Compiler Version X2043:
16328 Added support to allow the compiler to be integrated into the MS
16329 VC++ development environment for one-button compilation of single
16330 files or entire projects -- with error-to-source-line mapping.
16332 Implemented support for compile-time constant folding for the
16333 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
16334 specification. This allows the ASL writer to use expressions
16335 instead of Integer/Buffer/String constants in terms that must
16336 evaluate to constants at compile time and will also simplify the
16337 emitted AML in any such sub-expressions that can be folded
16338 (evaluated at compile-time.) This increases the size of the
16339 compiler significantly because a portion of the ACPI CA AML
16340 interpreter is included within the compiler in order to pre-
16341 evaluate constant expressions.
16344 Fixed a problem with the "Unicode" ASL macro that caused the
16345 compiler to fault. (This macro is used in conjunction with the
16346 _STR reserved name.)
16348 Implemented an AML opcode optimization to use the Zero, One, and
16349 Ones opcodes where possible to further reduce the size of integer
16350 constants and thus reduce the overall size of the generated AML
16353 Implemented error checking for new reserved terms for ACPI version
16356 Implemented the -qr option to display the current list of ACPI
16357 reserved names known to the compiler.
16359 Implemented the -qc option to display the current list of ASL
16360 operators that are allowed within constant expressions and can
16361 therefore be folded at compile time if the operands are constants.
16366 Updated the Programmer's Reference for new interfaces, data types,
16367 and memory allocation model options.
16369 Updated the iASL Compiler User Reference to apply new format and
16370 add information about new features and options.
16372 ----------------------------------------
16373 19 April 2002. Summary of changes for this release.
16375 1) ACPI CA Core Subsystem Version 20020419:
16377 The source code base for the Core Subsystem has been completely
16378 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
16379 versions. The Lint option files used are included in the
16380 /acpi/generate/lint directory.
16382 Implemented enhanced status/error checking across the entire
16383 Hardware manager subsystem. Any hardware errors (reported from
16384 the OSL) are now bubbled up and will abort a running control
16388 Fixed a problem where the per-ACPI-table integer width (32 or 64)
16389 was stored only with control method nodes, causing a fault when
16390 non-control method code was executed during table loading. The
16391 solution implemented uses a global variable to indicate table
16392 width across the entire ACPI subsystem. Therefore, ACPI CA does
16393 not support mixed integer widths across different ACPI tables
16396 Fixed a problem where NULL extended fields (X fields) in an ACPI
16397 2.0 ACPI FADT caused the table load to fail. Although the
16398 existing ACPI specification is a bit fuzzy on this topic, the new
16399 behavior is to fall back on a ACPI 1.0 field if the corresponding
16400 ACPI 2.0 X field is zero (even though the table revision indicates
16401 a full ACPI 2.0 table.) The ACPI specification will be updated to
16402 clarify this issue.
16404 Fixed a problem with the SystemMemory operation region handler
16405 where memory was always accessed byte-wise even if the AML-
16406 specified access width was larger than a byte. This caused
16407 problems on systems with memory-mapped I/O. Memory is now
16408 accessed with the width specified. On systems that do not support
16409 non-aligned transfers, a check is made to guarantee proper address
16410 alignment before proceeding in order to avoid an AML-caused
16411 alignment fault within the kernel.
16414 Fixed a problem with the ExtendedIrq resource where only one byte
16415 of the 4-byte Irq field was extracted.
16417 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
16418 function was out of date and required a rewrite.
16420 Code and Data Size: Current core subsystem library sizes are shown
16421 below. These are the code and data sizes for the acpica.lib
16422 produced by the Microsoft Visual C++ 6.0 compiler, and these
16423 values do not include any ACPI driver or OSPM code. The debug
16424 version of the code includes the debug output trace mechanism and
16425 has a larger code and data size. Note that these values will vary
16426 depending on the efficiency of the compiler and the compiler
16427 options used during generation.
16430 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16431 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16433 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16434 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16439 PCI IRQ routing fixes (Dominik Brodowski)
16442 3) iASL Compiler Version X2042:
16444 Implemented an additional compile-time error check for a field
16445 unit whose size + minimum access width would cause a run-time
16446 access beyond the end-of-region. Previously, only the field size
16447 itself was checked.
16449 The Core subsystem and iASL compiler now share a common parse
16450 object in preparation for compile-time evaluation of the type
16451 3/4/5 ASL operators.
16454 ----------------------------------------
16455 Summary of changes for this release: 03_29_02
16457 1) ACPI CA Core Subsystem Version 20020329:
16459 Implemented support for late evaluation of TermArg operands to
16460 Buffer and Package objects. This allows complex expressions to be
16461 used in the declarations of these object types.
16463 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
16464 1.0, if the field was larger than 32 bits, it was returned as a
16465 buffer - otherwise it was returned as an integer. In ACPI 2.0,
16466 the field is returned as a buffer only if the field is larger than
16467 64 bits. The TableRevision is now considered when making this
16468 conversion to avoid incompatibility with existing ASL code.
16470 Implemented logical addressing for AcpiOsGetRootPointer. This
16471 allows an RSDP with either a logical or physical address. With
16472 this support, the host OS can now override all ACPI tables with
16473 one logical RSDP. Includes implementation of "typed" pointer
16474 support to allow a common data type for both physical and logical
16475 pointers internally. This required a change to the
16476 AcpiOsGetRootPointer interface.
16478 Implemented the use of ACPI 2.0 Generic Address Structures for all
16479 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
16480 mapped I/O for these ACPI features.
16482 Initialization now ignores not only non-required tables (All
16483 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
16484 not validate the table headers of unrecognized tables.
16486 Fixed a problem where a notify handler could only be
16487 installed/removed on an object of type Device. All "notify"
16489 objects are now supported -- Devices, Processor, Power, and
16492 Removed most verbosity from the ACPI_DB_INFO debug level. Only
16493 critical information is returned when this debug level is enabled.
16495 Code and Data Size: Current core subsystem library sizes are shown
16496 below. These are the code and data sizes for the acpica.lib
16497 produced by the Microsoft Visual C++ 6.0 compiler, and these
16498 values do not include any ACPI driver or OSPM code. The debug
16499 version of the code includes the debug output trace mechanism and
16500 has a larger code and data size. Note that these values will vary
16501 depending on the efficiency of the compiler and the compiler
16502 options used during generation.
16505 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16506 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16508 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16509 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16514 The processor driver (acpi_processor.c) now fully supports ACPI
16515 2.0-based processor performance control (e.g. Intel(R)
16516 SpeedStep(TM) technology) Note that older laptops that only have
16517 the Intel "applet" interface are not supported through this. The
16518 'limit' and 'performance' interface (/proc) are fully functional.
16519 [Note that basic policy for controlling performance state
16520 transitions will be included in the next version of ospmd.] The
16521 idle handler was modified to more aggressively use C2, and PIIX4
16522 errata handling underwent a complete overhaul (big thanks to
16523 Dominik Brodowski).
16525 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
16526 based devices in the ACPI namespace are now dynamically bound
16527 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
16528 This allows, among other things, ACPI to resolve bus numbers for
16529 subordinate PCI bridges.
16531 Enhanced PCI IRQ routing to get the proper bus number for _PRT
16532 entries defined underneath PCI bridges.
16534 Added IBM 600E to bad bios list due to invalid _ADR value for
16535 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
16537 In the process of adding full MADT support (e.g. IOAPIC) for IA32
16538 (acpi.c, mpparse.c) -- stay tuned.
16540 Added back visual differentiation between fixed-feature and
16541 control-method buttons in dmesg. Buttons are also subtyped (e.g.
16542 button/power/PWRF) to simplify button identification.
16544 We no longer use -Wno-unused when compiling debug. Please ignore
16545 any "_THIS_MODULE defined but not used" messages.
16547 Can now shut down the system using "magic sysrq" key.
16550 3) iASL Compiler version 2041:
16552 Fixed a problem where conversion errors for hex/octal/decimal
16553 constants were not reported.
16555 Implemented a fix for the General Register template Address field.
16556 This field was 8 bits when it should be 64.
16558 Fixed a problem where errors/warnings were no longer being emitted
16559 within the listing output file.
16561 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
16562 exactly 4 characters, alphanumeric only.
16567 ----------------------------------------
16568 Summary of changes for this release: 03_08_02
16571 1) ACPI CA Core Subsystem Version 20020308:
16573 Fixed a problem with AML Fields where the use of the "AccessAny"
16574 keyword could cause an interpreter error due to attempting to read
16575 or write beyond the end of the parent Operation Region.
16577 Fixed a problem in the SystemMemory Operation Region handler where
16578 an attempt was made to map memory beyond the end of the region.
16579 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
16580 errors on some Linux systems.
16582 Fixed a problem where the interpreter/namespace "search to root"
16583 algorithm was not functioning for some object types. Relaxed the
16584 internal restriction on the search to allow upsearches for all
16585 external object types as well as most internal types.
16590 We now use safe_halt() macro versus individual calls to sti | hlt.
16592 Writing to the processor limit interface should now work. "echo 1"
16593 will increase the limit, 2 will decrease, and 0 will reset to the
16600 Fixed segfault on Linux version.
16603 ----------------------------------------
16604 Summary of changes for this release: 02_25_02
16606 1) ACPI CA Core Subsystem:
16609 Fixed a problem where the GPE bit masks were not initialized
16610 properly, causing erratic GPE behavior.
16612 Implemented limited support for multiple calling conventions. The
16613 code can be generated with either the VPL (variable parameter
16614 list, or "C") convention, or the FPL (fixed parameter list, or
16615 "Pascal") convention. The core subsystem is about 3.4% smaller
16616 when generated with FPL.
16621 Re-add some /proc/acpi/event functionality that was lost during
16624 Resolved issue with /proc events for fixed-feature buttons showing
16625 up as the system device.
16627 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
16629 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
16631 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
16633 Fixed limit interface & usage to fix bugs with passive cooling
16636 Restructured PRT support.
16639 ----------------------------------------
16640 Summary of changes for this label: 02_14_02
16643 1) ACPI CA Core Subsystem:
16645 Implemented support in AcpiLoadTable to allow loading of FACS and
16648 Support for the now-obsolete interim 0.71 64-bit ACPI tables has
16649 been removed. All 64-bit platforms should be migrated to the ACPI
16650 2.0 tables. The actbl71.h header has been removed from the source
16653 All C macros defined within the subsystem have been prefixed with
16654 "ACPI_" to avoid collision with other system include files.
16656 Removed the return value for the two AcpiOsPrint interfaces, since
16657 it is never used and causes lint warnings for ignoring the return
16660 Added error checking to all internal mutex acquire and release
16661 calls. Although a failure from one of these interfaces is
16662 probably a fatal system error, these checks will cause the
16663 immediate abort of the currently executing method or interface.
16665 Fixed a problem where the AcpiSetCurrentResources interface could
16666 fault. This was a side effect of the deployment of the new memory
16669 Fixed a couple of problems with the Global Lock support introduced
16670 in the last major build. The "common" (1.0/2.0) internal FACS was
16671 being overwritten with the FACS signature and clobbering the
16672 Global Lock pointer. Also, the actual firmware FACS was being
16673 unmapped after construction of the "common" FACS, preventing
16674 access to the actual Global Lock field within it. The "common"
16675 internal FACS is no longer installed as an actual ACPI table; it
16676 is used simply as a global.
16678 Code and Data Size: Current core subsystem library sizes are shown
16679 below. These are the code and data sizes for the acpica.lib
16680 produced by the Microsoft Visual C++ 6.0 compiler, and these
16681 values do not include any ACPI driver or OSPM code. The debug
16682 version of the code includes the debug output trace mechanism and
16683 has a larger code and data size. Note that these values will vary
16684 depending on the efficiency of the compiler and the compiler
16685 options used during generation.
16687 Previous Release (02_07_01)
16688 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16689 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16691 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16692 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16697 Updated Linux-specific code for core macro and OSL interface
16698 changes described above.
16700 Improved /proc/acpi/event. It now can be opened only once and has
16701 proper poll functionality.
16703 Fixed and restructured power management (acpi_bus).
16705 Only create /proc "view by type" when devices of that class exist.
16707 Fixed "charging/discharging" bug (and others) in acpi_battery.
16709 Improved thermal zone code.
16712 3) ASL Compiler, version X2039:
16715 Implemented the new compiler restriction on ASL String hex/octal
16716 escapes to non-null, ASCII values. An error results if an invalid
16717 value is used. (This will require an ACPI 2.0 specification
16720 AML object labels that are output to the optional C and ASM source
16721 are now prefixed with both the ACPI table signature and table ID
16722 to help guarantee uniqueness within a large BIOS project.
16725 ----------------------------------------
16726 Summary of changes for this label: 02_01_02
16728 1) ACPI CA Core Subsystem:
16730 ACPI 2.0 support is complete in the entire Core Subsystem and the
16731 ASL compiler. All new ACPI 2.0 operators are implemented and all
16732 other changes for ACPI 2.0 support are complete. With
16733 simultaneous code and data optimizations throughout the subsystem,
16734 ACPI 2.0 support has been implemented with almost no additional
16735 cost in terms of code and data size.
16737 Implemented a new mechanism for allocation of return buffers. If
16738 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
16739 be allocated on behalf of the caller. Consolidated all return
16740 buffer validation and allocation to a common procedure. Return
16741 buffers will be allocated via the primary OSL allocation interface
16742 since it appears that a separate pool is not needed by most users.
16743 If a separate pool is required for these buffers, the caller can
16744 still use the original mechanism and pre-allocate the buffer(s).
16746 Implemented support for string operands within the DerefOf
16749 Restructured the Hardware and Event managers to be table driven,
16750 simplifying the source code and reducing the amount of generated
16753 Split the common read/write low-level ACPI register bitfield
16754 procedure into a separate read and write, simplifying the code
16757 Obsoleted the AcpiOsCallocate OSL interface. This interface was
16758 used only a handful of times and didn't have enough critical mass
16759 for a separate interface. Replaced with a common calloc procedure
16762 Fixed a reported problem with the GPE number mapping mechanism
16763 that allows GPE1 numbers to be non-contiguous with GPE0.
16764 Reorganized the GPE information and shrunk a large array that was
16765 originally large enough to hold info for all possible GPEs (256)
16766 to simply large enough to hold all GPEs up to the largest GPE
16767 number on the machine.
16769 Fixed a reported problem with resource structure alignment on 64-
16772 Changed the AcpiEnableEvent and AcpiDisableEvent external
16773 interfaces to not require any flags for the common case of
16774 enabling/disabling a GPE.
16776 Implemented support to allow a "Notify" on a Processor object.
16778 Most TBDs in comments within the source code have been resolved
16782 Fixed a problem in the interpreter where a standalone parent
16783 prefix (^) was not handled correctly in the interpreter and
16786 Removed obsolete and unnecessary GPE save/restore code.
16788 Implemented Field support in the ASL Load operator. This allows a
16789 table to be loaded from a named field, in addition to loading a
16790 table directly from an Operation Region.
16792 Implemented timeout and handle support in the external Global Lock
16795 Fixed a problem in the AcpiDump utility where pathnames were no
16796 longer being generated correctly during the dump of named objects.
16798 Modified the AML debugger to give a full display of if/while
16799 predicates instead of just one AML opcode at a time. (The
16800 predicate can have several nested ASL statements.) The old method
16801 was confusing during single stepping.
16803 Code and Data Size: Current core subsystem library sizes are shown
16804 below. These are the code and data sizes for the acpica.lib
16805 produced by the Microsoft Visual C++ 6.0 compiler, and these
16806 values do not include any ACPI driver or OSPM code. The debug
16807 version of the code includes the debug output trace mechanism and
16808 has a larger code and data size. Note that these values will vary
16809 depending on the efficiency of the compiler and the compiler
16810 options used during generation.
16812 Previous Release (12_18_01)
16813 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16814 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16816 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16817 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16821 Implemented fix for PIIX reverse throttling errata (Processor
16824 Added new Limit interface (Processor and Thermal drivers)
16826 New thermal policy (Thermal driver)
16828 Many updates to /proc
16830 Battery "low" event support (Battery driver)
16832 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
16834 IA32 - IA64 initialization unification, no longer experimental
16836 Menuconfig options redesigned
16838 3) ASL Compiler, version X2037:
16840 Implemented several new output features to simplify integration of
16841 AML code into firmware: 1) Output the AML in C source code with
16842 labels for each named ASL object. The original ASL source code
16843 is interleaved as C comments. 2) Output the AML in ASM source code
16844 with labels and interleaved ASL source. 3) Output the AML in
16845 raw hex table form, in either C or ASM.
16847 Implemented support for optional string parameters to the
16848 LoadTable operator.
16850 Completed support for embedded escape sequences within string
16851 literals. The compiler now supports all single character escapes
16852 as well as the Octal and Hex escapes. Note: the insertion of a
16853 null byte into a string literal (via the hex/octal escape) causes
16854 the string to be immediately terminated. A warning is issued.
16856 Fixed a problem where incorrect AML was generated for the case
16857 where an ASL namepath consists of a single parent prefix (
16859 ) with no trailing name segments.
16861 The compiler has been successfully generated with a 64-bit C
16867 ----------------------------------------
16868 Summary of changes for this label: 12_18_01
16872 Enhanced blacklist with reason and severity fields. Any table's
16873 signature may now be used to identify a blacklisted system.
16875 Call _PIC control method to inform the firmware which interrupt
16876 model the OS is using. Turn on any disabled link devices.
16878 Cleaned up busmgr /proc error handling (Andreas Dilger)
16880 2) ACPI CA Core Subsystem:
16882 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
16885 Completed implementation of the ACPI 2.0 "Continue",
16886 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
16887 operators. All new ACPI 2.0 operators are now implemented in both
16888 the ASL compiler and the AML interpreter. The only remaining ACPI
16889 2.0 task is support for the String data type in the DerefOf
16890 operator. Fixed a problem with AcquireMutex where the status code
16891 was lost if the caller had to actually wait for the mutex.
16893 Increased the maximum ASL Field size from 64K bits to 4G bits.
16895 Completed implementation of the external Global Lock interfaces --
16896 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
16897 Handler parameters were added.
16899 Completed another pass at removing warnings and issues when
16900 compiling with 64-bit compilers. The code now compiles cleanly
16901 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
16902 add and subtract (diff) macros have changed considerably.
16905 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
16906 64-bit platforms, 32-bits on all others. This type is used
16907 wherever memory allocation and/or the C sizeof() operator is used,
16908 and affects the OSL memory allocation interfaces AcpiOsAllocate
16909 and AcpiOsCallocate.
16911 Implemented sticky user breakpoints in the AML debugger.
16913 Code and Data Size: Current core subsystem library sizes are shown
16914 below. These are the code and data sizes for the acpica.lib
16915 produced by the Microsoft Visual C++ 6.0 compiler, and these
16916 values do not include any ACPI driver or OSPM code. The debug
16917 version of the code includes the debug output trace mechanism and
16918 has a larger code and data size. Note that these values will vary
16919 depending on the efficiency of the compiler and the compiler
16920 options used during generation.
16922 Previous Release (12_05_01)
16923 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16924 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16926 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16927 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16929 3) ASL Compiler, version X2034:
16931 Now checks for (and generates an error if detected) the use of a
16932 Break or Continue statement without an enclosing While statement.
16935 Successfully generated the compiler with the Intel 64-bit C
16938 ----------------------------------------
16939 Summary of changes for this label: 12_05_01
16941 1) ACPI CA Core Subsystem:
16943 The ACPI 2.0 CopyObject operator is fully implemented. This
16944 operator creates a new copy of an object (and is also used to
16945 bypass the "implicit conversion" mechanism of the Store operator.)
16947 The ACPI 2.0 semantics for the SizeOf operator are fully
16948 implemented. The change is that performing a SizeOf on a
16949 reference object causes an automatic dereference of the object to
16950 tha actual value before the size is evaluated. This behavior was
16951 undefined in ACPI 1.0.
16953 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
16954 have been implemented. The interrupt polarity and mode are now
16957 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
16958 appearing in Package objects were not properly converted to
16959 integers when the internal Package was converted to an external
16960 object (via the AcpiEvaluateObject interface.)
16962 Fixed a problem with the namespace object deletion mechanism for
16963 objects created by control methods. There were two parts to this
16964 problem: 1) Objects created during the initialization phase method
16965 parse were not being deleted, and 2) The object owner ID mechanism
16966 to track objects was broken.
16968 Fixed a problem where the use of the ASL Scope operator within a
16969 control method would result in an invalid opcode exception.
16971 Fixed a problem introduced in the previous label where the buffer
16972 length required for the _PRT structure was not being returned
16975 Code and Data Size: Current core subsystem library sizes are shown
16976 below. These are the code and data sizes for the acpica.lib
16977 produced by the Microsoft Visual C++ 6.0 compiler, and these
16978 values do not include any ACPI driver or OSPM code. The debug
16979 version of the code includes the debug output trace mechanism and
16980 has a larger code and data size. Note that these values will vary
16981 depending on the efficiency of the compiler and the compiler
16982 options used during generation.
16984 Previous Release (11_20_01)
16985 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16986 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16989 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16990 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16994 Updated all files to apply cleanly against 2.4.16.
16996 Added basic PCI Interrupt Routing Table (PRT) support for IA32
16997 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
16998 version supports both static and dynamic PRT entries, but dynamic
16999 entries are treated as if they were static (not yet
17000 reconfigurable). Architecture- specific code to use this data is
17001 absent on IA32 but should be available shortly.
17003 Changed the initialization sequence to start the ACPI interpreter
17004 (acpi_init) prior to initialization of the PCI driver (pci_init)
17005 in init/main.c. This ordering is required to support PRT and
17006 facilitate other (future) enhancement. A side effect is that the
17007 ACPI bus driver and certain device drivers can no longer be loaded
17010 Modified the 'make menuconfig' options to allow PCI Interrupt
17011 Routing support to be included without the ACPI Bus and other
17014 3) ASL Compiler, version X2033:
17016 Fixed some issues with the use of the new CopyObject and
17017 DataTableRegion operators. Both are fully functional.
17019 ----------------------------------------
17020 Summary of changes for this label: 11_20_01
17022 20 November 2001. Summary of changes for this release.
17024 1) ACPI CA Core Subsystem:
17026 Updated Index support to match ACPI 2.0 semantics. Storing a
17027 Integer, String, or Buffer to an Index of a Buffer will store only
17028 the least-significant byte of the source to the Indexed buffer
17029 byte. Multiple writes are not performed.
17031 Fixed a problem where the access type used in an AccessAs ASL
17032 operator was not recorded correctly into the field object.
17034 Fixed a problem where ASL Event objects were created in a
17035 signalled state. Events are now created in an unsignalled state.
17037 The internal object cache is now purged after table loading and
17038 initialization to reduce the use of dynamic kernel memory -- on
17039 the assumption that object use is greatest during the parse phase
17040 of the entire table (versus the run-time use of individual control
17043 ACPI 2.0 variable-length packages are now fully operational.
17045 Code and Data Size: Code and Data optimizations have permitted new
17046 feature development with an actual reduction in the library size.
17047 Current core subsystem library sizes are shown below. These are
17048 the code and data sizes for the acpica.lib produced by the
17049 Microsoft Visual C++ 6.0 compiler, and these values do not include
17050 any ACPI driver or OSPM code. The debug version of the code
17051 includes the debug output trace mechanism and has a larger code
17052 and data size. Note that these values will vary depending on the
17053 efficiency of the compiler and the compiler options used during
17056 Previous Release (11_09_01):
17057 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17058 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17061 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17062 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17066 Enhanced the ACPI boot-time initialization code to allow the use
17067 of Local APIC tables for processor enumeration on IA-32, and to
17068 pave the way for a fully MPS-free boot (on SMP systems) in the
17069 near future. This functionality replaces
17070 arch/i386/kernel/acpitables.c, which was introduced in an earlier
17071 2.4.15-preX release. To enable this feature you must add
17072 "acpi_boot=on" to the kernel command line -- see the help entry
17073 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
17076 Restructured the configuration options to allow boot-time table
17077 parsing support without inclusion of the ACPI Interpreter (and
17080 NOTE: This release does not include fixes for the reported events,
17081 power-down, and thermal passive cooling issues (coming soon).
17085 Added additional typechecking for Fields within restricted access
17086 Operation Regions. All fields within EC and CMOS regions must be
17087 declared with ByteAcc. All fields within SMBus regions must be
17088 declared with the BufferAcc access type.
17090 Fixed a problem where the listing file output of control methods
17091 no longer interleaved the actual AML code with the ASL source
17097 ----------------------------------------
17098 Summary of changes for this label: 11_09_01
17100 1) ACPI CA Core Subsystem:
17102 Implemented ACPI 2.0-defined support for writes to fields with a
17103 Buffer, String, or Integer source operand that is smaller than the
17104 target field. In these cases, the source operand is zero-extended
17105 to fill the target field.
17107 Fixed a problem where a Field starting bit offset (within the
17108 parent operation region) was calculated incorrectly if the
17110 alignment of the field differed from the access width. This
17111 affected CreateWordField, CreateDwordField, CreateQwordField, and
17112 possibly other fields that use the "AccessAny" keyword.
17114 Fixed a problem introduced in the 11_02_01 release where indirect
17115 stores through method arguments did not operate correctly.
17119 Implemented boot-time ACPI table parsing support
17120 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
17121 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
17122 legacy BIOS interfaces (e.g. MPS) for the configuration of system
17123 processors, memory, and interrupts during setup_arch(). Note that
17124 this patch does not include the required architecture-specific
17125 changes required to apply this information -- subsequent patches
17126 will be posted for both IA32 and IA64 to achieve this.
17128 Added low-level sleep support for IA32 platforms, courtesy of Pat
17129 Mochel. This allows IA32 systems to transition to/from various
17130 sleeping states (e.g. S1, S3), although the lack of a centralized
17131 driver model and power-manageable drivers will prevent its
17132 (successful) use on most systems.
17134 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
17135 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
17136 tables" option, etc.
17138 Increased the default timeout for the EC driver from 1ms to 10ms
17139 (1000 cycles of 10us) to try to address AE_TIME errors during EC
17142 ----------------------------------------
17143 Summary of changes for this label: 11_02_01
17145 1) ACPI CA Core Subsystem:
17147 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
17148 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
17151 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
17152 changes to support ACPI 2.0 Qword field access. Read/Write
17153 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
17154 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
17155 the value parameter for the address space handler interface is now
17156 an ACPI_INTEGER. OSL implementations of these interfaces must now
17157 handle the case where the Width parameter is 64.
17159 Index Fields: Fixed a problem where unaligned bit assembly and
17160 disassembly for IndexFields was not supported correctly.
17162 Index and Bank Fields: Nested Index and Bank Fields are now
17163 supported. During field access, a check is performed to ensure
17164 that the value written to an Index or Bank register is not out of
17165 the range of the register. The Index (or Bank) register is
17166 written before each access to the field data. Future support will
17167 include allowing individual IndexFields to be wider than the
17168 DataRegister width.
17170 Fields: Fixed a problem where the AML interpreter was incorrectly
17171 attempting to write beyond the end of a Field/OpRegion. This was
17172 a boundary case that occurred when a DWORD field was written to a
17173 BYTE access OpRegion, forcing multiple writes and causing the
17174 interpreter to write one datum too many.
17176 Fields: Fixed a problem with Field/OpRegion access where the
17177 starting bit address of a field was incorrectly calculated if the
17178 current access type was wider than a byte (WordAcc, DwordAcc, or
17181 Fields: Fixed a problem where forward references to individual
17182 FieldUnits (individual Field names within a Field definition) were
17183 not resolved during the AML table load.
17185 Fields: Fixed a problem where forward references from a Field
17186 definition to the parent Operation Region definition were not
17187 resolved during the AML table load.
17189 Fields: Duplicate FieldUnit names within a scope are now detected
17190 during AML table load.
17192 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
17193 returned an incorrect name for the root node.
17195 Code and Data Size: Code and Data optimizations have permitted new
17196 feature development with an actual reduction in the library size.
17197 Current core subsystem library sizes are shown below. These are
17198 the code and data sizes for the acpica.lib produced by the
17199 Microsoft Visual C++ 6.0 compiler, and these values do not include
17200 any ACPI driver or OSPM code. The debug version of the code
17201 includes the debug output trace mechanism and has a larger code
17202 and data size. Note that these values will vary depending on the
17203 efficiency of the compiler and the compiler options used during
17206 Previous Release (10_18_01):
17207 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17208 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17211 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17212 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17216 Improved /proc processor output (Pavel Machek) Re-added
17217 MODULE_LICENSE("GPL") to all modules.
17219 3) ASL Compiler version X2030:
17221 Duplicate FieldUnit names within a scope are now detected and
17226 Programmer Reference updated to reflect OSL and address space
17227 handler interface changes described above.
17229 ----------------------------------------
17230 Summary of changes for this label: 10_18_01
17232 ACPI CA Core Subsystem:
17234 Fixed a problem with the internal object reference count mechanism
17235 that occasionally caused premature object deletion. This resolves
17236 all of the outstanding problem reports where an object is deleted
17237 in the middle of an interpreter evaluation. Although this problem
17238 only showed up in rather obscure cases, the solution to the
17239 problem involved an adjustment of all reference counts involving
17240 objects attached to namespace nodes.
17242 Fixed a problem with Field support in the interpreter where
17243 writing to an aligned field whose length is an exact multiple (2
17244 or greater) of the field access granularity would cause an attempt
17245 to write beyond the end of the field.
17247 The top level AML opcode execution functions within the
17248 interpreter have been renamed with a more meaningful and
17249 consistent naming convention. The modules exmonad.c and
17250 exdyadic.c were eliminated. New modules are exoparg1.c,
17251 exoparg2.c, exoparg3.c, and exoparg6.c.
17253 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
17255 Fixed a problem where the AML debugger was causing some internal
17256 objects to not be deleted during subsystem termination.
17258 Fixed a problem with the external AcpiEvaluateObject interface
17259 where the subsystem would fault if the named object to be
17260 evaluated referred to a constant such as Zero, Ones, etc.
17262 Fixed a problem with IndexFields and BankFields where the
17263 subsystem would fault if the index, data, or bank registers were
17264 not defined in the same scope as the field itself.
17266 Added printf format string checking for compilers that support
17267 this feature. Corrected more than 50 instances of issues with
17268 format specifiers within invocations of ACPI_DEBUG_PRINT
17269 throughout the core subsystem code.
17271 The ASL "Revision" operator now returns the ACPI support level
17272 implemented in the core - the value "2" since the ACPI 2.0 support
17273 is more than 50% implemented.
17275 Enhanced the output of the AML debugger "dump namespace" command
17276 to output in a more human-readable form.
17278 Current core subsystem library code sizes are shown below. These
17280 are the code and data sizes for the acpica.lib produced by the
17281 Microsoft Visual C++ 6.0 compiler, and these values do not include
17282 any ACPI driver or OSPM code. The debug version of the code
17283 includes the full debug trace mechanism -- leading to a much
17285 larger code and data size. Note that these values will vary
17286 depending on the efficiency of the compiler and the compiler
17287 options used during generation.
17289 Previous Label (09_20_01):
17290 Non-Debug Version: 65K Code, 5K Data, 70K Total
17291 Debug Version: 138K Code, 58K Data, 196K Total
17295 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17296 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17300 Implemented a "Bad BIOS Blacklist" to track machines that have
17301 known ASL/AML problems.
17303 Enhanced the /proc interface for the thermal zone driver and added
17304 support for _HOT (the critical suspend trip point). The 'info'
17305 file now includes threshold/policy information, and allows setting
17306 of _SCP (cooling preference) and _TZP (polling frequency) values
17307 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
17308 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
17309 preference to the passive/quiet mode (if supported by the ASL).
17311 Implemented a workaround for a gcc bug that resuted in an OOPs
17312 when loading the control method battery driver.
17314 ----------------------------------------
17315 Summary of changes for this label: 09_20_01
17317 ACPI CA Core Subsystem:
17319 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
17320 modified to allow individual GPE levels to be flagged as wake-
17321 enabled (i.e., these GPEs are to remain enabled when the platform
17324 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
17325 support wake-enabled GPEs. This means that upon entering the
17326 sleep state, all GPEs that are not wake-enabled are disabled.
17327 When leaving the sleep state, these GPEs are re-enabled.
17329 A local double-precision divide/modulo module has been added to
17330 enhance portability to OS kernels where a 64-bit math library is
17331 not available. The new module is "utmath.c".
17333 Several optimizations have been made to reduce the use of CPU
17334 stack. Originally over 2K, the maximum stack usage is now below
17335 2K at 1860 bytes (1.82k)
17337 Fixed a problem with the AcpiGetFirmwareTable interface where the
17338 root table pointer was not mapped into a logical address properly.
17340 Fixed a problem where a NULL pointer was being dereferenced in the
17341 interpreter code for the ASL Notify operator.
17343 Fixed a problem where the use of the ASL Revision operator
17344 returned an error. This operator now returns the current version
17345 of the ACPI CA core subsystem.
17347 Fixed a problem where objects passed as control method parameters
17348 to AcpiEvaluateObject were always deleted at method termination.
17349 However, these objects may end up being stored into the namespace
17350 by the called method. The object reference count mechanism was
17351 applied to these objects instead of a force delete.
17353 Fixed a problem where static strings or buffers (contained in the
17354 AML code) that are declared as package elements within the ASL
17355 code could cause a fault because the interpreter would attempt to
17356 delete them. These objects are now marked with the "static
17357 object" flag to prevent any attempt to delete them.
17359 Implemented an interpreter optimization to use operands directly
17360 from the state object instead of extracting the operands to local
17361 variables. This reduces stack use and code size, and improves
17364 The module exxface.c was eliminated as it was an unnecessary extra
17367 Current core subsystem library code sizes are shown below. These
17368 are the code and data sizes for the acpica.lib produced by the
17369 Microsoft Visual C++ 6.0 compiler, and these values do not include
17370 any ACPI driver or OSPM code. The debug version of the code
17371 includes the full debug trace mechanism -- leading to a much
17372 larger code and data size. Note that these values will vary
17373 depending on the efficiency of the compiler and the compiler
17374 options used during generation.
17376 Non-Debug Version: 65K Code, 5K Data, 70K Total
17377 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
17378 Total (Previously 195K)
17382 Support for ACPI 2.0 64-bit integers has been added. All ACPI
17383 Integer objects are now 64 bits wide
17385 All Acpi data types and structures are now in lower case. Only
17386 Acpi macros are upper case for differentiation.
17390 Changes to the external interfaces as described above.
17392 ----------------------------------------
17393 Summary of changes for this label: 08_31_01
17395 ACPI CA Core Subsystem:
17397 A bug with interpreter implementation of the ASL Divide operator
17398 was found and fixed. The implicit function return value (not the
17399 explicit store operands) was returning the remainder instead of
17400 the quotient. This was a longstanding bug and it fixes several
17401 known outstanding issues on various platforms.
17403 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
17404 been further optimized for size. There are 700 invocations of the
17405 DEBUG_PRINT macro alone, so each optimization reduces the size of
17406 the debug version of the subsystem significantly.
17408 A stack trace mechanism has been implemented. The maximum stack
17409 usage is about 2K on 32-bit platforms. The debugger command "stat
17410 stack" will display the current maximum stack usage.
17412 All public symbols and global variables within the subsystem are
17413 now prefixed with the string "Acpi". This keeps all of the
17414 symbols grouped together in a kernel map, and avoids conflicts
17415 with other kernel subsystems.
17417 Most of the internal fixed lookup tables have been moved into the
17418 code segment via the const operator.
17420 Several enhancements have been made to the interpreter to both
17421 reduce the code size and improve performance.
17423 Current core subsystem library code sizes are shown below. These
17424 are the code and data sizes for the acpica.lib produced by the
17425 Microsoft Visual C++ 6.0 compiler, and these values do not include
17426 any ACPI driver or OSPM code. The debug version of the code
17427 includes the full debug trace mechanism which contains over 700
17428 invocations of the DEBUG_PRINT macro, 500 function entry macro
17429 invocations, and over 900 function exit macro invocations --
17430 leading to a much larger code and data size. Note that these
17431 values will vary depending on the efficiency of the compiler and
17432 the compiler options used during generation.
17434 Non-Debug Version: 64K Code, 5K Data, 69K Total
17435 Debug Version: 137K Code, 58K Data, 195K Total
17439 Implemented wbinvd() macro, pending a kernel-wide definition.
17441 Fixed /proc/acpi/event to handle poll() and short reads.
17443 ASL Compiler, version X2026:
17445 Fixed a problem introduced in the previous label where the AML
17447 code emitted for package objects produced packages with zero
17450 ----------------------------------------
17451 Summary of changes for this label: 08_16_01
17453 ACPI CA Core Subsystem:
17455 The following ACPI 2.0 ASL operators have been implemented in the
17456 AML interpreter (These are already supported by the Intel ASL
17457 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
17458 ToBuffer. Support for 64-bit AML constants is implemented in the
17459 AML parser, debugger, and disassembler.
17461 The internal memory tracking mechanism (leak detection code) has
17462 been upgraded to reduce the memory overhead (a separate tracking
17463 block is no longer allocated for each memory allocation), and now
17464 supports all of the internal object caches.
17466 The data structures and code for the internal object caches have
17467 been coelesced and optimized so that there is a single cache and
17468 memory list data structure and a single group of functions that
17469 implement generic cache management. This has reduced the code
17470 size in both the debug and release versions of the subsystem.
17472 The DEBUG_PRINT macro(s) have been optimized for size and replaced
17473 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
17474 different, because it generates a single call to an internal
17475 function. This results in a savings of about 90 bytes per
17476 invocation, resulting in an overall code and data savings of about
17477 16% in the debug version of the subsystem.
17481 Fixed C3 disk corruption problems and re-enabled C3 on supporting
17484 Integrated low-level sleep code by Patrick Mochel.
17486 Further tweaked source code Linuxization.
17492 Support for ACPI 2.0 variable length packages is fixed/completed.
17494 Fixed a problem where the optional length parameter for the ACPI
17495 2.0 ToString operator.
17497 Fixed multiple extraneous error messages when a syntax error is
17498 detected within the declaration line of a control method.
17500 ----------------------------------------
17501 Summary of changes for this label: 07_17_01
17503 ACPI CA Core Subsystem:
17505 Added a new interface named AcpiGetFirmwareTable to obtain any
17506 ACPI table via the ACPI signature. The interface can be called at
17507 any time during kernel initialization, even before the kernel
17508 virtual memory manager is initialized and paging is enabled. This
17509 allows kernel subsystems to obtain ACPI tables very early, even
17510 before the ACPI CA subsystem is initialized.
17512 Fixed a problem where Fields defined with the AnyAcc attribute
17513 could be resolved to the incorrect address under the following
17514 conditions: 1) the field width is larger than 8 bits and 2) the
17515 parent operation region is not defined on a DWORD boundary.
17517 Fixed a problem where the interpreter is not being locked during
17518 namespace initialization (during execution of the _INI control
17519 methods), causing an error when an attempt is made to release it
17522 ACPI 2.0 support in the AML Interpreter has begun and will be
17523 ongoing throughout the rest of this year. In this label, The Mod
17524 operator is implemented.
17526 Added a new data type to contain full PCI addresses named
17527 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
17528 and Function values.
17532 Enhanced the Linux version of the source code to change most
17533 capitalized ACPI type names to lowercase. For example, all
17534 instances of ACPI_STATUS are changed to acpi_status. This will
17535 result in a large diff, but the change is strictly cosmetic and
17536 aligns the CA code closer to the Linux coding standard.
17540 The interfaces to the PCI configuration space have been changed to
17541 add the PCI Segment number and to split the single 32-bit combined
17542 DeviceFunction field into two 16-bit fields. This was
17543 accomplished by moving the four values that define an address in
17544 PCI configuration space (segment, bus, device, and function) to
17545 the new ACPI_PCI_ID structure.
17547 The changes to the PCI configuration space interfaces led to a
17548 reexamination of the complete set of address space access
17549 interfaces for PCI, I/O, and Memory. The previously existing 18
17550 interfaces have proven difficult to maintain (any small change
17551 must be propagated across at least 6 interfaces) and do not easily
17552 allow for future expansion to 64 bits if necessary. Also, on some
17553 systems, it would not be appropriate to demultiplex the access
17554 width (8, 16, 32,or 64) before calling the OSL if the
17555 corresponding native OS interfaces contain a similar access width
17556 parameter. For these reasons, the 18 address space interfaces
17557 have been replaced by these 6 new ones:
17559 AcpiOsReadPciConfiguration
17560 AcpiOsWritePciConfiguration
17566 Added a new interface named AcpiOsGetRootPointer to allow the OSL
17567 to perform the platform and/or OS-specific actions necessary to
17568 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
17569 interface will simply call down to the CA core to perform the low-
17570 memory search for the table. On IA-64, the RSDP is obtained from
17571 EFI. Migrating this interface to the OSL allows the CA core to
17573 remain OS and platform independent.
17575 Added a new interface named AcpiOsSignal to provide a generic
17576 "function code and pointer" interface for various miscellaneous
17577 signals and notifications that must be made to the host OS. The
17578 first such signals are intended to support the ASL Fatal and
17579 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
17580 interface has been obsoleted.
17582 The definition of the AcpiFormatException interface has been
17583 changed to simplify its use. The caller no longer must supply a
17584 buffer to the call; A pointer to a const string is now returned
17585 directly. This allows the call to be easily used in printf
17586 statements, etc. since the caller does not have to manage a local
17590 ASL Compiler, Version X2025:
17592 The ACPI 2.0 Switch/Case/Default operators have been implemented
17593 and are fully functional. They will work with all ACPI 1.0
17594 interpreters, since the operators are simply translated to If/Else
17597 The ACPI 2.0 ElseIf operator is implemented and will also work
17598 with 1.0 interpreters, for the same reason.
17600 Implemented support for ACPI 2.0 variable-length packages. These
17601 packages have a separate opcode, and their size is determined by
17602 the interpreter at run-time.
17604 Documentation The ACPI CA Programmer Reference has been updated to
17605 reflect the new interfaces and changes to existing interfaces.
17607 ------------------------------------------
17608 Summary of changes for this label: 06_15_01
17610 ACPI CA Core Subsystem:
17612 Fixed a problem where a DWORD-accessed field within a Buffer
17613 object would get its byte address inadvertently rounded down to
17614 the nearest DWORD. Buffers are always Byte-accessible.
17616 ASL Compiler, version X2024:
17618 Fixed a problem where the Switch() operator would either fault or
17619 hang the compiler. Note however, that the AML code for this ACPI
17620 2.0 operator is not yet implemented.
17622 Compiler uses the new AcpiOsGetTimer interface to obtain compile
17625 Implementation of the CreateField operator automatically converts
17626 a reference to a named field within a resource descriptor from a
17627 byte offset to a bit offset if required.
17629 Added some missing named fields from the resource descriptor
17630 support. These are the names that are automatically created by the
17631 compiler to reference fields within a descriptor. They are only
17632 valid at compile time and are not passed through to the AML
17635 Resource descriptor named fields are now typed as Integers and
17636 subject to compile-time typechecking when used in expressions.
17638 ------------------------------------------
17639 Summary of changes for this label: 05_18_01
17641 ACPI CA Core Subsystem:
17643 Fixed a couple of problems in the Field support code where bits
17644 from adjacent fields could be returned along with the proper field
17645 bits. Restructured the field support code to improve performance,
17646 readability and maintainability.
17648 New DEBUG_PRINTP macro automatically inserts the procedure name
17649 into the output, saving hundreds of copies of procedure name
17650 strings within the source, shrinking the memory footprint of the
17651 debug version of the core subsystem.
17653 Source Code Structure:
17655 The source code directory tree was restructured to reflect the
17656 current organization of the component architecture. Some files
17657 and directories have been moved and/or renamed.
17661 Fixed leaking kacpidpc processes.
17663 Fixed queueing event data even when /proc/acpi/event is not
17666 ASL Compiler, version X2020:
17668 Memory allocation performance enhancement - over 24X compile time
17669 improvement on large ASL files. Parse nodes and namestring
17670 buffers are now allocated from a large internal compiler buffer.
17672 The temporary .SRC file is deleted unless the "-s" option is
17675 The "-d" debug output option now sends all output to the .DBG file
17676 instead of the console.
17678 "External" second parameter is now optional
17680 "ElseIf" syntax now properly allows the predicate
17682 Last operand to "Load" now recognized as a Target operand
17684 Debug object can now be used anywhere as a normal object.
17686 ResourceTemplate now returns an object of type BUFFER
17688 EISAID now returns an object of type INTEGER
17690 "Index" now works with a STRING operand
17692 "LoadTable" now accepts optional parameters
17694 "ToString" length parameter is now optional
17696 "Interrupt (ResourceType," parse error fixed.
17698 "Register" with a user-defined region space parse error fixed
17700 Escaped backslash at the end of a string ("\\") scan/parse error
17703 "Revision" is now an object of type INTEGER.
17707 ------------------------------------------
17708 Summary of changes for this label: 05_02_01
17712 /proc/acpi/event now blocks properly.
17714 Removed /proc/sys/acpi. You can still dump your DSDT from
17717 ACPI CA Core Subsystem:
17719 Fixed a problem introduced in the previous label where some of the
17720 "small" resource descriptor types were not recognized.
17722 Improved error messages for the case where an ASL Field is outside
17723 the range of the parent operation region.
17725 ASL Compiler, version X2018:
17728 Added error detection for ASL Fields that extend beyond the length
17729 of the parent operation region (only if the length of the region
17730 is known at compile time.) This includes fields that have a
17731 minimum access width that is smaller than the parent region, and
17732 individual field units that are partially or entirely beyond the
17733 extent of the parent.
17737 ------------------------------------------
17738 Summary of changes for this label: 04_27_01
17740 ACPI CA Core Subsystem:
17742 Fixed a problem where the namespace mutex could be released at the
17743 wrong time during execution of AcpiRemoveAddressSpaceHandler.
17745 Added optional thread ID output for debug traces, to simplify
17746 debugging of multiple threads. Added context switch notification
17747 when the debug code realizes that a different thread is now
17748 executing ACPI code.
17750 Some additional external data types have been prefixed with the
17751 string "ACPI_" for consistency. This may effect existing code.
17752 The data types affected are the external callback typedefs - e.g.,
17754 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
17758 Fixed an issue with the OSL semaphore implementation where a
17759 thread was waking up with an error from receiving a SIGCHLD
17762 Linux version of ACPI CA now uses the system C library for string
17763 manipulation routines instead of a local implementation.
17765 Cleaned up comments and removed TBDs.
17767 ASL Compiler, version X2017:
17769 Enhanced error detection and reporting for all file I/O
17774 Programmer Reference updated to version 1.06.
17778 ------------------------------------------
17779 Summary of changes for this label: 04_13_01
17781 ACPI CA Core Subsystem:
17783 Restructured support for BufferFields and RegionFields.
17784 BankFields support is now fully operational. All known 32-bit
17785 limitations on field sizes have been removed. Both BufferFields
17786 and (Operation) RegionFields are now supported by the same field
17789 Resource support now supports QWORD address and IO resources. The
17790 16/32/64 bit address structures and the Extended IRQ structure
17791 have been changed to properly handle Source Resource strings.
17793 A ThreadId of -1 is now used to indicate a "mutex not acquired"
17794 condition internally and must never be returned by AcpiOsThreadId.
17795 This reserved value was changed from 0 since Unix systems allow a
17800 Driver code reorganized to enhance portability
17802 Added a kernel configuration option to control ACPI_DEBUG
17804 Fixed the EC driver to honor _GLK.
17806 ASL Compiler, version X2016:
17808 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
17809 address space was set to 0, not 0x7f as it should be.
17811 ------------------------------------------
17812 Summary of changes for this label: 03_13_01
17814 ACPI CA Core Subsystem:
17816 During ACPI initialization, the _SB_._INI method is now run if
17819 Notify handler fix - notifies are deferred until the parent method
17820 completes execution. This fixes the "mutex already acquired"
17821 issue seen occasionally.
17823 Part of the "implicit conversion" rules in ACPI 2.0 have been
17824 found to cause compatibility problems with existing ASL/AML. The
17825 convert "result-to-target-type" implementation has been removed
17826 for stores to method Args and Locals. Source operand conversion
17827 is still fully implemented. Possible changes to ACPI 2.0
17828 specification pending.
17830 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
17833 Fix for compiler warnings for 64-bit compiles.
17837 /proc output aligned for easier parsing.
17839 Release-version compile problem fixed.
17841 New kernel configuration options documented in Configure.help.
17843 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
17848 Power resource driver integrated with bus manager.
17850 Fixed kernel fault during active cooling for thermal zones.
17854 The source code tree has been restructured.
17858 ------------------------------------------
17859 Summary of changes for this label: 03_02_01
17861 Linux OS Services Layer (OSL):
17863 Major revision of all Linux-specific code.
17865 Modularized all ACPI-specific drivers.
17867 Added new thermal zone and power resource drivers.
17869 Revamped /proc interface (new functionality is under /proc/acpi).
17871 New kernel configuration options.
17873 Linux known issues:
17875 New kernel configuration options not documented in Configure.help
17879 Module dependencies not currently implemented. If used, they
17880 should be loaded in this order: busmgr, power, ec, system,
17881 processor, battery, ac_adapter, button, thermal.
17883 Modules will not load if CONFIG_MODVERSION is set.
17885 IBM 600E - entering S5 may reboot instead of shutting down.
17887 IBM 600E - Sleep button may generate "Invalid <NULL> context"
17890 Some systems may fail with "execution mutex already acquired"
17893 ACPI CA Core Subsystem:
17895 Added a new OSL Interface, AcpiOsGetThreadId. This was required
17896 for the deadlock detection code. Defined to return a non-zero, 32-
17897 bit thread ID for the currently executing thread. May be a non-
17898 zero constant integer on single-thread systems.
17900 Implemented deadlock detection for internal subsystem mutexes. We
17901 may add conditional compilation for this code (debug only) later.
17903 ASL/AML Mutex object semantics are now fully supported. This
17904 includes multiple acquires/releases by owner and support for the
17906 Mutex SyncLevel parameter.
17908 A new "Force Release" mechanism automatically frees all ASL
17909 Mutexes that have been acquired but not released when a thread
17910 exits the interpreter. This forces conformance to the ACPI spec
17911 ("All mutexes must be released when an invocation exits") and
17912 prevents deadlocked ASL threads. This mechanism can be expanded
17913 (later) to monitor other resource acquisitions if OEM ASL code
17914 continues to misbehave (which it will).
17916 Several new ACPI exception codes have been added for the Mutex
17919 Recursive method calls are now allowed and supported (the ACPI
17920 spec does in fact allow recursive method calls.) The number of
17921 recursive calls is subject to the restrictions imposed by the
17922 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
17925 Implemented support for the SyncLevel parameter for control
17926 methods (ACPI 2.0 feature)
17928 Fixed a deadlock problem when multiple threads attempted to use
17931 Fixed a problem where the string length of a String package
17932 element was not always set in a package returned from
17933 AcpiEvaluateObject.
17935 Fixed a problem where the length of a String package element was
17936 not always included in the length of the overall package returned
17937 from AcpiEvaluateObject.
17939 Added external interfaces (Acpi*) to the ACPI debug memory
17940 manager. This manager keeps a list of all outstanding
17941 allocations, and can therefore detect memory leaks and attempts to
17942 free memory blocks more than once. Useful for code such as the
17943 power manager, etc. May not be appropriate for device drivers.
17944 Performance with the debug code enabled is slow.
17946 The ACPI Global Lock is now an optional hardware element.
17948 ASL Compiler Version X2015:
17950 Integrated changes to allow the compiler to be generated on
17951 multiple platforms.
17953 Linux makefile added to generate the compiler on Linux
17957 All platform-specific headers have been moved to their own
17958 subdirectory, Include/Platform.
17960 New source file added, Interpreter/ammutex.c
17962 New header file, Include/acstruct.h
17966 The programmer reference has been updated for the following new
17967 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
17969 ------------------------------------------
17970 Summary of changes for this label: 02_08_01
17972 Core ACPI CA Subsystem: Fixed a problem where an error was
17973 incorrectly returned if the return resource buffer was larger than
17974 the actual data (in the resource interfaces).
17976 References to named objects within packages are resolved to the
17978 full pathname string before packages are returned directly (via
17979 the AcpiEvaluateObject interface) or indirectly via the resource
17982 Linux OS Services Layer (OSL):
17984 Improved /proc battery interface.
17987 Added C-state debugging output and other miscellaneous fixes.
17989 ASL Compiler Version X2014:
17991 All defined method arguments can now be used as local variables,
17992 including the ones that are not actually passed in as parameters.
17993 The compiler tracks initialization of the arguments and issues an
17994 exception if they are used without prior assignment (just like
17997 The -o option now specifies a filename prefix that is used for all
17998 output files, including the AML output file. Otherwise, the
17999 default behavior is as follows: 1) the AML goes to the file
18000 specified in the DSDT. 2) all other output files use the input
18001 source filename as the base.
18003 ------------------------------------------
18004 Summary of changes for this label: 01_25_01
18006 Core ACPI CA Subsystem: Restructured the implementation of object
18007 store support within the interpreter. This includes support for
18008 the Store operator as well as any ASL operators that include a
18011 Partially implemented support for Implicit Result-to-Target
18012 conversion. This is when a result object is converted on the fly
18013 to the type of an existing target object. Completion of this
18014 support is pending further analysis of the ACPI specification
18015 concerning this matter.
18017 CPU-specific code has been removed from the subsystem (hardware
18020 New Power Management Timer functions added
18022 Linux OS Services Layer (OSL): Moved system state transition code
18023 to the core, fixed it, and modified Linux OSL accordingly.
18025 Fixed C2 and C3 latency calculations.
18028 We no longer use the compilation date for the version message on
18029 initialization, but retrieve the version from AcpiGetSystemInfo().
18031 Incorporated for fix Sony VAIO machines.
18033 Documentation: The Programmer Reference has been updated and
18037 ASL Compiler: Version X2013: Fixed a problem where the line
18038 numbering and error reporting could get out of sync in the
18039 presence of multiple include files.
18041 ------------------------------------------
18042 Summary of changes for this label: 01_15_01
18044 Core ACPI CA Subsystem:
18046 Implemented support for type conversions in the execution of the
18047 ASL Concatenate operator (The second operand is converted to
18048 match the type of the first operand before concatenation.)
18050 Support for implicit source operand conversion is partially
18051 implemented. The ASL source operand types Integer, Buffer, and
18052 String are freely interchangeable for most ASL operators and are
18053 converted by the interpreter on the fly as required. Implicit
18054 Target operand conversion (where the result is converted to the
18055 target type before storing) is not yet implemented.
18057 Support for 32-bit and 64-bit BCD integers is implemented.
18059 Problem fixed where a field read on an aligned field could cause a
18060 read past the end of the field.
18062 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
18063 does not return a value, but the caller expects one. (The ASL
18064 compiler flags this as a warning.)
18069 1. Static typechecking of all operands is implemented. This
18070 prevents the use of invalid objects (such as using a Package where
18071 an Integer is required) at compile time instead of at interpreter
18073 2. The ASL source line is printed with ALL errors and warnings.
18074 3. Bug fix for source EOF without final linefeed.
18075 4. Debug option is split into a parse trace and a namespace trace.
18076 5. Namespace output option (-n) includes initial values for
18077 integers and strings.
18078 6. Parse-only option added for quick syntax checking.
18079 7. Compiler checks for duplicate ACPI name declarations
18082 1. Relaxed typechecking to allow interchangeability between
18083 strings, integers, and buffers. These types are now converted by
18084 the interpreter at runtime.
18085 2. Compiler reports time taken by each internal subsystem in the
18089 ------------------------------------------
18090 Summary of changes for this label: 12_14_00
18094 This is the first official release of the compiler. Since the
18095 compiler requires elements of the Core Subsystem, this label
18096 synchronizes everything.
18098 ------------------------------------------
18099 Summary of changes for this label: 12_08_00
18102 Fixed a problem where named references within the ASL definition
18103 of both OperationRegions and CreateXXXFields did not work
18104 properly. The symptom was an AE_AML_OPERAND_TYPE during
18105 initialization of the region/field. This is similar (but not
18106 related internally) to the problem that was fixed in the last
18109 Implemented both 32-bit and 64-bit support for the BCD ASL
18110 functions ToBCD and FromBCD.
18112 Updated all legal headers to include "2000" in the copyright
18115 ------------------------------------------
18116 Summary of changes for this label: 12_01_00
18118 Fixed a problem where method invocations within the ASL definition
18119 of both OperationRegions and CreateXXXFields did not work
18120 properly. The symptom was an AE_AML_OPERAND_TYPE during
18121 initialization of the region/field:
18123 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
18124 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
18127 Fixed a problem where operators with more than one nested
18128 subexpression would fail. The symptoms were varied, by mostly
18129 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
18130 problem that has gone unnoticed until now.
18132 Subtract (Add (1,2), Multiply (3,4))
18134 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
18135 previous build (The prefix part of a relative path was handled
18138 Fixed a problem where Operation Region initialization failed if
18139 the operation region name was a "namepath" instead of a simple
18140 "nameseg". Symptom was an AE_NO_OPERAND error.
18142 Fixed a problem where an assignment to a local variable via the
18143 indirect RefOf mechanism only worked for the first such
18144 assignment. Subsequent assignments were ignored.
18146 ------------------------------------------
18147 Summary of changes for this label: 11_15_00
18149 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
18150 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
18151 the AML interpreter does NOT have support for the new 2.0 ASL
18152 grammar terms at this time.
18154 All ACPI hardware access is via the GAS structures in the ACPI 2.0
18157 All physical memory addresses across all platforms are now 64 bits
18158 wide. Logical address width remains dependent on the platform
18161 AcpiOsMapMemory interface changed to a 64-bit physical address.
18163 The AML interpreter integer size is now 64 bits, as per the ACPI
18166 For backwards compatibility with ACPI 1.0, ACPI tables with a
18167 revision number less than 2 use 32-bit integers only.
18169 Fixed a problem where the evaluation of OpRegion operands did not
18170 always resolve them to numbers properly.
18172 ------------------------------------------
18173 Summary of changes for this label: 10_20_00
18175 Fix for CBN_._STA issue. This fix will allow correct access to
18176 CBN_ OpRegions when the _STA returns 0x8.
18178 Support to convert ACPI constants (Ones, Zeros, One) to actual
18179 values before a package object is returned
18181 Fix for method call as predicate to if/while construct causing
18182 incorrect if/while behavior
18184 Fix for Else block package lengths sometimes calculated wrong (if
18187 Fix for Processor object length field, was always zero
18189 Table load abort if FACP sanity check fails
18191 Fix for problem with Scope(name) if name already exists
18193 Warning emitted if a named object referenced cannot be found
18194 (resolved) during method execution.
18200 ------------------------------------------
18201 Summary of changes for this label: 9_29_00
18203 New table initialization interfaces: AcpiInitializeSubsystem no
18204 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
18205 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
18206 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
18209 Note: These interface changes require changes to all existing OSDs
18211 The PCI_Config default address space handler is always installed
18212 at the root namespace object.
18214 -------------------------------------------
18215 Summary of changes for this label: 09_15_00
18217 The new initialization architecture is implemented. New
18218 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
18219 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
18221 (Namespace is automatically loaded when a table is loaded)
18223 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
18224 52 bytes to 32 bytes. There is usually one of these for every
18225 namespace object, so the memory savings is significant.
18227 Implemented just-in-time evaluation of the CreateField operators.
18229 Bug fixes for IA-64 support have been integrated.
18231 Additional code review comments have been implemented
18233 The so-called "third pass parse" has been replaced by a final walk
18234 through the namespace to initialize all operation regions (address
18235 spaces) and fields that have not yet been initialized during the
18236 execution of the various _INI and REG methods.
18238 New file - namespace/nsinit.c
18240 -------------------------------------------
18241 Summary of changes for this label: 09_01_00
18243 Namespace manager data structures have been reworked to change the
18244 primary object from a table to a single object. This has
18245 resulted in dynamic memory savings of 3X within the namespace and
18246 2X overall in the ACPI CA subsystem.
18248 Fixed problem where the call to AcpiEvFindPciRootBuses was
18249 inadvertently left commented out.
18251 Reduced the warning count when generating the source with the GCC
18254 Revision numbers added to each module header showing the
18255 SourceSafe version of the file. Please refer to this version
18256 number when giving us feedback or comments on individual modules.
18258 The main object types within the subsystem have been renamed to
18259 clarify their purpose:
18261 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
18262 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
18263 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
18265 NOTE: no changes to the initialization sequence are included in
18268 -------------------------------------------
18269 Summary of changes for this label: 08_23_00
18271 Fixed problem where TerminateControlMethod was being called
18272 multiple times per method
18274 Fixed debugger problem where single stepping caused a semaphore to
18277 Improved performance through additional parse object caching -
18278 added ACPI_EXTENDED_OP type
18280 -------------------------------------------
18281 Summary of changes for this label: 08_10_00
18283 Parser/Interpreter integration: Eliminated the creation of
18284 complete parse trees for ACPI tables and control methods.
18285 Instead, parse subtrees are created and then deleted as soon as
18286 they are processed (Either entered into the namespace or executed
18287 by the interpreter). This reduces the use of dynamic kernel
18288 memory significantly. (about 10X)
18290 Exception codes broken into classes and renumbered. Be sure to
18291 recompile all code that includes acexcep.h. Hopefully we won't
18292 have to renumber the codes again now that they are split into
18293 classes (environment, programmer, AML code, ACPI table, and
18296 Fixed some additional alignment issues in the Resource Manager
18299 Implemented semaphore tracking in the AcpiExec utility, and fixed
18300 several places where mutexes/semaphores were being unlocked
18301 without a corresponding lock operation. There are no known
18302 semaphore or mutex "leaks" at this time.
18304 Fixed the case where an ASL Return operator is used to return an
18307 -------------------------------------------
18308 Summary of changes for this label: 07_28_00
18310 Fixed a problem with the way addresses were calculated in
18311 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
18312 manifested itself when a Field was created with WordAccess or
18313 DwordAccess, but the field unit defined within the Field was less
18315 than a Word or Dword.
18317 Fixed a problem in AmlDumpOperands() module's loop to pull
18318 operands off of the operand stack to display information. The
18319 problem manifested itself as a TLB error on 64-bit systems when
18320 accessing an operand stack with two or more operands.
18322 Fixed a problem with the PCI configuration space handlers where
18323 context was getting confused between accesses. This required a
18324 change to the generic address space handler and address space
18325 setup definitions. Handlers now get both a global handler context
18326 (this is the one passed in by the user when executing
18327 AcpiInstallAddressSpaceHandler() and a specific region context
18328 that is unique to each region (For example, the _ADR, _SEG and
18329 _BBN values associated with a specific region). The generic
18330 function definitions have changed to the following:
18332 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
18333 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
18334 *HandlerContext, // This used to be void *Context void
18335 *RegionContext); // This is an additional parameter
18337 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
18338 RegionHandle, UINT32 Function, void *HandlerContext, void
18339 **RegionContext); // This used to be **ReturnContext
18341 -------------------------------------------
18342 Summary of changes for this label: 07_21_00
18344 Major file consolidation and rename. All files within the
18345 interpreter have been renamed as well as most header files. This
18346 was done to prevent collisions with existing files in the host
18347 OSs -- filenames such as "config.h" and "global.h" seem to be
18348 quite common. The VC project files have been updated. All
18349 makefiles will require modification.
18351 The parser/interpreter integration continues in Phase 5 with the
18352 implementation of a complete 2-pass parse (the AML is parsed
18353 twice) for each table; This avoids the construction of a huge
18354 parse tree and therefore reduces the amount of dynamic memory
18355 required by the subsystem. Greater use of the parse object cache
18356 means that performance is unaffected.
18358 Many comments from the two code reviews have been rolled in.
18360 The 64-bit alignment support is complete.
18362 -------------------------------------------
18363 Summary of changes for this label: 06_30_00
18365 With a nod and a tip of the hat to the technology of yesteryear,
18366 we've added support in the source code for 80 column output
18367 devices. The code is now mostly constrained to 80 columns or
18368 less to support environments and editors that 1) cannot display
18369 or print more than 80 characters on a single line, and 2) cannot
18370 disable line wrapping.
18372 A major restructuring of the namespace data structure has been
18373 completed. The result is 1) cleaner and more
18374 understandable/maintainable code, and 2) a significant reduction
18375 in the dynamic memory requirement for each named ACPI object
18378 -------------------------------------------
18379 Summary of changes for this label: 06_23_00
18381 Linux support has been added. In order to obtain approval to get
18382 the ACPI CA subsystem into the Linux kernel, we've had to make
18383 quite a few changes to the base subsystem that will affect all
18384 users (all the changes are generic and OS- independent). The
18385 effects of these global changes have been somewhat far reaching.
18386 Files have been merged and/or renamed and interfaces have been
18387 renamed. The major changes are described below.
18389 Osd* interfaces renamed to AcpiOs* to eliminate namespace
18390 pollution/confusion within our target kernels. All OSD
18391 interfaces must be modified to match the new naming convention.
18393 Files merged across the subsystem. A number of the smaller source
18394 and header files have been merged to reduce the file count and
18395 increase the density of the existing files. There are too many
18396 to list here. In general, makefiles that call out individual
18397 files will require rebuilding.
18399 Interpreter files renamed. All interpreter files now have the
18400 prefix am* instead of ie* and is*.
18402 Header files renamed: The acapi.h file is now acpixf.h. The
18403 acpiosd.h file is now acpiosxf.h. We are removing references to
18404 the acronym "API" since it is somewhat windowsy. The new name is
18405 "external interface" or xface or xf in the filenames.j
18408 All manifest constants have been forced to upper case (some were
18409 mixed case.) Also, the string "ACPI_" has been prepended to many
18410 (not all) of the constants, typedefs, and structs.
18412 The globals "DebugLevel" and "DebugLayer" have been renamed
18413 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
18415 All other globals within the subsystem are now prefixed with
18416 "AcpiGbl_" Internal procedures within the subsystem are now
18417 prefixed with "Acpi" (with only a few exceptions). The original
18418 two-letter abbreviation for the subcomponent remains after "Acpi"
18419 - for example, CmCallocate became AcpiCmCallocate.
18421 Added a source code translation/conversion utility. Used to
18422 generate the Linux source code, it can be modified to generate
18423 other types of source as well. Can also be used to cleanup
18424 existing source by removing extraneous spaces and blank lines.
18425 Found in tools/acpisrc/*
18427 OsdUnMapMemory was renamed to OsdUnmapMemory and then
18428 AcpiOsUnmapMemory. (UnMap became Unmap).
18430 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
18431 When set to one, this indicates that the caller wants to use the
18433 semaphore as a mutex, not a counting semaphore. ACPI CA uses
18434 both types. However, implementers of this call may want to use
18435 different OS primitives depending on the type of semaphore
18436 requested. For example, some operating systems provide separate
18438 "mutex" and "semaphore" interfaces - where the mutex interface is
18439 much faster because it doesn't have all the overhead of a full
18440 semaphore implementation.
18442 Fixed a deadlock problem where a method that accesses the PCI
18443 address space can block forever if it is the first access to the
18446 -------------------------------------------
18447 Summary of changes for this label: 06_02_00
18449 Support for environments that cannot handle unaligned data
18450 accesses (e.g. firmware and OS environments devoid of alignment
18451 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
18452 been added (via configurable macros) in these three areas: -
18453 Transfer of data from the raw AML byte stream is done via byte
18454 moves instead of word/dword/qword moves. - External objects are
18455 aligned within the user buffer, including package elements (sub-
18456 objects). - Conversion of name strings to UINT32 Acpi Names is now
18459 The Store operator was modified to mimic Microsoft's
18460 implementation when storing to a Buffer Field.
18462 Added a check of the BM_STS bit before entering C3.
18464 The methods subdirectory has been obsoleted and removed. A new
18465 file, cmeval.c subsumes the functionality.
18467 A 16-bit (DOS) version of AcpiExec has been developed. The
18468 makefile is under the acpiexec directory.