1 ----------------------------------------
2 29 July 2016. Summary of changes for version 20160729:
4 This release is available at https://acpica.org/downloads
7 1) ACPICA kernel-resident subsystem:
9 Implemented basic UEFI support for the various ACPICA tools. This
11 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
12 2) Support to obtain the ACPI tables on UEFI.
13 3) Local implementation of required C library functions not available on
15 4) A front-end (main) function for the tools for UEFI-related
18 The initial deployment of this support is the AcpiDump utility executing
19 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
20 Current environments supported are Linux/Unix. MSVC generation is not
21 supported at this time. See the generate/efi/README file for build
22 instructions. Lv Zheng.
24 Future plans include porting the AcpiExec utility to execute natively on
25 the platform with I/O and memory access. This will allow viewing/dump of
26 the platform namespace and native execution of ACPI control methods that
27 access the actual hardware. To fully implement this support, the OSL
28 functions below must be implemented with UEFI interfaces. Any community
29 help in the implementation of these functions would be appreciated:
34 AcpiOsReadPciConfiguration
35 AcpiOsWritePciConfiguration
38 Restructured and standardized the C library configuration for ACPICA,
39 resulting in the various configuration options below. This includes a
40 global restructuring of the compiler-dependent and platform-dependent
41 include files. These changes may affect the existing platform-dependent
42 configuration files on some hosts. Lv Zheng.
44 The current C library configuration options appear below. For any issues,
45 it may be helpful to examine the existing compiler-dependent and
46 platform-dependent files as examples. Lv Zheng.
49 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
51 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
52 2) Unix/Windows/BSD applications:
53 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
55 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
57 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
59 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
60 4) UEFI applications (EDK2/StdLib):
61 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
62 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
65 AML interpreter: "module-level code" support. Allows for execution of so-
66 called "executable" AML code (math/logical operations, etc.) outside of
67 control methods not just at the module level (top level) but also within
68 any scope declared outside of a control method - Scope{}, Device{},
69 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
71 Simplified the configuration of the "maximum AML loops" global option by
72 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
76 Example Code and Data Size: These are the sizes for the OS-independent
77 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
78 debug version of the code includes the debug output trace mechanism and
79 has a much larger code and data size.
82 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
83 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
86 2) iASL Compiler/Disassembler and Tools:
88 iASL: Add full support for the RASF ACPI table (RAS Features Table).
89 Includes disassembler, data table compiler, and header support.
91 iASL Expand "module-level code" support. Allows for
92 compilation/disassembly of so-called "executable" AML code (math/logical
93 operations, etc.) outside of control methods not just at the module level
94 (top level) but also within any scope declared outside of a control
95 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
98 AcpiDump: Added support for dumping all SSDTs on newer versions of
99 Windows. These tables are now easily available -- SSDTs are not available
100 through the registry on older versions.
102 ----------------------------------------
103 27 May 2016. Summary of changes for version 20160527:
105 This release is available at https://acpica.org/downloads
108 1) ACPICA kernel-resident subsystem:
110 Temporarily reverted the new arbitrary bit length/alignment support in
111 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
112 a number of regressions with the new code that need to be fully resolved
113 and tested before this support can be finally integrated into ACPICA.
114 Apologies for any inconveniences these issues may have caused.
116 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
117 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
118 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
120 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
121 option. Adds a new return macro, return_STR. Junk-uk Kim.
123 Example Code and Data Size: These are the sizes for the OS-independent
124 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
125 debug version of the code includes the debug output trace mechanism and
126 has a much larger code and data size.
129 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
130 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
132 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
133 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
135 ----------------------------------------
136 22 April 2016. Summary of changes for version 20160422:
138 1) ACPICA kernel-resident subsystem:
140 Fixed a regression in the GAS (generic address structure) arbitrary bit
141 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
142 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
144 ACPI 6.0: Added support for new/renamed resource macros. One new argument
145 was added to each of these macros, and the original name has been
146 deprecated. The AML disassembler will always disassemble to the new
147 names. Support for the new macros was added to iASL, disassembler,
148 resource manager, and the acpihelp utility. ACPICA BZ 1274.
150 I2cSerialBus -> I2cSerialBusV2
151 SpiSerialBus -> SpiSerialBusV2
152 UartSerialBus -> UartSerialBusV2
154 ACPI 6.0: Added support for a new integer field that was appended to the
155 package object returned by the _BIX method. This adds iASL compile-time
156 and AML runtime error checking. ACPICA BZ 1273.
158 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
159 Subspace Type2" (Headers, Disassembler, and data table compiler).
161 Example Code and Data Size: These are the sizes for the OS-independent
162 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
163 debug version of the code includes the debug output trace mechanism and
164 has a much larger code and data size.
167 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
168 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
170 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
171 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
174 2) iASL Compiler/Disassembler and Tools:
176 iASL: Implemented an ASL grammar extension to allow/enable executable
177 "module-level code" to be created and executed under the various
178 operators that create new scopes. This type of AML code is already
179 supported in all known AML interpreters, and the grammar change will
180 appear in the next version of the ACPI specification. Simplifies the
181 conditional runtime creation of named objects under these object types:
189 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
190 ease-of-use to the ASL language. The syntax is similar to the
191 corresponding C operator, and is implemented with the existing AML While
192 opcode -- thus requiring no changes to existing AML interpreters.
194 For (Initialize, Predicate, Update) {TermList}
199 Initializer // Nothing | TermArg => ComputationalData
200 Predicate // Nothing | TermArg => ComputationalData
201 Update // Nothing | TermArg => ComputationalData
205 iASL: The _HID/_ADR detection and validation has been enhanced to search
206 under conditionals in order to allow these objects to be conditionally
209 iASL: Fixed several issues with the constant folding feature. The
210 improvement allows better detection and resolution of statements that can
211 be folded at compile time. ACPICA BZ 1266.
213 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
214 conversion to the ASL ElseIf operator where incorrect ASL code could be
217 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
218 sometimes an extra (and extraneous) set of parentheses were emitted for
219 some combinations of operators. Although this did not cause any problems
220 with recompilation of the disassembled code, it made the code more
221 difficult to read. David Box. ACPICA BZ 1231.
223 iASL: Changed to ignore the unreferenced detection for predefined names
224 of resource descriptor elements, when the resource descriptor is
225 created/defined within a control method.
227 iASL: Disassembler: Fix a possible fault with externally declared Buffer
230 ----------------------------------------
231 18 March 2016. Summary of changes for version 20160318:
233 1) ACPICA kernel-resident subsystem:
235 Added support for arbitrary bit lengths and bit offsets for registers
236 defined by the Generic Address Structure. Previously, only aligned bit
237 lengths of 8/16/32/64 were supported. This was sufficient for many years,
238 but recently some machines have been seen that require arbitrary bit-
239 level support. ACPICA BZ 1240. Lv Zheng.
241 Fixed an issue where the \_SB._INI method sometimes must be evaluated
242 before any _REG methods are evaluated. Lv Zheng.
244 Implemented several changes related to ACPI table support
245 (Headers/Disassembler/TableCompiler):
246 NFIT: For ACPI 6.1, updated to add some additional new fields and
248 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
250 DMAR: Added new constants per the 10/2014 DMAR spec.
251 IORT: Added new subtable per the 10/2015 IORT spec.
252 HEST: For ACPI 6.1, added new constants and new subtable.
253 DBG2: Added new constants per the 12/2015 DBG2 spec.
254 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
256 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
258 Updated header support for the DMAR table to match the current version of
261 Added extensions to the ASL Concatenate operator to allow any ACPI object
262 to be passed as an operand. Any object other than Integer/String/Buffer
263 simply returns a string containing the object type. This extends the
264 usefulness of the Printf macros. Previously, Concatenate would abort the
265 control method if a non-data object was encountered.
267 ACPICA source code: Deployed the C "const" keyword across the source code
268 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
270 Example Code and Data Size: These are the sizes for the OS-independent
271 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
272 debug version of the code includes the debug output trace mechanism and
273 has a much larger code and data size.
276 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
277 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
279 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
280 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
283 2) iASL Compiler/Disassembler and Tools:
285 iASL/Disassembler: Improved the heuristic used to determine the number of
286 arguments for an externally defined control method (a method in another
287 table). Although this is an improvement, there is no deterministic way to
288 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
289 will completely solve this problem as it is deployed (automatically) in
292 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
293 statements that could cause errors when the disassembled file is
294 compiled. ACPICA BZ 1243. David Box.
296 iASL: Fixed a regression caused by the merger of the two versions of the
297 local strtoul64. Because of a dependency on a global variable, strtoul64
298 could return an error for integers greater than a 32-bit value. ACPICA BZ
301 iASL: Fixed a regression where a fault could occur for an ASL Return
302 statement if it invokes a control method that is not resolved. ACPICA BZ
305 AcpiXtract: Improved input file validation: detection of binary files and
306 non-acpidump text files.
308 ----------------------------------------
309 12 February 2016. Summary of changes for version 20160212:
311 1) ACPICA kernel-resident subsystem:
313 Implemented full support for the ACPI 6.1 specification (released in
314 January). This version of the specification is available at:
315 http://www.uefi.org/specifications
317 Only a relatively small number of changes were required in ACPICA to
318 support ACPI 6.1, in these areas:
319 - New predefined names
321 - A new subtable for HEST
322 - A few other header changes for new values
324 Ensure \_SB_._INI is executed before any _REG methods are executed. There
325 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
327 Reverted a change made in version 20151218 which enabled method
328 invocations to be targets of various ASL operators (SuperName and Target
329 grammar elements). While the new behavior is supported by the ACPI
330 specification, other AML interpreters do not support this behavior and
331 never will. The ACPI specification will be updated for ACPI 6.2 to remove
332 this support. Therefore, the change was reverted to the original ACPICA
335 ACPICA now supports the GCC 6 compiler.
337 Current Release: (Note: build changes increased sizes)
338 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
339 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
341 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
342 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
345 2) iASL Compiler/Disassembler and Tools:
347 Completed full support for the ACPI 6.0 External() AML opcode. The
348 compiler emits an external AML opcode for each ASL External statement.
349 This opcode is used by the disassembler to assist with the disassembly of
350 external control methods by specifying the required number of arguments
351 for the method. AML interpreters do not use this opcode. To ensure that
352 interpreters do not even see the opcode, a block of one or more external
353 opcodes is surrounded by an "If(0)" construct. As this feature becomes
354 commonly deployed in BIOS code, the ability of disassemblers to correctly
355 disassemble AML code will be greatly improved. David Box.
357 iASL: Implemented support for an optional cross-reference output file.
358 The -lx option will create a the cross-reference file with the suffix
359 "xrf". Three different types of cross-reference are created in this file:
360 - List of object references made from within each control method
361 - Invocation (caller) list for each user-defined control method
362 - List of references to each non-method object in the namespace
364 iASL: Method invocations as ASL Target operands are now disallowed and
365 flagged as errors in preparation for ACPI 6.2 (see the description of the
368 ----------------------------------------
369 8 January 2016. Summary of changes for version 20160108:
371 1) ACPICA kernel-resident subsystem:
373 Updated all ACPICA copyrights and signons to 2016: Added the 2016
374 copyright to all source code module headers and utility/tool signons.
375 This includes the standard Linux dual-license header. This affects
376 virtually every file in the ACPICA core subsystem, iASL compiler, all
377 ACPICA utilities, and the ACPICA test suite.
379 Fixed a regression introduced in version 20151218 concerning the
380 execution of so-called module-level ASL/AML code. Namespace objects
381 created under a module-level If() construct were not properly/fully
382 entered into the namespace and could cause an interpreter fault when
385 Example Code and Data Size: These are the sizes for the OS-independent
386 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
387 debug version of the code includes the debug output trace mechanism and
388 has a much larger code and data size.
391 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
392 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
394 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
395 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
398 2) iASL Compiler/Disassembler and Tools:
400 Fixed a problem with the compilation of the GpioIo and GpioInt resource
401 descriptors. The _PIN field name was incorrectly defined to be an array
402 of 32-bit values, but the _PIN values are in fact 16 bits each. This
403 would cause incorrect bit width warnings when using Word (16-bit) fields
404 to access the descriptors.
407 ----------------------------------------
408 18 December 2015. Summary of changes for version 20151218:
410 1) ACPICA kernel-resident subsystem:
412 Implemented per-AML-table execution of "module-level code" as individual
413 ACPI tables are loaded into the namespace during ACPICA initialization.
414 In other words, any module-level code within an AML table is executed
415 immediately after the table is loaded, instead of batched and executed
416 after all of the tables have been loaded. This provides compatibility
417 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
420 To fully support the feature above, the default operation region handlers
421 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
422 installed before any ACPI tables are loaded. This enables module-level
423 code to access these address spaces during the table load and module-
424 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
427 Implemented several changes to the internal _REG support in conjunction
428 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
429 utilities for the changes above. Although these tools were changed, host
430 operating systems that simply use the default handlers for SystemMemory,
431 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
433 For example, in the code below, DEV1 is conditionally added to the
434 namespace by the DSDT via module-level code that accesses an operation
435 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
436 created immediately after the DSDT is loaded in order for the SSDT to
437 successfully reference DEV1. Previously, this code would cause an
438 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
439 fully supported by ACPICA.
441 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
443 OperationRegion (OPR1, SystemMemory, 0x400, 32)
444 Field (OPR1, AnyAcc, NoLock, Preserve)
455 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
457 External (\DEV1, DeviceObj)
463 Fixed an AML interpreter problem where control method invocations were
464 not handled correctly when the invocation was itself a SuperName argument
465 to another ASL operator. In these cases, the method was not invoked.
466 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
474 Signal, Release, Reset
477 Implemented automatic String-to-ObjectReference conversion support for
478 packages returned by predefined names (such as _DEP). A common BIOS error
479 is to add double quotes around an ObjectReference namepath, which turns
480 the reference into an unexpected string object. This support detects the
481 problem and corrects it before the package is returned to the caller that
482 invoked the method. Lv Zheng.
484 Implemented extensions to the Concatenate operator. Concatenate now
485 accepts any type of object, it is not restricted to simply
486 Integer/String/Buffer. For objects other than these 3 basic data types,
487 the argument is treated as a string containing the name of the object
488 type. This expands the utility of Concatenate and the Printf/Fprintf
489 macros. ACPICA BZ 1222.
491 Cleaned up the output of the ASL Debug object. The timer() value is now
492 optional and no longer emitted by default. Also, the basic data types of
493 Integer/String/Buffer are simply emitted as their values, without a data
494 type string -- since the data type is obvious from the output. ACPICA BZ
497 Example Code and Data Size: These are the sizes for the OS-independent
498 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
499 debug version of the code includes the debug output trace mechanism and
500 has a much larger code and data size.
503 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
504 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
506 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
507 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
510 2) iASL Compiler/Disassembler and Tools:
512 iASL: Fixed some issues with the ASL Include() operator. This operator
513 was incorrectly defined in the iASL parser rules, causing a new scope to
514 be opened for the code within the include file. This could lead to
515 several issues, including allowing ASL code that is technically illegal
516 and not supported by AML interpreters. Note, this does not affect the
517 related #include preprocessor operator. ACPICA BZ 1212.
519 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
520 operator is essentially an ASL macro since there is no AML opcode
521 associated with it. The code emitted by the iASL compiler for ElseIf is
522 an Else opcode followed immediately by an If opcode. The disassembler
523 will now emit an ElseIf if it finds an Else immediately followed by an
524 If. This simplifies the decoded ASL, especially for deeply nested
525 If..Else and large Switch constructs. Thus, the disassembled code more
526 closely follows the original source ASL. ACPICA BZ 1211. Example:
538 ElseIf (Arg0 == 0x02)
543 AcpiExec: Added support for the new module level code behavior and the
544 early region installation. This required a small change to the
545 initialization, since AcpiExec must install its own operation region
548 AcpiExec: Added support to make the debug object timer optional. Default
549 is timer disabled. This cleans up the debug object output -- the timer
552 AcpiExec: Multiple ACPI tables are now loaded in the order that they
553 appear on the command line. This can be important when there are
554 interdependencies/references between the tables.
556 iASL/Templates. Add support to generate template files with multiple
557 SSDTs within a single output file. Also added ommand line support to
558 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
562 ----------------------------------------
563 24 November 2015. Summary of changes for version 20151124:
565 1) ACPICA kernel-resident subsystem:
567 Fixed a possible regression for a previous update to FADT handling. The
568 FADT no longer has a fixed table ID, causing some issues with code that
569 was hardwired to a specific ID. Lv Zheng.
571 Fixed a problem where the method auto-serialization could interfere with
572 the current SyncLevel. This change makes the auto-serialization support
573 transparent to the SyncLevel support and management.
575 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
576 interface is intended for early access to the namespace during the
577 initial namespace device discovery walk. The _SUB method has been seen to
578 access operation regions in some cases, causing errors because the
579 operation regions are not fully initialized.
581 AML Debugger: Fixed some issues with the terminate/quit/exit commands
582 that can cause faults. Lv Zheng.
584 AML Debugger: Add thread ID support so that single-step mode only applies
585 to the AML Debugger thread. This prevents runtime errors within some
588 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
589 methods that are invoked by this interface are optional, removed warnings
590 emitted for the case where one or more of these methods do not exist.
591 ACPICA BZ 1208, original change by Prarit Bhargava.
593 Made a major pass through the entire ACPICA source code base to
594 standardize formatting that has diverged a bit over time. There are no
595 functional changes, but this will of course cause quite a few code
596 differences from the previous ACPICA release.
598 Example Code and Data Size: These are the sizes for the OS-independent
599 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
600 debug version of the code includes the debug output trace mechanism and
601 has a much larger code and data size.
604 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
605 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
607 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
608 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
611 2) iASL Compiler/Disassembler and Tools:
613 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
614 definition blocks within a single ASL file and the resulting AML file.
615 Support for this type of file was also added to the various tools that
616 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
617 example code below shows two definition blocks within the same file:
619 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
623 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
627 iASL: Enhanced typechecking for the Name() operator. All expressions for
628 the value of the named object must be reduced/folded to a single constant
629 at compile time, as per the ACPI specification (the AML definition of
632 iASL: Fixed some code indentation issues for the -ic and -ia options (C
633 and assembly headers). Now all emitted code correctly begins in column 1.
635 iASL: Added an error message for an attempt to open a Scope() on an
636 object defined in an SSDT. The DSDT is always loaded into the namespace
637 first, so any attempt to open a Scope on an SSDT object will fail at
641 ----------------------------------------
642 30 September 2015. Summary of changes for version 20150930:
644 1) ACPICA kernel-resident subsystem:
646 Debugger: Implemented several changes and bug fixes to assist support for
647 the in-kernel version of the AML debugger. Lv Zheng.
648 - Fix the "predefined" command for in-kernel debugger.
649 - Do not enter debug command loop for the help and version commands.
650 - Disallow "execute" command during execution/single-step of a method.
652 Interpreter: Updated runtime typechecking for all operators that have
653 target operands. The operand is resolved and validated that it is legal.
654 For example, the target cannot be a non-data object such as a Device,
655 Mutex, ThermalZone, etc., as per the ACPI specification.
657 Debugger: Fixed the double-mutex user I/O handshake to work when local
658 deadlock detection is enabled.
660 Debugger: limited display of method locals and arguments (LocalX and
661 ArgX) to only those that have actually been initialized. This prevents
662 lines of extraneous output.
664 Updated the definition of the NFIT table to correct the bit polarity of
665 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
667 Example Code and Data Size: These are the sizes for the OS-independent
668 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
669 debug version of the code includes the debug output trace mechanism and
670 has a much larger code and data size.
673 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
674 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
676 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
677 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
680 2) iASL Compiler/Disassembler and Tools:
682 iASL: Improved the compile-time typechecking for operands of many of the
685 -- Added an option to disable compiler operand/operator typechecking (-
688 -- For the following operators, the TermArg operands are now validated
689 when possible to be Integer data objects: BankField, OperationRegion,
690 DataTableRegion, Buffer, and Package.
692 -- Store (Source, Target): Both the source and target operands are
693 resolved and checked that the operands are both legal. For example,
694 neither operand can be a non-data object such as a Device, Mutex,
695 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
696 operator can be used to store an object to any type of target object.
698 -- Store (Source, Target): If the source is a Package object, the target
699 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
700 is a Package, the source must also be a Package.
702 -- Store (Source, Target): A warning is issued if the source and target
703 resolve to the identical named object.
705 -- Store (Source, <method invocation>): An error is generated for the
706 target method invocation, as this construct is not supported by the AML
709 -- For all ASL math and logic operators, the target operand must be a
710 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
711 includes the function return value also.
713 -- External declarations are also included in the typechecking where
714 possible. External objects defined using the UnknownObj keyword cannot be
715 typechecked, however.
717 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
719 - Legacy code: Index(PKG1, 3)
720 - New ASL+ code: PKG1[3]
721 This completes the ACPI 6.0 ASL+ support as it was the only operator not
724 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
725 spaces were inadvertently appended to the filename, causing file access
726 and deletion problems on some systems.
728 ASL Test Suite (ASLTS): Updated the master makefile to generate all
729 possible compiler output files when building the test suite -- thus
730 exercising these features of the compiler. These files are automatically
731 deleted when the test suite exits.
734 ----------------------------------------
735 18 August 2015. Summary of changes for version 20150818:
737 1) ACPICA kernel-resident subsystem:
739 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
740 Zheng. ACPICA BZ 1186.
742 Completed development to ensure that the ACPICA Disassembler and Debugger
743 are fully standalone components of ACPICA. Removed cross-component
744 dependences. Lv Zheng.
746 The max-number-of-AML-loops is now runtime configurable (previously was
747 compile-time only). This is essentially a loop timeout to force-abort
748 infinite AML loops. ACPCIA BZ 1192.
750 Debugger: Cleanup output to dump ACPI names and namepaths without any
751 trailing underscores. Lv Zheng. ACPICA BZ 1135.
753 Removed unnecessary conditional compilations across the Debugger and
754 Disassembler components where entire modules could be left uncompiled.
756 The aapits test is deprecated and has been removed from the ACPICA git
757 tree. The test has never been completed and has not been maintained, thus
758 becoming rather useless. ACPICA BZ 1015, 794.
760 A batch of small changes to close bugzilla and other reports:
761 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
762 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
763 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
764 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
766 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
768 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
770 - Debugger: Split debugger initialization/termination interfaces. Lv
772 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
774 - AcpiExec: Add debug message during _REG method phase during table
776 - AcpiNames: Fix a regression where some output was missing and no longer
778 - Debugger: General cleanup and simplification. Lv Zheng.
779 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
781 Example Code and Data Size: These are the sizes for the OS-independent
782 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
783 debug version of the code includes the debug output trace mechanism and
784 has a much larger code and data size.
787 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
788 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
790 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
791 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
794 2) iASL Compiler/Disassembler and Tools:
796 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
797 were not handled properly and caused load errors. Now, properly invoke
798 and use the ACPICA auto-reallocate mechanism for ACPI table data
799 structures. ACPICA BZ 1188
801 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
804 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
805 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
806 executed during initialization. ACPICA BZ 1187, 1189.
808 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
809 that corresponds to each disassembled ASL statement, to simplify
810 debugging. ACPICA BZ 1191.
812 Debugger: Add option to the "objects" command to display a summary of the
813 current namespace objects (Object type and count). This is displayed if
814 the command is entered with no arguments.
816 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
819 ----------------------------------------
820 17 July 2015. Summary of changes for version 20150717:
822 1) ACPICA kernel-resident subsystem:
824 Improved the partitioning between the Debugger and Disassembler
825 components. This allows the Debugger to be used standalone within kernel
826 code without the Disassembler (which is used for single stepping also).
827 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
829 Debugger: Implemented a new command to trace the execution of control
830 methods (Trace). This is especially useful for the in-kernel version of
831 the debugger when file I/O may not be available for method trace output.
832 See the ACPICA reference for more information. Lv Zheng.
834 Moved all C library prototypes (used for the local versions of these
835 functions when requested) to a new header, acclib.h
836 Cleaned up the use of non-ANSI C library functions. These functions are
837 implemented locally in ACPICA. Moved all such functions to a common
838 source file, utnonansi.c
840 Debugger: Fixed a problem with the "!!" command (get last command
841 executed) where the debugger could enter an infinite loop and eventually
844 Removed the use of local macros that were used for some of the standard C
845 library functions to automatically cast input parameters. This mostly
846 affected the is* functions where the input parameter is defined to be an
847 int. This required a few modifications to the main ACPICA source code to
848 provide casting for these functions and eliminate possible compiler
849 warnings for these parameters.
851 Across the source code, added additional status/error checking to resolve
852 issues discovered by static source code analysis tools such as Coverity.
854 Example Code and Data Size: These are the sizes for the OS-independent
855 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
856 debug version of the code includes the debug output trace mechanism and
857 has a much larger code and data size.
860 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
861 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
863 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
864 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
867 2) iASL Compiler/Disassembler and Tools:
869 iASL: Fixed a regression where the device map file feature no longer
870 worked properly when used in conjunction with the disassembler. It only
871 worked properly with the compiler itself.
873 iASL: Implemented a new warning for method LocalX variables that are set
874 but never used (similar to a C compiler such as gcc). This also applies
875 to ArgX variables that are not defined by the parent method, and are
876 instead (legally) used as local variables.
878 iASL/Preprocessor: Finished the pass-through of line numbers from the
879 preprocessor to the compiler. This ensures that compiler errors/warnings
880 have the correct original line numbers and filenames, regardless of any
883 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
884 pass-through of comments to the preprocessor output file (which becomes
885 the compiler input file). Also fixed a problem with // comments that
886 appear after a math expression.
888 iASL: Added support for the TCPA server table to the table compiler and
889 template generator. (The client table was already previously supported)
891 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
892 identify the iASL compiler.
894 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
895 multiple times. The new names are ACPI_SIGN_NEGATIVE and
898 AcpiHelp: Update to expand help messages for the iASL preprocessor
902 ----------------------------------------
903 19 June 2015. Summary of changes for version 20150619:
905 Two regressions in version 20150616 have been addressed:
907 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
908 etc.) This update changes ACPICA to only use the standard headers for
909 functions, or the prototypes for the local versions of the C library
910 functions. Across the source code, this required some additional casts
911 for some Clib invocations for portability. Moved all local prototypes to
914 Fixes several problems with recent changes to the handling of the FACS
915 table that could cause some systems not to boot.
918 ----------------------------------------
919 16 June 2015. Summary of changes for version 20150616:
922 1) ACPICA kernel-resident subsystem:
924 Across the entire ACPICA source code base, the various macros for the C
925 library functions (such as ACPI_STRLEN, etc.) have been removed and
926 replaced by the standard C library names (strlen, etc.) The original
927 purpose for these macros is no longer applicable. This simplification
928 reduces the number of macros used in the ACPICA source code
929 significantly, improving readability and maintainability.
931 Implemented support for a new ACPI table, the OSDT. This table, the
932 "override" SDT, can be loaded directly by the host OS at boot time. It
933 enables the replacement of existing namespace objects that were installed
934 via the DSDT and/or SSDTs. The primary purpose for this is to replace
935 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
936 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
939 Added support for systems with (improperly) two FACS tables -- a "32-bit"
940 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
941 X field). This change will support both automatically. There continues to
942 be systems found with this issue. This support requires a change to the
943 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
944 been added to allow the host to select which FACS is desired
945 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
948 Added a new feature to allow for systems that do not contain an FACS.
949 Although this is already supported on hardware-reduced platforms, the
950 feature has been extended for all platforms. The reasoning is that we do
951 not want to abort the entire ACPICA initialization just because the
952 system is seriously buggy and has no FACS.
954 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
955 not correctly transcribed from the ACPI specification in ACPICA version
958 Implemented support for the _CLS object in the AcpiGetObjectInfo external
961 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
962 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
963 compiler also updated. Note: The TCPA "server" table is not supported by
964 the disassembler/table-compiler at this time.
966 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
968 Example Code and Data Size: These are the sizes for the OS-independent
969 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
970 debug version of the code includes the debug output trace mechanism and
971 has a much larger code and data size.
974 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
975 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
977 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
978 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
981 2) iASL Compiler/Disassembler and Tools:
983 Disassembler: Fixed a problem with the new symbolic operator disassembler
984 where incorrect ASL code could be emitted in some cases for the "non-
985 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
986 ShiftRight. The actual problem cases seem to be rather unusual in common
987 ASL code, however. David Box.
989 Modified the linux version of acpidump to obtain ACPI tables from not
990 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
993 iASL: Fixed a problem where the user preprocessor output file (.i)
994 contained extra data that was not expected. The compiler was using this
995 file as a temporary file and passed through #line directives in order to
996 keep compiler error messages in sync with the input file and line number
997 across multiple include files. The (.i) is no longer a temporary file as
998 the compiler uses a new, different file for the original purpose.
1000 iASL: Fixed a problem where comments within the original ASL source code
1001 file were not passed through to the preprocessor output file, nor any
1004 iASL: Fixed some issues for the handling of the "#include" preprocessor
1005 directive and the similar (but not the same) "Include" ASL operator.
1007 iASL: Add support for the new OSDT in both the disassembler and compiler.
1009 iASL: Fixed a problem with the constant folding support where a Buffer
1010 object could be incorrectly generated (incorrectly formed) during a
1011 conversion to a Store() operator.
1013 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
1014 description text for the _REV predefined name. _REV now permanently
1015 returns 2, as per the ACPI 6.0 specification.
1017 Debugger: Enhanced the output of the Debug ASL object for references
1018 produced by the Index operator. For Buffers and strings, only output the
1019 actual byte pointed to by the index. For packages, only print the single
1020 package element decoded by the index. Previously, the entire
1021 buffer/string/package was emitted.
1023 iASL/Table-compiler: Fixed a regression where the "generic" data types
1024 were no longer recognized, causing errors.
1027 ----------------------------------------
1028 15 May 2015. Summary of changes for version 20150515:
1030 This release implements most of ACPI 6.0 as described below.
1032 1) ACPICA kernel-resident subsystem:
1034 Implemented runtime argument checking and return value checking for all
1035 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
1036 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
1038 Example Code and Data Size: These are the sizes for the OS-independent
1039 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1040 debug version of the code includes the debug output trace mechanism and
1041 has a much larger code and data size.
1044 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
1045 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
1047 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
1048 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
1051 2) iASL Compiler/Disassembler and Tools:
1053 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
1054 names (argument count validation and return value typechecking.)
1056 iASL disassembler and table compiler: implemented support for all new
1057 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
1059 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
1062 iASL preprocessor: Added a new directive to enable inclusion of binary
1063 blobs into ASL code. The new directive is #includebuffer. It takes a
1064 binary file as input and emits a named ascii buffer object into the ASL
1067 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
1069 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
1072 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
1076 ----------------------------------------
1077 10 April 2015. Summary of changes for version 20150410:
1079 Reverted a change introduced in version 20150408 that caused
1080 a regression in the disassembler where incorrect operator
1081 symbols could be emitted.
1084 ----------------------------------------
1085 08 April 2015. Summary of changes for version 20150408:
1088 1) ACPICA kernel-resident subsystem:
1090 Permanently set the return value for the _REV predefined name. It now
1091 returns 2 (was 5). This matches other ACPI implementations. _REV will be
1092 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
1093 for ACPI 2.0 and later. It should never be used to differentiate or
1094 identify operating systems.
1096 Added the "Windows 2015" string to the _OSI support. ACPICA will now
1097 return TRUE to a query with this string.
1099 Fixed several issues with the local version of the printf function.
1101 Added the C99 compiler option (-std=c99) to the Unix makefiles.
1104 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
1105 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
1107 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
1108 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
1111 2) iASL Compiler/Disassembler and Tools:
1113 iASL: Implemented an enhancement to the constant folding feature to
1114 transform the parse tree to a simple Store operation whenever possible:
1115 Add (2, 3, X) ==> is converted to: Store (5, X)
1116 X = 2 + 3 ==> is converted to: Store (5, X)
1118 Updated support for the SLIC table (Software Licensing Description Table)
1119 in both the Data Table compiler and the disassembler. The SLIC table
1120 support now conforms to "Microsoft Software Licensing Tables (SLIC and
1121 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
1122 following the ACPI header is now defined to be "Proprietary Data", and as
1123 such, can only be entered or displayed as a hex data block.
1125 Implemented full support for the MSDM table as described in the document
1126 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
1127 following the ACPI header is defined to be "Proprietary Data", and can
1128 only be entered or displayed as a hex data block.
1130 Implemented the -Pn option for the iASL Table Compiler (was only
1131 implemented for the ASL compiler). This option disables the iASL
1134 Disassembler: For disassembly of Data Tables, added a comment field
1135 around the Ascii equivalent data that is emitted as part of the "Raw
1136 Table Data" block. This prevents the iASL Preprocessor from possible
1137 confusion if/when the table is compiled.
1139 Disassembler: Added an option (-df) to force the disassembler to assume
1140 that the table being disassembled contains valid AML. This feature is
1141 useful for disassembling AML files that contain ACPI signatures other
1142 than DSDT or SSDT (such as OEMx or other signatures).
1144 Changes for the EFI version of the tools:
1145 1) Fixed a build error/issue
1146 2) Fixed a cast warning
1148 iASL: Fixed a path issue with the __FILE__ operator by making the
1149 directory prefix optional within the internal SplitInputFilename
1152 Debugger: Removed some unused global variables.
1154 Tests: Updated the makefile for proper generation of the AAPITS suite.
1157 ----------------------------------------
1158 04 February 2015. Summary of changes for version 20150204:
1160 ACPICA kernel-resident subsystem:
1162 Updated all ACPICA copyrights and signons to 2014. Added the 2014
1163 copyright to all module headers and signons, including the standard Linux
1164 header. This affects virtually every file in the ACPICA core subsystem,
1165 iASL compiler, all ACPICA utilities, and the test suites.
1167 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
1168 A raw gpe handling mechanism was created to allow better handling of GPE
1169 storms that aren't easily managed by the normal handler. The raw handler
1170 allows disabling/renabling of the the GPE so that interrupt storms can be
1171 avoided in cases where events cannot be timely serviced. In this
1172 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
1173 GPE. This API will leave the reference counts undisturbed, thereby
1174 preventing unintentional clearing of the GPE when the intent in only to
1175 temporarily disable it. Raw handlers allow enabling and disabling of a
1176 GPE by removing GPE register locking. As such, raw handlers much provide
1177 their own locks while using GPE API's to protect access to GPE data
1181 Events: Always modify GPE registers under the GPE lock.
1182 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
1183 values. Reported as bug by joe.liu@apple.com.
1185 Unix makefiles: Separate option to disable optimizations and
1186 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
1187 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
1188 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
1189 errors when building ACPICA. This allows disabling the option without
1190 also having to disable optimazations.
1194 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
1195 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
1198 --------------------------------------
1199 07 November 2014. Summary of changes for version 20141107:
1201 This release is available at https://acpica.org/downloads
1203 This release introduces and implements language extensions to ASL that
1204 provide support for symbolic ("C-style") operators and expressions. These
1205 language extensions are known collectively as ASL+.
1208 1) iASL Compiler/Disassembler and Tools:
1210 Disassembler: Fixed a problem with disassembly of the UartSerialBus
1211 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
1214 Disassembler: Fixed the Unicode macro support to add escape sequences.
1215 All non-printable ASCII values are emitted as escape sequences, as well
1216 as the standard escapes for quote and backslash. Ensures that the
1217 disassembled macro can be correctly recompiled.
1219 iASL: Added Printf/Fprintf macros for formatted output. These macros are
1220 translated to existing AML Concatenate and Store operations. Printf
1221 writes to the ASL Debug object. Fprintf allows the specification of an
1222 ASL name as the target. Only a single format specifier is required, %o,
1223 since the AML interpreter dynamically converts objects to the required
1226 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
1227 (Concatenate (Concatenate (Concatenate ("", Arg0),
1228 ": Unexpected value for "), Arg1), ", "), Arg2),
1229 " at line "), Arg3), Debug)
1231 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
1232 Arg0, Arg1, Arg2, Arg3)
1234 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
1235 ("", Arg1), ": "), Arg0), " Successful"), STR1)
1237 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
1239 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
1240 ASL parse tree before the AML code is generated. This allows blocks of
1241 ASL code to be removed in order to help locate and identify problem
1242 devices and/or code. David E. Box.
1244 AcpiExec: Added support (-fi) for an optional namespace object
1245 initialization file. This file specifies initial values for namespace
1246 objects as necessary for debugging and testing different ASL code paths
1247 that may be taken as a result of BIOS options.
1250 2) Overview of symbolic operator support for ASL (ASL+)
1251 -------------------------------------------------------
1253 As an extension to the ASL language, iASL implements support for symbolic
1254 (C-style) operators for math and logical expressions. This can greatly
1255 simplify ASL code as well as improve both readability and
1256 maintainability. These language extensions can exist concurrently with
1257 all legacy ASL code and expressions.
1259 The symbolic extensions are 100% compatible with existing AML
1260 interpreters, since no new AML opcodes are created. To implement the
1261 extensions, the iASL compiler transforms the symbolic expressions into
1262 the legacy ASL/AML equivalents at compile time.
1264 Full symbolic expressions are supported, along with the standard C
1265 precedence and associativity rules.
1267 Full disassembler support for the symbolic expressions is provided, and
1268 creates an automatic migration path for existing ASL code to ASL+ code
1269 via the disassembly process. By default, the disassembler now emits ASL+
1270 code with symbolic expressions. An option (-dl) is provided to force the
1271 disassembler to emit legacy ASL code if desired.
1273 Below is the complete list of the currently supported symbolic operators
1274 with examples. See the iASL User Guide for additional information.
1277 ASL+ Syntax Legacy ASL Equivalent
1278 ----------- ---------------------
1282 Z = X + Y Add (X, Y, Z)
1283 Z = X - Y Subtract (X, Y, Z)
1284 Z = X * Y Multiply (X, Y, Z)
1285 Z = X / Y Divide (X, Y, , Z)
1286 Z = X % Y Mod (X, Y, Z)
1287 Z = X << Y ShiftLeft (X, Y, Z)
1288 Z = X >> Y ShiftRight (X, Y, Z)
1289 Z = X & Y And (X, Y, Z)
1290 Z = X | Y Or (X, Y, Z)
1291 Z = X ^ Y Xor (X, Y, Z)
1296 // Logical operators
1298 (X == Y) LEqual (X, Y)
1299 (X != Y) LNotEqual (X, Y)
1300 (X < Y) LLess (X, Y)
1301 (X > Y) LGreater (X, Y)
1302 (X <= Y) LLessEqual (X, Y)
1303 (X >= Y) LGreaterEqual (X, Y)
1304 (X && Y) LAnd (X, Y)
1308 // Assignment and compound assignment operations
1311 X += Y Add (X, Y, X)
1312 X -= Y Subtract (X, Y, X)
1313 X *= Y Multiply (X, Y, X)
1314 X /= Y Divide (X, Y, , X)
1315 X %= Y Mod (X, Y, X)
1316 X <<= Y ShiftLeft (X, Y, X)
1317 X >>= Y ShiftRight (X, Y, X)
1318 X &= Y And (X, Y, X)
1320 X ^= Y Xor (X, Y, X)
1327 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
1328 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
1330 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
1332 And (MEMB, 0xFFFFFFF0, SRMB)
1333 Store (MEMB, Local2)
1334 Store (PDBM, Local1)
1335 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
1337 Or (PDBM, 0x02, PDBM)
1341 If (((R510 & 0x03FB) == 0x02E0) ||
1342 ((R520 & 0x03FB) == 0x02E0) ||
1343 ((R530 & 0x03FB) == 0x02E0) ||
1344 ((R540 & 0x03FB) == 0x02E0))
1346 SRMB = (MEMB & 0xFFFFFFF0)
1349 PDBM &= 0xFFFFFFFFFFFFFFF9
1355 Store (0x1234, Local1)
1356 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
1357 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
1358 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
1359 Store (Index (PKG1, 0x03), Local6)
1360 Store (Add (Local3, Local2), Debug)
1361 Add (Local1, 0x0F, Local2)
1362 Add (Local1, Multiply (Local2, Local3), Local2)
1363 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
1367 Local3 = (((Local1 + TEST) + 0x20) * Local2)
1368 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
1369 Local3 = (Local1 + (TEST + (0x20 * Local2)))
1370 Local6 = Index (PKG1, 0x03)
1371 Debug = (Local3 + Local2)
1372 Local2 = (Local1 + 0x0F)
1373 Local2 = (Local1 + (Local2 * Local3))
1374 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
1377 ----------------------------------------
1378 26 September 2014. Summary of changes for version 20140926:
1380 1) ACPICA kernel-resident subsystem:
1382 Updated the GPIO operation region handler interface (GeneralPurposeIo).
1383 In order to support GPIO Connection objects with multiple pins, along
1384 with the related Field objects, the following changes to the interface
1385 have been made: The Address is now defined to be the offset in bits of
1386 the field unit from the previous invocation of a Connection. It can be
1387 viewed as a "Pin Number Index" into the connection resource descriptor.
1388 The BitWidth is the exact bit width of the field. It is usually one bit,
1389 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
1390 additional information and examples.
1392 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
1393 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
1394 by the firmware), so that they cannot fire until they are enabled via
1395 AcpiUpdateAllGpes. Rafael J. Wysocki.
1397 Added a new return flag for the Event/GPE status interfaces --
1398 AcpiGetEventStatus and AcpiGetGpeStatus. The new
1399 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
1400 GPE currently has a handler associated with it, and can thus actually
1401 affect the system. Lv Zheng.
1403 Example Code and Data Size: These are the sizes for the OS-independent
1404 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1405 debug version of the code includes the debug output trace mechanism and
1406 has a much larger code and data size.
1409 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
1410 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
1412 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
1413 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
1415 2) iASL Compiler/Disassembler and Tools:
1417 iASL: Fixed a memory allocation/free regression introduced in 20140828
1418 that could cause the compiler to crash. This was introduced inadvertently
1419 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
1422 iASL: Removed two error messages that have been found to create false
1423 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
1424 1) Illegal forward reference within a method
1425 2) Illegal reference across two methods
1427 iASL: Implemented a new option (-lm) to create a hardware mapping file
1428 that summarizes all GPIO, I2C, SPI, and UART connections. This option
1429 works for both the compiler and disassembler. See the iASL compiler user
1430 guide for additional information and examples (section 6.4.6).
1432 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
1433 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
1434 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
1436 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
1437 unless STDIN is actually a terminal. Assists with batch-mode processing.
1440 Disassembler/AcpiHelp: Added another large group of recognized _HID
1444 ----------------------------------------
1445 28 August 2014. Summary of changes for version 20140828:
1447 1) ACPICA kernel-resident subsystem:
1449 Fixed a problem related to the internal use of the Timer() operator where
1450 a 64-bit divide could cause an attempted link to a double-precision math
1451 library. This divide is not actually necessary, so the code was
1452 restructured to eliminate it. Lv Zheng.
1454 ACPI 5.1: Added support for the runtime validation of the _DSD package
1455 (similar to the iASL support).
1457 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
1458 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
1460 Example Code and Data Size: These are the sizes for the OS-independent
1461 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1462 debug version of the code includes the debug output trace mechanism and
1463 has a much larger code and data size.
1466 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
1467 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
1469 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
1470 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
1472 2) iASL Compiler/Disassembler and Tools:
1474 AcpiExec: Fixed a problem on unix systems where the original terminal
1475 state was not always properly restored upon exit. Seen when using the -v
1476 option. ACPICA BZ 1104.
1478 iASL: Fixed a problem with the validation of the ranges/length within the
1479 Memory24 resource descriptor. There was a boundary condition when the
1480 range was equal to the (length -1) caused by the fact that these values
1481 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
1483 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
1485 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
1487 now supported properly.
1489 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
1490 in the disassembler, data table compiler, and table template generator.
1492 iASL: Added a requirement for Device() objects that one of either a _HID
1493 or _ADR must exist within the scope of a Device, as per the ACPI
1494 specification. Remove a similar requirement that was incorrectly in place
1495 for the _DSD object.
1497 iASL: Added error detection for illegal named references within control
1498 methods that would cause runtime failures. Now trapped as errors are: 1)
1499 References to objects within a non-parent control method. 2) Forward
1500 references (within a method) -- for control methods, AML interpreters use
1501 a one-pass parse of control methods. ACPICA BZ 1008.
1503 iASL: Added error checking for dependencies related to the _PSx power
1504 methods. ACPICA BZ 1029.
1505 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
1507 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
1510 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
1511 deploying the existing object and string caches and adding new caches for
1514 iASL: Split the huge parser source file into multiple subfiles to improve
1515 manageability. Generation now requires the M4 macro preprocessor, which
1516 is part of the Bison distribution on both unix and windows platforms.
1518 AcpiSrc: Fixed and removed all extraneous warnings generated during
1519 entire ACPICA source code scan and/or conversion.
1522 ----------------------------------------
1524 24 July 2014. Summary of changes for version 20140724:
1526 The ACPI 5.1 specification has been released and is available at:
1527 http://uefi.org/specs/access
1530 0) ACPI 5.1 support in ACPICA:
1532 ACPI 5.1 is fully supported in ACPICA as of this release.
1534 New predefined names. Support includes iASL and runtime ACPICA
1536 _CCA (Cache Coherency Attribute).
1537 _DSD (Device-Specific Data). David Box.
1539 Modifications to existing ACPI tables. Support includes headers, iASL
1540 Data Table compiler, disassembler, and the template generator.
1541 FADT - New fields and flags. Graeme Gregory.
1542 GTDT - One new subtable and new fields. Tomasz Nowicki.
1543 MADT - Two new subtables. Tomasz Nowicki.
1544 PCCT - One new subtable.
1547 New notification type for System Resource Affinity change events.
1550 1) ACPICA kernel-resident subsystem:
1552 Fixed a regression introduced in 20140627 where a fault can happen during
1553 the deletion of Alias AML namespace objects. The problem affected both
1554 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
1556 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
1557 simple mechanism to enable wake GPEs that have no associated handler or
1558 control method. Rafael Wysocki.
1560 Updated the AcpiEnableGpe interface to disallow the enable if there is no
1561 handler or control method associated with the particular GPE. This will
1562 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
1564 Updated GPE handling and dispatch by disabling the GPE before clearing
1565 the status bit for edge-triggered GPEs. Lv Zheng.
1567 Added Timer() support to the AML Debug object. The current timer value is
1568 now displayed with each invocation of (Store to) the debug object to
1569 enable simple generation of execution times for AML code (method
1570 execution for example.) ACPICA BZ 1093.
1572 Example Code and Data Size: These are the sizes for the OS-independent
1573 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1574 debug version of the code includes the debug output trace mechanism and
1575 has a much larger code and data size.
1578 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
1579 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
1581 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
1582 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
1585 2) iASL Compiler/Disassembler and Tools:
1587 Fixed an issue with the recently added local printf implementation,
1588 concerning width/precision specifiers that could cause incorrect output.
1589 Lv Zheng. ACPICA BZ 1094.
1591 Disassembler: Added support to detect buffers that contain UUIDs and
1592 disassemble them to an invocation of the ToUUID operator. Also emit
1593 commented descriptions of known ACPI-related UUIDs.
1595 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
1596 -u. Adds three new files.
1598 iASL: Update table compiler and disassembler for DMAR table changes that
1599 were introduced in September 2013. With assistance by David Woodhouse.
1601 ----------------------------------------
1602 27 June 2014. Summary of changes for version 20140627:
1604 1) ACPICA kernel-resident subsystem:
1606 Formatted Output: Implemented local versions of standard formatted output
1607 utilities such as printf, etc. Over time, it has been discovered that
1608 there are in fact many portability issues with printf, and the addition
1609 of this feature will fix/prevent these issues once and for all. Some
1610 known issues are summarized below:
1612 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
1613 for the Linux kernel and is %uI64 for some MSVC versions.
1614 2) Invoking printf consistently in a manner that is portable across both
1615 32-bit and 64-bit platforms is difficult at best in many situations.
1616 3) The output format for pointers varies from system to system (leading
1617 zeros especially), and leads to inconsistent output from ACPICA across
1619 4) Certain platform-specific printf formats may conflict with ACPICA use.
1620 5) If there is no local C library available, ACPICA now has local support
1623 -- To address these printf issues in a complete manner, ACPICA now
1624 directly implements a small subset of printf format specifiers, only
1625 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
1627 Implemented support for ACPICA generation within the EFI environment.
1628 Initially, the AcpiDump utility is supported in the UEFI shell
1629 environment. Lv Zheng.
1631 Added a new external interface, AcpiLogError, to improve ACPICA
1632 portability. This allows the host to redirect error messages from the
1633 ACPICA utilities. Lv Zheng.
1635 Added and deployed new OSL file I/O interfaces to improve ACPICA
1643 There are C library implementations of these functions in the new file
1644 service_layers/oslibcfs.c -- however, the functions can be implemented by
1645 the local host in any way necessary. Lv Zheng.
1647 Implemented a mechanism to disable/enable ACPI table checksum validation
1648 at runtime. This can be useful when loading tables very early during OS
1649 initialization when it may not be possible to map the entire table in
1650 order to compute the checksum. Lv Zheng.
1652 Fixed a buffer allocation issue for the Generic Serial Bus support.
1653 Originally, a fixed buffer length was used. This change allows for
1654 variable-length buffers based upon the protocol indicated by the field
1655 access attributes. Reported by Lan Tianyu. Lv Zheng.
1657 Fixed a problem where an object detached from a namespace node was not
1658 properly terminated/cleared and could cause a circular list problem if
1659 reattached. ACPICA BZ 1063. David Box.
1661 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
1663 Fixed a possible memory leak in an error return path within the function
1664 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
1666 Example Code and Data Size: These are the sizes for the OS-independent
1667 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1668 debug version of the code includes the debug output trace mechanism and
1669 has a much larger code and data size.
1672 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
1673 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
1675 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
1676 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
1679 2) iASL Compiler/Disassembler and Tools:
1681 Disassembler: Add dump of ASCII equivalent text within a comment at the
1682 end of each line of the output for the Buffer() ASL operator.
1684 AcpiDump: Miscellaneous changes:
1685 Fixed repetitive table dump in -n mode.
1686 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
1687 the ACPI 2.0 GUID fails.
1689 iASL: Fixed a problem where the compiler could fault if incorrectly given
1690 an acpidump output file as input. ACPICA BZ 1088. David Box.
1692 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
1693 they are invoked without any arguments.
1695 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
1696 1086. Colin Ian King.
1698 Disassembler: Cleaned up a block of code that extracts a parent Op
1699 object. Added a comment that explains that the parent is guaranteed to be
1700 valid in this case. ACPICA BZ 1069.
1703 ----------------------------------------
1704 24 April 2014. Summary of changes for version 20140424:
1706 1) ACPICA kernel-resident subsystem:
1708 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
1709 Some of these tables are known to contain a trailing NULL entry. Lv
1712 Removed an extraneous error message for the case where there are a large
1713 number of system GPEs (> 124). This was the "32-bit FADT register is too
1714 long to convert to GAS struct" message, which is irrelevant for GPEs
1715 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
1716 (limited capacity) GAS bit length. Also, several changes to ensure proper
1717 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
1720 Implemented and deployed additional configuration support for the public
1721 ACPICA external interfaces. Entire classes of interfaces can now be
1722 easily modified or configured out, replaced by stubbed inline functions
1723 by default. Lv Zheng.
1725 Moved all public ACPICA runtime configuration globals to the public
1726 ACPICA external interface file for convenience. Also, removed some
1727 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
1729 Documentation: Added a new section to the ACPICA reference describing the
1730 maximum number of GPEs that can be supported by the FADT-defined GPEs in
1731 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
1734 Example Code and Data Size: These are the sizes for the OS-independent
1735 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1736 debug version of the code includes the debug output trace mechanism and
1737 has a much larger code and data size.
1740 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
1741 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
1743 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
1744 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
1747 2) iASL Compiler/Disassembler and Tools:
1749 iASL and disassembler: Add full support for the LPIT table (Low Power
1750 Idle Table). Includes support in the disassembler, data table compiler,
1751 and template generator.
1754 1) Add option to force the use of the RSDT (over the XSDT).
1755 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
1757 iASL: Add check for predefined packages that are too large. For
1758 predefined names that contain subpackages, check if each subpackage is
1759 too large. (Check for too small already exists.)
1761 Debugger: Updated the GPE command (which simulates a GPE by executing the
1762 GPE code paths in ACPICA). The GPE device is now optional, and defaults
1763 to the GPE 0/1 FADT-defined blocks.
1765 Unix application OSL: Update line-editing support. Add additional error
1766 checking and take care not to reset terminal attributes on exit if they
1767 were never set. This should help guarantee that the terminal is always
1768 left in the previous state on program exit.
1771 ----------------------------------------
1772 25 March 2014. Summary of changes for version 20140325:
1774 1) ACPICA kernel-resident subsystem:
1776 Updated the auto-serialize feature for control methods. This feature
1777 automatically serializes all methods that create named objects in order
1778 to prevent runtime errors. The update adds support to ignore the
1779 currently executing AML SyncLevel when invoking such a method, in order
1780 to prevent disruption of any existing SyncLevel priorities that may exist
1781 in the AML code. Although the use of SyncLevels is relatively rare, this
1782 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
1783 appear on some machines starting with the 20140214 release.
1785 Added a new external interface to allow the host to install ACPI tables
1786 very early, before the namespace is even created. AcpiInstallTable gives
1787 the host additional flexibility for ACPI table management. Tables can be
1788 installed directly by the host as if they had originally appeared in the
1789 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
1790 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
1791 with additional internal restructuring and cleanup. See the ACPICA
1792 Reference for interface details. Lv Zheng.
1794 Added validation of the checksum for all incoming dynamically loaded
1795 tables (via external interfaces or via AML Load/LoadTable operators). Lv
1798 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
1799 and GPE handler removal. Restructured calls to eliminate possible race
1800 conditions. Lv Zheng.
1802 Added a warning for the use/execution of the ASL/AML Unload (table)
1803 operator. This will help detect and identify machines that use this
1804 operator if and when it is ever used. This operator has never been seen
1805 in the field and the usage model and possible side-effects of the drastic
1806 runtime action of a full table removal are unknown.
1808 Reverted the use of #pragma push/pop which was introduced in the 20140214
1809 release. It appears that push and pop are not implemented by enough
1810 compilers to make the use of this feature feasible for ACPICA at this
1811 time. However, these operators may be deployed in a future ACPICA
1814 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
1817 Source code generation:
1818 1) Disabled the use of the "strchr" macro for the gcc-specific
1819 generation. For some versions of gcc, this macro can periodically expose
1820 a compiler bug which in turn causes compile-time error(s).
1821 2) Added support for PPC64 compilation. Colin Ian King.
1823 Example Code and Data Size: These are the sizes for the OS-independent
1824 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1825 debug version of the code includes the debug output trace mechanism and
1826 has a much larger code and data size.
1829 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
1830 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
1832 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
1833 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
1836 2) iASL Compiler/Disassembler and Tools:
1838 Disassembler: Added several new features to improve the readability of
1839 the resulting ASL code. Extra information is emitted within comment
1840 fields in the ASL code:
1841 1) Known _HID/_CID values are decoded to descriptive text.
1842 2) Standard values for the Notify() operator are decoded to descriptive
1844 3) Target operands are expanded to full pathnames (in a comment) when
1847 Disassembler: Miscellaneous updates for extern() handling:
1848 1) Abort compiler if file specified by -fe option does not exist.
1849 2) Silence unnecessary warnings about argument count mismatches.
1850 3) Update warning messages concerning unresolved method externals.
1851 4) Emit "UnknownObj" keyword for externals whose type cannot be
1855 1) Added the -a option to display both the ASL syntax and the AML
1856 encoding for an input ASL operator. This effectively displays all known
1857 information about an ASL operator with one AcpiHelp invocation.
1858 2) Added substring match support (similar to a wildcard) for the -i
1859 (_HID/PNP IDs) option.
1861 iASL/Disassembler: Since this tool does not yet support execution on big-
1862 endian machines, added detection of endianness and an error message if
1863 execution is attempted on big-endian. Support for big-endian within iASL
1864 is a feature that is on the ACPICA to-be-done list.
1867 1) Remove option to extract binary files from an acpidump; this function
1868 is made obsolete by the AcpiXtract utility.
1869 2) General cleanup of open files and allocated buffers.
1872 ----------------------------------------
1873 14 February 2014. Summary of changes for version 20140214:
1875 1) ACPICA kernel-resident subsystem:
1877 Implemented a new mechanism to proactively prevent problems with ill-
1878 behaved reentrant control methods that create named ACPI objects. This
1879 behavior is illegal as per the ACPI specification, but is nonetheless
1880 frequently seen in the field. Previously, this could lead to an
1881 AE_ALREADY_EXISTS exception if the method was actually entered by more
1882 than one thread. This new mechanism detects such methods at table load
1883 time and marks them "serialized" to prevent reentrancy. A new global
1884 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
1885 feature if desired. This mechanism and global option obsoletes and
1886 supersedes the previous AcpiGbl_SerializeAllMethods option.
1888 Added the "Windows 2013" string to the _OSI support. ACPICA will now
1889 respond TRUE to _OSI queries with this string. It is the stated policy of
1890 ACPICA to add new strings to the _OSI support as soon as possible after
1891 they are defined. See the full ACPICA _OSI policy which has been added to
1892 the utilities/utosi.c file.
1894 Hardened/updated the _PRT return value auto-repair code:
1895 1) Do not abort the repair on a single subpackage failure, continue to
1896 check all subpackages.
1897 2) Add check for the minimum subpackage length (4).
1898 3) Properly handle extraneous NULL package elements.
1900 Added support to avoid the possibility of infinite loops when traversing
1901 object linked lists. Never allow an infinite loop, even in the face of
1902 corrupted object lists.
1904 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
1905 pack(pop) directives to ensure that the ACPICA headers are independent of
1906 compiler settings or other host headers.
1908 Example Code and Data Size: These are the sizes for the OS-independent
1909 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1910 debug version of the code includes the debug output trace mechanism and
1911 has a much larger code and data size.
1914 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
1915 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
1917 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
1918 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
1921 2) iASL Compiler/Disassembler and Tools:
1923 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
1924 first reserved field was incorrectly forced to have a value of zero. This
1925 change correctly forces the field to have a value of one. ACPICA BZ 1081.
1927 Debugger: Added missing support for the "Extra" and "Data" subobjects
1928 when displaying object data.
1930 Debugger: Added support to display entire object linked lists when
1931 displaying object data.
1933 iASL: Removed the obsolete -g option to obtain ACPI tables from the
1934 Windows registry. This feature has been superseded by the acpidump
1938 ----------------------------------------
1939 14 January 2014. Summary of changes for version 20140114:
1941 1) ACPICA kernel-resident subsystem:
1943 Updated all ACPICA copyrights and signons to 2014. Added the 2014
1944 copyright to all module headers and signons, including the standard Linux
1945 header. This affects virtually every file in the ACPICA core subsystem,
1946 iASL compiler, all ACPICA utilities, and the test suites.
1948 Improved parameter validation for AcpiInstallGpeBlock. Added the
1950 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
1951 2) There is not already a GPE block attached to the device.
1952 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
1955 Correctly support "references" in the ACPI_OBJECT. This change fixes the
1956 support to allow references (namespace nodes) to be passed as arguments
1957 to control methods via the evaluate object interface. This is probably
1958 most useful for testing purposes, however.
1960 Improved support for 32/64 bit physical addresses in printf()-like
1961 output. This change improves the support for physical addresses in printf
1962 debug statements and other output on both 32-bit and 64-bit hosts. It
1963 consistently outputs the appropriate number of bytes for each host. The
1964 %p specifier is unsatisfactory since it does not emit uniform output on
1965 all hosts/clib implementations (on some, leading zeros are not supported,
1966 leading to difficult-to-read output).
1968 Example Code and Data Size: These are the sizes for the OS-independent
1969 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1970 debug version of the code includes the debug output trace mechanism and
1971 has a much larger code and data size.
1974 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
1975 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
1977 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
1978 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
1981 2) iASL Compiler/Disassembler and Tools:
1983 iASL: Fix a possible fault when using the Connection() operator. Fixes a
1984 problem if the parent Field definition for the Connection operator refers
1985 to an operation region that does not exist. ACPICA BZ 1064.
1987 AcpiExec: Load of local test tables is now optional. The utility has the
1988 capability to load some various tables to test features of ACPICA.
1989 However, there are enough of them that the output of the utility became
1990 confusing. With this change, only the required local tables are displayed
1991 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
1992 line specification. This makes the default output simler and easier to
1993 understand. The -el command line option restores the original behavior
1994 for testing purposes.
1996 AcpiExec: Added support for overlapping operation regions. This change
1997 expands the simulation of operation regions by supporting regions that
1998 overlap within the given address space. Supports SystemMemory and
1999 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
2001 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
2002 allows AcpiExec to simulate these address spaces, similar to the current
2003 support for SystemMemory and SystemIO.
2005 Debugger: Added new command to read/write/compare all namespace objects.
2006 The command "test objects" will exercise the entire namespace by writing
2007 new values to each data object, and ensuring that the write was
2008 successful. The original value is then restored and verified.
2010 Debugger: Added the "test predefined" command. This change makes this
2011 test public and puts it under the new "test" command. The test executes
2012 each and every predefined name within the current namespace.
2015 ----------------------------------------
2016 18 December 2013. Summary of changes for version 20131218:
2018 Global note: The ACPI 5.0A specification was released this month. There
2019 are no changes needed for ACPICA since this release of ACPI is an
2020 errata/clarification release. The specification is available at
2024 1) ACPICA kernel-resident subsystem:
2026 Added validation of the XSDT root table if it is present. Some older
2027 platforms contain an XSDT that is ill-formed or otherwise invalid (such
2028 as containing some or all entries that are NULL pointers). This change
2029 adds a new function to validate the XSDT before actually using it. If the
2030 XSDT is found to be invalid, ACPICA will now automatically fall back to
2031 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
2032 ACPICA and enhanced by Lv Zheng and Bob Moore.
2034 Added a runtime option to ignore the XSDT and force the use of the RSDT.
2035 This change adds a runtime option that will force ACPICA to use the RSDT
2036 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
2037 requires that an XSDT be used instead of the RSDT, the XSDT has been
2038 found to be corrupt or ill-formed on some machines. Lv Zheng.
2040 Added a runtime option to favor 32-bit FADT register addresses over the
2041 64-bit addresses. This change adds an option to favor 32-bit FADT
2042 addresses when there is a conflict between the 32-bit and 64-bit versions
2043 of the same register. The default behavior is to use the 64-bit version
2044 in accordance with the ACPI specification. This can now be overridden via
2045 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
2047 During the change above, the internal "Convert FADT" and "Verify FADT"
2048 functions have been merged to simplify the code, making it easier to
2049 understand and maintain. ACPICA BZ 933.
2051 Improve exception reporting and handling for GPE block installation.
2052 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
2053 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
2055 Added helper macros to extract bus/segment numbers from the HEST table.
2056 This change adds two macros to extract the encoded bus and segment
2057 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
2058 Betty Dall <betty.dall@hp.com>
2060 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
2061 by ACPICA. It is not a public macro, so it should have no effect on
2062 existing OSV code. Lv Zheng.
2064 Example Code and Data Size: These are the sizes for the OS-independent
2065 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2066 debug version of the code includes the debug output trace mechanism and
2067 has a much larger code and data size.
2070 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
2071 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
2073 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
2074 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
2077 2) iASL Compiler/Disassembler and Tools:
2079 Disassembler: Improved pathname support for emitted External()
2080 statements. This change adds full pathname support for external names
2081 that have been resolved internally by the inclusion of additional ACPI
2082 tables (via the iASL -e option). Without this change, the disassembler
2083 can emit multiple externals for the same object, or it become confused
2084 when the Scope() operator is used on an external object. Overall, greatly
2085 improves the ability to actually recompile the emitted ASL code when
2086 objects a referenced across multiple ACPI tables. Reported by Michael
2087 Tsirkin (mst@redhat.com).
2089 Tests/ASLTS: Updated functional control suite to execute with no errors.
2090 David Box. Fixed several errors related to the testing of the interpreter
2091 slack mode. Lv Zheng.
2093 iASL: Added support to detect names that are declared within a control
2094 method, but are unused (these are temporary names that are only valid
2095 during the time the method is executing). A remark is issued for these
2096 cases. ACPICA BZ 1022.
2098 iASL: Added full support for the DBG2 table. Adds full disassembler,
2099 table compiler, and template generator support for the DBG2 table (Debug
2102 iASL: Added full support for the PCCT table, update the table definition.
2103 Updates the PCCT table definition in the actbl3.h header and adds table
2104 compiler and template generator support.
2106 iASL: Added an option to emit only error messages (no warnings/remarks).
2107 The -ve option will enable only error messages, warnings and remarks are
2108 suppressed. This can simplify debugging when only the errors are
2109 important, such as when an ACPI table is disassembled and there are many
2110 warnings and remarks -- but only the actual errors are of real interest.
2112 Example ACPICA code (source/tools/examples): Updated the example code so
2113 that it builds to an actual working program, not just example code. Added
2114 ACPI tables and execution of an example control method in the DSDT. Added
2115 makefile support for Unix generation.
2118 ----------------------------------------
2119 15 November 2013. Summary of changes for version 20131115:
2121 This release is available at https://acpica.org/downloads
2124 1) ACPICA kernel-resident subsystem:
2126 Resource Manager: Fixed loop termination for the "get AML length"
2127 function. The loop previously had an error termination on a NULL resource
2128 pointer, which can never happen since the loop simply increments a valid
2129 resource pointer. This fix changes the loop to terminate with an error on
2130 an invalid end-of-buffer condition. The problem can be seen as an
2131 infinite loop by callers to AcpiSetCurrentResources with an invalid or
2132 corrupted resource descriptor, or a resource descriptor that is missing
2133 an END_TAG descriptor. Reported by Dan Carpenter
2134 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
2136 Table unload and ACPICA termination: Delete all attached data objects
2137 during namespace node deletion. This fix updates namespace node deletion
2138 to delete the entire list of attached objects (attached via
2139 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
2140 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
2142 ACPICA termination: Added support to delete all objects attached to the
2143 root namespace node. This fix deletes any and all objects that have been
2144 attached to the root node via AcpiAttachData. Previously, none of these
2145 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
2147 Debug output: Do not emit the function nesting level for the in-kernel
2148 build. The nesting level is really only useful during a single-thread
2149 execution. Therefore, only enable this output for the AcpiExec utility.
2150 Also, only emit the thread ID when executing under AcpiExec (Context
2151 switches are still always detected and a message is emitted). ACPICA BZ
2154 Example Code and Data Size: These are the sizes for the OS-independent
2155 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2156 debug version of the code includes the debug output trace mechanism and
2157 has a much larger code and data size.
2160 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
2161 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
2163 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
2164 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
2167 2) iASL Compiler/Disassembler and Tools:
2169 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
2170 correct portable POSIX header for terminal control functions.
2172 Disassembler: Fixed control method invocation issues related to the use
2173 of the CondRefOf() operator. The problem is seen in the disassembly where
2174 control method invocations may not be disassembled properly if the
2175 control method name has been used previously as an argument to CondRefOf.
2176 The solution is to not attempt to emit an external declaration for the
2177 CondRefOf target (it is not necessary in the first place). This prevents
2178 disassembler object type confusion. ACPICA BZ 988.
2180 Unix Makefiles: Added an option to disable compiler optimizations and the
2181 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
2182 with optimizations (reportedly, gcc 4.4 for example). This change adds a
2183 command line option for make (NOOPT) that disables all compiler
2184 optimizations and the _FORTIFY_SOURCE compiler flag. The default
2185 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
2186 1034. Lv Zheng, Bob Moore.
2188 Tests/ASLTS: Added options to specify individual test cases and modes.
2189 This allows testers running aslts.sh to optionally specify individual
2190 test modes and test cases. Also added an option to disable the forced
2191 generation of the ACPICA tools from source if desired. Lv Zheng.
2193 ----------------------------------------
2194 27 September 2013. Summary of changes for version 20130927:
2196 This release is available at https://acpica.org/downloads
2199 1) ACPICA kernel-resident subsystem:
2201 Fixed a problem with store operations to reference objects. This change
2202 fixes a problem where a Store operation to an ArgX object that contained
2204 reference to a field object did not complete the automatic dereference
2206 then write to the actual field object. Instead, the object type of the
2207 field object was inadvertently changed to match the type of the source
2208 operand. The new behavior will actually write to the field object (buffer
2209 field or field unit), thus matching the correct ACPI-defined behavior.
2211 Implemented support to allow the host to redefine individual OSL
2212 prototypes. This change enables the host to redefine OSL prototypes found
2213 in the acpiosxf.h file. This allows the host to implement OSL interfaces
2214 with a macro or inlined function. Further, it allows the host to add any
2215 additional required modifiers such as __iomem, __init, __exit, etc., as
2216 necessary on a per-interface basis. Enables maximum flexibility for the
2217 OSL interfaces. Lv Zheng.
2219 Hardcoded the access width for the FADT-defined reset register. The ACPI
2220 specification requires the reset register width to be 8 bits. ACPICA now
2221 hardcodes the width to 8 and ignores the FADT width value. This provides
2222 compatibility with other ACPI implementations that have allowed BIOS code
2223 with bad register width values to go unnoticed. Matthew Garett, Bob
2227 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
2229 in the OSL header (acpiosxf). The change modifies the position of this
2230 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
2231 build issues if the OSL defines the implementation of the interface to be
2232 an inline stub function. Lv Zheng.
2234 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
2235 initialization interfaces. This change adds a new macro for the main init
2236 and terminate external interfaces in order to support hosts that require
2237 additional or different processing for these functions. Changed from
2238 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
2241 Cleaned up the memory allocation macros for configurability. In the
2243 case, the ACPI_ALLOCATE and related macros now resolve directly to their
2244 respective AcpiOs* OSL interfaces. Two options:
2245 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
2246 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
2247 2) For AcpiExec (and for debugging), the macros can optionally be
2249 to the local ACPICA interfaces that track each allocation (local tracking
2250 is used to immediately detect memory leaks).
2253 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
2254 to predefine this macro to either TRUE or FALSE during the system build.
2256 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
2258 Example Code and Data Size: These are the sizes for the OS-independent
2259 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2260 debug version of the code includes the debug output trace mechanism and
2261 has a much larger code and data size.
2264 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
2265 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
2267 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
2268 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
2271 2) iASL Compiler/Disassembler and Tools:
2273 iASL: Implemented wildcard support for the -e option. This simplifies use
2274 when there are many SSDTs that must be included to resolve external
2276 declarations. ACPICA BZ 1041. Example:
2277 iasl -e ssdt*.dat -d dsdt.dat
2279 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
2280 adds a portable module that implements full history and limited line
2281 editing for Unix and Linux systems. It does not use readline() due to
2282 portability issues. Instead it uses the POSIX termio interface to put the
2283 terminal in raw input mode so that the various special keys can be
2285 (such as up/down-arrow for history support and left/right-arrow for line
2286 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
2288 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
2289 one or more spaces. This provides compatible with early or different
2290 versions of the AcpiDump utility. ACPICA BZ 1044.
2292 AcpiDump: Do not ignore tables that contain only an ACPI table header.
2293 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
2294 no other data. This change adds support to dump these tables. Any tables
2295 shorter than the length of an ACPI table header remain in error (an error
2296 message is emitted). Reported by Yi Li.
2298 Debugger: Echo actual command along with the "unknown command" message.
2300 ----------------------------------------
2301 23 August 2013. Summary of changes for version 20130823:
2303 1) ACPICA kernel-resident subsystem:
2305 Implemented support for host-installed System Control Interrupt (SCI)
2306 handlers. Certain ACPI functionality requires the host to handle raw
2307 SCIs. For example, the "SCI Doorbell" that is defined for memory power
2308 state support requires the host device driver to handle SCIs to examine
2309 if the doorbell has been activated. Multiple SCI handlers can be
2310 installed to allow for future expansion. New external interfaces are
2311 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
2312 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
2314 Operation region support: Never locally free the handler "context"
2315 pointer. This change removes some dangerous code that attempts to free
2316 the handler context pointer in some (rare) circumstances. The owner of
2317 the handler owns this pointer and the ACPICA code should never touch it.
2318 Although not seen to be an issue in any kernel, it did show up as a
2319 problem (fault) under AcpiExec. Also, set the internal storage field for
2320 the context pointer to zero when the region is deactivated, simply for
2321 sanity. David Box. ACPICA BZ 1039.
2323 AcpiRead: On error, do not modify the return value target location. If an
2324 error happens in the middle of a split 32/32 64-bit I/O operation, do not
2325 modify the target of the return value pointer. Makes the code consistent
2326 with the rest of ACPICA. Bjorn Helgaas.
2328 Example Code and Data Size: These are the sizes for the OS-independent
2329 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2330 debug version of the code includes the debug output trace mechanism and
2331 has a much larger code and data size.
2334 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
2335 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
2337 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
2338 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
2341 2) iASL Compiler/Disassembler and Tools:
2343 AcpiDump: Implemented several new features and fixed some problems:
2344 1) Added support to dump the RSDP, RSDT, and XSDT tables.
2345 2) Added support for multiple table instances (SSDT, UEFI).
2346 3) Added option to dump "customized" (overridden) tables (-c).
2347 4) Fixed a problem where some table filenames were improperly
2349 5) Improved some error messages, removed some unnecessary messages.
2351 iASL: Implemented additional support for disassembly of ACPI tables that
2352 contain invocations of external control methods. The -fe<file> option
2353 allows the import of a file that specifies the external methods along
2354 with the required number of arguments for each -- allowing for the
2355 correct disassembly of the table. This is a workaround for a limitation
2356 of AML code where the disassembler often cannot determine the number of
2357 arguments required for an external control method and generates incorrect
2358 ASL code. See the iASL reference for details. ACPICA BZ 1030.
2360 Debugger: Implemented a new command (paths) that displays the full
2361 pathnames (namepaths) and object types of all objects in the namespace.
2362 This is an alternative to the namespace command.
2364 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
2365 mechanism and any installed handlers.
2367 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
2368 This can occur if there are too many parent prefixes in a namepath (for
2369 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
2371 Application OSLs: Set the return value for the PCI read functions. These
2372 functions simply return AE_OK, but should set the return value to zero
2373 also. This change implements this. ACPICA BZ 1038.
2375 Debugger: Prevent possible command line buffer overflow. Increase the
2376 size of a couple of the debugger line buffers, and ensure that overflow
2377 cannot happen. ACPICA BZ 1037.
2379 iASL: Changed to abort immediately on serious errors during the parsing
2380 phase. Due to the nature of ASL, there is no point in attempting to
2381 compile these types of errors, and they typically end up causing a
2382 cascade of hundreds of errors which obscure the original problem.
2384 ----------------------------------------
2385 25 July 2013. Summary of changes for version 20130725:
2387 1) ACPICA kernel-resident subsystem:
2389 Fixed a problem with the DerefOf operator where references to FieldUnits
2390 and BufferFields incorrectly returned the parent object, not the actual
2391 value of the object. After this change, a dereference of a FieldUnit
2392 reference results in a read operation on the field to get the value, and
2393 likewise, the appropriate BufferField value is extracted from the target
2396 Fixed a problem where the _WAK method could cause a fault under these
2397 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
2398 method returned no value. The problem is rarely seen because most kernels
2399 run ACPICA in slack mode.
2401 For the DerefOf operator, a fatal error now results if an attempt is made
2402 to dereference a reference (created by the Index operator) to a NULL
2403 package element. Provides compatibility with other ACPI implementations,
2404 and this behavior will be added to a future version of the ACPI
2407 The ACPI Power Management Timer (defined in the FADT) is now optional.
2408 This provides compatibility with other ACPI implementations and will
2409 appear in the next version of the ACPI specification. If there is no PM
2410 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
2411 zero in the FADT indicates no PM timer.
2413 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
2414 allows the host to globally enable/disable all vendor strings, all
2415 feature strings, or both. Intended to be primarily used for debugging
2416 purposes only. Lv Zheng.
2418 Expose the collected _OSI data to the host via a global variable. This
2419 data tracks the highest level vendor ID that has been invoked by the BIOS
2420 so that the host (and potentially ACPICA itself) can change behaviors
2421 based upon the age of the BIOS.
2423 Example Code and Data Size: These are the sizes for the OS-independent
2424 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2425 debug version of the code includes the debug output trace mechanism and
2426 has a much larger code and data size.
2429 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
2430 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
2432 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
2433 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
2436 2) iASL Compiler/Disassembler and Tools:
2438 iASL: Created the following enhancements for the -so option (create
2440 1)Add offsets for the last nameseg in each namepath for every supported
2442 2)Add support for Processor, Device, Thermal Zone, and Scope objects
2443 3)Add the actual AML opcode for the parent object of every supported
2445 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
2447 Disassembler: Emit all unresolved external symbols in a single block.
2448 These are external references to control methods that could not be
2449 resolved, and thus, the disassembler had to make a guess at the number of
2452 iASL: The argument to the -T option (create table template) is now
2453 optional. If not specified, the default table is a DSDT, typically the
2456 ----------------------------------------
2457 26 June 2013. Summary of changes for version 20130626:
2459 1) ACPICA kernel-resident subsystem:
2461 Fixed an issue with runtime repair of the _CST object. Null or invalid
2462 elements were not always removed properly. Lv Zheng.
2464 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
2465 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
2466 the maximum number of GPEs is 1016. Use of multiple GPE block devices
2467 makes the system-wide number of GPEs essentially unlimited.
2469 Example Code and Data Size: These are the sizes for the OS-independent
2470 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2471 debug version of the code includes the debug output trace mechanism and
2472 has a much larger code and data size.
2475 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
2476 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
2478 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
2479 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
2482 2) iASL Compiler/Disassembler and Tools:
2484 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
2485 hosts. Now supports Linux, FreeBSD, and Windows.
2487 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
2488 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
2490 iASL/Preprocessor: Implemented full support for nested
2491 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
2493 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
2494 max. The original purpose of this constraint was to limit the amount of
2495 debug output. However, the string function in question (UtPrintString) is
2496 now used for the disassembler also, where 256 bytes is insufficient.
2497 Reported by RehabMan@GitHub.
2499 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
2500 tables. ACPICA BZ 999. Lv Zheng.
2502 iASL: Fixed a couple of error exit issues that could result in a "Could
2503 not delete <file>" message during ASL compilation.
2505 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
2506 the actual signatures for these tables are "FACP" and "APIC",
2509 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
2510 tables are allowed to have multiple instances.
2512 ----------------------------------------
2513 17 May 2013. Summary of changes for version 20130517:
2515 1) ACPICA kernel-resident subsystem:
2517 Fixed a regression introduced in version 20130328 for _INI methods. This
2518 change fixes a problem introduced in 20130328 where _INI methods are no
2519 longer executed properly because of a memory block that was not
2520 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
2521 <tomasz.nowicki@linaro.org>.
2523 Fixed a possible problem with the new extended sleep registers in the
2525 5.0 FADT. Do not use these registers (even if populated) unless the HW-
2526 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
2529 Implemented return value repair code for _CST predefined objects: Sort
2531 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
2533 Implemented a debug-only option to disable loading of SSDTs from the
2534 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
2535 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
2536 acglobal.h - ACPICA BZ 1005. Lv Zheng.
2538 Fixed some issues in the ACPICA initialization and termination code:
2539 Tomasz Nowicki <tomasz.nowicki@linaro.org>
2540 1) Clear events initialized flag upon event component termination. ACPICA
2542 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
2543 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
2544 4) Clear debug buffer global on termination to prevent possible multiple
2545 delete. ACPICA BZ 1010.
2547 Standardized all switch() blocks across the entire source base. After
2549 years, different formatting for switch() had crept in. This change makes
2550 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
2552 Split some files to enhance ACPICA modularity and configurability:
2553 1) Split buffer dump routines into utilities/utbuffer.c
2554 2) Split internal error message routines into utilities/uterror.c
2555 3) Split table print utilities into tables/tbprint.c
2556 4) Split iASL command-line option processing into asloptions.c
2558 Makefile enhancements:
2559 1) Support for all new files above.
2560 2) Abort make on errors from any subcomponent. Chao Guan.
2561 3) Add build support for Apple Mac OS X. Liang Qi.
2563 Example Code and Data Size: These are the sizes for the OS-independent
2564 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2565 debug version of the code includes the debug output trace mechanism and
2566 has a much larger code and data size.
2569 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
2570 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
2572 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
2573 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
2576 2) iASL Compiler/Disassembler and Tools:
2578 New utility: Implemented an easily portable version of the acpidump
2579 utility to extract ACPI tables from the system (or a file) in an ASCII
2581 dump format. The top-level code implements the various command line
2582 options, file I/O, and table dump routines. To port to a new host, only
2583 three functions need to be implemented to get tables -- since this
2584 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
2585 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
2586 1) The Windows version obtains the ACPI tables from the Registry.
2587 2) The Linux version is under development.
2588 3) Other hosts - If an OS-dependent module is submitted, it will be
2589 distributed with ACPICA.
2591 iASL: Fixed a regression for -D preprocessor option (define symbol). A
2592 restructuring/change to the initialization sequence caused this option to
2593 no longer work properly.
2595 iASL: Implemented a mechanism to disable specific warnings and remarks.
2596 Adds a new command line option, "-vw <messageid> as well as "#pragma
2597 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
2599 iASL: Fix for too-strict package object validation. The package object
2600 validation for return values from the predefined names is a bit too
2601 strict, it does not allow names references within the package (which will
2602 be resolved at runtime.) These types of references cannot be validated at
2603 compile time. This change ignores named references within package objects
2604 for names that return or define static packages.
2606 Debugger: Fixed the 80-character command line limitation for the History
2607 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
2609 iASL: Added control method and package support for the -so option
2610 (generates AML offset table for BIOS support.)
2612 iASL: issue a remark if a non-serialized method creates named objects. If
2613 a thread blocks within the method for any reason, and another thread
2614 enters the method, the method will fail because an attempt will be made
2616 create the same (named) object twice. In this case, issue a remark that
2617 the method should be marked serialized. NOTE: may become a warning later.
2620 ----------------------------------------
2621 18 April 2013. Summary of changes for version 20130418:
2623 1) ACPICA kernel-resident subsystem:
2625 Fixed a possible buffer overrun during some rare but specific field unit
2626 read operations. This overrun can only happen if the DSDT version is 1 --
2627 meaning that all AML integers are 32 bits -- and the field length is
2628 between 33 and 55 bits long. During the read, an internal buffer object
2630 created for the field unit because the field is larger than an integer
2632 bits). However, in this case, the buffer will be incorrectly written
2633 beyond the end because the buffer length is less than the internal
2635 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
2636 long, but a full 8 bytes will be written.
2638 Updated the Embedded Controller "orphan" _REG method support. This refers
2639 to _REG methods under the EC device that have no corresponding operation
2640 region. This is allowed by the ACPI specification. This update removes a
2641 dependency on the existence an ECDT table. It will execute an orphan _REG
2642 method as long as the operation region handler for the EC is installed at
2643 the EC device node and not the namespace root. Rui Zhang (original
2644 update), Bob Moore (update/integrate).
2646 Implemented run-time argument typechecking for all predefined ACPI names
2647 (_STA, _BIF, etc.) This change performs object typechecking on all
2648 incoming arguments for all predefined names executed via
2649 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
2650 passing correct object types as well as the correct number of arguments
2651 (therefore identifying any issues immediately). Also, the ASL/namespace
2652 definition of the predefined name is checked against the ACPI
2653 specification for the proper argument count. Adds one new file,
2656 Changed an exception code for the ASL UnLoad() operator. Changed the
2657 exception code for the case where the input DdbHandle is invalid, from
2658 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
2660 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
2661 global makefile. The use of this flag causes compiler errors on earlier
2662 versions of GCC, so it has been removed for compatibility.
2664 Miscellaneous cleanup:
2665 1) Removed some unused/obsolete macros
2666 2) Fixed a possible memory leak in the _OSI support
2667 3) Removed an unused variable in the predefined name support
2668 4) Windows OSL: remove obsolete reference to a memory list field
2670 Example Code and Data Size: These are the sizes for the OS-independent
2671 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2672 debug version of the code includes the debug output trace mechanism and
2673 has a much larger code and data size.
2676 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
2677 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
2679 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
2680 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
2683 2) iASL Compiler/Disassembler and Tools:
2685 AcpiExec: Added installation of a handler for the SystemCMOS address
2686 space. This prevents control method abort if a method accesses this
2689 AcpiExec: Added support for multiple EC devices, and now install EC
2690 operation region handler(s) at the actual EC device instead of the
2691 namespace root. This reflects the typical behavior of host operating
2694 AcpiExec: Updated to ensure that all operation region handlers are
2695 installed before the _REG methods are executed. This prevents a _REG
2696 method from aborting if it accesses an address space has no handler.
2697 AcpiExec installs a handler for every possible address space.
2699 Debugger: Enhanced the "handlers" command to display non-root handlers.
2700 This change enhances the handlers command to display handlers associated
2701 with individual devices throughout the namespace, in addition to the
2702 currently supported display of handlers associated with the root
2706 ASL Test Suite: Several test suite errors have been identified and
2707 resolved, reducing the total error count during execution. Chao Guan.
2709 ----------------------------------------
2710 28 March 2013. Summary of changes for version 20130328:
2712 1) ACPICA kernel-resident subsystem:
2714 Fixed several possible race conditions with the internal object reference
2715 counting mechanism. Some of the external ACPICA interfaces update object
2716 reference counts without holding the interpreter or namespace lock. This
2717 change adds a spinlock to protect reference count updates on the internal
2718 ACPICA objects. Reported by and with assistance from Andriy Gapon
2721 FADT support: Removed an extraneous warning for very large GPE register
2722 sets. This change removes a size mismatch warning if the legacy length
2723 field for a GPE register set is larger than the 64-bit GAS structure can
2724 accommodate. GPE register sets can be larger than the 255-bit width
2725 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
2727 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
2728 return from this interface. Handles a possible timeout case if
2729 ACPI_WAIT_FOREVER is modified by the host to be a value less than
2730 "forever". Jung-uk Kim.
2732 Predefined name support: Add allowed/required argument type information
2734 the master predefined info table. This change adds the infrastructure to
2735 enable typechecking on incoming arguments for all predefined
2736 methods/objects. It does not actually contain the code that will fully
2737 utilize this information, this is still under development. Also condenses
2738 some duplicate code for the predefined names into a new module,
2739 utilities/utpredef.c
2741 Example Code and Data Size: These are the sizes for the OS-independent
2742 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2743 debug version of the code includes the debug output trace mechanism and
2744 has a much larger code and data size.
2747 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
2748 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
2750 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
2751 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
2754 2) iASL Compiler/Disassembler and Tools:
2756 iASL: Implemented a new option to simplify the development of ACPI-
2758 BIOS code. Adds support for a new "offset table" output file. The -so
2759 option will create a C table containing the AML table offsets of various
2760 named objects in the namespace so that BIOS code can modify them easily
2762 boot time. This can simplify BIOS runtime code by eliminating expensive
2763 searches for "magic values", enhancing boot times and adding greater
2764 reliability. With assistance from Lee Hamel.
2766 iASL: Allow additional predefined names to return zero-length packages.
2767 Now, all predefined names that are defined by the ACPI specification to
2768 return a "variable-length package of packages" are allowed to return a
2769 zero length top-level package. This allows the BIOS to tell the host that
2770 the requested feature is not supported, and supports existing BIOS/ASL
2773 iASL: Changed the "result not used" warning to an error. This is the case
2774 where an ASL operator is effectively a NOOP because the result of the
2775 operation is not stored anywhere. For example:
2777 There is no target (missing 3rd argument), nor is the function return
2778 value used. This is potentially a very serious problem -- since the code
2779 was probably intended to do something, but for whatever reason, the value
2780 was not stored. Therefore, this issue has been upgraded from a warning to
2783 AcpiHelp: Added allowable/required argument types to the predefined names
2784 info display. This feature utilizes the recent update to the predefined
2785 names table (above).
2787 ----------------------------------------
2788 14 February 2013. Summary of changes for version 20130214:
2790 1) ACPICA Kernel-resident Subsystem:
2792 Fixed a possible regression on some hosts: Reinstated the safe return
2793 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
2794 evaluated only once. Although these macros are not needed for the ACPICA
2795 code itself, they are often used by ACPI-related host device drivers
2797 the safe feature may be necessary.
2799 Fixed several issues related to the ACPI 5.0 reduced hardware support
2800 (SOC): Now ensure that if the platform declares itself as hardware-
2802 via the FADT, the following functions become NOOPs (and always return
2803 AE_OK) because ACPI is always enabled by definition on these machines:
2809 Dynamic Object Repair: Implemented additional runtime repairs for
2810 predefined name return values. Both of these repairs can simplify code in
2811 the related device drivers that invoke these methods:
2812 1) For the _STR and _MLS names, automatically repair/convert an ASCII
2813 string to a Unicode buffer.
2814 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
2816 lone end tag descriptor in the following cases: A Return(0) was executed,
2817 a null buffer was returned, or no object at all was returned (non-slack
2818 mode only). Adds a new file, nsconvert.c
2819 ACPICA BZ 998. Bob Moore, Lv Zheng.
2821 Resource Manager: Added additional code to prevent possible infinite
2823 while traversing corrupted or ill-formed resource template buffers. Check
2824 for zero-length resource descriptors in all code that loops through
2825 resource templates (the length field is used to index through the
2826 template). This change also hardens the external AcpiWalkResources and
2827 AcpiWalkResourceBuffer interfaces.
2829 Local Cache Manager: Enhanced the main data structure to eliminate an
2830 unnecessary mechanism to access the next object in the list. Actually
2831 provides a small performance enhancement for hosts that use the local
2832 ACPICA cache manager. Jung-uk Kim.
2834 Example Code and Data Size: These are the sizes for the OS-independent
2835 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2836 debug version of the code includes the debug output trace mechanism and
2837 has a much larger code and data size.
2840 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
2841 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
2843 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
2844 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
2847 2) iASL Compiler/Disassembler and Tools:
2849 iASL/Disassembler: Fixed several issues with the definition of the ACPI
2850 5.0 RASF table (RAS Feature Table). This change incorporates late changes
2851 that were made to the ACPI 5.0 specification.
2853 iASL/Disassembler: Added full support for the following new ACPI tables:
2854 1) The MTMR table (MID Timer Table)
2855 2) The VRTC table (Virtual Real Time Clock Table).
2856 Includes header file, disassembler, table compiler, and template support
2859 iASL: Implemented compile-time validation of package objects returned by
2860 predefined names. This new feature validates static package objects
2861 returned by the various predefined names defined to return packages. Both
2862 object types and package lengths are validated, for both parent packages
2863 and sub-packages, if any. The code is similar in structure and behavior
2865 the runtime repair mechanism within the AML interpreter and uses the
2866 existing predefined name information table. Adds a new file, aslprepkg.c.
2869 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
2870 This feature detects a binary file with a valid ACPI table header and
2871 invokes the disassembler automatically. Eliminates the need to
2872 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
2874 iASL/Disassembler: Added several warnings for the case where there are
2875 unresolved control methods during the disassembly. This can potentially
2876 cause errors when the output file is compiled, because the disassembler
2877 assumes zero method arguments in these cases (it cannot determine the
2878 actual number of arguments without resolution/definition of the method).
2880 Debugger: Added support to display all resources with a single command.
2881 Invocation of the resources command with no arguments will now display
2883 resources within the current namespace.
2885 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
2888 ----------------------------------------
2889 17 January 2013. Summary of changes for version 20130117:
2891 1) ACPICA Kernel-resident Subsystem:
2893 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
2894 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
2895 objects to return a package containing one integer, most BIOS code
2897 two integers and the previous code reflects that. However, we also need
2899 support BIOS code that actually implements to the ACPI spec, and this
2900 change reflects this.
2902 Fixed two issues with the ACPI_DEBUG_PRINT macros:
2903 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
2904 C compilers that require this support.
2905 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
2906 ACPI_DEBUG is already used by many of the various hosts.
2908 Updated all ACPICA copyrights and signons to 2013. Added the 2013
2909 copyright to all module headers and signons, including the standard Linux
2910 header. This affects virtually every file in the ACPICA core subsystem,
2911 iASL compiler, all ACPICA utilities, and the test suites.
2913 Example Code and Data Size: These are the sizes for the OS-independent
2914 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2915 debug version of the code includes the debug output trace mechanism and
2916 has a much larger code and data size.
2919 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
2920 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
2922 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
2923 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
2926 2) iASL Compiler/Disassembler and Tools:
2928 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
2929 prevent a possible fault on some hosts. Some C libraries modify the arg
2930 pointer parameter to vfprintf making it difficult to call it twice in the
2931 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
2932 does not affect the Windows OSL since the Win C library does not modify
2933 the arg pointer. Chao Guan, Bob Moore.
2935 iASL: Fixed a possible infinite loop when the maximum error count is
2936 reached. If an output file other than the .AML file is specified (such as
2937 a listing file), and the maximum number of errors is reached, do not
2938 attempt to flush data to the output file(s) as the compiler is aborting.
2939 This can cause an infinite loop as the max error count code essentially
2940 keeps calling itself.
2942 iASL/Disassembler: Added an option (-in) to ignore NOOP
2944 Implemented for both the compiler and the disassembler. Often, the NOOP
2945 opcode is used as padding for packages that are changed dynamically by
2947 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
2948 errors. This option causes the disassembler to ignore all NOOP opcodes
2949 (0xA3), and it also causes the compiler to ignore all ASL source code
2953 Debugger: Enhanced the Sleep command to execute all sleep states. This
2954 change allows Sleep to be invoked with no arguments and causes the
2955 debugger to execute all of the sleep states, 0-5, automatically.
2957 ----------------------------------------
2958 20 December 2012. Summary of changes for version 20121220:
2960 1) ACPICA Kernel-resident Subsystem:
2962 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
2963 alternate entry point for AcpiWalkResources and improves the usability of
2964 the resource manager by accepting as input a buffer containing the output
2965 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
2966 input buffer is not deleted by this interface so that it can be used by
2967 the host later. See the ACPICA reference for details.
2969 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
2970 (DSDT version < 2). The constant will be truncated and this warning
2971 reflects that behavior.
2973 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
2974 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
2975 both get and set the new wake bit in these descriptors, separately from
2976 the existing share bit. Reported by Aaron Lu.
2978 Interpreter: Fix Store() when an implicit conversion is not possible. For
2979 example, in the cases such as a store of a string to an existing package
2980 object, implement the store as a CopyObject(). This is a small departure
2981 from the ACPI specification which states that the control method should
2983 aborted in this case. However, the ASLTS suite depends on this behavior.
2985 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
2986 macros: check if debug output is currently enabled as soon as possible to
2987 minimize performance impact if debug is in fact not enabled.
2989 Source code restructuring: Cleanup to improve modularity. The following
2990 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
2991 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
2992 Associated makefiles and project files have been updated.
2994 Changed an exception code for LoadTable operator. For the case where one
2995 of the input strings is too long, change the returned exception code from
2996 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
2998 Fixed a possible memory leak in dispatcher error path. On error, delete
2999 the mutex object created during method mutex creation. Reported by
3000 tim.gardner@canonical.com.
3002 Example Code and Data Size: These are the sizes for the OS-independent
3003 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3004 debug version of the code includes the debug output trace mechanism and
3005 has a much larger code and data size.
3008 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
3009 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
3011 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
3012 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
3015 2) iASL Compiler/Disassembler and Tools:
3017 iASL: Disallow a method call as argument to the ObjectType ASL operator.
3018 This change tracks an errata to the ACPI 5.0 document. The AML grammar
3019 will not allow the interpreter to differentiate between a method and a
3020 method invocation when these are used as an argument to the ObjectType
3021 operator. The ACPI specification change is to disallow a method
3023 (UserTerm) for the ObjectType operator.
3025 Finish support for the TPM2 and CSRT tables in the headers, table
3026 compiler, and disassembler.
3028 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
3029 always expires immediately if the semaphore is not available. The
3031 code was using a relative-time timeout, but sem_timedwait requires the
3033 of an absolute time.
3035 iASL: Added a remark if the Timer() operator is used within a 32-bit
3036 table. This operator returns a 64-bit time value that will be truncated
3037 within a 32-bit table.
3039 iASL Source code restructuring: Cleanup to improve modularity. The
3040 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
3041 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
3045 ----------------------------------------
3046 14 November 2012. Summary of changes for version 20121114:
3048 1) ACPICA Kernel-resident Subsystem:
3050 Implemented a performance enhancement for ACPI/AML Package objects. This
3051 change greatly increases the performance of Package objects within the
3052 interpreter. It changes the processing of reference counts for packages
3054 optimizing for the most common case where the package sub-objects are
3055 either Integers, Strings, or Buffers. Increases the overall performance
3057 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
3059 Chao Guan. ACPICA BZ 943.
3061 Implemented and deployed common macros to extract flag bits from resource
3062 descriptors. Improves readability and maintainability of the code. Fixes
3064 problem with the UART serial bus descriptor for the number of data bits
3065 flags (was incorrectly 2 bits, should be 3).
3067 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
3068 of the macros and changed the SETx macros to the style of (destination,
3069 source). Also added ACPI_CASTx companion macros. Lv Zheng.
3071 Example Code and Data Size: These are the sizes for the OS-independent
3072 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3073 debug version of the code includes the debug output trace mechanism and
3074 has a much larger code and data size.
3077 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
3078 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
3080 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
3081 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
3084 2) iASL Compiler/Disassembler and Tools:
3086 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
3087 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
3088 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
3090 Disassembler: Fixed a problem with external declaration generation. Fixes
3091 a problem where an incorrect pathname could be generated for an external
3092 declaration if the original reference to the object includes leading
3093 carats (^). ACPICA BZ 984.
3095 Debugger: Completed a major update for the Disassemble<method> command.
3096 This command was out-of-date and did not properly disassemble control
3097 methods that had any reasonable complexity. This fix brings the command
3099 to the same level as the rest of the disassembler. Adds one new file,
3100 dmdeferred.c, which is existing code that is now common with the main
3101 disassembler and the debugger disassemble command. ACPICA MZ 978.
3103 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
3104 Newer versions of Bison emit this prototype, so moved the prototype out
3106 the iASL header to where it is actually used in order to avoid a
3110 iASL/Tools: Standardized use of the stream I/O functions:
3111 1) Ensure check for I/O error after every fopen/fread/fwrite
3112 2) Ensure proper order of size/count arguments for fread/fwrite
3113 3) Use test of (Actual != Requested) after all fwrite, and most fread
3114 4) Standardize I/O error messages
3115 Improves reliability and maintainability of the code. Bob Moore, Lv
3119 Disassembler: Prevent duplicate External() statements. During generation
3120 of external statements, detect similar pathnames that are actually
3121 duplicates such as these:
3124 Remove all leading '\' characters from pathnames during the external
3125 statement generation so that duplicates will be detected and tossed.
3128 Tools: Replace low-level I/O with stream I/O functions. Replace
3129 open/read/write/close with the stream I/O equivalents
3130 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
3133 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
3134 name header so that AcpiXtract recognizes the output file/table.
3136 iASL: Remove obsolete -2 option flag. Originally intended to force the
3137 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
3138 and the entire concept is now obsolete.
3140 ----------------------------------------
3141 18 October 2012. Summary of changes for version 20121018:
3144 1) ACPICA Kernel-resident Subsystem:
3146 Updated support for the ACPI 5.0 MPST table. Fixes some problems
3147 introduced by late changes to the table as it was added to the ACPI 5.0
3148 specification. Includes header, disassembler, and data table compiler
3149 support as well as a new version of the MPST template.
3151 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
3152 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
3153 methods: _HID, _CID, and _UID.
3155 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
3156 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
3157 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
3158 names for their various drivers. Affects the AcpiGetObjectInfo external
3159 interface, and other internal interfaces as well.
3161 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
3162 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
3163 on machines that support non-aligned transfers. Optimizes for this case
3164 rather than using a strncpy. With assistance from Zheng Lv.
3166 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
3167 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
3169 Added a new debug print message for AML mutex objects that are force-
3170 released. At control method termination, any currently acquired mutex
3171 objects are force-released. Adds a new debug-only message for each one
3174 Audited/updated all ACPICA return macros and the function debug depth
3175 counter: 1) Ensure that all functions that use the various TRACE macros
3176 also use the appropriate ACPICA return macros. 2) Ensure that all normal
3177 return statements surround the return expression (value) with parens to
3178 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
3179 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
3181 Global source code changes/maintenance: All extra lines at the start and
3182 end of each source file have been removed for consistency. Also, within
3183 comments, all new sentences start with a single space instead of a double
3184 space, again for consistency across the code base.
3186 Example Code and Data Size: These are the sizes for the OS-independent
3187 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3188 debug version of the code includes the debug output trace mechanism and
3189 has a much larger code and data size.
3192 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
3193 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
3195 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
3196 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
3199 2) iASL Compiler/Disassembler and Tools:
3201 AcpiExec: Improved the algorithm used for memory leak/corruption
3202 detection. Added some intelligence to the code that maintains the global
3203 list of allocated memory. The list is now ordered by allocated memory
3204 address, significantly improving performance. When running AcpiExec on
3205 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
3206 on the platform and/or the environment. Note, this performance
3207 enhancement affects the AcpiExec utility only, not the kernel-resident
3210 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
3211 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
3212 incorrect table offset reported for invalid opcodes. Report the original
3213 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
3215 Disassembler: Enhanced the -vt option to emit the binary table data in
3216 hex format to assist with debugging.
3218 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
3219 size of file structure. Colin Ian King.
3221 ----------------------------------------
3222 13 September 2012. Summary of changes for version 20120913:
3225 1) ACPICA Kernel-resident Subsystem:
3227 ACPI 5.0: Added two new notify types for the Hardware Error Notification
3228 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
3232 Table Manager: Merged/removed duplicate code in the root table resize
3233 functions. One function is external, the other is internal. Lv Zheng,
3237 Makefiles: Completely removed the obsolete "Linux" makefiles under
3238 acpica/generate/linux. These makefiles are obsolete and have been
3241 the generic unix makefiles under acpica/generate/unix.
3243 Makefiles: Ensure that binary files always copied properly. Minor rule
3245 to ensure that the final binary output files are always copied up to the
3246 appropriate binary directory (bin32 or bin64.)
3248 Example Code and Data Size: These are the sizes for the OS-independent
3249 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3251 version of the code includes the debug output trace mechanism and has a
3253 larger code and data size.
3256 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
3257 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
3259 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
3260 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
3263 2) iASL Compiler/Disassembler and Tools:
3265 Disassembler: Fixed a possible fault during the disassembly of resource
3266 descriptors when a second parse is required because of the invocation of
3267 external control methods within the table. With assistance from
3268 adq@lidskialf.net. ACPICA BZ 976.
3270 iASL: Fixed a namepath optimization problem. An error can occur if the
3272 node that contains the namepath to be optimized does not have a parent
3274 that is a named object. This change fixes the problem.
3276 iASL: Fixed a regression where the AML file is not deleted on errors. The
3278 output file should be deleted if there are any errors during the
3281 only exception is if the -f (force output) option is used. ACPICA BZ 974.
3283 iASL: Added a feature to automatically increase internal line buffer
3285 Via realloc(), automatically increase the internal line buffer sizes as
3286 necessary to support very long source code lines. The current version of
3288 preprocessor requires a buffer long enough to contain full source code
3290 This change increases the line buffer(s) if the input lines go beyond the
3291 current buffer size. This eliminates errors that occurred when a source
3293 line was longer than the buffer.
3295 iASL: Fixed a problem with constant folding in method declarations. The
3296 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
3298 Type3 opcode was used.
3300 Debugger: Improved command help support. For incorrect argument count,
3302 full help for the command. For help command itself, allow an argument to
3305 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
3306 errors during execution of the suite. Guan Chao.
3308 ----------------------------------------
3309 16 August 2012. Summary of changes for version 20120816:
3312 1) ACPICA Kernel-resident Subsystem:
3314 Removed all use of the deprecated _GTS and _BFS predefined methods. The
3316 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
3317 deprecated and will probably be removed from the ACPI specification.
3319 does not invoke them, and reportedly never will. The final nail in the
3321 is that the ACPI specification states that these methods must be run with
3322 interrupts off, which is not going to happen in a kernel interpreter.
3324 Linux has removed all use of the methods also. It was discovered that
3325 invoking these functions caused failures on some machines, probably
3327 they were never tested since Windows does not call them. Affects two
3329 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
3332 Implemented support for complex bit-packed buffers returned from the _PLD
3333 (Physical Location of Device) predefined method. Adds a new external
3334 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
3336 structure. Note: C Bitfields cannot be used for this type of predefined
3337 structure since the memory layout of individual bitfields is not defined
3339 the C language. In addition, there are endian concerns where a compiler
3341 change the bitfield ordering based on the machine type. The new ACPICA
3342 interface eliminates these issues, and should be called after _PLD is
3343 executed. ACPICA BZ 954.
3345 Implemented a change to allow a scope change to root (via "Scope (\)")
3347 execution of module-level ASL code (code that is executed at table load
3350 Added the Windows8/Server2012 string for the _OSI method. This change
3353 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
3356 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
3358 and CSRT (Core System Resource Table).
3360 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
3361 names. This simplifies access to the buffers returned by these predefined
3362 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
3364 GPE support: Removed an extraneous parameter from the various low-level
3365 internal GPE functions. Tang Feng.
3367 Removed the linux makefiles from the unix packages. The generate/linux
3368 makefiles are obsolete and have been removed from the unix tarball
3370 packages. The replacement makefiles are under generate/unix, and there is
3372 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
3374 Updates for Unix makefiles:
3375 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
3376 2) Update linker flags (move to end of command line) for AcpiExec
3380 Split ACPICA initialization functions to new file, utxfinit.c. Split from
3381 utxface.c to improve modularity and reduce file size.
3383 Example Code and Data Size: These are the sizes for the OS-independent
3384 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3385 debug version of the code includes the debug output trace mechanism and
3387 much larger code and data size.
3390 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
3391 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
3393 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
3394 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
3397 2) iASL Compiler/Disassembler and Tools:
3399 iASL: Fixed a problem with constant folding for fixed-length constant
3400 expressions. The constant-folding code was not being invoked for constant
3401 expressions that allow the use of type 3/4/5 opcodes to generate
3403 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
3405 in the generation of invalid AML bytecode. ACPICA BZ 970.
3407 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
3408 apparently automatically emit some of the necessary externals. This
3410 handles these versions in order to eliminate generation warnings.
3412 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
3414 Disassembler: Add support to decode _PLD buffers. The decoded buffer
3416 within comments in the output file.
3418 Debugger: Fixed a regression with the "Threads" command where
3419 AE_BAD_PARAMETER was always returned.
3421 ----------------------------------------
3422 11 July 2012. Summary of changes for version 20120711:
3424 1) ACPICA Kernel-resident Subsystem:
3426 Fixed a possible fault in the return package object repair code. Fixes a
3427 problem that can occur when a lone package object is wrapped with an
3429 package object in order to force conformance to the ACPI specification.
3431 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
3435 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
3436 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
3437 ARB_DIS bit must be implemented in the host-dependent C3 processor power
3439 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
3441 Intel and other vendors. (for Intel: ICH4-M and earlier)
3443 This change removes the code to disable/enable bus master arbitration
3445 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
3447 resume problems on some machines. The change has been in use for over
3451 Implemented two new external interfaces to support host-directed dynamic
3453 table load and unload. They are intended to simplify the host
3455 of hot-plug support:
3456 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
3457 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
3459 See the ACPICA reference for additional details. Adds one new file,
3460 components/tables/tbxfload.c
3462 Implemented and deployed two new interfaces for errors and warnings that
3464 known to be caused by BIOS/firmware issues:
3465 AcpiBiosError: Prints "ACPI Firmware Error" message.
3466 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
3467 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
3469 and FADT errors. Additional deployment to be completed as appropriate in
3471 future. The associated conditional macros are ACPI_BIOS_ERROR and
3472 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
3477 Implicit notify support: ensure that no memory allocation occurs within a
3478 critical region. This fix moves a memory allocation outside of the time
3480 spinlock is held. Fixes issues on systems that do not allow this
3484 Split exception code utilities and tables into a new file,
3487 Example Code and Data Size: These are the sizes for the OS-independent
3488 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3490 version of the code includes the debug output trace mechanism and has a
3492 larger code and data size.
3495 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
3496 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
3498 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
3499 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
3502 2) iASL Compiler/Disassembler and Tools:
3504 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
3508 Debugger: Enhanced the "tables" command to emit additional information
3510 the current set of ACPI tables, including the owner ID and flags decode.
3512 Debugger: Reimplemented the "unload" command to use the new
3513 AcpiUnloadParentTable external interface. This command was disable
3515 due to need for an unload interface.
3517 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
3519 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
3521 ----------------------------------------
3522 20 June 2012. Summary of changes for version 20120620:
3525 1) ACPICA Kernel-resident Subsystem:
3527 Implemented support to expand the "implicit notify" feature to allow
3529 devices to be notified by a single GPE. This feature automatically
3531 runtime device notification in the absence of a BIOS-provided GPE control
3532 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
3534 provided by ACPICA for Windows compatibility, and is a workaround for
3537 code errors. See the description of the AcpiSetupGpeForWake interface in
3539 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
3541 Changed some comments and internal function names to simplify and ensure
3542 correctness of the Linux code translation. No functional changes.
3544 Example Code and Data Size: These are the sizes for the OS-independent
3545 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3547 version of the code includes the debug output trace mechanism and has a
3549 larger code and data size.
3552 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
3553 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
3555 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
3556 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
3559 2) iASL Compiler/Disassembler and Tools:
3561 Disassembler: Added support to emit short, commented descriptions for the
3563 predefined names in order to improve the readability of the disassembled
3564 output. ACPICA BZ 959. Changes include:
3565 1) Emit descriptions for all standard predefined names (_INI, _STA,
3568 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
3569 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
3572 AcpiSrc: Fixed several long-standing Linux code translation issues.
3574 descriptions in function headers are now translated properly to lower
3577 underscores. ACPICA BZ 961. Also fixes translation problems such as
3583 local_fADT -> local_FADT
3584 execute_oSI -> execute_OSI
3586 iASL: Fixed a problem where null bytes were inadvertently emitted into
3590 iASL: Added the existing debug options to the standard help screen. There
3592 no longer two different help screens. ACPICA BZ 957.
3594 AcpiHelp: Fixed some typos in the various predefined name descriptions.
3596 expand some of the descriptions where appropriate.
3598 iASL: Fixed the -ot option (display compile times/statistics). Was not
3600 properly for standard output; only worked for the debug file case.
3602 ----------------------------------------
3603 18 May 2012. Summary of changes for version 20120518:
3606 1) ACPICA Core Subsystem:
3608 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
3610 to block until asynchronous events such as notifies and GPEs have
3612 Within ACPICA, it is only called before a notify or GPE handler is
3613 removed/uninstalled. It also may be useful for the host OS within related
3614 drivers such as the Embedded Controller driver. See the ACPICA reference
3616 additional information. ACPICA BZ 868.
3618 ACPI Tables: Added a new error message for a possible overflow failure
3620 the conversion of FADT 32-bit legacy register addresses to internal
3623 bit GAS structure representation. The GAS has a one-byte "bit length"
3625 thus limiting the register length to 255 bits. ACPICA BZ 953.
3627 Example Code and Data Size: These are the sizes for the OS-independent
3628 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3630 version of the code includes the debug output trace mechanism and has a
3632 larger code and data size.
3635 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
3636 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
3638 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
3639 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
3642 2) iASL Compiler/Disassembler and Tools:
3644 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
3646 This keyword was added late in the ACPI 5.0 release cycle and was not
3647 implemented until now.
3649 Disassembler: Added support for Operation Region externals. Adds missing
3650 support for operation regions that are defined in another table, and
3651 referenced locally via a Field or BankField ASL operator. Now generates
3653 correct External statement.
3655 Disassembler: Several additional fixes for the External() statement
3657 related to some ASL operators. Also, order the External() statements
3658 alphabetically in the disassembler output. Fixes the External()
3661 the Create* field, Alias, and Scope operators:
3662 1) Create* buffer field operators - fix type mismatch warning on
3664 2) Alias - implement missing External support
3665 3) Scope - fix to make sure all necessary externals are emitted.
3667 iASL: Improved pathname support. For include files, merge the prefix
3669 with the file pathname and eliminate unnecessary components. Convert
3670 backslashes in all pathnames to forward slashes, for readability. Include
3672 pathname changes affect both #include and Include() type operators.
3674 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
3676 of a valid line by inserting a newline and then returning the EOF during
3678 next call to GetNextLine. Prevents the line from being ignored due to EOF
3681 iASL: Implemented some changes to enhance the IDE support (-vi option.)
3683 and Warning messages are now correctly recognized for both the source
3685 browser and the global error and warning counts.
3687 ----------------------------------------
3688 20 April 2012. Summary of changes for version 20120420:
3691 1) ACPICA Core Subsystem:
3693 Implemented support for multiple notify handlers. This change adds
3696 allow multiple system and device notify handlers on Device, Thermal Zone,
3698 Processor objects. This can simplify the host OS notification
3700 Also re-worked and restructured the entire notify support code to
3702 handler installation, handler removal, notify event queuing, and notify
3703 dispatch to handler(s). Note: there can still only be two global notify
3704 handlers - one for system notifies and one for device notifies. There are
3706 changes to the existing handler install/remove interfaces. Lin Ming, Bob
3707 Moore, Rafael Wysocki.
3709 Fixed a regression in the package repair code where the object reference
3710 count was calculated incorrectly. Regression was introduced in the commit
3711 "Support to add Package wrappers".
3713 Fixed a couple possible memory leaks in the AML parser, in the error
3715 path. Jesper Juhl, Lin Ming.
3717 Example Code and Data Size: These are the sizes for the OS-independent
3718 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3719 debug version of the code includes the debug output trace mechanism and
3721 much larger code and data size.
3724 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
3725 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
3727 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
3728 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
3731 2) iASL Compiler/Disassembler and Tools:
3733 iASL: Fixed a problem with the resource descriptor support where the
3735 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
3736 included in cumulative descriptor offset, resulting in incorrect values
3738 resource tags within resource descriptors appearing after a
3740 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
3742 iASL and Preprocessor: Implemented full support for the #line directive
3744 correctly track original source file line numbers through the .i
3746 output file - for error and warning messages.
3748 iASL: Expand the allowable byte constants for address space IDs.
3750 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
3751 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
3753 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
3755 iASL: Add option to completely disable the preprocessor (-Pn).
3757 iASL: Now emit all error/warning messages to standard error (stderr) by
3758 default (instead of the previous stdout).
3760 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
3762 for resource descriptor offset fix above. Update/cleanup error output
3763 routines. Enable and send iASL errors/warnings to an error logfile
3764 (error.txt). Send all other iASL output to a logfile (compiler.txt).
3766 several extraneous "unrecognized operator" messages.
3768 ----------------------------------------
3769 20 March 2012. Summary of changes for version 20120320:
3772 1) ACPICA Core Subsystem:
3774 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
3775 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
3777 does not execute these methods, and therefore these methods are often
3778 untested. It has been seen on some systems where the execution of these
3779 methods causes errors and also prevents the machine from entering S5. It
3781 therefore suggested that host operating systems do not execute these
3783 by default. In the future, perhaps these methods can be optionally
3785 based on the age of the system and/or what is the newest version of
3787 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
3789 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
3792 Fixed a problem where the length of the local/common FADT was set too
3794 The local FADT table length cannot be set to the common length until the
3795 original length has been examined. There is code that checks the table
3797 and sets various fields appropriately. This can affect older machines
3799 early FADT versions. For example, this can cause inadvertent writes to
3801 CST_CNT register. Julian Anastasov.
3803 Fixed a mapping issue related to a physical table override. Use the
3805 mapping mechanism for tables loaded via the physical override OSL
3807 This allows for early mapping before the virtual memory manager is
3809 Thomas Renninger, Bob Moore.
3811 Enhanced the automatic return-object repair code: Repair a common problem
3813 predefined methods that are defined to return a variable-length Package
3815 sub-objects. If there is only one sub-object, some BIOS ASL code
3817 simply returns the single object instead of a Package with one sub-
3819 This new support will repair this error by wrapping a Package object
3821 the original object, creating the correct and expected Package with one
3823 object. Names that can be repaired in this manner include: _ALR, _CSD,
3825 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
3828 Changed the exception code returned for invalid ACPI paths passed as
3829 parameters to external interfaces such as AcpiEvaluateObject. Was
3830 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
3832 Example Code and Data Size: These are the sizes for the OS-independent
3833 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3835 version of the code includes the debug output trace mechanism and has a
3837 larger code and data size.
3840 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
3841 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
3843 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
3844 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
3847 2) iASL Compiler/Disassembler and Tools:
3849 iASL: Added the infrastructure and initial implementation of a integrated
3851 like preprocessor. This will simplify BIOS development process by
3853 the need for a separate preprocessing step during builds. On Windows, it
3855 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
3856 features including full #define() macro support are still under
3858 These preprocessor directives are supported:
3871 In addition, these new command line options are supported:
3872 -D <symbol> Define symbol for preprocessor use
3873 -li Create preprocessed output file (*.i)
3874 -P Preprocess only and create preprocessor output file (*.i)
3876 Table Compiler: Fixed a problem where the equals operator within an
3878 did not work properly.
3880 Updated iASL to use the current versions of Bison/Flex. Updated the
3882 project file to invoke these tools from the standard location. ACPICA BZ
3885 Flex for Windows: V2.5.4
3886 Bison for Windows: V2.4.1
3888 ----------------------------------------
3889 15 February 2012. Summary of changes for version 20120215:
3892 1) ACPICA Core Subsystem:
3894 There have been some major changes to the sleep/wake support code, as
3895 described below (a - e).
3897 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
3898 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
3899 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
3901 time the _BFS method is called and the _WAK method is called. NOTE: all
3903 must update their wake/resume code or else sleep/wake will not work
3907 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
3909 method. Some machines require that the GPEs are enabled before the _WAK
3911 is executed. Thomas Renninger.
3913 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
3915 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
3917 determine whether the system is rebooting or resuming. Matthew Garrett.
3919 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
3921 match the ACPI specification requirement. Rafael Wysocki.
3923 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
3924 registers within the V5 FADT. This support adds two new files:
3925 hardware/hwesleep.c implements the support for the new registers. Moved
3927 sleep/wake external interfaces to hardware/hwxfsleep.c.
3930 Added a new OSL interface for ACPI table overrides,
3931 AcpiOsPhysicalTableOverride. This interface allows the host to override a
3932 table via a physical address, instead of the logical address required by
3933 AcpiOsTableOverride. This simplifies the host implementation. Initial
3934 implementation by Thomas Renninger. The ACPICA implementation creates a
3936 shared function for table overrides that attempts both a logical and a
3939 Expanded the OSL memory read/write interfaces to 64-bit data
3940 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
3941 transfer support for GAS register structures passed to AcpiRead and
3944 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
3946 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
3948 See the ACPICA reference for details. ACPICA BZ 942. This option removes
3950 10% of the code and 5% of the static data, and the following hardware
3952 features become unavailable:
3953 PM Event and Control registers
3954 SCI interrupt (and handler)
3956 General Purpose Events (GPEs)
3959 FACS table (Waking vectors and Global Lock)
3961 Updated the unix tarball directory structure to match the ACPICA git
3963 tree. This ensures that the generic unix makefiles work properly (in
3964 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
3967 Updated the return value of the _REV predefined method to integer value 5
3969 reflect ACPI 5.0 support.
3971 Moved the external ACPI PM timer interface prototypes to the public
3973 file where they belong.
3975 Example Code and Data Size: These are the sizes for the OS-independent
3976 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3978 version of the code includes the debug output trace mechanism and has a
3980 larger code and data size.
3983 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
3984 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
3986 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
3987 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
3990 2) iASL Compiler/Disassembler and Tools:
3992 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
3993 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
3994 incorrectly displayed.
3996 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
3999 ----------------------------------------
4000 11 January 2012. Summary of changes for version 20120111:
4003 1) ACPICA Core Subsystem:
4005 Implemented a new mechanism to allow host device drivers to check for
4007 range conflicts with ACPI Operation Regions. Both SystemMemory and
4009 address spaces are supported. A new external interface,
4010 AcpiCheckAddressRange,
4011 allows drivers to check an address range against the ACPI namespace. See
4013 ACPICA reference for additional details. Adds one new file,
4014 utilities/utaddress.c. Lin Ming, Bob Moore.
4016 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
4019 Status registers, update the ACPI 5.0 flags, and update internal data
4020 structures to handle an FADT larger than 256 bytes. The size of the ACPI
4024 Updated all ACPICA copyrights and signons to 2012. Added the 2012
4026 all module headers and signons, including the standard Linux header. This
4027 affects virtually every file in the ACPICA core subsystem, iASL compiler,
4029 all ACPICA utilities.
4031 Example Code and Data Size: These are the sizes for the OS-independent
4032 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4034 version of the code includes the debug output trace mechanism and has a
4036 larger code and data size.
4039 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
4040 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
4042 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
4043 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
4046 2) iASL Compiler/Disassembler and Tools:
4048 Disassembler: fixed a problem with the automatic resource tag generation
4049 support. Fixes a problem where the resource tags are inadvertently not
4050 constructed if the table being disassembled contains external references
4052 control methods. Moved the actual construction of the tags to after the
4054 namespace is constructed (after 2nd parse is invoked due to external
4056 method references.) ACPICA BZ 941.
4058 Table Compiler: Make all "generic" operators caseless. These are the
4060 like UINT8, String, etc. Making these caseless improves ease-of-use.
4064 ----------------------------------------
4065 23 November 2011. Summary of changes for version 20111123:
4067 0) ACPI 5.0 Support:
4069 This release contains full support for the ACPI 5.0 specification, as
4072 Reduced Hardware Support:
4073 -------------------------
4075 This support allows for ACPI systems without the usual ACPI hardware.
4077 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
4079 not attempt to initialize or use any of the usual ACPI hardware. Note,
4081 this flag is set, all of the following ACPI hardware is assumed to be not
4082 present and is not initialized or accessed:
4084 General Purpose Events (GPEs)
4085 Fixed Events (PM1a/PM1b and PM Control)
4086 Power Management Timer and Console Buttons (power/sleep)
4087 Real-time Clock Alarm
4089 System Control Interrupt (SCI)
4090 The FACS is assumed to be non-existent
4095 All new tables and updates to existing tables are fully supported in the
4096 ACPICA headers (for use by device drivers), the disassembler, and the
4098 Data Table Compiler. ACPI 5.0 defines these new tables:
4100 BGRT /* Boot Graphics Resource Table */
4101 DRTM /* Dynamic Root of Trust for Measurement table */
4102 FPDT /* Firmware Performance Data Table */
4103 GTDT /* Generic Timer Description Table */
4104 MPST /* Memory Power State Table */
4105 PCCT /* Platform Communications Channel Table */
4106 PMTT /* Platform Memory Topology Table */
4107 RASF /* RAS Feature table */
4109 Operation Regions/SpaceIDs:
4110 ---------------------------
4112 All new operation regions are fully supported by the iASL compiler, the
4113 disassembler, and the ACPICA runtime code (for dispatch to region
4115 The new operation region Space IDs are:
4120 Resource Descriptors:
4121 ---------------------
4123 All new ASL resource descriptors are fully supported by the iASL
4126 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
4128 all new predefined resource tags). New descriptors are:
4137 ASL/AML Operators, New and Modified:
4138 ------------------------------------
4140 One new operator is added, the Connection operator, which is used to
4142 a GeneralPurposeIo or GenericSerialBus resource descriptor with
4144 field objects within an operation region. Several new protocols are
4146 with the AccessAs operator. All are fully supported by the iASL compiler,
4147 disassembler, and runtime ACPICA AML interpreter:
4149 Connection // Declare Field Connection
4151 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
4152 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
4154 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
4155 RawDataBuffer // Data type for Vendor Data
4158 Predefined ASL/AML Objects:
4159 ---------------------------
4161 All new predefined objects/control-methods are supported by the iASL
4163 and the ACPICA runtime validation/repair (arguments and return values.)
4165 predefined names include the following:
4167 Standard Predefined Names (Objects or Control Methods):
4168 _AEI, _CLS, _CPC, _CWS, _DEP,
4169 _DLM, _EVT, _GCP, _CRT, _GWS,
4170 _HRV, _PRE, _PSE, _SRT, _SUB.
4172 Resource Tags (Names used to access individual fields within resource
4174 _DBT, _DPL, _DRS, _END, _FLC,
4175 _IOR, _LIN, _MOD, _PAR, _PHA,
4176 _PIN, _PPI, _POL, _RXL, _SLV,
4177 _SPE, _STB, _TXL, _VEN.
4179 ACPICA External Interfaces:
4180 ---------------------------
4182 Several new interfaces have been defined for use by ACPI-related device
4183 drivers and other host OS services:
4185 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
4187 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
4188 provided by the BIOS. They are intended to be used in conjunction with
4190 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
4191 mutual exclusion with the AML code/interpreter.
4193 AcpiGetEventResources: Returns the (formatted) resource descriptors as
4195 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
4197 resource descriptors associated with hardware-reduced platform events,
4199 to the AcpiGetCurrentResources interface.
4201 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
4202 operation regions, information about the Connection() object and any
4204 length information is passed to the region handler within the Context
4207 AcpiBufferToResource: This interface converts a raw AML buffer containing
4209 resource template or resource descriptor to the ACPI_RESOURCE internal
4211 suitable for use by device drivers. Can be used by an operation region
4213 to convert the Connection() buffer object into a ACPI_RESOURCE.
4215 Miscellaneous/Tools/TestSuites:
4216 -------------------------------
4218 Support for extended _HID names (Four alpha characters instead of three).
4219 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
4220 Support for ACPI 5.0 features in the ASLTS test suite.
4221 Fully updated documentation (ACPICA and iASL reference documents.)
4223 ACPI Table Definition Language:
4224 -------------------------------
4226 Support for this language was implemented and released as a subsystem of
4228 iASL compiler in 2010. (See the iASL compiler User Guide.)
4231 Non-ACPI 5.0 changes for this release:
4232 --------------------------------------
4234 1) ACPICA Core Subsystem:
4236 Fix a problem with operation region declarations where a failure can
4239 the region name and an argument that evaluates to an object (such as the
4240 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
4243 Do not abort an ACPI table load if an invalid space ID is found within.
4245 will be caught later if the offending method is executed. ACPICA BZ 925.
4247 Fixed an issue with the FFixedHW space ID where the ID was not always
4248 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
4250 Fixed a problem with the 32-bit generation of the unix-specific OSL
4251 (osunixxf.c). Lin Ming, ACPICA BZ 936.
4253 Several changes made to enable generation with the GCC 4.6 compiler.
4257 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
4259 field registers out-of-range.
4261 2) iASL Compiler/Disassembler and Tools:
4263 iASL: Implemented the __PATH__ operator, which returns the full pathname
4265 the current source file.
4267 AcpiHelp: Automatically display expanded keyword information for all ASL
4270 Debugger: Add "Template" command to disassemble/dump resource template
4273 Added a new master script to generate and execute the ASLTS test suite.
4274 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
4276 iASL: Fix problem with listing generation during processing of the
4278 operator where AML listing was disabled until the entire Switch block was
4281 iASL: Improve support for semicolon statement terminators. Fix "invalid
4282 character" message for some cases when the semicolon is used. Semicolons
4284 now allowed after every <Term> grammar element. ACPICA BZ 927.
4286 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
4289 Disassembler: Fix problem with disassembly of the DataTableRegion
4291 where an inadvertent "Unhandled deferred opcode" message could be
4294 3) Example Code and Data Size
4296 These are the sizes for the OS-independent acpica.lib produced by the
4297 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
4298 includes the debug output trace mechanism and has a much larger code and
4303 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
4304 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
4306 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
4307 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
4309 ----------------------------------------
4310 22 September 2011. Summary of changes for version 20110922:
4314 Support for ACPI 5.0 in ACPICA has been underway for several months and
4316 be released at the same time that ACPI 5.0 is officially released.
4318 The ACPI 5.0 specification is on track for release in the next few
4321 1) ACPICA Core Subsystem:
4323 Fixed a problem where the maximum sleep time for the Sleep() operator was
4324 intended to be limited to two seconds, but was inadvertently limited to
4328 Linux and Unix makefiles: Added header file dependencies to ensure
4330 generation of ACPICA core code and utilities. Also simplified the
4332 considerably through the use of the vpath variable to specify search
4336 2) iASL Compiler/Disassembler and Tools:
4338 iASL: Implemented support to check the access length for all fields
4340 access named Resource Descriptor fields. For example, if a resource field
4342 defined to be two bits, a warning is issued if a CreateXxxxField() is
4344 with an incorrect bit length. This is implemented for all current
4346 descriptor names. ACPICA BZ 930.
4348 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
4352 iASL: Fixed a couple of issues associated with variable-length package
4353 objects. 1) properly handle constants like One, Ones, Zero -- do not make
4355 VAR_PACKAGE when these are used as a package length. 2) Allow the
4357 opcode (in addition to PACKAGE) when validating object types for
4361 iASL: Emit statistics for all output files (instead of just the ASL input
4363 AML output). Includes listings, hex files, etc.
4365 iASL: Added -G option to the table compiler to allow the compilation of
4367 ACPI tables. The only part of a table that is required is the standard
4372 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
4374 which also adds correct 64-bit support. Also, now all output filenames
4376 completely lower case.
4378 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
4379 loading table files. A warning is issued for any such tables. The only
4380 exception is an FADT. This also fixes a possible fault when attempting to
4382 non-AML tables. ACPICA BZ 932.
4384 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
4386 missing table terminator could cause a fault when using the -p option.
4388 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
4391 3) Example Code and Data Size
4393 These are the sizes for the OS-independent acpica.lib produced by the
4394 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
4395 includes the debug output trace mechanism and has a much larger code and
4399 Previous Release (VC 9.0):
4400 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
4401 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
4402 Current Release (VC 9.0):
4403 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
4404 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
4407 ----------------------------------------
4408 23 June 2011. Summary of changes for version 20110623:
4410 1) ACPI CA Core Subsystem:
4412 Updated the predefined name repair mechanism to not attempt repair of a
4414 return object if a _PSS object is present. We can only sort the _TSS
4416 package if there is no _PSS within the same scope. This is because if
4419 present, the ACPI specification dictates that the _TSS Power Dissipation
4421 is to be ignored, and therefore some BIOSs leave garbage values in the
4423 Power field(s). In this case, it is best to just return the _TSS package
4425 is. Reported by, and fixed with assistance from Fenghua Yu.
4427 Added an option to globally disable the control method return value
4429 and repair. This runtime option can be used to disable return value
4432 this is causing a problem on a particular machine. Also added an option
4434 AcpiExec (-dr) to set this disable flag.
4436 All makefiles and project files: Major changes to improve generation of
4438 tools. ACPICA BZ 912:
4439 Reduce default optimization levels to improve compatibility
4440 For Linux, add strict-aliasing=0 for gcc 4
4441 Cleanup and simplify use of command line defines
4442 Cleanup multithread library support
4443 Improve usage messages
4445 Linux-specific header: update handling of THREAD_ID and pthread. For the
4447 bit case, improve casting to eliminate possible warnings, especially with
4451 Example Code and Data Size: These are the sizes for the OS-independent
4452 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4454 version of the code includes the debug output trace mechanism and has a
4456 larger code and data size.
4458 Previous Release (VC 9.0):
4459 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
4460 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
4461 Current Release (VC 9.0):
4462 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
4463 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
4465 2) iASL Compiler/Disassembler and Tools:
4467 With this release, a new utility named "acpihelp" has been added to the
4469 package. This utility summarizes the ACPI specification chapters for the
4471 and AML languages. It generates under Linux/Unix as well as Windows, and
4472 provides the following functionality:
4473 Find/display ASL operator(s) -- with description and syntax.
4474 Find/display ASL keyword(s) -- with exact spelling and descriptions.
4475 Find/display ACPI predefined name(s) -- with description, number
4476 of arguments, and the return value data type.
4477 Find/display AML opcode name(s) -- with opcode, arguments, and
4479 Decode/display AML opcode -- with opcode name, arguments, and
4482 Service Layers: Make multi-thread support configurable. Conditionally
4484 the multi-thread support so that threading libraries will not be linked
4487 necessary. The only tool that requires multi-thread support is AcpiExec.
4489 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
4491 Bison appear to want the interface to yyerror to be a const char * (or at
4492 least this is a problem when generating iASL on some systems.) ACPICA BZ
4496 Tools: Fix for systems where O_BINARY is not defined. Only used for
4498 versions of the tools.
4500 ----------------------------------------
4501 27 May 2011. Summary of changes for version 20110527:
4503 1) ACPI CA Core Subsystem:
4505 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
4507 signature. Now, only allow SSDT, OEMx, and a null signature. History:
4508 1) Originally, we checked the table signature for "SSDT" or "PSDT".
4509 (PSDT is now obsolete.)
4510 2) We added support for OEMx tables, signature "OEM" plus a fourth
4511 "don't care" character.
4512 3) Valid tables were encountered with a null signature, so we just
4513 gave up on validating the signature, (05/2008).
4514 4) We encountered non-AML tables such as the MADT, which caused
4515 interpreter errors and kernel faults. So now, we once again allow
4516 only SSDT, OEMx, and now, also a null signature. (05/2011).
4518 Added the missing _TDL predefined name to the global name list in order
4520 enable validation. Affects both the core ACPICA code and the iASL
4523 Example Code and Data Size: These are the sizes for the OS-independent
4524 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4526 version of the code includes the debug output trace mechanism and has a
4528 larger code and data size.
4530 Previous Release (VC 9.0):
4531 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
4532 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
4533 Current Release (VC 9.0):
4534 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
4535 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
4537 2) iASL Compiler/Disassembler and Tools:
4539 Debugger/AcpiExec: Implemented support for "complex" method arguments on
4541 debugger command line. This adds support beyond simple integers --
4543 Strings, Buffers, and Packages. Includes support for nested packages.
4544 Increased the default command line buffer size to accommodate these
4546 See the ACPICA reference for details and syntax. ACPICA BZ 917.
4548 Debugger/AcpiExec: Implemented support for "default" method arguments for
4550 Execute/Debug command. Now, the debugger will always invoke a control
4552 with the required number of arguments -- even if the command line
4554 none or insufficient arguments. It uses default integer values for any
4556 arguments. Also fixes a bug where only six method arguments maximum were
4557 supported instead of the required seven.
4559 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
4561 also return status in order to prevent buffer overruns. See the ACPICA
4562 reference for details and syntax. ACPICA BZ 921
4564 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
4565 makefiles to simplify support for the two different but similar parser
4566 generators, bison and yacc.
4568 Updated the generic unix makefile for gcc 4. The default gcc version is
4570 expected to be 4 or greater, since options specific to gcc 4 are used.
4572 ----------------------------------------
4573 13 April 2011. Summary of changes for version 20110413:
4575 1) ACPI CA Core Subsystem:
4577 Implemented support to execute a so-called "orphan" _REG method under the
4579 device. This change will force the execution of a _REG method underneath
4582 device even if there is no corresponding operation region of type
4583 EmbeddedControl. Fixes a problem seen on some machines and apparently is
4584 compatible with Windows behavior. ACPICA BZ 875.
4586 Added more predefined methods that are eligible for automatic NULL
4588 element removal. This change adds another group of predefined names to
4591 of names that can be repaired by having NULL package elements dynamically
4592 removed. This group are those methods that return a single variable-
4594 package containing simple data types such as integers, buffers, strings.
4596 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
4599 and _TZD. ACPICA BZ 914.
4601 Split and segregated all internal global lock functions to a new file,
4604 Updated internal address SpaceID for DataTable regions. Moved this
4607 id in preparation for ACPI 5.0 changes that will include some new space
4610 change should not affect user/host code.
4612 Example Code and Data Size: These are the sizes for the OS-independent
4614 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
4616 the code includes the debug output trace mechanism and has a much larger
4621 Previous Release (VC 9.0):
4622 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
4623 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
4624 Current Release (VC 9.0):
4625 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
4626 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
4628 2) iASL Compiler/Disassembler and Tools:
4630 iASL/DTC: Major update for new grammar features. Allow generic data types
4632 custom ACPI tables. Field names are now optional. Any line can be split
4634 multiple lines using the continuation char (\). Large buffers now use
4636 continuation character(s) and no colon on the continuation lines. See the
4638 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
4641 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
4643 Since the parser stuffs a "zero" as the return value for these statements
4646 the underlying AML grammar), they were seen as "return with value" by the
4648 semantic checking. They are now seen correctly as "null" return
4651 iASL: Check if a_REG declaration has a corresponding Operation Region.
4653 check for each _REG to ensure that there is in fact a corresponding
4655 region declaration in the same scope. If not, the _REG method is not very
4657 since it probably won't be executed. ACPICA BZ 915.
4659 iASL/DTC: Finish support for expression evaluation. Added a new
4662 that implements c-style operator precedence and parenthesization. ACPICA
4666 Disassembler/DTC: Remove support for () and <> style comments in data
4669 that DTC has full expression support, we don't want to have comment
4672 start with a parentheses or a less-than symbol. Now, only the standard /*
4675 comments are supported, as well as the bracket [] comments.
4677 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
4679 headers in the acpidump file. Update the header validation to support
4681 tables. Problem introduced in previous AcpiXtract version in the change
4683 support "wrong checksum" error messages emitted by acpidump utility.
4685 iASL: Add a * option to generate all template files (as a synonym for
4689 "iasl -T *" or "iasl -T ALL".
4691 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
4693 abort the compiler on "fatal" errors, simply should abort the current
4695 This allows multiple compiles with a single (possibly wildcard) compiler
4698 ----------------------------------------
4699 16 March 2011. Summary of changes for version 20110316:
4701 1) ACPI CA Core Subsystem:
4703 Fixed a problem caused by a _PRW method appearing at the namespace root
4705 during the setup of wake GPEs. A fault could occur if a _PRW directly
4708 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
4710 Implemented support for "spurious" Global Lock interrupts. On some
4712 global lock interrupt can occur without the pending flag being set. Upon
4715 interrupt, we now ensure that a thread is actually waiting for the lock
4717 signaling GL availability. Rafael Wysocki, Bob Moore.
4719 Example Code and Data Size: These are the sizes for the OS-independent
4721 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
4723 the code includes the debug output trace mechanism and has a much larger
4728 Previous Release (VC 9.0):
4729 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
4730 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
4731 Current Release (VC 9.0):
4732 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
4733 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
4735 2) iASL Compiler/Disassembler and Tools:
4737 Implemented full support for the "SLIC" ACPI table. Includes support in
4739 header files, disassembler, table compiler, and template generator. Bob
4743 AcpiXtract: Correctly handle embedded comments and messages from
4745 Apparently some or all versions of acpidump will occasionally emit a
4748 "Wrong checksum", etc., into the dump file. This was causing problems for
4749 AcpiXtract. ACPICA BZ 905.
4751 iASL: Fix the Linux makefile by removing an inadvertent double file
4755 AcpiExec: Update installation of operation region handlers. Install one
4757 for a user-defined address space. This is used by the ASL test suite
4760 ----------------------------------------
4761 11 February 2011. Summary of changes for version 20110211:
4763 1) ACPI CA Core Subsystem:
4765 Added a mechanism to defer _REG methods for some early-installed
4767 Most user handlers should be installed before call to
4768 AcpiEnableSubsystem.
4769 However, Event handlers and region handlers should be installed after
4770 AcpiInitializeObjects. Override handlers for the "default" regions should
4772 installed early, however. This change executes all _REG methods for the
4773 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
4774 chicken/egg issues between them. ACPICA BZ 848.
4776 Implemented an optimization for GPE detection. This optimization will
4778 ignore GPE registers that contain no enabled GPEs -- there is no need to
4779 read the register since this information is available internally. This
4780 becomes more important on machines with a large GPE space. ACPICA
4782 884. Lin Ming. Suggestion from Joe Liu.
4784 Removed all use of the highly unreliable FADT revision field. The
4786 number in the FADT has been found to be completely unreliable and cannot
4788 trusted. Only the actual table length can be used to infer the version.
4790 change updates the ACPICA core and the disassembler so that both no
4792 even look at the FADT version and instead depend solely upon the FADT
4795 Fix an unresolved name issue for the no-debug and no-error-message source
4796 generation cases. The _AcpiModuleName was left undefined in these cases,
4798 it is actually needed as a parameter to some interfaces. Define
4799 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
4801 Split several large files (makefiles and project files updated)
4802 utglobal.c -> utdecode.c
4803 dbcomds.c -> dbmethod.c dbnames.c
4804 dsopcode.c -> dsargs.c dscontrol.c
4805 dsload.c -> dsload2.c
4806 aslanalyze.c -> aslbtypes.c aslwalks.c
4808 Example Code and Data Size: These are the sizes for the OS-independent
4809 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4810 debug version of the code includes the debug output trace mechanism and
4812 a much larger code and data size.
4814 Previous Release (VC 9.0):
4815 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
4816 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
4817 Current Release (VC 9.0):
4818 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
4819 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
4821 2) iASL Compiler/Disassembler and Tools:
4823 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
4824 These are useful C-style macros with the standard definitions. ACPICA
4827 iASL/DTC: Added support for integer expressions and labels. Support for
4829 expressions for all integer fields in all ACPI tables. Support for labels
4831 "generic" portions of tables such as UEFI. See the iASL reference manual.
4833 Debugger: Added a command to display the status of global handlers. The
4834 "handlers" command will display op region, fixed event, and miscellaneous
4835 global handlers. installation status -- and for op regions, whether
4837 or user-installed handler will be used.
4839 iASL: Warn if reserved method incorrectly returns a value. Many
4841 names are defined such that they do not return a value. If implemented as
4843 method, issue a warning if such a name explicitly returns a value. ACPICA
4846 iASL: Added detection of GPE method name conflicts. Detects a conflict
4848 there are two GPE methods of the form _Lxy and _Exy in the same scope.
4850 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
4852 iASL/DTC: Fixed a couple input scanner issues with comments and line
4853 numbers. Comment remover could get confused and miss a comment ending.
4855 a problem with line counter maintenance.
4857 iASL/DTC: Reduced the severity of some errors from fatal to error. There
4859 no need to abort on simple errors within a field definition.
4861 Debugger: Simplified the output of the help command. All help output now
4863 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
4865 ----------------------------------------
4866 12 January 2011. Summary of changes for version 20110112:
4868 1) ACPI CA Core Subsystem:
4870 Fixed a race condition between method execution and namespace walks that
4872 possibly cause a fault. The problem was apparently introduced in version
4873 20100528 as a result of a performance optimization that reduces the
4876 namespace walks upon method exit by using the delete_namespace_subtree
4877 function instead of the delete_namespace_by_owner function used
4879 Bug is a missing namespace lock in the delete_namespace_subtree function.
4880 dana.myers@oracle.com
4882 Fixed several issues and a possible fault with the automatic "serialized"
4883 method support. History: This support changes a method to "serialized" on
4885 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
4886 possibility that it cannot handle reentrancy. This fix repairs a couple
4888 issues seen in the field, especially on machines with many cores:
4890 1) Delete method children only upon the exit of the last thread,
4891 so as to not delete objects out from under other running threads
4892 (and possibly causing a fault.)
4893 2) Set the "serialized" bit for the method only upon the exit of the
4894 Last thread, so as to not cause deadlock when running threads
4896 3) Cleanup the use of the AML "MethodFlags" and internal method flags
4897 so that there is no longer any confusion between the two.
4899 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
4901 Debugger: Now lock the namespace for duration of a namespace dump.
4903 issues if the namespace is changing dynamically underneath the debugger.
4904 Especially affects temporary namespace nodes, since the debugger displays
4907 Updated the ordering of include files. The ACPICA headers should appear
4908 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
4910 any necessary compiler-specific defines, etc. Affects the ACPI-related
4914 Updated all ACPICA copyrights and signons to 2011. Added the 2011
4916 to all module headers and signons, including the Linux header. This
4918 virtually every file in the ACPICA core subsystem, iASL compiler, and all
4921 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
4922 project files for VC++ 6.0 are now obsolete. New project files can be
4924 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
4927 Example Code and Data Size: These are the sizes for the OS-independent
4928 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4929 debug version of the code includes the debug output trace mechanism and
4931 much larger code and data size.
4933 Previous Release (VC 6.0):
4934 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
4935 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
4936 Current Release (VC 9.0):
4937 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
4938 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
4940 2) iASL Compiler/Disassembler and Tools:
4942 iASL: Added generic data types to the Data Table compiler. Add "generic"
4944 types such as UINT32, String, Unicode, etc., to simplify the generation
4946 platform-defined tables such as UEFI. Lin Ming.
4948 iASL: Added listing support for the Data Table Compiler. Adds listing
4950 (-l) to display actual binary output for each line of input code.
4952 ----------------------------------------
4953 09 December 2010. Summary of changes for version 20101209:
4955 1) ACPI CA Core Subsystem:
4957 Completed the major overhaul of the GPE support code that was begun in
4959 2010. Major features include: removal of _PRW execution in ACPICA (host
4960 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
4961 changes to existing interfaces, simplification of GPE handler operation,
4963 a handful of new interfaces:
4969 One new file, evxfgpe.c to consolidate all external GPE interfaces.
4971 See the ACPICA Programmer Reference for full details and programming
4972 information. See the new section 4.4 "General Purpose Event (GPE)
4974 for a full overview, and section 8.7 "ACPI General Purpose Event
4976 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
4978 Bob Moore, Rafael Wysocki.
4980 Implemented a new GPE feature for Windows compatibility, the "Implicit
4982 GPE Notify". This feature will automatically issue a Notify(2) on a
4984 when a Wake GPE is received if there is no corresponding GPE method or
4985 handler. ACPICA BZ 870.
4987 Fixed a problem with the Scope() operator during table parse and load
4989 During load phase (table load or method execution), the scope operator
4991 not enter the target into the namespace. Instead, it should open a new
4993 at the target location. Linux BZ 19462, ACPICA BZ 882.
4995 Example Code and Data Size: These are the sizes for the OS-independent
4996 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4997 debug version of the code includes the debug output trace mechanism and
4999 much larger code and data size.
5002 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
5003 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
5005 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
5006 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
5008 2) iASL Compiler/Disassembler and Tools:
5010 iASL: Relax the alphanumeric restriction on _CID strings. These strings
5012 "bus-specific" per the ACPI specification, and therefore any characters
5014 acceptable. The only checks that can be performed are for a null string
5016 perhaps for a leading asterisk. ACPICA BZ 886.
5018 iASL: Fixed a problem where a syntax error that caused a premature EOF
5019 condition on the source file emitted a very confusing error message. The
5020 premature EOF is now detected correctly. ACPICA BZ 891.
5022 Disassembler: Decode the AccessSize within a Generic Address Structure
5024 access, word access, etc.) Note, this field does not allow arbitrary bit
5025 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
5027 New: AcpiNames utility - Example namespace dump utility. Shows an example
5029 ACPICA configuration for a minimal namespace dump utility. Uses table and
5030 namespace managers, but no AML interpreter. Does not add any
5032 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
5033 partition and configure ACPICA. ACPICA BZ 883.
5035 AML Debugger: Increased the debugger buffer size for method return
5037 Was 4K, increased to 16K. Also enhanced error messages for debugger
5039 execution, including the buffer overflow case.
5041 ----------------------------------------
5042 13 October 2010. Summary of changes for version 20101013:
5044 1) ACPI CA Core Subsystem:
5046 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
5048 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
5049 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
5051 Changed the type of the predefined namespace object _TZ from ThermalZone
5053 Device. This was found to be confusing to the host software that
5055 the various thermal zones, since _TZ is not really a ThermalZone.
5058 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
5061 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
5062 string is "Windows 2006 SP2".
5064 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
5066 code automatically repairs _HID-related strings, this type of code is no
5067 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
5070 Example Code and Data Size: These are the sizes for the OS-independent
5071 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5072 debug version of the code includes the debug output trace mechanism and
5074 much larger code and data size.
5077 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
5078 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
5080 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
5081 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
5083 2) iASL Compiler/Disassembler and Tools:
5085 iASL: Implemented additional compile-time validation for _HID strings.
5087 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
5090 the string must be exactly seven or eight characters. For both _HID and
5092 strings, all characters must be alphanumeric. ACPICA BZ 874.
5094 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
5095 descriptors that are mostly or all zeros, with the expectation that they
5097 be filled in at runtime. iASL now allows this as long as there is a
5099 tag" (name) associated with the descriptor, which gives the ASL a handle
5100 needed to modify the descriptor. ACPICA BZ 873.
5102 Added single-thread support to the generic Unix application OSL.
5104 for iASL support, this change removes the use of semaphores in the
5106 threaded ACPICA tools/applications - increasing performance. The
5107 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
5108 option. ACPICA BZ 879.
5110 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
5112 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
5114 iASL: Moved all compiler messages to a new file, aslmessages.h.
5116 ----------------------------------------
5117 15 September 2010. Summary of changes for version 20100915:
5119 1) ACPI CA Core Subsystem:
5121 Removed the AcpiOsDerivePciId OSL interface. The various host
5123 of this function were not OS-dependent and are now obsolete and can be
5124 removed from all host OSLs. This function has been replaced by
5125 AcpiHwDerivePciId, which is now part of the ACPICA core code.
5126 AcpiHwDerivePciId has been implemented without recursion. Adds one new
5127 module, hwpci.c. ACPICA BZ 857.
5129 Implemented a dynamic repair for _HID and _CID strings. The following
5130 problems are now repaired at runtime: 1) Remove a leading asterisk in the
5131 string, and 2) the entire string is uppercased. Both repairs are in
5132 accordance with the ACPI specification and will simplify host driver
5136 The ACPI_THREAD_ID type is no longer configurable, internally it is now
5137 always UINT64. This simplifies the ACPICA code, especially any printf
5139 UINT64 is the only common data type for all thread_id types across all
5140 operating systems. It is now up to the host OSL to cast the native
5142 type to UINT64 before returning the value to ACPICA (via
5144 Lin Ming, Bob Moore.
5146 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
5148 keyword is not standard across compilers, and this type allows inline to
5150 configured on a per-compiler basis. Lin Ming.
5152 Made the system global AcpiGbl_SystemAwakeAndRunning publically
5154 Added an extern for this boolean in acpixf.h. Some hosts utilize this
5156 during suspend/restore operations. ACPICA BZ 869.
5158 All code that implements error/warning messages with the "ACPI:" prefix
5160 been moved to a new module, utxferror.c.
5162 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
5164 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
5166 Example Code and Data Size: These are the sizes for the OS-independent
5167 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5168 debug version of the code includes the debug output trace mechanism and
5170 much larger code and data size.
5173 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
5174 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
5176 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
5177 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
5179 2) iASL Compiler/Disassembler and Tools:
5181 iASL/Disassembler: Write ACPI errors to stderr instead of the output
5183 This keeps the output files free of random error messages that may
5185 from within the namespace/interpreter code. Used this opportunity to
5187 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
5188 866. Lin Ming, Bob Moore.
5190 Tools: update some printfs for ansi warnings on size_t. Handle width
5192 of size_t on 32-bit versus 64-bit generations. Lin Ming.
5194 ----------------------------------------
5195 06 August 2010. Summary of changes for version 20100806:
5197 1) ACPI CA Core Subsystem:
5199 Designed and implemented a new host interface to the _OSI support code.
5201 will allow the host to dynamically add or remove multiple _OSI strings,
5203 well as install an optional handler that is called for each _OSI
5205 Also added a new AML debugger command, 'osi' to display and modify the
5207 _OSI string table, and test support in the AcpiExec utility. See the
5209 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
5211 AcpiInstallInterface - Add an _OSI string.
5212 AcpiRemoveInterface - Delete an _OSI string.
5213 AcpiInstallInterfaceHandler - Install optional _OSI handler.
5215 AcpiOsValidateInterface - no longer used.
5217 source/components/utilities/utosi.c
5219 Re-introduced the support to enable multi-byte transfers for Embedded
5220 Controller (EC) operation regions. A reported problem was found to be a
5222 in the host OS, not in the multi-byte support. Previously, the maximum
5224 size passed to the EC operation region handler was a single byte. There
5226 often EC Fields larger than one byte that need to be transferred, and it
5228 useful for the EC driver to lock these as a single transaction. This
5230 enables single transfers larger than 8 bits. This effectively changes the
5231 access to the EC space from ByteAcc to AnyAcc, and will probably require
5232 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
5234 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
5236 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
5237 prototype in acpiosxf.h had the output value pointer as a (void *).
5238 It should be a (UINT64 *). This may affect some host OSL code.
5240 Fixed a couple problems with the recently modified Linux makefiles for
5242 and AcpiExec. These new makefiles place the generated object files in the
5243 local directory so that there can be no collisions between the files that
5245 shared between them that are compiled with different options.
5247 Example Code and Data Size: These are the sizes for the OS-independent
5248 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5249 debug version of the code includes the debug output trace mechanism and
5251 much larger code and data size.
5254 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
5255 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
5257 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
5258 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
5260 2) iASL Compiler/Disassembler and Tools:
5262 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
5264 namespace from and disassemble an entire group of AML files. Useful for
5265 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
5267 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
5269 iASL: Allow multiple invocations of -e option. This change allows
5271 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
5275 ----------------------------------------
5276 02 July 2010. Summary of changes for version 20100702:
5278 1) ACPI CA Core Subsystem:
5280 Implemented several updates to the recently added GPE reference count
5281 support. The model for "wake" GPEs is changing to give the host OS
5283 control of these GPEs. Eventually, the ACPICA core will not execute any
5285 methods, since the host already must execute them. Also, additional
5287 were made to help ensure that the reference counts are kept in proper
5288 synchronization with reality. Rafael J. Wysocki.
5290 1) Ensure that GPEs are not enabled twice during initialization.
5291 2) Ensure that GPE enable masks stay in sync with the reference count.
5292 3) Do not inadvertently enable GPEs when writing GPE registers.
5293 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
5294 interface. This interface will set or clear individual GPEs for wakeup.
5295 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
5297 are now used for "runtime" GPEs only.
5299 Changed the behavior of the GPE install/remove handler interfaces. The
5302 no longer disabled during this process, as it was found to cause problems
5304 some machines. Rafael J. Wysocki.
5306 Reverted a change introduced in version 20100528 to enable Embedded
5307 Controller multi-byte transfers. This change was found to cause problems
5309 Index Fields and possibly Bank Fields. It will be reintroduced when these
5310 problems have been resolved.
5312 Fixed a problem with references to Alias objects within Package Objects.
5314 reference to an Alias within the definition of a Package was not always
5315 resolved properly. Aliases to objects like Processors, Thermal zones,
5317 were resolved to the actual object instead of a reference to the object
5320 should be. Package objects are only allowed to contain integer, string,
5321 buffer, package, and reference objects. Redhat bugzilla 608648.
5323 Example Code and Data Size: These are the sizes for the OS-independent
5324 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5325 debug version of the code includes the debug output trace mechanism and
5327 much larger code and data size.
5330 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
5331 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
5333 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
5334 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
5336 2) iASL Compiler/Disassembler and Tools:
5338 iASL: Implemented a new compiler subsystem to allow definition and
5339 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
5341 are called "ACPI Data Tables", and the new compiler is the "Data Table
5342 Compiler". This compiler is intended to simplify the existing error-prone
5343 process of creating these tables for the BIOS, as well as allowing the
5344 disassembly, modification, recompilation, and override of existing ACPI
5346 tables. See the iASL User Guide for detailed information.
5348 iASL: Implemented a new Template Generator option in support of the new
5350 Table Compiler. This option will create examples of all known ACPI tables
5351 that can be used as the basis for table development. See the iASL
5352 documentation and the -T option.
5354 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
5357 Updated the Linux makefiles for iASL and AcpiExec to place the generated
5358 object files in the local directory so that there can be no collisions
5359 between the shared files between them that are generated with different
5362 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
5364 the #define __APPLE__ to enable this support.
5366 ----------------------------------------
5367 28 May 2010. Summary of changes for version 20100528:
5369 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
5370 available at www.acpi.info. This is primarily an errata release.
5372 1) ACPI CA Core Subsystem:
5374 Undefined ACPI tables: We are looking for the definitions for the
5376 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
5378 Implemented support to enable multi-byte transfers for Embedded
5380 (EC) operation regions. Previously, the maximum data size passed to the
5382 operation region handler was a single byte. There are often EC Fields
5384 than one byte that need to be transferred, and it is useful for the EC
5386 to lock these as a single transaction. This change enables single
5388 larger than 8 bits. This effectively changes the access to the EC space
5390 ByteAcc to AnyAcc, and will probably require changes to the host OS
5392 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
5394 transfers. Alexey Starikovskiy, Lin Ming
5396 Implemented a performance enhancement for namespace search and access.
5398 change enhances the performance of namespace searches and walks by adding
5400 backpointer to the parent in each namespace node. On large namespaces,
5402 change can improve overall ACPI performance by up to 9X. Adding a pointer
5404 each namespace node increases the overall size of the internal namespace
5406 about 5%, since each namespace entry usually consists of both a namespace
5407 node and an ACPI operand object. However, this is the first growth of the
5408 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
5410 Implemented a performance optimization that reduces the number of
5412 walks. On control method exit, only walk the namespace if the method is
5414 to have created namespace objects outside of its local scope. Previously,
5416 entire namespace was traversed on each control method exit. This change
5418 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
5421 Added support to truncate I/O addresses to 16 bits for Windows
5423 Some ASL code has been seen in the field that inadvertently has bits set
5424 above bit 15. This feature is optional and is enabled if the BIOS
5426 any Windows OSI strings. It can also be enabled by the host OS. Matthew
5429 Added support to limit the maximum time for the ASL Sleep() operator. To
5430 prevent accidental deep sleeps, limit the maximum time that Sleep() will
5431 actually sleep. Configurable, the default maximum is two seconds. ACPICA
5434 Added run-time validation support for the _WDG and_WED Microsoft
5436 methods. These objects are defined by "Windows Instrumentation", and are
5438 part of the ACPI spec. ACPICA BZ 860.
5440 Expanded all statistic counters used during namespace and device
5441 initialization from 16 to 32 bits in order to support very large
5444 Replaced all instances of %d in printf format specifiers with %u since
5446 all integers in ACPICA are unsigned.
5448 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
5452 Example Code and Data Size: These are the sizes for the OS-independent
5453 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5454 debug version of the code includes the debug output trace mechanism and
5456 much larger code and data size.
5459 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
5460 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
5462 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
5463 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
5465 2) iASL Compiler/Disassembler and Tools:
5467 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
5468 methods. These objects are defined by "Windows Instrumentation", and are
5470 part of the ACPI spec. ACPICA BZ 860.
5472 AcpiExec: added option to disable the memory tracking mechanism. The -dt
5473 option will disable the tracking mechanism, which improves performance
5476 AcpiExec: Restructured the command line options into -d (disable) and -e
5479 ----------------------------------------
5480 28 April 2010. Summary of changes for version 20100428:
5482 1) ACPI CA Core Subsystem:
5484 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
5485 including FADT-based and GPE Block Devices, execute any _PRW methods in
5487 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
5488 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
5489 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
5490 Devices. Provides compatibility with other ACPI implementations. Two new
5491 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
5494 Fixed a regression introduced in version 20100331 within the table
5496 where initial table loading could fail. This was introduced in the fix
5498 AcpiReallocateRootTable. Also, renamed some of fields in the table
5500 data structures to clarify their meaning and use.
5502 Fixed a possible allocation overrun during internal object copy in
5503 AcpiUtCopySimpleObject. The original code did not correctly handle the
5505 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
5508 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
5509 possible access beyond end-of-allocation. Also, now fully validate
5511 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
5513 Example Code and Data Size: These are the sizes for the OS-independent
5514 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5515 debug version of the code includes the debug output trace mechanism and
5517 much larger code and data size.
5520 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
5521 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
5523 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
5524 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
5526 2) iASL Compiler/Disassembler and Tools:
5528 iASL: Implemented Min/Max/Len/Gran validation for address resource
5529 descriptors. This change implements validation for the address fields
5531 are common to all address-type resource descriptors. These checks are
5532 implemented: Checks for valid Min/Max, length within the Min/Max window,
5533 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
5535 table 6-40 in the ACPI 4.0a specification. Also split the large
5537 and aslrestype2.c files into five new files. ACPICA BZ 840.
5539 iASL: Added support for the _Wxx predefined names. This support was
5541 and these names were not recognized by the compiler as valid predefined
5542 names. ACPICA BZ 851.
5544 iASL: Added an error for all predefined names that are defined to return
5546 value and thus must be implemented as Control Methods. These include all
5548 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
5549 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
5551 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
5553 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
5555 dynamically loaded via the Load() operator. Also cleaned up output for
5558 ta and -tc options. ACPICA BZ 853.
5560 Tests: Added a new file with examples of extended iASL error checking.
5561 Demonstrates the advanced error checking ability of the iASL compiler.
5562 Available at tests/misc/badcode.asl.
5564 ----------------------------------------
5565 31 March 2010. Summary of changes for version 20100331:
5567 1) ACPI CA Core Subsystem:
5569 Completed a major update for the GPE support in order to improve support
5571 shared GPEs and to simplify both host OS and ACPICA code. Added a
5573 count mechanism to support shared GPEs that require multiple device
5575 Several external interfaces have changed. One external interface has been
5576 removed. One new external interface was added. Most of the GPE external
5577 interfaces now use the GPE spinlock instead of the events mutex (and the
5578 Flags parameter for many GPE interfaces has been removed.) See the
5580 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
5582 Wysocki. ACPICA BZ 831.
5585 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
5591 Implemented write support for DataTable operation regions. These regions
5593 defined via the DataTableRegion() operator. Previously, only read support
5595 implemented. The ACPI specification allows DataTableRegions to be
5599 Implemented a new subsystem option to force a copy of the DSDT to local
5600 memory. Optionally copy the entire DSDT to local memory (instead of
5602 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
5604 the original DSDT, creating the need for this option. Default is FALSE,
5608 Implemented detection of a corrupted or replaced DSDT. This change adds
5609 support to detect a DSDT that has been corrupted and/or replaced from
5611 the OS (by firmware). This is typically catastrophic for the system, but
5613 been seen on some machines. Once this problem has been detected, the DSDT
5614 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
5616 Fixed two problems with AcpiReallocateRootTable during the root table
5618 When copying the root table to the new allocation, the length used was
5619 incorrect. The new size was used instead of the current table size,
5621 too much data was copied. Also, the count of available slots for ACPI
5623 was not set correctly. Alexey Starikovskiy, Bob Moore.
5625 Example Code and Data Size: These are the sizes for the OS-independent
5626 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5627 debug version of the code includes the debug output trace mechanism and
5629 much larger code and data size.
5632 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
5633 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
5635 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
5636 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
5638 2) iASL Compiler/Disassembler and Tools:
5640 iASL: Implement limited typechecking for values returned from predefined
5641 control methods. The type of any returned static (unnamed) object is now
5642 validated. For example, Return(1). ACPICA BZ 786.
5644 iASL: Fixed a predefined name object verification regression. Fixes a
5646 introduced in version 20100304. An error is incorrectly generated if a
5647 predefined name is declared as a static named object with a value defined
5648 using the keywords "Zero", "One", or "Ones". Lin Ming.
5650 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
5652 reducing the requested registry access rights. ACPICA BZ 842.
5654 Disassembler: fixed a possible fault when generating External()
5656 Introduced in commit ae7d6fd: Properly handle externals with parent-
5658 (carat). Fixes a string length allocation calculation. Lin Ming.
5660 ----------------------------------------
5661 04 March 2010. Summary of changes for version 20100304:
5663 1) ACPI CA Core Subsystem:
5665 Fixed a possible problem with the AML Mutex handling function
5666 AcpiExReleaseMutex where the function could fault under the very rare
5667 condition when the interpreter has blocked, the interpreter lock is
5669 the interpreter is then reentered via the same thread, and attempts to
5670 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
5674 Implemented additional configuration support for the AML "Debug Object".
5675 Output from the debug object can now be enabled via a global variable,
5676 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
5678 This debug output is now available in the release version of ACPICA
5680 of just the debug version. Also, the entire debug output module can now
5682 configured out of the ACPICA build if desired. One new file added,
5683 executer/exdebug.c. Lin Ming, Bob Moore.
5685 Added header support for the ACPI MCHI table (Management Controller Host
5686 Interface Table). This table was added in ACPI 4.0, but the defining
5688 has only recently become available.
5690 Standardized output of integer values for ACPICA warnings/errors. Always
5692 0x prefix for hex output, always use %u for unsigned integer decimal
5694 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
5696 invocations.) These invocations were converted from the original
5697 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
5699 Example Code and Data Size: These are the sizes for the OS-independent
5700 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5701 debug version of the code includes the debug output trace mechanism and
5703 much larger code and data size.
5706 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
5707 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
5709 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
5710 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
5712 2) iASL Compiler/Disassembler and Tools:
5714 iASL: Implemented typechecking support for static (non-control method)
5715 predefined named objects that are declared with the Name() operator. For
5716 example, the type of this object is now validated to be of type Integer:
5717 Name(_BBN, 1). This change migrates the compiler to using the core
5719 name table instead of maintaining a local version. Added a new file,
5720 aslpredef.c. ACPICA BZ 832.
5722 Disassembler: Added support for the ACPI 4.0 MCHI table.
5724 ----------------------------------------
5725 21 January 2010. Summary of changes for version 20100121:
5727 1) ACPI CA Core Subsystem:
5729 Added the 2010 copyright to all module headers and signons. This affects
5730 virtually every file in the ACPICA core subsystem, the iASL compiler, the
5731 tools/utilities, and the test suites.
5733 Implemented a change to the AcpiGetDevices interface to eliminate
5735 invocations of the _STA method. In the case where a specific _HID is
5736 requested, do not run _STA until a _HID match is found. This eliminates
5737 potentially dozens of _STA calls during a search for a particular
5739 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
5741 Implemented an additional repair for predefined method return values.
5743 to repair unexpected NULL elements within returned Package objects.
5746 Integer of value zero, a NULL String, or a zero-length Buffer as
5748 ACPICA BZ 818. Lin Ming, Bob Moore.
5750 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
5752 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
5754 64-bit AML integers). It is now obsolete and this change removes it from
5756 ACPICA code base, replaced by UINT64. The original typedef has been
5758 for now for compatibility with existing device driver code. ACPICA BZ
5761 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
5763 the parse tree object.
5765 Added additional warning options for the gcc-4 generation. Updated the
5767 accordingly. This includes some code restructuring to eliminate
5769 code, elimination of some gotos, elimination of unused return values,
5771 additional casting, and removal of redundant declarations.
5773 Example Code and Data Size: These are the sizes for the OS-independent
5774 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5775 debug version of the code includes the debug output trace mechanism and
5777 much larger code and data size.
5780 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
5781 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
5783 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
5784 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
5786 2) iASL Compiler/Disassembler and Tools:
5788 No functional changes for this release.
5790 ----------------------------------------
5791 14 December 2009. Summary of changes for version 20091214:
5793 1) ACPI CA Core Subsystem:
5795 Enhanced automatic data type conversions for predefined name repairs.
5797 change expands the automatic repairs/conversions for predefined name
5799 values to make Integers, Strings, and Buffers fully interchangeable.
5802 Buffer can be converted to a Package of Integers if necessary. The
5804 module was completely restructured. Lin Ming, Bob Moore.
5806 Implemented automatic removal of null package elements during predefined
5808 repairs. This change will automatically remove embedded and trailing NULL
5809 package elements from returned package objects that are defined to
5812 variable number of sub-packages. The driver is then presented with a
5814 with no null elements to deal with. ACPICA BZ 819.
5816 Implemented a repair for the predefined _FDE and _GTM names. The expected
5817 return value for both names is a Buffer of 5 DWORDs. This repair fixes
5819 possible problems (both seen in the field), where a package of integers
5821 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
5824 Implemented additional module-level code support. This change will
5826 execute module-level code that is not at the root of the namespace (under
5828 Device object, etc.). Now executes the code within the current scope
5830 of the root. ACPICA BZ 762. Lin Ming.
5832 Fixed possible mutex acquisition errors when running _REG methods. Fixes
5834 problem where mutex errors can occur when running a _REG method that is
5836 the same scope as a method-defined operation region or an operation
5838 under a module-level IF block. This type of code is rare, so the problem
5840 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
5842 Fixed a possible memory leak during module-level code execution. An
5844 could be leaked for each block of executed module-level code if the
5845 interpreter slack mode is enabled This change deletes any implicitly
5847 object from the module-level code block. Lin Ming.
5849 Removed messages for successful predefined repair(s). The repair
5851 was considered too wordy. Now, messages are only unconditionally emitted
5853 the return object cannot be repaired. Existing messages for successful
5854 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
5857 Example Code and Data Size: These are the sizes for the OS-independent
5858 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5859 debug version of the code includes the debug output trace mechanism and
5861 much larger code and data size.
5864 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
5865 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
5867 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
5868 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
5870 2) iASL Compiler/Disassembler and Tools:
5872 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
5874 were no longer automatically removed at the termination of the compile.
5876 acpiexec: Implemented the -f option to specify default region fill value.
5877 This option specifies the value used to initialize buffers that simulate
5878 operation regions. Default value is zero. Useful for debugging problems
5880 depend on a specific initial value for a region or field.
5882 ----------------------------------------
5883 12 November 2009. Summary of changes for version 20091112:
5885 1) ACPI CA Core Subsystem:
5887 Implemented a post-order callback to AcpiWalkNamespace. The existing
5888 interface only has a pre-order callback. This change adds an additional
5889 parameter for a post-order callback which will be more useful for bus
5891 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
5893 Modified the behavior of the operation region memory mapping cache for
5894 SystemMemory. Ensure that the memory mappings created for operation
5896 do not cross 4K page boundaries. Crossing a page boundary while mapping
5897 regions can cause kernel warnings on some hosts if the pages have
5899 attributes. Such regions are probably BIOS bugs, and this is the
5901 Linux BZ 14445. Lin Ming.
5903 Implemented an automatic repair for predefined methods that must return
5904 sorted lists. This change will repair (by sorting) packages returned by
5906 _PSS, and _TSS. Drivers can now assume that the packages are correctly
5908 and do not contain NULL package elements. Adds one new file,
5909 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
5911 Fixed a possible fault during predefined name validation if a return
5913 object contains NULL elements. Also adds a warning if a NULL element is
5914 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
5916 include repair or removal of all such NULL elements where possible.
5918 Implemented additional module-level executable AML code support. This
5920 will execute module-level code that is not at the root of the namespace
5921 (under a Device object, etc.) at table load time. Module-level executable
5923 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
5925 Implemented a new internal function to create Integer objects. This
5927 simplifies miscellaneous object creation code. ACPICA BZ 823.
5929 Reduced the severity of predefined repair messages, Warning to Info.
5931 the object was successfully repaired, a warning is too severe. Reduced to
5933 info message for now. These messages may eventually be changed to debug-
5937 Example Code and Data Size: These are the sizes for the OS-independent
5938 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5939 debug version of the code includes the debug output trace mechanism and
5941 much larger code and data size.
5944 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
5945 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
5947 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
5948 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
5950 2) iASL Compiler/Disassembler and Tools:
5952 iASL: Implemented Switch() with While(1) so that Break works correctly.
5954 change correctly implements the Switch operator with a surrounding
5956 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
5958 iASL: Added a message if a package initializer list is shorter than
5960 length. Adds a new remark for a Package() declaration if an initializer
5962 exists, but is shorter than the declared length of the package. Although
5963 technically legal, this is probably a coding error and it is seen in the
5964 field. ACPICA BZ 815. Lin Ming, Bob Moore.
5966 iASL: Fixed a problem where the compiler could fault after the maximum
5968 of errors was reached (200).
5970 acpixtract: Fixed a possible warning for pointer cast if the compiler
5972 level set very high.
5974 ----------------------------------------
5975 13 October 2009. Summary of changes for version 20091013:
5977 1) ACPI CA Core Subsystem:
5979 Fixed a problem where an Operation Region _REG method could be executed
5981 than once. If a custom address space handler is installed by the host
5983 the "initialize operation regions" phase of the ACPICA initialization,
5985 _REG methods for that address space could be executed twice. This change
5986 fixes the problem. ACPICA BZ 427. Lin Ming.
5988 Fixed a possible memory leak for the Scope() ASL operator. When the exact
5989 invocation of "Scope(\)" is executed (change scope to root), one internal
5990 operand object was leaked. Lin Ming.
5992 Implemented a run-time repair for the _MAT predefined method. If the _MAT
5993 return value is defined as a Field object in the AML, and the field
5994 size is less than or equal to the default width of an integer (32 or
5996 can incorrectly return an Integer instead of a Buffer. ACPICA now
5997 automatically repairs this problem. ACPICA BZ 810.
5999 Implemented a run-time repair for the _BIF and _BIX predefined methods.
6001 "OEM Information" field is often incorrectly returned as an Integer with
6002 value zero if the field is not supported by the platform. This is due to
6004 ambiguity in the ACPI specification. The field should always be a string.
6005 ACPICA now automatically repairs this problem by returning a NULL string
6006 within the returned Package. ACPICA BZ 807.
6008 Example Code and Data Size: These are the sizes for the OS-independent
6009 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6010 debug version of the code includes the debug output trace mechanism and
6012 much larger code and data size.
6015 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
6016 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
6018 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
6019 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
6021 2) iASL Compiler/Disassembler and Tools:
6023 Disassembler: Fixed a problem where references to external symbols that
6024 contained one or more parent-prefixes (carats) were not handled
6026 possibly causing a fault. ACPICA BZ 806. Lin Ming.
6028 Disassembler: Restructured the code so that all functions that handle
6029 external symbols are in a single module. One new file is added,
6032 AML Debugger: Added a max count argument for the Batch command (which
6033 executes multiple predefined methods within the namespace.)
6035 iASL: Updated the compiler documentation (User Reference.) Available at
6036 http://www.acpica.org/documentation/. ACPICA BZ 750.
6038 AcpiXtract: Updated for Lint and other formatting changes. Close all open
6041 ----------------------------------------
6042 03 September 2009. Summary of changes for version 20090903:
6044 1) ACPI CA Core Subsystem:
6046 For Windows Vista compatibility, added the automatic execution of an _INI
6047 method located at the namespace root (\_INI). This method is executed at
6048 table load time. This support is in addition to the automatic execution
6050 \_SB._INI. Lin Ming.
6052 Fixed a possible memory leak in the interpreter for AML package objects
6054 the package initializer list is longer than the defined size of the
6056 This apparently can only happen if the BIOS changes the package size on
6058 fly (seen in a _PSS object), as ASL compilers do not allow this. The
6059 interpreter will truncate the package to the defined size (and issue an
6061 message), but previously could leave the extra objects undeleted if they
6063 pre-created during the argument processing (such is the case if the
6065 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
6067 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
6068 This has been reported in the field. Previously, ACPICA would zero out
6070 buffer/string. Now, the operation is treated as a noop. Provides Windows
6071 compatibility. ACPICA BZ 803. Lin Ming.
6073 Removed an extraneous error message for ASL constructs of the form
6074 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
6076 are seen in many BIOSs and are once again treated as NOOPs and no error
6078 emitted when they are encountered. ACPICA BZ 785.
6080 Fixed an extraneous warning message if a _DSM reserved method returns a
6081 Package object. _DSM can return any type of object, so validation on the
6082 return type cannot be performed. ACPICA BZ 802.
6084 Example Code and Data Size: These are the sizes for the OS-independent
6085 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6086 debug version of the code includes the debug output trace mechanism and
6088 much larger code and data size.
6091 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
6092 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
6094 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
6095 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
6097 2) iASL Compiler/Disassembler and Tools:
6099 iASL: Fixed a problem with the use of the Alias operator and Resource
6100 Templates. The correct alias is now constructed and no error is emitted.
6103 iASL: Implemented the -I option to specify additional search directories
6105 include files. Allows multiple additional search paths for include files.
6106 Directories are searched in the order specified on the command line
6108 the local directory is searched.) ACPICA BZ 800.
6110 iASL: Fixed a problem where the full pathname for include files was not
6111 emitted for warnings/errors. This caused the IDE support to not work
6112 properly. ACPICA BZ 765.
6114 iASL: Implemented the -@ option to specify a Windows-style response file
6115 containing additional command line options. ACPICA BZ 801.
6117 AcpiExec: Added support to load multiple AML files simultaneously (such
6120 DSDT and multiple SSDTs). Also added support for wildcards within the AML
6121 pathname. These features allow all machine tables to be easily loaded and
6122 debugged together. ACPICA BZ 804.
6124 Disassembler: Added missing support for disassembly of HEST table Error
6128 ----------------------------------------
6129 30 July 2009. Summary of changes for version 20090730:
6131 The ACPI 4.0 implementation for ACPICA is complete with this release.
6133 1) ACPI CA Core Subsystem:
6135 ACPI 4.0: Added header file support for all new and changed ACPI tables.
6136 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
6138 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
6140 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
6142 have been some ACPI 4.0 changes to other existing tables. Split the large
6143 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
6145 ACPI 4.0: Implemented predefined name validation for all new names. There
6147 31 new names in ACPI 4.0. The predefined validation module was split into
6149 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
6151 Implemented support for so-called "module-level executable code". This is
6152 executable AML code that exists outside of any control method and is
6154 to be executed at table load time. Although illegal since ACPI 2.0, this
6156 of code still exists and is apparently still being created. Blocks of
6158 code are now detected and executed as intended. Currently, the code
6160 must exist under either an If, Else, or While construct; these are the
6161 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
6163 Implemented an automatic dynamic repair for predefined names that return
6164 nested Package objects. This applies to predefined names that are defined
6166 return a variable-length Package of sub-packages. If the number of sub-
6167 packages is one, BIOS code is occasionally seen that creates a simple
6169 package with no sub-packages. This code attempts to fix the problem by
6170 wrapping a new package object around the existing package. These methods
6172 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
6176 Fixed a regression introduced in 20090625 for the AcpiGetDevices
6178 The _HID/_CID matching was broken and no longer matched IDs correctly.
6182 Fixed a problem with AcpiReset where the reset would silently fail if the
6183 register was one of the protected I/O ports. AcpiReset now bypasses the
6185 validation mechanism. This may eventually be driven into the
6189 Fixed a regression related to the recent update of the AcpiRead/Write
6190 interfaces. A sleep/suspend could fail if the optional PM2 Control
6192 does not exist during an attempt to write the Bus Master Arbitration bit.
6193 (However, some hosts already delete the code that writes this bit, and
6195 code may in fact be obsolete at this date.) ACPICA BZ 799.
6197 Fixed a problem where AcpiTerminate could fault if inadvertently called
6199 in succession. ACPICA BZ 795.
6201 Example Code and Data Size: These are the sizes for the OS-independent
6202 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6203 debug version of the code includes the debug output trace mechanism and
6205 much larger code and data size.
6208 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
6209 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
6211 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
6212 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
6214 2) iASL Compiler/Disassembler and Tools:
6216 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
6217 changes to existing tables. ACPICA BZ 775.
6219 ----------------------------------------
6220 25 June 2009. Summary of changes for version 20090625:
6222 The ACPI 4.0 Specification was released on June 16 and is available at
6223 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
6224 continue for the next few releases.
6226 1) ACPI CA Core Subsystem:
6228 ACPI 4.0: Implemented interpreter support for the IPMI operation region
6229 address space. Includes support for bi-directional data buffers and an
6231 address space handler (to be installed by an IPMI device driver.) ACPICA
6235 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
6237 support in both the header files and the disassembler.
6239 Completed a major update for the AcpiGetObjectInfo external interface.
6241 - Support for variable, unlimited length HID, UID, and CID strings.
6242 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
6244 - Call the _SxW power methods on behalf of a device object.
6245 - Determine if a device is a PCI root bridge.
6246 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
6247 These changes will require an update to all callers of this interface.
6249 the updated ACPICA Programmer Reference for details. One new source file
6251 been added - utilities/utids.c. ACPICA BZ 368, 780.
6253 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
6254 transfers. The Value parameter has been extended from 32 bits to 64 bits
6256 order to support new ACPI 4.0 tables. These changes will require an
6259 all callers of these interfaces. See the ACPICA Programmer Reference for
6260 details. ACPICA BZ 768.
6262 Fixed several problems with AcpiAttachData. The handler was not invoked
6264 the host node was deleted. The data sub-object was not automatically
6266 when the host node was deleted. The interface to the handler had an
6268 parameter, this was removed. ACPICA BZ 778.
6270 Enhanced the function that dumps ACPI table headers. All non-printable
6271 characters in the string fields are now replaced with '?' (Signature,
6273 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
6274 these fields are occasionally seen in the field. ACPICA BZ 788.
6276 Fixed a problem with predefined method repair code where the code that
6277 attempts to repair/convert an object of incorrect type is only executed
6279 the first time the predefined method is called. The mechanism that
6281 warnings on subsequent calls was interfering with the repair mechanism.
6284 Fixed a possible memory leak in the predefined validation/repair code
6287 buffer is automatically converted to an expected string object.
6289 Removed obsolete 16-bit files from the distribution and from the current
6291 tree head. ACPICA BZ 776.
6293 Example Code and Data Size: These are the sizes for the OS-independent
6294 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6295 debug version of the code includes the debug output trace mechanism and
6297 much larger code and data size.
6300 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
6301 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
6303 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
6304 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
6306 2) iASL Compiler/Disassembler and Tools:
6308 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
6309 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
6311 ACPI 4.0: iASL - implemented compile-time validation support for all new
6312 predefined names and control methods (31 total). ACPICA BZ 769.
6314 ----------------------------------------
6315 21 May 2009. Summary of changes for version 20090521:
6317 1) ACPI CA Core Subsystem:
6319 Disabled the preservation of the SCI enable bit in the PM1 control
6321 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
6324 a "preserved" bit - "OSPM always preserves this bit position", section
6325 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
6326 because the bit needs to be explicitly set by the OS as a workaround. No
6327 machines fail if the bit is not preserved. Therefore, ACPICA no longer
6328 attempts to preserve this bit.
6330 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
6331 incorrectly formed _PRT package could cause a fault. Added validation to
6332 ensure that each package element is actually a sub-package.
6334 Implemented a new interface to install or override a single control
6336 AcpiInstallMethod. This interface is useful when debugging in order to
6338 an existing method or to install a missing method without having to
6340 the entire ACPI table. See the ACPICA Programmer Reference for use and
6341 examples. Lin Ming, Bob Moore.
6343 Fixed several reference count issues with the DdbHandle object that is
6344 created from a Load or LoadTable operator. Prevent premature deletion of
6346 object. Also, mark the object as invalid once the table has been
6348 This is needed because the handle itself may not be deleted after the
6350 unload, depending on whether it has been stored in a named object by the
6353 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
6354 mutexes of the same sync level are acquired but then not released in
6356 opposite order, the internally maintained Current Sync Level becomes
6358 and can cause subsequent execution errors. ACPICA BZ 471.
6360 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
6361 specification has been changed to make the SyncLevel for mutex objects
6363 useful. When releasing a mutex, the SyncLevel of the mutex must now be
6365 same as the current sync level. This makes more sense than the previous
6367 (SyncLevel less than or equal). This change updates the code to match the
6370 Fixed a problem with the local version of the AcpiOsPurgeCache function.
6372 (local) cache must be locked during all cache object deletions. Andrew
6375 Updated the Load operator to use operation region interfaces. This
6377 direct memory mapping with region access calls. Now, all region accesses
6379 through the installed region handler as they should.
6381 Simplified and optimized the NsGetNextNode function. Reduced parameter
6383 and reduced code for this frequently used function.
6385 Example Code and Data Size: These are the sizes for the OS-independent
6386 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6387 debug version of the code includes the debug output trace mechanism and
6389 much larger code and data size.
6392 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
6393 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
6395 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
6396 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
6398 2) iASL Compiler/Disassembler and Tools:
6400 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
6402 with sub-table disassembly and handling invalid sub-tables. Attempt
6404 after an invalid sub-table ID.
6406 ----------------------------------------
6407 22 April 2009. Summary of changes for version 20090422:
6409 1) ACPI CA Core Subsystem:
6411 Fixed a compatibility issue with the recently released I/O port
6413 mechanism. For windows compatibility, 1) On a port protection violation,
6414 simply ignore the request and do not return an exception (allow the
6416 method to continue execution.) 2) If only part of the request overlaps a
6417 protected port, read/write the individual ports that are not protected.
6421 Enhanced the execution of the ASL/AML BreakPoint operator so that it
6423 breaks into the AML debugger if the debugger is present. This matches the
6424 ACPI-defined behavior.
6426 Fixed several possible warnings related to the use of the configurable
6427 ACPI_THREAD_ID. This type can now be configured as either an integer or a
6428 pointer with no warnings. Also fixes several warnings in printf-like
6429 statements for the 64-bit build when the type is configured as a pointer.
6432 Fixed a number of possible warnings when compiling with gcc 4+ (depending
6434 warning options.) Examples include printf formats, aliasing, unused
6436 missing prototypes, missing switch default statements, use of non-ANSI
6437 library functions, use of non-ANSI constructs. See generate/unix/Makefile
6439 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
6441 Example Code and Data Size: These are the sizes for the OS-independent
6442 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6443 debug version of the code includes the debug output trace mechanism and
6445 much larger code and data size.
6448 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
6449 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
6451 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
6452 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
6454 2) iASL Compiler/Disassembler and Tools:
6456 iASL: Fixed a generation warning from Bison 2.3 and fixed several
6461 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
6463 correctly digest Windows/DOS formatted files (with CR/LF).
6465 iASL: Added a new option for "quiet mode" (-va) that produces only the
6466 compilation summary, not individual errors and warnings. Useful for large
6469 AcpiExec: Implemented a new option (-z) to enable a forced
6471 timeout that can be used to detect hang conditions during execution of
6473 code (includes both internal semaphores and AML-defined mutexes and
6476 Added new makefiles for the generation of acpica in a generic unix-like
6477 environment. These makefiles are intended to generate the acpica tools
6479 utilities from the original acpica git source tree structure.
6481 Test Suites: Updated and cleaned up the documentation files. Updated the
6482 copyrights to 2009, affecting all source files. Use the new version of
6484 with quiet mode. Increased the number of available semaphores in the
6486 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
6488 an alternate implementation of the semaphore timeout to allow aslts to
6489 execute fully on Cygwin.
6491 ----------------------------------------
6492 20 March 2009. Summary of changes for version 20090320:
6494 1) ACPI CA Core Subsystem:
6496 Fixed a possible race condition between AcpiWalkNamespace and dynamic
6498 unloads. Added a reader/writer locking mechanism to allow multiple
6500 namespace walks (readers), but block a dynamic table unload until it can
6502 exclusive write access to the namespace. This fixes a problem where a
6504 unload could (possibly catastrophically) delete the portion of the
6506 that is currently being examined by a walk. Adds a new file, utlock.c,
6508 implements the reader/writer lock mechanism. ACPICA BZ 749.
6510 Fixed a regression introduced in version 20090220 where a change to the
6512 handling could cause the ACPICA subsystem to access non-existent I/O
6515 Modified the handling of FADT register and table (FACS/DSDT) addresses.
6517 FADT can contain both 32-bit and 64-bit versions of these addresses.
6518 Previously, the 64-bit versions were favored, meaning that if both 32 and
6520 versions were valid, but not equal, the 64-bit version was used. This was
6521 found to cause some machines to fail. Now, in this case, the 32-bit
6523 is used instead. This now matches the Windows behavior.
6525 Implemented a new mechanism to protect certain I/O ports. Provides
6527 compatibility and protects the standard PC I/O ports from access via AML
6528 code. Adds a new file, hwvalid.c
6530 Fixed a possible extraneous warning message from the FADT support. The
6531 message warns of a 32/64 length mismatch between the legacy and GAS
6532 definitions for a register.
6534 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
6536 made obsolete by the port protection mechanism above. It was previously
6538 to validate the entire address range of an operation region, which could
6540 incorrect if the range included illegal ports, but fields within the
6541 operation region did not actually access those ports. Validation is now
6542 performed on a per-field basis instead of the entire region.
6544 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
6545 Ignored bits must be "preserved" according to the ACPI spec. Usually,
6547 means a read/modify/write when writing to the register. However, for
6549 registers, writing a one means clear the event. Writing a zero means
6551 the event (do not clear.) This behavior is clarified in the ACPI 4.0
6553 and the ACPICA code now simply always writes a zero to the ignored bit.
6555 Modified the handling of ignored bits for the PM1 A/B Control Registers.
6557 per the ACPI specification, for the control registers, preserve
6558 (read/modify/write) all bits that are defined as either reserved or
6561 Updated the handling of write-only bits in the PM1 A/B Control Registers.
6562 When reading the register, zero the write-only bits as per the ACPI spec.
6563 ACPICA BZ 443. Lin Ming.
6565 Removed "Linux" from the list of supported _OSI strings. Linux no longer
6566 wants to reply true to this request. The Windows strings are the only
6568 through the AML that are tested and known to work properly.
6571 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
6572 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
6574 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
6575 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
6577 2) iASL Compiler/Disassembler and Tools:
6579 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
6583 ----------------------------------------
6584 20 February 2009. Summary of changes for version 20090220:
6586 1) ACPI CA Core Subsystem:
6588 Optimized the ACPI register locking. Removed locking for reads from the
6590 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
6592 not required when reading the single-bit registers. The
6593 AcpiGetRegisterUnlocked function is no longer needed and has been
6595 This will improve performance for reads on these registers. ACPICA BZ
6598 Fixed the parameter validation for AcpiRead/Write. Now return
6599 AE_BAD_PARAMETER if the input register pointer is null, and
6602 the register has an address of zero. Previously, these cases simply
6604 AE_OK. For optional registers such as PM1B status/enable/control, the
6606 should check for a valid register address before calling. ACPICA BZ 748.
6608 Renamed the external ACPI bit register access functions. Renamed
6609 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
6610 functions. The new names are AcpiReadBitRegister and
6611 AcpiWriteBitRegister.
6612 Also, restructured the code for these functions by simplifying the code
6614 and condensing duplicate code to reduce code size.
6616 Added new functions to transparently handle the possibly split PM1 A/B
6617 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
6619 now handle the split registers for PM1 Status, Enable, and Control.
6624 Added a function to handle the PM1 control registers,
6625 AcpiHwWritePm1Control.
6626 This function writes both of the PM1 control registers (A/B). These
6628 are different than the PM1 A/B status and enable registers in that
6630 values can be written to the A/B registers. Most notably, the SLP_TYP
6632 can be different, as per the values returned from the _Sx predefined
6635 Removed an extra register write within AcpiHwClearAcpiStatus. This
6637 was writing an optional PM1B status register twice. The existing call to
6639 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
6641 register. ACPICA BZ 751.
6643 Split out the PM1 Status registers from the FADT. Added new globals for
6645 registers (A/B), similar to the way the PM1 Enable registers are handled.
6646 Instead of overloading the FADT Event Register blocks. This makes the
6648 clearer and less prone to error.
6650 Fixed the warning message for when the platform contains too many ACPI
6652 for the default size of the global root table data structure. The
6654 for the truncation value was incorrect.
6656 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
6657 obsolete macro, since it is now a simple reference to ->common.type.
6659 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
6661 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
6662 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
6663 simply SLEEP_TYPE. ACPICA BZ 754.
6665 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
6666 function is only needed on 64-bit host operating systems and is thus not
6667 included for 32-bit hosts.
6669 Debug output: print the input and result for invocations of the _OSI
6671 control method via the ACPI_LV_INFO debug level. Also, reduced some of
6673 verbosity of this debug level. Len Brown.
6675 Example Code and Data Size: These are the sizes for the OS-independent
6676 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6677 debug version of the code includes the debug output trace mechanism and
6679 much larger code and data size.
6682 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
6683 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
6685 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
6686 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
6688 2) iASL Compiler/Disassembler and Tools:
6690 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
6691 various legal performance profiles.
6693 ----------------------------------------
6694 23 January 2009. Summary of changes for version 20090123:
6696 1) ACPI CA Core Subsystem:
6698 Added the 2009 copyright to all module headers and signons. This affects
6699 virtually every file in the ACPICA core subsystem, the iASL compiler, and
6700 the tools/utilities.
6702 Implemented a change to allow the host to override any ACPI table,
6704 dynamically loaded tables. Previously, only the DSDT could be replaced by
6706 host. With this change, the AcpiOsTableOverride interface is called for
6708 table found in the RSDT/XSDT during ACPICA initialization, and also
6710 a table is dynamically loaded via the AML Load operator.
6712 Updated FADT flag definitions, especially the Boot Architecture flags.
6714 Debugger: For the Find command, automatically pad the input ACPI name
6716 underscores if the name is shorter than 4 characters. This enables a
6718 with the actual namespace entry which is itself padded with underscores.
6720 Example Code and Data Size: These are the sizes for the OS-independent
6721 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6722 debug version of the code includes the debug output trace mechanism and
6724 much larger code and data size.
6727 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
6728 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
6730 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
6731 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
6733 2) iASL Compiler/Disassembler and Tools:
6735 Fix build error under Bison-2.4.
6737 Dissasembler: Enhanced FADT support. Added decoding of the Boot
6739 flags. Now decode all flags, regardless of the FADT version. Flag output
6740 includes the FADT version which first defined each flag.
6742 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
6744 DSDT). Windows only.
6746 ----------------------------------------
6747 04 December 2008. Summary of changes for version 20081204:
6749 1) ACPI CA Core Subsystem:
6751 The ACPICA Programmer Reference has been completely updated and revamped
6753 this release. This includes updates to the external interfaces, OSL
6754 interfaces, the overview sections, and the debugger reference.
6756 Several new ACPICA interfaces have been implemented and documented in the
6757 programmer reference:
6758 AcpiReset - Writes the reset value to the FADT-defined reset register.
6759 AcpiDisableAllGpes - Disable all available GPEs.
6760 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
6761 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
6762 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
6763 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
6764 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
6766 Most of the public ACPI hardware-related interfaces have been moved to a
6768 file, components/hardware/hwxface.c
6770 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
6771 register lengths within the FADT are now used, and the low level ACPI
6772 register access no longer hardcodes the ACPI register lengths. Given that
6773 there may be some risk in actually trusting the FADT register lengths, a
6775 time option was added to fall back to the default hardcoded lengths if
6777 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
6778 option is set to true for now, and a warning is issued if a suspicious
6780 register length is overridden with the default value.
6782 Fixed a reference count issue in NsRepairObject. This problem was
6784 in version 20081031 as part of a fix to repair Buffer objects within
6787 Added semaphore support to the Linux/Unix application OS-services layer
6788 (OSL). ACPICA BZ 448. Lin Ming.
6790 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
6792 be implemented in the OSL, or will binary semaphores be used instead.
6794 Example Code and Data Size: These are the sizes for the OS-independent
6795 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6796 debug version of the code includes the debug output trace mechanism and
6798 much larger code and data size.
6801 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
6802 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
6804 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
6805 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
6807 2) iASL Compiler/Disassembler and Tools:
6809 iASL: Completed the '-e' option to include additional ACPI tables in
6812 aid with disassembly and External statement generation. ACPICA BZ 742.
6816 iASL: Removed the "named object in while loop" error. The compiler cannot
6817 determine how many times a loop will execute. ACPICA BZ 730.
6819 Disassembler: Implemented support for FADT revision 2 (MS extension).
6823 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
6826 ----------------------------------------
6827 31 October 2008. Summary of changes for version 20081031:
6829 1) ACPI CA Core Subsystem:
6831 Restructured the ACPICA header files into public/private. acpi.h now
6833 only the "public" acpica headers. All other acpica headers are "private"
6835 should not be included by acpica users. One new file, accommon.h is used
6837 include the commonly used private headers for acpica code generation.
6839 plans include moving all private headers to a new subdirectory.
6841 Implemented an automatic Buffer->String return value conversion for
6842 predefined ACPI methods. For these methods (such as _BIF), added
6844 conversion for return objects that are required to be a String, but a
6846 was found instead. This can happen when reading string battery data from
6848 operation region, because it used to be difficult to convert the data
6850 buffer to string from within the ASL. Ensures that the host OS is
6852 with a valid null-terminated string. Linux BZ 11822.
6854 Updated the FACS waking vector interfaces. Split
6855 AcpiSetFirmwareWakingVector
6856 into two: one for the 32-bit vector, another for the 64-bit vector. This
6858 required because the host OS must setup the wake much differently for
6860 vector (real vs. protected mode, etc.) and the interface itself should
6863 deciding which vector to use. Also, eliminated the
6864 GetFirmwareWakingVector
6865 interface, as it served no purpose (only the firmware reads the vector,
6867 only writes the vector.) ACPICA BZ 731.
6869 Implemented a mechanism to escape infinite AML While() loops. Added a
6871 counter to force exit from AML While loops if the count becomes too
6873 This can occur in poorly written AML when the hardware does not respond
6874 within a while loop and the loop does not implement a timeout. The
6876 loop count is configurable. A new exception code is returned when a loop
6878 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
6880 Optimized the execution of AML While loops. Previously, a control state
6881 object was allocated and freed for each execution of the loop. The
6882 optimization is to simply reuse the control state for each iteration.
6884 speeds up the raw loop execution time by about 5%.
6886 Enhanced the implicit return mechanism. For Windows compatibility, return
6888 implicit integer of value zero for methods that contain no executable
6890 Such methods are seen in the field as stubs (presumably), and can cause
6891 drivers to fail if they expect a return value. Lin Ming.
6893 Allow multiple backslashes as root prefixes in namepaths. In a fully
6894 qualified namepath, allow multiple backslash prefixes. This can happen
6896 is seen in the field) because of the use of a double-backslash in strings
6897 (since backslash is the escape character) causing confusion. ACPICA BZ
6901 Emit a warning if two different FACS or DSDT tables are discovered in the
6902 FADT. Checks if there are two valid but different addresses for the FACS
6904 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
6906 Consolidated the method argument count validation code. Merged the code
6908 validates control method argument counts into the predefined validation
6909 module. Eliminates possible multiple warnings for incorrect argument
6912 Implemented ACPICA example code. Includes code for ACPICA initialization,
6913 handler installation, and calling a control method. Available at
6914 source/tools/examples.
6916 Added a global pointer for FACS table to simplify internal FACS access.
6918 the global pointer instead of using AcpiGetTableByIndex for each FACS
6920 This simplifies the code for the Global Lock and the Firmware Waking
6923 Example Code and Data Size: These are the sizes for the OS-independent
6924 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6925 debug version of the code includes the debug output trace mechanism and
6927 much larger code and data size.
6930 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
6931 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
6933 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
6934 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
6936 2) iASL Compiler/Disassembler and Tools:
6938 iASL: Improved disassembly of external method calls. Added the -e option
6940 allow the inclusion of additional ACPI tables to help with the
6943 method invocations and the generation of external declarations during the
6944 disassembly. Certain external method invocations cannot be disassembled
6945 properly without the actual declaration of the method. Use the -e option
6947 include the table where the external method(s) are actually declared.
6949 useful for disassembling SSDTs that make method calls back to the master
6950 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
6952 -e dsdt.aml ssdt1.aml
6954 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
6955 problem where the use of an alias within a namepath would result in a not
6956 found error or cause the compiler to fault. Also now allows forward
6957 references from the Alias operator itself. ACPICA BZ 738.
6959 ----------------------------------------
6960 26 September 2008. Summary of changes for version 20080926:
6962 1) ACPI CA Core Subsystem:
6964 Designed and implemented a mechanism to validate predefined ACPI methods
6966 objects. This code validates the predefined ACPI objects (objects whose
6968 start with underscore) that appear in the namespace, at the time they are
6969 evaluated. The argument count and the type of the returned object are
6970 validated against the ACPI specification. The purpose of this validation
6972 to detect problems with the BIOS-implemented predefined ACPI objects
6974 the results are returned to the ACPI-related drivers. Future enhancements
6976 include actual repair of incorrect return objects where possible. Two new
6977 files are nspredef.c and acpredef.h.
6979 Fixed a fault in the AML parser if a memory allocation fails during the
6981 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
6983 Fixed an issue with implicit return compatibility. This change improves
6985 implicit return mechanism to be more compatible with the MS interpreter.
6987 Ming, ACPICA BZ 349.
6989 Implemented support for zero-length buffer-to-string conversions. Allow
6991 length strings during interpreter buffer-to-string conversions. For
6993 during the ToDecimalString and ToHexString operators, as well as implicit
6994 conversions. Fiodor Suietov, ACPICA BZ 585.
6996 Fixed two possible memory leaks in the error exit paths of
6997 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
6999 similar in that they use a stack of state objects in order to eliminate
7000 recursion. The stack must be fully unwound and deallocated if an error
7001 occurs. Lin Ming. ACPICA BZ 383.
7003 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
7005 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
7006 Moore ACPICA BZ 442.
7008 Removed the obsolete version number in module headers. Removed the
7009 "$Revision" number that appeared in each module header. This version
7011 was useful under SourceSafe and CVS, but has no meaning under git. It is
7013 only incorrect, it could also be misleading.
7015 Example Code and Data Size: These are the sizes for the OS-independent
7016 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7017 debug version of the code includes the debug output trace mechanism and
7019 much larger code and data size.
7022 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
7023 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
7025 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
7026 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
7028 ----------------------------------------
7029 29 August 2008. Summary of changes for version 20080829:
7031 1) ACPI CA Core Subsystem:
7033 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
7034 Reference. Changes include the elimination of cheating on the Object
7036 for the DdbHandle subtype, addition of a reference class field to
7037 differentiate the various reference types (instead of an AML opcode), and
7039 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
7041 Reduce an error to a warning for an incorrect method argument count.
7042 Previously aborted with an error if too few arguments were passed to a
7043 control method via the external ACPICA interface. Now issue a warning
7045 and continue. Handles the case where the method inadvertently declares
7047 many arguments, but does not actually use the extra ones. Applies mainly
7049 the predefined methods. Lin Ming. Linux BZ 11032.
7051 Disallow the evaluation of named object types with no intrinsic value.
7053 AE_TYPE for objects that have no value and therefore evaluation is
7055 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
7057 these types were allowed, but an exception would be generated at some
7059 during the evaluation. Now, the error is generated up front.
7061 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
7062 (nsnames.c). Fixes a leak in the error exit path.
7064 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
7066 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
7068 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
7071 Removed obsolete and/or unused exception codes from the acexcep.h header.
7072 There is the possibility that certain device drivers may be affected if
7074 use any of these exceptions.
7076 The ACPICA documentation has been added to the public git source tree,
7078 acpica/documents. Included are the ACPICA programmer reference, the iASL
7079 compiler reference, and the changes.txt release logfile.
7081 Example Code and Data Size: These are the sizes for the OS-independent
7082 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7083 debug version of the code includes the debug output trace mechanism and
7085 much larger code and data size.
7088 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
7089 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
7091 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
7092 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
7094 2) iASL Compiler/Disassembler and Tools:
7096 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
7097 defines _SCP with 3 arguments. Previous versions defined it with only 1
7098 argument. iASL now allows both definitions.
7100 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
7102 length subtables when disassembling ACPI tables. Also fixed a couple of
7103 errors where a full 16-bit table type field was not extracted from the
7107 acpisrc: Improve comment counting mechanism for generating source code
7108 statistics. Count first and last lines of multi-line comments as
7110 not comment lines. Handle Linux legal header in addition to standard
7114 ----------------------------------------
7116 29 July 2008. Summary of changes for version 20080729:
7118 1) ACPI CA Core Subsystem:
7120 Fix a possible deadlock in the GPE dispatch. Remove call to
7121 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
7123 to acquire the GPE lock but can deadlock since the GPE lock is already
7125 at dispatch time. This code was introduced in version 20060831 as a
7127 to Linux BZ 6881 and has since been removed from Linux.
7129 Add a function to dereference returned reference objects. Examines the
7131 object from a call to AcpiEvaluateObject. Any Index or RefOf references
7133 automatically dereferenced in an attempt to return something useful
7135 reference types cannot be converted into an external ACPI_OBJECT.)
7137 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
7139 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
7140 subtables for the MADT and one new subtable for the SRAT. Includes
7141 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
7143 Specification, June 2008.
7145 Additional error checking for pathname utilities. Add error check after
7147 calls to AcpiNsGetPathnameLength. Add status return from
7148 AcpiNsBuildExternalPath and check after all calls. Add parameter
7150 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
7152 Return status from the global init function AcpiUtGlobalInitialize. This
7154 used by both the kernel subsystem and the utilities such as iASL
7156 The function could possibly fail when the caches are initialized. Yang
7159 Add a function to decode reference object types to strings. Created for
7160 improved error messages.
7162 Improve object conversion error messages. Better error messages during
7164 conversion from internal to the external ACPI_OBJECT. Used for external
7166 to AcpiEvaluateObject.
7168 Example Code and Data Size: These are the sizes for the OS-independent
7169 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7170 debug version of the code includes the debug output trace mechanism and
7172 much larger code and data size.
7175 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
7176 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
7178 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
7179 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
7181 2) iASL Compiler/Disassembler and Tools:
7183 Debugger: fix a possible hang when evaluating non-methods. Fixes a
7185 introduced in version 20080701. If the object being evaluated (via
7187 command) is not a method, the debugger can hang while trying to obtain
7189 existent parameters.
7191 iASL: relax error for using reserved "_T_x" identifiers. These names can
7192 appear in a disassembled ASL file if they were emitted by the original
7193 compiler. Instead of issuing an error or warning and forcing the user to
7194 manually change these names, issue a remark instead.
7196 iASL: error if named object created in while loop. Emit an error if any
7198 object is created within a While loop. If allowed, this code will
7201 run-time error on the second iteration of the loop when an attempt is
7204 create the same named object twice. ACPICA bugzilla 730.
7206 iASL: Support absolute pathnames for include files. Add support for
7208 pathnames within the Include operator. previously, only relative
7212 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
7214 The ACPI spec requires one interrupt minimum. BZ 423
7216 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
7217 Handles the case for the Interrupt Resource Descriptor where
7218 the ResourceSource argument is omitted but ResourceSourceIndex
7219 is present. Now leave room for the Index. BZ 426
7221 iASL: Prevent error message if CondRefOf target does not exist. Fixes
7223 where an error message is emitted if the target does not exist. BZ 516
7225 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
7226 (get ACPI tables on Windows). This was apparently broken in version
7229 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
7231 the EOF happens immediately after the last table in the input file. Print
7232 completion message. Previously, no message was displayed in this case.
7234 ----------------------------------------
7235 01 July 2008. Summary of changes for version 20080701:
7237 0) Git source tree / acpica.org
7239 Fixed a problem where a git-clone from http would not transfer the entire
7242 1) ACPI CA Core Subsystem:
7244 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
7245 enable bit. Now performs a read-change-write of the enable register
7247 of simply writing out the cached enable mask. This will prevent
7249 enabling of GPEs if a rogue GPE is received during initialization (before
7251 handlers are installed.)
7253 Implemented a copy for dynamically loaded tables. Previously, dynamically
7254 loaded tables were simply mapped - but on some machines this memory is
7255 corrupted after suspend. Now copy the table to a local buffer. For the
7256 OpRegion case, added checksum verify. Use the table length from the table
7257 header, not the region length. For the Buffer case, use the table length
7258 also. Dennis Noordsij, Bob Moore. BZ 10734
7260 Fixed a problem where the same ACPI table could not be dynamically loaded
7262 unloaded more than once. Without this change, a table cannot be loaded
7264 once it has been loaded/unloaded one time. The current mechanism does not
7265 unregister a table upon an unload. During a load, if the same table is
7267 this no longer returns an exception. BZ 722
7269 Fixed a problem where the wrong descriptor length was calculated for the
7270 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
7272 are calculated as 12 bytes long, but the actual length in the internal
7273 descriptor is 16 because of the round-up to 8 on the 64-bit build.
7275 by Linn Crosetto. BZ 728
7277 Fixed a possible memory leak in the Unload operator. The DdbHandle
7279 by Load() did not have its reference count decremented during unload,
7281 to a memory leak. Lin Ming. BZ 727
7283 Fixed a possible memory leak when deleting thermal/processor objects. Any
7284 associated notify handlers (and objects) were not being deleted. Fiodor
7287 Fixed the ordering of the ASCII names in the global mutex table to match
7289 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
7291 Vegard Nossum. BZ 726
7293 Enhanced the AcpiGetObjectInfo interface to return the number of required
7294 arguments if the object is a control method. Added this call to the
7296 so the proper number of default arguments are passed to a method. This
7297 prevents a warning when executing methods from AcpiExec.
7299 Added a check for an invalid handle in AcpiGetObjectInfo. Return
7300 AE_BAD_PARAMETER if input handle is invalid. BZ 474
7302 Fixed an extraneous warning from exconfig.c on the 64-bit build.
7304 Example Code and Data Size: These are the sizes for the OS-independent
7305 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7306 debug version of the code includes the debug output trace mechanism and
7308 much larger code and data size.
7311 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
7312 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
7314 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
7315 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
7317 2) iASL Compiler/Disassembler and Tools:
7319 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
7320 resource descriptor names.
7322 iASL: Detect invalid ASCII characters in input (windows version). Removed
7324 "-CF" flag from the flex compile, enables correct detection of non-ASCII
7325 characters in the input. BZ 441
7327 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
7329 "result of operation not used" warning when the DDB handle returned from
7330 LoadTable is not used. The warning is not needed. BZ 590
7332 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
7335 pass address of table to the AML. Added option to disable OpRegion
7337 to allow creation of an OpRegion with a real address that was passed to
7339 All of this allows testing of the Load and Unload operators from
7342 Debugger: update tables command for unloaded tables. Handle unloaded
7344 and use the standard table header output routine.
7346 ----------------------------------------
7347 09 June 2008. Summary of changes for version 20080609:
7349 1) ACPI CA Core Subsystem:
7351 Implemented a workaround for reversed _PRT entries. A significant number
7353 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
7354 change dynamically detects and repairs this problem. Provides
7356 with MS ACPI. BZ 6859
7358 Simplified the internal ACPI hardware interfaces to eliminate the locking
7359 flag parameter from Register Read/Write. Added a new external interface,
7360 AcpiGetRegisterUnlocked.
7362 Fixed a problem where the invocation of a GPE control method could hang.
7364 was a regression introduced in 20080514. The new method argument count
7365 validation mechanism can enter an infinite loop when a GPE method is
7366 dispatched. Problem fixed by removing the obsolete code that passed GPE
7368 information to the notify handler via the control method parameter
7371 Fixed a problem where the _SST execution status was incorrectly returned
7373 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
7375 20080514. _SST is optional and a NOT_FOUND exception should never be
7378 Fixed a problem where a deleted object could be accessed from within the
7380 parser. This was a regression introduced in version 20080123 as a fix for
7382 Unload operator. Lin Ming. BZ 10669
7384 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
7386 and eliminated the use of a negative index in a loop. Operands are now
7387 displayed in the correct order, not backwards. This also fixes a
7389 introduced in 20080514 on 64-bit systems where the elimination of
7390 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
7393 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
7395 path did not delete a locally allocated structure.
7397 Updated definitions for the DMAR and SRAT tables to synchronize with the
7398 current specifications. Includes disassembler support.
7400 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
7401 loop termination value was used. Loop terminated on iteration early,
7403 one mutex. Linn Crosetto
7405 Example Code and Data Size: These are the sizes for the OS-independent
7406 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7407 debug version of the code includes the debug output trace mechanism and
7409 much larger code and data size.
7412 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
7413 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
7415 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
7416 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
7418 2) iASL Compiler/Disassembler and Tools:
7420 Disassembler: Implemented support for EisaId() within _CID objects. Now
7421 disassemble integer _CID objects back to EisaId invocations, including
7422 multiple integers within _CID packages. Includes single-step support for
7425 Disassembler: Added support for DMAR and SRAT table definition changes.
7427 ----------------------------------------
7428 14 May 2008. Summary of changes for version 20080514:
7430 1) ACPI CA Core Subsystem:
7432 Fixed a problem where GPEs were enabled too early during the ACPICA
7433 initialization. This could lead to "handler not installed" errors on some
7434 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
7436 ensures that all operation regions and devices throughout the namespace
7438 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
7440 Implemented a change to the enter sleep code. Moved execution of the _GTS
7441 method to just before setting sleep enable bit. The execution was moved
7443 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
7444 immediately before the SLP_EN bit is set, as per the ACPI specification.
7447 Implemented a fix to disable unknown GPEs (2nd version). Now always
7449 the GPE, even if ACPICA thinks that that it is already disabled. It is
7450 possible that the AML or some other code has enabled the GPE unbeknownst
7454 Fixed a problem with the Field operator where zero-length fields would
7456 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
7458 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
7460 Implemented a fix for the Load operator, now load the table at the
7462 root. This reverts a change introduced in version 20071019. The table is
7464 loaded at the namespace root even though this goes against the ACPI
7465 specification. This provides compatibility with other ACPI
7467 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
7470 Fixed a problem where ACPICA would not Load() tables with unusual
7472 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
7473 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
7474 Therefore, signature validation is worthless. Apparently MS ACPI accepts
7476 signatures, ACPICA must be compatible. BZ 10454.
7478 Fixed a possible negative array index in AcpiUtValidateException. Added
7480 fields to the exception string arrays to eliminate a -1 subtraction on
7484 Updated the debug tracking macros to reduce overall code and data size.
7485 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
7486 instead of pointers to static strings. Jan Beulich and Bob Moore.
7488 Implemented argument count checking in control method invocation via
7489 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
7491 many. This applies only to extern programmatic control method execution,
7493 method-to-method calls within the AML. Lin Ming.
7495 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
7497 longer needed, especially with the removal of 16-bit support. It was
7499 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
7502 32/64-bit platforms is required.
7504 Added the C const qualifier for appropriate string constants -- mostly
7505 MODULE_NAME and printf format strings. Jan Beulich.
7507 Example Code and Data Size: These are the sizes for the OS-independent
7508 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7509 debug version of the code includes the debug output trace mechanism and
7511 much larger code and data size.
7514 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
7515 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
7517 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
7518 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
7520 2) iASL Compiler/Disassembler and Tools:
7522 Implemented ACPI table revision ID validation in the disassembler. Zero
7524 always invalid. For DSDTs, the ID controls the interpreter integer width.
7526 means 32-bit and this is unusual. 2 or greater is 64-bit.
7528 ----------------------------------------
7529 21 March 2008. Summary of changes for version 20080321:
7531 1) ACPI CA Core Subsystem:
7533 Implemented an additional change to the GPE support in order to suppress
7534 spurious or stray GPEs. The AcpiEvDisableGpe function will now
7536 disable incoming GPEs that are neither enabled nor disabled -- meaning
7538 the GPE is unknown to the system. This should prevent future interrupt
7540 from that GPE. BZ 6217 (Zhang Rui)
7542 Fixed a problem where NULL package elements were not returned to the
7543 AcpiEvaluateObject interface correctly. The element was simply ignored
7544 instead of returning a NULL ACPI_OBJECT package element, potentially
7546 a buffer overflow and/or confusing the caller who expected a fixed number
7548 elements. BZ 10132 (Lin Ming, Bob Moore)
7550 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
7552 Qword), Field, BankField, and IndexField operators when invoked from
7554 an executing control method. In this case, these operators created
7556 nodes that were incorrectly left marked as permanent nodes instead of
7557 temporary nodes. This could cause a problem if there is race condition
7558 between an exiting control method and a running namespace walk. (Reported
7562 Fixed a problem where the CreateField and CreateXXXField operators would
7563 incorrectly allow duplicate names (the name of the field) with no
7567 Implemented several changes for Notify handling. Added support for new
7569 values (ACPI 2.0+) and improved the Notify debug output. Notify on
7570 PowerResource objects is no longer allowed, as per the ACPI
7572 (Bob Moore, Zhang Rui)
7574 All Reference Objects returned via the AcpiEvaluateObject interface are
7576 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
7578 NULL objects - either NULL package elements or unresolved named
7581 Fixed a problem where an extraneous debug message was produced for
7583 objects (when debugging enabled). The message "Package List length larger
7584 than NumElements count" is now produced in the correct case, and is now
7586 error message rather than a debug message. Added a debug message for the
7587 opposite case, where NumElements is larger than the Package List (the
7589 will be padded out with NULL elements as per the ACPI spec.)
7591 Implemented several improvements for the output of the ASL "Debug" object
7593 clarify and keep all data for a given object on one output line.
7595 Fixed two size calculation issues with the variable-length Start
7597 resource descriptor.
7599 Example Code and Data Size: These are the sizes for the OS-independent
7600 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7601 debug version of the code includes the debug output trace mechanism and
7603 a much larger code and data size.
7606 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
7607 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
7609 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
7610 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
7612 2) iASL Compiler/Disassembler and Tools:
7614 Fixed a problem with the use of the Switch operator where execution of
7616 containing method by multiple concurrent threads could cause an
7617 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
7618 actual Switch opcode, it must be simulated with local named temporary
7619 variables and if/else pairs. The solution chosen was to mark any method
7621 uses Switch as Serialized, thus preventing multiple thread entries. BZ
7624 ----------------------------------------
7625 13 February 2008. Summary of changes for version 20080213:
7627 1) ACPI CA Core Subsystem:
7629 Implemented another MS compatibility design change for GPE/Notify
7631 GPEs are now cleared/enabled asynchronously to allow all pending notifies
7633 complete first. It is expected that the OSL will queue the enable request
7634 behind all pending notify requests (may require changes to the local host
7636 in AcpiOsExecute). Alexey Starikovskiy.
7638 Fixed a problem where buffer and package objects passed as arguments to a
7639 control method via the external AcpiEvaluateObject interface could cause
7641 AE_AML_INTERNAL exception depending on the order and type of operators
7642 executed by the target control method.
7644 Fixed a problem where resource descriptor size optimization could cause a
7645 problem when a _CRS resource template is passed to a _SRS method. The
7647 resource template must use the same descriptors (with the same size) as
7648 returned from _CRS. This change affects the following resource
7650 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
7653 Fixed a problem where a CopyObject to RegionField, BankField, and
7655 objects did not perform an implicit conversion as it should. These types
7657 retain their initial type permanently as per the ACPI specification.
7659 a CopyObject to all other object types should not perform an implicit
7660 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
7662 Fixed a problem with the AcpiGetDevices interface where the mechanism to
7663 match device CIDs did not examine the entire list of available CIDs, but
7664 instead aborted on the first non-matching CID. Andrew Patterson.
7666 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
7668 inadvertently changed to return a 16-bit value instead of a 32-bit value,
7669 truncating the upper dword of a 64-bit value. This macro is only used to
7670 display debug output, so no incorrect calculations were made. Also,
7671 reimplemented the macro so that a 64-bit shift is not performed by
7672 inefficient compilers.
7674 Added missing va_end statements that should correspond with each va_start
7677 Example Code and Data Size: These are the sizes for the OS-independent
7678 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7679 debug version of the code includes the debug output trace mechanism and
7681 a much larger code and data size.
7684 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
7685 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
7687 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
7688 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
7690 2) iASL Compiler/Disassembler and Tools:
7692 Implemented full disassembler support for the following new ACPI tables:
7693 BERT, EINJ, and ERST. Implemented partial disassembler support for the
7694 complicated HEST table. These tables support the Windows Hardware Error
7695 Architecture (WHEA).
7697 ----------------------------------------
7698 23 January 2008. Summary of changes for version 20080123:
7700 1) ACPI CA Core Subsystem:
7702 Added the 2008 copyright to all module headers and signons. This affects
7703 virtually every file in the ACPICA core subsystem, the iASL compiler, and
7704 the tools/utilities.
7706 Fixed a problem with the SizeOf operator when used with Package and
7708 objects. These objects have deferred execution for some arguments, and
7710 execution is now completed before the SizeOf is executed. This problem
7712 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
7716 Implemented an enhancement to the interpreter "slack mode". In the
7719 an explicit return or an implicitly returned object from the last
7721 opcode, a control method will now implicitly return an integer of value 0
7723 Microsoft compatibility. (Lin Ming) BZ 392
7725 Fixed a problem with the Load operator where an exception was not
7728 the case where the table is already loaded. (Lin Ming) BZ 463
7730 Implemented support for the use of DDBHandles as an Indexed Reference, as
7732 the ACPI spec. (Lin Ming) BZ 486
7734 Implemented support for UserTerm (Method invocation) for the Unload
7736 as per the ACPI spec. (Lin Ming) BZ 580
7738 Fixed a problem with the LoadTable operator where the OemId and
7740 input strings could cause unexpected failures if they were shorter than
7742 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
7744 Implemented support for UserTerm (Method invocation) for the Unload
7746 as per the ACPI spec. (Lin Ming) BZ 580
7748 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
7750 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
7752 Example Code and Data Size: These are the sizes for the OS-independent
7753 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7754 debug version of the code includes the debug output trace mechanism and
7756 a much larger code and data size.
7759 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
7760 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
7762 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
7763 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
7765 2) iASL Compiler/Disassembler and Tools:
7767 Implemented support in the disassembler for checksum validation on
7769 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
7771 header dump at the start of the disassembly.
7773 Implemented additional debugging information in the namespace listing
7775 created during compilation. In addition to the namespace hierarchy, the
7777 pathname to each namespace object is displayed.
7779 Fixed a problem with the disassembler where invalid ACPI tables could
7781 faults or infinite loops.
7783 Fixed an unexpected parse error when using the optional "parameter types"
7784 list in a control method declaration. (Lin Ming) BZ 397
7786 Fixed a problem where two External declarations with the same name did
7788 cause an error (Lin Ming) BZ 509
7790 Implemented support for full TermArgs (adding Argx, Localx and method
7791 invocation) for the ParameterData parameter to the LoadTable operator.
7795 ----------------------------------------
7796 19 December 2007. Summary of changes for version 20071219:
7798 1) ACPI CA Core Subsystem:
7800 Implemented full support for deferred execution for the TermArg string
7801 arguments for DataTableRegion. This enables forward references and full
7802 operand resolution for the three string arguments. Similar to
7804 deferred argument execution.) Lin Ming. BZ 430
7806 Implemented full argument resolution support for the BankValue argument
7808 BankField. Previously, only constants were supported, now any TermArg may
7810 used. Lin Ming BZ 387, 393
7812 Fixed a problem with AcpiGetDevices where the search of a branch of the
7813 device tree could be terminated prematurely. In accordance with the ACPI
7814 specification, the search down the current branch is terminated if a
7816 is both not present and not functional (instead of just not present.)
7820 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
7822 the underlying AML code changed the GPE enable registers. Now, any
7824 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
7826 instead of simply ignored. Rui Zhang.
7828 Fixed a problem with Index Fields where the Index register was
7830 limited to a maximum of 32 bits. Now any size may be used.
7832 Fixed a couple memory leaks associated with "implicit return" objects
7834 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
7836 Example Code and Data Size: These are the sizes for the OS-independent
7837 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7838 debug version of the code includes the debug output trace mechanism and
7840 a much larger code and data size.
7843 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
7844 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
7846 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
7847 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
7849 ----------------------------------------
7850 14 November 2007. Summary of changes for version 20071114:
7852 1) ACPI CA Core Subsystem:
7854 Implemented event counters for each of the Fixed Events, the ACPI SCI
7855 (interrupt) itself, and control methods executed. Named
7856 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
7858 should be useful for debugging and statistics.
7860 Implemented a new external interface, AcpiGetStatistics, to retrieve the
7861 contents of the various event counters. Returns the current values for
7862 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
7863 AcpiMethodCount. The interface can be expanded in the future if new
7865 are added. Device drivers should use this interface rather than access
7869 Fixed a problem with the FromBCD and ToBCD operators. With some
7871 the ShortDivide function worked incorrectly, causing problems with the
7873 functions with large input values. A truncation from 64-bit to 32-bit
7874 inadvertently occurred. Internal BZ 435. Lin Ming
7876 Fixed a problem with Index references passed as method arguments.
7878 passed as arguments to control methods were dereferenced immediately
7880 control was passed to the called method). The references are now
7882 passed directly to the called method. BZ 5389. Lin Ming
7884 Fixed a problem with CopyObject used in conjunction with the Index
7886 The reference was incorrectly dereferenced before the copy. The reference
7888 now correctly copied. BZ 5391. Lin Ming
7890 Fixed a problem with Control Method references within Package objects.
7892 references are now correctly generated. This completes the package
7893 construction overhaul that began in version 20071019.
7895 Example Code and Data Size: These are the sizes for the OS-independent
7896 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7897 debug version of the code includes the debug output trace mechanism and
7899 a much larger code and data size.
7902 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
7903 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
7905 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
7906 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
7909 2) iASL Compiler/Disassembler and Tools:
7911 The AcpiExec utility now installs handlers for all of the predefined
7912 Operation Region types. New types supported are: PCI_Config, CMOS, and
7915 Fixed a problem with the 64-bit version of AcpiExec where the extended
7917 bit) address fields for the DSDT and FACS within the FADT were not being
7918 used, causing truncation of the upper 32-bits of these addresses. Lin
7922 ----------------------------------------
7923 19 October 2007. Summary of changes for version 20071019:
7925 1) ACPI CA Core Subsystem:
7927 Fixed a problem with the Alias operator when the target of the alias is a
7928 named ASL operator that opens a new scope -- Scope, Device,
7930 Processor, and ThermalZone. In these cases, any children of the original
7931 operator could not be accessed via the alias, potentially causing
7933 AE_NOT_FOUND exceptions. (BZ 9067)
7935 Fixed a problem with the Package operator where all named references were
7936 created as object references and left otherwise unresolved. According to
7938 ACPI specification, a Package can only contain Data Objects or references
7940 control methods. The implication is that named references to Data Objects
7941 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
7942 immediately upon package creation. This is the approach taken with this
7943 change. References to all other named objects (Methods, Devices, Scopes,
7944 etc.) are all now properly created as reference objects. (BZ 5328)
7946 Reverted a change to Notify handling that was introduced in version
7947 20070508. This version changed the Notify handling from asynchronous to
7948 fully synchronous (Device driver Notify handling with respect to the
7950 ASL operator). It was found that this change caused more problems than it
7951 solved and was removed by most users.
7953 Fixed a problem with the Increment and Decrement operators where the type
7955 the target object could be unexpectedly and incorrectly changed. (BZ 353)
7958 Fixed a problem with the Load and LoadTable operators where the table
7959 location within the namespace was ignored. Instead, the table was always
7960 loaded into the root or current scope. Lin Ming.
7962 Fixed a problem with the Load operator when loading a table from a buffer
7963 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
7965 Fixed a problem with the Debug object where a store of a DdbHandle
7967 object to the Debug object could cause a fault.
7969 Added a table checksum verification for the Load operator, in the case
7971 the load is from a buffer. (BZ 578).
7973 Implemented additional parameter validation for the LoadTable operator.
7975 length of the input strings SignatureString, OemIdString, and OemTableId
7977 now checked for maximum lengths. (BZ 582) Lin Ming.
7979 Example Code and Data Size: These are the sizes for the OS-independent
7980 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7981 debug version of the code includes the debug output trace mechanism and
7983 a much larger code and data size.
7986 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
7987 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
7989 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
7990 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
7993 2) iASL Compiler/Disassembler:
7995 Fixed a problem where if a single file was specified and the file did not
7996 exist, no error message was emitted. (Introduced with wildcard support in
7999 ----------------------------------------
8000 19 September 2007. Summary of changes for version 20070919:
8002 1) ACPI CA Core Subsystem:
8004 Designed and implemented new external interfaces to install and remove
8005 handlers for ACPI table-related events. Current events that are defined
8007 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
8008 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
8009 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
8011 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
8012 (acpi_serialized option on Linux) could cause some systems to hang during
8013 initialization. (Bob Moore) BZ 8171
8015 Fixed a problem where objects of certain types (Device, ThermalZone,
8016 Processor, PowerResource) can be not found if they are declared and
8017 referenced from within the same control method (Lin Ming) BZ 341
8019 Example Code and Data Size: These are the sizes for the OS-independent
8020 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8021 debug version of the code includes the debug output trace mechanism and
8023 a much larger code and data size.
8026 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
8027 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
8029 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
8030 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
8033 2) iASL Compiler/Disassembler:
8035 Implemented support to allow multiple files to be compiled/disassembled
8038 single invocation. This includes command line wildcard support for both
8040 Windows and Unix versions of the compiler. This feature simplifies the
8041 disassembly and compilation of multiple ACPI tables in a single
8044 ----------------------------------------
8045 08 May 2007. Summary of changes for version 20070508:
8047 1) ACPI CA Core Subsystem:
8049 Implemented a Microsoft compatibility design change for the handling of
8051 Notify AML operator. Previously, notify handlers were dispatched and
8052 executed completely asynchronously in a deferred thread. The new design
8053 still executes the notify handlers in a different thread, but the
8055 thread that executed the Notify() now waits at a synchronization point
8057 the notify handler to complete. Some machines depend on a synchronous
8059 operator in order to operate correctly.
8061 Implemented support to allow Package objects to be passed as method
8062 arguments to the external AcpiEvaluateObject interface. Previously, this
8063 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
8064 implemented since there were no reserved control methods that required it
8067 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
8069 contained invalid non-zero values in reserved fields could cause later
8070 failures because these fields have meaning in later revisions of the
8072 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
8074 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
8076 Fixed a problem where the Global Lock handle was not properly updated if
8078 thread that acquired the Global Lock via executing AML code then
8080 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
8084 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
8085 could be corrupted if the interrupt being removed was at the head of the
8086 list. Reported by Linn Crosetto.
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 a much larger code and data size.
8095 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
8096 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
8098 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
8099 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
8101 ----------------------------------------
8102 20 March 2007. Summary of changes for version 20070320:
8104 1) ACPI CA Core Subsystem:
8106 Implemented a change to the order of interpretation and evaluation of AML
8107 operand objects within the AML interpreter. The interpreter now evaluates
8108 operands in the order that they appear in the AML stream (and the
8109 corresponding ASL code), instead of in the reverse order (after the
8111 operand list has been parsed). The previous behavior caused several
8113 incompatibilities with the Microsoft AML interpreter as well as being
8114 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
8116 Implemented a change to the ACPI Global Lock support. All interfaces to
8118 global lock now allow the same thread to acquire the lock multiple times.
8119 This affects the AcpiAcquireGlobalLock external interface to the global
8121 as well as the internal use of the global lock to support AML fields -- a
8122 control method that is holding the global lock can now simultaneously
8124 AML fields that require global lock protection. Previously, in both
8126 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
8128 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
8129 Controller. There is no change to the behavior of the AML Acquire
8131 as this can already be used to acquire a mutex multiple times by the same
8132 thread. BZ 8066. With assistance from Alexey Starikovskiy.
8134 Fixed a problem where invalid objects could be referenced in the AML
8135 Interpreter after error conditions. During operand evaluation, ensure
8137 the internal "Return Object" field is cleared on error and only valid
8138 pointers are stored there. Caused occasional access to deleted objects
8140 resulted in "large reference count" warning messages. Valery Podrezov.
8142 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
8144 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
8147 Fixed an internal problem with the handling of result objects on the
8148 interpreter result stack. BZ 7872. Valery Podrezov.
8150 Removed obsolete code that handled the case where AML_NAME_OP is the
8152 of a reference (Reference.Opcode). This code was no longer necessary. BZ
8153 7874. Valery Podrezov.
8155 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
8158 remnant from the previously discontinued 16-bit support.
8160 Example Code and Data Size: These are the sizes for the OS-independent
8161 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8162 debug version of the code includes the debug output trace mechanism and
8164 a much larger code and data size.
8167 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
8168 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
8170 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
8171 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
8173 ----------------------------------------
8174 26 January 2007. Summary of changes for version 20070126:
8176 1) ACPI CA Core Subsystem:
8178 Added the 2007 copyright to all module headers and signons. This affects
8179 virtually every file in the ACPICA core subsystem, the iASL compiler, and
8182 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
8183 during a table load. A bad pointer was passed in the case where the DSDT
8185 overridden, causing a fault in this case.
8187 Example Code and Data Size: These are the sizes for the OS-independent
8188 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8189 debug version of the code includes the debug output trace mechanism and
8191 a much larger code and data size.
8194 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
8195 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
8197 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
8198 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
8200 ----------------------------------------
8201 15 December 2006. Summary of changes for version 20061215:
8203 1) ACPI CA Core Subsystem:
8205 Support for 16-bit ACPICA has been completely removed since it is no
8207 necessary and it clutters the code. All 16-bit macros, types, and
8208 conditional compiles have been removed, cleaning up and simplifying the
8210 across the entire subsystem. DOS support is no longer needed since the
8211 bootable Linux firmware kit is now available.
8213 The handler for the Global Lock is now removed during AcpiTerminate to
8214 enable a clean subsystem restart, via the implementation of the
8215 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
8218 Implemented enhancements to the multithreading support within the
8220 to enable improved multithreading debugging and evaluation of the
8224 Debugger: Enhanced the Statistics/Memory command to emit the total
8226 memory used during the execution, as well as the maximum memory consumed
8228 each of the various object types. (Valery Podrezov)
8230 Example Code and Data Size: These are the sizes for the OS-independent
8231 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8232 debug version of the code includes the debug output trace mechanism and
8234 a much larger code and data size.
8237 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
8238 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
8240 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
8241 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
8244 2) iASL Compiler/Disassembler and Tools:
8246 AcpiExec: Implemented a new option (-m) to display full memory use
8247 statistics upon subsystem/program termination. (Valery Podrezov)
8249 ----------------------------------------
8250 09 November 2006. Summary of changes for version 20061109:
8252 1) ACPI CA Core Subsystem:
8254 Optimized the Load ASL operator in the case where the source operand is
8256 operation region. Simply map the operation region memory, instead of
8257 performing a bytewise read. (Region must be of type SystemMemory, see
8260 Fixed the Load ASL operator for the case where the source operand is a
8261 region field. A buffer object is also allowed as the source operand. BZ
8264 Fixed a problem where the Load ASL operator allowed the source operand to
8266 an operation region of any type. It is now restricted to regions of type
8267 SystemMemory, as per the ACPI specification. BZ 481
8269 Additional cleanup and optimizations for the new Table Manager code.
8271 AcpiEnable will now fail if all of the required ACPI tables are not
8273 (FADT, FACS, DSDT). BZ 477
8275 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
8277 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
8278 manually optimized to be aligned and will not work if it is byte-packed.
8280 Example Code and Data Size: These are the sizes for the OS-independent
8281 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8282 debug version of the code includes the debug output trace mechanism and
8284 a much larger code and data size.
8287 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
8288 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
8290 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
8291 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
8294 2) iASL Compiler/Disassembler and Tools:
8296 Fixed a problem where the presence of the _OSI predefined control method
8297 within complex expressions could cause an internal compiler error.
8299 AcpiExec: Implemented full region support for multiple address spaces.
8300 SpaceId is now part of the REGION object. BZ 429
8302 ----------------------------------------
8303 11 October 2006. Summary of changes for version 20061011:
8305 1) ACPI CA Core Subsystem:
8307 Completed an AML interpreter performance enhancement for control method
8308 execution. Previously a 2-pass parse/execution, control methods are now
8309 completely parsed and executed in a single pass. This improves overall
8310 interpreter performance by ~25%, reduces code size, and reduces CPU stack
8311 use. (Valery Podrezov + interpreter changes in version 20051202 that
8312 eliminated namespace loading during the pass one parse.)
8314 Implemented _CID support for PCI Root Bridge detection. If the _HID does
8316 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
8318 obtained and also checked for an ID match.
8320 Implemented additional support for the PCI _ADR execution: upsearch until
8322 device scope is found before executing _ADR. This allows PCI_Config
8323 operation regions to be declared locally within control methods
8327 Fixed a problem with a possible race condition between threads executing
8328 AcpiWalkNamespace and the AML interpreter. This condition was removed by
8329 modifying AcpiWalkNamespace to (by default) ignore all temporary
8331 entries created during any concurrent control method execution. An
8332 additional namespace race condition is known to exist between
8333 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
8336 Restructured the AML ParseLoop function, breaking it into several
8337 subfunctions in order to reduce CPU stack use and improve
8341 AcpiGetHandle: Fix for parameter validation to detect invalid
8343 of prefix handle and pathname. BZ 478
8345 Example Code and Data Size: These are the sizes for the OS-independent
8346 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8347 debug version of the code includes the debug output trace mechanism and
8349 a much larger code and data size.
8352 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
8353 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
8355 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
8356 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
8358 2) iASL Compiler/Disassembler and Tools:
8360 Ported the -g option (get local ACPI tables) to the new ACPICA Table
8362 to restore original behavior.
8364 ----------------------------------------
8365 27 September 2006. Summary of changes for version 20060927:
8367 1) ACPI CA Core Subsystem:
8369 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
8370 These functions now use a spinlock for mutual exclusion and the interrupt
8371 level indication flag is not needed.
8373 Fixed a problem with the Global Lock where the lock could appear to be
8374 obtained before it is actually obtained. The global lock semaphore was
8375 inadvertently created with one unit instead of zero units. (BZ 464)
8379 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
8381 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
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 a much larger code and data size.
8390 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
8391 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
8393 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
8394 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
8397 2) iASL Compiler/Disassembler and Tools:
8399 Fixed a compilation problem with the pre-defined Resource Descriptor
8401 names where an "object does not exist" error could be incorrectly
8403 if the parent ResourceTemplate pathname places the template within a
8404 different namespace scope than the current scope. (BZ 7212)
8406 Fixed a problem where the compiler could hang after syntax errors
8408 in an ElseIf construct. (BZ 453)
8410 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
8411 operator. An incorrect output filename was produced when this parameter
8413 a null string (""). Now, the original input filename is used as the AML
8414 output filename, with an ".aml" extension.
8416 Implemented a generic batch command mode for the AcpiExec utility
8418 any AML debugger command) (Valery Podrezov).
8420 ----------------------------------------
8421 12 September 2006. Summary of changes for version 20060912:
8423 1) ACPI CA Core Subsystem:
8425 Enhanced the implementation of the "serialized mode" of the interpreter
8426 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
8427 specified, instead of creating a serialization semaphore per control
8429 the interpreter lock is simply no longer released before a blocking
8430 operation during control method execution. This effectively makes the AML
8431 Interpreter single-threaded. The overhead of a semaphore per-method is
8434 Fixed a regression where an error was no longer emitted if a control
8436 attempts to create 2 objects of the same name. This once again returns
8437 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
8439 will dynamically serialize the control method to possible prevent future
8442 Integrated a fix for a problem with PCI Express HID detection in the PCI
8443 Config Space setup procedure. (BZ 7145)
8445 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
8446 AcpiHwInitialize function - the FADT registers are now validated when the
8449 Added two new warnings during FADT verification - 1) if the FADT is
8451 than the largest known FADT version, and 2) if there is a mismatch
8454 32-bit block address and the 64-bit X counterpart (when both are non-
8457 Example Code and Data Size: These are the sizes for the OS-independent
8458 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8459 debug version of the code includes the debug output trace mechanism and
8461 a much larger code and data size.
8464 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
8465 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
8467 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
8468 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
8471 2) iASL Compiler/Disassembler and Tools:
8473 Fixed a problem with the implementation of the Switch() operator where
8475 temporary variable was declared too close to the actual Switch, instead
8477 at method level. This could cause a problem if the Switch() operator is
8478 within a while loop, causing an error on the second iteration. (BZ 460)
8480 Disassembler - fix for error emitted for unknown type for target of scope
8481 operator. Now, ignore it and continue.
8483 Disassembly of an FADT now verifies the input FADT and reports any errors
8484 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
8486 Disassembly of raw data buffers with byte initialization data now
8488 each output line with the current buffer offset.
8490 Disassembly of ASF! table now includes all variable-length data fields at
8491 the end of some of the subtables.
8493 The disassembler now emits a comment if a buffer appears to be a
8494 ResourceTemplate, but cannot be disassembled as such because the EndTag
8496 not appear at the very end of the buffer.
8498 AcpiExec - Added the "-t" command line option to enable the serialized
8500 of the AML interpreter.
8502 ----------------------------------------
8503 31 August 2006. Summary of changes for version 20060831:
8505 1) ACPI CA Core Subsystem:
8507 Miscellaneous fixes for the Table Manager:
8508 - Correctly initialize internal common FADT for all 64-bit "X" fields
8509 - Fixed a couple table mapping issues during table load
8510 - Fixed a couple alignment issues for IA64
8511 - Initialize input array to zero in AcpiInitializeTables
8512 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
8515 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
8517 immediately disabled to prevent the waking GPE from firing again and to
8518 prevent other wake GPEs from interrupting the wake process.
8520 Added the AcpiGpeCount global that tracks the number of processed GPEs,
8522 be used for debugging systems with a large number of ACPI interrupts.
8524 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
8525 both the ACPICA headers and the disassembler.
8527 Example Code and Data Size: These are the sizes for the OS-independent
8528 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8529 debug version of the code includes the debug output trace mechanism and
8531 a much larger code and data size.
8534 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
8535 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
8537 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
8538 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
8541 2) iASL Compiler/Disassembler and Tools:
8543 Disassembler support for the DMAR ACPI table.
8545 ----------------------------------------
8546 23 August 2006. Summary of changes for version 20060823:
8548 1) ACPI CA Core Subsystem:
8550 The Table Manager component has been completely redesigned and
8551 reimplemented. The new design is much simpler, and reduces the overall
8553 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
8555 now possible to obtain the ACPI tables very early during kernel
8556 initialization, even before dynamic memory management is initialized.
8557 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
8559 Obsolete ACPICA interfaces:
8561 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
8564 - AcpiLoadTable: Not needed.
8565 - AcpiUnloadTable: Not needed.
8567 New ACPICA interfaces:
8569 - AcpiInitializeTables: Must be called before the table manager can be
8571 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
8572 allocated memory after it becomes available.
8573 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
8577 Other ACPICA changes:
8579 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
8581 AcpiOsUnmapMemory to free this mapping.
8582 - AcpiGetTable returns the actual mapped table. The mapping is managed
8583 internally and must not be deleted by the caller. Use of this interface
8584 causes no additional dynamic memory allocation.
8585 - AcpiFindRootPointer: Support for physical addressing has been
8587 it appeared to be unused.
8588 - The interface to AcpiOsMapMemory has changed to be consistent with the
8589 other allocation interfaces.
8590 - The interface to AcpiOsGetRootPointer has changed to eliminate
8593 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
8595 bit platforms. Was previously 64 bits on all platforms.
8596 - The interface to the ACPI Global Lock acquire/release macros have
8598 slightly since ACPICA no longer keeps a local copy of the FACS with a
8599 constructed pointer to the actual global lock.
8601 Porting to the new table manager:
8603 - AcpiInitializeTables: Must be called once, and can be called anytime
8604 during the OS initialization process. It allows the host to specify an
8606 of memory to be used to store the internal version of the RSDT/XSDT (root
8607 table). This allows the host to access ACPI tables before memory
8609 is initialized and running.
8610 - AcpiReallocateRootTable: Can be called after memory management is
8612 to copy the root table to a dynamically allocated array, freeing up the
8613 scratch memory specified in the call to AcpiInitializeTables.
8614 - AcpiSubsystemInitialize: This existing interface is independent of the
8615 Table Manager, and does not have to be called before the Table Manager
8617 be used, it only must be called before the rest of ACPICA can be used.
8618 - ACPI Tables: Some changes have been made to the names and structure of
8620 actbl.h and actbl1.h header files and may require changes to existing
8622 For example, bitfields have been completely removed because of their lack
8624 portability across C compilers.
8625 - Update interfaces to the Global Lock acquire/release macros if local
8626 versions are used. (see acwin.h)
8628 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
8632 Example Code and Data Size: These are the sizes for the OS-independent
8633 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8634 debug version of the code includes the debug output trace mechanism and
8636 a much larger code and data size.
8639 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
8640 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
8642 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
8643 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
8646 2) iASL Compiler/Disassembler and Tools:
8648 No changes for this release.
8650 ----------------------------------------
8651 21 July 2006. Summary of changes for version 20060721:
8653 1) ACPI CA Core Subsystem:
8655 The full source code for the ASL test suite used to validate the iASL
8656 compiler and the ACPICA core subsystem is being released with the ACPICA
8657 source for the first time. The source is contained in a separate package
8659 consists of over 1100 files that exercise all ASL/AML operators. The
8661 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
8665 Completed a new design and implementation for support of the ACPI Global
8666 Lock. On the OS side, the global lock is now treated as a standard AML
8667 mutex. Previously, multiple OS threads could "acquire" the global lock
8668 simultaneously. However, this could cause the BIOS to be starved out of
8670 lock - especially in cases such as the Embedded Controller driver where
8671 there is a tight coupling between the OS and the BIOS.
8673 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
8674 The Global Lock interrupt handler no longer queues the execution of a
8675 separate thread to signal the global lock semaphore. Instead, the
8677 is signaled directly from the interrupt handler.
8679 Implemented support within the AML interpreter for package objects that
8680 contain a larger AML length (package list length) than the package
8682 count. In this case, the length of the package is truncated to match the
8683 package element count. Some BIOS code apparently modifies the package
8685 on the fly, and this change supports this behavior. Provides
8687 with the MS AML interpreter. (With assistance from Fiodor Suietov)
8689 Implemented a temporary fix for the BankValue parameter of a Bank Field
8691 support all constant values, now including the Zero and One opcodes.
8692 Evaluation of this parameter must eventually be converted to a full
8694 evaluation. A not-implemented error is now returned (temporarily) for
8696 constant values for this parameter.
8698 Fixed problem reports (Fiodor Suietov) integrated:
8699 - Fix for premature object deletion after CopyObject on Operation Region
8703 Example Code and Data Size: These are the sizes for the OS-independent
8704 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8705 debug version of the code includes the debug output trace mechanism and
8707 a much larger code and data size.
8710 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
8711 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
8713 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
8714 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
8717 2) iASL Compiler/Disassembler and Tools:
8719 No changes for this release.
8721 ----------------------------------------
8722 07 July 2006. Summary of changes for version 20060707:
8724 1) ACPI CA Core Subsystem:
8726 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
8727 that do not allow the initialization of address pointers within packed
8728 structures - even though the hardware itself may support misaligned
8729 transfers. Some of the debug data structures are packed by default to
8732 Added an error message for the case where AcpiOsGetThreadId() returns
8734 A non-zero value is required by the core ACPICA code to ensure the proper
8735 operation of AML mutexes and recursive control methods.
8737 The DSDT is now the only ACPI table that determines whether the AML
8738 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
8740 the hooks for per-table 32/64 switching have been removed from the code.
8742 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
8744 Fixed a possible leak of an OwnerID in the error path of
8745 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
8746 deletion to a single place in AcpiTbUninstallTable to correct possible
8748 when using the AcpiTbDeleteTablesByType interface (with assistance from
8751 Fixed a problem with Serialized control methods where the semaphore
8752 associated with the method could be over-signaled after multiple method
8755 Fixed two issues with the locking of the internal namespace data
8757 Both the Unload() operator and AcpiUnloadTable interface now lock the
8758 namespace during the namespace deletion associated with the table unload
8759 (with assistance from Linn Crosetto.)
8761 Fixed problem reports (Valery Podrezov) integrated:
8762 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
8764 Fixed problem reports (Fiodor Suietov) integrated:
8765 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
8766 - On Address Space handler deletion, needless deactivation call (BZ 374)
8767 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
8769 - Possible memory leak, Notify sub-objects of Processor, Power,
8772 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
8773 - Minimum Length of RSDT should be validated (BZ 379)
8774 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
8776 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
8780 Example Code and Data Size: These are the sizes for the OS-independent
8781 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8782 debug version of the code includes the debug output trace mechanism and
8784 a much larger code and data size.
8787 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
8788 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
8790 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
8791 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
8794 2) iASL Compiler/Disassembler and Tools:
8796 Fixed problem reports:
8797 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
8800 ----------------------------------------
8801 23 June 2006. Summary of changes for version 20060623:
8803 1) ACPI CA Core Subsystem:
8805 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
8806 allows the type to be customized to the host OS for improved efficiency
8807 (since a spinlock is usually a very small object.)
8809 Implemented support for "ignored" bits in the ACPI registers. According
8811 the ACPI specification, these bits should be preserved when writing the
8812 registers via a read/modify/write cycle. There are 3 bits preserved in
8814 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
8816 Implemented the initial deployment of new OSL mutex interfaces. Since
8818 host operating systems have separate mutex and semaphore objects, this
8819 feature was requested. The base code now uses mutexes (and the new mutex
8820 interfaces) wherever a binary semaphore was used previously. However, for
8821 the current release, the mutex interfaces are defined as macros to map
8823 to the existing semaphore interfaces. Therefore, no OSL changes are
8825 at this time. (See acpiosxf.h)
8827 Fixed several problems with the support for the control method SyncLevel
8828 parameter. The SyncLevel now works according to the ACPI specification
8830 in concert with the Mutex SyncLevel parameter, since the current
8832 is a property of the executing thread. Mutual exclusion for control
8834 is now implemented with a mutex instead of a semaphore.
8836 Fixed three instances of the use of the C shift operator in the bitfield
8837 support code (exfldio.c) to avoid the use of a shift value larger than
8839 target data width. The behavior of C compilers is undefined in this case
8841 can cause unpredictable results, and therefore the case must be detected
8843 avoided. (Fiodor Suietov)
8845 Added an info message whenever an SSDT or OEM table is loaded dynamically
8846 via the Load() or LoadTable() ASL operators. This should improve
8848 capability since it will show exactly what tables have been loaded
8850 the tables present in the RSDT/XSDT.)
8852 Example Code and Data Size: These are the sizes for the OS-independent
8853 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8854 debug version of the code includes the debug output trace mechanism and
8856 a much larger code and data size.
8859 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
8860 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
8862 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
8863 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
8866 2) iASL Compiler/Disassembler and Tools:
8868 No changes for this release.
8870 ----------------------------------------
8871 08 June 2006. Summary of changes for version 20060608:
8873 1) ACPI CA Core Subsystem:
8875 Converted the locking mutex used for the ACPI hardware to a spinlock.
8877 change should eliminate all problems caused by attempting to acquire a
8878 semaphore at interrupt level, and it means that all ACPICA external
8879 interfaces that directly access the ACPI hardware can be safely called
8881 interrupt level. OSL code that implements the semaphore interfaces should
8883 able to eliminate any workarounds for being called at interrupt level.
8885 Fixed a regression introduced in 20060526 where the ACPI device
8886 initialization could be prematurely aborted with an AE_NOT_FOUND if a
8888 did not have an optional _INI method.
8890 Fixed an IndexField issue where a write to the Data Register should be
8891 limited in size to the AccessSize (width) of the IndexField itself. (BZ
8895 Fixed problem reports (Valery Podrezov) integrated:
8896 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
8898 Fixed problem reports (Fiodor Suietov) integrated:
8899 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
8901 Removed four global mutexes that were obsolete and were no longer being
8904 Example Code and Data Size: These are the sizes for the OS-independent
8905 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8906 debug version of the code includes the debug output trace mechanism and
8908 a much larger code and data size.
8911 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
8912 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
8914 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
8915 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
8918 2) iASL Compiler/Disassembler and Tools:
8920 Fixed a fault when using -g option (get tables from registry) on Windows
8923 Fixed problem reports integrated:
8924 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
8925 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
8927 - Global table revision override (-r) is ignored (BZ 413)
8929 ----------------------------------------
8930 26 May 2006. Summary of changes for version 20060526:
8932 1) ACPI CA Core Subsystem:
8934 Restructured, flattened, and simplified the internal interfaces for
8935 namespace object evaluation - resulting in smaller code, less CPU stack
8937 and fewer interfaces. (With assistance from Mikhail Kouzmich)
8939 Fixed a problem with the CopyObject operator where the first parameter
8941 not typed correctly for the parser, interpreter, compiler, and
8943 Caused various errors and unexpected behavior.
8945 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
8946 produced incorrect results with some C compilers. Since the behavior of C
8947 compilers when the shift value is larger than the datatype width is
8948 apparently not well defined, the interpreter now detects this condition
8950 simply returns zero as expected in all such cases. (BZ 395)
8952 Fixed problem reports (Valery Podrezov) integrated:
8953 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
8954 - Allow interpreter to handle nested method declarations (BZ 5361)
8956 Fixed problem reports (Fiodor Suietov) integrated:
8957 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
8959 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
8961 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
8962 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
8963 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
8964 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
8965 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
8966 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
8967 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
8969 - Status of the Global Initialization Handler call not used (BZ 366)
8970 - Incorrect object parameter to Global Initialization Handler (BZ 367)
8972 Example Code and Data Size: These are the sizes for the OS-independent
8973 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8974 debug version of the code includes the debug output trace mechanism and
8976 a much larger code and data size.
8979 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
8980 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
8982 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
8983 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
8986 2) iASL Compiler/Disassembler and Tools:
8988 Modified the parser to allow the names IO, DMA, and IRQ to be used as
8989 namespace identifiers with no collision with existing resource descriptor
8990 macro names. This provides compatibility with other ASL compilers and is
8991 most useful for disassembly/recompilation of existing tables without
8993 errors. (With assistance from Thomas Renninger)
8995 Disassembler: fixed an incorrect disassembly problem with the
8996 DataTableRegion and CopyObject operators. Fixed a possible fault during
8997 disassembly of some Alias operators.
8999 ----------------------------------------
9000 12 May 2006. Summary of changes for version 20060512:
9002 1) ACPI CA Core Subsystem:
9004 Replaced the AcpiOsQueueForExecution interface with a new interface named
9005 AcpiOsExecute. The major difference is that the new interface does not
9007 a Priority parameter, this appeared to be useless and has been replaced
9010 Type parameter. The Type tells the host what type of execution is being
9011 requested, such as global lock handler, notify handler, GPE handler, etc.
9012 This allows the host to queue and execute the request as appropriate for
9014 request type, possibly using different work queues and different
9016 for the various request types. This enables fixes for multithreading
9017 deadlock problems such as BZ #5534, and will require changes to all
9019 OS interface layers. (Alexey Starikovskiy and Bob Moore)
9021 Fixed a possible memory leak associated with the support for the so-
9023 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
9026 Fixed a problem with the Load() operator where a table load from an
9027 operation region could overwrite an internal table buffer by up to 7
9029 and cause alignment faults on IPF systems. (With assistance from Luming
9032 Example Code and Data Size: These are the sizes for the OS-independent
9033 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9034 debug version of the code includes the debug output trace mechanism and
9036 a much larger code and data size.
9039 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
9040 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
9042 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
9043 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
9047 2) iASL Compiler/Disassembler and Tools:
9049 Disassembler: Implemented support to cross reference the internal
9051 and automatically generate ASL External() statements for symbols not
9053 within the current table being disassembled. This will simplify the
9054 disassembly and recompilation of interdependent tables such as SSDTs
9056 these statements will no longer have to be added manually.
9058 Disassembler: Implemented experimental support to automatically detect
9059 invocations of external control methods and generate appropriate
9061 statements. This is problematic because the AML cannot be correctly
9063 until the number of arguments for each control method is known.
9065 standalone method invocations and invocations as the source operand of a
9066 Store() statement are supported.
9068 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
9069 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
9070 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
9071 more readable and likely closer to the original ASL source.
9073 ----------------------------------------
9074 21 April 2006. Summary of changes for version 20060421:
9076 1) ACPI CA Core Subsystem:
9078 Removed a device initialization optimization introduced in 20051216 where
9079 the _STA method was not run unless an _INI was also present for the same
9080 device. This optimization could cause problems because it could allow
9082 methods to be run within a not-present device subtree. (If a not-present
9083 device had no _INI, _STA would not be run, the not-present status would
9085 be discovered, and the children of the device would be incorrectly
9088 Implemented a new _STA optimization where namespace subtrees that do not
9089 contain _INI are identified and ignored during device initialization.
9090 Selectively running _STA can significantly improve boot time on large
9091 machines (with assistance from Len Brown.)
9093 Implemented support for the device initialization case where the returned
9094 _STA flags indicate a device not-present but functioning. In this case,
9096 is not run, but the device children are examined for presence, as per the
9099 Implemented an additional change to the IndexField support in order to
9100 conform to MS behavior. The value written to the Index Register is not
9101 simply a byte offset, it is a byte offset in units of the access width of
9102 the parent Index Field. (Fiodor Suietov)
9104 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
9105 interface is called during the creation of all AML operation regions, and
9106 allows the host OS to exert control over what addresses it will allow the
9107 AML code to access. Operation Regions whose addresses are disallowed will
9108 cause a runtime exception when they are actually accessed (will not
9110 or abort table loading.) See oswinxf or osunixxf for an example
9113 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
9114 interface allows the host OS to match the various "optional"
9115 interface/behavior strings for the _OSI predefined control method as
9116 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
9117 for an example implementation.
9119 Restructured and corrected various problems in the exception handling
9121 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
9122 (with assistance from Takayoshi Kochi.)
9124 Modified the Linux source converter to ignore quoted string literals
9126 converting identifiers from mixed to lower case. This will correct
9128 with the disassembler and other areas where such strings must not be
9131 The ACPI_FUNCTION_* macros no longer require quotes around the function
9132 name. This allows the Linux source converter to convert the names, now
9134 the converter ignores quoted strings.
9136 Example Code and Data Size: These are the sizes for the OS-independent
9137 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9138 debug version of the code includes the debug output trace mechanism and
9140 a much larger code and data size.
9144 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
9145 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
9147 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
9148 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
9151 2) iASL Compiler/Disassembler and Tools:
9153 Implemented 3 new warnings for iASL, and implemented multiple warning
9157 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
9159 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
9160 check for the possible timeout, a warning is issued.
9162 2) Useless operators: If an ASL operator does not specify an optional
9164 operand and it also does not use the function return value from the
9165 operator, a warning is issued since the operator effectively does
9168 3) Unreferenced objects: If a namespace object is created, but never
9169 referenced, a warning is issued. This is a warning level 2 since there
9171 cases where this is ok, such as when a secondary table is loaded that
9173 the unreferenced objects. Even so, care is taken to only flag objects
9175 don't look like they will ever be used. For example, the reserved methods
9176 (starting with an underscore) are usually not referenced because it is
9177 expected that the OS will invoke them.
9179 ----------------------------------------
9180 31 March 2006. Summary of changes for version 20060331:
9182 1) ACPI CA Core Subsystem:
9184 Implemented header file support for the following additional ACPI tables:
9185 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
9187 all current and known ACPI tables are now defined in the ACPICA headers
9189 are available for use by device drivers and other software.
9191 Implemented support to allow tables that contain ACPI names with invalid
9192 characters to be loaded. Previously, this would cause the table load to
9193 fail, but since there are several known cases of such tables on existing
9194 machines, this change was made to enable ACPI support for them. Also,
9196 matches the behavior of the Microsoft ACPI implementation.
9198 Fixed a couple regressions introduced during the memory optimization in
9200 20060317 release. The namespace node definition required additional
9201 reorganization and an internal datatype that had been changed to 8-bit
9203 restored to 32-bit. (Valery Podrezov)
9205 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
9206 could be passed through to AcpiOsReleaseObject which is unexpected. Such
9207 null pointers are now trapped and ignored, matching the behavior of the
9208 previous implementation before the deployment of AcpiOsReleaseObject.
9209 (Valery Podrezov, Fiodor Suietov)
9211 Fixed a memory mapping leak during the deletion of a SystemMemory
9213 region where a cached memory mapping was not deleted. This became a
9214 noticeable problem for operation regions that are defined within
9216 used control methods. (Dana Meyers)
9218 Reorganized the ACPI table header files into two main files: one for the
9219 ACPI tables consumed by the ACPICA core, and another for the
9221 ACPI tables that are consumed by the drivers and other software. The
9223 FADT definitions were merged into one common section and three different
9224 tables (ACPI 1.0, 1.0+, and 2.0)
9226 Example Code and Data Size: These are the sizes for the OS-independent
9227 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9228 debug version of the code includes the debug output trace mechanism and
9230 a much larger code and data size.
9233 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
9234 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
9236 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
9237 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
9240 2) iASL Compiler/Disassembler and Tools:
9242 Disassembler: Implemented support to decode and format all non-AML ACPI
9243 tables (tables other than DSDTs and SSDTs.) This includes the new tables
9244 added to the ACPICA headers, therefore all current and known ACPI tables
9248 Disassembler: The change to allow ACPI names with invalid characters also
9249 enables the disassembly of such tables. Invalid characters within names
9251 changed to '*' to make the name printable; the iASL compiler will still
9252 generate an error for such names, however, since this is an invalid ACPI
9255 Implemented an option for AcpiXtract (-a) to extract all tables found in
9257 input file. The default invocation extracts only the DSDTs and SSDTs.
9259 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
9260 makefile for the AcpiXtract utility.
9262 ----------------------------------------
9263 17 March 2006. Summary of changes for version 20060317:
9265 1) ACPI CA Core Subsystem:
9267 Implemented the use of a cache object for all internal namespace nodes.
9268 Since there are about 1000 static nodes in a typical system, this will
9269 decrease memory use for cache implementations that minimize per-
9271 overhead (such as a slab allocator.)
9273 Removed the reference count mechanism for internal namespace nodes, since
9275 was deemed unnecessary. This reduces the size of each namespace node by
9276 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
9278 and 32 bytes for the 64-bit case.
9280 Optimized several internal data structures to reduce object size on 64-
9282 platforms by packing data within the 64-bit alignment. This includes the
9283 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
9284 instances corresponding to the namespace objects.
9286 Added two new strings for the predefined _OSI method: "Windows 2001.1
9290 Split the allocation tracking mechanism out to a separate file, from
9291 utalloc.c to uttrack.c. This mechanism appears to be only useful for
9292 application-level code. Kernels may wish to not include uttrack.c in
9295 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
9297 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
9300 Code and Data Size: These are the sizes for the acpica.lib produced by
9302 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
9304 driver or OSPM code. The debug version of the code includes the debug
9306 trace mechanism and has a much larger code and data size. Note that these
9307 values will vary depending on the efficiency of the compiler and the
9308 compiler options used during generation.
9311 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
9312 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
9314 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
9315 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
9318 2) iASL Compiler/Disassembler and Tools:
9320 Implemented an ANSI C version of the acpixtract utility. This version
9322 automatically extract the DSDT and all SSDTs from the input acpidump text
9323 file and dump the binary output to separate files. It can also display a
9324 summary of the input file including the headers for each table found and
9325 will extract any single ACPI table, with any signature. (See
9326 source/tools/acpixtract)
9328 ----------------------------------------
9329 10 March 2006. Summary of changes for version 20060310:
9331 1) ACPI CA Core Subsystem:
9333 Tagged all external interfaces to the subsystem with the new
9334 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
9336 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
9337 macro. The default definition is NULL.
9339 Added the ACPI_THREAD_ID type for the return value from
9341 This allows the host to define this as necessary to simplify kernel
9342 integration. The default definition is ACPI_NATIVE_UINT.
9344 Fixed two interpreter problems related to error processing, the deletion
9346 objects, and placing invalid pointers onto the internal operator result
9347 stack. BZ 6028, 6151 (Valery Podrezov)
9349 Increased the reference count threshold where a warning is emitted for
9351 reference counts in order to eliminate unnecessary warnings on systems
9353 large namespaces (especially 64-bit.) Increased the value from 0x400 to
9356 Due to universal disagreement as to the meaning of the 'c' in the
9358 function, the ACPI_MEM_CALLOCATE macro has been renamed to
9359 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
9360 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
9363 Code and Data Size: These are the sizes for the acpica.lib produced by
9365 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
9367 driver or OSPM code. The debug version of the code includes the debug
9369 trace mechanism and has a much larger code and data size. Note that these
9370 values will vary depending on the efficiency of the compiler and the
9371 compiler options used during generation.
9374 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
9375 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
9377 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
9378 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
9381 2) iASL Compiler/Disassembler:
9383 Disassembler: implemented support for symbolic resource descriptor
9384 references. If a CreateXxxxField operator references a fixed offset
9387 resource descriptor, a name is assigned to the descriptor and the offset
9389 translated to the appropriate resource tag and pathname. The addition of
9390 this support brings the disassembled code very close to the original ASL
9391 source code and helps eliminate run-time errors when the disassembled
9393 is modified (and recompiled) in such a way as to invalidate the original
9396 Implemented support for a Descriptor Name as the last parameter to the
9398 Register() macro. This parameter was inadvertently left out of the ACPI
9399 specification, and will be added for ACPI 3.0b.
9401 Fixed a problem where the use of the "_OSI" string (versus the full path
9402 "\_OSI") caused an internal compiler error. ("No back ptr to op")
9404 Fixed a problem with the error message that occurs when an invalid string
9406 used for a _HID object (such as one with an embedded asterisk:
9408 The correct message is now displayed.
9410 ----------------------------------------
9411 17 February 2006. Summary of changes for version 20060217:
9413 1) ACPI CA Core Subsystem:
9415 Implemented a change to the IndexField support to match the behavior of
9417 Microsoft AML interpreter. The value written to the Index register is now
9419 byte offset, no longer an index based upon the width of the Data
9421 This should fix IndexField problems seen on some machines where the Data
9422 register is not exactly one byte wide. The ACPI specification will be
9423 clarified on this point.
9425 Fixed a problem where several resource descriptor types could overrun the
9426 internal descriptor buffer due to size miscalculation: VendorShort,
9427 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
9428 affect all platforms.
9430 Fixed a problem where individual resource descriptors were misaligned
9432 the internal buffer, causing alignment faults on IA64 platforms.
9434 Code and Data Size: These are the sizes for the acpica.lib produced by
9436 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
9438 driver or OSPM code. The debug version of the code includes the debug
9440 trace mechanism and has a much larger code and data size. Note that these
9441 values will vary depending on the efficiency of the compiler and the
9442 compiler options used during generation.
9445 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
9446 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
9448 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
9449 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
9452 2) iASL Compiler/Disassembler:
9454 Implemented support for new reserved names: _WDG and _WED are Microsoft
9455 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
9456 defined method (Throttling Depth Limit.)
9458 Fixed a problem where a zero-length VendorShort or VendorLong resource
9459 descriptor was incorrectly emitted as a descriptor of length one.
9461 ----------------------------------------
9462 10 February 2006. Summary of changes for version 20060210:
9464 1) ACPI CA Core Subsystem:
9466 Removed a couple of extraneous ACPI_ERROR messages that appeared during
9467 normal execution. These became apparent after the conversion from
9470 Fixed a problem where the CreateField operator could hang if the BitIndex
9472 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
9474 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
9475 failed with an exception. This also fixes a couple of related RefOf and
9476 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
9478 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
9480 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
9484 Implemented a memory cleanup at the end of the execution of each
9486 of an AML While() loop, preventing the accumulation of outstanding
9488 (Valery Podrezov, BZ 5427)
9490 Eliminated a chunk of duplicate code in the object resolution code.
9494 Fixed several warnings during the 64-bit code generation.
9496 The AcpiSrc source code conversion tool now inserts one line of
9498 after an if() statement that is followed immediately by a comment,
9500 readability of the Linux code.
9502 Code and Data Size: The current and previous library sizes for the core
9503 subsystem are shown below. These are the code and data sizes for the
9504 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9506 values do not include any ACPI driver or OSPM code. The debug version of
9508 code includes the debug output trace mechanism and has a much larger code
9509 and data size. Note that these values will vary depending on the
9511 of the compiler and the compiler options used during generation.
9514 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
9515 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
9517 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
9518 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
9521 2) iASL Compiler/Disassembler:
9523 Fixed a problem with the disassembly of a BankField operator with a
9525 expression for the BankValue parameter.
9527 ----------------------------------------
9528 27 January 2006. Summary of changes for version 20060127:
9530 1) ACPI CA Core Subsystem:
9532 Implemented support in the Resource Manager to allow unresolved
9534 references within resource package objects for the _PRT method. This
9536 is in addition to the previously implemented unresolved reference support
9537 within the AML parser. If the interpreter slack mode is enabled, these
9538 unresolved references will be passed through to the caller as a NULL
9542 Implemented and deployed new macros and functions for error and warning
9543 messages across the subsystem. These macros are simpler and generate less
9544 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
9545 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
9546 macros remain defined to allow ACPI drivers time to migrate to the new
9549 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
9551 Acquire/Release Lock OSL interfaces.
9553 Fixed a problem where Alias ASL operators are sometimes not correctly
9554 resolved, in both the interpreter and the iASL compiler.
9556 Fixed several problems with the implementation of the
9557 ConcatenateResTemplate
9558 ASL operator. As per the ACPI specification, zero length buffers are now
9559 treated as a single EndTag. One-length buffers always cause a fatal
9560 exception. Non-zero length buffers that do not end with a full 2-byte
9562 cause a fatal exception.
9564 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
9565 interface. (With assistance from Thomas Renninger)
9567 Code and Data Size: The current and previous library sizes for the core
9568 subsystem are shown below. These are the code and data sizes for the
9569 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9571 values do not include any ACPI driver or OSPM code. The debug version of
9573 code includes the debug output trace mechanism and has a much larger code
9574 and data size. Note that these values will vary depending on the
9576 of the compiler and the compiler options used during generation.
9579 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
9580 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
9582 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
9583 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
9586 2) iASL Compiler/Disassembler:
9588 Fixed an internal error that was generated for any forward references to
9592 ----------------------------------------
9593 13 January 2006. Summary of changes for version 20060113:
9595 1) ACPI CA Core Subsystem:
9597 Added 2006 copyright to all module headers and signons. This affects
9598 virtually every file in the ACPICA core subsystem, iASL compiler, and the
9601 Enhanced the ACPICA error reporting in order to simplify user migration
9603 the non-debug version of ACPICA. Replaced all instances of the
9604 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
9606 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
9607 respectively. This preserves all error and warning messages in the non-
9609 version of the ACPICA code (this has been referred to as the "debug lite"
9610 option.) Over 200 cases were converted to create a total of over 380
9611 error/warning messages across the ACPICA code. This increases the code
9613 data size of the default non-debug version of the code somewhat (about
9615 but all error/warning reporting may be disabled if desired (and code
9616 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
9617 configuration option. The size of the debug version of ACPICA remains
9621 Fixed a memory leak within the AML Debugger "Set" command. One object was
9622 not properly deleted for every successful invocation of the command.
9624 Code and Data Size: The current and previous library sizes for the core
9625 subsystem are shown below. These are the code and data sizes for the
9626 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9628 values do not include any ACPI driver or OSPM code. The debug version of
9630 code includes the debug output trace mechanism and has a much larger code
9631 and data size. Note that these values will vary depending on the
9633 of the compiler and the compiler options used during generation.
9636 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
9637 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
9639 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
9640 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
9643 2) iASL Compiler/Disassembler:
9645 The compiler now officially supports the ACPI 3.0a specification that was
9646 released on December 30, 2005. (Specification is available at
9649 ----------------------------------------
9650 16 December 2005. Summary of changes for version 20051216:
9652 1) ACPI CA Core Subsystem:
9654 Implemented optional support to allow unresolved names within ASL Package
9655 objects. A null object is inserted in the package when a named reference
9656 cannot be located in the current namespace. Enabled via the interpreter
9657 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
9659 that contain such code.
9661 Implemented an optimization to the initialization sequence that can
9663 boot time. During ACPI device initialization, the _STA method is now run
9665 and only if the _INI method exists. The _STA method is used to determine
9667 the device is present; An _INI can only be run if _STA returns present,
9669 it is a waste of time to run the _STA method if the _INI does not exist.
9670 (Prototype and assistance from Dong Wei)
9672 Implemented use of the C99 uintptr_t for the pointer casting macros if it
9674 available in the current compiler. Otherwise, the default (void *) cast
9678 Fixed some possible memory leaks found within the execution path of the
9679 Break, Continue, If, and CreateField operators. (Valery Podrezov)
9681 Fixed a problem introduced in the 20051202 release where an exception is
9682 generated during method execution if a control method attempts to declare
9685 Moved resource descriptor string constants that are used by both the AML
9686 disassembler and AML debugger to the common utilities directory so that
9687 these components are independent.
9689 Implemented support in the AcpiExec utility (-e switch) to globally
9691 exceptions during control method execution (method is not aborted.)
9693 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
9696 Code and Data Size: The current and previous library sizes for the core
9697 subsystem are shown below. These are the code and data sizes for the
9698 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9700 values do not include any ACPI driver or OSPM code. The debug version of
9702 code includes the debug output trace mechanism and has a much larger code
9703 and data size. Note that these values will vary depending on the
9705 of the compiler and the compiler options used during generation.
9708 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
9709 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
9711 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
9712 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
9715 2) iASL Compiler/Disassembler:
9717 Fixed a problem where a CPU stack overflow fault could occur if a
9719 method call was made from within a Return statement.
9721 ----------------------------------------
9722 02 December 2005. Summary of changes for version 20051202:
9724 1) ACPI CA Core Subsystem:
9726 Modified the parsing of control methods to no longer create namespace
9727 objects during the first pass of the parse. Objects are now created only
9728 during the execute phase, at the moment the namespace creation operator
9730 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
9732 should eliminate ALREADY_EXISTS exceptions seen on some machines where
9733 reentrant control methods are protected by an AML mutex. The mutex will
9735 correctly block multiple threads from attempting to create the same
9739 Increased the number of available Owner Ids for namespace object tracking
9740 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
9742 some machines with a large number of ACPI tables (either static or
9745 Fixed a problem with the AcpiExec utility where a fault could occur when
9747 -b switch (batch mode) is used.
9749 Enhanced the namespace dump routine to output the owner ID for each
9752 Code and Data Size: The current and previous library sizes for the core
9753 subsystem are shown below. These are the code and data sizes for the
9754 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9756 values do not include any ACPI driver or OSPM code. The debug version of
9758 code includes the debug output trace mechanism and has a much larger code
9759 and data size. Note that these values will vary depending on the
9761 of the compiler and the compiler options used during generation.
9764 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
9765 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
9767 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
9768 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
9771 2) iASL Compiler/Disassembler:
9773 Fixed a parse error during compilation of certain Switch/Case constructs.
9775 simplify the parse, the grammar now allows for multiple Default
9777 and this error is now detected and flagged during the analysis phase.
9779 Disassembler: The disassembly now includes the contents of the original
9780 table header within a comment at the start of the file. This includes the
9781 name and version of the original ASL compiler.
9783 ----------------------------------------
9784 17 November 2005. Summary of changes for version 20051117:
9786 1) ACPI CA Core Subsystem:
9788 Fixed a problem in the AML parser where the method thread count could be
9789 decremented below zero if any errors occurred during the method parse
9791 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
9793 This also fixed a related regression with the mechanism that detects and
9794 corrects methods that cannot properly handle reentrancy (related to the
9795 deployment of the new OwnerId mechanism.)
9797 Eliminated the pre-parsing of control methods (to detect errors) during
9798 table load. Related to the problem above, this was causing unwind issues
9800 any errors occurred during the parse, and it seemed to be overkill. A
9802 load should not be aborted if there are problems with any single control
9803 method, thus rendering this feature rather pointless.
9805 Fixed a problem with the new table-driven resource manager where an
9807 buffer overflow could occur for small resource templates.
9809 Implemented a new external interface, AcpiGetVendorResource. This
9811 will find and return a vendor-defined resource descriptor within a _CRS
9813 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
9816 Removed the length limit (200) on string objects as per the upcoming ACPI
9817 3.0A specification. This affects the following areas of the interpreter:
9819 any implicit conversion of a Buffer to a String, 2) a String object
9821 of the ASL Concatentate operator, 3) the String object result of the ASL
9824 Fixed a problem in the Windows OS interface layer (OSL) where a
9826 on a semaphore object would incorrectly timeout. This allows the
9827 multithreading features of the AcpiExec utility to work properly under
9830 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
9831 the recently added file named "utresrc.c".
9833 Code and Data Size: The current and previous library sizes for the core
9834 subsystem are shown below. These are the code and data sizes for the
9835 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9837 values do not include any ACPI driver or OSPM code. The debug version of
9839 code includes the debug output trace mechanism and has a much larger code
9840 and data size. Note that these values will vary depending on the
9842 of the compiler and the compiler options used during generation.
9845 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
9846 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
9848 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
9849 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
9852 2) iASL Compiler/Disassembler:
9854 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
9855 specification. For the iASL compiler, this means that string literals
9857 the source ASL can be of any length.
9859 Enhanced the listing output to dump the AML code for resource descriptors
9860 immediately after the ASL code for each descriptor, instead of in a block
9862 the end of the entire resource template.
9864 Enhanced the compiler debug output to dump the entire original parse tree
9865 constructed during the parse phase, before any transforms are applied to
9867 tree. The transformed tree is dumped also.
9869 ----------------------------------------
9870 02 November 2005. Summary of changes for version 20051102:
9872 1) ACPI CA Core Subsystem:
9874 Modified the subsystem initialization sequence to improve GPE support.
9876 GPE initialization has been split into two parts in order to defer
9878 of the _PRW methods (Power Resources for Wake) until after the hardware
9880 fully initialized and the SCI handler is installed. This allows the _PRW
9881 methods to access fields protected by the Global Lock. This will fix
9883 where a NO_GLOBAL_LOCK exception has been seen during initialization.
9885 Converted the ACPI internal object disassemble and display code within
9887 AML debugger to fully table-driven operation, reducing code size and
9888 increasing maintainability.
9890 Fixed a regression with the ConcatenateResTemplate() ASL operator
9892 in the 20051021 release.
9894 Implemented support for "local" internal ACPI object types within the
9895 debugger "Object" command and the AcpiWalkNamespace external interfaces.
9896 These local types include RegionFields, BankFields, IndexFields, Alias,
9900 Moved common AML resource handling code into a new file, "utresrc.c".
9902 code is shared by both the Resource Manager and the AML Debugger.
9904 Code and Data Size: The current and previous library sizes for the core
9905 subsystem are shown below. These are the code and data sizes for the
9906 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9908 values do not include any ACPI driver or OSPM code. The debug version of
9910 code includes the debug output trace mechanism and has a much larger code
9911 and data size. Note that these values will vary depending on the
9913 of the compiler and the compiler options used during generation.
9916 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
9917 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
9919 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
9920 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
9923 2) iASL Compiler/Disassembler:
9925 Fixed a problem with very large initializer lists (more than 4000
9927 for both Buffer and Package objects where the parse stack could overflow.
9929 Enhanced the pre-compile source code scan for non-ASCII characters to
9931 characters within comment fields. The scan is now always performed and is
9933 longer optional, detecting invalid characters within a source file
9934 immediately rather than during the parse phase or later.
9936 Enhanced the ASL grammar definition to force early reductions on all
9938 style grammar elements so that the overall parse stack usage is greatly
9939 reduced. This should improve performance and reduce the possibility of
9943 Eliminated all reduce/reduce conflicts in the iASL parser generation.
9945 with the addition of a %expected statement, the compiler generates from
9946 source with no warnings.
9948 Fixed a possible segment fault in the disassembler if the input filename
9949 does not contain a "dot" extension (Thomas Renninger).
9951 ----------------------------------------
9952 21 October 2005. Summary of changes for version 20051021:
9954 1) ACPI CA Core Subsystem:
9956 Implemented support for the EM64T and other x86-64 processors. This
9957 essentially entails recognizing that these processors support non-aligned
9958 memory transfers. Previously, all 64-bit processors were assumed to lack
9959 hardware support for non-aligned transfers.
9961 Completed conversion of the Resource Manager to nearly full table-driven
9962 operation. Specifically, the resource conversion code (convert AML to
9963 internal format and the reverse) and the debug code to dump internal
9964 resource descriptors are fully table-driven, reducing code and data size
9966 improving maintainability.
9968 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
9970 on 64-bit processors instead of a fixed 32-bit word. (With assistance
9972 Alexey Starikovskiy)
9974 Implemented support within the resource conversion code for the Type-
9975 Specific byte within the various ACPI 3.0 *WordSpace macros.
9977 Fixed some issues within the resource conversion code for the type-
9979 flags for both Memory and I/O address resource descriptors. For Memory,
9980 implemented support for the MTP and TTP flags. For I/O, split the TRS and
9981 TTP flags into two separate fields.
9983 Code and Data Size: The current and previous library sizes for the core
9984 subsystem are shown below. These are the code and data sizes for the
9985 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9987 values do not include any ACPI driver or OSPM code. The debug version of
9989 code includes the debug output trace mechanism and has a much larger code
9990 and data size. Note that these values will vary depending on the
9992 of the compiler and the compiler options used during generation.
9995 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
9996 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
9998 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
9999 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
10003 2) iASL Compiler/Disassembler:
10005 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
10007 corresponding ResourceSource string was not also present in a resource
10008 descriptor declaration. This restriction caused problems with existing
10009 AML/ASL code that includes the Index byte without the string. When such
10011 was disassembled, it could not be compiled without modification. Further,
10012 the modified code created a resource template with a different size than
10014 original, breaking code that used fixed offsets into the resource
10018 Removed a recent feature of the disassembler to ignore a lone
10020 byte. This byte is now emitted if present so that the exact AML can be
10021 reproduced when the disassembled code is recompiled.
10023 Improved comments and text alignment for the resource descriptor code
10024 emitted by the disassembler.
10026 Implemented disassembler support for the ACPI 3.0 AccessSize field within
10028 Register() resource descriptor.
10030 ----------------------------------------
10031 30 September 2005. Summary of changes for version 20050930:
10033 1) ACPI CA Core Subsystem:
10035 Completed a major overhaul of the Resource Manager code - specifically,
10036 optimizations in the area of the AML/internal resource conversion code.
10038 code has been optimized to simplify and eliminate duplicated code, CPU
10040 use has been decreased by optimizing function parameters and local
10041 variables, and naming conventions across the manager have been
10043 for clarity and ease of maintenance (this includes function, parameter,
10044 variable, and struct/typedef names.) The update may force changes in some
10045 driver code, depending on how resources are handled by the host OS.
10047 All Resource Manager dispatch and information tables have been moved to a
10048 single location for clarity and ease of maintenance. One new file was
10049 created, named "rsinfo.c".
10051 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
10052 guarantee that the argument is not evaluated twice, making them less
10054 to macro side-effects. However, since there exists the possibility of
10055 additional stack use if a particular compiler cannot optimize them (such
10057 in the debug generation case), the original macros are optionally
10059 Note that some invocations of the return_VALUE macro may now cause size
10060 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
10062 eliminate these. (From Randy Dunlap)
10064 Implemented a new mechanism to enable debug tracing for individual
10066 methods. A new external interface, AcpiDebugTrace, is provided to enable
10067 this mechanism. The intent is to allow the host OS to easily enable and
10068 disable tracing for problematic control methods. This interface can be
10069 easily exposed to a user or debugger interface if desired. See the file
10070 psxface.c for details.
10072 AcpiUtCallocate will now return a valid pointer if a length of zero is
10073 specified - a length of one is used and a warning is issued. This matches
10074 the behavior of AcpiUtAllocate.
10076 Code and Data Size: The current and previous library sizes for the core
10077 subsystem are shown below. These are the code and data sizes for the
10078 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10080 values do not include any ACPI driver or OSPM code. The debug version of
10082 code includes the debug output trace mechanism and has a much larger code
10083 and data size. Note that these values will vary depending on the
10085 of the compiler and the compiler options used during generation.
10088 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
10089 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
10091 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
10092 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
10095 2) iASL Compiler/Disassembler:
10097 A remark is issued if the effective compile-time length of a package or
10098 buffer is zero. Previously, this was a warning.
10100 ----------------------------------------
10101 16 September 2005. Summary of changes for version 20050916:
10103 1) ACPI CA Core Subsystem:
10105 Fixed a problem within the Resource Manager where support for the Generic
10106 Register descriptor was not fully implemented. This descriptor is now
10108 recognized, parsed, disassembled, and displayed.
10110 Completely restructured the Resource Manager code to utilize table-driven
10111 dispatch and lookup, eliminating many of the large switch() statements.
10113 reduces overall subsystem code size and code complexity. Affects the
10114 resource parsing and construction, disassembly, and debug dump output.
10116 Cleaned up and restructured the debug dump output for all resource
10117 descriptors. Improved readability of the output and reduced code size.
10119 Fixed a problem where changes to internal data structures caused the
10120 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
10122 Code and Data Size: The current and previous library sizes for the core
10123 subsystem are shown below. These are the code and data sizes for the
10124 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10126 values do not include any ACPI driver or OSPM code. The debug version of
10128 code includes the debug output trace mechanism and has a much larger code
10129 and data size. Note that these values will vary depending on the
10131 of the compiler and the compiler options used during generation.
10134 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
10135 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
10137 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
10138 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
10141 2) iASL Compiler/Disassembler:
10143 Updated the disassembler to automatically insert an EndDependentFn()
10145 into the ASL stream if this macro is missing in the original AML code,
10146 simplifying compilation of the resulting ASL module.
10148 Fixed a problem in the disassembler where a disassembled ResourceSource
10149 string (within a large resource descriptor) was not surrounded by quotes
10151 not followed by a comma, causing errors when the resulting ASL module was
10152 compiled. Also, escape sequences within a ResourceSource string are now
10153 handled correctly (especially "\\")
10155 ----------------------------------------
10156 02 September 2005. Summary of changes for version 20050902:
10158 1) ACPI CA Core Subsystem:
10160 Fixed a problem with the internal Owner ID allocation and deallocation
10161 mechanisms for control method execution and recursive method invocation.
10162 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
10163 messages seen on some systems. Recursive method invocation depth is
10164 currently limited to 255. (Alexey Starikovskiy)
10166 Completely eliminated all vestiges of support for the "module-level
10167 executable code" until this support is fully implemented and debugged.
10169 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
10170 some systems that invoke this support.
10172 Fixed a problem within the resource manager code where the transaction
10174 for a 64-bit address descriptor were handled incorrectly in the type-
10175 specific flag byte.
10177 Consolidated duplicate code within the address descriptor resource
10179 code, reducing overall subsystem code size.
10181 Fixed a fault when using the AML debugger "disassemble" command to
10182 disassemble individual control methods.
10184 Removed references to the "release_current" directory within the Unix
10187 Code and Data Size: The current and previous core subsystem library sizes
10188 are shown below. These are the code and data sizes for the acpica.lib
10189 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
10190 include any ACPI driver or OSPM code. The debug version of the code
10192 the debug output trace mechanism and has a much larger code and data
10194 Note that these values will vary depending on the efficiency of the
10196 and the compiler options used during generation.
10199 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
10200 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
10202 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
10203 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
10206 2) iASL Compiler/Disassembler:
10208 Implemented an error check for illegal duplicate values in the interrupt
10210 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
10213 Implemented error checking for the Irq() and IrqNoFlags() macros to
10215 too many values in the interrupt list (16 max) and invalid values in the
10216 list (range 0 - 15)
10218 The maximum length string literal within an ASL file is now restricted to
10219 200 characters as per the ACPI specification.
10221 Fixed a fault when using the -ln option (generate namespace listing).
10223 Implemented an error check to determine if a DescriptorName within a
10224 resource descriptor has already been used within the current scope.
10226 ----------------------------------------
10227 15 August 2005. Summary of changes for version 20050815:
10229 1) ACPI CA Core Subsystem:
10231 Implemented a full bytewise compare to determine if a table load request
10233 attempting to load a duplicate table. The compare is performed if the
10235 signatures and table lengths match. This will allow different tables with
10236 the same OEM Table ID and revision to be loaded - probably against the
10238 specification, but discovered in the field nonetheless.
10240 Added the changes.txt logfile to each of the zipped release packages.
10242 Code and Data Size: Current and previous core subsystem library sizes are
10243 shown below. These are the code and data sizes for the acpica.lib
10245 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10246 any ACPI driver or OSPM code. The debug version of the code includes the
10247 debug output trace mechanism and has a much larger code and data size.
10249 that these values will vary depending on the efficiency of the compiler
10251 the compiler options used during generation.
10254 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
10255 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
10257 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
10258 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
10261 2) iASL Compiler/Disassembler:
10263 Fixed a problem where incorrect AML code could be generated for Package
10264 objects if optimization is disabled (via the -oa switch).
10266 Fixed a problem with where incorrect AML code is generated for variable-
10267 length packages when the package length is not specified and the number
10269 initializer values is greater than 255.
10272 ----------------------------------------
10273 29 July 2005. Summary of changes for version 20050729:
10275 1) ACPI CA Core Subsystem:
10277 Implemented support to ignore an attempt to install/load a particular
10279 table more than once. Apparently there exists BIOS code that repeatedly
10280 attempts to load the same SSDT upon certain events. With assistance from
10281 Venkatesh Pallipadi.
10283 Restructured the main interface to the AML parser in order to correctly
10284 handle all exceptional conditions. This will prevent leakage of the
10286 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
10288 machines. With assistance from Alexey Starikovskiy.
10290 Support for "module level code" has been disabled in this version due to
10292 number of issues that have appeared on various machines. The support can
10294 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
10295 compilation. When the issues are fully resolved, the code will be enabled
10299 Modified the internal functions for debug print support to define the
10300 FunctionName parameter as a (const char *) for compatibility with
10302 built-in macros such as __FUNCTION__, etc.
10304 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
10306 Implemented support to display an object count summary for the AML
10308 commands Object and Methods.
10310 Code and Data Size: Current and previous core subsystem library sizes are
10311 shown below. These are the code and data sizes for the acpica.lib
10313 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10314 any ACPI driver or OSPM code. The debug version of the code includes the
10315 debug output trace mechanism and has a much larger code and data size.
10317 that these values will vary depending on the efficiency of the compiler
10319 the compiler options used during generation.
10322 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
10323 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
10325 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
10326 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
10329 2) iASL Compiler/Disassembler:
10331 Fixed a regression that appeared in the 20050708 version of the compiler
10332 where an error message was inadvertently emitted for invocations of the
10334 reserved control method.
10336 ----------------------------------------
10337 08 July 2005. Summary of changes for version 20050708:
10339 1) ACPI CA Core Subsystem:
10341 The use of the CPU stack in the debug version of the subsystem has been
10342 considerably reduced. Previously, a debug structure was declared in every
10343 function that used the debug macros. This structure has been removed in
10344 favor of declaring the individual elements as parameters to the debug
10345 functions. This reduces the cumulative stack use during nested execution
10347 ACPI function calls at the cost of a small increase in the code size of
10349 debug version of the subsystem. With assistance from Alexey Starikovskiy
10353 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
10354 headers to define a macro that will return the current function name at
10355 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
10357 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
10358 compiler-dependent header, the function name is saved on the CPU stack
10360 pointer per function.) This mechanism is used because apparently there
10361 exists no standard ANSI-C defined macro that that returns the function
10364 Redesigned and reimplemented the "Owner ID" mechanism used to track
10365 namespace objects created/deleted by ACPI tables and control method
10366 execution. A bitmap is now used to allocate and free the IDs, thus
10368 the wraparound problem present in the previous implementation. The size
10370 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
10373 Removed the UINT32_BIT and UINT16_BIT types that were used for the
10375 flag definitions within the headers for the predefined ACPI tables. These
10376 have been replaced by UINT8_BIT in order to increase the code portability
10378 the subsystem. If the use of UINT8 remains a problem, we may be forced to
10379 eliminate bitfields entirely because of a lack of portability.
10381 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
10383 is a frequently used function and this improvement increases the
10385 of the entire subsystem (Alexey Starikovskiy).
10387 Fixed several possible memory leaks and the inverse - premature object
10388 deletion (Alexey Starikovskiy).
10390 Code and Data Size: Current and previous core subsystem library sizes are
10391 shown below. These are the code and data sizes for the acpica.lib
10393 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10394 any ACPI driver or OSPM code. The debug version of the code includes the
10395 debug output trace mechanism and has a much larger code and data size.
10397 that these values will vary depending on the efficiency of the compiler
10399 the compiler options used during generation.
10402 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
10403 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
10405 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
10406 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
10408 ----------------------------------------
10409 24 June 2005. Summary of changes for version 20050624:
10411 1) ACPI CA Core Subsystem:
10413 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
10414 the host-defined cache object. This allows the OSL implementation to
10416 and type this object in any manner desired, simplifying the OSL
10417 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
10418 Linux, and should be defined in the OS-specific header file for other
10419 operating systems as required.
10421 Changed the interface to AcpiOsAcquireObject to directly return the
10422 requested object as the function return (instead of ACPI_STATUS.) This
10423 change was made for performance reasons, since this is the purpose of the
10424 interface in the first place. AcpiOsAcquireObject is now similar to the
10425 AcpiOsAllocate interface.
10427 Implemented a new AML debugger command named Businfo. This command
10429 information about all devices that have an associate _PRT object. The
10431 _HID, _UID, and _CID are displayed for these devices.
10433 Modified the initialization sequence in AcpiInitializeSubsystem to call
10435 OSL interface AcpiOslInitialize first, before any local initialization.
10437 change was required because the global initialization now calls OSL
10440 Enhanced the Dump command to display the entire contents of Package
10442 (including all sub-objects and their values.)
10444 Restructured the code base to split some files because of size and/or
10445 because the code logically belonged in a separate file. New files are
10447 below. All makefiles and project files included in the ACPI CA release
10450 utilities/utcache.c /* Local cache interfaces */
10451 utilities/utmutex.c /* Local mutex support */
10452 utilities/utstate.c /* State object support */
10453 interpreter/parser/psloop.c /* Main AML parse loop */
10455 Code and Data Size: Current and previous core subsystem library sizes are
10456 shown below. These are the code and data sizes for the acpica.lib
10458 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10459 any ACPI driver or OSPM code. The debug version of the code includes the
10460 debug output trace mechanism and has a much larger code and data size.
10462 that these values will vary depending on the efficiency of the compiler
10464 the compiler options used during generation.
10467 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
10468 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
10470 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
10471 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
10474 2) iASL Compiler/Disassembler:
10476 Fixed a regression introduced in version 20050513 where the use of a
10478 object within a Case() statement caused a compile time exception. The
10479 original behavior has been restored (a Match() operator is emitted.)
10481 ----------------------------------------
10482 17 June 2005. Summary of changes for version 20050617:
10484 1) ACPI CA Core Subsystem:
10486 Moved the object cache operations into the OS interface layer (OSL) to
10488 the host OS to handle these operations if desired (for example, the Linux
10489 OSL will invoke the slab allocator). This support is optional; the
10491 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
10493 code in the ACPI CA core. The new OSL interfaces are shown below. See
10494 utalloc.c for an example implementation, and acpiosxf.h for the exact
10495 interface definitions. With assistance from Alexey Starikovskiy.
10499 AcpiOsAcquireObject
10500 AcpiOsReleaseObject
10502 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
10504 and restore a flags parameter. This fits better with many OS lock models.
10505 Note: the current execution state (interrupt handler or not) is no longer
10506 passed to these interfaces. If necessary, the OSL must determine this
10508 by itself, a simple and fast operation. With assistance from Alexey
10511 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
10512 present if the revision of the RSDP was 2 or greater. According to the
10514 specification, the XSDT is optional in all cases, and the table manager
10515 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
10516 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
10520 Fixed an interpreter problem with the Mid() operator in the case of an
10522 string where the resulting output string is of zero length. It now
10524 returns a valid, null terminated string object instead of a string object
10525 with a null pointer.
10527 Fixed a problem with the control method argument handling to allow a
10529 to an Arg object that already contains an object of type Device. The
10531 object is now correctly overwritten. Previously, an error was returned.
10534 Enhanced the debugger Find command to emit object values in addition to
10536 found object pathnames. The output format is the same as the dump
10540 Enhanced the debugger Set command. It now has the ability to set the
10542 of any Named integer object in the namespace (Previously, only method
10544 and args could be set.)
10546 Code and Data Size: Current and previous core subsystem library sizes are
10547 shown below. These are the code and data sizes for the acpica.lib
10549 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10550 any ACPI driver or OSPM code. The debug version of the code includes the
10551 debug output trace mechanism and has a much larger code and data size.
10553 that these values will vary depending on the efficiency of the compiler
10555 the compiler options used during generation.
10558 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
10559 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
10561 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
10562 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
10565 2) iASL Compiler/Disassembler:
10567 Fixed a regression in the disassembler where if/else/while constructs
10569 output incorrectly. This problem was introduced in the previous release
10570 (20050526). This problem also affected the single-step disassembly in the
10573 Fixed a problem where compiling the reserved _OSI method would randomly
10575 rarely) produce compile errors.
10577 Enhanced the disassembler to emit compilable code in the face of
10579 AML resource descriptors. If the optional ResourceSourceIndex is present,
10580 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
10581 disassembly. Otherwise, the resulting code cannot be compiled without
10584 ----------------------------------------
10585 26 May 2005. Summary of changes for version 20050526:
10587 1) ACPI CA Core Subsystem:
10589 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
10590 the module level (not within a control method.) These opcodes are
10592 exactly once at the time the table is loaded. This type of code was legal
10594 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
10596 order to provide backwards compatibility with earlier BIOS
10598 This eliminates the "Encountered executable code at module level" warning
10599 that was previously generated upon detection of such code.
10601 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
10602 inadvertently be generated during the lookup of namespace objects in the
10603 second pass parse of ACPI tables and control methods. It appears that
10605 problem could occur during the resolution of forward references to
10609 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
10610 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
10611 allows the deadlock detection debug code to be compiled out in the normal
10612 case, improving mutex performance (and overall subsystem performance)
10615 Implemented a handful of miscellaneous fixes for possible memory leaks on
10616 error conditions and error handling control paths. These fixes were
10617 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
10619 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
10621 to prevent a fault in this error case.
10623 Code and Data Size: Current and previous core subsystem library sizes are
10624 shown below. These are the code and data sizes for the acpica.lib
10626 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10627 any ACPI driver or OSPM code. The debug version of the code includes the
10628 debug output trace mechanism and has a much larger code and data size.
10630 that these values will vary depending on the efficiency of the compiler
10632 the compiler options used during generation.
10635 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
10636 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
10638 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
10639 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
10642 2) iASL Compiler/Disassembler:
10644 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
10645 the module level (not within a control method.) These operators will be
10646 executed once at the time the table is loaded. This type of code was
10648 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
10649 compiler in order to provide backwards compatibility with earlier BIOS
10653 The ACPI integer width (specified via the table revision ID or the -r
10654 override, 32 or 64 bits) is now used internally during compile-time
10656 folding to ensure that constants are truncated to 32 bits if necessary.
10657 Previously, the revision ID value was only emitted in the AML table
10660 An error message is now generated for the Mutex and Method operators if
10662 SyncLevel parameter is outside the legal range of 0 through 15.
10664 Fixed a problem with the Method operator ParameterTypes list handling
10666 3.0). Previously, more than 2 types or 2 arguments generated a syntax
10668 The actual underlying implementation of method argument typechecking is
10669 still under development, however.
10671 ----------------------------------------
10672 13 May 2005. Summary of changes for version 20050513:
10674 1) ACPI CA Core Subsystem:
10676 Implemented support for PCI Express root bridges -- added support for
10678 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
10680 The interpreter now automatically truncates incoming 64-bit constants to
10682 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
10684 also affects the iASL compiler constant folding. (Note: as per below, the
10685 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
10687 Fixed a problem where string and buffer objects with "static" pointers
10688 (pointers to initialization data within an ACPI table) were not handled
10689 consistently. The internal object copy operation now always copies the
10691 to a newly allocated buffer, regardless of whether the source object is
10694 Fixed a problem with the FromBCD operator where an implicit result
10695 conversion was improperly performed while storing the result to the
10697 operand. Since this is an "explicit conversion" operator, the implicit
10698 conversion should never be performed on the output.
10700 Fixed a problem with the CopyObject operator where a copy to an existing
10701 named object did not always completely overwrite the existing object
10703 at name. Specifically, a buffer-to-buffer copy did not delete the
10707 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
10709 structs for consistency.
10711 Code and Data Size: Current and previous core subsystem library sizes are
10712 shown below. These are the code and data sizes for the acpica.lib
10714 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10715 any ACPI driver or OSPM code. The debug version of the code includes the
10716 debug output trace mechanism and has a much larger code and data size.
10718 that these values will vary depending on the efficiency of the compiler
10720 the compiler options used during generation.
10723 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
10724 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
10725 Current Release: (Same sizes)
10726 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
10727 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
10730 2) iASL Compiler/Disassembler:
10732 The compiler now emits a warning if an attempt is made to generate a 64-
10734 integer constant from within a 32-bit ACPI table (Revision < 2). The
10736 is truncated to 32 bits.
10738 Fixed a problem with large package objects: if the static length of the
10739 package is greater than 255, the "variable length package" opcode is
10740 emitted. Previously, this caused an error. This requires an update to the
10741 ACPI spec, since it currently (incorrectly) states that packages larger
10743 255 elements are not allowed.
10745 The disassembler now correctly handles variable length packages and
10747 larger than 255 elements.
10749 ----------------------------------------
10750 08 April 2005. Summary of changes for version 20050408:
10752 1) ACPI CA Core Subsystem:
10754 Fixed three cases in the interpreter where an "index" argument to an ASL
10755 function was still (internally) 32 bits instead of the required 64 bits.
10756 This was the Index argument to the Index, Mid, and Match operators.
10758 The "strupr" function is now permanently local (AcpiUtStrupr), since this
10760 not a POSIX-defined function and not present in most kernel-level C
10761 libraries. All references to the C library strupr function have been
10765 Completed the deployment of static functions/prototypes. All prototypes
10767 the static attribute have been moved from the headers to the owning C
10770 Implemented an extract option (-e) for the AcpiBin utility (AML binary
10771 utility). This option allows the utility to extract individual ACPI
10773 from the output of AcpiDmp. It provides the same functionality of the
10774 acpixtract.pl perl script without the worry of setting the correct perl
10775 options. AcpiBin runs on Windows and has not yet been generated/validated
10777 the Linux/Unix environment (but should be soon).
10779 Updated and fixed the table dump option for AcpiBin (-d). This option
10780 converts a single ACPI table to a hex/ascii file, similar to the output
10784 Code and Data Size: Current and previous core subsystem library sizes are
10785 shown below. These are the code and data sizes for the acpica.lib
10787 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10788 any ACPI driver or OSPM code. The debug version of the code includes the
10789 debug output trace mechanism and has a much larger code and data size.
10791 that these values will vary depending on the efficiency of the compiler
10793 the compiler options used during generation.
10796 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
10797 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
10799 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
10800 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
10803 2) iASL Compiler/Disassembler:
10805 Disassembler fix: Added a check to ensure that the table length found in
10807 ACPI table header within the input file is not longer than the actual
10809 file size. This indicates some kind of file or table corruption.
10811 ----------------------------------------
10812 29 March 2005. Summary of changes for version 20050329:
10814 1) ACPI CA Core Subsystem:
10816 An error is now generated if an attempt is made to create a Buffer Field
10818 length zero (A CreateField with a length operand of zero.)
10820 The interpreter now issues a warning whenever executable code at the
10822 level is detected during ACPI table load. This will give some idea of the
10823 prevalence of this type of code.
10825 Implemented support for references to named objects (other than control
10826 methods) within package objects.
10828 Enhanced package object output for the debug object. Package objects are
10830 completely dumped, showing all elements.
10832 Enhanced miscellaneous object output for the debug object. Any object can
10833 now be written to the debug object (for example, a device object can be
10834 written, and the type of the object will be displayed.)
10836 The "static" qualifier has been added to all local functions across both
10838 core subsystem and the iASL compiler.
10840 The number of "long" lines (> 80 chars) within the source has been
10841 significantly reduced, by about 1/3.
10843 Cleaned up all header files to ensure that all CA/iASL functions are
10844 prototyped (even static functions) and the formatting is consistent.
10846 Two new header files have been added, acopcode.h and acnames.h.
10848 Removed several obsolete functions that were no longer used.
10850 Code and Data Size: Current and previous core subsystem library sizes are
10851 shown below. These are the code and data sizes for the acpica.lib
10853 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10854 any ACPI driver or OSPM code. The debug version of the code includes the
10855 debug output trace mechanism and has a much larger code and data size.
10857 that these values will vary depending on the efficiency of the compiler
10859 the compiler options used during generation.
10862 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
10863 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
10865 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
10866 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
10870 2) iASL Compiler/Disassembler:
10872 Fixed a problem with the resource descriptor generation/support. For the
10873 ResourceSourceIndex and the ResourceSource fields, both must be present,
10875 both must be not present - can't have one without the other.
10877 The compiler now returns non-zero from the main procedure if any errors
10879 occurred during the compilation.
10882 ----------------------------------------
10883 09 March 2005. Summary of changes for version 20050309:
10885 1) ACPI CA Core Subsystem:
10887 The string-to-buffer implicit conversion code has been modified again
10889 a change to the ACPI specification. In order to match the behavior of
10891 other major ACPI implementation, the target buffer is no longer truncated
10893 the source string is smaller than an existing target buffer. This change
10894 requires an update to the ACPI spec, and should eliminate the recent
10895 AE_AML_BUFFER_LIMIT issues.
10897 The "implicit return" support was rewritten to a new algorithm that
10899 the general case. Rather than attempt to determine when a method is about
10901 exit, the result of every ASL operator is saved momentarily until the
10903 next ASL operator is executed. Therefore, no matter how the method exits,
10904 there will always be a saved implicit return value. This feature is only
10905 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
10907 AE_AML_NO_RETURN_VALUE errors when enabled.
10909 Implemented implicit conversion support for the predicate (operand) of
10911 If, Else, and While operators. String and Buffer arguments are
10913 converted to Integers.
10915 Changed the string-to-integer conversion behavior to match the new ACPI
10916 errata: "If no integer object exists, a new integer is created. The ASCII
10917 string is interpreted as a hexadecimal constant. Each string character is
10918 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
10919 with the first character as the most significant digit, and ending with
10921 first non-hexadecimal character or end-of-string." This means that the
10923 non-hex character terminates the conversion and this is the code that was
10926 Fixed a problem where the ObjectType operator would fail (fault) when
10928 on an Index of a Package which pointed to a null package element. The
10929 operator now properly returns zero (Uninitialized) in this case.
10931 Fixed a problem where the While operator used excessive memory by not
10932 properly popping the result stack during execution. There was no memory
10934 after execution, however. (Code provided by Valery Podrezov.)
10936 Fixed a problem where references to control methods within Package
10938 caused the method to be invoked, instead of producing a reference object
10939 pointing to the method.
10941 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
10943 improve performance and reduce code size. (Code provided by Alexey
10946 Code and Data Size: Current and previous core subsystem library sizes are
10947 shown below. These are the code and data sizes for the acpica.lib
10949 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10950 any ACPI driver or OSPM code. The debug version of the code includes the
10951 debug output trace mechanism and has a much larger code and data size.
10953 that these values will vary depending on the efficiency of the compiler
10955 the compiler options used during generation.
10958 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
10959 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
10961 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
10962 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
10965 2) iASL Compiler/Disassembler:
10967 Fixed a problem with the Return operator with no arguments. Since the AML
10968 grammar for the byte encoding requires an operand for the Return opcode,
10970 compiler now emits a Return(Zero) for this case. An ACPI specification
10971 update has been written for this case.
10973 For tables other than the DSDT, namepath optimization is automatically
10974 disabled. This is because SSDTs can be loaded anywhere in the namespace,
10976 compiler has no knowledge of where, and thus cannot optimize namepaths.
10978 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
10979 inadvertently omitted from the ACPI specification, and will require an
10980 update to the spec.
10982 The source file scan for ASCII characters is now optional (-a). This
10984 was made because some vendors place non-ascii characters within comments.
10985 However, the scan is simply a brute-force byte compare to ensure all
10986 characters in the file are in the range 0x00 to 0x7F.
10988 Fixed a problem with the CondRefOf operator where the compiler was
10989 inappropriately checking for the existence of the target. Since the point
10991 the operator is to check for the existence of the target at run-time, the
10992 compiler no longer checks for the target existence.
10994 Fixed a problem where errors generated from the internal AML interpreter
10995 during constant folding were not handled properly, causing a fault.
10997 Fixed a problem with overly aggressive range checking for the Stall
10998 operator. The valid range (max 255) is now only checked if the operand is
11000 type Integer. All other operand types cannot be statically checked.
11002 Fixed a problem where control method references within the RefOf,
11004 and ObjectType operators were not treated properly. They are now treated
11006 actual references, not method invocations.
11008 Fixed and enhanced the "list namespace" option (-ln). This option was
11010 a number of releases ago.
11012 Improved error handling for the Field, IndexField, and BankField
11014 The compiler now cleanly reports and recovers from errors in the field
11015 component (FieldUnit) list.
11017 Fixed a disassembler problem where the optional ResourceDescriptor fields
11018 TRS and TTP were not always handled correctly.
11020 Disassembler - Comments in output now use "//" instead of "/*"
11022 ----------------------------------------
11023 28 February 2005. Summary of changes for version 20050228:
11025 1) ACPI CA Core Subsystem:
11027 Fixed a problem where the result of an Index() operator (an object
11028 reference) must increment the reference count on the target object for
11030 life of the object reference.
11032 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
11033 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
11035 resource descriptors.
11037 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
11038 Space Descriptor" string, indicating interpreter support for the
11042 Implemented header support for the new ACPI 3.0 FADT flag bits.
11044 Implemented header support for the new ACPI 3.0 PCI Express bits for the
11046 status/enable registers.
11048 Updated header support for the MADT processor local Apic struct and MADT
11049 platform interrupt source struct for new ACPI 3.0 fields.
11051 Implemented header support for the SRAT and SLIT ACPI tables.
11053 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
11057 Code and Data Size: Current and previous core subsystem library sizes are
11058 shown below. These are the code and data sizes for the acpica.lib
11060 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11061 any ACPI driver or OSPM code. The debug version of the code includes the
11062 debug output trace mechanism and has a much larger code and data size.
11064 that these values will vary depending on the efficiency of the compiler
11066 the compiler options used during generation.
11069 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
11070 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
11072 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
11073 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
11076 2) iASL Compiler/Disassembler:
11078 Fixed a problem with the internal 64-bit String-to-integer conversion
11080 strings less than two characters long.
11082 Fixed a problem with constant folding where the result of the Index()
11083 operator can not be considered a constant. This means that Index() cannot
11085 a type3 opcode and this will require an update to the ACPI specification.
11087 Disassembler: Implemented support for the TTP, MTP, and TRS resource
11088 descriptor fields. These fields were inadvertently ignored and not output
11090 the disassembly of the resource descriptor.
11093 ----------------------------------------
11094 11 February 2005. Summary of changes for version 20050211:
11096 1) ACPI CA Core Subsystem:
11098 Implemented ACPI 3.0 support for implicit conversion within the Match()
11099 operator. MatchObjects can now be of type integer, buffer, or string
11101 of just type integer. Package elements are implicitly converted to the
11103 of the MatchObject. This change aligns the behavior of Match() with the
11104 behavior of the other logical operators (LLess(), etc.) It also requires
11106 errata change to the ACPI specification as this support was intended for
11107 ACPI 3.0, but was inadvertently omitted.
11109 Fixed a problem with the internal implicit "to buffer" conversion.
11111 that are converted to buffers will cause buffer truncation if the string
11113 smaller than the target buffer. Integers that are converted to buffers
11115 not cause buffer truncation, only zero extension (both as per the ACPI
11116 spec.) The problem was introduced when code was added to truncate the
11117 buffer, but this should not be performed in all cases, only the string
11120 Fixed a problem with the Buffer and Package operators where the
11122 would get confused if two such operators were used as operands to an ASL
11123 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
11124 stack was not being popped after the execution of these operators,
11126 in an AE_NO_RETURN_VALUE exception.
11128 Fixed a problem with constructs of the form Store(Index(...),...). The
11129 reference object returned from Index was inadvertently resolved to an
11131 value. This problem was introduced in version 20050114 when the behavior
11133 Store() was modified to restrict the object types that can be used as the
11134 source operand (to match the ACPI specification.)
11136 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
11138 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
11140 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
11142 Code and Data Size: Current and previous core subsystem library sizes are
11143 shown below. These are the code and data sizes for the acpica.lib
11145 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11146 any ACPI driver or OSPM code. The debug version of the code includes the
11147 debug output trace mechanism and has a much larger code and data size.
11149 that these values will vary depending on the efficiency of the compiler
11151 the compiler options used during generation.
11154 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
11155 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
11157 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
11158 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
11161 2) iASL Compiler/Disassembler:
11163 Fixed a code generation problem in the constant folding optimization code
11164 where incorrect code was generated if a constant was reduced to a buffer
11165 object (i.e., a reduced type 5 opcode.)
11167 Fixed a typechecking problem for the ToBuffer operator. Caused by an
11168 incorrect return type in the internal opcode information table.
11170 ----------------------------------------
11171 25 January 2005. Summary of changes for version 20050125:
11173 1) ACPI CA Core Subsystem:
11175 Fixed a recently introduced problem with the Global Lock where the
11176 underlying semaphore was not created. This problem was introduced in
11177 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
11178 Acquire() operation on _GL.
11180 The local object cache is now optional, and is disabled by default. Both
11181 AcpiExec and the iASL compiler enable the cache because they run in user
11182 mode and this enhances their performance. #define
11183 ACPI_ENABLE_OBJECT_CACHE
11184 to enable the local cache.
11186 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
11188 optional "implicit return" support where an error was returned if no
11190 object was expected, but one was implicitly returned. AE_OK is now
11192 in this case and the implicitly returned object is deleted.
11193 AcpiUtEvaluateObject is only occasionally used, and only to execute
11195 methods such as _STA and _INI where the return type is known up front.
11197 Fixed a few issues with the internal convert-to-integer code. It now
11199 an error if an attempt is made to convert a null string, a string of only
11200 blanks/tabs, or a zero-length buffer. This affects both implicit
11202 and explicit conversion via the ToInteger() operator.
11204 The internal debug code in AcpiUtAcquireMutex has been commented out. It
11206 not needed for normal operation and should increase the performance of
11208 entire subsystem. The code remains in case it is needed for debug
11212 The AcpiExec source and makefile are included in the Unix/Linux package
11216 Code and Data Size: Current and previous core subsystem library sizes are
11217 shown below. These are the code and data sizes for the acpica.lib
11219 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11220 any ACPI driver or OSPM code. The debug version of the code includes the
11221 debug output trace mechanism and has a much larger code and data size.
11223 that these values will vary depending on the efficiency of the compiler
11225 the compiler options used during generation.
11228 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
11229 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
11231 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
11232 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
11234 2) iASL Compiler/Disassembler:
11236 Switch/Case support: A warning is now issued if the type of the Switch
11238 cannot be determined at compile time. For example, Switch(Arg0) will
11239 generate the warning, and the type is assumed to be an integer. As per
11241 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
11245 Switch/Case support: Implemented support for buffer and string objects as
11246 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
11247 buffers and strings.
11249 Switch/Case support: The emitted code for the LEqual() comparisons now
11251 the switch value as the first operand, not the second. The case value is
11253 the second operand, and this allows the case value to be implicitly
11254 converted to the type of the switch value, not the other way around.
11256 Switch/Case support: Temporary variables are now emitted immediately
11258 the control method, not at the global level. This means that there are
11260 36 temps available per-method, not 36 temps per-module as was the case
11262 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
11264 ----------------------------------------
11265 14 January 2005. Summary of changes for version 20050114:
11267 Added 2005 copyright to all module headers. This affects every module in
11268 the core subsystem, iASL compiler, and the utilities.
11270 1) ACPI CA Core Subsystem:
11272 Fixed an issue with the String-to-Buffer conversion code where the string
11273 null terminator was not included in the buffer after conversion, but
11275 is existing ASL that assumes the string null terminator is included. This
11277 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
11278 introduced in the previous version when the code was updated to correctly
11279 set the converted buffer size as per the ACPI specification. The ACPI
11281 is ambiguous and will be updated to specify that the null terminator must
11283 included in the converted buffer. This also affects the ToBuffer() ASL
11286 Fixed a problem with the Mid() ASL/AML operator where it did not work
11287 correctly on Buffer objects. Newly created sub-buffers were not being
11292 Fixed a problem in AcpiTbFindTable where incorrect string compares were
11293 performed on the OemId and OemTableId table header fields. These fields
11295 not null terminated, so strncmp is now used instead of strcmp.
11297 Implemented a restriction on the Store() ASL/AML operator to align the
11298 behavior with the ACPI specification. Previously, any object could be
11300 as the source operand. Now, the only objects that may be used are
11302 Buffers, Strings, Packages, Object References, and DDB Handles. If
11303 necessary, the original behavior can be restored by enabling the
11304 EnableInterpreterSlack flag.
11306 Enhanced the optional "implicit return" support to allow an implicit
11308 value from methods that are invoked externally via the AcpiEvaluateObject
11309 interface. This enables implicit returns from the _STA and _INI methods,
11312 Changed the Revision() ASL/AML operator to return the current version of
11314 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
11316 the supported ACPI version (This is the function of the _REV method).
11318 Updated the _REV predefined method to return the currently supported
11322 Implemented batch mode option for the AcpiExec utility (-b).
11324 Code and Data Size: Current and previous core subsystem library sizes are
11325 shown below. These are the code and data sizes for the acpica.lib
11327 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11328 any ACPI driver or OSPM code. The debug version of the code includes the
11329 debug output trace mechanism and has a much larger code and data size.
11331 that these values will vary depending on the efficiency of the compiler
11333 the compiler options used during generation.
11336 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
11337 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
11339 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
11340 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
11342 ----------------------------------------
11343 10 December 2004. Summary of changes for version 20041210:
11345 ACPI 3.0 support is nearing completion in both the iASL compiler and the
11346 ACPI CA core subsystem.
11348 1) ACPI CA Core Subsystem:
11350 Fixed a problem in the ToDecimalString operator where the resulting
11352 length was incorrectly calculated. The length is now calculated exactly,
11353 eliminating incorrect AE_STRING_LIMIT exceptions.
11355 Fixed a problem in the ToHexString operator to allow a maximum 200
11357 string to be produced.
11359 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
11361 routine where the length of the resulting buffer was not truncated to the
11362 new size (if the target buffer already existed).
11364 Code and Data Size: Current and previous core subsystem library sizes are
11365 shown below. These are the code and data sizes for the acpica.lib
11367 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11368 any ACPI driver or OSPM code. The debug version of the code includes the
11369 debug output trace mechanism and has a much larger code and data size.
11371 that these values will vary depending on the efficiency of the compiler
11373 the compiler options used during generation.
11376 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
11377 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
11379 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
11380 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
11383 2) iASL Compiler/Disassembler:
11385 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
11386 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
11387 Includes support in the disassembler.
11389 Implemented support for the new (ACPI 3.0) parameter to the Register
11393 Fixed a problem where the _HE resource name for the Interrupt macro was
11394 referencing bit 0 instead of bit 1.
11396 Implemented check for maximum 255 interrupts in the Interrupt macro.
11398 Fixed a problem with the predefined resource descriptor names where
11399 incorrect AML code was generated if the offset within the resource buffer
11400 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
11401 but did not update the surrounding package lengths.
11403 Changes to the Dma macro: All channels within the channel list must be
11405 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
11406 optional (default is BusMaster).
11408 Implemented check for maximum 7 data bytes for the VendorShort macro.
11410 The ReadWrite parameter is now optional for the Memory32 and similar
11413 ----------------------------------------
11414 03 December 2004. Summary of changes for version 20041203:
11416 1) ACPI CA Core Subsystem:
11418 The low-level field insertion/extraction code (exfldio) has been
11420 rewritten to eliminate unnecessary complexity, bugs, and boundary
11423 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
11425 operators where the input operand could be inadvertently deleted if no
11426 conversion was necessary (e.g., if the input to ToInteger was an Integer
11429 Fixed a problem with the ToDecimalString and ToHexString where an
11431 exception code was returned if the resulting string would be > 200 chars.
11432 AE_STRING_LIMIT is now returned.
11434 Fixed a problem with the Concatenate operator where AE_OK was always
11435 returned, even if the operation failed.
11437 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
11438 semaphores to be allocated.
11440 Code and Data Size: Current and previous core subsystem library sizes are
11441 shown below. These are the code and data sizes for the acpica.lib
11443 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11444 any ACPI driver or OSPM code. The debug version of the code includes the
11445 debug output trace mechanism and has a much larger code and data size.
11447 that these values will vary depending on the efficiency of the compiler
11449 the compiler options used during generation.
11452 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
11453 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
11455 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
11456 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
11459 2) iASL Compiler/Disassembler:
11461 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
11462 recently introduced in 20041119.
11464 Fixed a problem with the ToUUID macro where the upper nybble of each
11466 byte was inadvertently set to zero.
11468 ----------------------------------------
11469 19 November 2004. Summary of changes for version 20041119:
11471 1) ACPI CA Core Subsystem:
11473 Fixed a problem in the internal ConvertToInteger routine where new
11475 were not truncated to 32 bits for 32-bit ACPI tables. This routine
11477 buffers and strings to integers.
11479 Implemented support to store a value to an Index() on a String object.
11481 is an ACPI 2.0 feature that had not yet been implemented.
11483 Implemented new behavior for storing objects to individual package
11485 (via the Index() operator). The previous behavior was to invoke the
11487 conversion rules if an object was already present at the index. The new
11488 behavior is to simply delete any existing object and directly store the
11490 object. Although the ACPI specification seems unclear on this subject,
11492 ACPI implementations behave in this manner. (This is the root of the
11493 AE_BAD_HEX_CONSTANT issue.)
11495 Modified the RSDP memory scan mechanism to support the extended checksum
11497 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
11498 RSDP signature is found with a valid checksum.
11500 Code and Data Size: Current and previous core subsystem library sizes are
11501 shown below. These are the code and data sizes for the acpica.lib
11503 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11504 any ACPI driver or OSPM code. The debug version of the code includes the
11505 debug output trace mechanism and has a much larger code and data size.
11507 that these values will vary depending on the efficiency of the compiler
11509 the compiler options used during generation.
11512 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
11513 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
11515 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
11516 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
11519 2) iASL Compiler/Disassembler:
11521 Fixed a missing semicolon in the aslcompiler.y file.
11523 ----------------------------------------
11524 05 November 2004. Summary of changes for version 20041105:
11526 1) ACPI CA Core Subsystem:
11528 Implemented support for FADT revision 2. This was an interim table
11530 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
11532 Implemented optional support to allow uninitialized LocalX and ArgX
11533 variables in a control method. The variables are initialized to an
11535 object with a value of zero. This support is enabled by setting the
11536 AcpiGbl_EnableInterpreterSlack flag to TRUE.
11538 Implemented support for Integer objects for the SizeOf operator. Either
11540 or 8 is returned, depending on the current integer size (32-bit or 64-
11542 depending on the parent table revision).
11544 Fixed a problem in the implementation of the SizeOf and ObjectType
11546 where the operand was resolved to a value too early, causing incorrect
11547 return values for some objects.
11549 Fixed some possible memory leaks during exceptional conditions.
11551 Code and Data Size: Current and previous core subsystem library sizes are
11552 shown below. These are the code and data sizes for the acpica.lib
11554 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11555 any ACPI driver or OSPM code. The debug version of the code includes the
11556 debug output trace mechanism and has a much larger code and data size.
11558 that these values will vary depending on the efficiency of the compiler
11560 the compiler options used during generation.
11563 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
11564 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
11566 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
11567 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
11570 2) iASL Compiler/Disassembler:
11572 Implemented support for all ACPI 3.0 reserved names and methods.
11574 Implemented all ACPI 3.0 grammar elements in the front-end, including
11575 support for semicolons.
11577 Implemented the ACPI 3.0 Function() and ToUUID() macros
11579 Fixed a problem in the disassembler where a Scope() operator would not be
11580 emitted properly if the target of the scope was in another table.
11582 ----------------------------------------
11583 15 October 2004. Summary of changes for version 20041015:
11585 Note: ACPI CA is currently undergoing an in-depth and complete formal
11586 evaluation to test/verify the following areas. Other suggestions are
11587 welcome. This will result in an increase in the frequency of releases and
11588 the number of bug fixes in the next few months.
11589 - Functional tests for all ASL/AML operators
11590 - All implicit/explicit type conversions
11591 - Bit fields and operation regions
11592 - 64-bit math support and 32-bit-only "truncated" math support
11593 - Exceptional conditions, both compiler and interpreter
11594 - Dynamic object deletion and memory leaks
11595 - ACPI 3.0 support when implemented
11596 - External interfaces to the ACPI subsystem
11599 1) ACPI CA Core Subsystem:
11601 Fixed two alignment issues on 64-bit platforms - within debug statements
11603 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
11605 field within the non-aligned ACPI generic address structure.
11607 Fixed a problem in the Increment and Decrement operators where incorrect
11608 operand resolution could result in the inadvertent modification of the
11609 original integer when the integer is passed into another method as an
11610 argument and the arg is then incremented/decremented.
11612 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
11614 BCD number were truncated during conversion.
11616 Fixed a problem in the ToDecimal operator where the length of the
11618 string could be set incorrectly too long if the input operand was a
11622 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
11624 within a buffer would prematurely terminate a compare between buffer
11627 Added a check for string overflow (>200 characters as per the ACPI
11628 specification) during the Concatenate operator with two string operands.
11630 Code and Data Size: Current and previous core subsystem library sizes are
11631 shown below. These are the code and data sizes for the acpica.lib
11633 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11634 any ACPI driver or OSPM code. The debug version of the code includes the
11635 debug output trace mechanism and has a much larger code and data size.
11637 that these values will vary depending on the efficiency of the compiler
11639 the compiler options used during generation.
11642 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
11643 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
11645 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
11646 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
11650 2) iASL Compiler/Disassembler:
11652 Allow the use of the ObjectType operator on uninitialized Locals and Args
11653 (returns 0 as per the ACPI specification).
11655 Fixed a problem where the compiler would fault if there was a syntax
11657 in the FieldName of all of the various CreateXXXField operators.
11659 Disallow the use of lower case letters within the EISAID macro, as per
11661 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
11663 U is an uppercase letter and N is a hex digit.
11666 ----------------------------------------
11667 06 October 2004. Summary of changes for version 20041006:
11669 1) ACPI CA Core Subsystem:
11671 Implemented support for the ACPI 3.0 Timer operator. This ASL function
11672 implements a 64-bit timer with 100 nanosecond granularity.
11674 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
11675 implement the ACPI 3.0 Timer operator. This allows the host OS to
11677 the timer with the best clock available. Also, it keeps the core
11679 out of the clock handling business, since the host OS (usually) performs
11682 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
11683 functions use a 64-bit address which is part of the packed ACPI Generic
11684 Address Structure. Since the structure is non-aligned, the alignment
11686 are now used to extract the address to a local variable before use.
11688 Fixed a problem where the ToInteger operator assumed all input strings
11690 hexadecimal. The operator now handles both decimal strings and hex
11692 (prefixed with "0x").
11694 Fixed a problem where the string length in the string object created as a
11695 result of the internal ConvertToString procedure could be incorrect. This
11696 potentially affected all implicit conversions and also the
11698 and ToHexString operators.
11700 Fixed two problems in the ToString operator. If the length parameter was
11701 zero, an incorrect string object was created and the value of the input
11702 length parameter was inadvertently changed from zero to Ones.
11704 Fixed a problem where the optional ResourceSource string in the
11706 resource macro was ignored.
11708 Simplified the interfaces to the internal division functions, reducing
11710 size and complexity.
11712 Code and Data Size: Current and previous core subsystem library sizes are
11713 shown below. These are the code and data sizes for the acpica.lib
11715 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11716 any ACPI driver or OSPM code. The debug version of the code includes the
11717 debug output trace mechanism and has a much larger code and data size.
11719 that these values will vary depending on the efficiency of the compiler
11721 the compiler options used during generation.
11724 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
11725 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
11727 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
11728 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
11731 2) iASL Compiler/Disassembler:
11733 Implemented support for the ACPI 3.0 Timer operator.
11735 Fixed a problem where the Default() operator was inadvertently ignored in
11737 Switch/Case block. This was a problem in the translation of the Switch
11738 statement to If...Else pairs.
11740 Added support to allow a standalone Return operator, with no parentheses
11744 Fixed a problem with code generation for the ElseIf operator where the
11745 translated Else...If parse tree was improperly constructed leading to the
11748 ----------------------------------------
11749 22 September 2004. Summary of changes for version 20040922:
11751 1) ACPI CA Core Subsystem:
11753 Fixed a problem with the implementation of the LNot() operator where
11755 was not returned for the TRUE case. Changed the code to return Ones
11757 of (!Arg) which was usually 1. This change affects iASL constant folding
11759 this operator also.
11761 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
11763 initialized properly -- Now zero the entire buffer in this case where the
11764 buffer already exists.
11766 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
11767 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
11768 related code considerably. This will require changes/updates to all OS
11769 interface layers (OSLs.)
11771 Implemented a new external interface, AcpiInstallExceptionHandler, to
11773 a system exception handler to be installed. This handler is invoked upon
11775 run-time exception that occurs during control method execution.
11777 Added support for the DSDT in AcpiTbFindTable. This allows the
11778 DataTableRegion() operator to access the local copy of the DSDT.
11780 Code and Data Size: Current and previous core subsystem library sizes are
11781 shown below. These are the code and data sizes for the acpica.lib
11783 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11784 any ACPI driver or OSPM code. The debug version of the code includes the
11785 debug output trace mechanism and has a much larger code and data size.
11787 that these values will vary depending on the efficiency of the compiler
11789 the compiler options used during generation.
11792 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
11793 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
11795 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
11796 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
11799 2) iASL Compiler/Disassembler:
11801 Fixed a problem with constant folding and the LNot operator. LNot was
11802 returning 1 in the TRUE case, not Ones as per the ACPI specification.
11804 could result in the generation of an incorrect folded/reduced constant.
11806 End-Of-File is now allowed within a "//"-style comment. A parse error no
11807 longer occurs if such a comment is at the very end of the input ASL
11811 Implemented the "-r" option to override the Revision in the table header.
11812 The initial use of this option will be to simplify the evaluation of the
11814 interpreter by allowing a single ASL source module to be compiled for
11816 32-bit or 64-bit integers.
11819 ----------------------------------------
11820 27 August 2004. Summary of changes for version 20040827:
11822 1) ACPI CA Core Subsystem:
11824 - Implemented support for implicit object conversion in the non-numeric
11825 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
11827 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
11828 the second operand is implicitly converted on the fly to match the type
11830 the first operand. For example:
11832 LEqual (Source1, Source2)
11834 Source1 and Source2 must each evaluate to an integer, a string, or a
11836 The data type of Source1 dictates the required type of Source2. Source2
11838 implicitly converted if necessary to match the type of Source1.
11840 - Updated and corrected the behavior of the string conversion support.
11842 rules concerning conversion of buffers to strings (according to the ACPI
11843 specification) are as follows:
11845 ToDecimalString - explicit byte-wise conversion of buffer to string of
11846 decimal values (0-255) separated by commas. ToHexString - explicit byte-
11848 conversion of buffer to string of hex values (0-FF) separated by commas.
11849 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
11851 copy with no transform except NULL terminated. Any other implicit buffer-
11853 string conversion - byte-wise conversion of buffer to string of hex
11855 (0-FF) separated by spaces.
11857 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
11859 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
11861 one byte too short in the case of a node in the root scope. This could
11862 cause a fault during debug output.
11864 - Code and Data Size: Current and previous core subsystem library sizes
11866 shown below. These are the code and data sizes for the acpica.lib
11868 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11869 any ACPI driver or OSPM code. The debug version of the code includes the
11870 debug output trace mechanism and has a much larger code and data size.
11872 that these values will vary depending on the efficiency of the compiler
11874 the compiler options used during generation.
11877 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
11878 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
11880 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
11881 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
11884 2) iASL Compiler/Disassembler:
11886 - Fixed a Linux generation error.
11889 ----------------------------------------
11890 16 August 2004. Summary of changes for version 20040816:
11892 1) ACPI CA Core Subsystem:
11894 Designed and implemented support within the AML interpreter for the so-
11895 called "implicit return". This support returns the result of the last
11897 operation within a control method, in the absence of an explicit Return()
11898 operator. A few machines depend on this behavior, even though it is not
11899 explicitly supported by the ASL language. It is optional support that
11901 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
11903 Removed support for the PCI_Config address space from the internal low
11905 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
11906 support was not used internally, and would not work correctly anyway
11908 the PCI bus number and segment number were not supported. There are
11909 separate interfaces for PCI configuration space access because of the
11913 Code and Data Size: Current and previous core subsystem library sizes are
11914 shown below. These are the code and data sizes for the acpica.lib
11916 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11917 any ACPI driver or OSPM code. The debug version of the code includes the
11918 debug output trace mechanism and has a much larger code and data size.
11920 that these values will vary depending on the efficiency of the compiler
11922 the compiler options used during generation.
11925 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
11926 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
11928 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
11929 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
11932 2) iASL Compiler/Disassembler:
11934 Fixed a problem where constants in ASL expressions at the root level (not
11935 within a control method) could be inadvertently truncated during code
11936 generation. This problem was introduced in the 20040715 release.
11939 ----------------------------------------
11940 15 July 2004. Summary of changes for version 20040715:
11942 1) ACPI CA Core Subsystem:
11944 Restructured the internal HW GPE interfaces to pass/track the current
11946 of interrupts (enabled/disabled) in order to avoid possible deadlock and
11947 increase flexibility of the interfaces.
11949 Implemented a "lexicographical compare" for String and Buffer objects
11951 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
11953 as per further clarification to the ACPI specification. Behavior is
11955 to C library "strcmp".
11957 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
11958 external function. In the 32-bit non-debug case, the stack use has been
11959 reduced from 168 bytes to 32 bytes.
11961 Deployed a new run-time configuration flag,
11962 AcpiGbl_EnableInterpreterSlack,
11963 whose purpose is to allow the AML interpreter to forgive certain bad AML
11964 constructs. Default setting is FALSE.
11966 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
11968 support code. If enabled, it allows field access to go beyond the end of
11970 region definition if the field is within the region length rounded up to
11972 next access width boundary (a common coding error.)
11974 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
11975 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
11977 symbols are lowercased by the latest version of the AcpiSrc tool.
11979 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
11980 rename "Register" to simply "Reg" to prevent certain compilers from
11983 Code and Data Size: Current and previous core subsystem library sizes are
11984 shown below. These are the code and data sizes for the acpica.lib
11986 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11987 any ACPI driver or OSPM code. The debug version of the code includes the
11988 debug output trace mechanism and has a much larger code and data size.
11990 that these values will vary depending on the efficiency of the compiler
11992 the compiler options used during generation.
11995 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
11996 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
11998 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
11999 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
12002 2) iASL Compiler/Disassembler:
12004 Implemented full support for Package objects within the Case() operator.
12005 Note: The Break() operator is currently not supported within Case blocks
12006 (TermLists) as there is some question about backward compatibility with
12011 Fixed a problem where complex terms were not supported properly within
12015 Eliminated extraneous warning for compiler-emitted reserved names of the
12016 form "_T_x". (Used in Switch/Case operators.)
12018 Eliminated optimization messages for "_T_x" objects and small constants
12019 within the DefinitionBlock operator.
12022 ----------------------------------------
12023 15 June 2004. Summary of changes for version 20040615:
12025 1) ACPI CA Core Subsystem:
12027 Implemented support for Buffer and String objects (as per ACPI 2.0) for
12029 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
12032 All directory names in the entire source package are lower case, as they
12033 were in earlier releases.
12035 Implemented "Disassemble" command in the AML debugger that will
12037 a single control method.
12039 Code and Data Size: Current and previous core subsystem library sizes are
12040 shown below. These are the code and data sizes for the acpica.lib
12042 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12043 any ACPI driver or OSPM code. The debug version of the code includes the
12044 debug output trace mechanism and has a much larger code and data size.
12046 that these values will vary depending on the efficiency of the compiler
12048 the compiler options used during generation.
12051 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
12052 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
12055 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
12056 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
12059 2) iASL Compiler/Disassembler:
12061 Implemented support for Buffer and String objects (as per ACPI 2.0) for
12063 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
12066 All directory names in the entire source package are lower case, as they
12067 were in earlier releases.
12069 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
12072 Fixed an issue with the Windows version of the compiler where later
12074 of Windows place the FADT in the registry under the name "FADT" and not
12075 "FACP" as earlier versions did. This applies when using the -g or -
12076 d<nofilename> options. The compiler now looks for both strings as
12079 Fixed a problem with compiler namepath optimization where a namepath
12081 the Scope() operator could not be optimized if the namepath was a subpath
12083 the current scope path.
12085 ----------------------------------------
12086 27 May 2004. Summary of changes for version 20040527:
12088 1) ACPI CA Core Subsystem:
12090 Completed a new design and implementation for EBDA (Extended BIOS Data
12092 support in the RSDP scan code. The original code improperly scanned for
12094 EBDA by simply scanning from memory location 0 to 0x400. The correct
12096 is to first obtain the EBDA pointer from within the BIOS data area, then
12097 scan 1K of memory starting at the EBDA pointer. There appear to be few
12099 any machines that place the RSDP in the EBDA, however.
12101 Integrated a fix for a possible fault during evaluation of BufferField
12102 arguments. Obsolete code that was causing the problem was removed.
12104 Found and fixed a problem in the Field Support Code where data could be
12105 corrupted on a bit field read that starts on an aligned boundary but does
12106 not end on an aligned boundary. Merged the read/write "datum length"
12107 calculation code into a common procedure.
12109 Rolled in a couple of changes to the FreeBSD-specific header.
12112 Code and Data Size: Current and previous core subsystem library sizes are
12113 shown below. These are the code and data sizes for the acpica.lib
12115 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12116 any ACPI driver or OSPM code. The debug version of the code includes the
12117 debug output trace mechanism and has a much larger code and data size.
12119 that these values will vary depending on the efficiency of the compiler
12121 the compiler options used during generation.
12124 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
12125 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
12127 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
12128 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
12131 2) iASL Compiler/Disassembler:
12133 Fixed a generation warning produced by some overly-verbose compilers for
12137 ----------------------------------------
12138 14 May 2004. Summary of changes for version 20040514:
12140 1) ACPI CA Core Subsystem:
12142 Fixed a problem where hardware GPE enable bits sometimes not set properly
12143 during and after GPE method execution. Result of 04/27 changes.
12145 Removed extra "clear all GPEs" when sleeping/waking.
12147 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
12148 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
12150 the new AcpiEv* calls as appropriate.
12152 ACPI_OS_NAME was removed from the OS-specific headers. The default name
12154 now "Microsoft Windows NT" for maximum compatibility. However this can
12156 changed by modifying the acconfig.h file.
12158 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
12159 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
12161 Run _INI methods on ThermalZone objects. This is against the ACPI
12162 specification, but there is apparently ASL code in the field that has
12164 _INI methods, and apparently "other" AML interpreters execute them.
12166 Performed a full 16/32/64 bit lint that resulted in some small changes.
12168 Added a sleep simulation command to the AML debugger to test sleep code.
12170 Code and Data Size: Current and previous core subsystem library sizes are
12171 shown below. These are the code and data sizes for the acpica.lib
12173 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12174 any ACPI driver or OSPM code. The debug version of the code includes the
12175 debug output trace mechanism and has a much larger code and data size.
12177 that these values will vary depending on the efficiency of the compiler
12179 the compiler options used during generation.
12182 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
12183 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
12185 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
12186 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
12188 ----------------------------------------
12189 27 April 2004. Summary of changes for version 20040427:
12191 1) ACPI CA Core Subsystem:
12193 Completed a major overhaul of the GPE handling within ACPI CA. There are
12194 now three types of GPEs: wake-only, runtime-only, and combination
12196 The only GPEs allowed to be combination wake/run are for button-style
12197 devices such as a control-method power button, control-method sleep
12199 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
12201 referenced by any _PRW methods are marked for "runtime" and hardware
12202 enabled. Any GPE that is referenced by a _PRW method is marked for
12204 (and disabled at runtime). However, at sleep time, only those GPEs that
12205 have been specifically enabled for wake via the AcpiEnableGpe interface
12207 actually be hardware enabled.
12209 A new external interface has been added, AcpiSetGpeType(), that is meant
12211 be used by device drivers to force a GPE to a particular type. It will
12213 especially useful for the drivers for the button devices mentioned above.
12215 Completed restructuring of the ACPI CA initialization sequence so that
12216 default operation region handlers are installed before GPEs are
12218 and the _PRW methods are executed. This will prevent errors when the
12220 methods attempt to access system memory or I/O space.
12222 GPE enable/disable no longer reads the GPE enable register. We now keep
12224 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
12225 thus no longer depend on the hardware to maintain these bits.
12227 Always clear the wake status and fixed/GPE status bits before sleep, even
12230 Improved the AML debugger output for displaying the GPE blocks and their
12233 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
12237 Fixed a problem where the physical address was incorrectly calculated
12239 the Load() operator was used to directly load from an Operation Region
12241 loading from a Field object.) Also added check for minimum table length
12245 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
12248 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
12249 consistency with the other fields returned.
12251 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
12252 structure for each GPE in the system, so the size of this structure is
12255 CPU stack requirement reduction: Cleaned up the method execution and
12257 evaluation paths so that now a parameter structure is passed, instead of
12258 copying the various method parameters over and over again.
12260 In evregion.c: Correctly exit and reenter the interpreter region if and
12261 only if dispatching an operation region request to a user-installed
12263 Do not exit/reenter when dispatching to a default handler (e.g., default
12264 system memory or I/O handlers)
12267 Notes for updating drivers for the new GPE support. The following
12269 must be made to ACPI-related device drivers that are attached to one or
12271 GPEs: (This information will be added to the ACPI CA Programmer
12274 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
12276 explicitly call AcpiEnableGpe.
12277 2) There is a new interface called AcpiSetGpeType. This should be called
12278 before enabling the GPE. Also, this interface will automatically disable
12279 the GPE if it is currently enabled.
12280 3) AcpiEnableGpe no longer supports a GPE type flag.
12282 Specific drivers that must be changed:
12284 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
12285 AeGpeHandler, NULL);
12286 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
12287 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
12289 2) Button Drivers (Power, Lid, Sleep):
12290 Run _PRW method under parent device
12291 If _PRW exists: /* This is a control-method button */
12292 Extract GPE number and possibly GpeDevice
12293 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
12294 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
12296 For all other devices that have _PRWs, we automatically set the GPE type
12298 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
12300 must be done on a selective basis, usually requiring some kind of user
12302 to allow the user to pick the wake devices.
12305 Code and Data Size: Current and previous core subsystem library sizes are
12306 shown below. These are the code and data sizes for the acpica.lib
12308 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12309 any ACPI driver or OSPM code. The debug version of the code includes the
12310 debug output trace mechanism and has a much larger code and data size.
12312 that these values will vary depending on the efficiency of the compiler
12314 the compiler options used during generation.
12317 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
12318 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
12321 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
12322 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
12326 ----------------------------------------
12327 02 April 2004. Summary of changes for version 20040402:
12329 1) ACPI CA Core Subsystem:
12331 Fixed an interpreter problem where an indirect store through an ArgX
12332 parameter was incorrectly applying the "implicit conversion rules" during
12333 the store. From the ACPI specification: "If the target is a method local
12335 argument (LocalX or ArgX), no conversion is performed and the result is
12336 stored directly to the target". The new behavior is to disable implicit
12337 conversion during ALL stores to an ArgX.
12339 Changed the behavior of the _PRW method scan to ignore any and all errors
12340 returned by a given _PRW. This prevents the scan from aborting from the
12341 failure of any single _PRW.
12343 Moved the runtime configuration parameters from the global init procedure
12345 static variables in acglobal.h. This will allow the host to override the
12346 default values easily.
12348 Code and Data Size: Current and previous core subsystem library sizes are
12349 shown below. These are the code and data sizes for the acpica.lib
12351 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12352 any ACPI driver or OSPM code. The debug version of the code includes the
12353 debug output trace mechanism and has a much larger code and data size.
12355 that these values will vary depending on the efficiency of the compiler
12357 the compiler options used during generation.
12360 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
12361 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
12363 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
12364 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
12367 2) iASL Compiler/Disassembler:
12369 iASL now fully disassembles SSDTs. However, External() statements are
12371 generated automatically for unresolved symbols at this time. This is a
12372 planned feature for future implementation.
12374 Fixed a scoping problem in the disassembler that occurs when the type of
12376 target of a Scope() operator is overridden. This problem caused an
12377 incorrectly nested internal namespace to be constructed.
12379 Any warnings or errors that are emitted during disassembly are now
12381 out automatically so that the resulting file can be recompiled without
12385 ----------------------------------------
12386 26 March 2004. Summary of changes for version 20040326:
12388 1) ACPI CA Core Subsystem:
12390 Implemented support for "wake" GPEs via interaction between GPEs and the
12391 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
12392 identified as a WAKE GPE and by default will no longer be enabled at
12393 runtime. Previously, we were blindly enabling all GPEs with a
12395 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
12397 believe this has been the cause of thousands of "spurious" GPEs on some
12400 This new GPE behavior is can be reverted to the original behavior (enable
12401 ALL GPEs at runtime) via a runtime flag.
12403 Fixed a problem where aliased control methods could not access objects
12404 properly. The proper scope within the namespace was not initialized
12405 (transferred to the target of the aliased method) before executing the
12408 Fixed a potential race condition on internal object deletion on the
12410 object in AcpiEvaluateObject.
12412 Integrated a fix for resource descriptors where both _MEM and _MTP were
12413 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
12414 wide, 0x0F instead of 0x03.)
12416 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
12419 fault in some cases.
12421 Updated Notify() values for debug statements in evmisc.c
12423 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
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.
12438 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
12439 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
12441 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
12442 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
12444 ----------------------------------------
12445 11 March 2004. Summary of changes for version 20040311:
12447 1) ACPI CA Core Subsystem:
12449 Fixed a problem where errors occurring during the parse phase of control
12450 method execution did not abort cleanly. For example, objects created and
12451 installed in the namespace were not deleted. This caused all subsequent
12452 invocations of the method to return the AE_ALREADY_EXISTS exception.
12454 Implemented a mechanism to force a control method to "Serialized"
12456 if the method attempts to create namespace objects. (The root of the
12457 AE_ALREADY_EXISTS problem.)
12459 Implemented support for the predefined _OSI "internal" control method.
12460 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
12462 "Windows 2001.1", and can be easily upgraded for new strings as
12464 This feature will allow "other" operating systems to execute the fully
12465 tested, "Windows" code path through the ASL code
12467 Global Lock Support: Now allows multiple acquires and releases with any
12468 internal thread. Removed concept of "owning thread" for this special
12471 Fixed two functions that were inappropriately declaring large objects on
12473 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
12475 method execution considerably.
12477 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
12478 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
12480 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
12481 defined on the machine.
12483 Implemented two runtime options: One to force all control method
12485 to "Serialized" to mimic Windows behavior, another to disable _OSI
12487 if it causes problems on a given machine.
12489 Code and Data Size: Current and previous core subsystem library sizes are
12490 shown below. These are the code and data sizes for the acpica.lib
12492 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12493 any ACPI driver or OSPM code. The debug version of the code includes the
12494 debug output trace mechanism and has a much larger code and data size.
12496 that these values will vary depending on the efficiency of the compiler
12498 the compiler options used during generation.
12501 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
12502 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
12504 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
12505 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
12507 2) iASL Compiler/Disassembler:
12509 Fixed an array size problem for FreeBSD that would cause the compiler to
12512 ----------------------------------------
12513 20 February 2004. Summary of changes for version 20040220:
12516 1) ACPI CA Core Subsystem:
12518 Implemented execution of _SxD methods for Device objects in the
12519 GetObjectInfo interface.
12521 Fixed calls to _SST method to pass the correct arguments.
12523 Added a call to _SST on wake to restore to "working" state.
12525 Check for End-Of-Buffer failure case in the WalkResources interface.
12527 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
12528 structures to the beginning of the file.
12530 After wake, clear GPE status register(s) before enabling GPEs.
12532 After wake, clear/enable power button. (Perhaps we should clear/enable
12534 fixed events upon wake.)
12536 Fixed a couple of possible memory leaks in the Namespace manager.
12538 Integrated latest acnetbsd.h file.
12540 ----------------------------------------
12541 11 February 2004. Summary of changes for version 20040211:
12544 1) ACPI CA Core Subsystem:
12546 Completed investigation and implementation of the call-by-reference
12547 mechanism for control method arguments.
12549 Fixed a problem where a store of an object into an indexed package could
12550 fail if the store occurs within a different method than the method that
12551 created the package.
12553 Fixed a problem where the ToDecimal operator could return incorrect
12556 Fixed a problem where the CopyObject operator could fail on some of the
12558 obscure objects (e.g., Reference objects.)
12560 Improved the output of the Debug object to display buffer, package, and
12563 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
12565 the expected result.
12567 Added permanent ACPI_REPORT_ERROR macros for all instances of the
12568 ACPI_AML_INTERNAL exception.
12570 Integrated latest version of acfreebsd.h
12572 ----------------------------------------
12573 16 January 2004. Summary of changes for version 20040116:
12575 The purpose of this release is primarily to update the copyright years in
12576 each module, thus causing a huge number of diffs. There are a few small
12577 functional changes, however.
12579 1) ACPI CA Core Subsystem:
12581 Improved error messages when there is a problem finding one or more of
12583 required base ACPI tables
12585 Reintroduced the definition of APIC_HEADER in actbl.h
12587 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
12589 Removed extraneous reference to NewObj in dsmthdat.c
12593 Fixed a problem introduced in December that disabled the correct
12595 of Resource Templates
12598 ----------------------------------------
12599 03 December 2003. Summary of changes for version 20031203:
12601 1) ACPI CA Core Subsystem:
12603 Changed the initialization of Operation Regions during subsystem
12604 init to perform two entire walks of the ACPI namespace; The first
12605 to initialize the regions themselves, the second to execute the
12606 _REG methods. This fixed some interdependencies across _REG
12607 methods found on some machines.
12609 Fixed a problem where a Store(Local0, Local1) could simply update
12610 the object reference count, and not create a new copy of the
12611 object if the Local1 is uninitialized.
12613 Implemented support for the _SST reserved method during sleep
12616 Implemented support to clear the SLP_TYP and SLP_EN bits when
12617 waking up, this is apparently required by some machines.
12619 When sleeping, clear the wake status only if SleepState is not S5.
12621 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
12622 pointer arithmetic advanced a string pointer too far.
12624 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
12625 could be returned if the requested table has not been loaded.
12627 Within the support for IRQ resources, restructured the handling of
12628 the active and edge/level bits.
12630 Fixed a few problems in AcpiPsxExecute() where memory could be
12631 leaked under certain error conditions.
12633 Improved error messages for the cases where the ACPI mode could
12636 Code and Data Size: Current and previous core subsystem library
12637 sizes are shown below. These are the code and data sizes for the
12638 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
12639 these values do not include any ACPI driver or OSPM code. The
12640 debug version of the code includes the debug output trace
12641 mechanism and has a much larger code and data size. Note that
12642 these values will vary depending on the efficiency of the compiler
12643 and the compiler options used during generation.
12645 Previous Release (20031029):
12646 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
12647 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
12649 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
12650 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
12652 2) iASL Compiler/Disassembler:
12654 Implemented a fix for the iASL disassembler where a bad index was
12655 generated. This was most noticeable on 64-bit platforms
12658 ----------------------------------------
12659 29 October 2003. Summary of changes for version 20031029:
12661 1) ACPI CA Core Subsystem:
12664 Fixed a problem where a level-triggered GPE with an associated
12665 _Lxx control method was incorrectly cleared twice.
12667 Fixed a problem with the Field support code where an access can
12668 occur beyond the end-of-region if the field is non-aligned but
12669 extends to the very end of the parent region (resulted in an
12670 AE_AML_REGION_LIMIT exception.)
12672 Fixed a problem with ACPI Fixed Events where an RT Clock handler
12673 would not get invoked on an RTC event. The RTC event bitmasks for
12674 the PM1 registers were not being initialized properly.
12676 Implemented support for executing _STA and _INI methods for
12677 Processor objects. Although this is currently not part of the
12678 ACPI specification, there is existing ASL code that depends on the
12679 init-time execution of these methods.
12681 Implemented and deployed a GetDescriptorName function to decode
12682 the various types of internal descriptors. Guards against null
12683 descriptors during debug output also.
12685 Implemented and deployed a GetNodeName function to extract the 4-
12686 character namespace node name. This function simplifies the debug
12687 and error output, as well as guarding against null pointers during
12690 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
12691 simplify the debug and error output of 64-bit integers. This
12692 macro replaces the HIDWORD and LODWORD macros for dumping these
12695 Updated the implementation of the Stall() operator to only call
12696 AcpiOsStall(), and also return an error if the operand is larger
12697 than 255. This preserves the required behavior of not
12698 relinquishing the processor, as would happen if AcpiOsSleep() was
12699 called for "long stalls".
12701 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
12702 initialized are now treated as NOOPs.
12704 Cleaned up a handful of warnings during 64-bit generation.
12706 Fixed a reported error where and incorrect GPE number was passed
12707 to the GPE dispatch handler. This value is only used for error
12708 output, however. Used this opportunity to clean up and streamline
12709 the GPE dispatch code.
12711 Code and Data Size: Current and previous core subsystem library
12712 sizes are shown below. These are the code and data sizes for the
12713 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
12714 these values do not include any ACPI driver or OSPM code. The
12716 debug version of the code includes the debug output trace
12717 mechanism and has a much larger code and data size. Note that
12718 these values will vary depending on the efficiency of the compiler
12719 and the compiler options used during generation.
12721 Previous Release (20031002):
12722 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
12723 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
12725 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
12726 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
12729 2) iASL Compiler/Disassembler:
12731 Updated the iASL compiler to return an error if the operand to the
12732 Stall() operator is larger than 255.
12735 ----------------------------------------
12736 02 October 2003. Summary of changes for version 20031002:
12739 1) ACPI CA Core Subsystem:
12741 Fixed a problem with Index Fields where the index was not
12742 incremented for fields that require multiple writes to the
12743 index/data registers (Fields that are wider than the data
12746 Fixed a problem with all Field objects where a write could go
12747 beyond the end-of-field if the field was larger than the access
12748 granularity and therefore required multiple writes to complete the
12749 request. An extra write beyond the end of the field could happen
12752 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
12753 would incorrectly be returned if the width of the Data Register
12754 was larger than the specified field access width.
12756 Completed fixes for LoadTable() and Unload() and verified their
12757 operation. Implemented full support for the "DdbHandle" object
12758 throughout the ACPI CA subsystem.
12760 Implemented full support for the MADT and ECDT tables in the ACPI
12761 CA header files. Even though these tables are not directly
12762 consumed by ACPI CA, the header definitions are useful for ACPI
12765 Integrated resource descriptor fixes posted to the Linux ACPI
12766 list. This included checks for minimum descriptor length, and
12767 support for trailing NULL strings within descriptors that have
12768 optional string elements.
12770 Code and Data Size: Current and previous core subsystem library
12771 sizes are shown below. These are the code and data sizes for the
12772 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
12773 these values do not include any ACPI driver or OSPM code. The
12774 debug version of the code includes the debug output trace
12775 mechanism and has a much larger code and data size. Note that
12776 these values will vary depending on the efficiency of the compiler
12777 and the compiler options used during generation.
12779 Previous Release (20030918):
12780 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
12781 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
12783 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
12784 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
12789 Implemented detection of non-ASCII characters within the input
12790 source ASL file. This catches attempts to compile binary (AML)
12791 files early in the compile, with an informative error message.
12793 Fixed a problem where the disassembler would fault if the output
12794 filename could not be generated or if the output file could not be
12797 ----------------------------------------
12798 18 September 2003. Summary of changes for version 20030918:
12801 1) ACPI CA Core Subsystem:
12803 Found and fixed a longstanding problem with the late execution of
12804 the various deferred AML opcodes (such as Operation Regions,
12805 Buffer Fields, Buffers, and Packages). If the name string
12806 specified for the name of the new object placed the object in a
12807 scope other than the current scope, the initialization/execution
12808 of the opcode failed. The solution to this problem was to
12809 implement a mechanism where the late execution of such opcodes
12810 does not attempt to lookup/create the name a second time in an
12811 incorrect scope. This fixes the "region size computed
12812 incorrectly" problem.
12814 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
12815 Global Lock AE_BAD_PARAMETER error.
12817 Fixed several 64-bit issues with prototypes, casting and data
12820 Removed duplicate prototype from acdisasm.h
12822 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
12824 Code and Data Size: Current and previous core subsystem library
12825 sizes are shown below. These are the code and data sizes for the
12826 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
12827 these values do not include any ACPI driver or OSPM code. The
12828 debug version of the code includes the debug output trace
12829 mechanism and has a much larger code and data size. Note that
12830 these values will vary depending on the efficiency of the compiler
12831 and the compiler options used during generation.
12835 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
12836 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
12838 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
12839 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
12844 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
12845 correct sleep time in seconds.
12847 ----------------------------------------
12848 14 July 2003. Summary of changes for version 20030619:
12850 1) ACPI CA Core Subsystem:
12852 Parse SSDTs in order discovered, as opposed to reverse order
12855 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
12862 Dynamically allocate SDT list (suggested by Andi Kleen)
12864 proc function return value cleanups (Andi Kleen)
12866 Correctly handle NMI watchdog during long stalls (Andrew Morton)
12868 Make it so acpismp=force works (reported by Andrew Morton)
12871 ----------------------------------------
12872 19 June 2003. Summary of changes for version 20030619:
12874 1) ACPI CA Core Subsystem:
12876 Fix To/FromBCD, eliminating the need for an arch-specific #define.
12878 Do not acquire a semaphore in the S5 shutdown path.
12880 Fix ex_digits_needed for 0. (Takayoshi Kochi)
12882 Fix sleep/stall code reversal. (Andi Kleen)
12884 Revert a change having to do with control method calling
12889 acpiphp update (Takayoshi Kochi)
12891 Export acpi_disabled for sonypi (Stelian Pop)
12893 Mention acpismp=force in config help
12895 Re-add acpitable.c and acpismp=force. This improves backwards
12897 compatibility and also cleans up the code to a significant degree.
12899 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
12901 ----------------------------------------
12902 22 May 2003. Summary of changes for version 20030522:
12904 1) ACPI CA Core Subsystem:
12906 Found and fixed a reported problem where an AE_NOT_FOUND error
12907 occurred occasionally during _BST evaluation. This turned out to
12908 be an Owner ID allocation issue where a called method did not get
12909 a new ID assigned to it. Eventually, (after 64k calls), the Owner
12910 ID UINT16 would wraparound so that the ID would be the same as the
12911 caller's and the called method would delete the caller's
12914 Implemented extended error reporting for control methods that are
12915 aborted due to a run-time exception. Output includes the exact
12916 AML instruction that caused the method abort, a dump of the method
12917 locals and arguments at the time of the abort, and a trace of all
12918 nested control method calls.
12920 Modified the interpreter to allow the creation of buffers of zero
12921 length from the AML code. Implemented new code to ensure that no
12922 attempt is made to actually allocate a memory buffer (of length
12923 zero) - instead, a simple buffer object with a NULL buffer pointer
12924 and length zero is created. A warning is no longer issued when
12925 the AML attempts to create a zero-length buffer.
12927 Implemented a workaround for the "leading asterisk issue" in
12928 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
12929 asterisk is automatically removed if present in any HID, UID, or
12930 CID strings. The iASL compiler will still flag this asterisk as
12933 Implemented full support for _CID methods that return a package of
12934 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
12935 now additionally returns a device _CID list if present. This
12936 required a change to the external interface in order to pass an
12937 ACPI_BUFFER object as a parameter since the _CID list is of
12940 Fixed a problem with the new AE_SAME_HANDLER exception where
12941 handler initialization code did not know about this exception.
12943 Code and Data Size: Current and previous core subsystem library
12944 sizes are shown below. These are the code and data sizes for the
12945 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
12946 these values do not include any ACPI driver or OSPM code. The
12947 debug version of the code includes the debug output trace
12948 mechanism and has a much larger code and data size. Note that
12949 these values will vary depending on the efficiency of the compiler
12950 and the compiler options used during generation.
12952 Previous Release (20030509):
12953 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
12954 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
12956 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
12957 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
12962 Fixed a bug in which we would reinitialize the ACPI interrupt
12963 after it was already working, thus disabling all ACPI and the IRQs
12964 for any other device sharing the interrupt. (Thanks to Stian
12967 Toshiba driver update (John Belmonte)
12969 Return only 0 or 1 for our interrupt handler status (Andrew
12975 Fixed a reported problem where multiple (nested) ElseIf()
12976 statements were not handled correctly by the compiler, resulting
12977 in incorrect warnings and incorrect AML code. This was a problem
12978 in both the ASL parser and the code generator.
12983 Added changes to existing interfaces, new exception codes, and new
12984 text concerning reference count object management versus garbage
12987 ----------------------------------------
12988 09 May 2003. Summary of changes for version 20030509.
12991 1) ACPI CA Core Subsystem:
12993 Changed the subsystem initialization sequence to hold off
12994 installation of address space handlers until the hardware has been
12995 initialized and the system has entered ACPI mode. This is because
12996 the installation of space handlers can cause _REG methods to be
12997 run. Previously, the _REG methods could potentially be run before
12998 ACPI mode was enabled.
13000 Fixed some memory leak issues related to address space handler and
13001 notify handler installation. There were some problems with the
13002 reference count mechanism caused by the fact that the handler
13003 objects are shared across several namespace objects.
13005 Fixed a reported problem where reference counts within the
13006 namespace were not properly updated when named objects created by
13007 method execution were deleted.
13009 Fixed a reported problem where multiple SSDTs caused a deletion
13010 issue during subsystem termination. Restructured the table data
13011 structures to simplify the linked lists and the related code.
13013 Fixed a problem where the table ID associated with secondary
13014 tables (SSDTs) was not being propagated into the namespace objects
13015 created by those tables. This would only present a problem for
13016 tables that are unloaded at run-time, however.
13018 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
13019 type as the length parameter (instead of UINT32).
13021 Solved a long-standing problem where an ALREADY_EXISTS error
13022 appears on various systems. This problem could happen when there
13023 are multiple PCI_Config operation regions under a single PCI root
13024 bus. This doesn't happen very frequently, but there are some
13025 systems that do this in the ASL.
13027 Fixed a reported problem where the internal DeleteNode function
13028 was incorrectly handling the case where a namespace node was the
13029 first in the parent's child list, and had additional peers (not
13030 the only child, but first in the list of children.)
13032 Code and Data Size: Current core subsystem library sizes are shown
13033 below. These are the code and data sizes for the acpica.lib
13034 produced by the Microsoft Visual C++ 6.0 compiler, and these
13035 values do not include any ACPI driver or OSPM code. The debug
13036 version of the code includes the debug output trace mechanism and
13037 has a much larger code and data size. Note that these values will
13038 vary depending on the efficiency of the compiler and the compiler
13039 options used during generation.
13042 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
13043 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
13045 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
13046 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
13051 Allow ":" in OS override string (Ducrot Bruno)
13053 Kobject fix (Greg KH)
13056 3 iASL Compiler/Disassembler:
13058 Fixed a problem in the generation of the C source code files (AML
13059 is emitted in C source statements for BIOS inclusion) where the
13060 Ascii dump that appears within a C comment at the end of each line
13061 could cause a compile time error if the AML sequence happens to
13062 have an open comment or close comment sequence embedded.
13065 ----------------------------------------
13066 24 April 2003. Summary of changes for version 20030424.
13069 1) ACPI CA Core Subsystem:
13071 Support for big-endian systems has been implemented. Most of the
13072 support has been invisibly added behind big-endian versions of the
13073 ACPI_MOVE_* macros.
13075 Fixed a problem in AcpiHwDisableGpeBlock() and
13076 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
13077 low level hardware write routine. The offset parameter was
13078 actually eliminated from the low level read/write routines because
13079 they had become obsolete.
13081 Fixed a problem where a handler object was deleted twice during
13082 the removal of a fixed event handler.
13087 A fix for SMP systems with link devices was contributed by
13091 (2.5) Return whether we handled the interrupt in our IRQ handler.
13092 (Linux ISRs no longer return void, so we can propagate the handler
13093 return value from the ACPI CA core back to the OS.)
13099 The ACPI CA Programmer Reference has been updated to reflect new
13100 interfaces and changes to existing interfaces.
13102 ----------------------------------------
13103 28 March 2003. Summary of changes for version 20030328.
13105 1) ACPI CA Core Subsystem:
13107 The GPE Block Device support has been completed. New interfaces
13108 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
13109 interfaces (enable, disable, clear, getstatus) have been split
13110 into separate interfaces for Fixed Events and General Purpose
13111 Events (GPEs) in order to support GPE Block Devices properly.
13113 Fixed a problem where the error message "Failed to acquire
13114 semaphore" would appear during operations on the embedded
13117 Code and Data Size: Current core subsystem library sizes are shown
13118 below. These are the code and data sizes for the acpica.lib
13119 produced by the Microsoft Visual C++ 6.0 compiler, and these
13120 values do not include any ACPI driver or OSPM code. The debug
13121 version of the code includes the debug output trace mechanism and
13122 has a much larger code and data size. Note that these values will
13123 vary depending on the efficiency of the compiler and the compiler
13124 options used during generation.
13127 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
13128 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
13130 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
13131 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
13134 ----------------------------------------
13135 28 February 2003. Summary of changes for version 20030228.
13138 1) ACPI CA Core Subsystem:
13140 The GPE handling and dispatch code has been completely overhauled
13141 in preparation for support of GPE Block Devices (ID ACPI0006).
13142 This affects internal data structures and code only; there should
13143 be no differences visible externally. One new file has been
13146 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
13147 fields that are used to determine the GPE block lengths. The
13148 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
13149 structures are ignored. This is per the ACPI specification but it
13150 isn't very clear. The full 256 Block 0/1 GPEs are now supported
13151 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
13153 In the SCI interrupt handler, removed the read of the PM1_CONTROL
13154 register to look at the SCI_EN bit. On some machines, this read
13155 causes an SMI event and greatly slows down SCI events. (This may
13156 in fact be the cause of slow battery status response on some
13159 Fixed a problem where a store of a NULL string to a package object
13160 could cause the premature deletion of the object. This was seen
13161 during execution of the battery _BIF method on some systems,
13162 resulting in no battery data being returned.
13164 Added AcpiWalkResources interface to simplify parsing of resource
13167 Code and Data Size: Current core subsystem library sizes are shown
13168 below. These are the code and data sizes for the acpica.lib
13169 produced by the Microsoft Visual C++ 6.0 compiler, and these
13170 values do not include any ACPI driver or OSPM code. The debug
13171 version of the code includes the debug output trace mechanism and
13172 has a much larger code and data size. Note that these values will
13173 vary depending on the efficiency of the compiler and the compiler
13174 options used during generation.
13177 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
13178 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
13180 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
13181 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
13186 S3 fixes (Ole Rohne)
13188 Update ACPI PHP driver with to use new acpi_walk_resource API
13191 Add S4BIOS support (Pavel Machek)
13193 Map in entire table before performing checksum (John Stultz)
13195 Expand the mem= cmdline to allow the specification of reserved and
13196 ACPI DATA blocks (Pavel Machek)
13198 Never use ACPI on VISWS
13200 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
13202 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
13203 causing us to think that some systems support C2 when they really
13206 Do not count processor objects for non-present CPUs (Thanks to
13212 Fixed a problem where ASL include files could not be found and
13215 Added support for the _PDC reserved name.
13218 ----------------------------------------
13219 22 January 2003. Summary of changes for version 20030122.
13222 1) ACPI CA Core Subsystem:
13224 Added a check for constructs of the form: Store (Local0, Local0)
13225 where Local0 is not initialized. Apparently, some BIOS
13226 programmers believe that this is a NOOP. Since this store doesn't
13227 do anything anyway, the new prototype behavior will ignore this
13228 error. This is a case where we can relax the strict checking in
13229 the interpreter in the name of compatibility.
13234 The AcpiSrc Source Conversion Utility has been released with the
13235 Linux package for the first time. This is the utility that is
13236 used to convert the ACPI CA base source code to the Linux version.
13238 (Both) Handle P_BLK lengths shorter than 6 more gracefully
13240 (Both) Move more headers to include/acpi, and delete an unused
13243 (Both) Move drivers/acpi/include directory to include/acpi
13245 (Both) Boot functions don't use cmdline, so don't pass it around
13247 (Both) Remove include of unused header (Adrian Bunk)
13249 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
13251 former now also includes the latter, acpiphp.h only needs the one,
13254 (2.5) Make it possible to select method of bios restoring after S3
13255 resume. [=> no more ugly ifdefs] (Pavel Machek)
13257 (2.5) Make proc write interfaces work (Pavel Machek)
13259 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
13261 (2.5) Break out ACPI Perf code into its own module, under cpufreq
13262 (Dominik Brodowski)
13264 (2.4) S4BIOS support (Ducrot Bruno)
13266 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
13272 Added support to disassemble SSDT and PSDTs.
13274 Implemented support to obtain SSDTs from the Windows registry if
13278 ----------------------------------------
13279 09 January 2003. Summary of changes for version 20030109.
13281 1) ACPI CA Core Subsystem:
13283 Changed the behavior of the internal Buffer-to-String conversion
13284 function. The current ACPI specification states that the contents
13285 of the buffer are "converted to a string of two-character
13286 hexadecimal numbers, each separated by a space". Unfortunately,
13287 this definition is not backwards compatible with existing ACPI 1.0
13288 implementations (although the behavior was not defined in the ACPI
13289 1.0 specification). The new behavior simply copies data from the
13290 buffer to the string until a null character is found or the end of
13291 the buffer is reached. The new String object is always null
13292 terminated. This problem was seen during the generation of _BIF
13293 battery data where incorrect strings were returned for battery
13294 type, etc. This will also require an errata to the ACPI
13297 Renamed all instances of NATIVE_UINT and NATIVE_INT to
13298 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
13300 Copyright in all module headers (both Linux and non-Linux) has be
13303 Code and Data Size: Current core subsystem library sizes are shown
13304 below. These are the code and data sizes for the acpica.lib
13305 produced by the Microsoft Visual C++ 6.0 compiler, and these
13306 values do not include any ACPI driver or OSPM code. The debug
13307 version of the code includes the debug output trace mechanism and
13308 has a much larger code and data size. Note that these values will
13309 vary depending on the efficiency of the compiler and the compiler
13310 options used during generation.
13313 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
13314 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
13316 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
13317 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
13322 Fixed an oops on module insertion/removal (Matthew Tippett)
13324 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
13326 (2.5) Replace pr_debug (Randy Dunlap)
13328 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
13330 (Both) Eliminate spawning of thread from timer callback, in favor
13333 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
13335 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
13337 (Both) Add missing statics to button.c (Pavel Machek)
13339 Several changes have been made to the source code translation
13340 utility that generates the Linux Code in order to make the code
13343 All typedefs on structs and unions have been removed in keeping
13344 with the Linux coding style.
13346 Removed the non-Linux SourceSafe module revision number from each
13349 Completed major overhaul of symbols to be lowercased for linux.
13350 Doubled the number of symbols that are lowercased.
13352 Fixed a problem where identifiers within procedure headers and
13353 within quotes were not fully lower cased (they were left with a
13356 Some C macros whose only purpose is to allow the generation of 16-
13357 bit code are now completely removed in the Linux code, increasing
13358 readability and maintainability.
13360 ----------------------------------------
13362 12 December 2002. Summary of changes for version 20021212.
13365 1) ACPI CA Core Subsystem:
13367 Fixed a problem where the creation of a zero-length AML Buffer
13368 would cause a fault.
13370 Fixed a problem where a Buffer object that pointed to a static AML
13371 buffer (in an ACPI table) could inadvertently be deleted, causing
13374 Fixed a problem where a user buffer (passed in to the external
13375 ACPI CA interfaces) could be overwritten if the buffer was too
13376 small to complete the operation, causing memory corruption.
13378 Fixed a problem in the Buffer-to-String conversion code where a
13379 string of length one was always returned, regardless of the size
13380 of the input Buffer object.
13382 Removed the NATIVE_CHAR data type across the entire source due to
13383 lack of need and lack of consistent use.
13385 Code and Data Size: Current core subsystem library sizes are shown
13386 below. These are the code and data sizes for the acpica.lib
13387 produced by the Microsoft Visual C++ 6.0 compiler, and these
13388 values do not include any ACPI driver or OSPM code. The debug
13389 version of the code includes the debug output trace mechanism and
13390 has a much larger code and data size. Note that these values will
13391 vary depending on the efficiency of the compiler and the compiler
13392 options used during generation.
13395 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
13396 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
13398 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
13399 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
13402 ----------------------------------------
13403 05 December 2002. Summary of changes for version 20021205.
13405 1) ACPI CA Core Subsystem:
13407 Fixed a problem where a store to a String or Buffer object could
13408 cause corruption of the DSDT if the object type being stored was
13409 the same as the target object type and the length of the object
13410 being stored was equal to or smaller than the original (existing)
13411 target object. This was seen to cause corruption of battery _BIF
13412 buffers if the _BIF method modified the buffer on the fly.
13414 Fixed a problem where an internal error was generated if a control
13415 method invocation was used in an OperationRegion, Buffer, or
13416 Package declaration. This was caused by the deferred parsing of
13417 the control method and thus the deferred creation of the internal
13418 method object. The solution to this problem was to create the
13419 internal method object at the moment the method is encountered in
13420 the first pass - so that subsequent references to the method will
13421 able to obtain the required parameter count and thus properly
13422 parse the method invocation. This problem presented itself as an
13423 AE_AML_INTERNAL during the pass 1 parse phase during table load.
13425 Fixed a problem where the internal String object copy routine did
13426 not always allocate sufficient memory for the target String object
13427 and caused memory corruption. This problem was seen to cause
13428 "Allocation already present in list!" errors as memory allocation
13431 Implemented a new function for the evaluation of namespace objects
13432 that allows the specification of the allowable return object
13433 types. This simplifies a lot of code that checks for a return
13434 object of one or more specific objects returned from the
13435 evaluation (such as _STA, etc.) This may become and external
13436 function if it would be useful to ACPI-related drivers.
13438 Completed another round of prefixing #defines with "ACPI_" for
13441 Completed additional code restructuring to allow more modular
13442 linking for iASL compiler and AcpiExec. Several files were split
13443 creating new files. New files: nsparse.c dsinit.c evgpe.c
13445 Implemented an abort mechanism to terminate an executing control
13446 method via the AML debugger. This feature is useful for debugging
13447 control methods that depend (wait) for specific hardware
13450 Code and Data Size: Current core subsystem library sizes are shown
13451 below. These are the code and data sizes for the acpica.lib
13452 produced by the Microsoft Visual C++ 6.0 compiler, and these
13453 values do not include any ACPI driver or OSPM code. The debug
13454 version of the code includes the debug output trace mechanism and
13455 has a much larger code and data size. Note that these values will
13456 vary depending on the efficiency of the compiler and the compiler
13457 options used during generation.
13460 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
13461 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
13463 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
13464 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
13467 2) iASL Compiler/Disassembler
13469 Fixed a compiler code generation problem for "Interrupt" Resource
13470 Descriptors. If specified in the ASL, the optional "Resource
13471 Source Index" and "Resource Source" fields were not inserted into
13472 the correct location within the AML resource descriptor, creating
13473 an invalid descriptor.
13475 Fixed a disassembler problem for "Interrupt" resource descriptors.
13476 The optional "Resource Source Index" and "Resource Source" fields
13480 ----------------------------------------
13481 22 November 2002. Summary of changes for version 20021122.
13484 1) ACPI CA Core Subsystem:
13486 Fixed a reported problem where an object stored to a Method Local
13487 or Arg was not copied to a new object during the store - the
13488 object pointer was simply copied to the Local/Arg. This caused
13489 all subsequent operations on the Local/Arg to also affect the
13490 original source of the store operation.
13492 Fixed a problem where a store operation to a Method Local or Arg
13493 was not completed properly if the Local/Arg contained a reference
13494 (from RefOf) to a named field. The general-purpose store-to-
13495 namespace-node code is now used so that this case is handled
13498 Fixed a problem where the internal object copy routine would cause
13499 a protection fault if the object being copied was a Package and
13500 contained either 1) a NULL package element or 2) a nested sub-
13503 Fixed a problem with the GPE initialization that resulted from an
13504 ambiguity in the ACPI specification. One section of the
13505 specification states that both the address and length of the GPE
13506 block must be zero if the block is not supported. Another section
13507 implies that only the address need be zero if the block is not
13508 supported. The code has been changed so that both the address and
13509 the length must be non-zero to indicate a valid GPE block (i.e.,
13510 if either the address or the length is zero, the GPE block is
13513 Code and Data Size: Current core subsystem library sizes are shown
13514 below. These are the code and data sizes for the acpica.lib
13515 produced by the Microsoft Visual C++ 6.0 compiler, and these
13516 values do not include any ACPI driver or OSPM code. The debug
13517 version of the code includes the debug output trace mechanism and
13518 has a much larger code and data size. Note that these values will
13519 vary depending on the efficiency of the compiler and the compiler
13520 options used during generation.
13523 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
13524 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
13526 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
13527 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
13532 Cleaned up EC driver. Exported an external EC read/write
13533 interface. By going through this, other drivers (most notably
13534 sonypi) will be able to serialize access to the EC.
13537 3) iASL Compiler/Disassembler
13539 Implemented support to optionally generate include files for both
13540 ASM and C (the -i switch). This simplifies BIOS development by
13541 automatically creating include files that contain external
13542 declarations for the symbols that are created within the
13544 (optionally generated) ASM and C AML source files.
13547 ----------------------------------------
13548 15 November 2002. Summary of changes for version 20021115.
13550 1) ACPI CA Core Subsystem:
13552 Fixed a memory leak problem where an error during resolution of
13554 method arguments during a method invocation from another method
13555 failed to cleanup properly by deleting all successfully resolved
13558 Fixed a problem where the target of the Index() operator was not
13559 correctly constructed if the source object was a package. This
13560 problem has not been detected because the use of a target operand
13561 with Index() is very rare.
13563 Fixed a problem with the Index() operator where an attempt was
13564 made to delete the operand objects twice.
13566 Fixed a problem where an attempt was made to delete an operand
13567 twice during execution of the CondRefOf() operator if the target
13570 Implemented the first of perhaps several internal create object
13571 functions that create and initialize a specific object type. This
13572 consolidates duplicated code wherever the object is created, thus
13573 shrinking the size of the subsystem.
13575 Implemented improved debug/error messages for errors that occur
13576 during nested method invocations. All executing method pathnames
13577 are displayed (with the error) as the call stack is unwound - thus
13580 Fixed a problem introduced in the 10/02 release that caused
13581 premature deletion of a buffer object if a buffer was used as an
13582 ASL operand where an integer operand is required (Thus causing an
13583 implicit object conversion from Buffer to Integer.) The change in
13584 the 10/02 release was attempting to fix a memory leak (albeit
13587 Code and Data Size: Current core subsystem library sizes are shown
13588 below. These are the code and data sizes for the acpica.lib
13589 produced by the Microsoft Visual C++ 6.0 compiler, and these
13590 values do not include any ACPI driver or OSPM code. The debug
13591 version of the code includes the debug output trace mechanism and
13592 has a much larger code and data size. Note that these values will
13593 vary depending on the efficiency of the compiler and the compiler
13594 options used during generation.
13597 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
13598 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
13600 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
13601 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
13606 Changed the implementation of the ACPI semaphores to use down()
13607 instead of down_interruptable(). It is important that the
13608 execution of ACPI control methods not be interrupted by signals.
13609 Methods must run to completion, or the system may be left in an
13610 unknown/unstable state.
13612 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
13616 3) iASL Compiler/Disassembler
13619 Changed the default location of output files. All output files
13620 are now placed in the current directory by default instead of in
13621 the directory of the source file. This change may affect some
13622 existing makefiles, but it brings the behavior of the compiler in
13623 line with other similar tools. The location of the output files
13624 can be overridden with the -p command line switch.
13627 ----------------------------------------
13628 11 November 2002. Summary of changes for version 20021111.
13631 0) ACPI Specification 2.0B is released and is now available at:
13632 http://www.acpi.info/index.html
13635 1) ACPI CA Core Subsystem:
13637 Implemented support for the ACPI 2.0 SMBus Operation Regions.
13638 This includes the early detection and handoff of the request to
13639 the SMBus region handler (avoiding all of the complex field
13640 support code), and support for the bidirectional return packet
13641 from an SMBus write operation. This paves the way for the
13642 development of SMBus drivers in each host operating system.
13644 Fixed a problem where the semaphore WAIT_FOREVER constant was
13645 defined as 32 bits, but must be 16 bits according to the ACPI
13646 specification. This had the side effect of causing ASL
13647 Mutex/Event timeouts even though the ASL code requested a wait
13648 forever. Changed all internal references to the ACPI timeout
13649 parameter to 16 bits to prevent future problems. Changed the name
13650 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
13652 Code and Data Size: Current core subsystem library sizes are shown
13653 below. These are the code and data sizes for the acpica.lib
13654 produced by the Microsoft Visual C++ 6.0 compiler, and these
13655 values do not include any ACPI driver or OSPM code. The debug
13656 version of the code includes the debug output trace mechanism and
13657 has a much larger code and data size. Note that these values will
13658 vary depending on the efficiency of the compiler and the compiler
13659 options used during generation.
13662 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
13663 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
13665 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
13666 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
13671 Module loading/unloading fixes (John Cagle)
13674 3) iASL Compiler/Disassembler
13676 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
13678 Implemented support for the disassembly of all SMBus protocol
13679 keywords (SMBQuick, SMBWord, etc.)
13681 ----------------------------------------
13682 01 November 2002. Summary of changes for version 20021101.
13685 1) ACPI CA Core Subsystem:
13687 Fixed a problem where platforms that have a GPE1 block but no GPE0
13688 block were not handled correctly. This resulted in a "GPE
13689 overlap" error message. GPE0 is no longer required.
13691 Removed code added in the previous release that inserted nodes
13692 into the namespace in alphabetical order. This caused some side-
13693 effects on various machines. The root cause of the problem is
13694 still under investigation since in theory, the internal ordering
13695 of the namespace nodes should not matter.
13698 Enhanced error reporting for the case where a named object is not
13699 found during control method execution. The full ACPI namepath
13700 (name reference) of the object that was not found is displayed in
13703 Note: as a result of the overhaul of the namespace object types in
13704 the previous release, the namespace nodes for the predefined
13705 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
13706 instead of ACPI_TYPE_ANY. This simplifies the namespace
13707 management code but may affect code that walks the namespace tree
13708 looking for specific object types.
13710 Code and Data Size: Current core subsystem library sizes are shown
13711 below. These are the code and data sizes for the acpica.lib
13712 produced by the Microsoft Visual C++ 6.0 compiler, and these
13713 values do not include any ACPI driver or OSPM code. The debug
13714 version of the code includes the debug output trace mechanism and
13715 has a much larger code and data size. Note that these values will
13716 vary depending on the efficiency of the compiler and the compiler
13717 options used during generation.
13720 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
13721 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
13723 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
13724 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
13729 Fixed a problem introduced in the previous release where the
13730 Processor and Thermal objects were not recognized and installed in
13731 /proc. This was related to the scope type change described above.
13734 3) iASL Compiler/Disassembler
13736 Implemented the -g option to get all of the required ACPI tables
13737 from the registry and save them to files (Windows version of the
13738 compiler only.) The required tables are the FADT, FACS, and DSDT.
13740 Added ACPI table checksum validation during table disassembly in
13741 order to catch corrupted tables.
13744 ----------------------------------------
13745 22 October 2002. Summary of changes for version 20021022.
13747 1) ACPI CA Core Subsystem:
13749 Implemented a restriction on the Scope operator that the target
13750 must already exist in the namespace at the time the operator is
13751 encountered (during table load or method execution). In other
13752 words, forward references are not allowed and Scope() cannot
13753 create a new object. This changes the previous behavior where the
13754 interpreter would create the name if not found. This new behavior
13755 correctly enables the search-to-root algorithm during namespace
13756 lookup of the target name. Because of this upsearch, this fixes
13757 the known Compaq _SB_.OKEC problem and makes both the AML
13758 interpreter and iASL compiler compatible with other ACPI
13761 Completed a major overhaul of the internal ACPI object types for
13762 the ACPI Namespace and the associated operand objects. Many of
13763 these types had become obsolete with the introduction of the two-
13764 pass namespace load. This cleanup simplifies the code and makes
13765 the entire namespace load mechanism much clearer and easier to
13768 Improved debug output for tracking scope opening/closing to help
13769 diagnose scoping issues. The old scope name as well as the new
13770 scope name are displayed. Also improved error messages for
13771 problems with ASL Mutex objects and error messages for GPE
13774 Cleaned up the namespace dump code, removed obsolete code.
13776 All string output (for all namespace/object dumps) now uses the
13777 common ACPI string output procedure which handles escapes properly
13778 and does not emit non-printable characters.
13780 Fixed some issues with constants in the 64-bit version of the
13781 local C library (utclib.c)
13786 EC Driver: No longer attempts to acquire the Global Lock at
13790 3) iASL Compiler/Disassembler
13792 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
13793 2 opcodes outside of a control method. This means that the
13794 "executable" operators (versus the "namespace" operators) cannot
13795 be used at the table level; they can only be used within a control
13798 Implemented the restriction on the Scope() operator where the
13799 target must already exist in the namespace at the time the
13800 operator is encountered (during ASL compilation). In other words,
13801 forward references are not allowed and Scope() cannot create a new
13802 object. This makes the iASL compiler compatible with other ACPI
13803 implementations and makes the Scope() implementation adhere to the
13804 ACPI specification.
13806 Fixed a problem where namepath optimization for the Alias operator
13807 was optimizing the wrong path (of the two namepaths.) This caused
13808 a "Missing alias link" error message.
13810 Fixed a problem where an "unknown reserved name" warning could be
13811 incorrectly generated for names like "_SB" when the trailing
13812 underscore is not used in the original ASL.
13814 Fixed a problem where the reserved name check did not handle
13815 NamePaths with multiple NameSegs correctly. The first nameseg of
13816 the NamePath was examined instead of the last NameSeg.
13819 ----------------------------------------
13821 02 October 2002. Summary of changes for this release.
13824 1) ACPI CA Core Subsystem version 20021002:
13826 Fixed a problem where a store/copy of a string to an existing
13827 string did not always set the string length properly in the String
13830 Fixed a reported problem with the ToString operator where the
13831 behavior was identical to the ToHexString operator instead of just
13832 simply converting a raw buffer to a string data type.
13834 Fixed a problem where CopyObject and the other "explicit"
13835 conversion operators were not updating the internal namespace node
13836 type as part of the store operation.
13838 Fixed a memory leak during implicit source operand conversion
13839 where the original object was not deleted if it was converted to a
13840 new object of a different type.
13842 Enhanced error messages for all problems associated with namespace
13843 lookups. Common procedure generates and prints the lookup name as
13844 well as the formatted status.
13846 Completed implementation of a new design for the Alias support
13847 within the namespace. The existing design did not handle the case
13848 where a new object was assigned to one of the two names due to the
13849 use of an explicit conversion operator, resulting in the two names
13850 pointing to two different objects. The new design simply points
13851 the Alias name to the original name node - not to the object.
13852 This results in a level of indirection that must be handled in the
13853 name resolution mechanism.
13855 Code and Data Size: Current core subsystem library sizes are shown
13856 below. These are the code and data sizes for the acpica.lib
13857 produced by the Microsoft Visual C++ 6.0 compiler, and these
13858 values do not include any ACPI driver or OSPM code. The debug
13859 version of the code includes the debug output trace mechanism and
13860 has a larger code and data size. Note that these values will vary
13861 depending on the efficiency of the compiler and the compiler
13862 options used during generation.
13865 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
13866 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
13868 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
13869 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
13874 Initialize thermal driver's timer before it is used. (Knut
13877 Allow handling negative celsius values. (Kochi Takayoshi)
13879 Fix thermal management and make trip points. R/W (Pavel Machek)
13881 Fix /proc/acpi/sleep. (P. Christeas)
13883 IA64 fixes. (David Mosberger)
13885 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
13887 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
13891 3) iASL Compiler/Disassembler
13893 Clarified some warning/error messages.
13896 ----------------------------------------
13897 18 September 2002. Summary of changes for this release.
13900 1) ACPI CA Core Subsystem version 20020918:
13902 Fixed a reported problem with reference chaining (via the Index()
13903 and RefOf() operators) in the ObjectType() and SizeOf() operators.
13904 The definition of these operators includes the dereferencing of
13905 all chained references to return information on the base object.
13907 Fixed a problem with stores to indexed package elements - the
13908 existing code would not complete the store if an "implicit
13909 conversion" was not performed. In other words, if the existing
13910 object (package element) was to be replaced completely, the code
13911 didn't handle this case.
13913 Relaxed typechecking on the ASL "Scope" operator to allow the
13914 target name to refer to an object of type Integer, String, or
13915 Buffer, in addition to the scoping object types (Device,
13916 predefined Scopes, Processor, PowerResource, and ThermalZone.)
13917 This allows existing AML code that has workarounds for a bug in
13918 Windows to function properly. A warning is issued, however. This
13919 affects both the AML interpreter and the iASL compiler. Below is
13920 an example of this type of ASL code:
13926 Fixed some reported problems with 64-bit integer support in the
13927 local implementation of C library functions (clib.c)
13932 Use ACPI fix map region instead of IOAPIC region, since it is
13933 undefined in non-SMP.
13935 Ensure that the SCI has the proper polarity and trigger, even on
13936 systems that do not have an interrupt override entry in the MADT.
13938 2.5 big driver reorganization (Pat Mochel)
13940 Use early table mapping code from acpitable.c (Andi Kleen)
13942 New blacklist entries (Andi Kleen)
13944 Blacklist improvements. Split blacklist code out into a separate
13945 file. Move checking the blacklist to very early. Previously, we
13946 would use ACPI tables, and then halfway through init, check the
13947 blacklist -- too late. Now, it's early enough to completely fall-
13951 3) iASL Compiler/Disassembler version 20020918:
13953 Fixed a problem where the typechecking code didn't know that an
13954 alias could point to a method. In other words, aliases were not
13955 being dereferenced during typechecking.
13958 ----------------------------------------
13959 29 August 2002. Summary of changes for this release.
13961 1) ACPI CA Core Subsystem Version 20020829:
13963 If the target of a Scope() operator already exists, it must be an
13964 object type that actually opens a scope -- such as a Device,
13965 Method, Scope, etc. This is a fatal runtime error. Similar error
13966 check has been added to the iASL compiler also.
13968 Tightened up the namespace load to disallow multiple names in the
13969 same scope. This previously was allowed if both objects were of
13970 the same type. (i.e., a lookup was the same as entering a new
13976 Ensure that the ACPI interrupt has the proper trigger and
13979 local_irq_disable is extraneous. (Matthew Wilcox)
13981 Make "acpi=off" actually do what it says, and not use the ACPI
13982 interpreter *or* the tables.
13984 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
13988 3) iASL Compiler/Disassembler Version 20020829:
13990 Implemented namepath optimization for name declarations. For
13991 example, a declaration like "Method (\_SB_.ABCD)" would get
13992 optimized to "Method (ABCD)" if the declaration is within the
13993 \_SB_ scope. This optimization is in addition to the named
13994 reference path optimization first released in the previous
13995 version. This would seem to complete all possible optimizations
13996 for namepaths within the ASL/AML.
13998 If the target of a Scope() operator already exists, it must be an
13999 object type that actually opens a scope -- such as a Device,
14000 Method, Scope, etc.
14002 Implemented a check and warning for unreachable code in the same
14003 block below a Return() statement.
14005 Fixed a problem where the listing file was not generated if the
14006 compiler aborted if the maximum error count was exceeded (200).
14008 Fixed a problem where the typechecking of method return values was
14009 broken. This includes the check for a return value when the
14010 method is invoked as a TermArg (a return value is expected.)
14012 Fixed a reported problem where EOF conditions during a quoted
14013 string or comment caused a fault.
14016 ----------------------------------------
14017 15 August 2002. Summary of changes for this release.
14019 1) ACPI CA Core Subsystem Version 20020815:
14021 Fixed a reported problem where a Store to a method argument that
14022 contains a reference did not perform the indirect store correctly.
14023 This problem was created during the conversion to the new
14024 reference object model - the indirect store to a method argument
14025 code was not updated to reflect the new model.
14027 Reworked the ACPI mode change code to better conform to ACPI 2.0,
14028 handle corner cases, and improve code legibility (Kochi Takayoshi)
14030 Fixed a problem with the pathname parsing for the carat (^)
14031 prefix. The heavy use of the carat operator by the new namepath
14032 optimization in the iASL compiler uncovered a problem with the AML
14033 interpreter handling of this prefix. In the case where one or
14034 more carats precede a single nameseg, the nameseg was treated as
14035 standalone and the search rule (to root) was inadvertently
14036 applied. This could cause both the iASL compiler and the
14037 interpreter to find the wrong object or to miss the error that
14038 should occur if the object does not exist at that exact pathname.
14040 Found and fixed the problem where the HP Pavilion DSDT would not
14041 load. This was a relatively minor tweak to the table loading code
14042 (a problem caused by the unexpected encounter with a method
14043 invocation not within a control method), but it does not solve the
14044 overall issue of the execution of AML code at the table level.
14045 This investigation is still ongoing.
14047 Code and Data Size: Current core subsystem library sizes are shown
14048 below. These are the code and data sizes for the acpica.lib
14049 produced by the Microsoft Visual C++ 6.0 compiler, and these
14050 values do not include any ACPI driver or OSPM code. The debug
14051 version of the code includes the debug output trace mechanism and
14052 has a larger code and data size. Note that these values will vary
14053 depending on the efficiency of the compiler and the compiler
14054 options used during generation.
14057 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
14058 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
14060 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
14061 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
14066 Remove redundant slab.h include (Brad Hards)
14068 Fix several bugs in thermal.c (Herbert Nachtnebel)
14070 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
14072 Change acpi_system_suspend to use updated irq functions (Pavel
14075 Export acpi_get_firmware_table (Matthew Wilcox)
14077 Use proper root proc entry for ACPI (Kochi Takayoshi)
14079 Fix early-boot table parsing (Bjorn Helgaas)
14082 3) iASL Compiler/Disassembler
14084 Reworked the compiler options to make them more consistent and to
14085 use two-letter options where appropriate. We were running out of
14086 sensible letters. This may break some makefiles, so check the
14087 current options list by invoking the compiler with no parameters.
14089 Completed the design and implementation of the ASL namepath
14090 optimization option for the compiler. This option optimizes all
14091 references to named objects to the shortest possible path. The
14092 first attempt tries to utilize a single nameseg (4 characters) and
14093 the "search-to-root" algorithm used by the interpreter. If that
14094 cannot be used (because either the name is not in the search path
14095 or there is a conflict with another object with the same name),
14096 the pathname is optimized using the carat prefix (usually a
14097 shorter string than specifying the entire path from the root.)
14099 Implemented support to obtain the DSDT from the Windows registry
14100 (when the disassembly option is specified with no input file).
14101 Added this code as the implementation for AcpiOsTableOverride in
14102 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
14103 utility) to scan memory for the DSDT to the AcpiOsTableOverride
14104 function in the DOS OSL to make the disassembler truly OS
14107 Implemented a new option to disassemble and compile in one step.
14108 When used without an input filename, this option will grab the
14109 DSDT from the local machine, disassemble it, and compile it in one
14112 Added a warning message for invalid escapes (a backslash followed
14113 by any character other than the allowable escapes). This catches
14114 the quoted string error "\_SB_" (which should be "\\_SB_" ).
14116 Also, there are numerous instances in the ACPI specification where
14119 Added a compiler option to disable all optimizations. This is
14120 basically the "compatibility mode" because by using this option,
14121 the AML code will come out exactly the same as other ASL
14124 Added error messages for incorrectly ordered dependent resource
14125 functions. This includes: missing EndDependentFn macro at end of
14126 dependent resource list, nested dependent function macros (both
14127 start and end), and missing StartDependentFn macro. These are
14128 common errors that should be caught at compile time.
14130 Implemented _OSI support for the disassembler and compiler. _OSI
14131 must be included in the namespace for proper disassembly (because
14132 the disassembler must know the number of arguments.)
14134 Added an "optimization" message type that is optional (off by
14135 default). This message is used for all optimizations - including
14136 constant folding, integer optimization, and namepath optimization.
14138 ----------------------------------------
14139 25 July 2002. Summary of changes for this release.
14142 1) ACPI CA Core Subsystem Version 20020725:
14144 The AML Disassembler has been enhanced to produce compilable ASL
14145 code and has been integrated into the iASL compiler (see below) as
14146 well as the single-step disassembly for the AML debugger and the
14147 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
14148 resource templates and macros are fully supported. The
14149 disassembler has been tested on over 30 different AML files,
14150 producing identical AML when the resulting disassembled ASL file
14151 is recompiled with the same ASL compiler.
14153 Modified the Resource Manager to allow zero interrupts and zero
14154 dma channels during the GetCurrentResources call. This was
14155 causing problems on some platforms.
14157 Added the AcpiOsRedirectOutput interface to the OSL to simplify
14158 output redirection for the AcpiOsPrintf and AcpiOsVprintf
14161 Code and Data Size: Current core subsystem library sizes are shown
14162 below. These are the code and data sizes for the acpica.lib
14163 produced by the Microsoft Visual C++ 6.0 compiler, and these
14164 values do not include any ACPI driver or OSPM code. The debug
14165 version of the code includes the debug output trace mechanism and
14166 has a larger code and data size. Note that these values will vary
14167 depending on the efficiency of the compiler and the compiler
14168 options used during generation.
14171 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
14172 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
14174 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
14175 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
14180 Fixed a panic in the EC driver (Dominik Brodowski)
14182 Implemented checksum of the R/XSDT itself during Linux table scan
14188 The AML disassembler is integrated into the compiler. The "-d"
14189 option invokes the disassembler to completely disassemble an
14190 input AML file, producing as output a text ASL file with the
14191 extension ".dsl" (to avoid name collisions with existing .asl
14192 source files.) A future enhancement will allow the disassembler
14193 to obtain the BIOS DSDT from the registry under Windows.
14195 Fixed a problem with the VendorShort and VendorLong resource
14196 descriptors where an invalid AML sequence was created.
14198 Implemented a fix for BufferData term in the ASL parser. It was
14199 inadvertently defined twice, allowing invalid syntax to pass and
14200 causing reduction conflicts.
14202 Fixed a problem where the Ones opcode could get converted to a
14203 value of zero if "Ones" was used where a byte, word or dword value
14204 was expected. The 64-bit value is now truncated to the correct
14205 size with the correct value.
14209 ----------------------------------------
14210 02 July 2002. Summary of changes for this release.
14213 1) ACPI CA Core Subsystem Version 20020702:
14215 The Table Manager code has been restructured to add several new
14216 features. Tables that are not required by the core subsystem
14217 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
14218 validated in any way and are returned from AcpiGetFirmwareTable if
14219 requested. The AcpiOsTableOverride interface is now called for
14220 each table that is loaded by the subsystem in order to allow the
14221 host to override any table it chooses. Previously, only the DSDT
14222 could be overridden. Added one new files, tbrsdt.c and
14225 Fixed a problem with the conversion of internal package objects to
14226 external objects (when a package is returned from a control
14227 method.) The return buffer length was set to zero instead of the
14228 proper length of the package object.
14230 Fixed a reported problem with the use of the RefOf and DeRefOf
14231 operators when passing reference arguments to control methods. A
14232 new type of Reference object is used internally for references
14233 produced by the RefOf operator.
14235 Added additional error messages in the Resource Manager to explain
14236 AE_BAD_DATA errors when they occur during resource parsing.
14238 Split the AcpiEnableSubsystem into two primitives to enable a
14239 finer granularity initialization sequence. These two calls should
14240 be called in this order: AcpiEnableSubsystem (flags),
14241 AcpiInitializeObjects (flags). The flags parameter remains the
14247 Updated the ACPI utilities module to understand the new style of
14248 fully resolved package objects that are now returned from the core
14249 subsystem. This eliminates errors of the form:
14251 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
14252 acpi_utils-0430 [145] acpi_evaluate_reference:
14253 Invalid element in package (not a device reference)
14255 The method evaluation utility uses the new buffer allocation
14256 scheme instead of calling AcpiEvaluate Object twice.
14258 Added support for ECDT. This allows the use of the Embedded
14260 Controller before the namespace has been fully initialized, which
14261 is necessary for ACPI 2.0 support, and for some laptops to
14262 initialize properly. (Laptops using ECDT are still rare, so only
14263 limited testing was performed of the added functionality.)
14265 Fixed memory leaks in the EC driver.
14267 Eliminated a brittle code structure in acpi_bus_init().
14269 Eliminated the acpi_evaluate() helper function in utils.c. It is
14270 no longer needed since acpi_evaluate_object can optionally
14271 allocate memory for the return object.
14273 Implemented fix for keyboard hang when getting battery readings on
14274 some systems (Stephen White)
14276 PCI IRQ routing update (Dominik Brodowski)
14278 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
14281 ----------------------------------------
14282 11 June 2002. Summary of changes for this release.
14285 1) ACPI CA Core Subsystem Version 20020611:
14287 Fixed a reported problem where constants such as Zero and One
14288 appearing within _PRT packages were not handled correctly within
14289 the resource manager code. Originally reported against the ASL
14290 compiler because the code generator now optimizes integers to
14291 their minimal AML representation (i.e. AML constants if possible.)
14292 The _PRT code now handles all AML constant opcodes correctly
14293 (Zero, One, Ones, Revision).
14295 Fixed a problem with the Concatenate operator in the AML
14296 interpreter where a buffer result object was incorrectly marked as
14297 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
14299 All package sub-objects are now fully resolved before they are
14300 returned from the external ACPI interfaces. This means that name
14301 strings are resolved to object handles, and constant operators
14302 (Zero, One, Ones, Revision) are resolved to Integers.
14304 Implemented immediate resolution of the AML Constant opcodes
14305 (Zero, One, Ones, Revision) to Integer objects upon detection
14306 within the AML stream. This has simplified and reduced the
14307 generated code size of the subsystem by eliminating about 10
14308 switch statements for these constants (which previously were
14309 contained in Reference objects.) The complicating issues are that
14310 the Zero opcode is used as a "placeholder" for unspecified
14311 optional target operands and stores to constants are defined to be
14314 Code and Data Size: Current core subsystem library sizes are shown
14315 below. These are the code and data sizes for the acpica.lib
14316 produced by the Microsoft Visual C++ 6.0 compiler, and these
14317 values do not include any ACPI driver or OSPM code. The debug
14318 version of the code includes the debug output trace mechanism and
14319 has a larger code and data size. Note that these values will vary
14320 depending on the efficiency of the compiler and the compiler
14321 options used during generation.
14324 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
14325 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
14327 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
14328 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
14334 Added preliminary support for obtaining _TRA data for PCI root
14335 bridges (Bjorn Helgaas).
14338 3) iASL Compiler Version X2046:
14340 Fixed a problem where the "_DDN" reserved name was defined to be a
14341 control method with one argument. There are no arguments, and
14342 _DDN does not have to be a control method.
14344 Fixed a problem with the Linux version of the compiler where the
14345 source lines printed with error messages were the wrong lines.
14346 This turned out to be the "LF versus CR/LF" difference between
14347 Windows and Unix. This appears to be the longstanding issue
14348 concerning listing output and error messages.
14350 Fixed a problem with the Linux version of compiler where opcode
14351 names within error messages were wrong. This was caused by a
14352 slight difference in the output of the Flex tool on Linux versus
14355 Fixed a problem with the Linux compiler where the hex output files
14356 contained some garbage data caused by an internal buffer overrun.
14359 ----------------------------------------
14360 17 May 2002. Summary of changes for this release.
14363 1) ACPI CA Core Subsystem Version 20020517:
14365 Implemented a workaround to an BIOS bug discovered on the HP
14366 OmniBook where the FADT revision number and the table size are
14367 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
14368 behavior is to fallback to using only the ACPI 1.0 fields of the
14369 FADT if the table is too small to be a ACPI 2.0 table as claimed
14370 by the revision number. Although this is a BIOS bug, this is a
14371 case where the workaround is simple enough and with no side
14372 effects, so it seemed prudent to add it. A warning message is
14375 Implemented minimum size checks for the fixed-length ACPI tables -
14376 - the FADT and FACS, as well as consistency checks between the
14377 revision number and the table size.
14379 Fixed a reported problem in the table override support where the
14380 new table pointer was incorrectly treated as a physical address
14381 instead of a logical address.
14383 Eliminated the use of the AE_AML_ERROR exception and replaced it
14384 with more descriptive codes.
14386 Fixed a problem where an exception would occur if an ASL Field was
14387 defined with no named Field Units underneath it (used by some
14390 Code and Data Size: Current core subsystem library sizes are shown
14391 below. These are the code and data sizes for the acpica.lib
14392 produced by the Microsoft Visual C++ 6.0 compiler, and these
14393 values do not include any ACPI driver or OSPM code. The debug
14394 version of the code includes the debug output trace mechanism and
14395 has a larger code and data size. Note that these values will vary
14396 depending on the efficiency of the compiler and the compiler
14397 options used during generation.
14400 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
14401 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
14403 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
14404 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
14410 Much work done on ACPI init (MADT and PCI IRQ routing support).
14411 (Paul D. and Dominik Brodowski)
14413 Fix PCI IRQ-related panic on boot (Sam Revitch)
14415 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
14417 Fix "MHz" typo (Dominik Brodowski)
14419 Fix RTC year 2000 issue (Dominik Brodowski)
14421 Preclude multiple button proc entries (Eric Brunet)
14423 Moved arch-specific code out of include/platform/aclinux.h
14425 3) iASL Compiler Version X2044:
14427 Implemented error checking for the string used in the EISAID macro
14428 (Usually used in the definition of the _HID object.) The code now
14429 strictly enforces the PnP format - exactly 7 characters, 3
14430 uppercase letters and 4 hex digits.
14432 If a raw string is used in the definition of the _HID object
14433 (instead of the EISAID macro), the string must contain all
14434 alphanumeric characters (e.g., "*PNP0011" is not allowed because
14437 Implemented checking for invalid use of ACPI reserved names for
14438 most of the name creation operators (Name, Device, Event, Mutex,
14439 OperationRegion, PowerResource, Processor, and ThermalZone.)
14440 Previously, this check was only performed for control methods.
14442 Implemented an additional check on the Name operator to emit an
14443 error if a reserved name that must be implemented in ASL as a
14444 control method is used. We know that a reserved name must be a
14445 method if it is defined with input arguments.
14447 The warning emitted when a namespace object reference is not found
14448 during the cross reference phase has been changed into an error.
14449 The "External" directive should be used for names defined in other
14453 4) Tools and Utilities
14455 The 16-bit tools (adump16 and aexec16) have been regenerated and
14458 Fixed a problem with the output of both acpidump and adump16 where
14459 the indentation of closing parentheses and brackets was not
14461 aligned properly with the parent block.
14464 ----------------------------------------
14465 03 May 2002. Summary of changes for this release.
14468 1) ACPI CA Core Subsystem Version 20020503:
14470 Added support a new OSL interface that allows the host operating
14472 system software to override the DSDT found in the firmware -
14473 AcpiOsTableOverride. With this interface, the OSL can examine the
14474 version of the firmware DSDT and replace it with a different one
14477 Added new external interfaces for accessing ACPI registers from
14478 device drivers and other system software - AcpiGetRegister and
14479 AcpiSetRegister. This was simply an externalization of the
14480 existing AcpiHwBitRegister interfaces.
14482 Fixed a regression introduced in the previous build where the
14483 ASL/AML CreateField operator always returned an error,
14484 "destination must be a NS Node".
14486 Extended the maximum time (before failure) to successfully enable
14487 ACPI mode to 3 seconds.
14489 Code and Data Size: Current core subsystem library sizes are shown
14490 below. These are the code and data sizes for the acpica.lib
14491 produced by the Microsoft Visual C++ 6.0 compiler, and these
14492 values do not include any ACPI driver or OSPM code. The debug
14493 version of the code includes the debug output trace mechanism and
14494 has a larger code and data size. Note that these values will vary
14495 depending on the efficiency of the compiler and the compiler
14496 options used during generation.
14499 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
14500 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
14502 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
14503 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
14508 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
14509 free. While 3 out of 4 of our in-house systems work fine, the last
14510 one still hangs when testing the LAPIC timer.
14512 Renamed many files in 2.5 kernel release to omit "acpi_" from the
14515 Added warning on boot for Presario 711FR.
14517 Sleep improvements (Pavel Machek)
14519 ACPI can now be built without CONFIG_PCI enabled.
14521 IA64: Fixed memory map functions (JI Lee)
14524 3) iASL Compiler Version X2043:
14526 Added support to allow the compiler to be integrated into the MS
14527 VC++ development environment for one-button compilation of single
14528 files or entire projects -- with error-to-source-line mapping.
14530 Implemented support for compile-time constant folding for the
14531 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
14532 specification. This allows the ASL writer to use expressions
14533 instead of Integer/Buffer/String constants in terms that must
14534 evaluate to constants at compile time and will also simplify the
14535 emitted AML in any such sub-expressions that can be folded
14536 (evaluated at compile-time.) This increases the size of the
14537 compiler significantly because a portion of the ACPI CA AML
14538 interpreter is included within the compiler in order to pre-
14539 evaluate constant expressions.
14542 Fixed a problem with the "Unicode" ASL macro that caused the
14543 compiler to fault. (This macro is used in conjunction with the
14544 _STR reserved name.)
14546 Implemented an AML opcode optimization to use the Zero, One, and
14547 Ones opcodes where possible to further reduce the size of integer
14548 constants and thus reduce the overall size of the generated AML
14551 Implemented error checking for new reserved terms for ACPI version
14554 Implemented the -qr option to display the current list of ACPI
14555 reserved names known to the compiler.
14557 Implemented the -qc option to display the current list of ASL
14558 operators that are allowed within constant expressions and can
14559 therefore be folded at compile time if the operands are constants.
14564 Updated the Programmer's Reference for new interfaces, data types,
14565 and memory allocation model options.
14567 Updated the iASL Compiler User Reference to apply new format and
14568 add information about new features and options.
14570 ----------------------------------------
14571 19 April 2002. Summary of changes for this release.
14573 1) ACPI CA Core Subsystem Version 20020419:
14575 The source code base for the Core Subsystem has been completely
14576 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
14577 versions. The Lint option files used are included in the
14578 /acpi/generate/lint directory.
14580 Implemented enhanced status/error checking across the entire
14581 Hardware manager subsystem. Any hardware errors (reported from
14582 the OSL) are now bubbled up and will abort a running control
14586 Fixed a problem where the per-ACPI-table integer width (32 or 64)
14587 was stored only with control method nodes, causing a fault when
14588 non-control method code was executed during table loading. The
14589 solution implemented uses a global variable to indicate table
14590 width across the entire ACPI subsystem. Therefore, ACPI CA does
14591 not support mixed integer widths across different ACPI tables
14594 Fixed a problem where NULL extended fields (X fields) in an ACPI
14595 2.0 ACPI FADT caused the table load to fail. Although the
14596 existing ACPI specification is a bit fuzzy on this topic, the new
14597 behavior is to fall back on a ACPI 1.0 field if the corresponding
14598 ACPI 2.0 X field is zero (even though the table revision indicates
14599 a full ACPI 2.0 table.) The ACPI specification will be updated to
14600 clarify this issue.
14602 Fixed a problem with the SystemMemory operation region handler
14603 where memory was always accessed byte-wise even if the AML-
14604 specified access width was larger than a byte. This caused
14605 problems on systems with memory-mapped I/O. Memory is now
14606 accessed with the width specified. On systems that do not support
14607 non-aligned transfers, a check is made to guarantee proper address
14608 alignment before proceeding in order to avoid an AML-caused
14609 alignment fault within the kernel.
14612 Fixed a problem with the ExtendedIrq resource where only one byte
14613 of the 4-byte Irq field was extracted.
14615 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
14616 function was out of date and required a rewrite.
14618 Code and Data Size: Current core subsystem library sizes are shown
14619 below. These are the code and data sizes for the acpica.lib
14620 produced by the Microsoft Visual C++ 6.0 compiler, and these
14621 values do not include any ACPI driver or OSPM code. The debug
14622 version of the code includes the debug output trace mechanism and
14623 has a larger code and data size. Note that these values will vary
14624 depending on the efficiency of the compiler and the compiler
14625 options used during generation.
14628 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
14629 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
14631 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
14632 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
14637 PCI IRQ routing fixes (Dominik Brodowski)
14640 3) iASL Compiler Version X2042:
14642 Implemented an additional compile-time error check for a field
14643 unit whose size + minimum access width would cause a run-time
14644 access beyond the end-of-region. Previously, only the field size
14645 itself was checked.
14647 The Core subsystem and iASL compiler now share a common parse
14648 object in preparation for compile-time evaluation of the type
14649 3/4/5 ASL operators.
14652 ----------------------------------------
14653 Summary of changes for this release: 03_29_02
14655 1) ACPI CA Core Subsystem Version 20020329:
14657 Implemented support for late evaluation of TermArg operands to
14658 Buffer and Package objects. This allows complex expressions to be
14659 used in the declarations of these object types.
14661 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
14662 1.0, if the field was larger than 32 bits, it was returned as a
14663 buffer - otherwise it was returned as an integer. In ACPI 2.0,
14664 the field is returned as a buffer only if the field is larger than
14665 64 bits. The TableRevision is now considered when making this
14666 conversion to avoid incompatibility with existing ASL code.
14668 Implemented logical addressing for AcpiOsGetRootPointer. This
14669 allows an RSDP with either a logical or physical address. With
14670 this support, the host OS can now override all ACPI tables with
14671 one logical RSDP. Includes implementation of "typed" pointer
14672 support to allow a common data type for both physical and logical
14673 pointers internally. This required a change to the
14674 AcpiOsGetRootPointer interface.
14676 Implemented the use of ACPI 2.0 Generic Address Structures for all
14677 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
14678 mapped I/O for these ACPI features.
14680 Initialization now ignores not only non-required tables (All
14681 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
14682 not validate the table headers of unrecognized tables.
14684 Fixed a problem where a notify handler could only be
14685 installed/removed on an object of type Device. All "notify"
14687 objects are now supported -- Devices, Processor, Power, and
14690 Removed most verbosity from the ACPI_DB_INFO debug level. Only
14691 critical information is returned when this debug level is enabled.
14693 Code and Data Size: Current core subsystem library sizes are shown
14694 below. These are the code and data sizes for the acpica.lib
14695 produced by the Microsoft Visual C++ 6.0 compiler, and these
14696 values do not include any ACPI driver or OSPM code. The debug
14697 version of the code includes the debug output trace mechanism and
14698 has a larger code and data size. Note that these values will vary
14699 depending on the efficiency of the compiler and the compiler
14700 options used during generation.
14703 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
14704 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
14706 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
14707 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
14712 The processor driver (acpi_processor.c) now fully supports ACPI
14713 2.0-based processor performance control (e.g. Intel(R)
14714 SpeedStep(TM) technology) Note that older laptops that only have
14715 the Intel "applet" interface are not supported through this. The
14716 'limit' and 'performance' interface (/proc) are fully functional.
14717 [Note that basic policy for controlling performance state
14718 transitions will be included in the next version of ospmd.] The
14719 idle handler was modified to more aggressively use C2, and PIIX4
14720 errata handling underwent a complete overhaul (big thanks to
14721 Dominik Brodowski).
14723 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
14724 based devices in the ACPI namespace are now dynamically bound
14725 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
14726 This allows, among other things, ACPI to resolve bus numbers for
14727 subordinate PCI bridges.
14729 Enhanced PCI IRQ routing to get the proper bus number for _PRT
14730 entries defined underneath PCI bridges.
14732 Added IBM 600E to bad bios list due to invalid _ADR value for
14733 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
14735 In the process of adding full MADT support (e.g. IOAPIC) for IA32
14736 (acpi.c, mpparse.c) -- stay tuned.
14738 Added back visual differentiation between fixed-feature and
14739 control-method buttons in dmesg. Buttons are also subtyped (e.g.
14740 button/power/PWRF) to simplify button identification.
14742 We no longer use -Wno-unused when compiling debug. Please ignore
14743 any "_THIS_MODULE defined but not used" messages.
14745 Can now shut down the system using "magic sysrq" key.
14748 3) iASL Compiler version 2041:
14750 Fixed a problem where conversion errors for hex/octal/decimal
14751 constants were not reported.
14753 Implemented a fix for the General Register template Address field.
14754 This field was 8 bits when it should be 64.
14756 Fixed a problem where errors/warnings were no longer being emitted
14757 within the listing output file.
14759 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
14760 exactly 4 characters, alphanumeric only.
14765 ----------------------------------------
14766 Summary of changes for this release: 03_08_02
14769 1) ACPI CA Core Subsystem Version 20020308:
14771 Fixed a problem with AML Fields where the use of the "AccessAny"
14772 keyword could cause an interpreter error due to attempting to read
14773 or write beyond the end of the parent Operation Region.
14775 Fixed a problem in the SystemMemory Operation Region handler where
14776 an attempt was made to map memory beyond the end of the region.
14777 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
14778 errors on some Linux systems.
14780 Fixed a problem where the interpreter/namespace "search to root"
14781 algorithm was not functioning for some object types. Relaxed the
14782 internal restriction on the search to allow upsearches for all
14783 external object types as well as most internal types.
14788 We now use safe_halt() macro versus individual calls to sti | hlt.
14790 Writing to the processor limit interface should now work. "echo 1"
14791 will increase the limit, 2 will decrease, and 0 will reset to the
14798 Fixed segfault on Linux version.
14801 ----------------------------------------
14802 Summary of changes for this release: 02_25_02
14804 1) ACPI CA Core Subsystem:
14807 Fixed a problem where the GPE bit masks were not initialized
14808 properly, causing erratic GPE behavior.
14810 Implemented limited support for multiple calling conventions. The
14811 code can be generated with either the VPL (variable parameter
14812 list, or "C") convention, or the FPL (fixed parameter list, or
14813 "Pascal") convention. The core subsystem is about 3.4% smaller
14814 when generated with FPL.
14819 Re-add some /proc/acpi/event functionality that was lost during
14822 Resolved issue with /proc events for fixed-feature buttons showing
14823 up as the system device.
14825 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
14827 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
14829 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
14831 Fixed limit interface & usage to fix bugs with passive cooling
14834 Restructured PRT support.
14837 ----------------------------------------
14838 Summary of changes for this label: 02_14_02
14841 1) ACPI CA Core Subsystem:
14843 Implemented support in AcpiLoadTable to allow loading of FACS and
14846 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
14847 been removed. All 64-bit platforms should be migrated to the ACPI
14848 2.0 tables. The actbl71.h header has been removed from the source
14851 All C macros defined within the subsystem have been prefixed with
14852 "ACPI_" to avoid collision with other system include files.
14854 Removed the return value for the two AcpiOsPrint interfaces, since
14855 it is never used and causes lint warnings for ignoring the return
14858 Added error checking to all internal mutex acquire and release
14859 calls. Although a failure from one of these interfaces is
14860 probably a fatal system error, these checks will cause the
14861 immediate abort of the currently executing method or interface.
14863 Fixed a problem where the AcpiSetCurrentResources interface could
14864 fault. This was a side effect of the deployment of the new memory
14867 Fixed a couple of problems with the Global Lock support introduced
14868 in the last major build. The "common" (1.0/2.0) internal FACS was
14869 being overwritten with the FACS signature and clobbering the
14870 Global Lock pointer. Also, the actual firmware FACS was being
14871 unmapped after construction of the "common" FACS, preventing
14872 access to the actual Global Lock field within it. The "common"
14873 internal FACS is no longer installed as an actual ACPI table; it
14874 is used simply as a global.
14876 Code and Data Size: Current core subsystem library sizes are shown
14877 below. These are the code and data sizes for the acpica.lib
14878 produced by the Microsoft Visual C++ 6.0 compiler, and these
14879 values do not include any ACPI driver or OSPM code. The debug
14880 version of the code includes the debug output trace mechanism and
14881 has a larger code and data size. Note that these values will vary
14882 depending on the efficiency of the compiler and the compiler
14883 options used during generation.
14885 Previous Release (02_07_01)
14886 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
14887 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
14889 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
14890 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
14895 Updated Linux-specific code for core macro and OSL interface
14896 changes described above.
14898 Improved /proc/acpi/event. It now can be opened only once and has
14899 proper poll functionality.
14901 Fixed and restructured power management (acpi_bus).
14903 Only create /proc "view by type" when devices of that class exist.
14905 Fixed "charging/discharging" bug (and others) in acpi_battery.
14907 Improved thermal zone code.
14910 3) ASL Compiler, version X2039:
14913 Implemented the new compiler restriction on ASL String hex/octal
14914 escapes to non-null, ASCII values. An error results if an invalid
14915 value is used. (This will require an ACPI 2.0 specification
14918 AML object labels that are output to the optional C and ASM source
14919 are now prefixed with both the ACPI table signature and table ID
14920 to help guarantee uniqueness within a large BIOS project.
14923 ----------------------------------------
14924 Summary of changes for this label: 02_01_02
14926 1) ACPI CA Core Subsystem:
14928 ACPI 2.0 support is complete in the entire Core Subsystem and the
14929 ASL compiler. All new ACPI 2.0 operators are implemented and all
14930 other changes for ACPI 2.0 support are complete. With
14931 simultaneous code and data optimizations throughout the subsystem,
14932 ACPI 2.0 support has been implemented with almost no additional
14933 cost in terms of code and data size.
14935 Implemented a new mechanism for allocation of return buffers. If
14936 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
14937 be allocated on behalf of the caller. Consolidated all return
14938 buffer validation and allocation to a common procedure. Return
14939 buffers will be allocated via the primary OSL allocation interface
14940 since it appears that a separate pool is not needed by most users.
14941 If a separate pool is required for these buffers, the caller can
14942 still use the original mechanism and pre-allocate the buffer(s).
14944 Implemented support for string operands within the DerefOf
14947 Restructured the Hardware and Event managers to be table driven,
14948 simplifying the source code and reducing the amount of generated
14951 Split the common read/write low-level ACPI register bitfield
14952 procedure into a separate read and write, simplifying the code
14955 Obsoleted the AcpiOsCallocate OSL interface. This interface was
14956 used only a handful of times and didn't have enough critical mass
14957 for a separate interface. Replaced with a common calloc procedure
14960 Fixed a reported problem with the GPE number mapping mechanism
14961 that allows GPE1 numbers to be non-contiguous with GPE0.
14962 Reorganized the GPE information and shrunk a large array that was
14963 originally large enough to hold info for all possible GPEs (256)
14964 to simply large enough to hold all GPEs up to the largest GPE
14965 number on the machine.
14967 Fixed a reported problem with resource structure alignment on 64-
14970 Changed the AcpiEnableEvent and AcpiDisableEvent external
14971 interfaces to not require any flags for the common case of
14972 enabling/disabling a GPE.
14974 Implemented support to allow a "Notify" on a Processor object.
14976 Most TBDs in comments within the source code have been resolved
14980 Fixed a problem in the interpreter where a standalone parent
14981 prefix (^) was not handled correctly in the interpreter and
14984 Removed obsolete and unnecessary GPE save/restore code.
14986 Implemented Field support in the ASL Load operator. This allows a
14987 table to be loaded from a named field, in addition to loading a
14988 table directly from an Operation Region.
14990 Implemented timeout and handle support in the external Global Lock
14993 Fixed a problem in the AcpiDump utility where pathnames were no
14994 longer being generated correctly during the dump of named objects.
14996 Modified the AML debugger to give a full display of if/while
14997 predicates instead of just one AML opcode at a time. (The
14998 predicate can have several nested ASL statements.) The old method
14999 was confusing during single stepping.
15001 Code and Data Size: Current core subsystem library sizes are shown
15002 below. These are the code and data sizes for the acpica.lib
15003 produced by the Microsoft Visual C++ 6.0 compiler, and these
15004 values do not include any ACPI driver or OSPM code. The debug
15005 version of the code includes the debug output trace mechanism and
15006 has a larger code and data size. Note that these values will vary
15007 depending on the efficiency of the compiler and the compiler
15008 options used during generation.
15010 Previous Release (12_18_01)
15011 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
15012 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
15014 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
15015 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
15019 Implemented fix for PIIX reverse throttling errata (Processor
15022 Added new Limit interface (Processor and Thermal drivers)
15024 New thermal policy (Thermal driver)
15026 Many updates to /proc
15028 Battery "low" event support (Battery driver)
15030 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
15032 IA32 - IA64 initialization unification, no longer experimental
15034 Menuconfig options redesigned
15036 3) ASL Compiler, version X2037:
15038 Implemented several new output features to simplify integration of
15039 AML code into firmware: 1) Output the AML in C source code with
15040 labels for each named ASL object. The original ASL source code
15041 is interleaved as C comments. 2) Output the AML in ASM source code
15042 with labels and interleaved ASL source. 3) Output the AML in
15043 raw hex table form, in either C or ASM.
15045 Implemented support for optional string parameters to the
15046 LoadTable operator.
15048 Completed support for embedded escape sequences within string
15049 literals. The compiler now supports all single character escapes
15050 as well as the Octal and Hex escapes. Note: the insertion of a
15051 null byte into a string literal (via the hex/octal escape) causes
15052 the string to be immediately terminated. A warning is issued.
15054 Fixed a problem where incorrect AML was generated for the case
15055 where an ASL namepath consists of a single parent prefix (
15057 ) with no trailing name segments.
15059 The compiler has been successfully generated with a 64-bit C
15065 ----------------------------------------
15066 Summary of changes for this label: 12_18_01
15070 Enhanced blacklist with reason and severity fields. Any table's
15071 signature may now be used to identify a blacklisted system.
15073 Call _PIC control method to inform the firmware which interrupt
15074 model the OS is using. Turn on any disabled link devices.
15076 Cleaned up busmgr /proc error handling (Andreas Dilger)
15078 2) ACPI CA Core Subsystem:
15080 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
15083 Completed implementation of the ACPI 2.0 "Continue",
15084 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
15085 operators. All new ACPI 2.0 operators are now implemented in both
15086 the ASL compiler and the AML interpreter. The only remaining ACPI
15087 2.0 task is support for the String data type in the DerefOf
15088 operator. Fixed a problem with AcquireMutex where the status code
15089 was lost if the caller had to actually wait for the mutex.
15091 Increased the maximum ASL Field size from 64K bits to 4G bits.
15093 Completed implementation of the external Global Lock interfaces --
15094 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
15095 Handler parameters were added.
15097 Completed another pass at removing warnings and issues when
15098 compiling with 64-bit compilers. The code now compiles cleanly
15099 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
15100 add and subtract (diff) macros have changed considerably.
15103 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
15104 64-bit platforms, 32-bits on all others. This type is used
15105 wherever memory allocation and/or the C sizeof() operator is used,
15106 and affects the OSL memory allocation interfaces AcpiOsAllocate
15107 and AcpiOsCallocate.
15109 Implemented sticky user breakpoints in the AML debugger.
15111 Code and Data Size: Current core subsystem library sizes are shown
15112 below. These are the code and data sizes for the acpica.lib
15113 produced by the Microsoft Visual C++ 6.0 compiler, and these
15114 values do not include any ACPI driver or OSPM code. The debug
15115 version of the code includes the debug output trace mechanism and
15116 has a larger code and data size. Note that these values will vary
15117 depending on the efficiency of the compiler and the compiler
15118 options used during generation.
15120 Previous Release (12_05_01)
15121 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
15122 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
15124 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
15125 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
15127 3) ASL Compiler, version X2034:
15129 Now checks for (and generates an error if detected) the use of a
15130 Break or Continue statement without an enclosing While statement.
15133 Successfully generated the compiler with the Intel 64-bit C
15136 ----------------------------------------
15137 Summary of changes for this label: 12_05_01
15139 1) ACPI CA Core Subsystem:
15141 The ACPI 2.0 CopyObject operator is fully implemented. This
15142 operator creates a new copy of an object (and is also used to
15143 bypass the "implicit conversion" mechanism of the Store operator.)
15145 The ACPI 2.0 semantics for the SizeOf operator are fully
15146 implemented. The change is that performing a SizeOf on a
15147 reference object causes an automatic dereference of the object to
15148 tha actual value before the size is evaluated. This behavior was
15149 undefined in ACPI 1.0.
15151 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
15152 have been implemented. The interrupt polarity and mode are now
15155 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
15156 appearing in Package objects were not properly converted to
15157 integers when the internal Package was converted to an external
15158 object (via the AcpiEvaluateObject interface.)
15160 Fixed a problem with the namespace object deletion mechanism for
15161 objects created by control methods. There were two parts to this
15162 problem: 1) Objects created during the initialization phase method
15163 parse were not being deleted, and 2) The object owner ID mechanism
15164 to track objects was broken.
15166 Fixed a problem where the use of the ASL Scope operator within a
15167 control method would result in an invalid opcode exception.
15169 Fixed a problem introduced in the previous label where the buffer
15170 length required for the _PRT structure was not being returned
15173 Code and Data Size: Current core subsystem library sizes are shown
15174 below. These are the code and data sizes for the acpica.lib
15175 produced by the Microsoft Visual C++ 6.0 compiler, and these
15176 values do not include any ACPI driver or OSPM code. The debug
15177 version of the code includes the debug output trace mechanism and
15178 has a larger code and data size. Note that these values will vary
15179 depending on the efficiency of the compiler and the compiler
15180 options used during generation.
15182 Previous Release (11_20_01)
15183 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
15184 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
15187 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
15188 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
15192 Updated all files to apply cleanly against 2.4.16.
15194 Added basic PCI Interrupt Routing Table (PRT) support for IA32
15195 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
15196 version supports both static and dyanmic PRT entries, but dynamic
15197 entries are treated as if they were static (not yet
15198 reconfigurable). Architecture- specific code to use this data is
15199 absent on IA32 but should be available shortly.
15201 Changed the initialization sequence to start the ACPI interpreter
15202 (acpi_init) prior to initialization of the PCI driver (pci_init)
15203 in init/main.c. This ordering is required to support PRT and
15204 facilitate other (future) enhancement. A side effect is that the
15205 ACPI bus driver and certain device drivers can no longer be loaded
15208 Modified the 'make menuconfig' options to allow PCI Interrupt
15209 Routing support to be included without the ACPI Bus and other
15212 3) ASL Compiler, version X2033:
15214 Fixed some issues with the use of the new CopyObject and
15215 DataTableRegion operators. Both are fully functional.
15217 ----------------------------------------
15218 Summary of changes for this label: 11_20_01
15220 20 November 2001. Summary of changes for this release.
15222 1) ACPI CA Core Subsystem:
15224 Updated Index support to match ACPI 2.0 semantics. Storing a
15225 Integer, String, or Buffer to an Index of a Buffer will store only
15226 the least-significant byte of the source to the Indexed buffer
15227 byte. Multiple writes are not performed.
15229 Fixed a problem where the access type used in an AccessAs ASL
15230 operator was not recorded correctly into the field object.
15232 Fixed a problem where ASL Event objects were created in a
15233 signalled state. Events are now created in an unsignalled state.
15235 The internal object cache is now purged after table loading and
15236 initialization to reduce the use of dynamic kernel memory -- on
15237 the assumption that object use is greatest during the parse phase
15238 of the entire table (versus the run-time use of individual control
15241 ACPI 2.0 variable-length packages are now fully operational.
15243 Code and Data Size: Code and Data optimizations have permitted new
15244 feature development with an actual reduction in the library size.
15245 Current core subsystem library sizes are shown below. These are
15246 the code and data sizes for the acpica.lib produced by the
15247 Microsoft Visual C++ 6.0 compiler, and these values do not include
15248 any ACPI driver or OSPM code. The debug version of the code
15249 includes the debug output trace mechanism and has a larger code
15250 and data size. Note that these values will vary depending on the
15251 efficiency of the compiler and the compiler options used during
15254 Previous Release (11_09_01):
15255 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
15256 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
15259 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
15260 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
15264 Enhanced the ACPI boot-time initialization code to allow the use
15265 of Local APIC tables for processor enumeration on IA-32, and to
15266 pave the way for a fully MPS-free boot (on SMP systems) in the
15267 near future. This functionality replaces
15268 arch/i386/kernel/acpitables.c, which was introduced in an earlier
15269 2.4.15-preX release. To enable this feature you must add
15270 "acpi_boot=on" to the kernel command line -- see the help entry
15271 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
15274 Restructured the configuration options to allow boot-time table
15275 parsing support without inclusion of the ACPI Interpreter (and
15278 NOTE: This release does not include fixes for the reported events,
15279 power-down, and thermal passive cooling issues (coming soon).
15283 Added additional typechecking for Fields within restricted access
15284 Operation Regions. All fields within EC and CMOS regions must be
15285 declared with ByteAcc. All fields withing SMBus regions must be
15286 declared with the BufferAcc access type.
15288 Fixed a problem where the listing file output of control methods
15289 no longer interleaved the actual AML code with the ASL source
15295 ----------------------------------------
15296 Summary of changes for this label: 11_09_01
15298 1) ACPI CA Core Subsystem:
15300 Implemented ACPI 2.0-defined support for writes to fields with a
15301 Buffer, String, or Integer source operand that is smaller than the
15302 target field. In these cases, the source operand is zero-extended
15303 to fill the target field.
15305 Fixed a problem where a Field starting bit offset (within the
15306 parent operation region) was calculated incorrectly if the
15308 alignment of the field differed from the access width. This
15309 affected CreateWordField, CreateDwordField, CreateQwordField, and
15310 possibly other fields that use the "AccessAny" keyword.
15312 Fixed a problem introduced in the 11_02_01 release where indirect
15313 stores through method arguments did not operate correctly.
15317 Implemented boot-time ACPI table parsing support
15318 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
15319 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
15320 legacy BIOS interfaces (e.g. MPS) for the configuration of system
15321 processors, memory, and interrupts during setup_arch(). Note that
15322 this patch does not include the required architecture-specific
15323 changes required to apply this information -- subsequent patches
15324 will be posted for both IA32 and IA64 to achieve this.
15326 Added low-level sleep support for IA32 platforms, courtesy of Pat
15327 Mochel. This allows IA32 systems to transition to/from various
15328 sleeping states (e.g. S1, S3), although the lack of a centralized
15329 driver model and power-manageable drivers will prevent its
15330 (successful) use on most systems.
15332 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
15333 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
15334 tables" option, etc.
15336 Increased the default timeout for the EC driver from 1ms to 10ms
15337 (1000 cycles of 10us) to try to address AE_TIME errors during EC
15340 ----------------------------------------
15341 Summary of changes for this label: 11_02_01
15343 1) ACPI CA Core Subsystem:
15345 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
15346 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
15349 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
15350 changes to support ACPI 2.0 Qword field access. Read/Write
15351 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
15352 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
15353 the value parameter for the address space handler interface is now
15354 an ACPI_INTEGER. OSL implementations of these interfaces must now
15355 handle the case where the Width parameter is 64.
15357 Index Fields: Fixed a problem where unaligned bit assembly and
15358 disassembly for IndexFields was not supported correctly.
15360 Index and Bank Fields: Nested Index and Bank Fields are now
15361 supported. During field access, a check is performed to ensure
15362 that the value written to an Index or Bank register is not out of
15363 the range of the register. The Index (or Bank) register is
15364 written before each access to the field data. Future support will
15365 include allowing individual IndexFields to be wider than the
15366 DataRegister width.
15368 Fields: Fixed a problem where the AML interpreter was incorrectly
15369 attempting to write beyond the end of a Field/OpRegion. This was
15370 a boundary case that occurred when a DWORD field was written to a
15371 BYTE access OpRegion, forcing multiple writes and causing the
15372 interpreter to write one datum too many.
15374 Fields: Fixed a problem with Field/OpRegion access where the
15375 starting bit address of a field was incorrectly calculated if the
15376 current access type was wider than a byte (WordAcc, DwordAcc, or
15379 Fields: Fixed a problem where forward references to individual
15380 FieldUnits (individual Field names within a Field definition) were
15381 not resolved during the AML table load.
15383 Fields: Fixed a problem where forward references from a Field
15384 definition to the parent Operation Region definition were not
15385 resolved during the AML table load.
15387 Fields: Duplicate FieldUnit names within a scope are now detected
15388 during AML table load.
15390 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
15391 returned an incorrect name for the root node.
15393 Code and Data Size: Code and Data optimizations have permitted new
15394 feature development with an actual reduction in the library size.
15395 Current core subsystem library sizes are shown below. These are
15396 the code and data sizes for the acpica.lib produced by the
15397 Microsoft Visual C++ 6.0 compiler, and these values do not include
15398 any ACPI driver or OSPM code. The debug version of the code
15399 includes the debug output trace mechanism and has a larger code
15400 and data size. Note that these values will vary depending on the
15401 efficiency of the compiler and the compiler options used during
15404 Previous Release (10_18_01):
15405 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
15406 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
15409 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
15410 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
15414 Improved /proc processor output (Pavel Machek) Re-added
15415 MODULE_LICENSE("GPL") to all modules.
15417 3) ASL Compiler version X2030:
15419 Duplicate FieldUnit names within a scope are now detected and
15424 Programmer Reference updated to reflect OSL and address space
15425 handler interface changes described above.
15427 ----------------------------------------
15428 Summary of changes for this label: 10_18_01
15430 ACPI CA Core Subsystem:
15432 Fixed a problem with the internal object reference count mechanism
15433 that occasionally caused premature object deletion. This resolves
15434 all of the outstanding problem reports where an object is deleted
15435 in the middle of an interpreter evaluation. Although this problem
15436 only showed up in rather obscure cases, the solution to the
15437 problem involved an adjustment of all reference counts involving
15438 objects attached to namespace nodes.
15440 Fixed a problem with Field support in the interpreter where
15441 writing to an aligned field whose length is an exact multiple (2
15442 or greater) of the field access granularity would cause an attempt
15443 to write beyond the end of the field.
15445 The top level AML opcode execution functions within the
15446 interpreter have been renamed with a more meaningful and
15447 consistent naming convention. The modules exmonad.c and
15448 exdyadic.c were eliminated. New modules are exoparg1.c,
15449 exoparg2.c, exoparg3.c, and exoparg6.c.
15451 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
15453 Fixed a problem where the AML debugger was causing some internal
15454 objects to not be deleted during subsystem termination.
15456 Fixed a problem with the external AcpiEvaluateObject interface
15457 where the subsystem would fault if the named object to be
15458 evaluated refered to a constant such as Zero, Ones, etc.
15460 Fixed a problem with IndexFields and BankFields where the
15461 subsystem would fault if the index, data, or bank registers were
15462 not defined in the same scope as the field itself.
15464 Added printf format string checking for compilers that support
15465 this feature. Corrected more than 50 instances of issues with
15466 format specifiers within invocations of ACPI_DEBUG_PRINT
15467 throughout the core subsystem code.
15469 The ASL "Revision" operator now returns the ACPI support level
15470 implemented in the core - the value "2" since the ACPI 2.0 support
15471 is more than 50% implemented.
15473 Enhanced the output of the AML debugger "dump namespace" command
15474 to output in a more human-readable form.
15476 Current core subsystem library code sizes are shown below. These
15478 are the code and data sizes for the acpica.lib produced by the
15479 Microsoft Visual C++ 6.0 compiler, and these values do not include
15480 any ACPI driver or OSPM code. The debug version of the code
15481 includes the full debug trace mechanism -- leading to a much
15483 larger code and data size. Note that these values will vary
15484 depending on the efficiency of the compiler and the compiler
15485 options used during generation.
15487 Previous Label (09_20_01):
15488 Non-Debug Version: 65K Code, 5K Data, 70K Total
15489 Debug Version: 138K Code, 58K Data, 196K Total
15493 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
15494 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
15498 Implemented a "Bad BIOS Blacklist" to track machines that have
15499 known ASL/AML problems.
15501 Enhanced the /proc interface for the thermal zone driver and added
15502 support for _HOT (the critical suspend trip point). The 'info'
15503 file now includes threshold/policy information, and allows setting
15504 of _SCP (cooling preference) and _TZP (polling frequency) values
15505 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
15506 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
15507 preference to the passive/quiet mode (if supported by the ASL).
15509 Implemented a workaround for a gcc bug that resuted in an OOPs
15510 when loading the control method battery driver.
15512 ----------------------------------------
15513 Summary of changes for this label: 09_20_01
15515 ACPI CA Core Subsystem:
15517 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
15518 modified to allow individual GPE levels to be flagged as wake-
15519 enabled (i.e., these GPEs are to remain enabled when the platform
15522 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
15523 support wake-enabled GPEs. This means that upon entering the
15524 sleep state, all GPEs that are not wake-enabled are disabled.
15525 When leaving the sleep state, these GPEs are reenabled.
15527 A local double-precision divide/modulo module has been added to
15528 enhance portability to OS kernels where a 64-bit math library is
15529 not available. The new module is "utmath.c".
15531 Several optimizations have been made to reduce the use of CPU
15532 stack. Originally over 2K, the maximum stack usage is now below
15533 2K at 1860 bytes (1.82k)
15535 Fixed a problem with the AcpiGetFirmwareTable interface where the
15536 root table pointer was not mapped into a logical address properly.
15538 Fixed a problem where a NULL pointer was being dereferenced in the
15539 interpreter code for the ASL Notify operator.
15541 Fixed a problem where the use of the ASL Revision operator
15542 returned an error. This operator now returns the current version
15543 of the ACPI CA core subsystem.
15545 Fixed a problem where objects passed as control method parameters
15546 to AcpiEvaluateObject were always deleted at method termination.
15547 However, these objects may end up being stored into the namespace
15548 by the called method. The object reference count mechanism was
15549 applied to these objects instead of a force delete.
15551 Fixed a problem where static strings or buffers (contained in the
15552 AML code) that are declared as package elements within the ASL
15553 code could cause a fault because the interpreter would attempt to
15554 delete them. These objects are now marked with the "static
15555 object" flag to prevent any attempt to delete them.
15557 Implemented an interpreter optimization to use operands directly
15558 from the state object instead of extracting the operands to local
15559 variables. This reduces stack use and code size, and improves
15562 The module exxface.c was eliminated as it was an unnecessary extra
15565 Current core subsystem library code sizes are shown below. These
15566 are the code and data sizes for the acpica.lib produced by the
15567 Microsoft Visual C++ 6.0 compiler, and these values do not include
15568 any ACPI driver or OSPM code. The debug version of the code
15569 includes the full debug trace mechanism -- leading to a much
15570 larger code and data size. Note that these values will vary
15571 depending on the efficiency of the compiler and the compiler
15572 options used during generation.
15574 Non-Debug Version: 65K Code, 5K Data, 70K Total
15575 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
15576 Total (Previously 195K)
15580 Support for ACPI 2.0 64-bit integers has been added. All ACPI
15581 Integer objects are now 64 bits wide
15583 All Acpi data types and structures are now in lower case. Only
15584 Acpi macros are upper case for differentiation.
15588 Changes to the external interfaces as described above.
15590 ----------------------------------------
15591 Summary of changes for this label: 08_31_01
15593 ACPI CA Core Subsystem:
15595 A bug with interpreter implementation of the ASL Divide operator
15596 was found and fixed. The implicit function return value (not the
15597 explicit store operands) was returning the remainder instead of
15598 the quotient. This was a longstanding bug and it fixes several
15599 known outstanding issues on various platforms.
15601 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
15602 been further optimized for size. There are 700 invocations of the
15603 DEBUG_PRINT macro alone, so each optimization reduces the size of
15604 the debug version of the subsystem significantly.
15606 A stack trace mechanism has been implemented. The maximum stack
15607 usage is about 2K on 32-bit platforms. The debugger command "stat
15608 stack" will display the current maximum stack usage.
15610 All public symbols and global variables within the subsystem are
15611 now prefixed with the string "Acpi". This keeps all of the
15612 symbols grouped together in a kernel map, and avoids conflicts
15613 with other kernel subsystems.
15615 Most of the internal fixed lookup tables have been moved into the
15616 code segment via the const operator.
15618 Several enhancements have been made to the interpreter to both
15619 reduce the code size and improve performance.
15621 Current core subsystem library code sizes are shown below. These
15622 are the code and data sizes for the acpica.lib produced by the
15623 Microsoft Visual C++ 6.0 compiler, and these values do not include
15624 any ACPI driver or OSPM code. The debug version of the code
15625 includes the full debug trace mechanism which contains over 700
15626 invocations of the DEBUG_PRINT macro, 500 function entry macro
15627 invocations, and over 900 function exit macro invocations --
15628 leading to a much larger code and data size. Note that these
15629 values will vary depending on the efficiency of the compiler and
15630 the compiler options used during generation.
15632 Non-Debug Version: 64K Code, 5K Data, 69K Total
15633 Debug Version: 137K Code, 58K Data, 195K Total
15637 Implemented wbinvd() macro, pending a kernel-wide definition.
15639 Fixed /proc/acpi/event to handle poll() and short reads.
15641 ASL Compiler, version X2026:
15643 Fixed a problem introduced in the previous label where the AML
15645 code emitted for package objects produced packages with zero
15648 ----------------------------------------
15649 Summary of changes for this label: 08_16_01
15651 ACPI CA Core Subsystem:
15653 The following ACPI 2.0 ASL operators have been implemented in the
15654 AML interpreter (These are already supported by the Intel ASL
15655 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
15656 ToBuffer. Support for 64-bit AML constants is implemented in the
15657 AML parser, debugger, and disassembler.
15659 The internal memory tracking mechanism (leak detection code) has
15660 been upgraded to reduce the memory overhead (a separate tracking
15661 block is no longer allocated for each memory allocation), and now
15662 supports all of the internal object caches.
15664 The data structures and code for the internal object caches have
15665 been coelesced and optimized so that there is a single cache and
15666 memory list data structure and a single group of functions that
15667 implement generic cache management. This has reduced the code
15668 size in both the debug and release versions of the subsystem.
15670 The DEBUG_PRINT macro(s) have been optimized for size and replaced
15671 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
15672 different, because it generates a single call to an internal
15673 function. This results in a savings of about 90 bytes per
15674 invocation, resulting in an overall code and data savings of about
15675 16% in the debug version of the subsystem.
15679 Fixed C3 disk corruption problems and re-enabled C3 on supporting
15682 Integrated low-level sleep code by Patrick Mochel.
15684 Further tweaked source code Linuxization.
15690 Support for ACPI 2.0 variable length packages is fixed/completed.
15692 Fixed a problem where the optional length parameter for the ACPI
15693 2.0 ToString operator.
15695 Fixed multiple extraneous error messages when a syntax error is
15696 detected within the declaration line of a control method.
15698 ----------------------------------------
15699 Summary of changes for this label: 07_17_01
15701 ACPI CA Core Subsystem:
15703 Added a new interface named AcpiGetFirmwareTable to obtain any
15704 ACPI table via the ACPI signature. The interface can be called at
15705 any time during kernel initialization, even before the kernel
15706 virtual memory manager is initialized and paging is enabled. This
15707 allows kernel subsystems to obtain ACPI tables very early, even
15708 before the ACPI CA subsystem is initialized.
15710 Fixed a problem where Fields defined with the AnyAcc attribute
15711 could be resolved to the incorrect address under the following
15712 conditions: 1) the field width is larger than 8 bits and 2) the
15713 parent operation region is not defined on a DWORD boundary.
15715 Fixed a problem where the interpreter is not being locked during
15716 namespace initialization (during execution of the _INI control
15717 methods), causing an error when an attempt is made to release it
15720 ACPI 2.0 support in the AML Interpreter has begun and will be
15721 ongoing throughout the rest of this year. In this label, The Mod
15722 operator is implemented.
15724 Added a new data type to contain full PCI addresses named
15725 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
15726 and Function values.
15730 Enhanced the Linux version of the source code to change most
15731 capitalized ACPI type names to lowercase. For example, all
15732 instances of ACPI_STATUS are changed to acpi_status. This will
15733 result in a large diff, but the change is strictly cosmetic and
15734 aligns the CA code closer to the Linux coding standard.
15738 The interfaces to the PCI configuration space have been changed to
15739 add the PCI Segment number and to split the single 32-bit combined
15740 DeviceFunction field into two 16-bit fields. This was
15741 accomplished by moving the four values that define an address in
15742 PCI configuration space (segment, bus, device, and function) to
15743 the new ACPI_PCI_ID structure.
15745 The changes to the PCI configuration space interfaces led to a
15746 reexamination of the complete set of address space access
15747 interfaces for PCI, I/O, and Memory. The previously existing 18
15748 interfaces have proven difficult to maintain (any small change
15749 must be propagated across at least 6 interfaces) and do not easily
15750 allow for future expansion to 64 bits if necessary. Also, on some
15751 systems, it would not be appropriate to demultiplex the access
15752 width (8, 16, 32,or 64) before calling the OSL if the
15753 corresponding native OS interfaces contain a similar access width
15754 parameter. For these reasons, the 18 address space interfaces
15755 have been replaced by these 6 new ones:
15757 AcpiOsReadPciConfiguration
15758 AcpiOsWritePciConfiguration
15764 Added a new interface named AcpiOsGetRootPointer to allow the OSL
15765 to perform the platform and/or OS-specific actions necessary to
15766 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
15767 interface will simply call down to the CA core to perform the low-
15768 memory search for the table. On IA-64, the RSDP is obtained from
15769 EFI. Migrating this interface to the OSL allows the CA core to
15771 remain OS and platform independent.
15773 Added a new interface named AcpiOsSignal to provide a generic
15774 "function code and pointer" interface for various miscellaneous
15775 signals and notifications that must be made to the host OS. The
15776 first such signals are intended to support the ASL Fatal and
15777 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
15778 interface has been obsoleted.
15780 The definition of the AcpiFormatException interface has been
15781 changed to simplify its use. The caller no longer must supply a
15782 buffer to the call; A pointer to a const string is now returned
15783 directly. This allows the call to be easily used in printf
15784 statements, etc. since the caller does not have to manage a local
15788 ASL Compiler, Version X2025:
15790 The ACPI 2.0 Switch/Case/Default operators have been implemented
15791 and are fully functional. They will work with all ACPI 1.0
15792 interpreters, since the operators are simply translated to If/Else
15795 The ACPI 2.0 ElseIf operator is implemented and will also work
15796 with 1.0 interpreters, for the same reason.
15798 Implemented support for ACPI 2.0 variable-length packages. These
15799 packages have a separate opcode, and their size is determined by
15800 the interpreter at run-time.
15802 Documentation The ACPI CA Programmer Reference has been updated to
15803 reflect the new interfaces and changes to existing interfaces.
15805 ------------------------------------------
15806 Summary of changes for this label: 06_15_01
15808 ACPI CA Core Subsystem:
15810 Fixed a problem where a DWORD-accessed field within a Buffer
15811 object would get its byte address inadvertently rounded down to
15812 the nearest DWORD. Buffers are always Byte-accessible.
15814 ASL Compiler, version X2024:
15816 Fixed a problem where the Switch() operator would either fault or
15817 hang the compiler. Note however, that the AML code for this ACPI
15818 2.0 operator is not yet implemented.
15820 Compiler uses the new AcpiOsGetTimer interface to obtain compile
15823 Implementation of the CreateField operator automatically converts
15824 a reference to a named field within a resource descriptor from a
15825 byte offset to a bit offset if required.
15827 Added some missing named fields from the resource descriptor
15828 support. These are the names that are automatically created by the
15829 compiler to reference fields within a descriptor. They are only
15830 valid at compile time and are not passed through to the AML
15833 Resource descriptor named fields are now typed as Integers and
15834 subject to compile-time typechecking when used in expressions.
15836 ------------------------------------------
15837 Summary of changes for this label: 05_18_01
15839 ACPI CA Core Subsystem:
15841 Fixed a couple of problems in the Field support code where bits
15842 from adjacent fields could be returned along with the proper field
15843 bits. Restructured the field support code to improve performance,
15844 readability and maintainability.
15846 New DEBUG_PRINTP macro automatically inserts the procedure name
15847 into the output, saving hundreds of copies of procedure name
15848 strings within the source, shrinking the memory footprint of the
15849 debug version of the core subsystem.
15851 Source Code Structure:
15853 The source code directory tree was restructured to reflect the
15854 current organization of the component architecture. Some files
15855 and directories have been moved and/or renamed.
15859 Fixed leaking kacpidpc processes.
15861 Fixed queueing event data even when /proc/acpi/event is not
15864 ASL Compiler, version X2020:
15866 Memory allocation performance enhancement - over 24X compile time
15867 improvement on large ASL files. Parse nodes and namestring
15868 buffers are now allocated from a large internal compiler buffer.
15870 The temporary .SRC file is deleted unless the "-s" option is
15873 The "-d" debug output option now sends all output to the .DBG file
15874 instead of the console.
15876 "External" second parameter is now optional
15878 "ElseIf" syntax now properly allows the predicate
15880 Last operand to "Load" now recognized as a Target operand
15882 Debug object can now be used anywhere as a normal object.
15884 ResourceTemplate now returns an object of type BUFFER
15886 EISAID now returns an object of type INTEGER
15888 "Index" now works with a STRING operand
15890 "LoadTable" now accepts optional parameters
15892 "ToString" length parameter is now optional
15894 "Interrupt (ResourceType," parse error fixed.
15896 "Register" with a user-defined region space parse error fixed
15898 Escaped backslash at the end of a string ("\\") scan/parse error
15901 "Revision" is now an object of type INTEGER.
15905 ------------------------------------------
15906 Summary of changes for this label: 05_02_01
15910 /proc/acpi/event now blocks properly.
15912 Removed /proc/sys/acpi. You can still dump your DSDT from
15915 ACPI CA Core Subsystem:
15917 Fixed a problem introduced in the previous label where some of the
15918 "small" resource descriptor types were not recognized.
15920 Improved error messages for the case where an ASL Field is outside
15921 the range of the parent operation region.
15923 ASL Compiler, version X2018:
15926 Added error detection for ASL Fields that extend beyond the length
15927 of the parent operation region (only if the length of the region
15928 is known at compile time.) This includes fields that have a
15929 minimum access width that is smaller than the parent region, and
15930 individual field units that are partially or entirely beyond the
15931 extent of the parent.
15935 ------------------------------------------
15936 Summary of changes for this label: 04_27_01
15938 ACPI CA Core Subsystem:
15940 Fixed a problem where the namespace mutex could be released at the
15941 wrong time during execution of AcpiRemoveAddressSpaceHandler.
15943 Added optional thread ID output for debug traces, to simplify
15944 debugging of multiple threads. Added context switch notification
15945 when the debug code realizes that a different thread is now
15946 executing ACPI code.
15948 Some additional external data types have been prefixed with the
15949 string "ACPI_" for consistency. This may effect existing code.
15950 The data types affected are the external callback typedefs - e.g.,
15952 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
15956 Fixed an issue with the OSL semaphore implementation where a
15957 thread was waking up with an error from receiving a SIGCHLD
15960 Linux version of ACPI CA now uses the system C library for string
15961 manipulation routines instead of a local implementation.
15963 Cleaned up comments and removed TBDs.
15965 ASL Compiler, version X2017:
15967 Enhanced error detection and reporting for all file I/O
15972 Programmer Reference updated to version 1.06.
15976 ------------------------------------------
15977 Summary of changes for this label: 04_13_01
15979 ACPI CA Core Subsystem:
15981 Restructured support for BufferFields and RegionFields.
15982 BankFields support is now fully operational. All known 32-bit
15983 limitations on field sizes have been removed. Both BufferFields
15984 and (Operation) RegionFields are now supported by the same field
15987 Resource support now supports QWORD address and IO resources. The
15988 16/32/64 bit address structures and the Extended IRQ structure
15989 have been changed to properly handle Source Resource strings.
15991 A ThreadId of -1 is now used to indicate a "mutex not acquired"
15992 condition internally and must never be returned by AcpiOsThreadId.
15993 This reserved value was changed from 0 since Unix systems allow a
15998 Driver code reorganized to enhance portability
16000 Added a kernel configuration option to control ACPI_DEBUG
16002 Fixed the EC driver to honor _GLK.
16004 ASL Compiler, version X2016:
16006 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
16007 address space was set to 0, not 0x7f as it should be.
16009 ------------------------------------------
16010 Summary of changes for this label: 03_13_01
16012 ACPI CA Core Subsystem:
16014 During ACPI initialization, the _SB_._INI method is now run if
16017 Notify handler fix - notifies are deferred until the parent method
16018 completes execution. This fixes the "mutex already acquired"
16019 issue seen occasionally.
16021 Part of the "implicit conversion" rules in ACPI 2.0 have been
16022 found to cause compatibility problems with existing ASL/AML. The
16023 convert "result-to-target-type" implementation has been removed
16024 for stores to method Args and Locals. Source operand conversion
16025 is still fully implemented. Possible changes to ACPI 2.0
16026 specification pending.
16028 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
16031 Fix for compiler warnings for 64-bit compiles.
16035 /proc output aligned for easier parsing.
16037 Release-version compile problem fixed.
16039 New kernel configuration options documented in Configure.help.
16041 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
16046 Power resource driver integrated with bus manager.
16048 Fixed kernel fault during active cooling for thermal zones.
16052 The source code tree has been restructured.
16056 ------------------------------------------
16057 Summary of changes for this label: 03_02_01
16059 Linux OS Services Layer (OSL):
16061 Major revision of all Linux-specific code.
16063 Modularized all ACPI-specific drivers.
16065 Added new thermal zone and power resource drivers.
16067 Revamped /proc interface (new functionality is under /proc/acpi).
16069 New kernel configuration options.
16071 Linux known issues:
16073 New kernel configuration options not documented in Configure.help
16077 Module dependencies not currently implemented. If used, they
16078 should be loaded in this order: busmgr, power, ec, system,
16079 processor, battery, ac_adapter, button, thermal.
16081 Modules will not load if CONFIG_MODVERSION is set.
16083 IBM 600E - entering S5 may reboot instead of shutting down.
16085 IBM 600E - Sleep button may generate "Invalid <NULL> context"
16088 Some systems may fail with "execution mutex already acquired"
16091 ACPI CA Core Subsystem:
16093 Added a new OSL Interface, AcpiOsGetThreadId. This was required
16094 for the deadlock detection code. Defined to return a non-zero, 32-
16095 bit thread ID for the currently executing thread. May be a non-
16096 zero constant integer on single-thread systems.
16098 Implemented deadlock detection for internal subsystem mutexes. We
16099 may add conditional compilation for this code (debug only) later.
16101 ASL/AML Mutex object semantics are now fully supported. This
16102 includes multiple acquires/releases by owner and support for the
16104 Mutex SyncLevel parameter.
16106 A new "Force Release" mechanism automatically frees all ASL
16107 Mutexes that have been acquired but not released when a thread
16108 exits the interpreter. This forces conformance to the ACPI spec
16109 ("All mutexes must be released when an invocation exits") and
16110 prevents deadlocked ASL threads. This mechanism can be expanded
16111 (later) to monitor other resource acquisitions if OEM ASL code
16112 continues to misbehave (which it will).
16114 Several new ACPI exception codes have been added for the Mutex
16117 Recursive method calls are now allowed and supported (the ACPI
16118 spec does in fact allow recursive method calls.) The number of
16119 recursive calls is subject to the restrictions imposed by the
16120 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
16123 Implemented support for the SyncLevel parameter for control
16124 methods (ACPI 2.0 feature)
16126 Fixed a deadlock problem when multiple threads attempted to use
16129 Fixed a problem where the string length of a String package
16130 element was not always set in a package returned from
16131 AcpiEvaluateObject.
16133 Fixed a problem where the length of a String package element was
16134 not always included in the length of the overall package returned
16135 from AcpiEvaluateObject.
16137 Added external interfaces (Acpi*) to the ACPI debug memory
16138 manager. This manager keeps a list of all outstanding
16139 allocations, and can therefore detect memory leaks and attempts to
16140 free memory blocks more than once. Useful for code such as the
16141 power manager, etc. May not be appropriate for device drivers.
16142 Performance with the debug code enabled is slow.
16144 The ACPI Global Lock is now an optional hardware element.
16146 ASL Compiler Version X2015:
16148 Integrated changes to allow the compiler to be generated on
16149 multiple platforms.
16151 Linux makefile added to generate the compiler on Linux
16155 All platform-specific headers have been moved to their own
16156 subdirectory, Include/Platform.
16158 New source file added, Interpreter/ammutex.c
16160 New header file, Include/acstruct.h
16164 The programmer reference has been updated for the following new
16165 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
16167 ------------------------------------------
16168 Summary of changes for this label: 02_08_01
16170 Core ACPI CA Subsystem: Fixed a problem where an error was
16171 incorrectly returned if the return resource buffer was larger than
16172 the actual data (in the resource interfaces).
16174 References to named objects within packages are resolved to the
16176 full pathname string before packages are returned directly (via
16177 the AcpiEvaluateObject interface) or indirectly via the resource
16180 Linux OS Services Layer (OSL):
16182 Improved /proc battery interface.
16185 Added C-state debugging output and other miscellaneous fixes.
16187 ASL Compiler Version X2014:
16189 All defined method arguments can now be used as local variables,
16190 including the ones that are not actually passed in as parameters.
16191 The compiler tracks initialization of the arguments and issues an
16192 exception if they are used without prior assignment (just like
16195 The -o option now specifies a filename prefix that is used for all
16196 output files, including the AML output file. Otherwise, the
16197 default behavior is as follows: 1) the AML goes to the file
16198 specified in the DSDT. 2) all other output files use the input
16199 source filename as the base.
16201 ------------------------------------------
16202 Summary of changes for this label: 01_25_01
16204 Core ACPI CA Subsystem: Restructured the implementation of object
16205 store support within the interpreter. This includes support for
16206 the Store operator as well as any ASL operators that include a
16209 Partially implemented support for Implicit Result-to-Target
16210 conversion. This is when a result object is converted on the fly
16211 to the type of an existing target object. Completion of this
16212 support is pending further analysis of the ACPI specification
16213 concerning this matter.
16215 CPU-specific code has been removed from the subsystem (hardware
16218 New Power Management Timer functions added
16220 Linux OS Services Layer (OSL): Moved system state transition code
16221 to the core, fixed it, and modified Linux OSL accordingly.
16223 Fixed C2 and C3 latency calculations.
16226 We no longer use the compilation date for the version message on
16227 initialization, but retrieve the version from AcpiGetSystemInfo().
16229 Incorporated for fix Sony VAIO machines.
16231 Documentation: The Programmer Reference has been updated and
16235 ASL Compiler: Version X2013: Fixed a problem where the line
16236 numbering and error reporting could get out of sync in the
16237 presence of multiple include files.
16239 ------------------------------------------
16240 Summary of changes for this label: 01_15_01
16242 Core ACPI CA Subsystem:
16244 Implemented support for type conversions in the execution of the
16245 ASL Concatenate operator (The second operand is converted to
16246 match the type of the first operand before concatenation.)
16248 Support for implicit source operand conversion is partially
16249 implemented. The ASL source operand types Integer, Buffer, and
16250 String are freely interchangeable for most ASL operators and are
16251 converted by the interpreter on the fly as required. Implicit
16252 Target operand conversion (where the result is converted to the
16253 target type before storing) is not yet implemented.
16255 Support for 32-bit and 64-bit BCD integers is implemented.
16257 Problem fixed where a field read on an aligned field could cause a
16258 read past the end of the field.
16260 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
16261 does not return a value, but the caller expects one. (The ASL
16262 compiler flags this as a warning.)
16267 1. Static typechecking of all operands is implemented. This
16268 prevents the use of invalid objects (such as using a Package where
16269 an Integer is required) at compile time instead of at interpreter
16271 2. The ASL source line is printed with ALL errors and warnings.
16272 3. Bug fix for source EOF without final linefeed.
16273 4. Debug option is split into a parse trace and a namespace trace.
16274 5. Namespace output option (-n) includes initial values for
16275 integers and strings.
16276 6. Parse-only option added for quick syntax checking.
16277 7. Compiler checks for duplicate ACPI name declarations
16280 1. Relaxed typechecking to allow interchangeability between
16281 strings, integers, and buffers. These types are now converted by
16282 the interpreter at runtime.
16283 2. Compiler reports time taken by each internal subsystem in the
16287 ------------------------------------------
16288 Summary of changes for this label: 12_14_00
16292 This is the first official release of the compiler. Since the
16293 compiler requires elements of the Core Subsystem, this label
16294 synchronizes everything.
16296 ------------------------------------------
16297 Summary of changes for this label: 12_08_00
16300 Fixed a problem where named references within the ASL definition
16301 of both OperationRegions and CreateXXXFields did not work
16302 properly. The symptom was an AE_AML_OPERAND_TYPE during
16303 initialization of the region/field. This is similar (but not
16304 related internally) to the problem that was fixed in the last
16307 Implemented both 32-bit and 64-bit support for the BCD ASL
16308 functions ToBCD and FromBCD.
16310 Updated all legal headers to include "2000" in the copyright
16313 ------------------------------------------
16314 Summary of changes for this label: 12_01_00
16316 Fixed a problem where method invocations within the ASL definition
16317 of both OperationRegions and CreateXXXFields did not work
16318 properly. The symptom was an AE_AML_OPERAND_TYPE during
16319 initialization of the region/field:
16321 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
16322 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
16325 Fixed a problem where operators with more than one nested
16326 subexpression would fail. The symptoms were varied, by mostly
16327 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
16328 problem that has gone unnoticed until now.
16330 Subtract (Add (1,2), Multiply (3,4))
16332 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
16333 previous build (The prefix part of a relative path was handled
16336 Fixed a problem where Operation Region initialization failed if
16337 the operation region name was a "namepath" instead of a simple
16338 "nameseg". Symptom was an AE_NO_OPERAND error.
16340 Fixed a problem where an assignment to a local variable via the
16341 indirect RefOf mechanism only worked for the first such
16342 assignment. Subsequent assignments were ignored.
16344 ------------------------------------------
16345 Summary of changes for this label: 11_15_00
16347 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
16348 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
16349 the AML interpreter does NOT have support for the new 2.0 ASL
16350 grammar terms at this time.
16352 All ACPI hardware access is via the GAS structures in the ACPI 2.0
16355 All physical memory addresses across all platforms are now 64 bits
16356 wide. Logical address width remains dependent on the platform
16359 AcpiOsMapMemory interface changed to a 64-bit physical address.
16361 The AML interpreter integer size is now 64 bits, as per the ACPI
16364 For backwards compatibility with ACPI 1.0, ACPI tables with a
16365 revision number less than 2 use 32-bit integers only.
16367 Fixed a problem where the evaluation of OpRegion operands did not
16368 always resolve them to numbers properly.
16370 ------------------------------------------
16371 Summary of changes for this label: 10_20_00
16373 Fix for CBN_._STA issue. This fix will allow correct access to
16374 CBN_ OpRegions when the _STA returns 0x8.
16376 Support to convert ACPI constants (Ones, Zeros, One) to actual
16377 values before a package object is returned
16379 Fix for method call as predicate to if/while construct causing
16380 incorrect if/while behavior
16382 Fix for Else block package lengths sometimes calculated wrong (if
16385 Fix for Processor object length field, was always zero
16387 Table load abort if FACP sanity check fails
16389 Fix for problem with Scope(name) if name already exists
16391 Warning emitted if a named object referenced cannot be found
16392 (resolved) during method execution.
16398 ------------------------------------------
16399 Summary of changes for this label: 9_29_00
16401 New table initialization interfaces: AcpiInitializeSubsystem no
16402 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
16403 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
16404 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
16407 Note: These interface changes require changes to all existing OSDs
16409 The PCI_Config default address space handler is always installed
16410 at the root namespace object.
16412 -------------------------------------------
16413 Summary of changes for this label: 09_15_00
16415 The new initialization architecture is implemented. New
16416 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
16417 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
16419 (Namespace is automatically loaded when a table is loaded)
16421 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
16422 52 bytes to 32 bytes. There is usually one of these for every
16423 namespace object, so the memory savings is significant.
16425 Implemented just-in-time evaluation of the CreateField operators.
16427 Bug fixes for IA-64 support have been integrated.
16429 Additional code review comments have been implemented
16431 The so-called "third pass parse" has been replaced by a final walk
16432 through the namespace to initialize all operation regions (address
16433 spaces) and fields that have not yet been initialized during the
16434 execution of the various _INI and REG methods.
16436 New file - namespace/nsinit.c
16438 -------------------------------------------
16439 Summary of changes for this label: 09_01_00
16441 Namespace manager data structures have been reworked to change the
16442 primary object from a table to a single object. This has
16443 resulted in dynamic memory savings of 3X within the namespace and
16444 2X overall in the ACPI CA subsystem.
16446 Fixed problem where the call to AcpiEvFindPciRootBuses was
16447 inadvertently left commented out.
16449 Reduced the warning count when generating the source with the GCC
16452 Revision numbers added to each module header showing the
16453 SourceSafe version of the file. Please refer to this version
16454 number when giving us feedback or comments on individual modules.
16456 The main object types within the subsystem have been renamed to
16457 clarify their purpose:
16459 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
16460 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
16461 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
16463 NOTE: no changes to the initialization sequence are included in
16466 -------------------------------------------
16467 Summary of changes for this label: 08_23_00
16469 Fixed problem where TerminateControlMethod was being called
16470 multiple times per method
16472 Fixed debugger problem where single stepping caused a semaphore to
16475 Improved performance through additional parse object caching -
16476 added ACPI_EXTENDED_OP type
16478 -------------------------------------------
16479 Summary of changes for this label: 08_10_00
16481 Parser/Interpreter integration: Eliminated the creation of
16482 complete parse trees for ACPI tables and control methods.
16483 Instead, parse subtrees are created and then deleted as soon as
16484 they are processed (Either entered into the namespace or executed
16485 by the interpreter). This reduces the use of dynamic kernel
16486 memory significantly. (about 10X)
16488 Exception codes broken into classes and renumbered. Be sure to
16489 recompile all code that includes acexcep.h. Hopefully we won't
16490 have to renumber the codes again now that they are split into
16491 classes (environment, programmer, AML code, ACPI table, and
16494 Fixed some additional alignment issues in the Resource Manager
16497 Implemented semaphore tracking in the AcpiExec utility, and fixed
16498 several places where mutexes/semaphores were being unlocked
16499 without a corresponding lock operation. There are no known
16500 semaphore or mutex "leaks" at this time.
16502 Fixed the case where an ASL Return operator is used to return an
16505 -------------------------------------------
16506 Summary of changes for this label: 07_28_00
16508 Fixed a problem with the way addresses were calculated in
16509 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
16510 manifested itself when a Field was created with WordAccess or
16511 DwordAccess, but the field unit defined within the Field was less
16513 than a Word or Dword.
16515 Fixed a problem in AmlDumpOperands() module's loop to pull
16516 operands off of the operand stack to display information. The
16517 problem manifested itself as a TLB error on 64-bit systems when
16518 accessing an operand stack with two or more operands.
16520 Fixed a problem with the PCI configuration space handlers where
16521 context was getting confused between accesses. This required a
16522 change to the generic address space handler and address space
16523 setup definitions. Handlers now get both a global handler context
16524 (this is the one passed in by the user when executing
16525 AcpiInstallAddressSpaceHandler() and a specific region context
16526 that is unique to each region (For example, the _ADR, _SEG and
16527 _BBN values associated with a specific region). The generic
16528 function definitions have changed to the following:
16530 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
16531 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
16532 *HandlerContext, // This used to be void *Context void
16533 *RegionContext); // This is an additional parameter
16535 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
16536 RegionHandle, UINT32 Function, void *HandlerContext, void
16537 **RegionContext); // This used to be **ReturnContext
16539 -------------------------------------------
16540 Summary of changes for this label: 07_21_00
16542 Major file consolidation and rename. All files within the
16543 interpreter have been renamed as well as most header files. This
16544 was done to prevent collisions with existing files in the host
16545 OSs -- filenames such as "config.h" and "global.h" seem to be
16546 quite common. The VC project files have been updated. All
16547 makefiles will require modification.
16549 The parser/interpreter integration continues in Phase 5 with the
16550 implementation of a complete 2-pass parse (the AML is parsed
16551 twice) for each table; This avoids the construction of a huge
16552 parse tree and therefore reduces the amount of dynamic memory
16553 required by the subsystem. Greater use of the parse object cache
16554 means that performance is unaffected.
16556 Many comments from the two code reviews have been rolled in.
16558 The 64-bit alignment support is complete.
16560 -------------------------------------------
16561 Summary of changes for this label: 06_30_00
16563 With a nod and a tip of the hat to the technology of yesteryear,
16564 we've added support in the source code for 80 column output
16565 devices. The code is now mostly constrained to 80 columns or
16566 less to support environments and editors that 1) cannot display
16567 or print more than 80 characters on a single line, and 2) cannot
16568 disable line wrapping.
16570 A major restructuring of the namespace data structure has been
16571 completed. The result is 1) cleaner and more
16572 understandable/maintainable code, and 2) a significant reduction
16573 in the dynamic memory requirement for each named ACPI object
16576 -------------------------------------------
16577 Summary of changes for this label: 06_23_00
16579 Linux support has been added. In order to obtain approval to get
16580 the ACPI CA subsystem into the Linux kernel, we've had to make
16581 quite a few changes to the base subsystem that will affect all
16582 users (all the changes are generic and OS- independent). The
16583 effects of these global changes have been somewhat far reaching.
16584 Files have been merged and/or renamed and interfaces have been
16585 renamed. The major changes are described below.
16587 Osd* interfaces renamed to AcpiOs* to eliminate namespace
16588 pollution/confusion within our target kernels. All OSD
16589 interfaces must be modified to match the new naming convention.
16591 Files merged across the subsystem. A number of the smaller source
16592 and header files have been merged to reduce the file count and
16593 increase the density of the existing files. There are too many
16594 to list here. In general, makefiles that call out individual
16595 files will require rebuilding.
16597 Interpreter files renamed. All interpreter files now have the
16598 prefix am* instead of ie* and is*.
16600 Header files renamed: The acapi.h file is now acpixf.h. The
16601 acpiosd.h file is now acpiosxf.h. We are removing references to
16602 the acronym "API" since it is somewhat windowsy. The new name is
16603 "external interface" or xface or xf in the filenames.j
16606 All manifest constants have been forced to upper case (some were
16607 mixed case.) Also, the string "ACPI_" has been prepended to many
16608 (not all) of the constants, typedefs, and structs.
16610 The globals "DebugLevel" and "DebugLayer" have been renamed
16611 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
16613 All other globals within the subsystem are now prefixed with
16614 "AcpiGbl_" Internal procedures within the subsystem are now
16615 prefixed with "Acpi" (with only a few exceptions). The original
16616 two-letter abbreviation for the subcomponent remains after "Acpi"
16617 - for example, CmCallocate became AcpiCmCallocate.
16619 Added a source code translation/conversion utility. Used to
16620 generate the Linux source code, it can be modified to generate
16621 other types of source as well. Can also be used to cleanup
16622 existing source by removing extraneous spaces and blank lines.
16623 Found in tools/acpisrc/*
16625 OsdUnMapMemory was renamed to OsdUnmapMemory and then
16626 AcpiOsUnmapMemory. (UnMap became Unmap).
16628 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
16629 When set to one, this indicates that the caller wants to use the
16631 semaphore as a mutex, not a counting semaphore. ACPI CA uses
16632 both types. However, implementers of this call may want to use
16633 different OS primitives depending on the type of semaphore
16634 requested. For example, some operating systems provide separate
16636 "mutex" and "semaphore" interfaces - where the mutex interface is
16637 much faster because it doesn't have all the overhead of a full
16638 semaphore implementation.
16640 Fixed a deadlock problem where a method that accesses the PCI
16641 address space can block forever if it is the first access to the
16644 -------------------------------------------
16645 Summary of changes for this label: 06_02_00
16647 Support for environments that cannot handle unaligned data
16648 accesses (e.g. firmware and OS environments devoid of alignment
16649 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
16650 been added (via configurable macros) in these three areas: -
16651 Transfer of data from the raw AML byte stream is done via byte
16652 moves instead of word/dword/qword moves. - External objects are
16653 aligned within the user buffer, including package elements (sub-
16654 objects). - Conversion of name strings to UINT32 Acpi Names is now
16657 The Store operator was modified to mimic Microsoft's
16658 implementation when storing to a Buffer Field.
16660 Added a check of the BM_STS bit before entering C3.
16662 The methods subdirectory has been obsoleted and removed. A new
16663 file, cmeval.c subsumes the functionality.
16665 A 16-bit (DOS) version of AcpiExec has been developed. The
16666 makefile is under the acpiexec directory.