1 ----------------------------------------
2 10 August 2018. Summary of changes for version 20180810:
5 1) ACPICA kernel-resident subsystem:
7 Initial ACPI table loading: Attempt to continue loading ACPI tables
8 regardless of malformed AML. Since migrating table initialization to the
9 new module-level code support, the AML interpreter rejected tables upon
10 any ACPI error encountered during table load. This is a problem because
11 non-serious ACPI errors during table load do not necessarily mean that
12 the entire definition block (DSDT or SSDT) is invalid. This change
13 improves the table loading by ignoring some types of errors that can be
14 generated by incorrect AML. This can range from object type errors, scope
15 errors, and index errors.
17 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
18 during suspend/resume. The status of ACPI events is no longer cleared
19 when entering the ACPI S5 system state (power off) which caused some
20 systems to power up immediately after turning off power in certain
21 situations. This was a functional regression. It was fixed by clearing
22 the status of all ACPI events again when entering S5 (for system-wide
23 suspend or hibernation the clearing of the status of all events is not
24 desirable, as it might cause the kernel to miss wakeup events sometimes).
28 2) iASL Compiler/Disassembler and Tools:
30 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
31 elements listed in the initialization file were previously initialized
32 after the table load and before executing module-level code blocks.
33 Recent changes in the module-level code support means that the table load
34 becomes a large control method execution. If fields are used within
35 module-level code and we are executing with the -fi option, the
36 initialization values were used to initialize the namespace object(s)
37 only after the table was finished loading. This change Provides an early
38 initialization of objects specified in the initialization file so that
39 field unit values are populated during the table load (not after the
42 AcpiExec: Fixed a small memory leak regression that could result in
43 warnings during exit of the utility. These warnings were similar to
45 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
46 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
48 ----------------------------------------
49 29 June 2018. Summary of changes for version 20180629:
52 1) iASL Compiler/Disassembler and Tools:
54 iASL: Fixed a regression related to the use of the ASL External
55 statement. Error checking for the use of the External() statement has
56 been relaxed. Previously, a restriction on the use of External meant that
57 the referenced named object was required to be defined in a different
58 table (an SSDT). Thus it would be an error to declare an object as an
59 external and then define the same named object in the same table. For
64 Device (DEV1){...} // This was an error
66 However, this behavior has caused regressions in some existing ASL code,
67 because there is code that depends on named objects and externals (with
68 the same name) being declared in the same table. This change will allow
69 the ASL code above to compile without errors or warnings.
71 iASL: Implemented ASL language extensions for four operators to make some
72 of their arguments optional instead of required:
73 1) Field (RegionName, AccessType, LockRule, UpdateRule)
74 2) BankField (RegionName, BankName, BankValue,
75 AccessType, LockRule, UpdateRule)
76 3) IndexField (IndexName, DataName,
77 AccessType, LockRule, UpdateRule)
78 For the Field operators above, the AccessType, LockRule, and UpdateRule
79 are now optional arguments. The default values are:
83 4) Mutex (MutexName, SyncLevel)
84 For this operator, the SyncLevel argument is now optional. This argument
85 is rarely used in any meaningful way by ASL code, and thus it makes sense
86 to make it optional. The default value is:
89 iASL: Attempted use of the ASL Unload() operator now results in the
91 "Unload is not supported by all operating systems"
92 This is in fact very true, and the Unload operator may be completely
93 deprecated in the near future.
95 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
96 file. Recent changes in the ACPICA module-level code support altered the
97 table load/initialization sequence . This means that the table load has
98 become a large method execution of the table itself. If Operation Region
99 Fields are used within any module-level code and the -fi option was
100 specified, the initialization values were populated only after the table
101 had completely finished loading (and thus the module-level code had
102 already been executed). This change moves the initialization of objects
103 listed in the initialization file to before the table is executed as a
104 method. Field unit values are now initialized before the table execution
107 ----------------------------------------
108 31 May 2018. Summary of changes for version 20180531:
111 1) ACPICA kernel-resident Subsystem:
113 Implemented additional support to help ensure that a DSDT or SSDT is
114 fully loaded even if errors are incurred during the load. The majority of
115 the problems that are seen is the failure of individual AML operators
116 that occur during execution of any module-level code (MLC) existing in
117 the table. This support adds a mechanism to abort the current ASL
118 statement (AML opcode), emit an error message, and to simply move on to
119 the next opcode -- instead of aborting the entire table load. This is
120 different than the execution of a control method where the entire method
121 is aborted upon any error. The goal is to perform a very "best effort" to
122 load the ACPI tables. The most common MLC errors that have been seen in
123 the field are direct references to unresolved ASL/AML symbols (referenced
124 directly without the use of the CondRefOf operator to validate the
125 symbol). This new ACPICA behavior is now compatible with other ACPI
128 Interpreter: The Unload AML operator is no longer supported for the
129 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
130 1) A correct implementation on at least some hosts may not be possible.
131 2) Other ACPI implementations do not correctly/fully support it.
132 3) It requires host device driver support which is not known to exist.
133 (To properly support namespace unload out from underneath.)
134 4) This AML operator has never been seen in the field.
136 Parser: Added a debug option to dump AML parse sub-trees as they are
137 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
140 Debugger: Reduced the verbosity for errors incurred during table load and
141 module-level code execution.
143 Completed an investigation into adding a namespace node "owner list"
144 instead of the current "owner ID" associated with namespace nodes. This
145 list would link together all nodes that are owned by an individual
146 control method. The purpose would be to enhance control method execution
147 by speeding up cleanup during method exit (all namespace nodes created by
148 a method are deleted upon method termination.) Currently, the entire
149 namespace must be searched for matching owner IDs if (and only if) the
150 method creates named objects outside of the local scope. However, by far
151 the most common case is that methods create objects locally, not outside
152 the method scope. There is already an ACPICA optimization in place that
153 only searches the entire namespace in the rare case of a method creating
154 objects elsewhere in the namespace. Therefore, it is felt that the
155 overhead of adding an additional pointer to each namespace node to
156 implement the owner list makes this feature unnecessary.
159 2) iASL Compiler/Disassembler and Tools:
161 iASL, Disassembler, and Template generator: Implemented support for
162 Revision D of the IORT table. Adds a new subtable that is used to specify
163 SMMUv3 PMCGs. rmurphy-arm.
165 Disassembler: Restored correct table header validation for the "special"
166 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
167 table header and must be special-cased. This was a regression that has
168 been present for apparently a long time.
170 AcpiExec: Reduced verbosity of the local exception handler implemented
171 within acpiexec. This handler is invoked by ACPICA upon any exceptions
172 generated during control method execution. A new option was added: -vh
173 restores the original verbosity level if desired.
175 AcpiExec: Changed the default base from decimal to hex for the -x option
176 (set debug level). This simplifies the use of this option and matches the
177 behavior of the corresponding iASL -x option.
179 AcpiExec: Restored a force-exit on multiple control-c (sigint)
180 interrupts. This allows program termination even if other issues cause
181 the control-c to fail.
183 ASL test suite (ASLTS): Added tests for the recently implemented package
184 element resolution mechanism that allows forward references to named
185 objects from individual package elements (this mechanism provides
186 compatibility with other ACPI implementations.)
189 ----------------------------------------
190 8 May 2018. Summary of changes for version 20180508:
193 1) ACPICA kernel-resident subsystem:
195 Completed the new (recently deployed) package resolution mechanism for
196 the Load and LoadTable ASL/AML operators. This fixes a regression that
197 was introduced in version 20180209 that could result in an
198 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
199 (SSDT) that contains package objects.
202 2) iASL Compiler/Disassembler and Tools:
204 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
205 1 MB. This change allows for table offsets within the acpidump file to be
206 up to 8 characters. These changes are backwards compatible with existing
210 ----------------------------------------
211 27 April 2018. Summary of changes for version 20180427:
214 1) ACPICA kernel-resident subsystem:
216 Debugger: Added support for Package objects in the "Test Objects"
217 command. This command walks the entire namespace and evaluates all named
218 data objects (Integers, Strings, Buffers, and now Packages).
220 Improved error messages for the namespace root node. Originally, the root
221 was referred to by the confusing string "\___". This has been replaced by
222 "Namespace Root" for clarification.
224 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
225 Ian King <colin.king@canonical.com>.
228 2) iASL Compiler/Disassembler and Tools:
230 iASL: Implemented support to detect and flag illegal forward references.
231 For compatibility with other ACPI implementations, these references are
232 now illegal at the root level of the DSDT or SSDTs. Forward references
233 have always been illegal within control methods. This change should not
234 affect existing ASL/AML code because of the fact that these references
235 have always been illegal in the other ACPI implementation.
237 iASL: Added error messages for the case where a table OEM ID and OEM
238 TABLE ID strings are longer than the ACPI-defined length. Previously,
239 these strings were simply silently truncated.
241 iASL: Enhanced the -tc option (which creates an AML hex file in C,
242 suitable for import into a firmware project):
243 1) Create a unique name for the table, to simplify use of multiple
245 2) Add a protection #ifdef in the file, similar to a .h header file.
246 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
249 AcpiExec: Added a new option, -df, to disable the local fault handler.
250 This is useful during debugging, where it may be desired to drop into a
253 ----------------------------------------
254 13 March 2018. Summary of changes for version 20180313:
257 1) ACPICA kernel-resident subsystem:
259 Implemented various improvements to the GPE support:
261 1) Dispatch all active GPEs at initialization time so that no GPEs are
263 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
264 before devices are enumerated.
265 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
267 4) Add parallel GPE handling to eliminate the possibility of dispatching
269 5) Dispatch any pending GPEs after enabling for the first time.
271 AcpiGetObjectInfo - removed support for the _STA method. This was causing
272 problems on some platforms.
274 Added a new _OSI string, "Windows 2017.2".
276 Cleaned up and simplified the module-level code support. These changes
277 are in preparation for the eventual removal of the legacy MLC support
278 (deferred execution), replaced by the new MLC architecture which executes
279 the MLC as a table is loaded (DSDT/SSDTs).
281 Changed a compile-time option to a runtime option. Changes the option to
282 ignore ACPI table load-time package resolution errors into a runtime
283 option. Used only for platforms that generate many AE_NOT_FOUND errors
284 during boot. AcpiGbl_IgnorePackageResolutionErrors.
286 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
287 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
288 compilation errors from unused variables (seen with some compilers).
291 2) iASL Compiler/Disassembler and Tools:
293 ASLTS: parallelized execution in order to achieve an (approximately) 2X
294 performance increase.
296 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
299 ----------------------------------------
300 09 February 2018. Summary of changes for version 20180209:
303 1) ACPICA kernel-resident subsystem:
305 Completed the final integration of the recent changes to Package Object
306 handling and the module-level AML code support. This allows forward
307 references from individual package elements when the package object is
308 declared from within module-level code blocks. Provides compatibility
309 with other ACPI implementations.
311 The new architecture for the AML module-level code has been completed and
312 is now the default for the ACPICA code. This new architecture executes
313 the module-level code in-line as the ACPI table is loaded/parsed instead
314 of the previous architecture which deferred this code until after the
315 table was fully loaded. This solves some ASL code ordering issues and
316 provides compatibility with other ACPI implementations. At this time,
317 there is an option to fallback to the earlier architecture, but this
318 support is deprecated and is planned to be completely removed later this
321 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
322 resolution of named reference elements within Package objects. Although
323 this is potentially a serious problem, it can generate a lot of
324 noise/errors on platforms whose firmware carries around a bunch of unused
325 Package objects. To disable these errors, define
326 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
327 errors are always reported for ACPICA applications such as AcpiExec.
329 Fixed a regression related to the explicit type-conversion AML operators
330 (ToXXXX). The regression was introduced early in 2017 but was not seen
331 until recently because these operators are not fully supported by other
332 ACPI implementations and are thus rarely used by firmware developers. The
333 operators are defined by the ACPI specification to not implement the
334 "implicit result object conversion". The regression incorrectly
335 introduced this object conversion for the following explicit conversion
346 2) iASL Compiler/Disassembler and Tools:
348 iASL: Fixed a problem with the compiler constant folding feature as
349 related to the ToXXXX explicit conversion operators. These operators do
350 not support the "implicit result object conversion" by definition. Thus,
351 ASL expressions that use these operators cannot be folded to a simple
352 Store operator because Store implements the implicit conversion. This
353 change uses the CopyObject operator for the ToXXXX operator folding
354 instead. CopyObject is defined to not implement implicit result
355 conversions and is thus appropriate for folding the ToXXXX operators.
357 iASL: Changed the severity of an error condition to a simple warning for
358 the case where a symbol is declared both locally and as an external
359 symbol. This accommodates existing ASL code.
361 AcpiExec: The -ep option to enable the new architecture for module-level
362 code has been removed. It is replaced by the -dp option which instead has
363 the opposite effect: it disables the new architecture (the default) and
364 enables the legacy architecture. When the legacy code is removed in the
365 future, the -dp option will be removed also.
367 ----------------------------------------
368 05 January 2018. Summary of changes for version 20180105:
371 1) ACPICA kernel-resident subsystem:
373 Updated all copyrights to 2018. This affects all source code modules.
375 Fixed a possible build error caused by an unresolved reference to the
376 AcpiUtSafeStrncpy function.
378 Removed NULL pointer arithmetic in the various pointer manipulation
379 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
380 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
382 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
386 2) iASL Compiler/Disassembler and Tools:
388 ASLTS: Updated all copyrights to 2018.
390 Tools: Updated all signon copyrights to 2018.
392 AcpiXtract: Fixed a regression related to ACPI table signatures where the
393 signature was truncated to 3 characters (instead of 4).
395 AcpiExec: Restore the original terminal mode after the use of the -v and
398 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
400 ----------------------------------------
401 14 December 2017. Summary of changes for version 20171214:
404 1) ACPICA kernel-resident subsystem:
406 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
407 interface where the optional "pathname" argument had inadvertently become
408 a required argument returning an error if omitted (NULL pointer
411 Fixed two possible memory leaks related to the recently developed "late
412 resolution" of reference objects within ASL Package Object definitions.
414 Added two recently defined _OSI strings: "Windows 2016" and "Windows
415 2017". Mario Limonciello.
417 Implemented and deployed a safer version of the C library function
418 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
419 creation of unterminated strings as a possible result of a standard
422 Cleaned up and restructured the global variable file (acglobal.h). There
423 are many changes, but no functional changes.
426 2) iASL Compiler/Disassembler and Tools:
428 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
429 optional OemData field at the end of the table was incorrectly required
430 for proper compilation. It is now correctly an optional field.
432 ASLTS: The entire suite was converted from standard ASL to the ASL+
433 language, using the ASL-to-ASL+ converter which is integrated into the
434 iASL compiler. A binary compare of all output files has verified the
435 correctness of the conversion.
437 iASL: Fixed the source code build for platforms where "char" is unsigned.
438 This affected the iASL lexer only. Jung-uk Kim.
440 ----------------------------------------
441 10 November 2017. Summary of changes for version 20171110:
444 1) ACPICA kernel-resident subsystem:
446 This release implements full support for ACPI 6.2A:
447 NFIT - Added a new subtable, "Platform Capabilities Structure"
448 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
449 errata release of the specification.
451 Other ACPI table changes:
452 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
453 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
456 Utilities: Modified the string/integer conversion functions to use
457 internal 64-bit divide support instead of a native divide. On 32-bit
458 platforms, a 64-bit divide typically requires a library function which
459 may not be present in the build (kernel or otherwise).
461 Implemented a targeted error message for timeouts returned from the
462 Embedded Controller device driver. This is seen frequently enough to
463 special-case an AE_TIME returned from an EC operation region access:
464 "Timeout from EC hardware or EC device driver"
466 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
467 runtime error messages have the identical prefix.
470 2) iASL Compiler/Disassembler and Tools:
472 AcpiXtract: Fixed a problem with table header detection within the
473 acpidump file. Processing a table could be ended early if a 0x40 (@)
474 appears in the original binary table, resulting in the @ symbol appearing
475 in the decoded ASCII field at the end of the acpidump text line. The
476 symbol caused acpixtract to incorrectly think it had reached the end of
477 the current table and the beginning of a new table.
479 AcpiXtract: Added an option (-f) to ignore some errors during table
480 extraction. This initial implementation ignores non-ASCII and non-
481 printable characters found in the acpidump text file.
483 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
484 for ASLTS. This feature is used to track memory allocations from
485 different memory caches within the ACPICA code. At the end of an ASLTS
486 run, these memory statistics are recorded and stored in a log file.
488 Debugger (user-space version): Implemented a simple "Background" command.
489 Creates a new thread to execute a control method in the background, while
490 control returns to the debugger prompt to allow additional commands.
491 Syntax: Background <Namepath> [Arguments]
493 ----------------------------------------
494 29 September 2017. Summary of changes for version 20170929:
497 1) ACPICA kernel-resident subsystem:
499 Redesigned and implemented an improved ASL While() loop timeout
500 mechanism. This mechanism is used to prevent infinite loops in the kernel
501 AML interpreter caused by either non-responsive hardware or incorrect AML
502 code. The new implementation uses AcpiOsGetTimer instead of a simple
503 maximum loop count, and is thus more accurate and constant across
504 different machines. The default timeout is currently 30 seconds, but this
505 may be adjusted later.
507 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
508 better reflect the new implementation of the loop timeout mechanism.
510 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
511 and to fix an off-by-one error. Jung-uk Kim.
513 Fixed an EFI build problem by updating the makefiles to for a new file
514 that was added, utstrsuppt.c
517 2) iASL Compiler/Disassembler and Tools:
519 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
520 includes support in the table disassembler, compiler, and template
523 iASL: Added an exception for an illegal type of recursive method
524 invocation. If a method creates named objects, the first recursive call
525 will fail at runtime. This change adds an error detection at compile time
526 to catch the problem up front. Note: Marking such a method as
527 "serialized" will not help with this problem, because the same thread can
528 acquire the method mutex more than once. Example compiler and runtime
538 Error 6152 - ^ Illegal recursive call to method
539 that creates named objects (MTH1)
541 Previous runtime exception:
542 ACPI Error: [INT1] Namespace lookup failure,
543 AE_ALREADY_EXISTS (20170831/dswload2-465)
545 iASL: Updated support for External() opcodes to improve namespace
546 management and error detection. These changes are related to issues seen
547 with multiple-segment namespace pathnames within External declarations,
550 External(\_SB.PCI0.GFX0, DeviceObj)
551 External(\_SB.PCI0.GFX0.ALSI)
553 iASL: Implemented support for multi-line error/warning messages. This
554 enables more detailed and helpful error messages as below, from the
555 initial deployment for the duplicate names error:
557 DSDT.iiii 1692: Device(PEG2) {
558 Error 6074 - ^ Name already exists in scope
561 Original name creation/declaration below:
562 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
564 AcpiXtract: Added additional flexibility to support differing input hex
565 dump formats. Specifically, hex dumps that contain partial disassembly
566 and/or comments within the ACPI table data definition. There exist some
567 dump utilities seen in the field that create this type of hex dump (such
568 as Simics). For example:
570 DSDT @ 0xdfffd0c0 (10999 bytes)
578 Creator_id 1280593481
579 Creator_revision 537399345
580 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
582 2af0: 5f 4c 30 46 00 a4 01
584 Test suite: Miscellaneous changes/fixes:
585 More cleanup and simplification of makefiles
586 Continue compilation of test cases after a compile failure
587 Do not perform binary compare unless both files actually exist
589 iASL: Performed some code/module restructuring. Moved all memory
590 allocation functions to new modules. Two new files, aslallocate.c and
593 ----------------------------------------
594 31 August 2017. Summary of changes for version 20170831:
597 1) ACPICA kernel-resident subsystem:
599 Implemented internal support for full 64-bit addresses that appear in all
600 Generic Address Structure (GAS) structures. Previously, only the lower 32
601 bits were used. Affects the use of GAS structures in the FADT and other
602 tables, as well as the GAS structures passed to the AcpiRead and
603 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
605 Added header support for the PDTT ACPI table (Processor Debug Trigger
606 Table). Full support in the iASL Data Table Compiler and disassembler is
610 2) iASL Compiler/Disassembler and Tools:
612 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
613 Properties Topology Table) where a flag bit was specified in the wrong
614 bit position ("Line Size Valid", bit 6).
616 iASL: Implemented support for Octal integer constants as defined by the
617 ASL language grammar, per the ACPI specification. Any integer constant
618 that starts with a zero is an octal constant. For example,
619 Store (037777, Local0) /* Octal constant */
620 Store (0x3FFF, Local0) /* Hex equivalent */
621 Store (16383, Local0) /* Decimal equivalent */
623 iASL: Improved overflow detection for 64-bit string conversions during
624 compilation of integer constants. "Overflow" in this case means a string
625 that represents an integer that is too large to fit into a 64-bit value.
626 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
627 the low-order 32 bits with a warning, as previously implemented. Several
628 new exceptions are defined that indicate a 64-bit overflow, as well as
629 the base (radix) that was used during the attempted conversion. Examples:
630 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
631 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
632 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
634 iASL: Added a warning for the case where a ResourceTemplate is declared
635 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
636 this case, the resulting template is created with a single END_TAG
637 descriptor, which is essentially useless.
639 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
640 include compilation error codes as well.
642 ----------------------------------------
643 28 July 2017. Summary of changes for version 20170728:
646 1) ACPICA kernel-resident subsystem:
648 Fixed a regression seen with small resource descriptors that could cause
649 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
651 AML interpreter: Implemented a new feature that allows forward references
652 from individual named references within package objects that are
653 contained within blocks of "module-level code". This provides
654 compatibility with other ACPI implementations and supports existing
655 firmware that depends on this feature. Example:
658 If (ABCD) /* An If() at module-level */
660 Name (PKG1, Package()
662 INT1 /* Forward reference to object INT1
668 AML Interpreter: Fixed a problem with the Alias() operator where aliases
669 to some ASL objects were not handled properly. Objects affected are:
670 Mutex, Event, and OperationRegion.
672 AML Debugger: Enhanced to properly handle AML Alias objects. These
673 objects have one level of indirection which was not fully supported by
676 Table Manager: Added support to detect and ignore duplicate SSDTs within
677 the XSDT/RSDT. This error in the XSDT has been seen in the field.
679 EFI and EDK2 support:
680 Enabled /WX flag for MSVC builds
681 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
682 Added local support for 64-bit multiply and shift operations
683 Added support to compile acpidump.efi on Windows
684 Added OSL function stubs for interfaces not used under EFI
686 Added additional support for the _DMA predefined name. _DMA returns a
687 buffer containing a resource template. This change add support within the
688 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
689 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
692 2) iASL Compiler/Disassembler and Tools:
694 iASL: Fixed a problem where the internal input line buffer(s) could
695 overflow if there are very long lines in the input ASL source code file.
696 Implemented buffer management that automatically increases the size of
697 the buffers as necessary.
699 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
700 errors. If the specified exception is not raised during compilation, the
701 compiler emits an error. This is intended to support the ASL test suite,
702 but may be useful in other contexts.
704 iASL: Implemented a new predefined macro, __METHOD__, which returns a
705 string containing the name of the current control method that is being
708 iASL: Implemented debugger and table compiler support for the SDEI ACPI
709 table (Software Delegated Exception Interface). James Morse
710 <james.morse@arm.com>
712 Unix/Linux makefiles: Added an option to disable compile optimizations.
713 The disable occurs when the NOOPT flag is set to TRUE.
714 theracermaster@gmail.com
716 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
717 when there are different tables for 32-bit versus 64-bit.
719 Enhanced error reporting for the ASL test suite (ASLTS) by removing
720 unnecessary/verbose text, and emit the actual line number where an error
721 has occurred. These changes are intended to improve the usefulness of the
724 ----------------------------------------
725 29 June 2017. Summary of changes for version 20170629:
728 1) ACPICA kernel-resident subsystem:
730 Tables: Implemented a deferred ACPI table verification. This is useful
731 for operating systems where the tables cannot be verified in the early
732 initialization stage due to early memory mapping limitations on some
733 architectures. Lv Zheng.
735 Tables: Removed the signature validation for dynamically loaded tables.
736 Provides compatibility with other ACPI implementations. Previously, only
737 SSDT tables were allowed, as per the ACPI specification. Now, any table
738 signature can be used via the Load() operator. Lv Zheng.
740 Tables: Fixed several mutex issues that could cause errors during table
741 acquisition. Lv Zheng.
743 Tables: Fixed a problem where an ACPI warning could be generated if a
744 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
746 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
747 AcpiPutTable interfaces. This applies to the "late stage" table loading
748 when the use of AcpiPutTable is no longer required (since the system
749 memory manager is fully running and available). Lv Zheng.
751 Fixed/Reverted a regression during processing of resource descriptors
752 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
753 exception in this case.
755 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
756 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
758 Interpreter: Fixed a possible fault if an Alias operator with an invalid
759 or duplicate target is encountered during Alias creation in
760 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
762 Added an option to use designated initializers for function pointers.
763 Kees Cook <keescook@google.com>
766 2) iASL Compiler/Disassembler and Tools:
768 iASL: Allow compilation of External declarations with target pathnames
769 that refer to existing named objects within the table. Erik Schmauss.
771 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
772 FieldUnit name also is declared via External in the same table. Erik
775 iASL: Allow existing scope names within pathnames used in External
776 statements. For example:
777 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
780 iASL: IORT ACPI table: Implemented changes required to decode the new
781 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
782 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
784 Disassembler: Don't abort disassembly on errors from External()
785 statements. Erik Schmauss.
787 Disassembler: fixed a possible fault when one of the Create*Field
788 operators references a Resource Template. ACPICA Bugzilla 1396.
790 iASL: In the source code, resolved some naming inconsistences across the
791 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
792 Adds a new file, aslparseop.c
794 ----------------------------------------
795 31 May 2017. Summary of changes for version 20170531:
800 The ACPI specification version 6.2 has been released and is available at
801 http://uefi.org/specifications
803 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
804 are summarized below.
806 New ACPI tables (Table Compiler/Disassembler/Templates):
807 HMAT (Heterogeneous Memory Attributes Table)
808 WSMT (Windows SMM Security Mitigation Table)
809 PPTT (Processor Properties Topology Table)
811 New subtables for existing ACPI tables:
812 HEST (New subtable, Arch-deferred machine check)
813 SRAT (New subtable, Arch-specific affinity structure)
814 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
816 Simple updates for existing ACPI tables:
817 BGRT (two new flag bits)
818 HEST (New bit defined for several subtables, GHES_ASSIST)
820 New Resource Descriptors and Resource macros (Compiler/Disassembler):
826 New type for hardware error notification (section 18.3.2.9)
828 New predefined names/methods (Compiler/Interpreter):
829 _HMA (Heterogeneous Memory Attributes)
830 _LSI (Label Storage Information)
831 _LSR (Label Storage Read)
832 _LSW (Label Storage Write)
834 ASL grammar/macro changes (Compiler):
835 For() ASL macro, implemented with the AML while operator
836 Extensions to Concatenate operator
837 Support for multiple definition blocks in same ASL file
838 Clarification for Buffer operator
839 Allow executable AML code underneath all scopes (Devices, etc.)
840 Clarification/change for the _OSI return value
841 ASL grammar update for reference operators
842 Allow a zero-length string for AML filename in DefinitionBlock
845 New device object notification value
846 Remove a notify value (0x0C) for graceful shutdown
847 New UUIDs for processor/cache properties and
848 physical package property
849 New _HID, ACPI0014 (Wireless Power Calibration Device)
852 1) ACPICA kernel-resident subsystem:
854 Added support to disable ACPI events on hardware-reduced platforms.
855 Eliminates error messages of the form "Could not enable fixed event". Lv
858 Fixed a problem using Device/Thermal objects with the ObjectType and
859 DerefOf ASL operators. This support had not been fully/properly
862 Fixed a problem where if a Buffer object containing a resource template
863 was longer than the actual resource template, an error was generated --
864 even though the AML is legal. This case has been seen in the field.
866 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
867 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
869 Added header file changes for the TPM2 ACPI table. Update to new version
870 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
872 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
873 These interfaces are intended to be used only in conjunction with the
874 predefined _DLM method (Device Lock Method). "This object appears in a
875 device scope when AML access to the device must be synchronized with the
878 Example Code and Data Size: These are the sizes for the OS-independent
879 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
880 debug version of the code includes the debug output trace mechanism and
881 has a much larger code and data size.
884 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
885 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
887 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
888 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
891 2) iASL Compiler/Disassembler and Tools:
893 iASL: Fixed a problem where an External() declaration could not refer to
894 a Field Unit. Erik Schmauss.
896 Disassembler: Improved support for the Switch/Case operators. This
897 feature will disassemble AML code back to the original Switch operators
898 when possible, instead of an If..Else sequence. David Box
900 iASL and disassembler: Improved the handling of multiple extraneous
901 parentheses for both ASL input and disassembled ASL output.
903 Improved the behavior of the iASL compiler and disassembler to detect
904 improper use of external declarations
906 Disassembler: Now aborts immediately upon detection of an unknown AML
907 opcode. The AML parser has no real way to recover from this, and can
908 result in the creation of an ill-formed parse tree that causes errors
909 later during the disassembly.
911 All tools: Fixed a problem where the Unix application OSL did not handle
912 control-c correctly. For example, a control-c could incorrectly wake the
915 AcpiExec: Improved the Control-C handling and added a handler for
916 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
919 Reduced the verbosity of the generic unix makefiles. Previously, each
920 compilation displayed the full set of compiler options. This has been
921 eliminated as the options are easily inspected within the makefiles. Each
922 compilation now results in a single line of output.
924 ----------------------------------------
925 03 March 2017. Summary of changes for version 20170303:
930 The licensing information at the start of each source code module has
931 been updated. In addition to the Intel license, the dual GPLv2/BSD
932 license has been added for completeness. Now, a single version of the
933 source code should be suitable for all ACPICA customers. This is the
934 major change for this release since it affects all source code modules.
937 1) ACPICA kernel-resident subsystem:
939 Fixed two issues with the common asltypes.h header that could cause
940 problems in some environments: (Kim Jung-uk)
941 Removed typedef for YY_BUFFER_STATE ?
942 Fixes an error with earlier versions of Flex.
943 Removed use of FILE typedef (which is only defined in stdio.h)
946 2) iASL Compiler/Disassembler and Tools:
948 Disassembler: fixed a regression introduced in 20170224. A fix for a
949 memory leak related to resource descriptor tags (names) could fault when
950 the disassembler was generated with 64-bit compilers.
952 The ASLTS test suite has been updated to implement a new testing
953 architecture. During generation of the suite from ASL source, both the
954 ASL and ASL+ compilers are now validated, as well as the disassembler
955 itself (Erik Schmauss). The architecture executes as follows:
957 For every ASL source module:
958 Compile (legacy ASL compilation)
959 Disassemble the resulting AML to ASL+ source code
960 Compile the new ASL+ module
961 Perform a binary compare on the legacy AML and the new ASL+ AML
962 The ASLTS suite then executes normally using the AML binaries.
964 ----------------------------------------
965 24 February 2017. Summary of changes for version 20170224:
968 1) ACPICA kernel-resident subsystem:
970 Interpreter: Fixed two issues with the control method return value auto-
971 repair feature, where an attempt to double-delete an internal object
972 could result in an ACPICA warning (for _CID repair and others). No fault
973 occurs, however, because the attempted deletion (actually a release to an
974 internal cache) is detected and ignored via object poisoning.
976 Debugger: Fixed an AML interpreter mutex issue during the single stepping
977 of control methods. If certain debugger commands are executed during
978 stepping, a mutex aquire/release error could occur. Lv Zheng.
980 Fixed some issues generating ACPICA with the Intel C compiler by
981 restoring the original behavior and compiler-specific include file in
984 Example Code and Data Size: These are the sizes for the OS-independent
985 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
986 debug version of the code includes the debug output trace mechanism and
987 has a much larger code and data size.
990 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
991 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
993 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
994 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
997 2) iASL Compiler/Disassembler and Tools:
999 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
1000 tool has been designed, implemented, and included in this release. The
1001 key feature of this utility is that the original comments within the
1002 input ASL file are preserved during the conversion process, and included
1003 within the converted ASL+ file -- thus creating a transparent conversion
1004 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
1006 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
1009 iASL/Disassembler: Improved the detection and correct disassembly of
1010 Switch/Case operators. This feature detects sequences of if/elseif/else
1011 operators that originated from ASL Switch/Case/Default operators and
1012 emits the original operators. David Box.
1014 iASL: Improved the IORT ACPI table support in the following areas. Lv
1016 Clear MappingOffset if the MappingCount is zero.
1017 Fix the disassembly of the SMMU GSU interrupt offset.
1018 Update the template file for the IORT table.
1020 Disassembler: Enhanced the detection and disassembly of resource
1021 template/descriptor within a Buffer object. An EndTag descriptor is now
1022 required to have a zero second byte, since all known ASL compilers emit
1023 this. This helps eliminate incorrect decisions when a buffer is
1024 disassembled (false positives on resource templates).
1026 ----------------------------------------
1027 19 January 2017. Summary of changes for version 20170119:
1030 1) General ACPICA software:
1032 Entire source code base: Added the 2017 copyright to all source code
1033 legal/licensing module headers and utility/tool signons. This includes
1034 the standard Linux dual-license header. This affects virtually every file
1035 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
1036 the ACPICA test suite.
1039 2) iASL Compiler/Disassembler and Tools:
1041 iASL: Removed/fixed an inadvertent remark when a method argument
1042 containing a reference is used as a target operand within the method (and
1043 never used as a simple argument), as in the example below. Jeffrey Hugo.
1045 dsdt.asl 1507: Store(0x1, Arg0)
1046 Remark 2146 - ^ Method Argument is never used (Arg0)
1048 All tools: Removed the bit width of the compiler that generated the tool
1049 from the common signon for all user space tools. This proved to be
1050 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
1051 from the generic makefiles (Thomas Petazzoni). Example below.
1054 ASL+ Optimizing Compiler version 20170119-32
1055 ASL+ Optimizing Compiler version 20170119-64
1058 ASL+ Optimizing Compiler version 20170119
1060 ----------------------------------------
1061 22 December 2016. Summary of changes for version 20161222:
1064 1) ACPICA kernel-resident subsystem:
1066 AML Debugger: Implemented a new mechanism to simplify and enhance
1067 debugger integration into all environments, including kernel debuggers
1068 and user-space utilities, as well as remote debug services. This
1069 mechanism essentially consists of new OSL interfaces to support debugger
1070 initialization/termination, as well as wait/notify interfaces to perform
1071 the debugger handshake with the host. Lv Zheng.
1074 AcpiOsInitializeDebugger (void)
1075 AcpiOsTerminateDebugger (void)
1076 AcpiOsWaitCommandReady (void)
1077 AcpiOsNotifyCommandComplete (void)
1079 New OS services layer:
1080 osgendbg.c -- Example implementation, and used for AcpiExec
1082 Update for Generic Address Space (GAS) support: Although the AccessWidth
1083 and/or BitOffset fields of the GAS are not often used, this change now
1084 fully supports these fields. This affects the internal support for FADT
1085 registers, registers in other ACPI data tables, and the AcpiRead and
1086 AcpiWrite public interfaces. Lv Zheng.
1088 Sleep support: In order to simplify integration of ACPI sleep for the
1089 various host operating systems, a new OSL interface has been introduced.
1090 AcpiOsEnterSleep allows the host to perform any required operations
1091 before the final write to the sleep control register(s) is performed by
1095 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
1097 Called from these internal interfaces:
1101 EFI support: Added a very small EFI/ACPICA example application. Provides
1102 a simple demo for EFI integration, as well as assisting with resolution
1103 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
1105 source/tools/efihello/efihello.c
1107 Local C library: Implemented several new functions to enhance ACPICA
1108 portability, for environments where these clib functions are not
1109 available (such as EFI). Lv Zheng:
1116 Fixed a regression where occasionally a valid resource descriptor was
1117 incorrectly detected as invalid at runtime, and a
1118 AE_AML_NO_RESOURCE_END_TAG was returned.
1120 Fixed a problem with the recently implemented support that enables
1121 control method invocations as Target operands to many ASL operators.
1122 Warnings of this form: "Needed type [Reference], found [Processor]" were
1123 seen at runtime for some method invocations.
1125 Example Code and Data Size: These are the sizes for the OS-independent
1126 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1127 debug version of the code includes the debug output trace mechanism and
1128 has a much larger code and data size.
1131 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
1132 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
1134 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1135 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1138 2) iASL Compiler/Disassembler and Tools:
1140 Disassembler: Enhanced output by adding the capability to detect and
1141 disassemble ASL Switch/Case statements back to the original ASL source
1142 code instead of if/else blocks. David Box.
1144 AcpiHelp: Split a large file into separate files based upon
1145 functionality/purpose. New files are:
1149 ----------------------------------------
1150 17 November 2016. Summary of changes for version 20161117:
1153 1) ACPICA kernel-resident subsystem:
1155 Table Manager: Fixed a regression introduced in 20160729, "FADT support
1156 cleanup". This was an attempt to remove all references in the source to
1157 the FADT version 2, which never was a legal version number. It was
1158 skipped because it was an early version of 64-bit support that was
1159 eventually abandoned for the current 64-bit support.
1161 Interpreter: Fixed a problem where runtime implicit conversion was
1162 incorrectly disabled for the ASL operators below. This brings the
1163 behavior into compliance with the ACPI specification:
1171 Table Manager: Added a new public interface, AcpiPutTable, used to
1172 release and free an ACPI table returned by AcpiGetTable and related
1173 interfaces. Lv Zheng.
1175 Example Code and Data Size: These are the sizes for the OS-independent
1176 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1177 debug version of the code includes the debug output trace mechanism and
1178 has a much larger code and data size.
1181 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1182 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1184 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1185 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1188 2) iASL Compiler/Disassembler and Tools:
1190 Disassembler: Fixed a regression for disassembly of Resource Template.
1191 Detection of templates in the AML stream missed some types of templates.
1193 iASL: Fixed a problem where an Access Size error was returned for the PCC
1194 address space when the AccessSize of the GAS register is greater than a
1197 iASL: Implemented several grammar changes for the operators below. These
1198 changes are slated for the next version of the ACPI specification:
1199 RefOf - Disallow method invocation as an operand
1200 CondRefOf - Disallow method invocation as an operand
1201 DerefOf - Disallow operands that use the result from operators
1203 do not return a reference (Changed TermArg to
1206 iASL: Control method invocations are now allowed for Target operands, as
1207 per the ACPI specification. Removed error for using a control method
1208 invocation as a Target operand.
1210 Disassembler: Improved detection of Resource Templates, Unicode, and
1211 Strings within Buffer objects. These subtypes do not contain a specific
1212 opcode to indicate the originating ASL code, and they must be detected by
1213 other means within the disassembler.
1215 iASL: Implemented an optimization improvement for 32-bit ACPI tables
1216 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
1217 only after 64-bit to 32-bit truncation. A truncation warning message is
1218 still emitted, however.
1220 AcpiXtract: Implemented handling for both types of line terminators (LF
1221 or CR/LF) so that it can accept AcpiDump output files from any system.
1224 AcpiBin: Added two new options for comparing AML files:
1225 -a: compare and display ALL mismatches
1226 -o: start compare at this offset into the second file
1228 ----------------------------------------
1229 30 September 2016. Summary of changes for version 20160930:
1232 1) ACPICA kernel-resident subsystem:
1234 Fixed a regression in the internal AcpiTbFindTable function where a non
1235 AE_OK exception could inadvertently be returned even if the function did
1236 not fail. This problem affects the following operators:
1240 Fixed a regression in the LoadTable operator where a load to any
1241 namespace location other than the root no longer worked properly.
1243 Increased the maximum loop count value that will result in the
1244 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
1245 prevent infinite loops within the AML interpreter and thus the host OS
1246 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
1249 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
1250 acpixf.h file. This allows hosts to easily configure the maximum loop
1253 Removed an illegal character in the strtoul64.c file. This character
1254 caused errors with some C compilers.
1256 Example Code and Data Size: These are the sizes for the OS-independent
1257 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1258 debug version of the code includes the debug output trace mechanism and
1259 has a much larger code and data size.
1262 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1263 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1265 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
1266 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1269 2) iASL Compiler/Disassembler and Tools:
1271 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
1272 the simpler ASL ElseIf keyword. During the conversion, a trailing If
1273 block could be lost and missing from the disassembled output.
1275 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
1276 the missing rule caused a parse error when using the Index operator as an
1277 operand to ObjectType. This construct now compiles properly. Example:
1278 ObjectType(PKG1[4]).
1280 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
1281 option). Previously, unresolved symbols could cause a protection fault.
1282 Such symbols are now marked as unresolved in the map file.
1284 iASL: Implemented support to allow control method invocations as an
1285 operand to the ASL DeRefOf operator. Example:
1286 DeRefOf(MTH1(Local0))
1288 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
1289 possible _PLD buffer now includes examination of both the normal buffer
1290 length (16 or 20) as well as the surrounding AML package length.
1292 Disassembler: Fixed a problem with the decoding of complex expressions
1293 within the Divide operator for ASL+. For the case where both the quotient
1294 and remainder targets are specified, the entire statement cannot be
1295 disassembled. Previously, the output incorrectly contained a mix of ASL-
1296 and ASL+ operators. This mixed statement causes a syntax error when
1298 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
1300 Divide (INT1 + 6, 128, RSLT, QUOT)
1302 iASL/Tools: Added support to process AML and non-AML ACPI tables
1303 consistently. For the disassembler and AcpiExec, allow all types of ACPI
1304 tables (AML and data tables). For the iASL -e option, allow only AML
1307 ----------------------------------------
1308 31 August 2016. Summary of changes for version 20160831:
1311 1) ACPICA kernel-resident subsystem:
1313 Improve support for the so-called "module-level code", which is defined
1314 to be math, logical and control AML opcodes that appear outside of any
1315 control method. This change improves the support by adding more opcodes
1316 that can be executed in the manner. Some other issues have been solved,
1317 and the ASL grammar changes to support such code under all scope
1318 operators (Device, etc.) are complete. Lv Zheng.
1320 UEFI support: these OSL functions have been implemented. This is an
1321 additional step toward supporting the AcpiExec utility natively (with
1322 full hardware access) under UEFI. Marcelo Ferreira.
1323 AcpiOsReadPciConfiguration
1324 AcpiOsWritePciConfiguration
1326 Fixed a possible mutex error during control method auto-serialization. Lv
1329 Updated support for the Generic Address Structure by fully implementing
1330 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
1333 Updated the return value for the internal _OSI method. Instead of
1334 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
1335 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
1336 implementations, and will be reflected and clarified in the next version
1337 of the ACPI specification.
1339 Implemented two new table events that can be passed to an ACPICA table
1340 handler. These events are used to indicate a table installation or
1341 uninstallation. These events are used in addition to existed table load
1342 and unload events. Lv Zheng.
1344 Implemented a cleanup for all internal string-to-integer conversions.
1345 Consolidate multiple versions of this functionality and limit possible
1346 bases to either 10 or 16 to simplify the code. Adds a new file,
1349 Cleanup the inclusion order of the various compiler-specific headers.
1350 This simplifies build configuration management. The compiler-specific
1351 headers are now split out from the host-specific headers. Lv Zheng.
1353 Example Code and Data Size: These are the sizes for the OS-independent
1354 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1355 debug version of the code includes the debug output trace mechanism and
1356 has a much larger code and data size.
1359 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
1360 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1363 2) iASL Compiler/Disassembler and Tools:
1365 iASL/AcpiExec: Added a command line option to display the build date/time
1366 of the tool (-vd). This can be useful to verify that the correct version
1367 of the tools are being used.
1369 AML Debugger: Implemented a new subcommand ("execute predef") to execute
1370 all predefined control methods and names within the current namespace.
1371 This can be useful for debugging problems with ACPI tables and the ACPI
1374 ----------------------------------------
1375 29 July 2016. Summary of changes for version 20160729:
1378 1) ACPICA kernel-resident subsystem:
1380 Implemented basic UEFI support for the various ACPICA tools. This
1382 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
1383 2) Support to obtain the ACPI tables on UEFI.
1384 3) Local implementation of required C library functions not available on
1386 4) A front-end (main) function for the tools for UEFI-related
1389 The initial deployment of this support is the AcpiDump utility executing
1390 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
1391 Current environments supported are Linux/Unix. MSVC generation is not
1392 supported at this time. See the generate/efi/README file for build
1393 instructions. Lv Zheng.
1395 Future plans include porting the AcpiExec utility to execute natively on
1396 the platform with I/O and memory access. This will allow viewing/dump of
1397 the platform namespace and native execution of ACPI control methods that
1398 access the actual hardware. To fully implement this support, the OSL
1399 functions below must be implemented with UEFI interfaces. Any community
1400 help in the implementation of these functions would be appreciated:
1405 AcpiOsReadPciConfiguration
1406 AcpiOsWritePciConfiguration
1408 Restructured and standardized the C library configuration for ACPICA,
1409 resulting in the various configuration options below. This includes a
1410 global restructuring of the compiler-dependent and platform-dependent
1411 include files. These changes may affect the existing platform-dependent
1412 configuration files on some hosts. Lv Zheng.
1414 The current C library configuration options appear below. For any issues,
1415 it may be helpful to examine the existing compiler-dependent and
1416 platform-dependent files as examples. Lv Zheng.
1419 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1421 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1422 2) Unix/Windows/BSD applications:
1423 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
1425 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1426 3) UEFI applications:
1427 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1429 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
1430 4) UEFI applications (EDK2/StdLib):
1431 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
1432 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
1435 AML interpreter: "module-level code" support. Allows for execution of so-
1436 called "executable" AML code (math/logical operations, etc.) outside of
1437 control methods not just at the module level (top level) but also within
1438 any scope declared outside of a control method - Scope{}, Device{},
1439 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
1441 Simplified the configuration of the "maximum AML loops" global option by
1442 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
1443 modified at runtime.
1446 Example Code and Data Size: These are the sizes for the OS-independent
1447 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1448 debug version of the code includes the debug output trace mechanism and
1449 has a much larger code and data size.
1452 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
1453 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
1456 2) iASL Compiler/Disassembler and Tools:
1458 iASL: Add full support for the RASF ACPI table (RAS Features Table).
1459 Includes disassembler, data table compiler, and header support.
1461 iASL Expand "module-level code" support. Allows for
1462 compilation/disassembly of so-called "executable" AML code (math/logical
1463 operations, etc.) outside of control methods not just at the module level
1464 (top level) but also within any scope declared outside of a control
1465 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
1468 AcpiDump: Added support for dumping all SSDTs on newer versions of
1469 Windows. These tables are now easily available -- SSDTs are not available
1470 through the registry on older versions.
1472 ----------------------------------------
1473 27 May 2016. Summary of changes for version 20160527:
1476 1) ACPICA kernel-resident subsystem:
1478 Temporarily reverted the new arbitrary bit length/alignment support in
1479 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
1480 a number of regressions with the new code that need to be fully resolved
1481 and tested before this support can be finally integrated into ACPICA.
1482 Apologies for any inconveniences these issues may have caused.
1484 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
1485 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
1486 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
1488 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
1489 option. Adds a new return macro, return_STR. Junk-uk Kim.
1491 Example Code and Data Size: These are the sizes for the OS-independent
1492 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1493 debug version of the code includes the debug output trace mechanism and
1494 has a much larger code and data size.
1497 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
1498 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1500 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1501 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
1503 ----------------------------------------
1504 22 April 2016. Summary of changes for version 20160422:
1506 1) ACPICA kernel-resident subsystem:
1508 Fixed a regression in the GAS (generic address structure) arbitrary bit
1509 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
1510 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
1512 ACPI 6.0: Added support for new/renamed resource macros. One new argument
1513 was added to each of these macros, and the original name has been
1514 deprecated. The AML disassembler will always disassemble to the new
1515 names. Support for the new macros was added to iASL, disassembler,
1516 resource manager, and the acpihelp utility. ACPICA BZ 1274.
1518 I2cSerialBus -> I2cSerialBusV2
1519 SpiSerialBus -> SpiSerialBusV2
1520 UartSerialBus -> UartSerialBusV2
1522 ACPI 6.0: Added support for a new integer field that was appended to the
1523 package object returned by the _BIX method. This adds iASL compile-time
1524 and AML runtime error checking. ACPICA BZ 1273.
1526 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
1527 Subspace Type2" (Headers, Disassembler, and data table compiler).
1529 Example Code and Data Size: These are the sizes for the OS-independent
1530 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1531 debug version of the code includes the debug output trace mechanism and
1532 has a much larger code and data size.
1535 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1536 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1538 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1539 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1542 2) iASL Compiler/Disassembler and Tools:
1544 iASL: Implemented an ASL grammar extension to allow/enable executable
1545 "module-level code" to be created and executed under the various
1546 operators that create new scopes. This type of AML code is already
1547 supported in all known AML interpreters, and the grammar change will
1548 appear in the next version of the ACPI specification. Simplifies the
1549 conditional runtime creation of named objects under these object types:
1557 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
1558 ease-of-use to the ASL language. The syntax is similar to the
1559 corresponding C operator, and is implemented with the existing AML While
1560 opcode -- thus requiring no changes to existing AML interpreters.
1562 For (Initialize, Predicate, Update) {TermList}
1567 Initializer // Nothing | TermArg => ComputationalData
1568 Predicate // Nothing | TermArg => ComputationalData
1569 Update // Nothing | TermArg => ComputationalData
1573 iASL: The _HID/_ADR detection and validation has been enhanced to search
1574 under conditionals in order to allow these objects to be conditionally
1577 iASL: Fixed several issues with the constant folding feature. The
1578 improvement allows better detection and resolution of statements that can
1579 be folded at compile time. ACPICA BZ 1266.
1581 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
1582 conversion to the ASL ElseIf operator where incorrect ASL code could be
1585 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
1586 sometimes an extra (and extraneous) set of parentheses were emitted for
1587 some combinations of operators. Although this did not cause any problems
1588 with recompilation of the disassembled code, it made the code more
1589 difficult to read. David Box. ACPICA BZ 1231.
1591 iASL: Changed to ignore the unreferenced detection for predefined names
1592 of resource descriptor elements, when the resource descriptor is
1593 created/defined within a control method.
1595 iASL: Disassembler: Fix a possible fault with externally declared Buffer
1598 ----------------------------------------
1599 18 March 2016. Summary of changes for version 20160318:
1601 1) ACPICA kernel-resident subsystem:
1603 Added support for arbitrary bit lengths and bit offsets for registers
1604 defined by the Generic Address Structure. Previously, only aligned bit
1605 lengths of 8/16/32/64 were supported. This was sufficient for many years,
1606 but recently some machines have been seen that require arbitrary bit-
1607 level support. ACPICA BZ 1240. Lv Zheng.
1609 Fixed an issue where the \_SB._INI method sometimes must be evaluated
1610 before any _REG methods are evaluated. Lv Zheng.
1612 Implemented several changes related to ACPI table support
1613 (Headers/Disassembler/TableCompiler):
1614 NFIT: For ACPI 6.1, updated to add some additional new fields and
1616 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
1618 DMAR: Added new constants per the 10/2014 DMAR spec.
1619 IORT: Added new subtable per the 10/2015 IORT spec.
1620 HEST: For ACPI 6.1, added new constants and new subtable.
1621 DBG2: Added new constants per the 12/2015 DBG2 spec.
1622 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
1624 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
1626 Updated header support for the DMAR table to match the current version of
1629 Added extensions to the ASL Concatenate operator to allow any ACPI object
1630 to be passed as an operand. Any object other than Integer/String/Buffer
1631 simply returns a string containing the object type. This extends the
1632 usefulness of the Printf macros. Previously, Concatenate would abort the
1633 control method if a non-data object was encountered.
1635 ACPICA source code: Deployed the C "const" keyword across the source code
1636 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
1638 Example Code and Data Size: These are the sizes for the OS-independent
1639 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1640 debug version of the code includes the debug output trace mechanism and
1641 has a much larger code and data size.
1644 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1645 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1647 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1648 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
1651 2) iASL Compiler/Disassembler and Tools:
1653 iASL/Disassembler: Improved the heuristic used to determine the number of
1654 arguments for an externally defined control method (a method in another
1655 table). Although this is an improvement, there is no deterministic way to
1656 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
1657 will completely solve this problem as it is deployed (automatically) in
1660 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
1661 statements that could cause errors when the disassembled file is
1662 compiled. ACPICA BZ 1243. David Box.
1664 iASL: Fixed a regression caused by the merger of the two versions of the
1665 local strtoul64. Because of a dependency on a global variable, strtoul64
1666 could return an error for integers greater than a 32-bit value. ACPICA BZ
1669 iASL: Fixed a regression where a fault could occur for an ASL Return
1670 statement if it invokes a control method that is not resolved. ACPICA BZ
1673 AcpiXtract: Improved input file validation: detection of binary files and
1674 non-acpidump text files.
1676 ----------------------------------------
1677 12 February 2016. Summary of changes for version 20160212:
1679 1) ACPICA kernel-resident subsystem:
1681 Implemented full support for the ACPI 6.1 specification (released in
1682 January). This version of the specification is available at:
1683 http://www.uefi.org/specifications
1685 Only a relatively small number of changes were required in ACPICA to
1686 support ACPI 6.1, in these areas:
1687 - New predefined names
1689 - A new subtable for HEST
1690 - A few other header changes for new values
1692 Ensure \_SB_._INI is executed before any _REG methods are executed. There
1693 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
1695 Reverted a change made in version 20151218 which enabled method
1696 invocations to be targets of various ASL operators (SuperName and Target
1697 grammar elements). While the new behavior is supported by the ACPI
1698 specification, other AML interpreters do not support this behavior and
1699 never will. The ACPI specification will be updated for ACPI 6.2 to remove
1700 this support. Therefore, the change was reverted to the original ACPICA
1703 ACPICA now supports the GCC 6 compiler.
1705 Current Release: (Note: build changes increased sizes)
1706 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1707 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
1709 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
1710 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
1713 2) iASL Compiler/Disassembler and Tools:
1715 Completed full support for the ACPI 6.0 External() AML opcode. The
1716 compiler emits an external AML opcode for each ASL External statement.
1717 This opcode is used by the disassembler to assist with the disassembly of
1718 external control methods by specifying the required number of arguments
1719 for the method. AML interpreters do not use this opcode. To ensure that
1720 interpreters do not even see the opcode, a block of one or more external
1721 opcodes is surrounded by an "If(0)" construct. As this feature becomes
1722 commonly deployed in BIOS code, the ability of disassemblers to correctly
1723 disassemble AML code will be greatly improved. David Box.
1725 iASL: Implemented support for an optional cross-reference output file.
1726 The -lx option will create a the cross-reference file with the suffix
1727 "xrf". Three different types of cross-reference are created in this file:
1728 - List of object references made from within each control method
1729 - Invocation (caller) list for each user-defined control method
1730 - List of references to each non-method object in the namespace
1732 iASL: Method invocations as ASL Target operands are now disallowed and
1733 flagged as errors in preparation for ACPI 6.2 (see the description of the
1736 ----------------------------------------
1737 8 January 2016. Summary of changes for version 20160108:
1739 1) ACPICA kernel-resident subsystem:
1741 Updated all ACPICA copyrights and signons to 2016: Added the 2016
1742 copyright to all source code module headers and utility/tool signons.
1743 This includes the standard Linux dual-license header. This affects
1744 virtually every file in the ACPICA core subsystem, iASL compiler, all
1745 ACPICA utilities, and the ACPICA test suite.
1747 Fixed a regression introduced in version 20151218 concerning the
1748 execution of so-called module-level ASL/AML code. Namespace objects
1749 created under a module-level If() construct were not properly/fully
1750 entered into the namespace and could cause an interpreter fault when
1753 Example Code and Data Size: These are the sizes for the OS-independent
1754 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1755 debug version of the code includes the debug output trace mechanism and
1756 has a much larger code and data size.
1759 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
1760 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
1762 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
1763 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
1766 2) iASL Compiler/Disassembler and Tools:
1768 Fixed a problem with the compilation of the GpioIo and GpioInt resource
1769 descriptors. The _PIN field name was incorrectly defined to be an array
1770 of 32-bit values, but the _PIN values are in fact 16 bits each. This
1771 would cause incorrect bit width warnings when using Word (16-bit) fields
1772 to access the descriptors.
1775 ----------------------------------------
1776 18 December 2015. Summary of changes for version 20151218:
1778 1) ACPICA kernel-resident subsystem:
1780 Implemented per-AML-table execution of "module-level code" as individual
1781 ACPI tables are loaded into the namespace during ACPICA initialization.
1782 In other words, any module-level code within an AML table is executed
1783 immediately after the table is loaded, instead of batched and executed
1784 after all of the tables have been loaded. This provides compatibility
1785 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
1788 To fully support the feature above, the default operation region handlers
1789 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
1790 installed before any ACPI tables are loaded. This enables module-level
1791 code to access these address spaces during the table load and module-
1792 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
1795 Implemented several changes to the internal _REG support in conjunction
1796 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
1797 utilities for the changes above. Although these tools were changed, host
1798 operating systems that simply use the default handlers for SystemMemory,
1799 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
1801 For example, in the code below, DEV1 is conditionally added to the
1802 namespace by the DSDT via module-level code that accesses an operation
1803 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
1804 created immediately after the DSDT is loaded in order for the SSDT to
1805 successfully reference DEV1. Previously, this code would cause an
1806 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
1807 fully supported by ACPICA.
1809 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
1811 OperationRegion (OPR1, SystemMemory, 0x400, 32)
1812 Field (OPR1, AnyAcc, NoLock, Preserve)
1823 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
1825 External (\DEV1, DeviceObj)
1831 Fixed an AML interpreter problem where control method invocations were
1832 not handled correctly when the invocation was itself a SuperName argument
1833 to another ASL operator. In these cases, the method was not invoked.
1834 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
1839 Decrement, Increment
1842 Signal, Release, Reset
1845 Implemented automatic String-to-ObjectReference conversion support for
1846 packages returned by predefined names (such as _DEP). A common BIOS error
1847 is to add double quotes around an ObjectReference namepath, which turns
1848 the reference into an unexpected string object. This support detects the
1849 problem and corrects it before the package is returned to the caller that
1850 invoked the method. Lv Zheng.
1852 Implemented extensions to the Concatenate operator. Concatenate now
1853 accepts any type of object, it is not restricted to simply
1854 Integer/String/Buffer. For objects other than these 3 basic data types,
1855 the argument is treated as a string containing the name of the object
1856 type. This expands the utility of Concatenate and the Printf/Fprintf
1857 macros. ACPICA BZ 1222.
1859 Cleaned up the output of the ASL Debug object. The timer() value is now
1860 optional and no longer emitted by default. Also, the basic data types of
1861 Integer/String/Buffer are simply emitted as their values, without a data
1862 type string -- since the data type is obvious from the output. ACPICA BZ
1865 Example Code and Data Size: These are the sizes for the OS-independent
1866 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1867 debug version of the code includes the debug output trace mechanism and
1868 has a much larger code and data size.
1871 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
1872 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
1874 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
1875 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
1878 2) iASL Compiler/Disassembler and Tools:
1880 iASL: Fixed some issues with the ASL Include() operator. This operator
1881 was incorrectly defined in the iASL parser rules, causing a new scope to
1882 be opened for the code within the include file. This could lead to
1883 several issues, including allowing ASL code that is technically illegal
1884 and not supported by AML interpreters. Note, this does not affect the
1885 related #include preprocessor operator. ACPICA BZ 1212.
1887 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
1888 operator is essentially an ASL macro since there is no AML opcode
1889 associated with it. The code emitted by the iASL compiler for ElseIf is
1890 an Else opcode followed immediately by an If opcode. The disassembler
1891 will now emit an ElseIf if it finds an Else immediately followed by an
1892 If. This simplifies the decoded ASL, especially for deeply nested
1893 If..Else and large Switch constructs. Thus, the disassembled code more
1894 closely follows the original source ASL. ACPICA BZ 1211. Example:
1906 ElseIf (Arg0 == 0x02)
1911 AcpiExec: Added support for the new module level code behavior and the
1912 early region installation. This required a small change to the
1913 initialization, since AcpiExec must install its own operation region
1916 AcpiExec: Added support to make the debug object timer optional. Default
1917 is timer disabled. This cleans up the debug object output -- the timer
1918 data is rarely used.
1920 AcpiExec: Multiple ACPI tables are now loaded in the order that they
1921 appear on the command line. This can be important when there are
1922 interdependencies/references between the tables.
1924 iASL/Templates. Add support to generate template files with multiple
1925 SSDTs within a single output file. Also added ommand line support to
1926 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
1930 ----------------------------------------
1931 24 November 2015. Summary of changes for version 20151124:
1933 1) ACPICA kernel-resident subsystem:
1935 Fixed a possible regression for a previous update to FADT handling. The
1936 FADT no longer has a fixed table ID, causing some issues with code that
1937 was hardwired to a specific ID. Lv Zheng.
1939 Fixed a problem where the method auto-serialization could interfere with
1940 the current SyncLevel. This change makes the auto-serialization support
1941 transparent to the SyncLevel support and management.
1943 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
1944 interface is intended for early access to the namespace during the
1945 initial namespace device discovery walk. The _SUB method has been seen to
1946 access operation regions in some cases, causing errors because the
1947 operation regions are not fully initialized.
1949 AML Debugger: Fixed some issues with the terminate/quit/exit commands
1950 that can cause faults. Lv Zheng.
1952 AML Debugger: Add thread ID support so that single-step mode only applies
1953 to the AML Debugger thread. This prevents runtime errors within some
1956 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
1957 methods that are invoked by this interface are optional, removed warnings
1958 emitted for the case where one or more of these methods do not exist.
1959 ACPICA BZ 1208, original change by Prarit Bhargava.
1961 Made a major pass through the entire ACPICA source code base to
1962 standardize formatting that has diverged a bit over time. There are no
1963 functional changes, but this will of course cause quite a few code
1964 differences from the previous ACPICA release.
1966 Example Code and Data Size: These are the sizes for the OS-independent
1967 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1968 debug version of the code includes the debug output trace mechanism and
1969 has a much larger code and data size.
1972 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
1973 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
1975 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
1976 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
1979 2) iASL Compiler/Disassembler and Tools:
1981 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
1982 definition blocks within a single ASL file and the resulting AML file.
1983 Support for this type of file was also added to the various tools that
1984 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
1985 example code below shows two definition blocks within the same file:
1987 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
1991 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
1995 iASL: Enhanced typechecking for the Name() operator. All expressions for
1996 the value of the named object must be reduced/folded to a single constant
1997 at compile time, as per the ACPI specification (the AML definition of
2000 iASL: Fixed some code indentation issues for the -ic and -ia options (C
2001 and assembly headers). Now all emitted code correctly begins in column 1.
2003 iASL: Added an error message for an attempt to open a Scope() on an
2004 object defined in an SSDT. The DSDT is always loaded into the namespace
2005 first, so any attempt to open a Scope on an SSDT object will fail at
2009 ----------------------------------------
2010 30 September 2015. Summary of changes for version 20150930:
2012 1) ACPICA kernel-resident subsystem:
2014 Debugger: Implemented several changes and bug fixes to assist support for
2015 the in-kernel version of the AML debugger. Lv Zheng.
2016 - Fix the "predefined" command for in-kernel debugger.
2017 - Do not enter debug command loop for the help and version commands.
2018 - Disallow "execute" command during execution/single-step of a method.
2020 Interpreter: Updated runtime typechecking for all operators that have
2021 target operands. The operand is resolved and validated that it is legal.
2022 For example, the target cannot be a non-data object such as a Device,
2023 Mutex, ThermalZone, etc., as per the ACPI specification.
2025 Debugger: Fixed the double-mutex user I/O handshake to work when local
2026 deadlock detection is enabled.
2028 Debugger: limited display of method locals and arguments (LocalX and
2029 ArgX) to only those that have actually been initialized. This prevents
2030 lines of extraneous output.
2032 Updated the definition of the NFIT table to correct the bit polarity of
2033 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
2035 Example Code and Data Size: These are the sizes for the OS-independent
2036 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2037 debug version of the code includes the debug output trace mechanism and
2038 has a much larger code and data size.
2041 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2042 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2044 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2045 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2048 2) iASL Compiler/Disassembler and Tools:
2050 iASL: Improved the compile-time typechecking for operands of many of the
2053 -- Added an option to disable compiler operand/operator typechecking (-
2056 -- For the following operators, the TermArg operands are now validated
2057 when possible to be Integer data objects: BankField, OperationRegion,
2058 DataTableRegion, Buffer, and Package.
2060 -- Store (Source, Target): Both the source and target operands are
2061 resolved and checked that the operands are both legal. For example,
2062 neither operand can be a non-data object such as a Device, Mutex,
2063 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
2064 operator can be used to store an object to any type of target object.
2066 -- Store (Source, Target): If the source is a Package object, the target
2067 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
2068 is a Package, the source must also be a Package.
2070 -- Store (Source, Target): A warning is issued if the source and target
2071 resolve to the identical named object.
2073 -- Store (Source, <method invocation>): An error is generated for the
2074 target method invocation, as this construct is not supported by the AML
2077 -- For all ASL math and logic operators, the target operand must be a
2078 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
2079 includes the function return value also.
2081 -- External declarations are also included in the typechecking where
2082 possible. External objects defined using the UnknownObj keyword cannot be
2083 typechecked, however.
2085 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
2087 - Legacy code: Index(PKG1, 3)
2088 - New ASL+ code: PKG1[3]
2089 This completes the ACPI 6.0 ASL+ support as it was the only operator not
2092 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
2093 spaces were inadvertently appended to the filename, causing file access
2094 and deletion problems on some systems.
2096 ASL Test Suite (ASLTS): Updated the master makefile to generate all
2097 possible compiler output files when building the test suite -- thus
2098 exercising these features of the compiler. These files are automatically
2099 deleted when the test suite exits.
2102 ----------------------------------------
2103 18 August 2015. Summary of changes for version 20150818:
2105 1) ACPICA kernel-resident subsystem:
2107 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
2108 Zheng. ACPICA BZ 1186.
2110 Completed development to ensure that the ACPICA Disassembler and Debugger
2111 are fully standalone components of ACPICA. Removed cross-component
2112 dependences. Lv Zheng.
2114 The max-number-of-AML-loops is now runtime configurable (previously was
2115 compile-time only). This is essentially a loop timeout to force-abort
2116 infinite AML loops. ACPCIA BZ 1192.
2118 Debugger: Cleanup output to dump ACPI names and namepaths without any
2119 trailing underscores. Lv Zheng. ACPICA BZ 1135.
2121 Removed unnecessary conditional compilations across the Debugger and
2122 Disassembler components where entire modules could be left uncompiled.
2124 The aapits test is deprecated and has been removed from the ACPICA git
2125 tree. The test has never been completed and has not been maintained, thus
2126 becoming rather useless. ACPICA BZ 1015, 794.
2128 A batch of small changes to close bugzilla and other reports:
2129 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
2130 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
2131 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
2132 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
2134 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
2136 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
2138 - Debugger: Split debugger initialization/termination interfaces. Lv
2140 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
2142 - AcpiExec: Add debug message during _REG method phase during table
2144 - AcpiNames: Fix a regression where some output was missing and no longer
2146 - Debugger: General cleanup and simplification. Lv Zheng.
2147 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
2149 Example Code and Data Size: These are the sizes for the OS-independent
2150 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2151 debug version of the code includes the debug output trace mechanism and
2152 has a much larger code and data size.
2155 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2156 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2158 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2159 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2162 2) iASL Compiler/Disassembler and Tools:
2164 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
2165 were not handled properly and caused load errors. Now, properly invoke
2166 and use the ACPICA auto-reallocate mechanism for ACPI table data
2167 structures. ACPICA BZ 1188
2169 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
2172 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
2173 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
2174 executed during initialization. ACPICA BZ 1187, 1189.
2176 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
2177 that corresponds to each disassembled ASL statement, to simplify
2178 debugging. ACPICA BZ 1191.
2180 Debugger: Add option to the "objects" command to display a summary of the
2181 current namespace objects (Object type and count). This is displayed if
2182 the command is entered with no arguments.
2184 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
2187 ----------------------------------------
2188 17 July 2015. Summary of changes for version 20150717:
2190 1) ACPICA kernel-resident subsystem:
2192 Improved the partitioning between the Debugger and Disassembler
2193 components. This allows the Debugger to be used standalone within kernel
2194 code without the Disassembler (which is used for single stepping also).
2195 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
2197 Debugger: Implemented a new command to trace the execution of control
2198 methods (Trace). This is especially useful for the in-kernel version of
2199 the debugger when file I/O may not be available for method trace output.
2200 See the ACPICA reference for more information. Lv Zheng.
2202 Moved all C library prototypes (used for the local versions of these
2203 functions when requested) to a new header, acclib.h
2204 Cleaned up the use of non-ANSI C library functions. These functions are
2205 implemented locally in ACPICA. Moved all such functions to a common
2206 source file, utnonansi.c
2208 Debugger: Fixed a problem with the "!!" command (get last command
2209 executed) where the debugger could enter an infinite loop and eventually
2212 Removed the use of local macros that were used for some of the standard C
2213 library functions to automatically cast input parameters. This mostly
2214 affected the is* functions where the input parameter is defined to be an
2215 int. This required a few modifications to the main ACPICA source code to
2216 provide casting for these functions and eliminate possible compiler
2217 warnings for these parameters.
2219 Across the source code, added additional status/error checking to resolve
2220 issues discovered by static source code analysis tools such as Coverity.
2222 Example Code and Data Size: These are the sizes for the OS-independent
2223 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2224 debug version of the code includes the debug output trace mechanism and
2225 has a much larger code and data size.
2228 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2229 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2231 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2232 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2235 2) iASL Compiler/Disassembler and Tools:
2237 iASL: Fixed a regression where the device map file feature no longer
2238 worked properly when used in conjunction with the disassembler. It only
2239 worked properly with the compiler itself.
2241 iASL: Implemented a new warning for method LocalX variables that are set
2242 but never used (similar to a C compiler such as gcc). This also applies
2243 to ArgX variables that are not defined by the parent method, and are
2244 instead (legally) used as local variables.
2246 iASL/Preprocessor: Finished the pass-through of line numbers from the
2247 preprocessor to the compiler. This ensures that compiler errors/warnings
2248 have the correct original line numbers and filenames, regardless of any
2251 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
2252 pass-through of comments to the preprocessor output file (which becomes
2253 the compiler input file). Also fixed a problem with // comments that
2254 appear after a math expression.
2256 iASL: Added support for the TCPA server table to the table compiler and
2257 template generator. (The client table was already previously supported)
2259 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
2260 identify the iASL compiler.
2262 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
2263 multiple times. The new names are ACPI_SIGN_NEGATIVE and
2266 AcpiHelp: Update to expand help messages for the iASL preprocessor
2270 ----------------------------------------
2271 19 June 2015. Summary of changes for version 20150619:
2273 Two regressions in version 20150616 have been addressed:
2275 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
2276 etc.) This update changes ACPICA to only use the standard headers for
2277 functions, or the prototypes for the local versions of the C library
2278 functions. Across the source code, this required some additional casts
2279 for some Clib invocations for portability. Moved all local prototypes to
2280 a new file, acclib.h
2282 Fixes several problems with recent changes to the handling of the FACS
2283 table that could cause some systems not to boot.
2286 ----------------------------------------
2287 16 June 2015. Summary of changes for version 20150616:
2290 1) ACPICA kernel-resident subsystem:
2292 Across the entire ACPICA source code base, the various macros for the C
2293 library functions (such as ACPI_STRLEN, etc.) have been removed and
2294 replaced by the standard C library names (strlen, etc.) The original
2295 purpose for these macros is no longer applicable. This simplification
2296 reduces the number of macros used in the ACPICA source code
2297 significantly, improving readability and maintainability.
2299 Implemented support for a new ACPI table, the OSDT. This table, the
2300 "override" SDT, can be loaded directly by the host OS at boot time. It
2301 enables the replacement of existing namespace objects that were installed
2302 via the DSDT and/or SSDTs. The primary purpose for this is to replace
2303 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
2304 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
2307 Added support for systems with (improperly) two FACS tables -- a "32-bit"
2308 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
2309 X field). This change will support both automatically. There continues to
2310 be systems found with this issue. This support requires a change to the
2311 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
2312 been added to allow the host to select which FACS is desired
2313 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
2316 Added a new feature to allow for systems that do not contain an FACS.
2317 Although this is already supported on hardware-reduced platforms, the
2318 feature has been extended for all platforms. The reasoning is that we do
2319 not want to abort the entire ACPICA initialization just because the
2320 system is seriously buggy and has no FACS.
2322 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
2323 not correctly transcribed from the ACPI specification in ACPICA version
2326 Implemented support for the _CLS object in the AcpiGetObjectInfo external
2329 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
2330 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
2331 compiler also updated. Note: The TCPA "server" table is not supported by
2332 the disassembler/table-compiler at this time.
2334 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
2336 Example Code and Data Size: These are the sizes for the OS-independent
2337 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2338 debug version of the code includes the debug output trace mechanism and
2339 has a much larger code and data size.
2342 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2343 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2345 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2346 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2349 2) iASL Compiler/Disassembler and Tools:
2351 Disassembler: Fixed a problem with the new symbolic operator disassembler
2352 where incorrect ASL code could be emitted in some cases for the "non-
2353 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
2354 ShiftRight. The actual problem cases seem to be rather unusual in common
2355 ASL code, however. David Box.
2357 Modified the linux version of acpidump to obtain ACPI tables from not
2358 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
2361 iASL: Fixed a problem where the user preprocessor output file (.i)
2362 contained extra data that was not expected. The compiler was using this
2363 file as a temporary file and passed through #line directives in order to
2364 keep compiler error messages in sync with the input file and line number
2365 across multiple include files. The (.i) is no longer a temporary file as
2366 the compiler uses a new, different file for the original purpose.
2368 iASL: Fixed a problem where comments within the original ASL source code
2369 file were not passed through to the preprocessor output file, nor any
2372 iASL: Fixed some issues for the handling of the "#include" preprocessor
2373 directive and the similar (but not the same) "Include" ASL operator.
2375 iASL: Add support for the new OSDT in both the disassembler and compiler.
2377 iASL: Fixed a problem with the constant folding support where a Buffer
2378 object could be incorrectly generated (incorrectly formed) during a
2379 conversion to a Store() operator.
2381 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
2382 description text for the _REV predefined name. _REV now permanently
2383 returns 2, as per the ACPI 6.0 specification.
2385 Debugger: Enhanced the output of the Debug ASL object for references
2386 produced by the Index operator. For Buffers and strings, only output the
2387 actual byte pointed to by the index. For packages, only print the single
2388 package element decoded by the index. Previously, the entire
2389 buffer/string/package was emitted.
2391 iASL/Table-compiler: Fixed a regression where the "generic" data types
2392 were no longer recognized, causing errors.
2395 ----------------------------------------
2396 15 May 2015. Summary of changes for version 20150515:
2398 This release implements most of ACPI 6.0 as described below.
2400 1) ACPICA kernel-resident subsystem:
2402 Implemented runtime argument checking and return value checking for all
2403 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
2404 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
2406 Example Code and Data Size: These are the sizes for the OS-independent
2407 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2408 debug version of the code includes the debug output trace mechanism and
2409 has a much larger code and data size.
2412 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2413 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2415 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2416 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2419 2) iASL Compiler/Disassembler and Tools:
2421 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
2422 names (argument count validation and return value typechecking.)
2424 iASL disassembler and table compiler: implemented support for all new
2425 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
2427 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
2430 iASL preprocessor: Added a new directive to enable inclusion of binary
2431 blobs into ASL code. The new directive is #includebuffer. It takes a
2432 binary file as input and emits a named ascii buffer object into the ASL
2435 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
2437 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
2440 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
2444 ----------------------------------------
2445 10 April 2015. Summary of changes for version 20150410:
2447 Reverted a change introduced in version 20150408 that caused
2448 a regression in the disassembler where incorrect operator
2449 symbols could be emitted.
2452 ----------------------------------------
2453 08 April 2015. Summary of changes for version 20150408:
2456 1) ACPICA kernel-resident subsystem:
2458 Permanently set the return value for the _REV predefined name. It now
2459 returns 2 (was 5). This matches other ACPI implementations. _REV will be
2460 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
2461 for ACPI 2.0 and later. It should never be used to differentiate or
2462 identify operating systems.
2464 Added the "Windows 2015" string to the _OSI support. ACPICA will now
2465 return TRUE to a query with this string.
2467 Fixed several issues with the local version of the printf function.
2469 Added the C99 compiler option (-std=c99) to the Unix makefiles.
2472 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
2473 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
2475 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2476 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2479 2) iASL Compiler/Disassembler and Tools:
2481 iASL: Implemented an enhancement to the constant folding feature to
2482 transform the parse tree to a simple Store operation whenever possible:
2483 Add (2, 3, X) ==> is converted to: Store (5, X)
2484 X = 2 + 3 ==> is converted to: Store (5, X)
2486 Updated support for the SLIC table (Software Licensing Description Table)
2487 in both the Data Table compiler and the disassembler. The SLIC table
2488 support now conforms to "Microsoft Software Licensing Tables (SLIC and
2489 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
2490 following the ACPI header is now defined to be "Proprietary Data", and as
2491 such, can only be entered or displayed as a hex data block.
2493 Implemented full support for the MSDM table as described in the document
2494 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
2495 following the ACPI header is defined to be "Proprietary Data", and can
2496 only be entered or displayed as a hex data block.
2498 Implemented the -Pn option for the iASL Table Compiler (was only
2499 implemented for the ASL compiler). This option disables the iASL
2502 Disassembler: For disassembly of Data Tables, added a comment field
2503 around the Ascii equivalent data that is emitted as part of the "Raw
2504 Table Data" block. This prevents the iASL Preprocessor from possible
2505 confusion if/when the table is compiled.
2507 Disassembler: Added an option (-df) to force the disassembler to assume
2508 that the table being disassembled contains valid AML. This feature is
2509 useful for disassembling AML files that contain ACPI signatures other
2510 than DSDT or SSDT (such as OEMx or other signatures).
2512 Changes for the EFI version of the tools:
2513 1) Fixed a build error/issue
2514 2) Fixed a cast warning
2516 iASL: Fixed a path issue with the __FILE__ operator by making the
2517 directory prefix optional within the internal SplitInputFilename
2520 Debugger: Removed some unused global variables.
2522 Tests: Updated the makefile for proper generation of the AAPITS suite.
2525 ----------------------------------------
2526 04 February 2015. Summary of changes for version 20150204:
2528 ACPICA kernel-resident subsystem:
2530 Updated all ACPICA copyrights and signons to 2014. Added the 2014
2531 copyright to all module headers and signons, including the standard Linux
2532 header. This affects virtually every file in the ACPICA core subsystem,
2533 iASL compiler, all ACPICA utilities, and the test suites.
2535 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
2536 A raw gpe handling mechanism was created to allow better handling of GPE
2537 storms that aren't easily managed by the normal handler. The raw handler
2538 allows disabling/renabling of the the GPE so that interrupt storms can be
2539 avoided in cases where events cannot be timely serviced. In this
2540 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
2541 GPE. This API will leave the reference counts undisturbed, thereby
2542 preventing unintentional clearing of the GPE when the intent in only to
2543 temporarily disable it. Raw handlers allow enabling and disabling of a
2544 GPE by removing GPE register locking. As such, raw handlers much provide
2545 their own locks while using GPE API's to protect access to GPE data
2549 Events: Always modify GPE registers under the GPE lock.
2550 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
2551 values. Reported as bug by joe.liu@apple.com.
2553 Unix makefiles: Separate option to disable optimizations and
2554 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
2555 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
2556 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
2557 errors when building ACPICA. This allows disabling the option without
2558 also having to disable optimazations.
2562 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2563 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
2566 --------------------------------------
2567 07 November 2014. Summary of changes for version 20141107:
2569 This release is available at https://acpica.org/downloads
2571 This release introduces and implements language extensions to ASL that
2572 provide support for symbolic ("C-style") operators and expressions. These
2573 language extensions are known collectively as ASL+.
2576 1) iASL Compiler/Disassembler and Tools:
2578 Disassembler: Fixed a problem with disassembly of the UartSerialBus
2579 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
2582 Disassembler: Fixed the Unicode macro support to add escape sequences.
2583 All non-printable ASCII values are emitted as escape sequences, as well
2584 as the standard escapes for quote and backslash. Ensures that the
2585 disassembled macro can be correctly recompiled.
2587 iASL: Added Printf/Fprintf macros for formatted output. These macros are
2588 translated to existing AML Concatenate and Store operations. Printf
2589 writes to the ASL Debug object. Fprintf allows the specification of an
2590 ASL name as the target. Only a single format specifier is required, %o,
2591 since the AML interpreter dynamically converts objects to the required
2594 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
2595 (Concatenate (Concatenate (Concatenate ("", Arg0),
2596 ": Unexpected value for "), Arg1), ", "), Arg2),
2597 " at line "), Arg3), Debug)
2599 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
2600 Arg0, Arg1, Arg2, Arg3)
2602 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
2603 ("", Arg1), ": "), Arg0), " Successful"), STR1)
2605 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
2607 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
2608 ASL parse tree before the AML code is generated. This allows blocks of
2609 ASL code to be removed in order to help locate and identify problem
2610 devices and/or code. David E. Box.
2612 AcpiExec: Added support (-fi) for an optional namespace object
2613 initialization file. This file specifies initial values for namespace
2614 objects as necessary for debugging and testing different ASL code paths
2615 that may be taken as a result of BIOS options.
2618 2) Overview of symbolic operator support for ASL (ASL+)
2619 -------------------------------------------------------
2621 As an extension to the ASL language, iASL implements support for symbolic
2622 (C-style) operators for math and logical expressions. This can greatly
2623 simplify ASL code as well as improve both readability and
2624 maintainability. These language extensions can exist concurrently with
2625 all legacy ASL code and expressions.
2627 The symbolic extensions are 100% compatible with existing AML
2628 interpreters, since no new AML opcodes are created. To implement the
2629 extensions, the iASL compiler transforms the symbolic expressions into
2630 the legacy ASL/AML equivalents at compile time.
2632 Full symbolic expressions are supported, along with the standard C
2633 precedence and associativity rules.
2635 Full disassembler support for the symbolic expressions is provided, and
2636 creates an automatic migration path for existing ASL code to ASL+ code
2637 via the disassembly process. By default, the disassembler now emits ASL+
2638 code with symbolic expressions. An option (-dl) is provided to force the
2639 disassembler to emit legacy ASL code if desired.
2641 Below is the complete list of the currently supported symbolic operators
2642 with examples. See the iASL User Guide for additional information.
2645 ASL+ Syntax Legacy ASL Equivalent
2646 ----------- ---------------------
2650 Z = X + Y Add (X, Y, Z)
2651 Z = X - Y Subtract (X, Y, Z)
2652 Z = X * Y Multiply (X, Y, Z)
2653 Z = X / Y Divide (X, Y, , Z)
2654 Z = X % Y Mod (X, Y, Z)
2655 Z = X << Y ShiftLeft (X, Y, Z)
2656 Z = X >> Y ShiftRight (X, Y, Z)
2657 Z = X & Y And (X, Y, Z)
2658 Z = X | Y Or (X, Y, Z)
2659 Z = X ^ Y Xor (X, Y, Z)
2664 // Logical operators
2666 (X == Y) LEqual (X, Y)
2667 (X != Y) LNotEqual (X, Y)
2668 (X < Y) LLess (X, Y)
2669 (X > Y) LGreater (X, Y)
2670 (X <= Y) LLessEqual (X, Y)
2671 (X >= Y) LGreaterEqual (X, Y)
2672 (X && Y) LAnd (X, Y)
2676 // Assignment and compound assignment operations
2679 X += Y Add (X, Y, X)
2680 X -= Y Subtract (X, Y, X)
2681 X *= Y Multiply (X, Y, X)
2682 X /= Y Divide (X, Y, , X)
2683 X %= Y Mod (X, Y, X)
2684 X <<= Y ShiftLeft (X, Y, X)
2685 X >>= Y ShiftRight (X, Y, X)
2686 X &= Y And (X, Y, X)
2688 X ^= Y Xor (X, Y, X)
2695 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
2696 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
2698 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
2700 And (MEMB, 0xFFFFFFF0, SRMB)
2701 Store (MEMB, Local2)
2702 Store (PDBM, Local1)
2703 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
2705 Or (PDBM, 0x02, PDBM)
2709 If (((R510 & 0x03FB) == 0x02E0) ||
2710 ((R520 & 0x03FB) == 0x02E0) ||
2711 ((R530 & 0x03FB) == 0x02E0) ||
2712 ((R540 & 0x03FB) == 0x02E0))
2714 SRMB = (MEMB & 0xFFFFFFF0)
2717 PDBM &= 0xFFFFFFFFFFFFFFF9
2723 Store (0x1234, Local1)
2724 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
2725 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
2726 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
2727 Store (Index (PKG1, 0x03), Local6)
2728 Store (Add (Local3, Local2), Debug)
2729 Add (Local1, 0x0F, Local2)
2730 Add (Local1, Multiply (Local2, Local3), Local2)
2731 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
2735 Local3 = (((Local1 + TEST) + 0x20) * Local2)
2736 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
2737 Local3 = (Local1 + (TEST + (0x20 * Local2)))
2738 Local6 = Index (PKG1, 0x03)
2739 Debug = (Local3 + Local2)
2740 Local2 = (Local1 + 0x0F)
2741 Local2 = (Local1 + (Local2 * Local3))
2742 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
2745 ----------------------------------------
2746 26 September 2014. Summary of changes for version 20140926:
2748 1) ACPICA kernel-resident subsystem:
2750 Updated the GPIO operation region handler interface (GeneralPurposeIo).
2751 In order to support GPIO Connection objects with multiple pins, along
2752 with the related Field objects, the following changes to the interface
2753 have been made: The Address is now defined to be the offset in bits of
2754 the field unit from the previous invocation of a Connection. It can be
2755 viewed as a "Pin Number Index" into the connection resource descriptor.
2756 The BitWidth is the exact bit width of the field. It is usually one bit,
2757 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
2758 additional information and examples.
2760 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
2761 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
2762 by the firmware), so that they cannot fire until they are enabled via
2763 AcpiUpdateAllGpes. Rafael J. Wysocki.
2765 Added a new return flag for the Event/GPE status interfaces --
2766 AcpiGetEventStatus and AcpiGetGpeStatus. The new
2767 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
2768 GPE currently has a handler associated with it, and can thus actually
2769 affect the system. Lv Zheng.
2771 Example Code and Data Size: These are the sizes for the OS-independent
2772 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2773 debug version of the code includes the debug output trace mechanism and
2774 has a much larger code and data size.
2777 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2778 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2780 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2781 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2783 2) iASL Compiler/Disassembler and Tools:
2785 iASL: Fixed a memory allocation/free regression introduced in 20140828
2786 that could cause the compiler to crash. This was introduced inadvertently
2787 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
2790 iASL: Removed two error messages that have been found to create false
2791 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
2792 1) Illegal forward reference within a method
2793 2) Illegal reference across two methods
2795 iASL: Implemented a new option (-lm) to create a hardware mapping file
2796 that summarizes all GPIO, I2C, SPI, and UART connections. This option
2797 works for both the compiler and disassembler. See the iASL compiler user
2798 guide for additional information and examples (section 6.4.6).
2800 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
2801 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
2802 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
2804 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
2805 unless STDIN is actually a terminal. Assists with batch-mode processing.
2808 Disassembler/AcpiHelp: Added another large group of recognized _HID
2812 ----------------------------------------
2813 28 August 2014. Summary of changes for version 20140828:
2815 1) ACPICA kernel-resident subsystem:
2817 Fixed a problem related to the internal use of the Timer() operator where
2818 a 64-bit divide could cause an attempted link to a double-precision math
2819 library. This divide is not actually necessary, so the code was
2820 restructured to eliminate it. Lv Zheng.
2822 ACPI 5.1: Added support for the runtime validation of the _DSD package
2823 (similar to the iASL support).
2825 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
2826 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
2828 Example Code and Data Size: These are the sizes for the OS-independent
2829 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2830 debug version of the code includes the debug output trace mechanism and
2831 has a much larger code and data size.
2834 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2835 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2837 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
2838 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
2840 2) iASL Compiler/Disassembler and Tools:
2842 AcpiExec: Fixed a problem on unix systems where the original terminal
2843 state was not always properly restored upon exit. Seen when using the -v
2844 option. ACPICA BZ 1104.
2846 iASL: Fixed a problem with the validation of the ranges/length within the
2847 Memory24 resource descriptor. There was a boundary condition when the
2848 range was equal to the (length -1) caused by the fact that these values
2849 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
2851 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
2853 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
2855 now supported properly.
2857 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
2858 in the disassembler, data table compiler, and table template generator.
2860 iASL: Added a requirement for Device() objects that one of either a _HID
2861 or _ADR must exist within the scope of a Device, as per the ACPI
2862 specification. Remove a similar requirement that was incorrectly in place
2863 for the _DSD object.
2865 iASL: Added error detection for illegal named references within control
2866 methods that would cause runtime failures. Now trapped as errors are: 1)
2867 References to objects within a non-parent control method. 2) Forward
2868 references (within a method) -- for control methods, AML interpreters use
2869 a one-pass parse of control methods. ACPICA BZ 1008.
2871 iASL: Added error checking for dependencies related to the _PSx power
2872 methods. ACPICA BZ 1029.
2873 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
2875 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
2878 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
2879 deploying the existing object and string caches and adding new caches for
2882 iASL: Split the huge parser source file into multiple subfiles to improve
2883 manageability. Generation now requires the M4 macro preprocessor, which
2884 is part of the Bison distribution on both unix and windows platforms.
2886 AcpiSrc: Fixed and removed all extraneous warnings generated during
2887 entire ACPICA source code scan and/or conversion.
2890 ----------------------------------------
2892 24 July 2014. Summary of changes for version 20140724:
2894 The ACPI 5.1 specification has been released and is available at:
2895 http://uefi.org/specs/access
2898 0) ACPI 5.1 support in ACPICA:
2900 ACPI 5.1 is fully supported in ACPICA as of this release.
2902 New predefined names. Support includes iASL and runtime ACPICA
2904 _CCA (Cache Coherency Attribute).
2905 _DSD (Device-Specific Data). David Box.
2907 Modifications to existing ACPI tables. Support includes headers, iASL
2908 Data Table compiler, disassembler, and the template generator.
2909 FADT - New fields and flags. Graeme Gregory.
2910 GTDT - One new subtable and new fields. Tomasz Nowicki.
2911 MADT - Two new subtables. Tomasz Nowicki.
2912 PCCT - One new subtable.
2915 New notification type for System Resource Affinity change events.
2918 1) ACPICA kernel-resident subsystem:
2920 Fixed a regression introduced in 20140627 where a fault can happen during
2921 the deletion of Alias AML namespace objects. The problem affected both
2922 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
2924 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
2925 simple mechanism to enable wake GPEs that have no associated handler or
2926 control method. Rafael Wysocki.
2928 Updated the AcpiEnableGpe interface to disallow the enable if there is no
2929 handler or control method associated with the particular GPE. This will
2930 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
2932 Updated GPE handling and dispatch by disabling the GPE before clearing
2933 the status bit for edge-triggered GPEs. Lv Zheng.
2935 Added Timer() support to the AML Debug object. The current timer value is
2936 now displayed with each invocation of (Store to) the debug object to
2937 enable simple generation of execution times for AML code (method
2938 execution for example.) ACPICA BZ 1093.
2940 Example Code and Data Size: These are the sizes for the OS-independent
2941 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2942 debug version of the code includes the debug output trace mechanism and
2943 has a much larger code and data size.
2946 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
2947 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
2949 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
2950 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
2953 2) iASL Compiler/Disassembler and Tools:
2955 Fixed an issue with the recently added local printf implementation,
2956 concerning width/precision specifiers that could cause incorrect output.
2957 Lv Zheng. ACPICA BZ 1094.
2959 Disassembler: Added support to detect buffers that contain UUIDs and
2960 disassemble them to an invocation of the ToUUID operator. Also emit
2961 commented descriptions of known ACPI-related UUIDs.
2963 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
2964 -u. Adds three new files.
2966 iASL: Update table compiler and disassembler for DMAR table changes that
2967 were introduced in September 2013. With assistance by David Woodhouse.
2969 ----------------------------------------
2970 27 June 2014. Summary of changes for version 20140627:
2972 1) ACPICA kernel-resident subsystem:
2974 Formatted Output: Implemented local versions of standard formatted output
2975 utilities such as printf, etc. Over time, it has been discovered that
2976 there are in fact many portability issues with printf, and the addition
2977 of this feature will fix/prevent these issues once and for all. Some
2978 known issues are summarized below:
2980 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
2981 for the Linux kernel and is %uI64 for some MSVC versions.
2982 2) Invoking printf consistently in a manner that is portable across both
2983 32-bit and 64-bit platforms is difficult at best in many situations.
2984 3) The output format for pointers varies from system to system (leading
2985 zeros especially), and leads to inconsistent output from ACPICA across
2987 4) Certain platform-specific printf formats may conflict with ACPICA use.
2988 5) If there is no local C library available, ACPICA now has local support
2991 -- To address these printf issues in a complete manner, ACPICA now
2992 directly implements a small subset of printf format specifiers, only
2993 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
2995 Implemented support for ACPICA generation within the EFI environment.
2996 Initially, the AcpiDump utility is supported in the UEFI shell
2997 environment. Lv Zheng.
2999 Added a new external interface, AcpiLogError, to improve ACPICA
3000 portability. This allows the host to redirect error messages from the
3001 ACPICA utilities. Lv Zheng.
3003 Added and deployed new OSL file I/O interfaces to improve ACPICA
3011 There are C library implementations of these functions in the new file
3012 service_layers/oslibcfs.c -- however, the functions can be implemented by
3013 the local host in any way necessary. Lv Zheng.
3015 Implemented a mechanism to disable/enable ACPI table checksum validation
3016 at runtime. This can be useful when loading tables very early during OS
3017 initialization when it may not be possible to map the entire table in
3018 order to compute the checksum. Lv Zheng.
3020 Fixed a buffer allocation issue for the Generic Serial Bus support.
3021 Originally, a fixed buffer length was used. This change allows for
3022 variable-length buffers based upon the protocol indicated by the field
3023 access attributes. Reported by Lan Tianyu. Lv Zheng.
3025 Fixed a problem where an object detached from a namespace node was not
3026 properly terminated/cleared and could cause a circular list problem if
3027 reattached. ACPICA BZ 1063. David Box.
3029 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
3031 Fixed a possible memory leak in an error return path within the function
3032 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
3034 Example Code and Data Size: These are the sizes for the OS-independent
3035 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3036 debug version of the code includes the debug output trace mechanism and
3037 has a much larger code and data size.
3040 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3041 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3043 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3044 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3047 2) iASL Compiler/Disassembler and Tools:
3049 Disassembler: Add dump of ASCII equivalent text within a comment at the
3050 end of each line of the output for the Buffer() ASL operator.
3052 AcpiDump: Miscellaneous changes:
3053 Fixed repetitive table dump in -n mode.
3054 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
3055 the ACPI 2.0 GUID fails.
3057 iASL: Fixed a problem where the compiler could fault if incorrectly given
3058 an acpidump output file as input. ACPICA BZ 1088. David Box.
3060 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
3061 they are invoked without any arguments.
3063 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
3064 1086. Colin Ian King.
3066 Disassembler: Cleaned up a block of code that extracts a parent Op
3067 object. Added a comment that explains that the parent is guaranteed to be
3068 valid in this case. ACPICA BZ 1069.
3071 ----------------------------------------
3072 24 April 2014. Summary of changes for version 20140424:
3074 1) ACPICA kernel-resident subsystem:
3076 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
3077 Some of these tables are known to contain a trailing NULL entry. Lv
3080 Removed an extraneous error message for the case where there are a large
3081 number of system GPEs (> 124). This was the "32-bit FADT register is too
3082 long to convert to GAS struct" message, which is irrelevant for GPEs
3083 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
3084 (limited capacity) GAS bit length. Also, several changes to ensure proper
3085 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
3088 Implemented and deployed additional configuration support for the public
3089 ACPICA external interfaces. Entire classes of interfaces can now be
3090 easily modified or configured out, replaced by stubbed inline functions
3091 by default. Lv Zheng.
3093 Moved all public ACPICA runtime configuration globals to the public
3094 ACPICA external interface file for convenience. Also, removed some
3095 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
3097 Documentation: Added a new section to the ACPICA reference describing the
3098 maximum number of GPEs that can be supported by the FADT-defined GPEs in
3099 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
3102 Example Code and Data Size: These are the sizes for the OS-independent
3103 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3104 debug version of the code includes the debug output trace mechanism and
3105 has a much larger code and data size.
3108 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3109 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3111 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3112 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3115 2) iASL Compiler/Disassembler and Tools:
3117 iASL and disassembler: Add full support for the LPIT table (Low Power
3118 Idle Table). Includes support in the disassembler, data table compiler,
3119 and template generator.
3122 1) Add option to force the use of the RSDT (over the XSDT).
3123 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
3125 iASL: Add check for predefined packages that are too large. For
3126 predefined names that contain subpackages, check if each subpackage is
3127 too large. (Check for too small already exists.)
3129 Debugger: Updated the GPE command (which simulates a GPE by executing the
3130 GPE code paths in ACPICA). The GPE device is now optional, and defaults
3131 to the GPE 0/1 FADT-defined blocks.
3133 Unix application OSL: Update line-editing support. Add additional error
3134 checking and take care not to reset terminal attributes on exit if they
3135 were never set. This should help guarantee that the terminal is always
3136 left in the previous state on program exit.
3139 ----------------------------------------
3140 25 March 2014. Summary of changes for version 20140325:
3142 1) ACPICA kernel-resident subsystem:
3144 Updated the auto-serialize feature for control methods. This feature
3145 automatically serializes all methods that create named objects in order
3146 to prevent runtime errors. The update adds support to ignore the
3147 currently executing AML SyncLevel when invoking such a method, in order
3148 to prevent disruption of any existing SyncLevel priorities that may exist
3149 in the AML code. Although the use of SyncLevels is relatively rare, this
3150 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
3151 appear on some machines starting with the 20140214 release.
3153 Added a new external interface to allow the host to install ACPI tables
3154 very early, before the namespace is even created. AcpiInstallTable gives
3155 the host additional flexibility for ACPI table management. Tables can be
3156 installed directly by the host as if they had originally appeared in the
3157 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
3158 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
3159 with additional internal restructuring and cleanup. See the ACPICA
3160 Reference for interface details. Lv Zheng.
3162 Added validation of the checksum for all incoming dynamically loaded
3163 tables (via external interfaces or via AML Load/LoadTable operators). Lv
3166 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
3167 and GPE handler removal. Restructured calls to eliminate possible race
3168 conditions. Lv Zheng.
3170 Added a warning for the use/execution of the ASL/AML Unload (table)
3171 operator. This will help detect and identify machines that use this
3172 operator if and when it is ever used. This operator has never been seen
3173 in the field and the usage model and possible side-effects of the drastic
3174 runtime action of a full table removal are unknown.
3176 Reverted the use of #pragma push/pop which was introduced in the 20140214
3177 release. It appears that push and pop are not implemented by enough
3178 compilers to make the use of this feature feasible for ACPICA at this
3179 time. However, these operators may be deployed in a future ACPICA
3182 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
3185 Source code generation:
3186 1) Disabled the use of the "strchr" macro for the gcc-specific
3187 generation. For some versions of gcc, this macro can periodically expose
3188 a compiler bug which in turn causes compile-time error(s).
3189 2) Added support for PPC64 compilation. Colin Ian King.
3191 Example Code and Data Size: These are the sizes for the OS-independent
3192 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3193 debug version of the code includes the debug output trace mechanism and
3194 has a much larger code and data size.
3197 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3198 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3200 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3201 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3204 2) iASL Compiler/Disassembler and Tools:
3206 Disassembler: Added several new features to improve the readability of
3207 the resulting ASL code. Extra information is emitted within comment
3208 fields in the ASL code:
3209 1) Known _HID/_CID values are decoded to descriptive text.
3210 2) Standard values for the Notify() operator are decoded to descriptive
3212 3) Target operands are expanded to full pathnames (in a comment) when
3215 Disassembler: Miscellaneous updates for extern() handling:
3216 1) Abort compiler if file specified by -fe option does not exist.
3217 2) Silence unnecessary warnings about argument count mismatches.
3218 3) Update warning messages concerning unresolved method externals.
3219 4) Emit "UnknownObj" keyword for externals whose type cannot be
3223 1) Added the -a option to display both the ASL syntax and the AML
3224 encoding for an input ASL operator. This effectively displays all known
3225 information about an ASL operator with one AcpiHelp invocation.
3226 2) Added substring match support (similar to a wildcard) for the -i
3227 (_HID/PNP IDs) option.
3229 iASL/Disassembler: Since this tool does not yet support execution on big-
3230 endian machines, added detection of endianness and an error message if
3231 execution is attempted on big-endian. Support for big-endian within iASL
3232 is a feature that is on the ACPICA to-be-done list.
3235 1) Remove option to extract binary files from an acpidump; this function
3236 is made obsolete by the AcpiXtract utility.
3237 2) General cleanup of open files and allocated buffers.
3240 ----------------------------------------
3241 14 February 2014. Summary of changes for version 20140214:
3243 1) ACPICA kernel-resident subsystem:
3245 Implemented a new mechanism to proactively prevent problems with ill-
3246 behaved reentrant control methods that create named ACPI objects. This
3247 behavior is illegal as per the ACPI specification, but is nonetheless
3248 frequently seen in the field. Previously, this could lead to an
3249 AE_ALREADY_EXISTS exception if the method was actually entered by more
3250 than one thread. This new mechanism detects such methods at table load
3251 time and marks them "serialized" to prevent reentrancy. A new global
3252 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
3253 feature if desired. This mechanism and global option obsoletes and
3254 supersedes the previous AcpiGbl_SerializeAllMethods option.
3256 Added the "Windows 2013" string to the _OSI support. ACPICA will now
3257 respond TRUE to _OSI queries with this string. It is the stated policy of
3258 ACPICA to add new strings to the _OSI support as soon as possible after
3259 they are defined. See the full ACPICA _OSI policy which has been added to
3260 the utilities/utosi.c file.
3262 Hardened/updated the _PRT return value auto-repair code:
3263 1) Do not abort the repair on a single subpackage failure, continue to
3264 check all subpackages.
3265 2) Add check for the minimum subpackage length (4).
3266 3) Properly handle extraneous NULL package elements.
3268 Added support to avoid the possibility of infinite loops when traversing
3269 object linked lists. Never allow an infinite loop, even in the face of
3270 corrupted object lists.
3272 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
3273 pack(pop) directives to ensure that the ACPICA headers are independent of
3274 compiler settings or other host headers.
3276 Example Code and Data Size: These are the sizes for the OS-independent
3277 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3278 debug version of the code includes the debug output trace mechanism and
3279 has a much larger code and data size.
3282 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3283 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3285 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3286 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3289 2) iASL Compiler/Disassembler and Tools:
3291 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
3292 first reserved field was incorrectly forced to have a value of zero. This
3293 change correctly forces the field to have a value of one. ACPICA BZ 1081.
3295 Debugger: Added missing support for the "Extra" and "Data" subobjects
3296 when displaying object data.
3298 Debugger: Added support to display entire object linked lists when
3299 displaying object data.
3301 iASL: Removed the obsolete -g option to obtain ACPI tables from the
3302 Windows registry. This feature has been superseded by the acpidump
3306 ----------------------------------------
3307 14 January 2014. Summary of changes for version 20140114:
3309 1) ACPICA kernel-resident subsystem:
3311 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3312 copyright to all module headers and signons, including the standard Linux
3313 header. This affects virtually every file in the ACPICA core subsystem,
3314 iASL compiler, all ACPICA utilities, and the test suites.
3316 Improved parameter validation for AcpiInstallGpeBlock. Added the
3318 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
3319 2) There is not already a GPE block attached to the device.
3320 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
3323 Correctly support "references" in the ACPI_OBJECT. This change fixes the
3324 support to allow references (namespace nodes) to be passed as arguments
3325 to control methods via the evaluate object interface. This is probably
3326 most useful for testing purposes, however.
3328 Improved support for 32/64 bit physical addresses in printf()-like
3329 output. This change improves the support for physical addresses in printf
3330 debug statements and other output on both 32-bit and 64-bit hosts. It
3331 consistently outputs the appropriate number of bytes for each host. The
3332 %p specifier is unsatisfactory since it does not emit uniform output on
3333 all hosts/clib implementations (on some, leading zeros are not supported,
3334 leading to difficult-to-read output).
3336 Example Code and Data Size: These are the sizes for the OS-independent
3337 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3338 debug version of the code includes the debug output trace mechanism and
3339 has a much larger code and data size.
3342 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3343 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3345 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3346 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3349 2) iASL Compiler/Disassembler and Tools:
3351 iASL: Fix a possible fault when using the Connection() operator. Fixes a
3352 problem if the parent Field definition for the Connection operator refers
3353 to an operation region that does not exist. ACPICA BZ 1064.
3355 AcpiExec: Load of local test tables is now optional. The utility has the
3356 capability to load some various tables to test features of ACPICA.
3357 However, there are enough of them that the output of the utility became
3358 confusing. With this change, only the required local tables are displayed
3359 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
3360 line specification. This makes the default output simler and easier to
3361 understand. The -el command line option restores the original behavior
3362 for testing purposes.
3364 AcpiExec: Added support for overlapping operation regions. This change
3365 expands the simulation of operation regions by supporting regions that
3366 overlap within the given address space. Supports SystemMemory and
3367 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
3369 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
3370 allows AcpiExec to simulate these address spaces, similar to the current
3371 support for SystemMemory and SystemIO.
3373 Debugger: Added new command to read/write/compare all namespace objects.
3374 The command "test objects" will exercise the entire namespace by writing
3375 new values to each data object, and ensuring that the write was
3376 successful. The original value is then restored and verified.
3378 Debugger: Added the "test predefined" command. This change makes this
3379 test public and puts it under the new "test" command. The test executes
3380 each and every predefined name within the current namespace.
3383 ----------------------------------------
3384 18 December 2013. Summary of changes for version 20131218:
3386 Global note: The ACPI 5.0A specification was released this month. There
3387 are no changes needed for ACPICA since this release of ACPI is an
3388 errata/clarification release. The specification is available at
3392 1) ACPICA kernel-resident subsystem:
3394 Added validation of the XSDT root table if it is present. Some older
3395 platforms contain an XSDT that is ill-formed or otherwise invalid (such
3396 as containing some or all entries that are NULL pointers). This change
3397 adds a new function to validate the XSDT before actually using it. If the
3398 XSDT is found to be invalid, ACPICA will now automatically fall back to
3399 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
3400 ACPICA and enhanced by Lv Zheng and Bob Moore.
3402 Added a runtime option to ignore the XSDT and force the use of the RSDT.
3403 This change adds a runtime option that will force ACPICA to use the RSDT
3404 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
3405 requires that an XSDT be used instead of the RSDT, the XSDT has been
3406 found to be corrupt or ill-formed on some machines. Lv Zheng.
3408 Added a runtime option to favor 32-bit FADT register addresses over the
3409 64-bit addresses. This change adds an option to favor 32-bit FADT
3410 addresses when there is a conflict between the 32-bit and 64-bit versions
3411 of the same register. The default behavior is to use the 64-bit version
3412 in accordance with the ACPI specification. This can now be overridden via
3413 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
3415 During the change above, the internal "Convert FADT" and "Verify FADT"
3416 functions have been merged to simplify the code, making it easier to
3417 understand and maintain. ACPICA BZ 933.
3419 Improve exception reporting and handling for GPE block installation.
3420 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
3421 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
3423 Added helper macros to extract bus/segment numbers from the HEST table.
3424 This change adds two macros to extract the encoded bus and segment
3425 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
3426 Betty Dall <betty.dall@hp.com>
3428 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
3429 by ACPICA. It is not a public macro, so it should have no effect on
3430 existing OSV code. Lv Zheng.
3432 Example Code and Data Size: These are the sizes for the OS-independent
3433 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3434 debug version of the code includes the debug output trace mechanism and
3435 has a much larger code and data size.
3438 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3439 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3441 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3442 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3445 2) iASL Compiler/Disassembler and Tools:
3447 Disassembler: Improved pathname support for emitted External()
3448 statements. This change adds full pathname support for external names
3449 that have been resolved internally by the inclusion of additional ACPI
3450 tables (via the iASL -e option). Without this change, the disassembler
3451 can emit multiple externals for the same object, or it become confused
3452 when the Scope() operator is used on an external object. Overall, greatly
3453 improves the ability to actually recompile the emitted ASL code when
3454 objects a referenced across multiple ACPI tables. Reported by Michael
3455 Tsirkin (mst@redhat.com).
3457 Tests/ASLTS: Updated functional control suite to execute with no errors.
3458 David Box. Fixed several errors related to the testing of the interpreter
3459 slack mode. Lv Zheng.
3461 iASL: Added support to detect names that are declared within a control
3462 method, but are unused (these are temporary names that are only valid
3463 during the time the method is executing). A remark is issued for these
3464 cases. ACPICA BZ 1022.
3466 iASL: Added full support for the DBG2 table. Adds full disassembler,
3467 table compiler, and template generator support for the DBG2 table (Debug
3470 iASL: Added full support for the PCCT table, update the table definition.
3471 Updates the PCCT table definition in the actbl3.h header and adds table
3472 compiler and template generator support.
3474 iASL: Added an option to emit only error messages (no warnings/remarks).
3475 The -ve option will enable only error messages, warnings and remarks are
3476 suppressed. This can simplify debugging when only the errors are
3477 important, such as when an ACPI table is disassembled and there are many
3478 warnings and remarks -- but only the actual errors are of real interest.
3480 Example ACPICA code (source/tools/examples): Updated the example code so
3481 that it builds to an actual working program, not just example code. Added
3482 ACPI tables and execution of an example control method in the DSDT. Added
3483 makefile support for Unix generation.
3486 ----------------------------------------
3487 15 November 2013. Summary of changes for version 20131115:
3489 This release is available at https://acpica.org/downloads
3492 1) ACPICA kernel-resident subsystem:
3494 Resource Manager: Fixed loop termination for the "get AML length"
3495 function. The loop previously had an error termination on a NULL resource
3496 pointer, which can never happen since the loop simply increments a valid
3497 resource pointer. This fix changes the loop to terminate with an error on
3498 an invalid end-of-buffer condition. The problem can be seen as an
3499 infinite loop by callers to AcpiSetCurrentResources with an invalid or
3500 corrupted resource descriptor, or a resource descriptor that is missing
3501 an END_TAG descriptor. Reported by Dan Carpenter
3502 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
3504 Table unload and ACPICA termination: Delete all attached data objects
3505 during namespace node deletion. This fix updates namespace node deletion
3506 to delete the entire list of attached objects (attached via
3507 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
3508 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
3510 ACPICA termination: Added support to delete all objects attached to the
3511 root namespace node. This fix deletes any and all objects that have been
3512 attached to the root node via AcpiAttachData. Previously, none of these
3513 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
3515 Debug output: Do not emit the function nesting level for the in-kernel
3516 build. The nesting level is really only useful during a single-thread
3517 execution. Therefore, only enable this output for the AcpiExec utility.
3518 Also, only emit the thread ID when executing under AcpiExec (Context
3519 switches are still always detected and a message is emitted). ACPICA BZ
3522 Example Code and Data Size: These are the sizes for the OS-independent
3523 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3524 debug version of the code includes the debug output trace mechanism and
3525 has a much larger code and data size.
3528 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3529 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3531 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3532 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3535 2) iASL Compiler/Disassembler and Tools:
3537 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
3538 correct portable POSIX header for terminal control functions.
3540 Disassembler: Fixed control method invocation issues related to the use
3541 of the CondRefOf() operator. The problem is seen in the disassembly where
3542 control method invocations may not be disassembled properly if the
3543 control method name has been used previously as an argument to CondRefOf.
3544 The solution is to not attempt to emit an external declaration for the
3545 CondRefOf target (it is not necessary in the first place). This prevents
3546 disassembler object type confusion. ACPICA BZ 988.
3548 Unix Makefiles: Added an option to disable compiler optimizations and the
3549 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
3550 with optimizations (reportedly, gcc 4.4 for example). This change adds a
3551 command line option for make (NOOPT) that disables all compiler
3552 optimizations and the _FORTIFY_SOURCE compiler flag. The default
3553 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
3554 1034. Lv Zheng, Bob Moore.
3556 Tests/ASLTS: Added options to specify individual test cases and modes.
3557 This allows testers running aslts.sh to optionally specify individual
3558 test modes and test cases. Also added an option to disable the forced
3559 generation of the ACPICA tools from source if desired. Lv Zheng.
3561 ----------------------------------------
3562 27 September 2013. Summary of changes for version 20130927:
3564 This release is available at https://acpica.org/downloads
3567 1) ACPICA kernel-resident subsystem:
3569 Fixed a problem with store operations to reference objects. This change
3570 fixes a problem where a Store operation to an ArgX object that contained
3572 reference to a field object did not complete the automatic dereference
3574 then write to the actual field object. Instead, the object type of the
3575 field object was inadvertently changed to match the type of the source
3576 operand. The new behavior will actually write to the field object (buffer
3577 field or field unit), thus matching the correct ACPI-defined behavior.
3579 Implemented support to allow the host to redefine individual OSL
3580 prototypes. This change enables the host to redefine OSL prototypes found
3581 in the acpiosxf.h file. This allows the host to implement OSL interfaces
3582 with a macro or inlined function. Further, it allows the host to add any
3583 additional required modifiers such as __iomem, __init, __exit, etc., as
3584 necessary on a per-interface basis. Enables maximum flexibility for the
3585 OSL interfaces. Lv Zheng.
3587 Hardcoded the access width for the FADT-defined reset register. The ACPI
3588 specification requires the reset register width to be 8 bits. ACPICA now
3589 hardcodes the width to 8 and ignores the FADT width value. This provides
3590 compatibility with other ACPI implementations that have allowed BIOS code
3591 with bad register width values to go unnoticed. Matthew Garett, Bob
3595 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
3597 in the OSL header (acpiosxf). The change modifies the position of this
3598 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
3599 build issues if the OSL defines the implementation of the interface to be
3600 an inline stub function. Lv Zheng.
3602 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
3603 initialization interfaces. This change adds a new macro for the main init
3604 and terminate external interfaces in order to support hosts that require
3605 additional or different processing for these functions. Changed from
3606 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
3609 Cleaned up the memory allocation macros for configurability. In the
3611 case, the ACPI_ALLOCATE and related macros now resolve directly to their
3612 respective AcpiOs* OSL interfaces. Two options:
3613 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
3614 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
3615 2) For AcpiExec (and for debugging), the macros can optionally be
3617 to the local ACPICA interfaces that track each allocation (local tracking
3618 is used to immediately detect memory leaks).
3621 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
3622 to predefine this macro to either TRUE or FALSE during the system build.
3624 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
3626 Example Code and Data Size: These are the sizes for the OS-independent
3627 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3628 debug version of the code includes the debug output trace mechanism and
3629 has a much larger code and data size.
3632 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3633 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3635 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
3636 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3639 2) iASL Compiler/Disassembler and Tools:
3641 iASL: Implemented wildcard support for the -e option. This simplifies use
3642 when there are many SSDTs that must be included to resolve external
3644 declarations. ACPICA BZ 1041. Example:
3645 iasl -e ssdt*.dat -d dsdt.dat
3647 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
3648 adds a portable module that implements full history and limited line
3649 editing for Unix and Linux systems. It does not use readline() due to
3650 portability issues. Instead it uses the POSIX termio interface to put the
3651 terminal in raw input mode so that the various special keys can be
3653 (such as up/down-arrow for history support and left/right-arrow for line
3654 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
3656 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
3657 one or more spaces. This provides compatible with early or different
3658 versions of the AcpiDump utility. ACPICA BZ 1044.
3660 AcpiDump: Do not ignore tables that contain only an ACPI table header.
3661 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
3662 no other data. This change adds support to dump these tables. Any tables
3663 shorter than the length of an ACPI table header remain in error (an error
3664 message is emitted). Reported by Yi Li.
3666 Debugger: Echo actual command along with the "unknown command" message.
3668 ----------------------------------------
3669 23 August 2013. Summary of changes for version 20130823:
3671 1) ACPICA kernel-resident subsystem:
3673 Implemented support for host-installed System Control Interrupt (SCI)
3674 handlers. Certain ACPI functionality requires the host to handle raw
3675 SCIs. For example, the "SCI Doorbell" that is defined for memory power
3676 state support requires the host device driver to handle SCIs to examine
3677 if the doorbell has been activated. Multiple SCI handlers can be
3678 installed to allow for future expansion. New external interfaces are
3679 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
3680 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
3682 Operation region support: Never locally free the handler "context"
3683 pointer. This change removes some dangerous code that attempts to free
3684 the handler context pointer in some (rare) circumstances. The owner of
3685 the handler owns this pointer and the ACPICA code should never touch it.
3686 Although not seen to be an issue in any kernel, it did show up as a
3687 problem (fault) under AcpiExec. Also, set the internal storage field for
3688 the context pointer to zero when the region is deactivated, simply for
3689 sanity. David Box. ACPICA BZ 1039.
3691 AcpiRead: On error, do not modify the return value target location. If an
3692 error happens in the middle of a split 32/32 64-bit I/O operation, do not
3693 modify the target of the return value pointer. Makes the code consistent
3694 with the rest of ACPICA. Bjorn Helgaas.
3696 Example Code and Data Size: These are the sizes for the OS-independent
3697 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3698 debug version of the code includes the debug output trace mechanism and
3699 has a much larger code and data size.
3702 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
3703 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3705 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
3706 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
3709 2) iASL Compiler/Disassembler and Tools:
3711 AcpiDump: Implemented several new features and fixed some problems:
3712 1) Added support to dump the RSDP, RSDT, and XSDT tables.
3713 2) Added support for multiple table instances (SSDT, UEFI).
3714 3) Added option to dump "customized" (overridden) tables (-c).
3715 4) Fixed a problem where some table filenames were improperly
3717 5) Improved some error messages, removed some unnecessary messages.
3719 iASL: Implemented additional support for disassembly of ACPI tables that
3720 contain invocations of external control methods. The -fe<file> option
3721 allows the import of a file that specifies the external methods along
3722 with the required number of arguments for each -- allowing for the
3723 correct disassembly of the table. This is a workaround for a limitation
3724 of AML code where the disassembler often cannot determine the number of
3725 arguments required for an external control method and generates incorrect
3726 ASL code. See the iASL reference for details. ACPICA BZ 1030.
3728 Debugger: Implemented a new command (paths) that displays the full
3729 pathnames (namepaths) and object types of all objects in the namespace.
3730 This is an alternative to the namespace command.
3732 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
3733 mechanism and any installed handlers.
3735 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
3736 This can occur if there are too many parent prefixes in a namepath (for
3737 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
3739 Application OSLs: Set the return value for the PCI read functions. These
3740 functions simply return AE_OK, but should set the return value to zero
3741 also. This change implements this. ACPICA BZ 1038.
3743 Debugger: Prevent possible command line buffer overflow. Increase the
3744 size of a couple of the debugger line buffers, and ensure that overflow
3745 cannot happen. ACPICA BZ 1037.
3747 iASL: Changed to abort immediately on serious errors during the parsing
3748 phase. Due to the nature of ASL, there is no point in attempting to
3749 compile these types of errors, and they typically end up causing a
3750 cascade of hundreds of errors which obscure the original problem.
3752 ----------------------------------------
3753 25 July 2013. Summary of changes for version 20130725:
3755 1) ACPICA kernel-resident subsystem:
3757 Fixed a problem with the DerefOf operator where references to FieldUnits
3758 and BufferFields incorrectly returned the parent object, not the actual
3759 value of the object. After this change, a dereference of a FieldUnit
3760 reference results in a read operation on the field to get the value, and
3761 likewise, the appropriate BufferField value is extracted from the target
3764 Fixed a problem where the _WAK method could cause a fault under these
3765 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
3766 method returned no value. The problem is rarely seen because most kernels
3767 run ACPICA in slack mode.
3769 For the DerefOf operator, a fatal error now results if an attempt is made
3770 to dereference a reference (created by the Index operator) to a NULL
3771 package element. Provides compatibility with other ACPI implementations,
3772 and this behavior will be added to a future version of the ACPI
3775 The ACPI Power Management Timer (defined in the FADT) is now optional.
3776 This provides compatibility with other ACPI implementations and will
3777 appear in the next version of the ACPI specification. If there is no PM
3778 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
3779 zero in the FADT indicates no PM timer.
3781 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
3782 allows the host to globally enable/disable all vendor strings, all
3783 feature strings, or both. Intended to be primarily used for debugging
3784 purposes only. Lv Zheng.
3786 Expose the collected _OSI data to the host via a global variable. This
3787 data tracks the highest level vendor ID that has been invoked by the BIOS
3788 so that the host (and potentially ACPICA itself) can change behaviors
3789 based upon the age of the BIOS.
3791 Example Code and Data Size: These are the sizes for the OS-independent
3792 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3793 debug version of the code includes the debug output trace mechanism and
3794 has a much larger code and data size.
3797 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
3798 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3800 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
3801 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
3804 2) iASL Compiler/Disassembler and Tools:
3806 iASL: Created the following enhancements for the -so option (create
3808 1)Add offsets for the last nameseg in each namepath for every supported
3810 2)Add support for Processor, Device, Thermal Zone, and Scope objects
3811 3)Add the actual AML opcode for the parent object of every supported
3813 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
3815 Disassembler: Emit all unresolved external symbols in a single block.
3816 These are external references to control methods that could not be
3817 resolved, and thus, the disassembler had to make a guess at the number of
3820 iASL: The argument to the -T option (create table template) is now
3821 optional. If not specified, the default table is a DSDT, typically the
3824 ----------------------------------------
3825 26 June 2013. Summary of changes for version 20130626:
3827 1) ACPICA kernel-resident subsystem:
3829 Fixed an issue with runtime repair of the _CST object. Null or invalid
3830 elements were not always removed properly. Lv Zheng.
3832 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
3833 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
3834 the maximum number of GPEs is 1016. Use of multiple GPE block devices
3835 makes the system-wide number of GPEs essentially unlimited.
3837 Example Code and Data Size: These are the sizes for the OS-independent
3838 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3839 debug version of the code includes the debug output trace mechanism and
3840 has a much larger code and data size.
3843 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
3844 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
3846 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
3847 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
3850 2) iASL Compiler/Disassembler and Tools:
3852 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
3853 hosts. Now supports Linux, FreeBSD, and Windows.
3855 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
3856 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
3858 iASL/Preprocessor: Implemented full support for nested
3859 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
3861 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
3862 max. The original purpose of this constraint was to limit the amount of
3863 debug output. However, the string function in question (UtPrintString) is
3864 now used for the disassembler also, where 256 bytes is insufficient.
3865 Reported by RehabMan@GitHub.
3867 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
3868 tables. ACPICA BZ 999. Lv Zheng.
3870 iASL: Fixed a couple of error exit issues that could result in a "Could
3871 not delete <file>" message during ASL compilation.
3873 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
3874 the actual signatures for these tables are "FACP" and "APIC",
3877 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
3878 tables are allowed to have multiple instances.
3880 ----------------------------------------
3881 17 May 2013. Summary of changes for version 20130517:
3883 1) ACPICA kernel-resident subsystem:
3885 Fixed a regression introduced in version 20130328 for _INI methods. This
3886 change fixes a problem introduced in 20130328 where _INI methods are no
3887 longer executed properly because of a memory block that was not
3888 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
3889 <tomasz.nowicki@linaro.org>.
3891 Fixed a possible problem with the new extended sleep registers in the
3893 5.0 FADT. Do not use these registers (even if populated) unless the HW-
3894 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
3897 Implemented return value repair code for _CST predefined objects: Sort
3899 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
3901 Implemented a debug-only option to disable loading of SSDTs from the
3902 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
3903 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
3904 acglobal.h - ACPICA BZ 1005. Lv Zheng.
3906 Fixed some issues in the ACPICA initialization and termination code:
3907 Tomasz Nowicki <tomasz.nowicki@linaro.org>
3908 1) Clear events initialized flag upon event component termination. ACPICA
3910 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
3911 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
3912 4) Clear debug buffer global on termination to prevent possible multiple
3913 delete. ACPICA BZ 1010.
3915 Standardized all switch() blocks across the entire source base. After
3917 years, different formatting for switch() had crept in. This change makes
3918 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
3920 Split some files to enhance ACPICA modularity and configurability:
3921 1) Split buffer dump routines into utilities/utbuffer.c
3922 2) Split internal error message routines into utilities/uterror.c
3923 3) Split table print utilities into tables/tbprint.c
3924 4) Split iASL command-line option processing into asloptions.c
3926 Makefile enhancements:
3927 1) Support for all new files above.
3928 2) Abort make on errors from any subcomponent. Chao Guan.
3929 3) Add build support for Apple Mac OS X. Liang Qi.
3931 Example Code and Data Size: These are the sizes for the OS-independent
3932 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3933 debug version of the code includes the debug output trace mechanism and
3934 has a much larger code and data size.
3937 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
3938 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
3940 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
3941 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
3944 2) iASL Compiler/Disassembler and Tools:
3946 New utility: Implemented an easily portable version of the acpidump
3947 utility to extract ACPI tables from the system (or a file) in an ASCII
3949 dump format. The top-level code implements the various command line
3950 options, file I/O, and table dump routines. To port to a new host, only
3951 three functions need to be implemented to get tables -- since this
3952 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
3953 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
3954 1) The Windows version obtains the ACPI tables from the Registry.
3955 2) The Linux version is under development.
3956 3) Other hosts - If an OS-dependent module is submitted, it will be
3957 distributed with ACPICA.
3959 iASL: Fixed a regression for -D preprocessor option (define symbol). A
3960 restructuring/change to the initialization sequence caused this option to
3961 no longer work properly.
3963 iASL: Implemented a mechanism to disable specific warnings and remarks.
3964 Adds a new command line option, "-vw <messageid> as well as "#pragma
3965 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
3967 iASL: Fix for too-strict package object validation. The package object
3968 validation for return values from the predefined names is a bit too
3969 strict, it does not allow names references within the package (which will
3970 be resolved at runtime.) These types of references cannot be validated at
3971 compile time. This change ignores named references within package objects
3972 for names that return or define static packages.
3974 Debugger: Fixed the 80-character command line limitation for the History
3975 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
3977 iASL: Added control method and package support for the -so option
3978 (generates AML offset table for BIOS support.)
3980 iASL: issue a remark if a non-serialized method creates named objects. If
3981 a thread blocks within the method for any reason, and another thread
3982 enters the method, the method will fail because an attempt will be made
3984 create the same (named) object twice. In this case, issue a remark that
3985 the method should be marked serialized. NOTE: may become a warning later.
3988 ----------------------------------------
3989 18 April 2013. Summary of changes for version 20130418:
3991 1) ACPICA kernel-resident subsystem:
3993 Fixed a possible buffer overrun during some rare but specific field unit
3994 read operations. This overrun can only happen if the DSDT version is 1 --
3995 meaning that all AML integers are 32 bits -- and the field length is
3996 between 33 and 55 bits long. During the read, an internal buffer object
3998 created for the field unit because the field is larger than an integer
4000 bits). However, in this case, the buffer will be incorrectly written
4001 beyond the end because the buffer length is less than the internal
4003 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
4004 long, but a full 8 bytes will be written.
4006 Updated the Embedded Controller "orphan" _REG method support. This refers
4007 to _REG methods under the EC device that have no corresponding operation
4008 region. This is allowed by the ACPI specification. This update removes a
4009 dependency on the existence an ECDT table. It will execute an orphan _REG
4010 method as long as the operation region handler for the EC is installed at
4011 the EC device node and not the namespace root. Rui Zhang (original
4012 update), Bob Moore (update/integrate).
4014 Implemented run-time argument typechecking for all predefined ACPI names
4015 (_STA, _BIF, etc.) This change performs object typechecking on all
4016 incoming arguments for all predefined names executed via
4017 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
4018 passing correct object types as well as the correct number of arguments
4019 (therefore identifying any issues immediately). Also, the ASL/namespace
4020 definition of the predefined name is checked against the ACPI
4021 specification for the proper argument count. Adds one new file,
4024 Changed an exception code for the ASL UnLoad() operator. Changed the
4025 exception code for the case where the input DdbHandle is invalid, from
4026 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
4028 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
4029 global makefile. The use of this flag causes compiler errors on earlier
4030 versions of GCC, so it has been removed for compatibility.
4032 Miscellaneous cleanup:
4033 1) Removed some unused/obsolete macros
4034 2) Fixed a possible memory leak in the _OSI support
4035 3) Removed an unused variable in the predefined name support
4036 4) Windows OSL: remove obsolete reference to a memory list field
4038 Example Code and Data Size: These are the sizes for the OS-independent
4039 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4040 debug version of the code includes the debug output trace mechanism and
4041 has a much larger code and data size.
4044 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4045 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4047 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4048 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4051 2) iASL Compiler/Disassembler and Tools:
4053 AcpiExec: Added installation of a handler for the SystemCMOS address
4054 space. This prevents control method abort if a method accesses this
4057 AcpiExec: Added support for multiple EC devices, and now install EC
4058 operation region handler(s) at the actual EC device instead of the
4059 namespace root. This reflects the typical behavior of host operating
4062 AcpiExec: Updated to ensure that all operation region handlers are
4063 installed before the _REG methods are executed. This prevents a _REG
4064 method from aborting if it accesses an address space has no handler.
4065 AcpiExec installs a handler for every possible address space.
4067 Debugger: Enhanced the "handlers" command to display non-root handlers.
4068 This change enhances the handlers command to display handlers associated
4069 with individual devices throughout the namespace, in addition to the
4070 currently supported display of handlers associated with the root
4074 ASL Test Suite: Several test suite errors have been identified and
4075 resolved, reducing the total error count during execution. Chao Guan.
4077 ----------------------------------------
4078 28 March 2013. Summary of changes for version 20130328:
4080 1) ACPICA kernel-resident subsystem:
4082 Fixed several possible race conditions with the internal object reference
4083 counting mechanism. Some of the external ACPICA interfaces update object
4084 reference counts without holding the interpreter or namespace lock. This
4085 change adds a spinlock to protect reference count updates on the internal
4086 ACPICA objects. Reported by and with assistance from Andriy Gapon
4089 FADT support: Removed an extraneous warning for very large GPE register
4090 sets. This change removes a size mismatch warning if the legacy length
4091 field for a GPE register set is larger than the 64-bit GAS structure can
4092 accommodate. GPE register sets can be larger than the 255-bit width
4093 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
4095 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
4096 return from this interface. Handles a possible timeout case if
4097 ACPI_WAIT_FOREVER is modified by the host to be a value less than
4098 "forever". Jung-uk Kim.
4100 Predefined name support: Add allowed/required argument type information
4102 the master predefined info table. This change adds the infrastructure to
4103 enable typechecking on incoming arguments for all predefined
4104 methods/objects. It does not actually contain the code that will fully
4105 utilize this information, this is still under development. Also condenses
4106 some duplicate code for the predefined names into a new module,
4107 utilities/utpredef.c
4109 Example Code and Data Size: These are the sizes for the OS-independent
4110 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4111 debug version of the code includes the debug output trace mechanism and
4112 has a much larger code and data size.
4115 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4116 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4118 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4119 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4122 2) iASL Compiler/Disassembler and Tools:
4124 iASL: Implemented a new option to simplify the development of ACPI-
4126 BIOS code. Adds support for a new "offset table" output file. The -so
4127 option will create a C table containing the AML table offsets of various
4128 named objects in the namespace so that BIOS code can modify them easily
4130 boot time. This can simplify BIOS runtime code by eliminating expensive
4131 searches for "magic values", enhancing boot times and adding greater
4132 reliability. With assistance from Lee Hamel.
4134 iASL: Allow additional predefined names to return zero-length packages.
4135 Now, all predefined names that are defined by the ACPI specification to
4136 return a "variable-length package of packages" are allowed to return a
4137 zero length top-level package. This allows the BIOS to tell the host that
4138 the requested feature is not supported, and supports existing BIOS/ASL
4141 iASL: Changed the "result not used" warning to an error. This is the case
4142 where an ASL operator is effectively a NOOP because the result of the
4143 operation is not stored anywhere. For example:
4145 There is no target (missing 3rd argument), nor is the function return
4146 value used. This is potentially a very serious problem -- since the code
4147 was probably intended to do something, but for whatever reason, the value
4148 was not stored. Therefore, this issue has been upgraded from a warning to
4151 AcpiHelp: Added allowable/required argument types to the predefined names
4152 info display. This feature utilizes the recent update to the predefined
4153 names table (above).
4155 ----------------------------------------
4156 14 February 2013. Summary of changes for version 20130214:
4158 1) ACPICA Kernel-resident Subsystem:
4160 Fixed a possible regression on some hosts: Reinstated the safe return
4161 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
4162 evaluated only once. Although these macros are not needed for the ACPICA
4163 code itself, they are often used by ACPI-related host device drivers
4165 the safe feature may be necessary.
4167 Fixed several issues related to the ACPI 5.0 reduced hardware support
4168 (SOC): Now ensure that if the platform declares itself as hardware-
4170 via the FADT, the following functions become NOOPs (and always return
4171 AE_OK) because ACPI is always enabled by definition on these machines:
4177 Dynamic Object Repair: Implemented additional runtime repairs for
4178 predefined name return values. Both of these repairs can simplify code in
4179 the related device drivers that invoke these methods:
4180 1) For the _STR and _MLS names, automatically repair/convert an ASCII
4181 string to a Unicode buffer.
4182 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
4184 lone end tag descriptor in the following cases: A Return(0) was executed,
4185 a null buffer was returned, or no object at all was returned (non-slack
4186 mode only). Adds a new file, nsconvert.c
4187 ACPICA BZ 998. Bob Moore, Lv Zheng.
4189 Resource Manager: Added additional code to prevent possible infinite
4191 while traversing corrupted or ill-formed resource template buffers. Check
4192 for zero-length resource descriptors in all code that loops through
4193 resource templates (the length field is used to index through the
4194 template). This change also hardens the external AcpiWalkResources and
4195 AcpiWalkResourceBuffer interfaces.
4197 Local Cache Manager: Enhanced the main data structure to eliminate an
4198 unnecessary mechanism to access the next object in the list. Actually
4199 provides a small performance enhancement for hosts that use the local
4200 ACPICA cache manager. Jung-uk Kim.
4202 Example Code and Data Size: These are the sizes for the OS-independent
4203 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4204 debug version of the code includes the debug output trace mechanism and
4205 has a much larger code and data size.
4208 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4209 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4211 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4212 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4215 2) iASL Compiler/Disassembler and Tools:
4217 iASL/Disassembler: Fixed several issues with the definition of the ACPI
4218 5.0 RASF table (RAS Feature Table). This change incorporates late changes
4219 that were made to the ACPI 5.0 specification.
4221 iASL/Disassembler: Added full support for the following new ACPI tables:
4222 1) The MTMR table (MID Timer Table)
4223 2) The VRTC table (Virtual Real Time Clock Table).
4224 Includes header file, disassembler, table compiler, and template support
4227 iASL: Implemented compile-time validation of package objects returned by
4228 predefined names. This new feature validates static package objects
4229 returned by the various predefined names defined to return packages. Both
4230 object types and package lengths are validated, for both parent packages
4231 and sub-packages, if any. The code is similar in structure and behavior
4233 the runtime repair mechanism within the AML interpreter and uses the
4234 existing predefined name information table. Adds a new file, aslprepkg.c.
4237 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
4238 This feature detects a binary file with a valid ACPI table header and
4239 invokes the disassembler automatically. Eliminates the need to
4240 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
4242 iASL/Disassembler: Added several warnings for the case where there are
4243 unresolved control methods during the disassembly. This can potentially
4244 cause errors when the output file is compiled, because the disassembler
4245 assumes zero method arguments in these cases (it cannot determine the
4246 actual number of arguments without resolution/definition of the method).
4248 Debugger: Added support to display all resources with a single command.
4249 Invocation of the resources command with no arguments will now display
4251 resources within the current namespace.
4253 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
4256 ----------------------------------------
4257 17 January 2013. Summary of changes for version 20130117:
4259 1) ACPICA Kernel-resident Subsystem:
4261 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
4262 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
4263 objects to return a package containing one integer, most BIOS code
4265 two integers and the previous code reflects that. However, we also need
4267 support BIOS code that actually implements to the ACPI spec, and this
4268 change reflects this.
4270 Fixed two issues with the ACPI_DEBUG_PRINT macros:
4271 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
4272 C compilers that require this support.
4273 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
4274 ACPI_DEBUG is already used by many of the various hosts.
4276 Updated all ACPICA copyrights and signons to 2013. Added the 2013
4277 copyright to all module headers and signons, including the standard Linux
4278 header. This affects virtually every file in the ACPICA core subsystem,
4279 iASL compiler, all ACPICA utilities, and the test suites.
4281 Example Code and Data Size: These are the sizes for the OS-independent
4282 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4283 debug version of the code includes the debug output trace mechanism and
4284 has a much larger code and data size.
4287 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4288 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4290 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4291 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4294 2) iASL Compiler/Disassembler and Tools:
4296 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
4297 prevent a possible fault on some hosts. Some C libraries modify the arg
4298 pointer parameter to vfprintf making it difficult to call it twice in the
4299 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
4300 does not affect the Windows OSL since the Win C library does not modify
4301 the arg pointer. Chao Guan, Bob Moore.
4303 iASL: Fixed a possible infinite loop when the maximum error count is
4304 reached. If an output file other than the .AML file is specified (such as
4305 a listing file), and the maximum number of errors is reached, do not
4306 attempt to flush data to the output file(s) as the compiler is aborting.
4307 This can cause an infinite loop as the max error count code essentially
4308 keeps calling itself.
4310 iASL/Disassembler: Added an option (-in) to ignore NOOP
4312 Implemented for both the compiler and the disassembler. Often, the NOOP
4313 opcode is used as padding for packages that are changed dynamically by
4315 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
4316 errors. This option causes the disassembler to ignore all NOOP opcodes
4317 (0xA3), and it also causes the compiler to ignore all ASL source code
4321 Debugger: Enhanced the Sleep command to execute all sleep states. This
4322 change allows Sleep to be invoked with no arguments and causes the
4323 debugger to execute all of the sleep states, 0-5, automatically.
4325 ----------------------------------------
4326 20 December 2012. Summary of changes for version 20121220:
4328 1) ACPICA Kernel-resident Subsystem:
4330 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
4331 alternate entry point for AcpiWalkResources and improves the usability of
4332 the resource manager by accepting as input a buffer containing the output
4333 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
4334 input buffer is not deleted by this interface so that it can be used by
4335 the host later. See the ACPICA reference for details.
4337 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
4338 (DSDT version < 2). The constant will be truncated and this warning
4339 reflects that behavior.
4341 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
4342 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
4343 both get and set the new wake bit in these descriptors, separately from
4344 the existing share bit. Reported by Aaron Lu.
4346 Interpreter: Fix Store() when an implicit conversion is not possible. For
4347 example, in the cases such as a store of a string to an existing package
4348 object, implement the store as a CopyObject(). This is a small departure
4349 from the ACPI specification which states that the control method should
4351 aborted in this case. However, the ASLTS suite depends on this behavior.
4353 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
4354 macros: check if debug output is currently enabled as soon as possible to
4355 minimize performance impact if debug is in fact not enabled.
4357 Source code restructuring: Cleanup to improve modularity. The following
4358 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
4359 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
4360 Associated makefiles and project files have been updated.
4362 Changed an exception code for LoadTable operator. For the case where one
4363 of the input strings is too long, change the returned exception code from
4364 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
4366 Fixed a possible memory leak in dispatcher error path. On error, delete
4367 the mutex object created during method mutex creation. Reported by
4368 tim.gardner@canonical.com.
4370 Example Code and Data Size: These are the sizes for the OS-independent
4371 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4372 debug version of the code includes the debug output trace mechanism and
4373 has a much larger code and data size.
4376 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4377 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4379 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4380 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4383 2) iASL Compiler/Disassembler and Tools:
4385 iASL: Disallow a method call as argument to the ObjectType ASL operator.
4386 This change tracks an errata to the ACPI 5.0 document. The AML grammar
4387 will not allow the interpreter to differentiate between a method and a
4388 method invocation when these are used as an argument to the ObjectType
4389 operator. The ACPI specification change is to disallow a method
4391 (UserTerm) for the ObjectType operator.
4393 Finish support for the TPM2 and CSRT tables in the headers, table
4394 compiler, and disassembler.
4396 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
4397 always expires immediately if the semaphore is not available. The
4399 code was using a relative-time timeout, but sem_timedwait requires the
4401 of an absolute time.
4403 iASL: Added a remark if the Timer() operator is used within a 32-bit
4404 table. This operator returns a 64-bit time value that will be truncated
4405 within a 32-bit table.
4407 iASL Source code restructuring: Cleanup to improve modularity. The
4408 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
4409 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
4413 ----------------------------------------
4414 14 November 2012. Summary of changes for version 20121114:
4416 1) ACPICA Kernel-resident Subsystem:
4418 Implemented a performance enhancement for ACPI/AML Package objects. This
4419 change greatly increases the performance of Package objects within the
4420 interpreter. It changes the processing of reference counts for packages
4422 optimizing for the most common case where the package sub-objects are
4423 either Integers, Strings, or Buffers. Increases the overall performance
4425 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
4427 Chao Guan. ACPICA BZ 943.
4429 Implemented and deployed common macros to extract flag bits from resource
4430 descriptors. Improves readability and maintainability of the code. Fixes
4432 problem with the UART serial bus descriptor for the number of data bits
4433 flags (was incorrectly 2 bits, should be 3).
4435 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
4436 of the macros and changed the SETx macros to the style of (destination,
4437 source). Also added ACPI_CASTx companion macros. Lv Zheng.
4439 Example Code and Data Size: These are the sizes for the OS-independent
4440 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4441 debug version of the code includes the debug output trace mechanism and
4442 has a much larger code and data size.
4445 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4446 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4448 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4449 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4452 2) iASL Compiler/Disassembler and Tools:
4454 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
4455 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
4456 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
4458 Disassembler: Fixed a problem with external declaration generation. Fixes
4459 a problem where an incorrect pathname could be generated for an external
4460 declaration if the original reference to the object includes leading
4461 carats (^). ACPICA BZ 984.
4463 Debugger: Completed a major update for the Disassemble<method> command.
4464 This command was out-of-date and did not properly disassemble control
4465 methods that had any reasonable complexity. This fix brings the command
4467 to the same level as the rest of the disassembler. Adds one new file,
4468 dmdeferred.c, which is existing code that is now common with the main
4469 disassembler and the debugger disassemble command. ACPICA MZ 978.
4471 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
4472 Newer versions of Bison emit this prototype, so moved the prototype out
4474 the iASL header to where it is actually used in order to avoid a
4478 iASL/Tools: Standardized use of the stream I/O functions:
4479 1) Ensure check for I/O error after every fopen/fread/fwrite
4480 2) Ensure proper order of size/count arguments for fread/fwrite
4481 3) Use test of (Actual != Requested) after all fwrite, and most fread
4482 4) Standardize I/O error messages
4483 Improves reliability and maintainability of the code. Bob Moore, Lv
4487 Disassembler: Prevent duplicate External() statements. During generation
4488 of external statements, detect similar pathnames that are actually
4489 duplicates such as these:
4492 Remove all leading '\' characters from pathnames during the external
4493 statement generation so that duplicates will be detected and tossed.
4496 Tools: Replace low-level I/O with stream I/O functions. Replace
4497 open/read/write/close with the stream I/O equivalents
4498 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
4501 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
4502 name header so that AcpiXtract recognizes the output file/table.
4504 iASL: Remove obsolete -2 option flag. Originally intended to force the
4505 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
4506 and the entire concept is now obsolete.
4508 ----------------------------------------
4509 18 October 2012. Summary of changes for version 20121018:
4512 1) ACPICA Kernel-resident Subsystem:
4514 Updated support for the ACPI 5.0 MPST table. Fixes some problems
4515 introduced by late changes to the table as it was added to the ACPI 5.0
4516 specification. Includes header, disassembler, and data table compiler
4517 support as well as a new version of the MPST template.
4519 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
4520 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
4521 methods: _HID, _CID, and _UID.
4523 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
4524 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
4525 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
4526 names for their various drivers. Affects the AcpiGetObjectInfo external
4527 interface, and other internal interfaces as well.
4529 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
4530 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
4531 on machines that support non-aligned transfers. Optimizes for this case
4532 rather than using a strncpy. With assistance from Zheng Lv.
4534 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
4535 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
4537 Added a new debug print message for AML mutex objects that are force-
4538 released. At control method termination, any currently acquired mutex
4539 objects are force-released. Adds a new debug-only message for each one
4542 Audited/updated all ACPICA return macros and the function debug depth
4543 counter: 1) Ensure that all functions that use the various TRACE macros
4544 also use the appropriate ACPICA return macros. 2) Ensure that all normal
4545 return statements surround the return expression (value) with parens to
4546 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
4547 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
4549 Global source code changes/maintenance: All extra lines at the start and
4550 end of each source file have been removed for consistency. Also, within
4551 comments, all new sentences start with a single space instead of a double
4552 space, again for consistency across the code base.
4554 Example Code and Data Size: These are the sizes for the OS-independent
4555 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4556 debug version of the code includes the debug output trace mechanism and
4557 has a much larger code and data size.
4560 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4561 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4563 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4564 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4567 2) iASL Compiler/Disassembler and Tools:
4569 AcpiExec: Improved the algorithm used for memory leak/corruption
4570 detection. Added some intelligence to the code that maintains the global
4571 list of allocated memory. The list is now ordered by allocated memory
4572 address, significantly improving performance. When running AcpiExec on
4573 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
4574 on the platform and/or the environment. Note, this performance
4575 enhancement affects the AcpiExec utility only, not the kernel-resident
4578 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
4579 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
4580 incorrect table offset reported for invalid opcodes. Report the original
4581 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
4583 Disassembler: Enhanced the -vt option to emit the binary table data in
4584 hex format to assist with debugging.
4586 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
4587 size of file structure. Colin Ian King.
4589 ----------------------------------------
4590 13 September 2012. Summary of changes for version 20120913:
4593 1) ACPICA Kernel-resident Subsystem:
4595 ACPI 5.0: Added two new notify types for the Hardware Error Notification
4596 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
4600 Table Manager: Merged/removed duplicate code in the root table resize
4601 functions. One function is external, the other is internal. Lv Zheng,
4605 Makefiles: Completely removed the obsolete "Linux" makefiles under
4606 acpica/generate/linux. These makefiles are obsolete and have been
4609 the generic unix makefiles under acpica/generate/unix.
4611 Makefiles: Ensure that binary files always copied properly. Minor rule
4613 to ensure that the final binary output files are always copied up to the
4614 appropriate binary directory (bin32 or bin64.)
4616 Example Code and Data Size: These are the sizes for the OS-independent
4617 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4619 version of the code includes the debug output trace mechanism and has a
4621 larger code and data size.
4624 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
4625 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
4627 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4628 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4631 2) iASL Compiler/Disassembler and Tools:
4633 Disassembler: Fixed a possible fault during the disassembly of resource
4634 descriptors when a second parse is required because of the invocation of
4635 external control methods within the table. With assistance from
4636 adq@lidskialf.net. ACPICA BZ 976.
4638 iASL: Fixed a namepath optimization problem. An error can occur if the
4640 node that contains the namepath to be optimized does not have a parent
4642 that is a named object. This change fixes the problem.
4644 iASL: Fixed a regression where the AML file is not deleted on errors. The
4646 output file should be deleted if there are any errors during the
4649 only exception is if the -f (force output) option is used. ACPICA BZ 974.
4651 iASL: Added a feature to automatically increase internal line buffer
4653 Via realloc(), automatically increase the internal line buffer sizes as
4654 necessary to support very long source code lines. The current version of
4656 preprocessor requires a buffer long enough to contain full source code
4658 This change increases the line buffer(s) if the input lines go beyond the
4659 current buffer size. This eliminates errors that occurred when a source
4661 line was longer than the buffer.
4663 iASL: Fixed a problem with constant folding in method declarations. The
4664 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
4666 Type3 opcode was used.
4668 Debugger: Improved command help support. For incorrect argument count,
4670 full help for the command. For help command itself, allow an argument to
4673 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
4674 errors during execution of the suite. Guan Chao.
4676 ----------------------------------------
4677 16 August 2012. Summary of changes for version 20120816:
4680 1) ACPICA Kernel-resident Subsystem:
4682 Removed all use of the deprecated _GTS and _BFS predefined methods. The
4684 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
4685 deprecated and will probably be removed from the ACPI specification.
4687 does not invoke them, and reportedly never will. The final nail in the
4689 is that the ACPI specification states that these methods must be run with
4690 interrupts off, which is not going to happen in a kernel interpreter.
4692 Linux has removed all use of the methods also. It was discovered that
4693 invoking these functions caused failures on some machines, probably
4695 they were never tested since Windows does not call them. Affects two
4697 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
4700 Implemented support for complex bit-packed buffers returned from the _PLD
4701 (Physical Location of Device) predefined method. Adds a new external
4702 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
4704 structure. Note: C Bitfields cannot be used for this type of predefined
4705 structure since the memory layout of individual bitfields is not defined
4707 the C language. In addition, there are endian concerns where a compiler
4709 change the bitfield ordering based on the machine type. The new ACPICA
4710 interface eliminates these issues, and should be called after _PLD is
4711 executed. ACPICA BZ 954.
4713 Implemented a change to allow a scope change to root (via "Scope (\)")
4715 execution of module-level ASL code (code that is executed at table load
4718 Added the Windows8/Server2012 string for the _OSI method. This change
4721 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
4724 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
4726 and CSRT (Core System Resource Table).
4728 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
4729 names. This simplifies access to the buffers returned by these predefined
4730 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
4732 GPE support: Removed an extraneous parameter from the various low-level
4733 internal GPE functions. Tang Feng.
4735 Removed the linux makefiles from the unix packages. The generate/linux
4736 makefiles are obsolete and have been removed from the unix tarball
4738 packages. The replacement makefiles are under generate/unix, and there is
4740 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
4742 Updates for Unix makefiles:
4743 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
4744 2) Update linker flags (move to end of command line) for AcpiExec
4748 Split ACPICA initialization functions to new file, utxfinit.c. Split from
4749 utxface.c to improve modularity and reduce file size.
4751 Example Code and Data Size: These are the sizes for the OS-independent
4752 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4753 debug version of the code includes the debug output trace mechanism and
4755 much larger code and data size.
4758 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
4759 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
4761 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
4762 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
4765 2) iASL Compiler/Disassembler and Tools:
4767 iASL: Fixed a problem with constant folding for fixed-length constant
4768 expressions. The constant-folding code was not being invoked for constant
4769 expressions that allow the use of type 3/4/5 opcodes to generate
4771 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
4773 in the generation of invalid AML bytecode. ACPICA BZ 970.
4775 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
4776 apparently automatically emit some of the necessary externals. This
4778 handles these versions in order to eliminate generation warnings.
4780 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
4782 Disassembler: Add support to decode _PLD buffers. The decoded buffer
4784 within comments in the output file.
4786 Debugger: Fixed a regression with the "Threads" command where
4787 AE_BAD_PARAMETER was always returned.
4789 ----------------------------------------
4790 11 July 2012. Summary of changes for version 20120711:
4792 1) ACPICA Kernel-resident Subsystem:
4794 Fixed a possible fault in the return package object repair code. Fixes a
4795 problem that can occur when a lone package object is wrapped with an
4797 package object in order to force conformance to the ACPI specification.
4799 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
4803 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
4804 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
4805 ARB_DIS bit must be implemented in the host-dependent C3 processor power
4807 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
4809 Intel and other vendors. (for Intel: ICH4-M and earlier)
4811 This change removes the code to disable/enable bus master arbitration
4813 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
4815 resume problems on some machines. The change has been in use for over
4819 Implemented two new external interfaces to support host-directed dynamic
4821 table load and unload. They are intended to simplify the host
4823 of hot-plug support:
4824 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
4825 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
4827 See the ACPICA reference for additional details. Adds one new file,
4828 components/tables/tbxfload.c
4830 Implemented and deployed two new interfaces for errors and warnings that
4832 known to be caused by BIOS/firmware issues:
4833 AcpiBiosError: Prints "ACPI Firmware Error" message.
4834 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
4835 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
4837 and FADT errors. Additional deployment to be completed as appropriate in
4839 future. The associated conditional macros are ACPI_BIOS_ERROR and
4840 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
4845 Implicit notify support: ensure that no memory allocation occurs within a
4846 critical region. This fix moves a memory allocation outside of the time
4848 spinlock is held. Fixes issues on systems that do not allow this
4852 Split exception code utilities and tables into a new file,
4855 Example Code and Data Size: These are the sizes for the OS-independent
4856 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4858 version of the code includes the debug output trace mechanism and has a
4860 larger code and data size.
4863 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
4864 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
4866 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
4867 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
4870 2) iASL Compiler/Disassembler and Tools:
4872 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
4876 Debugger: Enhanced the "tables" command to emit additional information
4878 the current set of ACPI tables, including the owner ID and flags decode.
4880 Debugger: Reimplemented the "unload" command to use the new
4881 AcpiUnloadParentTable external interface. This command was disable
4883 due to need for an unload interface.
4885 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
4887 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
4889 ----------------------------------------
4890 20 June 2012. Summary of changes for version 20120620:
4893 1) ACPICA Kernel-resident Subsystem:
4895 Implemented support to expand the "implicit notify" feature to allow
4897 devices to be notified by a single GPE. This feature automatically
4899 runtime device notification in the absence of a BIOS-provided GPE control
4900 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
4902 provided by ACPICA for Windows compatibility, and is a workaround for
4905 code errors. See the description of the AcpiSetupGpeForWake interface in
4907 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
4909 Changed some comments and internal function names to simplify and ensure
4910 correctness of the Linux code translation. No functional changes.
4912 Example Code and Data Size: These are the sizes for the OS-independent
4913 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4915 version of the code includes the debug output trace mechanism and has a
4917 larger code and data size.
4920 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
4921 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
4923 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
4924 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
4927 2) iASL Compiler/Disassembler and Tools:
4929 Disassembler: Added support to emit short, commented descriptions for the
4931 predefined names in order to improve the readability of the disassembled
4932 output. ACPICA BZ 959. Changes include:
4933 1) Emit descriptions for all standard predefined names (_INI, _STA,
4936 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
4937 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
4940 AcpiSrc: Fixed several long-standing Linux code translation issues.
4942 descriptions in function headers are now translated properly to lower
4945 underscores. ACPICA BZ 961. Also fixes translation problems such as
4951 local_fADT -> local_FADT
4952 execute_oSI -> execute_OSI
4954 iASL: Fixed a problem where null bytes were inadvertently emitted into
4958 iASL: Added the existing debug options to the standard help screen. There
4960 no longer two different help screens. ACPICA BZ 957.
4962 AcpiHelp: Fixed some typos in the various predefined name descriptions.
4964 expand some of the descriptions where appropriate.
4966 iASL: Fixed the -ot option (display compile times/statistics). Was not
4968 properly for standard output; only worked for the debug file case.
4970 ----------------------------------------
4971 18 May 2012. Summary of changes for version 20120518:
4974 1) ACPICA Core Subsystem:
4976 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
4978 to block until asynchronous events such as notifies and GPEs have
4980 Within ACPICA, it is only called before a notify or GPE handler is
4981 removed/uninstalled. It also may be useful for the host OS within related
4982 drivers such as the Embedded Controller driver. See the ACPICA reference
4984 additional information. ACPICA BZ 868.
4986 ACPI Tables: Added a new error message for a possible overflow failure
4988 the conversion of FADT 32-bit legacy register addresses to internal
4991 bit GAS structure representation. The GAS has a one-byte "bit length"
4993 thus limiting the register length to 255 bits. ACPICA BZ 953.
4995 Example Code and Data Size: These are the sizes for the OS-independent
4996 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4998 version of the code includes the debug output trace mechanism and has a
5000 larger code and data size.
5003 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5004 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5006 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5007 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5010 2) iASL Compiler/Disassembler and Tools:
5012 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
5014 This keyword was added late in the ACPI 5.0 release cycle and was not
5015 implemented until now.
5017 Disassembler: Added support for Operation Region externals. Adds missing
5018 support for operation regions that are defined in another table, and
5019 referenced locally via a Field or BankField ASL operator. Now generates
5021 correct External statement.
5023 Disassembler: Several additional fixes for the External() statement
5025 related to some ASL operators. Also, order the External() statements
5026 alphabetically in the disassembler output. Fixes the External()
5029 the Create* field, Alias, and Scope operators:
5030 1) Create* buffer field operators - fix type mismatch warning on
5032 2) Alias - implement missing External support
5033 3) Scope - fix to make sure all necessary externals are emitted.
5035 iASL: Improved pathname support. For include files, merge the prefix
5037 with the file pathname and eliminate unnecessary components. Convert
5038 backslashes in all pathnames to forward slashes, for readability. Include
5040 pathname changes affect both #include and Include() type operators.
5042 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
5044 of a valid line by inserting a newline and then returning the EOF during
5046 next call to GetNextLine. Prevents the line from being ignored due to EOF
5049 iASL: Implemented some changes to enhance the IDE support (-vi option.)
5051 and Warning messages are now correctly recognized for both the source
5053 browser and the global error and warning counts.
5055 ----------------------------------------
5056 20 April 2012. Summary of changes for version 20120420:
5059 1) ACPICA Core Subsystem:
5061 Implemented support for multiple notify handlers. This change adds
5064 allow multiple system and device notify handlers on Device, Thermal Zone,
5066 Processor objects. This can simplify the host OS notification
5068 Also re-worked and restructured the entire notify support code to
5070 handler installation, handler removal, notify event queuing, and notify
5071 dispatch to handler(s). Note: there can still only be two global notify
5072 handlers - one for system notifies and one for device notifies. There are
5074 changes to the existing handler install/remove interfaces. Lin Ming, Bob
5075 Moore, Rafael Wysocki.
5077 Fixed a regression in the package repair code where the object reference
5078 count was calculated incorrectly. Regression was introduced in the commit
5079 "Support to add Package wrappers".
5081 Fixed a couple possible memory leaks in the AML parser, in the error
5083 path. Jesper Juhl, Lin Ming.
5085 Example Code and Data Size: These are the sizes for the OS-independent
5086 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5087 debug version of the code includes the debug output trace mechanism and
5089 much larger code and data size.
5092 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5093 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5095 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5096 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5099 2) iASL Compiler/Disassembler and Tools:
5101 iASL: Fixed a problem with the resource descriptor support where the
5103 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
5104 included in cumulative descriptor offset, resulting in incorrect values
5106 resource tags within resource descriptors appearing after a
5108 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
5110 iASL and Preprocessor: Implemented full support for the #line directive
5112 correctly track original source file line numbers through the .i
5114 output file - for error and warning messages.
5116 iASL: Expand the allowable byte constants for address space IDs.
5118 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
5119 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
5121 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
5123 iASL: Add option to completely disable the preprocessor (-Pn).
5125 iASL: Now emit all error/warning messages to standard error (stderr) by
5126 default (instead of the previous stdout).
5128 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
5130 for resource descriptor offset fix above. Update/cleanup error output
5131 routines. Enable and send iASL errors/warnings to an error logfile
5132 (error.txt). Send all other iASL output to a logfile (compiler.txt).
5134 several extraneous "unrecognized operator" messages.
5136 ----------------------------------------
5137 20 March 2012. Summary of changes for version 20120320:
5140 1) ACPICA Core Subsystem:
5142 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
5143 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
5145 does not execute these methods, and therefore these methods are often
5146 untested. It has been seen on some systems where the execution of these
5147 methods causes errors and also prevents the machine from entering S5. It
5149 therefore suggested that host operating systems do not execute these
5151 by default. In the future, perhaps these methods can be optionally
5153 based on the age of the system and/or what is the newest version of
5155 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
5157 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
5160 Fixed a problem where the length of the local/common FADT was set too
5162 The local FADT table length cannot be set to the common length until the
5163 original length has been examined. There is code that checks the table
5165 and sets various fields appropriately. This can affect older machines
5167 early FADT versions. For example, this can cause inadvertent writes to
5169 CST_CNT register. Julian Anastasov.
5171 Fixed a mapping issue related to a physical table override. Use the
5173 mapping mechanism for tables loaded via the physical override OSL
5175 This allows for early mapping before the virtual memory manager is
5177 Thomas Renninger, Bob Moore.
5179 Enhanced the automatic return-object repair code: Repair a common problem
5181 predefined methods that are defined to return a variable-length Package
5183 sub-objects. If there is only one sub-object, some BIOS ASL code
5185 simply returns the single object instead of a Package with one sub-
5187 This new support will repair this error by wrapping a Package object
5189 the original object, creating the correct and expected Package with one
5191 object. Names that can be repaired in this manner include: _ALR, _CSD,
5193 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
5196 Changed the exception code returned for invalid ACPI paths passed as
5197 parameters to external interfaces such as AcpiEvaluateObject. Was
5198 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
5200 Example Code and Data Size: These are the sizes for the OS-independent
5201 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5203 version of the code includes the debug output trace mechanism and has a
5205 larger code and data size.
5208 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5209 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5211 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5212 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5215 2) iASL Compiler/Disassembler and Tools:
5217 iASL: Added the infrastructure and initial implementation of a integrated
5219 like preprocessor. This will simplify BIOS development process by
5221 the need for a separate preprocessing step during builds. On Windows, it
5223 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
5224 features including full #define() macro support are still under
5226 These preprocessor directives are supported:
5239 In addition, these new command line options are supported:
5240 -D <symbol> Define symbol for preprocessor use
5241 -li Create preprocessed output file (*.i)
5242 -P Preprocess only and create preprocessor output file (*.i)
5244 Table Compiler: Fixed a problem where the equals operator within an
5246 did not work properly.
5248 Updated iASL to use the current versions of Bison/Flex. Updated the
5250 project file to invoke these tools from the standard location. ACPICA BZ
5253 Flex for Windows: V2.5.4
5254 Bison for Windows: V2.4.1
5256 ----------------------------------------
5257 15 February 2012. Summary of changes for version 20120215:
5260 1) ACPICA Core Subsystem:
5262 There have been some major changes to the sleep/wake support code, as
5263 described below (a - e).
5265 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
5266 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
5267 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
5269 time the _BFS method is called and the _WAK method is called. NOTE: all
5271 must update their wake/resume code or else sleep/wake will not work
5275 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
5277 method. Some machines require that the GPEs are enabled before the _WAK
5279 is executed. Thomas Renninger.
5281 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
5283 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
5285 determine whether the system is rebooting or resuming. Matthew Garrett.
5287 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
5289 match the ACPI specification requirement. Rafael Wysocki.
5291 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
5292 registers within the V5 FADT. This support adds two new files:
5293 hardware/hwesleep.c implements the support for the new registers. Moved
5295 sleep/wake external interfaces to hardware/hwxfsleep.c.
5298 Added a new OSL interface for ACPI table overrides,
5299 AcpiOsPhysicalTableOverride. This interface allows the host to override a
5300 table via a physical address, instead of the logical address required by
5301 AcpiOsTableOverride. This simplifies the host implementation. Initial
5302 implementation by Thomas Renninger. The ACPICA implementation creates a
5304 shared function for table overrides that attempts both a logical and a
5307 Expanded the OSL memory read/write interfaces to 64-bit data
5308 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
5309 transfer support for GAS register structures passed to AcpiRead and
5312 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
5314 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
5316 See the ACPICA reference for details. ACPICA BZ 942. This option removes
5318 10% of the code and 5% of the static data, and the following hardware
5320 features become unavailable:
5321 PM Event and Control registers
5322 SCI interrupt (and handler)
5324 General Purpose Events (GPEs)
5327 FACS table (Waking vectors and Global Lock)
5329 Updated the unix tarball directory structure to match the ACPICA git
5331 tree. This ensures that the generic unix makefiles work properly (in
5332 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
5335 Updated the return value of the _REV predefined method to integer value 5
5337 reflect ACPI 5.0 support.
5339 Moved the external ACPI PM timer interface prototypes to the public
5341 file where they belong.
5343 Example Code and Data Size: These are the sizes for the OS-independent
5344 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5346 version of the code includes the debug output trace mechanism and has a
5348 larger code and data size.
5351 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5352 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5354 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5355 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5358 2) iASL Compiler/Disassembler and Tools:
5360 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
5361 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
5362 incorrectly displayed.
5364 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
5367 ----------------------------------------
5368 11 January 2012. Summary of changes for version 20120111:
5371 1) ACPICA Core Subsystem:
5373 Implemented a new mechanism to allow host device drivers to check for
5375 range conflicts with ACPI Operation Regions. Both SystemMemory and
5377 address spaces are supported. A new external interface,
5378 AcpiCheckAddressRange,
5379 allows drivers to check an address range against the ACPI namespace. See
5381 ACPICA reference for additional details. Adds one new file,
5382 utilities/utaddress.c. Lin Ming, Bob Moore.
5384 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
5387 Status registers, update the ACPI 5.0 flags, and update internal data
5388 structures to handle an FADT larger than 256 bytes. The size of the ACPI
5392 Updated all ACPICA copyrights and signons to 2012. Added the 2012
5394 all module headers and signons, including the standard Linux header. This
5395 affects virtually every file in the ACPICA core subsystem, iASL compiler,
5397 all ACPICA utilities.
5399 Example Code and Data Size: These are the sizes for the OS-independent
5400 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5402 version of the code includes the debug output trace mechanism and has a
5404 larger code and data size.
5407 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5408 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5410 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5411 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5414 2) iASL Compiler/Disassembler and Tools:
5416 Disassembler: fixed a problem with the automatic resource tag generation
5417 support. Fixes a problem where the resource tags are inadvertently not
5418 constructed if the table being disassembled contains external references
5420 control methods. Moved the actual construction of the tags to after the
5422 namespace is constructed (after 2nd parse is invoked due to external
5424 method references.) ACPICA BZ 941.
5426 Table Compiler: Make all "generic" operators caseless. These are the
5428 like UINT8, String, etc. Making these caseless improves ease-of-use.
5432 ----------------------------------------
5433 23 November 2011. Summary of changes for version 20111123:
5435 0) ACPI 5.0 Support:
5437 This release contains full support for the ACPI 5.0 specification, as
5440 Reduced Hardware Support:
5441 -------------------------
5443 This support allows for ACPI systems without the usual ACPI hardware.
5445 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
5447 not attempt to initialize or use any of the usual ACPI hardware. Note,
5449 this flag is set, all of the following ACPI hardware is assumed to be not
5450 present and is not initialized or accessed:
5452 General Purpose Events (GPEs)
5453 Fixed Events (PM1a/PM1b and PM Control)
5454 Power Management Timer and Console Buttons (power/sleep)
5455 Real-time Clock Alarm
5457 System Control Interrupt (SCI)
5458 The FACS is assumed to be non-existent
5463 All new tables and updates to existing tables are fully supported in the
5464 ACPICA headers (for use by device drivers), the disassembler, and the
5466 Data Table Compiler. ACPI 5.0 defines these new tables:
5468 BGRT /* Boot Graphics Resource Table */
5469 DRTM /* Dynamic Root of Trust for Measurement table */
5470 FPDT /* Firmware Performance Data Table */
5471 GTDT /* Generic Timer Description Table */
5472 MPST /* Memory Power State Table */
5473 PCCT /* Platform Communications Channel Table */
5474 PMTT /* Platform Memory Topology Table */
5475 RASF /* RAS Feature table */
5477 Operation Regions/SpaceIDs:
5478 ---------------------------
5480 All new operation regions are fully supported by the iASL compiler, the
5481 disassembler, and the ACPICA runtime code (for dispatch to region
5483 The new operation region Space IDs are:
5488 Resource Descriptors:
5489 ---------------------
5491 All new ASL resource descriptors are fully supported by the iASL
5494 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
5496 all new predefined resource tags). New descriptors are:
5505 ASL/AML Operators, New and Modified:
5506 ------------------------------------
5508 One new operator is added, the Connection operator, which is used to
5510 a GeneralPurposeIo or GenericSerialBus resource descriptor with
5512 field objects within an operation region. Several new protocols are
5514 with the AccessAs operator. All are fully supported by the iASL compiler,
5515 disassembler, and runtime ACPICA AML interpreter:
5517 Connection // Declare Field Connection
5519 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
5520 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
5522 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
5523 RawDataBuffer // Data type for Vendor Data
5526 Predefined ASL/AML Objects:
5527 ---------------------------
5529 All new predefined objects/control-methods are supported by the iASL
5531 and the ACPICA runtime validation/repair (arguments and return values.)
5533 predefined names include the following:
5535 Standard Predefined Names (Objects or Control Methods):
5536 _AEI, _CLS, _CPC, _CWS, _DEP,
5537 _DLM, _EVT, _GCP, _CRT, _GWS,
5538 _HRV, _PRE, _PSE, _SRT, _SUB.
5540 Resource Tags (Names used to access individual fields within resource
5542 _DBT, _DPL, _DRS, _END, _FLC,
5543 _IOR, _LIN, _MOD, _PAR, _PHA,
5544 _PIN, _PPI, _POL, _RXL, _SLV,
5545 _SPE, _STB, _TXL, _VEN.
5547 ACPICA External Interfaces:
5548 ---------------------------
5550 Several new interfaces have been defined for use by ACPI-related device
5551 drivers and other host OS services:
5553 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
5555 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
5556 provided by the BIOS. They are intended to be used in conjunction with
5558 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
5559 mutual exclusion with the AML code/interpreter.
5561 AcpiGetEventResources: Returns the (formatted) resource descriptors as
5563 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
5565 resource descriptors associated with hardware-reduced platform events,
5567 to the AcpiGetCurrentResources interface.
5569 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
5570 operation regions, information about the Connection() object and any
5572 length information is passed to the region handler within the Context
5575 AcpiBufferToResource: This interface converts a raw AML buffer containing
5577 resource template or resource descriptor to the ACPI_RESOURCE internal
5579 suitable for use by device drivers. Can be used by an operation region
5581 to convert the Connection() buffer object into a ACPI_RESOURCE.
5583 Miscellaneous/Tools/TestSuites:
5584 -------------------------------
5586 Support for extended _HID names (Four alpha characters instead of three).
5587 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
5588 Support for ACPI 5.0 features in the ASLTS test suite.
5589 Fully updated documentation (ACPICA and iASL reference documents.)
5591 ACPI Table Definition Language:
5592 -------------------------------
5594 Support for this language was implemented and released as a subsystem of
5596 iASL compiler in 2010. (See the iASL compiler User Guide.)
5599 Non-ACPI 5.0 changes for this release:
5600 --------------------------------------
5602 1) ACPICA Core Subsystem:
5604 Fix a problem with operation region declarations where a failure can
5607 the region name and an argument that evaluates to an object (such as the
5608 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
5611 Do not abort an ACPI table load if an invalid space ID is found within.
5613 will be caught later if the offending method is executed. ACPICA BZ 925.
5615 Fixed an issue with the FFixedHW space ID where the ID was not always
5616 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
5618 Fixed a problem with the 32-bit generation of the unix-specific OSL
5619 (osunixxf.c). Lin Ming, ACPICA BZ 936.
5621 Several changes made to enable generation with the GCC 4.6 compiler.
5625 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
5627 field registers out-of-range.
5629 2) iASL Compiler/Disassembler and Tools:
5631 iASL: Implemented the __PATH__ operator, which returns the full pathname
5633 the current source file.
5635 AcpiHelp: Automatically display expanded keyword information for all ASL
5638 Debugger: Add "Template" command to disassemble/dump resource template
5641 Added a new master script to generate and execute the ASLTS test suite.
5642 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
5644 iASL: Fix problem with listing generation during processing of the
5646 operator where AML listing was disabled until the entire Switch block was
5649 iASL: Improve support for semicolon statement terminators. Fix "invalid
5650 character" message for some cases when the semicolon is used. Semicolons
5652 now allowed after every <Term> grammar element. ACPICA BZ 927.
5654 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
5657 Disassembler: Fix problem with disassembly of the DataTableRegion
5659 where an inadvertent "Unhandled deferred opcode" message could be
5662 3) Example Code and Data Size
5664 These are the sizes for the OS-independent acpica.lib produced by the
5665 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
5666 includes the debug output trace mechanism and has a much larger code and
5671 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5672 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5674 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5675 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5677 ----------------------------------------
5678 22 September 2011. Summary of changes for version 20110922:
5682 Support for ACPI 5.0 in ACPICA has been underway for several months and
5684 be released at the same time that ACPI 5.0 is officially released.
5686 The ACPI 5.0 specification is on track for release in the next few
5689 1) ACPICA Core Subsystem:
5691 Fixed a problem where the maximum sleep time for the Sleep() operator was
5692 intended to be limited to two seconds, but was inadvertently limited to
5696 Linux and Unix makefiles: Added header file dependencies to ensure
5698 generation of ACPICA core code and utilities. Also simplified the
5700 considerably through the use of the vpath variable to specify search
5704 2) iASL Compiler/Disassembler and Tools:
5706 iASL: Implemented support to check the access length for all fields
5708 access named Resource Descriptor fields. For example, if a resource field
5710 defined to be two bits, a warning is issued if a CreateXxxxField() is
5712 with an incorrect bit length. This is implemented for all current
5714 descriptor names. ACPICA BZ 930.
5716 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
5720 iASL: Fixed a couple of issues associated with variable-length package
5721 objects. 1) properly handle constants like One, Ones, Zero -- do not make
5723 VAR_PACKAGE when these are used as a package length. 2) Allow the
5725 opcode (in addition to PACKAGE) when validating object types for
5729 iASL: Emit statistics for all output files (instead of just the ASL input
5731 AML output). Includes listings, hex files, etc.
5733 iASL: Added -G option to the table compiler to allow the compilation of
5735 ACPI tables. The only part of a table that is required is the standard
5740 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
5742 which also adds correct 64-bit support. Also, now all output filenames
5744 completely lower case.
5746 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
5747 loading table files. A warning is issued for any such tables. The only
5748 exception is an FADT. This also fixes a possible fault when attempting to
5750 non-AML tables. ACPICA BZ 932.
5752 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
5754 missing table terminator could cause a fault when using the -p option.
5756 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
5759 3) Example Code and Data Size
5761 These are the sizes for the OS-independent acpica.lib produced by the
5762 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
5763 includes the debug output trace mechanism and has a much larger code and
5767 Previous Release (VC 9.0):
5768 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5769 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5770 Current Release (VC 9.0):
5771 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5772 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5775 ----------------------------------------
5776 23 June 2011. Summary of changes for version 20110623:
5778 1) ACPI CA Core Subsystem:
5780 Updated the predefined name repair mechanism to not attempt repair of a
5782 return object if a _PSS object is present. We can only sort the _TSS
5784 package if there is no _PSS within the same scope. This is because if
5787 present, the ACPI specification dictates that the _TSS Power Dissipation
5789 is to be ignored, and therefore some BIOSs leave garbage values in the
5791 Power field(s). In this case, it is best to just return the _TSS package
5793 is. Reported by, and fixed with assistance from Fenghua Yu.
5795 Added an option to globally disable the control method return value
5797 and repair. This runtime option can be used to disable return value
5800 this is causing a problem on a particular machine. Also added an option
5802 AcpiExec (-dr) to set this disable flag.
5804 All makefiles and project files: Major changes to improve generation of
5806 tools. ACPICA BZ 912:
5807 Reduce default optimization levels to improve compatibility
5808 For Linux, add strict-aliasing=0 for gcc 4
5809 Cleanup and simplify use of command line defines
5810 Cleanup multithread library support
5811 Improve usage messages
5813 Linux-specific header: update handling of THREAD_ID and pthread. For the
5815 bit case, improve casting to eliminate possible warnings, especially with
5819 Example Code and Data Size: These are the sizes for the OS-independent
5820 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5822 version of the code includes the debug output trace mechanism and has a
5824 larger code and data size.
5826 Previous Release (VC 9.0):
5827 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
5828 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5829 Current Release (VC 9.0):
5830 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5831 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5833 2) iASL Compiler/Disassembler and Tools:
5835 With this release, a new utility named "acpihelp" has been added to the
5837 package. This utility summarizes the ACPI specification chapters for the
5839 and AML languages. It generates under Linux/Unix as well as Windows, and
5840 provides the following functionality:
5841 Find/display ASL operator(s) -- with description and syntax.
5842 Find/display ASL keyword(s) -- with exact spelling and descriptions.
5843 Find/display ACPI predefined name(s) -- with description, number
5844 of arguments, and the return value data type.
5845 Find/display AML opcode name(s) -- with opcode, arguments, and
5847 Decode/display AML opcode -- with opcode name, arguments, and
5850 Service Layers: Make multi-thread support configurable. Conditionally
5852 the multi-thread support so that threading libraries will not be linked
5855 necessary. The only tool that requires multi-thread support is AcpiExec.
5857 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
5859 Bison appear to want the interface to yyerror to be a const char * (or at
5860 least this is a problem when generating iASL on some systems.) ACPICA BZ
5864 Tools: Fix for systems where O_BINARY is not defined. Only used for
5866 versions of the tools.
5868 ----------------------------------------
5869 27 May 2011. Summary of changes for version 20110527:
5871 1) ACPI CA Core Subsystem:
5873 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
5875 signature. Now, only allow SSDT, OEMx, and a null signature. History:
5876 1) Originally, we checked the table signature for "SSDT" or "PSDT".
5877 (PSDT is now obsolete.)
5878 2) We added support for OEMx tables, signature "OEM" plus a fourth
5879 "don't care" character.
5880 3) Valid tables were encountered with a null signature, so we just
5881 gave up on validating the signature, (05/2008).
5882 4) We encountered non-AML tables such as the MADT, which caused
5883 interpreter errors and kernel faults. So now, we once again allow
5884 only SSDT, OEMx, and now, also a null signature. (05/2011).
5886 Added the missing _TDL predefined name to the global name list in order
5888 enable validation. Affects both the core ACPICA code and the iASL
5891 Example Code and Data Size: These are the sizes for the OS-independent
5892 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5894 version of the code includes the debug output trace mechanism and has a
5896 larger code and data size.
5898 Previous Release (VC 9.0):
5899 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
5900 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
5901 Current Release (VC 9.0):
5902 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
5903 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5905 2) iASL Compiler/Disassembler and Tools:
5907 Debugger/AcpiExec: Implemented support for "complex" method arguments on
5909 debugger command line. This adds support beyond simple integers --
5911 Strings, Buffers, and Packages. Includes support for nested packages.
5912 Increased the default command line buffer size to accommodate these
5914 See the ACPICA reference for details and syntax. ACPICA BZ 917.
5916 Debugger/AcpiExec: Implemented support for "default" method arguments for
5918 Execute/Debug command. Now, the debugger will always invoke a control
5920 with the required number of arguments -- even if the command line
5922 none or insufficient arguments. It uses default integer values for any
5924 arguments. Also fixes a bug where only six method arguments maximum were
5925 supported instead of the required seven.
5927 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
5929 also return status in order to prevent buffer overruns. See the ACPICA
5930 reference for details and syntax. ACPICA BZ 921
5932 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
5933 makefiles to simplify support for the two different but similar parser
5934 generators, bison and yacc.
5936 Updated the generic unix makefile for gcc 4. The default gcc version is
5938 expected to be 4 or greater, since options specific to gcc 4 are used.
5940 ----------------------------------------
5941 13 April 2011. Summary of changes for version 20110413:
5943 1) ACPI CA Core Subsystem:
5945 Implemented support to execute a so-called "orphan" _REG method under the
5947 device. This change will force the execution of a _REG method underneath
5950 device even if there is no corresponding operation region of type
5951 EmbeddedControl. Fixes a problem seen on some machines and apparently is
5952 compatible with Windows behavior. ACPICA BZ 875.
5954 Added more predefined methods that are eligible for automatic NULL
5956 element removal. This change adds another group of predefined names to
5959 of names that can be repaired by having NULL package elements dynamically
5960 removed. This group are those methods that return a single variable-
5962 package containing simple data types such as integers, buffers, strings.
5964 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
5967 and _TZD. ACPICA BZ 914.
5969 Split and segregated all internal global lock functions to a new file,
5972 Updated internal address SpaceID for DataTable regions. Moved this
5975 id in preparation for ACPI 5.0 changes that will include some new space
5978 change should not affect user/host code.
5980 Example Code and Data Size: These are the sizes for the OS-independent
5982 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
5984 the code includes the debug output trace mechanism and has a much larger
5989 Previous Release (VC 9.0):
5990 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
5991 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
5992 Current Release (VC 9.0):
5993 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
5994 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
5996 2) iASL Compiler/Disassembler and Tools:
5998 iASL/DTC: Major update for new grammar features. Allow generic data types
6000 custom ACPI tables. Field names are now optional. Any line can be split
6002 multiple lines using the continuation char (\). Large buffers now use
6004 continuation character(s) and no colon on the continuation lines. See the
6006 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
6009 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
6011 Since the parser stuffs a "zero" as the return value for these statements
6014 the underlying AML grammar), they were seen as "return with value" by the
6016 semantic checking. They are now seen correctly as "null" return
6019 iASL: Check if a_REG declaration has a corresponding Operation Region.
6021 check for each _REG to ensure that there is in fact a corresponding
6023 region declaration in the same scope. If not, the _REG method is not very
6025 since it probably won't be executed. ACPICA BZ 915.
6027 iASL/DTC: Finish support for expression evaluation. Added a new
6030 that implements c-style operator precedence and parenthesization. ACPICA
6034 Disassembler/DTC: Remove support for () and <> style comments in data
6037 that DTC has full expression support, we don't want to have comment
6040 start with a parentheses or a less-than symbol. Now, only the standard /*
6043 comments are supported, as well as the bracket [] comments.
6045 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
6047 headers in the acpidump file. Update the header validation to support
6049 tables. Problem introduced in previous AcpiXtract version in the change
6051 support "wrong checksum" error messages emitted by acpidump utility.
6053 iASL: Add a * option to generate all template files (as a synonym for
6057 "iasl -T *" or "iasl -T ALL".
6059 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
6061 abort the compiler on "fatal" errors, simply should abort the current
6063 This allows multiple compiles with a single (possibly wildcard) compiler
6066 ----------------------------------------
6067 16 March 2011. Summary of changes for version 20110316:
6069 1) ACPI CA Core Subsystem:
6071 Fixed a problem caused by a _PRW method appearing at the namespace root
6073 during the setup of wake GPEs. A fault could occur if a _PRW directly
6076 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
6078 Implemented support for "spurious" Global Lock interrupts. On some
6080 global lock interrupt can occur without the pending flag being set. Upon
6083 interrupt, we now ensure that a thread is actually waiting for the lock
6085 signaling GL availability. Rafael Wysocki, Bob Moore.
6087 Example Code and Data Size: These are the sizes for the OS-independent
6089 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6091 the code includes the debug output trace mechanism and has a much larger
6096 Previous Release (VC 9.0):
6097 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6098 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6099 Current Release (VC 9.0):
6100 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6101 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6103 2) iASL Compiler/Disassembler and Tools:
6105 Implemented full support for the "SLIC" ACPI table. Includes support in
6107 header files, disassembler, table compiler, and template generator. Bob
6111 AcpiXtract: Correctly handle embedded comments and messages from
6113 Apparently some or all versions of acpidump will occasionally emit a
6116 "Wrong checksum", etc., into the dump file. This was causing problems for
6117 AcpiXtract. ACPICA BZ 905.
6119 iASL: Fix the Linux makefile by removing an inadvertent double file
6123 AcpiExec: Update installation of operation region handlers. Install one
6125 for a user-defined address space. This is used by the ASL test suite
6128 ----------------------------------------
6129 11 February 2011. Summary of changes for version 20110211:
6131 1) ACPI CA Core Subsystem:
6133 Added a mechanism to defer _REG methods for some early-installed
6135 Most user handlers should be installed before call to
6136 AcpiEnableSubsystem.
6137 However, Event handlers and region handlers should be installed after
6138 AcpiInitializeObjects. Override handlers for the "default" regions should
6140 installed early, however. This change executes all _REG methods for the
6141 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
6142 chicken/egg issues between them. ACPICA BZ 848.
6144 Implemented an optimization for GPE detection. This optimization will
6146 ignore GPE registers that contain no enabled GPEs -- there is no need to
6147 read the register since this information is available internally. This
6148 becomes more important on machines with a large GPE space. ACPICA
6150 884. Lin Ming. Suggestion from Joe Liu.
6152 Removed all use of the highly unreliable FADT revision field. The
6154 number in the FADT has been found to be completely unreliable and cannot
6156 trusted. Only the actual table length can be used to infer the version.
6158 change updates the ACPICA core and the disassembler so that both no
6160 even look at the FADT version and instead depend solely upon the FADT
6163 Fix an unresolved name issue for the no-debug and no-error-message source
6164 generation cases. The _AcpiModuleName was left undefined in these cases,
6166 it is actually needed as a parameter to some interfaces. Define
6167 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
6169 Split several large files (makefiles and project files updated)
6170 utglobal.c -> utdecode.c
6171 dbcomds.c -> dbmethod.c dbnames.c
6172 dsopcode.c -> dsargs.c dscontrol.c
6173 dsload.c -> dsload2.c
6174 aslanalyze.c -> aslbtypes.c aslwalks.c
6176 Example Code and Data Size: These are the sizes for the OS-independent
6177 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6178 debug version of the code includes the debug output trace mechanism and
6180 a much larger code and data size.
6182 Previous Release (VC 9.0):
6183 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6184 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6185 Current Release (VC 9.0):
6186 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6187 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6189 2) iASL Compiler/Disassembler and Tools:
6191 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
6192 These are useful C-style macros with the standard definitions. ACPICA
6195 iASL/DTC: Added support for integer expressions and labels. Support for
6197 expressions for all integer fields in all ACPI tables. Support for labels
6199 "generic" portions of tables such as UEFI. See the iASL reference manual.
6201 Debugger: Added a command to display the status of global handlers. The
6202 "handlers" command will display op region, fixed event, and miscellaneous
6203 global handlers. installation status -- and for op regions, whether
6205 or user-installed handler will be used.
6207 iASL: Warn if reserved method incorrectly returns a value. Many
6209 names are defined such that they do not return a value. If implemented as
6211 method, issue a warning if such a name explicitly returns a value. ACPICA
6214 iASL: Added detection of GPE method name conflicts. Detects a conflict
6216 there are two GPE methods of the form _Lxy and _Exy in the same scope.
6218 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
6220 iASL/DTC: Fixed a couple input scanner issues with comments and line
6221 numbers. Comment remover could get confused and miss a comment ending.
6223 a problem with line counter maintenance.
6225 iASL/DTC: Reduced the severity of some errors from fatal to error. There
6227 no need to abort on simple errors within a field definition.
6229 Debugger: Simplified the output of the help command. All help output now
6231 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
6233 ----------------------------------------
6234 12 January 2011. Summary of changes for version 20110112:
6236 1) ACPI CA Core Subsystem:
6238 Fixed a race condition between method execution and namespace walks that
6240 possibly cause a fault. The problem was apparently introduced in version
6241 20100528 as a result of a performance optimization that reduces the
6244 namespace walks upon method exit by using the delete_namespace_subtree
6245 function instead of the delete_namespace_by_owner function used
6247 Bug is a missing namespace lock in the delete_namespace_subtree function.
6248 dana.myers@oracle.com
6250 Fixed several issues and a possible fault with the automatic "serialized"
6251 method support. History: This support changes a method to "serialized" on
6253 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
6254 possibility that it cannot handle reentrancy. This fix repairs a couple
6256 issues seen in the field, especially on machines with many cores:
6258 1) Delete method children only upon the exit of the last thread,
6259 so as to not delete objects out from under other running threads
6260 (and possibly causing a fault.)
6261 2) Set the "serialized" bit for the method only upon the exit of the
6262 Last thread, so as to not cause deadlock when running threads
6264 3) Cleanup the use of the AML "MethodFlags" and internal method flags
6265 so that there is no longer any confusion between the two.
6267 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
6269 Debugger: Now lock the namespace for duration of a namespace dump.
6271 issues if the namespace is changing dynamically underneath the debugger.
6272 Especially affects temporary namespace nodes, since the debugger displays
6275 Updated the ordering of include files. The ACPICA headers should appear
6276 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
6278 any necessary compiler-specific defines, etc. Affects the ACPI-related
6282 Updated all ACPICA copyrights and signons to 2011. Added the 2011
6284 to all module headers and signons, including the Linux header. This
6286 virtually every file in the ACPICA core subsystem, iASL compiler, and all
6289 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
6290 project files for VC++ 6.0 are now obsolete. New project files can be
6292 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
6295 Example Code and Data Size: These are the sizes for the OS-independent
6296 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6297 debug version of the code includes the debug output trace mechanism and
6299 much larger code and data size.
6301 Previous Release (VC 6.0):
6302 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6303 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6304 Current Release (VC 9.0):
6305 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6306 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6308 2) iASL Compiler/Disassembler and Tools:
6310 iASL: Added generic data types to the Data Table compiler. Add "generic"
6312 types such as UINT32, String, Unicode, etc., to simplify the generation
6314 platform-defined tables such as UEFI. Lin Ming.
6316 iASL: Added listing support for the Data Table Compiler. Adds listing
6318 (-l) to display actual binary output for each line of input code.
6320 ----------------------------------------
6321 09 December 2010. Summary of changes for version 20101209:
6323 1) ACPI CA Core Subsystem:
6325 Completed the major overhaul of the GPE support code that was begun in
6327 2010. Major features include: removal of _PRW execution in ACPICA (host
6328 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
6329 changes to existing interfaces, simplification of GPE handler operation,
6331 a handful of new interfaces:
6337 One new file, evxfgpe.c to consolidate all external GPE interfaces.
6339 See the ACPICA Programmer Reference for full details and programming
6340 information. See the new section 4.4 "General Purpose Event (GPE)
6342 for a full overview, and section 8.7 "ACPI General Purpose Event
6344 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
6346 Bob Moore, Rafael Wysocki.
6348 Implemented a new GPE feature for Windows compatibility, the "Implicit
6350 GPE Notify". This feature will automatically issue a Notify(2) on a
6352 when a Wake GPE is received if there is no corresponding GPE method or
6353 handler. ACPICA BZ 870.
6355 Fixed a problem with the Scope() operator during table parse and load
6357 During load phase (table load or method execution), the scope operator
6359 not enter the target into the namespace. Instead, it should open a new
6361 at the target location. Linux BZ 19462, ACPICA BZ 882.
6363 Example Code and Data Size: These are the sizes for the OS-independent
6364 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6365 debug version of the code includes the debug output trace mechanism and
6367 much larger code and data size.
6370 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6371 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6373 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6374 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6376 2) iASL Compiler/Disassembler and Tools:
6378 iASL: Relax the alphanumeric restriction on _CID strings. These strings
6380 "bus-specific" per the ACPI specification, and therefore any characters
6382 acceptable. The only checks that can be performed are for a null string
6384 perhaps for a leading asterisk. ACPICA BZ 886.
6386 iASL: Fixed a problem where a syntax error that caused a premature EOF
6387 condition on the source file emitted a very confusing error message. The
6388 premature EOF is now detected correctly. ACPICA BZ 891.
6390 Disassembler: Decode the AccessSize within a Generic Address Structure
6392 access, word access, etc.) Note, this field does not allow arbitrary bit
6393 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
6395 New: AcpiNames utility - Example namespace dump utility. Shows an example
6397 ACPICA configuration for a minimal namespace dump utility. Uses table and
6398 namespace managers, but no AML interpreter. Does not add any
6400 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
6401 partition and configure ACPICA. ACPICA BZ 883.
6403 AML Debugger: Increased the debugger buffer size for method return
6405 Was 4K, increased to 16K. Also enhanced error messages for debugger
6407 execution, including the buffer overflow case.
6409 ----------------------------------------
6410 13 October 2010. Summary of changes for version 20101013:
6412 1) ACPI CA Core Subsystem:
6414 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
6416 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
6417 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
6419 Changed the type of the predefined namespace object _TZ from ThermalZone
6421 Device. This was found to be confusing to the host software that
6423 the various thermal zones, since _TZ is not really a ThermalZone.
6426 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
6429 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
6430 string is "Windows 2006 SP2".
6432 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
6434 code automatically repairs _HID-related strings, this type of code is no
6435 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
6438 Example Code and Data Size: These are the sizes for the OS-independent
6439 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6440 debug version of the code includes the debug output trace mechanism and
6442 much larger code and data size.
6445 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6446 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6448 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6449 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6451 2) iASL Compiler/Disassembler and Tools:
6453 iASL: Implemented additional compile-time validation for _HID strings.
6455 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
6458 the string must be exactly seven or eight characters. For both _HID and
6460 strings, all characters must be alphanumeric. ACPICA BZ 874.
6462 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
6463 descriptors that are mostly or all zeros, with the expectation that they
6465 be filled in at runtime. iASL now allows this as long as there is a
6467 tag" (name) associated with the descriptor, which gives the ASL a handle
6468 needed to modify the descriptor. ACPICA BZ 873.
6470 Added single-thread support to the generic Unix application OSL.
6472 for iASL support, this change removes the use of semaphores in the
6474 threaded ACPICA tools/applications - increasing performance. The
6475 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
6476 option. ACPICA BZ 879.
6478 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
6480 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
6482 iASL: Moved all compiler messages to a new file, aslmessages.h.
6484 ----------------------------------------
6485 15 September 2010. Summary of changes for version 20100915:
6487 1) ACPI CA Core Subsystem:
6489 Removed the AcpiOsDerivePciId OSL interface. The various host
6491 of this function were not OS-dependent and are now obsolete and can be
6492 removed from all host OSLs. This function has been replaced by
6493 AcpiHwDerivePciId, which is now part of the ACPICA core code.
6494 AcpiHwDerivePciId has been implemented without recursion. Adds one new
6495 module, hwpci.c. ACPICA BZ 857.
6497 Implemented a dynamic repair for _HID and _CID strings. The following
6498 problems are now repaired at runtime: 1) Remove a leading asterisk in the
6499 string, and 2) the entire string is uppercased. Both repairs are in
6500 accordance with the ACPI specification and will simplify host driver
6504 The ACPI_THREAD_ID type is no longer configurable, internally it is now
6505 always UINT64. This simplifies the ACPICA code, especially any printf
6507 UINT64 is the only common data type for all thread_id types across all
6508 operating systems. It is now up to the host OSL to cast the native
6510 type to UINT64 before returning the value to ACPICA (via
6512 Lin Ming, Bob Moore.
6514 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
6516 keyword is not standard across compilers, and this type allows inline to
6518 configured on a per-compiler basis. Lin Ming.
6520 Made the system global AcpiGbl_SystemAwakeAndRunning publically
6522 Added an extern for this boolean in acpixf.h. Some hosts utilize this
6524 during suspend/restore operations. ACPICA BZ 869.
6526 All code that implements error/warning messages with the "ACPI:" prefix
6528 been moved to a new module, utxferror.c.
6530 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
6532 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
6534 Example Code and Data Size: These are the sizes for the OS-independent
6535 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6536 debug version of the code includes the debug output trace mechanism and
6538 much larger code and data size.
6541 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6542 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6544 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6545 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6547 2) iASL Compiler/Disassembler and Tools:
6549 iASL/Disassembler: Write ACPI errors to stderr instead of the output
6551 This keeps the output files free of random error messages that may
6553 from within the namespace/interpreter code. Used this opportunity to
6555 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
6556 866. Lin Ming, Bob Moore.
6558 Tools: update some printfs for ansi warnings on size_t. Handle width
6560 of size_t on 32-bit versus 64-bit generations. Lin Ming.
6562 ----------------------------------------
6563 06 August 2010. Summary of changes for version 20100806:
6565 1) ACPI CA Core Subsystem:
6567 Designed and implemented a new host interface to the _OSI support code.
6569 will allow the host to dynamically add or remove multiple _OSI strings,
6571 well as install an optional handler that is called for each _OSI
6573 Also added a new AML debugger command, 'osi' to display and modify the
6575 _OSI string table, and test support in the AcpiExec utility. See the
6577 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
6579 AcpiInstallInterface - Add an _OSI string.
6580 AcpiRemoveInterface - Delete an _OSI string.
6581 AcpiInstallInterfaceHandler - Install optional _OSI handler.
6583 AcpiOsValidateInterface - no longer used.
6585 source/components/utilities/utosi.c
6587 Re-introduced the support to enable multi-byte transfers for Embedded
6588 Controller (EC) operation regions. A reported problem was found to be a
6590 in the host OS, not in the multi-byte support. Previously, the maximum
6592 size passed to the EC operation region handler was a single byte. There
6594 often EC Fields larger than one byte that need to be transferred, and it
6596 useful for the EC driver to lock these as a single transaction. This
6598 enables single transfers larger than 8 bits. This effectively changes the
6599 access to the EC space from ByteAcc to AnyAcc, and will probably require
6600 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
6602 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
6604 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
6605 prototype in acpiosxf.h had the output value pointer as a (void *).
6606 It should be a (UINT64 *). This may affect some host OSL code.
6608 Fixed a couple problems with the recently modified Linux makefiles for
6610 and AcpiExec. These new makefiles place the generated object files in the
6611 local directory so that there can be no collisions between the files that
6613 shared between them that are compiled with different options.
6615 Example Code and Data Size: These are the sizes for the OS-independent
6616 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6617 debug version of the code includes the debug output trace mechanism and
6619 much larger code and data size.
6622 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6623 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
6625 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6626 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6628 2) iASL Compiler/Disassembler and Tools:
6630 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
6632 namespace from and disassemble an entire group of AML files. Useful for
6633 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
6635 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
6637 iASL: Allow multiple invocations of -e option. This change allows
6639 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
6643 ----------------------------------------
6644 02 July 2010. Summary of changes for version 20100702:
6646 1) ACPI CA Core Subsystem:
6648 Implemented several updates to the recently added GPE reference count
6649 support. The model for "wake" GPEs is changing to give the host OS
6651 control of these GPEs. Eventually, the ACPICA core will not execute any
6653 methods, since the host already must execute them. Also, additional
6655 were made to help ensure that the reference counts are kept in proper
6656 synchronization with reality. Rafael J. Wysocki.
6658 1) Ensure that GPEs are not enabled twice during initialization.
6659 2) Ensure that GPE enable masks stay in sync with the reference count.
6660 3) Do not inadvertently enable GPEs when writing GPE registers.
6661 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
6662 interface. This interface will set or clear individual GPEs for wakeup.
6663 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
6665 are now used for "runtime" GPEs only.
6667 Changed the behavior of the GPE install/remove handler interfaces. The
6670 no longer disabled during this process, as it was found to cause problems
6672 some machines. Rafael J. Wysocki.
6674 Reverted a change introduced in version 20100528 to enable Embedded
6675 Controller multi-byte transfers. This change was found to cause problems
6677 Index Fields and possibly Bank Fields. It will be reintroduced when these
6678 problems have been resolved.
6680 Fixed a problem with references to Alias objects within Package Objects.
6682 reference to an Alias within the definition of a Package was not always
6683 resolved properly. Aliases to objects like Processors, Thermal zones,
6685 were resolved to the actual object instead of a reference to the object
6688 should be. Package objects are only allowed to contain integer, string,
6689 buffer, package, and reference objects. Redhat bugzilla 608648.
6691 Example Code and Data Size: These are the sizes for the OS-independent
6692 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6693 debug version of the code includes the debug output trace mechanism and
6695 much larger code and data size.
6698 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6699 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
6701 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6702 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
6704 2) iASL Compiler/Disassembler and Tools:
6706 iASL: Implemented a new compiler subsystem to allow definition and
6707 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
6709 are called "ACPI Data Tables", and the new compiler is the "Data Table
6710 Compiler". This compiler is intended to simplify the existing error-prone
6711 process of creating these tables for the BIOS, as well as allowing the
6712 disassembly, modification, recompilation, and override of existing ACPI
6714 tables. See the iASL User Guide for detailed information.
6716 iASL: Implemented a new Template Generator option in support of the new
6718 Table Compiler. This option will create examples of all known ACPI tables
6719 that can be used as the basis for table development. See the iASL
6720 documentation and the -T option.
6722 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
6725 Updated the Linux makefiles for iASL and AcpiExec to place the generated
6726 object files in the local directory so that there can be no collisions
6727 between the shared files between them that are generated with different
6730 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
6732 the #define __APPLE__ to enable this support.
6734 ----------------------------------------
6735 28 May 2010. Summary of changes for version 20100528:
6737 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
6738 available at www.acpi.info. This is primarily an errata release.
6740 1) ACPI CA Core Subsystem:
6742 Undefined ACPI tables: We are looking for the definitions for the
6744 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
6746 Implemented support to enable multi-byte transfers for Embedded
6748 (EC) operation regions. Previously, the maximum data size passed to the
6750 operation region handler was a single byte. There are often EC Fields
6752 than one byte that need to be transferred, and it is useful for the EC
6754 to lock these as a single transaction. This change enables single
6756 larger than 8 bits. This effectively changes the access to the EC space
6758 ByteAcc to AnyAcc, and will probably require changes to the host OS
6760 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
6762 transfers. Alexey Starikovskiy, Lin Ming
6764 Implemented a performance enhancement for namespace search and access.
6766 change enhances the performance of namespace searches and walks by adding
6768 backpointer to the parent in each namespace node. On large namespaces,
6770 change can improve overall ACPI performance by up to 9X. Adding a pointer
6772 each namespace node increases the overall size of the internal namespace
6774 about 5%, since each namespace entry usually consists of both a namespace
6775 node and an ACPI operand object. However, this is the first growth of the
6776 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
6778 Implemented a performance optimization that reduces the number of
6780 walks. On control method exit, only walk the namespace if the method is
6782 to have created namespace objects outside of its local scope. Previously,
6784 entire namespace was traversed on each control method exit. This change
6786 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
6789 Added support to truncate I/O addresses to 16 bits for Windows
6791 Some ASL code has been seen in the field that inadvertently has bits set
6792 above bit 15. This feature is optional and is enabled if the BIOS
6794 any Windows OSI strings. It can also be enabled by the host OS. Matthew
6797 Added support to limit the maximum time for the ASL Sleep() operator. To
6798 prevent accidental deep sleeps, limit the maximum time that Sleep() will
6799 actually sleep. Configurable, the default maximum is two seconds. ACPICA
6802 Added run-time validation support for the _WDG and_WED Microsoft
6804 methods. These objects are defined by "Windows Instrumentation", and are
6806 part of the ACPI spec. ACPICA BZ 860.
6808 Expanded all statistic counters used during namespace and device
6809 initialization from 16 to 32 bits in order to support very large
6812 Replaced all instances of %d in printf format specifiers with %u since
6814 all integers in ACPICA are unsigned.
6816 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
6820 Example Code and Data Size: These are the sizes for the OS-independent
6821 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6822 debug version of the code includes the debug output trace mechanism and
6824 much larger code and data size.
6827 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
6828 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
6830 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6831 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
6833 2) iASL Compiler/Disassembler and Tools:
6835 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
6836 methods. These objects are defined by "Windows Instrumentation", and are
6838 part of the ACPI spec. ACPICA BZ 860.
6840 AcpiExec: added option to disable the memory tracking mechanism. The -dt
6841 option will disable the tracking mechanism, which improves performance
6844 AcpiExec: Restructured the command line options into -d (disable) and -e
6847 ----------------------------------------
6848 28 April 2010. Summary of changes for version 20100428:
6850 1) ACPI CA Core Subsystem:
6852 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
6853 including FADT-based and GPE Block Devices, execute any _PRW methods in
6855 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
6856 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
6857 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
6858 Devices. Provides compatibility with other ACPI implementations. Two new
6859 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
6862 Fixed a regression introduced in version 20100331 within the table
6864 where initial table loading could fail. This was introduced in the fix
6866 AcpiReallocateRootTable. Also, renamed some of fields in the table
6868 data structures to clarify their meaning and use.
6870 Fixed a possible allocation overrun during internal object copy in
6871 AcpiUtCopySimpleObject. The original code did not correctly handle the
6873 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
6876 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
6877 possible access beyond end-of-allocation. Also, now fully validate
6879 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
6881 Example Code and Data Size: These are the sizes for the OS-independent
6882 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6883 debug version of the code includes the debug output trace mechanism and
6885 much larger code and data size.
6888 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
6889 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
6891 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
6892 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
6894 2) iASL Compiler/Disassembler and Tools:
6896 iASL: Implemented Min/Max/Len/Gran validation for address resource
6897 descriptors. This change implements validation for the address fields
6899 are common to all address-type resource descriptors. These checks are
6900 implemented: Checks for valid Min/Max, length within the Min/Max window,
6901 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
6903 table 6-40 in the ACPI 4.0a specification. Also split the large
6905 and aslrestype2.c files into five new files. ACPICA BZ 840.
6907 iASL: Added support for the _Wxx predefined names. This support was
6909 and these names were not recognized by the compiler as valid predefined
6910 names. ACPICA BZ 851.
6912 iASL: Added an error for all predefined names that are defined to return
6914 value and thus must be implemented as Control Methods. These include all
6916 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
6917 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
6919 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
6921 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
6923 dynamically loaded via the Load() operator. Also cleaned up output for
6926 ta and -tc options. ACPICA BZ 853.
6928 Tests: Added a new file with examples of extended iASL error checking.
6929 Demonstrates the advanced error checking ability of the iASL compiler.
6930 Available at tests/misc/badcode.asl.
6932 ----------------------------------------
6933 31 March 2010. Summary of changes for version 20100331:
6935 1) ACPI CA Core Subsystem:
6937 Completed a major update for the GPE support in order to improve support
6939 shared GPEs and to simplify both host OS and ACPICA code. Added a
6941 count mechanism to support shared GPEs that require multiple device
6943 Several external interfaces have changed. One external interface has been
6944 removed. One new external interface was added. Most of the GPE external
6945 interfaces now use the GPE spinlock instead of the events mutex (and the
6946 Flags parameter for many GPE interfaces has been removed.) See the
6948 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
6950 Wysocki. ACPICA BZ 831.
6953 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
6959 Implemented write support for DataTable operation regions. These regions
6961 defined via the DataTableRegion() operator. Previously, only read support
6963 implemented. The ACPI specification allows DataTableRegions to be
6967 Implemented a new subsystem option to force a copy of the DSDT to local
6968 memory. Optionally copy the entire DSDT to local memory (instead of
6970 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
6972 the original DSDT, creating the need for this option. Default is FALSE,
6976 Implemented detection of a corrupted or replaced DSDT. This change adds
6977 support to detect a DSDT that has been corrupted and/or replaced from
6979 the OS (by firmware). This is typically catastrophic for the system, but
6981 been seen on some machines. Once this problem has been detected, the DSDT
6982 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
6984 Fixed two problems with AcpiReallocateRootTable during the root table
6986 When copying the root table to the new allocation, the length used was
6987 incorrect. The new size was used instead of the current table size,
6989 too much data was copied. Also, the count of available slots for ACPI
6991 was not set correctly. Alexey Starikovskiy, Bob Moore.
6993 Example Code and Data Size: These are the sizes for the OS-independent
6994 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6995 debug version of the code includes the debug output trace mechanism and
6997 much larger code and data size.
7000 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7001 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7003 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7004 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7006 2) iASL Compiler/Disassembler and Tools:
7008 iASL: Implement limited typechecking for values returned from predefined
7009 control methods. The type of any returned static (unnamed) object is now
7010 validated. For example, Return(1). ACPICA BZ 786.
7012 iASL: Fixed a predefined name object verification regression. Fixes a
7014 introduced in version 20100304. An error is incorrectly generated if a
7015 predefined name is declared as a static named object with a value defined
7016 using the keywords "Zero", "One", or "Ones". Lin Ming.
7018 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
7020 reducing the requested registry access rights. ACPICA BZ 842.
7022 Disassembler: fixed a possible fault when generating External()
7024 Introduced in commit ae7d6fd: Properly handle externals with parent-
7026 (carat). Fixes a string length allocation calculation. Lin Ming.
7028 ----------------------------------------
7029 04 March 2010. Summary of changes for version 20100304:
7031 1) ACPI CA Core Subsystem:
7033 Fixed a possible problem with the AML Mutex handling function
7034 AcpiExReleaseMutex where the function could fault under the very rare
7035 condition when the interpreter has blocked, the interpreter lock is
7037 the interpreter is then reentered via the same thread, and attempts to
7038 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
7042 Implemented additional configuration support for the AML "Debug Object".
7043 Output from the debug object can now be enabled via a global variable,
7044 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
7046 This debug output is now available in the release version of ACPICA
7048 of just the debug version. Also, the entire debug output module can now
7050 configured out of the ACPICA build if desired. One new file added,
7051 executer/exdebug.c. Lin Ming, Bob Moore.
7053 Added header support for the ACPI MCHI table (Management Controller Host
7054 Interface Table). This table was added in ACPI 4.0, but the defining
7056 has only recently become available.
7058 Standardized output of integer values for ACPICA warnings/errors. Always
7060 0x prefix for hex output, always use %u for unsigned integer decimal
7062 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
7064 invocations.) These invocations were converted from the original
7065 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
7067 Example Code and Data Size: These are the sizes for the OS-independent
7068 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7069 debug version of the code includes the debug output trace mechanism and
7071 much larger code and data size.
7074 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7075 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7077 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7078 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7080 2) iASL Compiler/Disassembler and Tools:
7082 iASL: Implemented typechecking support for static (non-control method)
7083 predefined named objects that are declared with the Name() operator. For
7084 example, the type of this object is now validated to be of type Integer:
7085 Name(_BBN, 1). This change migrates the compiler to using the core
7087 name table instead of maintaining a local version. Added a new file,
7088 aslpredef.c. ACPICA BZ 832.
7090 Disassembler: Added support for the ACPI 4.0 MCHI table.
7092 ----------------------------------------
7093 21 January 2010. Summary of changes for version 20100121:
7095 1) ACPI CA Core Subsystem:
7097 Added the 2010 copyright to all module headers and signons. This affects
7098 virtually every file in the ACPICA core subsystem, the iASL compiler, the
7099 tools/utilities, and the test suites.
7101 Implemented a change to the AcpiGetDevices interface to eliminate
7103 invocations of the _STA method. In the case where a specific _HID is
7104 requested, do not run _STA until a _HID match is found. This eliminates
7105 potentially dozens of _STA calls during a search for a particular
7107 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
7109 Implemented an additional repair for predefined method return values.
7111 to repair unexpected NULL elements within returned Package objects.
7114 Integer of value zero, a NULL String, or a zero-length Buffer as
7116 ACPICA BZ 818. Lin Ming, Bob Moore.
7118 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
7120 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
7122 64-bit AML integers). It is now obsolete and this change removes it from
7124 ACPICA code base, replaced by UINT64. The original typedef has been
7126 for now for compatibility with existing device driver code. ACPICA BZ
7129 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
7131 the parse tree object.
7133 Added additional warning options for the gcc-4 generation. Updated the
7135 accordingly. This includes some code restructuring to eliminate
7137 code, elimination of some gotos, elimination of unused return values,
7139 additional casting, and removal of redundant declarations.
7141 Example Code and Data Size: These are the sizes for the OS-independent
7142 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7143 debug version of the code includes the debug output trace mechanism and
7145 much larger code and data size.
7148 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7149 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7151 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7152 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7154 2) iASL Compiler/Disassembler and Tools:
7156 No functional changes for this release.
7158 ----------------------------------------
7159 14 December 2009. Summary of changes for version 20091214:
7161 1) ACPI CA Core Subsystem:
7163 Enhanced automatic data type conversions for predefined name repairs.
7165 change expands the automatic repairs/conversions for predefined name
7167 values to make Integers, Strings, and Buffers fully interchangeable.
7170 Buffer can be converted to a Package of Integers if necessary. The
7172 module was completely restructured. Lin Ming, Bob Moore.
7174 Implemented automatic removal of null package elements during predefined
7176 repairs. This change will automatically remove embedded and trailing NULL
7177 package elements from returned package objects that are defined to
7180 variable number of sub-packages. The driver is then presented with a
7182 with no null elements to deal with. ACPICA BZ 819.
7184 Implemented a repair for the predefined _FDE and _GTM names. The expected
7185 return value for both names is a Buffer of 5 DWORDs. This repair fixes
7187 possible problems (both seen in the field), where a package of integers
7189 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
7192 Implemented additional module-level code support. This change will
7194 execute module-level code that is not at the root of the namespace (under
7196 Device object, etc.). Now executes the code within the current scope
7198 of the root. ACPICA BZ 762. Lin Ming.
7200 Fixed possible mutex acquisition errors when running _REG methods. Fixes
7202 problem where mutex errors can occur when running a _REG method that is
7204 the same scope as a method-defined operation region or an operation
7206 under a module-level IF block. This type of code is rare, so the problem
7208 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
7210 Fixed a possible memory leak during module-level code execution. An
7212 could be leaked for each block of executed module-level code if the
7213 interpreter slack mode is enabled This change deletes any implicitly
7215 object from the module-level code block. Lin Ming.
7217 Removed messages for successful predefined repair(s). The repair
7219 was considered too wordy. Now, messages are only unconditionally emitted
7221 the return object cannot be repaired. Existing messages for successful
7222 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
7225 Example Code and Data Size: These are the sizes for the OS-independent
7226 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7227 debug version of the code includes the debug output trace mechanism and
7229 much larger code and data size.
7232 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7233 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7235 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7236 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7238 2) iASL Compiler/Disassembler and Tools:
7240 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
7242 were no longer automatically removed at the termination of the compile.
7244 acpiexec: Implemented the -f option to specify default region fill value.
7245 This option specifies the value used to initialize buffers that simulate
7246 operation regions. Default value is zero. Useful for debugging problems
7248 depend on a specific initial value for a region or field.
7250 ----------------------------------------
7251 12 November 2009. Summary of changes for version 20091112:
7253 1) ACPI CA Core Subsystem:
7255 Implemented a post-order callback to AcpiWalkNamespace. The existing
7256 interface only has a pre-order callback. This change adds an additional
7257 parameter for a post-order callback which will be more useful for bus
7259 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
7261 Modified the behavior of the operation region memory mapping cache for
7262 SystemMemory. Ensure that the memory mappings created for operation
7264 do not cross 4K page boundaries. Crossing a page boundary while mapping
7265 regions can cause kernel warnings on some hosts if the pages have
7267 attributes. Such regions are probably BIOS bugs, and this is the
7269 Linux BZ 14445. Lin Ming.
7271 Implemented an automatic repair for predefined methods that must return
7272 sorted lists. This change will repair (by sorting) packages returned by
7274 _PSS, and _TSS. Drivers can now assume that the packages are correctly
7276 and do not contain NULL package elements. Adds one new file,
7277 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
7279 Fixed a possible fault during predefined name validation if a return
7281 object contains NULL elements. Also adds a warning if a NULL element is
7282 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
7284 include repair or removal of all such NULL elements where possible.
7286 Implemented additional module-level executable AML code support. This
7288 will execute module-level code that is not at the root of the namespace
7289 (under a Device object, etc.) at table load time. Module-level executable
7291 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
7293 Implemented a new internal function to create Integer objects. This
7295 simplifies miscellaneous object creation code. ACPICA BZ 823.
7297 Reduced the severity of predefined repair messages, Warning to Info.
7299 the object was successfully repaired, a warning is too severe. Reduced to
7301 info message for now. These messages may eventually be changed to debug-
7305 Example Code and Data Size: These are the sizes for the OS-independent
7306 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7307 debug version of the code includes the debug output trace mechanism and
7309 much larger code and data size.
7312 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7313 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7315 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7316 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7318 2) iASL Compiler/Disassembler and Tools:
7320 iASL: Implemented Switch() with While(1) so that Break works correctly.
7322 change correctly implements the Switch operator with a surrounding
7324 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
7326 iASL: Added a message if a package initializer list is shorter than
7328 length. Adds a new remark for a Package() declaration if an initializer
7330 exists, but is shorter than the declared length of the package. Although
7331 technically legal, this is probably a coding error and it is seen in the
7332 field. ACPICA BZ 815. Lin Ming, Bob Moore.
7334 iASL: Fixed a problem where the compiler could fault after the maximum
7336 of errors was reached (200).
7338 acpixtract: Fixed a possible warning for pointer cast if the compiler
7340 level set very high.
7342 ----------------------------------------
7343 13 October 2009. Summary of changes for version 20091013:
7345 1) ACPI CA Core Subsystem:
7347 Fixed a problem where an Operation Region _REG method could be executed
7349 than once. If a custom address space handler is installed by the host
7351 the "initialize operation regions" phase of the ACPICA initialization,
7353 _REG methods for that address space could be executed twice. This change
7354 fixes the problem. ACPICA BZ 427. Lin Ming.
7356 Fixed a possible memory leak for the Scope() ASL operator. When the exact
7357 invocation of "Scope(\)" is executed (change scope to root), one internal
7358 operand object was leaked. Lin Ming.
7360 Implemented a run-time repair for the _MAT predefined method. If the _MAT
7361 return value is defined as a Field object in the AML, and the field
7362 size is less than or equal to the default width of an integer (32 or
7364 can incorrectly return an Integer instead of a Buffer. ACPICA now
7365 automatically repairs this problem. ACPICA BZ 810.
7367 Implemented a run-time repair for the _BIF and _BIX predefined methods.
7369 "OEM Information" field is often incorrectly returned as an Integer with
7370 value zero if the field is not supported by the platform. This is due to
7372 ambiguity in the ACPI specification. The field should always be a string.
7373 ACPICA now automatically repairs this problem by returning a NULL string
7374 within the returned Package. ACPICA BZ 807.
7376 Example Code and Data Size: These are the sizes for the OS-independent
7377 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7378 debug version of the code includes the debug output trace mechanism and
7380 much larger code and data size.
7383 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7384 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7386 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7387 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7389 2) iASL Compiler/Disassembler and Tools:
7391 Disassembler: Fixed a problem where references to external symbols that
7392 contained one or more parent-prefixes (carats) were not handled
7394 possibly causing a fault. ACPICA BZ 806. Lin Ming.
7396 Disassembler: Restructured the code so that all functions that handle
7397 external symbols are in a single module. One new file is added,
7400 AML Debugger: Added a max count argument for the Batch command (which
7401 executes multiple predefined methods within the namespace.)
7403 iASL: Updated the compiler documentation (User Reference.) Available at
7404 http://www.acpica.org/documentation/. ACPICA BZ 750.
7406 AcpiXtract: Updated for Lint and other formatting changes. Close all open
7409 ----------------------------------------
7410 03 September 2009. Summary of changes for version 20090903:
7412 1) ACPI CA Core Subsystem:
7414 For Windows Vista compatibility, added the automatic execution of an _INI
7415 method located at the namespace root (\_INI). This method is executed at
7416 table load time. This support is in addition to the automatic execution
7418 \_SB._INI. Lin Ming.
7420 Fixed a possible memory leak in the interpreter for AML package objects
7422 the package initializer list is longer than the defined size of the
7424 This apparently can only happen if the BIOS changes the package size on
7426 fly (seen in a _PSS object), as ASL compilers do not allow this. The
7427 interpreter will truncate the package to the defined size (and issue an
7429 message), but previously could leave the extra objects undeleted if they
7431 pre-created during the argument processing (such is the case if the
7433 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
7435 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
7436 This has been reported in the field. Previously, ACPICA would zero out
7438 buffer/string. Now, the operation is treated as a noop. Provides Windows
7439 compatibility. ACPICA BZ 803. Lin Ming.
7441 Removed an extraneous error message for ASL constructs of the form
7442 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
7444 are seen in many BIOSs and are once again treated as NOOPs and no error
7446 emitted when they are encountered. ACPICA BZ 785.
7448 Fixed an extraneous warning message if a _DSM reserved method returns a
7449 Package object. _DSM can return any type of object, so validation on the
7450 return type cannot be performed. ACPICA BZ 802.
7452 Example Code and Data Size: These are the sizes for the OS-independent
7453 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7454 debug version of the code includes the debug output trace mechanism and
7456 much larger code and data size.
7459 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7460 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7462 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7463 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7465 2) iASL Compiler/Disassembler and Tools:
7467 iASL: Fixed a problem with the use of the Alias operator and Resource
7468 Templates. The correct alias is now constructed and no error is emitted.
7471 iASL: Implemented the -I option to specify additional search directories
7473 include files. Allows multiple additional search paths for include files.
7474 Directories are searched in the order specified on the command line
7476 the local directory is searched.) ACPICA BZ 800.
7478 iASL: Fixed a problem where the full pathname for include files was not
7479 emitted for warnings/errors. This caused the IDE support to not work
7480 properly. ACPICA BZ 765.
7482 iASL: Implemented the -@ option to specify a Windows-style response file
7483 containing additional command line options. ACPICA BZ 801.
7485 AcpiExec: Added support to load multiple AML files simultaneously (such
7488 DSDT and multiple SSDTs). Also added support for wildcards within the AML
7489 pathname. These features allow all machine tables to be easily loaded and
7490 debugged together. ACPICA BZ 804.
7492 Disassembler: Added missing support for disassembly of HEST table Error
7496 ----------------------------------------
7497 30 July 2009. Summary of changes for version 20090730:
7499 The ACPI 4.0 implementation for ACPICA is complete with this release.
7501 1) ACPI CA Core Subsystem:
7503 ACPI 4.0: Added header file support for all new and changed ACPI tables.
7504 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
7506 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
7508 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
7510 have been some ACPI 4.0 changes to other existing tables. Split the large
7511 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
7513 ACPI 4.0: Implemented predefined name validation for all new names. There
7515 31 new names in ACPI 4.0. The predefined validation module was split into
7517 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
7519 Implemented support for so-called "module-level executable code". This is
7520 executable AML code that exists outside of any control method and is
7522 to be executed at table load time. Although illegal since ACPI 2.0, this
7524 of code still exists and is apparently still being created. Blocks of
7526 code are now detected and executed as intended. Currently, the code
7528 must exist under either an If, Else, or While construct; these are the
7529 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
7531 Implemented an automatic dynamic repair for predefined names that return
7532 nested Package objects. This applies to predefined names that are defined
7534 return a variable-length Package of sub-packages. If the number of sub-
7535 packages is one, BIOS code is occasionally seen that creates a simple
7537 package with no sub-packages. This code attempts to fix the problem by
7538 wrapping a new package object around the existing package. These methods
7540 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
7544 Fixed a regression introduced in 20090625 for the AcpiGetDevices
7546 The _HID/_CID matching was broken and no longer matched IDs correctly.
7550 Fixed a problem with AcpiReset where the reset would silently fail if the
7551 register was one of the protected I/O ports. AcpiReset now bypasses the
7553 validation mechanism. This may eventually be driven into the
7557 Fixed a regression related to the recent update of the AcpiRead/Write
7558 interfaces. A sleep/suspend could fail if the optional PM2 Control
7560 does not exist during an attempt to write the Bus Master Arbitration bit.
7561 (However, some hosts already delete the code that writes this bit, and
7563 code may in fact be obsolete at this date.) ACPICA BZ 799.
7565 Fixed a problem where AcpiTerminate could fault if inadvertently called
7567 in succession. ACPICA BZ 795.
7569 Example Code and Data Size: These are the sizes for the OS-independent
7570 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7571 debug version of the code includes the debug output trace mechanism and
7573 much larger code and data size.
7576 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
7577 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
7579 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7580 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7582 2) iASL Compiler/Disassembler and Tools:
7584 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
7585 changes to existing tables. ACPICA BZ 775.
7587 ----------------------------------------
7588 25 June 2009. Summary of changes for version 20090625:
7590 The ACPI 4.0 Specification was released on June 16 and is available at
7591 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
7592 continue for the next few releases.
7594 1) ACPI CA Core Subsystem:
7596 ACPI 4.0: Implemented interpreter support for the IPMI operation region
7597 address space. Includes support for bi-directional data buffers and an
7599 address space handler (to be installed by an IPMI device driver.) ACPICA
7603 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
7605 support in both the header files and the disassembler.
7607 Completed a major update for the AcpiGetObjectInfo external interface.
7609 - Support for variable, unlimited length HID, UID, and CID strings.
7610 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
7612 - Call the _SxW power methods on behalf of a device object.
7613 - Determine if a device is a PCI root bridge.
7614 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
7615 These changes will require an update to all callers of this interface.
7617 the updated ACPICA Programmer Reference for details. One new source file
7619 been added - utilities/utids.c. ACPICA BZ 368, 780.
7621 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
7622 transfers. The Value parameter has been extended from 32 bits to 64 bits
7624 order to support new ACPI 4.0 tables. These changes will require an
7627 all callers of these interfaces. See the ACPICA Programmer Reference for
7628 details. ACPICA BZ 768.
7630 Fixed several problems with AcpiAttachData. The handler was not invoked
7632 the host node was deleted. The data sub-object was not automatically
7634 when the host node was deleted. The interface to the handler had an
7636 parameter, this was removed. ACPICA BZ 778.
7638 Enhanced the function that dumps ACPI table headers. All non-printable
7639 characters in the string fields are now replaced with '?' (Signature,
7641 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
7642 these fields are occasionally seen in the field. ACPICA BZ 788.
7644 Fixed a problem with predefined method repair code where the code that
7645 attempts to repair/convert an object of incorrect type is only executed
7647 the first time the predefined method is called. The mechanism that
7649 warnings on subsequent calls was interfering with the repair mechanism.
7652 Fixed a possible memory leak in the predefined validation/repair code
7655 buffer is automatically converted to an expected string object.
7657 Removed obsolete 16-bit files from the distribution and from the current
7659 tree head. ACPICA BZ 776.
7661 Example Code and Data Size: These are the sizes for the OS-independent
7662 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7663 debug version of the code includes the debug output trace mechanism and
7665 much larger code and data size.
7668 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
7669 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
7671 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
7672 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
7674 2) iASL Compiler/Disassembler and Tools:
7676 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
7677 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
7679 ACPI 4.0: iASL - implemented compile-time validation support for all new
7680 predefined names and control methods (31 total). ACPICA BZ 769.
7682 ----------------------------------------
7683 21 May 2009. Summary of changes for version 20090521:
7685 1) ACPI CA Core Subsystem:
7687 Disabled the preservation of the SCI enable bit in the PM1 control
7689 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
7692 a "preserved" bit - "OSPM always preserves this bit position", section
7693 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
7694 because the bit needs to be explicitly set by the OS as a workaround. No
7695 machines fail if the bit is not preserved. Therefore, ACPICA no longer
7696 attempts to preserve this bit.
7698 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
7699 incorrectly formed _PRT package could cause a fault. Added validation to
7700 ensure that each package element is actually a sub-package.
7702 Implemented a new interface to install or override a single control
7704 AcpiInstallMethod. This interface is useful when debugging in order to
7706 an existing method or to install a missing method without having to
7708 the entire ACPI table. See the ACPICA Programmer Reference for use and
7709 examples. Lin Ming, Bob Moore.
7711 Fixed several reference count issues with the DdbHandle object that is
7712 created from a Load or LoadTable operator. Prevent premature deletion of
7714 object. Also, mark the object as invalid once the table has been
7716 This is needed because the handle itself may not be deleted after the
7718 unload, depending on whether it has been stored in a named object by the
7721 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
7722 mutexes of the same sync level are acquired but then not released in
7724 opposite order, the internally maintained Current Sync Level becomes
7726 and can cause subsequent execution errors. ACPICA BZ 471.
7728 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
7729 specification has been changed to make the SyncLevel for mutex objects
7731 useful. When releasing a mutex, the SyncLevel of the mutex must now be
7733 same as the current sync level. This makes more sense than the previous
7735 (SyncLevel less than or equal). This change updates the code to match the
7738 Fixed a problem with the local version of the AcpiOsPurgeCache function.
7740 (local) cache must be locked during all cache object deletions. Andrew
7743 Updated the Load operator to use operation region interfaces. This
7745 direct memory mapping with region access calls. Now, all region accesses
7747 through the installed region handler as they should.
7749 Simplified and optimized the NsGetNextNode function. Reduced parameter
7751 and reduced code for this frequently used function.
7753 Example Code and Data Size: These are the sizes for the OS-independent
7754 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7755 debug version of the code includes the debug output trace mechanism and
7757 much larger code and data size.
7760 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
7761 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
7763 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
7764 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
7766 2) iASL Compiler/Disassembler and Tools:
7768 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
7770 with sub-table disassembly and handling invalid sub-tables. Attempt
7772 after an invalid sub-table ID.
7774 ----------------------------------------
7775 22 April 2009. Summary of changes for version 20090422:
7777 1) ACPI CA Core Subsystem:
7779 Fixed a compatibility issue with the recently released I/O port
7781 mechanism. For windows compatibility, 1) On a port protection violation,
7782 simply ignore the request and do not return an exception (allow the
7784 method to continue execution.) 2) If only part of the request overlaps a
7785 protected port, read/write the individual ports that are not protected.
7789 Enhanced the execution of the ASL/AML BreakPoint operator so that it
7791 breaks into the AML debugger if the debugger is present. This matches the
7792 ACPI-defined behavior.
7794 Fixed several possible warnings related to the use of the configurable
7795 ACPI_THREAD_ID. This type can now be configured as either an integer or a
7796 pointer with no warnings. Also fixes several warnings in printf-like
7797 statements for the 64-bit build when the type is configured as a pointer.
7800 Fixed a number of possible warnings when compiling with gcc 4+ (depending
7802 warning options.) Examples include printf formats, aliasing, unused
7804 missing prototypes, missing switch default statements, use of non-ANSI
7805 library functions, use of non-ANSI constructs. See generate/unix/Makefile
7807 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
7809 Example Code and Data Size: These are the sizes for the OS-independent
7810 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7811 debug version of the code includes the debug output trace mechanism and
7813 much larger code and data size.
7816 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
7817 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
7819 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
7820 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
7822 2) iASL Compiler/Disassembler and Tools:
7824 iASL: Fixed a generation warning from Bison 2.3 and fixed several
7829 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
7831 correctly digest Windows/DOS formatted files (with CR/LF).
7833 iASL: Added a new option for "quiet mode" (-va) that produces only the
7834 compilation summary, not individual errors and warnings. Useful for large
7837 AcpiExec: Implemented a new option (-z) to enable a forced
7839 timeout that can be used to detect hang conditions during execution of
7841 code (includes both internal semaphores and AML-defined mutexes and
7844 Added new makefiles for the generation of acpica in a generic unix-like
7845 environment. These makefiles are intended to generate the acpica tools
7847 utilities from the original acpica git source tree structure.
7849 Test Suites: Updated and cleaned up the documentation files. Updated the
7850 copyrights to 2009, affecting all source files. Use the new version of
7852 with quiet mode. Increased the number of available semaphores in the
7854 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
7856 an alternate implementation of the semaphore timeout to allow aslts to
7857 execute fully on Cygwin.
7859 ----------------------------------------
7860 20 March 2009. Summary of changes for version 20090320:
7862 1) ACPI CA Core Subsystem:
7864 Fixed a possible race condition between AcpiWalkNamespace and dynamic
7866 unloads. Added a reader/writer locking mechanism to allow multiple
7868 namespace walks (readers), but block a dynamic table unload until it can
7870 exclusive write access to the namespace. This fixes a problem where a
7872 unload could (possibly catastrophically) delete the portion of the
7874 that is currently being examined by a walk. Adds a new file, utlock.c,
7876 implements the reader/writer lock mechanism. ACPICA BZ 749.
7878 Fixed a regression introduced in version 20090220 where a change to the
7880 handling could cause the ACPICA subsystem to access non-existent I/O
7883 Modified the handling of FADT register and table (FACS/DSDT) addresses.
7885 FADT can contain both 32-bit and 64-bit versions of these addresses.
7886 Previously, the 64-bit versions were favored, meaning that if both 32 and
7888 versions were valid, but not equal, the 64-bit version was used. This was
7889 found to cause some machines to fail. Now, in this case, the 32-bit
7891 is used instead. This now matches the Windows behavior.
7893 Implemented a new mechanism to protect certain I/O ports. Provides
7895 compatibility and protects the standard PC I/O ports from access via AML
7896 code. Adds a new file, hwvalid.c
7898 Fixed a possible extraneous warning message from the FADT support. The
7899 message warns of a 32/64 length mismatch between the legacy and GAS
7900 definitions for a register.
7902 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
7904 made obsolete by the port protection mechanism above. It was previously
7906 to validate the entire address range of an operation region, which could
7908 incorrect if the range included illegal ports, but fields within the
7909 operation region did not actually access those ports. Validation is now
7910 performed on a per-field basis instead of the entire region.
7912 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
7913 Ignored bits must be "preserved" according to the ACPI spec. Usually,
7915 means a read/modify/write when writing to the register. However, for
7917 registers, writing a one means clear the event. Writing a zero means
7919 the event (do not clear.) This behavior is clarified in the ACPI 4.0
7921 and the ACPICA code now simply always writes a zero to the ignored bit.
7923 Modified the handling of ignored bits for the PM1 A/B Control Registers.
7925 per the ACPI specification, for the control registers, preserve
7926 (read/modify/write) all bits that are defined as either reserved or
7929 Updated the handling of write-only bits in the PM1 A/B Control Registers.
7930 When reading the register, zero the write-only bits as per the ACPI spec.
7931 ACPICA BZ 443. Lin Ming.
7933 Removed "Linux" from the list of supported _OSI strings. Linux no longer
7934 wants to reply true to this request. The Windows strings are the only
7936 through the AML that are tested and known to work properly.
7939 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
7940 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
7942 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
7943 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
7945 2) iASL Compiler/Disassembler and Tools:
7947 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
7951 ----------------------------------------
7952 20 February 2009. Summary of changes for version 20090220:
7954 1) ACPI CA Core Subsystem:
7956 Optimized the ACPI register locking. Removed locking for reads from the
7958 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
7960 not required when reading the single-bit registers. The
7961 AcpiGetRegisterUnlocked function is no longer needed and has been
7963 This will improve performance for reads on these registers. ACPICA BZ
7966 Fixed the parameter validation for AcpiRead/Write. Now return
7967 AE_BAD_PARAMETER if the input register pointer is null, and
7970 the register has an address of zero. Previously, these cases simply
7972 AE_OK. For optional registers such as PM1B status/enable/control, the
7974 should check for a valid register address before calling. ACPICA BZ 748.
7976 Renamed the external ACPI bit register access functions. Renamed
7977 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
7978 functions. The new names are AcpiReadBitRegister and
7979 AcpiWriteBitRegister.
7980 Also, restructured the code for these functions by simplifying the code
7982 and condensing duplicate code to reduce code size.
7984 Added new functions to transparently handle the possibly split PM1 A/B
7985 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
7987 now handle the split registers for PM1 Status, Enable, and Control.
7992 Added a function to handle the PM1 control registers,
7993 AcpiHwWritePm1Control.
7994 This function writes both of the PM1 control registers (A/B). These
7996 are different than the PM1 A/B status and enable registers in that
7998 values can be written to the A/B registers. Most notably, the SLP_TYP
8000 can be different, as per the values returned from the _Sx predefined
8003 Removed an extra register write within AcpiHwClearAcpiStatus. This
8005 was writing an optional PM1B status register twice. The existing call to
8007 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
8009 register. ACPICA BZ 751.
8011 Split out the PM1 Status registers from the FADT. Added new globals for
8013 registers (A/B), similar to the way the PM1 Enable registers are handled.
8014 Instead of overloading the FADT Event Register blocks. This makes the
8016 clearer and less prone to error.
8018 Fixed the warning message for when the platform contains too many ACPI
8020 for the default size of the global root table data structure. The
8022 for the truncation value was incorrect.
8024 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
8025 obsolete macro, since it is now a simple reference to ->common.type.
8027 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
8029 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
8030 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
8031 simply SLEEP_TYPE. ACPICA BZ 754.
8033 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
8034 function is only needed on 64-bit host operating systems and is thus not
8035 included for 32-bit hosts.
8037 Debug output: print the input and result for invocations of the _OSI
8039 control method via the ACPI_LV_INFO debug level. Also, reduced some of
8041 verbosity of this debug level. Len Brown.
8043 Example Code and Data Size: These are the sizes for the OS-independent
8044 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8045 debug version of the code includes the debug output trace mechanism and
8047 much larger code and data size.
8050 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8051 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8053 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8054 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8056 2) iASL Compiler/Disassembler and Tools:
8058 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
8059 various legal performance profiles.
8061 ----------------------------------------
8062 23 January 2009. Summary of changes for version 20090123:
8064 1) ACPI CA Core Subsystem:
8066 Added the 2009 copyright to all module headers and signons. This affects
8067 virtually every file in the ACPICA core subsystem, the iASL compiler, and
8068 the tools/utilities.
8070 Implemented a change to allow the host to override any ACPI table,
8072 dynamically loaded tables. Previously, only the DSDT could be replaced by
8074 host. With this change, the AcpiOsTableOverride interface is called for
8076 table found in the RSDT/XSDT during ACPICA initialization, and also
8078 a table is dynamically loaded via the AML Load operator.
8080 Updated FADT flag definitions, especially the Boot Architecture flags.
8082 Debugger: For the Find command, automatically pad the input ACPI name
8084 underscores if the name is shorter than 4 characters. This enables a
8086 with the actual namespace entry which is itself padded with underscores.
8088 Example Code and Data Size: These are the sizes for the OS-independent
8089 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8090 debug version of the code includes the debug output trace mechanism and
8092 much larger code and data size.
8095 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8096 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8098 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8099 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8101 2) iASL Compiler/Disassembler and Tools:
8103 Fix build error under Bison-2.4.
8105 Dissasembler: Enhanced FADT support. Added decoding of the Boot
8107 flags. Now decode all flags, regardless of the FADT version. Flag output
8108 includes the FADT version which first defined each flag.
8110 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
8112 DSDT). Windows only.
8114 ----------------------------------------
8115 04 December 2008. Summary of changes for version 20081204:
8117 1) ACPI CA Core Subsystem:
8119 The ACPICA Programmer Reference has been completely updated and revamped
8121 this release. This includes updates to the external interfaces, OSL
8122 interfaces, the overview sections, and the debugger reference.
8124 Several new ACPICA interfaces have been implemented and documented in the
8125 programmer reference:
8126 AcpiReset - Writes the reset value to the FADT-defined reset register.
8127 AcpiDisableAllGpes - Disable all available GPEs.
8128 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
8129 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
8130 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
8131 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
8132 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
8134 Most of the public ACPI hardware-related interfaces have been moved to a
8136 file, components/hardware/hwxface.c
8138 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
8139 register lengths within the FADT are now used, and the low level ACPI
8140 register access no longer hardcodes the ACPI register lengths. Given that
8141 there may be some risk in actually trusting the FADT register lengths, a
8143 time option was added to fall back to the default hardcoded lengths if
8145 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
8146 option is set to true for now, and a warning is issued if a suspicious
8148 register length is overridden with the default value.
8150 Fixed a reference count issue in NsRepairObject. This problem was
8152 in version 20081031 as part of a fix to repair Buffer objects within
8155 Added semaphore support to the Linux/Unix application OS-services layer
8156 (OSL). ACPICA BZ 448. Lin Ming.
8158 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
8160 be implemented in the OSL, or will binary semaphores be used instead.
8162 Example Code and Data Size: These are the sizes for the OS-independent
8163 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8164 debug version of the code includes the debug output trace mechanism and
8166 much larger code and data size.
8169 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8170 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8172 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8173 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8175 2) iASL Compiler/Disassembler and Tools:
8177 iASL: Completed the '-e' option to include additional ACPI tables in
8180 aid with disassembly and External statement generation. ACPICA BZ 742.
8184 iASL: Removed the "named object in while loop" error. The compiler cannot
8185 determine how many times a loop will execute. ACPICA BZ 730.
8187 Disassembler: Implemented support for FADT revision 2 (MS extension).
8191 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
8194 ----------------------------------------
8195 31 October 2008. Summary of changes for version 20081031:
8197 1) ACPI CA Core Subsystem:
8199 Restructured the ACPICA header files into public/private. acpi.h now
8201 only the "public" acpica headers. All other acpica headers are "private"
8203 should not be included by acpica users. One new file, accommon.h is used
8205 include the commonly used private headers for acpica code generation.
8207 plans include moving all private headers to a new subdirectory.
8209 Implemented an automatic Buffer->String return value conversion for
8210 predefined ACPI methods. For these methods (such as _BIF), added
8212 conversion for return objects that are required to be a String, but a
8214 was found instead. This can happen when reading string battery data from
8216 operation region, because it used to be difficult to convert the data
8218 buffer to string from within the ASL. Ensures that the host OS is
8220 with a valid null-terminated string. Linux BZ 11822.
8222 Updated the FACS waking vector interfaces. Split
8223 AcpiSetFirmwareWakingVector
8224 into two: one for the 32-bit vector, another for the 64-bit vector. This
8226 required because the host OS must setup the wake much differently for
8228 vector (real vs. protected mode, etc.) and the interface itself should
8231 deciding which vector to use. Also, eliminated the
8232 GetFirmwareWakingVector
8233 interface, as it served no purpose (only the firmware reads the vector,
8235 only writes the vector.) ACPICA BZ 731.
8237 Implemented a mechanism to escape infinite AML While() loops. Added a
8239 counter to force exit from AML While loops if the count becomes too
8241 This can occur in poorly written AML when the hardware does not respond
8242 within a while loop and the loop does not implement a timeout. The
8244 loop count is configurable. A new exception code is returned when a loop
8246 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
8248 Optimized the execution of AML While loops. Previously, a control state
8249 object was allocated and freed for each execution of the loop. The
8250 optimization is to simply reuse the control state for each iteration.
8252 speeds up the raw loop execution time by about 5%.
8254 Enhanced the implicit return mechanism. For Windows compatibility, return
8256 implicit integer of value zero for methods that contain no executable
8258 Such methods are seen in the field as stubs (presumably), and can cause
8259 drivers to fail if they expect a return value. Lin Ming.
8261 Allow multiple backslashes as root prefixes in namepaths. In a fully
8262 qualified namepath, allow multiple backslash prefixes. This can happen
8264 is seen in the field) because of the use of a double-backslash in strings
8265 (since backslash is the escape character) causing confusion. ACPICA BZ
8269 Emit a warning if two different FACS or DSDT tables are discovered in the
8270 FADT. Checks if there are two valid but different addresses for the FACS
8272 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
8274 Consolidated the method argument count validation code. Merged the code
8276 validates control method argument counts into the predefined validation
8277 module. Eliminates possible multiple warnings for incorrect argument
8280 Implemented ACPICA example code. Includes code for ACPICA initialization,
8281 handler installation, and calling a control method. Available at
8282 source/tools/examples.
8284 Added a global pointer for FACS table to simplify internal FACS access.
8286 the global pointer instead of using AcpiGetTableByIndex for each FACS
8288 This simplifies the code for the Global Lock and the Firmware Waking
8291 Example Code and Data Size: These are the sizes for the OS-independent
8292 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8293 debug version of the code includes the debug output trace mechanism and
8295 much larger code and data size.
8298 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8299 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8301 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8302 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8304 2) iASL Compiler/Disassembler and Tools:
8306 iASL: Improved disassembly of external method calls. Added the -e option
8308 allow the inclusion of additional ACPI tables to help with the
8311 method invocations and the generation of external declarations during the
8312 disassembly. Certain external method invocations cannot be disassembled
8313 properly without the actual declaration of the method. Use the -e option
8315 include the table where the external method(s) are actually declared.
8317 useful for disassembling SSDTs that make method calls back to the master
8318 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
8320 -e dsdt.aml ssdt1.aml
8322 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
8323 problem where the use of an alias within a namepath would result in a not
8324 found error or cause the compiler to fault. Also now allows forward
8325 references from the Alias operator itself. ACPICA BZ 738.
8327 ----------------------------------------
8328 26 September 2008. Summary of changes for version 20080926:
8330 1) ACPI CA Core Subsystem:
8332 Designed and implemented a mechanism to validate predefined ACPI methods
8334 objects. This code validates the predefined ACPI objects (objects whose
8336 start with underscore) that appear in the namespace, at the time they are
8337 evaluated. The argument count and the type of the returned object are
8338 validated against the ACPI specification. The purpose of this validation
8340 to detect problems with the BIOS-implemented predefined ACPI objects
8342 the results are returned to the ACPI-related drivers. Future enhancements
8344 include actual repair of incorrect return objects where possible. Two new
8345 files are nspredef.c and acpredef.h.
8347 Fixed a fault in the AML parser if a memory allocation fails during the
8349 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
8351 Fixed an issue with implicit return compatibility. This change improves
8353 implicit return mechanism to be more compatible with the MS interpreter.
8355 Ming, ACPICA BZ 349.
8357 Implemented support for zero-length buffer-to-string conversions. Allow
8359 length strings during interpreter buffer-to-string conversions. For
8361 during the ToDecimalString and ToHexString operators, as well as implicit
8362 conversions. Fiodor Suietov, ACPICA BZ 585.
8364 Fixed two possible memory leaks in the error exit paths of
8365 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
8367 similar in that they use a stack of state objects in order to eliminate
8368 recursion. The stack must be fully unwound and deallocated if an error
8369 occurs. Lin Ming. ACPICA BZ 383.
8371 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
8373 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
8374 Moore ACPICA BZ 442.
8376 Removed the obsolete version number in module headers. Removed the
8377 "$Revision" number that appeared in each module header. This version
8379 was useful under SourceSafe and CVS, but has no meaning under git. It is
8381 only incorrect, it could also be misleading.
8383 Example Code and Data Size: These are the sizes for the OS-independent
8384 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8385 debug version of the code includes the debug output trace mechanism and
8387 much larger code and data size.
8390 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8391 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8393 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8394 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8396 ----------------------------------------
8397 29 August 2008. Summary of changes for version 20080829:
8399 1) ACPI CA Core Subsystem:
8401 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
8402 Reference. Changes include the elimination of cheating on the Object
8404 for the DdbHandle subtype, addition of a reference class field to
8405 differentiate the various reference types (instead of an AML opcode), and
8407 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
8409 Reduce an error to a warning for an incorrect method argument count.
8410 Previously aborted with an error if too few arguments were passed to a
8411 control method via the external ACPICA interface. Now issue a warning
8413 and continue. Handles the case where the method inadvertently declares
8415 many arguments, but does not actually use the extra ones. Applies mainly
8417 the predefined methods. Lin Ming. Linux BZ 11032.
8419 Disallow the evaluation of named object types with no intrinsic value.
8421 AE_TYPE for objects that have no value and therefore evaluation is
8423 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
8425 these types were allowed, but an exception would be generated at some
8427 during the evaluation. Now, the error is generated up front.
8429 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
8430 (nsnames.c). Fixes a leak in the error exit path.
8432 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
8434 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
8436 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
8439 Removed obsolete and/or unused exception codes from the acexcep.h header.
8440 There is the possibility that certain device drivers may be affected if
8442 use any of these exceptions.
8444 The ACPICA documentation has been added to the public git source tree,
8446 acpica/documents. Included are the ACPICA programmer reference, the iASL
8447 compiler reference, and the changes.txt release logfile.
8449 Example Code and Data Size: These are the sizes for the OS-independent
8450 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8451 debug version of the code includes the debug output trace mechanism and
8453 much larger code and data size.
8456 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8457 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8459 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8460 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8462 2) iASL Compiler/Disassembler and Tools:
8464 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
8465 defines _SCP with 3 arguments. Previous versions defined it with only 1
8466 argument. iASL now allows both definitions.
8468 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
8470 length subtables when disassembling ACPI tables. Also fixed a couple of
8471 errors where a full 16-bit table type field was not extracted from the
8475 acpisrc: Improve comment counting mechanism for generating source code
8476 statistics. Count first and last lines of multi-line comments as
8478 not comment lines. Handle Linux legal header in addition to standard
8482 ----------------------------------------
8484 29 July 2008. Summary of changes for version 20080729:
8486 1) ACPI CA Core Subsystem:
8488 Fix a possible deadlock in the GPE dispatch. Remove call to
8489 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
8491 to acquire the GPE lock but can deadlock since the GPE lock is already
8493 at dispatch time. This code was introduced in version 20060831 as a
8495 to Linux BZ 6881 and has since been removed from Linux.
8497 Add a function to dereference returned reference objects. Examines the
8499 object from a call to AcpiEvaluateObject. Any Index or RefOf references
8501 automatically dereferenced in an attempt to return something useful
8503 reference types cannot be converted into an external ACPI_OBJECT.)
8505 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
8507 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
8508 subtables for the MADT and one new subtable for the SRAT. Includes
8509 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
8511 Specification, June 2008.
8513 Additional error checking for pathname utilities. Add error check after
8515 calls to AcpiNsGetPathnameLength. Add status return from
8516 AcpiNsBuildExternalPath and check after all calls. Add parameter
8518 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
8520 Return status from the global init function AcpiUtGlobalInitialize. This
8522 used by both the kernel subsystem and the utilities such as iASL
8524 The function could possibly fail when the caches are initialized. Yang
8527 Add a function to decode reference object types to strings. Created for
8528 improved error messages.
8530 Improve object conversion error messages. Better error messages during
8532 conversion from internal to the external ACPI_OBJECT. Used for external
8534 to AcpiEvaluateObject.
8536 Example Code and Data Size: These are the sizes for the OS-independent
8537 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8538 debug version of the code includes the debug output trace mechanism and
8540 much larger code and data size.
8543 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
8544 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8546 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8547 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8549 2) iASL Compiler/Disassembler and Tools:
8551 Debugger: fix a possible hang when evaluating non-methods. Fixes a
8553 introduced in version 20080701. If the object being evaluated (via
8555 command) is not a method, the debugger can hang while trying to obtain
8557 existent parameters.
8559 iASL: relax error for using reserved "_T_x" identifiers. These names can
8560 appear in a disassembled ASL file if they were emitted by the original
8561 compiler. Instead of issuing an error or warning and forcing the user to
8562 manually change these names, issue a remark instead.
8564 iASL: error if named object created in while loop. Emit an error if any
8566 object is created within a While loop. If allowed, this code will
8569 run-time error on the second iteration of the loop when an attempt is
8572 create the same named object twice. ACPICA bugzilla 730.
8574 iASL: Support absolute pathnames for include files. Add support for
8576 pathnames within the Include operator. previously, only relative
8580 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
8582 The ACPI spec requires one interrupt minimum. BZ 423
8584 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
8585 Handles the case for the Interrupt Resource Descriptor where
8586 the ResourceSource argument is omitted but ResourceSourceIndex
8587 is present. Now leave room for the Index. BZ 426
8589 iASL: Prevent error message if CondRefOf target does not exist. Fixes
8591 where an error message is emitted if the target does not exist. BZ 516
8593 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
8594 (get ACPI tables on Windows). This was apparently broken in version
8597 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
8599 the EOF happens immediately after the last table in the input file. Print
8600 completion message. Previously, no message was displayed in this case.
8602 ----------------------------------------
8603 01 July 2008. Summary of changes for version 20080701:
8605 0) Git source tree / acpica.org
8607 Fixed a problem where a git-clone from http would not transfer the entire
8610 1) ACPI CA Core Subsystem:
8612 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
8613 enable bit. Now performs a read-change-write of the enable register
8615 of simply writing out the cached enable mask. This will prevent
8617 enabling of GPEs if a rogue GPE is received during initialization (before
8619 handlers are installed.)
8621 Implemented a copy for dynamically loaded tables. Previously, dynamically
8622 loaded tables were simply mapped - but on some machines this memory is
8623 corrupted after suspend. Now copy the table to a local buffer. For the
8624 OpRegion case, added checksum verify. Use the table length from the table
8625 header, not the region length. For the Buffer case, use the table length
8626 also. Dennis Noordsij, Bob Moore. BZ 10734
8628 Fixed a problem where the same ACPI table could not be dynamically loaded
8630 unloaded more than once. Without this change, a table cannot be loaded
8632 once it has been loaded/unloaded one time. The current mechanism does not
8633 unregister a table upon an unload. During a load, if the same table is
8635 this no longer returns an exception. BZ 722
8637 Fixed a problem where the wrong descriptor length was calculated for the
8638 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
8640 are calculated as 12 bytes long, but the actual length in the internal
8641 descriptor is 16 because of the round-up to 8 on the 64-bit build.
8643 by Linn Crosetto. BZ 728
8645 Fixed a possible memory leak in the Unload operator. The DdbHandle
8647 by Load() did not have its reference count decremented during unload,
8649 to a memory leak. Lin Ming. BZ 727
8651 Fixed a possible memory leak when deleting thermal/processor objects. Any
8652 associated notify handlers (and objects) were not being deleted. Fiodor
8655 Fixed the ordering of the ASCII names in the global mutex table to match
8657 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
8659 Vegard Nossum. BZ 726
8661 Enhanced the AcpiGetObjectInfo interface to return the number of required
8662 arguments if the object is a control method. Added this call to the
8664 so the proper number of default arguments are passed to a method. This
8665 prevents a warning when executing methods from AcpiExec.
8667 Added a check for an invalid handle in AcpiGetObjectInfo. Return
8668 AE_BAD_PARAMETER if input handle is invalid. BZ 474
8670 Fixed an extraneous warning from exconfig.c on the 64-bit build.
8672 Example Code and Data Size: These are the sizes for the OS-independent
8673 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8674 debug version of the code includes the debug output trace mechanism and
8676 much larger code and data size.
8679 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
8680 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
8682 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
8683 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8685 2) iASL Compiler/Disassembler and Tools:
8687 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
8688 resource descriptor names.
8690 iASL: Detect invalid ASCII characters in input (windows version). Removed
8692 "-CF" flag from the flex compile, enables correct detection of non-ASCII
8693 characters in the input. BZ 441
8695 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
8697 "result of operation not used" warning when the DDB handle returned from
8698 LoadTable is not used. The warning is not needed. BZ 590
8700 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
8703 pass address of table to the AML. Added option to disable OpRegion
8705 to allow creation of an OpRegion with a real address that was passed to
8707 All of this allows testing of the Load and Unload operators from
8710 Debugger: update tables command for unloaded tables. Handle unloaded
8712 and use the standard table header output routine.
8714 ----------------------------------------
8715 09 June 2008. Summary of changes for version 20080609:
8717 1) ACPI CA Core Subsystem:
8719 Implemented a workaround for reversed _PRT entries. A significant number
8721 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
8722 change dynamically detects and repairs this problem. Provides
8724 with MS ACPI. BZ 6859
8726 Simplified the internal ACPI hardware interfaces to eliminate the locking
8727 flag parameter from Register Read/Write. Added a new external interface,
8728 AcpiGetRegisterUnlocked.
8730 Fixed a problem where the invocation of a GPE control method could hang.
8732 was a regression introduced in 20080514. The new method argument count
8733 validation mechanism can enter an infinite loop when a GPE method is
8734 dispatched. Problem fixed by removing the obsolete code that passed GPE
8736 information to the notify handler via the control method parameter
8739 Fixed a problem where the _SST execution status was incorrectly returned
8741 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
8743 20080514. _SST is optional and a NOT_FOUND exception should never be
8746 Fixed a problem where a deleted object could be accessed from within the
8748 parser. This was a regression introduced in version 20080123 as a fix for
8750 Unload operator. Lin Ming. BZ 10669
8752 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
8754 and eliminated the use of a negative index in a loop. Operands are now
8755 displayed in the correct order, not backwards. This also fixes a
8757 introduced in 20080514 on 64-bit systems where the elimination of
8758 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
8761 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
8763 path did not delete a locally allocated structure.
8765 Updated definitions for the DMAR and SRAT tables to synchronize with the
8766 current specifications. Includes disassembler support.
8768 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
8769 loop termination value was used. Loop terminated on iteration early,
8771 one mutex. Linn Crosetto
8773 Example Code and Data Size: These are the sizes for the OS-independent
8774 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8775 debug version of the code includes the debug output trace mechanism and
8777 much larger code and data size.
8780 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
8781 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
8783 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
8784 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
8786 2) iASL Compiler/Disassembler and Tools:
8788 Disassembler: Implemented support for EisaId() within _CID objects. Now
8789 disassemble integer _CID objects back to EisaId invocations, including
8790 multiple integers within _CID packages. Includes single-step support for
8793 Disassembler: Added support for DMAR and SRAT table definition changes.
8795 ----------------------------------------
8796 14 May 2008. Summary of changes for version 20080514:
8798 1) ACPI CA Core Subsystem:
8800 Fixed a problem where GPEs were enabled too early during the ACPICA
8801 initialization. This could lead to "handler not installed" errors on some
8802 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
8804 ensures that all operation regions and devices throughout the namespace
8806 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
8808 Implemented a change to the enter sleep code. Moved execution of the _GTS
8809 method to just before setting sleep enable bit. The execution was moved
8811 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
8812 immediately before the SLP_EN bit is set, as per the ACPI specification.
8815 Implemented a fix to disable unknown GPEs (2nd version). Now always
8817 the GPE, even if ACPICA thinks that that it is already disabled. It is
8818 possible that the AML or some other code has enabled the GPE unbeknownst
8822 Fixed a problem with the Field operator where zero-length fields would
8824 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
8826 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
8828 Implemented a fix for the Load operator, now load the table at the
8830 root. This reverts a change introduced in version 20071019. The table is
8832 loaded at the namespace root even though this goes against the ACPI
8833 specification. This provides compatibility with other ACPI
8835 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
8838 Fixed a problem where ACPICA would not Load() tables with unusual
8840 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
8841 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
8842 Therefore, signature validation is worthless. Apparently MS ACPI accepts
8844 signatures, ACPICA must be compatible. BZ 10454.
8846 Fixed a possible negative array index in AcpiUtValidateException. Added
8848 fields to the exception string arrays to eliminate a -1 subtraction on
8852 Updated the debug tracking macros to reduce overall code and data size.
8853 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
8854 instead of pointers to static strings. Jan Beulich and Bob Moore.
8856 Implemented argument count checking in control method invocation via
8857 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
8859 many. This applies only to extern programmatic control method execution,
8861 method-to-method calls within the AML. Lin Ming.
8863 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
8865 longer needed, especially with the removal of 16-bit support. It was
8867 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
8870 32/64-bit platforms is required.
8872 Added the C const qualifier for appropriate string constants -- mostly
8873 MODULE_NAME and printf format strings. Jan Beulich.
8875 Example Code and Data Size: These are the sizes for the OS-independent
8876 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8877 debug version of the code includes the debug output trace mechanism and
8879 much larger code and data size.
8882 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
8883 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
8885 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
8886 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
8888 2) iASL Compiler/Disassembler and Tools:
8890 Implemented ACPI table revision ID validation in the disassembler. Zero
8892 always invalid. For DSDTs, the ID controls the interpreter integer width.
8894 means 32-bit and this is unusual. 2 or greater is 64-bit.
8896 ----------------------------------------
8897 21 March 2008. Summary of changes for version 20080321:
8899 1) ACPI CA Core Subsystem:
8901 Implemented an additional change to the GPE support in order to suppress
8902 spurious or stray GPEs. The AcpiEvDisableGpe function will now
8904 disable incoming GPEs that are neither enabled nor disabled -- meaning
8906 the GPE is unknown to the system. This should prevent future interrupt
8908 from that GPE. BZ 6217 (Zhang Rui)
8910 Fixed a problem where NULL package elements were not returned to the
8911 AcpiEvaluateObject interface correctly. The element was simply ignored
8912 instead of returning a NULL ACPI_OBJECT package element, potentially
8914 a buffer overflow and/or confusing the caller who expected a fixed number
8916 elements. BZ 10132 (Lin Ming, Bob Moore)
8918 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
8920 Qword), Field, BankField, and IndexField operators when invoked from
8922 an executing control method. In this case, these operators created
8924 nodes that were incorrectly left marked as permanent nodes instead of
8925 temporary nodes. This could cause a problem if there is race condition
8926 between an exiting control method and a running namespace walk. (Reported
8930 Fixed a problem where the CreateField and CreateXXXField operators would
8931 incorrectly allow duplicate names (the name of the field) with no
8935 Implemented several changes for Notify handling. Added support for new
8937 values (ACPI 2.0+) and improved the Notify debug output. Notify on
8938 PowerResource objects is no longer allowed, as per the ACPI
8940 (Bob Moore, Zhang Rui)
8942 All Reference Objects returned via the AcpiEvaluateObject interface are
8944 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
8946 NULL objects - either NULL package elements or unresolved named
8949 Fixed a problem where an extraneous debug message was produced for
8951 objects (when debugging enabled). The message "Package List length larger
8952 than NumElements count" is now produced in the correct case, and is now
8954 error message rather than a debug message. Added a debug message for the
8955 opposite case, where NumElements is larger than the Package List (the
8957 will be padded out with NULL elements as per the ACPI spec.)
8959 Implemented several improvements for the output of the ASL "Debug" object
8961 clarify and keep all data for a given object on one output line.
8963 Fixed two size calculation issues with the variable-length Start
8965 resource descriptor.
8967 Example Code and Data Size: These are the sizes for the OS-independent
8968 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8969 debug version of the code includes the debug output trace mechanism and
8971 a much larger code and data size.
8974 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
8975 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
8977 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
8978 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
8980 2) iASL Compiler/Disassembler and Tools:
8982 Fixed a problem with the use of the Switch operator where execution of
8984 containing method by multiple concurrent threads could cause an
8985 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
8986 actual Switch opcode, it must be simulated with local named temporary
8987 variables and if/else pairs. The solution chosen was to mark any method
8989 uses Switch as Serialized, thus preventing multiple thread entries. BZ
8992 ----------------------------------------
8993 13 February 2008. Summary of changes for version 20080213:
8995 1) ACPI CA Core Subsystem:
8997 Implemented another MS compatibility design change for GPE/Notify
8999 GPEs are now cleared/enabled asynchronously to allow all pending notifies
9001 complete first. It is expected that the OSL will queue the enable request
9002 behind all pending notify requests (may require changes to the local host
9004 in AcpiOsExecute). Alexey Starikovskiy.
9006 Fixed a problem where buffer and package objects passed as arguments to a
9007 control method via the external AcpiEvaluateObject interface could cause
9009 AE_AML_INTERNAL exception depending on the order and type of operators
9010 executed by the target control method.
9012 Fixed a problem where resource descriptor size optimization could cause a
9013 problem when a _CRS resource template is passed to a _SRS method. The
9015 resource template must use the same descriptors (with the same size) as
9016 returned from _CRS. This change affects the following resource
9018 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
9021 Fixed a problem where a CopyObject to RegionField, BankField, and
9023 objects did not perform an implicit conversion as it should. These types
9025 retain their initial type permanently as per the ACPI specification.
9027 a CopyObject to all other object types should not perform an implicit
9028 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
9030 Fixed a problem with the AcpiGetDevices interface where the mechanism to
9031 match device CIDs did not examine the entire list of available CIDs, but
9032 instead aborted on the first non-matching CID. Andrew Patterson.
9034 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
9036 inadvertently changed to return a 16-bit value instead of a 32-bit value,
9037 truncating the upper dword of a 64-bit value. This macro is only used to
9038 display debug output, so no incorrect calculations were made. Also,
9039 reimplemented the macro so that a 64-bit shift is not performed by
9040 inefficient compilers.
9042 Added missing va_end statements that should correspond with each va_start
9045 Example Code and Data Size: These are the sizes for the OS-independent
9046 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9047 debug version of the code includes the debug output trace mechanism and
9049 a much larger code and data size.
9052 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9053 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9055 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9056 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9058 2) iASL Compiler/Disassembler and Tools:
9060 Implemented full disassembler support for the following new ACPI tables:
9061 BERT, EINJ, and ERST. Implemented partial disassembler support for the
9062 complicated HEST table. These tables support the Windows Hardware Error
9063 Architecture (WHEA).
9065 ----------------------------------------
9066 23 January 2008. Summary of changes for version 20080123:
9068 1) ACPI CA Core Subsystem:
9070 Added the 2008 copyright to all module headers and signons. This affects
9071 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9072 the tools/utilities.
9074 Fixed a problem with the SizeOf operator when used with Package and
9076 objects. These objects have deferred execution for some arguments, and
9078 execution is now completed before the SizeOf is executed. This problem
9080 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
9084 Implemented an enhancement to the interpreter "slack mode". In the
9087 an explicit return or an implicitly returned object from the last
9089 opcode, a control method will now implicitly return an integer of value 0
9091 Microsoft compatibility. (Lin Ming) BZ 392
9093 Fixed a problem with the Load operator where an exception was not
9096 the case where the table is already loaded. (Lin Ming) BZ 463
9098 Implemented support for the use of DDBHandles as an Indexed Reference, as
9100 the ACPI spec. (Lin Ming) BZ 486
9102 Implemented support for UserTerm (Method invocation) for the Unload
9104 as per the ACPI spec. (Lin Ming) BZ 580
9106 Fixed a problem with the LoadTable operator where the OemId and
9108 input strings could cause unexpected failures if they were shorter than
9110 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
9112 Implemented support for UserTerm (Method invocation) for the Unload
9114 as per the ACPI spec. (Lin Ming) BZ 580
9116 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
9118 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
9120 Example Code and Data Size: These are the sizes for the OS-independent
9121 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9122 debug version of the code includes the debug output trace mechanism and
9124 a much larger code and data size.
9127 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9128 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9130 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9131 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9133 2) iASL Compiler/Disassembler and Tools:
9135 Implemented support in the disassembler for checksum validation on
9137 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
9139 header dump at the start of the disassembly.
9141 Implemented additional debugging information in the namespace listing
9143 created during compilation. In addition to the namespace hierarchy, the
9145 pathname to each namespace object is displayed.
9147 Fixed a problem with the disassembler where invalid ACPI tables could
9149 faults or infinite loops.
9151 Fixed an unexpected parse error when using the optional "parameter types"
9152 list in a control method declaration. (Lin Ming) BZ 397
9154 Fixed a problem where two External declarations with the same name did
9156 cause an error (Lin Ming) BZ 509
9158 Implemented support for full TermArgs (adding Argx, Localx and method
9159 invocation) for the ParameterData parameter to the LoadTable operator.
9163 ----------------------------------------
9164 19 December 2007. Summary of changes for version 20071219:
9166 1) ACPI CA Core Subsystem:
9168 Implemented full support for deferred execution for the TermArg string
9169 arguments for DataTableRegion. This enables forward references and full
9170 operand resolution for the three string arguments. Similar to
9172 deferred argument execution.) Lin Ming. BZ 430
9174 Implemented full argument resolution support for the BankValue argument
9176 BankField. Previously, only constants were supported, now any TermArg may
9178 used. Lin Ming BZ 387, 393
9180 Fixed a problem with AcpiGetDevices where the search of a branch of the
9181 device tree could be terminated prematurely. In accordance with the ACPI
9182 specification, the search down the current branch is terminated if a
9184 is both not present and not functional (instead of just not present.)
9188 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
9190 the underlying AML code changed the GPE enable registers. Now, any
9192 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
9194 instead of simply ignored. Rui Zhang.
9196 Fixed a problem with Index Fields where the Index register was
9198 limited to a maximum of 32 bits. Now any size may be used.
9200 Fixed a couple memory leaks associated with "implicit return" objects
9202 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
9204 Example Code and Data Size: These are the sizes for the OS-independent
9205 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9206 debug version of the code includes the debug output trace mechanism and
9208 a much larger code and data size.
9211 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9212 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9214 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9215 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9217 ----------------------------------------
9218 14 November 2007. Summary of changes for version 20071114:
9220 1) ACPI CA Core Subsystem:
9222 Implemented event counters for each of the Fixed Events, the ACPI SCI
9223 (interrupt) itself, and control methods executed. Named
9224 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
9226 should be useful for debugging and statistics.
9228 Implemented a new external interface, AcpiGetStatistics, to retrieve the
9229 contents of the various event counters. Returns the current values for
9230 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
9231 AcpiMethodCount. The interface can be expanded in the future if new
9233 are added. Device drivers should use this interface rather than access
9237 Fixed a problem with the FromBCD and ToBCD operators. With some
9239 the ShortDivide function worked incorrectly, causing problems with the
9241 functions with large input values. A truncation from 64-bit to 32-bit
9242 inadvertently occurred. Internal BZ 435. Lin Ming
9244 Fixed a problem with Index references passed as method arguments.
9246 passed as arguments to control methods were dereferenced immediately
9248 control was passed to the called method). The references are now
9250 passed directly to the called method. BZ 5389. Lin Ming
9252 Fixed a problem with CopyObject used in conjunction with the Index
9254 The reference was incorrectly dereferenced before the copy. The reference
9256 now correctly copied. BZ 5391. Lin Ming
9258 Fixed a problem with Control Method references within Package objects.
9260 references are now correctly generated. This completes the package
9261 construction overhaul that began in version 20071019.
9263 Example Code and Data Size: These are the sizes for the OS-independent
9264 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9265 debug version of the code includes the debug output trace mechanism and
9267 a much larger code and data size.
9270 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9271 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9273 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9274 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9277 2) iASL Compiler/Disassembler and Tools:
9279 The AcpiExec utility now installs handlers for all of the predefined
9280 Operation Region types. New types supported are: PCI_Config, CMOS, and
9283 Fixed a problem with the 64-bit version of AcpiExec where the extended
9285 bit) address fields for the DSDT and FACS within the FADT were not being
9286 used, causing truncation of the upper 32-bits of these addresses. Lin
9290 ----------------------------------------
9291 19 October 2007. Summary of changes for version 20071019:
9293 1) ACPI CA Core Subsystem:
9295 Fixed a problem with the Alias operator when the target of the alias is a
9296 named ASL operator that opens a new scope -- Scope, Device,
9298 Processor, and ThermalZone. In these cases, any children of the original
9299 operator could not be accessed via the alias, potentially causing
9301 AE_NOT_FOUND exceptions. (BZ 9067)
9303 Fixed a problem with the Package operator where all named references were
9304 created as object references and left otherwise unresolved. According to
9306 ACPI specification, a Package can only contain Data Objects or references
9308 control methods. The implication is that named references to Data Objects
9309 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
9310 immediately upon package creation. This is the approach taken with this
9311 change. References to all other named objects (Methods, Devices, Scopes,
9312 etc.) are all now properly created as reference objects. (BZ 5328)
9314 Reverted a change to Notify handling that was introduced in version
9315 20070508. This version changed the Notify handling from asynchronous to
9316 fully synchronous (Device driver Notify handling with respect to the
9318 ASL operator). It was found that this change caused more problems than it
9319 solved and was removed by most users.
9321 Fixed a problem with the Increment and Decrement operators where the type
9323 the target object could be unexpectedly and incorrectly changed. (BZ 353)
9326 Fixed a problem with the Load and LoadTable operators where the table
9327 location within the namespace was ignored. Instead, the table was always
9328 loaded into the root or current scope. Lin Ming.
9330 Fixed a problem with the Load operator when loading a table from a buffer
9331 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
9333 Fixed a problem with the Debug object where a store of a DdbHandle
9335 object to the Debug object could cause a fault.
9337 Added a table checksum verification for the Load operator, in the case
9339 the load is from a buffer. (BZ 578).
9341 Implemented additional parameter validation for the LoadTable operator.
9343 length of the input strings SignatureString, OemIdString, and OemTableId
9345 now checked for maximum lengths. (BZ 582) Lin Ming.
9347 Example Code and Data Size: These are the sizes for the OS-independent
9348 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9349 debug version of the code includes the debug output trace mechanism and
9351 a much larger code and data size.
9354 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9355 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9357 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9358 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9361 2) iASL Compiler/Disassembler:
9363 Fixed a problem where if a single file was specified and the file did not
9364 exist, no error message was emitted. (Introduced with wildcard support in
9367 ----------------------------------------
9368 19 September 2007. Summary of changes for version 20070919:
9370 1) ACPI CA Core Subsystem:
9372 Designed and implemented new external interfaces to install and remove
9373 handlers for ACPI table-related events. Current events that are defined
9375 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
9376 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
9377 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
9379 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
9380 (acpi_serialized option on Linux) could cause some systems to hang during
9381 initialization. (Bob Moore) BZ 8171
9383 Fixed a problem where objects of certain types (Device, ThermalZone,
9384 Processor, PowerResource) can be not found if they are declared and
9385 referenced from within the same control method (Lin Ming) BZ 341
9387 Example Code and Data Size: These are the sizes for the OS-independent
9388 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9389 debug version of the code includes the debug output trace mechanism and
9391 a much larger code and data size.
9394 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9395 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9397 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9398 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9401 2) iASL Compiler/Disassembler:
9403 Implemented support to allow multiple files to be compiled/disassembled
9406 single invocation. This includes command line wildcard support for both
9408 Windows and Unix versions of the compiler. This feature simplifies the
9409 disassembly and compilation of multiple ACPI tables in a single
9412 ----------------------------------------
9413 08 May 2007. Summary of changes for version 20070508:
9415 1) ACPI CA Core Subsystem:
9417 Implemented a Microsoft compatibility design change for the handling of
9419 Notify AML operator. Previously, notify handlers were dispatched and
9420 executed completely asynchronously in a deferred thread. The new design
9421 still executes the notify handlers in a different thread, but the
9423 thread that executed the Notify() now waits at a synchronization point
9425 the notify handler to complete. Some machines depend on a synchronous
9427 operator in order to operate correctly.
9429 Implemented support to allow Package objects to be passed as method
9430 arguments to the external AcpiEvaluateObject interface. Previously, this
9431 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
9432 implemented since there were no reserved control methods that required it
9435 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
9437 contained invalid non-zero values in reserved fields could cause later
9438 failures because these fields have meaning in later revisions of the
9440 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
9442 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
9444 Fixed a problem where the Global Lock handle was not properly updated if
9446 thread that acquired the Global Lock via executing AML code then
9448 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
9452 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
9453 could be corrupted if the interrupt being removed was at the head of the
9454 list. Reported by Linn Crosetto.
9456 Example Code and Data Size: These are the sizes for the OS-independent
9457 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9458 debug version of the code includes the debug output trace mechanism and
9460 a much larger code and data size.
9463 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9464 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9466 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9467 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9469 ----------------------------------------
9470 20 March 2007. Summary of changes for version 20070320:
9472 1) ACPI CA Core Subsystem:
9474 Implemented a change to the order of interpretation and evaluation of AML
9475 operand objects within the AML interpreter. The interpreter now evaluates
9476 operands in the order that they appear in the AML stream (and the
9477 corresponding ASL code), instead of in the reverse order (after the
9479 operand list has been parsed). The previous behavior caused several
9481 incompatibilities with the Microsoft AML interpreter as well as being
9482 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
9484 Implemented a change to the ACPI Global Lock support. All interfaces to
9486 global lock now allow the same thread to acquire the lock multiple times.
9487 This affects the AcpiAcquireGlobalLock external interface to the global
9489 as well as the internal use of the global lock to support AML fields -- a
9490 control method that is holding the global lock can now simultaneously
9492 AML fields that require global lock protection. Previously, in both
9494 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
9496 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
9497 Controller. There is no change to the behavior of the AML Acquire
9499 as this can already be used to acquire a mutex multiple times by the same
9500 thread. BZ 8066. With assistance from Alexey Starikovskiy.
9502 Fixed a problem where invalid objects could be referenced in the AML
9503 Interpreter after error conditions. During operand evaluation, ensure
9505 the internal "Return Object" field is cleared on error and only valid
9506 pointers are stored there. Caused occasional access to deleted objects
9508 resulted in "large reference count" warning messages. Valery Podrezov.
9510 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
9512 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
9515 Fixed an internal problem with the handling of result objects on the
9516 interpreter result stack. BZ 7872. Valery Podrezov.
9518 Removed obsolete code that handled the case where AML_NAME_OP is the
9520 of a reference (Reference.Opcode). This code was no longer necessary. BZ
9521 7874. Valery Podrezov.
9523 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
9526 remnant from the previously discontinued 16-bit support.
9528 Example Code and Data Size: These are the sizes for the OS-independent
9529 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9530 debug version of the code includes the debug output trace mechanism and
9532 a much larger code and data size.
9535 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9536 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9538 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9539 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9541 ----------------------------------------
9542 26 January 2007. Summary of changes for version 20070126:
9544 1) ACPI CA Core Subsystem:
9546 Added the 2007 copyright to all module headers and signons. This affects
9547 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9550 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
9551 during a table load. A bad pointer was passed in the case where the DSDT
9553 overridden, causing a fault in this case.
9555 Example Code and Data Size: These are the sizes for the OS-independent
9556 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9557 debug version of the code includes the debug output trace mechanism and
9559 a much larger code and data size.
9562 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9563 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9565 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9566 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9568 ----------------------------------------
9569 15 December 2006. Summary of changes for version 20061215:
9571 1) ACPI CA Core Subsystem:
9573 Support for 16-bit ACPICA has been completely removed since it is no
9575 necessary and it clutters the code. All 16-bit macros, types, and
9576 conditional compiles have been removed, cleaning up and simplifying the
9578 across the entire subsystem. DOS support is no longer needed since the
9579 bootable Linux firmware kit is now available.
9581 The handler for the Global Lock is now removed during AcpiTerminate to
9582 enable a clean subsystem restart, via the implementation of the
9583 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
9586 Implemented enhancements to the multithreading support within the
9588 to enable improved multithreading debugging and evaluation of the
9592 Debugger: Enhanced the Statistics/Memory command to emit the total
9594 memory used during the execution, as well as the maximum memory consumed
9596 each of the various object types. (Valery Podrezov)
9598 Example Code and Data Size: These are the sizes for the OS-independent
9599 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9600 debug version of the code includes the debug output trace mechanism and
9602 a much larger code and data size.
9605 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
9606 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
9608 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9609 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9612 2) iASL Compiler/Disassembler and Tools:
9614 AcpiExec: Implemented a new option (-m) to display full memory use
9615 statistics upon subsystem/program termination. (Valery Podrezov)
9617 ----------------------------------------
9618 09 November 2006. Summary of changes for version 20061109:
9620 1) ACPI CA Core Subsystem:
9622 Optimized the Load ASL operator in the case where the source operand is
9624 operation region. Simply map the operation region memory, instead of
9625 performing a bytewise read. (Region must be of type SystemMemory, see
9628 Fixed the Load ASL operator for the case where the source operand is a
9629 region field. A buffer object is also allowed as the source operand. BZ
9632 Fixed a problem where the Load ASL operator allowed the source operand to
9634 an operation region of any type. It is now restricted to regions of type
9635 SystemMemory, as per the ACPI specification. BZ 481
9637 Additional cleanup and optimizations for the new Table Manager code.
9639 AcpiEnable will now fail if all of the required ACPI tables are not
9641 (FADT, FACS, DSDT). BZ 477
9643 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
9645 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
9646 manually optimized to be aligned and will not work if it is byte-packed.
9648 Example Code and Data Size: These are the sizes for the OS-independent
9649 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9650 debug version of the code includes the debug output trace mechanism and
9652 a much larger code and data size.
9655 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
9656 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
9658 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
9659 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
9662 2) iASL Compiler/Disassembler and Tools:
9664 Fixed a problem where the presence of the _OSI predefined control method
9665 within complex expressions could cause an internal compiler error.
9667 AcpiExec: Implemented full region support for multiple address spaces.
9668 SpaceId is now part of the REGION object. BZ 429
9670 ----------------------------------------
9671 11 October 2006. Summary of changes for version 20061011:
9673 1) ACPI CA Core Subsystem:
9675 Completed an AML interpreter performance enhancement for control method
9676 execution. Previously a 2-pass parse/execution, control methods are now
9677 completely parsed and executed in a single pass. This improves overall
9678 interpreter performance by ~25%, reduces code size, and reduces CPU stack
9679 use. (Valery Podrezov + interpreter changes in version 20051202 that
9680 eliminated namespace loading during the pass one parse.)
9682 Implemented _CID support for PCI Root Bridge detection. If the _HID does
9684 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
9686 obtained and also checked for an ID match.
9688 Implemented additional support for the PCI _ADR execution: upsearch until
9690 device scope is found before executing _ADR. This allows PCI_Config
9691 operation regions to be declared locally within control methods
9695 Fixed a problem with a possible race condition between threads executing
9696 AcpiWalkNamespace and the AML interpreter. This condition was removed by
9697 modifying AcpiWalkNamespace to (by default) ignore all temporary
9699 entries created during any concurrent control method execution. An
9700 additional namespace race condition is known to exist between
9701 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
9704 Restructured the AML ParseLoop function, breaking it into several
9705 subfunctions in order to reduce CPU stack use and improve
9709 AcpiGetHandle: Fix for parameter validation to detect invalid
9711 of prefix handle and pathname. BZ 478
9713 Example Code and Data Size: These are the sizes for the OS-independent
9714 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9715 debug version of the code includes the debug output trace mechanism and
9717 a much larger code and data size.
9720 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9721 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
9723 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
9724 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
9726 2) iASL Compiler/Disassembler and Tools:
9728 Ported the -g option (get local ACPI tables) to the new ACPICA Table
9730 to restore original behavior.
9732 ----------------------------------------
9733 27 September 2006. Summary of changes for version 20060927:
9735 1) ACPI CA Core Subsystem:
9737 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
9738 These functions now use a spinlock for mutual exclusion and the interrupt
9739 level indication flag is not needed.
9741 Fixed a problem with the Global Lock where the lock could appear to be
9742 obtained before it is actually obtained. The global lock semaphore was
9743 inadvertently created with one unit instead of zero units. (BZ 464)
9747 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
9749 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
9751 Example Code and Data Size: These are the sizes for the OS-independent
9752 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9753 debug version of the code includes the debug output trace mechanism and
9755 a much larger code and data size.
9758 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9759 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
9761 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9762 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
9765 2) iASL Compiler/Disassembler and Tools:
9767 Fixed a compilation problem with the pre-defined Resource Descriptor
9769 names where an "object does not exist" error could be incorrectly
9771 if the parent ResourceTemplate pathname places the template within a
9772 different namespace scope than the current scope. (BZ 7212)
9774 Fixed a problem where the compiler could hang after syntax errors
9776 in an ElseIf construct. (BZ 453)
9778 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
9779 operator. An incorrect output filename was produced when this parameter
9781 a null string (""). Now, the original input filename is used as the AML
9782 output filename, with an ".aml" extension.
9784 Implemented a generic batch command mode for the AcpiExec utility
9786 any AML debugger command) (Valery Podrezov).
9788 ----------------------------------------
9789 12 September 2006. Summary of changes for version 20060912:
9791 1) ACPI CA Core Subsystem:
9793 Enhanced the implementation of the "serialized mode" of the interpreter
9794 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
9795 specified, instead of creating a serialization semaphore per control
9797 the interpreter lock is simply no longer released before a blocking
9798 operation during control method execution. This effectively makes the AML
9799 Interpreter single-threaded. The overhead of a semaphore per-method is
9802 Fixed a regression where an error was no longer emitted if a control
9804 attempts to create 2 objects of the same name. This once again returns
9805 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
9807 will dynamically serialize the control method to possible prevent future
9810 Integrated a fix for a problem with PCI Express HID detection in the PCI
9811 Config Space setup procedure. (BZ 7145)
9813 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
9814 AcpiHwInitialize function - the FADT registers are now validated when the
9817 Added two new warnings during FADT verification - 1) if the FADT is
9819 than the largest known FADT version, and 2) if there is a mismatch
9822 32-bit block address and the 64-bit X counterpart (when both are non-
9825 Example Code and Data Size: These are the sizes for the OS-independent
9826 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9827 debug version of the code includes the debug output trace mechanism and
9829 a much larger code and data size.
9832 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
9833 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
9835 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9836 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
9839 2) iASL Compiler/Disassembler and Tools:
9841 Fixed a problem with the implementation of the Switch() operator where
9843 temporary variable was declared too close to the actual Switch, instead
9845 at method level. This could cause a problem if the Switch() operator is
9846 within a while loop, causing an error on the second iteration. (BZ 460)
9848 Disassembler - fix for error emitted for unknown type for target of scope
9849 operator. Now, ignore it and continue.
9851 Disassembly of an FADT now verifies the input FADT and reports any errors
9852 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
9854 Disassembly of raw data buffers with byte initialization data now
9856 each output line with the current buffer offset.
9858 Disassembly of ASF! table now includes all variable-length data fields at
9859 the end of some of the subtables.
9861 The disassembler now emits a comment if a buffer appears to be a
9862 ResourceTemplate, but cannot be disassembled as such because the EndTag
9864 not appear at the very end of the buffer.
9866 AcpiExec - Added the "-t" command line option to enable the serialized
9868 of the AML interpreter.
9870 ----------------------------------------
9871 31 August 2006. Summary of changes for version 20060831:
9873 1) ACPI CA Core Subsystem:
9875 Miscellaneous fixes for the Table Manager:
9876 - Correctly initialize internal common FADT for all 64-bit "X" fields
9877 - Fixed a couple table mapping issues during table load
9878 - Fixed a couple alignment issues for IA64
9879 - Initialize input array to zero in AcpiInitializeTables
9880 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
9883 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
9885 immediately disabled to prevent the waking GPE from firing again and to
9886 prevent other wake GPEs from interrupting the wake process.
9888 Added the AcpiGpeCount global that tracks the number of processed GPEs,
9890 be used for debugging systems with a large number of ACPI interrupts.
9892 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
9893 both the ACPICA headers and the disassembler.
9895 Example Code and Data Size: These are the sizes for the OS-independent
9896 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9897 debug version of the code includes the debug output trace mechanism and
9899 a much larger code and data size.
9902 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
9903 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
9905 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
9906 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
9909 2) iASL Compiler/Disassembler and Tools:
9911 Disassembler support for the DMAR ACPI table.
9913 ----------------------------------------
9914 23 August 2006. Summary of changes for version 20060823:
9916 1) ACPI CA Core Subsystem:
9918 The Table Manager component has been completely redesigned and
9919 reimplemented. The new design is much simpler, and reduces the overall
9921 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
9923 now possible to obtain the ACPI tables very early during kernel
9924 initialization, even before dynamic memory management is initialized.
9925 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
9927 Obsolete ACPICA interfaces:
9929 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
9932 - AcpiLoadTable: Not needed.
9933 - AcpiUnloadTable: Not needed.
9935 New ACPICA interfaces:
9937 - AcpiInitializeTables: Must be called before the table manager can be
9939 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
9940 allocated memory after it becomes available.
9941 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
9945 Other ACPICA changes:
9947 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
9949 AcpiOsUnmapMemory to free this mapping.
9950 - AcpiGetTable returns the actual mapped table. The mapping is managed
9951 internally and must not be deleted by the caller. Use of this interface
9952 causes no additional dynamic memory allocation.
9953 - AcpiFindRootPointer: Support for physical addressing has been
9955 it appeared to be unused.
9956 - The interface to AcpiOsMapMemory has changed to be consistent with the
9957 other allocation interfaces.
9958 - The interface to AcpiOsGetRootPointer has changed to eliminate
9961 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
9963 bit platforms. Was previously 64 bits on all platforms.
9964 - The interface to the ACPI Global Lock acquire/release macros have
9966 slightly since ACPICA no longer keeps a local copy of the FACS with a
9967 constructed pointer to the actual global lock.
9969 Porting to the new table manager:
9971 - AcpiInitializeTables: Must be called once, and can be called anytime
9972 during the OS initialization process. It allows the host to specify an
9974 of memory to be used to store the internal version of the RSDT/XSDT (root
9975 table). This allows the host to access ACPI tables before memory
9977 is initialized and running.
9978 - AcpiReallocateRootTable: Can be called after memory management is
9980 to copy the root table to a dynamically allocated array, freeing up the
9981 scratch memory specified in the call to AcpiInitializeTables.
9982 - AcpiSubsystemInitialize: This existing interface is independent of the
9983 Table Manager, and does not have to be called before the Table Manager
9985 be used, it only must be called before the rest of ACPICA can be used.
9986 - ACPI Tables: Some changes have been made to the names and structure of
9988 actbl.h and actbl1.h header files and may require changes to existing
9990 For example, bitfields have been completely removed because of their lack
9992 portability across C compilers.
9993 - Update interfaces to the Global Lock acquire/release macros if local
9994 versions are used. (see acwin.h)
9996 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
10000 Example Code and Data Size: These are the sizes for the OS-independent
10001 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10002 debug version of the code includes the debug output trace mechanism and
10004 a much larger code and data size.
10007 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10008 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10010 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10011 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10014 2) iASL Compiler/Disassembler and Tools:
10016 No changes for this release.
10018 ----------------------------------------
10019 21 July 2006. Summary of changes for version 20060721:
10021 1) ACPI CA Core Subsystem:
10023 The full source code for the ASL test suite used to validate the iASL
10024 compiler and the ACPICA core subsystem is being released with the ACPICA
10025 source for the first time. The source is contained in a separate package
10027 consists of over 1100 files that exercise all ASL/AML operators. The
10029 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
10033 Completed a new design and implementation for support of the ACPI Global
10034 Lock. On the OS side, the global lock is now treated as a standard AML
10035 mutex. Previously, multiple OS threads could "acquire" the global lock
10036 simultaneously. However, this could cause the BIOS to be starved out of
10038 lock - especially in cases such as the Embedded Controller driver where
10039 there is a tight coupling between the OS and the BIOS.
10041 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
10042 The Global Lock interrupt handler no longer queues the execution of a
10043 separate thread to signal the global lock semaphore. Instead, the
10045 is signaled directly from the interrupt handler.
10047 Implemented support within the AML interpreter for package objects that
10048 contain a larger AML length (package list length) than the package
10050 count. In this case, the length of the package is truncated to match the
10051 package element count. Some BIOS code apparently modifies the package
10053 on the fly, and this change supports this behavior. Provides
10055 with the MS AML interpreter. (With assistance from Fiodor Suietov)
10057 Implemented a temporary fix for the BankValue parameter of a Bank Field
10059 support all constant values, now including the Zero and One opcodes.
10060 Evaluation of this parameter must eventually be converted to a full
10062 evaluation. A not-implemented error is now returned (temporarily) for
10064 constant values for this parameter.
10066 Fixed problem reports (Fiodor Suietov) integrated:
10067 - Fix for premature object deletion after CopyObject on Operation Region
10071 Example Code and Data Size: These are the sizes for the OS-independent
10072 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10073 debug version of the code includes the debug output trace mechanism and
10075 a much larger code and data size.
10078 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
10079 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
10081 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10082 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10085 2) iASL Compiler/Disassembler and Tools:
10087 No changes for this release.
10089 ----------------------------------------
10090 07 July 2006. Summary of changes for version 20060707:
10092 1) ACPI CA Core Subsystem:
10094 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
10095 that do not allow the initialization of address pointers within packed
10096 structures - even though the hardware itself may support misaligned
10097 transfers. Some of the debug data structures are packed by default to
10100 Added an error message for the case where AcpiOsGetThreadId() returns
10102 A non-zero value is required by the core ACPICA code to ensure the proper
10103 operation of AML mutexes and recursive control methods.
10105 The DSDT is now the only ACPI table that determines whether the AML
10106 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
10108 the hooks for per-table 32/64 switching have been removed from the code.
10110 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
10112 Fixed a possible leak of an OwnerID in the error path of
10113 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
10114 deletion to a single place in AcpiTbUninstallTable to correct possible
10116 when using the AcpiTbDeleteTablesByType interface (with assistance from
10119 Fixed a problem with Serialized control methods where the semaphore
10120 associated with the method could be over-signaled after multiple method
10123 Fixed two issues with the locking of the internal namespace data
10125 Both the Unload() operator and AcpiUnloadTable interface now lock the
10126 namespace during the namespace deletion associated with the table unload
10127 (with assistance from Linn Crosetto.)
10129 Fixed problem reports (Valery Podrezov) integrated:
10130 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
10132 Fixed problem reports (Fiodor Suietov) integrated:
10133 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
10134 - On Address Space handler deletion, needless deactivation call (BZ 374)
10135 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
10137 - Possible memory leak, Notify sub-objects of Processor, Power,
10140 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
10141 - Minimum Length of RSDT should be validated (BZ 379)
10142 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
10144 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
10148 Example Code and Data Size: These are the sizes for the OS-independent
10149 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10150 debug version of the code includes the debug output trace mechanism and
10152 a much larger code and data size.
10155 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10156 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10158 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10159 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10162 2) iASL Compiler/Disassembler and Tools:
10164 Fixed problem reports:
10165 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
10168 ----------------------------------------
10169 23 June 2006. Summary of changes for version 20060623:
10171 1) ACPI CA Core Subsystem:
10173 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
10174 allows the type to be customized to the host OS for improved efficiency
10175 (since a spinlock is usually a very small object.)
10177 Implemented support for "ignored" bits in the ACPI registers. According
10179 the ACPI specification, these bits should be preserved when writing the
10180 registers via a read/modify/write cycle. There are 3 bits preserved in
10182 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
10184 Implemented the initial deployment of new OSL mutex interfaces. Since
10186 host operating systems have separate mutex and semaphore objects, this
10187 feature was requested. The base code now uses mutexes (and the new mutex
10188 interfaces) wherever a binary semaphore was used previously. However, for
10189 the current release, the mutex interfaces are defined as macros to map
10191 to the existing semaphore interfaces. Therefore, no OSL changes are
10193 at this time. (See acpiosxf.h)
10195 Fixed several problems with the support for the control method SyncLevel
10196 parameter. The SyncLevel now works according to the ACPI specification
10198 in concert with the Mutex SyncLevel parameter, since the current
10200 is a property of the executing thread. Mutual exclusion for control
10202 is now implemented with a mutex instead of a semaphore.
10204 Fixed three instances of the use of the C shift operator in the bitfield
10205 support code (exfldio.c) to avoid the use of a shift value larger than
10207 target data width. The behavior of C compilers is undefined in this case
10209 can cause unpredictable results, and therefore the case must be detected
10211 avoided. (Fiodor Suietov)
10213 Added an info message whenever an SSDT or OEM table is loaded dynamically
10214 via the Load() or LoadTable() ASL operators. This should improve
10216 capability since it will show exactly what tables have been loaded
10218 the tables present in the RSDT/XSDT.)
10220 Example Code and Data Size: These are the sizes for the OS-independent
10221 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10222 debug version of the code includes the debug output trace mechanism and
10224 a much larger code and data size.
10227 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10228 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10230 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10231 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10234 2) iASL Compiler/Disassembler and Tools:
10236 No changes for this release.
10238 ----------------------------------------
10239 08 June 2006. Summary of changes for version 20060608:
10241 1) ACPI CA Core Subsystem:
10243 Converted the locking mutex used for the ACPI hardware to a spinlock.
10245 change should eliminate all problems caused by attempting to acquire a
10246 semaphore at interrupt level, and it means that all ACPICA external
10247 interfaces that directly access the ACPI hardware can be safely called
10249 interrupt level. OSL code that implements the semaphore interfaces should
10251 able to eliminate any workarounds for being called at interrupt level.
10253 Fixed a regression introduced in 20060526 where the ACPI device
10254 initialization could be prematurely aborted with an AE_NOT_FOUND if a
10256 did not have an optional _INI method.
10258 Fixed an IndexField issue where a write to the Data Register should be
10259 limited in size to the AccessSize (width) of the IndexField itself. (BZ
10263 Fixed problem reports (Valery Podrezov) integrated:
10264 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
10266 Fixed problem reports (Fiodor Suietov) integrated:
10267 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
10269 Removed four global mutexes that were obsolete and were no longer being
10272 Example Code and Data Size: These are the sizes for the OS-independent
10273 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10274 debug version of the code includes the debug output trace mechanism and
10276 a much larger code and data size.
10279 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10280 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10282 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10283 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10286 2) iASL Compiler/Disassembler and Tools:
10288 Fixed a fault when using -g option (get tables from registry) on Windows
10291 Fixed problem reports integrated:
10292 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
10293 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
10295 - Global table revision override (-r) is ignored (BZ 413)
10297 ----------------------------------------
10298 26 May 2006. Summary of changes for version 20060526:
10300 1) ACPI CA Core Subsystem:
10302 Restructured, flattened, and simplified the internal interfaces for
10303 namespace object evaluation - resulting in smaller code, less CPU stack
10305 and fewer interfaces. (With assistance from Mikhail Kouzmich)
10307 Fixed a problem with the CopyObject operator where the first parameter
10309 not typed correctly for the parser, interpreter, compiler, and
10311 Caused various errors and unexpected behavior.
10313 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
10314 produced incorrect results with some C compilers. Since the behavior of C
10315 compilers when the shift value is larger than the datatype width is
10316 apparently not well defined, the interpreter now detects this condition
10318 simply returns zero as expected in all such cases. (BZ 395)
10320 Fixed problem reports (Valery Podrezov) integrated:
10321 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
10322 - Allow interpreter to handle nested method declarations (BZ 5361)
10324 Fixed problem reports (Fiodor Suietov) integrated:
10325 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
10327 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
10329 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
10330 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
10331 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
10332 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
10333 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
10334 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
10335 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
10337 - Status of the Global Initialization Handler call not used (BZ 366)
10338 - Incorrect object parameter to Global Initialization Handler (BZ 367)
10340 Example Code and Data Size: These are the sizes for the OS-independent
10341 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10342 debug version of the code includes the debug output trace mechanism and
10344 a much larger code and data size.
10347 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10348 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10350 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10351 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10354 2) iASL Compiler/Disassembler and Tools:
10356 Modified the parser to allow the names IO, DMA, and IRQ to be used as
10357 namespace identifiers with no collision with existing resource descriptor
10358 macro names. This provides compatibility with other ASL compilers and is
10359 most useful for disassembly/recompilation of existing tables without
10361 errors. (With assistance from Thomas Renninger)
10363 Disassembler: fixed an incorrect disassembly problem with the
10364 DataTableRegion and CopyObject operators. Fixed a possible fault during
10365 disassembly of some Alias operators.
10367 ----------------------------------------
10368 12 May 2006. Summary of changes for version 20060512:
10370 1) ACPI CA Core Subsystem:
10372 Replaced the AcpiOsQueueForExecution interface with a new interface named
10373 AcpiOsExecute. The major difference is that the new interface does not
10375 a Priority parameter, this appeared to be useless and has been replaced
10378 Type parameter. The Type tells the host what type of execution is being
10379 requested, such as global lock handler, notify handler, GPE handler, etc.
10380 This allows the host to queue and execute the request as appropriate for
10382 request type, possibly using different work queues and different
10384 for the various request types. This enables fixes for multithreading
10385 deadlock problems such as BZ #5534, and will require changes to all
10387 OS interface layers. (Alexey Starikovskiy and Bob Moore)
10389 Fixed a possible memory leak associated with the support for the so-
10391 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
10394 Fixed a problem with the Load() operator where a table load from an
10395 operation region could overwrite an internal table buffer by up to 7
10397 and cause alignment faults on IPF systems. (With assistance from Luming
10400 Example Code and Data Size: These are the sizes for the OS-independent
10401 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10402 debug version of the code includes the debug output trace mechanism and
10404 a much larger code and data size.
10407 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10408 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10410 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10411 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10415 2) iASL Compiler/Disassembler and Tools:
10417 Disassembler: Implemented support to cross reference the internal
10419 and automatically generate ASL External() statements for symbols not
10421 within the current table being disassembled. This will simplify the
10422 disassembly and recompilation of interdependent tables such as SSDTs
10424 these statements will no longer have to be added manually.
10426 Disassembler: Implemented experimental support to automatically detect
10427 invocations of external control methods and generate appropriate
10429 statements. This is problematic because the AML cannot be correctly
10431 until the number of arguments for each control method is known.
10433 standalone method invocations and invocations as the source operand of a
10434 Store() statement are supported.
10436 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
10437 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
10438 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
10439 more readable and likely closer to the original ASL source.
10441 ----------------------------------------
10442 21 April 2006. Summary of changes for version 20060421:
10444 1) ACPI CA Core Subsystem:
10446 Removed a device initialization optimization introduced in 20051216 where
10447 the _STA method was not run unless an _INI was also present for the same
10448 device. This optimization could cause problems because it could allow
10450 methods to be run within a not-present device subtree. (If a not-present
10451 device had no _INI, _STA would not be run, the not-present status would
10453 be discovered, and the children of the device would be incorrectly
10456 Implemented a new _STA optimization where namespace subtrees that do not
10457 contain _INI are identified and ignored during device initialization.
10458 Selectively running _STA can significantly improve boot time on large
10459 machines (with assistance from Len Brown.)
10461 Implemented support for the device initialization case where the returned
10462 _STA flags indicate a device not-present but functioning. In this case,
10464 is not run, but the device children are examined for presence, as per the
10465 ACPI specification.
10467 Implemented an additional change to the IndexField support in order to
10468 conform to MS behavior. The value written to the Index Register is not
10469 simply a byte offset, it is a byte offset in units of the access width of
10470 the parent Index Field. (Fiodor Suietov)
10472 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
10473 interface is called during the creation of all AML operation regions, and
10474 allows the host OS to exert control over what addresses it will allow the
10475 AML code to access. Operation Regions whose addresses are disallowed will
10476 cause a runtime exception when they are actually accessed (will not
10478 or abort table loading.) See oswinxf or osunixxf for an example
10481 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
10482 interface allows the host OS to match the various "optional"
10483 interface/behavior strings for the _OSI predefined control method as
10484 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
10485 for an example implementation.
10487 Restructured and corrected various problems in the exception handling
10489 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
10490 (with assistance from Takayoshi Kochi.)
10492 Modified the Linux source converter to ignore quoted string literals
10494 converting identifiers from mixed to lower case. This will correct
10496 with the disassembler and other areas where such strings must not be
10499 The ACPI_FUNCTION_* macros no longer require quotes around the function
10500 name. This allows the Linux source converter to convert the names, now
10502 the converter ignores quoted strings.
10504 Example Code and Data Size: These are the sizes for the OS-independent
10505 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10506 debug version of the code includes the debug output trace mechanism and
10508 a much larger code and data size.
10512 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10513 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10515 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10516 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10519 2) iASL Compiler/Disassembler and Tools:
10521 Implemented 3 new warnings for iASL, and implemented multiple warning
10525 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
10527 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
10528 check for the possible timeout, a warning is issued.
10530 2) Useless operators: If an ASL operator does not specify an optional
10532 operand and it also does not use the function return value from the
10533 operator, a warning is issued since the operator effectively does
10536 3) Unreferenced objects: If a namespace object is created, but never
10537 referenced, a warning is issued. This is a warning level 2 since there
10539 cases where this is ok, such as when a secondary table is loaded that
10541 the unreferenced objects. Even so, care is taken to only flag objects
10543 don't look like they will ever be used. For example, the reserved methods
10544 (starting with an underscore) are usually not referenced because it is
10545 expected that the OS will invoke them.
10547 ----------------------------------------
10548 31 March 2006. Summary of changes for version 20060331:
10550 1) ACPI CA Core Subsystem:
10552 Implemented header file support for the following additional ACPI tables:
10553 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
10555 all current and known ACPI tables are now defined in the ACPICA headers
10557 are available for use by device drivers and other software.
10559 Implemented support to allow tables that contain ACPI names with invalid
10560 characters to be loaded. Previously, this would cause the table load to
10561 fail, but since there are several known cases of such tables on existing
10562 machines, this change was made to enable ACPI support for them. Also,
10564 matches the behavior of the Microsoft ACPI implementation.
10566 Fixed a couple regressions introduced during the memory optimization in
10568 20060317 release. The namespace node definition required additional
10569 reorganization and an internal datatype that had been changed to 8-bit
10571 restored to 32-bit. (Valery Podrezov)
10573 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
10574 could be passed through to AcpiOsReleaseObject which is unexpected. Such
10575 null pointers are now trapped and ignored, matching the behavior of the
10576 previous implementation before the deployment of AcpiOsReleaseObject.
10577 (Valery Podrezov, Fiodor Suietov)
10579 Fixed a memory mapping leak during the deletion of a SystemMemory
10581 region where a cached memory mapping was not deleted. This became a
10582 noticeable problem for operation regions that are defined within
10584 used control methods. (Dana Meyers)
10586 Reorganized the ACPI table header files into two main files: one for the
10587 ACPI tables consumed by the ACPICA core, and another for the
10589 ACPI tables that are consumed by the drivers and other software. The
10591 FADT definitions were merged into one common section and three different
10592 tables (ACPI 1.0, 1.0+, and 2.0)
10594 Example Code and Data Size: These are the sizes for the OS-independent
10595 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10596 debug version of the code includes the debug output trace mechanism and
10598 a much larger code and data size.
10601 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
10602 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
10604 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10605 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10608 2) iASL Compiler/Disassembler and Tools:
10610 Disassembler: Implemented support to decode and format all non-AML ACPI
10611 tables (tables other than DSDTs and SSDTs.) This includes the new tables
10612 added to the ACPICA headers, therefore all current and known ACPI tables
10616 Disassembler: The change to allow ACPI names with invalid characters also
10617 enables the disassembly of such tables. Invalid characters within names
10619 changed to '*' to make the name printable; the iASL compiler will still
10620 generate an error for such names, however, since this is an invalid ACPI
10623 Implemented an option for AcpiXtract (-a) to extract all tables found in
10625 input file. The default invocation extracts only the DSDTs and SSDTs.
10627 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
10628 makefile for the AcpiXtract utility.
10630 ----------------------------------------
10631 17 March 2006. Summary of changes for version 20060317:
10633 1) ACPI CA Core Subsystem:
10635 Implemented the use of a cache object for all internal namespace nodes.
10636 Since there are about 1000 static nodes in a typical system, this will
10637 decrease memory use for cache implementations that minimize per-
10639 overhead (such as a slab allocator.)
10641 Removed the reference count mechanism for internal namespace nodes, since
10643 was deemed unnecessary. This reduces the size of each namespace node by
10644 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
10646 and 32 bytes for the 64-bit case.
10648 Optimized several internal data structures to reduce object size on 64-
10650 platforms by packing data within the 64-bit alignment. This includes the
10651 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
10652 instances corresponding to the namespace objects.
10654 Added two new strings for the predefined _OSI method: "Windows 2001.1
10656 and "Windows 2006".
10658 Split the allocation tracking mechanism out to a separate file, from
10659 utalloc.c to uttrack.c. This mechanism appears to be only useful for
10660 application-level code. Kernels may wish to not include uttrack.c in
10663 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
10665 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
10668 Code and Data Size: These are the sizes for the acpica.lib produced by
10670 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10672 driver or OSPM code. The debug version of the code includes the debug
10674 trace mechanism and has a much larger code and data size. Note that these
10675 values will vary depending on the efficiency of the compiler and the
10676 compiler options used during generation.
10679 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10680 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
10682 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
10683 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
10686 2) iASL Compiler/Disassembler and Tools:
10688 Implemented an ANSI C version of the acpixtract utility. This version
10690 automatically extract the DSDT and all SSDTs from the input acpidump text
10691 file and dump the binary output to separate files. It can also display a
10692 summary of the input file including the headers for each table found and
10693 will extract any single ACPI table, with any signature. (See
10694 source/tools/acpixtract)
10696 ----------------------------------------
10697 10 March 2006. Summary of changes for version 20060310:
10699 1) ACPI CA Core Subsystem:
10701 Tagged all external interfaces to the subsystem with the new
10702 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
10704 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
10705 macro. The default definition is NULL.
10707 Added the ACPI_THREAD_ID type for the return value from
10709 This allows the host to define this as necessary to simplify kernel
10710 integration. The default definition is ACPI_NATIVE_UINT.
10712 Fixed two interpreter problems related to error processing, the deletion
10714 objects, and placing invalid pointers onto the internal operator result
10715 stack. BZ 6028, 6151 (Valery Podrezov)
10717 Increased the reference count threshold where a warning is emitted for
10719 reference counts in order to eliminate unnecessary warnings on systems
10721 large namespaces (especially 64-bit.) Increased the value from 0x400 to
10724 Due to universal disagreement as to the meaning of the 'c' in the
10726 function, the ACPI_MEM_CALLOCATE macro has been renamed to
10727 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
10728 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
10731 Code and Data Size: These are the sizes for the acpica.lib produced by
10733 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10735 driver or OSPM code. The debug version of the code includes the debug
10737 trace mechanism and has a much larger code and data size. Note that these
10738 values will vary depending on the efficiency of the compiler and the
10739 compiler options used during generation.
10742 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
10743 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
10745 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10746 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
10749 2) iASL Compiler/Disassembler:
10751 Disassembler: implemented support for symbolic resource descriptor
10752 references. If a CreateXxxxField operator references a fixed offset
10755 resource descriptor, a name is assigned to the descriptor and the offset
10757 translated to the appropriate resource tag and pathname. The addition of
10758 this support brings the disassembled code very close to the original ASL
10759 source code and helps eliminate run-time errors when the disassembled
10761 is modified (and recompiled) in such a way as to invalidate the original
10764 Implemented support for a Descriptor Name as the last parameter to the
10766 Register() macro. This parameter was inadvertently left out of the ACPI
10767 specification, and will be added for ACPI 3.0b.
10769 Fixed a problem where the use of the "_OSI" string (versus the full path
10770 "\_OSI") caused an internal compiler error. ("No back ptr to op")
10772 Fixed a problem with the error message that occurs when an invalid string
10774 used for a _HID object (such as one with an embedded asterisk:
10776 The correct message is now displayed.
10778 ----------------------------------------
10779 17 February 2006. Summary of changes for version 20060217:
10781 1) ACPI CA Core Subsystem:
10783 Implemented a change to the IndexField support to match the behavior of
10785 Microsoft AML interpreter. The value written to the Index register is now
10787 byte offset, no longer an index based upon the width of the Data
10789 This should fix IndexField problems seen on some machines where the Data
10790 register is not exactly one byte wide. The ACPI specification will be
10791 clarified on this point.
10793 Fixed a problem where several resource descriptor types could overrun the
10794 internal descriptor buffer due to size miscalculation: VendorShort,
10795 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
10796 affect all platforms.
10798 Fixed a problem where individual resource descriptors were misaligned
10800 the internal buffer, causing alignment faults on IA64 platforms.
10802 Code and Data Size: These are the sizes for the acpica.lib produced by
10804 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10806 driver or OSPM code. The debug version of the code includes the debug
10808 trace mechanism and has a much larger code and data size. Note that these
10809 values will vary depending on the efficiency of the compiler and the
10810 compiler options used during generation.
10813 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10814 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
10816 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
10817 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
10820 2) iASL Compiler/Disassembler:
10822 Implemented support for new reserved names: _WDG and _WED are Microsoft
10823 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
10824 defined method (Throttling Depth Limit.)
10826 Fixed a problem where a zero-length VendorShort or VendorLong resource
10827 descriptor was incorrectly emitted as a descriptor of length one.
10829 ----------------------------------------
10830 10 February 2006. Summary of changes for version 20060210:
10832 1) ACPI CA Core Subsystem:
10834 Removed a couple of extraneous ACPI_ERROR messages that appeared during
10835 normal execution. These became apparent after the conversion from
10838 Fixed a problem where the CreateField operator could hang if the BitIndex
10840 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
10842 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
10843 failed with an exception. This also fixes a couple of related RefOf and
10844 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
10846 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
10848 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
10852 Implemented a memory cleanup at the end of the execution of each
10854 of an AML While() loop, preventing the accumulation of outstanding
10856 (Valery Podrezov, BZ 5427)
10858 Eliminated a chunk of duplicate code in the object resolution code.
10862 Fixed several warnings during the 64-bit code generation.
10864 The AcpiSrc source code conversion tool now inserts one line of
10866 after an if() statement that is followed immediately by a comment,
10868 readability of the Linux code.
10870 Code and Data Size: The current and previous library sizes for the core
10871 subsystem are shown below. These are the code and data sizes for the
10872 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10874 values do not include any ACPI driver or OSPM code. The debug version of
10876 code includes the debug output trace mechanism and has a much larger code
10877 and data size. Note that these values will vary depending on the
10879 of the compiler and the compiler options used during generation.
10882 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
10883 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
10885 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10886 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
10889 2) iASL Compiler/Disassembler:
10891 Fixed a problem with the disassembly of a BankField operator with a
10893 expression for the BankValue parameter.
10895 ----------------------------------------
10896 27 January 2006. Summary of changes for version 20060127:
10898 1) ACPI CA Core Subsystem:
10900 Implemented support in the Resource Manager to allow unresolved
10902 references within resource package objects for the _PRT method. This
10904 is in addition to the previously implemented unresolved reference support
10905 within the AML parser. If the interpreter slack mode is enabled, these
10906 unresolved references will be passed through to the caller as a NULL
10910 Implemented and deployed new macros and functions for error and warning
10911 messages across the subsystem. These macros are simpler and generate less
10912 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
10913 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
10914 macros remain defined to allow ACPI drivers time to migrate to the new
10917 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
10919 Acquire/Release Lock OSL interfaces.
10921 Fixed a problem where Alias ASL operators are sometimes not correctly
10922 resolved, in both the interpreter and the iASL compiler.
10924 Fixed several problems with the implementation of the
10925 ConcatenateResTemplate
10926 ASL operator. As per the ACPI specification, zero length buffers are now
10927 treated as a single EndTag. One-length buffers always cause a fatal
10928 exception. Non-zero length buffers that do not end with a full 2-byte
10930 cause a fatal exception.
10932 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
10933 interface. (With assistance from Thomas Renninger)
10935 Code and Data Size: The current and previous library sizes for the core
10936 subsystem are shown below. These are the code and data sizes for the
10937 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10939 values do not include any ACPI driver or OSPM code. The debug version of
10941 code includes the debug output trace mechanism and has a much larger code
10942 and data size. Note that these values will vary depending on the
10944 of the compiler and the compiler options used during generation.
10947 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
10948 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
10950 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
10951 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
10954 2) iASL Compiler/Disassembler:
10956 Fixed an internal error that was generated for any forward references to
10960 ----------------------------------------
10961 13 January 2006. Summary of changes for version 20060113:
10963 1) ACPI CA Core Subsystem:
10965 Added 2006 copyright to all module headers and signons. This affects
10966 virtually every file in the ACPICA core subsystem, iASL compiler, and the
10969 Enhanced the ACPICA error reporting in order to simplify user migration
10971 the non-debug version of ACPICA. Replaced all instances of the
10972 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
10974 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
10975 respectively. This preserves all error and warning messages in the non-
10977 version of the ACPICA code (this has been referred to as the "debug lite"
10978 option.) Over 200 cases were converted to create a total of over 380
10979 error/warning messages across the ACPICA code. This increases the code
10981 data size of the default non-debug version of the code somewhat (about
10983 but all error/warning reporting may be disabled if desired (and code
10984 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
10985 configuration option. The size of the debug version of ACPICA remains
10989 Fixed a memory leak within the AML Debugger "Set" command. One object was
10990 not properly deleted for every successful invocation of the command.
10992 Code and Data Size: The current and previous library sizes for the core
10993 subsystem are shown below. These are the code and data sizes for the
10994 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10996 values do not include any ACPI driver or OSPM code. The debug version of
10998 code includes the debug output trace mechanism and has a much larger code
10999 and data size. Note that these values will vary depending on the
11001 of the compiler and the compiler options used during generation.
11004 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11005 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11007 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11008 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11011 2) iASL Compiler/Disassembler:
11013 The compiler now officially supports the ACPI 3.0a specification that was
11014 released on December 30, 2005. (Specification is available at
11017 ----------------------------------------
11018 16 December 2005. Summary of changes for version 20051216:
11020 1) ACPI CA Core Subsystem:
11022 Implemented optional support to allow unresolved names within ASL Package
11023 objects. A null object is inserted in the package when a named reference
11024 cannot be located in the current namespace. Enabled via the interpreter
11025 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
11027 that contain such code.
11029 Implemented an optimization to the initialization sequence that can
11031 boot time. During ACPI device initialization, the _STA method is now run
11033 and only if the _INI method exists. The _STA method is used to determine
11035 the device is present; An _INI can only be run if _STA returns present,
11037 it is a waste of time to run the _STA method if the _INI does not exist.
11038 (Prototype and assistance from Dong Wei)
11040 Implemented use of the C99 uintptr_t for the pointer casting macros if it
11042 available in the current compiler. Otherwise, the default (void *) cast
11046 Fixed some possible memory leaks found within the execution path of the
11047 Break, Continue, If, and CreateField operators. (Valery Podrezov)
11049 Fixed a problem introduced in the 20051202 release where an exception is
11050 generated during method execution if a control method attempts to declare
11053 Moved resource descriptor string constants that are used by both the AML
11054 disassembler and AML debugger to the common utilities directory so that
11055 these components are independent.
11057 Implemented support in the AcpiExec utility (-e switch) to globally
11059 exceptions during control method execution (method is not aborted.)
11061 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
11064 Code and Data Size: The current and previous library sizes for the core
11065 subsystem are shown below. These are the code and data sizes for the
11066 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11068 values do not include any ACPI driver or OSPM code. The debug version of
11070 code includes the debug output trace mechanism and has a much larger code
11071 and data size. Note that these values will vary depending on the
11073 of the compiler and the compiler options used during generation.
11076 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11077 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11079 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11080 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11083 2) iASL Compiler/Disassembler:
11085 Fixed a problem where a CPU stack overflow fault could occur if a
11087 method call was made from within a Return statement.
11089 ----------------------------------------
11090 02 December 2005. Summary of changes for version 20051202:
11092 1) ACPI CA Core Subsystem:
11094 Modified the parsing of control methods to no longer create namespace
11095 objects during the first pass of the parse. Objects are now created only
11096 during the execute phase, at the moment the namespace creation operator
11098 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
11100 should eliminate ALREADY_EXISTS exceptions seen on some machines where
11101 reentrant control methods are protected by an AML mutex. The mutex will
11103 correctly block multiple threads from attempting to create the same
11107 Increased the number of available Owner Ids for namespace object tracking
11108 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
11110 some machines with a large number of ACPI tables (either static or
11113 Fixed a problem with the AcpiExec utility where a fault could occur when
11115 -b switch (batch mode) is used.
11117 Enhanced the namespace dump routine to output the owner ID for each
11120 Code and Data Size: The current and previous library sizes for the core
11121 subsystem are shown below. These are the code and data sizes for the
11122 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11124 values do not include any ACPI driver or OSPM code. The debug version of
11126 code includes the debug output trace mechanism and has a much larger code
11127 and data size. Note that these values will vary depending on the
11129 of the compiler and the compiler options used during generation.
11132 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11133 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11135 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11136 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11139 2) iASL Compiler/Disassembler:
11141 Fixed a parse error during compilation of certain Switch/Case constructs.
11143 simplify the parse, the grammar now allows for multiple Default
11145 and this error is now detected and flagged during the analysis phase.
11147 Disassembler: The disassembly now includes the contents of the original
11148 table header within a comment at the start of the file. This includes the
11149 name and version of the original ASL compiler.
11151 ----------------------------------------
11152 17 November 2005. Summary of changes for version 20051117:
11154 1) ACPI CA Core Subsystem:
11156 Fixed a problem in the AML parser where the method thread count could be
11157 decremented below zero if any errors occurred during the method parse
11159 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
11161 This also fixed a related regression with the mechanism that detects and
11162 corrects methods that cannot properly handle reentrancy (related to the
11163 deployment of the new OwnerId mechanism.)
11165 Eliminated the pre-parsing of control methods (to detect errors) during
11166 table load. Related to the problem above, this was causing unwind issues
11168 any errors occurred during the parse, and it seemed to be overkill. A
11170 load should not be aborted if there are problems with any single control
11171 method, thus rendering this feature rather pointless.
11173 Fixed a problem with the new table-driven resource manager where an
11175 buffer overflow could occur for small resource templates.
11177 Implemented a new external interface, AcpiGetVendorResource. This
11179 will find and return a vendor-defined resource descriptor within a _CRS
11181 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
11184 Removed the length limit (200) on string objects as per the upcoming ACPI
11185 3.0A specification. This affects the following areas of the interpreter:
11187 any implicit conversion of a Buffer to a String, 2) a String object
11189 of the ASL Concatentate operator, 3) the String object result of the ASL
11192 Fixed a problem in the Windows OS interface layer (OSL) where a
11194 on a semaphore object would incorrectly timeout. This allows the
11195 multithreading features of the AcpiExec utility to work properly under
11198 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
11199 the recently added file named "utresrc.c".
11201 Code and Data Size: The current and previous library sizes for the core
11202 subsystem are shown below. These are the code and data sizes for the
11203 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11205 values do not include any ACPI driver or OSPM code. The debug version of
11207 code includes the debug output trace mechanism and has a much larger code
11208 and data size. Note that these values will vary depending on the
11210 of the compiler and the compiler options used during generation.
11213 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11214 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11216 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11217 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11220 2) iASL Compiler/Disassembler:
11222 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
11223 specification. For the iASL compiler, this means that string literals
11225 the source ASL can be of any length.
11227 Enhanced the listing output to dump the AML code for resource descriptors
11228 immediately after the ASL code for each descriptor, instead of in a block
11230 the end of the entire resource template.
11232 Enhanced the compiler debug output to dump the entire original parse tree
11233 constructed during the parse phase, before any transforms are applied to
11235 tree. The transformed tree is dumped also.
11237 ----------------------------------------
11238 02 November 2005. Summary of changes for version 20051102:
11240 1) ACPI CA Core Subsystem:
11242 Modified the subsystem initialization sequence to improve GPE support.
11244 GPE initialization has been split into two parts in order to defer
11246 of the _PRW methods (Power Resources for Wake) until after the hardware
11248 fully initialized and the SCI handler is installed. This allows the _PRW
11249 methods to access fields protected by the Global Lock. This will fix
11251 where a NO_GLOBAL_LOCK exception has been seen during initialization.
11253 Converted the ACPI internal object disassemble and display code within
11255 AML debugger to fully table-driven operation, reducing code size and
11256 increasing maintainability.
11258 Fixed a regression with the ConcatenateResTemplate() ASL operator
11260 in the 20051021 release.
11262 Implemented support for "local" internal ACPI object types within the
11263 debugger "Object" command and the AcpiWalkNamespace external interfaces.
11264 These local types include RegionFields, BankFields, IndexFields, Alias,
11268 Moved common AML resource handling code into a new file, "utresrc.c".
11270 code is shared by both the Resource Manager and the AML Debugger.
11272 Code and Data Size: The current and previous library sizes for the core
11273 subsystem are shown below. These are the code and data sizes for the
11274 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11276 values do not include any ACPI driver or OSPM code. The debug version of
11278 code includes the debug output trace mechanism and has a much larger code
11279 and data size. Note that these values will vary depending on the
11281 of the compiler and the compiler options used during generation.
11284 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11285 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11287 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11288 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11291 2) iASL Compiler/Disassembler:
11293 Fixed a problem with very large initializer lists (more than 4000
11295 for both Buffer and Package objects where the parse stack could overflow.
11297 Enhanced the pre-compile source code scan for non-ASCII characters to
11299 characters within comment fields. The scan is now always performed and is
11301 longer optional, detecting invalid characters within a source file
11302 immediately rather than during the parse phase or later.
11304 Enhanced the ASL grammar definition to force early reductions on all
11306 style grammar elements so that the overall parse stack usage is greatly
11307 reduced. This should improve performance and reduce the possibility of
11311 Eliminated all reduce/reduce conflicts in the iASL parser generation.
11313 with the addition of a %expected statement, the compiler generates from
11314 source with no warnings.
11316 Fixed a possible segment fault in the disassembler if the input filename
11317 does not contain a "dot" extension (Thomas Renninger).
11319 ----------------------------------------
11320 21 October 2005. Summary of changes for version 20051021:
11322 1) ACPI CA Core Subsystem:
11324 Implemented support for the EM64T and other x86-64 processors. This
11325 essentially entails recognizing that these processors support non-aligned
11326 memory transfers. Previously, all 64-bit processors were assumed to lack
11327 hardware support for non-aligned transfers.
11329 Completed conversion of the Resource Manager to nearly full table-driven
11330 operation. Specifically, the resource conversion code (convert AML to
11331 internal format and the reverse) and the debug code to dump internal
11332 resource descriptors are fully table-driven, reducing code and data size
11334 improving maintainability.
11336 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
11338 on 64-bit processors instead of a fixed 32-bit word. (With assistance
11340 Alexey Starikovskiy)
11342 Implemented support within the resource conversion code for the Type-
11343 Specific byte within the various ACPI 3.0 *WordSpace macros.
11345 Fixed some issues within the resource conversion code for the type-
11347 flags for both Memory and I/O address resource descriptors. For Memory,
11348 implemented support for the MTP and TTP flags. For I/O, split the TRS and
11349 TTP flags into two separate fields.
11351 Code and Data Size: The current and previous library sizes for the core
11352 subsystem are shown below. These are the code and data sizes for the
11353 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11355 values do not include any ACPI driver or OSPM code. The debug version of
11357 code includes the debug output trace mechanism and has a much larger code
11358 and data size. Note that these values will vary depending on the
11360 of the compiler and the compiler options used during generation.
11363 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11364 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11366 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11367 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11371 2) iASL Compiler/Disassembler:
11373 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
11375 corresponding ResourceSource string was not also present in a resource
11376 descriptor declaration. This restriction caused problems with existing
11377 AML/ASL code that includes the Index byte without the string. When such
11379 was disassembled, it could not be compiled without modification. Further,
11380 the modified code created a resource template with a different size than
11382 original, breaking code that used fixed offsets into the resource
11386 Removed a recent feature of the disassembler to ignore a lone
11388 byte. This byte is now emitted if present so that the exact AML can be
11389 reproduced when the disassembled code is recompiled.
11391 Improved comments and text alignment for the resource descriptor code
11392 emitted by the disassembler.
11394 Implemented disassembler support for the ACPI 3.0 AccessSize field within
11396 Register() resource descriptor.
11398 ----------------------------------------
11399 30 September 2005. Summary of changes for version 20050930:
11401 1) ACPI CA Core Subsystem:
11403 Completed a major overhaul of the Resource Manager code - specifically,
11404 optimizations in the area of the AML/internal resource conversion code.
11406 code has been optimized to simplify and eliminate duplicated code, CPU
11408 use has been decreased by optimizing function parameters and local
11409 variables, and naming conventions across the manager have been
11411 for clarity and ease of maintenance (this includes function, parameter,
11412 variable, and struct/typedef names.) The update may force changes in some
11413 driver code, depending on how resources are handled by the host OS.
11415 All Resource Manager dispatch and information tables have been moved to a
11416 single location for clarity and ease of maintenance. One new file was
11417 created, named "rsinfo.c".
11419 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
11420 guarantee that the argument is not evaluated twice, making them less
11422 to macro side-effects. However, since there exists the possibility of
11423 additional stack use if a particular compiler cannot optimize them (such
11425 in the debug generation case), the original macros are optionally
11427 Note that some invocations of the return_VALUE macro may now cause size
11428 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
11430 eliminate these. (From Randy Dunlap)
11432 Implemented a new mechanism to enable debug tracing for individual
11434 methods. A new external interface, AcpiDebugTrace, is provided to enable
11435 this mechanism. The intent is to allow the host OS to easily enable and
11436 disable tracing for problematic control methods. This interface can be
11437 easily exposed to a user or debugger interface if desired. See the file
11438 psxface.c for details.
11440 AcpiUtCallocate will now return a valid pointer if a length of zero is
11441 specified - a length of one is used and a warning is issued. This matches
11442 the behavior of AcpiUtAllocate.
11444 Code and Data Size: The current and previous library sizes for the core
11445 subsystem are shown below. These are the code and data sizes for the
11446 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11448 values do not include any ACPI driver or OSPM code. The debug version of
11450 code includes the debug output trace mechanism and has a much larger code
11451 and data size. Note that these values will vary depending on the
11453 of the compiler and the compiler options used during generation.
11456 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11457 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11459 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11460 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11463 2) iASL Compiler/Disassembler:
11465 A remark is issued if the effective compile-time length of a package or
11466 buffer is zero. Previously, this was a warning.
11468 ----------------------------------------
11469 16 September 2005. Summary of changes for version 20050916:
11471 1) ACPI CA Core Subsystem:
11473 Fixed a problem within the Resource Manager where support for the Generic
11474 Register descriptor was not fully implemented. This descriptor is now
11476 recognized, parsed, disassembled, and displayed.
11478 Completely restructured the Resource Manager code to utilize table-driven
11479 dispatch and lookup, eliminating many of the large switch() statements.
11481 reduces overall subsystem code size and code complexity. Affects the
11482 resource parsing and construction, disassembly, and debug dump output.
11484 Cleaned up and restructured the debug dump output for all resource
11485 descriptors. Improved readability of the output and reduced code size.
11487 Fixed a problem where changes to internal data structures caused the
11488 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
11490 Code and Data Size: The current and previous library sizes for the core
11491 subsystem are shown below. These are the code and data sizes for the
11492 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11494 values do not include any ACPI driver or OSPM code. The debug version of
11496 code includes the debug output trace mechanism and has a much larger code
11497 and data size. Note that these values will vary depending on the
11499 of the compiler and the compiler options used during generation.
11502 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11503 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11505 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11506 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11509 2) iASL Compiler/Disassembler:
11511 Updated the disassembler to automatically insert an EndDependentFn()
11513 into the ASL stream if this macro is missing in the original AML code,
11514 simplifying compilation of the resulting ASL module.
11516 Fixed a problem in the disassembler where a disassembled ResourceSource
11517 string (within a large resource descriptor) was not surrounded by quotes
11519 not followed by a comma, causing errors when the resulting ASL module was
11520 compiled. Also, escape sequences within a ResourceSource string are now
11521 handled correctly (especially "\\")
11523 ----------------------------------------
11524 02 September 2005. Summary of changes for version 20050902:
11526 1) ACPI CA Core Subsystem:
11528 Fixed a problem with the internal Owner ID allocation and deallocation
11529 mechanisms for control method execution and recursive method invocation.
11530 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
11531 messages seen on some systems. Recursive method invocation depth is
11532 currently limited to 255. (Alexey Starikovskiy)
11534 Completely eliminated all vestiges of support for the "module-level
11535 executable code" until this support is fully implemented and debugged.
11537 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
11538 some systems that invoke this support.
11540 Fixed a problem within the resource manager code where the transaction
11542 for a 64-bit address descriptor were handled incorrectly in the type-
11543 specific flag byte.
11545 Consolidated duplicate code within the address descriptor resource
11547 code, reducing overall subsystem code size.
11549 Fixed a fault when using the AML debugger "disassemble" command to
11550 disassemble individual control methods.
11552 Removed references to the "release_current" directory within the Unix
11555 Code and Data Size: The current and previous core subsystem library sizes
11556 are shown below. These are the code and data sizes for the acpica.lib
11557 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
11558 include any ACPI driver or OSPM code. The debug version of the code
11560 the debug output trace mechanism and has a much larger code and data
11562 Note that these values will vary depending on the efficiency of the
11564 and the compiler options used during generation.
11567 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11568 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
11570 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11571 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11574 2) iASL Compiler/Disassembler:
11576 Implemented an error check for illegal duplicate values in the interrupt
11578 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
11581 Implemented error checking for the Irq() and IrqNoFlags() macros to
11583 too many values in the interrupt list (16 max) and invalid values in the
11584 list (range 0 - 15)
11586 The maximum length string literal within an ASL file is now restricted to
11587 200 characters as per the ACPI specification.
11589 Fixed a fault when using the -ln option (generate namespace listing).
11591 Implemented an error check to determine if a DescriptorName within a
11592 resource descriptor has already been used within the current scope.
11594 ----------------------------------------
11595 15 August 2005. Summary of changes for version 20050815:
11597 1) ACPI CA Core Subsystem:
11599 Implemented a full bytewise compare to determine if a table load request
11601 attempting to load a duplicate table. The compare is performed if the
11603 signatures and table lengths match. This will allow different tables with
11604 the same OEM Table ID and revision to be loaded - probably against the
11606 specification, but discovered in the field nonetheless.
11608 Added the changes.txt logfile to each of the zipped release packages.
11610 Code and Data Size: Current and previous core subsystem library sizes are
11611 shown below. These are the code and data sizes for the acpica.lib
11613 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11614 any ACPI driver or OSPM code. The debug version of the code includes the
11615 debug output trace mechanism and has a much larger code and data size.
11617 that these values will vary depending on the efficiency of the compiler
11619 the compiler options used during generation.
11622 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11623 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
11625 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11626 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
11629 2) iASL Compiler/Disassembler:
11631 Fixed a problem where incorrect AML code could be generated for Package
11632 objects if optimization is disabled (via the -oa switch).
11634 Fixed a problem with where incorrect AML code is generated for variable-
11635 length packages when the package length is not specified and the number
11637 initializer values is greater than 255.
11640 ----------------------------------------
11641 29 July 2005. Summary of changes for version 20050729:
11643 1) ACPI CA Core Subsystem:
11645 Implemented support to ignore an attempt to install/load a particular
11647 table more than once. Apparently there exists BIOS code that repeatedly
11648 attempts to load the same SSDT upon certain events. With assistance from
11649 Venkatesh Pallipadi.
11651 Restructured the main interface to the AML parser in order to correctly
11652 handle all exceptional conditions. This will prevent leakage of the
11654 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
11656 machines. With assistance from Alexey Starikovskiy.
11658 Support for "module level code" has been disabled in this version due to
11660 number of issues that have appeared on various machines. The support can
11662 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
11663 compilation. When the issues are fully resolved, the code will be enabled
11667 Modified the internal functions for debug print support to define the
11668 FunctionName parameter as a (const char *) for compatibility with
11670 built-in macros such as __FUNCTION__, etc.
11672 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
11674 Implemented support to display an object count summary for the AML
11676 commands Object and Methods.
11678 Code and Data Size: Current and previous core subsystem library sizes are
11679 shown below. These are the code and data sizes for the acpica.lib
11681 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11682 any ACPI driver or OSPM code. The debug version of the code includes the
11683 debug output trace mechanism and has a much larger code and data size.
11685 that these values will vary depending on the efficiency of the compiler
11687 the compiler options used during generation.
11690 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
11691 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
11693 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11694 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
11697 2) iASL Compiler/Disassembler:
11699 Fixed a regression that appeared in the 20050708 version of the compiler
11700 where an error message was inadvertently emitted for invocations of the
11702 reserved control method.
11704 ----------------------------------------
11705 08 July 2005. Summary of changes for version 20050708:
11707 1) ACPI CA Core Subsystem:
11709 The use of the CPU stack in the debug version of the subsystem has been
11710 considerably reduced. Previously, a debug structure was declared in every
11711 function that used the debug macros. This structure has been removed in
11712 favor of declaring the individual elements as parameters to the debug
11713 functions. This reduces the cumulative stack use during nested execution
11715 ACPI function calls at the cost of a small increase in the code size of
11717 debug version of the subsystem. With assistance from Alexey Starikovskiy
11721 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
11722 headers to define a macro that will return the current function name at
11723 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
11725 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
11726 compiler-dependent header, the function name is saved on the CPU stack
11728 pointer per function.) This mechanism is used because apparently there
11729 exists no standard ANSI-C defined macro that that returns the function
11732 Redesigned and reimplemented the "Owner ID" mechanism used to track
11733 namespace objects created/deleted by ACPI tables and control method
11734 execution. A bitmap is now used to allocate and free the IDs, thus
11736 the wraparound problem present in the previous implementation. The size
11738 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
11741 Removed the UINT32_BIT and UINT16_BIT types that were used for the
11743 flag definitions within the headers for the predefined ACPI tables. These
11744 have been replaced by UINT8_BIT in order to increase the code portability
11746 the subsystem. If the use of UINT8 remains a problem, we may be forced to
11747 eliminate bitfields entirely because of a lack of portability.
11749 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
11751 is a frequently used function and this improvement increases the
11753 of the entire subsystem (Alexey Starikovskiy).
11755 Fixed several possible memory leaks and the inverse - premature object
11756 deletion (Alexey Starikovskiy).
11758 Code and Data Size: Current and previous core subsystem library sizes are
11759 shown below. These are the code and data sizes for the acpica.lib
11761 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11762 any ACPI driver or OSPM code. The debug version of the code includes the
11763 debug output trace mechanism and has a much larger code and data size.
11765 that these values will vary depending on the efficiency of the compiler
11767 the compiler options used during generation.
11770 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
11771 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
11773 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
11774 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
11776 ----------------------------------------
11777 24 June 2005. Summary of changes for version 20050624:
11779 1) ACPI CA Core Subsystem:
11781 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
11782 the host-defined cache object. This allows the OSL implementation to
11784 and type this object in any manner desired, simplifying the OSL
11785 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
11786 Linux, and should be defined in the OS-specific header file for other
11787 operating systems as required.
11789 Changed the interface to AcpiOsAcquireObject to directly return the
11790 requested object as the function return (instead of ACPI_STATUS.) This
11791 change was made for performance reasons, since this is the purpose of the
11792 interface in the first place. AcpiOsAcquireObject is now similar to the
11793 AcpiOsAllocate interface.
11795 Implemented a new AML debugger command named Businfo. This command
11797 information about all devices that have an associate _PRT object. The
11799 _HID, _UID, and _CID are displayed for these devices.
11801 Modified the initialization sequence in AcpiInitializeSubsystem to call
11803 OSL interface AcpiOslInitialize first, before any local initialization.
11805 change was required because the global initialization now calls OSL
11808 Enhanced the Dump command to display the entire contents of Package
11810 (including all sub-objects and their values.)
11812 Restructured the code base to split some files because of size and/or
11813 because the code logically belonged in a separate file. New files are
11815 below. All makefiles and project files included in the ACPI CA release
11818 utilities/utcache.c /* Local cache interfaces */
11819 utilities/utmutex.c /* Local mutex support */
11820 utilities/utstate.c /* State object support */
11821 interpreter/parser/psloop.c /* Main AML parse loop */
11823 Code and Data Size: Current and previous core subsystem library sizes are
11824 shown below. These are the code and data sizes for the acpica.lib
11826 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11827 any ACPI driver or OSPM code. The debug version of the code includes the
11828 debug output trace mechanism and has a much larger code and data size.
11830 that these values will vary depending on the efficiency of the compiler
11832 the compiler options used during generation.
11835 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
11836 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
11838 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
11839 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
11842 2) iASL Compiler/Disassembler:
11844 Fixed a regression introduced in version 20050513 where the use of a
11846 object within a Case() statement caused a compile time exception. The
11847 original behavior has been restored (a Match() operator is emitted.)
11849 ----------------------------------------
11850 17 June 2005. Summary of changes for version 20050617:
11852 1) ACPI CA Core Subsystem:
11854 Moved the object cache operations into the OS interface layer (OSL) to
11856 the host OS to handle these operations if desired (for example, the Linux
11857 OSL will invoke the slab allocator). This support is optional; the
11859 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
11861 code in the ACPI CA core. The new OSL interfaces are shown below. See
11862 utalloc.c for an example implementation, and acpiosxf.h for the exact
11863 interface definitions. With assistance from Alexey Starikovskiy.
11867 AcpiOsAcquireObject
11868 AcpiOsReleaseObject
11870 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
11872 and restore a flags parameter. This fits better with many OS lock models.
11873 Note: the current execution state (interrupt handler or not) is no longer
11874 passed to these interfaces. If necessary, the OSL must determine this
11876 by itself, a simple and fast operation. With assistance from Alexey
11879 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
11880 present if the revision of the RSDP was 2 or greater. According to the
11882 specification, the XSDT is optional in all cases, and the table manager
11883 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
11884 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
11888 Fixed an interpreter problem with the Mid() operator in the case of an
11890 string where the resulting output string is of zero length. It now
11892 returns a valid, null terminated string object instead of a string object
11893 with a null pointer.
11895 Fixed a problem with the control method argument handling to allow a
11897 to an Arg object that already contains an object of type Device. The
11899 object is now correctly overwritten. Previously, an error was returned.
11902 Enhanced the debugger Find command to emit object values in addition to
11904 found object pathnames. The output format is the same as the dump
11908 Enhanced the debugger Set command. It now has the ability to set the
11910 of any Named integer object in the namespace (Previously, only method
11912 and args could be set.)
11914 Code and Data Size: Current and previous core subsystem library sizes are
11915 shown below. These are the code and data sizes for the acpica.lib
11917 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11918 any ACPI driver or OSPM code. The debug version of the code includes the
11919 debug output trace mechanism and has a much larger code and data size.
11921 that these values will vary depending on the efficiency of the compiler
11923 the compiler options used during generation.
11926 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
11927 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
11929 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
11930 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
11933 2) iASL Compiler/Disassembler:
11935 Fixed a regression in the disassembler where if/else/while constructs
11937 output incorrectly. This problem was introduced in the previous release
11938 (20050526). This problem also affected the single-step disassembly in the
11941 Fixed a problem where compiling the reserved _OSI method would randomly
11943 rarely) produce compile errors.
11945 Enhanced the disassembler to emit compilable code in the face of
11947 AML resource descriptors. If the optional ResourceSourceIndex is present,
11948 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
11949 disassembly. Otherwise, the resulting code cannot be compiled without
11952 ----------------------------------------
11953 26 May 2005. Summary of changes for version 20050526:
11955 1) ACPI CA Core Subsystem:
11957 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
11958 the module level (not within a control method.) These opcodes are
11960 exactly once at the time the table is loaded. This type of code was legal
11962 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
11964 order to provide backwards compatibility with earlier BIOS
11966 This eliminates the "Encountered executable code at module level" warning
11967 that was previously generated upon detection of such code.
11969 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
11970 inadvertently be generated during the lookup of namespace objects in the
11971 second pass parse of ACPI tables and control methods. It appears that
11973 problem could occur during the resolution of forward references to
11977 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
11978 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
11979 allows the deadlock detection debug code to be compiled out in the normal
11980 case, improving mutex performance (and overall subsystem performance)
11983 Implemented a handful of miscellaneous fixes for possible memory leaks on
11984 error conditions and error handling control paths. These fixes were
11985 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
11987 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
11989 to prevent a fault in this error case.
11991 Code and Data Size: Current and previous core subsystem library sizes are
11992 shown below. These are the code and data sizes for the acpica.lib
11994 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11995 any ACPI driver or OSPM code. The debug version of the code includes the
11996 debug output trace mechanism and has a much larger code and data size.
11998 that these values will vary depending on the efficiency of the compiler
12000 the compiler options used during generation.
12003 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12004 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12006 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12007 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12010 2) iASL Compiler/Disassembler:
12012 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
12013 the module level (not within a control method.) These operators will be
12014 executed once at the time the table is loaded. This type of code was
12016 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
12017 compiler in order to provide backwards compatibility with earlier BIOS
12021 The ACPI integer width (specified via the table revision ID or the -r
12022 override, 32 or 64 bits) is now used internally during compile-time
12024 folding to ensure that constants are truncated to 32 bits if necessary.
12025 Previously, the revision ID value was only emitted in the AML table
12028 An error message is now generated for the Mutex and Method operators if
12030 SyncLevel parameter is outside the legal range of 0 through 15.
12032 Fixed a problem with the Method operator ParameterTypes list handling
12034 3.0). Previously, more than 2 types or 2 arguments generated a syntax
12036 The actual underlying implementation of method argument typechecking is
12037 still under development, however.
12039 ----------------------------------------
12040 13 May 2005. Summary of changes for version 20050513:
12042 1) ACPI CA Core Subsystem:
12044 Implemented support for PCI Express root bridges -- added support for
12046 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
12048 The interpreter now automatically truncates incoming 64-bit constants to
12050 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
12052 also affects the iASL compiler constant folding. (Note: as per below, the
12053 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
12055 Fixed a problem where string and buffer objects with "static" pointers
12056 (pointers to initialization data within an ACPI table) were not handled
12057 consistently. The internal object copy operation now always copies the
12059 to a newly allocated buffer, regardless of whether the source object is
12062 Fixed a problem with the FromBCD operator where an implicit result
12063 conversion was improperly performed while storing the result to the
12065 operand. Since this is an "explicit conversion" operator, the implicit
12066 conversion should never be performed on the output.
12068 Fixed a problem with the CopyObject operator where a copy to an existing
12069 named object did not always completely overwrite the existing object
12071 at name. Specifically, a buffer-to-buffer copy did not delete the
12075 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
12077 structs for consistency.
12079 Code and Data Size: Current and previous core subsystem library sizes are
12080 shown below. These are the code and data sizes for the acpica.lib
12082 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12083 any ACPI driver or OSPM code. The debug version of the code includes the
12084 debug output trace mechanism and has a much larger code and data size.
12086 that these values will vary depending on the efficiency of the compiler
12088 the compiler options used during generation.
12091 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12092 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12093 Current Release: (Same sizes)
12094 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12095 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12098 2) iASL Compiler/Disassembler:
12100 The compiler now emits a warning if an attempt is made to generate a 64-
12102 integer constant from within a 32-bit ACPI table (Revision < 2). The
12104 is truncated to 32 bits.
12106 Fixed a problem with large package objects: if the static length of the
12107 package is greater than 255, the "variable length package" opcode is
12108 emitted. Previously, this caused an error. This requires an update to the
12109 ACPI spec, since it currently (incorrectly) states that packages larger
12111 255 elements are not allowed.
12113 The disassembler now correctly handles variable length packages and
12115 larger than 255 elements.
12117 ----------------------------------------
12118 08 April 2005. Summary of changes for version 20050408:
12120 1) ACPI CA Core Subsystem:
12122 Fixed three cases in the interpreter where an "index" argument to an ASL
12123 function was still (internally) 32 bits instead of the required 64 bits.
12124 This was the Index argument to the Index, Mid, and Match operators.
12126 The "strupr" function is now permanently local (AcpiUtStrupr), since this
12128 not a POSIX-defined function and not present in most kernel-level C
12129 libraries. All references to the C library strupr function have been
12133 Completed the deployment of static functions/prototypes. All prototypes
12135 the static attribute have been moved from the headers to the owning C
12138 Implemented an extract option (-e) for the AcpiBin utility (AML binary
12139 utility). This option allows the utility to extract individual ACPI
12141 from the output of AcpiDmp. It provides the same functionality of the
12142 acpixtract.pl perl script without the worry of setting the correct perl
12143 options. AcpiBin runs on Windows and has not yet been generated/validated
12145 the Linux/Unix environment (but should be soon).
12147 Updated and fixed the table dump option for AcpiBin (-d). This option
12148 converts a single ACPI table to a hex/ascii file, similar to the output
12152 Code and Data Size: Current and previous core subsystem library sizes are
12153 shown below. These are the code and data sizes for the acpica.lib
12155 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12156 any ACPI driver or OSPM code. The debug version of the code includes the
12157 debug output trace mechanism and has a much larger code and data size.
12159 that these values will vary depending on the efficiency of the compiler
12161 the compiler options used during generation.
12164 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12165 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12167 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12168 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12171 2) iASL Compiler/Disassembler:
12173 Disassembler fix: Added a check to ensure that the table length found in
12175 ACPI table header within the input file is not longer than the actual
12177 file size. This indicates some kind of file or table corruption.
12179 ----------------------------------------
12180 29 March 2005. Summary of changes for version 20050329:
12182 1) ACPI CA Core Subsystem:
12184 An error is now generated if an attempt is made to create a Buffer Field
12186 length zero (A CreateField with a length operand of zero.)
12188 The interpreter now issues a warning whenever executable code at the
12190 level is detected during ACPI table load. This will give some idea of the
12191 prevalence of this type of code.
12193 Implemented support for references to named objects (other than control
12194 methods) within package objects.
12196 Enhanced package object output for the debug object. Package objects are
12198 completely dumped, showing all elements.
12200 Enhanced miscellaneous object output for the debug object. Any object can
12201 now be written to the debug object (for example, a device object can be
12202 written, and the type of the object will be displayed.)
12204 The "static" qualifier has been added to all local functions across both
12206 core subsystem and the iASL compiler.
12208 The number of "long" lines (> 80 chars) within the source has been
12209 significantly reduced, by about 1/3.
12211 Cleaned up all header files to ensure that all CA/iASL functions are
12212 prototyped (even static functions) and the formatting is consistent.
12214 Two new header files have been added, acopcode.h and acnames.h.
12216 Removed several obsolete functions that were no longer used.
12218 Code and Data Size: Current and previous core subsystem library sizes are
12219 shown below. These are the code and data sizes for the acpica.lib
12221 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12222 any ACPI driver or OSPM code. The debug version of the code includes the
12223 debug output trace mechanism and has a much larger code and data size.
12225 that these values will vary depending on the efficiency of the compiler
12227 the compiler options used during generation.
12230 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12231 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12233 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12234 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12238 2) iASL Compiler/Disassembler:
12240 Fixed a problem with the resource descriptor generation/support. For the
12241 ResourceSourceIndex and the ResourceSource fields, both must be present,
12243 both must be not present - can't have one without the other.
12245 The compiler now returns non-zero from the main procedure if any errors
12247 occurred during the compilation.
12250 ----------------------------------------
12251 09 March 2005. Summary of changes for version 20050309:
12253 1) ACPI CA Core Subsystem:
12255 The string-to-buffer implicit conversion code has been modified again
12257 a change to the ACPI specification. In order to match the behavior of
12259 other major ACPI implementation, the target buffer is no longer truncated
12261 the source string is smaller than an existing target buffer. This change
12262 requires an update to the ACPI spec, and should eliminate the recent
12263 AE_AML_BUFFER_LIMIT issues.
12265 The "implicit return" support was rewritten to a new algorithm that
12267 the general case. Rather than attempt to determine when a method is about
12269 exit, the result of every ASL operator is saved momentarily until the
12271 next ASL operator is executed. Therefore, no matter how the method exits,
12272 there will always be a saved implicit return value. This feature is only
12273 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
12275 AE_AML_NO_RETURN_VALUE errors when enabled.
12277 Implemented implicit conversion support for the predicate (operand) of
12279 If, Else, and While operators. String and Buffer arguments are
12281 converted to Integers.
12283 Changed the string-to-integer conversion behavior to match the new ACPI
12284 errata: "If no integer object exists, a new integer is created. The ASCII
12285 string is interpreted as a hexadecimal constant. Each string character is
12286 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
12287 with the first character as the most significant digit, and ending with
12289 first non-hexadecimal character or end-of-string." This means that the
12291 non-hex character terminates the conversion and this is the code that was
12294 Fixed a problem where the ObjectType operator would fail (fault) when
12296 on an Index of a Package which pointed to a null package element. The
12297 operator now properly returns zero (Uninitialized) in this case.
12299 Fixed a problem where the While operator used excessive memory by not
12300 properly popping the result stack during execution. There was no memory
12302 after execution, however. (Code provided by Valery Podrezov.)
12304 Fixed a problem where references to control methods within Package
12306 caused the method to be invoked, instead of producing a reference object
12307 pointing to the method.
12309 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
12311 improve performance and reduce code size. (Code provided by Alexey
12314 Code and Data Size: Current and previous core subsystem library sizes are
12315 shown below. These are the code and data sizes for the acpica.lib
12317 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12318 any ACPI driver or OSPM code. The debug version of the code includes the
12319 debug output trace mechanism and has a much larger code and data size.
12321 that these values will vary depending on the efficiency of the compiler
12323 the compiler options used during generation.
12326 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12327 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12329 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12330 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12333 2) iASL Compiler/Disassembler:
12335 Fixed a problem with the Return operator with no arguments. Since the AML
12336 grammar for the byte encoding requires an operand for the Return opcode,
12338 compiler now emits a Return(Zero) for this case. An ACPI specification
12339 update has been written for this case.
12341 For tables other than the DSDT, namepath optimization is automatically
12342 disabled. This is because SSDTs can be loaded anywhere in the namespace,
12344 compiler has no knowledge of where, and thus cannot optimize namepaths.
12346 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
12347 inadvertently omitted from the ACPI specification, and will require an
12348 update to the spec.
12350 The source file scan for ASCII characters is now optional (-a). This
12352 was made because some vendors place non-ascii characters within comments.
12353 However, the scan is simply a brute-force byte compare to ensure all
12354 characters in the file are in the range 0x00 to 0x7F.
12356 Fixed a problem with the CondRefOf operator where the compiler was
12357 inappropriately checking for the existence of the target. Since the point
12359 the operator is to check for the existence of the target at run-time, the
12360 compiler no longer checks for the target existence.
12362 Fixed a problem where errors generated from the internal AML interpreter
12363 during constant folding were not handled properly, causing a fault.
12365 Fixed a problem with overly aggressive range checking for the Stall
12366 operator. The valid range (max 255) is now only checked if the operand is
12368 type Integer. All other operand types cannot be statically checked.
12370 Fixed a problem where control method references within the RefOf,
12372 and ObjectType operators were not treated properly. They are now treated
12374 actual references, not method invocations.
12376 Fixed and enhanced the "list namespace" option (-ln). This option was
12378 a number of releases ago.
12380 Improved error handling for the Field, IndexField, and BankField
12382 The compiler now cleanly reports and recovers from errors in the field
12383 component (FieldUnit) list.
12385 Fixed a disassembler problem where the optional ResourceDescriptor fields
12386 TRS and TTP were not always handled correctly.
12388 Disassembler - Comments in output now use "//" instead of "/*"
12390 ----------------------------------------
12391 28 February 2005. Summary of changes for version 20050228:
12393 1) ACPI CA Core Subsystem:
12395 Fixed a problem where the result of an Index() operator (an object
12396 reference) must increment the reference count on the target object for
12398 life of the object reference.
12400 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
12401 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
12403 resource descriptors.
12405 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
12406 Space Descriptor" string, indicating interpreter support for the
12410 Implemented header support for the new ACPI 3.0 FADT flag bits.
12412 Implemented header support for the new ACPI 3.0 PCI Express bits for the
12414 status/enable registers.
12416 Updated header support for the MADT processor local Apic struct and MADT
12417 platform interrupt source struct for new ACPI 3.0 fields.
12419 Implemented header support for the SRAT and SLIT ACPI tables.
12421 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
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, 11.5K Data, 89.7K Total
12438 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12440 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12441 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12444 2) iASL Compiler/Disassembler:
12446 Fixed a problem with the internal 64-bit String-to-integer conversion
12448 strings less than two characters long.
12450 Fixed a problem with constant folding where the result of the Index()
12451 operator can not be considered a constant. This means that Index() cannot
12453 a type3 opcode and this will require an update to the ACPI specification.
12455 Disassembler: Implemented support for the TTP, MTP, and TRS resource
12456 descriptor fields. These fields were inadvertently ignored and not output
12458 the disassembly of the resource descriptor.
12461 ----------------------------------------
12462 11 February 2005. Summary of changes for version 20050211:
12464 1) ACPI CA Core Subsystem:
12466 Implemented ACPI 3.0 support for implicit conversion within the Match()
12467 operator. MatchObjects can now be of type integer, buffer, or string
12469 of just type integer. Package elements are implicitly converted to the
12471 of the MatchObject. This change aligns the behavior of Match() with the
12472 behavior of the other logical operators (LLess(), etc.) It also requires
12474 errata change to the ACPI specification as this support was intended for
12475 ACPI 3.0, but was inadvertently omitted.
12477 Fixed a problem with the internal implicit "to buffer" conversion.
12479 that are converted to buffers will cause buffer truncation if the string
12481 smaller than the target buffer. Integers that are converted to buffers
12483 not cause buffer truncation, only zero extension (both as per the ACPI
12484 spec.) The problem was introduced when code was added to truncate the
12485 buffer, but this should not be performed in all cases, only the string
12488 Fixed a problem with the Buffer and Package operators where the
12490 would get confused if two such operators were used as operands to an ASL
12491 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
12492 stack was not being popped after the execution of these operators,
12494 in an AE_NO_RETURN_VALUE exception.
12496 Fixed a problem with constructs of the form Store(Index(...),...). The
12497 reference object returned from Index was inadvertently resolved to an
12499 value. This problem was introduced in version 20050114 when the behavior
12501 Store() was modified to restrict the object types that can be used as the
12502 source operand (to match the ACPI specification.)
12504 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
12506 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
12508 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
12510 Code and Data Size: Current and previous core subsystem library sizes are
12511 shown below. These are the code and data sizes for the acpica.lib
12513 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12514 any ACPI driver or OSPM code. The debug version of the code includes the
12515 debug output trace mechanism and has a much larger code and data size.
12517 that these values will vary depending on the efficiency of the compiler
12519 the compiler options used during generation.
12522 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12523 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12525 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12526 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12529 2) iASL Compiler/Disassembler:
12531 Fixed a code generation problem in the constant folding optimization code
12532 where incorrect code was generated if a constant was reduced to a buffer
12533 object (i.e., a reduced type 5 opcode.)
12535 Fixed a typechecking problem for the ToBuffer operator. Caused by an
12536 incorrect return type in the internal opcode information table.
12538 ----------------------------------------
12539 25 January 2005. Summary of changes for version 20050125:
12541 1) ACPI CA Core Subsystem:
12543 Fixed a recently introduced problem with the Global Lock where the
12544 underlying semaphore was not created. This problem was introduced in
12545 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
12546 Acquire() operation on _GL.
12548 The local object cache is now optional, and is disabled by default. Both
12549 AcpiExec and the iASL compiler enable the cache because they run in user
12550 mode and this enhances their performance. #define
12551 ACPI_ENABLE_OBJECT_CACHE
12552 to enable the local cache.
12554 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
12556 optional "implicit return" support where an error was returned if no
12558 object was expected, but one was implicitly returned. AE_OK is now
12560 in this case and the implicitly returned object is deleted.
12561 AcpiUtEvaluateObject is only occasionally used, and only to execute
12563 methods such as _STA and _INI where the return type is known up front.
12565 Fixed a few issues with the internal convert-to-integer code. It now
12567 an error if an attempt is made to convert a null string, a string of only
12568 blanks/tabs, or a zero-length buffer. This affects both implicit
12570 and explicit conversion via the ToInteger() operator.
12572 The internal debug code in AcpiUtAcquireMutex has been commented out. It
12574 not needed for normal operation and should increase the performance of
12576 entire subsystem. The code remains in case it is needed for debug
12580 The AcpiExec source and makefile are included in the Unix/Linux package
12584 Code and Data Size: Current and previous core subsystem library sizes are
12585 shown below. These are the code and data sizes for the acpica.lib
12587 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12588 any ACPI driver or OSPM code. The debug version of the code includes the
12589 debug output trace mechanism and has a much larger code and data size.
12591 that these values will vary depending on the efficiency of the compiler
12593 the compiler options used during generation.
12596 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
12597 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
12599 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12600 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12602 2) iASL Compiler/Disassembler:
12604 Switch/Case support: A warning is now issued if the type of the Switch
12606 cannot be determined at compile time. For example, Switch(Arg0) will
12607 generate the warning, and the type is assumed to be an integer. As per
12609 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
12613 Switch/Case support: Implemented support for buffer and string objects as
12614 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
12615 buffers and strings.
12617 Switch/Case support: The emitted code for the LEqual() comparisons now
12619 the switch value as the first operand, not the second. The case value is
12621 the second operand, and this allows the case value to be implicitly
12622 converted to the type of the switch value, not the other way around.
12624 Switch/Case support: Temporary variables are now emitted immediately
12626 the control method, not at the global level. This means that there are
12628 36 temps available per-method, not 36 temps per-module as was the case
12630 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
12632 ----------------------------------------
12633 14 January 2005. Summary of changes for version 20050114:
12635 Added 2005 copyright to all module headers. This affects every module in
12636 the core subsystem, iASL compiler, and the utilities.
12638 1) ACPI CA Core Subsystem:
12640 Fixed an issue with the String-to-Buffer conversion code where the string
12641 null terminator was not included in the buffer after conversion, but
12643 is existing ASL that assumes the string null terminator is included. This
12645 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
12646 introduced in the previous version when the code was updated to correctly
12647 set the converted buffer size as per the ACPI specification. The ACPI
12649 is ambiguous and will be updated to specify that the null terminator must
12651 included in the converted buffer. This also affects the ToBuffer() ASL
12654 Fixed a problem with the Mid() ASL/AML operator where it did not work
12655 correctly on Buffer objects. Newly created sub-buffers were not being
12660 Fixed a problem in AcpiTbFindTable where incorrect string compares were
12661 performed on the OemId and OemTableId table header fields. These fields
12663 not null terminated, so strncmp is now used instead of strcmp.
12665 Implemented a restriction on the Store() ASL/AML operator to align the
12666 behavior with the ACPI specification. Previously, any object could be
12668 as the source operand. Now, the only objects that may be used are
12670 Buffers, Strings, Packages, Object References, and DDB Handles. If
12671 necessary, the original behavior can be restored by enabling the
12672 EnableInterpreterSlack flag.
12674 Enhanced the optional "implicit return" support to allow an implicit
12676 value from methods that are invoked externally via the AcpiEvaluateObject
12677 interface. This enables implicit returns from the _STA and _INI methods,
12680 Changed the Revision() ASL/AML operator to return the current version of
12682 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
12684 the supported ACPI version (This is the function of the _REV method).
12686 Updated the _REV predefined method to return the currently supported
12690 Implemented batch mode option for the AcpiExec utility (-b).
12692 Code and Data Size: Current and previous core subsystem library sizes are
12693 shown below. These are the code and data sizes for the acpica.lib
12695 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12696 any ACPI driver or OSPM code. The debug version of the code includes the
12697 debug output trace mechanism and has a much larger code and data size.
12699 that these values will vary depending on the efficiency of the compiler
12701 the compiler options used during generation.
12704 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12705 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
12707 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
12708 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
12710 ----------------------------------------
12711 10 December 2004. Summary of changes for version 20041210:
12713 ACPI 3.0 support is nearing completion in both the iASL compiler and the
12714 ACPI CA core subsystem.
12716 1) ACPI CA Core Subsystem:
12718 Fixed a problem in the ToDecimalString operator where the resulting
12720 length was incorrectly calculated. The length is now calculated exactly,
12721 eliminating incorrect AE_STRING_LIMIT exceptions.
12723 Fixed a problem in the ToHexString operator to allow a maximum 200
12725 string to be produced.
12727 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
12729 routine where the length of the resulting buffer was not truncated to the
12730 new size (if the target buffer already existed).
12732 Code and Data Size: Current and previous core subsystem library sizes are
12733 shown below. These are the code and data sizes for the acpica.lib
12735 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12736 any ACPI driver or OSPM code. The debug version of the code includes the
12737 debug output trace mechanism and has a much larger code and data size.
12739 that these values will vary depending on the efficiency of the compiler
12741 the compiler options used during generation.
12744 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12745 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
12747 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12748 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
12751 2) iASL Compiler/Disassembler:
12753 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
12754 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
12755 Includes support in the disassembler.
12757 Implemented support for the new (ACPI 3.0) parameter to the Register
12761 Fixed a problem where the _HE resource name for the Interrupt macro was
12762 referencing bit 0 instead of bit 1.
12764 Implemented check for maximum 255 interrupts in the Interrupt macro.
12766 Fixed a problem with the predefined resource descriptor names where
12767 incorrect AML code was generated if the offset within the resource buffer
12768 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
12769 but did not update the surrounding package lengths.
12771 Changes to the Dma macro: All channels within the channel list must be
12773 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
12774 optional (default is BusMaster).
12776 Implemented check for maximum 7 data bytes for the VendorShort macro.
12778 The ReadWrite parameter is now optional for the Memory32 and similar
12781 ----------------------------------------
12782 03 December 2004. Summary of changes for version 20041203:
12784 1) ACPI CA Core Subsystem:
12786 The low-level field insertion/extraction code (exfldio) has been
12788 rewritten to eliminate unnecessary complexity, bugs, and boundary
12791 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
12793 operators where the input operand could be inadvertently deleted if no
12794 conversion was necessary (e.g., if the input to ToInteger was an Integer
12797 Fixed a problem with the ToDecimalString and ToHexString where an
12799 exception code was returned if the resulting string would be > 200 chars.
12800 AE_STRING_LIMIT is now returned.
12802 Fixed a problem with the Concatenate operator where AE_OK was always
12803 returned, even if the operation failed.
12805 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
12806 semaphores to be allocated.
12808 Code and Data Size: Current and previous core subsystem library sizes are
12809 shown below. These are the code and data sizes for the acpica.lib
12811 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12812 any ACPI driver or OSPM code. The debug version of the code includes the
12813 debug output trace mechanism and has a much larger code and data size.
12815 that these values will vary depending on the efficiency of the compiler
12817 the compiler options used during generation.
12820 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12821 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12823 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12824 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
12827 2) iASL Compiler/Disassembler:
12829 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
12830 recently introduced in 20041119.
12832 Fixed a problem with the ToUUID macro where the upper nybble of each
12834 byte was inadvertently set to zero.
12836 ----------------------------------------
12837 19 November 2004. Summary of changes for version 20041119:
12839 1) ACPI CA Core Subsystem:
12841 Fixed a problem in the internal ConvertToInteger routine where new
12843 were not truncated to 32 bits for 32-bit ACPI tables. This routine
12845 buffers and strings to integers.
12847 Implemented support to store a value to an Index() on a String object.
12849 is an ACPI 2.0 feature that had not yet been implemented.
12851 Implemented new behavior for storing objects to individual package
12853 (via the Index() operator). The previous behavior was to invoke the
12855 conversion rules if an object was already present at the index. The new
12856 behavior is to simply delete any existing object and directly store the
12858 object. Although the ACPI specification seems unclear on this subject,
12860 ACPI implementations behave in this manner. (This is the root of the
12861 AE_BAD_HEX_CONSTANT issue.)
12863 Modified the RSDP memory scan mechanism to support the extended checksum
12865 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
12866 RSDP signature is found with a valid checksum.
12868 Code and Data Size: Current and previous core subsystem library sizes are
12869 shown below. These are the code and data sizes for the acpica.lib
12871 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12872 any ACPI driver or OSPM code. The debug version of the code includes the
12873 debug output trace mechanism and has a much larger code and data size.
12875 that these values will vary depending on the efficiency of the compiler
12877 the compiler options used during generation.
12880 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12881 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12883 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12884 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12887 2) iASL Compiler/Disassembler:
12889 Fixed a missing semicolon in the aslcompiler.y file.
12891 ----------------------------------------
12892 05 November 2004. Summary of changes for version 20041105:
12894 1) ACPI CA Core Subsystem:
12896 Implemented support for FADT revision 2. This was an interim table
12898 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
12900 Implemented optional support to allow uninitialized LocalX and ArgX
12901 variables in a control method. The variables are initialized to an
12903 object with a value of zero. This support is enabled by setting the
12904 AcpiGbl_EnableInterpreterSlack flag to TRUE.
12906 Implemented support for Integer objects for the SizeOf operator. Either
12908 or 8 is returned, depending on the current integer size (32-bit or 64-
12910 depending on the parent table revision).
12912 Fixed a problem in the implementation of the SizeOf and ObjectType
12914 where the operand was resolved to a value too early, causing incorrect
12915 return values for some objects.
12917 Fixed some possible memory leaks during exceptional conditions.
12919 Code and Data Size: Current and previous core subsystem library sizes are
12920 shown below. These are the code and data sizes for the acpica.lib
12922 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12923 any ACPI driver or OSPM code. The debug version of the code includes the
12924 debug output trace mechanism and has a much larger code and data size.
12926 that these values will vary depending on the efficiency of the compiler
12928 the compiler options used during generation.
12931 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
12932 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
12934 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12935 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12938 2) iASL Compiler/Disassembler:
12940 Implemented support for all ACPI 3.0 reserved names and methods.
12942 Implemented all ACPI 3.0 grammar elements in the front-end, including
12943 support for semicolons.
12945 Implemented the ACPI 3.0 Function() and ToUUID() macros
12947 Fixed a problem in the disassembler where a Scope() operator would not be
12948 emitted properly if the target of the scope was in another table.
12950 ----------------------------------------
12951 15 October 2004. Summary of changes for version 20041015:
12953 Note: ACPI CA is currently undergoing an in-depth and complete formal
12954 evaluation to test/verify the following areas. Other suggestions are
12955 welcome. This will result in an increase in the frequency of releases and
12956 the number of bug fixes in the next few months.
12957 - Functional tests for all ASL/AML operators
12958 - All implicit/explicit type conversions
12959 - Bit fields and operation regions
12960 - 64-bit math support and 32-bit-only "truncated" math support
12961 - Exceptional conditions, both compiler and interpreter
12962 - Dynamic object deletion and memory leaks
12963 - ACPI 3.0 support when implemented
12964 - External interfaces to the ACPI subsystem
12967 1) ACPI CA Core Subsystem:
12969 Fixed two alignment issues on 64-bit platforms - within debug statements
12971 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
12973 field within the non-aligned ACPI generic address structure.
12975 Fixed a problem in the Increment and Decrement operators where incorrect
12976 operand resolution could result in the inadvertent modification of the
12977 original integer when the integer is passed into another method as an
12978 argument and the arg is then incremented/decremented.
12980 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
12982 BCD number were truncated during conversion.
12984 Fixed a problem in the ToDecimal operator where the length of the
12986 string could be set incorrectly too long if the input operand was a
12990 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
12992 within a buffer would prematurely terminate a compare between buffer
12995 Added a check for string overflow (>200 characters as per the ACPI
12996 specification) during the Concatenate operator with two string operands.
12998 Code and Data Size: Current and previous core subsystem library sizes are
12999 shown below. These are the code and data sizes for the acpica.lib
13001 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13002 any ACPI driver or OSPM code. The debug version of the code includes the
13003 debug output trace mechanism and has a much larger code and data size.
13005 that these values will vary depending on the efficiency of the compiler
13007 the compiler options used during generation.
13010 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13011 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13013 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13014 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13018 2) iASL Compiler/Disassembler:
13020 Allow the use of the ObjectType operator on uninitialized Locals and Args
13021 (returns 0 as per the ACPI specification).
13023 Fixed a problem where the compiler would fault if there was a syntax
13025 in the FieldName of all of the various CreateXXXField operators.
13027 Disallow the use of lower case letters within the EISAID macro, as per
13029 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
13031 U is an uppercase letter and N is a hex digit.
13034 ----------------------------------------
13035 06 October 2004. Summary of changes for version 20041006:
13037 1) ACPI CA Core Subsystem:
13039 Implemented support for the ACPI 3.0 Timer operator. This ASL function
13040 implements a 64-bit timer with 100 nanosecond granularity.
13042 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
13043 implement the ACPI 3.0 Timer operator. This allows the host OS to
13045 the timer with the best clock available. Also, it keeps the core
13047 out of the clock handling business, since the host OS (usually) performs
13050 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
13051 functions use a 64-bit address which is part of the packed ACPI Generic
13052 Address Structure. Since the structure is non-aligned, the alignment
13054 are now used to extract the address to a local variable before use.
13056 Fixed a problem where the ToInteger operator assumed all input strings
13058 hexadecimal. The operator now handles both decimal strings and hex
13060 (prefixed with "0x").
13062 Fixed a problem where the string length in the string object created as a
13063 result of the internal ConvertToString procedure could be incorrect. This
13064 potentially affected all implicit conversions and also the
13066 and ToHexString operators.
13068 Fixed two problems in the ToString operator. If the length parameter was
13069 zero, an incorrect string object was created and the value of the input
13070 length parameter was inadvertently changed from zero to Ones.
13072 Fixed a problem where the optional ResourceSource string in the
13074 resource macro was ignored.
13076 Simplified the interfaces to the internal division functions, reducing
13078 size and complexity.
13080 Code and Data Size: Current and previous core subsystem library sizes are
13081 shown below. These are the code and data sizes for the acpica.lib
13083 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13084 any ACPI driver or OSPM code. The debug version of the code includes the
13085 debug output trace mechanism and has a much larger code and data size.
13087 that these values will vary depending on the efficiency of the compiler
13089 the compiler options used during generation.
13092 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13093 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13095 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13096 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13099 2) iASL Compiler/Disassembler:
13101 Implemented support for the ACPI 3.0 Timer operator.
13103 Fixed a problem where the Default() operator was inadvertently ignored in
13105 Switch/Case block. This was a problem in the translation of the Switch
13106 statement to If...Else pairs.
13108 Added support to allow a standalone Return operator, with no parentheses
13112 Fixed a problem with code generation for the ElseIf operator where the
13113 translated Else...If parse tree was improperly constructed leading to the
13116 ----------------------------------------
13117 22 September 2004. Summary of changes for version 20040922:
13119 1) ACPI CA Core Subsystem:
13121 Fixed a problem with the implementation of the LNot() operator where
13123 was not returned for the TRUE case. Changed the code to return Ones
13125 of (!Arg) which was usually 1. This change affects iASL constant folding
13127 this operator also.
13129 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
13131 initialized properly -- Now zero the entire buffer in this case where the
13132 buffer already exists.
13134 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
13135 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
13136 related code considerably. This will require changes/updates to all OS
13137 interface layers (OSLs.)
13139 Implemented a new external interface, AcpiInstallExceptionHandler, to
13141 a system exception handler to be installed. This handler is invoked upon
13143 run-time exception that occurs during control method execution.
13145 Added support for the DSDT in AcpiTbFindTable. This allows the
13146 DataTableRegion() operator to access the local copy of the DSDT.
13148 Code and Data Size: Current and previous core subsystem library sizes are
13149 shown below. These are the code and data sizes for the acpica.lib
13151 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13152 any ACPI driver or OSPM code. The debug version of the code includes the
13153 debug output trace mechanism and has a much larger code and data size.
13155 that these values will vary depending on the efficiency of the compiler
13157 the compiler options used during generation.
13160 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13161 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13163 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13164 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13167 2) iASL Compiler/Disassembler:
13169 Fixed a problem with constant folding and the LNot operator. LNot was
13170 returning 1 in the TRUE case, not Ones as per the ACPI specification.
13172 could result in the generation of an incorrect folded/reduced constant.
13174 End-Of-File is now allowed within a "//"-style comment. A parse error no
13175 longer occurs if such a comment is at the very end of the input ASL
13179 Implemented the "-r" option to override the Revision in the table header.
13180 The initial use of this option will be to simplify the evaluation of the
13182 interpreter by allowing a single ASL source module to be compiled for
13184 32-bit or 64-bit integers.
13187 ----------------------------------------
13188 27 August 2004. Summary of changes for version 20040827:
13190 1) ACPI CA Core Subsystem:
13192 - Implemented support for implicit object conversion in the non-numeric
13193 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
13195 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
13196 the second operand is implicitly converted on the fly to match the type
13198 the first operand. For example:
13200 LEqual (Source1, Source2)
13202 Source1 and Source2 must each evaluate to an integer, a string, or a
13204 The data type of Source1 dictates the required type of Source2. Source2
13206 implicitly converted if necessary to match the type of Source1.
13208 - Updated and corrected the behavior of the string conversion support.
13210 rules concerning conversion of buffers to strings (according to the ACPI
13211 specification) are as follows:
13213 ToDecimalString - explicit byte-wise conversion of buffer to string of
13214 decimal values (0-255) separated by commas. ToHexString - explicit byte-
13216 conversion of buffer to string of hex values (0-FF) separated by commas.
13217 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
13219 copy with no transform except NULL terminated. Any other implicit buffer-
13221 string conversion - byte-wise conversion of buffer to string of hex
13223 (0-FF) separated by spaces.
13225 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
13227 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
13229 one byte too short in the case of a node in the root scope. This could
13230 cause a fault during debug output.
13232 - Code and Data Size: Current and previous core subsystem library sizes
13234 shown below. These are the code and data sizes for the acpica.lib
13236 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13237 any ACPI driver or OSPM code. The debug version of the code includes the
13238 debug output trace mechanism and has a much larger code and data size.
13240 that these values will vary depending on the efficiency of the compiler
13242 the compiler options used during generation.
13245 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13246 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13248 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13249 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13252 2) iASL Compiler/Disassembler:
13254 - Fixed a Linux generation error.
13257 ----------------------------------------
13258 16 August 2004. Summary of changes for version 20040816:
13260 1) ACPI CA Core Subsystem:
13262 Designed and implemented support within the AML interpreter for the so-
13263 called "implicit return". This support returns the result of the last
13265 operation within a control method, in the absence of an explicit Return()
13266 operator. A few machines depend on this behavior, even though it is not
13267 explicitly supported by the ASL language. It is optional support that
13269 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
13271 Removed support for the PCI_Config address space from the internal low
13273 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
13274 support was not used internally, and would not work correctly anyway
13276 the PCI bus number and segment number were not supported. There are
13277 separate interfaces for PCI configuration space access because of the
13281 Code and Data Size: Current and previous core subsystem library sizes are
13282 shown below. These are the code and data sizes for the acpica.lib
13284 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13285 any ACPI driver or OSPM code. The debug version of the code includes the
13286 debug output trace mechanism and has a much larger code and data size.
13288 that these values will vary depending on the efficiency of the compiler
13290 the compiler options used during generation.
13293 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13294 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13296 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13297 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13300 2) iASL Compiler/Disassembler:
13302 Fixed a problem where constants in ASL expressions at the root level (not
13303 within a control method) could be inadvertently truncated during code
13304 generation. This problem was introduced in the 20040715 release.
13307 ----------------------------------------
13308 15 July 2004. Summary of changes for version 20040715:
13310 1) ACPI CA Core Subsystem:
13312 Restructured the internal HW GPE interfaces to pass/track the current
13314 of interrupts (enabled/disabled) in order to avoid possible deadlock and
13315 increase flexibility of the interfaces.
13317 Implemented a "lexicographical compare" for String and Buffer objects
13319 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
13321 as per further clarification to the ACPI specification. Behavior is
13323 to C library "strcmp".
13325 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
13326 external function. In the 32-bit non-debug case, the stack use has been
13327 reduced from 168 bytes to 32 bytes.
13329 Deployed a new run-time configuration flag,
13330 AcpiGbl_EnableInterpreterSlack,
13331 whose purpose is to allow the AML interpreter to forgive certain bad AML
13332 constructs. Default setting is FALSE.
13334 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
13336 support code. If enabled, it allows field access to go beyond the end of
13338 region definition if the field is within the region length rounded up to
13340 next access width boundary (a common coding error.)
13342 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
13343 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
13345 symbols are lowercased by the latest version of the AcpiSrc tool.
13347 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
13348 rename "Register" to simply "Reg" to prevent certain compilers from
13351 Code and Data Size: Current and previous core subsystem library sizes are
13352 shown below. These are the code and data sizes for the acpica.lib
13354 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13355 any ACPI driver or OSPM code. The debug version of the code includes the
13356 debug output trace mechanism and has a much larger code and data size.
13358 that these values will vary depending on the efficiency of the compiler
13360 the compiler options used during generation.
13363 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13364 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13366 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13367 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13370 2) iASL Compiler/Disassembler:
13372 Implemented full support for Package objects within the Case() operator.
13373 Note: The Break() operator is currently not supported within Case blocks
13374 (TermLists) as there is some question about backward compatibility with
13379 Fixed a problem where complex terms were not supported properly within
13383 Eliminated extraneous warning for compiler-emitted reserved names of the
13384 form "_T_x". (Used in Switch/Case operators.)
13386 Eliminated optimization messages for "_T_x" objects and small constants
13387 within the DefinitionBlock operator.
13390 ----------------------------------------
13391 15 June 2004. Summary of changes for version 20040615:
13393 1) ACPI CA Core Subsystem:
13395 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13397 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13400 All directory names in the entire source package are lower case, as they
13401 were in earlier releases.
13403 Implemented "Disassemble" command in the AML debugger that will
13405 a single control method.
13407 Code and Data Size: Current and previous core subsystem library sizes are
13408 shown below. These are the code and data sizes for the acpica.lib
13410 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13411 any ACPI driver or OSPM code. The debug version of the code includes the
13412 debug output trace mechanism and has a much larger code and data size.
13414 that these values will vary depending on the efficiency of the compiler
13416 the compiler options used during generation.
13419 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13420 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13423 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13424 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13427 2) iASL Compiler/Disassembler:
13429 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13431 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13434 All directory names in the entire source package are lower case, as they
13435 were in earlier releases.
13437 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
13440 Fixed an issue with the Windows version of the compiler where later
13442 of Windows place the FADT in the registry under the name "FADT" and not
13443 "FACP" as earlier versions did. This applies when using the -g or -
13444 d<nofilename> options. The compiler now looks for both strings as
13447 Fixed a problem with compiler namepath optimization where a namepath
13449 the Scope() operator could not be optimized if the namepath was a subpath
13451 the current scope path.
13453 ----------------------------------------
13454 27 May 2004. Summary of changes for version 20040527:
13456 1) ACPI CA Core Subsystem:
13458 Completed a new design and implementation for EBDA (Extended BIOS Data
13460 support in the RSDP scan code. The original code improperly scanned for
13462 EBDA by simply scanning from memory location 0 to 0x400. The correct
13464 is to first obtain the EBDA pointer from within the BIOS data area, then
13465 scan 1K of memory starting at the EBDA pointer. There appear to be few
13467 any machines that place the RSDP in the EBDA, however.
13469 Integrated a fix for a possible fault during evaluation of BufferField
13470 arguments. Obsolete code that was causing the problem was removed.
13472 Found and fixed a problem in the Field Support Code where data could be
13473 corrupted on a bit field read that starts on an aligned boundary but does
13474 not end on an aligned boundary. Merged the read/write "datum length"
13475 calculation code into a common procedure.
13477 Rolled in a couple of changes to the FreeBSD-specific header.
13480 Code and Data Size: Current and previous core subsystem library sizes are
13481 shown below. These are the code and data sizes for the acpica.lib
13483 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13484 any ACPI driver or OSPM code. The debug version of the code includes the
13485 debug output trace mechanism and has a much larger code and data size.
13487 that these values will vary depending on the efficiency of the compiler
13489 the compiler options used during generation.
13492 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13493 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13495 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13496 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13499 2) iASL Compiler/Disassembler:
13501 Fixed a generation warning produced by some overly-verbose compilers for
13505 ----------------------------------------
13506 14 May 2004. Summary of changes for version 20040514:
13508 1) ACPI CA Core Subsystem:
13510 Fixed a problem where hardware GPE enable bits sometimes not set properly
13511 during and after GPE method execution. Result of 04/27 changes.
13513 Removed extra "clear all GPEs" when sleeping/waking.
13515 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
13516 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
13518 the new AcpiEv* calls as appropriate.
13520 ACPI_OS_NAME was removed from the OS-specific headers. The default name
13522 now "Microsoft Windows NT" for maximum compatibility. However this can
13524 changed by modifying the acconfig.h file.
13526 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
13527 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
13529 Run _INI methods on ThermalZone objects. This is against the ACPI
13530 specification, but there is apparently ASL code in the field that has
13532 _INI methods, and apparently "other" AML interpreters execute them.
13534 Performed a full 16/32/64 bit lint that resulted in some small changes.
13536 Added a sleep simulation command to the AML debugger to test sleep code.
13538 Code and Data Size: Current and previous core subsystem library sizes are
13539 shown below. These are the code and data sizes for the acpica.lib
13541 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13542 any ACPI driver or OSPM code. The debug version of the code includes the
13543 debug output trace mechanism and has a much larger code and data size.
13545 that these values will vary depending on the efficiency of the compiler
13547 the compiler options used during generation.
13550 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13551 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13553 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13554 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13556 ----------------------------------------
13557 27 April 2004. Summary of changes for version 20040427:
13559 1) ACPI CA Core Subsystem:
13561 Completed a major overhaul of the GPE handling within ACPI CA. There are
13562 now three types of GPEs: wake-only, runtime-only, and combination
13564 The only GPEs allowed to be combination wake/run are for button-style
13565 devices such as a control-method power button, control-method sleep
13567 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
13569 referenced by any _PRW methods are marked for "runtime" and hardware
13570 enabled. Any GPE that is referenced by a _PRW method is marked for
13572 (and disabled at runtime). However, at sleep time, only those GPEs that
13573 have been specifically enabled for wake via the AcpiEnableGpe interface
13575 actually be hardware enabled.
13577 A new external interface has been added, AcpiSetGpeType(), that is meant
13579 be used by device drivers to force a GPE to a particular type. It will
13581 especially useful for the drivers for the button devices mentioned above.
13583 Completed restructuring of the ACPI CA initialization sequence so that
13584 default operation region handlers are installed before GPEs are
13586 and the _PRW methods are executed. This will prevent errors when the
13588 methods attempt to access system memory or I/O space.
13590 GPE enable/disable no longer reads the GPE enable register. We now keep
13592 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
13593 thus no longer depend on the hardware to maintain these bits.
13595 Always clear the wake status and fixed/GPE status bits before sleep, even
13598 Improved the AML debugger output for displaying the GPE blocks and their
13601 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
13605 Fixed a problem where the physical address was incorrectly calculated
13607 the Load() operator was used to directly load from an Operation Region
13609 loading from a Field object.) Also added check for minimum table length
13613 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
13616 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
13617 consistency with the other fields returned.
13619 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
13620 structure for each GPE in the system, so the size of this structure is
13623 CPU stack requirement reduction: Cleaned up the method execution and
13625 evaluation paths so that now a parameter structure is passed, instead of
13626 copying the various method parameters over and over again.
13628 In evregion.c: Correctly exit and reenter the interpreter region if and
13629 only if dispatching an operation region request to a user-installed
13631 Do not exit/reenter when dispatching to a default handler (e.g., default
13632 system memory or I/O handlers)
13635 Notes for updating drivers for the new GPE support. The following
13637 must be made to ACPI-related device drivers that are attached to one or
13639 GPEs: (This information will be added to the ACPI CA Programmer
13642 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
13644 explicitly call AcpiEnableGpe.
13645 2) There is a new interface called AcpiSetGpeType. This should be called
13646 before enabling the GPE. Also, this interface will automatically disable
13647 the GPE if it is currently enabled.
13648 3) AcpiEnableGpe no longer supports a GPE type flag.
13650 Specific drivers that must be changed:
13652 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
13653 AeGpeHandler, NULL);
13654 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
13655 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
13657 2) Button Drivers (Power, Lid, Sleep):
13658 Run _PRW method under parent device
13659 If _PRW exists: /* This is a control-method button */
13660 Extract GPE number and possibly GpeDevice
13661 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
13662 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
13664 For all other devices that have _PRWs, we automatically set the GPE type
13666 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
13668 must be done on a selective basis, usually requiring some kind of user
13670 to allow the user to pick the wake devices.
13673 Code and Data Size: Current and previous core subsystem library sizes are
13674 shown below. These are the code and data sizes for the acpica.lib
13676 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13677 any ACPI driver or OSPM code. The debug version of the code includes the
13678 debug output trace mechanism and has a much larger code and data size.
13680 that these values will vary depending on the efficiency of the compiler
13682 the compiler options used during generation.
13685 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
13686 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
13689 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13690 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13694 ----------------------------------------
13695 02 April 2004. Summary of changes for version 20040402:
13697 1) ACPI CA Core Subsystem:
13699 Fixed an interpreter problem where an indirect store through an ArgX
13700 parameter was incorrectly applying the "implicit conversion rules" during
13701 the store. From the ACPI specification: "If the target is a method local
13703 argument (LocalX or ArgX), no conversion is performed and the result is
13704 stored directly to the target". The new behavior is to disable implicit
13705 conversion during ALL stores to an ArgX.
13707 Changed the behavior of the _PRW method scan to ignore any and all errors
13708 returned by a given _PRW. This prevents the scan from aborting from the
13709 failure of any single _PRW.
13711 Moved the runtime configuration parameters from the global init procedure
13713 static variables in acglobal.h. This will allow the host to override the
13714 default values easily.
13716 Code and Data Size: Current and previous core subsystem library sizes are
13717 shown below. These are the code and data sizes for the acpica.lib
13719 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13720 any ACPI driver or OSPM code. The debug version of the code includes the
13721 debug output trace mechanism and has a much larger code and data size.
13723 that these values will vary depending on the efficiency of the compiler
13725 the compiler options used during generation.
13728 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
13729 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
13731 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
13732 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
13735 2) iASL Compiler/Disassembler:
13737 iASL now fully disassembles SSDTs. However, External() statements are
13739 generated automatically for unresolved symbols at this time. This is a
13740 planned feature for future implementation.
13742 Fixed a scoping problem in the disassembler that occurs when the type of
13744 target of a Scope() operator is overridden. This problem caused an
13745 incorrectly nested internal namespace to be constructed.
13747 Any warnings or errors that are emitted during disassembly are now
13749 out automatically so that the resulting file can be recompiled without
13753 ----------------------------------------
13754 26 March 2004. Summary of changes for version 20040326:
13756 1) ACPI CA Core Subsystem:
13758 Implemented support for "wake" GPEs via interaction between GPEs and the
13759 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
13760 identified as a WAKE GPE and by default will no longer be enabled at
13761 runtime. Previously, we were blindly enabling all GPEs with a
13763 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
13765 believe this has been the cause of thousands of "spurious" GPEs on some
13768 This new GPE behavior is can be reverted to the original behavior (enable
13769 ALL GPEs at runtime) via a runtime flag.
13771 Fixed a problem where aliased control methods could not access objects
13772 properly. The proper scope within the namespace was not initialized
13773 (transferred to the target of the aliased method) before executing the
13776 Fixed a potential race condition on internal object deletion on the
13778 object in AcpiEvaluateObject.
13780 Integrated a fix for resource descriptors where both _MEM and _MTP were
13781 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
13782 wide, 0x0F instead of 0x03.)
13784 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
13787 fault in some cases.
13789 Updated Notify() values for debug statements in evmisc.c
13791 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
13793 Code and Data Size: Current and previous core subsystem library sizes are
13794 shown below. These are the code and data sizes for the acpica.lib
13796 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13797 any ACPI driver or OSPM code. The debug version of the code includes the
13798 debug output trace mechanism and has a much larger code and data size.
13800 that these values will vary depending on the efficiency of the compiler
13802 the compiler options used during generation.
13806 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
13807 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
13809 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
13810 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
13812 ----------------------------------------
13813 11 March 2004. Summary of changes for version 20040311:
13815 1) ACPI CA Core Subsystem:
13817 Fixed a problem where errors occurring during the parse phase of control
13818 method execution did not abort cleanly. For example, objects created and
13819 installed in the namespace were not deleted. This caused all subsequent
13820 invocations of the method to return the AE_ALREADY_EXISTS exception.
13822 Implemented a mechanism to force a control method to "Serialized"
13824 if the method attempts to create namespace objects. (The root of the
13825 AE_ALREADY_EXISTS problem.)
13827 Implemented support for the predefined _OSI "internal" control method.
13828 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
13830 "Windows 2001.1", and can be easily upgraded for new strings as
13832 This feature will allow "other" operating systems to execute the fully
13833 tested, "Windows" code path through the ASL code
13835 Global Lock Support: Now allows multiple acquires and releases with any
13836 internal thread. Removed concept of "owning thread" for this special
13839 Fixed two functions that were inappropriately declaring large objects on
13841 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
13843 method execution considerably.
13845 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
13846 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
13848 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
13849 defined on the machine.
13851 Implemented two runtime options: One to force all control method
13853 to "Serialized" to mimic Windows behavior, another to disable _OSI
13855 if it causes problems on a given machine.
13857 Code and Data Size: Current and previous core subsystem library sizes are
13858 shown below. These are the code and data sizes for the acpica.lib
13860 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13861 any ACPI driver or OSPM code. The debug version of the code includes the
13862 debug output trace mechanism and has a much larger code and data size.
13864 that these values will vary depending on the efficiency of the compiler
13866 the compiler options used during generation.
13869 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
13870 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
13872 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
13873 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
13875 2) iASL Compiler/Disassembler:
13877 Fixed an array size problem for FreeBSD that would cause the compiler to
13880 ----------------------------------------
13881 20 February 2004. Summary of changes for version 20040220:
13884 1) ACPI CA Core Subsystem:
13886 Implemented execution of _SxD methods for Device objects in the
13887 GetObjectInfo interface.
13889 Fixed calls to _SST method to pass the correct arguments.
13891 Added a call to _SST on wake to restore to "working" state.
13893 Check for End-Of-Buffer failure case in the WalkResources interface.
13895 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
13896 structures to the beginning of the file.
13898 After wake, clear GPE status register(s) before enabling GPEs.
13900 After wake, clear/enable power button. (Perhaps we should clear/enable
13902 fixed events upon wake.)
13904 Fixed a couple of possible memory leaks in the Namespace manager.
13906 Integrated latest acnetbsd.h file.
13908 ----------------------------------------
13909 11 February 2004. Summary of changes for version 20040211:
13912 1) ACPI CA Core Subsystem:
13914 Completed investigation and implementation of the call-by-reference
13915 mechanism for control method arguments.
13917 Fixed a problem where a store of an object into an indexed package could
13918 fail if the store occurs within a different method than the method that
13919 created the package.
13921 Fixed a problem where the ToDecimal operator could return incorrect
13924 Fixed a problem where the CopyObject operator could fail on some of the
13926 obscure objects (e.g., Reference objects.)
13928 Improved the output of the Debug object to display buffer, package, and
13931 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
13933 the expected result.
13935 Added permanent ACPI_REPORT_ERROR macros for all instances of the
13936 ACPI_AML_INTERNAL exception.
13938 Integrated latest version of acfreebsd.h
13940 ----------------------------------------
13941 16 January 2004. Summary of changes for version 20040116:
13943 The purpose of this release is primarily to update the copyright years in
13944 each module, thus causing a huge number of diffs. There are a few small
13945 functional changes, however.
13947 1) ACPI CA Core Subsystem:
13949 Improved error messages when there is a problem finding one or more of
13951 required base ACPI tables
13953 Reintroduced the definition of APIC_HEADER in actbl.h
13955 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
13957 Removed extraneous reference to NewObj in dsmthdat.c
13961 Fixed a problem introduced in December that disabled the correct
13963 of Resource Templates
13966 ----------------------------------------
13967 03 December 2003. Summary of changes for version 20031203:
13969 1) ACPI CA Core Subsystem:
13971 Changed the initialization of Operation Regions during subsystem
13972 init to perform two entire walks of the ACPI namespace; The first
13973 to initialize the regions themselves, the second to execute the
13974 _REG methods. This fixed some interdependencies across _REG
13975 methods found on some machines.
13977 Fixed a problem where a Store(Local0, Local1) could simply update
13978 the object reference count, and not create a new copy of the
13979 object if the Local1 is uninitialized.
13981 Implemented support for the _SST reserved method during sleep
13984 Implemented support to clear the SLP_TYP and SLP_EN bits when
13985 waking up, this is apparently required by some machines.
13987 When sleeping, clear the wake status only if SleepState is not S5.
13989 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
13990 pointer arithmetic advanced a string pointer too far.
13992 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
13993 could be returned if the requested table has not been loaded.
13995 Within the support for IRQ resources, restructured the handling of
13996 the active and edge/level bits.
13998 Fixed a few problems in AcpiPsxExecute() where memory could be
13999 leaked under certain error conditions.
14001 Improved error messages for the cases where the ACPI mode could
14004 Code and Data Size: Current and previous core subsystem library
14005 sizes are shown below. These are the code and data sizes for the
14006 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14007 these values do not include any ACPI driver or OSPM code. The
14008 debug version of the code includes the debug output trace
14009 mechanism and has a much larger code and data size. Note that
14010 these values will vary depending on the efficiency of the compiler
14011 and the compiler options used during generation.
14013 Previous Release (20031029):
14014 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14015 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14017 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14018 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14020 2) iASL Compiler/Disassembler:
14022 Implemented a fix for the iASL disassembler where a bad index was
14023 generated. This was most noticeable on 64-bit platforms
14026 ----------------------------------------
14027 29 October 2003. Summary of changes for version 20031029:
14029 1) ACPI CA Core Subsystem:
14032 Fixed a problem where a level-triggered GPE with an associated
14033 _Lxx control method was incorrectly cleared twice.
14035 Fixed a problem with the Field support code where an access can
14036 occur beyond the end-of-region if the field is non-aligned but
14037 extends to the very end of the parent region (resulted in an
14038 AE_AML_REGION_LIMIT exception.)
14040 Fixed a problem with ACPI Fixed Events where an RT Clock handler
14041 would not get invoked on an RTC event. The RTC event bitmasks for
14042 the PM1 registers were not being initialized properly.
14044 Implemented support for executing _STA and _INI methods for
14045 Processor objects. Although this is currently not part of the
14046 ACPI specification, there is existing ASL code that depends on the
14047 init-time execution of these methods.
14049 Implemented and deployed a GetDescriptorName function to decode
14050 the various types of internal descriptors. Guards against null
14051 descriptors during debug output also.
14053 Implemented and deployed a GetNodeName function to extract the 4-
14054 character namespace node name. This function simplifies the debug
14055 and error output, as well as guarding against null pointers during
14058 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
14059 simplify the debug and error output of 64-bit integers. This
14060 macro replaces the HIDWORD and LODWORD macros for dumping these
14063 Updated the implementation of the Stall() operator to only call
14064 AcpiOsStall(), and also return an error if the operand is larger
14065 than 255. This preserves the required behavior of not
14066 relinquishing the processor, as would happen if AcpiOsSleep() was
14067 called for "long stalls".
14069 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
14070 initialized are now treated as NOOPs.
14072 Cleaned up a handful of warnings during 64-bit generation.
14074 Fixed a reported error where and incorrect GPE number was passed
14075 to the GPE dispatch handler. This value is only used for error
14076 output, however. Used this opportunity to clean up and streamline
14077 the GPE dispatch code.
14079 Code and Data Size: Current and previous core subsystem library
14080 sizes are shown below. These are the code and data sizes for the
14081 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14082 these values do not include any ACPI driver or OSPM code. The
14084 debug version of the code includes the debug output trace
14085 mechanism and has a much larger code and data size. Note that
14086 these values will vary depending on the efficiency of the compiler
14087 and the compiler options used during generation.
14089 Previous Release (20031002):
14090 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14091 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14093 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14094 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14097 2) iASL Compiler/Disassembler:
14099 Updated the iASL compiler to return an error if the operand to the
14100 Stall() operator is larger than 255.
14103 ----------------------------------------
14104 02 October 2003. Summary of changes for version 20031002:
14107 1) ACPI CA Core Subsystem:
14109 Fixed a problem with Index Fields where the index was not
14110 incremented for fields that require multiple writes to the
14111 index/data registers (Fields that are wider than the data
14114 Fixed a problem with all Field objects where a write could go
14115 beyond the end-of-field if the field was larger than the access
14116 granularity and therefore required multiple writes to complete the
14117 request. An extra write beyond the end of the field could happen
14120 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
14121 would incorrectly be returned if the width of the Data Register
14122 was larger than the specified field access width.
14124 Completed fixes for LoadTable() and Unload() and verified their
14125 operation. Implemented full support for the "DdbHandle" object
14126 throughout the ACPI CA subsystem.
14128 Implemented full support for the MADT and ECDT tables in the ACPI
14129 CA header files. Even though these tables are not directly
14130 consumed by ACPI CA, the header definitions are useful for ACPI
14133 Integrated resource descriptor fixes posted to the Linux ACPI
14134 list. This included checks for minimum descriptor length, and
14135 support for trailing NULL strings within descriptors that have
14136 optional string elements.
14138 Code and Data Size: Current and previous core subsystem library
14139 sizes are shown below. These are the code and data sizes for the
14140 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14141 these values do not include any ACPI driver or OSPM code. The
14142 debug version of the code includes the debug output trace
14143 mechanism and has a much larger code and data size. Note that
14144 these values will vary depending on the efficiency of the compiler
14145 and the compiler options used during generation.
14147 Previous Release (20030918):
14148 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14149 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14151 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14152 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14157 Implemented detection of non-ASCII characters within the input
14158 source ASL file. This catches attempts to compile binary (AML)
14159 files early in the compile, with an informative error message.
14161 Fixed a problem where the disassembler would fault if the output
14162 filename could not be generated or if the output file could not be
14165 ----------------------------------------
14166 18 September 2003. Summary of changes for version 20030918:
14169 1) ACPI CA Core Subsystem:
14171 Found and fixed a longstanding problem with the late execution of
14172 the various deferred AML opcodes (such as Operation Regions,
14173 Buffer Fields, Buffers, and Packages). If the name string
14174 specified for the name of the new object placed the object in a
14175 scope other than the current scope, the initialization/execution
14176 of the opcode failed. The solution to this problem was to
14177 implement a mechanism where the late execution of such opcodes
14178 does not attempt to lookup/create the name a second time in an
14179 incorrect scope. This fixes the "region size computed
14180 incorrectly" problem.
14182 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
14183 Global Lock AE_BAD_PARAMETER error.
14185 Fixed several 64-bit issues with prototypes, casting and data
14188 Removed duplicate prototype from acdisasm.h
14190 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
14192 Code and Data Size: Current and previous core subsystem library
14193 sizes are shown below. These are the code and data sizes for the
14194 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14195 these values do not include any ACPI driver or OSPM code. The
14196 debug version of the code includes the debug output trace
14197 mechanism and has a much larger code and data size. Note that
14198 these values will vary depending on the efficiency of the compiler
14199 and the compiler options used during generation.
14203 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14204 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14206 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14207 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14212 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
14213 correct sleep time in seconds.
14215 ----------------------------------------
14216 14 July 2003. Summary of changes for version 20030619:
14218 1) ACPI CA Core Subsystem:
14220 Parse SSDTs in order discovered, as opposed to reverse order
14223 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
14230 Dynamically allocate SDT list (suggested by Andi Kleen)
14232 proc function return value cleanups (Andi Kleen)
14234 Correctly handle NMI watchdog during long stalls (Andrew Morton)
14236 Make it so acpismp=force works (reported by Andrew Morton)
14239 ----------------------------------------
14240 19 June 2003. Summary of changes for version 20030619:
14242 1) ACPI CA Core Subsystem:
14244 Fix To/FromBCD, eliminating the need for an arch-specific #define.
14246 Do not acquire a semaphore in the S5 shutdown path.
14248 Fix ex_digits_needed for 0. (Takayoshi Kochi)
14250 Fix sleep/stall code reversal. (Andi Kleen)
14252 Revert a change having to do with control method calling
14257 acpiphp update (Takayoshi Kochi)
14259 Export acpi_disabled for sonypi (Stelian Pop)
14261 Mention acpismp=force in config help
14263 Re-add acpitable.c and acpismp=force. This improves backwards
14265 compatibility and also cleans up the code to a significant degree.
14267 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
14269 ----------------------------------------
14270 22 May 2003. Summary of changes for version 20030522:
14272 1) ACPI CA Core Subsystem:
14274 Found and fixed a reported problem where an AE_NOT_FOUND error
14275 occurred occasionally during _BST evaluation. This turned out to
14276 be an Owner ID allocation issue where a called method did not get
14277 a new ID assigned to it. Eventually, (after 64k calls), the Owner
14278 ID UINT16 would wraparound so that the ID would be the same as the
14279 caller's and the called method would delete the caller's
14282 Implemented extended error reporting for control methods that are
14283 aborted due to a run-time exception. Output includes the exact
14284 AML instruction that caused the method abort, a dump of the method
14285 locals and arguments at the time of the abort, and a trace of all
14286 nested control method calls.
14288 Modified the interpreter to allow the creation of buffers of zero
14289 length from the AML code. Implemented new code to ensure that no
14290 attempt is made to actually allocate a memory buffer (of length
14291 zero) - instead, a simple buffer object with a NULL buffer pointer
14292 and length zero is created. A warning is no longer issued when
14293 the AML attempts to create a zero-length buffer.
14295 Implemented a workaround for the "leading asterisk issue" in
14296 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
14297 asterisk is automatically removed if present in any HID, UID, or
14298 CID strings. The iASL compiler will still flag this asterisk as
14301 Implemented full support for _CID methods that return a package of
14302 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
14303 now additionally returns a device _CID list if present. This
14304 required a change to the external interface in order to pass an
14305 ACPI_BUFFER object as a parameter since the _CID list is of
14308 Fixed a problem with the new AE_SAME_HANDLER exception where
14309 handler initialization code did not know about this exception.
14311 Code and Data Size: Current and previous core subsystem library
14312 sizes are shown below. These are the code and data sizes for the
14313 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14314 these values do not include any ACPI driver or OSPM code. The
14315 debug version of the code includes the debug output trace
14316 mechanism and has a much larger code and data size. Note that
14317 these values will vary depending on the efficiency of the compiler
14318 and the compiler options used during generation.
14320 Previous Release (20030509):
14321 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14322 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14324 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14325 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14330 Fixed a bug in which we would reinitialize the ACPI interrupt
14331 after it was already working, thus disabling all ACPI and the IRQs
14332 for any other device sharing the interrupt. (Thanks to Stian
14335 Toshiba driver update (John Belmonte)
14337 Return only 0 or 1 for our interrupt handler status (Andrew
14343 Fixed a reported problem where multiple (nested) ElseIf()
14344 statements were not handled correctly by the compiler, resulting
14345 in incorrect warnings and incorrect AML code. This was a problem
14346 in both the ASL parser and the code generator.
14351 Added changes to existing interfaces, new exception codes, and new
14352 text concerning reference count object management versus garbage
14355 ----------------------------------------
14356 09 May 2003. Summary of changes for version 20030509.
14359 1) ACPI CA Core Subsystem:
14361 Changed the subsystem initialization sequence to hold off
14362 installation of address space handlers until the hardware has been
14363 initialized and the system has entered ACPI mode. This is because
14364 the installation of space handlers can cause _REG methods to be
14365 run. Previously, the _REG methods could potentially be run before
14366 ACPI mode was enabled.
14368 Fixed some memory leak issues related to address space handler and
14369 notify handler installation. There were some problems with the
14370 reference count mechanism caused by the fact that the handler
14371 objects are shared across several namespace objects.
14373 Fixed a reported problem where reference counts within the
14374 namespace were not properly updated when named objects created by
14375 method execution were deleted.
14377 Fixed a reported problem where multiple SSDTs caused a deletion
14378 issue during subsystem termination. Restructured the table data
14379 structures to simplify the linked lists and the related code.
14381 Fixed a problem where the table ID associated with secondary
14382 tables (SSDTs) was not being propagated into the namespace objects
14383 created by those tables. This would only present a problem for
14384 tables that are unloaded at run-time, however.
14386 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
14387 type as the length parameter (instead of UINT32).
14389 Solved a long-standing problem where an ALREADY_EXISTS error
14390 appears on various systems. This problem could happen when there
14391 are multiple PCI_Config operation regions under a single PCI root
14392 bus. This doesn't happen very frequently, but there are some
14393 systems that do this in the ASL.
14395 Fixed a reported problem where the internal DeleteNode function
14396 was incorrectly handling the case where a namespace node was the
14397 first in the parent's child list, and had additional peers (not
14398 the only child, but first in the list of children.)
14400 Code and Data Size: Current core subsystem library sizes are shown
14401 below. These are the code and data sizes for the acpica.lib
14402 produced by the Microsoft Visual C++ 6.0 compiler, and these
14403 values do not include any ACPI driver or OSPM code. The debug
14404 version of the code includes the debug output trace mechanism and
14405 has a much larger code and data size. Note that these values will
14406 vary depending on the efficiency of the compiler and the compiler
14407 options used during generation.
14410 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14411 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14413 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14414 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14419 Allow ":" in OS override string (Ducrot Bruno)
14421 Kobject fix (Greg KH)
14424 3 iASL Compiler/Disassembler:
14426 Fixed a problem in the generation of the C source code files (AML
14427 is emitted in C source statements for BIOS inclusion) where the
14428 Ascii dump that appears within a C comment at the end of each line
14429 could cause a compile time error if the AML sequence happens to
14430 have an open comment or close comment sequence embedded.
14433 ----------------------------------------
14434 24 April 2003. Summary of changes for version 20030424.
14437 1) ACPI CA Core Subsystem:
14439 Support for big-endian systems has been implemented. Most of the
14440 support has been invisibly added behind big-endian versions of the
14441 ACPI_MOVE_* macros.
14443 Fixed a problem in AcpiHwDisableGpeBlock() and
14444 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
14445 low level hardware write routine. The offset parameter was
14446 actually eliminated from the low level read/write routines because
14447 they had become obsolete.
14449 Fixed a problem where a handler object was deleted twice during
14450 the removal of a fixed event handler.
14455 A fix for SMP systems with link devices was contributed by
14459 (2.5) Return whether we handled the interrupt in our IRQ handler.
14460 (Linux ISRs no longer return void, so we can propagate the handler
14461 return value from the ACPI CA core back to the OS.)
14467 The ACPI CA Programmer Reference has been updated to reflect new
14468 interfaces and changes to existing interfaces.
14470 ----------------------------------------
14471 28 March 2003. Summary of changes for version 20030328.
14473 1) ACPI CA Core Subsystem:
14475 The GPE Block Device support has been completed. New interfaces
14476 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
14477 interfaces (enable, disable, clear, getstatus) have been split
14478 into separate interfaces for Fixed Events and General Purpose
14479 Events (GPEs) in order to support GPE Block Devices properly.
14481 Fixed a problem where the error message "Failed to acquire
14482 semaphore" would appear during operations on the embedded
14485 Code and Data Size: Current core subsystem library sizes are shown
14486 below. These are the code and data sizes for the acpica.lib
14487 produced by the Microsoft Visual C++ 6.0 compiler, and these
14488 values do not include any ACPI driver or OSPM code. The debug
14489 version of the code includes the debug output trace mechanism and
14490 has a much larger code and data size. Note that these values will
14491 vary depending on the efficiency of the compiler and the compiler
14492 options used during generation.
14495 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14496 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14498 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14499 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14502 ----------------------------------------
14503 28 February 2003. Summary of changes for version 20030228.
14506 1) ACPI CA Core Subsystem:
14508 The GPE handling and dispatch code has been completely overhauled
14509 in preparation for support of GPE Block Devices (ID ACPI0006).
14510 This affects internal data structures and code only; there should
14511 be no differences visible externally. One new file has been
14514 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
14515 fields that are used to determine the GPE block lengths. The
14516 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
14517 structures are ignored. This is per the ACPI specification but it
14518 isn't very clear. The full 256 Block 0/1 GPEs are now supported
14519 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
14521 In the SCI interrupt handler, removed the read of the PM1_CONTROL
14522 register to look at the SCI_EN bit. On some machines, this read
14523 causes an SMI event and greatly slows down SCI events. (This may
14524 in fact be the cause of slow battery status response on some
14527 Fixed a problem where a store of a NULL string to a package object
14528 could cause the premature deletion of the object. This was seen
14529 during execution of the battery _BIF method on some systems,
14530 resulting in no battery data being returned.
14532 Added AcpiWalkResources interface to simplify parsing of resource
14535 Code and Data Size: Current core subsystem library sizes are shown
14536 below. These are the code and data sizes for the acpica.lib
14537 produced by the Microsoft Visual C++ 6.0 compiler, and these
14538 values do not include any ACPI driver or OSPM code. The debug
14539 version of the code includes the debug output trace mechanism and
14540 has a much larger code and data size. Note that these values will
14541 vary depending on the efficiency of the compiler and the compiler
14542 options used during generation.
14545 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14546 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14548 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14549 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14554 S3 fixes (Ole Rohne)
14556 Update ACPI PHP driver with to use new acpi_walk_resource API
14559 Add S4BIOS support (Pavel Machek)
14561 Map in entire table before performing checksum (John Stultz)
14563 Expand the mem= cmdline to allow the specification of reserved and
14564 ACPI DATA blocks (Pavel Machek)
14566 Never use ACPI on VISWS
14568 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
14570 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
14571 causing us to think that some systems support C2 when they really
14574 Do not count processor objects for non-present CPUs (Thanks to
14580 Fixed a problem where ASL include files could not be found and
14583 Added support for the _PDC reserved name.
14586 ----------------------------------------
14587 22 January 2003. Summary of changes for version 20030122.
14590 1) ACPI CA Core Subsystem:
14592 Added a check for constructs of the form: Store (Local0, Local0)
14593 where Local0 is not initialized. Apparently, some BIOS
14594 programmers believe that this is a NOOP. Since this store doesn't
14595 do anything anyway, the new prototype behavior will ignore this
14596 error. This is a case where we can relax the strict checking in
14597 the interpreter in the name of compatibility.
14602 The AcpiSrc Source Conversion Utility has been released with the
14603 Linux package for the first time. This is the utility that is
14604 used to convert the ACPI CA base source code to the Linux version.
14606 (Both) Handle P_BLK lengths shorter than 6 more gracefully
14608 (Both) Move more headers to include/acpi, and delete an unused
14611 (Both) Move drivers/acpi/include directory to include/acpi
14613 (Both) Boot functions don't use cmdline, so don't pass it around
14615 (Both) Remove include of unused header (Adrian Bunk)
14617 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
14619 former now also includes the latter, acpiphp.h only needs the one,
14622 (2.5) Make it possible to select method of bios restoring after S3
14623 resume. [=> no more ugly ifdefs] (Pavel Machek)
14625 (2.5) Make proc write interfaces work (Pavel Machek)
14627 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
14629 (2.5) Break out ACPI Perf code into its own module, under cpufreq
14630 (Dominik Brodowski)
14632 (2.4) S4BIOS support (Ducrot Bruno)
14634 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
14640 Added support to disassemble SSDT and PSDTs.
14642 Implemented support to obtain SSDTs from the Windows registry if
14646 ----------------------------------------
14647 09 January 2003. Summary of changes for version 20030109.
14649 1) ACPI CA Core Subsystem:
14651 Changed the behavior of the internal Buffer-to-String conversion
14652 function. The current ACPI specification states that the contents
14653 of the buffer are "converted to a string of two-character
14654 hexadecimal numbers, each separated by a space". Unfortunately,
14655 this definition is not backwards compatible with existing ACPI 1.0
14656 implementations (although the behavior was not defined in the ACPI
14657 1.0 specification). The new behavior simply copies data from the
14658 buffer to the string until a null character is found or the end of
14659 the buffer is reached. The new String object is always null
14660 terminated. This problem was seen during the generation of _BIF
14661 battery data where incorrect strings were returned for battery
14662 type, etc. This will also require an errata to the ACPI
14665 Renamed all instances of NATIVE_UINT and NATIVE_INT to
14666 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
14668 Copyright in all module headers (both Linux and non-Linux) has be
14671 Code and Data Size: Current core subsystem library sizes are shown
14672 below. These are the code and data sizes for the acpica.lib
14673 produced by the Microsoft Visual C++ 6.0 compiler, and these
14674 values do not include any ACPI driver or OSPM code. The debug
14675 version of the code includes the debug output trace mechanism and
14676 has a much larger code and data size. Note that these values will
14677 vary depending on the efficiency of the compiler and the compiler
14678 options used during generation.
14681 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14682 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14684 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14685 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14690 Fixed an oops on module insertion/removal (Matthew Tippett)
14692 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
14694 (2.5) Replace pr_debug (Randy Dunlap)
14696 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
14698 (Both) Eliminate spawning of thread from timer callback, in favor
14701 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
14703 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
14705 (Both) Add missing statics to button.c (Pavel Machek)
14707 Several changes have been made to the source code translation
14708 utility that generates the Linux Code in order to make the code
14711 All typedefs on structs and unions have been removed in keeping
14712 with the Linux coding style.
14714 Removed the non-Linux SourceSafe module revision number from each
14717 Completed major overhaul of symbols to be lowercased for linux.
14718 Doubled the number of symbols that are lowercased.
14720 Fixed a problem where identifiers within procedure headers and
14721 within quotes were not fully lower cased (they were left with a
14724 Some C macros whose only purpose is to allow the generation of 16-
14725 bit code are now completely removed in the Linux code, increasing
14726 readability and maintainability.
14728 ----------------------------------------
14730 12 December 2002. Summary of changes for version 20021212.
14733 1) ACPI CA Core Subsystem:
14735 Fixed a problem where the creation of a zero-length AML Buffer
14736 would cause a fault.
14738 Fixed a problem where a Buffer object that pointed to a static AML
14739 buffer (in an ACPI table) could inadvertently be deleted, causing
14742 Fixed a problem where a user buffer (passed in to the external
14743 ACPI CA interfaces) could be overwritten if the buffer was too
14744 small to complete the operation, causing memory corruption.
14746 Fixed a problem in the Buffer-to-String conversion code where a
14747 string of length one was always returned, regardless of the size
14748 of the input Buffer object.
14750 Removed the NATIVE_CHAR data type across the entire source due to
14751 lack of need and lack of consistent use.
14753 Code and Data Size: Current core subsystem library sizes are shown
14754 below. These are the code and data sizes for the acpica.lib
14755 produced by the Microsoft Visual C++ 6.0 compiler, and these
14756 values do not include any ACPI driver or OSPM code. The debug
14757 version of the code includes the debug output trace mechanism and
14758 has a much larger code and data size. Note that these values will
14759 vary depending on the efficiency of the compiler and the compiler
14760 options used during generation.
14763 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
14764 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
14766 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14767 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14770 ----------------------------------------
14771 05 December 2002. Summary of changes for version 20021205.
14773 1) ACPI CA Core Subsystem:
14775 Fixed a problem where a store to a String or Buffer object could
14776 cause corruption of the DSDT if the object type being stored was
14777 the same as the target object type and the length of the object
14778 being stored was equal to or smaller than the original (existing)
14779 target object. This was seen to cause corruption of battery _BIF
14780 buffers if the _BIF method modified the buffer on the fly.
14782 Fixed a problem where an internal error was generated if a control
14783 method invocation was used in an OperationRegion, Buffer, or
14784 Package declaration. This was caused by the deferred parsing of
14785 the control method and thus the deferred creation of the internal
14786 method object. The solution to this problem was to create the
14787 internal method object at the moment the method is encountered in
14788 the first pass - so that subsequent references to the method will
14789 able to obtain the required parameter count and thus properly
14790 parse the method invocation. This problem presented itself as an
14791 AE_AML_INTERNAL during the pass 1 parse phase during table load.
14793 Fixed a problem where the internal String object copy routine did
14794 not always allocate sufficient memory for the target String object
14795 and caused memory corruption. This problem was seen to cause
14796 "Allocation already present in list!" errors as memory allocation
14799 Implemented a new function for the evaluation of namespace objects
14800 that allows the specification of the allowable return object
14801 types. This simplifies a lot of code that checks for a return
14802 object of one or more specific objects returned from the
14803 evaluation (such as _STA, etc.) This may become and external
14804 function if it would be useful to ACPI-related drivers.
14806 Completed another round of prefixing #defines with "ACPI_" for
14809 Completed additional code restructuring to allow more modular
14810 linking for iASL compiler and AcpiExec. Several files were split
14811 creating new files. New files: nsparse.c dsinit.c evgpe.c
14813 Implemented an abort mechanism to terminate an executing control
14814 method via the AML debugger. This feature is useful for debugging
14815 control methods that depend (wait) for specific hardware
14818 Code and Data Size: Current core subsystem library sizes are shown
14819 below. These are the code and data sizes for the acpica.lib
14820 produced by the Microsoft Visual C++ 6.0 compiler, and these
14821 values do not include any ACPI driver or OSPM code. The debug
14822 version of the code includes the debug output trace mechanism and
14823 has a much larger code and data size. Note that these values will
14824 vary depending on the efficiency of the compiler and the compiler
14825 options used during generation.
14828 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
14829 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
14831 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
14832 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
14835 2) iASL Compiler/Disassembler
14837 Fixed a compiler code generation problem for "Interrupt" Resource
14838 Descriptors. If specified in the ASL, the optional "Resource
14839 Source Index" and "Resource Source" fields were not inserted into
14840 the correct location within the AML resource descriptor, creating
14841 an invalid descriptor.
14843 Fixed a disassembler problem for "Interrupt" resource descriptors.
14844 The optional "Resource Source Index" and "Resource Source" fields
14848 ----------------------------------------
14849 22 November 2002. Summary of changes for version 20021122.
14852 1) ACPI CA Core Subsystem:
14854 Fixed a reported problem where an object stored to a Method Local
14855 or Arg was not copied to a new object during the store - the
14856 object pointer was simply copied to the Local/Arg. This caused
14857 all subsequent operations on the Local/Arg to also affect the
14858 original source of the store operation.
14860 Fixed a problem where a store operation to a Method Local or Arg
14861 was not completed properly if the Local/Arg contained a reference
14862 (from RefOf) to a named field. The general-purpose store-to-
14863 namespace-node code is now used so that this case is handled
14866 Fixed a problem where the internal object copy routine would cause
14867 a protection fault if the object being copied was a Package and
14868 contained either 1) a NULL package element or 2) a nested sub-
14871 Fixed a problem with the GPE initialization that resulted from an
14872 ambiguity in the ACPI specification. One section of the
14873 specification states that both the address and length of the GPE
14874 block must be zero if the block is not supported. Another section
14875 implies that only the address need be zero if the block is not
14876 supported. The code has been changed so that both the address and
14877 the length must be non-zero to indicate a valid GPE block (i.e.,
14878 if either the address or the length is zero, the GPE block is
14881 Code and Data Size: Current core subsystem library sizes are shown
14882 below. These are the code and data sizes for the acpica.lib
14883 produced by the Microsoft Visual C++ 6.0 compiler, and these
14884 values do not include any ACPI driver or OSPM code. The debug
14885 version of the code includes the debug output trace mechanism and
14886 has a much larger code and data size. Note that these values will
14887 vary depending on the efficiency of the compiler and the compiler
14888 options used during generation.
14891 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
14892 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
14894 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
14895 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
14900 Cleaned up EC driver. Exported an external EC read/write
14901 interface. By going through this, other drivers (most notably
14902 sonypi) will be able to serialize access to the EC.
14905 3) iASL Compiler/Disassembler
14907 Implemented support to optionally generate include files for both
14908 ASM and C (the -i switch). This simplifies BIOS development by
14909 automatically creating include files that contain external
14910 declarations for the symbols that are created within the
14912 (optionally generated) ASM and C AML source files.
14915 ----------------------------------------
14916 15 November 2002. Summary of changes for version 20021115.
14918 1) ACPI CA Core Subsystem:
14920 Fixed a memory leak problem where an error during resolution of
14922 method arguments during a method invocation from another method
14923 failed to cleanup properly by deleting all successfully resolved
14926 Fixed a problem where the target of the Index() operator was not
14927 correctly constructed if the source object was a package. This
14928 problem has not been detected because the use of a target operand
14929 with Index() is very rare.
14931 Fixed a problem with the Index() operator where an attempt was
14932 made to delete the operand objects twice.
14934 Fixed a problem where an attempt was made to delete an operand
14935 twice during execution of the CondRefOf() operator if the target
14938 Implemented the first of perhaps several internal create object
14939 functions that create and initialize a specific object type. This
14940 consolidates duplicated code wherever the object is created, thus
14941 shrinking the size of the subsystem.
14943 Implemented improved debug/error messages for errors that occur
14944 during nested method invocations. All executing method pathnames
14945 are displayed (with the error) as the call stack is unwound - thus
14948 Fixed a problem introduced in the 10/02 release that caused
14949 premature deletion of a buffer object if a buffer was used as an
14950 ASL operand where an integer operand is required (Thus causing an
14951 implicit object conversion from Buffer to Integer.) The change in
14952 the 10/02 release was attempting to fix a memory leak (albeit
14955 Code and Data Size: Current core subsystem library sizes are shown
14956 below. These are the code and data sizes for the acpica.lib
14957 produced by the Microsoft Visual C++ 6.0 compiler, and these
14958 values do not include any ACPI driver or OSPM code. The debug
14959 version of the code includes the debug output trace mechanism and
14960 has a much larger code and data size. Note that these values will
14961 vary depending on the efficiency of the compiler and the compiler
14962 options used during generation.
14965 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
14966 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
14968 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
14969 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
14974 Changed the implementation of the ACPI semaphores to use down()
14975 instead of down_interruptable(). It is important that the
14976 execution of ACPI control methods not be interrupted by signals.
14977 Methods must run to completion, or the system may be left in an
14978 unknown/unstable state.
14980 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
14984 3) iASL Compiler/Disassembler
14987 Changed the default location of output files. All output files
14988 are now placed in the current directory by default instead of in
14989 the directory of the source file. This change may affect some
14990 existing makefiles, but it brings the behavior of the compiler in
14991 line with other similar tools. The location of the output files
14992 can be overridden with the -p command line switch.
14995 ----------------------------------------
14996 11 November 2002. Summary of changes for version 20021111.
14999 0) ACPI Specification 2.0B is released and is now available at:
15000 http://www.acpi.info/index.html
15003 1) ACPI CA Core Subsystem:
15005 Implemented support for the ACPI 2.0 SMBus Operation Regions.
15006 This includes the early detection and handoff of the request to
15007 the SMBus region handler (avoiding all of the complex field
15008 support code), and support for the bidirectional return packet
15009 from an SMBus write operation. This paves the way for the
15010 development of SMBus drivers in each host operating system.
15012 Fixed a problem where the semaphore WAIT_FOREVER constant was
15013 defined as 32 bits, but must be 16 bits according to the ACPI
15014 specification. This had the side effect of causing ASL
15015 Mutex/Event timeouts even though the ASL code requested a wait
15016 forever. Changed all internal references to the ACPI timeout
15017 parameter to 16 bits to prevent future problems. Changed the name
15018 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
15020 Code and Data Size: Current core subsystem library sizes are shown
15021 below. These are the code and data sizes for the acpica.lib
15022 produced by the Microsoft Visual C++ 6.0 compiler, and these
15023 values do not include any ACPI driver or OSPM code. The debug
15024 version of the code includes the debug output trace mechanism and
15025 has a much larger code and data size. Note that these values will
15026 vary depending on the efficiency of the compiler and the compiler
15027 options used during generation.
15030 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15031 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15033 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15034 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15039 Module loading/unloading fixes (John Cagle)
15042 3) iASL Compiler/Disassembler
15044 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
15046 Implemented support for the disassembly of all SMBus protocol
15047 keywords (SMBQuick, SMBWord, etc.)
15049 ----------------------------------------
15050 01 November 2002. Summary of changes for version 20021101.
15053 1) ACPI CA Core Subsystem:
15055 Fixed a problem where platforms that have a GPE1 block but no GPE0
15056 block were not handled correctly. This resulted in a "GPE
15057 overlap" error message. GPE0 is no longer required.
15059 Removed code added in the previous release that inserted nodes
15060 into the namespace in alphabetical order. This caused some side-
15061 effects on various machines. The root cause of the problem is
15062 still under investigation since in theory, the internal ordering
15063 of the namespace nodes should not matter.
15066 Enhanced error reporting for the case where a named object is not
15067 found during control method execution. The full ACPI namepath
15068 (name reference) of the object that was not found is displayed in
15071 Note: as a result of the overhaul of the namespace object types in
15072 the previous release, the namespace nodes for the predefined
15073 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
15074 instead of ACPI_TYPE_ANY. This simplifies the namespace
15075 management code but may affect code that walks the namespace tree
15076 looking for specific object types.
15078 Code and Data Size: Current core subsystem library sizes are shown
15079 below. These are the code and data sizes for the acpica.lib
15080 produced by the Microsoft Visual C++ 6.0 compiler, and these
15081 values do not include any ACPI driver or OSPM code. The debug
15082 version of the code includes the debug output trace mechanism and
15083 has a much larger code and data size. Note that these values will
15084 vary depending on the efficiency of the compiler and the compiler
15085 options used during generation.
15088 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15089 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15091 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15092 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15097 Fixed a problem introduced in the previous release where the
15098 Processor and Thermal objects were not recognized and installed in
15099 /proc. This was related to the scope type change described above.
15102 3) iASL Compiler/Disassembler
15104 Implemented the -g option to get all of the required ACPI tables
15105 from the registry and save them to files (Windows version of the
15106 compiler only.) The required tables are the FADT, FACS, and DSDT.
15108 Added ACPI table checksum validation during table disassembly in
15109 order to catch corrupted tables.
15112 ----------------------------------------
15113 22 October 2002. Summary of changes for version 20021022.
15115 1) ACPI CA Core Subsystem:
15117 Implemented a restriction on the Scope operator that the target
15118 must already exist in the namespace at the time the operator is
15119 encountered (during table load or method execution). In other
15120 words, forward references are not allowed and Scope() cannot
15121 create a new object. This changes the previous behavior where the
15122 interpreter would create the name if not found. This new behavior
15123 correctly enables the search-to-root algorithm during namespace
15124 lookup of the target name. Because of this upsearch, this fixes
15125 the known Compaq _SB_.OKEC problem and makes both the AML
15126 interpreter and iASL compiler compatible with other ACPI
15129 Completed a major overhaul of the internal ACPI object types for
15130 the ACPI Namespace and the associated operand objects. Many of
15131 these types had become obsolete with the introduction of the two-
15132 pass namespace load. This cleanup simplifies the code and makes
15133 the entire namespace load mechanism much clearer and easier to
15136 Improved debug output for tracking scope opening/closing to help
15137 diagnose scoping issues. The old scope name as well as the new
15138 scope name are displayed. Also improved error messages for
15139 problems with ASL Mutex objects and error messages for GPE
15142 Cleaned up the namespace dump code, removed obsolete code.
15144 All string output (for all namespace/object dumps) now uses the
15145 common ACPI string output procedure which handles escapes properly
15146 and does not emit non-printable characters.
15148 Fixed some issues with constants in the 64-bit version of the
15149 local C library (utclib.c)
15154 EC Driver: No longer attempts to acquire the Global Lock at
15158 3) iASL Compiler/Disassembler
15160 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
15161 2 opcodes outside of a control method. This means that the
15162 "executable" operators (versus the "namespace" operators) cannot
15163 be used at the table level; they can only be used within a control
15166 Implemented the restriction on the Scope() operator where the
15167 target must already exist in the namespace at the time the
15168 operator is encountered (during ASL compilation). In other words,
15169 forward references are not allowed and Scope() cannot create a new
15170 object. This makes the iASL compiler compatible with other ACPI
15171 implementations and makes the Scope() implementation adhere to the
15172 ACPI specification.
15174 Fixed a problem where namepath optimization for the Alias operator
15175 was optimizing the wrong path (of the two namepaths.) This caused
15176 a "Missing alias link" error message.
15178 Fixed a problem where an "unknown reserved name" warning could be
15179 incorrectly generated for names like "_SB" when the trailing
15180 underscore is not used in the original ASL.
15182 Fixed a problem where the reserved name check did not handle
15183 NamePaths with multiple NameSegs correctly. The first nameseg of
15184 the NamePath was examined instead of the last NameSeg.
15187 ----------------------------------------
15189 02 October 2002. Summary of changes for this release.
15192 1) ACPI CA Core Subsystem version 20021002:
15194 Fixed a problem where a store/copy of a string to an existing
15195 string did not always set the string length properly in the String
15198 Fixed a reported problem with the ToString operator where the
15199 behavior was identical to the ToHexString operator instead of just
15200 simply converting a raw buffer to a string data type.
15202 Fixed a problem where CopyObject and the other "explicit"
15203 conversion operators were not updating the internal namespace node
15204 type as part of the store operation.
15206 Fixed a memory leak during implicit source operand conversion
15207 where the original object was not deleted if it was converted to a
15208 new object of a different type.
15210 Enhanced error messages for all problems associated with namespace
15211 lookups. Common procedure generates and prints the lookup name as
15212 well as the formatted status.
15214 Completed implementation of a new design for the Alias support
15215 within the namespace. The existing design did not handle the case
15216 where a new object was assigned to one of the two names due to the
15217 use of an explicit conversion operator, resulting in the two names
15218 pointing to two different objects. The new design simply points
15219 the Alias name to the original name node - not to the object.
15220 This results in a level of indirection that must be handled in the
15221 name resolution mechanism.
15223 Code and Data Size: Current core subsystem library sizes are shown
15224 below. These are the code and data sizes for the acpica.lib
15225 produced by the Microsoft Visual C++ 6.0 compiler, and these
15226 values do not include any ACPI driver or OSPM code. The debug
15227 version of the code includes the debug output trace mechanism and
15228 has a larger code and data size. Note that these values will vary
15229 depending on the efficiency of the compiler and the compiler
15230 options used during generation.
15233 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15234 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15236 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15237 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15242 Initialize thermal driver's timer before it is used. (Knut
15245 Allow handling negative celsius values. (Kochi Takayoshi)
15247 Fix thermal management and make trip points. R/W (Pavel Machek)
15249 Fix /proc/acpi/sleep. (P. Christeas)
15251 IA64 fixes. (David Mosberger)
15253 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
15255 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
15259 3) iASL Compiler/Disassembler
15261 Clarified some warning/error messages.
15264 ----------------------------------------
15265 18 September 2002. Summary of changes for this release.
15268 1) ACPI CA Core Subsystem version 20020918:
15270 Fixed a reported problem with reference chaining (via the Index()
15271 and RefOf() operators) in the ObjectType() and SizeOf() operators.
15272 The definition of these operators includes the dereferencing of
15273 all chained references to return information on the base object.
15275 Fixed a problem with stores to indexed package elements - the
15276 existing code would not complete the store if an "implicit
15277 conversion" was not performed. In other words, if the existing
15278 object (package element) was to be replaced completely, the code
15279 didn't handle this case.
15281 Relaxed typechecking on the ASL "Scope" operator to allow the
15282 target name to refer to an object of type Integer, String, or
15283 Buffer, in addition to the scoping object types (Device,
15284 predefined Scopes, Processor, PowerResource, and ThermalZone.)
15285 This allows existing AML code that has workarounds for a bug in
15286 Windows to function properly. A warning is issued, however. This
15287 affects both the AML interpreter and the iASL compiler. Below is
15288 an example of this type of ASL code:
15294 Fixed some reported problems with 64-bit integer support in the
15295 local implementation of C library functions (clib.c)
15300 Use ACPI fix map region instead of IOAPIC region, since it is
15301 undefined in non-SMP.
15303 Ensure that the SCI has the proper polarity and trigger, even on
15304 systems that do not have an interrupt override entry in the MADT.
15306 2.5 big driver reorganization (Pat Mochel)
15308 Use early table mapping code from acpitable.c (Andi Kleen)
15310 New blacklist entries (Andi Kleen)
15312 Blacklist improvements. Split blacklist code out into a separate
15313 file. Move checking the blacklist to very early. Previously, we
15314 would use ACPI tables, and then halfway through init, check the
15315 blacklist -- too late. Now, it's early enough to completely fall-
15319 3) iASL Compiler/Disassembler version 20020918:
15321 Fixed a problem where the typechecking code didn't know that an
15322 alias could point to a method. In other words, aliases were not
15323 being dereferenced during typechecking.
15326 ----------------------------------------
15327 29 August 2002. Summary of changes for this release.
15329 1) ACPI CA Core Subsystem Version 20020829:
15331 If the target of a Scope() operator already exists, it must be an
15332 object type that actually opens a scope -- such as a Device,
15333 Method, Scope, etc. This is a fatal runtime error. Similar error
15334 check has been added to the iASL compiler also.
15336 Tightened up the namespace load to disallow multiple names in the
15337 same scope. This previously was allowed if both objects were of
15338 the same type. (i.e., a lookup was the same as entering a new
15344 Ensure that the ACPI interrupt has the proper trigger and
15347 local_irq_disable is extraneous. (Matthew Wilcox)
15349 Make "acpi=off" actually do what it says, and not use the ACPI
15350 interpreter *or* the tables.
15352 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
15356 3) iASL Compiler/Disassembler Version 20020829:
15358 Implemented namepath optimization for name declarations. For
15359 example, a declaration like "Method (\_SB_.ABCD)" would get
15360 optimized to "Method (ABCD)" if the declaration is within the
15361 \_SB_ scope. This optimization is in addition to the named
15362 reference path optimization first released in the previous
15363 version. This would seem to complete all possible optimizations
15364 for namepaths within the ASL/AML.
15366 If the target of a Scope() operator already exists, it must be an
15367 object type that actually opens a scope -- such as a Device,
15368 Method, Scope, etc.
15370 Implemented a check and warning for unreachable code in the same
15371 block below a Return() statement.
15373 Fixed a problem where the listing file was not generated if the
15374 compiler aborted if the maximum error count was exceeded (200).
15376 Fixed a problem where the typechecking of method return values was
15377 broken. This includes the check for a return value when the
15378 method is invoked as a TermArg (a return value is expected.)
15380 Fixed a reported problem where EOF conditions during a quoted
15381 string or comment caused a fault.
15384 ----------------------------------------
15385 15 August 2002. Summary of changes for this release.
15387 1) ACPI CA Core Subsystem Version 20020815:
15389 Fixed a reported problem where a Store to a method argument that
15390 contains a reference did not perform the indirect store correctly.
15391 This problem was created during the conversion to the new
15392 reference object model - the indirect store to a method argument
15393 code was not updated to reflect the new model.
15395 Reworked the ACPI mode change code to better conform to ACPI 2.0,
15396 handle corner cases, and improve code legibility (Kochi Takayoshi)
15398 Fixed a problem with the pathname parsing for the carat (^)
15399 prefix. The heavy use of the carat operator by the new namepath
15400 optimization in the iASL compiler uncovered a problem with the AML
15401 interpreter handling of this prefix. In the case where one or
15402 more carats precede a single nameseg, the nameseg was treated as
15403 standalone and the search rule (to root) was inadvertently
15404 applied. This could cause both the iASL compiler and the
15405 interpreter to find the wrong object or to miss the error that
15406 should occur if the object does not exist at that exact pathname.
15408 Found and fixed the problem where the HP Pavilion DSDT would not
15409 load. This was a relatively minor tweak to the table loading code
15410 (a problem caused by the unexpected encounter with a method
15411 invocation not within a control method), but it does not solve the
15412 overall issue of the execution of AML code at the table level.
15413 This investigation is still ongoing.
15415 Code and Data Size: Current core subsystem library sizes are shown
15416 below. These are the code and data sizes for the acpica.lib
15417 produced by the Microsoft Visual C++ 6.0 compiler, and these
15418 values do not include any ACPI driver or OSPM code. The debug
15419 version of the code includes the debug output trace mechanism and
15420 has a larger code and data size. Note that these values will vary
15421 depending on the efficiency of the compiler and the compiler
15422 options used during generation.
15425 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15426 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15428 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15429 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15434 Remove redundant slab.h include (Brad Hards)
15436 Fix several bugs in thermal.c (Herbert Nachtnebel)
15438 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
15440 Change acpi_system_suspend to use updated irq functions (Pavel
15443 Export acpi_get_firmware_table (Matthew Wilcox)
15445 Use proper root proc entry for ACPI (Kochi Takayoshi)
15447 Fix early-boot table parsing (Bjorn Helgaas)
15450 3) iASL Compiler/Disassembler
15452 Reworked the compiler options to make them more consistent and to
15453 use two-letter options where appropriate. We were running out of
15454 sensible letters. This may break some makefiles, so check the
15455 current options list by invoking the compiler with no parameters.
15457 Completed the design and implementation of the ASL namepath
15458 optimization option for the compiler. This option optimizes all
15459 references to named objects to the shortest possible path. The
15460 first attempt tries to utilize a single nameseg (4 characters) and
15461 the "search-to-root" algorithm used by the interpreter. If that
15462 cannot be used (because either the name is not in the search path
15463 or there is a conflict with another object with the same name),
15464 the pathname is optimized using the carat prefix (usually a
15465 shorter string than specifying the entire path from the root.)
15467 Implemented support to obtain the DSDT from the Windows registry
15468 (when the disassembly option is specified with no input file).
15469 Added this code as the implementation for AcpiOsTableOverride in
15470 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
15471 utility) to scan memory for the DSDT to the AcpiOsTableOverride
15472 function in the DOS OSL to make the disassembler truly OS
15475 Implemented a new option to disassemble and compile in one step.
15476 When used without an input filename, this option will grab the
15477 DSDT from the local machine, disassemble it, and compile it in one
15480 Added a warning message for invalid escapes (a backslash followed
15481 by any character other than the allowable escapes). This catches
15482 the quoted string error "\_SB_" (which should be "\\_SB_" ).
15484 Also, there are numerous instances in the ACPI specification where
15487 Added a compiler option to disable all optimizations. This is
15488 basically the "compatibility mode" because by using this option,
15489 the AML code will come out exactly the same as other ASL
15492 Added error messages for incorrectly ordered dependent resource
15493 functions. This includes: missing EndDependentFn macro at end of
15494 dependent resource list, nested dependent function macros (both
15495 start and end), and missing StartDependentFn macro. These are
15496 common errors that should be caught at compile time.
15498 Implemented _OSI support for the disassembler and compiler. _OSI
15499 must be included in the namespace for proper disassembly (because
15500 the disassembler must know the number of arguments.)
15502 Added an "optimization" message type that is optional (off by
15503 default). This message is used for all optimizations - including
15504 constant folding, integer optimization, and namepath optimization.
15506 ----------------------------------------
15507 25 July 2002. Summary of changes for this release.
15510 1) ACPI CA Core Subsystem Version 20020725:
15512 The AML Disassembler has been enhanced to produce compilable ASL
15513 code and has been integrated into the iASL compiler (see below) as
15514 well as the single-step disassembly for the AML debugger and the
15515 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
15516 resource templates and macros are fully supported. The
15517 disassembler has been tested on over 30 different AML files,
15518 producing identical AML when the resulting disassembled ASL file
15519 is recompiled with the same ASL compiler.
15521 Modified the Resource Manager to allow zero interrupts and zero
15522 dma channels during the GetCurrentResources call. This was
15523 causing problems on some platforms.
15525 Added the AcpiOsRedirectOutput interface to the OSL to simplify
15526 output redirection for the AcpiOsPrintf and AcpiOsVprintf
15529 Code and Data Size: Current core subsystem library sizes are shown
15530 below. These are the code and data sizes for the acpica.lib
15531 produced by the Microsoft Visual C++ 6.0 compiler, and these
15532 values do not include any ACPI driver or OSPM code. The debug
15533 version of the code includes the debug output trace mechanism and
15534 has a larger code and data size. Note that these values will vary
15535 depending on the efficiency of the compiler and the compiler
15536 options used during generation.
15539 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15540 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15542 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15543 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15548 Fixed a panic in the EC driver (Dominik Brodowski)
15550 Implemented checksum of the R/XSDT itself during Linux table scan
15556 The AML disassembler is integrated into the compiler. The "-d"
15557 option invokes the disassembler to completely disassemble an
15558 input AML file, producing as output a text ASL file with the
15559 extension ".dsl" (to avoid name collisions with existing .asl
15560 source files.) A future enhancement will allow the disassembler
15561 to obtain the BIOS DSDT from the registry under Windows.
15563 Fixed a problem with the VendorShort and VendorLong resource
15564 descriptors where an invalid AML sequence was created.
15566 Implemented a fix for BufferData term in the ASL parser. It was
15567 inadvertently defined twice, allowing invalid syntax to pass and
15568 causing reduction conflicts.
15570 Fixed a problem where the Ones opcode could get converted to a
15571 value of zero if "Ones" was used where a byte, word or dword value
15572 was expected. The 64-bit value is now truncated to the correct
15573 size with the correct value.
15577 ----------------------------------------
15578 02 July 2002. Summary of changes for this release.
15581 1) ACPI CA Core Subsystem Version 20020702:
15583 The Table Manager code has been restructured to add several new
15584 features. Tables that are not required by the core subsystem
15585 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
15586 validated in any way and are returned from AcpiGetFirmwareTable if
15587 requested. The AcpiOsTableOverride interface is now called for
15588 each table that is loaded by the subsystem in order to allow the
15589 host to override any table it chooses. Previously, only the DSDT
15590 could be overridden. Added one new files, tbrsdt.c and
15593 Fixed a problem with the conversion of internal package objects to
15594 external objects (when a package is returned from a control
15595 method.) The return buffer length was set to zero instead of the
15596 proper length of the package object.
15598 Fixed a reported problem with the use of the RefOf and DeRefOf
15599 operators when passing reference arguments to control methods. A
15600 new type of Reference object is used internally for references
15601 produced by the RefOf operator.
15603 Added additional error messages in the Resource Manager to explain
15604 AE_BAD_DATA errors when they occur during resource parsing.
15606 Split the AcpiEnableSubsystem into two primitives to enable a
15607 finer granularity initialization sequence. These two calls should
15608 be called in this order: AcpiEnableSubsystem (flags),
15609 AcpiInitializeObjects (flags). The flags parameter remains the
15615 Updated the ACPI utilities module to understand the new style of
15616 fully resolved package objects that are now returned from the core
15617 subsystem. This eliminates errors of the form:
15619 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
15620 acpi_utils-0430 [145] acpi_evaluate_reference:
15621 Invalid element in package (not a device reference)
15623 The method evaluation utility uses the new buffer allocation
15624 scheme instead of calling AcpiEvaluate Object twice.
15626 Added support for ECDT. This allows the use of the Embedded
15628 Controller before the namespace has been fully initialized, which
15629 is necessary for ACPI 2.0 support, and for some laptops to
15630 initialize properly. (Laptops using ECDT are still rare, so only
15631 limited testing was performed of the added functionality.)
15633 Fixed memory leaks in the EC driver.
15635 Eliminated a brittle code structure in acpi_bus_init().
15637 Eliminated the acpi_evaluate() helper function in utils.c. It is
15638 no longer needed since acpi_evaluate_object can optionally
15639 allocate memory for the return object.
15641 Implemented fix for keyboard hang when getting battery readings on
15642 some systems (Stephen White)
15644 PCI IRQ routing update (Dominik Brodowski)
15646 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
15649 ----------------------------------------
15650 11 June 2002. Summary of changes for this release.
15653 1) ACPI CA Core Subsystem Version 20020611:
15655 Fixed a reported problem where constants such as Zero and One
15656 appearing within _PRT packages were not handled correctly within
15657 the resource manager code. Originally reported against the ASL
15658 compiler because the code generator now optimizes integers to
15659 their minimal AML representation (i.e. AML constants if possible.)
15660 The _PRT code now handles all AML constant opcodes correctly
15661 (Zero, One, Ones, Revision).
15663 Fixed a problem with the Concatenate operator in the AML
15664 interpreter where a buffer result object was incorrectly marked as
15665 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
15667 All package sub-objects are now fully resolved before they are
15668 returned from the external ACPI interfaces. This means that name
15669 strings are resolved to object handles, and constant operators
15670 (Zero, One, Ones, Revision) are resolved to Integers.
15672 Implemented immediate resolution of the AML Constant opcodes
15673 (Zero, One, Ones, Revision) to Integer objects upon detection
15674 within the AML stream. This has simplified and reduced the
15675 generated code size of the subsystem by eliminating about 10
15676 switch statements for these constants (which previously were
15677 contained in Reference objects.) The complicating issues are that
15678 the Zero opcode is used as a "placeholder" for unspecified
15679 optional target operands and stores to constants are defined to be
15682 Code and Data Size: Current core subsystem library sizes are shown
15683 below. These are the code and data sizes for the acpica.lib
15684 produced by the Microsoft Visual C++ 6.0 compiler, and these
15685 values do not include any ACPI driver or OSPM code. The debug
15686 version of the code includes the debug output trace mechanism and
15687 has a larger code and data size. Note that these values will vary
15688 depending on the efficiency of the compiler and the compiler
15689 options used during generation.
15692 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
15693 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
15695 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15696 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15702 Added preliminary support for obtaining _TRA data for PCI root
15703 bridges (Bjorn Helgaas).
15706 3) iASL Compiler Version X2046:
15708 Fixed a problem where the "_DDN" reserved name was defined to be a
15709 control method with one argument. There are no arguments, and
15710 _DDN does not have to be a control method.
15712 Fixed a problem with the Linux version of the compiler where the
15713 source lines printed with error messages were the wrong lines.
15714 This turned out to be the "LF versus CR/LF" difference between
15715 Windows and Unix. This appears to be the longstanding issue
15716 concerning listing output and error messages.
15718 Fixed a problem with the Linux version of compiler where opcode
15719 names within error messages were wrong. This was caused by a
15720 slight difference in the output of the Flex tool on Linux versus
15723 Fixed a problem with the Linux compiler where the hex output files
15724 contained some garbage data caused by an internal buffer overrun.
15727 ----------------------------------------
15728 17 May 2002. Summary of changes for this release.
15731 1) ACPI CA Core Subsystem Version 20020517:
15733 Implemented a workaround to an BIOS bug discovered on the HP
15734 OmniBook where the FADT revision number and the table size are
15735 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
15736 behavior is to fallback to using only the ACPI 1.0 fields of the
15737 FADT if the table is too small to be a ACPI 2.0 table as claimed
15738 by the revision number. Although this is a BIOS bug, this is a
15739 case where the workaround is simple enough and with no side
15740 effects, so it seemed prudent to add it. A warning message is
15743 Implemented minimum size checks for the fixed-length ACPI tables -
15744 - the FADT and FACS, as well as consistency checks between the
15745 revision number and the table size.
15747 Fixed a reported problem in the table override support where the
15748 new table pointer was incorrectly treated as a physical address
15749 instead of a logical address.
15751 Eliminated the use of the AE_AML_ERROR exception and replaced it
15752 with more descriptive codes.
15754 Fixed a problem where an exception would occur if an ASL Field was
15755 defined with no named Field Units underneath it (used by some
15758 Code and Data Size: Current core subsystem library sizes are shown
15759 below. These are the code and data sizes for the acpica.lib
15760 produced by the Microsoft Visual C++ 6.0 compiler, and these
15761 values do not include any ACPI driver or OSPM code. The debug
15762 version of the code includes the debug output trace mechanism and
15763 has a larger code and data size. Note that these values will vary
15764 depending on the efficiency of the compiler and the compiler
15765 options used during generation.
15768 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
15769 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
15771 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
15772 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
15778 Much work done on ACPI init (MADT and PCI IRQ routing support).
15779 (Paul D. and Dominik Brodowski)
15781 Fix PCI IRQ-related panic on boot (Sam Revitch)
15783 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
15785 Fix "MHz" typo (Dominik Brodowski)
15787 Fix RTC year 2000 issue (Dominik Brodowski)
15789 Preclude multiple button proc entries (Eric Brunet)
15791 Moved arch-specific code out of include/platform/aclinux.h
15793 3) iASL Compiler Version X2044:
15795 Implemented error checking for the string used in the EISAID macro
15796 (Usually used in the definition of the _HID object.) The code now
15797 strictly enforces the PnP format - exactly 7 characters, 3
15798 uppercase letters and 4 hex digits.
15800 If a raw string is used in the definition of the _HID object
15801 (instead of the EISAID macro), the string must contain all
15802 alphanumeric characters (e.g., "*PNP0011" is not allowed because
15805 Implemented checking for invalid use of ACPI reserved names for
15806 most of the name creation operators (Name, Device, Event, Mutex,
15807 OperationRegion, PowerResource, Processor, and ThermalZone.)
15808 Previously, this check was only performed for control methods.
15810 Implemented an additional check on the Name operator to emit an
15811 error if a reserved name that must be implemented in ASL as a
15812 control method is used. We know that a reserved name must be a
15813 method if it is defined with input arguments.
15815 The warning emitted when a namespace object reference is not found
15816 during the cross reference phase has been changed into an error.
15817 The "External" directive should be used for names defined in other
15821 4) Tools and Utilities
15823 The 16-bit tools (adump16 and aexec16) have been regenerated and
15826 Fixed a problem with the output of both acpidump and adump16 where
15827 the indentation of closing parentheses and brackets was not
15829 aligned properly with the parent block.
15832 ----------------------------------------
15833 03 May 2002. Summary of changes for this release.
15836 1) ACPI CA Core Subsystem Version 20020503:
15838 Added support a new OSL interface that allows the host operating
15840 system software to override the DSDT found in the firmware -
15841 AcpiOsTableOverride. With this interface, the OSL can examine the
15842 version of the firmware DSDT and replace it with a different one
15845 Added new external interfaces for accessing ACPI registers from
15846 device drivers and other system software - AcpiGetRegister and
15847 AcpiSetRegister. This was simply an externalization of the
15848 existing AcpiHwBitRegister interfaces.
15850 Fixed a regression introduced in the previous build where the
15851 ASL/AML CreateField operator always returned an error,
15852 "destination must be a NS Node".
15854 Extended the maximum time (before failure) to successfully enable
15855 ACPI mode to 3 seconds.
15857 Code and Data Size: Current core subsystem library sizes are shown
15858 below. These are the code and data sizes for the acpica.lib
15859 produced by the Microsoft Visual C++ 6.0 compiler, and these
15860 values do not include any ACPI driver or OSPM code. The debug
15861 version of the code includes the debug output trace mechanism and
15862 has a larger code and data size. Note that these values will vary
15863 depending on the efficiency of the compiler and the compiler
15864 options used during generation.
15867 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
15868 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
15870 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
15871 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
15876 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
15877 free. While 3 out of 4 of our in-house systems work fine, the last
15878 one still hangs when testing the LAPIC timer.
15880 Renamed many files in 2.5 kernel release to omit "acpi_" from the
15883 Added warning on boot for Presario 711FR.
15885 Sleep improvements (Pavel Machek)
15887 ACPI can now be built without CONFIG_PCI enabled.
15889 IA64: Fixed memory map functions (JI Lee)
15892 3) iASL Compiler Version X2043:
15894 Added support to allow the compiler to be integrated into the MS
15895 VC++ development environment for one-button compilation of single
15896 files or entire projects -- with error-to-source-line mapping.
15898 Implemented support for compile-time constant folding for the
15899 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
15900 specification. This allows the ASL writer to use expressions
15901 instead of Integer/Buffer/String constants in terms that must
15902 evaluate to constants at compile time and will also simplify the
15903 emitted AML in any such sub-expressions that can be folded
15904 (evaluated at compile-time.) This increases the size of the
15905 compiler significantly because a portion of the ACPI CA AML
15906 interpreter is included within the compiler in order to pre-
15907 evaluate constant expressions.
15910 Fixed a problem with the "Unicode" ASL macro that caused the
15911 compiler to fault. (This macro is used in conjunction with the
15912 _STR reserved name.)
15914 Implemented an AML opcode optimization to use the Zero, One, and
15915 Ones opcodes where possible to further reduce the size of integer
15916 constants and thus reduce the overall size of the generated AML
15919 Implemented error checking for new reserved terms for ACPI version
15922 Implemented the -qr option to display the current list of ACPI
15923 reserved names known to the compiler.
15925 Implemented the -qc option to display the current list of ASL
15926 operators that are allowed within constant expressions and can
15927 therefore be folded at compile time if the operands are constants.
15932 Updated the Programmer's Reference for new interfaces, data types,
15933 and memory allocation model options.
15935 Updated the iASL Compiler User Reference to apply new format and
15936 add information about new features and options.
15938 ----------------------------------------
15939 19 April 2002. Summary of changes for this release.
15941 1) ACPI CA Core Subsystem Version 20020419:
15943 The source code base for the Core Subsystem has been completely
15944 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
15945 versions. The Lint option files used are included in the
15946 /acpi/generate/lint directory.
15948 Implemented enhanced status/error checking across the entire
15949 Hardware manager subsystem. Any hardware errors (reported from
15950 the OSL) are now bubbled up and will abort a running control
15954 Fixed a problem where the per-ACPI-table integer width (32 or 64)
15955 was stored only with control method nodes, causing a fault when
15956 non-control method code was executed during table loading. The
15957 solution implemented uses a global variable to indicate table
15958 width across the entire ACPI subsystem. Therefore, ACPI CA does
15959 not support mixed integer widths across different ACPI tables
15962 Fixed a problem where NULL extended fields (X fields) in an ACPI
15963 2.0 ACPI FADT caused the table load to fail. Although the
15964 existing ACPI specification is a bit fuzzy on this topic, the new
15965 behavior is to fall back on a ACPI 1.0 field if the corresponding
15966 ACPI 2.0 X field is zero (even though the table revision indicates
15967 a full ACPI 2.0 table.) The ACPI specification will be updated to
15968 clarify this issue.
15970 Fixed a problem with the SystemMemory operation region handler
15971 where memory was always accessed byte-wise even if the AML-
15972 specified access width was larger than a byte. This caused
15973 problems on systems with memory-mapped I/O. Memory is now
15974 accessed with the width specified. On systems that do not support
15975 non-aligned transfers, a check is made to guarantee proper address
15976 alignment before proceeding in order to avoid an AML-caused
15977 alignment fault within the kernel.
15980 Fixed a problem with the ExtendedIrq resource where only one byte
15981 of the 4-byte Irq field was extracted.
15983 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
15984 function was out of date and required a rewrite.
15986 Code and Data Size: Current core subsystem library sizes are shown
15987 below. These are the code and data sizes for the acpica.lib
15988 produced by the Microsoft Visual C++ 6.0 compiler, and these
15989 values do not include any ACPI driver or OSPM code. The debug
15990 version of the code includes the debug output trace mechanism and
15991 has a larger code and data size. Note that these values will vary
15992 depending on the efficiency of the compiler and the compiler
15993 options used during generation.
15996 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
15997 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
15999 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16000 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16005 PCI IRQ routing fixes (Dominik Brodowski)
16008 3) iASL Compiler Version X2042:
16010 Implemented an additional compile-time error check for a field
16011 unit whose size + minimum access width would cause a run-time
16012 access beyond the end-of-region. Previously, only the field size
16013 itself was checked.
16015 The Core subsystem and iASL compiler now share a common parse
16016 object in preparation for compile-time evaluation of the type
16017 3/4/5 ASL operators.
16020 ----------------------------------------
16021 Summary of changes for this release: 03_29_02
16023 1) ACPI CA Core Subsystem Version 20020329:
16025 Implemented support for late evaluation of TermArg operands to
16026 Buffer and Package objects. This allows complex expressions to be
16027 used in the declarations of these object types.
16029 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
16030 1.0, if the field was larger than 32 bits, it was returned as a
16031 buffer - otherwise it was returned as an integer. In ACPI 2.0,
16032 the field is returned as a buffer only if the field is larger than
16033 64 bits. The TableRevision is now considered when making this
16034 conversion to avoid incompatibility with existing ASL code.
16036 Implemented logical addressing for AcpiOsGetRootPointer. This
16037 allows an RSDP with either a logical or physical address. With
16038 this support, the host OS can now override all ACPI tables with
16039 one logical RSDP. Includes implementation of "typed" pointer
16040 support to allow a common data type for both physical and logical
16041 pointers internally. This required a change to the
16042 AcpiOsGetRootPointer interface.
16044 Implemented the use of ACPI 2.0 Generic Address Structures for all
16045 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
16046 mapped I/O for these ACPI features.
16048 Initialization now ignores not only non-required tables (All
16049 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
16050 not validate the table headers of unrecognized tables.
16052 Fixed a problem where a notify handler could only be
16053 installed/removed on an object of type Device. All "notify"
16055 objects are now supported -- Devices, Processor, Power, and
16058 Removed most verbosity from the ACPI_DB_INFO debug level. Only
16059 critical information is returned when this debug level is enabled.
16061 Code and Data Size: Current core subsystem library sizes are shown
16062 below. These are the code and data sizes for the acpica.lib
16063 produced by the Microsoft Visual C++ 6.0 compiler, and these
16064 values do not include any ACPI driver or OSPM code. The debug
16065 version of the code includes the debug output trace mechanism and
16066 has a larger code and data size. Note that these values will vary
16067 depending on the efficiency of the compiler and the compiler
16068 options used during generation.
16071 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16072 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16074 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16075 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16080 The processor driver (acpi_processor.c) now fully supports ACPI
16081 2.0-based processor performance control (e.g. Intel(R)
16082 SpeedStep(TM) technology) Note that older laptops that only have
16083 the Intel "applet" interface are not supported through this. The
16084 'limit' and 'performance' interface (/proc) are fully functional.
16085 [Note that basic policy for controlling performance state
16086 transitions will be included in the next version of ospmd.] The
16087 idle handler was modified to more aggressively use C2, and PIIX4
16088 errata handling underwent a complete overhaul (big thanks to
16089 Dominik Brodowski).
16091 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
16092 based devices in the ACPI namespace are now dynamically bound
16093 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
16094 This allows, among other things, ACPI to resolve bus numbers for
16095 subordinate PCI bridges.
16097 Enhanced PCI IRQ routing to get the proper bus number for _PRT
16098 entries defined underneath PCI bridges.
16100 Added IBM 600E to bad bios list due to invalid _ADR value for
16101 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
16103 In the process of adding full MADT support (e.g. IOAPIC) for IA32
16104 (acpi.c, mpparse.c) -- stay tuned.
16106 Added back visual differentiation between fixed-feature and
16107 control-method buttons in dmesg. Buttons are also subtyped (e.g.
16108 button/power/PWRF) to simplify button identification.
16110 We no longer use -Wno-unused when compiling debug. Please ignore
16111 any "_THIS_MODULE defined but not used" messages.
16113 Can now shut down the system using "magic sysrq" key.
16116 3) iASL Compiler version 2041:
16118 Fixed a problem where conversion errors for hex/octal/decimal
16119 constants were not reported.
16121 Implemented a fix for the General Register template Address field.
16122 This field was 8 bits when it should be 64.
16124 Fixed a problem where errors/warnings were no longer being emitted
16125 within the listing output file.
16127 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
16128 exactly 4 characters, alphanumeric only.
16133 ----------------------------------------
16134 Summary of changes for this release: 03_08_02
16137 1) ACPI CA Core Subsystem Version 20020308:
16139 Fixed a problem with AML Fields where the use of the "AccessAny"
16140 keyword could cause an interpreter error due to attempting to read
16141 or write beyond the end of the parent Operation Region.
16143 Fixed a problem in the SystemMemory Operation Region handler where
16144 an attempt was made to map memory beyond the end of the region.
16145 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
16146 errors on some Linux systems.
16148 Fixed a problem where the interpreter/namespace "search to root"
16149 algorithm was not functioning for some object types. Relaxed the
16150 internal restriction on the search to allow upsearches for all
16151 external object types as well as most internal types.
16156 We now use safe_halt() macro versus individual calls to sti | hlt.
16158 Writing to the processor limit interface should now work. "echo 1"
16159 will increase the limit, 2 will decrease, and 0 will reset to the
16166 Fixed segfault on Linux version.
16169 ----------------------------------------
16170 Summary of changes for this release: 02_25_02
16172 1) ACPI CA Core Subsystem:
16175 Fixed a problem where the GPE bit masks were not initialized
16176 properly, causing erratic GPE behavior.
16178 Implemented limited support for multiple calling conventions. The
16179 code can be generated with either the VPL (variable parameter
16180 list, or "C") convention, or the FPL (fixed parameter list, or
16181 "Pascal") convention. The core subsystem is about 3.4% smaller
16182 when generated with FPL.
16187 Re-add some /proc/acpi/event functionality that was lost during
16190 Resolved issue with /proc events for fixed-feature buttons showing
16191 up as the system device.
16193 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
16195 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
16197 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
16199 Fixed limit interface & usage to fix bugs with passive cooling
16202 Restructured PRT support.
16205 ----------------------------------------
16206 Summary of changes for this label: 02_14_02
16209 1) ACPI CA Core Subsystem:
16211 Implemented support in AcpiLoadTable to allow loading of FACS and
16214 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
16215 been removed. All 64-bit platforms should be migrated to the ACPI
16216 2.0 tables. The actbl71.h header has been removed from the source
16219 All C macros defined within the subsystem have been prefixed with
16220 "ACPI_" to avoid collision with other system include files.
16222 Removed the return value for the two AcpiOsPrint interfaces, since
16223 it is never used and causes lint warnings for ignoring the return
16226 Added error checking to all internal mutex acquire and release
16227 calls. Although a failure from one of these interfaces is
16228 probably a fatal system error, these checks will cause the
16229 immediate abort of the currently executing method or interface.
16231 Fixed a problem where the AcpiSetCurrentResources interface could
16232 fault. This was a side effect of the deployment of the new memory
16235 Fixed a couple of problems with the Global Lock support introduced
16236 in the last major build. The "common" (1.0/2.0) internal FACS was
16237 being overwritten with the FACS signature and clobbering the
16238 Global Lock pointer. Also, the actual firmware FACS was being
16239 unmapped after construction of the "common" FACS, preventing
16240 access to the actual Global Lock field within it. The "common"
16241 internal FACS is no longer installed as an actual ACPI table; it
16242 is used simply as a global.
16244 Code and Data Size: Current core subsystem library sizes are shown
16245 below. These are the code and data sizes for the acpica.lib
16246 produced by the Microsoft Visual C++ 6.0 compiler, and these
16247 values do not include any ACPI driver or OSPM code. The debug
16248 version of the code includes the debug output trace mechanism and
16249 has a larger code and data size. Note that these values will vary
16250 depending on the efficiency of the compiler and the compiler
16251 options used during generation.
16253 Previous Release (02_07_01)
16254 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16255 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16257 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16258 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16263 Updated Linux-specific code for core macro and OSL interface
16264 changes described above.
16266 Improved /proc/acpi/event. It now can be opened only once and has
16267 proper poll functionality.
16269 Fixed and restructured power management (acpi_bus).
16271 Only create /proc "view by type" when devices of that class exist.
16273 Fixed "charging/discharging" bug (and others) in acpi_battery.
16275 Improved thermal zone code.
16278 3) ASL Compiler, version X2039:
16281 Implemented the new compiler restriction on ASL String hex/octal
16282 escapes to non-null, ASCII values. An error results if an invalid
16283 value is used. (This will require an ACPI 2.0 specification
16286 AML object labels that are output to the optional C and ASM source
16287 are now prefixed with both the ACPI table signature and table ID
16288 to help guarantee uniqueness within a large BIOS project.
16291 ----------------------------------------
16292 Summary of changes for this label: 02_01_02
16294 1) ACPI CA Core Subsystem:
16296 ACPI 2.0 support is complete in the entire Core Subsystem and the
16297 ASL compiler. All new ACPI 2.0 operators are implemented and all
16298 other changes for ACPI 2.0 support are complete. With
16299 simultaneous code and data optimizations throughout the subsystem,
16300 ACPI 2.0 support has been implemented with almost no additional
16301 cost in terms of code and data size.
16303 Implemented a new mechanism for allocation of return buffers. If
16304 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
16305 be allocated on behalf of the caller. Consolidated all return
16306 buffer validation and allocation to a common procedure. Return
16307 buffers will be allocated via the primary OSL allocation interface
16308 since it appears that a separate pool is not needed by most users.
16309 If a separate pool is required for these buffers, the caller can
16310 still use the original mechanism and pre-allocate the buffer(s).
16312 Implemented support for string operands within the DerefOf
16315 Restructured the Hardware and Event managers to be table driven,
16316 simplifying the source code and reducing the amount of generated
16319 Split the common read/write low-level ACPI register bitfield
16320 procedure into a separate read and write, simplifying the code
16323 Obsoleted the AcpiOsCallocate OSL interface. This interface was
16324 used only a handful of times and didn't have enough critical mass
16325 for a separate interface. Replaced with a common calloc procedure
16328 Fixed a reported problem with the GPE number mapping mechanism
16329 that allows GPE1 numbers to be non-contiguous with GPE0.
16330 Reorganized the GPE information and shrunk a large array that was
16331 originally large enough to hold info for all possible GPEs (256)
16332 to simply large enough to hold all GPEs up to the largest GPE
16333 number on the machine.
16335 Fixed a reported problem with resource structure alignment on 64-
16338 Changed the AcpiEnableEvent and AcpiDisableEvent external
16339 interfaces to not require any flags for the common case of
16340 enabling/disabling a GPE.
16342 Implemented support to allow a "Notify" on a Processor object.
16344 Most TBDs in comments within the source code have been resolved
16348 Fixed a problem in the interpreter where a standalone parent
16349 prefix (^) was not handled correctly in the interpreter and
16352 Removed obsolete and unnecessary GPE save/restore code.
16354 Implemented Field support in the ASL Load operator. This allows a
16355 table to be loaded from a named field, in addition to loading a
16356 table directly from an Operation Region.
16358 Implemented timeout and handle support in the external Global Lock
16361 Fixed a problem in the AcpiDump utility where pathnames were no
16362 longer being generated correctly during the dump of named objects.
16364 Modified the AML debugger to give a full display of if/while
16365 predicates instead of just one AML opcode at a time. (The
16366 predicate can have several nested ASL statements.) The old method
16367 was confusing during single stepping.
16369 Code and Data Size: Current core subsystem library sizes are shown
16370 below. These are the code and data sizes for the acpica.lib
16371 produced by the Microsoft Visual C++ 6.0 compiler, and these
16372 values do not include any ACPI driver or OSPM code. The debug
16373 version of the code includes the debug output trace mechanism and
16374 has a larger code and data size. Note that these values will vary
16375 depending on the efficiency of the compiler and the compiler
16376 options used during generation.
16378 Previous Release (12_18_01)
16379 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16380 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16382 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16383 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16387 Implemented fix for PIIX reverse throttling errata (Processor
16390 Added new Limit interface (Processor and Thermal drivers)
16392 New thermal policy (Thermal driver)
16394 Many updates to /proc
16396 Battery "low" event support (Battery driver)
16398 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
16400 IA32 - IA64 initialization unification, no longer experimental
16402 Menuconfig options redesigned
16404 3) ASL Compiler, version X2037:
16406 Implemented several new output features to simplify integration of
16407 AML code into firmware: 1) Output the AML in C source code with
16408 labels for each named ASL object. The original ASL source code
16409 is interleaved as C comments. 2) Output the AML in ASM source code
16410 with labels and interleaved ASL source. 3) Output the AML in
16411 raw hex table form, in either C or ASM.
16413 Implemented support for optional string parameters to the
16414 LoadTable operator.
16416 Completed support for embedded escape sequences within string
16417 literals. The compiler now supports all single character escapes
16418 as well as the Octal and Hex escapes. Note: the insertion of a
16419 null byte into a string literal (via the hex/octal escape) causes
16420 the string to be immediately terminated. A warning is issued.
16422 Fixed a problem where incorrect AML was generated for the case
16423 where an ASL namepath consists of a single parent prefix (
16425 ) with no trailing name segments.
16427 The compiler has been successfully generated with a 64-bit C
16433 ----------------------------------------
16434 Summary of changes for this label: 12_18_01
16438 Enhanced blacklist with reason and severity fields. Any table's
16439 signature may now be used to identify a blacklisted system.
16441 Call _PIC control method to inform the firmware which interrupt
16442 model the OS is using. Turn on any disabled link devices.
16444 Cleaned up busmgr /proc error handling (Andreas Dilger)
16446 2) ACPI CA Core Subsystem:
16448 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
16451 Completed implementation of the ACPI 2.0 "Continue",
16452 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
16453 operators. All new ACPI 2.0 operators are now implemented in both
16454 the ASL compiler and the AML interpreter. The only remaining ACPI
16455 2.0 task is support for the String data type in the DerefOf
16456 operator. Fixed a problem with AcquireMutex where the status code
16457 was lost if the caller had to actually wait for the mutex.
16459 Increased the maximum ASL Field size from 64K bits to 4G bits.
16461 Completed implementation of the external Global Lock interfaces --
16462 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
16463 Handler parameters were added.
16465 Completed another pass at removing warnings and issues when
16466 compiling with 64-bit compilers. The code now compiles cleanly
16467 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
16468 add and subtract (diff) macros have changed considerably.
16471 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
16472 64-bit platforms, 32-bits on all others. This type is used
16473 wherever memory allocation and/or the C sizeof() operator is used,
16474 and affects the OSL memory allocation interfaces AcpiOsAllocate
16475 and AcpiOsCallocate.
16477 Implemented sticky user breakpoints in the AML debugger.
16479 Code and Data Size: Current core subsystem library sizes are shown
16480 below. These are the code and data sizes for the acpica.lib
16481 produced by the Microsoft Visual C++ 6.0 compiler, and these
16482 values do not include any ACPI driver or OSPM code. The debug
16483 version of the code includes the debug output trace mechanism and
16484 has a larger code and data size. Note that these values will vary
16485 depending on the efficiency of the compiler and the compiler
16486 options used during generation.
16488 Previous Release (12_05_01)
16489 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16490 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16492 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16493 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16495 3) ASL Compiler, version X2034:
16497 Now checks for (and generates an error if detected) the use of a
16498 Break or Continue statement without an enclosing While statement.
16501 Successfully generated the compiler with the Intel 64-bit C
16504 ----------------------------------------
16505 Summary of changes for this label: 12_05_01
16507 1) ACPI CA Core Subsystem:
16509 The ACPI 2.0 CopyObject operator is fully implemented. This
16510 operator creates a new copy of an object (and is also used to
16511 bypass the "implicit conversion" mechanism of the Store operator.)
16513 The ACPI 2.0 semantics for the SizeOf operator are fully
16514 implemented. The change is that performing a SizeOf on a
16515 reference object causes an automatic dereference of the object to
16516 tha actual value before the size is evaluated. This behavior was
16517 undefined in ACPI 1.0.
16519 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
16520 have been implemented. The interrupt polarity and mode are now
16523 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
16524 appearing in Package objects were not properly converted to
16525 integers when the internal Package was converted to an external
16526 object (via the AcpiEvaluateObject interface.)
16528 Fixed a problem with the namespace object deletion mechanism for
16529 objects created by control methods. There were two parts to this
16530 problem: 1) Objects created during the initialization phase method
16531 parse were not being deleted, and 2) The object owner ID mechanism
16532 to track objects was broken.
16534 Fixed a problem where the use of the ASL Scope operator within a
16535 control method would result in an invalid opcode exception.
16537 Fixed a problem introduced in the previous label where the buffer
16538 length required for the _PRT structure was not being returned
16541 Code and Data Size: Current core subsystem library sizes are shown
16542 below. These are the code and data sizes for the acpica.lib
16543 produced by the Microsoft Visual C++ 6.0 compiler, and these
16544 values do not include any ACPI driver or OSPM code. The debug
16545 version of the code includes the debug output trace mechanism and
16546 has a larger code and data size. Note that these values will vary
16547 depending on the efficiency of the compiler and the compiler
16548 options used during generation.
16550 Previous Release (11_20_01)
16551 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16552 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16555 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16556 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16560 Updated all files to apply cleanly against 2.4.16.
16562 Added basic PCI Interrupt Routing Table (PRT) support for IA32
16563 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
16564 version supports both static and dyanmic PRT entries, but dynamic
16565 entries are treated as if they were static (not yet
16566 reconfigurable). Architecture- specific code to use this data is
16567 absent on IA32 but should be available shortly.
16569 Changed the initialization sequence to start the ACPI interpreter
16570 (acpi_init) prior to initialization of the PCI driver (pci_init)
16571 in init/main.c. This ordering is required to support PRT and
16572 facilitate other (future) enhancement. A side effect is that the
16573 ACPI bus driver and certain device drivers can no longer be loaded
16576 Modified the 'make menuconfig' options to allow PCI Interrupt
16577 Routing support to be included without the ACPI Bus and other
16580 3) ASL Compiler, version X2033:
16582 Fixed some issues with the use of the new CopyObject and
16583 DataTableRegion operators. Both are fully functional.
16585 ----------------------------------------
16586 Summary of changes for this label: 11_20_01
16588 20 November 2001. Summary of changes for this release.
16590 1) ACPI CA Core Subsystem:
16592 Updated Index support to match ACPI 2.0 semantics. Storing a
16593 Integer, String, or Buffer to an Index of a Buffer will store only
16594 the least-significant byte of the source to the Indexed buffer
16595 byte. Multiple writes are not performed.
16597 Fixed a problem where the access type used in an AccessAs ASL
16598 operator was not recorded correctly into the field object.
16600 Fixed a problem where ASL Event objects were created in a
16601 signalled state. Events are now created in an unsignalled state.
16603 The internal object cache is now purged after table loading and
16604 initialization to reduce the use of dynamic kernel memory -- on
16605 the assumption that object use is greatest during the parse phase
16606 of the entire table (versus the run-time use of individual control
16609 ACPI 2.0 variable-length packages are now fully operational.
16611 Code and Data Size: Code and Data optimizations have permitted new
16612 feature development with an actual reduction in the library size.
16613 Current core subsystem library sizes are shown below. These are
16614 the code and data sizes for the acpica.lib produced by the
16615 Microsoft Visual C++ 6.0 compiler, and these values do not include
16616 any ACPI driver or OSPM code. The debug version of the code
16617 includes the debug output trace mechanism and has a larger code
16618 and data size. Note that these values will vary depending on the
16619 efficiency of the compiler and the compiler options used during
16622 Previous Release (11_09_01):
16623 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
16624 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
16627 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16628 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16632 Enhanced the ACPI boot-time initialization code to allow the use
16633 of Local APIC tables for processor enumeration on IA-32, and to
16634 pave the way for a fully MPS-free boot (on SMP systems) in the
16635 near future. This functionality replaces
16636 arch/i386/kernel/acpitables.c, which was introduced in an earlier
16637 2.4.15-preX release. To enable this feature you must add
16638 "acpi_boot=on" to the kernel command line -- see the help entry
16639 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
16642 Restructured the configuration options to allow boot-time table
16643 parsing support without inclusion of the ACPI Interpreter (and
16646 NOTE: This release does not include fixes for the reported events,
16647 power-down, and thermal passive cooling issues (coming soon).
16651 Added additional typechecking for Fields within restricted access
16652 Operation Regions. All fields within EC and CMOS regions must be
16653 declared with ByteAcc. All fields withing SMBus regions must be
16654 declared with the BufferAcc access type.
16656 Fixed a problem where the listing file output of control methods
16657 no longer interleaved the actual AML code with the ASL source
16663 ----------------------------------------
16664 Summary of changes for this label: 11_09_01
16666 1) ACPI CA Core Subsystem:
16668 Implemented ACPI 2.0-defined support for writes to fields with a
16669 Buffer, String, or Integer source operand that is smaller than the
16670 target field. In these cases, the source operand is zero-extended
16671 to fill the target field.
16673 Fixed a problem where a Field starting bit offset (within the
16674 parent operation region) was calculated incorrectly if the
16676 alignment of the field differed from the access width. This
16677 affected CreateWordField, CreateDwordField, CreateQwordField, and
16678 possibly other fields that use the "AccessAny" keyword.
16680 Fixed a problem introduced in the 11_02_01 release where indirect
16681 stores through method arguments did not operate correctly.
16685 Implemented boot-time ACPI table parsing support
16686 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
16687 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
16688 legacy BIOS interfaces (e.g. MPS) for the configuration of system
16689 processors, memory, and interrupts during setup_arch(). Note that
16690 this patch does not include the required architecture-specific
16691 changes required to apply this information -- subsequent patches
16692 will be posted for both IA32 and IA64 to achieve this.
16694 Added low-level sleep support for IA32 platforms, courtesy of Pat
16695 Mochel. This allows IA32 systems to transition to/from various
16696 sleeping states (e.g. S1, S3), although the lack of a centralized
16697 driver model and power-manageable drivers will prevent its
16698 (successful) use on most systems.
16700 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
16701 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
16702 tables" option, etc.
16704 Increased the default timeout for the EC driver from 1ms to 10ms
16705 (1000 cycles of 10us) to try to address AE_TIME errors during EC
16708 ----------------------------------------
16709 Summary of changes for this label: 11_02_01
16711 1) ACPI CA Core Subsystem:
16713 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
16714 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
16717 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
16718 changes to support ACPI 2.0 Qword field access. Read/Write
16719 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
16720 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
16721 the value parameter for the address space handler interface is now
16722 an ACPI_INTEGER. OSL implementations of these interfaces must now
16723 handle the case where the Width parameter is 64.
16725 Index Fields: Fixed a problem where unaligned bit assembly and
16726 disassembly for IndexFields was not supported correctly.
16728 Index and Bank Fields: Nested Index and Bank Fields are now
16729 supported. During field access, a check is performed to ensure
16730 that the value written to an Index or Bank register is not out of
16731 the range of the register. The Index (or Bank) register is
16732 written before each access to the field data. Future support will
16733 include allowing individual IndexFields to be wider than the
16734 DataRegister width.
16736 Fields: Fixed a problem where the AML interpreter was incorrectly
16737 attempting to write beyond the end of a Field/OpRegion. This was
16738 a boundary case that occurred when a DWORD field was written to a
16739 BYTE access OpRegion, forcing multiple writes and causing the
16740 interpreter to write one datum too many.
16742 Fields: Fixed a problem with Field/OpRegion access where the
16743 starting bit address of a field was incorrectly calculated if the
16744 current access type was wider than a byte (WordAcc, DwordAcc, or
16747 Fields: Fixed a problem where forward references to individual
16748 FieldUnits (individual Field names within a Field definition) were
16749 not resolved during the AML table load.
16751 Fields: Fixed a problem where forward references from a Field
16752 definition to the parent Operation Region definition were not
16753 resolved during the AML table load.
16755 Fields: Duplicate FieldUnit names within a scope are now detected
16756 during AML table load.
16758 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
16759 returned an incorrect name for the root node.
16761 Code and Data Size: Code and Data optimizations have permitted new
16762 feature development with an actual reduction in the library size.
16763 Current core subsystem library sizes are shown below. These are
16764 the code and data sizes for the acpica.lib produced by the
16765 Microsoft Visual C++ 6.0 compiler, and these values do not include
16766 any ACPI driver or OSPM code. The debug version of the code
16767 includes the debug output trace mechanism and has a larger code
16768 and data size. Note that these values will vary depending on the
16769 efficiency of the compiler and the compiler options used during
16772 Previous Release (10_18_01):
16773 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
16774 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
16777 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
16778 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
16782 Improved /proc processor output (Pavel Machek) Re-added
16783 MODULE_LICENSE("GPL") to all modules.
16785 3) ASL Compiler version X2030:
16787 Duplicate FieldUnit names within a scope are now detected and
16792 Programmer Reference updated to reflect OSL and address space
16793 handler interface changes described above.
16795 ----------------------------------------
16796 Summary of changes for this label: 10_18_01
16798 ACPI CA Core Subsystem:
16800 Fixed a problem with the internal object reference count mechanism
16801 that occasionally caused premature object deletion. This resolves
16802 all of the outstanding problem reports where an object is deleted
16803 in the middle of an interpreter evaluation. Although this problem
16804 only showed up in rather obscure cases, the solution to the
16805 problem involved an adjustment of all reference counts involving
16806 objects attached to namespace nodes.
16808 Fixed a problem with Field support in the interpreter where
16809 writing to an aligned field whose length is an exact multiple (2
16810 or greater) of the field access granularity would cause an attempt
16811 to write beyond the end of the field.
16813 The top level AML opcode execution functions within the
16814 interpreter have been renamed with a more meaningful and
16815 consistent naming convention. The modules exmonad.c and
16816 exdyadic.c were eliminated. New modules are exoparg1.c,
16817 exoparg2.c, exoparg3.c, and exoparg6.c.
16819 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
16821 Fixed a problem where the AML debugger was causing some internal
16822 objects to not be deleted during subsystem termination.
16824 Fixed a problem with the external AcpiEvaluateObject interface
16825 where the subsystem would fault if the named object to be
16826 evaluated refered to a constant such as Zero, Ones, etc.
16828 Fixed a problem with IndexFields and BankFields where the
16829 subsystem would fault if the index, data, or bank registers were
16830 not defined in the same scope as the field itself.
16832 Added printf format string checking for compilers that support
16833 this feature. Corrected more than 50 instances of issues with
16834 format specifiers within invocations of ACPI_DEBUG_PRINT
16835 throughout the core subsystem code.
16837 The ASL "Revision" operator now returns the ACPI support level
16838 implemented in the core - the value "2" since the ACPI 2.0 support
16839 is more than 50% implemented.
16841 Enhanced the output of the AML debugger "dump namespace" command
16842 to output in a more human-readable form.
16844 Current core subsystem library code sizes are shown below. These
16846 are the code and data sizes for the acpica.lib produced by the
16847 Microsoft Visual C++ 6.0 compiler, and these values do not include
16848 any ACPI driver or OSPM code. The debug version of the code
16849 includes the full debug trace mechanism -- leading to a much
16851 larger code and data size. Note that these values will vary
16852 depending on the efficiency of the compiler and the compiler
16853 options used during generation.
16855 Previous Label (09_20_01):
16856 Non-Debug Version: 65K Code, 5K Data, 70K Total
16857 Debug Version: 138K Code, 58K Data, 196K Total
16861 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
16862 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
16866 Implemented a "Bad BIOS Blacklist" to track machines that have
16867 known ASL/AML problems.
16869 Enhanced the /proc interface for the thermal zone driver and added
16870 support for _HOT (the critical suspend trip point). The 'info'
16871 file now includes threshold/policy information, and allows setting
16872 of _SCP (cooling preference) and _TZP (polling frequency) values
16873 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
16874 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
16875 preference to the passive/quiet mode (if supported by the ASL).
16877 Implemented a workaround for a gcc bug that resuted in an OOPs
16878 when loading the control method battery driver.
16880 ----------------------------------------
16881 Summary of changes for this label: 09_20_01
16883 ACPI CA Core Subsystem:
16885 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
16886 modified to allow individual GPE levels to be flagged as wake-
16887 enabled (i.e., these GPEs are to remain enabled when the platform
16890 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
16891 support wake-enabled GPEs. This means that upon entering the
16892 sleep state, all GPEs that are not wake-enabled are disabled.
16893 When leaving the sleep state, these GPEs are reenabled.
16895 A local double-precision divide/modulo module has been added to
16896 enhance portability to OS kernels where a 64-bit math library is
16897 not available. The new module is "utmath.c".
16899 Several optimizations have been made to reduce the use of CPU
16900 stack. Originally over 2K, the maximum stack usage is now below
16901 2K at 1860 bytes (1.82k)
16903 Fixed a problem with the AcpiGetFirmwareTable interface where the
16904 root table pointer was not mapped into a logical address properly.
16906 Fixed a problem where a NULL pointer was being dereferenced in the
16907 interpreter code for the ASL Notify operator.
16909 Fixed a problem where the use of the ASL Revision operator
16910 returned an error. This operator now returns the current version
16911 of the ACPI CA core subsystem.
16913 Fixed a problem where objects passed as control method parameters
16914 to AcpiEvaluateObject were always deleted at method termination.
16915 However, these objects may end up being stored into the namespace
16916 by the called method. The object reference count mechanism was
16917 applied to these objects instead of a force delete.
16919 Fixed a problem where static strings or buffers (contained in the
16920 AML code) that are declared as package elements within the ASL
16921 code could cause a fault because the interpreter would attempt to
16922 delete them. These objects are now marked with the "static
16923 object" flag to prevent any attempt to delete them.
16925 Implemented an interpreter optimization to use operands directly
16926 from the state object instead of extracting the operands to local
16927 variables. This reduces stack use and code size, and improves
16930 The module exxface.c was eliminated as it was an unnecessary extra
16933 Current core subsystem library code sizes are shown below. These
16934 are the code and data sizes for the acpica.lib produced by the
16935 Microsoft Visual C++ 6.0 compiler, and these values do not include
16936 any ACPI driver or OSPM code. The debug version of the code
16937 includes the full debug trace mechanism -- leading to a much
16938 larger code and data size. Note that these values will vary
16939 depending on the efficiency of the compiler and the compiler
16940 options used during generation.
16942 Non-Debug Version: 65K Code, 5K Data, 70K Total
16943 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
16944 Total (Previously 195K)
16948 Support for ACPI 2.0 64-bit integers has been added. All ACPI
16949 Integer objects are now 64 bits wide
16951 All Acpi data types and structures are now in lower case. Only
16952 Acpi macros are upper case for differentiation.
16956 Changes to the external interfaces as described above.
16958 ----------------------------------------
16959 Summary of changes for this label: 08_31_01
16961 ACPI CA Core Subsystem:
16963 A bug with interpreter implementation of the ASL Divide operator
16964 was found and fixed. The implicit function return value (not the
16965 explicit store operands) was returning the remainder instead of
16966 the quotient. This was a longstanding bug and it fixes several
16967 known outstanding issues on various platforms.
16969 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
16970 been further optimized for size. There are 700 invocations of the
16971 DEBUG_PRINT macro alone, so each optimization reduces the size of
16972 the debug version of the subsystem significantly.
16974 A stack trace mechanism has been implemented. The maximum stack
16975 usage is about 2K on 32-bit platforms. The debugger command "stat
16976 stack" will display the current maximum stack usage.
16978 All public symbols and global variables within the subsystem are
16979 now prefixed with the string "Acpi". This keeps all of the
16980 symbols grouped together in a kernel map, and avoids conflicts
16981 with other kernel subsystems.
16983 Most of the internal fixed lookup tables have been moved into the
16984 code segment via the const operator.
16986 Several enhancements have been made to the interpreter to both
16987 reduce the code size and improve performance.
16989 Current core subsystem library code sizes are shown below. These
16990 are the code and data sizes for the acpica.lib produced by the
16991 Microsoft Visual C++ 6.0 compiler, and these values do not include
16992 any ACPI driver or OSPM code. The debug version of the code
16993 includes the full debug trace mechanism which contains over 700
16994 invocations of the DEBUG_PRINT macro, 500 function entry macro
16995 invocations, and over 900 function exit macro invocations --
16996 leading to a much larger code and data size. Note that these
16997 values will vary depending on the efficiency of the compiler and
16998 the compiler options used during generation.
17000 Non-Debug Version: 64K Code, 5K Data, 69K Total
17001 Debug Version: 137K Code, 58K Data, 195K Total
17005 Implemented wbinvd() macro, pending a kernel-wide definition.
17007 Fixed /proc/acpi/event to handle poll() and short reads.
17009 ASL Compiler, version X2026:
17011 Fixed a problem introduced in the previous label where the AML
17013 code emitted for package objects produced packages with zero
17016 ----------------------------------------
17017 Summary of changes for this label: 08_16_01
17019 ACPI CA Core Subsystem:
17021 The following ACPI 2.0 ASL operators have been implemented in the
17022 AML interpreter (These are already supported by the Intel ASL
17023 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
17024 ToBuffer. Support for 64-bit AML constants is implemented in the
17025 AML parser, debugger, and disassembler.
17027 The internal memory tracking mechanism (leak detection code) has
17028 been upgraded to reduce the memory overhead (a separate tracking
17029 block is no longer allocated for each memory allocation), and now
17030 supports all of the internal object caches.
17032 The data structures and code for the internal object caches have
17033 been coelesced and optimized so that there is a single cache and
17034 memory list data structure and a single group of functions that
17035 implement generic cache management. This has reduced the code
17036 size in both the debug and release versions of the subsystem.
17038 The DEBUG_PRINT macro(s) have been optimized for size and replaced
17039 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
17040 different, because it generates a single call to an internal
17041 function. This results in a savings of about 90 bytes per
17042 invocation, resulting in an overall code and data savings of about
17043 16% in the debug version of the subsystem.
17047 Fixed C3 disk corruption problems and re-enabled C3 on supporting
17050 Integrated low-level sleep code by Patrick Mochel.
17052 Further tweaked source code Linuxization.
17058 Support for ACPI 2.0 variable length packages is fixed/completed.
17060 Fixed a problem where the optional length parameter for the ACPI
17061 2.0 ToString operator.
17063 Fixed multiple extraneous error messages when a syntax error is
17064 detected within the declaration line of a control method.
17066 ----------------------------------------
17067 Summary of changes for this label: 07_17_01
17069 ACPI CA Core Subsystem:
17071 Added a new interface named AcpiGetFirmwareTable to obtain any
17072 ACPI table via the ACPI signature. The interface can be called at
17073 any time during kernel initialization, even before the kernel
17074 virtual memory manager is initialized and paging is enabled. This
17075 allows kernel subsystems to obtain ACPI tables very early, even
17076 before the ACPI CA subsystem is initialized.
17078 Fixed a problem where Fields defined with the AnyAcc attribute
17079 could be resolved to the incorrect address under the following
17080 conditions: 1) the field width is larger than 8 bits and 2) the
17081 parent operation region is not defined on a DWORD boundary.
17083 Fixed a problem where the interpreter is not being locked during
17084 namespace initialization (during execution of the _INI control
17085 methods), causing an error when an attempt is made to release it
17088 ACPI 2.0 support in the AML Interpreter has begun and will be
17089 ongoing throughout the rest of this year. In this label, The Mod
17090 operator is implemented.
17092 Added a new data type to contain full PCI addresses named
17093 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
17094 and Function values.
17098 Enhanced the Linux version of the source code to change most
17099 capitalized ACPI type names to lowercase. For example, all
17100 instances of ACPI_STATUS are changed to acpi_status. This will
17101 result in a large diff, but the change is strictly cosmetic and
17102 aligns the CA code closer to the Linux coding standard.
17106 The interfaces to the PCI configuration space have been changed to
17107 add the PCI Segment number and to split the single 32-bit combined
17108 DeviceFunction field into two 16-bit fields. This was
17109 accomplished by moving the four values that define an address in
17110 PCI configuration space (segment, bus, device, and function) to
17111 the new ACPI_PCI_ID structure.
17113 The changes to the PCI configuration space interfaces led to a
17114 reexamination of the complete set of address space access
17115 interfaces for PCI, I/O, and Memory. The previously existing 18
17116 interfaces have proven difficult to maintain (any small change
17117 must be propagated across at least 6 interfaces) and do not easily
17118 allow for future expansion to 64 bits if necessary. Also, on some
17119 systems, it would not be appropriate to demultiplex the access
17120 width (8, 16, 32,or 64) before calling the OSL if the
17121 corresponding native OS interfaces contain a similar access width
17122 parameter. For these reasons, the 18 address space interfaces
17123 have been replaced by these 6 new ones:
17125 AcpiOsReadPciConfiguration
17126 AcpiOsWritePciConfiguration
17132 Added a new interface named AcpiOsGetRootPointer to allow the OSL
17133 to perform the platform and/or OS-specific actions necessary to
17134 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
17135 interface will simply call down to the CA core to perform the low-
17136 memory search for the table. On IA-64, the RSDP is obtained from
17137 EFI. Migrating this interface to the OSL allows the CA core to
17139 remain OS and platform independent.
17141 Added a new interface named AcpiOsSignal to provide a generic
17142 "function code and pointer" interface for various miscellaneous
17143 signals and notifications that must be made to the host OS. The
17144 first such signals are intended to support the ASL Fatal and
17145 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
17146 interface has been obsoleted.
17148 The definition of the AcpiFormatException interface has been
17149 changed to simplify its use. The caller no longer must supply a
17150 buffer to the call; A pointer to a const string is now returned
17151 directly. This allows the call to be easily used in printf
17152 statements, etc. since the caller does not have to manage a local
17156 ASL Compiler, Version X2025:
17158 The ACPI 2.0 Switch/Case/Default operators have been implemented
17159 and are fully functional. They will work with all ACPI 1.0
17160 interpreters, since the operators are simply translated to If/Else
17163 The ACPI 2.0 ElseIf operator is implemented and will also work
17164 with 1.0 interpreters, for the same reason.
17166 Implemented support for ACPI 2.0 variable-length packages. These
17167 packages have a separate opcode, and their size is determined by
17168 the interpreter at run-time.
17170 Documentation The ACPI CA Programmer Reference has been updated to
17171 reflect the new interfaces and changes to existing interfaces.
17173 ------------------------------------------
17174 Summary of changes for this label: 06_15_01
17176 ACPI CA Core Subsystem:
17178 Fixed a problem where a DWORD-accessed field within a Buffer
17179 object would get its byte address inadvertently rounded down to
17180 the nearest DWORD. Buffers are always Byte-accessible.
17182 ASL Compiler, version X2024:
17184 Fixed a problem where the Switch() operator would either fault or
17185 hang the compiler. Note however, that the AML code for this ACPI
17186 2.0 operator is not yet implemented.
17188 Compiler uses the new AcpiOsGetTimer interface to obtain compile
17191 Implementation of the CreateField operator automatically converts
17192 a reference to a named field within a resource descriptor from a
17193 byte offset to a bit offset if required.
17195 Added some missing named fields from the resource descriptor
17196 support. These are the names that are automatically created by the
17197 compiler to reference fields within a descriptor. They are only
17198 valid at compile time and are not passed through to the AML
17201 Resource descriptor named fields are now typed as Integers and
17202 subject to compile-time typechecking when used in expressions.
17204 ------------------------------------------
17205 Summary of changes for this label: 05_18_01
17207 ACPI CA Core Subsystem:
17209 Fixed a couple of problems in the Field support code where bits
17210 from adjacent fields could be returned along with the proper field
17211 bits. Restructured the field support code to improve performance,
17212 readability and maintainability.
17214 New DEBUG_PRINTP macro automatically inserts the procedure name
17215 into the output, saving hundreds of copies of procedure name
17216 strings within the source, shrinking the memory footprint of the
17217 debug version of the core subsystem.
17219 Source Code Structure:
17221 The source code directory tree was restructured to reflect the
17222 current organization of the component architecture. Some files
17223 and directories have been moved and/or renamed.
17227 Fixed leaking kacpidpc processes.
17229 Fixed queueing event data even when /proc/acpi/event is not
17232 ASL Compiler, version X2020:
17234 Memory allocation performance enhancement - over 24X compile time
17235 improvement on large ASL files. Parse nodes and namestring
17236 buffers are now allocated from a large internal compiler buffer.
17238 The temporary .SRC file is deleted unless the "-s" option is
17241 The "-d" debug output option now sends all output to the .DBG file
17242 instead of the console.
17244 "External" second parameter is now optional
17246 "ElseIf" syntax now properly allows the predicate
17248 Last operand to "Load" now recognized as a Target operand
17250 Debug object can now be used anywhere as a normal object.
17252 ResourceTemplate now returns an object of type BUFFER
17254 EISAID now returns an object of type INTEGER
17256 "Index" now works with a STRING operand
17258 "LoadTable" now accepts optional parameters
17260 "ToString" length parameter is now optional
17262 "Interrupt (ResourceType," parse error fixed.
17264 "Register" with a user-defined region space parse error fixed
17266 Escaped backslash at the end of a string ("\\") scan/parse error
17269 "Revision" is now an object of type INTEGER.
17273 ------------------------------------------
17274 Summary of changes for this label: 05_02_01
17278 /proc/acpi/event now blocks properly.
17280 Removed /proc/sys/acpi. You can still dump your DSDT from
17283 ACPI CA Core Subsystem:
17285 Fixed a problem introduced in the previous label where some of the
17286 "small" resource descriptor types were not recognized.
17288 Improved error messages for the case where an ASL Field is outside
17289 the range of the parent operation region.
17291 ASL Compiler, version X2018:
17294 Added error detection for ASL Fields that extend beyond the length
17295 of the parent operation region (only if the length of the region
17296 is known at compile time.) This includes fields that have a
17297 minimum access width that is smaller than the parent region, and
17298 individual field units that are partially or entirely beyond the
17299 extent of the parent.
17303 ------------------------------------------
17304 Summary of changes for this label: 04_27_01
17306 ACPI CA Core Subsystem:
17308 Fixed a problem where the namespace mutex could be released at the
17309 wrong time during execution of AcpiRemoveAddressSpaceHandler.
17311 Added optional thread ID output for debug traces, to simplify
17312 debugging of multiple threads. Added context switch notification
17313 when the debug code realizes that a different thread is now
17314 executing ACPI code.
17316 Some additional external data types have been prefixed with the
17317 string "ACPI_" for consistency. This may effect existing code.
17318 The data types affected are the external callback typedefs - e.g.,
17320 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
17324 Fixed an issue with the OSL semaphore implementation where a
17325 thread was waking up with an error from receiving a SIGCHLD
17328 Linux version of ACPI CA now uses the system C library for string
17329 manipulation routines instead of a local implementation.
17331 Cleaned up comments and removed TBDs.
17333 ASL Compiler, version X2017:
17335 Enhanced error detection and reporting for all file I/O
17340 Programmer Reference updated to version 1.06.
17344 ------------------------------------------
17345 Summary of changes for this label: 04_13_01
17347 ACPI CA Core Subsystem:
17349 Restructured support for BufferFields and RegionFields.
17350 BankFields support is now fully operational. All known 32-bit
17351 limitations on field sizes have been removed. Both BufferFields
17352 and (Operation) RegionFields are now supported by the same field
17355 Resource support now supports QWORD address and IO resources. The
17356 16/32/64 bit address structures and the Extended IRQ structure
17357 have been changed to properly handle Source Resource strings.
17359 A ThreadId of -1 is now used to indicate a "mutex not acquired"
17360 condition internally and must never be returned by AcpiOsThreadId.
17361 This reserved value was changed from 0 since Unix systems allow a
17366 Driver code reorganized to enhance portability
17368 Added a kernel configuration option to control ACPI_DEBUG
17370 Fixed the EC driver to honor _GLK.
17372 ASL Compiler, version X2016:
17374 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
17375 address space was set to 0, not 0x7f as it should be.
17377 ------------------------------------------
17378 Summary of changes for this label: 03_13_01
17380 ACPI CA Core Subsystem:
17382 During ACPI initialization, the _SB_._INI method is now run if
17385 Notify handler fix - notifies are deferred until the parent method
17386 completes execution. This fixes the "mutex already acquired"
17387 issue seen occasionally.
17389 Part of the "implicit conversion" rules in ACPI 2.0 have been
17390 found to cause compatibility problems with existing ASL/AML. The
17391 convert "result-to-target-type" implementation has been removed
17392 for stores to method Args and Locals. Source operand conversion
17393 is still fully implemented. Possible changes to ACPI 2.0
17394 specification pending.
17396 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
17399 Fix for compiler warnings for 64-bit compiles.
17403 /proc output aligned for easier parsing.
17405 Release-version compile problem fixed.
17407 New kernel configuration options documented in Configure.help.
17409 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
17414 Power resource driver integrated with bus manager.
17416 Fixed kernel fault during active cooling for thermal zones.
17420 The source code tree has been restructured.
17424 ------------------------------------------
17425 Summary of changes for this label: 03_02_01
17427 Linux OS Services Layer (OSL):
17429 Major revision of all Linux-specific code.
17431 Modularized all ACPI-specific drivers.
17433 Added new thermal zone and power resource drivers.
17435 Revamped /proc interface (new functionality is under /proc/acpi).
17437 New kernel configuration options.
17439 Linux known issues:
17441 New kernel configuration options not documented in Configure.help
17445 Module dependencies not currently implemented. If used, they
17446 should be loaded in this order: busmgr, power, ec, system,
17447 processor, battery, ac_adapter, button, thermal.
17449 Modules will not load if CONFIG_MODVERSION is set.
17451 IBM 600E - entering S5 may reboot instead of shutting down.
17453 IBM 600E - Sleep button may generate "Invalid <NULL> context"
17456 Some systems may fail with "execution mutex already acquired"
17459 ACPI CA Core Subsystem:
17461 Added a new OSL Interface, AcpiOsGetThreadId. This was required
17462 for the deadlock detection code. Defined to return a non-zero, 32-
17463 bit thread ID for the currently executing thread. May be a non-
17464 zero constant integer on single-thread systems.
17466 Implemented deadlock detection for internal subsystem mutexes. We
17467 may add conditional compilation for this code (debug only) later.
17469 ASL/AML Mutex object semantics are now fully supported. This
17470 includes multiple acquires/releases by owner and support for the
17472 Mutex SyncLevel parameter.
17474 A new "Force Release" mechanism automatically frees all ASL
17475 Mutexes that have been acquired but not released when a thread
17476 exits the interpreter. This forces conformance to the ACPI spec
17477 ("All mutexes must be released when an invocation exits") and
17478 prevents deadlocked ASL threads. This mechanism can be expanded
17479 (later) to monitor other resource acquisitions if OEM ASL code
17480 continues to misbehave (which it will).
17482 Several new ACPI exception codes have been added for the Mutex
17485 Recursive method calls are now allowed and supported (the ACPI
17486 spec does in fact allow recursive method calls.) The number of
17487 recursive calls is subject to the restrictions imposed by the
17488 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
17491 Implemented support for the SyncLevel parameter for control
17492 methods (ACPI 2.0 feature)
17494 Fixed a deadlock problem when multiple threads attempted to use
17497 Fixed a problem where the string length of a String package
17498 element was not always set in a package returned from
17499 AcpiEvaluateObject.
17501 Fixed a problem where the length of a String package element was
17502 not always included in the length of the overall package returned
17503 from AcpiEvaluateObject.
17505 Added external interfaces (Acpi*) to the ACPI debug memory
17506 manager. This manager keeps a list of all outstanding
17507 allocations, and can therefore detect memory leaks and attempts to
17508 free memory blocks more than once. Useful for code such as the
17509 power manager, etc. May not be appropriate for device drivers.
17510 Performance with the debug code enabled is slow.
17512 The ACPI Global Lock is now an optional hardware element.
17514 ASL Compiler Version X2015:
17516 Integrated changes to allow the compiler to be generated on
17517 multiple platforms.
17519 Linux makefile added to generate the compiler on Linux
17523 All platform-specific headers have been moved to their own
17524 subdirectory, Include/Platform.
17526 New source file added, Interpreter/ammutex.c
17528 New header file, Include/acstruct.h
17532 The programmer reference has been updated for the following new
17533 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
17535 ------------------------------------------
17536 Summary of changes for this label: 02_08_01
17538 Core ACPI CA Subsystem: Fixed a problem where an error was
17539 incorrectly returned if the return resource buffer was larger than
17540 the actual data (in the resource interfaces).
17542 References to named objects within packages are resolved to the
17544 full pathname string before packages are returned directly (via
17545 the AcpiEvaluateObject interface) or indirectly via the resource
17548 Linux OS Services Layer (OSL):
17550 Improved /proc battery interface.
17553 Added C-state debugging output and other miscellaneous fixes.
17555 ASL Compiler Version X2014:
17557 All defined method arguments can now be used as local variables,
17558 including the ones that are not actually passed in as parameters.
17559 The compiler tracks initialization of the arguments and issues an
17560 exception if they are used without prior assignment (just like
17563 The -o option now specifies a filename prefix that is used for all
17564 output files, including the AML output file. Otherwise, the
17565 default behavior is as follows: 1) the AML goes to the file
17566 specified in the DSDT. 2) all other output files use the input
17567 source filename as the base.
17569 ------------------------------------------
17570 Summary of changes for this label: 01_25_01
17572 Core ACPI CA Subsystem: Restructured the implementation of object
17573 store support within the interpreter. This includes support for
17574 the Store operator as well as any ASL operators that include a
17577 Partially implemented support for Implicit Result-to-Target
17578 conversion. This is when a result object is converted on the fly
17579 to the type of an existing target object. Completion of this
17580 support is pending further analysis of the ACPI specification
17581 concerning this matter.
17583 CPU-specific code has been removed from the subsystem (hardware
17586 New Power Management Timer functions added
17588 Linux OS Services Layer (OSL): Moved system state transition code
17589 to the core, fixed it, and modified Linux OSL accordingly.
17591 Fixed C2 and C3 latency calculations.
17594 We no longer use the compilation date for the version message on
17595 initialization, but retrieve the version from AcpiGetSystemInfo().
17597 Incorporated for fix Sony VAIO machines.
17599 Documentation: The Programmer Reference has been updated and
17603 ASL Compiler: Version X2013: Fixed a problem where the line
17604 numbering and error reporting could get out of sync in the
17605 presence of multiple include files.
17607 ------------------------------------------
17608 Summary of changes for this label: 01_15_01
17610 Core ACPI CA Subsystem:
17612 Implemented support for type conversions in the execution of the
17613 ASL Concatenate operator (The second operand is converted to
17614 match the type of the first operand before concatenation.)
17616 Support for implicit source operand conversion is partially
17617 implemented. The ASL source operand types Integer, Buffer, and
17618 String are freely interchangeable for most ASL operators and are
17619 converted by the interpreter on the fly as required. Implicit
17620 Target operand conversion (where the result is converted to the
17621 target type before storing) is not yet implemented.
17623 Support for 32-bit and 64-bit BCD integers is implemented.
17625 Problem fixed where a field read on an aligned field could cause a
17626 read past the end of the field.
17628 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
17629 does not return a value, but the caller expects one. (The ASL
17630 compiler flags this as a warning.)
17635 1. Static typechecking of all operands is implemented. This
17636 prevents the use of invalid objects (such as using a Package where
17637 an Integer is required) at compile time instead of at interpreter
17639 2. The ASL source line is printed with ALL errors and warnings.
17640 3. Bug fix for source EOF without final linefeed.
17641 4. Debug option is split into a parse trace and a namespace trace.
17642 5. Namespace output option (-n) includes initial values for
17643 integers and strings.
17644 6. Parse-only option added for quick syntax checking.
17645 7. Compiler checks for duplicate ACPI name declarations
17648 1. Relaxed typechecking to allow interchangeability between
17649 strings, integers, and buffers. These types are now converted by
17650 the interpreter at runtime.
17651 2. Compiler reports time taken by each internal subsystem in the
17655 ------------------------------------------
17656 Summary of changes for this label: 12_14_00
17660 This is the first official release of the compiler. Since the
17661 compiler requires elements of the Core Subsystem, this label
17662 synchronizes everything.
17664 ------------------------------------------
17665 Summary of changes for this label: 12_08_00
17668 Fixed a problem where named references within the ASL definition
17669 of both OperationRegions and CreateXXXFields did not work
17670 properly. The symptom was an AE_AML_OPERAND_TYPE during
17671 initialization of the region/field. This is similar (but not
17672 related internally) to the problem that was fixed in the last
17675 Implemented both 32-bit and 64-bit support for the BCD ASL
17676 functions ToBCD and FromBCD.
17678 Updated all legal headers to include "2000" in the copyright
17681 ------------------------------------------
17682 Summary of changes for this label: 12_01_00
17684 Fixed a problem where method invocations within the ASL definition
17685 of both OperationRegions and CreateXXXFields did not work
17686 properly. The symptom was an AE_AML_OPERAND_TYPE during
17687 initialization of the region/field:
17689 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
17690 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
17693 Fixed a problem where operators with more than one nested
17694 subexpression would fail. The symptoms were varied, by mostly
17695 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
17696 problem that has gone unnoticed until now.
17698 Subtract (Add (1,2), Multiply (3,4))
17700 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
17701 previous build (The prefix part of a relative path was handled
17704 Fixed a problem where Operation Region initialization failed if
17705 the operation region name was a "namepath" instead of a simple
17706 "nameseg". Symptom was an AE_NO_OPERAND error.
17708 Fixed a problem where an assignment to a local variable via the
17709 indirect RefOf mechanism only worked for the first such
17710 assignment. Subsequent assignments were ignored.
17712 ------------------------------------------
17713 Summary of changes for this label: 11_15_00
17715 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
17716 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
17717 the AML interpreter does NOT have support for the new 2.0 ASL
17718 grammar terms at this time.
17720 All ACPI hardware access is via the GAS structures in the ACPI 2.0
17723 All physical memory addresses across all platforms are now 64 bits
17724 wide. Logical address width remains dependent on the platform
17727 AcpiOsMapMemory interface changed to a 64-bit physical address.
17729 The AML interpreter integer size is now 64 bits, as per the ACPI
17732 For backwards compatibility with ACPI 1.0, ACPI tables with a
17733 revision number less than 2 use 32-bit integers only.
17735 Fixed a problem where the evaluation of OpRegion operands did not
17736 always resolve them to numbers properly.
17738 ------------------------------------------
17739 Summary of changes for this label: 10_20_00
17741 Fix for CBN_._STA issue. This fix will allow correct access to
17742 CBN_ OpRegions when the _STA returns 0x8.
17744 Support to convert ACPI constants (Ones, Zeros, One) to actual
17745 values before a package object is returned
17747 Fix for method call as predicate to if/while construct causing
17748 incorrect if/while behavior
17750 Fix for Else block package lengths sometimes calculated wrong (if
17753 Fix for Processor object length field, was always zero
17755 Table load abort if FACP sanity check fails
17757 Fix for problem with Scope(name) if name already exists
17759 Warning emitted if a named object referenced cannot be found
17760 (resolved) during method execution.
17766 ------------------------------------------
17767 Summary of changes for this label: 9_29_00
17769 New table initialization interfaces: AcpiInitializeSubsystem no
17770 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
17771 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
17772 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
17775 Note: These interface changes require changes to all existing OSDs
17777 The PCI_Config default address space handler is always installed
17778 at the root namespace object.
17780 -------------------------------------------
17781 Summary of changes for this label: 09_15_00
17783 The new initialization architecture is implemented. New
17784 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
17785 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
17787 (Namespace is automatically loaded when a table is loaded)
17789 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
17790 52 bytes to 32 bytes. There is usually one of these for every
17791 namespace object, so the memory savings is significant.
17793 Implemented just-in-time evaluation of the CreateField operators.
17795 Bug fixes for IA-64 support have been integrated.
17797 Additional code review comments have been implemented
17799 The so-called "third pass parse" has been replaced by a final walk
17800 through the namespace to initialize all operation regions (address
17801 spaces) and fields that have not yet been initialized during the
17802 execution of the various _INI and REG methods.
17804 New file - namespace/nsinit.c
17806 -------------------------------------------
17807 Summary of changes for this label: 09_01_00
17809 Namespace manager data structures have been reworked to change the
17810 primary object from a table to a single object. This has
17811 resulted in dynamic memory savings of 3X within the namespace and
17812 2X overall in the ACPI CA subsystem.
17814 Fixed problem where the call to AcpiEvFindPciRootBuses was
17815 inadvertently left commented out.
17817 Reduced the warning count when generating the source with the GCC
17820 Revision numbers added to each module header showing the
17821 SourceSafe version of the file. Please refer to this version
17822 number when giving us feedback or comments on individual modules.
17824 The main object types within the subsystem have been renamed to
17825 clarify their purpose:
17827 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
17828 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
17829 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
17831 NOTE: no changes to the initialization sequence are included in
17834 -------------------------------------------
17835 Summary of changes for this label: 08_23_00
17837 Fixed problem where TerminateControlMethod was being called
17838 multiple times per method
17840 Fixed debugger problem where single stepping caused a semaphore to
17843 Improved performance through additional parse object caching -
17844 added ACPI_EXTENDED_OP type
17846 -------------------------------------------
17847 Summary of changes for this label: 08_10_00
17849 Parser/Interpreter integration: Eliminated the creation of
17850 complete parse trees for ACPI tables and control methods.
17851 Instead, parse subtrees are created and then deleted as soon as
17852 they are processed (Either entered into the namespace or executed
17853 by the interpreter). This reduces the use of dynamic kernel
17854 memory significantly. (about 10X)
17856 Exception codes broken into classes and renumbered. Be sure to
17857 recompile all code that includes acexcep.h. Hopefully we won't
17858 have to renumber the codes again now that they are split into
17859 classes (environment, programmer, AML code, ACPI table, and
17862 Fixed some additional alignment issues in the Resource Manager
17865 Implemented semaphore tracking in the AcpiExec utility, and fixed
17866 several places where mutexes/semaphores were being unlocked
17867 without a corresponding lock operation. There are no known
17868 semaphore or mutex "leaks" at this time.
17870 Fixed the case where an ASL Return operator is used to return an
17873 -------------------------------------------
17874 Summary of changes for this label: 07_28_00
17876 Fixed a problem with the way addresses were calculated in
17877 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
17878 manifested itself when a Field was created with WordAccess or
17879 DwordAccess, but the field unit defined within the Field was less
17881 than a Word or Dword.
17883 Fixed a problem in AmlDumpOperands() module's loop to pull
17884 operands off of the operand stack to display information. The
17885 problem manifested itself as a TLB error on 64-bit systems when
17886 accessing an operand stack with two or more operands.
17888 Fixed a problem with the PCI configuration space handlers where
17889 context was getting confused between accesses. This required a
17890 change to the generic address space handler and address space
17891 setup definitions. Handlers now get both a global handler context
17892 (this is the one passed in by the user when executing
17893 AcpiInstallAddressSpaceHandler() and a specific region context
17894 that is unique to each region (For example, the _ADR, _SEG and
17895 _BBN values associated with a specific region). The generic
17896 function definitions have changed to the following:
17898 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
17899 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
17900 *HandlerContext, // This used to be void *Context void
17901 *RegionContext); // This is an additional parameter
17903 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
17904 RegionHandle, UINT32 Function, void *HandlerContext, void
17905 **RegionContext); // This used to be **ReturnContext
17907 -------------------------------------------
17908 Summary of changes for this label: 07_21_00
17910 Major file consolidation and rename. All files within the
17911 interpreter have been renamed as well as most header files. This
17912 was done to prevent collisions with existing files in the host
17913 OSs -- filenames such as "config.h" and "global.h" seem to be
17914 quite common. The VC project files have been updated. All
17915 makefiles will require modification.
17917 The parser/interpreter integration continues in Phase 5 with the
17918 implementation of a complete 2-pass parse (the AML is parsed
17919 twice) for each table; This avoids the construction of a huge
17920 parse tree and therefore reduces the amount of dynamic memory
17921 required by the subsystem. Greater use of the parse object cache
17922 means that performance is unaffected.
17924 Many comments from the two code reviews have been rolled in.
17926 The 64-bit alignment support is complete.
17928 -------------------------------------------
17929 Summary of changes for this label: 06_30_00
17931 With a nod and a tip of the hat to the technology of yesteryear,
17932 we've added support in the source code for 80 column output
17933 devices. The code is now mostly constrained to 80 columns or
17934 less to support environments and editors that 1) cannot display
17935 or print more than 80 characters on a single line, and 2) cannot
17936 disable line wrapping.
17938 A major restructuring of the namespace data structure has been
17939 completed. The result is 1) cleaner and more
17940 understandable/maintainable code, and 2) a significant reduction
17941 in the dynamic memory requirement for each named ACPI object
17944 -------------------------------------------
17945 Summary of changes for this label: 06_23_00
17947 Linux support has been added. In order to obtain approval to get
17948 the ACPI CA subsystem into the Linux kernel, we've had to make
17949 quite a few changes to the base subsystem that will affect all
17950 users (all the changes are generic and OS- independent). The
17951 effects of these global changes have been somewhat far reaching.
17952 Files have been merged and/or renamed and interfaces have been
17953 renamed. The major changes are described below.
17955 Osd* interfaces renamed to AcpiOs* to eliminate namespace
17956 pollution/confusion within our target kernels. All OSD
17957 interfaces must be modified to match the new naming convention.
17959 Files merged across the subsystem. A number of the smaller source
17960 and header files have been merged to reduce the file count and
17961 increase the density of the existing files. There are too many
17962 to list here. In general, makefiles that call out individual
17963 files will require rebuilding.
17965 Interpreter files renamed. All interpreter files now have the
17966 prefix am* instead of ie* and is*.
17968 Header files renamed: The acapi.h file is now acpixf.h. The
17969 acpiosd.h file is now acpiosxf.h. We are removing references to
17970 the acronym "API" since it is somewhat windowsy. The new name is
17971 "external interface" or xface or xf in the filenames.j
17974 All manifest constants have been forced to upper case (some were
17975 mixed case.) Also, the string "ACPI_" has been prepended to many
17976 (not all) of the constants, typedefs, and structs.
17978 The globals "DebugLevel" and "DebugLayer" have been renamed
17979 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
17981 All other globals within the subsystem are now prefixed with
17982 "AcpiGbl_" Internal procedures within the subsystem are now
17983 prefixed with "Acpi" (with only a few exceptions). The original
17984 two-letter abbreviation for the subcomponent remains after "Acpi"
17985 - for example, CmCallocate became AcpiCmCallocate.
17987 Added a source code translation/conversion utility. Used to
17988 generate the Linux source code, it can be modified to generate
17989 other types of source as well. Can also be used to cleanup
17990 existing source by removing extraneous spaces and blank lines.
17991 Found in tools/acpisrc/*
17993 OsdUnMapMemory was renamed to OsdUnmapMemory and then
17994 AcpiOsUnmapMemory. (UnMap became Unmap).
17996 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
17997 When set to one, this indicates that the caller wants to use the
17999 semaphore as a mutex, not a counting semaphore. ACPI CA uses
18000 both types. However, implementers of this call may want to use
18001 different OS primitives depending on the type of semaphore
18002 requested. For example, some operating systems provide separate
18004 "mutex" and "semaphore" interfaces - where the mutex interface is
18005 much faster because it doesn't have all the overhead of a full
18006 semaphore implementation.
18008 Fixed a deadlock problem where a method that accesses the PCI
18009 address space can block forever if it is the first access to the
18012 -------------------------------------------
18013 Summary of changes for this label: 06_02_00
18015 Support for environments that cannot handle unaligned data
18016 accesses (e.g. firmware and OS environments devoid of alignment
18017 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
18018 been added (via configurable macros) in these three areas: -
18019 Transfer of data from the raw AML byte stream is done via byte
18020 moves instead of word/dword/qword moves. - External objects are
18021 aligned within the user buffer, including package elements (sub-
18022 objects). - Conversion of name strings to UINT32 Acpi Names is now
18025 The Store operator was modified to mimic Microsoft's
18026 implementation when storing to a Buffer Field.
18028 Added a check of the BM_STS bit before entering C3.
18030 The methods subdirectory has been obsoleted and removed. A new
18031 file, cmeval.c subsumes the functionality.
18033 A 16-bit (DOS) version of AcpiExec has been developed. The
18034 makefile is under the acpiexec directory.