1 ----------------------------------------
2 09 May 2019. Summary of changes for version 20190509:
5 1) ACPICA kernel-resident subsystem:
7 Revert commit 6c43e1a ("ACPICA: Clear status of GPEs before enabling
8 them") that causes problems with Thunderbolt controllers to occur if a
9 dock device is connected at init time (the xhci_hcd and thunderbolt
10 modules crash which prevents peripherals connected through them from
11 working). Commit 6c43e1a effectively causes commit ecc1165b8b74 ("ACPICA:
12 Dispatch active GPEs at init time") to get undone, so the problem
13 addressed by commit ecc1165b8b74 appears again as a result of it.
16 2) iASL Compiler/Disassembler and ACPICA tools:
18 Reverted iASL: Additional forward reference detection. This change
19 reverts forward reference detection for field declarations. The feature
20 unintentionally emitted AML bytecode with incorrect package lengths for
21 some ASL code related to Fields and OperationRegions. This malformed AML
22 can cause systems to crash
23 during boot. The malformed AML bytecode is emitted in iASL version
24 20190329 and 20190405.
26 iASL: improve forward reference detection. This change improves forward
27 reference detection for named objects inside of scopes. If a parse object
28 has the OP_NOT_FOUND_DURING_LOAD set, it means that Op is a reference to
29 a named object that is declared later in the AML bytecode. This is
30 allowed if the reference is inside of a method and the declaration is
31 outside of a method like so:
42 However, if the declaration and reference are both in the same method or
43 outside any methods, this is a forward reference and should be marked as
44 an error because it would result in runtime errors.
48 Name (BUFF, Buffer (NUM0) {}) // Forward reference
54 Name (NUM1, 0x1) // Forward reference
59 iASL: Implemented additional buffer overflow analysis for BufferField
60 declarations. Check if a buffer index argument to a create buffer field
61 operation is beyond the end of the target buffer.
63 This affects these AML operators:
66 AML_CREATE_BIT_FIELD_OP
67 AML_CREATE_BYTE_FIELD_OP
68 AML_CREATE_WORD_FIELD_OP
69 AML_CREATE_DWORD_FIELD_OP
70 AML_CREATE_QWORD_FIELD_OP
72 There are three conditions that must be satisfied in order to allow this
73 validation at compile time:
75 1) The length of the target buffer must be an integer constant
76 2) The index specified in the create* must be an integer constant
77 3) For CreateField, the bit length argument must be non-zero.
80 Name (BUF1, Buffer() {1,2})
81 CreateField (BUF1, 7, 9, CF03) // 3: ERR
83 dsdt.asl 14: CreateField (BUF1, 7, 9, CF03) // 3: ERR
84 Error 6165 - ^ Buffer index beyond end of
88 ----------------------------------------
89 05 April 2019. Summary of changes for version 20190405:
92 1) ACPICA kernel-resident subsystem:
94 Event Manager: History: Commit 18996f2db918 ("ACPICA: Events: Stop
95 unconditionally clearing ACPI IRQs during suspend/resume") was added
96 earlier to stop clearing of event status bits unconditionally on suspend
97 and resume paths. Though this change fixed an issue on suspend path, it
98 introduced regressions on several resume paths. In the case of S0ix,
99 events are enabled as part of device suspend path. If status bits for the
100 events are set when they are enabled, it could result in premature wake
101 from S0ix. If status is cleared for any event that is being enabled so
102 that any stale events are cleared out. In case of S0ix, events are
103 enabled as part of device suspend path. If status bits for the events are
104 set when they are enabled, it could result in premature wake from S0ix.
106 This change ensures that status is cleared for any event that is being
107 enabled so that any stale events are cleared out.
110 2) iASL Compiler/Disassembler and ACPICA tools:
112 iASL: Implemented an enhanced multiple file compilation that combines
113 named objects from all input files to a single namespace. With this
114 feature, any unresolved external declarations as well as duplicate named
115 object declarations can be detected during compilation rather than
116 generating errors much later at runtime. The following commands are
117 examples that utilize this feature:
118 iasl dsdt.asl ssdt.asl
119 iasl dsdt.asl ssdt1.asl ssdt2.asl
120 iasl dsdt.asl ssdt*.asl
122 ----------------------------------------
123 29 March 2019. Summary of changes for version 20190329:
126 1) ACPICA kernel-resident subsystem:
128 Namespace support: Remove the address nodes from global list after method
129 termination. The global address list contains pointers to namespace nodes
130 that represent Operation Regions. This change properly removes Operation
131 Region namespace nodes that are declared dynamically during method
134 Linux: Use a different debug default than ACPICA. There was a divergence
135 between Linux and the ACPICA codebases. In order to resolve this
136 divergence, Linux now declares its own debug default in aclinux.h
138 Renamed some internal macros to improve code understanding and
139 maintenance. The macros below all operate on single 4-character ACPI
140 NameSegs, not generic strings (old -> new):
141 ACPI_NAME_SIZE -> ACPI_NAMESEG_SIZE
142 ACPI_COMPARE_NAME -> ACPI_COMPARE_NAMESEG
143 ACPI_MOVE_NAME -> ACPI_COPY_NAMESEG
145 Fix for missing comma in array declaration for the AcpiGbl_GenericNotify
148 Test suite: Update makefiles, add PCC operation region support
151 2) iASL Compiler/Disassembler and Tools:
153 iASL: Implemented additional illegal forward reference detection. Now
154 detect and emit an error upon detection of a forward reference from a
155 Field to an Operation Region. This will fail at runtime if allowed to
158 AcpiExec: Add an address list check for dynamic Operation Regions. This
159 feature performs a sanity test for each node the global address list.
160 This is done in order to ensure that all dynamic operation regions are
161 properly removed from the global address list and no dangling pointers
164 Disassembler: Improved generation of resource pathnames. This change
165 improves the code that generates resource descriptor and resource tag
166 pathnames. The original code used a bunch of str* C library functions
167 that caused warnings on some compilers.
169 iASL: Removed some uses of strncpy and replaced with memmove. The strncpy
170 function can overwrite buffers if the calling code is not very careful.
171 In the case of generating a module/table header, use of memmove is a
172 better implementation.
175 3) Status of new features that have not been completed at this time:
177 iASL: Implementing an enhanced multiple file compilation into a single
178 namespace feature (Status): This feature will be released soon, and
179 allows multiple ASL files to be compiled into the same single namespace.
180 By doing so, any unresolved external declarations as well as duplicate
181 named object declarations can be detected during compilation (rather than
182 later during runtime). The following commands are examples that utilize
184 iasl dsdt.asl ssdt.asl
185 iasl dsdt.asl ssdt1.asl ssdt2.asl
186 iasl dsdt.asl ssdt*.asl
188 ASL tutorial status: Feedback is being gathered internally and the
189 current plan is to publish this tutorial on the ACPICA website after a
190 final review by a tech writer.
192 ----------------------------------------
193 15 February 2019. Summary of changes for version 20190215:
196 0) Support for ACPI specification version 6.3:
198 Add PCC operation region support for the AML interpreter. This adds PCC
199 operation region support in the AML interpreter and a default handler for
200 acpiexec. The change also renames the PCC region address space keyword to
203 Support for new predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG.
204 These methods provide OSPM with health information and device boot
207 PDTT: Add TriggerOrder to the PCC Identifier structure. The field value
208 defines if the trigger needs to be invoked by OSPM before or at the end
209 of kernel crash dump processing/handling operation.
211 SRAT: Add Generic Affinity Structure subtable. This subtable in the SRAT
212 is used for describing devices such as heterogeneous processors,
213 accelerators, GPUs, and IO devices with integrated compute or DMA
216 MADT: Add support for statistical profiling in GICC. Statistical
217 profiling extension (SPE) is an architecture-specific feature for ARM.
219 MADT: Add online capable flag. If this bit is set, system hardware
220 supports enabling this processor during OS runtime.
222 New Error Disconnect Recover Notification value. There are a number of
223 scenarios where system Firmware in collaboration with hardware may
224 disconnect one or more devices from the rest of the system for purposes
225 of error containment. Firmware can use this new notification value to
226 alert OSPM of such a removal.
228 PPTT: New additional fields in Processor Structure Flags. These flags
229 provide more information about processor topology.
231 NFIT/Disassembler: Change a field name from "Address Range" to "Region
234 HMAT updates: make several existing fields to be reserved as well as
235 rename subtable 0 to "memory proximity domain attributes".
237 GTDT: Add support for new GTDT Revision 3. This revision adds information
240 iASL: Update the HMAT example template for new fields.
242 iASL: Add support for the new revision of the GTDT (Rev 3).
245 1) ACPICA kernel-resident subsystem:
247 AML Parser: fix the main AML parse loop to correctly skip erroneous
248 extended opcodes. AML opcodes come in two lengths: 1-byte opcodes and 2-
249 byte extended opcodes. If an error occurs during an AML table load, the
250 AML parser will continue loading the table by skipping the offending
251 opcode. This implements a "load table at any cost" philosophy.
254 2) iASL Compiler/Disassembler and Tools:
256 iASL: Add checks for illegal object references, such as a reference
257 outside of method to an object within a method. Such an object is only
260 iASL: Emit error for creation of a zero-length operation region. Such a
261 region is rather pointless. If encountered, a runtime error is also
262 implemented in the interpeter.
264 Debugger: Fix a possible fault with the "test objects" command.
266 iASL: Makefile: support parent directory filenames containing embedded
269 iASL: Update the TPM2 template to revision 4.
271 iASL: Add the ability to report specific warnings or remarks as errors.
273 Disassembler: Disassemble OEMx tables as actual AML byte code.
274 Previously, these tables were treated as "unknown table".
276 iASL: Add definition and disassembly for TPM2 revision 3.
278 iASL: Add support for TPM2 rev 3 compilation.
281 ----------------------------------------
282 08 January 2019. Summary of changes for version 20190108:
285 1) ACPICA kernel-resident subsystem:
287 Updated all copyrights to 2019. This affects all source code modules.
290 2) iASL Compiler/Disassembler and Tools:
292 ASL test suite (ASLTS): Updated all copyrights to 2019.
294 Tools: Updated all signon copyrights to 2019.
296 AcpiExec: Added a new option to dump extra information concerning any
297 memory leaks detected by the internal object/cache tracking mechanism. -
300 iASL: Updated the table template for the TPM2 table to the newest version
301 of the table (Revision 4)
304 ----------------------------------------
305 13 December 2018. Summary of changes for version 20181213:
308 1) ACPICA Kernel-resident Subsystem:
310 Fixed some buffer length issues with the GenericSerialBus, related to two
311 of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes,
312 which are rarely seen in the field. For these, the LEN field of the ASL
313 buffer is now ignored. Hans de Goede
315 Implemented a new object evaluation trace mechanism for control methods
316 and data objects. This includes nested control methods. It is
317 particularly useful for examining the ACPI execution during system
318 initialization since the output is relatively terse. The flag below
319 enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
320 #define ACPI_LV_EVALUATION 0x00080000
323 Enter evaluation : _SB.PCI0._INI (Method)
324 Exit evaluation : _SB.PCI0._INI
325 Enter evaluation : _OSI (Method)
326 Exit evaluation : _OSI
327 Enter evaluation : _SB.PCI0.TEST (Method)
328 Nested method call : _SB.PCI0.NST1
329 Exit nested method : _SB.PCI0.NST1
330 Exit evaluation : _SB.PCI0.TEST
332 Added two recently-defined _OSI strings. See
333 https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
338 Update for buffer-to-string conversions via the ToHexString ASL operator.
339 A "0x" is now prepended to each of the hex values in the output string.
340 This provides compatibility with other ACPI implementations. The ACPI
341 specification is somewhat vague on this issue.
342 Example output string after conversion:
343 "0x01,0x02,0x03,0x04,0x05,0x06"
345 Return a run-time error for TermArg expressions within individual package
346 elements. Although this is technically supported by the ASL grammar,
347 other ACPI implementations do not support this either. Also, this fixes a
348 fault if this type of construct is ever encountered (it never has been).
351 2) iASL Compiler/Disassembler and Tools:
353 iASL: Implemented a new compile option (-ww) that will promote individual
354 warnings and remarks to errors. This is intended to enhance the firmware
357 AcpiExec: Implemented a new command-line option (-eo) to support the new
358 object evaluation trace mechanism described above.
360 Disassembler: Added support to disassemble OEMx tables as AML/ASL tables
361 instead of a "unknown table" message.
363 AcpiHelp: Improved support for the "special" predefined names such as
364 _Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be
365 used for "xx" and "x".
367 ----------------------------------------
368 31 October 2018. Summary of changes for version 20181031:
371 An Operation Region regression was fixed by properly adding address
372 ranges to a global list during initialization. This allows OS to
373 accurately check for overlapping regions between native devices (such as
374 PCI) and Operation regions as well as checking for region conflicts
375 between two Operation Regions.
377 Added support for the 2-byte extended opcodes in the code/feature that
378 attempts to continue parsing during the table load phase. Skip parsing
379 Device declarations (and other extended opcodes) when an error occurs
380 during parsing. Previously, only single-byte opcodes were supported.
382 Cleanup: Simplified the module-level code support by eliminating a
383 useless global variable (AcpiGbl_GroupModuleLeveCode).
386 2) iASL Compiler/Disassembler and Tools:
388 iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE
389 could cause a fault in the preprocessor. This was an inadvertent side-
390 effect from moving more allocations/frees to the local cache/memory
393 iASL: Enhanced error detection by validating that all NameSeg elements
394 within a NamePatch actually exist. The previous behavior was spotty at
395 best, and such errors could be improperly ignored at compiler time (never
396 at runtime, however. There are two new error messages, as shown in the
399 dsdt.asl 33: CreateByteField (TTTT.BXXX, 1, CBF1)
400 Error 6161 - ^ One or more objects within
401 the Pathname do not exist (TTTT.BXXX)
403 dsdt.asl 34: CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
404 Error 6160 - One or more prefix Scopes do not exist ^
407 iASL: Disassembler/table-compiler: Added support for the static data
408 table TPM2 revision 3 (an older version of TPM2). The support has been
409 added for the compiler and the disassembler.
411 Fixed compilation of DOS format data table file on Unix/Linux systems.
412 iASL now properly detects line continuations (\) for DOS format data
413 table definition language files on when executing on Unix/Linux.
415 ----------------------------------------
416 03 October 2018. Summary of changes for version 20181003:
419 2) iASL Compiler/Disassembler and Tools:
421 Fixed a regression introduced in version 20180927 that could cause the
422 compiler to fault, especially with NamePaths containing one or more
423 carats (^). Such as: ^^_SB_PCI0
425 Added a new remark for the Sleep() operator when the sleep time operand
426 is larger than one second. This is a very long time for the ASL/BIOS code
427 and may not be what was intended by the ASL writer.
429 ----------------------------------------
430 27 September 2018. Summary of changes for version 20180927:
433 1) ACPICA kernel-resident subsystem:
435 Updated the GPE support to clear the status of all ACPI events when
436 entering any/all sleep states in order to avoid premature wakeups. In
437 theory, this may cause some wakeup events to be missed, but the
438 likelihood of this is small. This change restores the original behavior
439 of the ACPICA code in order to fix a regression seen from the previous
440 "Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
441 This regression could cause some systems to incorrectly wake immediately.
443 Updated the execution of the _REG methods during initialization and
444 namespace loading to bring the behavior into closer conformance to the
445 ACPI specification and other ACPI implementations:
447 From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
448 "Control methods must assume all operation regions are inaccessible
449 until the _REG(RegionSpace, 1) method is executed"
451 "The exceptions to this rule are:
452 1. OSPM must guarantee that the following operation regions are always
454 SystemIO operation regions.
455 SystemMemory operation regions when accessing memory returned by the
456 System Address Map reporting interfaces."
458 Since the state of both the SystemIO and SystemMemory address spaces are
459 defined by the specification to never change, this ACPICA change ensures
460 that now _REG is never called on them. This solves some problems seen in
461 the field and provides compatibility with other ACPI implementations. An
462 update to the upcoming new version of the ACPI specification will help
463 clarify this behavior.
465 Updated the implementation of support for the Generic Serial Bus. For the
466 "bidirectional" protocols, the internal implementation now automatically
467 creates a return data buffer of the maximum size (255). This handles the
468 worst-case for data that is returned from the serial bus handler, and
469 fixes some problems seen in the field. This new buffer is directly
470 returned to the ASL. As such, there is no true "bidirectional" buffer,
471 which matches the ACPI specification. This is the reason for the "double
472 store" seen in the example ASL code in the specification, shown below:
474 Word Process Call (AttribProcessCall):
475 OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
476 Field(TOP1, BufferAcc, NoLock, Preserve)
478 FLD1, 8, // Virtual register at command value 1.
481 Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
483 CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
485 Store(0x5416, DATA) // Save 0x5416 into the data buffer
486 Store(Store(BUFF, FLD1), BUFF) // Invoke a write/read Process Call
488 // This is the "double store". The write to
489 // FLD1 returns a new buffer, which is stored
490 // back into BUFF with the second Store.
493 2) iASL Compiler/Disassembler and Tools:
495 iASL: Implemented detection of extraneous/redundant uses of the Offset()
496 operator within a Field Unit list. A remark is now issued for these. For
497 example, the first two of the Offset() operators below are extraneous.
498 Because both the compiler and the interpreter track the offsets
499 automatically, these Offsets simply refer to the current offset and are
500 unnecessary. Note, when optimization is enabled, the iASL compiler will
501 in fact remove the redundant Offset operators and will not emit any AML
504 OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
507 Offset (0), // Never needed
509 Offset (4), // Redundant, offset is already 4 (bytes)
511 Offset (64), // OK use of Offset.
514 dsdt.asl 14: Offset (0),
515 Remark 2158 - ^ Unnecessary/redundant use of Offset
518 dsdt.asl 16: Offset (4),
519 Remark 2158 - ^ Unnecessary/redundant use of Offset
522 ----------------------------------------
523 10 August 2018. Summary of changes for version 20180810:
526 1) ACPICA kernel-resident subsystem:
528 Initial ACPI table loading: Attempt to continue loading ACPI tables
529 regardless of malformed AML. Since migrating table initialization to the
530 new module-level code support, the AML interpreter rejected tables upon
531 any ACPI error encountered during table load. This is a problem because
532 non-serious ACPI errors during table load do not necessarily mean that
533 the entire definition block (DSDT or SSDT) is invalid. This change
534 improves the table loading by ignoring some types of errors that can be
535 generated by incorrect AML. This can range from object type errors, scope
536 errors, and index errors.
538 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
539 during suspend/resume. The status of ACPI events is no longer cleared
540 when entering the ACPI S5 system state (power off) which caused some
541 systems to power up immediately after turning off power in certain
542 situations. This was a functional regression. It was fixed by clearing
543 the status of all ACPI events again when entering S5 (for system-wide
544 suspend or hibernation the clearing of the status of all events is not
545 desirable, as it might cause the kernel to miss wakeup events sometimes).
549 2) iASL Compiler/Disassembler and Tools:
551 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
552 elements listed in the initialization file were previously initialized
553 after the table load and before executing module-level code blocks.
554 Recent changes in the module-level code support means that the table load
555 becomes a large control method execution. If fields are used within
556 module-level code and we are executing with the -fi option, the
557 initialization values were used to initialize the namespace object(s)
558 only after the table was finished loading. This change Provides an early
559 initialization of objects specified in the initialization file so that
560 field unit values are populated during the table load (not after the
563 AcpiExec: Fixed a small memory leak regression that could result in
564 warnings during exit of the utility. These warnings were similar to
566 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
567 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
569 ----------------------------------------
570 29 June 2018. Summary of changes for version 20180629:
573 1) iASL Compiler/Disassembler and Tools:
575 iASL: Fixed a regression related to the use of the ASL External
576 statement. Error checking for the use of the External() statement has
577 been relaxed. Previously, a restriction on the use of External meant that
578 the referenced named object was required to be defined in a different
579 table (an SSDT). Thus it would be an error to declare an object as an
580 external and then define the same named object in the same table. For
582 DefinitionBlock (...)
585 Device (DEV1){...} // This was an error
587 However, this behavior has caused regressions in some existing ASL code,
588 because there is code that depends on named objects and externals (with
589 the same name) being declared in the same table. This change will allow
590 the ASL code above to compile without errors or warnings.
592 iASL: Implemented ASL language extensions for four operators to make some
593 of their arguments optional instead of required:
594 1) Field (RegionName, AccessType, LockRule, UpdateRule)
595 2) BankField (RegionName, BankName, BankValue,
596 AccessType, LockRule, UpdateRule)
597 3) IndexField (IndexName, DataName,
598 AccessType, LockRule, UpdateRule)
599 For the Field operators above, the AccessType, LockRule, and UpdateRule
600 are now optional arguments. The default values are:
604 4) Mutex (MutexName, SyncLevel)
605 For this operator, the SyncLevel argument is now optional. This argument
606 is rarely used in any meaningful way by ASL code, and thus it makes sense
607 to make it optional. The default value is:
610 iASL: Attempted use of the ASL Unload() operator now results in the
612 "Unload is not supported by all operating systems"
613 This is in fact very true, and the Unload operator may be completely
614 deprecated in the near future.
616 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
617 file. Recent changes in the ACPICA module-level code support altered the
618 table load/initialization sequence . This means that the table load has
619 become a large method execution of the table itself. If Operation Region
620 Fields are used within any module-level code and the -fi option was
621 specified, the initialization values were populated only after the table
622 had completely finished loading (and thus the module-level code had
623 already been executed). This change moves the initialization of objects
624 listed in the initialization file to before the table is executed as a
625 method. Field unit values are now initialized before the table execution
628 ----------------------------------------
629 31 May 2018. Summary of changes for version 20180531:
632 1) ACPICA kernel-resident Subsystem:
634 Implemented additional support to help ensure that a DSDT or SSDT is
635 fully loaded even if errors are incurred during the load. The majority of
636 the problems that are seen is the failure of individual AML operators
637 that occur during execution of any module-level code (MLC) existing in
638 the table. This support adds a mechanism to abort the current ASL
639 statement (AML opcode), emit an error message, and to simply move on to
640 the next opcode -- instead of aborting the entire table load. This is
641 different than the execution of a control method where the entire method
642 is aborted upon any error. The goal is to perform a very "best effort" to
643 load the ACPI tables. The most common MLC errors that have been seen in
644 the field are direct references to unresolved ASL/AML symbols (referenced
645 directly without the use of the CondRefOf operator to validate the
646 symbol). This new ACPICA behavior is now compatible with other ACPI
649 Interpreter: The Unload AML operator is no longer supported for the
650 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
651 1) A correct implementation on at least some hosts may not be possible.
652 2) Other ACPI implementations do not correctly/fully support it.
653 3) It requires host device driver support which is not known to exist.
654 (To properly support namespace unload out from underneath.)
655 4) This AML operator has never been seen in the field.
657 Parser: Added a debug option to dump AML parse sub-trees as they are
658 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
661 Debugger: Reduced the verbosity for errors incurred during table load and
662 module-level code execution.
664 Completed an investigation into adding a namespace node "owner list"
665 instead of the current "owner ID" associated with namespace nodes. This
666 list would link together all nodes that are owned by an individual
667 control method. The purpose would be to enhance control method execution
668 by speeding up cleanup during method exit (all namespace nodes created by
669 a method are deleted upon method termination.) Currently, the entire
670 namespace must be searched for matching owner IDs if (and only if) the
671 method creates named objects outside of the local scope. However, by far
672 the most common case is that methods create objects locally, not outside
673 the method scope. There is already an ACPICA optimization in place that
674 only searches the entire namespace in the rare case of a method creating
675 objects elsewhere in the namespace. Therefore, it is felt that the
676 overhead of adding an additional pointer to each namespace node to
677 implement the owner list makes this feature unnecessary.
680 2) iASL Compiler/Disassembler and Tools:
682 iASL, Disassembler, and Template generator: Implemented support for
683 Revision D of the IORT table. Adds a new subtable that is used to specify
684 SMMUv3 PMCGs. rmurphy-arm.
686 Disassembler: Restored correct table header validation for the "special"
687 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
688 table header and must be special-cased. This was a regression that has
689 been present for apparently a long time.
691 AcpiExec: Reduced verbosity of the local exception handler implemented
692 within acpiexec. This handler is invoked by ACPICA upon any exceptions
693 generated during control method execution. A new option was added: -vh
694 restores the original verbosity level if desired.
696 AcpiExec: Changed the default base from decimal to hex for the -x option
697 (set debug level). This simplifies the use of this option and matches the
698 behavior of the corresponding iASL -x option.
700 AcpiExec: Restored a force-exit on multiple control-c (sigint)
701 interrupts. This allows program termination even if other issues cause
702 the control-c to fail.
704 ASL test suite (ASLTS): Added tests for the recently implemented package
705 element resolution mechanism that allows forward references to named
706 objects from individual package elements (this mechanism provides
707 compatibility with other ACPI implementations.)
710 ----------------------------------------
711 8 May 2018. Summary of changes for version 20180508:
714 1) ACPICA kernel-resident subsystem:
716 Completed the new (recently deployed) package resolution mechanism for
717 the Load and LoadTable ASL/AML operators. This fixes a regression that
718 was introduced in version 20180209 that could result in an
719 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
720 (SSDT) that contains package objects.
723 2) iASL Compiler/Disassembler and Tools:
725 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
726 1 MB. This change allows for table offsets within the acpidump file to be
727 up to 8 characters. These changes are backwards compatible with existing
731 ----------------------------------------
732 27 April 2018. Summary of changes for version 20180427:
735 1) ACPICA kernel-resident subsystem:
737 Debugger: Added support for Package objects in the "Test Objects"
738 command. This command walks the entire namespace and evaluates all named
739 data objects (Integers, Strings, Buffers, and now Packages).
741 Improved error messages for the namespace root node. Originally, the root
742 was referred to by the confusing string "\___". This has been replaced by
743 "Namespace Root" for clarification.
745 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
746 Ian King <colin.king@canonical.com>.
749 2) iASL Compiler/Disassembler and Tools:
751 iASL: Implemented support to detect and flag illegal forward references.
752 For compatibility with other ACPI implementations, these references are
753 now illegal at the root level of the DSDT or SSDTs. Forward references
754 have always been illegal within control methods. This change should not
755 affect existing ASL/AML code because of the fact that these references
756 have always been illegal in the other ACPI implementation.
758 iASL: Added error messages for the case where a table OEM ID and OEM
759 TABLE ID strings are longer than the ACPI-defined length. Previously,
760 these strings were simply silently truncated.
762 iASL: Enhanced the -tc option (which creates an AML hex file in C,
763 suitable for import into a firmware project):
764 1) Create a unique name for the table, to simplify use of multiple
766 2) Add a protection #ifdef in the file, similar to a .h header file.
767 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
770 AcpiExec: Added a new option, -df, to disable the local fault handler.
771 This is useful during debugging, where it may be desired to drop into a
774 ----------------------------------------
775 13 March 2018. Summary of changes for version 20180313:
778 1) ACPICA kernel-resident subsystem:
780 Implemented various improvements to the GPE support:
782 1) Dispatch all active GPEs at initialization time so that no GPEs are
784 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
785 before devices are enumerated.
786 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
788 4) Add parallel GPE handling to eliminate the possibility of dispatching
790 5) Dispatch any pending GPEs after enabling for the first time.
792 AcpiGetObjectInfo - removed support for the _STA method. This was causing
793 problems on some platforms.
795 Added a new _OSI string, "Windows 2017.2".
797 Cleaned up and simplified the module-level code support. These changes
798 are in preparation for the eventual removal of the legacy MLC support
799 (deferred execution), replaced by the new MLC architecture which executes
800 the MLC as a table is loaded (DSDT/SSDTs).
802 Changed a compile-time option to a runtime option. Changes the option to
803 ignore ACPI table load-time package resolution errors into a runtime
804 option. Used only for platforms that generate many AE_NOT_FOUND errors
805 during boot. AcpiGbl_IgnorePackageResolutionErrors.
807 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
808 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
809 compilation errors from unused variables (seen with some compilers).
812 2) iASL Compiler/Disassembler and Tools:
814 ASLTS: parallelized execution in order to achieve an (approximately) 2X
815 performance increase.
817 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
820 ----------------------------------------
821 09 February 2018. Summary of changes for version 20180209:
824 1) ACPICA kernel-resident subsystem:
826 Completed the final integration of the recent changes to Package Object
827 handling and the module-level AML code support. This allows forward
828 references from individual package elements when the package object is
829 declared from within module-level code blocks. Provides compatibility
830 with other ACPI implementations.
832 The new architecture for the AML module-level code has been completed and
833 is now the default for the ACPICA code. This new architecture executes
834 the module-level code in-line as the ACPI table is loaded/parsed instead
835 of the previous architecture which deferred this code until after the
836 table was fully loaded. This solves some ASL code ordering issues and
837 provides compatibility with other ACPI implementations. At this time,
838 there is an option to fallback to the earlier architecture, but this
839 support is deprecated and is planned to be completely removed later this
842 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
843 resolution of named reference elements within Package objects. Although
844 this is potentially a serious problem, it can generate a lot of
845 noise/errors on platforms whose firmware carries around a bunch of unused
846 Package objects. To disable these errors, define
847 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
848 errors are always reported for ACPICA applications such as AcpiExec.
850 Fixed a regression related to the explicit type-conversion AML operators
851 (ToXXXX). The regression was introduced early in 2017 but was not seen
852 until recently because these operators are not fully supported by other
853 ACPI implementations and are thus rarely used by firmware developers. The
854 operators are defined by the ACPI specification to not implement the
855 "implicit result object conversion". The regression incorrectly
856 introduced this object conversion for the following explicit conversion
867 2) iASL Compiler/Disassembler and Tools:
869 iASL: Fixed a problem with the compiler constant folding feature as
870 related to the ToXXXX explicit conversion operators. These operators do
871 not support the "implicit result object conversion" by definition. Thus,
872 ASL expressions that use these operators cannot be folded to a simple
873 Store operator because Store implements the implicit conversion. This
874 change uses the CopyObject operator for the ToXXXX operator folding
875 instead. CopyObject is defined to not implement implicit result
876 conversions and is thus appropriate for folding the ToXXXX operators.
878 iASL: Changed the severity of an error condition to a simple warning for
879 the case where a symbol is declared both locally and as an external
880 symbol. This accommodates existing ASL code.
882 AcpiExec: The -ep option to enable the new architecture for module-level
883 code has been removed. It is replaced by the -dp option which instead has
884 the opposite effect: it disables the new architecture (the default) and
885 enables the legacy architecture. When the legacy code is removed in the
886 future, the -dp option will be removed also.
888 ----------------------------------------
889 05 January 2018. Summary of changes for version 20180105:
892 1) ACPICA kernel-resident subsystem:
894 Updated all copyrights to 2018. This affects all source code modules.
896 Fixed a possible build error caused by an unresolved reference to the
897 AcpiUtSafeStrncpy function.
899 Removed NULL pointer arithmetic in the various pointer manipulation
900 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
901 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
903 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
907 2) iASL Compiler/Disassembler and Tools:
909 ASLTS: Updated all copyrights to 2018.
911 Tools: Updated all signon copyrights to 2018.
913 AcpiXtract: Fixed a regression related to ACPI table signatures where the
914 signature was truncated to 3 characters (instead of 4).
916 AcpiExec: Restore the original terminal mode after the use of the -v and
919 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
921 ----------------------------------------
922 14 December 2017. Summary of changes for version 20171214:
925 1) ACPICA kernel-resident subsystem:
927 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
928 interface where the optional "pathname" argument had inadvertently become
929 a required argument returning an error if omitted (NULL pointer
932 Fixed two possible memory leaks related to the recently developed "late
933 resolution" of reference objects within ASL Package Object definitions.
935 Added two recently defined _OSI strings: "Windows 2016" and "Windows
936 2017". Mario Limonciello.
938 Implemented and deployed a safer version of the C library function
939 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
940 creation of unterminated strings as a possible result of a standard
943 Cleaned up and restructured the global variable file (acglobal.h). There
944 are many changes, but no functional changes.
947 2) iASL Compiler/Disassembler and Tools:
949 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
950 optional OemData field at the end of the table was incorrectly required
951 for proper compilation. It is now correctly an optional field.
953 ASLTS: The entire suite was converted from standard ASL to the ASL+
954 language, using the ASL-to-ASL+ converter which is integrated into the
955 iASL compiler. A binary compare of all output files has verified the
956 correctness of the conversion.
958 iASL: Fixed the source code build for platforms where "char" is unsigned.
959 This affected the iASL lexer only. Jung-uk Kim.
961 ----------------------------------------
962 10 November 2017. Summary of changes for version 20171110:
965 1) ACPICA kernel-resident subsystem:
967 This release implements full support for ACPI 6.2A:
968 NFIT - Added a new subtable, "Platform Capabilities Structure"
969 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
970 errata release of the specification.
972 Other ACPI table changes:
973 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
974 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
977 Utilities: Modified the string/integer conversion functions to use
978 internal 64-bit divide support instead of a native divide. On 32-bit
979 platforms, a 64-bit divide typically requires a library function which
980 may not be present in the build (kernel or otherwise).
982 Implemented a targeted error message for timeouts returned from the
983 Embedded Controller device driver. This is seen frequently enough to
984 special-case an AE_TIME returned from an EC operation region access:
985 "Timeout from EC hardware or EC device driver"
987 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
988 runtime error messages have the identical prefix.
991 2) iASL Compiler/Disassembler and Tools:
993 AcpiXtract: Fixed a problem with table header detection within the
994 acpidump file. Processing a table could be ended early if a 0x40 (@)
995 appears in the original binary table, resulting in the @ symbol appearing
996 in the decoded ASCII field at the end of the acpidump text line. The
997 symbol caused acpixtract to incorrectly think it had reached the end of
998 the current table and the beginning of a new table.
1000 AcpiXtract: Added an option (-f) to ignore some errors during table
1001 extraction. This initial implementation ignores non-ASCII and non-
1002 printable characters found in the acpidump text file.
1004 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
1005 for ASLTS. This feature is used to track memory allocations from
1006 different memory caches within the ACPICA code. At the end of an ASLTS
1007 run, these memory statistics are recorded and stored in a log file.
1009 Debugger (user-space version): Implemented a simple "Background" command.
1010 Creates a new thread to execute a control method in the background, while
1011 control returns to the debugger prompt to allow additional commands.
1012 Syntax: Background <Namepath> [Arguments]
1014 ----------------------------------------
1015 29 September 2017. Summary of changes for version 20170929:
1018 1) ACPICA kernel-resident subsystem:
1020 Redesigned and implemented an improved ASL While() loop timeout
1021 mechanism. This mechanism is used to prevent infinite loops in the kernel
1022 AML interpreter caused by either non-responsive hardware or incorrect AML
1023 code. The new implementation uses AcpiOsGetTimer instead of a simple
1024 maximum loop count, and is thus more accurate and constant across
1025 different machines. The default timeout is currently 30 seconds, but this
1026 may be adjusted later.
1028 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
1029 better reflect the new implementation of the loop timeout mechanism.
1031 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
1032 and to fix an off-by-one error. Jung-uk Kim.
1034 Fixed an EFI build problem by updating the makefiles to for a new file
1035 that was added, utstrsuppt.c
1038 2) iASL Compiler/Disassembler and Tools:
1040 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
1041 includes support in the table disassembler, compiler, and template
1044 iASL: Added an exception for an illegal type of recursive method
1045 invocation. If a method creates named objects, the first recursive call
1046 will fail at runtime. This change adds an error detection at compile time
1047 to catch the problem up front. Note: Marking such a method as
1048 "serialized" will not help with this problem, because the same thread can
1049 acquire the method mutex more than once. Example compiler and runtime
1058 dsdt.asl 22: MTH1 ()
1059 Error 6152 - ^ Illegal recursive call to method
1060 that creates named objects (MTH1)
1062 Previous runtime exception:
1063 ACPI Error: [INT1] Namespace lookup failure,
1064 AE_ALREADY_EXISTS (20170831/dswload2-465)
1066 iASL: Updated support for External() opcodes to improve namespace
1067 management and error detection. These changes are related to issues seen
1068 with multiple-segment namespace pathnames within External declarations,
1071 External(\_SB.PCI0.GFX0, DeviceObj)
1072 External(\_SB.PCI0.GFX0.ALSI)
1074 iASL: Implemented support for multi-line error/warning messages. This
1075 enables more detailed and helpful error messages as below, from the
1076 initial deployment for the duplicate names error:
1078 DSDT.iiii 1692: Device(PEG2) {
1079 Error 6074 - ^ Name already exists in scope
1082 Original name creation/declaration below:
1083 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
1085 AcpiXtract: Added additional flexibility to support differing input hex
1086 dump formats. Specifically, hex dumps that contain partial disassembly
1087 and/or comments within the ACPI table data definition. There exist some
1088 dump utilities seen in the field that create this type of hex dump (such
1089 as Simics). For example:
1091 DSDT @ 0xdfffd0c0 (10999 bytes)
1099 Creator_id 1280593481
1100 Creator_revision 537399345
1101 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
1103 2af0: 5f 4c 30 46 00 a4 01
1105 Test suite: Miscellaneous changes/fixes:
1106 More cleanup and simplification of makefiles
1107 Continue compilation of test cases after a compile failure
1108 Do not perform binary compare unless both files actually exist
1110 iASL: Performed some code/module restructuring. Moved all memory
1111 allocation functions to new modules. Two new files, aslallocate.c and
1114 ----------------------------------------
1115 31 August 2017. Summary of changes for version 20170831:
1118 1) ACPICA kernel-resident subsystem:
1120 Implemented internal support for full 64-bit addresses that appear in all
1121 Generic Address Structure (GAS) structures. Previously, only the lower 32
1122 bits were used. Affects the use of GAS structures in the FADT and other
1123 tables, as well as the GAS structures passed to the AcpiRead and
1124 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
1126 Added header support for the PDTT ACPI table (Processor Debug Trigger
1127 Table). Full support in the iASL Data Table Compiler and disassembler is
1131 2) iASL Compiler/Disassembler and Tools:
1133 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
1134 Properties Topology Table) where a flag bit was specified in the wrong
1135 bit position ("Line Size Valid", bit 6).
1137 iASL: Implemented support for Octal integer constants as defined by the
1138 ASL language grammar, per the ACPI specification. Any integer constant
1139 that starts with a zero is an octal constant. For example,
1140 Store (037777, Local0) /* Octal constant */
1141 Store (0x3FFF, Local0) /* Hex equivalent */
1142 Store (16383, Local0) /* Decimal equivalent */
1144 iASL: Improved overflow detection for 64-bit string conversions during
1145 compilation of integer constants. "Overflow" in this case means a string
1146 that represents an integer that is too large to fit into a 64-bit value.
1147 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
1148 the low-order 32 bits with a warning, as previously implemented. Several
1149 new exceptions are defined that indicate a 64-bit overflow, as well as
1150 the base (radix) that was used during the attempted conversion. Examples:
1151 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
1152 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
1153 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
1155 iASL: Added a warning for the case where a ResourceTemplate is declared
1156 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
1157 this case, the resulting template is created with a single END_TAG
1158 descriptor, which is essentially useless.
1160 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
1161 include compilation error codes as well.
1163 ----------------------------------------
1164 28 July 2017. Summary of changes for version 20170728:
1167 1) ACPICA kernel-resident subsystem:
1169 Fixed a regression seen with small resource descriptors that could cause
1170 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
1172 AML interpreter: Implemented a new feature that allows forward references
1173 from individual named references within package objects that are
1174 contained within blocks of "module-level code". This provides
1175 compatibility with other ACPI implementations and supports existing
1176 firmware that depends on this feature. Example:
1179 If (ABCD) /* An If() at module-level */
1181 Name (PKG1, Package()
1183 INT1 /* Forward reference to object INT1
1189 AML Interpreter: Fixed a problem with the Alias() operator where aliases
1190 to some ASL objects were not handled properly. Objects affected are:
1191 Mutex, Event, and OperationRegion.
1193 AML Debugger: Enhanced to properly handle AML Alias objects. These
1194 objects have one level of indirection which was not fully supported by
1197 Table Manager: Added support to detect and ignore duplicate SSDTs within
1198 the XSDT/RSDT. This error in the XSDT has been seen in the field.
1200 EFI and EDK2 support:
1201 Enabled /WX flag for MSVC builds
1202 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
1203 Added local support for 64-bit multiply and shift operations
1204 Added support to compile acpidump.efi on Windows
1205 Added OSL function stubs for interfaces not used under EFI
1207 Added additional support for the _DMA predefined name. _DMA returns a
1208 buffer containing a resource template. This change add support within the
1209 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
1210 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
1213 2) iASL Compiler/Disassembler and Tools:
1215 iASL: Fixed a problem where the internal input line buffer(s) could
1216 overflow if there are very long lines in the input ASL source code file.
1217 Implemented buffer management that automatically increases the size of
1218 the buffers as necessary.
1220 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
1221 errors. If the specified exception is not raised during compilation, the
1222 compiler emits an error. This is intended to support the ASL test suite,
1223 but may be useful in other contexts.
1225 iASL: Implemented a new predefined macro, __METHOD__, which returns a
1226 string containing the name of the current control method that is being
1229 iASL: Implemented debugger and table compiler support for the SDEI ACPI
1230 table (Software Delegated Exception Interface). James Morse
1231 <james.morse@arm.com>
1233 Unix/Linux makefiles: Added an option to disable compile optimizations.
1234 The disable occurs when the NOOPT flag is set to TRUE.
1235 theracermaster@gmail.com
1237 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
1238 when there are different tables for 32-bit versus 64-bit.
1240 Enhanced error reporting for the ASL test suite (ASLTS) by removing
1241 unnecessary/verbose text, and emit the actual line number where an error
1242 has occurred. These changes are intended to improve the usefulness of the
1245 ----------------------------------------
1246 29 June 2017. Summary of changes for version 20170629:
1249 1) ACPICA kernel-resident subsystem:
1251 Tables: Implemented a deferred ACPI table verification. This is useful
1252 for operating systems where the tables cannot be verified in the early
1253 initialization stage due to early memory mapping limitations on some
1254 architectures. Lv Zheng.
1256 Tables: Removed the signature validation for dynamically loaded tables.
1257 Provides compatibility with other ACPI implementations. Previously, only
1258 SSDT tables were allowed, as per the ACPI specification. Now, any table
1259 signature can be used via the Load() operator. Lv Zheng.
1261 Tables: Fixed several mutex issues that could cause errors during table
1262 acquisition. Lv Zheng.
1264 Tables: Fixed a problem where an ACPI warning could be generated if a
1265 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
1267 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
1268 AcpiPutTable interfaces. This applies to the "late stage" table loading
1269 when the use of AcpiPutTable is no longer required (since the system
1270 memory manager is fully running and available). Lv Zheng.
1272 Fixed/Reverted a regression during processing of resource descriptors
1273 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
1274 exception in this case.
1276 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
1277 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
1279 Interpreter: Fixed a possible fault if an Alias operator with an invalid
1280 or duplicate target is encountered during Alias creation in
1281 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
1283 Added an option to use designated initializers for function pointers.
1284 Kees Cook <keescook@google.com>
1287 2) iASL Compiler/Disassembler and Tools:
1289 iASL: Allow compilation of External declarations with target pathnames
1290 that refer to existing named objects within the table. Erik Schmauss.
1292 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
1293 FieldUnit name also is declared via External in the same table. Erik
1296 iASL: Allow existing scope names within pathnames used in External
1297 statements. For example:
1298 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
1301 iASL: IORT ACPI table: Implemented changes required to decode the new
1302 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
1303 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
1305 Disassembler: Don't abort disassembly on errors from External()
1306 statements. Erik Schmauss.
1308 Disassembler: fixed a possible fault when one of the Create*Field
1309 operators references a Resource Template. ACPICA Bugzilla 1396.
1311 iASL: In the source code, resolved some naming inconsistences across the
1312 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
1313 Adds a new file, aslparseop.c
1315 ----------------------------------------
1316 31 May 2017. Summary of changes for version 20170531:
1319 0) ACPI 6.2 support:
1321 The ACPI specification version 6.2 has been released and is available at
1322 http://uefi.org/specifications
1324 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
1325 are summarized below.
1327 New ACPI tables (Table Compiler/Disassembler/Templates):
1328 HMAT (Heterogeneous Memory Attributes Table)
1329 WSMT (Windows SMM Security Mitigation Table)
1330 PPTT (Processor Properties Topology Table)
1332 New subtables for existing ACPI tables:
1333 HEST (New subtable, Arch-deferred machine check)
1334 SRAT (New subtable, Arch-specific affinity structure)
1335 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
1337 Simple updates for existing ACPI tables:
1338 BGRT (two new flag bits)
1339 HEST (New bit defined for several subtables, GHES_ASSIST)
1341 New Resource Descriptors and Resource macros (Compiler/Disassembler):
1347 New type for hardware error notification (section 18.3.2.9)
1349 New predefined names/methods (Compiler/Interpreter):
1350 _HMA (Heterogeneous Memory Attributes)
1351 _LSI (Label Storage Information)
1352 _LSR (Label Storage Read)
1353 _LSW (Label Storage Write)
1355 ASL grammar/macro changes (Compiler):
1356 For() ASL macro, implemented with the AML while operator
1357 Extensions to Concatenate operator
1358 Support for multiple definition blocks in same ASL file
1359 Clarification for Buffer operator
1360 Allow executable AML code underneath all scopes (Devices, etc.)
1361 Clarification/change for the _OSI return value
1362 ASL grammar update for reference operators
1363 Allow a zero-length string for AML filename in DefinitionBlock
1366 New device object notification value
1367 Remove a notify value (0x0C) for graceful shutdown
1368 New UUIDs for processor/cache properties and
1369 physical package property
1370 New _HID, ACPI0014 (Wireless Power Calibration Device)
1373 1) ACPICA kernel-resident subsystem:
1375 Added support to disable ACPI events on hardware-reduced platforms.
1376 Eliminates error messages of the form "Could not enable fixed event". Lv
1379 Fixed a problem using Device/Thermal objects with the ObjectType and
1380 DerefOf ASL operators. This support had not been fully/properly
1383 Fixed a problem where if a Buffer object containing a resource template
1384 was longer than the actual resource template, an error was generated --
1385 even though the AML is legal. This case has been seen in the field.
1387 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
1388 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
1390 Added header file changes for the TPM2 ACPI table. Update to new version
1391 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
1393 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
1394 These interfaces are intended to be used only in conjunction with the
1395 predefined _DLM method (Device Lock Method). "This object appears in a
1396 device scope when AML access to the device must be synchronized with the
1399 Example Code and Data Size: These are the sizes for the OS-independent
1400 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1401 debug version of the code includes the debug output trace mechanism and
1402 has a much larger code and data size.
1405 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
1406 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
1408 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1409 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1412 2) iASL Compiler/Disassembler and Tools:
1414 iASL: Fixed a problem where an External() declaration could not refer to
1415 a Field Unit. Erik Schmauss.
1417 Disassembler: Improved support for the Switch/Case operators. This
1418 feature will disassemble AML code back to the original Switch operators
1419 when possible, instead of an If..Else sequence. David Box
1421 iASL and disassembler: Improved the handling of multiple extraneous
1422 parentheses for both ASL input and disassembled ASL output.
1424 Improved the behavior of the iASL compiler and disassembler to detect
1425 improper use of external declarations
1427 Disassembler: Now aborts immediately upon detection of an unknown AML
1428 opcode. The AML parser has no real way to recover from this, and can
1429 result in the creation of an ill-formed parse tree that causes errors
1430 later during the disassembly.
1432 All tools: Fixed a problem where the Unix application OSL did not handle
1433 control-c correctly. For example, a control-c could incorrectly wake the
1436 AcpiExec: Improved the Control-C handling and added a handler for
1437 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
1440 Reduced the verbosity of the generic unix makefiles. Previously, each
1441 compilation displayed the full set of compiler options. This has been
1442 eliminated as the options are easily inspected within the makefiles. Each
1443 compilation now results in a single line of output.
1445 ----------------------------------------
1446 03 March 2017. Summary of changes for version 20170303:
1449 0) ACPICA licensing:
1451 The licensing information at the start of each source code module has
1452 been updated. In addition to the Intel license, the dual GPLv2/BSD
1453 license has been added for completeness. Now, a single version of the
1454 source code should be suitable for all ACPICA customers. This is the
1455 major change for this release since it affects all source code modules.
1458 1) ACPICA kernel-resident subsystem:
1460 Fixed two issues with the common asltypes.h header that could cause
1461 problems in some environments: (Kim Jung-uk)
1462 Removed typedef for YY_BUFFER_STATE ?
1463 Fixes an error with earlier versions of Flex.
1464 Removed use of FILE typedef (which is only defined in stdio.h)
1467 2) iASL Compiler/Disassembler and Tools:
1469 Disassembler: fixed a regression introduced in 20170224. A fix for a
1470 memory leak related to resource descriptor tags (names) could fault when
1471 the disassembler was generated with 64-bit compilers.
1473 The ASLTS test suite has been updated to implement a new testing
1474 architecture. During generation of the suite from ASL source, both the
1475 ASL and ASL+ compilers are now validated, as well as the disassembler
1476 itself (Erik Schmauss). The architecture executes as follows:
1478 For every ASL source module:
1479 Compile (legacy ASL compilation)
1480 Disassemble the resulting AML to ASL+ source code
1481 Compile the new ASL+ module
1482 Perform a binary compare on the legacy AML and the new ASL+ AML
1483 The ASLTS suite then executes normally using the AML binaries.
1485 ----------------------------------------
1486 24 February 2017. Summary of changes for version 20170224:
1489 1) ACPICA kernel-resident subsystem:
1491 Interpreter: Fixed two issues with the control method return value auto-
1492 repair feature, where an attempt to double-delete an internal object
1493 could result in an ACPICA warning (for _CID repair and others). No fault
1494 occurs, however, because the attempted deletion (actually a release to an
1495 internal cache) is detected and ignored via object poisoning.
1497 Debugger: Fixed an AML interpreter mutex issue during the single stepping
1498 of control methods. If certain debugger commands are executed during
1499 stepping, a mutex acquire/release error could occur. Lv Zheng.
1501 Fixed some issues generating ACPICA with the Intel C compiler by
1502 restoring the original behavior and compiler-specific include file in
1505 Example Code and Data Size: These are the sizes for the OS-independent
1506 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1507 debug version of the code includes the debug output trace mechanism and
1508 has a much larger code and data size.
1511 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1512 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1514 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1515 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1518 2) iASL Compiler/Disassembler and Tools:
1520 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
1521 tool has been designed, implemented, and included in this release. The
1522 key feature of this utility is that the original comments within the
1523 input ASL file are preserved during the conversion process, and included
1524 within the converted ASL+ file -- thus creating a transparent conversion
1525 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
1527 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
1530 iASL/Disassembler: Improved the detection and correct disassembly of
1531 Switch/Case operators. This feature detects sequences of if/elseif/else
1532 operators that originated from ASL Switch/Case/Default operators and
1533 emits the original operators. David Box.
1535 iASL: Improved the IORT ACPI table support in the following areas. Lv
1537 Clear MappingOffset if the MappingCount is zero.
1538 Fix the disassembly of the SMMU GSU interrupt offset.
1539 Update the template file for the IORT table.
1541 Disassembler: Enhanced the detection and disassembly of resource
1542 template/descriptor within a Buffer object. An EndTag descriptor is now
1543 required to have a zero second byte, since all known ASL compilers emit
1544 this. This helps eliminate incorrect decisions when a buffer is
1545 disassembled (false positives on resource templates).
1547 ----------------------------------------
1548 19 January 2017. Summary of changes for version 20170119:
1551 1) General ACPICA software:
1553 Entire source code base: Added the 2017 copyright to all source code
1554 legal/licensing module headers and utility/tool signons. This includes
1555 the standard Linux dual-license header. This affects virtually every file
1556 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
1557 the ACPICA test suite.
1560 2) iASL Compiler/Disassembler and Tools:
1562 iASL: Removed/fixed an inadvertent remark when a method argument
1563 containing a reference is used as a target operand within the method (and
1564 never used as a simple argument), as in the example below. Jeffrey Hugo.
1566 dsdt.asl 1507: Store(0x1, Arg0)
1567 Remark 2146 - ^ Method Argument is never used (Arg0)
1569 All tools: Removed the bit width of the compiler that generated the tool
1570 from the common signon for all user space tools. This proved to be
1571 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
1572 from the generic makefiles (Thomas Petazzoni). Example below.
1575 ASL+ Optimizing Compiler version 20170119-32
1576 ASL+ Optimizing Compiler version 20170119-64
1579 ASL+ Optimizing Compiler version 20170119
1581 ----------------------------------------
1582 22 December 2016. Summary of changes for version 20161222:
1585 1) ACPICA kernel-resident subsystem:
1587 AML Debugger: Implemented a new mechanism to simplify and enhance
1588 debugger integration into all environments, including kernel debuggers
1589 and user-space utilities, as well as remote debug services. This
1590 mechanism essentially consists of new OSL interfaces to support debugger
1591 initialization/termination, as well as wait/notify interfaces to perform
1592 the debugger handshake with the host. Lv Zheng.
1595 AcpiOsInitializeDebugger (void)
1596 AcpiOsTerminateDebugger (void)
1597 AcpiOsWaitCommandReady (void)
1598 AcpiOsNotifyCommandComplete (void)
1600 New OS services layer:
1601 osgendbg.c -- Example implementation, and used for AcpiExec
1603 Update for Generic Address Space (GAS) support: Although the AccessWidth
1604 and/or BitOffset fields of the GAS are not often used, this change now
1605 fully supports these fields. This affects the internal support for FADT
1606 registers, registers in other ACPI data tables, and the AcpiRead and
1607 AcpiWrite public interfaces. Lv Zheng.
1609 Sleep support: In order to simplify integration of ACPI sleep for the
1610 various host operating systems, a new OSL interface has been introduced.
1611 AcpiOsEnterSleep allows the host to perform any required operations
1612 before the final write to the sleep control register(s) is performed by
1616 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
1618 Called from these internal interfaces:
1622 EFI support: Added a very small EFI/ACPICA example application. Provides
1623 a simple demo for EFI integration, as well as assisting with resolution
1624 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
1626 source/tools/efihello/efihello.c
1628 Local C library: Implemented several new functions to enhance ACPICA
1629 portability, for environments where these clib functions are not
1630 available (such as EFI). Lv Zheng:
1637 Fixed a regression where occasionally a valid resource descriptor was
1638 incorrectly detected as invalid at runtime, and a
1639 AE_AML_NO_RESOURCE_END_TAG was returned.
1641 Fixed a problem with the recently implemented support that enables
1642 control method invocations as Target operands to many ASL operators.
1643 Warnings of this form: "Needed type [Reference], found [Processor]" were
1644 seen at runtime for some method invocations.
1646 Example Code and Data Size: These are the sizes for the OS-independent
1647 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1648 debug version of the code includes the debug output trace mechanism and
1649 has a much larger code and data size.
1652 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
1653 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
1655 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1656 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1659 2) iASL Compiler/Disassembler and Tools:
1661 Disassembler: Enhanced output by adding the capability to detect and
1662 disassemble ASL Switch/Case statements back to the original ASL source
1663 code instead of if/else blocks. David Box.
1665 AcpiHelp: Split a large file into separate files based upon
1666 functionality/purpose. New files are:
1670 ----------------------------------------
1671 17 November 2016. Summary of changes for version 20161117:
1674 1) ACPICA kernel-resident subsystem:
1676 Table Manager: Fixed a regression introduced in 20160729, "FADT support
1677 cleanup". This was an attempt to remove all references in the source to
1678 the FADT version 2, which never was a legal version number. It was
1679 skipped because it was an early version of 64-bit support that was
1680 eventually abandoned for the current 64-bit support.
1682 Interpreter: Fixed a problem where runtime implicit conversion was
1683 incorrectly disabled for the ASL operators below. This brings the
1684 behavior into compliance with the ACPI specification:
1692 Table Manager: Added a new public interface, AcpiPutTable, used to
1693 release and free an ACPI table returned by AcpiGetTable and related
1694 interfaces. Lv Zheng.
1696 Example Code and Data Size: These are the sizes for the OS-independent
1697 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1698 debug version of the code includes the debug output trace mechanism and
1699 has a much larger code and data size.
1702 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1703 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1705 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1706 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1709 2) iASL Compiler/Disassembler and Tools:
1711 Disassembler: Fixed a regression for disassembly of Resource Template.
1712 Detection of templates in the AML stream missed some types of templates.
1714 iASL: Fixed a problem where an Access Size error was returned for the PCC
1715 address space when the AccessSize of the GAS register is greater than a
1718 iASL: Implemented several grammar changes for the operators below. These
1719 changes are slated for the next version of the ACPI specification:
1720 RefOf - Disallow method invocation as an operand
1721 CondRefOf - Disallow method invocation as an operand
1722 DerefOf - Disallow operands that use the result from operators
1724 do not return a reference (Changed TermArg to
1727 iASL: Control method invocations are now allowed for Target operands, as
1728 per the ACPI specification. Removed error for using a control method
1729 invocation as a Target operand.
1731 Disassembler: Improved detection of Resource Templates, Unicode, and
1732 Strings within Buffer objects. These subtypes do not contain a specific
1733 opcode to indicate the originating ASL code, and they must be detected by
1734 other means within the disassembler.
1736 iASL: Implemented an optimization improvement for 32-bit ACPI tables
1737 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
1738 only after 64-bit to 32-bit truncation. A truncation warning message is
1739 still emitted, however.
1741 AcpiXtract: Implemented handling for both types of line terminators (LF
1742 or CR/LF) so that it can accept AcpiDump output files from any system.
1745 AcpiBin: Added two new options for comparing AML files:
1746 -a: compare and display ALL mismatches
1747 -o: start compare at this offset into the second file
1749 ----------------------------------------
1750 30 September 2016. Summary of changes for version 20160930:
1753 1) ACPICA kernel-resident subsystem:
1755 Fixed a regression in the internal AcpiTbFindTable function where a non
1756 AE_OK exception could inadvertently be returned even if the function did
1757 not fail. This problem affects the following operators:
1761 Fixed a regression in the LoadTable operator where a load to any
1762 namespace location other than the root no longer worked properly.
1764 Increased the maximum loop count value that will result in the
1765 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
1766 prevent infinite loops within the AML interpreter and thus the host OS
1767 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
1770 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
1771 acpixf.h file. This allows hosts to easily configure the maximum loop
1774 Removed an illegal character in the strtoul64.c file. This character
1775 caused errors with some C compilers.
1777 Example Code and Data Size: These are the sizes for the OS-independent
1778 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1779 debug version of the code includes the debug output trace mechanism and
1780 has a much larger code and data size.
1783 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1784 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1786 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
1787 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1790 2) iASL Compiler/Disassembler and Tools:
1792 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
1793 the simpler ASL ElseIf keyword. During the conversion, a trailing If
1794 block could be lost and missing from the disassembled output.
1796 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
1797 the missing rule caused a parse error when using the Index operator as an
1798 operand to ObjectType. This construct now compiles properly. Example:
1799 ObjectType(PKG1[4]).
1801 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
1802 option). Previously, unresolved symbols could cause a protection fault.
1803 Such symbols are now marked as unresolved in the map file.
1805 iASL: Implemented support to allow control method invocations as an
1806 operand to the ASL DeRefOf operator. Example:
1807 DeRefOf(MTH1(Local0))
1809 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
1810 possible _PLD buffer now includes examination of both the normal buffer
1811 length (16 or 20) as well as the surrounding AML package length.
1813 Disassembler: Fixed a problem with the decoding of complex expressions
1814 within the Divide operator for ASL+. For the case where both the quotient
1815 and remainder targets are specified, the entire statement cannot be
1816 disassembled. Previously, the output incorrectly contained a mix of ASL-
1817 and ASL+ operators. This mixed statement causes a syntax error when
1819 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
1821 Divide (INT1 + 6, 128, RSLT, QUOT)
1823 iASL/Tools: Added support to process AML and non-AML ACPI tables
1824 consistently. For the disassembler and AcpiExec, allow all types of ACPI
1825 tables (AML and data tables). For the iASL -e option, allow only AML
1828 ----------------------------------------
1829 31 August 2016. Summary of changes for version 20160831:
1832 1) ACPICA kernel-resident subsystem:
1834 Improve support for the so-called "module-level code", which is defined
1835 to be math, logical and control AML opcodes that appear outside of any
1836 control method. This change improves the support by adding more opcodes
1837 that can be executed in the manner. Some other issues have been solved,
1838 and the ASL grammar changes to support such code under all scope
1839 operators (Device, etc.) are complete. Lv Zheng.
1841 UEFI support: these OSL functions have been implemented. This is an
1842 additional step toward supporting the AcpiExec utility natively (with
1843 full hardware access) under UEFI. Marcelo Ferreira.
1844 AcpiOsReadPciConfiguration
1845 AcpiOsWritePciConfiguration
1847 Fixed a possible mutex error during control method auto-serialization. Lv
1850 Updated support for the Generic Address Structure by fully implementing
1851 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
1854 Updated the return value for the internal _OSI method. Instead of
1855 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
1856 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
1857 implementations, and will be reflected and clarified in the next version
1858 of the ACPI specification.
1860 Implemented two new table events that can be passed to an ACPICA table
1861 handler. These events are used to indicate a table installation or
1862 uninstallation. These events are used in addition to existed table load
1863 and unload events. Lv Zheng.
1865 Implemented a cleanup for all internal string-to-integer conversions.
1866 Consolidate multiple versions of this functionality and limit possible
1867 bases to either 10 or 16 to simplify the code. Adds a new file,
1870 Cleanup the inclusion order of the various compiler-specific headers.
1871 This simplifies build configuration management. The compiler-specific
1872 headers are now split out from the host-specific headers. Lv Zheng.
1874 Example Code and Data Size: These are the sizes for the OS-independent
1875 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1876 debug version of the code includes the debug output trace mechanism and
1877 has a much larger code and data size.
1880 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
1881 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1884 2) iASL Compiler/Disassembler and Tools:
1886 iASL/AcpiExec: Added a command line option to display the build date/time
1887 of the tool (-vd). This can be useful to verify that the correct version
1888 of the tools are being used.
1890 AML Debugger: Implemented a new subcommand ("execute predef") to execute
1891 all predefined control methods and names within the current namespace.
1892 This can be useful for debugging problems with ACPI tables and the ACPI
1895 ----------------------------------------
1896 29 July 2016. Summary of changes for version 20160729:
1899 1) ACPICA kernel-resident subsystem:
1901 Implemented basic UEFI support for the various ACPICA tools. This
1903 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
1904 2) Support to obtain the ACPI tables on UEFI.
1905 3) Local implementation of required C library functions not available on
1907 4) A front-end (main) function for the tools for UEFI-related
1910 The initial deployment of this support is the AcpiDump utility executing
1911 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
1912 Current environments supported are Linux/Unix. MSVC generation is not
1913 supported at this time. See the generate/efi/README file for build
1914 instructions. Lv Zheng.
1916 Future plans include porting the AcpiExec utility to execute natively on
1917 the platform with I/O and memory access. This will allow viewing/dump of
1918 the platform namespace and native execution of ACPI control methods that
1919 access the actual hardware. To fully implement this support, the OSL
1920 functions below must be implemented with UEFI interfaces. Any community
1921 help in the implementation of these functions would be appreciated:
1926 AcpiOsReadPciConfiguration
1927 AcpiOsWritePciConfiguration
1929 Restructured and standardized the C library configuration for ACPICA,
1930 resulting in the various configuration options below. This includes a
1931 global restructuring of the compiler-dependent and platform-dependent
1932 include files. These changes may affect the existing platform-dependent
1933 configuration files on some hosts. Lv Zheng.
1935 The current C library configuration options appear below. For any issues,
1936 it may be helpful to examine the existing compiler-dependent and
1937 platform-dependent files as examples. Lv Zheng.
1940 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1942 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1943 2) Unix/Windows/BSD applications:
1944 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
1946 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1947 3) UEFI applications:
1948 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1950 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
1951 4) UEFI applications (EDK2/StdLib):
1952 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
1953 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
1956 AML interpreter: "module-level code" support. Allows for execution of so-
1957 called "executable" AML code (math/logical operations, etc.) outside of
1958 control methods not just at the module level (top level) but also within
1959 any scope declared outside of a control method - Scope{}, Device{},
1960 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
1962 Simplified the configuration of the "maximum AML loops" global option by
1963 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
1964 modified at runtime.
1967 Example Code and Data Size: These are the sizes for the OS-independent
1968 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1969 debug version of the code includes the debug output trace mechanism and
1970 has a much larger code and data size.
1973 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
1974 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
1977 2) iASL Compiler/Disassembler and Tools:
1979 iASL: Add full support for the RASF ACPI table (RAS Features Table).
1980 Includes disassembler, data table compiler, and header support.
1982 iASL Expand "module-level code" support. Allows for
1983 compilation/disassembly of so-called "executable" AML code (math/logical
1984 operations, etc.) outside of control methods not just at the module level
1985 (top level) but also within any scope declared outside of a control
1986 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
1989 AcpiDump: Added support for dumping all SSDTs on newer versions of
1990 Windows. These tables are now easily available -- SSDTs are not available
1991 through the registry on older versions.
1993 ----------------------------------------
1994 27 May 2016. Summary of changes for version 20160527:
1997 1) ACPICA kernel-resident subsystem:
1999 Temporarily reverted the new arbitrary bit length/alignment support in
2000 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
2001 a number of regressions with the new code that need to be fully resolved
2002 and tested before this support can be finally integrated into ACPICA.
2003 Apologies for any inconveniences these issues may have caused.
2005 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
2006 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
2007 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
2009 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
2010 option. Adds a new return macro, return_STR. Junk-uk Kim.
2012 Example Code and Data Size: These are the sizes for the OS-independent
2013 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2014 debug version of the code includes the debug output trace mechanism and
2015 has a much larger code and data size.
2018 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
2019 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2021 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2022 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
2024 ----------------------------------------
2025 22 April 2016. Summary of changes for version 20160422:
2027 1) ACPICA kernel-resident subsystem:
2029 Fixed a regression in the GAS (generic address structure) arbitrary bit
2030 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
2031 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
2033 ACPI 6.0: Added support for new/renamed resource macros. One new argument
2034 was added to each of these macros, and the original name has been
2035 deprecated. The AML disassembler will always disassemble to the new
2036 names. Support for the new macros was added to iASL, disassembler,
2037 resource manager, and the acpihelp utility. ACPICA BZ 1274.
2039 I2cSerialBus -> I2cSerialBusV2
2040 SpiSerialBus -> SpiSerialBusV2
2041 UartSerialBus -> UartSerialBusV2
2043 ACPI 6.0: Added support for a new integer field that was appended to the
2044 package object returned by the _BIX method. This adds iASL compile-time
2045 and AML runtime error checking. ACPICA BZ 1273.
2047 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
2048 Subspace Type2" (Headers, Disassembler, and data table compiler).
2050 Example Code and Data Size: These are the sizes for the OS-independent
2051 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2052 debug version of the code includes the debug output trace mechanism and
2053 has a much larger code and data size.
2056 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2057 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2059 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2060 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2063 2) iASL Compiler/Disassembler and Tools:
2065 iASL: Implemented an ASL grammar extension to allow/enable executable
2066 "module-level code" to be created and executed under the various
2067 operators that create new scopes. This type of AML code is already
2068 supported in all known AML interpreters, and the grammar change will
2069 appear in the next version of the ACPI specification. Simplifies the
2070 conditional runtime creation of named objects under these object types:
2078 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
2079 ease-of-use to the ASL language. The syntax is similar to the
2080 corresponding C operator, and is implemented with the existing AML While
2081 opcode -- thus requiring no changes to existing AML interpreters.
2083 For (Initialize, Predicate, Update) {TermList}
2088 Initializer // Nothing | TermArg => ComputationalData
2089 Predicate // Nothing | TermArg => ComputationalData
2090 Update // Nothing | TermArg => ComputationalData
2094 iASL: The _HID/_ADR detection and validation has been enhanced to search
2095 under conditionals in order to allow these objects to be conditionally
2098 iASL: Fixed several issues with the constant folding feature. The
2099 improvement allows better detection and resolution of statements that can
2100 be folded at compile time. ACPICA BZ 1266.
2102 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
2103 conversion to the ASL ElseIf operator where incorrect ASL code could be
2106 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
2107 sometimes an extra (and extraneous) set of parentheses were emitted for
2108 some combinations of operators. Although this did not cause any problems
2109 with recompilation of the disassembled code, it made the code more
2110 difficult to read. David Box. ACPICA BZ 1231.
2112 iASL: Changed to ignore the unreferenced detection for predefined names
2113 of resource descriptor elements, when the resource descriptor is
2114 created/defined within a control method.
2116 iASL: Disassembler: Fix a possible fault with externally declared Buffer
2119 ----------------------------------------
2120 18 March 2016. Summary of changes for version 20160318:
2122 1) ACPICA kernel-resident subsystem:
2124 Added support for arbitrary bit lengths and bit offsets for registers
2125 defined by the Generic Address Structure. Previously, only aligned bit
2126 lengths of 8/16/32/64 were supported. This was sufficient for many years,
2127 but recently some machines have been seen that require arbitrary bit-
2128 level support. ACPICA BZ 1240. Lv Zheng.
2130 Fixed an issue where the \_SB._INI method sometimes must be evaluated
2131 before any _REG methods are evaluated. Lv Zheng.
2133 Implemented several changes related to ACPI table support
2134 (Headers/Disassembler/TableCompiler):
2135 NFIT: For ACPI 6.1, updated to add some additional new fields and
2137 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
2139 DMAR: Added new constants per the 10/2014 DMAR spec.
2140 IORT: Added new subtable per the 10/2015 IORT spec.
2141 HEST: For ACPI 6.1, added new constants and new subtable.
2142 DBG2: Added new constants per the 12/2015 DBG2 spec.
2143 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
2145 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
2147 Updated header support for the DMAR table to match the current version of
2150 Added extensions to the ASL Concatenate operator to allow any ACPI object
2151 to be passed as an operand. Any object other than Integer/String/Buffer
2152 simply returns a string containing the object type. This extends the
2153 usefulness of the Printf macros. Previously, Concatenate would abort the
2154 control method if a non-data object was encountered.
2156 ACPICA source code: Deployed the C "const" keyword across the source code
2157 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
2159 Example Code and Data Size: These are the sizes for the OS-independent
2160 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2161 debug version of the code includes the debug output trace mechanism and
2162 has a much larger code and data size.
2165 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2166 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2168 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2169 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2172 2) iASL Compiler/Disassembler and Tools:
2174 iASL/Disassembler: Improved the heuristic used to determine the number of
2175 arguments for an externally defined control method (a method in another
2176 table). Although this is an improvement, there is no deterministic way to
2177 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
2178 will completely solve this problem as it is deployed (automatically) in
2181 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
2182 statements that could cause errors when the disassembled file is
2183 compiled. ACPICA BZ 1243. David Box.
2185 iASL: Fixed a regression caused by the merger of the two versions of the
2186 local strtoul64. Because of a dependency on a global variable, strtoul64
2187 could return an error for integers greater than a 32-bit value. ACPICA BZ
2190 iASL: Fixed a regression where a fault could occur for an ASL Return
2191 statement if it invokes a control method that is not resolved. ACPICA BZ
2194 AcpiXtract: Improved input file validation: detection of binary files and
2195 non-acpidump text files.
2197 ----------------------------------------
2198 12 February 2016. Summary of changes for version 20160212:
2200 1) ACPICA kernel-resident subsystem:
2202 Implemented full support for the ACPI 6.1 specification (released in
2203 January). This version of the specification is available at:
2204 http://www.uefi.org/specifications
2206 Only a relatively small number of changes were required in ACPICA to
2207 support ACPI 6.1, in these areas:
2208 - New predefined names
2210 - A new subtable for HEST
2211 - A few other header changes for new values
2213 Ensure \_SB_._INI is executed before any _REG methods are executed. There
2214 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
2216 Reverted a change made in version 20151218 which enabled method
2217 invocations to be targets of various ASL operators (SuperName and Target
2218 grammar elements). While the new behavior is supported by the ACPI
2219 specification, other AML interpreters do not support this behavior and
2220 never will. The ACPI specification will be updated for ACPI 6.2 to remove
2221 this support. Therefore, the change was reverted to the original ACPICA
2224 ACPICA now supports the GCC 6 compiler.
2226 Current Release: (Note: build changes increased sizes)
2227 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2228 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2230 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2231 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
2234 2) iASL Compiler/Disassembler and Tools:
2236 Completed full support for the ACPI 6.0 External() AML opcode. The
2237 compiler emits an external AML opcode for each ASL External statement.
2238 This opcode is used by the disassembler to assist with the disassembly of
2239 external control methods by specifying the required number of arguments
2240 for the method. AML interpreters do not use this opcode. To ensure that
2241 interpreters do not even see the opcode, a block of one or more external
2242 opcodes is surrounded by an "If(0)" construct. As this feature becomes
2243 commonly deployed in BIOS code, the ability of disassemblers to correctly
2244 disassemble AML code will be greatly improved. David Box.
2246 iASL: Implemented support for an optional cross-reference output file.
2247 The -lx option will create a the cross-reference file with the suffix
2248 "xrf". Three different types of cross-reference are created in this file:
2249 - List of object references made from within each control method
2250 - Invocation (caller) list for each user-defined control method
2251 - List of references to each non-method object in the namespace
2253 iASL: Method invocations as ASL Target operands are now disallowed and
2254 flagged as errors in preparation for ACPI 6.2 (see the description of the
2257 ----------------------------------------
2258 8 January 2016. Summary of changes for version 20160108:
2260 1) ACPICA kernel-resident subsystem:
2262 Updated all ACPICA copyrights and signons to 2016: Added the 2016
2263 copyright to all source code module headers and utility/tool signons.
2264 This includes the standard Linux dual-license header. This affects
2265 virtually every file in the ACPICA core subsystem, iASL compiler, all
2266 ACPICA utilities, and the ACPICA test suite.
2268 Fixed a regression introduced in version 20151218 concerning the
2269 execution of so-called module-level ASL/AML code. Namespace objects
2270 created under a module-level If() construct were not properly/fully
2271 entered into the namespace and could cause an interpreter fault when
2274 Example Code and Data Size: These are the sizes for the OS-independent
2275 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2276 debug version of the code includes the debug output trace mechanism and
2277 has a much larger code and data size.
2280 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2281 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
2283 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2284 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2287 2) iASL Compiler/Disassembler and Tools:
2289 Fixed a problem with the compilation of the GpioIo and GpioInt resource
2290 descriptors. The _PIN field name was incorrectly defined to be an array
2291 of 32-bit values, but the _PIN values are in fact 16 bits each. This
2292 would cause incorrect bit width warnings when using Word (16-bit) fields
2293 to access the descriptors.
2296 ----------------------------------------
2297 18 December 2015. Summary of changes for version 20151218:
2299 1) ACPICA kernel-resident subsystem:
2301 Implemented per-AML-table execution of "module-level code" as individual
2302 ACPI tables are loaded into the namespace during ACPICA initialization.
2303 In other words, any module-level code within an AML table is executed
2304 immediately after the table is loaded, instead of batched and executed
2305 after all of the tables have been loaded. This provides compatibility
2306 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
2309 To fully support the feature above, the default operation region handlers
2310 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
2311 installed before any ACPI tables are loaded. This enables module-level
2312 code to access these address spaces during the table load and module-
2313 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
2316 Implemented several changes to the internal _REG support in conjunction
2317 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
2318 utilities for the changes above. Although these tools were changed, host
2319 operating systems that simply use the default handlers for SystemMemory,
2320 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
2322 For example, in the code below, DEV1 is conditionally added to the
2323 namespace by the DSDT via module-level code that accesses an operation
2324 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
2325 created immediately after the DSDT is loaded in order for the SSDT to
2326 successfully reference DEV1. Previously, this code would cause an
2327 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
2328 fully supported by ACPICA.
2330 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
2332 OperationRegion (OPR1, SystemMemory, 0x400, 32)
2333 Field (OPR1, AnyAcc, NoLock, Preserve)
2344 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
2346 External (\DEV1, DeviceObj)
2352 Fixed an AML interpreter problem where control method invocations were
2353 not handled correctly when the invocation was itself a SuperName argument
2354 to another ASL operator. In these cases, the method was not invoked.
2355 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
2360 Decrement, Increment
2363 Signal, Release, Reset
2366 Implemented automatic String-to-ObjectReference conversion support for
2367 packages returned by predefined names (such as _DEP). A common BIOS error
2368 is to add double quotes around an ObjectReference namepath, which turns
2369 the reference into an unexpected string object. This support detects the
2370 problem and corrects it before the package is returned to the caller that
2371 invoked the method. Lv Zheng.
2373 Implemented extensions to the Concatenate operator. Concatenate now
2374 accepts any type of object, it is not restricted to simply
2375 Integer/String/Buffer. For objects other than these 3 basic data types,
2376 the argument is treated as a string containing the name of the object
2377 type. This expands the utility of Concatenate and the Printf/Fprintf
2378 macros. ACPICA BZ 1222.
2380 Cleaned up the output of the ASL Debug object. The timer() value is now
2381 optional and no longer emitted by default. Also, the basic data types of
2382 Integer/String/Buffer are simply emitted as their values, without a data
2383 type string -- since the data type is obvious from the output. ACPICA BZ
2386 Example Code and Data Size: These are the sizes for the OS-independent
2387 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2388 debug version of the code includes the debug output trace mechanism and
2389 has a much larger code and data size.
2392 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2393 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2395 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2396 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2399 2) iASL Compiler/Disassembler and Tools:
2401 iASL: Fixed some issues with the ASL Include() operator. This operator
2402 was incorrectly defined in the iASL parser rules, causing a new scope to
2403 be opened for the code within the include file. This could lead to
2404 several issues, including allowing ASL code that is technically illegal
2405 and not supported by AML interpreters. Note, this does not affect the
2406 related #include preprocessor operator. ACPICA BZ 1212.
2408 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
2409 operator is essentially an ASL macro since there is no AML opcode
2410 associated with it. The code emitted by the iASL compiler for ElseIf is
2411 an Else opcode followed immediately by an If opcode. The disassembler
2412 will now emit an ElseIf if it finds an Else immediately followed by an
2413 If. This simplifies the decoded ASL, especially for deeply nested
2414 If..Else and large Switch constructs. Thus, the disassembled code more
2415 closely follows the original source ASL. ACPICA BZ 1211. Example:
2427 ElseIf (Arg0 == 0x02)
2432 AcpiExec: Added support for the new module level code behavior and the
2433 early region installation. This required a small change to the
2434 initialization, since AcpiExec must install its own operation region
2437 AcpiExec: Added support to make the debug object timer optional. Default
2438 is timer disabled. This cleans up the debug object output -- the timer
2439 data is rarely used.
2441 AcpiExec: Multiple ACPI tables are now loaded in the order that they
2442 appear on the command line. This can be important when there are
2443 interdependencies/references between the tables.
2445 iASL/Templates. Add support to generate template files with multiple
2446 SSDTs within a single output file. Also added ommand line support to
2447 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
2451 ----------------------------------------
2452 24 November 2015. Summary of changes for version 20151124:
2454 1) ACPICA kernel-resident subsystem:
2456 Fixed a possible regression for a previous update to FADT handling. The
2457 FADT no longer has a fixed table ID, causing some issues with code that
2458 was hardwired to a specific ID. Lv Zheng.
2460 Fixed a problem where the method auto-serialization could interfere with
2461 the current SyncLevel. This change makes the auto-serialization support
2462 transparent to the SyncLevel support and management.
2464 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
2465 interface is intended for early access to the namespace during the
2466 initial namespace device discovery walk. The _SUB method has been seen to
2467 access operation regions in some cases, causing errors because the
2468 operation regions are not fully initialized.
2470 AML Debugger: Fixed some issues with the terminate/quit/exit commands
2471 that can cause faults. Lv Zheng.
2473 AML Debugger: Add thread ID support so that single-step mode only applies
2474 to the AML Debugger thread. This prevents runtime errors within some
2477 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
2478 methods that are invoked by this interface are optional, removed warnings
2479 emitted for the case where one or more of these methods do not exist.
2480 ACPICA BZ 1208, original change by Prarit Bhargava.
2482 Made a major pass through the entire ACPICA source code base to
2483 standardize formatting that has diverged a bit over time. There are no
2484 functional changes, but this will of course cause quite a few code
2485 differences from the previous ACPICA release.
2487 Example Code and Data Size: These are the sizes for the OS-independent
2488 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2489 debug version of the code includes the debug output trace mechanism and
2490 has a much larger code and data size.
2493 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2494 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2496 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2497 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2500 2) iASL Compiler/Disassembler and Tools:
2502 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
2503 definition blocks within a single ASL file and the resulting AML file.
2504 Support for this type of file was also added to the various tools that
2505 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
2506 example code below shows two definition blocks within the same file:
2508 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
2512 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
2516 iASL: Enhanced typechecking for the Name() operator. All expressions for
2517 the value of the named object must be reduced/folded to a single constant
2518 at compile time, as per the ACPI specification (the AML definition of
2521 iASL: Fixed some code indentation issues for the -ic and -ia options (C
2522 and assembly headers). Now all emitted code correctly begins in column 1.
2524 iASL: Added an error message for an attempt to open a Scope() on an
2525 object defined in an SSDT. The DSDT is always loaded into the namespace
2526 first, so any attempt to open a Scope on an SSDT object will fail at
2530 ----------------------------------------
2531 30 September 2015. Summary of changes for version 20150930:
2533 1) ACPICA kernel-resident subsystem:
2535 Debugger: Implemented several changes and bug fixes to assist support for
2536 the in-kernel version of the AML debugger. Lv Zheng.
2537 - Fix the "predefined" command for in-kernel debugger.
2538 - Do not enter debug command loop for the help and version commands.
2539 - Disallow "execute" command during execution/single-step of a method.
2541 Interpreter: Updated runtime typechecking for all operators that have
2542 target operands. The operand is resolved and validated that it is legal.
2543 For example, the target cannot be a non-data object such as a Device,
2544 Mutex, ThermalZone, etc., as per the ACPI specification.
2546 Debugger: Fixed the double-mutex user I/O handshake to work when local
2547 deadlock detection is enabled.
2549 Debugger: limited display of method locals and arguments (LocalX and
2550 ArgX) to only those that have actually been initialized. This prevents
2551 lines of extraneous output.
2553 Updated the definition of the NFIT table to correct the bit polarity of
2554 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
2556 Example Code and Data Size: These are the sizes for the OS-independent
2557 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2558 debug version of the code includes the debug output trace mechanism and
2559 has a much larger code and data size.
2562 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2563 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2565 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2566 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2569 2) iASL Compiler/Disassembler and Tools:
2571 iASL: Improved the compile-time typechecking for operands of many of the
2574 -- Added an option to disable compiler operand/operator typechecking (-
2577 -- For the following operators, the TermArg operands are now validated
2578 when possible to be Integer data objects: BankField, OperationRegion,
2579 DataTableRegion, Buffer, and Package.
2581 -- Store (Source, Target): Both the source and target operands are
2582 resolved and checked that the operands are both legal. For example,
2583 neither operand can be a non-data object such as a Device, Mutex,
2584 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
2585 operator can be used to store an object to any type of target object.
2587 -- Store (Source, Target): If the source is a Package object, the target
2588 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
2589 is a Package, the source must also be a Package.
2591 -- Store (Source, Target): A warning is issued if the source and target
2592 resolve to the identical named object.
2594 -- Store (Source, <method invocation>): An error is generated for the
2595 target method invocation, as this construct is not supported by the AML
2598 -- For all ASL math and logic operators, the target operand must be a
2599 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
2600 includes the function return value also.
2602 -- External declarations are also included in the typechecking where
2603 possible. External objects defined using the UnknownObj keyword cannot be
2604 typechecked, however.
2606 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
2608 - Legacy code: Index(PKG1, 3)
2609 - New ASL+ code: PKG1[3]
2610 This completes the ACPI 6.0 ASL+ support as it was the only operator not
2613 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
2614 spaces were inadvertently appended to the filename, causing file access
2615 and deletion problems on some systems.
2617 ASL Test Suite (ASLTS): Updated the master makefile to generate all
2618 possible compiler output files when building the test suite -- thus
2619 exercising these features of the compiler. These files are automatically
2620 deleted when the test suite exits.
2623 ----------------------------------------
2624 18 August 2015. Summary of changes for version 20150818:
2626 1) ACPICA kernel-resident subsystem:
2628 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
2629 Zheng. ACPICA BZ 1186.
2631 Completed development to ensure that the ACPICA Disassembler and Debugger
2632 are fully standalone components of ACPICA. Removed cross-component
2633 dependences. Lv Zheng.
2635 The max-number-of-AML-loops is now runtime configurable (previously was
2636 compile-time only). This is essentially a loop timeout to force-abort
2637 infinite AML loops. ACPCIA BZ 1192.
2639 Debugger: Cleanup output to dump ACPI names and namepaths without any
2640 trailing underscores. Lv Zheng. ACPICA BZ 1135.
2642 Removed unnecessary conditional compilations across the Debugger and
2643 Disassembler components where entire modules could be left uncompiled.
2645 The aapits test is deprecated and has been removed from the ACPICA git
2646 tree. The test has never been completed and has not been maintained, thus
2647 becoming rather useless. ACPICA BZ 1015, 794.
2649 A batch of small changes to close bugzilla and other reports:
2650 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
2651 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
2652 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
2653 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
2655 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
2657 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
2659 - Debugger: Split debugger initialization/termination interfaces. Lv
2661 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
2663 - AcpiExec: Add debug message during _REG method phase during table
2665 - AcpiNames: Fix a regression where some output was missing and no longer
2667 - Debugger: General cleanup and simplification. Lv Zheng.
2668 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
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: 101.3K Code, 27.7K Data, 129.0K Total
2677 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2679 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2680 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2683 2) iASL Compiler/Disassembler and Tools:
2685 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
2686 were not handled properly and caused load errors. Now, properly invoke
2687 and use the ACPICA auto-reallocate mechanism for ACPI table data
2688 structures. ACPICA BZ 1188
2690 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
2693 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
2694 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
2695 executed during initialization. ACPICA BZ 1187, 1189.
2697 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
2698 that corresponds to each disassembled ASL statement, to simplify
2699 debugging. ACPICA BZ 1191.
2701 Debugger: Add option to the "objects" command to display a summary of the
2702 current namespace objects (Object type and count). This is displayed if
2703 the command is entered with no arguments.
2705 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
2708 ----------------------------------------
2709 17 July 2015. Summary of changes for version 20150717:
2711 1) ACPICA kernel-resident subsystem:
2713 Improved the partitioning between the Debugger and Disassembler
2714 components. This allows the Debugger to be used standalone within kernel
2715 code without the Disassembler (which is used for single stepping also).
2716 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
2718 Debugger: Implemented a new command to trace the execution of control
2719 methods (Trace). This is especially useful for the in-kernel version of
2720 the debugger when file I/O may not be available for method trace output.
2721 See the ACPICA reference for more information. Lv Zheng.
2723 Moved all C library prototypes (used for the local versions of these
2724 functions when requested) to a new header, acclib.h
2725 Cleaned up the use of non-ANSI C library functions. These functions are
2726 implemented locally in ACPICA. Moved all such functions to a common
2727 source file, utnonansi.c
2729 Debugger: Fixed a problem with the "!!" command (get last command
2730 executed) where the debugger could enter an infinite loop and eventually
2733 Removed the use of local macros that were used for some of the standard C
2734 library functions to automatically cast input parameters. This mostly
2735 affected the is* functions where the input parameter is defined to be an
2736 int. This required a few modifications to the main ACPICA source code to
2737 provide casting for these functions and eliminate possible compiler
2738 warnings for these parameters.
2740 Across the source code, added additional status/error checking to resolve
2741 issues discovered by static source code analysis tools such as Coverity.
2743 Example Code and Data Size: These are the sizes for the OS-independent
2744 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2745 debug version of the code includes the debug output trace mechanism and
2746 has a much larger code and data size.
2749 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2750 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2752 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2753 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2756 2) iASL Compiler/Disassembler and Tools:
2758 iASL: Fixed a regression where the device map file feature no longer
2759 worked properly when used in conjunction with the disassembler. It only
2760 worked properly with the compiler itself.
2762 iASL: Implemented a new warning for method LocalX variables that are set
2763 but never used (similar to a C compiler such as gcc). This also applies
2764 to ArgX variables that are not defined by the parent method, and are
2765 instead (legally) used as local variables.
2767 iASL/Preprocessor: Finished the pass-through of line numbers from the
2768 preprocessor to the compiler. This ensures that compiler errors/warnings
2769 have the correct original line numbers and filenames, regardless of any
2772 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
2773 pass-through of comments to the preprocessor output file (which becomes
2774 the compiler input file). Also fixed a problem with // comments that
2775 appear after a math expression.
2777 iASL: Added support for the TCPA server table to the table compiler and
2778 template generator. (The client table was already previously supported)
2780 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
2781 identify the iASL compiler.
2783 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
2784 multiple times. The new names are ACPI_SIGN_NEGATIVE and
2787 AcpiHelp: Update to expand help messages for the iASL preprocessor
2791 ----------------------------------------
2792 19 June 2015. Summary of changes for version 20150619:
2794 Two regressions in version 20150616 have been addressed:
2796 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
2797 etc.) This update changes ACPICA to only use the standard headers for
2798 functions, or the prototypes for the local versions of the C library
2799 functions. Across the source code, this required some additional casts
2800 for some Clib invocations for portability. Moved all local prototypes to
2801 a new file, acclib.h
2803 Fixes several problems with recent changes to the handling of the FACS
2804 table that could cause some systems not to boot.
2807 ----------------------------------------
2808 16 June 2015. Summary of changes for version 20150616:
2811 1) ACPICA kernel-resident subsystem:
2813 Across the entire ACPICA source code base, the various macros for the C
2814 library functions (such as ACPI_STRLEN, etc.) have been removed and
2815 replaced by the standard C library names (strlen, etc.) The original
2816 purpose for these macros is no longer applicable. This simplification
2817 reduces the number of macros used in the ACPICA source code
2818 significantly, improving readability and maintainability.
2820 Implemented support for a new ACPI table, the OSDT. This table, the
2821 "override" SDT, can be loaded directly by the host OS at boot time. It
2822 enables the replacement of existing namespace objects that were installed
2823 via the DSDT and/or SSDTs. The primary purpose for this is to replace
2824 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
2825 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
2828 Added support for systems with (improperly) two FACS tables -- a "32-bit"
2829 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
2830 X field). This change will support both automatically. There continues to
2831 be systems found with this issue. This support requires a change to the
2832 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
2833 been added to allow the host to select which FACS is desired
2834 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
2837 Added a new feature to allow for systems that do not contain an FACS.
2838 Although this is already supported on hardware-reduced platforms, the
2839 feature has been extended for all platforms. The reasoning is that we do
2840 not want to abort the entire ACPICA initialization just because the
2841 system is seriously buggy and has no FACS.
2843 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
2844 not correctly transcribed from the ACPI specification in ACPICA version
2847 Implemented support for the _CLS object in the AcpiGetObjectInfo external
2850 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
2851 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
2852 compiler also updated. Note: The TCPA "server" table is not supported by
2853 the disassembler/table-compiler at this time.
2855 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
2857 Example Code and Data Size: These are the sizes for the OS-independent
2858 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2859 debug version of the code includes the debug output trace mechanism and
2860 has a much larger code and data size.
2863 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2864 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2866 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2867 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2870 2) iASL Compiler/Disassembler and Tools:
2872 Disassembler: Fixed a problem with the new symbolic operator disassembler
2873 where incorrect ASL code could be emitted in some cases for the "non-
2874 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
2875 ShiftRight. The actual problem cases seem to be rather unusual in common
2876 ASL code, however. David Box.
2878 Modified the linux version of acpidump to obtain ACPI tables from not
2879 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
2882 iASL: Fixed a problem where the user preprocessor output file (.i)
2883 contained extra data that was not expected. The compiler was using this
2884 file as a temporary file and passed through #line directives in order to
2885 keep compiler error messages in sync with the input file and line number
2886 across multiple include files. The (.i) is no longer a temporary file as
2887 the compiler uses a new, different file for the original purpose.
2889 iASL: Fixed a problem where comments within the original ASL source code
2890 file were not passed through to the preprocessor output file, nor any
2893 iASL: Fixed some issues for the handling of the "#include" preprocessor
2894 directive and the similar (but not the same) "Include" ASL operator.
2896 iASL: Add support for the new OSDT in both the disassembler and compiler.
2898 iASL: Fixed a problem with the constant folding support where a Buffer
2899 object could be incorrectly generated (incorrectly formed) during a
2900 conversion to a Store() operator.
2902 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
2903 description text for the _REV predefined name. _REV now permanently
2904 returns 2, as per the ACPI 6.0 specification.
2906 Debugger: Enhanced the output of the Debug ASL object for references
2907 produced by the Index operator. For Buffers and strings, only output the
2908 actual byte pointed to by the index. For packages, only print the single
2909 package element decoded by the index. Previously, the entire
2910 buffer/string/package was emitted.
2912 iASL/Table-compiler: Fixed a regression where the "generic" data types
2913 were no longer recognized, causing errors.
2916 ----------------------------------------
2917 15 May 2015. Summary of changes for version 20150515:
2919 This release implements most of ACPI 6.0 as described below.
2921 1) ACPICA kernel-resident subsystem:
2923 Implemented runtime argument checking and return value checking for all
2924 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
2925 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
2927 Example Code and Data Size: These are the sizes for the OS-independent
2928 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2929 debug version of the code includes the debug output trace mechanism and
2930 has a much larger code and data size.
2933 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2934 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2936 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2937 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2940 2) iASL Compiler/Disassembler and Tools:
2942 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
2943 names (argument count validation and return value typechecking.)
2945 iASL disassembler and table compiler: implemented support for all new
2946 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
2948 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
2951 iASL preprocessor: Added a new directive to enable inclusion of binary
2952 blobs into ASL code. The new directive is #includebuffer. It takes a
2953 binary file as input and emits a named ascii buffer object into the ASL
2956 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
2958 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
2961 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
2965 ----------------------------------------
2966 10 April 2015. Summary of changes for version 20150410:
2968 Reverted a change introduced in version 20150408 that caused
2969 a regression in the disassembler where incorrect operator
2970 symbols could be emitted.
2973 ----------------------------------------
2974 08 April 2015. Summary of changes for version 20150408:
2977 1) ACPICA kernel-resident subsystem:
2979 Permanently set the return value for the _REV predefined name. It now
2980 returns 2 (was 5). This matches other ACPI implementations. _REV will be
2981 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
2982 for ACPI 2.0 and later. It should never be used to differentiate or
2983 identify operating systems.
2985 Added the "Windows 2015" string to the _OSI support. ACPICA will now
2986 return TRUE to a query with this string.
2988 Fixed several issues with the local version of the printf function.
2990 Added the C99 compiler option (-std=c99) to the Unix makefiles.
2993 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
2994 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
2996 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2997 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3000 2) iASL Compiler/Disassembler and Tools:
3002 iASL: Implemented an enhancement to the constant folding feature to
3003 transform the parse tree to a simple Store operation whenever possible:
3004 Add (2, 3, X) ==> is converted to: Store (5, X)
3005 X = 2 + 3 ==> is converted to: Store (5, X)
3007 Updated support for the SLIC table (Software Licensing Description Table)
3008 in both the Data Table compiler and the disassembler. The SLIC table
3009 support now conforms to "Microsoft Software Licensing Tables (SLIC and
3010 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
3011 following the ACPI header is now defined to be "Proprietary Data", and as
3012 such, can only be entered or displayed as a hex data block.
3014 Implemented full support for the MSDM table as described in the document
3015 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
3016 following the ACPI header is defined to be "Proprietary Data", and can
3017 only be entered or displayed as a hex data block.
3019 Implemented the -Pn option for the iASL Table Compiler (was only
3020 implemented for the ASL compiler). This option disables the iASL
3023 Disassembler: For disassembly of Data Tables, added a comment field
3024 around the Ascii equivalent data that is emitted as part of the "Raw
3025 Table Data" block. This prevents the iASL Preprocessor from possible
3026 confusion if/when the table is compiled.
3028 Disassembler: Added an option (-df) to force the disassembler to assume
3029 that the table being disassembled contains valid AML. This feature is
3030 useful for disassembling AML files that contain ACPI signatures other
3031 than DSDT or SSDT (such as OEMx or other signatures).
3033 Changes for the EFI version of the tools:
3034 1) Fixed a build error/issue
3035 2) Fixed a cast warning
3037 iASL: Fixed a path issue with the __FILE__ operator by making the
3038 directory prefix optional within the internal SplitInputFilename
3041 Debugger: Removed some unused global variables.
3043 Tests: Updated the makefile for proper generation of the AAPITS suite.
3046 ----------------------------------------
3047 04 February 2015. Summary of changes for version 20150204:
3049 ACPICA kernel-resident subsystem:
3051 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3052 copyright to all module headers and signons, including the standard Linux
3053 header. This affects virtually every file in the ACPICA core subsystem,
3054 iASL compiler, all ACPICA utilities, and the test suites.
3056 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
3057 A raw gpe handling mechanism was created to allow better handling of GPE
3058 storms that aren't easily managed by the normal handler. The raw handler
3059 allows disabling/renabling of the the GPE so that interrupt storms can be
3060 avoided in cases where events cannot be timely serviced. In this
3061 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
3062 GPE. This API will leave the reference counts undisturbed, thereby
3063 preventing unintentional clearing of the GPE when the intent in only to
3064 temporarily disable it. Raw handlers allow enabling and disabling of a
3065 GPE by removing GPE register locking. As such, raw handlers much provide
3066 their own locks while using GPE API's to protect access to GPE data
3070 Events: Always modify GPE registers under the GPE lock.
3071 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
3072 values. Reported as bug by joe.liu@apple.com.
3074 Unix makefiles: Separate option to disable optimizations and
3075 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
3076 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
3077 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
3078 errors when building ACPICA. This allows disabling the option without
3079 also having to disable optimazations.
3083 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3084 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
3087 --------------------------------------
3088 07 November 2014. Summary of changes for version 20141107:
3090 This release is available at https://acpica.org/downloads
3092 This release introduces and implements language extensions to ASL that
3093 provide support for symbolic ("C-style") operators and expressions. These
3094 language extensions are known collectively as ASL+.
3097 1) iASL Compiler/Disassembler and Tools:
3099 Disassembler: Fixed a problem with disassembly of the UartSerialBus
3100 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
3103 Disassembler: Fixed the Unicode macro support to add escape sequences.
3104 All non-printable ASCII values are emitted as escape sequences, as well
3105 as the standard escapes for quote and backslash. Ensures that the
3106 disassembled macro can be correctly recompiled.
3108 iASL: Added Printf/Fprintf macros for formatted output. These macros are
3109 translated to existing AML Concatenate and Store operations. Printf
3110 writes to the ASL Debug object. Fprintf allows the specification of an
3111 ASL name as the target. Only a single format specifier is required, %o,
3112 since the AML interpreter dynamically converts objects to the required
3115 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3116 (Concatenate (Concatenate (Concatenate ("", Arg0),
3117 ": Unexpected value for "), Arg1), ", "), Arg2),
3118 " at line "), Arg3), Debug)
3120 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
3121 Arg0, Arg1, Arg2, Arg3)
3123 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3124 ("", Arg1), ": "), Arg0), " Successful"), STR1)
3126 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
3128 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
3129 ASL parse tree before the AML code is generated. This allows blocks of
3130 ASL code to be removed in order to help locate and identify problem
3131 devices and/or code. David E. Box.
3133 AcpiExec: Added support (-fi) for an optional namespace object
3134 initialization file. This file specifies initial values for namespace
3135 objects as necessary for debugging and testing different ASL code paths
3136 that may be taken as a result of BIOS options.
3139 2) Overview of symbolic operator support for ASL (ASL+)
3140 -------------------------------------------------------
3142 As an extension to the ASL language, iASL implements support for symbolic
3143 (C-style) operators for math and logical expressions. This can greatly
3144 simplify ASL code as well as improve both readability and
3145 maintainability. These language extensions can exist concurrently with
3146 all legacy ASL code and expressions.
3148 The symbolic extensions are 100% compatible with existing AML
3149 interpreters, since no new AML opcodes are created. To implement the
3150 extensions, the iASL compiler transforms the symbolic expressions into
3151 the legacy ASL/AML equivalents at compile time.
3153 Full symbolic expressions are supported, along with the standard C
3154 precedence and associativity rules.
3156 Full disassembler support for the symbolic expressions is provided, and
3157 creates an automatic migration path for existing ASL code to ASL+ code
3158 via the disassembly process. By default, the disassembler now emits ASL+
3159 code with symbolic expressions. An option (-dl) is provided to force the
3160 disassembler to emit legacy ASL code if desired.
3162 Below is the complete list of the currently supported symbolic operators
3163 with examples. See the iASL User Guide for additional information.
3166 ASL+ Syntax Legacy ASL Equivalent
3167 ----------- ---------------------
3171 Z = X + Y Add (X, Y, Z)
3172 Z = X - Y Subtract (X, Y, Z)
3173 Z = X * Y Multiply (X, Y, Z)
3174 Z = X / Y Divide (X, Y, , Z)
3175 Z = X % Y Mod (X, Y, Z)
3176 Z = X << Y ShiftLeft (X, Y, Z)
3177 Z = X >> Y ShiftRight (X, Y, Z)
3178 Z = X & Y And (X, Y, Z)
3179 Z = X | Y Or (X, Y, Z)
3180 Z = X ^ Y Xor (X, Y, Z)
3185 // Logical operators
3187 (X == Y) LEqual (X, Y)
3188 (X != Y) LNotEqual (X, Y)
3189 (X < Y) LLess (X, Y)
3190 (X > Y) LGreater (X, Y)
3191 (X <= Y) LLessEqual (X, Y)
3192 (X >= Y) LGreaterEqual (X, Y)
3193 (X && Y) LAnd (X, Y)
3197 // Assignment and compound assignment operations
3200 X += Y Add (X, Y, X)
3201 X -= Y Subtract (X, Y, X)
3202 X *= Y Multiply (X, Y, X)
3203 X /= Y Divide (X, Y, , X)
3204 X %= Y Mod (X, Y, X)
3205 X <<= Y ShiftLeft (X, Y, X)
3206 X >>= Y ShiftRight (X, Y, X)
3207 X &= Y And (X, Y, X)
3209 X ^= Y Xor (X, Y, X)
3216 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
3217 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
3219 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
3221 And (MEMB, 0xFFFFFFF0, SRMB)
3222 Store (MEMB, Local2)
3223 Store (PDBM, Local1)
3224 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
3226 Or (PDBM, 0x02, PDBM)
3230 If (((R510 & 0x03FB) == 0x02E0) ||
3231 ((R520 & 0x03FB) == 0x02E0) ||
3232 ((R530 & 0x03FB) == 0x02E0) ||
3233 ((R540 & 0x03FB) == 0x02E0))
3235 SRMB = (MEMB & 0xFFFFFFF0)
3238 PDBM &= 0xFFFFFFFFFFFFFFF9
3244 Store (0x1234, Local1)
3245 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
3246 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
3247 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
3248 Store (Index (PKG1, 0x03), Local6)
3249 Store (Add (Local3, Local2), Debug)
3250 Add (Local1, 0x0F, Local2)
3251 Add (Local1, Multiply (Local2, Local3), Local2)
3252 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
3256 Local3 = (((Local1 + TEST) + 0x20) * Local2)
3257 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
3258 Local3 = (Local1 + (TEST + (0x20 * Local2)))
3259 Local6 = Index (PKG1, 0x03)
3260 Debug = (Local3 + Local2)
3261 Local2 = (Local1 + 0x0F)
3262 Local2 = (Local1 + (Local2 * Local3))
3263 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
3266 ----------------------------------------
3267 26 September 2014. Summary of changes for version 20140926:
3269 1) ACPICA kernel-resident subsystem:
3271 Updated the GPIO operation region handler interface (GeneralPurposeIo).
3272 In order to support GPIO Connection objects with multiple pins, along
3273 with the related Field objects, the following changes to the interface
3274 have been made: The Address is now defined to be the offset in bits of
3275 the field unit from the previous invocation of a Connection. It can be
3276 viewed as a "Pin Number Index" into the connection resource descriptor.
3277 The BitWidth is the exact bit width of the field. It is usually one bit,
3278 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
3279 additional information and examples.
3281 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
3282 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
3283 by the firmware), so that they cannot fire until they are enabled via
3284 AcpiUpdateAllGpes. Rafael J. Wysocki.
3286 Added a new return flag for the Event/GPE status interfaces --
3287 AcpiGetEventStatus and AcpiGetGpeStatus. The new
3288 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
3289 GPE currently has a handler associated with it, and can thus actually
3290 affect the system. Lv Zheng.
3292 Example Code and Data Size: These are the sizes for the OS-independent
3293 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3294 debug version of the code includes the debug output trace mechanism and
3295 has a much larger code and data size.
3298 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
3299 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
3301 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3302 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3304 2) iASL Compiler/Disassembler and Tools:
3306 iASL: Fixed a memory allocation/free regression introduced in 20140828
3307 that could cause the compiler to crash. This was introduced inadvertently
3308 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
3311 iASL: Removed two error messages that have been found to create false
3312 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
3313 1) Illegal forward reference within a method
3314 2) Illegal reference across two methods
3316 iASL: Implemented a new option (-lm) to create a hardware mapping file
3317 that summarizes all GPIO, I2C, SPI, and UART connections. This option
3318 works for both the compiler and disassembler. See the iASL compiler user
3319 guide for additional information and examples (section 6.4.6).
3321 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
3322 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
3323 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
3325 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
3326 unless STDIN is actually a terminal. Assists with batch-mode processing.
3329 Disassembler/AcpiHelp: Added another large group of recognized _HID
3333 ----------------------------------------
3334 28 August 2014. Summary of changes for version 20140828:
3336 1) ACPICA kernel-resident subsystem:
3338 Fixed a problem related to the internal use of the Timer() operator where
3339 a 64-bit divide could cause an attempted link to a double-precision math
3340 library. This divide is not actually necessary, so the code was
3341 restructured to eliminate it. Lv Zheng.
3343 ACPI 5.1: Added support for the runtime validation of the _DSD package
3344 (similar to the iASL support).
3346 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
3347 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
3349 Example Code and Data Size: These are the sizes for the OS-independent
3350 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3351 debug version of the code includes the debug output trace mechanism and
3352 has a much larger code and data size.
3355 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3356 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3358 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
3359 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3361 2) iASL Compiler/Disassembler and Tools:
3363 AcpiExec: Fixed a problem on unix systems where the original terminal
3364 state was not always properly restored upon exit. Seen when using the -v
3365 option. ACPICA BZ 1104.
3367 iASL: Fixed a problem with the validation of the ranges/length within the
3368 Memory24 resource descriptor. There was a boundary condition when the
3369 range was equal to the (length -1) caused by the fact that these values
3370 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
3372 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
3374 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
3376 now supported properly.
3378 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
3379 in the disassembler, data table compiler, and table template generator.
3381 iASL: Added a requirement for Device() objects that one of either a _HID
3382 or _ADR must exist within the scope of a Device, as per the ACPI
3383 specification. Remove a similar requirement that was incorrectly in place
3384 for the _DSD object.
3386 iASL: Added error detection for illegal named references within control
3387 methods that would cause runtime failures. Now trapped as errors are: 1)
3388 References to objects within a non-parent control method. 2) Forward
3389 references (within a method) -- for control methods, AML interpreters use
3390 a one-pass parse of control methods. ACPICA BZ 1008.
3392 iASL: Added error checking for dependencies related to the _PSx power
3393 methods. ACPICA BZ 1029.
3394 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
3396 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
3399 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
3400 deploying the existing object and string caches and adding new caches for
3403 iASL: Split the huge parser source file into multiple subfiles to improve
3404 manageability. Generation now requires the M4 macro preprocessor, which
3405 is part of the Bison distribution on both unix and windows platforms.
3407 AcpiSrc: Fixed and removed all extraneous warnings generated during
3408 entire ACPICA source code scan and/or conversion.
3411 ----------------------------------------
3413 24 July 2014. Summary of changes for version 20140724:
3415 The ACPI 5.1 specification has been released and is available at:
3416 http://uefi.org/specs/access
3419 0) ACPI 5.1 support in ACPICA:
3421 ACPI 5.1 is fully supported in ACPICA as of this release.
3423 New predefined names. Support includes iASL and runtime ACPICA
3425 _CCA (Cache Coherency Attribute).
3426 _DSD (Device-Specific Data). David Box.
3428 Modifications to existing ACPI tables. Support includes headers, iASL
3429 Data Table compiler, disassembler, and the template generator.
3430 FADT - New fields and flags. Graeme Gregory.
3431 GTDT - One new subtable and new fields. Tomasz Nowicki.
3432 MADT - Two new subtables. Tomasz Nowicki.
3433 PCCT - One new subtable.
3436 New notification type for System Resource Affinity change events.
3439 1) ACPICA kernel-resident subsystem:
3441 Fixed a regression introduced in 20140627 where a fault can happen during
3442 the deletion of Alias AML namespace objects. The problem affected both
3443 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
3445 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
3446 simple mechanism to enable wake GPEs that have no associated handler or
3447 control method. Rafael Wysocki.
3449 Updated the AcpiEnableGpe interface to disallow the enable if there is no
3450 handler or control method associated with the particular GPE. This will
3451 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
3453 Updated GPE handling and dispatch by disabling the GPE before clearing
3454 the status bit for edge-triggered GPEs. Lv Zheng.
3456 Added Timer() support to the AML Debug object. The current timer value is
3457 now displayed with each invocation of (Store to) the debug object to
3458 enable simple generation of execution times for AML code (method
3459 execution for example.) ACPICA BZ 1093.
3461 Example Code and Data Size: These are the sizes for the OS-independent
3462 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3463 debug version of the code includes the debug output trace mechanism and
3464 has a much larger code and data size.
3467 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
3468 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3470 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3471 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3474 2) iASL Compiler/Disassembler and Tools:
3476 Fixed an issue with the recently added local printf implementation,
3477 concerning width/precision specifiers that could cause incorrect output.
3478 Lv Zheng. ACPICA BZ 1094.
3480 Disassembler: Added support to detect buffers that contain UUIDs and
3481 disassemble them to an invocation of the ToUUID operator. Also emit
3482 commented descriptions of known ACPI-related UUIDs.
3484 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
3485 -u. Adds three new files.
3487 iASL: Update table compiler and disassembler for DMAR table changes that
3488 were introduced in September 2013. With assistance by David Woodhouse.
3490 ----------------------------------------
3491 27 June 2014. Summary of changes for version 20140627:
3493 1) ACPICA kernel-resident subsystem:
3495 Formatted Output: Implemented local versions of standard formatted output
3496 utilities such as printf, etc. Over time, it has been discovered that
3497 there are in fact many portability issues with printf, and the addition
3498 of this feature will fix/prevent these issues once and for all. Some
3499 known issues are summarized below:
3501 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
3502 for the Linux kernel and is %uI64 for some MSVC versions.
3503 2) Invoking printf consistently in a manner that is portable across both
3504 32-bit and 64-bit platforms is difficult at best in many situations.
3505 3) The output format for pointers varies from system to system (leading
3506 zeros especially), and leads to inconsistent output from ACPICA across
3508 4) Certain platform-specific printf formats may conflict with ACPICA use.
3509 5) If there is no local C library available, ACPICA now has local support
3512 -- To address these printf issues in a complete manner, ACPICA now
3513 directly implements a small subset of printf format specifiers, only
3514 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
3516 Implemented support for ACPICA generation within the EFI environment.
3517 Initially, the AcpiDump utility is supported in the UEFI shell
3518 environment. Lv Zheng.
3520 Added a new external interface, AcpiLogError, to improve ACPICA
3521 portability. This allows the host to redirect error messages from the
3522 ACPICA utilities. Lv Zheng.
3524 Added and deployed new OSL file I/O interfaces to improve ACPICA
3532 There are C library implementations of these functions in the new file
3533 service_layers/oslibcfs.c -- however, the functions can be implemented by
3534 the local host in any way necessary. Lv Zheng.
3536 Implemented a mechanism to disable/enable ACPI table checksum validation
3537 at runtime. This can be useful when loading tables very early during OS
3538 initialization when it may not be possible to map the entire table in
3539 order to compute the checksum. Lv Zheng.
3541 Fixed a buffer allocation issue for the Generic Serial Bus support.
3542 Originally, a fixed buffer length was used. This change allows for
3543 variable-length buffers based upon the protocol indicated by the field
3544 access attributes. Reported by Lan Tianyu. Lv Zheng.
3546 Fixed a problem where an object detached from a namespace node was not
3547 properly terminated/cleared and could cause a circular list problem if
3548 reattached. ACPICA BZ 1063. David Box.
3550 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
3552 Fixed a possible memory leak in an error return path within the function
3553 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
3555 Example Code and Data Size: These are the sizes for the OS-independent
3556 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3557 debug version of the code includes the debug output trace mechanism and
3558 has a much larger code and data size.
3561 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3562 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3564 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3565 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3568 2) iASL Compiler/Disassembler and Tools:
3570 Disassembler: Add dump of ASCII equivalent text within a comment at the
3571 end of each line of the output for the Buffer() ASL operator.
3573 AcpiDump: Miscellaneous changes:
3574 Fixed repetitive table dump in -n mode.
3575 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
3576 the ACPI 2.0 GUID fails.
3578 iASL: Fixed a problem where the compiler could fault if incorrectly given
3579 an acpidump output file as input. ACPICA BZ 1088. David Box.
3581 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
3582 they are invoked without any arguments.
3584 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
3585 1086. Colin Ian King.
3587 Disassembler: Cleaned up a block of code that extracts a parent Op
3588 object. Added a comment that explains that the parent is guaranteed to be
3589 valid in this case. ACPICA BZ 1069.
3592 ----------------------------------------
3593 24 April 2014. Summary of changes for version 20140424:
3595 1) ACPICA kernel-resident subsystem:
3597 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
3598 Some of these tables are known to contain a trailing NULL entry. Lv
3601 Removed an extraneous error message for the case where there are a large
3602 number of system GPEs (> 124). This was the "32-bit FADT register is too
3603 long to convert to GAS struct" message, which is irrelevant for GPEs
3604 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
3605 (limited capacity) GAS bit length. Also, several changes to ensure proper
3606 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
3609 Implemented and deployed additional configuration support for the public
3610 ACPICA external interfaces. Entire classes of interfaces can now be
3611 easily modified or configured out, replaced by stubbed inline functions
3612 by default. Lv Zheng.
3614 Moved all public ACPICA runtime configuration globals to the public
3615 ACPICA external interface file for convenience. Also, removed some
3616 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
3618 Documentation: Added a new section to the ACPICA reference describing the
3619 maximum number of GPEs that can be supported by the FADT-defined GPEs in
3620 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
3623 Example Code and Data Size: These are the sizes for the OS-independent
3624 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3625 debug version of the code includes the debug output trace mechanism and
3626 has a much larger code and data size.
3629 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3630 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3632 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3633 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3636 2) iASL Compiler/Disassembler and Tools:
3638 iASL and disassembler: Add full support for the LPIT table (Low Power
3639 Idle Table). Includes support in the disassembler, data table compiler,
3640 and template generator.
3643 1) Add option to force the use of the RSDT (over the XSDT).
3644 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
3646 iASL: Add check for predefined packages that are too large. For
3647 predefined names that contain subpackages, check if each subpackage is
3648 too large. (Check for too small already exists.)
3650 Debugger: Updated the GPE command (which simulates a GPE by executing the
3651 GPE code paths in ACPICA). The GPE device is now optional, and defaults
3652 to the GPE 0/1 FADT-defined blocks.
3654 Unix application OSL: Update line-editing support. Add additional error
3655 checking and take care not to reset terminal attributes on exit if they
3656 were never set. This should help guarantee that the terminal is always
3657 left in the previous state on program exit.
3660 ----------------------------------------
3661 25 March 2014. Summary of changes for version 20140325:
3663 1) ACPICA kernel-resident subsystem:
3665 Updated the auto-serialize feature for control methods. This feature
3666 automatically serializes all methods that create named objects in order
3667 to prevent runtime errors. The update adds support to ignore the
3668 currently executing AML SyncLevel when invoking such a method, in order
3669 to prevent disruption of any existing SyncLevel priorities that may exist
3670 in the AML code. Although the use of SyncLevels is relatively rare, this
3671 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
3672 appear on some machines starting with the 20140214 release.
3674 Added a new external interface to allow the host to install ACPI tables
3675 very early, before the namespace is even created. AcpiInstallTable gives
3676 the host additional flexibility for ACPI table management. Tables can be
3677 installed directly by the host as if they had originally appeared in the
3678 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
3679 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
3680 with additional internal restructuring and cleanup. See the ACPICA
3681 Reference for interface details. Lv Zheng.
3683 Added validation of the checksum for all incoming dynamically loaded
3684 tables (via external interfaces or via AML Load/LoadTable operators). Lv
3687 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
3688 and GPE handler removal. Restructured calls to eliminate possible race
3689 conditions. Lv Zheng.
3691 Added a warning for the use/execution of the ASL/AML Unload (table)
3692 operator. This will help detect and identify machines that use this
3693 operator if and when it is ever used. This operator has never been seen
3694 in the field and the usage model and possible side-effects of the drastic
3695 runtime action of a full table removal are unknown.
3697 Reverted the use of #pragma push/pop which was introduced in the 20140214
3698 release. It appears that push and pop are not implemented by enough
3699 compilers to make the use of this feature feasible for ACPICA at this
3700 time. However, these operators may be deployed in a future ACPICA
3703 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
3706 Source code generation:
3707 1) Disabled the use of the "strchr" macro for the gcc-specific
3708 generation. For some versions of gcc, this macro can periodically expose
3709 a compiler bug which in turn causes compile-time error(s).
3710 2) Added support for PPC64 compilation. Colin Ian King.
3712 Example Code and Data Size: These are the sizes for the OS-independent
3713 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3714 debug version of the code includes the debug output trace mechanism and
3715 has a much larger code and data size.
3718 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3719 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3721 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3722 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3725 2) iASL Compiler/Disassembler and Tools:
3727 Disassembler: Added several new features to improve the readability of
3728 the resulting ASL code. Extra information is emitted within comment
3729 fields in the ASL code:
3730 1) Known _HID/_CID values are decoded to descriptive text.
3731 2) Standard values for the Notify() operator are decoded to descriptive
3733 3) Target operands are expanded to full pathnames (in a comment) when
3736 Disassembler: Miscellaneous updates for extern() handling:
3737 1) Abort compiler if file specified by -fe option does not exist.
3738 2) Silence unnecessary warnings about argument count mismatches.
3739 3) Update warning messages concerning unresolved method externals.
3740 4) Emit "UnknownObj" keyword for externals whose type cannot be
3744 1) Added the -a option to display both the ASL syntax and the AML
3745 encoding for an input ASL operator. This effectively displays all known
3746 information about an ASL operator with one AcpiHelp invocation.
3747 2) Added substring match support (similar to a wildcard) for the -i
3748 (_HID/PNP IDs) option.
3750 iASL/Disassembler: Since this tool does not yet support execution on big-
3751 endian machines, added detection of endianness and an error message if
3752 execution is attempted on big-endian. Support for big-endian within iASL
3753 is a feature that is on the ACPICA to-be-done list.
3756 1) Remove option to extract binary files from an acpidump; this function
3757 is made obsolete by the AcpiXtract utility.
3758 2) General cleanup of open files and allocated buffers.
3761 ----------------------------------------
3762 14 February 2014. Summary of changes for version 20140214:
3764 1) ACPICA kernel-resident subsystem:
3766 Implemented a new mechanism to proactively prevent problems with ill-
3767 behaved reentrant control methods that create named ACPI objects. This
3768 behavior is illegal as per the ACPI specification, but is nonetheless
3769 frequently seen in the field. Previously, this could lead to an
3770 AE_ALREADY_EXISTS exception if the method was actually entered by more
3771 than one thread. This new mechanism detects such methods at table load
3772 time and marks them "serialized" to prevent reentrancy. A new global
3773 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
3774 feature if desired. This mechanism and global option obsoletes and
3775 supersedes the previous AcpiGbl_SerializeAllMethods option.
3777 Added the "Windows 2013" string to the _OSI support. ACPICA will now
3778 respond TRUE to _OSI queries with this string. It is the stated policy of
3779 ACPICA to add new strings to the _OSI support as soon as possible after
3780 they are defined. See the full ACPICA _OSI policy which has been added to
3781 the utilities/utosi.c file.
3783 Hardened/updated the _PRT return value auto-repair code:
3784 1) Do not abort the repair on a single subpackage failure, continue to
3785 check all subpackages.
3786 2) Add check for the minimum subpackage length (4).
3787 3) Properly handle extraneous NULL package elements.
3789 Added support to avoid the possibility of infinite loops when traversing
3790 object linked lists. Never allow an infinite loop, even in the face of
3791 corrupted object lists.
3793 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
3794 pack(pop) directives to ensure that the ACPICA headers are independent of
3795 compiler settings or other host headers.
3797 Example Code and Data Size: These are the sizes for the OS-independent
3798 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3799 debug version of the code includes the debug output trace mechanism and
3800 has a much larger code and data size.
3803 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3804 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3806 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3807 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3810 2) iASL Compiler/Disassembler and Tools:
3812 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
3813 first reserved field was incorrectly forced to have a value of zero. This
3814 change correctly forces the field to have a value of one. ACPICA BZ 1081.
3816 Debugger: Added missing support for the "Extra" and "Data" subobjects
3817 when displaying object data.
3819 Debugger: Added support to display entire object linked lists when
3820 displaying object data.
3822 iASL: Removed the obsolete -g option to obtain ACPI tables from the
3823 Windows registry. This feature has been superseded by the acpidump
3827 ----------------------------------------
3828 14 January 2014. Summary of changes for version 20140114:
3830 1) ACPICA kernel-resident subsystem:
3832 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3833 copyright to all module headers and signons, including the standard Linux
3834 header. This affects virtually every file in the ACPICA core subsystem,
3835 iASL compiler, all ACPICA utilities, and the test suites.
3837 Improved parameter validation for AcpiInstallGpeBlock. Added the
3839 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
3840 2) There is not already a GPE block attached to the device.
3841 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
3844 Correctly support "references" in the ACPI_OBJECT. This change fixes the
3845 support to allow references (namespace nodes) to be passed as arguments
3846 to control methods via the evaluate object interface. This is probably
3847 most useful for testing purposes, however.
3849 Improved support for 32/64 bit physical addresses in printf()-like
3850 output. This change improves the support for physical addresses in printf
3851 debug statements and other output on both 32-bit and 64-bit hosts. It
3852 consistently outputs the appropriate number of bytes for each host. The
3853 %p specifier is unsatisfactory since it does not emit uniform output on
3854 all hosts/clib implementations (on some, leading zeros are not supported,
3855 leading to difficult-to-read output).
3857 Example Code and Data Size: These are the sizes for the OS-independent
3858 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3859 debug version of the code includes the debug output trace mechanism and
3860 has a much larger code and data size.
3863 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3864 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3866 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3867 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3870 2) iASL Compiler/Disassembler and Tools:
3872 iASL: Fix a possible fault when using the Connection() operator. Fixes a
3873 problem if the parent Field definition for the Connection operator refers
3874 to an operation region that does not exist. ACPICA BZ 1064.
3876 AcpiExec: Load of local test tables is now optional. The utility has the
3877 capability to load some various tables to test features of ACPICA.
3878 However, there are enough of them that the output of the utility became
3879 confusing. With this change, only the required local tables are displayed
3880 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
3881 line specification. This makes the default output simler and easier to
3882 understand. The -el command line option restores the original behavior
3883 for testing purposes.
3885 AcpiExec: Added support for overlapping operation regions. This change
3886 expands the simulation of operation regions by supporting regions that
3887 overlap within the given address space. Supports SystemMemory and
3888 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
3890 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
3891 allows AcpiExec to simulate these address spaces, similar to the current
3892 support for SystemMemory and SystemIO.
3894 Debugger: Added new command to read/write/compare all namespace objects.
3895 The command "test objects" will exercise the entire namespace by writing
3896 new values to each data object, and ensuring that the write was
3897 successful. The original value is then restored and verified.
3899 Debugger: Added the "test predefined" command. This change makes this
3900 test public and puts it under the new "test" command. The test executes
3901 each and every predefined name within the current namespace.
3904 ----------------------------------------
3905 18 December 2013. Summary of changes for version 20131218:
3907 Global note: The ACPI 5.0A specification was released this month. There
3908 are no changes needed for ACPICA since this release of ACPI is an
3909 errata/clarification release. The specification is available at
3913 1) ACPICA kernel-resident subsystem:
3915 Added validation of the XSDT root table if it is present. Some older
3916 platforms contain an XSDT that is ill-formed or otherwise invalid (such
3917 as containing some or all entries that are NULL pointers). This change
3918 adds a new function to validate the XSDT before actually using it. If the
3919 XSDT is found to be invalid, ACPICA will now automatically fall back to
3920 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
3921 ACPICA and enhanced by Lv Zheng and Bob Moore.
3923 Added a runtime option to ignore the XSDT and force the use of the RSDT.
3924 This change adds a runtime option that will force ACPICA to use the RSDT
3925 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
3926 requires that an XSDT be used instead of the RSDT, the XSDT has been
3927 found to be corrupt or ill-formed on some machines. Lv Zheng.
3929 Added a runtime option to favor 32-bit FADT register addresses over the
3930 64-bit addresses. This change adds an option to favor 32-bit FADT
3931 addresses when there is a conflict between the 32-bit and 64-bit versions
3932 of the same register. The default behavior is to use the 64-bit version
3933 in accordance with the ACPI specification. This can now be overridden via
3934 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
3936 During the change above, the internal "Convert FADT" and "Verify FADT"
3937 functions have been merged to simplify the code, making it easier to
3938 understand and maintain. ACPICA BZ 933.
3940 Improve exception reporting and handling for GPE block installation.
3941 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
3942 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
3944 Added helper macros to extract bus/segment numbers from the HEST table.
3945 This change adds two macros to extract the encoded bus and segment
3946 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
3947 Betty Dall <betty.dall@hp.com>
3949 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
3950 by ACPICA. It is not a public macro, so it should have no effect on
3951 existing OSV code. Lv Zheng.
3953 Example Code and Data Size: These are the sizes for the OS-independent
3954 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3955 debug version of the code includes the debug output trace mechanism and
3956 has a much larger code and data size.
3959 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3960 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3962 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3963 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3966 2) iASL Compiler/Disassembler and Tools:
3968 Disassembler: Improved pathname support for emitted External()
3969 statements. This change adds full pathname support for external names
3970 that have been resolved internally by the inclusion of additional ACPI
3971 tables (via the iASL -e option). Without this change, the disassembler
3972 can emit multiple externals for the same object, or it become confused
3973 when the Scope() operator is used on an external object. Overall, greatly
3974 improves the ability to actually recompile the emitted ASL code when
3975 objects a referenced across multiple ACPI tables. Reported by Michael
3976 Tsirkin (mst@redhat.com).
3978 Tests/ASLTS: Updated functional control suite to execute with no errors.
3979 David Box. Fixed several errors related to the testing of the interpreter
3980 slack mode. Lv Zheng.
3982 iASL: Added support to detect names that are declared within a control
3983 method, but are unused (these are temporary names that are only valid
3984 during the time the method is executing). A remark is issued for these
3985 cases. ACPICA BZ 1022.
3987 iASL: Added full support for the DBG2 table. Adds full disassembler,
3988 table compiler, and template generator support for the DBG2 table (Debug
3991 iASL: Added full support for the PCCT table, update the table definition.
3992 Updates the PCCT table definition in the actbl3.h header and adds table
3993 compiler and template generator support.
3995 iASL: Added an option to emit only error messages (no warnings/remarks).
3996 The -ve option will enable only error messages, warnings and remarks are
3997 suppressed. This can simplify debugging when only the errors are
3998 important, such as when an ACPI table is disassembled and there are many
3999 warnings and remarks -- but only the actual errors are of real interest.
4001 Example ACPICA code (source/tools/examples): Updated the example code so
4002 that it builds to an actual working program, not just example code. Added
4003 ACPI tables and execution of an example control method in the DSDT. Added
4004 makefile support for Unix generation.
4007 ----------------------------------------
4008 15 November 2013. Summary of changes for version 20131115:
4010 This release is available at https://acpica.org/downloads
4013 1) ACPICA kernel-resident subsystem:
4015 Resource Manager: Fixed loop termination for the "get AML length"
4016 function. The loop previously had an error termination on a NULL resource
4017 pointer, which can never happen since the loop simply increments a valid
4018 resource pointer. This fix changes the loop to terminate with an error on
4019 an invalid end-of-buffer condition. The problem can be seen as an
4020 infinite loop by callers to AcpiSetCurrentResources with an invalid or
4021 corrupted resource descriptor, or a resource descriptor that is missing
4022 an END_TAG descriptor. Reported by Dan Carpenter
4023 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
4025 Table unload and ACPICA termination: Delete all attached data objects
4026 during namespace node deletion. This fix updates namespace node deletion
4027 to delete the entire list of attached objects (attached via
4028 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
4029 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
4031 ACPICA termination: Added support to delete all objects attached to the
4032 root namespace node. This fix deletes any and all objects that have been
4033 attached to the root node via AcpiAttachData. Previously, none of these
4034 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
4036 Debug output: Do not emit the function nesting level for the in-kernel
4037 build. The nesting level is really only useful during a single-thread
4038 execution. Therefore, only enable this output for the AcpiExec utility.
4039 Also, only emit the thread ID when executing under AcpiExec (Context
4040 switches are still always detected and a message is emitted). ACPICA BZ
4043 Example Code and Data Size: These are the sizes for the OS-independent
4044 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4045 debug version of the code includes the debug output trace mechanism and
4046 has a much larger code and data size.
4049 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
4050 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
4052 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4053 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4056 2) iASL Compiler/Disassembler and Tools:
4058 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
4059 correct portable POSIX header for terminal control functions.
4061 Disassembler: Fixed control method invocation issues related to the use
4062 of the CondRefOf() operator. The problem is seen in the disassembly where
4063 control method invocations may not be disassembled properly if the
4064 control method name has been used previously as an argument to CondRefOf.
4065 The solution is to not attempt to emit an external declaration for the
4066 CondRefOf target (it is not necessary in the first place). This prevents
4067 disassembler object type confusion. ACPICA BZ 988.
4069 Unix Makefiles: Added an option to disable compiler optimizations and the
4070 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
4071 with optimizations (reportedly, gcc 4.4 for example). This change adds a
4072 command line option for make (NOOPT) that disables all compiler
4073 optimizations and the _FORTIFY_SOURCE compiler flag. The default
4074 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
4075 1034. Lv Zheng, Bob Moore.
4077 Tests/ASLTS: Added options to specify individual test cases and modes.
4078 This allows testers running aslts.sh to optionally specify individual
4079 test modes and test cases. Also added an option to disable the forced
4080 generation of the ACPICA tools from source if desired. Lv Zheng.
4082 ----------------------------------------
4083 27 September 2013. Summary of changes for version 20130927:
4085 This release is available at https://acpica.org/downloads
4088 1) ACPICA kernel-resident subsystem:
4090 Fixed a problem with store operations to reference objects. This change
4091 fixes a problem where a Store operation to an ArgX object that contained
4093 reference to a field object did not complete the automatic dereference
4095 then write to the actual field object. Instead, the object type of the
4096 field object was inadvertently changed to match the type of the source
4097 operand. The new behavior will actually write to the field object (buffer
4098 field or field unit), thus matching the correct ACPI-defined behavior.
4100 Implemented support to allow the host to redefine individual OSL
4101 prototypes. This change enables the host to redefine OSL prototypes found
4102 in the acpiosxf.h file. This allows the host to implement OSL interfaces
4103 with a macro or inlined function. Further, it allows the host to add any
4104 additional required modifiers such as __iomem, __init, __exit, etc., as
4105 necessary on a per-interface basis. Enables maximum flexibility for the
4106 OSL interfaces. Lv Zheng.
4108 Hardcoded the access width for the FADT-defined reset register. The ACPI
4109 specification requires the reset register width to be 8 bits. ACPICA now
4110 hardcodes the width to 8 and ignores the FADT width value. This provides
4111 compatibility with other ACPI implementations that have allowed BIOS code
4112 with bad register width values to go unnoticed. Matthew Garett, Bob
4116 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
4118 in the OSL header (acpiosxf). The change modifies the position of this
4119 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
4120 build issues if the OSL defines the implementation of the interface to be
4121 an inline stub function. Lv Zheng.
4123 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
4124 initialization interfaces. This change adds a new macro for the main init
4125 and terminate external interfaces in order to support hosts that require
4126 additional or different processing for these functions. Changed from
4127 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
4130 Cleaned up the memory allocation macros for configurability. In the
4132 case, the ACPI_ALLOCATE and related macros now resolve directly to their
4133 respective AcpiOs* OSL interfaces. Two options:
4134 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
4135 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
4136 2) For AcpiExec (and for debugging), the macros can optionally be
4138 to the local ACPICA interfaces that track each allocation (local tracking
4139 is used to immediately detect memory leaks).
4142 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
4143 to predefine this macro to either TRUE or FALSE during the system build.
4145 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
4147 Example Code and Data Size: These are the sizes for the OS-independent
4148 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4149 debug version of the code includes the debug output trace mechanism and
4150 has a much larger code and data size.
4153 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4154 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4156 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4157 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4160 2) iASL Compiler/Disassembler and Tools:
4162 iASL: Implemented wildcard support for the -e option. This simplifies use
4163 when there are many SSDTs that must be included to resolve external
4165 declarations. ACPICA BZ 1041. Example:
4166 iasl -e ssdt*.dat -d dsdt.dat
4168 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
4169 adds a portable module that implements full history and limited line
4170 editing for Unix and Linux systems. It does not use readline() due to
4171 portability issues. Instead it uses the POSIX termio interface to put the
4172 terminal in raw input mode so that the various special keys can be
4174 (such as up/down-arrow for history support and left/right-arrow for line
4175 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
4177 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
4178 one or more spaces. This provides compatible with early or different
4179 versions of the AcpiDump utility. ACPICA BZ 1044.
4181 AcpiDump: Do not ignore tables that contain only an ACPI table header.
4182 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
4183 no other data. This change adds support to dump these tables. Any tables
4184 shorter than the length of an ACPI table header remain in error (an error
4185 message is emitted). Reported by Yi Li.
4187 Debugger: Echo actual command along with the "unknown command" message.
4189 ----------------------------------------
4190 23 August 2013. Summary of changes for version 20130823:
4192 1) ACPICA kernel-resident subsystem:
4194 Implemented support for host-installed System Control Interrupt (SCI)
4195 handlers. Certain ACPI functionality requires the host to handle raw
4196 SCIs. For example, the "SCI Doorbell" that is defined for memory power
4197 state support requires the host device driver to handle SCIs to examine
4198 if the doorbell has been activated. Multiple SCI handlers can be
4199 installed to allow for future expansion. New external interfaces are
4200 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
4201 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
4203 Operation region support: Never locally free the handler "context"
4204 pointer. This change removes some dangerous code that attempts to free
4205 the handler context pointer in some (rare) circumstances. The owner of
4206 the handler owns this pointer and the ACPICA code should never touch it.
4207 Although not seen to be an issue in any kernel, it did show up as a
4208 problem (fault) under AcpiExec. Also, set the internal storage field for
4209 the context pointer to zero when the region is deactivated, simply for
4210 sanity. David Box. ACPICA BZ 1039.
4212 AcpiRead: On error, do not modify the return value target location. If an
4213 error happens in the middle of a split 32/32 64-bit I/O operation, do not
4214 modify the target of the return value pointer. Makes the code consistent
4215 with the rest of ACPICA. Bjorn Helgaas.
4217 Example Code and Data Size: These are the sizes for the OS-independent
4218 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4219 debug version of the code includes the debug output trace mechanism and
4220 has a much larger code and data size.
4223 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4224 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4226 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4227 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
4230 2) iASL Compiler/Disassembler and Tools:
4232 AcpiDump: Implemented several new features and fixed some problems:
4233 1) Added support to dump the RSDP, RSDT, and XSDT tables.
4234 2) Added support for multiple table instances (SSDT, UEFI).
4235 3) Added option to dump "customized" (overridden) tables (-c).
4236 4) Fixed a problem where some table filenames were improperly
4238 5) Improved some error messages, removed some unnecessary messages.
4240 iASL: Implemented additional support for disassembly of ACPI tables that
4241 contain invocations of external control methods. The -fe<file> option
4242 allows the import of a file that specifies the external methods along
4243 with the required number of arguments for each -- allowing for the
4244 correct disassembly of the table. This is a workaround for a limitation
4245 of AML code where the disassembler often cannot determine the number of
4246 arguments required for an external control method and generates incorrect
4247 ASL code. See the iASL reference for details. ACPICA BZ 1030.
4249 Debugger: Implemented a new command (paths) that displays the full
4250 pathnames (namepaths) and object types of all objects in the namespace.
4251 This is an alternative to the namespace command.
4253 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
4254 mechanism and any installed handlers.
4256 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
4257 This can occur if there are too many parent prefixes in a namepath (for
4258 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
4260 Application OSLs: Set the return value for the PCI read functions. These
4261 functions simply return AE_OK, but should set the return value to zero
4262 also. This change implements this. ACPICA BZ 1038.
4264 Debugger: Prevent possible command line buffer overflow. Increase the
4265 size of a couple of the debugger line buffers, and ensure that overflow
4266 cannot happen. ACPICA BZ 1037.
4268 iASL: Changed to abort immediately on serious errors during the parsing
4269 phase. Due to the nature of ASL, there is no point in attempting to
4270 compile these types of errors, and they typically end up causing a
4271 cascade of hundreds of errors which obscure the original problem.
4273 ----------------------------------------
4274 25 July 2013. Summary of changes for version 20130725:
4276 1) ACPICA kernel-resident subsystem:
4278 Fixed a problem with the DerefOf operator where references to FieldUnits
4279 and BufferFields incorrectly returned the parent object, not the actual
4280 value of the object. After this change, a dereference of a FieldUnit
4281 reference results in a read operation on the field to get the value, and
4282 likewise, the appropriate BufferField value is extracted from the target
4285 Fixed a problem where the _WAK method could cause a fault under these
4286 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
4287 method returned no value. The problem is rarely seen because most kernels
4288 run ACPICA in slack mode.
4290 For the DerefOf operator, a fatal error now results if an attempt is made
4291 to dereference a reference (created by the Index operator) to a NULL
4292 package element. Provides compatibility with other ACPI implementations,
4293 and this behavior will be added to a future version of the ACPI
4296 The ACPI Power Management Timer (defined in the FADT) is now optional.
4297 This provides compatibility with other ACPI implementations and will
4298 appear in the next version of the ACPI specification. If there is no PM
4299 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
4300 zero in the FADT indicates no PM timer.
4302 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
4303 allows the host to globally enable/disable all vendor strings, all
4304 feature strings, or both. Intended to be primarily used for debugging
4305 purposes only. Lv Zheng.
4307 Expose the collected _OSI data to the host via a global variable. This
4308 data tracks the highest level vendor ID that has been invoked by the BIOS
4309 so that the host (and potentially ACPICA itself) can change behaviors
4310 based upon the age of the BIOS.
4312 Example Code and Data Size: These are the sizes for the OS-independent
4313 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4314 debug version of the code includes the debug output trace mechanism and
4315 has a much larger code and data size.
4318 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4319 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4321 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4322 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4325 2) iASL Compiler/Disassembler and Tools:
4327 iASL: Created the following enhancements for the -so option (create
4329 1)Add offsets for the last nameseg in each namepath for every supported
4331 2)Add support for Processor, Device, Thermal Zone, and Scope objects
4332 3)Add the actual AML opcode for the parent object of every supported
4334 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
4336 Disassembler: Emit all unresolved external symbols in a single block.
4337 These are external references to control methods that could not be
4338 resolved, and thus, the disassembler had to make a guess at the number of
4341 iASL: The argument to the -T option (create table template) is now
4342 optional. If not specified, the default table is a DSDT, typically the
4345 ----------------------------------------
4346 26 June 2013. Summary of changes for version 20130626:
4348 1) ACPICA kernel-resident subsystem:
4350 Fixed an issue with runtime repair of the _CST object. Null or invalid
4351 elements were not always removed properly. Lv Zheng.
4353 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
4354 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
4355 the maximum number of GPEs is 1016. Use of multiple GPE block devices
4356 makes the system-wide number of GPEs essentially unlimited.
4358 Example Code and Data Size: These are the sizes for the OS-independent
4359 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4360 debug version of the code includes the debug output trace mechanism and
4361 has a much larger code and data size.
4364 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4365 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4367 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4368 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4371 2) iASL Compiler/Disassembler and Tools:
4373 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
4374 hosts. Now supports Linux, FreeBSD, and Windows.
4376 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
4377 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
4379 iASL/Preprocessor: Implemented full support for nested
4380 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
4382 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
4383 max. The original purpose of this constraint was to limit the amount of
4384 debug output. However, the string function in question (UtPrintString) is
4385 now used for the disassembler also, where 256 bytes is insufficient.
4386 Reported by RehabMan@GitHub.
4388 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
4389 tables. ACPICA BZ 999. Lv Zheng.
4391 iASL: Fixed a couple of error exit issues that could result in a "Could
4392 not delete <file>" message during ASL compilation.
4394 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
4395 the actual signatures for these tables are "FACP" and "APIC",
4398 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
4399 tables are allowed to have multiple instances.
4401 ----------------------------------------
4402 17 May 2013. Summary of changes for version 20130517:
4404 1) ACPICA kernel-resident subsystem:
4406 Fixed a regression introduced in version 20130328 for _INI methods. This
4407 change fixes a problem introduced in 20130328 where _INI methods are no
4408 longer executed properly because of a memory block that was not
4409 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
4410 <tomasz.nowicki@linaro.org>.
4412 Fixed a possible problem with the new extended sleep registers in the
4414 5.0 FADT. Do not use these registers (even if populated) unless the HW-
4415 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
4418 Implemented return value repair code for _CST predefined objects: Sort
4420 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
4422 Implemented a debug-only option to disable loading of SSDTs from the
4423 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
4424 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
4425 acglobal.h - ACPICA BZ 1005. Lv Zheng.
4427 Fixed some issues in the ACPICA initialization and termination code:
4428 Tomasz Nowicki <tomasz.nowicki@linaro.org>
4429 1) Clear events initialized flag upon event component termination. ACPICA
4431 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
4432 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
4433 4) Clear debug buffer global on termination to prevent possible multiple
4434 delete. ACPICA BZ 1010.
4436 Standardized all switch() blocks across the entire source base. After
4438 years, different formatting for switch() had crept in. This change makes
4439 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
4441 Split some files to enhance ACPICA modularity and configurability:
4442 1) Split buffer dump routines into utilities/utbuffer.c
4443 2) Split internal error message routines into utilities/uterror.c
4444 3) Split table print utilities into tables/tbprint.c
4445 4) Split iASL command-line option processing into asloptions.c
4447 Makefile enhancements:
4448 1) Support for all new files above.
4449 2) Abort make on errors from any subcomponent. Chao Guan.
4450 3) Add build support for Apple Mac OS X. Liang Qi.
4452 Example Code and Data Size: These are the sizes for the OS-independent
4453 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4454 debug version of the code includes the debug output trace mechanism and
4455 has a much larger code and data size.
4458 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4459 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4461 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4462 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4465 2) iASL Compiler/Disassembler and Tools:
4467 New utility: Implemented an easily portable version of the acpidump
4468 utility to extract ACPI tables from the system (or a file) in an ASCII
4470 dump format. The top-level code implements the various command line
4471 options, file I/O, and table dump routines. To port to a new host, only
4472 three functions need to be implemented to get tables -- since this
4473 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
4474 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
4475 1) The Windows version obtains the ACPI tables from the Registry.
4476 2) The Linux version is under development.
4477 3) Other hosts - If an OS-dependent module is submitted, it will be
4478 distributed with ACPICA.
4480 iASL: Fixed a regression for -D preprocessor option (define symbol). A
4481 restructuring/change to the initialization sequence caused this option to
4482 no longer work properly.
4484 iASL: Implemented a mechanism to disable specific warnings and remarks.
4485 Adds a new command line option, "-vw <messageid> as well as "#pragma
4486 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
4488 iASL: Fix for too-strict package object validation. The package object
4489 validation for return values from the predefined names is a bit too
4490 strict, it does not allow names references within the package (which will
4491 be resolved at runtime.) These types of references cannot be validated at
4492 compile time. This change ignores named references within package objects
4493 for names that return or define static packages.
4495 Debugger: Fixed the 80-character command line limitation for the History
4496 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
4498 iASL: Added control method and package support for the -so option
4499 (generates AML offset table for BIOS support.)
4501 iASL: issue a remark if a non-serialized method creates named objects. If
4502 a thread blocks within the method for any reason, and another thread
4503 enters the method, the method will fail because an attempt will be made
4505 create the same (named) object twice. In this case, issue a remark that
4506 the method should be marked serialized. NOTE: may become a warning later.
4509 ----------------------------------------
4510 18 April 2013. Summary of changes for version 20130418:
4512 1) ACPICA kernel-resident subsystem:
4514 Fixed a possible buffer overrun during some rare but specific field unit
4515 read operations. This overrun can only happen if the DSDT version is 1 --
4516 meaning that all AML integers are 32 bits -- and the field length is
4517 between 33 and 55 bits long. During the read, an internal buffer object
4519 created for the field unit because the field is larger than an integer
4521 bits). However, in this case, the buffer will be incorrectly written
4522 beyond the end because the buffer length is less than the internal
4524 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
4525 long, but a full 8 bytes will be written.
4527 Updated the Embedded Controller "orphan" _REG method support. This refers
4528 to _REG methods under the EC device that have no corresponding operation
4529 region. This is allowed by the ACPI specification. This update removes a
4530 dependency on the existence an ECDT table. It will execute an orphan _REG
4531 method as long as the operation region handler for the EC is installed at
4532 the EC device node and not the namespace root. Rui Zhang (original
4533 update), Bob Moore (update/integrate).
4535 Implemented run-time argument typechecking for all predefined ACPI names
4536 (_STA, _BIF, etc.) This change performs object typechecking on all
4537 incoming arguments for all predefined names executed via
4538 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
4539 passing correct object types as well as the correct number of arguments
4540 (therefore identifying any issues immediately). Also, the ASL/namespace
4541 definition of the predefined name is checked against the ACPI
4542 specification for the proper argument count. Adds one new file,
4545 Changed an exception code for the ASL UnLoad() operator. Changed the
4546 exception code for the case where the input DdbHandle is invalid, from
4547 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
4549 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
4550 global makefile. The use of this flag causes compiler errors on earlier
4551 versions of GCC, so it has been removed for compatibility.
4553 Miscellaneous cleanup:
4554 1) Removed some unused/obsolete macros
4555 2) Fixed a possible memory leak in the _OSI support
4556 3) Removed an unused variable in the predefined name support
4557 4) Windows OSL: remove obsolete reference to a memory list field
4559 Example Code and Data Size: These are the sizes for the OS-independent
4560 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4561 debug version of the code includes the debug output trace mechanism and
4562 has a much larger code and data size.
4565 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4566 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4568 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4569 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4572 2) iASL Compiler/Disassembler and Tools:
4574 AcpiExec: Added installation of a handler for the SystemCMOS address
4575 space. This prevents control method abort if a method accesses this
4578 AcpiExec: Added support for multiple EC devices, and now install EC
4579 operation region handler(s) at the actual EC device instead of the
4580 namespace root. This reflects the typical behavior of host operating
4583 AcpiExec: Updated to ensure that all operation region handlers are
4584 installed before the _REG methods are executed. This prevents a _REG
4585 method from aborting if it accesses an address space has no handler.
4586 AcpiExec installs a handler for every possible address space.
4588 Debugger: Enhanced the "handlers" command to display non-root handlers.
4589 This change enhances the handlers command to display handlers associated
4590 with individual devices throughout the namespace, in addition to the
4591 currently supported display of handlers associated with the root
4595 ASL Test Suite: Several test suite errors have been identified and
4596 resolved, reducing the total error count during execution. Chao Guan.
4598 ----------------------------------------
4599 28 March 2013. Summary of changes for version 20130328:
4601 1) ACPICA kernel-resident subsystem:
4603 Fixed several possible race conditions with the internal object reference
4604 counting mechanism. Some of the external ACPICA interfaces update object
4605 reference counts without holding the interpreter or namespace lock. This
4606 change adds a spinlock to protect reference count updates on the internal
4607 ACPICA objects. Reported by and with assistance from Andriy Gapon
4610 FADT support: Removed an extraneous warning for very large GPE register
4611 sets. This change removes a size mismatch warning if the legacy length
4612 field for a GPE register set is larger than the 64-bit GAS structure can
4613 accommodate. GPE register sets can be larger than the 255-bit width
4614 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
4616 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
4617 return from this interface. Handles a possible timeout case if
4618 ACPI_WAIT_FOREVER is modified by the host to be a value less than
4619 "forever". Jung-uk Kim.
4621 Predefined name support: Add allowed/required argument type information
4623 the master predefined info table. This change adds the infrastructure to
4624 enable typechecking on incoming arguments for all predefined
4625 methods/objects. It does not actually contain the code that will fully
4626 utilize this information, this is still under development. Also condenses
4627 some duplicate code for the predefined names into a new module,
4628 utilities/utpredef.c
4630 Example Code and Data Size: These are the sizes for the OS-independent
4631 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4632 debug version of the code includes the debug output trace mechanism and
4633 has a much larger code and data size.
4636 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4637 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4639 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4640 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4643 2) iASL Compiler/Disassembler and Tools:
4645 iASL: Implemented a new option to simplify the development of ACPI-
4647 BIOS code. Adds support for a new "offset table" output file. The -so
4648 option will create a C table containing the AML table offsets of various
4649 named objects in the namespace so that BIOS code can modify them easily
4651 boot time. This can simplify BIOS runtime code by eliminating expensive
4652 searches for "magic values", enhancing boot times and adding greater
4653 reliability. With assistance from Lee Hamel.
4655 iASL: Allow additional predefined names to return zero-length packages.
4656 Now, all predefined names that are defined by the ACPI specification to
4657 return a "variable-length package of packages" are allowed to return a
4658 zero length top-level package. This allows the BIOS to tell the host that
4659 the requested feature is not supported, and supports existing BIOS/ASL
4662 iASL: Changed the "result not used" warning to an error. This is the case
4663 where an ASL operator is effectively a NOOP because the result of the
4664 operation is not stored anywhere. For example:
4666 There is no target (missing 3rd argument), nor is the function return
4667 value used. This is potentially a very serious problem -- since the code
4668 was probably intended to do something, but for whatever reason, the value
4669 was not stored. Therefore, this issue has been upgraded from a warning to
4672 AcpiHelp: Added allowable/required argument types to the predefined names
4673 info display. This feature utilizes the recent update to the predefined
4674 names table (above).
4676 ----------------------------------------
4677 14 February 2013. Summary of changes for version 20130214:
4679 1) ACPICA Kernel-resident Subsystem:
4681 Fixed a possible regression on some hosts: Reinstated the safe return
4682 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
4683 evaluated only once. Although these macros are not needed for the ACPICA
4684 code itself, they are often used by ACPI-related host device drivers
4686 the safe feature may be necessary.
4688 Fixed several issues related to the ACPI 5.0 reduced hardware support
4689 (SOC): Now ensure that if the platform declares itself as hardware-
4691 via the FADT, the following functions become NOOPs (and always return
4692 AE_OK) because ACPI is always enabled by definition on these machines:
4698 Dynamic Object Repair: Implemented additional runtime repairs for
4699 predefined name return values. Both of these repairs can simplify code in
4700 the related device drivers that invoke these methods:
4701 1) For the _STR and _MLS names, automatically repair/convert an ASCII
4702 string to a Unicode buffer.
4703 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
4705 lone end tag descriptor in the following cases: A Return(0) was executed,
4706 a null buffer was returned, or no object at all was returned (non-slack
4707 mode only). Adds a new file, nsconvert.c
4708 ACPICA BZ 998. Bob Moore, Lv Zheng.
4710 Resource Manager: Added additional code to prevent possible infinite
4712 while traversing corrupted or ill-formed resource template buffers. Check
4713 for zero-length resource descriptors in all code that loops through
4714 resource templates (the length field is used to index through the
4715 template). This change also hardens the external AcpiWalkResources and
4716 AcpiWalkResourceBuffer interfaces.
4718 Local Cache Manager: Enhanced the main data structure to eliminate an
4719 unnecessary mechanism to access the next object in the list. Actually
4720 provides a small performance enhancement for hosts that use the local
4721 ACPICA cache manager. Jung-uk Kim.
4723 Example Code and Data Size: These are the sizes for the OS-independent
4724 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4725 debug version of the code includes the debug output trace mechanism and
4726 has a much larger code and data size.
4729 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4730 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4732 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4733 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4736 2) iASL Compiler/Disassembler and Tools:
4738 iASL/Disassembler: Fixed several issues with the definition of the ACPI
4739 5.0 RASF table (RAS Feature Table). This change incorporates late changes
4740 that were made to the ACPI 5.0 specification.
4742 iASL/Disassembler: Added full support for the following new ACPI tables:
4743 1) The MTMR table (MID Timer Table)
4744 2) The VRTC table (Virtual Real Time Clock Table).
4745 Includes header file, disassembler, table compiler, and template support
4748 iASL: Implemented compile-time validation of package objects returned by
4749 predefined names. This new feature validates static package objects
4750 returned by the various predefined names defined to return packages. Both
4751 object types and package lengths are validated, for both parent packages
4752 and sub-packages, if any. The code is similar in structure and behavior
4754 the runtime repair mechanism within the AML interpreter and uses the
4755 existing predefined name information table. Adds a new file, aslprepkg.c.
4758 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
4759 This feature detects a binary file with a valid ACPI table header and
4760 invokes the disassembler automatically. Eliminates the need to
4761 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
4763 iASL/Disassembler: Added several warnings for the case where there are
4764 unresolved control methods during the disassembly. This can potentially
4765 cause errors when the output file is compiled, because the disassembler
4766 assumes zero method arguments in these cases (it cannot determine the
4767 actual number of arguments without resolution/definition of the method).
4769 Debugger: Added support to display all resources with a single command.
4770 Invocation of the resources command with no arguments will now display
4772 resources within the current namespace.
4774 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
4777 ----------------------------------------
4778 17 January 2013. Summary of changes for version 20130117:
4780 1) ACPICA Kernel-resident Subsystem:
4782 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
4783 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
4784 objects to return a package containing one integer, most BIOS code
4786 two integers and the previous code reflects that. However, we also need
4788 support BIOS code that actually implements to the ACPI spec, and this
4789 change reflects this.
4791 Fixed two issues with the ACPI_DEBUG_PRINT macros:
4792 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
4793 C compilers that require this support.
4794 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
4795 ACPI_DEBUG is already used by many of the various hosts.
4797 Updated all ACPICA copyrights and signons to 2013. Added the 2013
4798 copyright to all module headers and signons, including the standard Linux
4799 header. This affects virtually every file in the ACPICA core subsystem,
4800 iASL compiler, all ACPICA utilities, and the test suites.
4802 Example Code and Data Size: These are the sizes for the OS-independent
4803 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4804 debug version of the code includes the debug output trace mechanism and
4805 has a much larger code and data size.
4808 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4809 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4811 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4812 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4815 2) iASL Compiler/Disassembler and Tools:
4817 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
4818 prevent a possible fault on some hosts. Some C libraries modify the arg
4819 pointer parameter to vfprintf making it difficult to call it twice in the
4820 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
4821 does not affect the Windows OSL since the Win C library does not modify
4822 the arg pointer. Chao Guan, Bob Moore.
4824 iASL: Fixed a possible infinite loop when the maximum error count is
4825 reached. If an output file other than the .AML file is specified (such as
4826 a listing file), and the maximum number of errors is reached, do not
4827 attempt to flush data to the output file(s) as the compiler is aborting.
4828 This can cause an infinite loop as the max error count code essentially
4829 keeps calling itself.
4831 iASL/Disassembler: Added an option (-in) to ignore NOOP
4833 Implemented for both the compiler and the disassembler. Often, the NOOP
4834 opcode is used as padding for packages that are changed dynamically by
4836 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
4837 errors. This option causes the disassembler to ignore all NOOP opcodes
4838 (0xA3), and it also causes the compiler to ignore all ASL source code
4842 Debugger: Enhanced the Sleep command to execute all sleep states. This
4843 change allows Sleep to be invoked with no arguments and causes the
4844 debugger to execute all of the sleep states, 0-5, automatically.
4846 ----------------------------------------
4847 20 December 2012. Summary of changes for version 20121220:
4849 1) ACPICA Kernel-resident Subsystem:
4851 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
4852 alternate entry point for AcpiWalkResources and improves the usability of
4853 the resource manager by accepting as input a buffer containing the output
4854 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
4855 input buffer is not deleted by this interface so that it can be used by
4856 the host later. See the ACPICA reference for details.
4858 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
4859 (DSDT version < 2). The constant will be truncated and this warning
4860 reflects that behavior.
4862 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
4863 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
4864 both get and set the new wake bit in these descriptors, separately from
4865 the existing share bit. Reported by Aaron Lu.
4867 Interpreter: Fix Store() when an implicit conversion is not possible. For
4868 example, in the cases such as a store of a string to an existing package
4869 object, implement the store as a CopyObject(). This is a small departure
4870 from the ACPI specification which states that the control method should
4872 aborted in this case. However, the ASLTS suite depends on this behavior.
4874 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
4875 macros: check if debug output is currently enabled as soon as possible to
4876 minimize performance impact if debug is in fact not enabled.
4878 Source code restructuring: Cleanup to improve modularity. The following
4879 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
4880 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
4881 Associated makefiles and project files have been updated.
4883 Changed an exception code for LoadTable operator. For the case where one
4884 of the input strings is too long, change the returned exception code from
4885 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
4887 Fixed a possible memory leak in dispatcher error path. On error, delete
4888 the mutex object created during method mutex creation. Reported by
4889 tim.gardner@canonical.com.
4891 Example Code and Data Size: These are the sizes for the OS-independent
4892 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4893 debug version of the code includes the debug output trace mechanism and
4894 has a much larger code and data size.
4897 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4898 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4900 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4901 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4904 2) iASL Compiler/Disassembler and Tools:
4906 iASL: Disallow a method call as argument to the ObjectType ASL operator.
4907 This change tracks an errata to the ACPI 5.0 document. The AML grammar
4908 will not allow the interpreter to differentiate between a method and a
4909 method invocation when these are used as an argument to the ObjectType
4910 operator. The ACPI specification change is to disallow a method
4912 (UserTerm) for the ObjectType operator.
4914 Finish support for the TPM2 and CSRT tables in the headers, table
4915 compiler, and disassembler.
4917 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
4918 always expires immediately if the semaphore is not available. The
4920 code was using a relative-time timeout, but sem_timedwait requires the
4922 of an absolute time.
4924 iASL: Added a remark if the Timer() operator is used within a 32-bit
4925 table. This operator returns a 64-bit time value that will be truncated
4926 within a 32-bit table.
4928 iASL Source code restructuring: Cleanup to improve modularity. The
4929 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
4930 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
4934 ----------------------------------------
4935 14 November 2012. Summary of changes for version 20121114:
4937 1) ACPICA Kernel-resident Subsystem:
4939 Implemented a performance enhancement for ACPI/AML Package objects. This
4940 change greatly increases the performance of Package objects within the
4941 interpreter. It changes the processing of reference counts for packages
4943 optimizing for the most common case where the package sub-objects are
4944 either Integers, Strings, or Buffers. Increases the overall performance
4946 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
4948 Chao Guan. ACPICA BZ 943.
4950 Implemented and deployed common macros to extract flag bits from resource
4951 descriptors. Improves readability and maintainability of the code. Fixes
4953 problem with the UART serial bus descriptor for the number of data bits
4954 flags (was incorrectly 2 bits, should be 3).
4956 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
4957 of the macros and changed the SETx macros to the style of (destination,
4958 source). Also added ACPI_CASTx companion macros. Lv Zheng.
4960 Example Code and Data Size: These are the sizes for the OS-independent
4961 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4962 debug version of the code includes the debug output trace mechanism and
4963 has a much larger code and data size.
4966 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4967 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4969 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4970 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4973 2) iASL Compiler/Disassembler and Tools:
4975 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
4976 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
4977 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
4979 Disassembler: Fixed a problem with external declaration generation. Fixes
4980 a problem where an incorrect pathname could be generated for an external
4981 declaration if the original reference to the object includes leading
4982 carats (^). ACPICA BZ 984.
4984 Debugger: Completed a major update for the Disassemble<method> command.
4985 This command was out-of-date and did not properly disassemble control
4986 methods that had any reasonable complexity. This fix brings the command
4988 to the same level as the rest of the disassembler. Adds one new file,
4989 dmdeferred.c, which is existing code that is now common with the main
4990 disassembler and the debugger disassemble command. ACPICA MZ 978.
4992 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
4993 Newer versions of Bison emit this prototype, so moved the prototype out
4995 the iASL header to where it is actually used in order to avoid a
4999 iASL/Tools: Standardized use of the stream I/O functions:
5000 1) Ensure check for I/O error after every fopen/fread/fwrite
5001 2) Ensure proper order of size/count arguments for fread/fwrite
5002 3) Use test of (Actual != Requested) after all fwrite, and most fread
5003 4) Standardize I/O error messages
5004 Improves reliability and maintainability of the code. Bob Moore, Lv
5008 Disassembler: Prevent duplicate External() statements. During generation
5009 of external statements, detect similar pathnames that are actually
5010 duplicates such as these:
5013 Remove all leading '\' characters from pathnames during the external
5014 statement generation so that duplicates will be detected and tossed.
5017 Tools: Replace low-level I/O with stream I/O functions. Replace
5018 open/read/write/close with the stream I/O equivalents
5019 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
5022 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
5023 name header so that AcpiXtract recognizes the output file/table.
5025 iASL: Remove obsolete -2 option flag. Originally intended to force the
5026 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
5027 and the entire concept is now obsolete.
5029 ----------------------------------------
5030 18 October 2012. Summary of changes for version 20121018:
5033 1) ACPICA Kernel-resident Subsystem:
5035 Updated support for the ACPI 5.0 MPST table. Fixes some problems
5036 introduced by late changes to the table as it was added to the ACPI 5.0
5037 specification. Includes header, disassembler, and data table compiler
5038 support as well as a new version of the MPST template.
5040 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
5041 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
5042 methods: _HID, _CID, and _UID.
5044 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
5045 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
5046 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
5047 names for their various drivers. Affects the AcpiGetObjectInfo external
5048 interface, and other internal interfaces as well.
5050 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
5051 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
5052 on machines that support non-aligned transfers. Optimizes for this case
5053 rather than using a strncpy. With assistance from Zheng Lv.
5055 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
5056 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
5058 Added a new debug print message for AML mutex objects that are force-
5059 released. At control method termination, any currently acquired mutex
5060 objects are force-released. Adds a new debug-only message for each one
5063 Audited/updated all ACPICA return macros and the function debug depth
5064 counter: 1) Ensure that all functions that use the various TRACE macros
5065 also use the appropriate ACPICA return macros. 2) Ensure that all normal
5066 return statements surround the return expression (value) with parens to
5067 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
5068 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
5070 Global source code changes/maintenance: All extra lines at the start and
5071 end of each source file have been removed for consistency. Also, within
5072 comments, all new sentences start with a single space instead of a double
5073 space, again for consistency across the code base.
5075 Example Code and Data Size: These are the sizes for the OS-independent
5076 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5077 debug version of the code includes the debug output trace mechanism and
5078 has a much larger code and data size.
5081 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5082 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5084 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
5085 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5088 2) iASL Compiler/Disassembler and Tools:
5090 AcpiExec: Improved the algorithm used for memory leak/corruption
5091 detection. Added some intelligence to the code that maintains the global
5092 list of allocated memory. The list is now ordered by allocated memory
5093 address, significantly improving performance. When running AcpiExec on
5094 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
5095 on the platform and/or the environment. Note, this performance
5096 enhancement affects the AcpiExec utility only, not the kernel-resident
5099 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
5100 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
5101 incorrect table offset reported for invalid opcodes. Report the original
5102 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
5104 Disassembler: Enhanced the -vt option to emit the binary table data in
5105 hex format to assist with debugging.
5107 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
5108 size of file structure. Colin Ian King.
5110 ----------------------------------------
5111 13 September 2012. Summary of changes for version 20120913:
5114 1) ACPICA Kernel-resident Subsystem:
5116 ACPI 5.0: Added two new notify types for the Hardware Error Notification
5117 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
5121 Table Manager: Merged/removed duplicate code in the root table resize
5122 functions. One function is external, the other is internal. Lv Zheng,
5126 Makefiles: Completely removed the obsolete "Linux" makefiles under
5127 acpica/generate/linux. These makefiles are obsolete and have been
5130 the generic unix makefiles under acpica/generate/unix.
5132 Makefiles: Ensure that binary files always copied properly. Minor rule
5134 to ensure that the final binary output files are always copied up to the
5135 appropriate binary directory (bin32 or bin64.)
5137 Example Code and Data Size: These are the sizes for the OS-independent
5138 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5140 version of the code includes the debug output trace mechanism and has a
5142 larger code and data size.
5145 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5146 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5148 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5149 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5152 2) iASL Compiler/Disassembler and Tools:
5154 Disassembler: Fixed a possible fault during the disassembly of resource
5155 descriptors when a second parse is required because of the invocation of
5156 external control methods within the table. With assistance from
5157 adq@lidskialf.net. ACPICA BZ 976.
5159 iASL: Fixed a namepath optimization problem. An error can occur if the
5161 node that contains the namepath to be optimized does not have a parent
5163 that is a named object. This change fixes the problem.
5165 iASL: Fixed a regression where the AML file is not deleted on errors. The
5167 output file should be deleted if there are any errors during the
5170 only exception is if the -f (force output) option is used. ACPICA BZ 974.
5172 iASL: Added a feature to automatically increase internal line buffer
5174 Via realloc(), automatically increase the internal line buffer sizes as
5175 necessary to support very long source code lines. The current version of
5177 preprocessor requires a buffer long enough to contain full source code
5179 This change increases the line buffer(s) if the input lines go beyond the
5180 current buffer size. This eliminates errors that occurred when a source
5182 line was longer than the buffer.
5184 iASL: Fixed a problem with constant folding in method declarations. The
5185 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
5187 Type3 opcode was used.
5189 Debugger: Improved command help support. For incorrect argument count,
5191 full help for the command. For help command itself, allow an argument to
5194 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
5195 errors during execution of the suite. Guan Chao.
5197 ----------------------------------------
5198 16 August 2012. Summary of changes for version 20120816:
5201 1) ACPICA Kernel-resident Subsystem:
5203 Removed all use of the deprecated _GTS and _BFS predefined methods. The
5205 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
5206 deprecated and will probably be removed from the ACPI specification.
5208 does not invoke them, and reportedly never will. The final nail in the
5210 is that the ACPI specification states that these methods must be run with
5211 interrupts off, which is not going to happen in a kernel interpreter.
5213 Linux has removed all use of the methods also. It was discovered that
5214 invoking these functions caused failures on some machines, probably
5216 they were never tested since Windows does not call them. Affects two
5218 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
5221 Implemented support for complex bit-packed buffers returned from the _PLD
5222 (Physical Location of Device) predefined method. Adds a new external
5223 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
5225 structure. Note: C Bitfields cannot be used for this type of predefined
5226 structure since the memory layout of individual bitfields is not defined
5228 the C language. In addition, there are endian concerns where a compiler
5230 change the bitfield ordering based on the machine type. The new ACPICA
5231 interface eliminates these issues, and should be called after _PLD is
5232 executed. ACPICA BZ 954.
5234 Implemented a change to allow a scope change to root (via "Scope (\)")
5236 execution of module-level ASL code (code that is executed at table load
5239 Added the Windows8/Server2012 string for the _OSI method. This change
5242 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
5245 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
5247 and CSRT (Core System Resource Table).
5249 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
5250 names. This simplifies access to the buffers returned by these predefined
5251 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
5253 GPE support: Removed an extraneous parameter from the various low-level
5254 internal GPE functions. Tang Feng.
5256 Removed the linux makefiles from the unix packages. The generate/linux
5257 makefiles are obsolete and have been removed from the unix tarball
5259 packages. The replacement makefiles are under generate/unix, and there is
5261 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
5263 Updates for Unix makefiles:
5264 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
5265 2) Update linker flags (move to end of command line) for AcpiExec
5269 Split ACPICA initialization functions to new file, utxfinit.c. Split from
5270 utxface.c to improve modularity and reduce file size.
5272 Example Code and Data Size: These are the sizes for the OS-independent
5273 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5274 debug version of the code includes the debug output trace mechanism and
5276 much larger code and data size.
5279 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5280 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5282 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5283 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5286 2) iASL Compiler/Disassembler and Tools:
5288 iASL: Fixed a problem with constant folding for fixed-length constant
5289 expressions. The constant-folding code was not being invoked for constant
5290 expressions that allow the use of type 3/4/5 opcodes to generate
5292 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
5294 in the generation of invalid AML bytecode. ACPICA BZ 970.
5296 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
5297 apparently automatically emit some of the necessary externals. This
5299 handles these versions in order to eliminate generation warnings.
5301 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
5303 Disassembler: Add support to decode _PLD buffers. The decoded buffer
5305 within comments in the output file.
5307 Debugger: Fixed a regression with the "Threads" command where
5308 AE_BAD_PARAMETER was always returned.
5310 ----------------------------------------
5311 11 July 2012. Summary of changes for version 20120711:
5313 1) ACPICA Kernel-resident Subsystem:
5315 Fixed a possible fault in the return package object repair code. Fixes a
5316 problem that can occur when a lone package object is wrapped with an
5318 package object in order to force conformance to the ACPI specification.
5320 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
5324 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
5325 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
5326 ARB_DIS bit must be implemented in the host-dependent C3 processor power
5328 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
5330 Intel and other vendors. (for Intel: ICH4-M and earlier)
5332 This change removes the code to disable/enable bus master arbitration
5334 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
5336 resume problems on some machines. The change has been in use for over
5340 Implemented two new external interfaces to support host-directed dynamic
5342 table load and unload. They are intended to simplify the host
5344 of hot-plug support:
5345 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
5346 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
5348 See the ACPICA reference for additional details. Adds one new file,
5349 components/tables/tbxfload.c
5351 Implemented and deployed two new interfaces for errors and warnings that
5353 known to be caused by BIOS/firmware issues:
5354 AcpiBiosError: Prints "ACPI Firmware Error" message.
5355 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
5356 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
5358 and FADT errors. Additional deployment to be completed as appropriate in
5360 future. The associated conditional macros are ACPI_BIOS_ERROR and
5361 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
5366 Implicit notify support: ensure that no memory allocation occurs within a
5367 critical region. This fix moves a memory allocation outside of the time
5369 spinlock is held. Fixes issues on systems that do not allow this
5373 Split exception code utilities and tables into a new file,
5376 Example Code and Data Size: These are the sizes for the OS-independent
5377 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5379 version of the code includes the debug output trace mechanism and has a
5381 larger code and data size.
5384 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5385 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5387 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5388 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5391 2) iASL Compiler/Disassembler and Tools:
5393 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
5397 Debugger: Enhanced the "tables" command to emit additional information
5399 the current set of ACPI tables, including the owner ID and flags decode.
5401 Debugger: Reimplemented the "unload" command to use the new
5402 AcpiUnloadParentTable external interface. This command was disable
5404 due to need for an unload interface.
5406 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
5408 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
5410 ----------------------------------------
5411 20 June 2012. Summary of changes for version 20120620:
5414 1) ACPICA Kernel-resident Subsystem:
5416 Implemented support to expand the "implicit notify" feature to allow
5418 devices to be notified by a single GPE. This feature automatically
5420 runtime device notification in the absence of a BIOS-provided GPE control
5421 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
5423 provided by ACPICA for Windows compatibility, and is a workaround for
5426 code errors. See the description of the AcpiSetupGpeForWake interface in
5428 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
5430 Changed some comments and internal function names to simplify and ensure
5431 correctness of the Linux code translation. No functional changes.
5433 Example Code and Data Size: These are the sizes for the OS-independent
5434 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5436 version of the code includes the debug output trace mechanism and has a
5438 larger code and data size.
5441 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5442 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5444 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5445 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5448 2) iASL Compiler/Disassembler and Tools:
5450 Disassembler: Added support to emit short, commented descriptions for the
5452 predefined names in order to improve the readability of the disassembled
5453 output. ACPICA BZ 959. Changes include:
5454 1) Emit descriptions for all standard predefined names (_INI, _STA,
5457 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
5458 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
5461 AcpiSrc: Fixed several long-standing Linux code translation issues.
5463 descriptions in function headers are now translated properly to lower
5466 underscores. ACPICA BZ 961. Also fixes translation problems such as
5472 local_fADT -> local_FADT
5473 execute_oSI -> execute_OSI
5475 iASL: Fixed a problem where null bytes were inadvertently emitted into
5479 iASL: Added the existing debug options to the standard help screen. There
5481 no longer two different help screens. ACPICA BZ 957.
5483 AcpiHelp: Fixed some typos in the various predefined name descriptions.
5485 expand some of the descriptions where appropriate.
5487 iASL: Fixed the -ot option (display compile times/statistics). Was not
5489 properly for standard output; only worked for the debug file case.
5491 ----------------------------------------
5492 18 May 2012. Summary of changes for version 20120518:
5495 1) ACPICA Core Subsystem:
5497 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
5499 to block until asynchronous events such as notifies and GPEs have
5501 Within ACPICA, it is only called before a notify or GPE handler is
5502 removed/uninstalled. It also may be useful for the host OS within related
5503 drivers such as the Embedded Controller driver. See the ACPICA reference
5505 additional information. ACPICA BZ 868.
5507 ACPI Tables: Added a new error message for a possible overflow failure
5509 the conversion of FADT 32-bit legacy register addresses to internal
5512 bit GAS structure representation. The GAS has a one-byte "bit length"
5514 thus limiting the register length to 255 bits. ACPICA BZ 953.
5516 Example Code and Data Size: These are the sizes for the OS-independent
5517 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5519 version of the code includes the debug output trace mechanism and has a
5521 larger code and data size.
5524 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5525 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5527 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5528 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5531 2) iASL Compiler/Disassembler and Tools:
5533 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
5535 This keyword was added late in the ACPI 5.0 release cycle and was not
5536 implemented until now.
5538 Disassembler: Added support for Operation Region externals. Adds missing
5539 support for operation regions that are defined in another table, and
5540 referenced locally via a Field or BankField ASL operator. Now generates
5542 correct External statement.
5544 Disassembler: Several additional fixes for the External() statement
5546 related to some ASL operators. Also, order the External() statements
5547 alphabetically in the disassembler output. Fixes the External()
5550 the Create* field, Alias, and Scope operators:
5551 1) Create* buffer field operators - fix type mismatch warning on
5553 2) Alias - implement missing External support
5554 3) Scope - fix to make sure all necessary externals are emitted.
5556 iASL: Improved pathname support. For include files, merge the prefix
5558 with the file pathname and eliminate unnecessary components. Convert
5559 backslashes in all pathnames to forward slashes, for readability. Include
5561 pathname changes affect both #include and Include() type operators.
5563 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
5565 of a valid line by inserting a newline and then returning the EOF during
5567 next call to GetNextLine. Prevents the line from being ignored due to EOF
5570 iASL: Implemented some changes to enhance the IDE support (-vi option.)
5572 and Warning messages are now correctly recognized for both the source
5574 browser and the global error and warning counts.
5576 ----------------------------------------
5577 20 April 2012. Summary of changes for version 20120420:
5580 1) ACPICA Core Subsystem:
5582 Implemented support for multiple notify handlers. This change adds
5585 allow multiple system and device notify handlers on Device, Thermal Zone,
5587 Processor objects. This can simplify the host OS notification
5589 Also re-worked and restructured the entire notify support code to
5591 handler installation, handler removal, notify event queuing, and notify
5592 dispatch to handler(s). Note: there can still only be two global notify
5593 handlers - one for system notifies and one for device notifies. There are
5595 changes to the existing handler install/remove interfaces. Lin Ming, Bob
5596 Moore, Rafael Wysocki.
5598 Fixed a regression in the package repair code where the object reference
5599 count was calculated incorrectly. Regression was introduced in the commit
5600 "Support to add Package wrappers".
5602 Fixed a couple possible memory leaks in the AML parser, in the error
5604 path. Jesper Juhl, Lin Ming.
5606 Example Code and Data Size: These are the sizes for the OS-independent
5607 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5608 debug version of the code includes the debug output trace mechanism and
5610 much larger code and data size.
5613 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5614 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5616 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5617 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5620 2) iASL Compiler/Disassembler and Tools:
5622 iASL: Fixed a problem with the resource descriptor support where the
5624 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
5625 included in cumulative descriptor offset, resulting in incorrect values
5627 resource tags within resource descriptors appearing after a
5629 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
5631 iASL and Preprocessor: Implemented full support for the #line directive
5633 correctly track original source file line numbers through the .i
5635 output file - for error and warning messages.
5637 iASL: Expand the allowable byte constants for address space IDs.
5639 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
5640 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
5642 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
5644 iASL: Add option to completely disable the preprocessor (-Pn).
5646 iASL: Now emit all error/warning messages to standard error (stderr) by
5647 default (instead of the previous stdout).
5649 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
5651 for resource descriptor offset fix above. Update/cleanup error output
5652 routines. Enable and send iASL errors/warnings to an error logfile
5653 (error.txt). Send all other iASL output to a logfile (compiler.txt).
5655 several extraneous "unrecognized operator" messages.
5657 ----------------------------------------
5658 20 March 2012. Summary of changes for version 20120320:
5661 1) ACPICA Core Subsystem:
5663 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
5664 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
5666 does not execute these methods, and therefore these methods are often
5667 untested. It has been seen on some systems where the execution of these
5668 methods causes errors and also prevents the machine from entering S5. It
5670 therefore suggested that host operating systems do not execute these
5672 by default. In the future, perhaps these methods can be optionally
5674 based on the age of the system and/or what is the newest version of
5676 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
5678 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
5681 Fixed a problem where the length of the local/common FADT was set too
5683 The local FADT table length cannot be set to the common length until the
5684 original length has been examined. There is code that checks the table
5686 and sets various fields appropriately. This can affect older machines
5688 early FADT versions. For example, this can cause inadvertent writes to
5690 CST_CNT register. Julian Anastasov.
5692 Fixed a mapping issue related to a physical table override. Use the
5694 mapping mechanism for tables loaded via the physical override OSL
5696 This allows for early mapping before the virtual memory manager is
5698 Thomas Renninger, Bob Moore.
5700 Enhanced the automatic return-object repair code: Repair a common problem
5702 predefined methods that are defined to return a variable-length Package
5704 sub-objects. If there is only one sub-object, some BIOS ASL code
5706 simply returns the single object instead of a Package with one sub-
5708 This new support will repair this error by wrapping a Package object
5710 the original object, creating the correct and expected Package with one
5712 object. Names that can be repaired in this manner include: _ALR, _CSD,
5714 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
5717 Changed the exception code returned for invalid ACPI paths passed as
5718 parameters to external interfaces such as AcpiEvaluateObject. Was
5719 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
5721 Example Code and Data Size: These are the sizes for the OS-independent
5722 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5724 version of the code includes the debug output trace mechanism and has a
5726 larger code and data size.
5729 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5730 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5732 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5733 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5736 2) iASL Compiler/Disassembler and Tools:
5738 iASL: Added the infrastructure and initial implementation of a integrated
5740 like preprocessor. This will simplify BIOS development process by
5742 the need for a separate preprocessing step during builds. On Windows, it
5744 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
5745 features including full #define() macro support are still under
5747 These preprocessor directives are supported:
5760 In addition, these new command line options are supported:
5761 -D <symbol> Define symbol for preprocessor use
5762 -li Create preprocessed output file (*.i)
5763 -P Preprocess only and create preprocessor output file (*.i)
5765 Table Compiler: Fixed a problem where the equals operator within an
5767 did not work properly.
5769 Updated iASL to use the current versions of Bison/Flex. Updated the
5771 project file to invoke these tools from the standard location. ACPICA BZ
5774 Flex for Windows: V2.5.4
5775 Bison for Windows: V2.4.1
5777 ----------------------------------------
5778 15 February 2012. Summary of changes for version 20120215:
5781 1) ACPICA Core Subsystem:
5783 There have been some major changes to the sleep/wake support code, as
5784 described below (a - e).
5786 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
5787 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
5788 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
5790 time the _BFS method is called and the _WAK method is called. NOTE: all
5792 must update their wake/resume code or else sleep/wake will not work
5796 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
5798 method. Some machines require that the GPEs are enabled before the _WAK
5800 is executed. Thomas Renninger.
5802 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
5804 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
5806 determine whether the system is rebooting or resuming. Matthew Garrett.
5808 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
5810 match the ACPI specification requirement. Rafael Wysocki.
5812 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
5813 registers within the V5 FADT. This support adds two new files:
5814 hardware/hwesleep.c implements the support for the new registers. Moved
5816 sleep/wake external interfaces to hardware/hwxfsleep.c.
5819 Added a new OSL interface for ACPI table overrides,
5820 AcpiOsPhysicalTableOverride. This interface allows the host to override a
5821 table via a physical address, instead of the logical address required by
5822 AcpiOsTableOverride. This simplifies the host implementation. Initial
5823 implementation by Thomas Renninger. The ACPICA implementation creates a
5825 shared function for table overrides that attempts both a logical and a
5828 Expanded the OSL memory read/write interfaces to 64-bit data
5829 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
5830 transfer support for GAS register structures passed to AcpiRead and
5833 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
5835 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
5837 See the ACPICA reference for details. ACPICA BZ 942. This option removes
5839 10% of the code and 5% of the static data, and the following hardware
5841 features become unavailable:
5842 PM Event and Control registers
5843 SCI interrupt (and handler)
5845 General Purpose Events (GPEs)
5848 FACS table (Waking vectors and Global Lock)
5850 Updated the unix tarball directory structure to match the ACPICA git
5852 tree. This ensures that the generic unix makefiles work properly (in
5853 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
5856 Updated the return value of the _REV predefined method to integer value 5
5858 reflect ACPI 5.0 support.
5860 Moved the external ACPI PM timer interface prototypes to the public
5862 file where they belong.
5864 Example Code and Data Size: These are the sizes for the OS-independent
5865 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5867 version of the code includes the debug output trace mechanism and has a
5869 larger code and data size.
5872 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5873 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5875 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5876 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5879 2) iASL Compiler/Disassembler and Tools:
5881 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
5882 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
5883 incorrectly displayed.
5885 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
5888 ----------------------------------------
5889 11 January 2012. Summary of changes for version 20120111:
5892 1) ACPICA Core Subsystem:
5894 Implemented a new mechanism to allow host device drivers to check for
5896 range conflicts with ACPI Operation Regions. Both SystemMemory and
5898 address spaces are supported. A new external interface,
5899 AcpiCheckAddressRange,
5900 allows drivers to check an address range against the ACPI namespace. See
5902 ACPICA reference for additional details. Adds one new file,
5903 utilities/utaddress.c. Lin Ming, Bob Moore.
5905 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
5908 Status registers, update the ACPI 5.0 flags, and update internal data
5909 structures to handle an FADT larger than 256 bytes. The size of the ACPI
5913 Updated all ACPICA copyrights and signons to 2012. Added the 2012
5915 all module headers and signons, including the standard Linux header. This
5916 affects virtually every file in the ACPICA core subsystem, iASL compiler,
5918 all ACPICA utilities.
5920 Example Code and Data Size: These are the sizes for the OS-independent
5921 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5923 version of the code includes the debug output trace mechanism and has a
5925 larger code and data size.
5928 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5929 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5931 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5932 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5935 2) iASL Compiler/Disassembler and Tools:
5937 Disassembler: fixed a problem with the automatic resource tag generation
5938 support. Fixes a problem where the resource tags are inadvertently not
5939 constructed if the table being disassembled contains external references
5941 control methods. Moved the actual construction of the tags to after the
5943 namespace is constructed (after 2nd parse is invoked due to external
5945 method references.) ACPICA BZ 941.
5947 Table Compiler: Make all "generic" operators caseless. These are the
5949 like UINT8, String, etc. Making these caseless improves ease-of-use.
5953 ----------------------------------------
5954 23 November 2011. Summary of changes for version 20111123:
5956 0) ACPI 5.0 Support:
5958 This release contains full support for the ACPI 5.0 specification, as
5961 Reduced Hardware Support:
5962 -------------------------
5964 This support allows for ACPI systems without the usual ACPI hardware.
5966 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
5968 not attempt to initialize or use any of the usual ACPI hardware. Note,
5970 this flag is set, all of the following ACPI hardware is assumed to be not
5971 present and is not initialized or accessed:
5973 General Purpose Events (GPEs)
5974 Fixed Events (PM1a/PM1b and PM Control)
5975 Power Management Timer and Console Buttons (power/sleep)
5976 Real-time Clock Alarm
5978 System Control Interrupt (SCI)
5979 The FACS is assumed to be non-existent
5984 All new tables and updates to existing tables are fully supported in the
5985 ACPICA headers (for use by device drivers), the disassembler, and the
5987 Data Table Compiler. ACPI 5.0 defines these new tables:
5989 BGRT /* Boot Graphics Resource Table */
5990 DRTM /* Dynamic Root of Trust for Measurement table */
5991 FPDT /* Firmware Performance Data Table */
5992 GTDT /* Generic Timer Description Table */
5993 MPST /* Memory Power State Table */
5994 PCCT /* Platform Communications Channel Table */
5995 PMTT /* Platform Memory Topology Table */
5996 RASF /* RAS Feature table */
5998 Operation Regions/SpaceIDs:
5999 ---------------------------
6001 All new operation regions are fully supported by the iASL compiler, the
6002 disassembler, and the ACPICA runtime code (for dispatch to region
6004 The new operation region Space IDs are:
6009 Resource Descriptors:
6010 ---------------------
6012 All new ASL resource descriptors are fully supported by the iASL
6015 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
6017 all new predefined resource tags). New descriptors are:
6026 ASL/AML Operators, New and Modified:
6027 ------------------------------------
6029 One new operator is added, the Connection operator, which is used to
6031 a GeneralPurposeIo or GenericSerialBus resource descriptor with
6033 field objects within an operation region. Several new protocols are
6035 with the AccessAs operator. All are fully supported by the iASL compiler,
6036 disassembler, and runtime ACPICA AML interpreter:
6038 Connection // Declare Field Connection
6040 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
6041 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
6043 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
6044 RawDataBuffer // Data type for Vendor Data
6047 Predefined ASL/AML Objects:
6048 ---------------------------
6050 All new predefined objects/control-methods are supported by the iASL
6052 and the ACPICA runtime validation/repair (arguments and return values.)
6054 predefined names include the following:
6056 Standard Predefined Names (Objects or Control Methods):
6057 _AEI, _CLS, _CPC, _CWS, _DEP,
6058 _DLM, _EVT, _GCP, _CRT, _GWS,
6059 _HRV, _PRE, _PSE, _SRT, _SUB.
6061 Resource Tags (Names used to access individual fields within resource
6063 _DBT, _DPL, _DRS, _END, _FLC,
6064 _IOR, _LIN, _MOD, _PAR, _PHA,
6065 _PIN, _PPI, _POL, _RXL, _SLV,
6066 _SPE, _STB, _TXL, _VEN.
6068 ACPICA External Interfaces:
6069 ---------------------------
6071 Several new interfaces have been defined for use by ACPI-related device
6072 drivers and other host OS services:
6074 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
6076 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
6077 provided by the BIOS. They are intended to be used in conjunction with
6079 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
6080 mutual exclusion with the AML code/interpreter.
6082 AcpiGetEventResources: Returns the (formatted) resource descriptors as
6084 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
6086 resource descriptors associated with hardware-reduced platform events,
6088 to the AcpiGetCurrentResources interface.
6090 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
6091 operation regions, information about the Connection() object and any
6093 length information is passed to the region handler within the Context
6096 AcpiBufferToResource: This interface converts a raw AML buffer containing
6098 resource template or resource descriptor to the ACPI_RESOURCE internal
6100 suitable for use by device drivers. Can be used by an operation region
6102 to convert the Connection() buffer object into a ACPI_RESOURCE.
6104 Miscellaneous/Tools/TestSuites:
6105 -------------------------------
6107 Support for extended _HID names (Four alpha characters instead of three).
6108 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
6109 Support for ACPI 5.0 features in the ASLTS test suite.
6110 Fully updated documentation (ACPICA and iASL reference documents.)
6112 ACPI Table Definition Language:
6113 -------------------------------
6115 Support for this language was implemented and released as a subsystem of
6117 iASL compiler in 2010. (See the iASL compiler User Guide.)
6120 Non-ACPI 5.0 changes for this release:
6121 --------------------------------------
6123 1) ACPICA Core Subsystem:
6125 Fix a problem with operation region declarations where a failure can
6128 the region name and an argument that evaluates to an object (such as the
6129 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
6132 Do not abort an ACPI table load if an invalid space ID is found within.
6134 will be caught later if the offending method is executed. ACPICA BZ 925.
6136 Fixed an issue with the FFixedHW space ID where the ID was not always
6137 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
6139 Fixed a problem with the 32-bit generation of the unix-specific OSL
6140 (osunixxf.c). Lin Ming, ACPICA BZ 936.
6142 Several changes made to enable generation with the GCC 4.6 compiler.
6146 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
6148 field registers out-of-range.
6150 2) iASL Compiler/Disassembler and Tools:
6152 iASL: Implemented the __PATH__ operator, which returns the full pathname
6154 the current source file.
6156 AcpiHelp: Automatically display expanded keyword information for all ASL
6159 Debugger: Add "Template" command to disassemble/dump resource template
6162 Added a new master script to generate and execute the ASLTS test suite.
6163 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
6165 iASL: Fix problem with listing generation during processing of the
6167 operator where AML listing was disabled until the entire Switch block was
6170 iASL: Improve support for semicolon statement terminators. Fix "invalid
6171 character" message for some cases when the semicolon is used. Semicolons
6173 now allowed after every <Term> grammar element. ACPICA BZ 927.
6175 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
6178 Disassembler: Fix problem with disassembly of the DataTableRegion
6180 where an inadvertent "Unhandled deferred opcode" message could be
6183 3) Example Code and Data Size
6185 These are the sizes for the OS-independent acpica.lib produced by the
6186 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6187 includes the debug output trace mechanism and has a much larger code and
6192 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6193 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6195 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
6196 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
6198 ----------------------------------------
6199 22 September 2011. Summary of changes for version 20110922:
6203 Support for ACPI 5.0 in ACPICA has been underway for several months and
6205 be released at the same time that ACPI 5.0 is officially released.
6207 The ACPI 5.0 specification is on track for release in the next few
6210 1) ACPICA Core Subsystem:
6212 Fixed a problem where the maximum sleep time for the Sleep() operator was
6213 intended to be limited to two seconds, but was inadvertently limited to
6217 Linux and Unix makefiles: Added header file dependencies to ensure
6219 generation of ACPICA core code and utilities. Also simplified the
6221 considerably through the use of the vpath variable to specify search
6225 2) iASL Compiler/Disassembler and Tools:
6227 iASL: Implemented support to check the access length for all fields
6229 access named Resource Descriptor fields. For example, if a resource field
6231 defined to be two bits, a warning is issued if a CreateXxxxField() is
6233 with an incorrect bit length. This is implemented for all current
6235 descriptor names. ACPICA BZ 930.
6237 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
6241 iASL: Fixed a couple of issues associated with variable-length package
6242 objects. 1) properly handle constants like One, Ones, Zero -- do not make
6244 VAR_PACKAGE when these are used as a package length. 2) Allow the
6246 opcode (in addition to PACKAGE) when validating object types for
6250 iASL: Emit statistics for all output files (instead of just the ASL input
6252 AML output). Includes listings, hex files, etc.
6254 iASL: Added -G option to the table compiler to allow the compilation of
6256 ACPI tables. The only part of a table that is required is the standard
6261 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
6263 which also adds correct 64-bit support. Also, now all output filenames
6265 completely lower case.
6267 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
6268 loading table files. A warning is issued for any such tables. The only
6269 exception is an FADT. This also fixes a possible fault when attempting to
6271 non-AML tables. ACPICA BZ 932.
6273 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
6275 missing table terminator could cause a fault when using the -p option.
6277 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
6280 3) Example Code and Data Size
6282 These are the sizes for the OS-independent acpica.lib produced by the
6283 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6284 includes the debug output trace mechanism and has a much larger code and
6288 Previous Release (VC 9.0):
6289 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6290 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6291 Current Release (VC 9.0):
6292 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6293 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6296 ----------------------------------------
6297 23 June 2011. Summary of changes for version 20110623:
6299 1) ACPI CA Core Subsystem:
6301 Updated the predefined name repair mechanism to not attempt repair of a
6303 return object if a _PSS object is present. We can only sort the _TSS
6305 package if there is no _PSS within the same scope. This is because if
6308 present, the ACPI specification dictates that the _TSS Power Dissipation
6310 is to be ignored, and therefore some BIOSs leave garbage values in the
6312 Power field(s). In this case, it is best to just return the _TSS package
6314 is. Reported by, and fixed with assistance from Fenghua Yu.
6316 Added an option to globally disable the control method return value
6318 and repair. This runtime option can be used to disable return value
6321 this is causing a problem on a particular machine. Also added an option
6323 AcpiExec (-dr) to set this disable flag.
6325 All makefiles and project files: Major changes to improve generation of
6327 tools. ACPICA BZ 912:
6328 Reduce default optimization levels to improve compatibility
6329 For Linux, add strict-aliasing=0 for gcc 4
6330 Cleanup and simplify use of command line defines
6331 Cleanup multithread library support
6332 Improve usage messages
6334 Linux-specific header: update handling of THREAD_ID and pthread. For the
6336 bit case, improve casting to eliminate possible warnings, especially with
6340 Example Code and Data Size: These are the sizes for the OS-independent
6341 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6343 version of the code includes the debug output trace mechanism and has a
6345 larger code and data size.
6347 Previous Release (VC 9.0):
6348 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6349 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6350 Current Release (VC 9.0):
6351 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6352 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6354 2) iASL Compiler/Disassembler and Tools:
6356 With this release, a new utility named "acpihelp" has been added to the
6358 package. This utility summarizes the ACPI specification chapters for the
6360 and AML languages. It generates under Linux/Unix as well as Windows, and
6361 provides the following functionality:
6362 Find/display ASL operator(s) -- with description and syntax.
6363 Find/display ASL keyword(s) -- with exact spelling and descriptions.
6364 Find/display ACPI predefined name(s) -- with description, number
6365 of arguments, and the return value data type.
6366 Find/display AML opcode name(s) -- with opcode, arguments, and
6368 Decode/display AML opcode -- with opcode name, arguments, and
6371 Service Layers: Make multi-thread support configurable. Conditionally
6373 the multi-thread support so that threading libraries will not be linked
6376 necessary. The only tool that requires multi-thread support is AcpiExec.
6378 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
6380 Bison appear to want the interface to yyerror to be a const char * (or at
6381 least this is a problem when generating iASL on some systems.) ACPICA BZ
6385 Tools: Fix for systems where O_BINARY is not defined. Only used for
6387 versions of the tools.
6389 ----------------------------------------
6390 27 May 2011. Summary of changes for version 20110527:
6392 1) ACPI CA Core Subsystem:
6394 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
6396 signature. Now, only allow SSDT, OEMx, and a null signature. History:
6397 1) Originally, we checked the table signature for "SSDT" or "PSDT".
6398 (PSDT is now obsolete.)
6399 2) We added support for OEMx tables, signature "OEM" plus a fourth
6400 "don't care" character.
6401 3) Valid tables were encountered with a null signature, so we just
6402 gave up on validating the signature, (05/2008).
6403 4) We encountered non-AML tables such as the MADT, which caused
6404 interpreter errors and kernel faults. So now, we once again allow
6405 only SSDT, OEMx, and now, also a null signature. (05/2011).
6407 Added the missing _TDL predefined name to the global name list in order
6409 enable validation. Affects both the core ACPICA code and the iASL
6412 Example Code and Data Size: These are the sizes for the OS-independent
6413 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6415 version of the code includes the debug output trace mechanism and has a
6417 larger code and data size.
6419 Previous Release (VC 9.0):
6420 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6421 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6422 Current Release (VC 9.0):
6423 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6424 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6426 2) iASL Compiler/Disassembler and Tools:
6428 Debugger/AcpiExec: Implemented support for "complex" method arguments on
6430 debugger command line. This adds support beyond simple integers --
6432 Strings, Buffers, and Packages. Includes support for nested packages.
6433 Increased the default command line buffer size to accommodate these
6435 See the ACPICA reference for details and syntax. ACPICA BZ 917.
6437 Debugger/AcpiExec: Implemented support for "default" method arguments for
6439 Execute/Debug command. Now, the debugger will always invoke a control
6441 with the required number of arguments -- even if the command line
6443 none or insufficient arguments. It uses default integer values for any
6445 arguments. Also fixes a bug where only six method arguments maximum were
6446 supported instead of the required seven.
6448 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
6450 also return status in order to prevent buffer overruns. See the ACPICA
6451 reference for details and syntax. ACPICA BZ 921
6453 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
6454 makefiles to simplify support for the two different but similar parser
6455 generators, bison and yacc.
6457 Updated the generic unix makefile for gcc 4. The default gcc version is
6459 expected to be 4 or greater, since options specific to gcc 4 are used.
6461 ----------------------------------------
6462 13 April 2011. Summary of changes for version 20110413:
6464 1) ACPI CA Core Subsystem:
6466 Implemented support to execute a so-called "orphan" _REG method under the
6468 device. This change will force the execution of a _REG method underneath
6471 device even if there is no corresponding operation region of type
6472 EmbeddedControl. Fixes a problem seen on some machines and apparently is
6473 compatible with Windows behavior. ACPICA BZ 875.
6475 Added more predefined methods that are eligible for automatic NULL
6477 element removal. This change adds another group of predefined names to
6480 of names that can be repaired by having NULL package elements dynamically
6481 removed. This group are those methods that return a single variable-
6483 package containing simple data types such as integers, buffers, strings.
6485 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
6488 and _TZD. ACPICA BZ 914.
6490 Split and segregated all internal global lock functions to a new file,
6493 Updated internal address SpaceID for DataTable regions. Moved this
6496 id in preparation for ACPI 5.0 changes that will include some new space
6499 change should not affect user/host code.
6501 Example Code and Data Size: These are the sizes for the OS-independent
6503 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6505 the code includes the debug output trace mechanism and has a much larger
6510 Previous Release (VC 9.0):
6511 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6512 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6513 Current Release (VC 9.0):
6514 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6515 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6517 2) iASL Compiler/Disassembler and Tools:
6519 iASL/DTC: Major update for new grammar features. Allow generic data types
6521 custom ACPI tables. Field names are now optional. Any line can be split
6523 multiple lines using the continuation char (\). Large buffers now use
6525 continuation character(s) and no colon on the continuation lines. See the
6527 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
6530 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
6532 Since the parser stuffs a "zero" as the return value for these statements
6535 the underlying AML grammar), they were seen as "return with value" by the
6537 semantic checking. They are now seen correctly as "null" return
6540 iASL: Check if a_REG declaration has a corresponding Operation Region.
6542 check for each _REG to ensure that there is in fact a corresponding
6544 region declaration in the same scope. If not, the _REG method is not very
6546 since it probably won't be executed. ACPICA BZ 915.
6548 iASL/DTC: Finish support for expression evaluation. Added a new
6551 that implements c-style operator precedence and parenthesization. ACPICA
6555 Disassembler/DTC: Remove support for () and <> style comments in data
6558 that DTC has full expression support, we don't want to have comment
6561 start with a parentheses or a less-than symbol. Now, only the standard /*
6564 comments are supported, as well as the bracket [] comments.
6566 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
6568 headers in the acpidump file. Update the header validation to support
6570 tables. Problem introduced in previous AcpiXtract version in the change
6572 support "wrong checksum" error messages emitted by acpidump utility.
6574 iASL: Add a * option to generate all template files (as a synonym for
6578 "iasl -T *" or "iasl -T ALL".
6580 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
6582 abort the compiler on "fatal" errors, simply should abort the current
6584 This allows multiple compiles with a single (possibly wildcard) compiler
6587 ----------------------------------------
6588 16 March 2011. Summary of changes for version 20110316:
6590 1) ACPI CA Core Subsystem:
6592 Fixed a problem caused by a _PRW method appearing at the namespace root
6594 during the setup of wake GPEs. A fault could occur if a _PRW directly
6597 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
6599 Implemented support for "spurious" Global Lock interrupts. On some
6601 global lock interrupt can occur without the pending flag being set. Upon
6604 interrupt, we now ensure that a thread is actually waiting for the lock
6606 signaling GL availability. Rafael Wysocki, Bob Moore.
6608 Example Code and Data Size: These are the sizes for the OS-independent
6610 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6612 the code includes the debug output trace mechanism and has a much larger
6617 Previous Release (VC 9.0):
6618 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6619 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6620 Current Release (VC 9.0):
6621 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6622 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6624 2) iASL Compiler/Disassembler and Tools:
6626 Implemented full support for the "SLIC" ACPI table. Includes support in
6628 header files, disassembler, table compiler, and template generator. Bob
6632 AcpiXtract: Correctly handle embedded comments and messages from
6634 Apparently some or all versions of acpidump will occasionally emit a
6637 "Wrong checksum", etc., into the dump file. This was causing problems for
6638 AcpiXtract. ACPICA BZ 905.
6640 iASL: Fix the Linux makefile by removing an inadvertent double file
6644 AcpiExec: Update installation of operation region handlers. Install one
6646 for a user-defined address space. This is used by the ASL test suite
6649 ----------------------------------------
6650 11 February 2011. Summary of changes for version 20110211:
6652 1) ACPI CA Core Subsystem:
6654 Added a mechanism to defer _REG methods for some early-installed
6656 Most user handlers should be installed before call to
6657 AcpiEnableSubsystem.
6658 However, Event handlers and region handlers should be installed after
6659 AcpiInitializeObjects. Override handlers for the "default" regions should
6661 installed early, however. This change executes all _REG methods for the
6662 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
6663 chicken/egg issues between them. ACPICA BZ 848.
6665 Implemented an optimization for GPE detection. This optimization will
6667 ignore GPE registers that contain no enabled GPEs -- there is no need to
6668 read the register since this information is available internally. This
6669 becomes more important on machines with a large GPE space. ACPICA
6671 884. Lin Ming. Suggestion from Joe Liu.
6673 Removed all use of the highly unreliable FADT revision field. The
6675 number in the FADT has been found to be completely unreliable and cannot
6677 trusted. Only the actual table length can be used to infer the version.
6679 change updates the ACPICA core and the disassembler so that both no
6681 even look at the FADT version and instead depend solely upon the FADT
6684 Fix an unresolved name issue for the no-debug and no-error-message source
6685 generation cases. The _AcpiModuleName was left undefined in these cases,
6687 it is actually needed as a parameter to some interfaces. Define
6688 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
6690 Split several large files (makefiles and project files updated)
6691 utglobal.c -> utdecode.c
6692 dbcomds.c -> dbmethod.c dbnames.c
6693 dsopcode.c -> dsargs.c dscontrol.c
6694 dsload.c -> dsload2.c
6695 aslanalyze.c -> aslbtypes.c aslwalks.c
6697 Example Code and Data Size: These are the sizes for the OS-independent
6698 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6699 debug version of the code includes the debug output trace mechanism and
6701 a much larger code and data size.
6703 Previous Release (VC 9.0):
6704 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6705 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6706 Current Release (VC 9.0):
6707 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6708 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6710 2) iASL Compiler/Disassembler and Tools:
6712 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
6713 These are useful C-style macros with the standard definitions. ACPICA
6716 iASL/DTC: Added support for integer expressions and labels. Support for
6718 expressions for all integer fields in all ACPI tables. Support for labels
6720 "generic" portions of tables such as UEFI. See the iASL reference manual.
6722 Debugger: Added a command to display the status of global handlers. The
6723 "handlers" command will display op region, fixed event, and miscellaneous
6724 global handlers. installation status -- and for op regions, whether
6726 or user-installed handler will be used.
6728 iASL: Warn if reserved method incorrectly returns a value. Many
6730 names are defined such that they do not return a value. If implemented as
6732 method, issue a warning if such a name explicitly returns a value. ACPICA
6735 iASL: Added detection of GPE method name conflicts. Detects a conflict
6737 there are two GPE methods of the form _Lxy and _Exy in the same scope.
6739 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
6741 iASL/DTC: Fixed a couple input scanner issues with comments and line
6742 numbers. Comment remover could get confused and miss a comment ending.
6744 a problem with line counter maintenance.
6746 iASL/DTC: Reduced the severity of some errors from fatal to error. There
6748 no need to abort on simple errors within a field definition.
6750 Debugger: Simplified the output of the help command. All help output now
6752 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
6754 ----------------------------------------
6755 12 January 2011. Summary of changes for version 20110112:
6757 1) ACPI CA Core Subsystem:
6759 Fixed a race condition between method execution and namespace walks that
6761 possibly cause a fault. The problem was apparently introduced in version
6762 20100528 as a result of a performance optimization that reduces the
6765 namespace walks upon method exit by using the delete_namespace_subtree
6766 function instead of the delete_namespace_by_owner function used
6768 Bug is a missing namespace lock in the delete_namespace_subtree function.
6769 dana.myers@oracle.com
6771 Fixed several issues and a possible fault with the automatic "serialized"
6772 method support. History: This support changes a method to "serialized" on
6774 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
6775 possibility that it cannot handle reentrancy. This fix repairs a couple
6777 issues seen in the field, especially on machines with many cores:
6779 1) Delete method children only upon the exit of the last thread,
6780 so as to not delete objects out from under other running threads
6781 (and possibly causing a fault.)
6782 2) Set the "serialized" bit for the method only upon the exit of the
6783 Last thread, so as to not cause deadlock when running threads
6785 3) Cleanup the use of the AML "MethodFlags" and internal method flags
6786 so that there is no longer any confusion between the two.
6788 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
6790 Debugger: Now lock the namespace for duration of a namespace dump.
6792 issues if the namespace is changing dynamically underneath the debugger.
6793 Especially affects temporary namespace nodes, since the debugger displays
6796 Updated the ordering of include files. The ACPICA headers should appear
6797 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
6799 any necessary compiler-specific defines, etc. Affects the ACPI-related
6803 Updated all ACPICA copyrights and signons to 2011. Added the 2011
6805 to all module headers and signons, including the Linux header. This
6807 virtually every file in the ACPICA core subsystem, iASL compiler, and all
6810 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
6811 project files for VC++ 6.0 are now obsolete. New project files can be
6813 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
6816 Example Code and Data Size: These are the sizes for the OS-independent
6817 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6818 debug version of the code includes the debug output trace mechanism and
6820 much larger code and data size.
6822 Previous Release (VC 6.0):
6823 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6824 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6825 Current Release (VC 9.0):
6826 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6827 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6829 2) iASL Compiler/Disassembler and Tools:
6831 iASL: Added generic data types to the Data Table compiler. Add "generic"
6833 types such as UINT32, String, Unicode, etc., to simplify the generation
6835 platform-defined tables such as UEFI. Lin Ming.
6837 iASL: Added listing support for the Data Table Compiler. Adds listing
6839 (-l) to display actual binary output for each line of input code.
6841 ----------------------------------------
6842 09 December 2010. Summary of changes for version 20101209:
6844 1) ACPI CA Core Subsystem:
6846 Completed the major overhaul of the GPE support code that was begun in
6848 2010. Major features include: removal of _PRW execution in ACPICA (host
6849 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
6850 changes to existing interfaces, simplification of GPE handler operation,
6852 a handful of new interfaces:
6858 One new file, evxfgpe.c to consolidate all external GPE interfaces.
6860 See the ACPICA Programmer Reference for full details and programming
6861 information. See the new section 4.4 "General Purpose Event (GPE)
6863 for a full overview, and section 8.7 "ACPI General Purpose Event
6865 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
6867 Bob Moore, Rafael Wysocki.
6869 Implemented a new GPE feature for Windows compatibility, the "Implicit
6871 GPE Notify". This feature will automatically issue a Notify(2) on a
6873 when a Wake GPE is received if there is no corresponding GPE method or
6874 handler. ACPICA BZ 870.
6876 Fixed a problem with the Scope() operator during table parse and load
6878 During load phase (table load or method execution), the scope operator
6880 not enter the target into the namespace. Instead, it should open a new
6882 at the target location. Linux BZ 19462, ACPICA BZ 882.
6884 Example Code and Data Size: These are the sizes for the OS-independent
6885 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6886 debug version of the code includes the debug output trace mechanism and
6888 much larger code and data size.
6891 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6892 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6894 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6895 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6897 2) iASL Compiler/Disassembler and Tools:
6899 iASL: Relax the alphanumeric restriction on _CID strings. These strings
6901 "bus-specific" per the ACPI specification, and therefore any characters
6903 acceptable. The only checks that can be performed are for a null string
6905 perhaps for a leading asterisk. ACPICA BZ 886.
6907 iASL: Fixed a problem where a syntax error that caused a premature EOF
6908 condition on the source file emitted a very confusing error message. The
6909 premature EOF is now detected correctly. ACPICA BZ 891.
6911 Disassembler: Decode the AccessSize within a Generic Address Structure
6913 access, word access, etc.) Note, this field does not allow arbitrary bit
6914 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
6916 New: AcpiNames utility - Example namespace dump utility. Shows an example
6918 ACPICA configuration for a minimal namespace dump utility. Uses table and
6919 namespace managers, but no AML interpreter. Does not add any
6921 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
6922 partition and configure ACPICA. ACPICA BZ 883.
6924 AML Debugger: Increased the debugger buffer size for method return
6926 Was 4K, increased to 16K. Also enhanced error messages for debugger
6928 execution, including the buffer overflow case.
6930 ----------------------------------------
6931 13 October 2010. Summary of changes for version 20101013:
6933 1) ACPI CA Core Subsystem:
6935 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
6937 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
6938 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
6940 Changed the type of the predefined namespace object _TZ from ThermalZone
6942 Device. This was found to be confusing to the host software that
6944 the various thermal zones, since _TZ is not really a ThermalZone.
6947 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
6950 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
6951 string is "Windows 2006 SP2".
6953 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
6955 code automatically repairs _HID-related strings, this type of code is no
6956 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
6959 Example Code and Data Size: These are the sizes for the OS-independent
6960 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6961 debug version of the code includes the debug output trace mechanism and
6963 much larger code and data size.
6966 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6967 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6969 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6970 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6972 2) iASL Compiler/Disassembler and Tools:
6974 iASL: Implemented additional compile-time validation for _HID strings.
6976 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
6979 the string must be exactly seven or eight characters. For both _HID and
6981 strings, all characters must be alphanumeric. ACPICA BZ 874.
6983 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
6984 descriptors that are mostly or all zeros, with the expectation that they
6986 be filled in at runtime. iASL now allows this as long as there is a
6988 tag" (name) associated with the descriptor, which gives the ASL a handle
6989 needed to modify the descriptor. ACPICA BZ 873.
6991 Added single-thread support to the generic Unix application OSL.
6993 for iASL support, this change removes the use of semaphores in the
6995 threaded ACPICA tools/applications - increasing performance. The
6996 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
6997 option. ACPICA BZ 879.
6999 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
7001 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
7003 iASL: Moved all compiler messages to a new file, aslmessages.h.
7005 ----------------------------------------
7006 15 September 2010. Summary of changes for version 20100915:
7008 1) ACPI CA Core Subsystem:
7010 Removed the AcpiOsDerivePciId OSL interface. The various host
7012 of this function were not OS-dependent and are now obsolete and can be
7013 removed from all host OSLs. This function has been replaced by
7014 AcpiHwDerivePciId, which is now part of the ACPICA core code.
7015 AcpiHwDerivePciId has been implemented without recursion. Adds one new
7016 module, hwpci.c. ACPICA BZ 857.
7018 Implemented a dynamic repair for _HID and _CID strings. The following
7019 problems are now repaired at runtime: 1) Remove a leading asterisk in the
7020 string, and 2) the entire string is uppercased. Both repairs are in
7021 accordance with the ACPI specification and will simplify host driver
7025 The ACPI_THREAD_ID type is no longer configurable, internally it is now
7026 always UINT64. This simplifies the ACPICA code, especially any printf
7028 UINT64 is the only common data type for all thread_id types across all
7029 operating systems. It is now up to the host OSL to cast the native
7031 type to UINT64 before returning the value to ACPICA (via
7033 Lin Ming, Bob Moore.
7035 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
7037 keyword is not standard across compilers, and this type allows inline to
7039 configured on a per-compiler basis. Lin Ming.
7041 Made the system global AcpiGbl_SystemAwakeAndRunning publicly
7043 Added an extern for this boolean in acpixf.h. Some hosts utilize this
7045 during suspend/restore operations. ACPICA BZ 869.
7047 All code that implements error/warning messages with the "ACPI:" prefix
7049 been moved to a new module, utxferror.c.
7051 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
7053 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
7055 Example Code and Data Size: These are the sizes for the OS-independent
7056 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7057 debug version of the code includes the debug output trace mechanism and
7059 much larger code and data size.
7062 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7063 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7065 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7066 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7068 2) iASL Compiler/Disassembler and Tools:
7070 iASL/Disassembler: Write ACPI errors to stderr instead of the output
7072 This keeps the output files free of random error messages that may
7074 from within the namespace/interpreter code. Used this opportunity to
7076 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
7077 866. Lin Ming, Bob Moore.
7079 Tools: update some printfs for ansi warnings on size_t. Handle width
7081 of size_t on 32-bit versus 64-bit generations. Lin Ming.
7083 ----------------------------------------
7084 06 August 2010. Summary of changes for version 20100806:
7086 1) ACPI CA Core Subsystem:
7088 Designed and implemented a new host interface to the _OSI support code.
7090 will allow the host to dynamically add or remove multiple _OSI strings,
7092 well as install an optional handler that is called for each _OSI
7094 Also added a new AML debugger command, 'osi' to display and modify the
7096 _OSI string table, and test support in the AcpiExec utility. See the
7098 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
7100 AcpiInstallInterface - Add an _OSI string.
7101 AcpiRemoveInterface - Delete an _OSI string.
7102 AcpiInstallInterfaceHandler - Install optional _OSI handler.
7104 AcpiOsValidateInterface - no longer used.
7106 source/components/utilities/utosi.c
7108 Re-introduced the support to enable multi-byte transfers for Embedded
7109 Controller (EC) operation regions. A reported problem was found to be a
7111 in the host OS, not in the multi-byte support. Previously, the maximum
7113 size passed to the EC operation region handler was a single byte. There
7115 often EC Fields larger than one byte that need to be transferred, and it
7117 useful for the EC driver to lock these as a single transaction. This
7119 enables single transfers larger than 8 bits. This effectively changes the
7120 access to the EC space from ByteAcc to AnyAcc, and will probably require
7121 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
7123 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
7125 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
7126 prototype in acpiosxf.h had the output value pointer as a (void *).
7127 It should be a (UINT64 *). This may affect some host OSL code.
7129 Fixed a couple problems with the recently modified Linux makefiles for
7131 and AcpiExec. These new makefiles place the generated object files in the
7132 local directory so that there can be no collisions between the files that
7134 shared between them that are compiled with different options.
7136 Example Code and Data Size: These are the sizes for the OS-independent
7137 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7138 debug version of the code includes the debug output trace mechanism and
7140 much larger code and data size.
7143 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7144 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7146 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7147 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7149 2) iASL Compiler/Disassembler and Tools:
7151 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
7153 namespace from and disassemble an entire group of AML files. Useful for
7154 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
7156 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
7158 iASL: Allow multiple invocations of -e option. This change allows
7160 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
7164 ----------------------------------------
7165 02 July 2010. Summary of changes for version 20100702:
7167 1) ACPI CA Core Subsystem:
7169 Implemented several updates to the recently added GPE reference count
7170 support. The model for "wake" GPEs is changing to give the host OS
7172 control of these GPEs. Eventually, the ACPICA core will not execute any
7174 methods, since the host already must execute them. Also, additional
7176 were made to help ensure that the reference counts are kept in proper
7177 synchronization with reality. Rafael J. Wysocki.
7179 1) Ensure that GPEs are not enabled twice during initialization.
7180 2) Ensure that GPE enable masks stay in sync with the reference count.
7181 3) Do not inadvertently enable GPEs when writing GPE registers.
7182 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
7183 interface. This interface will set or clear individual GPEs for wakeup.
7184 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
7186 are now used for "runtime" GPEs only.
7188 Changed the behavior of the GPE install/remove handler interfaces. The
7191 no longer disabled during this process, as it was found to cause problems
7193 some machines. Rafael J. Wysocki.
7195 Reverted a change introduced in version 20100528 to enable Embedded
7196 Controller multi-byte transfers. This change was found to cause problems
7198 Index Fields and possibly Bank Fields. It will be reintroduced when these
7199 problems have been resolved.
7201 Fixed a problem with references to Alias objects within Package Objects.
7203 reference to an Alias within the definition of a Package was not always
7204 resolved properly. Aliases to objects like Processors, Thermal zones,
7206 were resolved to the actual object instead of a reference to the object
7209 should be. Package objects are only allowed to contain integer, string,
7210 buffer, package, and reference objects. Redhat bugzilla 608648.
7212 Example Code and Data Size: These are the sizes for the OS-independent
7213 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7214 debug version of the code includes the debug output trace mechanism and
7216 much larger code and data size.
7219 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7220 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7222 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7223 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7225 2) iASL Compiler/Disassembler and Tools:
7227 iASL: Implemented a new compiler subsystem to allow definition and
7228 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
7230 are called "ACPI Data Tables", and the new compiler is the "Data Table
7231 Compiler". This compiler is intended to simplify the existing error-prone
7232 process of creating these tables for the BIOS, as well as allowing the
7233 disassembly, modification, recompilation, and override of existing ACPI
7235 tables. See the iASL User Guide for detailed information.
7237 iASL: Implemented a new Template Generator option in support of the new
7239 Table Compiler. This option will create examples of all known ACPI tables
7240 that can be used as the basis for table development. See the iASL
7241 documentation and the -T option.
7243 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
7246 Updated the Linux makefiles for iASL and AcpiExec to place the generated
7247 object files in the local directory so that there can be no collisions
7248 between the shared files between them that are generated with different
7251 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
7253 the #define __APPLE__ to enable this support.
7255 ----------------------------------------
7256 28 May 2010. Summary of changes for version 20100528:
7258 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
7259 available at www.acpi.info. This is primarily an errata release.
7261 1) ACPI CA Core Subsystem:
7263 Undefined ACPI tables: We are looking for the definitions for the
7265 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
7267 Implemented support to enable multi-byte transfers for Embedded
7269 (EC) operation regions. Previously, the maximum data size passed to the
7271 operation region handler was a single byte. There are often EC Fields
7273 than one byte that need to be transferred, and it is useful for the EC
7275 to lock these as a single transaction. This change enables single
7277 larger than 8 bits. This effectively changes the access to the EC space
7279 ByteAcc to AnyAcc, and will probably require changes to the host OS
7281 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
7283 transfers. Alexey Starikovskiy, Lin Ming
7285 Implemented a performance enhancement for namespace search and access.
7287 change enhances the performance of namespace searches and walks by adding
7289 backpointer to the parent in each namespace node. On large namespaces,
7291 change can improve overall ACPI performance by up to 9X. Adding a pointer
7293 each namespace node increases the overall size of the internal namespace
7295 about 5%, since each namespace entry usually consists of both a namespace
7296 node and an ACPI operand object. However, this is the first growth of the
7297 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
7299 Implemented a performance optimization that reduces the number of
7301 walks. On control method exit, only walk the namespace if the method is
7303 to have created namespace objects outside of its local scope. Previously,
7305 entire namespace was traversed on each control method exit. This change
7307 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
7310 Added support to truncate I/O addresses to 16 bits for Windows
7312 Some ASL code has been seen in the field that inadvertently has bits set
7313 above bit 15. This feature is optional and is enabled if the BIOS
7315 any Windows OSI strings. It can also be enabled by the host OS. Matthew
7318 Added support to limit the maximum time for the ASL Sleep() operator. To
7319 prevent accidental deep sleeps, limit the maximum time that Sleep() will
7320 actually sleep. Configurable, the default maximum is two seconds. ACPICA
7323 Added run-time validation support for the _WDG and_WED Microsoft
7325 methods. These objects are defined by "Windows Instrumentation", and are
7327 part of the ACPI spec. ACPICA BZ 860.
7329 Expanded all statistic counters used during namespace and device
7330 initialization from 16 to 32 bits in order to support very large
7333 Replaced all instances of %d in printf format specifiers with %u since
7335 all integers in ACPICA are unsigned.
7337 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
7341 Example Code and Data Size: These are the sizes for the OS-independent
7342 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7343 debug version of the code includes the debug output trace mechanism and
7345 much larger code and data size.
7348 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7349 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7351 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7352 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7354 2) iASL Compiler/Disassembler and Tools:
7356 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
7357 methods. These objects are defined by "Windows Instrumentation", and are
7359 part of the ACPI spec. ACPICA BZ 860.
7361 AcpiExec: added option to disable the memory tracking mechanism. The -dt
7362 option will disable the tracking mechanism, which improves performance
7365 AcpiExec: Restructured the command line options into -d (disable) and -e
7368 ----------------------------------------
7369 28 April 2010. Summary of changes for version 20100428:
7371 1) ACPI CA Core Subsystem:
7373 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
7374 including FADT-based and GPE Block Devices, execute any _PRW methods in
7376 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
7377 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
7378 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
7379 Devices. Provides compatibility with other ACPI implementations. Two new
7380 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
7383 Fixed a regression introduced in version 20100331 within the table
7385 where initial table loading could fail. This was introduced in the fix
7387 AcpiReallocateRootTable. Also, renamed some of fields in the table
7389 data structures to clarify their meaning and use.
7391 Fixed a possible allocation overrun during internal object copy in
7392 AcpiUtCopySimpleObject. The original code did not correctly handle the
7394 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
7397 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
7398 possible access beyond end-of-allocation. Also, now fully validate
7400 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
7402 Example Code and Data Size: These are the sizes for the OS-independent
7403 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7404 debug version of the code includes the debug output trace mechanism and
7406 much larger code and data size.
7409 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7410 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7412 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7413 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7415 2) iASL Compiler/Disassembler and Tools:
7417 iASL: Implemented Min/Max/Len/Gran validation for address resource
7418 descriptors. This change implements validation for the address fields
7420 are common to all address-type resource descriptors. These checks are
7421 implemented: Checks for valid Min/Max, length within the Min/Max window,
7422 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
7424 table 6-40 in the ACPI 4.0a specification. Also split the large
7426 and aslrestype2.c files into five new files. ACPICA BZ 840.
7428 iASL: Added support for the _Wxx predefined names. This support was
7430 and these names were not recognized by the compiler as valid predefined
7431 names. ACPICA BZ 851.
7433 iASL: Added an error for all predefined names that are defined to return
7435 value and thus must be implemented as Control Methods. These include all
7437 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
7438 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
7440 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
7442 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
7444 dynamically loaded via the Load() operator. Also cleaned up output for
7447 ta and -tc options. ACPICA BZ 853.
7449 Tests: Added a new file with examples of extended iASL error checking.
7450 Demonstrates the advanced error checking ability of the iASL compiler.
7451 Available at tests/misc/badcode.asl.
7453 ----------------------------------------
7454 31 March 2010. Summary of changes for version 20100331:
7456 1) ACPI CA Core Subsystem:
7458 Completed a major update for the GPE support in order to improve support
7460 shared GPEs and to simplify both host OS and ACPICA code. Added a
7462 count mechanism to support shared GPEs that require multiple device
7464 Several external interfaces have changed. One external interface has been
7465 removed. One new external interface was added. Most of the GPE external
7466 interfaces now use the GPE spinlock instead of the events mutex (and the
7467 Flags parameter for many GPE interfaces has been removed.) See the
7469 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
7471 Wysocki. ACPICA BZ 831.
7474 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
7480 Implemented write support for DataTable operation regions. These regions
7482 defined via the DataTableRegion() operator. Previously, only read support
7484 implemented. The ACPI specification allows DataTableRegions to be
7488 Implemented a new subsystem option to force a copy of the DSDT to local
7489 memory. Optionally copy the entire DSDT to local memory (instead of
7491 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
7493 the original DSDT, creating the need for this option. Default is FALSE,
7497 Implemented detection of a corrupted or replaced DSDT. This change adds
7498 support to detect a DSDT that has been corrupted and/or replaced from
7500 the OS (by firmware). This is typically catastrophic for the system, but
7502 been seen on some machines. Once this problem has been detected, the DSDT
7503 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
7505 Fixed two problems with AcpiReallocateRootTable during the root table
7507 When copying the root table to the new allocation, the length used was
7508 incorrect. The new size was used instead of the current table size,
7510 too much data was copied. Also, the count of available slots for ACPI
7512 was not set correctly. Alexey Starikovskiy, Bob Moore.
7514 Example Code and Data Size: These are the sizes for the OS-independent
7515 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7516 debug version of the code includes the debug output trace mechanism and
7518 much larger code and data size.
7521 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7522 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7524 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7525 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7527 2) iASL Compiler/Disassembler and Tools:
7529 iASL: Implement limited typechecking for values returned from predefined
7530 control methods. The type of any returned static (unnamed) object is now
7531 validated. For example, Return(1). ACPICA BZ 786.
7533 iASL: Fixed a predefined name object verification regression. Fixes a
7535 introduced in version 20100304. An error is incorrectly generated if a
7536 predefined name is declared as a static named object with a value defined
7537 using the keywords "Zero", "One", or "Ones". Lin Ming.
7539 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
7541 reducing the requested registry access rights. ACPICA BZ 842.
7543 Disassembler: fixed a possible fault when generating External()
7545 Introduced in commit ae7d6fd: Properly handle externals with parent-
7547 (carat). Fixes a string length allocation calculation. Lin Ming.
7549 ----------------------------------------
7550 04 March 2010. Summary of changes for version 20100304:
7552 1) ACPI CA Core Subsystem:
7554 Fixed a possible problem with the AML Mutex handling function
7555 AcpiExReleaseMutex where the function could fault under the very rare
7556 condition when the interpreter has blocked, the interpreter lock is
7558 the interpreter is then reentered via the same thread, and attempts to
7559 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
7563 Implemented additional configuration support for the AML "Debug Object".
7564 Output from the debug object can now be enabled via a global variable,
7565 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
7567 This debug output is now available in the release version of ACPICA
7569 of just the debug version. Also, the entire debug output module can now
7571 configured out of the ACPICA build if desired. One new file added,
7572 executer/exdebug.c. Lin Ming, Bob Moore.
7574 Added header support for the ACPI MCHI table (Management Controller Host
7575 Interface Table). This table was added in ACPI 4.0, but the defining
7577 has only recently become available.
7579 Standardized output of integer values for ACPICA warnings/errors. Always
7581 0x prefix for hex output, always use %u for unsigned integer decimal
7583 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
7585 invocations.) These invocations were converted from the original
7586 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
7588 Example Code and Data Size: These are the sizes for the OS-independent
7589 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7590 debug version of the code includes the debug output trace mechanism and
7592 much larger code and data size.
7595 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7596 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7598 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7599 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7601 2) iASL Compiler/Disassembler and Tools:
7603 iASL: Implemented typechecking support for static (non-control method)
7604 predefined named objects that are declared with the Name() operator. For
7605 example, the type of this object is now validated to be of type Integer:
7606 Name(_BBN, 1). This change migrates the compiler to using the core
7608 name table instead of maintaining a local version. Added a new file,
7609 aslpredef.c. ACPICA BZ 832.
7611 Disassembler: Added support for the ACPI 4.0 MCHI table.
7613 ----------------------------------------
7614 21 January 2010. Summary of changes for version 20100121:
7616 1) ACPI CA Core Subsystem:
7618 Added the 2010 copyright to all module headers and signons. This affects
7619 virtually every file in the ACPICA core subsystem, the iASL compiler, the
7620 tools/utilities, and the test suites.
7622 Implemented a change to the AcpiGetDevices interface to eliminate
7624 invocations of the _STA method. In the case where a specific _HID is
7625 requested, do not run _STA until a _HID match is found. This eliminates
7626 potentially dozens of _STA calls during a search for a particular
7628 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
7630 Implemented an additional repair for predefined method return values.
7632 to repair unexpected NULL elements within returned Package objects.
7635 Integer of value zero, a NULL String, or a zero-length Buffer as
7637 ACPICA BZ 818. Lin Ming, Bob Moore.
7639 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
7641 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
7643 64-bit AML integers). It is now obsolete and this change removes it from
7645 ACPICA code base, replaced by UINT64. The original typedef has been
7647 for now for compatibility with existing device driver code. ACPICA BZ
7650 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
7652 the parse tree object.
7654 Added additional warning options for the gcc-4 generation. Updated the
7656 accordingly. This includes some code restructuring to eliminate
7658 code, elimination of some gotos, elimination of unused return values,
7660 additional casting, and removal of redundant declarations.
7662 Example Code and Data Size: These are the sizes for the OS-independent
7663 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7664 debug version of the code includes the debug output trace mechanism and
7666 much larger code and data size.
7669 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7670 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7672 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7673 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7675 2) iASL Compiler/Disassembler and Tools:
7677 No functional changes for this release.
7679 ----------------------------------------
7680 14 December 2009. Summary of changes for version 20091214:
7682 1) ACPI CA Core Subsystem:
7684 Enhanced automatic data type conversions for predefined name repairs.
7686 change expands the automatic repairs/conversions for predefined name
7688 values to make Integers, Strings, and Buffers fully interchangeable.
7691 Buffer can be converted to a Package of Integers if necessary. The
7693 module was completely restructured. Lin Ming, Bob Moore.
7695 Implemented automatic removal of null package elements during predefined
7697 repairs. This change will automatically remove embedded and trailing NULL
7698 package elements from returned package objects that are defined to
7701 variable number of sub-packages. The driver is then presented with a
7703 with no null elements to deal with. ACPICA BZ 819.
7705 Implemented a repair for the predefined _FDE and _GTM names. The expected
7706 return value for both names is a Buffer of 5 DWORDs. This repair fixes
7708 possible problems (both seen in the field), where a package of integers
7710 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
7713 Implemented additional module-level code support. This change will
7715 execute module-level code that is not at the root of the namespace (under
7717 Device object, etc.). Now executes the code within the current scope
7719 of the root. ACPICA BZ 762. Lin Ming.
7721 Fixed possible mutex acquisition errors when running _REG methods. Fixes
7723 problem where mutex errors can occur when running a _REG method that is
7725 the same scope as a method-defined operation region or an operation
7727 under a module-level IF block. This type of code is rare, so the problem
7729 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
7731 Fixed a possible memory leak during module-level code execution. An
7733 could be leaked for each block of executed module-level code if the
7734 interpreter slack mode is enabled This change deletes any implicitly
7736 object from the module-level code block. Lin Ming.
7738 Removed messages for successful predefined repair(s). The repair
7740 was considered too wordy. Now, messages are only unconditionally emitted
7742 the return object cannot be repaired. Existing messages for successful
7743 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
7746 Example Code and Data Size: These are the sizes for the OS-independent
7747 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7748 debug version of the code includes the debug output trace mechanism and
7750 much larger code and data size.
7753 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7754 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7756 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7757 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7759 2) iASL Compiler/Disassembler and Tools:
7761 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
7763 were no longer automatically removed at the termination of the compile.
7765 acpiexec: Implemented the -f option to specify default region fill value.
7766 This option specifies the value used to initialize buffers that simulate
7767 operation regions. Default value is zero. Useful for debugging problems
7769 depend on a specific initial value for a region or field.
7771 ----------------------------------------
7772 12 November 2009. Summary of changes for version 20091112:
7774 1) ACPI CA Core Subsystem:
7776 Implemented a post-order callback to AcpiWalkNamespace. The existing
7777 interface only has a pre-order callback. This change adds an additional
7778 parameter for a post-order callback which will be more useful for bus
7780 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
7782 Modified the behavior of the operation region memory mapping cache for
7783 SystemMemory. Ensure that the memory mappings created for operation
7785 do not cross 4K page boundaries. Crossing a page boundary while mapping
7786 regions can cause kernel warnings on some hosts if the pages have
7788 attributes. Such regions are probably BIOS bugs, and this is the
7790 Linux BZ 14445. Lin Ming.
7792 Implemented an automatic repair for predefined methods that must return
7793 sorted lists. This change will repair (by sorting) packages returned by
7795 _PSS, and _TSS. Drivers can now assume that the packages are correctly
7797 and do not contain NULL package elements. Adds one new file,
7798 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
7800 Fixed a possible fault during predefined name validation if a return
7802 object contains NULL elements. Also adds a warning if a NULL element is
7803 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
7805 include repair or removal of all such NULL elements where possible.
7807 Implemented additional module-level executable AML code support. This
7809 will execute module-level code that is not at the root of the namespace
7810 (under a Device object, etc.) at table load time. Module-level executable
7812 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
7814 Implemented a new internal function to create Integer objects. This
7816 simplifies miscellaneous object creation code. ACPICA BZ 823.
7818 Reduced the severity of predefined repair messages, Warning to Info.
7820 the object was successfully repaired, a warning is too severe. Reduced to
7822 info message for now. These messages may eventually be changed to debug-
7826 Example Code and Data Size: These are the sizes for the OS-independent
7827 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7828 debug version of the code includes the debug output trace mechanism and
7830 much larger code and data size.
7833 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7834 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7836 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7837 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7839 2) iASL Compiler/Disassembler and Tools:
7841 iASL: Implemented Switch() with While(1) so that Break works correctly.
7843 change correctly implements the Switch operator with a surrounding
7845 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
7847 iASL: Added a message if a package initializer list is shorter than
7849 length. Adds a new remark for a Package() declaration if an initializer
7851 exists, but is shorter than the declared length of the package. Although
7852 technically legal, this is probably a coding error and it is seen in the
7853 field. ACPICA BZ 815. Lin Ming, Bob Moore.
7855 iASL: Fixed a problem where the compiler could fault after the maximum
7857 of errors was reached (200).
7859 acpixtract: Fixed a possible warning for pointer cast if the compiler
7861 level set very high.
7863 ----------------------------------------
7864 13 October 2009. Summary of changes for version 20091013:
7866 1) ACPI CA Core Subsystem:
7868 Fixed a problem where an Operation Region _REG method could be executed
7870 than once. If a custom address space handler is installed by the host
7872 the "initialize operation regions" phase of the ACPICA initialization,
7874 _REG methods for that address space could be executed twice. This change
7875 fixes the problem. ACPICA BZ 427. Lin Ming.
7877 Fixed a possible memory leak for the Scope() ASL operator. When the exact
7878 invocation of "Scope(\)" is executed (change scope to root), one internal
7879 operand object was leaked. Lin Ming.
7881 Implemented a run-time repair for the _MAT predefined method. If the _MAT
7882 return value is defined as a Field object in the AML, and the field
7883 size is less than or equal to the default width of an integer (32 or
7885 can incorrectly return an Integer instead of a Buffer. ACPICA now
7886 automatically repairs this problem. ACPICA BZ 810.
7888 Implemented a run-time repair for the _BIF and _BIX predefined methods.
7890 "OEM Information" field is often incorrectly returned as an Integer with
7891 value zero if the field is not supported by the platform. This is due to
7893 ambiguity in the ACPI specification. The field should always be a string.
7894 ACPICA now automatically repairs this problem by returning a NULL string
7895 within the returned Package. ACPICA BZ 807.
7897 Example Code and Data Size: These are the sizes for the OS-independent
7898 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7899 debug version of the code includes the debug output trace mechanism and
7901 much larger code and data size.
7904 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7905 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7907 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7908 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7910 2) iASL Compiler/Disassembler and Tools:
7912 Disassembler: Fixed a problem where references to external symbols that
7913 contained one or more parent-prefixes (carats) were not handled
7915 possibly causing a fault. ACPICA BZ 806. Lin Ming.
7917 Disassembler: Restructured the code so that all functions that handle
7918 external symbols are in a single module. One new file is added,
7921 AML Debugger: Added a max count argument for the Batch command (which
7922 executes multiple predefined methods within the namespace.)
7924 iASL: Updated the compiler documentation (User Reference.) Available at
7925 http://www.acpica.org/documentation/. ACPICA BZ 750.
7927 AcpiXtract: Updated for Lint and other formatting changes. Close all open
7930 ----------------------------------------
7931 03 September 2009. Summary of changes for version 20090903:
7933 1) ACPI CA Core Subsystem:
7935 For Windows Vista compatibility, added the automatic execution of an _INI
7936 method located at the namespace root (\_INI). This method is executed at
7937 table load time. This support is in addition to the automatic execution
7939 \_SB._INI. Lin Ming.
7941 Fixed a possible memory leak in the interpreter for AML package objects
7943 the package initializer list is longer than the defined size of the
7945 This apparently can only happen if the BIOS changes the package size on
7947 fly (seen in a _PSS object), as ASL compilers do not allow this. The
7948 interpreter will truncate the package to the defined size (and issue an
7950 message), but previously could leave the extra objects undeleted if they
7952 pre-created during the argument processing (such is the case if the
7954 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
7956 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
7957 This has been reported in the field. Previously, ACPICA would zero out
7959 buffer/string. Now, the operation is treated as a noop. Provides Windows
7960 compatibility. ACPICA BZ 803. Lin Ming.
7962 Removed an extraneous error message for ASL constructs of the form
7963 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
7965 are seen in many BIOSs and are once again treated as NOOPs and no error
7967 emitted when they are encountered. ACPICA BZ 785.
7969 Fixed an extraneous warning message if a _DSM reserved method returns a
7970 Package object. _DSM can return any type of object, so validation on the
7971 return type cannot be performed. ACPICA BZ 802.
7973 Example Code and Data Size: These are the sizes for the OS-independent
7974 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7975 debug version of the code includes the debug output trace mechanism and
7977 much larger code and data size.
7980 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7981 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7983 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7984 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7986 2) iASL Compiler/Disassembler and Tools:
7988 iASL: Fixed a problem with the use of the Alias operator and Resource
7989 Templates. The correct alias is now constructed and no error is emitted.
7992 iASL: Implemented the -I option to specify additional search directories
7994 include files. Allows multiple additional search paths for include files.
7995 Directories are searched in the order specified on the command line
7997 the local directory is searched.) ACPICA BZ 800.
7999 iASL: Fixed a problem where the full pathname for include files was not
8000 emitted for warnings/errors. This caused the IDE support to not work
8001 properly. ACPICA BZ 765.
8003 iASL: Implemented the -@ option to specify a Windows-style response file
8004 containing additional command line options. ACPICA BZ 801.
8006 AcpiExec: Added support to load multiple AML files simultaneously (such
8009 DSDT and multiple SSDTs). Also added support for wildcards within the AML
8010 pathname. These features allow all machine tables to be easily loaded and
8011 debugged together. ACPICA BZ 804.
8013 Disassembler: Added missing support for disassembly of HEST table Error
8017 ----------------------------------------
8018 30 July 2009. Summary of changes for version 20090730:
8020 The ACPI 4.0 implementation for ACPICA is complete with this release.
8022 1) ACPI CA Core Subsystem:
8024 ACPI 4.0: Added header file support for all new and changed ACPI tables.
8025 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
8027 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
8029 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
8031 have been some ACPI 4.0 changes to other existing tables. Split the large
8032 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
8034 ACPI 4.0: Implemented predefined name validation for all new names. There
8036 31 new names in ACPI 4.0. The predefined validation module was split into
8038 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
8040 Implemented support for so-called "module-level executable code". This is
8041 executable AML code that exists outside of any control method and is
8043 to be executed at table load time. Although illegal since ACPI 2.0, this
8045 of code still exists and is apparently still being created. Blocks of
8047 code are now detected and executed as intended. Currently, the code
8049 must exist under either an If, Else, or While construct; these are the
8050 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
8052 Implemented an automatic dynamic repair for predefined names that return
8053 nested Package objects. This applies to predefined names that are defined
8055 return a variable-length Package of sub-packages. If the number of sub-
8056 packages is one, BIOS code is occasionally seen that creates a simple
8058 package with no sub-packages. This code attempts to fix the problem by
8059 wrapping a new package object around the existing package. These methods
8061 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
8065 Fixed a regression introduced in 20090625 for the AcpiGetDevices
8067 The _HID/_CID matching was broken and no longer matched IDs correctly.
8071 Fixed a problem with AcpiReset where the reset would silently fail if the
8072 register was one of the protected I/O ports. AcpiReset now bypasses the
8074 validation mechanism. This may eventually be driven into the
8078 Fixed a regression related to the recent update of the AcpiRead/Write
8079 interfaces. A sleep/suspend could fail if the optional PM2 Control
8081 does not exist during an attempt to write the Bus Master Arbitration bit.
8082 (However, some hosts already delete the code that writes this bit, and
8084 code may in fact be obsolete at this date.) ACPICA BZ 799.
8086 Fixed a problem where AcpiTerminate could fault if inadvertently called
8088 in succession. ACPICA BZ 795.
8090 Example Code and Data Size: These are the sizes for the OS-independent
8091 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8092 debug version of the code includes the debug output trace mechanism and
8094 much larger code and data size.
8097 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8098 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8100 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
8101 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
8103 2) iASL Compiler/Disassembler and Tools:
8105 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
8106 changes to existing tables. ACPICA BZ 775.
8108 ----------------------------------------
8109 25 June 2009. Summary of changes for version 20090625:
8111 The ACPI 4.0 Specification was released on June 16 and is available at
8112 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
8113 continue for the next few releases.
8115 1) ACPI CA Core Subsystem:
8117 ACPI 4.0: Implemented interpreter support for the IPMI operation region
8118 address space. Includes support for bi-directional data buffers and an
8120 address space handler (to be installed by an IPMI device driver.) ACPICA
8124 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
8126 support in both the header files and the disassembler.
8128 Completed a major update for the AcpiGetObjectInfo external interface.
8130 - Support for variable, unlimited length HID, UID, and CID strings.
8131 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
8133 - Call the _SxW power methods on behalf of a device object.
8134 - Determine if a device is a PCI root bridge.
8135 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
8136 These changes will require an update to all callers of this interface.
8138 the updated ACPICA Programmer Reference for details. One new source file
8140 been added - utilities/utids.c. ACPICA BZ 368, 780.
8142 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
8143 transfers. The Value parameter has been extended from 32 bits to 64 bits
8145 order to support new ACPI 4.0 tables. These changes will require an
8148 all callers of these interfaces. See the ACPICA Programmer Reference for
8149 details. ACPICA BZ 768.
8151 Fixed several problems with AcpiAttachData. The handler was not invoked
8153 the host node was deleted. The data sub-object was not automatically
8155 when the host node was deleted. The interface to the handler had an
8157 parameter, this was removed. ACPICA BZ 778.
8159 Enhanced the function that dumps ACPI table headers. All non-printable
8160 characters in the string fields are now replaced with '?' (Signature,
8162 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
8163 these fields are occasionally seen in the field. ACPICA BZ 788.
8165 Fixed a problem with predefined method repair code where the code that
8166 attempts to repair/convert an object of incorrect type is only executed
8168 the first time the predefined method is called. The mechanism that
8170 warnings on subsequent calls was interfering with the repair mechanism.
8173 Fixed a possible memory leak in the predefined validation/repair code
8176 buffer is automatically converted to an expected string object.
8178 Removed obsolete 16-bit files from the distribution and from the current
8180 tree head. ACPICA BZ 776.
8182 Example Code and Data Size: These are the sizes for the OS-independent
8183 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8184 debug version of the code includes the debug output trace mechanism and
8186 much larger code and data size.
8189 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8190 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8192 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8193 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8195 2) iASL Compiler/Disassembler and Tools:
8197 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
8198 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
8200 ACPI 4.0: iASL - implemented compile-time validation support for all new
8201 predefined names and control methods (31 total). ACPICA BZ 769.
8203 ----------------------------------------
8204 21 May 2009. Summary of changes for version 20090521:
8206 1) ACPI CA Core Subsystem:
8208 Disabled the preservation of the SCI enable bit in the PM1 control
8210 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
8213 a "preserved" bit - "OSPM always preserves this bit position", section
8214 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
8215 because the bit needs to be explicitly set by the OS as a workaround. No
8216 machines fail if the bit is not preserved. Therefore, ACPICA no longer
8217 attempts to preserve this bit.
8219 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
8220 incorrectly formed _PRT package could cause a fault. Added validation to
8221 ensure that each package element is actually a sub-package.
8223 Implemented a new interface to install or override a single control
8225 AcpiInstallMethod. This interface is useful when debugging in order to
8227 an existing method or to install a missing method without having to
8229 the entire ACPI table. See the ACPICA Programmer Reference for use and
8230 examples. Lin Ming, Bob Moore.
8232 Fixed several reference count issues with the DdbHandle object that is
8233 created from a Load or LoadTable operator. Prevent premature deletion of
8235 object. Also, mark the object as invalid once the table has been
8237 This is needed because the handle itself may not be deleted after the
8239 unload, depending on whether it has been stored in a named object by the
8242 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
8243 mutexes of the same sync level are acquired but then not released in
8245 opposite order, the internally maintained Current Sync Level becomes
8247 and can cause subsequent execution errors. ACPICA BZ 471.
8249 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
8250 specification has been changed to make the SyncLevel for mutex objects
8252 useful. When releasing a mutex, the SyncLevel of the mutex must now be
8254 same as the current sync level. This makes more sense than the previous
8256 (SyncLevel less than or equal). This change updates the code to match the
8259 Fixed a problem with the local version of the AcpiOsPurgeCache function.
8261 (local) cache must be locked during all cache object deletions. Andrew
8264 Updated the Load operator to use operation region interfaces. This
8266 direct memory mapping with region access calls. Now, all region accesses
8268 through the installed region handler as they should.
8270 Simplified and optimized the NsGetNextNode function. Reduced parameter
8272 and reduced code for this frequently used function.
8274 Example Code and Data Size: These are the sizes for the OS-independent
8275 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8276 debug version of the code includes the debug output trace mechanism and
8278 much larger code and data size.
8281 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8282 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8284 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8285 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8287 2) iASL Compiler/Disassembler and Tools:
8289 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
8291 with sub-table disassembly and handling invalid sub-tables. Attempt
8293 after an invalid sub-table ID.
8295 ----------------------------------------
8296 22 April 2009. Summary of changes for version 20090422:
8298 1) ACPI CA Core Subsystem:
8300 Fixed a compatibility issue with the recently released I/O port
8302 mechanism. For windows compatibility, 1) On a port protection violation,
8303 simply ignore the request and do not return an exception (allow the
8305 method to continue execution.) 2) If only part of the request overlaps a
8306 protected port, read/write the individual ports that are not protected.
8310 Enhanced the execution of the ASL/AML BreakPoint operator so that it
8312 breaks into the AML debugger if the debugger is present. This matches the
8313 ACPI-defined behavior.
8315 Fixed several possible warnings related to the use of the configurable
8316 ACPI_THREAD_ID. This type can now be configured as either an integer or a
8317 pointer with no warnings. Also fixes several warnings in printf-like
8318 statements for the 64-bit build when the type is configured as a pointer.
8321 Fixed a number of possible warnings when compiling with gcc 4+ (depending
8323 warning options.) Examples include printf formats, aliasing, unused
8325 missing prototypes, missing switch default statements, use of non-ANSI
8326 library functions, use of non-ANSI constructs. See generate/unix/Makefile
8328 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
8330 Example Code and Data Size: These are the sizes for the OS-independent
8331 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8332 debug version of the code includes the debug output trace mechanism and
8334 much larger code and data size.
8337 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8338 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8340 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8341 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8343 2) iASL Compiler/Disassembler and Tools:
8345 iASL: Fixed a generation warning from Bison 2.3 and fixed several
8350 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
8352 correctly digest Windows/DOS formatted files (with CR/LF).
8354 iASL: Added a new option for "quiet mode" (-va) that produces only the
8355 compilation summary, not individual errors and warnings. Useful for large
8358 AcpiExec: Implemented a new option (-z) to enable a forced
8360 timeout that can be used to detect hang conditions during execution of
8362 code (includes both internal semaphores and AML-defined mutexes and
8365 Added new makefiles for the generation of acpica in a generic unix-like
8366 environment. These makefiles are intended to generate the acpica tools
8368 utilities from the original acpica git source tree structure.
8370 Test Suites: Updated and cleaned up the documentation files. Updated the
8371 copyrights to 2009, affecting all source files. Use the new version of
8373 with quiet mode. Increased the number of available semaphores in the
8375 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
8377 an alternate implementation of the semaphore timeout to allow aslts to
8378 execute fully on Cygwin.
8380 ----------------------------------------
8381 20 March 2009. Summary of changes for version 20090320:
8383 1) ACPI CA Core Subsystem:
8385 Fixed a possible race condition between AcpiWalkNamespace and dynamic
8387 unloads. Added a reader/writer locking mechanism to allow multiple
8389 namespace walks (readers), but block a dynamic table unload until it can
8391 exclusive write access to the namespace. This fixes a problem where a
8393 unload could (possibly catastrophically) delete the portion of the
8395 that is currently being examined by a walk. Adds a new file, utlock.c,
8397 implements the reader/writer lock mechanism. ACPICA BZ 749.
8399 Fixed a regression introduced in version 20090220 where a change to the
8401 handling could cause the ACPICA subsystem to access non-existent I/O
8404 Modified the handling of FADT register and table (FACS/DSDT) addresses.
8406 FADT can contain both 32-bit and 64-bit versions of these addresses.
8407 Previously, the 64-bit versions were favored, meaning that if both 32 and
8409 versions were valid, but not equal, the 64-bit version was used. This was
8410 found to cause some machines to fail. Now, in this case, the 32-bit
8412 is used instead. This now matches the Windows behavior.
8414 Implemented a new mechanism to protect certain I/O ports. Provides
8416 compatibility and protects the standard PC I/O ports from access via AML
8417 code. Adds a new file, hwvalid.c
8419 Fixed a possible extraneous warning message from the FADT support. The
8420 message warns of a 32/64 length mismatch between the legacy and GAS
8421 definitions for a register.
8423 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
8425 made obsolete by the port protection mechanism above. It was previously
8427 to validate the entire address range of an operation region, which could
8429 incorrect if the range included illegal ports, but fields within the
8430 operation region did not actually access those ports. Validation is now
8431 performed on a per-field basis instead of the entire region.
8433 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
8434 Ignored bits must be "preserved" according to the ACPI spec. Usually,
8436 means a read/modify/write when writing to the register. However, for
8438 registers, writing a one means clear the event. Writing a zero means
8440 the event (do not clear.) This behavior is clarified in the ACPI 4.0
8442 and the ACPICA code now simply always writes a zero to the ignored bit.
8444 Modified the handling of ignored bits for the PM1 A/B Control Registers.
8446 per the ACPI specification, for the control registers, preserve
8447 (read/modify/write) all bits that are defined as either reserved or
8450 Updated the handling of write-only bits in the PM1 A/B Control Registers.
8451 When reading the register, zero the write-only bits as per the ACPI spec.
8452 ACPICA BZ 443. Lin Ming.
8454 Removed "Linux" from the list of supported _OSI strings. Linux no longer
8455 wants to reply true to this request. The Windows strings are the only
8457 through the AML that are tested and known to work properly.
8460 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8461 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8463 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8464 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8466 2) iASL Compiler/Disassembler and Tools:
8468 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
8472 ----------------------------------------
8473 20 February 2009. Summary of changes for version 20090220:
8475 1) ACPI CA Core Subsystem:
8477 Optimized the ACPI register locking. Removed locking for reads from the
8479 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
8481 not required when reading the single-bit registers. The
8482 AcpiGetRegisterUnlocked function is no longer needed and has been
8484 This will improve performance for reads on these registers. ACPICA BZ
8487 Fixed the parameter validation for AcpiRead/Write. Now return
8488 AE_BAD_PARAMETER if the input register pointer is null, and
8491 the register has an address of zero. Previously, these cases simply
8493 AE_OK. For optional registers such as PM1B status/enable/control, the
8495 should check for a valid register address before calling. ACPICA BZ 748.
8497 Renamed the external ACPI bit register access functions. Renamed
8498 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
8499 functions. The new names are AcpiReadBitRegister and
8500 AcpiWriteBitRegister.
8501 Also, restructured the code for these functions by simplifying the code
8503 and condensing duplicate code to reduce code size.
8505 Added new functions to transparently handle the possibly split PM1 A/B
8506 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
8508 now handle the split registers for PM1 Status, Enable, and Control.
8513 Added a function to handle the PM1 control registers,
8514 AcpiHwWritePm1Control.
8515 This function writes both of the PM1 control registers (A/B). These
8517 are different than the PM1 A/B status and enable registers in that
8519 values can be written to the A/B registers. Most notably, the SLP_TYP
8521 can be different, as per the values returned from the _Sx predefined
8524 Removed an extra register write within AcpiHwClearAcpiStatus. This
8526 was writing an optional PM1B status register twice. The existing call to
8528 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
8530 register. ACPICA BZ 751.
8532 Split out the PM1 Status registers from the FADT. Added new globals for
8534 registers (A/B), similar to the way the PM1 Enable registers are handled.
8535 Instead of overloading the FADT Event Register blocks. This makes the
8537 clearer and less prone to error.
8539 Fixed the warning message for when the platform contains too many ACPI
8541 for the default size of the global root table data structure. The
8543 for the truncation value was incorrect.
8545 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
8546 obsolete macro, since it is now a simple reference to ->common.type.
8548 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
8550 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
8551 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
8552 simply SLEEP_TYPE. ACPICA BZ 754.
8554 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
8555 function is only needed on 64-bit host operating systems and is thus not
8556 included for 32-bit hosts.
8558 Debug output: print the input and result for invocations of the _OSI
8560 control method via the ACPI_LV_INFO debug level. Also, reduced some of
8562 verbosity of this debug level. Len Brown.
8564 Example Code and Data Size: These are the sizes for the OS-independent
8565 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8566 debug version of the code includes the debug output trace mechanism and
8568 much larger code and data size.
8571 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8572 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8574 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8575 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8577 2) iASL Compiler/Disassembler and Tools:
8579 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
8580 various legal performance profiles.
8582 ----------------------------------------
8583 23 January 2009. Summary of changes for version 20090123:
8585 1) ACPI CA Core Subsystem:
8587 Added the 2009 copyright to all module headers and signons. This affects
8588 virtually every file in the ACPICA core subsystem, the iASL compiler, and
8589 the tools/utilities.
8591 Implemented a change to allow the host to override any ACPI table,
8593 dynamically loaded tables. Previously, only the DSDT could be replaced by
8595 host. With this change, the AcpiOsTableOverride interface is called for
8597 table found in the RSDT/XSDT during ACPICA initialization, and also
8599 a table is dynamically loaded via the AML Load operator.
8601 Updated FADT flag definitions, especially the Boot Architecture flags.
8603 Debugger: For the Find command, automatically pad the input ACPI name
8605 underscores if the name is shorter than 4 characters. This enables a
8607 with the actual namespace entry which is itself padded with underscores.
8609 Example Code and Data Size: These are the sizes for the OS-independent
8610 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8611 debug version of the code includes the debug output trace mechanism and
8613 much larger code and data size.
8616 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8617 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8619 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8620 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8622 2) iASL Compiler/Disassembler and Tools:
8624 Fix build error under Bison-2.4.
8626 Dissasembler: Enhanced FADT support. Added decoding of the Boot
8628 flags. Now decode all flags, regardless of the FADT version. Flag output
8629 includes the FADT version which first defined each flag.
8631 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
8633 DSDT). Windows only.
8635 ----------------------------------------
8636 04 December 2008. Summary of changes for version 20081204:
8638 1) ACPI CA Core Subsystem:
8640 The ACPICA Programmer Reference has been completely updated and revamped
8642 this release. This includes updates to the external interfaces, OSL
8643 interfaces, the overview sections, and the debugger reference.
8645 Several new ACPICA interfaces have been implemented and documented in the
8646 programmer reference:
8647 AcpiReset - Writes the reset value to the FADT-defined reset register.
8648 AcpiDisableAllGpes - Disable all available GPEs.
8649 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
8650 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
8651 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
8652 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
8653 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
8655 Most of the public ACPI hardware-related interfaces have been moved to a
8657 file, components/hardware/hwxface.c
8659 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
8660 register lengths within the FADT are now used, and the low level ACPI
8661 register access no longer hardcodes the ACPI register lengths. Given that
8662 there may be some risk in actually trusting the FADT register lengths, a
8664 time option was added to fall back to the default hardcoded lengths if
8666 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
8667 option is set to true for now, and a warning is issued if a suspicious
8669 register length is overridden with the default value.
8671 Fixed a reference count issue in NsRepairObject. This problem was
8673 in version 20081031 as part of a fix to repair Buffer objects within
8676 Added semaphore support to the Linux/Unix application OS-services layer
8677 (OSL). ACPICA BZ 448. Lin Ming.
8679 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
8681 be implemented in the OSL, or will binary semaphores be used instead.
8683 Example Code and Data Size: These are the sizes for the OS-independent
8684 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8685 debug version of the code includes the debug output trace mechanism and
8687 much larger code and data size.
8690 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8691 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8693 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8694 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8696 2) iASL Compiler/Disassembler and Tools:
8698 iASL: Completed the '-e' option to include additional ACPI tables in
8701 aid with disassembly and External statement generation. ACPICA BZ 742.
8705 iASL: Removed the "named object in while loop" error. The compiler cannot
8706 determine how many times a loop will execute. ACPICA BZ 730.
8708 Disassembler: Implemented support for FADT revision 2 (MS extension).
8712 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
8715 ----------------------------------------
8716 31 October 2008. Summary of changes for version 20081031:
8718 1) ACPI CA Core Subsystem:
8720 Restructured the ACPICA header files into public/private. acpi.h now
8722 only the "public" acpica headers. All other acpica headers are "private"
8724 should not be included by acpica users. One new file, accommon.h is used
8726 include the commonly used private headers for acpica code generation.
8728 plans include moving all private headers to a new subdirectory.
8730 Implemented an automatic Buffer->String return value conversion for
8731 predefined ACPI methods. For these methods (such as _BIF), added
8733 conversion for return objects that are required to be a String, but a
8735 was found instead. This can happen when reading string battery data from
8737 operation region, because it used to be difficult to convert the data
8739 buffer to string from within the ASL. Ensures that the host OS is
8741 with a valid null-terminated string. Linux BZ 11822.
8743 Updated the FACS waking vector interfaces. Split
8744 AcpiSetFirmwareWakingVector
8745 into two: one for the 32-bit vector, another for the 64-bit vector. This
8747 required because the host OS must setup the wake much differently for
8749 vector (real vs. protected mode, etc.) and the interface itself should
8752 deciding which vector to use. Also, eliminated the
8753 GetFirmwareWakingVector
8754 interface, as it served no purpose (only the firmware reads the vector,
8756 only writes the vector.) ACPICA BZ 731.
8758 Implemented a mechanism to escape infinite AML While() loops. Added a
8760 counter to force exit from AML While loops if the count becomes too
8762 This can occur in poorly written AML when the hardware does not respond
8763 within a while loop and the loop does not implement a timeout. The
8765 loop count is configurable. A new exception code is returned when a loop
8767 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
8769 Optimized the execution of AML While loops. Previously, a control state
8770 object was allocated and freed for each execution of the loop. The
8771 optimization is to simply reuse the control state for each iteration.
8773 speeds up the raw loop execution time by about 5%.
8775 Enhanced the implicit return mechanism. For Windows compatibility, return
8777 implicit integer of value zero for methods that contain no executable
8779 Such methods are seen in the field as stubs (presumably), and can cause
8780 drivers to fail if they expect a return value. Lin Ming.
8782 Allow multiple backslashes as root prefixes in namepaths. In a fully
8783 qualified namepath, allow multiple backslash prefixes. This can happen
8785 is seen in the field) because of the use of a double-backslash in strings
8786 (since backslash is the escape character) causing confusion. ACPICA BZ
8790 Emit a warning if two different FACS or DSDT tables are discovered in the
8791 FADT. Checks if there are two valid but different addresses for the FACS
8793 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
8795 Consolidated the method argument count validation code. Merged the code
8797 validates control method argument counts into the predefined validation
8798 module. Eliminates possible multiple warnings for incorrect argument
8801 Implemented ACPICA example code. Includes code for ACPICA initialization,
8802 handler installation, and calling a control method. Available at
8803 source/tools/examples.
8805 Added a global pointer for FACS table to simplify internal FACS access.
8807 the global pointer instead of using AcpiGetTableByIndex for each FACS
8809 This simplifies the code for the Global Lock and the Firmware Waking
8812 Example Code and Data Size: These are the sizes for the OS-independent
8813 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8814 debug version of the code includes the debug output trace mechanism and
8816 much larger code and data size.
8819 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8820 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8822 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8823 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8825 2) iASL Compiler/Disassembler and Tools:
8827 iASL: Improved disassembly of external method calls. Added the -e option
8829 allow the inclusion of additional ACPI tables to help with the
8832 method invocations and the generation of external declarations during the
8833 disassembly. Certain external method invocations cannot be disassembled
8834 properly without the actual declaration of the method. Use the -e option
8836 include the table where the external method(s) are actually declared.
8838 useful for disassembling SSDTs that make method calls back to the master
8839 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
8841 -e dsdt.aml ssdt1.aml
8843 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
8844 problem where the use of an alias within a namepath would result in a not
8845 found error or cause the compiler to fault. Also now allows forward
8846 references from the Alias operator itself. ACPICA BZ 738.
8848 ----------------------------------------
8849 26 September 2008. Summary of changes for version 20080926:
8851 1) ACPI CA Core Subsystem:
8853 Designed and implemented a mechanism to validate predefined ACPI methods
8855 objects. This code validates the predefined ACPI objects (objects whose
8857 start with underscore) that appear in the namespace, at the time they are
8858 evaluated. The argument count and the type of the returned object are
8859 validated against the ACPI specification. The purpose of this validation
8861 to detect problems with the BIOS-implemented predefined ACPI objects
8863 the results are returned to the ACPI-related drivers. Future enhancements
8865 include actual repair of incorrect return objects where possible. Two new
8866 files are nspredef.c and acpredef.h.
8868 Fixed a fault in the AML parser if a memory allocation fails during the
8870 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
8872 Fixed an issue with implicit return compatibility. This change improves
8874 implicit return mechanism to be more compatible with the MS interpreter.
8876 Ming, ACPICA BZ 349.
8878 Implemented support for zero-length buffer-to-string conversions. Allow
8880 length strings during interpreter buffer-to-string conversions. For
8882 during the ToDecimalString and ToHexString operators, as well as implicit
8883 conversions. Fiodor Suietov, ACPICA BZ 585.
8885 Fixed two possible memory leaks in the error exit paths of
8886 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
8888 similar in that they use a stack of state objects in order to eliminate
8889 recursion. The stack must be fully unwound and deallocated if an error
8890 occurs. Lin Ming. ACPICA BZ 383.
8892 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
8894 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
8895 Moore ACPICA BZ 442.
8897 Removed the obsolete version number in module headers. Removed the
8898 "$Revision" number that appeared in each module header. This version
8900 was useful under SourceSafe and CVS, but has no meaning under git. It is
8902 only incorrect, it could also be misleading.
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 much larger code and data size.
8911 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8912 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8914 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8915 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8917 ----------------------------------------
8918 29 August 2008. Summary of changes for version 20080829:
8920 1) ACPI CA Core Subsystem:
8922 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
8923 Reference. Changes include the elimination of cheating on the Object
8925 for the DdbHandle subtype, addition of a reference class field to
8926 differentiate the various reference types (instead of an AML opcode), and
8928 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
8930 Reduce an error to a warning for an incorrect method argument count.
8931 Previously aborted with an error if too few arguments were passed to a
8932 control method via the external ACPICA interface. Now issue a warning
8934 and continue. Handles the case where the method inadvertently declares
8936 many arguments, but does not actually use the extra ones. Applies mainly
8938 the predefined methods. Lin Ming. Linux BZ 11032.
8940 Disallow the evaluation of named object types with no intrinsic value.
8942 AE_TYPE for objects that have no value and therefore evaluation is
8944 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
8946 these types were allowed, but an exception would be generated at some
8948 during the evaluation. Now, the error is generated up front.
8950 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
8951 (nsnames.c). Fixes a leak in the error exit path.
8953 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
8955 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
8957 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
8960 Removed obsolete and/or unused exception codes from the acexcep.h header.
8961 There is the possibility that certain device drivers may be affected if
8963 use any of these exceptions.
8965 The ACPICA documentation has been added to the public git source tree,
8967 acpica/documents. Included are the ACPICA programmer reference, the iASL
8968 compiler reference, and the changes.txt release logfile.
8970 Example Code and Data Size: These are the sizes for the OS-independent
8971 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8972 debug version of the code includes the debug output trace mechanism and
8974 much larger code and data size.
8977 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8978 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8980 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8981 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8983 2) iASL Compiler/Disassembler and Tools:
8985 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
8986 defines _SCP with 3 arguments. Previous versions defined it with only 1
8987 argument. iASL now allows both definitions.
8989 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
8991 length subtables when disassembling ACPI tables. Also fixed a couple of
8992 errors where a full 16-bit table type field was not extracted from the
8996 acpisrc: Improve comment counting mechanism for generating source code
8997 statistics. Count first and last lines of multi-line comments as
8999 not comment lines. Handle Linux legal header in addition to standard
9003 ----------------------------------------
9005 29 July 2008. Summary of changes for version 20080729:
9007 1) ACPI CA Core Subsystem:
9009 Fix a possible deadlock in the GPE dispatch. Remove call to
9010 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
9012 to acquire the GPE lock but can deadlock since the GPE lock is already
9014 at dispatch time. This code was introduced in version 20060831 as a
9016 to Linux BZ 6881 and has since been removed from Linux.
9018 Add a function to dereference returned reference objects. Examines the
9020 object from a call to AcpiEvaluateObject. Any Index or RefOf references
9022 automatically dereferenced in an attempt to return something useful
9024 reference types cannot be converted into an external ACPI_OBJECT.)
9026 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
9028 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
9029 subtables for the MADT and one new subtable for the SRAT. Includes
9030 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
9032 Specification, June 2008.
9034 Additional error checking for pathname utilities. Add error check after
9036 calls to AcpiNsGetPathnameLength. Add status return from
9037 AcpiNsBuildExternalPath and check after all calls. Add parameter
9039 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
9041 Return status from the global init function AcpiUtGlobalInitialize. This
9043 used by both the kernel subsystem and the utilities such as iASL
9045 The function could possibly fail when the caches are initialized. Yang
9048 Add a function to decode reference object types to strings. Created for
9049 improved error messages.
9051 Improve object conversion error messages. Better error messages during
9053 conversion from internal to the external ACPI_OBJECT. Used for external
9055 to AcpiEvaluateObject.
9057 Example Code and Data Size: These are the sizes for the OS-independent
9058 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9059 debug version of the code includes the debug output trace mechanism and
9061 much larger code and data size.
9064 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9065 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9067 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9068 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
9070 2) iASL Compiler/Disassembler and Tools:
9072 Debugger: fix a possible hang when evaluating non-methods. Fixes a
9074 introduced in version 20080701. If the object being evaluated (via
9076 command) is not a method, the debugger can hang while trying to obtain
9078 existent parameters.
9080 iASL: relax error for using reserved "_T_x" identifiers. These names can
9081 appear in a disassembled ASL file if they were emitted by the original
9082 compiler. Instead of issuing an error or warning and forcing the user to
9083 manually change these names, issue a remark instead.
9085 iASL: error if named object created in while loop. Emit an error if any
9087 object is created within a While loop. If allowed, this code will
9090 run-time error on the second iteration of the loop when an attempt is
9093 create the same named object twice. ACPICA bugzilla 730.
9095 iASL: Support absolute pathnames for include files. Add support for
9097 pathnames within the Include operator. previously, only relative
9101 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
9103 The ACPI spec requires one interrupt minimum. BZ 423
9105 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
9106 Handles the case for the Interrupt Resource Descriptor where
9107 the ResourceSource argument is omitted but ResourceSourceIndex
9108 is present. Now leave room for the Index. BZ 426
9110 iASL: Prevent error message if CondRefOf target does not exist. Fixes
9112 where an error message is emitted if the target does not exist. BZ 516
9114 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
9115 (get ACPI tables on Windows). This was apparently broken in version
9118 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
9120 the EOF happens immediately after the last table in the input file. Print
9121 completion message. Previously, no message was displayed in this case.
9123 ----------------------------------------
9124 01 July 2008. Summary of changes for version 20080701:
9126 0) Git source tree / acpica.org
9128 Fixed a problem where a git-clone from http would not transfer the entire
9131 1) ACPI CA Core Subsystem:
9133 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
9134 enable bit. Now performs a read-change-write of the enable register
9136 of simply writing out the cached enable mask. This will prevent
9138 enabling of GPEs if a rogue GPE is received during initialization (before
9140 handlers are installed.)
9142 Implemented a copy for dynamically loaded tables. Previously, dynamically
9143 loaded tables were simply mapped - but on some machines this memory is
9144 corrupted after suspend. Now copy the table to a local buffer. For the
9145 OpRegion case, added checksum verify. Use the table length from the table
9146 header, not the region length. For the Buffer case, use the table length
9147 also. Dennis Noordsij, Bob Moore. BZ 10734
9149 Fixed a problem where the same ACPI table could not be dynamically loaded
9151 unloaded more than once. Without this change, a table cannot be loaded
9153 once it has been loaded/unloaded one time. The current mechanism does not
9154 unregister a table upon an unload. During a load, if the same table is
9156 this no longer returns an exception. BZ 722
9158 Fixed a problem where the wrong descriptor length was calculated for the
9159 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
9161 are calculated as 12 bytes long, but the actual length in the internal
9162 descriptor is 16 because of the round-up to 8 on the 64-bit build.
9164 by Linn Crosetto. BZ 728
9166 Fixed a possible memory leak in the Unload operator. The DdbHandle
9168 by Load() did not have its reference count decremented during unload,
9170 to a memory leak. Lin Ming. BZ 727
9172 Fixed a possible memory leak when deleting thermal/processor objects. Any
9173 associated notify handlers (and objects) were not being deleted. Fiodor
9176 Fixed the ordering of the ASCII names in the global mutex table to match
9178 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
9180 Vegard Nossum. BZ 726
9182 Enhanced the AcpiGetObjectInfo interface to return the number of required
9183 arguments if the object is a control method. Added this call to the
9185 so the proper number of default arguments are passed to a method. This
9186 prevents a warning when executing methods from AcpiExec.
9188 Added a check for an invalid handle in AcpiGetObjectInfo. Return
9189 AE_BAD_PARAMETER if input handle is invalid. BZ 474
9191 Fixed an extraneous warning from exconfig.c on the 64-bit build.
9193 Example Code and Data Size: These are the sizes for the OS-independent
9194 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9195 debug version of the code includes the debug output trace mechanism and
9197 much larger code and data size.
9200 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9201 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9203 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9204 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9206 2) iASL Compiler/Disassembler and Tools:
9208 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
9209 resource descriptor names.
9211 iASL: Detect invalid ASCII characters in input (windows version). Removed
9213 "-CF" flag from the flex compile, enables correct detection of non-ASCII
9214 characters in the input. BZ 441
9216 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
9218 "result of operation not used" warning when the DDB handle returned from
9219 LoadTable is not used. The warning is not needed. BZ 590
9221 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
9224 pass address of table to the AML. Added option to disable OpRegion
9226 to allow creation of an OpRegion with a real address that was passed to
9228 All of this allows testing of the Load and Unload operators from
9231 Debugger: update tables command for unloaded tables. Handle unloaded
9233 and use the standard table header output routine.
9235 ----------------------------------------
9236 09 June 2008. Summary of changes for version 20080609:
9238 1) ACPI CA Core Subsystem:
9240 Implemented a workaround for reversed _PRT entries. A significant number
9242 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
9243 change dynamically detects and repairs this problem. Provides
9245 with MS ACPI. BZ 6859
9247 Simplified the internal ACPI hardware interfaces to eliminate the locking
9248 flag parameter from Register Read/Write. Added a new external interface,
9249 AcpiGetRegisterUnlocked.
9251 Fixed a problem where the invocation of a GPE control method could hang.
9253 was a regression introduced in 20080514. The new method argument count
9254 validation mechanism can enter an infinite loop when a GPE method is
9255 dispatched. Problem fixed by removing the obsolete code that passed GPE
9257 information to the notify handler via the control method parameter
9260 Fixed a problem where the _SST execution status was incorrectly returned
9262 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
9264 20080514. _SST is optional and a NOT_FOUND exception should never be
9267 Fixed a problem where a deleted object could be accessed from within the
9269 parser. This was a regression introduced in version 20080123 as a fix for
9271 Unload operator. Lin Ming. BZ 10669
9273 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
9275 and eliminated the use of a negative index in a loop. Operands are now
9276 displayed in the correct order, not backwards. This also fixes a
9278 introduced in 20080514 on 64-bit systems where the elimination of
9279 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
9282 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
9284 path did not delete a locally allocated structure.
9286 Updated definitions for the DMAR and SRAT tables to synchronize with the
9287 current specifications. Includes disassembler support.
9289 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
9290 loop termination value was used. Loop terminated on iteration early,
9292 one mutex. Linn Crosetto
9294 Example Code and Data Size: These are the sizes for the OS-independent
9295 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9296 debug version of the code includes the debug output trace mechanism and
9298 much larger code and data size.
9301 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9302 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9304 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9305 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9307 2) iASL Compiler/Disassembler and Tools:
9309 Disassembler: Implemented support for EisaId() within _CID objects. Now
9310 disassemble integer _CID objects back to EisaId invocations, including
9311 multiple integers within _CID packages. Includes single-step support for
9314 Disassembler: Added support for DMAR and SRAT table definition changes.
9316 ----------------------------------------
9317 14 May 2008. Summary of changes for version 20080514:
9319 1) ACPI CA Core Subsystem:
9321 Fixed a problem where GPEs were enabled too early during the ACPICA
9322 initialization. This could lead to "handler not installed" errors on some
9323 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
9325 ensures that all operation regions and devices throughout the namespace
9327 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
9329 Implemented a change to the enter sleep code. Moved execution of the _GTS
9330 method to just before setting sleep enable bit. The execution was moved
9332 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
9333 immediately before the SLP_EN bit is set, as per the ACPI specification.
9336 Implemented a fix to disable unknown GPEs (2nd version). Now always
9338 the GPE, even if ACPICA thinks that that it is already disabled. It is
9339 possible that the AML or some other code has enabled the GPE unbeknownst
9343 Fixed a problem with the Field operator where zero-length fields would
9345 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
9347 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
9349 Implemented a fix for the Load operator, now load the table at the
9351 root. This reverts a change introduced in version 20071019. The table is
9353 loaded at the namespace root even though this goes against the ACPI
9354 specification. This provides compatibility with other ACPI
9356 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
9359 Fixed a problem where ACPICA would not Load() tables with unusual
9361 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
9362 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
9363 Therefore, signature validation is worthless. Apparently MS ACPI accepts
9365 signatures, ACPICA must be compatible. BZ 10454.
9367 Fixed a possible negative array index in AcpiUtValidateException. Added
9369 fields to the exception string arrays to eliminate a -1 subtraction on
9373 Updated the debug tracking macros to reduce overall code and data size.
9374 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
9375 instead of pointers to static strings. Jan Beulich and Bob Moore.
9377 Implemented argument count checking in control method invocation via
9378 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
9380 many. This applies only to extern programmatic control method execution,
9382 method-to-method calls within the AML. Lin Ming.
9384 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
9386 longer needed, especially with the removal of 16-bit support. It was
9388 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
9391 32/64-bit platforms is required.
9393 Added the C const qualifier for appropriate string constants -- mostly
9394 MODULE_NAME and printf format strings. Jan Beulich.
9396 Example Code and Data Size: These are the sizes for the OS-independent
9397 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9398 debug version of the code includes the debug output trace mechanism and
9400 much larger code and data size.
9403 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9404 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9406 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9407 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9409 2) iASL Compiler/Disassembler and Tools:
9411 Implemented ACPI table revision ID validation in the disassembler. Zero
9413 always invalid. For DSDTs, the ID controls the interpreter integer width.
9415 means 32-bit and this is unusual. 2 or greater is 64-bit.
9417 ----------------------------------------
9418 21 March 2008. Summary of changes for version 20080321:
9420 1) ACPI CA Core Subsystem:
9422 Implemented an additional change to the GPE support in order to suppress
9423 spurious or stray GPEs. The AcpiEvDisableGpe function will now
9425 disable incoming GPEs that are neither enabled nor disabled -- meaning
9427 the GPE is unknown to the system. This should prevent future interrupt
9429 from that GPE. BZ 6217 (Zhang Rui)
9431 Fixed a problem where NULL package elements were not returned to the
9432 AcpiEvaluateObject interface correctly. The element was simply ignored
9433 instead of returning a NULL ACPI_OBJECT package element, potentially
9435 a buffer overflow and/or confusing the caller who expected a fixed number
9437 elements. BZ 10132 (Lin Ming, Bob Moore)
9439 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
9441 Qword), Field, BankField, and IndexField operators when invoked from
9443 an executing control method. In this case, these operators created
9445 nodes that were incorrectly left marked as permanent nodes instead of
9446 temporary nodes. This could cause a problem if there is race condition
9447 between an exiting control method and a running namespace walk. (Reported
9451 Fixed a problem where the CreateField and CreateXXXField operators would
9452 incorrectly allow duplicate names (the name of the field) with no
9456 Implemented several changes for Notify handling. Added support for new
9458 values (ACPI 2.0+) and improved the Notify debug output. Notify on
9459 PowerResource objects is no longer allowed, as per the ACPI
9461 (Bob Moore, Zhang Rui)
9463 All Reference Objects returned via the AcpiEvaluateObject interface are
9465 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
9467 NULL objects - either NULL package elements or unresolved named
9470 Fixed a problem where an extraneous debug message was produced for
9472 objects (when debugging enabled). The message "Package List length larger
9473 than NumElements count" is now produced in the correct case, and is now
9475 error message rather than a debug message. Added a debug message for the
9476 opposite case, where NumElements is larger than the Package List (the
9478 will be padded out with NULL elements as per the ACPI spec.)
9480 Implemented several improvements for the output of the ASL "Debug" object
9482 clarify and keep all data for a given object on one output line.
9484 Fixed two size calculation issues with the variable-length Start
9486 resource descriptor.
9488 Example Code and Data Size: These are the sizes for the OS-independent
9489 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9490 debug version of the code includes the debug output trace mechanism and
9492 a much larger code and data size.
9495 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9496 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9498 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9499 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9501 2) iASL Compiler/Disassembler and Tools:
9503 Fixed a problem with the use of the Switch operator where execution of
9505 containing method by multiple concurrent threads could cause an
9506 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
9507 actual Switch opcode, it must be simulated with local named temporary
9508 variables and if/else pairs. The solution chosen was to mark any method
9510 uses Switch as Serialized, thus preventing multiple thread entries. BZ
9513 ----------------------------------------
9514 13 February 2008. Summary of changes for version 20080213:
9516 1) ACPI CA Core Subsystem:
9518 Implemented another MS compatibility design change for GPE/Notify
9520 GPEs are now cleared/enabled asynchronously to allow all pending notifies
9522 complete first. It is expected that the OSL will queue the enable request
9523 behind all pending notify requests (may require changes to the local host
9525 in AcpiOsExecute). Alexey Starikovskiy.
9527 Fixed a problem where buffer and package objects passed as arguments to a
9528 control method via the external AcpiEvaluateObject interface could cause
9530 AE_AML_INTERNAL exception depending on the order and type of operators
9531 executed by the target control method.
9533 Fixed a problem where resource descriptor size optimization could cause a
9534 problem when a _CRS resource template is passed to a _SRS method. The
9536 resource template must use the same descriptors (with the same size) as
9537 returned from _CRS. This change affects the following resource
9539 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
9542 Fixed a problem where a CopyObject to RegionField, BankField, and
9544 objects did not perform an implicit conversion as it should. These types
9546 retain their initial type permanently as per the ACPI specification.
9548 a CopyObject to all other object types should not perform an implicit
9549 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
9551 Fixed a problem with the AcpiGetDevices interface where the mechanism to
9552 match device CIDs did not examine the entire list of available CIDs, but
9553 instead aborted on the first non-matching CID. Andrew Patterson.
9555 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
9557 inadvertently changed to return a 16-bit value instead of a 32-bit value,
9558 truncating the upper dword of a 64-bit value. This macro is only used to
9559 display debug output, so no incorrect calculations were made. Also,
9560 reimplemented the macro so that a 64-bit shift is not performed by
9561 inefficient compilers.
9563 Added missing va_end statements that should correspond with each va_start
9566 Example Code and Data Size: These are the sizes for the OS-independent
9567 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9568 debug version of the code includes the debug output trace mechanism and
9570 a much larger code and data size.
9573 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9574 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9576 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9577 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9579 2) iASL Compiler/Disassembler and Tools:
9581 Implemented full disassembler support for the following new ACPI tables:
9582 BERT, EINJ, and ERST. Implemented partial disassembler support for the
9583 complicated HEST table. These tables support the Windows Hardware Error
9584 Architecture (WHEA).
9586 ----------------------------------------
9587 23 January 2008. Summary of changes for version 20080123:
9589 1) ACPI CA Core Subsystem:
9591 Added the 2008 copyright to all module headers and signons. This affects
9592 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9593 the tools/utilities.
9595 Fixed a problem with the SizeOf operator when used with Package and
9597 objects. These objects have deferred execution for some arguments, and
9599 execution is now completed before the SizeOf is executed. This problem
9601 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
9605 Implemented an enhancement to the interpreter "slack mode". In the
9608 an explicit return or an implicitly returned object from the last
9610 opcode, a control method will now implicitly return an integer of value 0
9612 Microsoft compatibility. (Lin Ming) BZ 392
9614 Fixed a problem with the Load operator where an exception was not
9617 the case where the table is already loaded. (Lin Ming) BZ 463
9619 Implemented support for the use of DDBHandles as an Indexed Reference, as
9621 the ACPI spec. (Lin Ming) BZ 486
9623 Implemented support for UserTerm (Method invocation) for the Unload
9625 as per the ACPI spec. (Lin Ming) BZ 580
9627 Fixed a problem with the LoadTable operator where the OemId and
9629 input strings could cause unexpected failures if they were shorter than
9631 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
9633 Implemented support for UserTerm (Method invocation) for the Unload
9635 as per the ACPI spec. (Lin Ming) BZ 580
9637 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
9639 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
9641 Example Code and Data Size: These are the sizes for the OS-independent
9642 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9643 debug version of the code includes the debug output trace mechanism and
9645 a much larger code and data size.
9648 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9649 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9651 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9652 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9654 2) iASL Compiler/Disassembler and Tools:
9656 Implemented support in the disassembler for checksum validation on
9658 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
9660 header dump at the start of the disassembly.
9662 Implemented additional debugging information in the namespace listing
9664 created during compilation. In addition to the namespace hierarchy, the
9666 pathname to each namespace object is displayed.
9668 Fixed a problem with the disassembler where invalid ACPI tables could
9670 faults or infinite loops.
9672 Fixed an unexpected parse error when using the optional "parameter types"
9673 list in a control method declaration. (Lin Ming) BZ 397
9675 Fixed a problem where two External declarations with the same name did
9677 cause an error (Lin Ming) BZ 509
9679 Implemented support for full TermArgs (adding Argx, Localx and method
9680 invocation) for the ParameterData parameter to the LoadTable operator.
9684 ----------------------------------------
9685 19 December 2007. Summary of changes for version 20071219:
9687 1) ACPI CA Core Subsystem:
9689 Implemented full support for deferred execution for the TermArg string
9690 arguments for DataTableRegion. This enables forward references and full
9691 operand resolution for the three string arguments. Similar to
9693 deferred argument execution.) Lin Ming. BZ 430
9695 Implemented full argument resolution support for the BankValue argument
9697 BankField. Previously, only constants were supported, now any TermArg may
9699 used. Lin Ming BZ 387, 393
9701 Fixed a problem with AcpiGetDevices where the search of a branch of the
9702 device tree could be terminated prematurely. In accordance with the ACPI
9703 specification, the search down the current branch is terminated if a
9705 is both not present and not functional (instead of just not present.)
9709 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
9711 the underlying AML code changed the GPE enable registers. Now, any
9713 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
9715 instead of simply ignored. Rui Zhang.
9717 Fixed a problem with Index Fields where the Index register was
9719 limited to a maximum of 32 bits. Now any size may be used.
9721 Fixed a couple memory leaks associated with "implicit return" objects
9723 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
9725 Example Code and Data Size: These are the sizes for the OS-independent
9726 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9727 debug version of the code includes the debug output trace mechanism and
9729 a much larger code and data size.
9732 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9733 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9735 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9736 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9738 ----------------------------------------
9739 14 November 2007. Summary of changes for version 20071114:
9741 1) ACPI CA Core Subsystem:
9743 Implemented event counters for each of the Fixed Events, the ACPI SCI
9744 (interrupt) itself, and control methods executed. Named
9745 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
9747 should be useful for debugging and statistics.
9749 Implemented a new external interface, AcpiGetStatistics, to retrieve the
9750 contents of the various event counters. Returns the current values for
9751 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
9752 AcpiMethodCount. The interface can be expanded in the future if new
9754 are added. Device drivers should use this interface rather than access
9758 Fixed a problem with the FromBCD and ToBCD operators. With some
9760 the ShortDivide function worked incorrectly, causing problems with the
9762 functions with large input values. A truncation from 64-bit to 32-bit
9763 inadvertently occurred. Internal BZ 435. Lin Ming
9765 Fixed a problem with Index references passed as method arguments.
9767 passed as arguments to control methods were dereferenced immediately
9769 control was passed to the called method). The references are now
9771 passed directly to the called method. BZ 5389. Lin Ming
9773 Fixed a problem with CopyObject used in conjunction with the Index
9775 The reference was incorrectly dereferenced before the copy. The reference
9777 now correctly copied. BZ 5391. Lin Ming
9779 Fixed a problem with Control Method references within Package objects.
9781 references are now correctly generated. This completes the package
9782 construction overhaul that began in version 20071019.
9784 Example Code and Data Size: These are the sizes for the OS-independent
9785 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9786 debug version of the code includes the debug output trace mechanism and
9788 a much larger code and data size.
9791 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9792 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9794 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9795 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9798 2) iASL Compiler/Disassembler and Tools:
9800 The AcpiExec utility now installs handlers for all of the predefined
9801 Operation Region types. New types supported are: PCI_Config, CMOS, and
9804 Fixed a problem with the 64-bit version of AcpiExec where the extended
9806 bit) address fields for the DSDT and FACS within the FADT were not being
9807 used, causing truncation of the upper 32-bits of these addresses. Lin
9811 ----------------------------------------
9812 19 October 2007. Summary of changes for version 20071019:
9814 1) ACPI CA Core Subsystem:
9816 Fixed a problem with the Alias operator when the target of the alias is a
9817 named ASL operator that opens a new scope -- Scope, Device,
9819 Processor, and ThermalZone. In these cases, any children of the original
9820 operator could not be accessed via the alias, potentially causing
9822 AE_NOT_FOUND exceptions. (BZ 9067)
9824 Fixed a problem with the Package operator where all named references were
9825 created as object references and left otherwise unresolved. According to
9827 ACPI specification, a Package can only contain Data Objects or references
9829 control methods. The implication is that named references to Data Objects
9830 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
9831 immediately upon package creation. This is the approach taken with this
9832 change. References to all other named objects (Methods, Devices, Scopes,
9833 etc.) are all now properly created as reference objects. (BZ 5328)
9835 Reverted a change to Notify handling that was introduced in version
9836 20070508. This version changed the Notify handling from asynchronous to
9837 fully synchronous (Device driver Notify handling with respect to the
9839 ASL operator). It was found that this change caused more problems than it
9840 solved and was removed by most users.
9842 Fixed a problem with the Increment and Decrement operators where the type
9844 the target object could be unexpectedly and incorrectly changed. (BZ 353)
9847 Fixed a problem with the Load and LoadTable operators where the table
9848 location within the namespace was ignored. Instead, the table was always
9849 loaded into the root or current scope. Lin Ming.
9851 Fixed a problem with the Load operator when loading a table from a buffer
9852 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
9854 Fixed a problem with the Debug object where a store of a DdbHandle
9856 object to the Debug object could cause a fault.
9858 Added a table checksum verification for the Load operator, in the case
9860 the load is from a buffer. (BZ 578).
9862 Implemented additional parameter validation for the LoadTable operator.
9864 length of the input strings SignatureString, OemIdString, and OemTableId
9866 now checked for maximum lengths. (BZ 582) Lin Ming.
9868 Example Code and Data Size: These are the sizes for the OS-independent
9869 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9870 debug version of the code includes the debug output trace mechanism and
9872 a much larger code and data size.
9875 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9876 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9878 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9879 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9882 2) iASL Compiler/Disassembler:
9884 Fixed a problem where if a single file was specified and the file did not
9885 exist, no error message was emitted. (Introduced with wildcard support in
9888 ----------------------------------------
9889 19 September 2007. Summary of changes for version 20070919:
9891 1) ACPI CA Core Subsystem:
9893 Designed and implemented new external interfaces to install and remove
9894 handlers for ACPI table-related events. Current events that are defined
9896 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
9897 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
9898 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
9900 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
9901 (acpi_serialized option on Linux) could cause some systems to hang during
9902 initialization. (Bob Moore) BZ 8171
9904 Fixed a problem where objects of certain types (Device, ThermalZone,
9905 Processor, PowerResource) can be not found if they are declared and
9906 referenced from within the same control method (Lin Ming) BZ 341
9908 Example Code and Data Size: These are the sizes for the OS-independent
9909 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9910 debug version of the code includes the debug output trace mechanism and
9912 a much larger code and data size.
9915 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9916 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9918 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9919 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9922 2) iASL Compiler/Disassembler:
9924 Implemented support to allow multiple files to be compiled/disassembled
9927 single invocation. This includes command line wildcard support for both
9929 Windows and Unix versions of the compiler. This feature simplifies the
9930 disassembly and compilation of multiple ACPI tables in a single
9933 ----------------------------------------
9934 08 May 2007. Summary of changes for version 20070508:
9936 1) ACPI CA Core Subsystem:
9938 Implemented a Microsoft compatibility design change for the handling of
9940 Notify AML operator. Previously, notify handlers were dispatched and
9941 executed completely asynchronously in a deferred thread. The new design
9942 still executes the notify handlers in a different thread, but the
9944 thread that executed the Notify() now waits at a synchronization point
9946 the notify handler to complete. Some machines depend on a synchronous
9948 operator in order to operate correctly.
9950 Implemented support to allow Package objects to be passed as method
9951 arguments to the external AcpiEvaluateObject interface. Previously, this
9952 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
9953 implemented since there were no reserved control methods that required it
9956 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
9958 contained invalid non-zero values in reserved fields could cause later
9959 failures because these fields have meaning in later revisions of the
9961 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
9963 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
9965 Fixed a problem where the Global Lock handle was not properly updated if
9967 thread that acquired the Global Lock via executing AML code then
9969 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
9973 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
9974 could be corrupted if the interrupt being removed was at the head of the
9975 list. Reported by Linn Crosetto.
9977 Example Code and Data Size: These are the sizes for the OS-independent
9978 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9979 debug version of the code includes the debug output trace mechanism and
9981 a much larger code and data size.
9984 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9985 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9987 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9988 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9990 ----------------------------------------
9991 20 March 2007. Summary of changes for version 20070320:
9993 1) ACPI CA Core Subsystem:
9995 Implemented a change to the order of interpretation and evaluation of AML
9996 operand objects within the AML interpreter. The interpreter now evaluates
9997 operands in the order that they appear in the AML stream (and the
9998 corresponding ASL code), instead of in the reverse order (after the
10000 operand list has been parsed). The previous behavior caused several
10002 incompatibilities with the Microsoft AML interpreter as well as being
10003 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
10005 Implemented a change to the ACPI Global Lock support. All interfaces to
10007 global lock now allow the same thread to acquire the lock multiple times.
10008 This affects the AcpiAcquireGlobalLock external interface to the global
10010 as well as the internal use of the global lock to support AML fields -- a
10011 control method that is holding the global lock can now simultaneously
10013 AML fields that require global lock protection. Previously, in both
10015 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
10017 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
10018 Controller. There is no change to the behavior of the AML Acquire
10020 as this can already be used to acquire a mutex multiple times by the same
10021 thread. BZ 8066. With assistance from Alexey Starikovskiy.
10023 Fixed a problem where invalid objects could be referenced in the AML
10024 Interpreter after error conditions. During operand evaluation, ensure
10026 the internal "Return Object" field is cleared on error and only valid
10027 pointers are stored there. Caused occasional access to deleted objects
10029 resulted in "large reference count" warning messages. Valery Podrezov.
10031 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
10033 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
10036 Fixed an internal problem with the handling of result objects on the
10037 interpreter result stack. BZ 7872. Valery Podrezov.
10039 Removed obsolete code that handled the case where AML_NAME_OP is the
10041 of a reference (Reference.Opcode). This code was no longer necessary. BZ
10042 7874. Valery Podrezov.
10044 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
10047 remnant from the previously discontinued 16-bit support.
10049 Example Code and Data Size: These are the sizes for the OS-independent
10050 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10051 debug version of the code includes the debug output trace mechanism and
10053 a much larger code and data size.
10056 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10057 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10059 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10060 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
10062 ----------------------------------------
10063 26 January 2007. Summary of changes for version 20070126:
10065 1) ACPI CA Core Subsystem:
10067 Added the 2007 copyright to all module headers and signons. This affects
10068 virtually every file in the ACPICA core subsystem, the iASL compiler, and
10071 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
10072 during a table load. A bad pointer was passed in the case where the DSDT
10074 overridden, causing a fault in this case.
10076 Example Code and Data Size: These are the sizes for the OS-independent
10077 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10078 debug version of the code includes the debug output trace mechanism and
10080 a much larger code and data size.
10083 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10084 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10086 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10087 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10089 ----------------------------------------
10090 15 December 2006. Summary of changes for version 20061215:
10092 1) ACPI CA Core Subsystem:
10094 Support for 16-bit ACPICA has been completely removed since it is no
10096 necessary and it clutters the code. All 16-bit macros, types, and
10097 conditional compiles have been removed, cleaning up and simplifying the
10099 across the entire subsystem. DOS support is no longer needed since the
10100 bootable Linux firmware kit is now available.
10102 The handler for the Global Lock is now removed during AcpiTerminate to
10103 enable a clean subsystem restart, via the implementation of the
10104 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
10107 Implemented enhancements to the multithreading support within the
10109 to enable improved multithreading debugging and evaluation of the
10113 Debugger: Enhanced the Statistics/Memory command to emit the total
10115 memory used during the execution, as well as the maximum memory consumed
10117 each of the various object types. (Valery Podrezov)
10119 Example Code and Data Size: These are the sizes for the OS-independent
10120 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10121 debug version of the code includes the debug output trace mechanism and
10123 a much larger code and data size.
10126 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10127 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10129 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10130 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10133 2) iASL Compiler/Disassembler and Tools:
10135 AcpiExec: Implemented a new option (-m) to display full memory use
10136 statistics upon subsystem/program termination. (Valery Podrezov)
10138 ----------------------------------------
10139 09 November 2006. Summary of changes for version 20061109:
10141 1) ACPI CA Core Subsystem:
10143 Optimized the Load ASL operator in the case where the source operand is
10145 operation region. Simply map the operation region memory, instead of
10146 performing a bytewise read. (Region must be of type SystemMemory, see
10149 Fixed the Load ASL operator for the case where the source operand is a
10150 region field. A buffer object is also allowed as the source operand. BZ
10153 Fixed a problem where the Load ASL operator allowed the source operand to
10155 an operation region of any type. It is now restricted to regions of type
10156 SystemMemory, as per the ACPI specification. BZ 481
10158 Additional cleanup and optimizations for the new Table Manager code.
10160 AcpiEnable will now fail if all of the required ACPI tables are not
10162 (FADT, FACS, DSDT). BZ 477
10164 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
10166 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
10167 manually optimized to be aligned and will not work if it is byte-packed.
10169 Example Code and Data Size: These are the sizes for the OS-independent
10170 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10171 debug version of the code includes the debug output trace mechanism and
10173 a much larger code and data size.
10176 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10177 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10179 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10180 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10183 2) iASL Compiler/Disassembler and Tools:
10185 Fixed a problem where the presence of the _OSI predefined control method
10186 within complex expressions could cause an internal compiler error.
10188 AcpiExec: Implemented full region support for multiple address spaces.
10189 SpaceId is now part of the REGION object. BZ 429
10191 ----------------------------------------
10192 11 October 2006. Summary of changes for version 20061011:
10194 1) ACPI CA Core Subsystem:
10196 Completed an AML interpreter performance enhancement for control method
10197 execution. Previously a 2-pass parse/execution, control methods are now
10198 completely parsed and executed in a single pass. This improves overall
10199 interpreter performance by ~25%, reduces code size, and reduces CPU stack
10200 use. (Valery Podrezov + interpreter changes in version 20051202 that
10201 eliminated namespace loading during the pass one parse.)
10203 Implemented _CID support for PCI Root Bridge detection. If the _HID does
10205 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
10207 obtained and also checked for an ID match.
10209 Implemented additional support for the PCI _ADR execution: upsearch until
10211 device scope is found before executing _ADR. This allows PCI_Config
10212 operation regions to be declared locally within control methods
10214 PCI device objects.
10216 Fixed a problem with a possible race condition between threads executing
10217 AcpiWalkNamespace and the AML interpreter. This condition was removed by
10218 modifying AcpiWalkNamespace to (by default) ignore all temporary
10220 entries created during any concurrent control method execution. An
10221 additional namespace race condition is known to exist between
10222 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
10225 Restructured the AML ParseLoop function, breaking it into several
10226 subfunctions in order to reduce CPU stack use and improve
10230 AcpiGetHandle: Fix for parameter validation to detect invalid
10232 of prefix handle and pathname. BZ 478
10234 Example Code and Data Size: These are the sizes for the OS-independent
10235 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10236 debug version of the code includes the debug output trace mechanism and
10238 a much larger code and data size.
10241 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10242 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10244 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10245 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10247 2) iASL Compiler/Disassembler and Tools:
10249 Ported the -g option (get local ACPI tables) to the new ACPICA Table
10251 to restore original behavior.
10253 ----------------------------------------
10254 27 September 2006. Summary of changes for version 20060927:
10256 1) ACPI CA Core Subsystem:
10258 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
10259 These functions now use a spinlock for mutual exclusion and the interrupt
10260 level indication flag is not needed.
10262 Fixed a problem with the Global Lock where the lock could appear to be
10263 obtained before it is actually obtained. The global lock semaphore was
10264 inadvertently created with one unit instead of zero units. (BZ 464)
10268 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
10270 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
10272 Example Code and Data Size: These are the sizes for the OS-independent
10273 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10274 debug version of the code includes the debug output trace mechanism and
10276 a much larger code and data size.
10279 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10280 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10282 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10283 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10286 2) iASL Compiler/Disassembler and Tools:
10288 Fixed a compilation problem with the pre-defined Resource Descriptor
10290 names where an "object does not exist" error could be incorrectly
10292 if the parent ResourceTemplate pathname places the template within a
10293 different namespace scope than the current scope. (BZ 7212)
10295 Fixed a problem where the compiler could hang after syntax errors
10297 in an ElseIf construct. (BZ 453)
10299 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
10300 operator. An incorrect output filename was produced when this parameter
10302 a null string (""). Now, the original input filename is used as the AML
10303 output filename, with an ".aml" extension.
10305 Implemented a generic batch command mode for the AcpiExec utility
10307 any AML debugger command) (Valery Podrezov).
10309 ----------------------------------------
10310 12 September 2006. Summary of changes for version 20060912:
10312 1) ACPI CA Core Subsystem:
10314 Enhanced the implementation of the "serialized mode" of the interpreter
10315 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
10316 specified, instead of creating a serialization semaphore per control
10318 the interpreter lock is simply no longer released before a blocking
10319 operation during control method execution. This effectively makes the AML
10320 Interpreter single-threaded. The overhead of a semaphore per-method is
10323 Fixed a regression where an error was no longer emitted if a control
10325 attempts to create 2 objects of the same name. This once again returns
10326 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
10328 will dynamically serialize the control method to possible prevent future
10331 Integrated a fix for a problem with PCI Express HID detection in the PCI
10332 Config Space setup procedure. (BZ 7145)
10334 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
10335 AcpiHwInitialize function - the FADT registers are now validated when the
10338 Added two new warnings during FADT verification - 1) if the FADT is
10340 than the largest known FADT version, and 2) if there is a mismatch
10343 32-bit block address and the 64-bit X counterpart (when both are non-
10346 Example Code and Data Size: These are the sizes for the OS-independent
10347 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10348 debug version of the code includes the debug output trace mechanism and
10350 a much larger code and data size.
10353 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10354 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10356 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10357 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10360 2) iASL Compiler/Disassembler and Tools:
10362 Fixed a problem with the implementation of the Switch() operator where
10364 temporary variable was declared too close to the actual Switch, instead
10366 at method level. This could cause a problem if the Switch() operator is
10367 within a while loop, causing an error on the second iteration. (BZ 460)
10369 Disassembler - fix for error emitted for unknown type for target of scope
10370 operator. Now, ignore it and continue.
10372 Disassembly of an FADT now verifies the input FADT and reports any errors
10373 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
10375 Disassembly of raw data buffers with byte initialization data now
10377 each output line with the current buffer offset.
10379 Disassembly of ASF! table now includes all variable-length data fields at
10380 the end of some of the subtables.
10382 The disassembler now emits a comment if a buffer appears to be a
10383 ResourceTemplate, but cannot be disassembled as such because the EndTag
10385 not appear at the very end of the buffer.
10387 AcpiExec - Added the "-t" command line option to enable the serialized
10389 of the AML interpreter.
10391 ----------------------------------------
10392 31 August 2006. Summary of changes for version 20060831:
10394 1) ACPI CA Core Subsystem:
10396 Miscellaneous fixes for the Table Manager:
10397 - Correctly initialize internal common FADT for all 64-bit "X" fields
10398 - Fixed a couple table mapping issues during table load
10399 - Fixed a couple alignment issues for IA64
10400 - Initialize input array to zero in AcpiInitializeTables
10401 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
10402 AcpiGetTableByIndex
10404 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
10406 immediately disabled to prevent the waking GPE from firing again and to
10407 prevent other wake GPEs from interrupting the wake process.
10409 Added the AcpiGpeCount global that tracks the number of processed GPEs,
10411 be used for debugging systems with a large number of ACPI interrupts.
10413 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
10414 both the ACPICA headers and the disassembler.
10416 Example Code and Data Size: These are the sizes for the OS-independent
10417 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10418 debug version of the code includes the debug output trace mechanism and
10420 a much larger code and data size.
10423 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10424 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10426 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10427 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10430 2) iASL Compiler/Disassembler and Tools:
10432 Disassembler support for the DMAR ACPI table.
10434 ----------------------------------------
10435 23 August 2006. Summary of changes for version 20060823:
10437 1) ACPI CA Core Subsystem:
10439 The Table Manager component has been completely redesigned and
10440 reimplemented. The new design is much simpler, and reduces the overall
10442 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
10444 now possible to obtain the ACPI tables very early during kernel
10445 initialization, even before dynamic memory management is initialized.
10446 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
10448 Obsolete ACPICA interfaces:
10450 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
10453 - AcpiLoadTable: Not needed.
10454 - AcpiUnloadTable: Not needed.
10456 New ACPICA interfaces:
10458 - AcpiInitializeTables: Must be called before the table manager can be
10460 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
10461 allocated memory after it becomes available.
10462 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
10466 Other ACPICA changes:
10468 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
10470 AcpiOsUnmapMemory to free this mapping.
10471 - AcpiGetTable returns the actual mapped table. The mapping is managed
10472 internally and must not be deleted by the caller. Use of this interface
10473 causes no additional dynamic memory allocation.
10474 - AcpiFindRootPointer: Support for physical addressing has been
10476 it appeared to be unused.
10477 - The interface to AcpiOsMapMemory has changed to be consistent with the
10478 other allocation interfaces.
10479 - The interface to AcpiOsGetRootPointer has changed to eliminate
10482 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
10484 bit platforms. Was previously 64 bits on all platforms.
10485 - The interface to the ACPI Global Lock acquire/release macros have
10487 slightly since ACPICA no longer keeps a local copy of the FACS with a
10488 constructed pointer to the actual global lock.
10490 Porting to the new table manager:
10492 - AcpiInitializeTables: Must be called once, and can be called anytime
10493 during the OS initialization process. It allows the host to specify an
10495 of memory to be used to store the internal version of the RSDT/XSDT (root
10496 table). This allows the host to access ACPI tables before memory
10498 is initialized and running.
10499 - AcpiReallocateRootTable: Can be called after memory management is
10501 to copy the root table to a dynamically allocated array, freeing up the
10502 scratch memory specified in the call to AcpiInitializeTables.
10503 - AcpiSubsystemInitialize: This existing interface is independent of the
10504 Table Manager, and does not have to be called before the Table Manager
10506 be used, it only must be called before the rest of ACPICA can be used.
10507 - ACPI Tables: Some changes have been made to the names and structure of
10509 actbl.h and actbl1.h header files and may require changes to existing
10511 For example, bitfields have been completely removed because of their lack
10513 portability across C compilers.
10514 - Update interfaces to the Global Lock acquire/release macros if local
10515 versions are used. (see acwin.h)
10517 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
10519 New files: tbfind.c
10521 Example Code and Data Size: These are the sizes for the OS-independent
10522 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10523 debug version of the code includes the debug output trace mechanism and
10525 a much larger code and data size.
10528 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10529 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10531 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10532 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10535 2) iASL Compiler/Disassembler and Tools:
10537 No changes for this release.
10539 ----------------------------------------
10540 21 July 2006. Summary of changes for version 20060721:
10542 1) ACPI CA Core Subsystem:
10544 The full source code for the ASL test suite used to validate the iASL
10545 compiler and the ACPICA core subsystem is being released with the ACPICA
10546 source for the first time. The source is contained in a separate package
10548 consists of over 1100 files that exercise all ASL/AML operators. The
10550 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
10554 Completed a new design and implementation for support of the ACPI Global
10555 Lock. On the OS side, the global lock is now treated as a standard AML
10556 mutex. Previously, multiple OS threads could "acquire" the global lock
10557 simultaneously. However, this could cause the BIOS to be starved out of
10559 lock - especially in cases such as the Embedded Controller driver where
10560 there is a tight coupling between the OS and the BIOS.
10562 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
10563 The Global Lock interrupt handler no longer queues the execution of a
10564 separate thread to signal the global lock semaphore. Instead, the
10566 is signaled directly from the interrupt handler.
10568 Implemented support within the AML interpreter for package objects that
10569 contain a larger AML length (package list length) than the package
10571 count. In this case, the length of the package is truncated to match the
10572 package element count. Some BIOS code apparently modifies the package
10574 on the fly, and this change supports this behavior. Provides
10576 with the MS AML interpreter. (With assistance from Fiodor Suietov)
10578 Implemented a temporary fix for the BankValue parameter of a Bank Field
10580 support all constant values, now including the Zero and One opcodes.
10581 Evaluation of this parameter must eventually be converted to a full
10583 evaluation. A not-implemented error is now returned (temporarily) for
10585 constant values for this parameter.
10587 Fixed problem reports (Fiodor Suietov) integrated:
10588 - Fix for premature object deletion after CopyObject on Operation Region
10592 Example Code and Data Size: These are the sizes for the OS-independent
10593 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10594 debug version of the code includes the debug output trace mechanism and
10596 a much larger code and data size.
10599 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
10600 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
10602 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10603 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10606 2) iASL Compiler/Disassembler and Tools:
10608 No changes for this release.
10610 ----------------------------------------
10611 07 July 2006. Summary of changes for version 20060707:
10613 1) ACPI CA Core Subsystem:
10615 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
10616 that do not allow the initialization of address pointers within packed
10617 structures - even though the hardware itself may support misaligned
10618 transfers. Some of the debug data structures are packed by default to
10621 Added an error message for the case where AcpiOsGetThreadId() returns
10623 A non-zero value is required by the core ACPICA code to ensure the proper
10624 operation of AML mutexes and recursive control methods.
10626 The DSDT is now the only ACPI table that determines whether the AML
10627 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
10629 the hooks for per-table 32/64 switching have been removed from the code.
10631 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
10633 Fixed a possible leak of an OwnerID in the error path of
10634 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
10635 deletion to a single place in AcpiTbUninstallTable to correct possible
10637 when using the AcpiTbDeleteTablesByType interface (with assistance from
10640 Fixed a problem with Serialized control methods where the semaphore
10641 associated with the method could be over-signaled after multiple method
10644 Fixed two issues with the locking of the internal namespace data
10646 Both the Unload() operator and AcpiUnloadTable interface now lock the
10647 namespace during the namespace deletion associated with the table unload
10648 (with assistance from Linn Crosetto.)
10650 Fixed problem reports (Valery Podrezov) integrated:
10651 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
10653 Fixed problem reports (Fiodor Suietov) integrated:
10654 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
10655 - On Address Space handler deletion, needless deactivation call (BZ 374)
10656 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
10658 - Possible memory leak, Notify sub-objects of Processor, Power,
10661 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
10662 - Minimum Length of RSDT should be validated (BZ 379)
10663 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
10665 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
10669 Example Code and Data Size: These are the sizes for the OS-independent
10670 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10671 debug version of the code includes the debug output trace mechanism and
10673 a much larger code and data size.
10676 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10677 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10679 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10680 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10683 2) iASL Compiler/Disassembler and Tools:
10685 Fixed problem reports:
10686 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
10689 ----------------------------------------
10690 23 June 2006. Summary of changes for version 20060623:
10692 1) ACPI CA Core Subsystem:
10694 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
10695 allows the type to be customized to the host OS for improved efficiency
10696 (since a spinlock is usually a very small object.)
10698 Implemented support for "ignored" bits in the ACPI registers. According
10700 the ACPI specification, these bits should be preserved when writing the
10701 registers via a read/modify/write cycle. There are 3 bits preserved in
10703 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
10705 Implemented the initial deployment of new OSL mutex interfaces. Since
10707 host operating systems have separate mutex and semaphore objects, this
10708 feature was requested. The base code now uses mutexes (and the new mutex
10709 interfaces) wherever a binary semaphore was used previously. However, for
10710 the current release, the mutex interfaces are defined as macros to map
10712 to the existing semaphore interfaces. Therefore, no OSL changes are
10714 at this time. (See acpiosxf.h)
10716 Fixed several problems with the support for the control method SyncLevel
10717 parameter. The SyncLevel now works according to the ACPI specification
10719 in concert with the Mutex SyncLevel parameter, since the current
10721 is a property of the executing thread. Mutual exclusion for control
10723 is now implemented with a mutex instead of a semaphore.
10725 Fixed three instances of the use of the C shift operator in the bitfield
10726 support code (exfldio.c) to avoid the use of a shift value larger than
10728 target data width. The behavior of C compilers is undefined in this case
10730 can cause unpredictable results, and therefore the case must be detected
10732 avoided. (Fiodor Suietov)
10734 Added an info message whenever an SSDT or OEM table is loaded dynamically
10735 via the Load() or LoadTable() ASL operators. This should improve
10737 capability since it will show exactly what tables have been loaded
10739 the tables present in the RSDT/XSDT.)
10741 Example Code and Data Size: These are the sizes for the OS-independent
10742 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10743 debug version of the code includes the debug output trace mechanism and
10745 a much larger code and data size.
10748 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10749 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10751 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10752 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10755 2) iASL Compiler/Disassembler and Tools:
10757 No changes for this release.
10759 ----------------------------------------
10760 08 June 2006. Summary of changes for version 20060608:
10762 1) ACPI CA Core Subsystem:
10764 Converted the locking mutex used for the ACPI hardware to a spinlock.
10766 change should eliminate all problems caused by attempting to acquire a
10767 semaphore at interrupt level, and it means that all ACPICA external
10768 interfaces that directly access the ACPI hardware can be safely called
10770 interrupt level. OSL code that implements the semaphore interfaces should
10772 able to eliminate any workarounds for being called at interrupt level.
10774 Fixed a regression introduced in 20060526 where the ACPI device
10775 initialization could be prematurely aborted with an AE_NOT_FOUND if a
10777 did not have an optional _INI method.
10779 Fixed an IndexField issue where a write to the Data Register should be
10780 limited in size to the AccessSize (width) of the IndexField itself. (BZ
10784 Fixed problem reports (Valery Podrezov) integrated:
10785 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
10787 Fixed problem reports (Fiodor Suietov) integrated:
10788 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
10790 Removed four global mutexes that were obsolete and were no longer being
10793 Example Code and Data Size: These are the sizes for the OS-independent
10794 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10795 debug version of the code includes the debug output trace mechanism and
10797 a much larger code and data size.
10800 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10801 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10803 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10804 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10807 2) iASL Compiler/Disassembler and Tools:
10809 Fixed a fault when using -g option (get tables from registry) on Windows
10812 Fixed problem reports integrated:
10813 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
10814 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
10816 - Global table revision override (-r) is ignored (BZ 413)
10818 ----------------------------------------
10819 26 May 2006. Summary of changes for version 20060526:
10821 1) ACPI CA Core Subsystem:
10823 Restructured, flattened, and simplified the internal interfaces for
10824 namespace object evaluation - resulting in smaller code, less CPU stack
10826 and fewer interfaces. (With assistance from Mikhail Kouzmich)
10828 Fixed a problem with the CopyObject operator where the first parameter
10830 not typed correctly for the parser, interpreter, compiler, and
10832 Caused various errors and unexpected behavior.
10834 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
10835 produced incorrect results with some C compilers. Since the behavior of C
10836 compilers when the shift value is larger than the datatype width is
10837 apparently not well defined, the interpreter now detects this condition
10839 simply returns zero as expected in all such cases. (BZ 395)
10841 Fixed problem reports (Valery Podrezov) integrated:
10842 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
10843 - Allow interpreter to handle nested method declarations (BZ 5361)
10845 Fixed problem reports (Fiodor Suietov) integrated:
10846 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
10848 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
10850 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
10851 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
10852 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
10853 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
10854 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
10855 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
10856 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
10858 - Status of the Global Initialization Handler call not used (BZ 366)
10859 - Incorrect object parameter to Global Initialization Handler (BZ 367)
10861 Example Code and Data Size: These are the sizes for the OS-independent
10862 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10863 debug version of the code includes the debug output trace mechanism and
10865 a much larger code and data size.
10868 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10869 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10871 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10872 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10875 2) iASL Compiler/Disassembler and Tools:
10877 Modified the parser to allow the names IO, DMA, and IRQ to be used as
10878 namespace identifiers with no collision with existing resource descriptor
10879 macro names. This provides compatibility with other ASL compilers and is
10880 most useful for disassembly/recompilation of existing tables without
10882 errors. (With assistance from Thomas Renninger)
10884 Disassembler: fixed an incorrect disassembly problem with the
10885 DataTableRegion and CopyObject operators. Fixed a possible fault during
10886 disassembly of some Alias operators.
10888 ----------------------------------------
10889 12 May 2006. Summary of changes for version 20060512:
10891 1) ACPI CA Core Subsystem:
10893 Replaced the AcpiOsQueueForExecution interface with a new interface named
10894 AcpiOsExecute. The major difference is that the new interface does not
10896 a Priority parameter, this appeared to be useless and has been replaced
10899 Type parameter. The Type tells the host what type of execution is being
10900 requested, such as global lock handler, notify handler, GPE handler, etc.
10901 This allows the host to queue and execute the request as appropriate for
10903 request type, possibly using different work queues and different
10905 for the various request types. This enables fixes for multithreading
10906 deadlock problems such as BZ #5534, and will require changes to all
10908 OS interface layers. (Alexey Starikovskiy and Bob Moore)
10910 Fixed a possible memory leak associated with the support for the so-
10912 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
10915 Fixed a problem with the Load() operator where a table load from an
10916 operation region could overwrite an internal table buffer by up to 7
10918 and cause alignment faults on IPF systems. (With assistance from Luming
10921 Example Code and Data Size: These are the sizes for the OS-independent
10922 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10923 debug version of the code includes the debug output trace mechanism and
10925 a much larger code and data size.
10928 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10929 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10931 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10932 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10936 2) iASL Compiler/Disassembler and Tools:
10938 Disassembler: Implemented support to cross reference the internal
10940 and automatically generate ASL External() statements for symbols not
10942 within the current table being disassembled. This will simplify the
10943 disassembly and recompilation of interdependent tables such as SSDTs
10945 these statements will no longer have to be added manually.
10947 Disassembler: Implemented experimental support to automatically detect
10948 invocations of external control methods and generate appropriate
10950 statements. This is problematic because the AML cannot be correctly
10952 until the number of arguments for each control method is known.
10954 standalone method invocations and invocations as the source operand of a
10955 Store() statement are supported.
10957 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
10958 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
10959 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
10960 more readable and likely closer to the original ASL source.
10962 ----------------------------------------
10963 21 April 2006. Summary of changes for version 20060421:
10965 1) ACPI CA Core Subsystem:
10967 Removed a device initialization optimization introduced in 20051216 where
10968 the _STA method was not run unless an _INI was also present for the same
10969 device. This optimization could cause problems because it could allow
10971 methods to be run within a not-present device subtree. (If a not-present
10972 device had no _INI, _STA would not be run, the not-present status would
10974 be discovered, and the children of the device would be incorrectly
10977 Implemented a new _STA optimization where namespace subtrees that do not
10978 contain _INI are identified and ignored during device initialization.
10979 Selectively running _STA can significantly improve boot time on large
10980 machines (with assistance from Len Brown.)
10982 Implemented support for the device initialization case where the returned
10983 _STA flags indicate a device not-present but functioning. In this case,
10985 is not run, but the device children are examined for presence, as per the
10986 ACPI specification.
10988 Implemented an additional change to the IndexField support in order to
10989 conform to MS behavior. The value written to the Index Register is not
10990 simply a byte offset, it is a byte offset in units of the access width of
10991 the parent Index Field. (Fiodor Suietov)
10993 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
10994 interface is called during the creation of all AML operation regions, and
10995 allows the host OS to exert control over what addresses it will allow the
10996 AML code to access. Operation Regions whose addresses are disallowed will
10997 cause a runtime exception when they are actually accessed (will not
10999 or abort table loading.) See oswinxf or osunixxf for an example
11002 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
11003 interface allows the host OS to match the various "optional"
11004 interface/behavior strings for the _OSI predefined control method as
11005 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
11006 for an example implementation.
11008 Restructured and corrected various problems in the exception handling
11010 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
11011 (with assistance from Takayoshi Kochi.)
11013 Modified the Linux source converter to ignore quoted string literals
11015 converting identifiers from mixed to lower case. This will correct
11017 with the disassembler and other areas where such strings must not be
11020 The ACPI_FUNCTION_* macros no longer require quotes around the function
11021 name. This allows the Linux source converter to convert the names, now
11023 the converter ignores quoted strings.
11025 Example Code and Data Size: These are the sizes for the OS-independent
11026 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11027 debug version of the code includes the debug output trace mechanism and
11029 a much larger code and data size.
11033 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11034 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11036 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
11037 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
11040 2) iASL Compiler/Disassembler and Tools:
11042 Implemented 3 new warnings for iASL, and implemented multiple warning
11046 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
11048 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
11049 check for the possible timeout, a warning is issued.
11051 2) Useless operators: If an ASL operator does not specify an optional
11053 operand and it also does not use the function return value from the
11054 operator, a warning is issued since the operator effectively does
11057 3) Unreferenced objects: If a namespace object is created, but never
11058 referenced, a warning is issued. This is a warning level 2 since there
11060 cases where this is ok, such as when a secondary table is loaded that
11062 the unreferenced objects. Even so, care is taken to only flag objects
11064 don't look like they will ever be used. For example, the reserved methods
11065 (starting with an underscore) are usually not referenced because it is
11066 expected that the OS will invoke them.
11068 ----------------------------------------
11069 31 March 2006. Summary of changes for version 20060331:
11071 1) ACPI CA Core Subsystem:
11073 Implemented header file support for the following additional ACPI tables:
11074 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
11076 all current and known ACPI tables are now defined in the ACPICA headers
11078 are available for use by device drivers and other software.
11080 Implemented support to allow tables that contain ACPI names with invalid
11081 characters to be loaded. Previously, this would cause the table load to
11082 fail, but since there are several known cases of such tables on existing
11083 machines, this change was made to enable ACPI support for them. Also,
11085 matches the behavior of the Microsoft ACPI implementation.
11087 Fixed a couple regressions introduced during the memory optimization in
11089 20060317 release. The namespace node definition required additional
11090 reorganization and an internal datatype that had been changed to 8-bit
11092 restored to 32-bit. (Valery Podrezov)
11094 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
11095 could be passed through to AcpiOsReleaseObject which is unexpected. Such
11096 null pointers are now trapped and ignored, matching the behavior of the
11097 previous implementation before the deployment of AcpiOsReleaseObject.
11098 (Valery Podrezov, Fiodor Suietov)
11100 Fixed a memory mapping leak during the deletion of a SystemMemory
11102 region where a cached memory mapping was not deleted. This became a
11103 noticeable problem for operation regions that are defined within
11105 used control methods. (Dana Meyers)
11107 Reorganized the ACPI table header files into two main files: one for the
11108 ACPI tables consumed by the ACPICA core, and another for the
11110 ACPI tables that are consumed by the drivers and other software. The
11112 FADT definitions were merged into one common section and three different
11113 tables (ACPI 1.0, 1.0+, and 2.0)
11115 Example Code and Data Size: These are the sizes for the OS-independent
11116 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11117 debug version of the code includes the debug output trace mechanism and
11119 a much larger code and data size.
11122 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11123 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11125 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11126 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11129 2) iASL Compiler/Disassembler and Tools:
11131 Disassembler: Implemented support to decode and format all non-AML ACPI
11132 tables (tables other than DSDTs and SSDTs.) This includes the new tables
11133 added to the ACPICA headers, therefore all current and known ACPI tables
11137 Disassembler: The change to allow ACPI names with invalid characters also
11138 enables the disassembly of such tables. Invalid characters within names
11140 changed to '*' to make the name printable; the iASL compiler will still
11141 generate an error for such names, however, since this is an invalid ACPI
11144 Implemented an option for AcpiXtract (-a) to extract all tables found in
11146 input file. The default invocation extracts only the DSDTs and SSDTs.
11148 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
11149 makefile for the AcpiXtract utility.
11151 ----------------------------------------
11152 17 March 2006. Summary of changes for version 20060317:
11154 1) ACPI CA Core Subsystem:
11156 Implemented the use of a cache object for all internal namespace nodes.
11157 Since there are about 1000 static nodes in a typical system, this will
11158 decrease memory use for cache implementations that minimize per-
11160 overhead (such as a slab allocator.)
11162 Removed the reference count mechanism for internal namespace nodes, since
11164 was deemed unnecessary. This reduces the size of each namespace node by
11165 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
11167 and 32 bytes for the 64-bit case.
11169 Optimized several internal data structures to reduce object size on 64-
11171 platforms by packing data within the 64-bit alignment. This includes the
11172 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
11173 instances corresponding to the namespace objects.
11175 Added two new strings for the predefined _OSI method: "Windows 2001.1
11177 and "Windows 2006".
11179 Split the allocation tracking mechanism out to a separate file, from
11180 utalloc.c to uttrack.c. This mechanism appears to be only useful for
11181 application-level code. Kernels may wish to not include uttrack.c in
11184 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
11186 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
11189 Code and Data Size: These are the sizes for the acpica.lib produced by
11191 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11193 driver or OSPM code. The debug version of the code includes the debug
11195 trace mechanism and has a much larger code and data size. Note that these
11196 values will vary depending on the efficiency of the compiler and the
11197 compiler options used during generation.
11200 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11201 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11203 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11204 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11207 2) iASL Compiler/Disassembler and Tools:
11209 Implemented an ANSI C version of the acpixtract utility. This version
11211 automatically extract the DSDT and all SSDTs from the input acpidump text
11212 file and dump the binary output to separate files. It can also display a
11213 summary of the input file including the headers for each table found and
11214 will extract any single ACPI table, with any signature. (See
11215 source/tools/acpixtract)
11217 ----------------------------------------
11218 10 March 2006. Summary of changes for version 20060310:
11220 1) ACPI CA Core Subsystem:
11222 Tagged all external interfaces to the subsystem with the new
11223 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
11225 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
11226 macro. The default definition is NULL.
11228 Added the ACPI_THREAD_ID type for the return value from
11230 This allows the host to define this as necessary to simplify kernel
11231 integration. The default definition is ACPI_NATIVE_UINT.
11233 Fixed two interpreter problems related to error processing, the deletion
11235 objects, and placing invalid pointers onto the internal operator result
11236 stack. BZ 6028, 6151 (Valery Podrezov)
11238 Increased the reference count threshold where a warning is emitted for
11240 reference counts in order to eliminate unnecessary warnings on systems
11242 large namespaces (especially 64-bit.) Increased the value from 0x400 to
11245 Due to universal disagreement as to the meaning of the 'c' in the
11247 function, the ACPI_MEM_CALLOCATE macro has been renamed to
11248 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
11249 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
11252 Code and Data Size: These are the sizes for the acpica.lib produced by
11254 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11256 driver or OSPM code. The debug version of the code includes the debug
11258 trace mechanism and has a much larger code and data size. Note that these
11259 values will vary depending on the efficiency of the compiler and the
11260 compiler options used during generation.
11263 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11264 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11266 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11267 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11270 2) iASL Compiler/Disassembler:
11272 Disassembler: implemented support for symbolic resource descriptor
11273 references. If a CreateXxxxField operator references a fixed offset
11276 resource descriptor, a name is assigned to the descriptor and the offset
11278 translated to the appropriate resource tag and pathname. The addition of
11279 this support brings the disassembled code very close to the original ASL
11280 source code and helps eliminate run-time errors when the disassembled
11282 is modified (and recompiled) in such a way as to invalidate the original
11285 Implemented support for a Descriptor Name as the last parameter to the
11287 Register() macro. This parameter was inadvertently left out of the ACPI
11288 specification, and will be added for ACPI 3.0b.
11290 Fixed a problem where the use of the "_OSI" string (versus the full path
11291 "\_OSI") caused an internal compiler error. ("No back ptr to op")
11293 Fixed a problem with the error message that occurs when an invalid string
11295 used for a _HID object (such as one with an embedded asterisk:
11297 The correct message is now displayed.
11299 ----------------------------------------
11300 17 February 2006. Summary of changes for version 20060217:
11302 1) ACPI CA Core Subsystem:
11304 Implemented a change to the IndexField support to match the behavior of
11306 Microsoft AML interpreter. The value written to the Index register is now
11308 byte offset, no longer an index based upon the width of the Data
11310 This should fix IndexField problems seen on some machines where the Data
11311 register is not exactly one byte wide. The ACPI specification will be
11312 clarified on this point.
11314 Fixed a problem where several resource descriptor types could overrun the
11315 internal descriptor buffer due to size miscalculation: VendorShort,
11316 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
11317 affect all platforms.
11319 Fixed a problem where individual resource descriptors were misaligned
11321 the internal buffer, causing alignment faults on IA64 platforms.
11323 Code and Data Size: These are the sizes for the acpica.lib produced by
11325 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11327 driver or OSPM code. The debug version of the code includes the debug
11329 trace mechanism and has a much larger code and data size. Note that these
11330 values will vary depending on the efficiency of the compiler and the
11331 compiler options used during generation.
11334 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11335 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11337 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11338 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11341 2) iASL Compiler/Disassembler:
11343 Implemented support for new reserved names: _WDG and _WED are Microsoft
11344 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
11345 defined method (Throttling Depth Limit.)
11347 Fixed a problem where a zero-length VendorShort or VendorLong resource
11348 descriptor was incorrectly emitted as a descriptor of length one.
11350 ----------------------------------------
11351 10 February 2006. Summary of changes for version 20060210:
11353 1) ACPI CA Core Subsystem:
11355 Removed a couple of extraneous ACPI_ERROR messages that appeared during
11356 normal execution. These became apparent after the conversion from
11359 Fixed a problem where the CreateField operator could hang if the BitIndex
11361 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
11363 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
11364 failed with an exception. This also fixes a couple of related RefOf and
11365 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
11367 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
11369 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
11373 Implemented a memory cleanup at the end of the execution of each
11375 of an AML While() loop, preventing the accumulation of outstanding
11377 (Valery Podrezov, BZ 5427)
11379 Eliminated a chunk of duplicate code in the object resolution code.
11383 Fixed several warnings during the 64-bit code generation.
11385 The AcpiSrc source code conversion tool now inserts one line of
11387 after an if() statement that is followed immediately by a comment,
11389 readability of the Linux code.
11391 Code and Data Size: The current and previous library sizes for the core
11392 subsystem are shown below. These are the code and data sizes for the
11393 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11395 values do not include any ACPI driver or OSPM code. The debug version of
11397 code includes the debug output trace mechanism and has a much larger code
11398 and data size. Note that these values will vary depending on the
11400 of the compiler and the compiler options used during generation.
11403 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11404 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11406 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11407 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11410 2) iASL Compiler/Disassembler:
11412 Fixed a problem with the disassembly of a BankField operator with a
11414 expression for the BankValue parameter.
11416 ----------------------------------------
11417 27 January 2006. Summary of changes for version 20060127:
11419 1) ACPI CA Core Subsystem:
11421 Implemented support in the Resource Manager to allow unresolved
11423 references within resource package objects for the _PRT method. This
11425 is in addition to the previously implemented unresolved reference support
11426 within the AML parser. If the interpreter slack mode is enabled, these
11427 unresolved references will be passed through to the caller as a NULL
11431 Implemented and deployed new macros and functions for error and warning
11432 messages across the subsystem. These macros are simpler and generate less
11433 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
11434 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
11435 macros remain defined to allow ACPI drivers time to migrate to the new
11438 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
11440 Acquire/Release Lock OSL interfaces.
11442 Fixed a problem where Alias ASL operators are sometimes not correctly
11443 resolved, in both the interpreter and the iASL compiler.
11445 Fixed several problems with the implementation of the
11446 ConcatenateResTemplate
11447 ASL operator. As per the ACPI specification, zero length buffers are now
11448 treated as a single EndTag. One-length buffers always cause a fatal
11449 exception. Non-zero length buffers that do not end with a full 2-byte
11451 cause a fatal exception.
11453 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
11454 interface. (With assistance from Thomas Renninger)
11456 Code and Data Size: The current and previous library sizes for the core
11457 subsystem are shown below. These are the code and data sizes for the
11458 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11460 values do not include any ACPI driver or OSPM code. The debug version of
11462 code includes the debug output trace mechanism and has a much larger code
11463 and data size. Note that these values will vary depending on the
11465 of the compiler and the compiler options used during generation.
11468 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11469 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11471 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11472 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11475 2) iASL Compiler/Disassembler:
11477 Fixed an internal error that was generated for any forward references to
11481 ----------------------------------------
11482 13 January 2006. Summary of changes for version 20060113:
11484 1) ACPI CA Core Subsystem:
11486 Added 2006 copyright to all module headers and signons. This affects
11487 virtually every file in the ACPICA core subsystem, iASL compiler, and the
11490 Enhanced the ACPICA error reporting in order to simplify user migration
11492 the non-debug version of ACPICA. Replaced all instances of the
11493 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
11495 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
11496 respectively. This preserves all error and warning messages in the non-
11498 version of the ACPICA code (this has been referred to as the "debug lite"
11499 option.) Over 200 cases were converted to create a total of over 380
11500 error/warning messages across the ACPICA code. This increases the code
11502 data size of the default non-debug version of the code somewhat (about
11504 but all error/warning reporting may be disabled if desired (and code
11505 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
11506 configuration option. The size of the debug version of ACPICA remains
11510 Fixed a memory leak within the AML Debugger "Set" command. One object was
11511 not properly deleted for every successful invocation of the command.
11513 Code and Data Size: The current and previous library sizes for the core
11514 subsystem are shown below. These are the code and data sizes for the
11515 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11517 values do not include any ACPI driver or OSPM code. The debug version of
11519 code includes the debug output trace mechanism and has a much larger code
11520 and data size. Note that these values will vary depending on the
11522 of the compiler and the compiler options used during generation.
11525 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11526 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11528 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11529 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11532 2) iASL Compiler/Disassembler:
11534 The compiler now officially supports the ACPI 3.0a specification that was
11535 released on December 30, 2005. (Specification is available at
11538 ----------------------------------------
11539 16 December 2005. Summary of changes for version 20051216:
11541 1) ACPI CA Core Subsystem:
11543 Implemented optional support to allow unresolved names within ASL Package
11544 objects. A null object is inserted in the package when a named reference
11545 cannot be located in the current namespace. Enabled via the interpreter
11546 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
11548 that contain such code.
11550 Implemented an optimization to the initialization sequence that can
11552 boot time. During ACPI device initialization, the _STA method is now run
11554 and only if the _INI method exists. The _STA method is used to determine
11556 the device is present; An _INI can only be run if _STA returns present,
11558 it is a waste of time to run the _STA method if the _INI does not exist.
11559 (Prototype and assistance from Dong Wei)
11561 Implemented use of the C99 uintptr_t for the pointer casting macros if it
11563 available in the current compiler. Otherwise, the default (void *) cast
11567 Fixed some possible memory leaks found within the execution path of the
11568 Break, Continue, If, and CreateField operators. (Valery Podrezov)
11570 Fixed a problem introduced in the 20051202 release where an exception is
11571 generated during method execution if a control method attempts to declare
11574 Moved resource descriptor string constants that are used by both the AML
11575 disassembler and AML debugger to the common utilities directory so that
11576 these components are independent.
11578 Implemented support in the AcpiExec utility (-e switch) to globally
11580 exceptions during control method execution (method is not aborted.)
11582 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
11585 Code and Data Size: The current and previous library sizes for the core
11586 subsystem are shown below. These are the code and data sizes for the
11587 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11589 values do not include any ACPI driver or OSPM code. The debug version of
11591 code includes the debug output trace mechanism and has a much larger code
11592 and data size. Note that these values will vary depending on the
11594 of the compiler and the compiler options used during generation.
11597 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11598 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11600 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11601 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11604 2) iASL Compiler/Disassembler:
11606 Fixed a problem where a CPU stack overflow fault could occur if a
11608 method call was made from within a Return statement.
11610 ----------------------------------------
11611 02 December 2005. Summary of changes for version 20051202:
11613 1) ACPI CA Core Subsystem:
11615 Modified the parsing of control methods to no longer create namespace
11616 objects during the first pass of the parse. Objects are now created only
11617 during the execute phase, at the moment the namespace creation operator
11619 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
11621 should eliminate ALREADY_EXISTS exceptions seen on some machines where
11622 reentrant control methods are protected by an AML mutex. The mutex will
11624 correctly block multiple threads from attempting to create the same
11628 Increased the number of available Owner Ids for namespace object tracking
11629 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
11631 some machines with a large number of ACPI tables (either static or
11634 Fixed a problem with the AcpiExec utility where a fault could occur when
11636 -b switch (batch mode) is used.
11638 Enhanced the namespace dump routine to output the owner ID for each
11641 Code and Data Size: The current and previous library sizes for the core
11642 subsystem are shown below. These are the code and data sizes for the
11643 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11645 values do not include any ACPI driver or OSPM code. The debug version of
11647 code includes the debug output trace mechanism and has a much larger code
11648 and data size. Note that these values will vary depending on the
11650 of the compiler and the compiler options used during generation.
11653 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11654 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11656 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11657 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11660 2) iASL Compiler/Disassembler:
11662 Fixed a parse error during compilation of certain Switch/Case constructs.
11664 simplify the parse, the grammar now allows for multiple Default
11666 and this error is now detected and flagged during the analysis phase.
11668 Disassembler: The disassembly now includes the contents of the original
11669 table header within a comment at the start of the file. This includes the
11670 name and version of the original ASL compiler.
11672 ----------------------------------------
11673 17 November 2005. Summary of changes for version 20051117:
11675 1) ACPI CA Core Subsystem:
11677 Fixed a problem in the AML parser where the method thread count could be
11678 decremented below zero if any errors occurred during the method parse
11680 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
11682 This also fixed a related regression with the mechanism that detects and
11683 corrects methods that cannot properly handle reentrancy (related to the
11684 deployment of the new OwnerId mechanism.)
11686 Eliminated the pre-parsing of control methods (to detect errors) during
11687 table load. Related to the problem above, this was causing unwind issues
11689 any errors occurred during the parse, and it seemed to be overkill. A
11691 load should not be aborted if there are problems with any single control
11692 method, thus rendering this feature rather pointless.
11694 Fixed a problem with the new table-driven resource manager where an
11696 buffer overflow could occur for small resource templates.
11698 Implemented a new external interface, AcpiGetVendorResource. This
11700 will find and return a vendor-defined resource descriptor within a _CRS
11702 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
11705 Removed the length limit (200) on string objects as per the upcoming ACPI
11706 3.0A specification. This affects the following areas of the interpreter:
11708 any implicit conversion of a Buffer to a String, 2) a String object
11710 of the ASL Concatenate operator, 3) the String object result of the ASL
11713 Fixed a problem in the Windows OS interface layer (OSL) where a
11715 on a semaphore object would incorrectly timeout. This allows the
11716 multithreading features of the AcpiExec utility to work properly under
11719 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
11720 the recently added file named "utresrc.c".
11722 Code and Data Size: The current and previous library sizes for the core
11723 subsystem are shown below. These are the code and data sizes for the
11724 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11726 values do not include any ACPI driver or OSPM code. The debug version of
11728 code includes the debug output trace mechanism and has a much larger code
11729 and data size. Note that these values will vary depending on the
11731 of the compiler and the compiler options used during generation.
11734 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11735 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11737 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11738 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11741 2) iASL Compiler/Disassembler:
11743 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
11744 specification. For the iASL compiler, this means that string literals
11746 the source ASL can be of any length.
11748 Enhanced the listing output to dump the AML code for resource descriptors
11749 immediately after the ASL code for each descriptor, instead of in a block
11751 the end of the entire resource template.
11753 Enhanced the compiler debug output to dump the entire original parse tree
11754 constructed during the parse phase, before any transforms are applied to
11756 tree. The transformed tree is dumped also.
11758 ----------------------------------------
11759 02 November 2005. Summary of changes for version 20051102:
11761 1) ACPI CA Core Subsystem:
11763 Modified the subsystem initialization sequence to improve GPE support.
11765 GPE initialization has been split into two parts in order to defer
11767 of the _PRW methods (Power Resources for Wake) until after the hardware
11769 fully initialized and the SCI handler is installed. This allows the _PRW
11770 methods to access fields protected by the Global Lock. This will fix
11772 where a NO_GLOBAL_LOCK exception has been seen during initialization.
11774 Converted the ACPI internal object disassemble and display code within
11776 AML debugger to fully table-driven operation, reducing code size and
11777 increasing maintainability.
11779 Fixed a regression with the ConcatenateResTemplate() ASL operator
11781 in the 20051021 release.
11783 Implemented support for "local" internal ACPI object types within the
11784 debugger "Object" command and the AcpiWalkNamespace external interfaces.
11785 These local types include RegionFields, BankFields, IndexFields, Alias,
11789 Moved common AML resource handling code into a new file, "utresrc.c".
11791 code is shared by both the Resource Manager and the AML Debugger.
11793 Code and Data Size: The current and previous library sizes for the core
11794 subsystem are shown below. These are the code and data sizes for the
11795 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11797 values do not include any ACPI driver or OSPM code. The debug version of
11799 code includes the debug output trace mechanism and has a much larger code
11800 and data size. Note that these values will vary depending on the
11802 of the compiler and the compiler options used during generation.
11805 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11806 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11808 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11809 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11812 2) iASL Compiler/Disassembler:
11814 Fixed a problem with very large initializer lists (more than 4000
11816 for both Buffer and Package objects where the parse stack could overflow.
11818 Enhanced the pre-compile source code scan for non-ASCII characters to
11820 characters within comment fields. The scan is now always performed and is
11822 longer optional, detecting invalid characters within a source file
11823 immediately rather than during the parse phase or later.
11825 Enhanced the ASL grammar definition to force early reductions on all
11827 style grammar elements so that the overall parse stack usage is greatly
11828 reduced. This should improve performance and reduce the possibility of
11832 Eliminated all reduce/reduce conflicts in the iASL parser generation.
11834 with the addition of a %expected statement, the compiler generates from
11835 source with no warnings.
11837 Fixed a possible segment fault in the disassembler if the input filename
11838 does not contain a "dot" extension (Thomas Renninger).
11840 ----------------------------------------
11841 21 October 2005. Summary of changes for version 20051021:
11843 1) ACPI CA Core Subsystem:
11845 Implemented support for the EM64T and other x86-64 processors. This
11846 essentially entails recognizing that these processors support non-aligned
11847 memory transfers. Previously, all 64-bit processors were assumed to lack
11848 hardware support for non-aligned transfers.
11850 Completed conversion of the Resource Manager to nearly full table-driven
11851 operation. Specifically, the resource conversion code (convert AML to
11852 internal format and the reverse) and the debug code to dump internal
11853 resource descriptors are fully table-driven, reducing code and data size
11855 improving maintainability.
11857 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
11859 on 64-bit processors instead of a fixed 32-bit word. (With assistance
11861 Alexey Starikovskiy)
11863 Implemented support within the resource conversion code for the Type-
11864 Specific byte within the various ACPI 3.0 *WordSpace macros.
11866 Fixed some issues within the resource conversion code for the type-
11868 flags for both Memory and I/O address resource descriptors. For Memory,
11869 implemented support for the MTP and TTP flags. For I/O, split the TRS and
11870 TTP flags into two separate fields.
11872 Code and Data Size: The current and previous library sizes for the core
11873 subsystem are shown below. These are the code and data sizes for the
11874 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11876 values do not include any ACPI driver or OSPM code. The debug version of
11878 code includes the debug output trace mechanism and has a much larger code
11879 and data size. Note that these values will vary depending on the
11881 of the compiler and the compiler options used during generation.
11884 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11885 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11887 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11888 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11892 2) iASL Compiler/Disassembler:
11894 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
11896 corresponding ResourceSource string was not also present in a resource
11897 descriptor declaration. This restriction caused problems with existing
11898 AML/ASL code that includes the Index byte without the string. When such
11900 was disassembled, it could not be compiled without modification. Further,
11901 the modified code created a resource template with a different size than
11903 original, breaking code that used fixed offsets into the resource
11907 Removed a recent feature of the disassembler to ignore a lone
11909 byte. This byte is now emitted if present so that the exact AML can be
11910 reproduced when the disassembled code is recompiled.
11912 Improved comments and text alignment for the resource descriptor code
11913 emitted by the disassembler.
11915 Implemented disassembler support for the ACPI 3.0 AccessSize field within
11917 Register() resource descriptor.
11919 ----------------------------------------
11920 30 September 2005. Summary of changes for version 20050930:
11922 1) ACPI CA Core Subsystem:
11924 Completed a major overhaul of the Resource Manager code - specifically,
11925 optimizations in the area of the AML/internal resource conversion code.
11927 code has been optimized to simplify and eliminate duplicated code, CPU
11929 use has been decreased by optimizing function parameters and local
11930 variables, and naming conventions across the manager have been
11932 for clarity and ease of maintenance (this includes function, parameter,
11933 variable, and struct/typedef names.) The update may force changes in some
11934 driver code, depending on how resources are handled by the host OS.
11936 All Resource Manager dispatch and information tables have been moved to a
11937 single location for clarity and ease of maintenance. One new file was
11938 created, named "rsinfo.c".
11940 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
11941 guarantee that the argument is not evaluated twice, making them less
11943 to macro side-effects. However, since there exists the possibility of
11944 additional stack use if a particular compiler cannot optimize them (such
11946 in the debug generation case), the original macros are optionally
11948 Note that some invocations of the return_VALUE macro may now cause size
11949 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
11951 eliminate these. (From Randy Dunlap)
11953 Implemented a new mechanism to enable debug tracing for individual
11955 methods. A new external interface, AcpiDebugTrace, is provided to enable
11956 this mechanism. The intent is to allow the host OS to easily enable and
11957 disable tracing for problematic control methods. This interface can be
11958 easily exposed to a user or debugger interface if desired. See the file
11959 psxface.c for details.
11961 AcpiUtCallocate will now return a valid pointer if a length of zero is
11962 specified - a length of one is used and a warning is issued. This matches
11963 the behavior of AcpiUtAllocate.
11965 Code and Data Size: The current and previous library sizes for the core
11966 subsystem are shown below. These are the code and data sizes for the
11967 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11969 values do not include any ACPI driver or OSPM code. The debug version of
11971 code includes the debug output trace mechanism and has a much larger code
11972 and data size. Note that these values will vary depending on the
11974 of the compiler and the compiler options used during generation.
11977 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11978 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11980 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11981 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11984 2) iASL Compiler/Disassembler:
11986 A remark is issued if the effective compile-time length of a package or
11987 buffer is zero. Previously, this was a warning.
11989 ----------------------------------------
11990 16 September 2005. Summary of changes for version 20050916:
11992 1) ACPI CA Core Subsystem:
11994 Fixed a problem within the Resource Manager where support for the Generic
11995 Register descriptor was not fully implemented. This descriptor is now
11997 recognized, parsed, disassembled, and displayed.
11999 Completely restructured the Resource Manager code to utilize table-driven
12000 dispatch and lookup, eliminating many of the large switch() statements.
12002 reduces overall subsystem code size and code complexity. Affects the
12003 resource parsing and construction, disassembly, and debug dump output.
12005 Cleaned up and restructured the debug dump output for all resource
12006 descriptors. Improved readability of the output and reduced code size.
12008 Fixed a problem where changes to internal data structures caused the
12009 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
12011 Code and Data Size: The current and previous library sizes for the core
12012 subsystem are shown below. These are the code and data sizes for the
12013 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12015 values do not include any ACPI driver or OSPM code. The debug version of
12017 code includes the debug output trace mechanism and has a much larger code
12018 and data size. Note that these values will vary depending on the
12020 of the compiler and the compiler options used during generation.
12023 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12024 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12026 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
12027 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
12030 2) iASL Compiler/Disassembler:
12032 Updated the disassembler to automatically insert an EndDependentFn()
12034 into the ASL stream if this macro is missing in the original AML code,
12035 simplifying compilation of the resulting ASL module.
12037 Fixed a problem in the disassembler where a disassembled ResourceSource
12038 string (within a large resource descriptor) was not surrounded by quotes
12040 not followed by a comma, causing errors when the resulting ASL module was
12041 compiled. Also, escape sequences within a ResourceSource string are now
12042 handled correctly (especially "\\")
12044 ----------------------------------------
12045 02 September 2005. Summary of changes for version 20050902:
12047 1) ACPI CA Core Subsystem:
12049 Fixed a problem with the internal Owner ID allocation and deallocation
12050 mechanisms for control method execution and recursive method invocation.
12051 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
12052 messages seen on some systems. Recursive method invocation depth is
12053 currently limited to 255. (Alexey Starikovskiy)
12055 Completely eliminated all vestiges of support for the "module-level
12056 executable code" until this support is fully implemented and debugged.
12058 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
12059 some systems that invoke this support.
12061 Fixed a problem within the resource manager code where the transaction
12063 for a 64-bit address descriptor were handled incorrectly in the type-
12064 specific flag byte.
12066 Consolidated duplicate code within the address descriptor resource
12068 code, reducing overall subsystem code size.
12070 Fixed a fault when using the AML debugger "disassemble" command to
12071 disassemble individual control methods.
12073 Removed references to the "release_current" directory within the Unix
12076 Code and Data Size: The current and previous core subsystem library sizes
12077 are shown below. These are the code and data sizes for the acpica.lib
12078 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
12079 include any ACPI driver or OSPM code. The debug version of the code
12081 the debug output trace mechanism and has a much larger code and data
12083 Note that these values will vary depending on the efficiency of the
12085 and the compiler options used during generation.
12088 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12089 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12091 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12092 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12095 2) iASL Compiler/Disassembler:
12097 Implemented an error check for illegal duplicate values in the interrupt
12099 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
12102 Implemented error checking for the Irq() and IrqNoFlags() macros to
12104 too many values in the interrupt list (16 max) and invalid values in the
12105 list (range 0 - 15)
12107 The maximum length string literal within an ASL file is now restricted to
12108 200 characters as per the ACPI specification.
12110 Fixed a fault when using the -ln option (generate namespace listing).
12112 Implemented an error check to determine if a DescriptorName within a
12113 resource descriptor has already been used within the current scope.
12115 ----------------------------------------
12116 15 August 2005. Summary of changes for version 20050815:
12118 1) ACPI CA Core Subsystem:
12120 Implemented a full bytewise compare to determine if a table load request
12122 attempting to load a duplicate table. The compare is performed if the
12124 signatures and table lengths match. This will allow different tables with
12125 the same OEM Table ID and revision to be loaded - probably against the
12127 specification, but discovered in the field nonetheless.
12129 Added the changes.txt logfile to each of the zipped release packages.
12131 Code and Data Size: Current and previous core subsystem library sizes are
12132 shown below. These are the code and data sizes for the acpica.lib
12134 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12135 any ACPI driver or OSPM code. The debug version of the code includes the
12136 debug output trace mechanism and has a much larger code and data size.
12138 that these values will vary depending on the efficiency of the compiler
12140 the compiler options used during generation.
12143 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12144 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12146 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12147 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12150 2) iASL Compiler/Disassembler:
12152 Fixed a problem where incorrect AML code could be generated for Package
12153 objects if optimization is disabled (via the -oa switch).
12155 Fixed a problem with where incorrect AML code is generated for variable-
12156 length packages when the package length is not specified and the number
12158 initializer values is greater than 255.
12161 ----------------------------------------
12162 29 July 2005. Summary of changes for version 20050729:
12164 1) ACPI CA Core Subsystem:
12166 Implemented support to ignore an attempt to install/load a particular
12168 table more than once. Apparently there exists BIOS code that repeatedly
12169 attempts to load the same SSDT upon certain events. With assistance from
12170 Venkatesh Pallipadi.
12172 Restructured the main interface to the AML parser in order to correctly
12173 handle all exceptional conditions. This will prevent leakage of the
12175 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
12177 machines. With assistance from Alexey Starikovskiy.
12179 Support for "module level code" has been disabled in this version due to
12181 number of issues that have appeared on various machines. The support can
12183 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
12184 compilation. When the issues are fully resolved, the code will be enabled
12188 Modified the internal functions for debug print support to define the
12189 FunctionName parameter as a (const char *) for compatibility with
12191 built-in macros such as __FUNCTION__, etc.
12193 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
12195 Implemented support to display an object count summary for the AML
12197 commands Object and Methods.
12199 Code and Data Size: Current and previous core subsystem library sizes are
12200 shown below. These are the code and data sizes for the acpica.lib
12202 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12203 any ACPI driver or OSPM code. The debug version of the code includes the
12204 debug output trace mechanism and has a much larger code and data size.
12206 that these values will vary depending on the efficiency of the compiler
12208 the compiler options used during generation.
12211 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12212 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12214 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12215 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12218 2) iASL Compiler/Disassembler:
12220 Fixed a regression that appeared in the 20050708 version of the compiler
12221 where an error message was inadvertently emitted for invocations of the
12223 reserved control method.
12225 ----------------------------------------
12226 08 July 2005. Summary of changes for version 20050708:
12228 1) ACPI CA Core Subsystem:
12230 The use of the CPU stack in the debug version of the subsystem has been
12231 considerably reduced. Previously, a debug structure was declared in every
12232 function that used the debug macros. This structure has been removed in
12233 favor of declaring the individual elements as parameters to the debug
12234 functions. This reduces the cumulative stack use during nested execution
12236 ACPI function calls at the cost of a small increase in the code size of
12238 debug version of the subsystem. With assistance from Alexey Starikovskiy
12242 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
12243 headers to define a macro that will return the current function name at
12244 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
12246 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
12247 compiler-dependent header, the function name is saved on the CPU stack
12249 pointer per function.) This mechanism is used because apparently there
12250 exists no standard ANSI-C defined macro that that returns the function
12253 Redesigned and reimplemented the "Owner ID" mechanism used to track
12254 namespace objects created/deleted by ACPI tables and control method
12255 execution. A bitmap is now used to allocate and free the IDs, thus
12257 the wraparound problem present in the previous implementation. The size
12259 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
12262 Removed the UINT32_BIT and UINT16_BIT types that were used for the
12264 flag definitions within the headers for the predefined ACPI tables. These
12265 have been replaced by UINT8_BIT in order to increase the code portability
12267 the subsystem. If the use of UINT8 remains a problem, we may be forced to
12268 eliminate bitfields entirely because of a lack of portability.
12270 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
12272 is a frequently used function and this improvement increases the
12274 of the entire subsystem (Alexey Starikovskiy).
12276 Fixed several possible memory leaks and the inverse - premature object
12277 deletion (Alexey Starikovskiy).
12279 Code and Data Size: Current and previous core subsystem library sizes are
12280 shown below. These are the code and data sizes for the acpica.lib
12282 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12283 any ACPI driver or OSPM code. The debug version of the code includes the
12284 debug output trace mechanism and has a much larger code and data size.
12286 that these values will vary depending on the efficiency of the compiler
12288 the compiler options used during generation.
12291 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12292 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12294 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12295 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12297 ----------------------------------------
12298 24 June 2005. Summary of changes for version 20050624:
12300 1) ACPI CA Core Subsystem:
12302 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
12303 the host-defined cache object. This allows the OSL implementation to
12305 and type this object in any manner desired, simplifying the OSL
12306 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
12307 Linux, and should be defined in the OS-specific header file for other
12308 operating systems as required.
12310 Changed the interface to AcpiOsAcquireObject to directly return the
12311 requested object as the function return (instead of ACPI_STATUS.) This
12312 change was made for performance reasons, since this is the purpose of the
12313 interface in the first place. AcpiOsAcquireObject is now similar to the
12314 AcpiOsAllocate interface.
12316 Implemented a new AML debugger command named Businfo. This command
12318 information about all devices that have an associate _PRT object. The
12320 _HID, _UID, and _CID are displayed for these devices.
12322 Modified the initialization sequence in AcpiInitializeSubsystem to call
12324 OSL interface AcpiOslInitialize first, before any local initialization.
12326 change was required because the global initialization now calls OSL
12329 Enhanced the Dump command to display the entire contents of Package
12331 (including all sub-objects and their values.)
12333 Restructured the code base to split some files because of size and/or
12334 because the code logically belonged in a separate file. New files are
12336 below. All makefiles and project files included in the ACPI CA release
12339 utilities/utcache.c /* Local cache interfaces */
12340 utilities/utmutex.c /* Local mutex support */
12341 utilities/utstate.c /* State object support */
12342 interpreter/parser/psloop.c /* Main AML parse loop */
12344 Code and Data Size: Current and previous core subsystem library sizes are
12345 shown below. These are the code and data sizes for the acpica.lib
12347 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12348 any ACPI driver or OSPM code. The debug version of the code includes the
12349 debug output trace mechanism and has a much larger code and data size.
12351 that these values will vary depending on the efficiency of the compiler
12353 the compiler options used during generation.
12356 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12357 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12359 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12360 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12363 2) iASL Compiler/Disassembler:
12365 Fixed a regression introduced in version 20050513 where the use of a
12367 object within a Case() statement caused a compile time exception. The
12368 original behavior has been restored (a Match() operator is emitted.)
12370 ----------------------------------------
12371 17 June 2005. Summary of changes for version 20050617:
12373 1) ACPI CA Core Subsystem:
12375 Moved the object cache operations into the OS interface layer (OSL) to
12377 the host OS to handle these operations if desired (for example, the Linux
12378 OSL will invoke the slab allocator). This support is optional; the
12380 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
12382 code in the ACPI CA core. The new OSL interfaces are shown below. See
12383 utalloc.c for an example implementation, and acpiosxf.h for the exact
12384 interface definitions. With assistance from Alexey Starikovskiy.
12388 AcpiOsAcquireObject
12389 AcpiOsReleaseObject
12391 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
12393 and restore a flags parameter. This fits better with many OS lock models.
12394 Note: the current execution state (interrupt handler or not) is no longer
12395 passed to these interfaces. If necessary, the OSL must determine this
12397 by itself, a simple and fast operation. With assistance from Alexey
12400 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
12401 present if the revision of the RSDP was 2 or greater. According to the
12403 specification, the XSDT is optional in all cases, and the table manager
12404 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
12405 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
12409 Fixed an interpreter problem with the Mid() operator in the case of an
12411 string where the resulting output string is of zero length. It now
12413 returns a valid, null terminated string object instead of a string object
12414 with a null pointer.
12416 Fixed a problem with the control method argument handling to allow a
12418 to an Arg object that already contains an object of type Device. The
12420 object is now correctly overwritten. Previously, an error was returned.
12423 Enhanced the debugger Find command to emit object values in addition to
12425 found object pathnames. The output format is the same as the dump
12429 Enhanced the debugger Set command. It now has the ability to set the
12431 of any Named integer object in the namespace (Previously, only method
12433 and args could be set.)
12435 Code and Data Size: Current and previous core subsystem library sizes are
12436 shown below. These are the code and data sizes for the acpica.lib
12438 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12439 any ACPI driver or OSPM code. The debug version of the code includes the
12440 debug output trace mechanism and has a much larger code and data size.
12442 that these values will vary depending on the efficiency of the compiler
12444 the compiler options used during generation.
12447 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12448 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12450 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12451 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12454 2) iASL Compiler/Disassembler:
12456 Fixed a regression in the disassembler where if/else/while constructs
12458 output incorrectly. This problem was introduced in the previous release
12459 (20050526). This problem also affected the single-step disassembly in the
12462 Fixed a problem where compiling the reserved _OSI method would randomly
12464 rarely) produce compile errors.
12466 Enhanced the disassembler to emit compilable code in the face of
12468 AML resource descriptors. If the optional ResourceSourceIndex is present,
12469 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
12470 disassembly. Otherwise, the resulting code cannot be compiled without
12473 ----------------------------------------
12474 26 May 2005. Summary of changes for version 20050526:
12476 1) ACPI CA Core Subsystem:
12478 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
12479 the module level (not within a control method.) These opcodes are
12481 exactly once at the time the table is loaded. This type of code was legal
12483 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
12485 order to provide backwards compatibility with earlier BIOS
12487 This eliminates the "Encountered executable code at module level" warning
12488 that was previously generated upon detection of such code.
12490 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
12491 inadvertently be generated during the lookup of namespace objects in the
12492 second pass parse of ACPI tables and control methods. It appears that
12494 problem could occur during the resolution of forward references to
12498 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
12499 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
12500 allows the deadlock detection debug code to be compiled out in the normal
12501 case, improving mutex performance (and overall subsystem performance)
12504 Implemented a handful of miscellaneous fixes for possible memory leaks on
12505 error conditions and error handling control paths. These fixes were
12506 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
12508 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
12510 to prevent a fault in this error case.
12512 Code and Data Size: Current and previous core subsystem library sizes are
12513 shown below. These are the code and data sizes for the acpica.lib
12515 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12516 any ACPI driver or OSPM code. The debug version of the code includes the
12517 debug output trace mechanism and has a much larger code and data size.
12519 that these values will vary depending on the efficiency of the compiler
12521 the compiler options used during generation.
12524 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12525 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12527 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12528 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12531 2) iASL Compiler/Disassembler:
12533 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
12534 the module level (not within a control method.) These operators will be
12535 executed once at the time the table is loaded. This type of code was
12537 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
12538 compiler in order to provide backwards compatibility with earlier BIOS
12542 The ACPI integer width (specified via the table revision ID or the -r
12543 override, 32 or 64 bits) is now used internally during compile-time
12545 folding to ensure that constants are truncated to 32 bits if necessary.
12546 Previously, the revision ID value was only emitted in the AML table
12549 An error message is now generated for the Mutex and Method operators if
12551 SyncLevel parameter is outside the legal range of 0 through 15.
12553 Fixed a problem with the Method operator ParameterTypes list handling
12555 3.0). Previously, more than 2 types or 2 arguments generated a syntax
12557 The actual underlying implementation of method argument typechecking is
12558 still under development, however.
12560 ----------------------------------------
12561 13 May 2005. Summary of changes for version 20050513:
12563 1) ACPI CA Core Subsystem:
12565 Implemented support for PCI Express root bridges -- added support for
12567 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
12569 The interpreter now automatically truncates incoming 64-bit constants to
12571 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
12573 also affects the iASL compiler constant folding. (Note: as per below, the
12574 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
12576 Fixed a problem where string and buffer objects with "static" pointers
12577 (pointers to initialization data within an ACPI table) were not handled
12578 consistently. The internal object copy operation now always copies the
12580 to a newly allocated buffer, regardless of whether the source object is
12583 Fixed a problem with the FromBCD operator where an implicit result
12584 conversion was improperly performed while storing the result to the
12586 operand. Since this is an "explicit conversion" operator, the implicit
12587 conversion should never be performed on the output.
12589 Fixed a problem with the CopyObject operator where a copy to an existing
12590 named object did not always completely overwrite the existing object
12592 at name. Specifically, a buffer-to-buffer copy did not delete the
12596 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
12598 structs for consistency.
12600 Code and Data Size: Current and previous core subsystem library sizes are
12601 shown below. These are the code and data sizes for the acpica.lib
12603 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12604 any ACPI driver or OSPM code. The debug version of the code includes the
12605 debug output trace mechanism and has a much larger code and data size.
12607 that these values will vary depending on the efficiency of the compiler
12609 the compiler options used during generation.
12612 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12613 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12614 Current Release: (Same sizes)
12615 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12616 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12619 2) iASL Compiler/Disassembler:
12621 The compiler now emits a warning if an attempt is made to generate a 64-
12623 integer constant from within a 32-bit ACPI table (Revision < 2). The
12625 is truncated to 32 bits.
12627 Fixed a problem with large package objects: if the static length of the
12628 package is greater than 255, the "variable length package" opcode is
12629 emitted. Previously, this caused an error. This requires an update to the
12630 ACPI spec, since it currently (incorrectly) states that packages larger
12632 255 elements are not allowed.
12634 The disassembler now correctly handles variable length packages and
12636 larger than 255 elements.
12638 ----------------------------------------
12639 08 April 2005. Summary of changes for version 20050408:
12641 1) ACPI CA Core Subsystem:
12643 Fixed three cases in the interpreter where an "index" argument to an ASL
12644 function was still (internally) 32 bits instead of the required 64 bits.
12645 This was the Index argument to the Index, Mid, and Match operators.
12647 The "strupr" function is now permanently local (AcpiUtStrupr), since this
12649 not a POSIX-defined function and not present in most kernel-level C
12650 libraries. All references to the C library strupr function have been
12654 Completed the deployment of static functions/prototypes. All prototypes
12656 the static attribute have been moved from the headers to the owning C
12659 Implemented an extract option (-e) for the AcpiBin utility (AML binary
12660 utility). This option allows the utility to extract individual ACPI
12662 from the output of AcpiDmp. It provides the same functionality of the
12663 acpixtract.pl perl script without the worry of setting the correct perl
12664 options. AcpiBin runs on Windows and has not yet been generated/validated
12666 the Linux/Unix environment (but should be soon).
12668 Updated and fixed the table dump option for AcpiBin (-d). This option
12669 converts a single ACPI table to a hex/ascii file, similar to the output
12673 Code and Data Size: Current and previous core subsystem library sizes are
12674 shown below. These are the code and data sizes for the acpica.lib
12676 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12677 any ACPI driver or OSPM code. The debug version of the code includes the
12678 debug output trace mechanism and has a much larger code and data size.
12680 that these values will vary depending on the efficiency of the compiler
12682 the compiler options used during generation.
12685 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12686 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12688 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12689 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12692 2) iASL Compiler/Disassembler:
12694 Disassembler fix: Added a check to ensure that the table length found in
12696 ACPI table header within the input file is not longer than the actual
12698 file size. This indicates some kind of file or table corruption.
12700 ----------------------------------------
12701 29 March 2005. Summary of changes for version 20050329:
12703 1) ACPI CA Core Subsystem:
12705 An error is now generated if an attempt is made to create a Buffer Field
12707 length zero (A CreateField with a length operand of zero.)
12709 The interpreter now issues a warning whenever executable code at the
12711 level is detected during ACPI table load. This will give some idea of the
12712 prevalence of this type of code.
12714 Implemented support for references to named objects (other than control
12715 methods) within package objects.
12717 Enhanced package object output for the debug object. Package objects are
12719 completely dumped, showing all elements.
12721 Enhanced miscellaneous object output for the debug object. Any object can
12722 now be written to the debug object (for example, a device object can be
12723 written, and the type of the object will be displayed.)
12725 The "static" qualifier has been added to all local functions across both
12727 core subsystem and the iASL compiler.
12729 The number of "long" lines (> 80 chars) within the source has been
12730 significantly reduced, by about 1/3.
12732 Cleaned up all header files to ensure that all CA/iASL functions are
12733 prototyped (even static functions) and the formatting is consistent.
12735 Two new header files have been added, acopcode.h and acnames.h.
12737 Removed several obsolete functions that were no longer used.
12739 Code and Data Size: Current and previous core subsystem library sizes are
12740 shown below. These are the code and data sizes for the acpica.lib
12742 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12743 any ACPI driver or OSPM code. The debug version of the code includes the
12744 debug output trace mechanism and has a much larger code and data size.
12746 that these values will vary depending on the efficiency of the compiler
12748 the compiler options used during generation.
12751 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12752 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12754 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12755 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12759 2) iASL Compiler/Disassembler:
12761 Fixed a problem with the resource descriptor generation/support. For the
12762 ResourceSourceIndex and the ResourceSource fields, both must be present,
12764 both must be not present - can't have one without the other.
12766 The compiler now returns non-zero from the main procedure if any errors
12768 occurred during the compilation.
12771 ----------------------------------------
12772 09 March 2005. Summary of changes for version 20050309:
12774 1) ACPI CA Core Subsystem:
12776 The string-to-buffer implicit conversion code has been modified again
12778 a change to the ACPI specification. In order to match the behavior of
12780 other major ACPI implementation, the target buffer is no longer truncated
12782 the source string is smaller than an existing target buffer. This change
12783 requires an update to the ACPI spec, and should eliminate the recent
12784 AE_AML_BUFFER_LIMIT issues.
12786 The "implicit return" support was rewritten to a new algorithm that
12788 the general case. Rather than attempt to determine when a method is about
12790 exit, the result of every ASL operator is saved momentarily until the
12792 next ASL operator is executed. Therefore, no matter how the method exits,
12793 there will always be a saved implicit return value. This feature is only
12794 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
12796 AE_AML_NO_RETURN_VALUE errors when enabled.
12798 Implemented implicit conversion support for the predicate (operand) of
12800 If, Else, and While operators. String and Buffer arguments are
12802 converted to Integers.
12804 Changed the string-to-integer conversion behavior to match the new ACPI
12805 errata: "If no integer object exists, a new integer is created. The ASCII
12806 string is interpreted as a hexadecimal constant. Each string character is
12807 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
12808 with the first character as the most significant digit, and ending with
12810 first non-hexadecimal character or end-of-string." This means that the
12812 non-hex character terminates the conversion and this is the code that was
12815 Fixed a problem where the ObjectType operator would fail (fault) when
12817 on an Index of a Package which pointed to a null package element. The
12818 operator now properly returns zero (Uninitialized) in this case.
12820 Fixed a problem where the While operator used excessive memory by not
12821 properly popping the result stack during execution. There was no memory
12823 after execution, however. (Code provided by Valery Podrezov.)
12825 Fixed a problem where references to control methods within Package
12827 caused the method to be invoked, instead of producing a reference object
12828 pointing to the method.
12830 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
12832 improve performance and reduce code size. (Code provided by Alexey
12835 Code and Data Size: Current and previous core subsystem library sizes are
12836 shown below. These are the code and data sizes for the acpica.lib
12838 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12839 any ACPI driver or OSPM code. The debug version of the code includes the
12840 debug output trace mechanism and has a much larger code and data size.
12842 that these values will vary depending on the efficiency of the compiler
12844 the compiler options used during generation.
12847 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12848 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12850 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12851 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12854 2) iASL Compiler/Disassembler:
12856 Fixed a problem with the Return operator with no arguments. Since the AML
12857 grammar for the byte encoding requires an operand for the Return opcode,
12859 compiler now emits a Return(Zero) for this case. An ACPI specification
12860 update has been written for this case.
12862 For tables other than the DSDT, namepath optimization is automatically
12863 disabled. This is because SSDTs can be loaded anywhere in the namespace,
12865 compiler has no knowledge of where, and thus cannot optimize namepaths.
12867 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
12868 inadvertently omitted from the ACPI specification, and will require an
12869 update to the spec.
12871 The source file scan for ASCII characters is now optional (-a). This
12873 was made because some vendors place non-ascii characters within comments.
12874 However, the scan is simply a brute-force byte compare to ensure all
12875 characters in the file are in the range 0x00 to 0x7F.
12877 Fixed a problem with the CondRefOf operator where the compiler was
12878 inappropriately checking for the existence of the target. Since the point
12880 the operator is to check for the existence of the target at run-time, the
12881 compiler no longer checks for the target existence.
12883 Fixed a problem where errors generated from the internal AML interpreter
12884 during constant folding were not handled properly, causing a fault.
12886 Fixed a problem with overly aggressive range checking for the Stall
12887 operator. The valid range (max 255) is now only checked if the operand is
12889 type Integer. All other operand types cannot be statically checked.
12891 Fixed a problem where control method references within the RefOf,
12893 and ObjectType operators were not treated properly. They are now treated
12895 actual references, not method invocations.
12897 Fixed and enhanced the "list namespace" option (-ln). This option was
12899 a number of releases ago.
12901 Improved error handling for the Field, IndexField, and BankField
12903 The compiler now cleanly reports and recovers from errors in the field
12904 component (FieldUnit) list.
12906 Fixed a disassembler problem where the optional ResourceDescriptor fields
12907 TRS and TTP were not always handled correctly.
12909 Disassembler - Comments in output now use "//" instead of "/*"
12911 ----------------------------------------
12912 28 February 2005. Summary of changes for version 20050228:
12914 1) ACPI CA Core Subsystem:
12916 Fixed a problem where the result of an Index() operator (an object
12917 reference) must increment the reference count on the target object for
12919 life of the object reference.
12921 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
12922 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
12924 resource descriptors.
12926 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
12927 Space Descriptor" string, indicating interpreter support for the
12931 Implemented header support for the new ACPI 3.0 FADT flag bits.
12933 Implemented header support for the new ACPI 3.0 PCI Express bits for the
12935 status/enable registers.
12937 Updated header support for the MADT processor local Apic struct and MADT
12938 platform interrupt source struct for new ACPI 3.0 fields.
12940 Implemented header support for the SRAT and SLIT ACPI tables.
12942 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
12946 Code and Data Size: Current and previous core subsystem library sizes are
12947 shown below. These are the code and data sizes for the acpica.lib
12949 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12950 any ACPI driver or OSPM code. The debug version of the code includes the
12951 debug output trace mechanism and has a much larger code and data size.
12953 that these values will vary depending on the efficiency of the compiler
12955 the compiler options used during generation.
12958 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12959 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12961 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12962 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12965 2) iASL Compiler/Disassembler:
12967 Fixed a problem with the internal 64-bit String-to-integer conversion
12969 strings less than two characters long.
12971 Fixed a problem with constant folding where the result of the Index()
12972 operator can not be considered a constant. This means that Index() cannot
12974 a type3 opcode and this will require an update to the ACPI specification.
12976 Disassembler: Implemented support for the TTP, MTP, and TRS resource
12977 descriptor fields. These fields were inadvertently ignored and not output
12979 the disassembly of the resource descriptor.
12982 ----------------------------------------
12983 11 February 2005. Summary of changes for version 20050211:
12985 1) ACPI CA Core Subsystem:
12987 Implemented ACPI 3.0 support for implicit conversion within the Match()
12988 operator. MatchObjects can now be of type integer, buffer, or string
12990 of just type integer. Package elements are implicitly converted to the
12992 of the MatchObject. This change aligns the behavior of Match() with the
12993 behavior of the other logical operators (LLess(), etc.) It also requires
12995 errata change to the ACPI specification as this support was intended for
12996 ACPI 3.0, but was inadvertently omitted.
12998 Fixed a problem with the internal implicit "to buffer" conversion.
13000 that are converted to buffers will cause buffer truncation if the string
13002 smaller than the target buffer. Integers that are converted to buffers
13004 not cause buffer truncation, only zero extension (both as per the ACPI
13005 spec.) The problem was introduced when code was added to truncate the
13006 buffer, but this should not be performed in all cases, only the string
13009 Fixed a problem with the Buffer and Package operators where the
13011 would get confused if two such operators were used as operands to an ASL
13012 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
13013 stack was not being popped after the execution of these operators,
13015 in an AE_NO_RETURN_VALUE exception.
13017 Fixed a problem with constructs of the form Store(Index(...),...). The
13018 reference object returned from Index was inadvertently resolved to an
13020 value. This problem was introduced in version 20050114 when the behavior
13022 Store() was modified to restrict the object types that can be used as the
13023 source operand (to match the ACPI specification.)
13025 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
13027 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
13029 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
13031 Code and Data Size: Current and previous core subsystem library sizes are
13032 shown below. These are the code and data sizes for the acpica.lib
13034 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13035 any ACPI driver or OSPM code. The debug version of the code includes the
13036 debug output trace mechanism and has a much larger code and data size.
13038 that these values will vary depending on the efficiency of the compiler
13040 the compiler options used during generation.
13043 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13044 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13046 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
13047 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
13050 2) iASL Compiler/Disassembler:
13052 Fixed a code generation problem in the constant folding optimization code
13053 where incorrect code was generated if a constant was reduced to a buffer
13054 object (i.e., a reduced type 5 opcode.)
13056 Fixed a typechecking problem for the ToBuffer operator. Caused by an
13057 incorrect return type in the internal opcode information table.
13059 ----------------------------------------
13060 25 January 2005. Summary of changes for version 20050125:
13062 1) ACPI CA Core Subsystem:
13064 Fixed a recently introduced problem with the Global Lock where the
13065 underlying semaphore was not created. This problem was introduced in
13066 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
13067 Acquire() operation on _GL.
13069 The local object cache is now optional, and is disabled by default. Both
13070 AcpiExec and the iASL compiler enable the cache because they run in user
13071 mode and this enhances their performance. #define
13072 ACPI_ENABLE_OBJECT_CACHE
13073 to enable the local cache.
13075 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
13077 optional "implicit return" support where an error was returned if no
13079 object was expected, but one was implicitly returned. AE_OK is now
13081 in this case and the implicitly returned object is deleted.
13082 AcpiUtEvaluateObject is only occasionally used, and only to execute
13084 methods such as _STA and _INI where the return type is known up front.
13086 Fixed a few issues with the internal convert-to-integer code. It now
13088 an error if an attempt is made to convert a null string, a string of only
13089 blanks/tabs, or a zero-length buffer. This affects both implicit
13091 and explicit conversion via the ToInteger() operator.
13093 The internal debug code in AcpiUtAcquireMutex has been commented out. It
13095 not needed for normal operation and should increase the performance of
13097 entire subsystem. The code remains in case it is needed for debug
13101 The AcpiExec source and makefile are included in the Unix/Linux package
13105 Code and Data Size: Current and previous core subsystem library sizes are
13106 shown below. These are the code and data sizes for the acpica.lib
13108 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13109 any ACPI driver or OSPM code. The debug version of the code includes the
13110 debug output trace mechanism and has a much larger code and data size.
13112 that these values will vary depending on the efficiency of the compiler
13114 the compiler options used during generation.
13117 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13118 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13120 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13121 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13123 2) iASL Compiler/Disassembler:
13125 Switch/Case support: A warning is now issued if the type of the Switch
13127 cannot be determined at compile time. For example, Switch(Arg0) will
13128 generate the warning, and the type is assumed to be an integer. As per
13130 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
13134 Switch/Case support: Implemented support for buffer and string objects as
13135 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
13136 buffers and strings.
13138 Switch/Case support: The emitted code for the LEqual() comparisons now
13140 the switch value as the first operand, not the second. The case value is
13142 the second operand, and this allows the case value to be implicitly
13143 converted to the type of the switch value, not the other way around.
13145 Switch/Case support: Temporary variables are now emitted immediately
13147 the control method, not at the global level. This means that there are
13149 36 temps available per-method, not 36 temps per-module as was the case
13151 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
13153 ----------------------------------------
13154 14 January 2005. Summary of changes for version 20050114:
13156 Added 2005 copyright to all module headers. This affects every module in
13157 the core subsystem, iASL compiler, and the utilities.
13159 1) ACPI CA Core Subsystem:
13161 Fixed an issue with the String-to-Buffer conversion code where the string
13162 null terminator was not included in the buffer after conversion, but
13164 is existing ASL that assumes the string null terminator is included. This
13166 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
13167 introduced in the previous version when the code was updated to correctly
13168 set the converted buffer size as per the ACPI specification. The ACPI
13170 is ambiguous and will be updated to specify that the null terminator must
13172 included in the converted buffer. This also affects the ToBuffer() ASL
13175 Fixed a problem with the Mid() ASL/AML operator where it did not work
13176 correctly on Buffer objects. Newly created sub-buffers were not being
13181 Fixed a problem in AcpiTbFindTable where incorrect string compares were
13182 performed on the OemId and OemTableId table header fields. These fields
13184 not null terminated, so strncmp is now used instead of strcmp.
13186 Implemented a restriction on the Store() ASL/AML operator to align the
13187 behavior with the ACPI specification. Previously, any object could be
13189 as the source operand. Now, the only objects that may be used are
13191 Buffers, Strings, Packages, Object References, and DDB Handles. If
13192 necessary, the original behavior can be restored by enabling the
13193 EnableInterpreterSlack flag.
13195 Enhanced the optional "implicit return" support to allow an implicit
13197 value from methods that are invoked externally via the AcpiEvaluateObject
13198 interface. This enables implicit returns from the _STA and _INI methods,
13201 Changed the Revision() ASL/AML operator to return the current version of
13203 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
13205 the supported ACPI version (This is the function of the _REV method).
13207 Updated the _REV predefined method to return the currently supported
13211 Implemented batch mode option for the AcpiExec utility (-b).
13213 Code and Data Size: Current and previous core subsystem library sizes are
13214 shown below. These are the code and data sizes for the acpica.lib
13216 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13217 any ACPI driver or OSPM code. The debug version of the code includes the
13218 debug output trace mechanism and has a much larger code and data size.
13220 that these values will vary depending on the efficiency of the compiler
13222 the compiler options used during generation.
13225 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13226 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13228 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13229 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13231 ----------------------------------------
13232 10 December 2004. Summary of changes for version 20041210:
13234 ACPI 3.0 support is nearing completion in both the iASL compiler and the
13235 ACPI CA core subsystem.
13237 1) ACPI CA Core Subsystem:
13239 Fixed a problem in the ToDecimalString operator where the resulting
13241 length was incorrectly calculated. The length is now calculated exactly,
13242 eliminating incorrect AE_STRING_LIMIT exceptions.
13244 Fixed a problem in the ToHexString operator to allow a maximum 200
13246 string to be produced.
13248 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
13250 routine where the length of the resulting buffer was not truncated to the
13251 new size (if the target buffer already existed).
13253 Code and Data Size: Current and previous core subsystem library sizes are
13254 shown below. These are the code and data sizes for the acpica.lib
13256 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13257 any ACPI driver or OSPM code. The debug version of the code includes the
13258 debug output trace mechanism and has a much larger code and data size.
13260 that these values will vary depending on the efficiency of the compiler
13262 the compiler options used during generation.
13265 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13266 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13268 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13269 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13272 2) iASL Compiler/Disassembler:
13274 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
13275 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
13276 Includes support in the disassembler.
13278 Implemented support for the new (ACPI 3.0) parameter to the Register
13282 Fixed a problem where the _HE resource name for the Interrupt macro was
13283 referencing bit 0 instead of bit 1.
13285 Implemented check for maximum 255 interrupts in the Interrupt macro.
13287 Fixed a problem with the predefined resource descriptor names where
13288 incorrect AML code was generated if the offset within the resource buffer
13289 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
13290 but did not update the surrounding package lengths.
13292 Changes to the Dma macro: All channels within the channel list must be
13294 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
13295 optional (default is BusMaster).
13297 Implemented check for maximum 7 data bytes for the VendorShort macro.
13299 The ReadWrite parameter is now optional for the Memory32 and similar
13302 ----------------------------------------
13303 03 December 2004. Summary of changes for version 20041203:
13305 1) ACPI CA Core Subsystem:
13307 The low-level field insertion/extraction code (exfldio) has been
13309 rewritten to eliminate unnecessary complexity, bugs, and boundary
13312 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
13314 operators where the input operand could be inadvertently deleted if no
13315 conversion was necessary (e.g., if the input to ToInteger was an Integer
13318 Fixed a problem with the ToDecimalString and ToHexString where an
13320 exception code was returned if the resulting string would be > 200 chars.
13321 AE_STRING_LIMIT is now returned.
13323 Fixed a problem with the Concatenate operator where AE_OK was always
13324 returned, even if the operation failed.
13326 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
13327 semaphores to be allocated.
13329 Code and Data Size: Current and previous core subsystem library sizes are
13330 shown below. These are the code and data sizes for the acpica.lib
13332 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13333 any ACPI driver or OSPM code. The debug version of the code includes the
13334 debug output trace mechanism and has a much larger code and data size.
13336 that these values will vary depending on the efficiency of the compiler
13338 the compiler options used during generation.
13341 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13342 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13344 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13345 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13348 2) iASL Compiler/Disassembler:
13350 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
13351 recently introduced in 20041119.
13353 Fixed a problem with the ToUUID macro where the upper nybble of each
13355 byte was inadvertently set to zero.
13357 ----------------------------------------
13358 19 November 2004. Summary of changes for version 20041119:
13360 1) ACPI CA Core Subsystem:
13362 Fixed a problem in the internal ConvertToInteger routine where new
13364 were not truncated to 32 bits for 32-bit ACPI tables. This routine
13366 buffers and strings to integers.
13368 Implemented support to store a value to an Index() on a String object.
13370 is an ACPI 2.0 feature that had not yet been implemented.
13372 Implemented new behavior for storing objects to individual package
13374 (via the Index() operator). The previous behavior was to invoke the
13376 conversion rules if an object was already present at the index. The new
13377 behavior is to simply delete any existing object and directly store the
13379 object. Although the ACPI specification seems unclear on this subject,
13381 ACPI implementations behave in this manner. (This is the root of the
13382 AE_BAD_HEX_CONSTANT issue.)
13384 Modified the RSDP memory scan mechanism to support the extended checksum
13386 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
13387 RSDP signature is found with a valid checksum.
13389 Code and Data Size: Current and previous core subsystem library sizes are
13390 shown below. These are the code and data sizes for the acpica.lib
13392 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13393 any ACPI driver or OSPM code. The debug version of the code includes the
13394 debug output trace mechanism and has a much larger code and data size.
13396 that these values will vary depending on the efficiency of the compiler
13398 the compiler options used during generation.
13401 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13402 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13404 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13405 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13408 2) iASL Compiler/Disassembler:
13410 Fixed a missing semicolon in the aslcompiler.y file.
13412 ----------------------------------------
13413 05 November 2004. Summary of changes for version 20041105:
13415 1) ACPI CA Core Subsystem:
13417 Implemented support for FADT revision 2. This was an interim table
13419 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
13421 Implemented optional support to allow uninitialized LocalX and ArgX
13422 variables in a control method. The variables are initialized to an
13424 object with a value of zero. This support is enabled by setting the
13425 AcpiGbl_EnableInterpreterSlack flag to TRUE.
13427 Implemented support for Integer objects for the SizeOf operator. Either
13429 or 8 is returned, depending on the current integer size (32-bit or 64-
13431 depending on the parent table revision).
13433 Fixed a problem in the implementation of the SizeOf and ObjectType
13435 where the operand was resolved to a value too early, causing incorrect
13436 return values for some objects.
13438 Fixed some possible memory leaks during exceptional conditions.
13440 Code and Data Size: Current and previous core subsystem library sizes are
13441 shown below. These are the code and data sizes for the acpica.lib
13443 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13444 any ACPI driver or OSPM code. The debug version of the code includes the
13445 debug output trace mechanism and has a much larger code and data size.
13447 that these values will vary depending on the efficiency of the compiler
13449 the compiler options used during generation.
13452 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13453 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13455 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13456 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13459 2) iASL Compiler/Disassembler:
13461 Implemented support for all ACPI 3.0 reserved names and methods.
13463 Implemented all ACPI 3.0 grammar elements in the front-end, including
13464 support for semicolons.
13466 Implemented the ACPI 3.0 Function() and ToUUID() macros
13468 Fixed a problem in the disassembler where a Scope() operator would not be
13469 emitted properly if the target of the scope was in another table.
13471 ----------------------------------------
13472 15 October 2004. Summary of changes for version 20041015:
13474 Note: ACPI CA is currently undergoing an in-depth and complete formal
13475 evaluation to test/verify the following areas. Other suggestions are
13476 welcome. This will result in an increase in the frequency of releases and
13477 the number of bug fixes in the next few months.
13478 - Functional tests for all ASL/AML operators
13479 - All implicit/explicit type conversions
13480 - Bit fields and operation regions
13481 - 64-bit math support and 32-bit-only "truncated" math support
13482 - Exceptional conditions, both compiler and interpreter
13483 - Dynamic object deletion and memory leaks
13484 - ACPI 3.0 support when implemented
13485 - External interfaces to the ACPI subsystem
13488 1) ACPI CA Core Subsystem:
13490 Fixed two alignment issues on 64-bit platforms - within debug statements
13492 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
13494 field within the non-aligned ACPI generic address structure.
13496 Fixed a problem in the Increment and Decrement operators where incorrect
13497 operand resolution could result in the inadvertent modification of the
13498 original integer when the integer is passed into another method as an
13499 argument and the arg is then incremented/decremented.
13501 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
13503 BCD number were truncated during conversion.
13505 Fixed a problem in the ToDecimal operator where the length of the
13507 string could be set incorrectly too long if the input operand was a
13511 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
13513 within a buffer would prematurely terminate a compare between buffer
13516 Added a check for string overflow (>200 characters as per the ACPI
13517 specification) during the Concatenate operator with two string operands.
13519 Code and Data Size: Current and previous core subsystem library sizes are
13520 shown below. These are the code and data sizes for the acpica.lib
13522 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13523 any ACPI driver or OSPM code. The debug version of the code includes the
13524 debug output trace mechanism and has a much larger code and data size.
13526 that these values will vary depending on the efficiency of the compiler
13528 the compiler options used during generation.
13531 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13532 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13534 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13535 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13539 2) iASL Compiler/Disassembler:
13541 Allow the use of the ObjectType operator on uninitialized Locals and Args
13542 (returns 0 as per the ACPI specification).
13544 Fixed a problem where the compiler would fault if there was a syntax
13546 in the FieldName of all of the various CreateXXXField operators.
13548 Disallow the use of lower case letters within the EISAID macro, as per
13550 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
13552 U is an uppercase letter and N is a hex digit.
13555 ----------------------------------------
13556 06 October 2004. Summary of changes for version 20041006:
13558 1) ACPI CA Core Subsystem:
13560 Implemented support for the ACPI 3.0 Timer operator. This ASL function
13561 implements a 64-bit timer with 100 nanosecond granularity.
13563 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
13564 implement the ACPI 3.0 Timer operator. This allows the host OS to
13566 the timer with the best clock available. Also, it keeps the core
13568 out of the clock handling business, since the host OS (usually) performs
13571 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
13572 functions use a 64-bit address which is part of the packed ACPI Generic
13573 Address Structure. Since the structure is non-aligned, the alignment
13575 are now used to extract the address to a local variable before use.
13577 Fixed a problem where the ToInteger operator assumed all input strings
13579 hexadecimal. The operator now handles both decimal strings and hex
13581 (prefixed with "0x").
13583 Fixed a problem where the string length in the string object created as a
13584 result of the internal ConvertToString procedure could be incorrect. This
13585 potentially affected all implicit conversions and also the
13587 and ToHexString operators.
13589 Fixed two problems in the ToString operator. If the length parameter was
13590 zero, an incorrect string object was created and the value of the input
13591 length parameter was inadvertently changed from zero to Ones.
13593 Fixed a problem where the optional ResourceSource string in the
13595 resource macro was ignored.
13597 Simplified the interfaces to the internal division functions, reducing
13599 size and complexity.
13601 Code and Data Size: Current and previous core subsystem library sizes are
13602 shown below. These are the code and data sizes for the acpica.lib
13604 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13605 any ACPI driver or OSPM code. The debug version of the code includes the
13606 debug output trace mechanism and has a much larger code and data size.
13608 that these values will vary depending on the efficiency of the compiler
13610 the compiler options used during generation.
13613 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13614 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13616 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13617 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13620 2) iASL Compiler/Disassembler:
13622 Implemented support for the ACPI 3.0 Timer operator.
13624 Fixed a problem where the Default() operator was inadvertently ignored in
13626 Switch/Case block. This was a problem in the translation of the Switch
13627 statement to If...Else pairs.
13629 Added support to allow a standalone Return operator, with no parentheses
13633 Fixed a problem with code generation for the ElseIf operator where the
13634 translated Else...If parse tree was improperly constructed leading to the
13637 ----------------------------------------
13638 22 September 2004. Summary of changes for version 20040922:
13640 1) ACPI CA Core Subsystem:
13642 Fixed a problem with the implementation of the LNot() operator where
13644 was not returned for the TRUE case. Changed the code to return Ones
13646 of (!Arg) which was usually 1. This change affects iASL constant folding
13648 this operator also.
13650 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
13652 initialized properly -- Now zero the entire buffer in this case where the
13653 buffer already exists.
13655 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
13656 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
13657 related code considerably. This will require changes/updates to all OS
13658 interface layers (OSLs.)
13660 Implemented a new external interface, AcpiInstallExceptionHandler, to
13662 a system exception handler to be installed. This handler is invoked upon
13664 run-time exception that occurs during control method execution.
13666 Added support for the DSDT in AcpiTbFindTable. This allows the
13667 DataTableRegion() operator to access the local copy of the DSDT.
13669 Code and Data Size: Current and previous core subsystem library sizes are
13670 shown below. These are the code and data sizes for the acpica.lib
13672 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13673 any ACPI driver or OSPM code. The debug version of the code includes the
13674 debug output trace mechanism and has a much larger code and data size.
13676 that these values will vary depending on the efficiency of the compiler
13678 the compiler options used during generation.
13681 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13682 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13684 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13685 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13688 2) iASL Compiler/Disassembler:
13690 Fixed a problem with constant folding and the LNot operator. LNot was
13691 returning 1 in the TRUE case, not Ones as per the ACPI specification.
13693 could result in the generation of an incorrect folded/reduced constant.
13695 End-Of-File is now allowed within a "//"-style comment. A parse error no
13696 longer occurs if such a comment is at the very end of the input ASL
13700 Implemented the "-r" option to override the Revision in the table header.
13701 The initial use of this option will be to simplify the evaluation of the
13703 interpreter by allowing a single ASL source module to be compiled for
13705 32-bit or 64-bit integers.
13708 ----------------------------------------
13709 27 August 2004. Summary of changes for version 20040827:
13711 1) ACPI CA Core Subsystem:
13713 - Implemented support for implicit object conversion in the non-numeric
13714 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
13716 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
13717 the second operand is implicitly converted on the fly to match the type
13719 the first operand. For example:
13721 LEqual (Source1, Source2)
13723 Source1 and Source2 must each evaluate to an integer, a string, or a
13725 The data type of Source1 dictates the required type of Source2. Source2
13727 implicitly converted if necessary to match the type of Source1.
13729 - Updated and corrected the behavior of the string conversion support.
13731 rules concerning conversion of buffers to strings (according to the ACPI
13732 specification) are as follows:
13734 ToDecimalString - explicit byte-wise conversion of buffer to string of
13735 decimal values (0-255) separated by commas. ToHexString - explicit byte-
13737 conversion of buffer to string of hex values (0-FF) separated by commas.
13738 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
13740 copy with no transform except NULL terminated. Any other implicit buffer-
13742 string conversion - byte-wise conversion of buffer to string of hex
13744 (0-FF) separated by spaces.
13746 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
13748 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
13750 one byte too short in the case of a node in the root scope. This could
13751 cause a fault during debug output.
13753 - Code and Data Size: Current and previous core subsystem library sizes
13755 shown below. These are the code and data sizes for the acpica.lib
13757 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13758 any ACPI driver or OSPM code. The debug version of the code includes the
13759 debug output trace mechanism and has a much larger code and data size.
13761 that these values will vary depending on the efficiency of the compiler
13763 the compiler options used during generation.
13766 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13767 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13769 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13770 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13773 2) iASL Compiler/Disassembler:
13775 - Fixed a Linux generation error.
13778 ----------------------------------------
13779 16 August 2004. Summary of changes for version 20040816:
13781 1) ACPI CA Core Subsystem:
13783 Designed and implemented support within the AML interpreter for the so-
13784 called "implicit return". This support returns the result of the last
13786 operation within a control method, in the absence of an explicit Return()
13787 operator. A few machines depend on this behavior, even though it is not
13788 explicitly supported by the ASL language. It is optional support that
13790 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
13792 Removed support for the PCI_Config address space from the internal low
13794 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
13795 support was not used internally, and would not work correctly anyway
13797 the PCI bus number and segment number were not supported. There are
13798 separate interfaces for PCI configuration space access because of the
13802 Code and Data Size: Current and previous core subsystem library sizes are
13803 shown below. These are the code and data sizes for the acpica.lib
13805 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13806 any ACPI driver or OSPM code. The debug version of the code includes the
13807 debug output trace mechanism and has a much larger code and data size.
13809 that these values will vary depending on the efficiency of the compiler
13811 the compiler options used during generation.
13814 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13815 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13817 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13818 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13821 2) iASL Compiler/Disassembler:
13823 Fixed a problem where constants in ASL expressions at the root level (not
13824 within a control method) could be inadvertently truncated during code
13825 generation. This problem was introduced in the 20040715 release.
13828 ----------------------------------------
13829 15 July 2004. Summary of changes for version 20040715:
13831 1) ACPI CA Core Subsystem:
13833 Restructured the internal HW GPE interfaces to pass/track the current
13835 of interrupts (enabled/disabled) in order to avoid possible deadlock and
13836 increase flexibility of the interfaces.
13838 Implemented a "lexicographical compare" for String and Buffer objects
13840 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
13842 as per further clarification to the ACPI specification. Behavior is
13844 to C library "strcmp".
13846 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
13847 external function. In the 32-bit non-debug case, the stack use has been
13848 reduced from 168 bytes to 32 bytes.
13850 Deployed a new run-time configuration flag,
13851 AcpiGbl_EnableInterpreterSlack,
13852 whose purpose is to allow the AML interpreter to forgive certain bad AML
13853 constructs. Default setting is FALSE.
13855 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
13857 support code. If enabled, it allows field access to go beyond the end of
13859 region definition if the field is within the region length rounded up to
13861 next access width boundary (a common coding error.)
13863 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
13864 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
13866 symbols are lowercase by the latest version of the AcpiSrc tool.
13868 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
13869 rename "Register" to simply "Reg" to prevent certain compilers from
13872 Code and Data Size: Current and previous core subsystem library sizes are
13873 shown below. These are the code and data sizes for the acpica.lib
13875 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13876 any ACPI driver or OSPM code. The debug version of the code includes the
13877 debug output trace mechanism and has a much larger code and data size.
13879 that these values will vary depending on the efficiency of the compiler
13881 the compiler options used during generation.
13884 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13885 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13887 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13888 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13891 2) iASL Compiler/Disassembler:
13893 Implemented full support for Package objects within the Case() operator.
13894 Note: The Break() operator is currently not supported within Case blocks
13895 (TermLists) as there is some question about backward compatibility with
13900 Fixed a problem where complex terms were not supported properly within
13904 Eliminated extraneous warning for compiler-emitted reserved names of the
13905 form "_T_x". (Used in Switch/Case operators.)
13907 Eliminated optimization messages for "_T_x" objects and small constants
13908 within the DefinitionBlock operator.
13911 ----------------------------------------
13912 15 June 2004. Summary of changes for version 20040615:
13914 1) ACPI CA Core Subsystem:
13916 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13918 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13921 All directory names in the entire source package are lower case, as they
13922 were in earlier releases.
13924 Implemented "Disassemble" command in the AML debugger that will
13926 a single control method.
13928 Code and Data Size: Current and previous core subsystem library sizes are
13929 shown below. These are the code and data sizes for the acpica.lib
13931 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13932 any ACPI driver or OSPM code. The debug version of the code includes the
13933 debug output trace mechanism and has a much larger code and data size.
13935 that these values will vary depending on the efficiency of the compiler
13937 the compiler options used during generation.
13940 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13941 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13944 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13945 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13948 2) iASL Compiler/Disassembler:
13950 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13952 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13955 All directory names in the entire source package are lower case, as they
13956 were in earlier releases.
13958 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
13961 Fixed an issue with the Windows version of the compiler where later
13963 of Windows place the FADT in the registry under the name "FADT" and not
13964 "FACP" as earlier versions did. This applies when using the -g or -
13965 d<nofilename> options. The compiler now looks for both strings as
13968 Fixed a problem with compiler namepath optimization where a namepath
13970 the Scope() operator could not be optimized if the namepath was a subpath
13972 the current scope path.
13974 ----------------------------------------
13975 27 May 2004. Summary of changes for version 20040527:
13977 1) ACPI CA Core Subsystem:
13979 Completed a new design and implementation for EBDA (Extended BIOS Data
13981 support in the RSDP scan code. The original code improperly scanned for
13983 EBDA by simply scanning from memory location 0 to 0x400. The correct
13985 is to first obtain the EBDA pointer from within the BIOS data area, then
13986 scan 1K of memory starting at the EBDA pointer. There appear to be few
13988 any machines that place the RSDP in the EBDA, however.
13990 Integrated a fix for a possible fault during evaluation of BufferField
13991 arguments. Obsolete code that was causing the problem was removed.
13993 Found and fixed a problem in the Field Support Code where data could be
13994 corrupted on a bit field read that starts on an aligned boundary but does
13995 not end on an aligned boundary. Merged the read/write "datum length"
13996 calculation code into a common procedure.
13998 Rolled in a couple of changes to the FreeBSD-specific header.
14001 Code and Data Size: Current and previous core subsystem library sizes are
14002 shown below. These are the code and data sizes for the acpica.lib
14004 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14005 any ACPI driver or OSPM code. The debug version of the code includes the
14006 debug output trace mechanism and has a much larger code and data size.
14008 that these values will vary depending on the efficiency of the compiler
14010 the compiler options used during generation.
14013 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14014 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
14016 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
14017 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
14020 2) iASL Compiler/Disassembler:
14022 Fixed a generation warning produced by some overly-verbose compilers for
14026 ----------------------------------------
14027 14 May 2004. Summary of changes for version 20040514:
14029 1) ACPI CA Core Subsystem:
14031 Fixed a problem where hardware GPE enable bits sometimes not set properly
14032 during and after GPE method execution. Result of 04/27 changes.
14034 Removed extra "clear all GPEs" when sleeping/waking.
14036 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
14037 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
14039 the new AcpiEv* calls as appropriate.
14041 ACPI_OS_NAME was removed from the OS-specific headers. The default name
14043 now "Microsoft Windows NT" for maximum compatibility. However this can
14045 changed by modifying the acconfig.h file.
14047 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
14048 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
14050 Run _INI methods on ThermalZone objects. This is against the ACPI
14051 specification, but there is apparently ASL code in the field that has
14053 _INI methods, and apparently "other" AML interpreters execute them.
14055 Performed a full 16/32/64 bit lint that resulted in some small changes.
14057 Added a sleep simulation command to the AML debugger to test sleep code.
14059 Code and Data Size: Current and previous core subsystem library sizes are
14060 shown below. These are the code and data sizes for the acpica.lib
14062 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14063 any ACPI driver or OSPM code. The debug version of the code includes the
14064 debug output trace mechanism and has a much larger code and data size.
14066 that these values will vary depending on the efficiency of the compiler
14068 the compiler options used during generation.
14071 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14072 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14074 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14075 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
14077 ----------------------------------------
14078 27 April 2004. Summary of changes for version 20040427:
14080 1) ACPI CA Core Subsystem:
14082 Completed a major overhaul of the GPE handling within ACPI CA. There are
14083 now three types of GPEs: wake-only, runtime-only, and combination
14085 The only GPEs allowed to be combination wake/run are for button-style
14086 devices such as a control-method power button, control-method sleep
14088 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
14090 referenced by any _PRW methods are marked for "runtime" and hardware
14091 enabled. Any GPE that is referenced by a _PRW method is marked for
14093 (and disabled at runtime). However, at sleep time, only those GPEs that
14094 have been specifically enabled for wake via the AcpiEnableGpe interface
14096 actually be hardware enabled.
14098 A new external interface has been added, AcpiSetGpeType(), that is meant
14100 be used by device drivers to force a GPE to a particular type. It will
14102 especially useful for the drivers for the button devices mentioned above.
14104 Completed restructuring of the ACPI CA initialization sequence so that
14105 default operation region handlers are installed before GPEs are
14107 and the _PRW methods are executed. This will prevent errors when the
14109 methods attempt to access system memory or I/O space.
14111 GPE enable/disable no longer reads the GPE enable register. We now keep
14113 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
14114 thus no longer depend on the hardware to maintain these bits.
14116 Always clear the wake status and fixed/GPE status bits before sleep, even
14119 Improved the AML debugger output for displaying the GPE blocks and their
14122 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
14126 Fixed a problem where the physical address was incorrectly calculated
14128 the Load() operator was used to directly load from an Operation Region
14130 loading from a Field object.) Also added check for minimum table length
14134 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
14137 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
14138 consistency with the other fields returned.
14140 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
14141 structure for each GPE in the system, so the size of this structure is
14144 CPU stack requirement reduction: Cleaned up the method execution and
14146 evaluation paths so that now a parameter structure is passed, instead of
14147 copying the various method parameters over and over again.
14149 In evregion.c: Correctly exit and reenter the interpreter region if and
14150 only if dispatching an operation region request to a user-installed
14152 Do not exit/reenter when dispatching to a default handler (e.g., default
14153 system memory or I/O handlers)
14156 Notes for updating drivers for the new GPE support. The following
14158 must be made to ACPI-related device drivers that are attached to one or
14160 GPEs: (This information will be added to the ACPI CA Programmer
14163 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
14165 explicitly call AcpiEnableGpe.
14166 2) There is a new interface called AcpiSetGpeType. This should be called
14167 before enabling the GPE. Also, this interface will automatically disable
14168 the GPE if it is currently enabled.
14169 3) AcpiEnableGpe no longer supports a GPE type flag.
14171 Specific drivers that must be changed:
14173 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
14174 AeGpeHandler, NULL);
14175 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
14176 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
14178 2) Button Drivers (Power, Lid, Sleep):
14179 Run _PRW method under parent device
14180 If _PRW exists: /* This is a control-method button */
14181 Extract GPE number and possibly GpeDevice
14182 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
14183 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
14185 For all other devices that have _PRWs, we automatically set the GPE type
14187 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
14189 must be done on a selective basis, usually requiring some kind of user
14191 to allow the user to pick the wake devices.
14194 Code and Data Size: Current and previous core subsystem library sizes are
14195 shown below. These are the code and data sizes for the acpica.lib
14197 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14198 any ACPI driver or OSPM code. The debug version of the code includes the
14199 debug output trace mechanism and has a much larger code and data size.
14201 that these values will vary depending on the efficiency of the compiler
14203 the compiler options used during generation.
14206 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14207 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14210 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14211 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14215 ----------------------------------------
14216 02 April 2004. Summary of changes for version 20040402:
14218 1) ACPI CA Core Subsystem:
14220 Fixed an interpreter problem where an indirect store through an ArgX
14221 parameter was incorrectly applying the "implicit conversion rules" during
14222 the store. From the ACPI specification: "If the target is a method local
14224 argument (LocalX or ArgX), no conversion is performed and the result is
14225 stored directly to the target". The new behavior is to disable implicit
14226 conversion during ALL stores to an ArgX.
14228 Changed the behavior of the _PRW method scan to ignore any and all errors
14229 returned by a given _PRW. This prevents the scan from aborting from the
14230 failure of any single _PRW.
14232 Moved the runtime configuration parameters from the global init procedure
14234 static variables in acglobal.h. This will allow the host to override the
14235 default values easily.
14237 Code and Data Size: Current and previous core subsystem library sizes are
14238 shown below. These are the code and data sizes for the acpica.lib
14240 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14241 any ACPI driver or OSPM code. The debug version of the code includes the
14242 debug output trace mechanism and has a much larger code and data size.
14244 that these values will vary depending on the efficiency of the compiler
14246 the compiler options used during generation.
14249 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14250 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14252 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14253 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14256 2) iASL Compiler/Disassembler:
14258 iASL now fully disassembles SSDTs. However, External() statements are
14260 generated automatically for unresolved symbols at this time. This is a
14261 planned feature for future implementation.
14263 Fixed a scoping problem in the disassembler that occurs when the type of
14265 target of a Scope() operator is overridden. This problem caused an
14266 incorrectly nested internal namespace to be constructed.
14268 Any warnings or errors that are emitted during disassembly are now
14270 out automatically so that the resulting file can be recompiled without
14274 ----------------------------------------
14275 26 March 2004. Summary of changes for version 20040326:
14277 1) ACPI CA Core Subsystem:
14279 Implemented support for "wake" GPEs via interaction between GPEs and the
14280 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
14281 identified as a WAKE GPE and by default will no longer be enabled at
14282 runtime. Previously, we were blindly enabling all GPEs with a
14284 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
14286 believe this has been the cause of thousands of "spurious" GPEs on some
14289 This new GPE behavior is can be reverted to the original behavior (enable
14290 ALL GPEs at runtime) via a runtime flag.
14292 Fixed a problem where aliased control methods could not access objects
14293 properly. The proper scope within the namespace was not initialized
14294 (transferred to the target of the aliased method) before executing the
14297 Fixed a potential race condition on internal object deletion on the
14299 object in AcpiEvaluateObject.
14301 Integrated a fix for resource descriptors where both _MEM and _MTP were
14302 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
14303 wide, 0x0F instead of 0x03.)
14305 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
14308 fault in some cases.
14310 Updated Notify() values for debug statements in evmisc.c
14312 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
14314 Code and Data Size: Current and previous core subsystem library sizes are
14315 shown below. These are the code and data sizes for the acpica.lib
14317 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14318 any ACPI driver or OSPM code. The debug version of the code includes the
14319 debug output trace mechanism and has a much larger code and data size.
14321 that these values will vary depending on the efficiency of the compiler
14323 the compiler options used during generation.
14327 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14328 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14330 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14331 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14333 ----------------------------------------
14334 11 March 2004. Summary of changes for version 20040311:
14336 1) ACPI CA Core Subsystem:
14338 Fixed a problem where errors occurring during the parse phase of control
14339 method execution did not abort cleanly. For example, objects created and
14340 installed in the namespace were not deleted. This caused all subsequent
14341 invocations of the method to return the AE_ALREADY_EXISTS exception.
14343 Implemented a mechanism to force a control method to "Serialized"
14345 if the method attempts to create namespace objects. (The root of the
14346 AE_ALREADY_EXISTS problem.)
14348 Implemented support for the predefined _OSI "internal" control method.
14349 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
14351 "Windows 2001.1", and can be easily upgraded for new strings as
14353 This feature will allow "other" operating systems to execute the fully
14354 tested, "Windows" code path through the ASL code
14356 Global Lock Support: Now allows multiple acquires and releases with any
14357 internal thread. Removed concept of "owning thread" for this special
14360 Fixed two functions that were inappropriately declaring large objects on
14362 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
14364 method execution considerably.
14366 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
14367 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
14369 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
14370 defined on the machine.
14372 Implemented two runtime options: One to force all control method
14374 to "Serialized" to mimic Windows behavior, another to disable _OSI
14376 if it causes problems on a given machine.
14378 Code and Data Size: Current and previous core subsystem library sizes are
14379 shown below. These are the code and data sizes for the acpica.lib
14381 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14382 any ACPI driver or OSPM code. The debug version of the code includes the
14383 debug output trace mechanism and has a much larger code and data size.
14385 that these values will vary depending on the efficiency of the compiler
14387 the compiler options used during generation.
14390 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14391 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14393 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14394 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14396 2) iASL Compiler/Disassembler:
14398 Fixed an array size problem for FreeBSD that would cause the compiler to
14401 ----------------------------------------
14402 20 February 2004. Summary of changes for version 20040220:
14405 1) ACPI CA Core Subsystem:
14407 Implemented execution of _SxD methods for Device objects in the
14408 GetObjectInfo interface.
14410 Fixed calls to _SST method to pass the correct arguments.
14412 Added a call to _SST on wake to restore to "working" state.
14414 Check for End-Of-Buffer failure case in the WalkResources interface.
14416 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
14417 structures to the beginning of the file.
14419 After wake, clear GPE status register(s) before enabling GPEs.
14421 After wake, clear/enable power button. (Perhaps we should clear/enable
14423 fixed events upon wake.)
14425 Fixed a couple of possible memory leaks in the Namespace manager.
14427 Integrated latest acnetbsd.h file.
14429 ----------------------------------------
14430 11 February 2004. Summary of changes for version 20040211:
14433 1) ACPI CA Core Subsystem:
14435 Completed investigation and implementation of the call-by-reference
14436 mechanism for control method arguments.
14438 Fixed a problem where a store of an object into an indexed package could
14439 fail if the store occurs within a different method than the method that
14440 created the package.
14442 Fixed a problem where the ToDecimal operator could return incorrect
14445 Fixed a problem where the CopyObject operator could fail on some of the
14447 obscure objects (e.g., Reference objects.)
14449 Improved the output of the Debug object to display buffer, package, and
14452 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
14454 the expected result.
14456 Added permanent ACPI_REPORT_ERROR macros for all instances of the
14457 ACPI_AML_INTERNAL exception.
14459 Integrated latest version of acfreebsd.h
14461 ----------------------------------------
14462 16 January 2004. Summary of changes for version 20040116:
14464 The purpose of this release is primarily to update the copyright years in
14465 each module, thus causing a huge number of diffs. There are a few small
14466 functional changes, however.
14468 1) ACPI CA Core Subsystem:
14470 Improved error messages when there is a problem finding one or more of
14472 required base ACPI tables
14474 Reintroduced the definition of APIC_HEADER in actbl.h
14476 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
14478 Removed extraneous reference to NewObj in dsmthdat.c
14482 Fixed a problem introduced in December that disabled the correct
14484 of Resource Templates
14487 ----------------------------------------
14488 03 December 2003. Summary of changes for version 20031203:
14490 1) ACPI CA Core Subsystem:
14492 Changed the initialization of Operation Regions during subsystem
14493 init to perform two entire walks of the ACPI namespace; The first
14494 to initialize the regions themselves, the second to execute the
14495 _REG methods. This fixed some interdependencies across _REG
14496 methods found on some machines.
14498 Fixed a problem where a Store(Local0, Local1) could simply update
14499 the object reference count, and not create a new copy of the
14500 object if the Local1 is uninitialized.
14502 Implemented support for the _SST reserved method during sleep
14505 Implemented support to clear the SLP_TYP and SLP_EN bits when
14506 waking up, this is apparently required by some machines.
14508 When sleeping, clear the wake status only if SleepState is not S5.
14510 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
14511 pointer arithmetic advanced a string pointer too far.
14513 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
14514 could be returned if the requested table has not been loaded.
14516 Within the support for IRQ resources, restructured the handling of
14517 the active and edge/level bits.
14519 Fixed a few problems in AcpiPsxExecute() where memory could be
14520 leaked under certain error conditions.
14522 Improved error messages for the cases where the ACPI mode could
14525 Code and Data Size: Current and previous core subsystem library
14526 sizes are shown below. These are the code and data sizes for the
14527 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14528 these values do not include any ACPI driver or OSPM code. The
14529 debug version of the code includes the debug output trace
14530 mechanism and has a much larger code and data size. Note that
14531 these values will vary depending on the efficiency of the compiler
14532 and the compiler options used during generation.
14534 Previous Release (20031029):
14535 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14536 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14538 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14539 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14541 2) iASL Compiler/Disassembler:
14543 Implemented a fix for the iASL disassembler where a bad index was
14544 generated. This was most noticeable on 64-bit platforms
14547 ----------------------------------------
14548 29 October 2003. Summary of changes for version 20031029:
14550 1) ACPI CA Core Subsystem:
14553 Fixed a problem where a level-triggered GPE with an associated
14554 _Lxx control method was incorrectly cleared twice.
14556 Fixed a problem with the Field support code where an access can
14557 occur beyond the end-of-region if the field is non-aligned but
14558 extends to the very end of the parent region (resulted in an
14559 AE_AML_REGION_LIMIT exception.)
14561 Fixed a problem with ACPI Fixed Events where an RT Clock handler
14562 would not get invoked on an RTC event. The RTC event bitmasks for
14563 the PM1 registers were not being initialized properly.
14565 Implemented support for executing _STA and _INI methods for
14566 Processor objects. Although this is currently not part of the
14567 ACPI specification, there is existing ASL code that depends on the
14568 init-time execution of these methods.
14570 Implemented and deployed a GetDescriptorName function to decode
14571 the various types of internal descriptors. Guards against null
14572 descriptors during debug output also.
14574 Implemented and deployed a GetNodeName function to extract the 4-
14575 character namespace node name. This function simplifies the debug
14576 and error output, as well as guarding against null pointers during
14579 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
14580 simplify the debug and error output of 64-bit integers. This
14581 macro replaces the HIDWORD and LODWORD macros for dumping these
14584 Updated the implementation of the Stall() operator to only call
14585 AcpiOsStall(), and also return an error if the operand is larger
14586 than 255. This preserves the required behavior of not
14587 relinquishing the processor, as would happen if AcpiOsSleep() was
14588 called for "long stalls".
14590 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
14591 initialized are now treated as NOOPs.
14593 Cleaned up a handful of warnings during 64-bit generation.
14595 Fixed a reported error where and incorrect GPE number was passed
14596 to the GPE dispatch handler. This value is only used for error
14597 output, however. Used this opportunity to clean up and streamline
14598 the GPE dispatch code.
14600 Code and Data Size: Current and previous core subsystem library
14601 sizes are shown below. These are the code and data sizes for the
14602 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14603 these values do not include any ACPI driver or OSPM code. The
14605 debug version of the code includes the debug output trace
14606 mechanism and has a much larger code and data size. Note that
14607 these values will vary depending on the efficiency of the compiler
14608 and the compiler options used during generation.
14610 Previous Release (20031002):
14611 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14612 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14614 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14615 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14618 2) iASL Compiler/Disassembler:
14620 Updated the iASL compiler to return an error if the operand to the
14621 Stall() operator is larger than 255.
14624 ----------------------------------------
14625 02 October 2003. Summary of changes for version 20031002:
14628 1) ACPI CA Core Subsystem:
14630 Fixed a problem with Index Fields where the index was not
14631 incremented for fields that require multiple writes to the
14632 index/data registers (Fields that are wider than the data
14635 Fixed a problem with all Field objects where a write could go
14636 beyond the end-of-field if the field was larger than the access
14637 granularity and therefore required multiple writes to complete the
14638 request. An extra write beyond the end of the field could happen
14641 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
14642 would incorrectly be returned if the width of the Data Register
14643 was larger than the specified field access width.
14645 Completed fixes for LoadTable() and Unload() and verified their
14646 operation. Implemented full support for the "DdbHandle" object
14647 throughout the ACPI CA subsystem.
14649 Implemented full support for the MADT and ECDT tables in the ACPI
14650 CA header files. Even though these tables are not directly
14651 consumed by ACPI CA, the header definitions are useful for ACPI
14654 Integrated resource descriptor fixes posted to the Linux ACPI
14655 list. This included checks for minimum descriptor length, and
14656 support for trailing NULL strings within descriptors that have
14657 optional string elements.
14659 Code and Data Size: Current and previous core subsystem library
14660 sizes are shown below. These are the code and data sizes for the
14661 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14662 these values do not include any ACPI driver or OSPM code. The
14663 debug version of the code includes the debug output trace
14664 mechanism and has a much larger code and data size. Note that
14665 these values will vary depending on the efficiency of the compiler
14666 and the compiler options used during generation.
14668 Previous Release (20030918):
14669 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14670 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14672 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14673 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14678 Implemented detection of non-ASCII characters within the input
14679 source ASL file. This catches attempts to compile binary (AML)
14680 files early in the compile, with an informative error message.
14682 Fixed a problem where the disassembler would fault if the output
14683 filename could not be generated or if the output file could not be
14686 ----------------------------------------
14687 18 September 2003. Summary of changes for version 20030918:
14690 1) ACPI CA Core Subsystem:
14692 Found and fixed a longstanding problem with the late execution of
14693 the various deferred AML opcodes (such as Operation Regions,
14694 Buffer Fields, Buffers, and Packages). If the name string
14695 specified for the name of the new object placed the object in a
14696 scope other than the current scope, the initialization/execution
14697 of the opcode failed. The solution to this problem was to
14698 implement a mechanism where the late execution of such opcodes
14699 does not attempt to lookup/create the name a second time in an
14700 incorrect scope. This fixes the "region size computed
14701 incorrectly" problem.
14703 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
14704 Global Lock AE_BAD_PARAMETER error.
14706 Fixed several 64-bit issues with prototypes, casting and data
14709 Removed duplicate prototype from acdisasm.h
14711 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
14713 Code and Data Size: Current and previous core subsystem library
14714 sizes are shown below. These are the code and data sizes for the
14715 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14716 these values do not include any ACPI driver or OSPM code. The
14717 debug version of the code includes the debug output trace
14718 mechanism and has a much larger code and data size. Note that
14719 these values will vary depending on the efficiency of the compiler
14720 and the compiler options used during generation.
14724 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14725 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14727 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14728 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14733 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
14734 correct sleep time in seconds.
14736 ----------------------------------------
14737 14 July 2003. Summary of changes for version 20030619:
14739 1) ACPI CA Core Subsystem:
14741 Parse SSDTs in order discovered, as opposed to reverse order
14744 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
14751 Dynamically allocate SDT list (suggested by Andi Kleen)
14753 proc function return value cleanups (Andi Kleen)
14755 Correctly handle NMI watchdog during long stalls (Andrew Morton)
14757 Make it so acpismp=force works (reported by Andrew Morton)
14760 ----------------------------------------
14761 19 June 2003. Summary of changes for version 20030619:
14763 1) ACPI CA Core Subsystem:
14765 Fix To/FromBCD, eliminating the need for an arch-specific #define.
14767 Do not acquire a semaphore in the S5 shutdown path.
14769 Fix ex_digits_needed for 0. (Takayoshi Kochi)
14771 Fix sleep/stall code reversal. (Andi Kleen)
14773 Revert a change having to do with control method calling
14778 acpiphp update (Takayoshi Kochi)
14780 Export acpi_disabled for sonypi (Stelian Pop)
14782 Mention acpismp=force in config help
14784 Re-add acpitable.c and acpismp=force. This improves backwards
14786 compatibility and also cleans up the code to a significant degree.
14788 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
14790 ----------------------------------------
14791 22 May 2003. Summary of changes for version 20030522:
14793 1) ACPI CA Core Subsystem:
14795 Found and fixed a reported problem where an AE_NOT_FOUND error
14796 occurred occasionally during _BST evaluation. This turned out to
14797 be an Owner ID allocation issue where a called method did not get
14798 a new ID assigned to it. Eventually, (after 64k calls), the Owner
14799 ID UINT16 would wraparound so that the ID would be the same as the
14800 caller's and the called method would delete the caller's
14803 Implemented extended error reporting for control methods that are
14804 aborted due to a run-time exception. Output includes the exact
14805 AML instruction that caused the method abort, a dump of the method
14806 locals and arguments at the time of the abort, and a trace of all
14807 nested control method calls.
14809 Modified the interpreter to allow the creation of buffers of zero
14810 length from the AML code. Implemented new code to ensure that no
14811 attempt is made to actually allocate a memory buffer (of length
14812 zero) - instead, a simple buffer object with a NULL buffer pointer
14813 and length zero is created. A warning is no longer issued when
14814 the AML attempts to create a zero-length buffer.
14816 Implemented a workaround for the "leading asterisk issue" in
14817 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
14818 asterisk is automatically removed if present in any HID, UID, or
14819 CID strings. The iASL compiler will still flag this asterisk as
14822 Implemented full support for _CID methods that return a package of
14823 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
14824 now additionally returns a device _CID list if present. This
14825 required a change to the external interface in order to pass an
14826 ACPI_BUFFER object as a parameter since the _CID list is of
14829 Fixed a problem with the new AE_SAME_HANDLER exception where
14830 handler initialization code did not know about this exception.
14832 Code and Data Size: Current and previous core subsystem library
14833 sizes are shown below. These are the code and data sizes for the
14834 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14835 these values do not include any ACPI driver or OSPM code. The
14836 debug version of the code includes the debug output trace
14837 mechanism and has a much larger code and data size. Note that
14838 these values will vary depending on the efficiency of the compiler
14839 and the compiler options used during generation.
14841 Previous Release (20030509):
14842 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14843 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14845 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14846 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14851 Fixed a bug in which we would reinitialize the ACPI interrupt
14852 after it was already working, thus disabling all ACPI and the IRQs
14853 for any other device sharing the interrupt. (Thanks to Stian
14856 Toshiba driver update (John Belmonte)
14858 Return only 0 or 1 for our interrupt handler status (Andrew
14864 Fixed a reported problem where multiple (nested) ElseIf()
14865 statements were not handled correctly by the compiler, resulting
14866 in incorrect warnings and incorrect AML code. This was a problem
14867 in both the ASL parser and the code generator.
14872 Added changes to existing interfaces, new exception codes, and new
14873 text concerning reference count object management versus garbage
14876 ----------------------------------------
14877 09 May 2003. Summary of changes for version 20030509.
14880 1) ACPI CA Core Subsystem:
14882 Changed the subsystem initialization sequence to hold off
14883 installation of address space handlers until the hardware has been
14884 initialized and the system has entered ACPI mode. This is because
14885 the installation of space handlers can cause _REG methods to be
14886 run. Previously, the _REG methods could potentially be run before
14887 ACPI mode was enabled.
14889 Fixed some memory leak issues related to address space handler and
14890 notify handler installation. There were some problems with the
14891 reference count mechanism caused by the fact that the handler
14892 objects are shared across several namespace objects.
14894 Fixed a reported problem where reference counts within the
14895 namespace were not properly updated when named objects created by
14896 method execution were deleted.
14898 Fixed a reported problem where multiple SSDTs caused a deletion
14899 issue during subsystem termination. Restructured the table data
14900 structures to simplify the linked lists and the related code.
14902 Fixed a problem where the table ID associated with secondary
14903 tables (SSDTs) was not being propagated into the namespace objects
14904 created by those tables. This would only present a problem for
14905 tables that are unloaded at run-time, however.
14907 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
14908 type as the length parameter (instead of UINT32).
14910 Solved a long-standing problem where an ALREADY_EXISTS error
14911 appears on various systems. This problem could happen when there
14912 are multiple PCI_Config operation regions under a single PCI root
14913 bus. This doesn't happen very frequently, but there are some
14914 systems that do this in the ASL.
14916 Fixed a reported problem where the internal DeleteNode function
14917 was incorrectly handling the case where a namespace node was the
14918 first in the parent's child list, and had additional peers (not
14919 the only child, but first in the list of children.)
14921 Code and Data Size: Current core subsystem library sizes are shown
14922 below. These are the code and data sizes for the acpica.lib
14923 produced by the Microsoft Visual C++ 6.0 compiler, and these
14924 values do not include any ACPI driver or OSPM code. The debug
14925 version of the code includes the debug output trace mechanism and
14926 has a much larger code and data size. Note that these values will
14927 vary depending on the efficiency of the compiler and the compiler
14928 options used during generation.
14931 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14932 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14934 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14935 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14940 Allow ":" in OS override string (Ducrot Bruno)
14942 Kobject fix (Greg KH)
14945 3 iASL Compiler/Disassembler:
14947 Fixed a problem in the generation of the C source code files (AML
14948 is emitted in C source statements for BIOS inclusion) where the
14949 Ascii dump that appears within a C comment at the end of each line
14950 could cause a compile time error if the AML sequence happens to
14951 have an open comment or close comment sequence embedded.
14954 ----------------------------------------
14955 24 April 2003. Summary of changes for version 20030424.
14958 1) ACPI CA Core Subsystem:
14960 Support for big-endian systems has been implemented. Most of the
14961 support has been invisibly added behind big-endian versions of the
14962 ACPI_MOVE_* macros.
14964 Fixed a problem in AcpiHwDisableGpeBlock() and
14965 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
14966 low level hardware write routine. The offset parameter was
14967 actually eliminated from the low level read/write routines because
14968 they had become obsolete.
14970 Fixed a problem where a handler object was deleted twice during
14971 the removal of a fixed event handler.
14976 A fix for SMP systems with link devices was contributed by
14980 (2.5) Return whether we handled the interrupt in our IRQ handler.
14981 (Linux ISRs no longer return void, so we can propagate the handler
14982 return value from the ACPI CA core back to the OS.)
14988 The ACPI CA Programmer Reference has been updated to reflect new
14989 interfaces and changes to existing interfaces.
14991 ----------------------------------------
14992 28 March 2003. Summary of changes for version 20030328.
14994 1) ACPI CA Core Subsystem:
14996 The GPE Block Device support has been completed. New interfaces
14997 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
14998 interfaces (enable, disable, clear, getstatus) have been split
14999 into separate interfaces for Fixed Events and General Purpose
15000 Events (GPEs) in order to support GPE Block Devices properly.
15002 Fixed a problem where the error message "Failed to acquire
15003 semaphore" would appear during operations on the embedded
15006 Code and Data Size: Current core subsystem library sizes are shown
15007 below. These are the code and data sizes for the acpica.lib
15008 produced by the Microsoft Visual C++ 6.0 compiler, and these
15009 values do not include any ACPI driver or OSPM code. The debug
15010 version of the code includes the debug output trace mechanism and
15011 has a much larger code and data size. Note that these values will
15012 vary depending on the efficiency of the compiler and the compiler
15013 options used during generation.
15016 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
15017 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
15019 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
15020 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
15023 ----------------------------------------
15024 28 February 2003. Summary of changes for version 20030228.
15027 1) ACPI CA Core Subsystem:
15029 The GPE handling and dispatch code has been completely overhauled
15030 in preparation for support of GPE Block Devices (ID ACPI0006).
15031 This affects internal data structures and code only; there should
15032 be no differences visible externally. One new file has been
15035 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
15036 fields that are used to determine the GPE block lengths. The
15037 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
15038 structures are ignored. This is per the ACPI specification but it
15039 isn't very clear. The full 256 Block 0/1 GPEs are now supported
15040 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
15042 In the SCI interrupt handler, removed the read of the PM1_CONTROL
15043 register to look at the SCI_EN bit. On some machines, this read
15044 causes an SMI event and greatly slows down SCI events. (This may
15045 in fact be the cause of slow battery status response on some
15048 Fixed a problem where a store of a NULL string to a package object
15049 could cause the premature deletion of the object. This was seen
15050 during execution of the battery _BIF method on some systems,
15051 resulting in no battery data being returned.
15053 Added AcpiWalkResources interface to simplify parsing of resource
15056 Code and Data Size: Current core subsystem library sizes are shown
15057 below. These are the code and data sizes for the acpica.lib
15058 produced by the Microsoft Visual C++ 6.0 compiler, and these
15059 values do not include any ACPI driver or OSPM code. The debug
15060 version of the code includes the debug output trace mechanism and
15061 has a much larger code and data size. Note that these values will
15062 vary depending on the efficiency of the compiler and the compiler
15063 options used during generation.
15066 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15067 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15069 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
15070 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
15075 S3 fixes (Ole Rohne)
15077 Update ACPI PHP driver with to use new acpi_walk_resource API
15080 Add S4BIOS support (Pavel Machek)
15082 Map in entire table before performing checksum (John Stultz)
15084 Expand the mem= cmdline to allow the specification of reserved and
15085 ACPI DATA blocks (Pavel Machek)
15087 Never use ACPI on VISWS
15089 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
15091 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
15092 causing us to think that some systems support C2 when they really
15095 Do not count processor objects for non-present CPUs (Thanks to
15101 Fixed a problem where ASL include files could not be found and
15104 Added support for the _PDC reserved name.
15107 ----------------------------------------
15108 22 January 2003. Summary of changes for version 20030122.
15111 1) ACPI CA Core Subsystem:
15113 Added a check for constructs of the form: Store (Local0, Local0)
15114 where Local0 is not initialized. Apparently, some BIOS
15115 programmers believe that this is a NOOP. Since this store doesn't
15116 do anything anyway, the new prototype behavior will ignore this
15117 error. This is a case where we can relax the strict checking in
15118 the interpreter in the name of compatibility.
15123 The AcpiSrc Source Conversion Utility has been released with the
15124 Linux package for the first time. This is the utility that is
15125 used to convert the ACPI CA base source code to the Linux version.
15127 (Both) Handle P_BLK lengths shorter than 6 more gracefully
15129 (Both) Move more headers to include/acpi, and delete an unused
15132 (Both) Move drivers/acpi/include directory to include/acpi
15134 (Both) Boot functions don't use cmdline, so don't pass it around
15136 (Both) Remove include of unused header (Adrian Bunk)
15138 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
15140 former now also includes the latter, acpiphp.h only needs the one,
15143 (2.5) Make it possible to select method of bios restoring after S3
15144 resume. [=> no more ugly ifdefs] (Pavel Machek)
15146 (2.5) Make proc write interfaces work (Pavel Machek)
15148 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
15150 (2.5) Break out ACPI Perf code into its own module, under cpufreq
15151 (Dominik Brodowski)
15153 (2.4) S4BIOS support (Ducrot Bruno)
15155 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
15161 Added support to disassemble SSDT and PSDTs.
15163 Implemented support to obtain SSDTs from the Windows registry if
15167 ----------------------------------------
15168 09 January 2003. Summary of changes for version 20030109.
15170 1) ACPI CA Core Subsystem:
15172 Changed the behavior of the internal Buffer-to-String conversion
15173 function. The current ACPI specification states that the contents
15174 of the buffer are "converted to a string of two-character
15175 hexadecimal numbers, each separated by a space". Unfortunately,
15176 this definition is not backwards compatible with existing ACPI 1.0
15177 implementations (although the behavior was not defined in the ACPI
15178 1.0 specification). The new behavior simply copies data from the
15179 buffer to the string until a null character is found or the end of
15180 the buffer is reached. The new String object is always null
15181 terminated. This problem was seen during the generation of _BIF
15182 battery data where incorrect strings were returned for battery
15183 type, etc. This will also require an errata to the ACPI
15186 Renamed all instances of NATIVE_UINT and NATIVE_INT to
15187 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
15189 Copyright in all module headers (both Linux and non-Linux) has be
15192 Code and Data Size: Current core subsystem library sizes are shown
15193 below. These are the code and data sizes for the acpica.lib
15194 produced by the Microsoft Visual C++ 6.0 compiler, and these
15195 values do not include any ACPI driver or OSPM code. The debug
15196 version of the code includes the debug output trace mechanism and
15197 has a much larger code and data size. Note that these values will
15198 vary depending on the efficiency of the compiler and the compiler
15199 options used during generation.
15202 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15203 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15205 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15206 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15211 Fixed an oops on module insertion/removal (Matthew Tippett)
15213 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
15215 (2.5) Replace pr_debug (Randy Dunlap)
15217 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
15219 (Both) Eliminate spawning of thread from timer callback, in favor
15222 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
15224 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
15226 (Both) Add missing statics to button.c (Pavel Machek)
15228 Several changes have been made to the source code translation
15229 utility that generates the Linux Code in order to make the code
15232 All typedefs on structs and unions have been removed in keeping
15233 with the Linux coding style.
15235 Removed the non-Linux SourceSafe module revision number from each
15238 Completed major overhaul of symbols to be lowercase for linux.
15239 Doubled the number of symbols that are lowercase.
15241 Fixed a problem where identifiers within procedure headers and
15242 within quotes were not fully lower cased (they were left with a
15245 Some C macros whose only purpose is to allow the generation of 16-
15246 bit code are now completely removed in the Linux code, increasing
15247 readability and maintainability.
15249 ----------------------------------------
15251 12 December 2002. Summary of changes for version 20021212.
15254 1) ACPI CA Core Subsystem:
15256 Fixed a problem where the creation of a zero-length AML Buffer
15257 would cause a fault.
15259 Fixed a problem where a Buffer object that pointed to a static AML
15260 buffer (in an ACPI table) could inadvertently be deleted, causing
15263 Fixed a problem where a user buffer (passed in to the external
15264 ACPI CA interfaces) could be overwritten if the buffer was too
15265 small to complete the operation, causing memory corruption.
15267 Fixed a problem in the Buffer-to-String conversion code where a
15268 string of length one was always returned, regardless of the size
15269 of the input Buffer object.
15271 Removed the NATIVE_CHAR data type across the entire source due to
15272 lack of need and lack of consistent use.
15274 Code and Data Size: Current core subsystem library sizes are shown
15275 below. These are the code and data sizes for the acpica.lib
15276 produced by the Microsoft Visual C++ 6.0 compiler, and these
15277 values do not include any ACPI driver or OSPM code. The debug
15278 version of the code includes the debug output trace mechanism and
15279 has a much larger code and data size. Note that these values will
15280 vary depending on the efficiency of the compiler and the compiler
15281 options used during generation.
15284 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15285 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15287 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15288 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15291 ----------------------------------------
15292 05 December 2002. Summary of changes for version 20021205.
15294 1) ACPI CA Core Subsystem:
15296 Fixed a problem where a store to a String or Buffer object could
15297 cause corruption of the DSDT if the object type being stored was
15298 the same as the target object type and the length of the object
15299 being stored was equal to or smaller than the original (existing)
15300 target object. This was seen to cause corruption of battery _BIF
15301 buffers if the _BIF method modified the buffer on the fly.
15303 Fixed a problem where an internal error was generated if a control
15304 method invocation was used in an OperationRegion, Buffer, or
15305 Package declaration. This was caused by the deferred parsing of
15306 the control method and thus the deferred creation of the internal
15307 method object. The solution to this problem was to create the
15308 internal method object at the moment the method is encountered in
15309 the first pass - so that subsequent references to the method will
15310 able to obtain the required parameter count and thus properly
15311 parse the method invocation. This problem presented itself as an
15312 AE_AML_INTERNAL during the pass 1 parse phase during table load.
15314 Fixed a problem where the internal String object copy routine did
15315 not always allocate sufficient memory for the target String object
15316 and caused memory corruption. This problem was seen to cause
15317 "Allocation already present in list!" errors as memory allocation
15320 Implemented a new function for the evaluation of namespace objects
15321 that allows the specification of the allowable return object
15322 types. This simplifies a lot of code that checks for a return
15323 object of one or more specific objects returned from the
15324 evaluation (such as _STA, etc.) This may become and external
15325 function if it would be useful to ACPI-related drivers.
15327 Completed another round of prefixing #defines with "ACPI_" for
15330 Completed additional code restructuring to allow more modular
15331 linking for iASL compiler and AcpiExec. Several files were split
15332 creating new files. New files: nsparse.c dsinit.c evgpe.c
15334 Implemented an abort mechanism to terminate an executing control
15335 method via the AML debugger. This feature is useful for debugging
15336 control methods that depend (wait) for specific hardware
15339 Code and Data Size: Current core subsystem library sizes are shown
15340 below. These are the code and data sizes for the acpica.lib
15341 produced by the Microsoft Visual C++ 6.0 compiler, and these
15342 values do not include any ACPI driver or OSPM code. The debug
15343 version of the code includes the debug output trace mechanism and
15344 has a much larger code and data size. Note that these values will
15345 vary depending on the efficiency of the compiler and the compiler
15346 options used during generation.
15349 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15350 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15352 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15353 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15356 2) iASL Compiler/Disassembler
15358 Fixed a compiler code generation problem for "Interrupt" Resource
15359 Descriptors. If specified in the ASL, the optional "Resource
15360 Source Index" and "Resource Source" fields were not inserted into
15361 the correct location within the AML resource descriptor, creating
15362 an invalid descriptor.
15364 Fixed a disassembler problem for "Interrupt" resource descriptors.
15365 The optional "Resource Source Index" and "Resource Source" fields
15369 ----------------------------------------
15370 22 November 2002. Summary of changes for version 20021122.
15373 1) ACPI CA Core Subsystem:
15375 Fixed a reported problem where an object stored to a Method Local
15376 or Arg was not copied to a new object during the store - the
15377 object pointer was simply copied to the Local/Arg. This caused
15378 all subsequent operations on the Local/Arg to also affect the
15379 original source of the store operation.
15381 Fixed a problem where a store operation to a Method Local or Arg
15382 was not completed properly if the Local/Arg contained a reference
15383 (from RefOf) to a named field. The general-purpose store-to-
15384 namespace-node code is now used so that this case is handled
15387 Fixed a problem where the internal object copy routine would cause
15388 a protection fault if the object being copied was a Package and
15389 contained either 1) a NULL package element or 2) a nested sub-
15392 Fixed a problem with the GPE initialization that resulted from an
15393 ambiguity in the ACPI specification. One section of the
15394 specification states that both the address and length of the GPE
15395 block must be zero if the block is not supported. Another section
15396 implies that only the address need be zero if the block is not
15397 supported. The code has been changed so that both the address and
15398 the length must be non-zero to indicate a valid GPE block (i.e.,
15399 if either the address or the length is zero, the GPE block is
15402 Code and Data Size: Current core subsystem library sizes are shown
15403 below. These are the code and data sizes for the acpica.lib
15404 produced by the Microsoft Visual C++ 6.0 compiler, and these
15405 values do not include any ACPI driver or OSPM code. The debug
15406 version of the code includes the debug output trace mechanism and
15407 has a much larger code and data size. Note that these values will
15408 vary depending on the efficiency of the compiler and the compiler
15409 options used during generation.
15412 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15413 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15415 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15416 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15421 Cleaned up EC driver. Exported an external EC read/write
15422 interface. By going through this, other drivers (most notably
15423 sonypi) will be able to serialize access to the EC.
15426 3) iASL Compiler/Disassembler
15428 Implemented support to optionally generate include files for both
15429 ASM and C (the -i switch). This simplifies BIOS development by
15430 automatically creating include files that contain external
15431 declarations for the symbols that are created within the
15433 (optionally generated) ASM and C AML source files.
15436 ----------------------------------------
15437 15 November 2002. Summary of changes for version 20021115.
15439 1) ACPI CA Core Subsystem:
15441 Fixed a memory leak problem where an error during resolution of
15443 method arguments during a method invocation from another method
15444 failed to cleanup properly by deleting all successfully resolved
15447 Fixed a problem where the target of the Index() operator was not
15448 correctly constructed if the source object was a package. This
15449 problem has not been detected because the use of a target operand
15450 with Index() is very rare.
15452 Fixed a problem with the Index() operator where an attempt was
15453 made to delete the operand objects twice.
15455 Fixed a problem where an attempt was made to delete an operand
15456 twice during execution of the CondRefOf() operator if the target
15459 Implemented the first of perhaps several internal create object
15460 functions that create and initialize a specific object type. This
15461 consolidates duplicated code wherever the object is created, thus
15462 shrinking the size of the subsystem.
15464 Implemented improved debug/error messages for errors that occur
15465 during nested method invocations. All executing method pathnames
15466 are displayed (with the error) as the call stack is unwound - thus
15469 Fixed a problem introduced in the 10/02 release that caused
15470 premature deletion of a buffer object if a buffer was used as an
15471 ASL operand where an integer operand is required (Thus causing an
15472 implicit object conversion from Buffer to Integer.) The change in
15473 the 10/02 release was attempting to fix a memory leak (albeit
15476 Code and Data Size: Current core subsystem library sizes are shown
15477 below. These are the code and data sizes for the acpica.lib
15478 produced by the Microsoft Visual C++ 6.0 compiler, and these
15479 values do not include any ACPI driver or OSPM code. The debug
15480 version of the code includes the debug output trace mechanism and
15481 has a much larger code and data size. Note that these values will
15482 vary depending on the efficiency of the compiler and the compiler
15483 options used during generation.
15486 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15487 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15489 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15490 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15495 Changed the implementation of the ACPI semaphores to use down()
15496 instead of down_interruptable(). It is important that the
15497 execution of ACPI control methods not be interrupted by signals.
15498 Methods must run to completion, or the system may be left in an
15499 unknown/unstable state.
15501 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
15505 3) iASL Compiler/Disassembler
15508 Changed the default location of output files. All output files
15509 are now placed in the current directory by default instead of in
15510 the directory of the source file. This change may affect some
15511 existing makefiles, but it brings the behavior of the compiler in
15512 line with other similar tools. The location of the output files
15513 can be overridden with the -p command line switch.
15516 ----------------------------------------
15517 11 November 2002. Summary of changes for version 20021111.
15520 0) ACPI Specification 2.0B is released and is now available at:
15521 http://www.acpi.info/index.html
15524 1) ACPI CA Core Subsystem:
15526 Implemented support for the ACPI 2.0 SMBus Operation Regions.
15527 This includes the early detection and handoff of the request to
15528 the SMBus region handler (avoiding all of the complex field
15529 support code), and support for the bidirectional return packet
15530 from an SMBus write operation. This paves the way for the
15531 development of SMBus drivers in each host operating system.
15533 Fixed a problem where the semaphore WAIT_FOREVER constant was
15534 defined as 32 bits, but must be 16 bits according to the ACPI
15535 specification. This had the side effect of causing ASL
15536 Mutex/Event timeouts even though the ASL code requested a wait
15537 forever. Changed all internal references to the ACPI timeout
15538 parameter to 16 bits to prevent future problems. Changed the name
15539 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
15541 Code and Data Size: Current core subsystem library sizes are shown
15542 below. These are the code and data sizes for the acpica.lib
15543 produced by the Microsoft Visual C++ 6.0 compiler, and these
15544 values do not include any ACPI driver or OSPM code. The debug
15545 version of the code includes the debug output trace mechanism and
15546 has a much larger code and data size. Note that these values will
15547 vary depending on the efficiency of the compiler and the compiler
15548 options used during generation.
15551 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15552 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15554 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15555 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15560 Module loading/unloading fixes (John Cagle)
15563 3) iASL Compiler/Disassembler
15565 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
15567 Implemented support for the disassembly of all SMBus protocol
15568 keywords (SMBQuick, SMBWord, etc.)
15570 ----------------------------------------
15571 01 November 2002. Summary of changes for version 20021101.
15574 1) ACPI CA Core Subsystem:
15576 Fixed a problem where platforms that have a GPE1 block but no GPE0
15577 block were not handled correctly. This resulted in a "GPE
15578 overlap" error message. GPE0 is no longer required.
15580 Removed code added in the previous release that inserted nodes
15581 into the namespace in alphabetical order. This caused some side-
15582 effects on various machines. The root cause of the problem is
15583 still under investigation since in theory, the internal ordering
15584 of the namespace nodes should not matter.
15587 Enhanced error reporting for the case where a named object is not
15588 found during control method execution. The full ACPI namepath
15589 (name reference) of the object that was not found is displayed in
15592 Note: as a result of the overhaul of the namespace object types in
15593 the previous release, the namespace nodes for the predefined
15594 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
15595 instead of ACPI_TYPE_ANY. This simplifies the namespace
15596 management code but may affect code that walks the namespace tree
15597 looking for specific object types.
15599 Code and Data Size: Current core subsystem library sizes are shown
15600 below. These are the code and data sizes for the acpica.lib
15601 produced by the Microsoft Visual C++ 6.0 compiler, and these
15602 values do not include any ACPI driver or OSPM code. The debug
15603 version of the code includes the debug output trace mechanism and
15604 has a much larger code and data size. Note that these values will
15605 vary depending on the efficiency of the compiler and the compiler
15606 options used during generation.
15609 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15610 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15612 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15613 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15618 Fixed a problem introduced in the previous release where the
15619 Processor and Thermal objects were not recognized and installed in
15620 /proc. This was related to the scope type change described above.
15623 3) iASL Compiler/Disassembler
15625 Implemented the -g option to get all of the required ACPI tables
15626 from the registry and save them to files (Windows version of the
15627 compiler only.) The required tables are the FADT, FACS, and DSDT.
15629 Added ACPI table checksum validation during table disassembly in
15630 order to catch corrupted tables.
15633 ----------------------------------------
15634 22 October 2002. Summary of changes for version 20021022.
15636 1) ACPI CA Core Subsystem:
15638 Implemented a restriction on the Scope operator that the target
15639 must already exist in the namespace at the time the operator is
15640 encountered (during table load or method execution). In other
15641 words, forward references are not allowed and Scope() cannot
15642 create a new object. This changes the previous behavior where the
15643 interpreter would create the name if not found. This new behavior
15644 correctly enables the search-to-root algorithm during namespace
15645 lookup of the target name. Because of this upsearch, this fixes
15646 the known Compaq _SB_.OKEC problem and makes both the AML
15647 interpreter and iASL compiler compatible with other ACPI
15650 Completed a major overhaul of the internal ACPI object types for
15651 the ACPI Namespace and the associated operand objects. Many of
15652 these types had become obsolete with the introduction of the two-
15653 pass namespace load. This cleanup simplifies the code and makes
15654 the entire namespace load mechanism much clearer and easier to
15657 Improved debug output for tracking scope opening/closing to help
15658 diagnose scoping issues. The old scope name as well as the new
15659 scope name are displayed. Also improved error messages for
15660 problems with ASL Mutex objects and error messages for GPE
15663 Cleaned up the namespace dump code, removed obsolete code.
15665 All string output (for all namespace/object dumps) now uses the
15666 common ACPI string output procedure which handles escapes properly
15667 and does not emit non-printable characters.
15669 Fixed some issues with constants in the 64-bit version of the
15670 local C library (utclib.c)
15675 EC Driver: No longer attempts to acquire the Global Lock at
15679 3) iASL Compiler/Disassembler
15681 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
15682 2 opcodes outside of a control method. This means that the
15683 "executable" operators (versus the "namespace" operators) cannot
15684 be used at the table level; they can only be used within a control
15687 Implemented the restriction on the Scope() operator where the
15688 target must already exist in the namespace at the time the
15689 operator is encountered (during ASL compilation). In other words,
15690 forward references are not allowed and Scope() cannot create a new
15691 object. This makes the iASL compiler compatible with other ACPI
15692 implementations and makes the Scope() implementation adhere to the
15693 ACPI specification.
15695 Fixed a problem where namepath optimization for the Alias operator
15696 was optimizing the wrong path (of the two namepaths.) This caused
15697 a "Missing alias link" error message.
15699 Fixed a problem where an "unknown reserved name" warning could be
15700 incorrectly generated for names like "_SB" when the trailing
15701 underscore is not used in the original ASL.
15703 Fixed a problem where the reserved name check did not handle
15704 NamePaths with multiple NameSegs correctly. The first nameseg of
15705 the NamePath was examined instead of the last NameSeg.
15708 ----------------------------------------
15710 02 October 2002. Summary of changes for this release.
15713 1) ACPI CA Core Subsystem version 20021002:
15715 Fixed a problem where a store/copy of a string to an existing
15716 string did not always set the string length properly in the String
15719 Fixed a reported problem with the ToString operator where the
15720 behavior was identical to the ToHexString operator instead of just
15721 simply converting a raw buffer to a string data type.
15723 Fixed a problem where CopyObject and the other "explicit"
15724 conversion operators were not updating the internal namespace node
15725 type as part of the store operation.
15727 Fixed a memory leak during implicit source operand conversion
15728 where the original object was not deleted if it was converted to a
15729 new object of a different type.
15731 Enhanced error messages for all problems associated with namespace
15732 lookups. Common procedure generates and prints the lookup name as
15733 well as the formatted status.
15735 Completed implementation of a new design for the Alias support
15736 within the namespace. The existing design did not handle the case
15737 where a new object was assigned to one of the two names due to the
15738 use of an explicit conversion operator, resulting in the two names
15739 pointing to two different objects. The new design simply points
15740 the Alias name to the original name node - not to the object.
15741 This results in a level of indirection that must be handled in the
15742 name resolution mechanism.
15744 Code and Data Size: Current core subsystem library sizes are shown
15745 below. These are the code and data sizes for the acpica.lib
15746 produced by the Microsoft Visual C++ 6.0 compiler, and these
15747 values do not include any ACPI driver or OSPM code. The debug
15748 version of the code includes the debug output trace mechanism and
15749 has a larger code and data size. Note that these values will vary
15750 depending on the efficiency of the compiler and the compiler
15751 options used during generation.
15754 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15755 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15757 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15758 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15763 Initialize thermal driver's timer before it is used. (Knut
15766 Allow handling negative celsius values. (Kochi Takayoshi)
15768 Fix thermal management and make trip points. R/W (Pavel Machek)
15770 Fix /proc/acpi/sleep. (P. Christeas)
15772 IA64 fixes. (David Mosberger)
15774 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
15776 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
15780 3) iASL Compiler/Disassembler
15782 Clarified some warning/error messages.
15785 ----------------------------------------
15786 18 September 2002. Summary of changes for this release.
15789 1) ACPI CA Core Subsystem version 20020918:
15791 Fixed a reported problem with reference chaining (via the Index()
15792 and RefOf() operators) in the ObjectType() and SizeOf() operators.
15793 The definition of these operators includes the dereferencing of
15794 all chained references to return information on the base object.
15796 Fixed a problem with stores to indexed package elements - the
15797 existing code would not complete the store if an "implicit
15798 conversion" was not performed. In other words, if the existing
15799 object (package element) was to be replaced completely, the code
15800 didn't handle this case.
15802 Relaxed typechecking on the ASL "Scope" operator to allow the
15803 target name to refer to an object of type Integer, String, or
15804 Buffer, in addition to the scoping object types (Device,
15805 predefined Scopes, Processor, PowerResource, and ThermalZone.)
15806 This allows existing AML code that has workarounds for a bug in
15807 Windows to function properly. A warning is issued, however. This
15808 affects both the AML interpreter and the iASL compiler. Below is
15809 an example of this type of ASL code:
15815 Fixed some reported problems with 64-bit integer support in the
15816 local implementation of C library functions (clib.c)
15821 Use ACPI fix map region instead of IOAPIC region, since it is
15822 undefined in non-SMP.
15824 Ensure that the SCI has the proper polarity and trigger, even on
15825 systems that do not have an interrupt override entry in the MADT.
15827 2.5 big driver reorganization (Pat Mochel)
15829 Use early table mapping code from acpitable.c (Andi Kleen)
15831 New blacklist entries (Andi Kleen)
15833 Blacklist improvements. Split blacklist code out into a separate
15834 file. Move checking the blacklist to very early. Previously, we
15835 would use ACPI tables, and then halfway through init, check the
15836 blacklist -- too late. Now, it's early enough to completely fall-
15840 3) iASL Compiler/Disassembler version 20020918:
15842 Fixed a problem where the typechecking code didn't know that an
15843 alias could point to a method. In other words, aliases were not
15844 being dereferenced during typechecking.
15847 ----------------------------------------
15848 29 August 2002. Summary of changes for this release.
15850 1) ACPI CA Core Subsystem Version 20020829:
15852 If the target of a Scope() operator already exists, it must be an
15853 object type that actually opens a scope -- such as a Device,
15854 Method, Scope, etc. This is a fatal runtime error. Similar error
15855 check has been added to the iASL compiler also.
15857 Tightened up the namespace load to disallow multiple names in the
15858 same scope. This previously was allowed if both objects were of
15859 the same type. (i.e., a lookup was the same as entering a new
15865 Ensure that the ACPI interrupt has the proper trigger and
15868 local_irq_disable is extraneous. (Matthew Wilcox)
15870 Make "acpi=off" actually do what it says, and not use the ACPI
15871 interpreter *or* the tables.
15873 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
15877 3) iASL Compiler/Disassembler Version 20020829:
15879 Implemented namepath optimization for name declarations. For
15880 example, a declaration like "Method (\_SB_.ABCD)" would get
15881 optimized to "Method (ABCD)" if the declaration is within the
15882 \_SB_ scope. This optimization is in addition to the named
15883 reference path optimization first released in the previous
15884 version. This would seem to complete all possible optimizations
15885 for namepaths within the ASL/AML.
15887 If the target of a Scope() operator already exists, it must be an
15888 object type that actually opens a scope -- such as a Device,
15889 Method, Scope, etc.
15891 Implemented a check and warning for unreachable code in the same
15892 block below a Return() statement.
15894 Fixed a problem where the listing file was not generated if the
15895 compiler aborted if the maximum error count was exceeded (200).
15897 Fixed a problem where the typechecking of method return values was
15898 broken. This includes the check for a return value when the
15899 method is invoked as a TermArg (a return value is expected.)
15901 Fixed a reported problem where EOF conditions during a quoted
15902 string or comment caused a fault.
15905 ----------------------------------------
15906 15 August 2002. Summary of changes for this release.
15908 1) ACPI CA Core Subsystem Version 20020815:
15910 Fixed a reported problem where a Store to a method argument that
15911 contains a reference did not perform the indirect store correctly.
15912 This problem was created during the conversion to the new
15913 reference object model - the indirect store to a method argument
15914 code was not updated to reflect the new model.
15916 Reworked the ACPI mode change code to better conform to ACPI 2.0,
15917 handle corner cases, and improve code legibility (Kochi Takayoshi)
15919 Fixed a problem with the pathname parsing for the carat (^)
15920 prefix. The heavy use of the carat operator by the new namepath
15921 optimization in the iASL compiler uncovered a problem with the AML
15922 interpreter handling of this prefix. In the case where one or
15923 more carats precede a single nameseg, the nameseg was treated as
15924 standalone and the search rule (to root) was inadvertently
15925 applied. This could cause both the iASL compiler and the
15926 interpreter to find the wrong object or to miss the error that
15927 should occur if the object does not exist at that exact pathname.
15929 Found and fixed the problem where the HP Pavilion DSDT would not
15930 load. This was a relatively minor tweak to the table loading code
15931 (a problem caused by the unexpected encounter with a method
15932 invocation not within a control method), but it does not solve the
15933 overall issue of the execution of AML code at the table level.
15934 This investigation is still ongoing.
15936 Code and Data Size: Current core subsystem library sizes are shown
15937 below. These are the code and data sizes for the acpica.lib
15938 produced by the Microsoft Visual C++ 6.0 compiler, and these
15939 values do not include any ACPI driver or OSPM code. The debug
15940 version of the code includes the debug output trace mechanism and
15941 has a larger code and data size. Note that these values will vary
15942 depending on the efficiency of the compiler and the compiler
15943 options used during generation.
15946 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15947 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15949 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15950 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15955 Remove redundant slab.h include (Brad Hards)
15957 Fix several bugs in thermal.c (Herbert Nachtnebel)
15959 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
15961 Change acpi_system_suspend to use updated irq functions (Pavel
15964 Export acpi_get_firmware_table (Matthew Wilcox)
15966 Use proper root proc entry for ACPI (Kochi Takayoshi)
15968 Fix early-boot table parsing (Bjorn Helgaas)
15971 3) iASL Compiler/Disassembler
15973 Reworked the compiler options to make them more consistent and to
15974 use two-letter options where appropriate. We were running out of
15975 sensible letters. This may break some makefiles, so check the
15976 current options list by invoking the compiler with no parameters.
15978 Completed the design and implementation of the ASL namepath
15979 optimization option for the compiler. This option optimizes all
15980 references to named objects to the shortest possible path. The
15981 first attempt tries to utilize a single nameseg (4 characters) and
15982 the "search-to-root" algorithm used by the interpreter. If that
15983 cannot be used (because either the name is not in the search path
15984 or there is a conflict with another object with the same name),
15985 the pathname is optimized using the carat prefix (usually a
15986 shorter string than specifying the entire path from the root.)
15988 Implemented support to obtain the DSDT from the Windows registry
15989 (when the disassembly option is specified with no input file).
15990 Added this code as the implementation for AcpiOsTableOverride in
15991 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
15992 utility) to scan memory for the DSDT to the AcpiOsTableOverride
15993 function in the DOS OSL to make the disassembler truly OS
15996 Implemented a new option to disassemble and compile in one step.
15997 When used without an input filename, this option will grab the
15998 DSDT from the local machine, disassemble it, and compile it in one
16001 Added a warning message for invalid escapes (a backslash followed
16002 by any character other than the allowable escapes). This catches
16003 the quoted string error "\_SB_" (which should be "\\_SB_" ).
16005 Also, there are numerous instances in the ACPI specification where
16008 Added a compiler option to disable all optimizations. This is
16009 basically the "compatibility mode" because by using this option,
16010 the AML code will come out exactly the same as other ASL
16013 Added error messages for incorrectly ordered dependent resource
16014 functions. This includes: missing EndDependentFn macro at end of
16015 dependent resource list, nested dependent function macros (both
16016 start and end), and missing StartDependentFn macro. These are
16017 common errors that should be caught at compile time.
16019 Implemented _OSI support for the disassembler and compiler. _OSI
16020 must be included in the namespace for proper disassembly (because
16021 the disassembler must know the number of arguments.)
16023 Added an "optimization" message type that is optional (off by
16024 default). This message is used for all optimizations - including
16025 constant folding, integer optimization, and namepath optimization.
16027 ----------------------------------------
16028 25 July 2002. Summary of changes for this release.
16031 1) ACPI CA Core Subsystem Version 20020725:
16033 The AML Disassembler has been enhanced to produce compilable ASL
16034 code and has been integrated into the iASL compiler (see below) as
16035 well as the single-step disassembly for the AML debugger and the
16036 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
16037 resource templates and macros are fully supported. The
16038 disassembler has been tested on over 30 different AML files,
16039 producing identical AML when the resulting disassembled ASL file
16040 is recompiled with the same ASL compiler.
16042 Modified the Resource Manager to allow zero interrupts and zero
16043 dma channels during the GetCurrentResources call. This was
16044 causing problems on some platforms.
16046 Added the AcpiOsRedirectOutput interface to the OSL to simplify
16047 output redirection for the AcpiOsPrintf and AcpiOsVprintf
16050 Code and Data Size: Current core subsystem library sizes are shown
16051 below. These are the code and data sizes for the acpica.lib
16052 produced by the Microsoft Visual C++ 6.0 compiler, and these
16053 values do not include any ACPI driver or OSPM code. The debug
16054 version of the code includes the debug output trace mechanism and
16055 has a larger code and data size. Note that these values will vary
16056 depending on the efficiency of the compiler and the compiler
16057 options used during generation.
16060 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16061 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16063 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
16064 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
16069 Fixed a panic in the EC driver (Dominik Brodowski)
16071 Implemented checksum of the R/XSDT itself during Linux table scan
16077 The AML disassembler is integrated into the compiler. The "-d"
16078 option invokes the disassembler to completely disassemble an
16079 input AML file, producing as output a text ASL file with the
16080 extension ".dsl" (to avoid name collisions with existing .asl
16081 source files.) A future enhancement will allow the disassembler
16082 to obtain the BIOS DSDT from the registry under Windows.
16084 Fixed a problem with the VendorShort and VendorLong resource
16085 descriptors where an invalid AML sequence was created.
16087 Implemented a fix for BufferData term in the ASL parser. It was
16088 inadvertently defined twice, allowing invalid syntax to pass and
16089 causing reduction conflicts.
16091 Fixed a problem where the Ones opcode could get converted to a
16092 value of zero if "Ones" was used where a byte, word or dword value
16093 was expected. The 64-bit value is now truncated to the correct
16094 size with the correct value.
16098 ----------------------------------------
16099 02 July 2002. Summary of changes for this release.
16102 1) ACPI CA Core Subsystem Version 20020702:
16104 The Table Manager code has been restructured to add several new
16105 features. Tables that are not required by the core subsystem
16106 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
16107 validated in any way and are returned from AcpiGetFirmwareTable if
16108 requested. The AcpiOsTableOverride interface is now called for
16109 each table that is loaded by the subsystem in order to allow the
16110 host to override any table it chooses. Previously, only the DSDT
16111 could be overridden. Added one new files, tbrsdt.c and
16114 Fixed a problem with the conversion of internal package objects to
16115 external objects (when a package is returned from a control
16116 method.) The return buffer length was set to zero instead of the
16117 proper length of the package object.
16119 Fixed a reported problem with the use of the RefOf and DeRefOf
16120 operators when passing reference arguments to control methods. A
16121 new type of Reference object is used internally for references
16122 produced by the RefOf operator.
16124 Added additional error messages in the Resource Manager to explain
16125 AE_BAD_DATA errors when they occur during resource parsing.
16127 Split the AcpiEnableSubsystem into two primitives to enable a
16128 finer granularity initialization sequence. These two calls should
16129 be called in this order: AcpiEnableSubsystem (flags),
16130 AcpiInitializeObjects (flags). The flags parameter remains the
16136 Updated the ACPI utilities module to understand the new style of
16137 fully resolved package objects that are now returned from the core
16138 subsystem. This eliminates errors of the form:
16140 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
16141 acpi_utils-0430 [145] acpi_evaluate_reference:
16142 Invalid element in package (not a device reference)
16144 The method evaluation utility uses the new buffer allocation
16145 scheme instead of calling AcpiEvaluate Object twice.
16147 Added support for ECDT. This allows the use of the Embedded
16149 Controller before the namespace has been fully initialized, which
16150 is necessary for ACPI 2.0 support, and for some laptops to
16151 initialize properly. (Laptops using ECDT are still rare, so only
16152 limited testing was performed of the added functionality.)
16154 Fixed memory leaks in the EC driver.
16156 Eliminated a brittle code structure in acpi_bus_init().
16158 Eliminated the acpi_evaluate() helper function in utils.c. It is
16159 no longer needed since acpi_evaluate_object can optionally
16160 allocate memory for the return object.
16162 Implemented fix for keyboard hang when getting battery readings on
16163 some systems (Stephen White)
16165 PCI IRQ routing update (Dominik Brodowski)
16167 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
16170 ----------------------------------------
16171 11 June 2002. Summary of changes for this release.
16174 1) ACPI CA Core Subsystem Version 20020611:
16176 Fixed a reported problem where constants such as Zero and One
16177 appearing within _PRT packages were not handled correctly within
16178 the resource manager code. Originally reported against the ASL
16179 compiler because the code generator now optimizes integers to
16180 their minimal AML representation (i.e. AML constants if possible.)
16181 The _PRT code now handles all AML constant opcodes correctly
16182 (Zero, One, Ones, Revision).
16184 Fixed a problem with the Concatenate operator in the AML
16185 interpreter where a buffer result object was incorrectly marked as
16186 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
16188 All package sub-objects are now fully resolved before they are
16189 returned from the external ACPI interfaces. This means that name
16190 strings are resolved to object handles, and constant operators
16191 (Zero, One, Ones, Revision) are resolved to Integers.
16193 Implemented immediate resolution of the AML Constant opcodes
16194 (Zero, One, Ones, Revision) to Integer objects upon detection
16195 within the AML stream. This has simplified and reduced the
16196 generated code size of the subsystem by eliminating about 10
16197 switch statements for these constants (which previously were
16198 contained in Reference objects.) The complicating issues are that
16199 the Zero opcode is used as a "placeholder" for unspecified
16200 optional target operands and stores to constants are defined to be
16203 Code and Data Size: Current core subsystem library sizes are shown
16204 below. These are the code and data sizes for the acpica.lib
16205 produced by the Microsoft Visual C++ 6.0 compiler, and these
16206 values do not include any ACPI driver or OSPM code. The debug
16207 version of the code includes the debug output trace mechanism and
16208 has a larger code and data size. Note that these values will vary
16209 depending on the efficiency of the compiler and the compiler
16210 options used during generation.
16213 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16214 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16216 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16217 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16223 Added preliminary support for obtaining _TRA data for PCI root
16224 bridges (Bjorn Helgaas).
16227 3) iASL Compiler Version X2046:
16229 Fixed a problem where the "_DDN" reserved name was defined to be a
16230 control method with one argument. There are no arguments, and
16231 _DDN does not have to be a control method.
16233 Fixed a problem with the Linux version of the compiler where the
16234 source lines printed with error messages were the wrong lines.
16235 This turned out to be the "LF versus CR/LF" difference between
16236 Windows and Unix. This appears to be the longstanding issue
16237 concerning listing output and error messages.
16239 Fixed a problem with the Linux version of compiler where opcode
16240 names within error messages were wrong. This was caused by a
16241 slight difference in the output of the Flex tool on Linux versus
16244 Fixed a problem with the Linux compiler where the hex output files
16245 contained some garbage data caused by an internal buffer overrun.
16248 ----------------------------------------
16249 17 May 2002. Summary of changes for this release.
16252 1) ACPI CA Core Subsystem Version 20020517:
16254 Implemented a workaround to an BIOS bug discovered on the HP
16255 OmniBook where the FADT revision number and the table size are
16256 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
16257 behavior is to fallback to using only the ACPI 1.0 fields of the
16258 FADT if the table is too small to be a ACPI 2.0 table as claimed
16259 by the revision number. Although this is a BIOS bug, this is a
16260 case where the workaround is simple enough and with no side
16261 effects, so it seemed prudent to add it. A warning message is
16264 Implemented minimum size checks for the fixed-length ACPI tables -
16265 - the FADT and FACS, as well as consistency checks between the
16266 revision number and the table size.
16268 Fixed a reported problem in the table override support where the
16269 new table pointer was incorrectly treated as a physical address
16270 instead of a logical address.
16272 Eliminated the use of the AE_AML_ERROR exception and replaced it
16273 with more descriptive codes.
16275 Fixed a problem where an exception would occur if an ASL Field was
16276 defined with no named Field Units underneath it (used by some
16279 Code and Data Size: Current core subsystem library sizes are shown
16280 below. These are the code and data sizes for the acpica.lib
16281 produced by the Microsoft Visual C++ 6.0 compiler, and these
16282 values do not include any ACPI driver or OSPM code. The debug
16283 version of the code includes the debug output trace mechanism and
16284 has a larger code and data size. Note that these values will vary
16285 depending on the efficiency of the compiler and the compiler
16286 options used during generation.
16289 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16290 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16292 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16293 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16299 Much work done on ACPI init (MADT and PCI IRQ routing support).
16300 (Paul D. and Dominik Brodowski)
16302 Fix PCI IRQ-related panic on boot (Sam Revitch)
16304 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
16306 Fix "MHz" typo (Dominik Brodowski)
16308 Fix RTC year 2000 issue (Dominik Brodowski)
16310 Preclude multiple button proc entries (Eric Brunet)
16312 Moved arch-specific code out of include/platform/aclinux.h
16314 3) iASL Compiler Version X2044:
16316 Implemented error checking for the string used in the EISAID macro
16317 (Usually used in the definition of the _HID object.) The code now
16318 strictly enforces the PnP format - exactly 7 characters, 3
16319 uppercase letters and 4 hex digits.
16321 If a raw string is used in the definition of the _HID object
16322 (instead of the EISAID macro), the string must contain all
16323 alphanumeric characters (e.g., "*PNP0011" is not allowed because
16326 Implemented checking for invalid use of ACPI reserved names for
16327 most of the name creation operators (Name, Device, Event, Mutex,
16328 OperationRegion, PowerResource, Processor, and ThermalZone.)
16329 Previously, this check was only performed for control methods.
16331 Implemented an additional check on the Name operator to emit an
16332 error if a reserved name that must be implemented in ASL as a
16333 control method is used. We know that a reserved name must be a
16334 method if it is defined with input arguments.
16336 The warning emitted when a namespace object reference is not found
16337 during the cross reference phase has been changed into an error.
16338 The "External" directive should be used for names defined in other
16342 4) Tools and Utilities
16344 The 16-bit tools (adump16 and aexec16) have been regenerated and
16347 Fixed a problem with the output of both acpidump and adump16 where
16348 the indentation of closing parentheses and brackets was not
16350 aligned properly with the parent block.
16353 ----------------------------------------
16354 03 May 2002. Summary of changes for this release.
16357 1) ACPI CA Core Subsystem Version 20020503:
16359 Added support a new OSL interface that allows the host operating
16361 system software to override the DSDT found in the firmware -
16362 AcpiOsTableOverride. With this interface, the OSL can examine the
16363 version of the firmware DSDT and replace it with a different one
16366 Added new external interfaces for accessing ACPI registers from
16367 device drivers and other system software - AcpiGetRegister and
16368 AcpiSetRegister. This was simply an externalization of the
16369 existing AcpiHwBitRegister interfaces.
16371 Fixed a regression introduced in the previous build where the
16372 ASL/AML CreateField operator always returned an error,
16373 "destination must be a NS Node".
16375 Extended the maximum time (before failure) to successfully enable
16376 ACPI mode to 3 seconds.
16378 Code and Data Size: Current core subsystem library sizes are shown
16379 below. These are the code and data sizes for the acpica.lib
16380 produced by the Microsoft Visual C++ 6.0 compiler, and these
16381 values do not include any ACPI driver or OSPM code. The debug
16382 version of the code includes the debug output trace mechanism and
16383 has a larger code and data size. Note that these values will vary
16384 depending on the efficiency of the compiler and the compiler
16385 options used during generation.
16388 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16389 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16391 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16392 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16397 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
16398 free. While 3 out of 4 of our in-house systems work fine, the last
16399 one still hangs when testing the LAPIC timer.
16401 Renamed many files in 2.5 kernel release to omit "acpi_" from the
16404 Added warning on boot for Presario 711FR.
16406 Sleep improvements (Pavel Machek)
16408 ACPI can now be built without CONFIG_PCI enabled.
16410 IA64: Fixed memory map functions (JI Lee)
16413 3) iASL Compiler Version X2043:
16415 Added support to allow the compiler to be integrated into the MS
16416 VC++ development environment for one-button compilation of single
16417 files or entire projects -- with error-to-source-line mapping.
16419 Implemented support for compile-time constant folding for the
16420 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
16421 specification. This allows the ASL writer to use expressions
16422 instead of Integer/Buffer/String constants in terms that must
16423 evaluate to constants at compile time and will also simplify the
16424 emitted AML in any such sub-expressions that can be folded
16425 (evaluated at compile-time.) This increases the size of the
16426 compiler significantly because a portion of the ACPI CA AML
16427 interpreter is included within the compiler in order to pre-
16428 evaluate constant expressions.
16431 Fixed a problem with the "Unicode" ASL macro that caused the
16432 compiler to fault. (This macro is used in conjunction with the
16433 _STR reserved name.)
16435 Implemented an AML opcode optimization to use the Zero, One, and
16436 Ones opcodes where possible to further reduce the size of integer
16437 constants and thus reduce the overall size of the generated AML
16440 Implemented error checking for new reserved terms for ACPI version
16443 Implemented the -qr option to display the current list of ACPI
16444 reserved names known to the compiler.
16446 Implemented the -qc option to display the current list of ASL
16447 operators that are allowed within constant expressions and can
16448 therefore be folded at compile time if the operands are constants.
16453 Updated the Programmer's Reference for new interfaces, data types,
16454 and memory allocation model options.
16456 Updated the iASL Compiler User Reference to apply new format and
16457 add information about new features and options.
16459 ----------------------------------------
16460 19 April 2002. Summary of changes for this release.
16462 1) ACPI CA Core Subsystem Version 20020419:
16464 The source code base for the Core Subsystem has been completely
16465 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
16466 versions. The Lint option files used are included in the
16467 /acpi/generate/lint directory.
16469 Implemented enhanced status/error checking across the entire
16470 Hardware manager subsystem. Any hardware errors (reported from
16471 the OSL) are now bubbled up and will abort a running control
16475 Fixed a problem where the per-ACPI-table integer width (32 or 64)
16476 was stored only with control method nodes, causing a fault when
16477 non-control method code was executed during table loading. The
16478 solution implemented uses a global variable to indicate table
16479 width across the entire ACPI subsystem. Therefore, ACPI CA does
16480 not support mixed integer widths across different ACPI tables
16483 Fixed a problem where NULL extended fields (X fields) in an ACPI
16484 2.0 ACPI FADT caused the table load to fail. Although the
16485 existing ACPI specification is a bit fuzzy on this topic, the new
16486 behavior is to fall back on a ACPI 1.0 field if the corresponding
16487 ACPI 2.0 X field is zero (even though the table revision indicates
16488 a full ACPI 2.0 table.) The ACPI specification will be updated to
16489 clarify this issue.
16491 Fixed a problem with the SystemMemory operation region handler
16492 where memory was always accessed byte-wise even if the AML-
16493 specified access width was larger than a byte. This caused
16494 problems on systems with memory-mapped I/O. Memory is now
16495 accessed with the width specified. On systems that do not support
16496 non-aligned transfers, a check is made to guarantee proper address
16497 alignment before proceeding in order to avoid an AML-caused
16498 alignment fault within the kernel.
16501 Fixed a problem with the ExtendedIrq resource where only one byte
16502 of the 4-byte Irq field was extracted.
16504 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
16505 function was out of date and required a rewrite.
16507 Code and Data Size: Current core subsystem library sizes are shown
16508 below. These are the code and data sizes for the acpica.lib
16509 produced by the Microsoft Visual C++ 6.0 compiler, and these
16510 values do not include any ACPI driver or OSPM code. The debug
16511 version of the code includes the debug output trace mechanism and
16512 has a larger code and data size. Note that these values will vary
16513 depending on the efficiency of the compiler and the compiler
16514 options used during generation.
16517 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16518 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16520 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16521 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16526 PCI IRQ routing fixes (Dominik Brodowski)
16529 3) iASL Compiler Version X2042:
16531 Implemented an additional compile-time error check for a field
16532 unit whose size + minimum access width would cause a run-time
16533 access beyond the end-of-region. Previously, only the field size
16534 itself was checked.
16536 The Core subsystem and iASL compiler now share a common parse
16537 object in preparation for compile-time evaluation of the type
16538 3/4/5 ASL operators.
16541 ----------------------------------------
16542 Summary of changes for this release: 03_29_02
16544 1) ACPI CA Core Subsystem Version 20020329:
16546 Implemented support for late evaluation of TermArg operands to
16547 Buffer and Package objects. This allows complex expressions to be
16548 used in the declarations of these object types.
16550 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
16551 1.0, if the field was larger than 32 bits, it was returned as a
16552 buffer - otherwise it was returned as an integer. In ACPI 2.0,
16553 the field is returned as a buffer only if the field is larger than
16554 64 bits. The TableRevision is now considered when making this
16555 conversion to avoid incompatibility with existing ASL code.
16557 Implemented logical addressing for AcpiOsGetRootPointer. This
16558 allows an RSDP with either a logical or physical address. With
16559 this support, the host OS can now override all ACPI tables with
16560 one logical RSDP. Includes implementation of "typed" pointer
16561 support to allow a common data type for both physical and logical
16562 pointers internally. This required a change to the
16563 AcpiOsGetRootPointer interface.
16565 Implemented the use of ACPI 2.0 Generic Address Structures for all
16566 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
16567 mapped I/O for these ACPI features.
16569 Initialization now ignores not only non-required tables (All
16570 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
16571 not validate the table headers of unrecognized tables.
16573 Fixed a problem where a notify handler could only be
16574 installed/removed on an object of type Device. All "notify"
16576 objects are now supported -- Devices, Processor, Power, and
16579 Removed most verbosity from the ACPI_DB_INFO debug level. Only
16580 critical information is returned when this debug level is enabled.
16582 Code and Data Size: Current core subsystem library sizes are shown
16583 below. These are the code and data sizes for the acpica.lib
16584 produced by the Microsoft Visual C++ 6.0 compiler, and these
16585 values do not include any ACPI driver or OSPM code. The debug
16586 version of the code includes the debug output trace mechanism and
16587 has a larger code and data size. Note that these values will vary
16588 depending on the efficiency of the compiler and the compiler
16589 options used during generation.
16592 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16593 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16595 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16596 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16601 The processor driver (acpi_processor.c) now fully supports ACPI
16602 2.0-based processor performance control (e.g. Intel(R)
16603 SpeedStep(TM) technology) Note that older laptops that only have
16604 the Intel "applet" interface are not supported through this. The
16605 'limit' and 'performance' interface (/proc) are fully functional.
16606 [Note that basic policy for controlling performance state
16607 transitions will be included in the next version of ospmd.] The
16608 idle handler was modified to more aggressively use C2, and PIIX4
16609 errata handling underwent a complete overhaul (big thanks to
16610 Dominik Brodowski).
16612 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
16613 based devices in the ACPI namespace are now dynamically bound
16614 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
16615 This allows, among other things, ACPI to resolve bus numbers for
16616 subordinate PCI bridges.
16618 Enhanced PCI IRQ routing to get the proper bus number for _PRT
16619 entries defined underneath PCI bridges.
16621 Added IBM 600E to bad bios list due to invalid _ADR value for
16622 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
16624 In the process of adding full MADT support (e.g. IOAPIC) for IA32
16625 (acpi.c, mpparse.c) -- stay tuned.
16627 Added back visual differentiation between fixed-feature and
16628 control-method buttons in dmesg. Buttons are also subtyped (e.g.
16629 button/power/PWRF) to simplify button identification.
16631 We no longer use -Wno-unused when compiling debug. Please ignore
16632 any "_THIS_MODULE defined but not used" messages.
16634 Can now shut down the system using "magic sysrq" key.
16637 3) iASL Compiler version 2041:
16639 Fixed a problem where conversion errors for hex/octal/decimal
16640 constants were not reported.
16642 Implemented a fix for the General Register template Address field.
16643 This field was 8 bits when it should be 64.
16645 Fixed a problem where errors/warnings were no longer being emitted
16646 within the listing output file.
16648 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
16649 exactly 4 characters, alphanumeric only.
16654 ----------------------------------------
16655 Summary of changes for this release: 03_08_02
16658 1) ACPI CA Core Subsystem Version 20020308:
16660 Fixed a problem with AML Fields where the use of the "AccessAny"
16661 keyword could cause an interpreter error due to attempting to read
16662 or write beyond the end of the parent Operation Region.
16664 Fixed a problem in the SystemMemory Operation Region handler where
16665 an attempt was made to map memory beyond the end of the region.
16666 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
16667 errors on some Linux systems.
16669 Fixed a problem where the interpreter/namespace "search to root"
16670 algorithm was not functioning for some object types. Relaxed the
16671 internal restriction on the search to allow upsearches for all
16672 external object types as well as most internal types.
16677 We now use safe_halt() macro versus individual calls to sti | hlt.
16679 Writing to the processor limit interface should now work. "echo 1"
16680 will increase the limit, 2 will decrease, and 0 will reset to the
16687 Fixed segfault on Linux version.
16690 ----------------------------------------
16691 Summary of changes for this release: 02_25_02
16693 1) ACPI CA Core Subsystem:
16696 Fixed a problem where the GPE bit masks were not initialized
16697 properly, causing erratic GPE behavior.
16699 Implemented limited support for multiple calling conventions. The
16700 code can be generated with either the VPL (variable parameter
16701 list, or "C") convention, or the FPL (fixed parameter list, or
16702 "Pascal") convention. The core subsystem is about 3.4% smaller
16703 when generated with FPL.
16708 Re-add some /proc/acpi/event functionality that was lost during
16711 Resolved issue with /proc events for fixed-feature buttons showing
16712 up as the system device.
16714 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
16716 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
16718 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
16720 Fixed limit interface & usage to fix bugs with passive cooling
16723 Restructured PRT support.
16726 ----------------------------------------
16727 Summary of changes for this label: 02_14_02
16730 1) ACPI CA Core Subsystem:
16732 Implemented support in AcpiLoadTable to allow loading of FACS and
16735 Support for the now-obsolete interim 0.71 64-bit ACPI tables has
16736 been removed. All 64-bit platforms should be migrated to the ACPI
16737 2.0 tables. The actbl71.h header has been removed from the source
16740 All C macros defined within the subsystem have been prefixed with
16741 "ACPI_" to avoid collision with other system include files.
16743 Removed the return value for the two AcpiOsPrint interfaces, since
16744 it is never used and causes lint warnings for ignoring the return
16747 Added error checking to all internal mutex acquire and release
16748 calls. Although a failure from one of these interfaces is
16749 probably a fatal system error, these checks will cause the
16750 immediate abort of the currently executing method or interface.
16752 Fixed a problem where the AcpiSetCurrentResources interface could
16753 fault. This was a side effect of the deployment of the new memory
16756 Fixed a couple of problems with the Global Lock support introduced
16757 in the last major build. The "common" (1.0/2.0) internal FACS was
16758 being overwritten with the FACS signature and clobbering the
16759 Global Lock pointer. Also, the actual firmware FACS was being
16760 unmapped after construction of the "common" FACS, preventing
16761 access to the actual Global Lock field within it. The "common"
16762 internal FACS is no longer installed as an actual ACPI table; it
16763 is used simply as a global.
16765 Code and Data Size: Current core subsystem library sizes are shown
16766 below. These are the code and data sizes for the acpica.lib
16767 produced by the Microsoft Visual C++ 6.0 compiler, and these
16768 values do not include any ACPI driver or OSPM code. The debug
16769 version of the code includes the debug output trace mechanism and
16770 has a larger code and data size. Note that these values will vary
16771 depending on the efficiency of the compiler and the compiler
16772 options used during generation.
16774 Previous Release (02_07_01)
16775 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16776 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16778 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16779 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16784 Updated Linux-specific code for core macro and OSL interface
16785 changes described above.
16787 Improved /proc/acpi/event. It now can be opened only once and has
16788 proper poll functionality.
16790 Fixed and restructured power management (acpi_bus).
16792 Only create /proc "view by type" when devices of that class exist.
16794 Fixed "charging/discharging" bug (and others) in acpi_battery.
16796 Improved thermal zone code.
16799 3) ASL Compiler, version X2039:
16802 Implemented the new compiler restriction on ASL String hex/octal
16803 escapes to non-null, ASCII values. An error results if an invalid
16804 value is used. (This will require an ACPI 2.0 specification
16807 AML object labels that are output to the optional C and ASM source
16808 are now prefixed with both the ACPI table signature and table ID
16809 to help guarantee uniqueness within a large BIOS project.
16812 ----------------------------------------
16813 Summary of changes for this label: 02_01_02
16815 1) ACPI CA Core Subsystem:
16817 ACPI 2.0 support is complete in the entire Core Subsystem and the
16818 ASL compiler. All new ACPI 2.0 operators are implemented and all
16819 other changes for ACPI 2.0 support are complete. With
16820 simultaneous code and data optimizations throughout the subsystem,
16821 ACPI 2.0 support has been implemented with almost no additional
16822 cost in terms of code and data size.
16824 Implemented a new mechanism for allocation of return buffers. If
16825 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
16826 be allocated on behalf of the caller. Consolidated all return
16827 buffer validation and allocation to a common procedure. Return
16828 buffers will be allocated via the primary OSL allocation interface
16829 since it appears that a separate pool is not needed by most users.
16830 If a separate pool is required for these buffers, the caller can
16831 still use the original mechanism and pre-allocate the buffer(s).
16833 Implemented support for string operands within the DerefOf
16836 Restructured the Hardware and Event managers to be table driven,
16837 simplifying the source code and reducing the amount of generated
16840 Split the common read/write low-level ACPI register bitfield
16841 procedure into a separate read and write, simplifying the code
16844 Obsoleted the AcpiOsCallocate OSL interface. This interface was
16845 used only a handful of times and didn't have enough critical mass
16846 for a separate interface. Replaced with a common calloc procedure
16849 Fixed a reported problem with the GPE number mapping mechanism
16850 that allows GPE1 numbers to be non-contiguous with GPE0.
16851 Reorganized the GPE information and shrunk a large array that was
16852 originally large enough to hold info for all possible GPEs (256)
16853 to simply large enough to hold all GPEs up to the largest GPE
16854 number on the machine.
16856 Fixed a reported problem with resource structure alignment on 64-
16859 Changed the AcpiEnableEvent and AcpiDisableEvent external
16860 interfaces to not require any flags for the common case of
16861 enabling/disabling a GPE.
16863 Implemented support to allow a "Notify" on a Processor object.
16865 Most TBDs in comments within the source code have been resolved
16869 Fixed a problem in the interpreter where a standalone parent
16870 prefix (^) was not handled correctly in the interpreter and
16873 Removed obsolete and unnecessary GPE save/restore code.
16875 Implemented Field support in the ASL Load operator. This allows a
16876 table to be loaded from a named field, in addition to loading a
16877 table directly from an Operation Region.
16879 Implemented timeout and handle support in the external Global Lock
16882 Fixed a problem in the AcpiDump utility where pathnames were no
16883 longer being generated correctly during the dump of named objects.
16885 Modified the AML debugger to give a full display of if/while
16886 predicates instead of just one AML opcode at a time. (The
16887 predicate can have several nested ASL statements.) The old method
16888 was confusing during single stepping.
16890 Code and Data Size: Current core subsystem library sizes are shown
16891 below. These are the code and data sizes for the acpica.lib
16892 produced by the Microsoft Visual C++ 6.0 compiler, and these
16893 values do not include any ACPI driver or OSPM code. The debug
16894 version of the code includes the debug output trace mechanism and
16895 has a larger code and data size. Note that these values will vary
16896 depending on the efficiency of the compiler and the compiler
16897 options used during generation.
16899 Previous Release (12_18_01)
16900 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16901 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16903 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16904 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16908 Implemented fix for PIIX reverse throttling errata (Processor
16911 Added new Limit interface (Processor and Thermal drivers)
16913 New thermal policy (Thermal driver)
16915 Many updates to /proc
16917 Battery "low" event support (Battery driver)
16919 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
16921 IA32 - IA64 initialization unification, no longer experimental
16923 Menuconfig options redesigned
16925 3) ASL Compiler, version X2037:
16927 Implemented several new output features to simplify integration of
16928 AML code into firmware: 1) Output the AML in C source code with
16929 labels for each named ASL object. The original ASL source code
16930 is interleaved as C comments. 2) Output the AML in ASM source code
16931 with labels and interleaved ASL source. 3) Output the AML in
16932 raw hex table form, in either C or ASM.
16934 Implemented support for optional string parameters to the
16935 LoadTable operator.
16937 Completed support for embedded escape sequences within string
16938 literals. The compiler now supports all single character escapes
16939 as well as the Octal and Hex escapes. Note: the insertion of a
16940 null byte into a string literal (via the hex/octal escape) causes
16941 the string to be immediately terminated. A warning is issued.
16943 Fixed a problem where incorrect AML was generated for the case
16944 where an ASL namepath consists of a single parent prefix (
16946 ) with no trailing name segments.
16948 The compiler has been successfully generated with a 64-bit C
16954 ----------------------------------------
16955 Summary of changes for this label: 12_18_01
16959 Enhanced blacklist with reason and severity fields. Any table's
16960 signature may now be used to identify a blacklisted system.
16962 Call _PIC control method to inform the firmware which interrupt
16963 model the OS is using. Turn on any disabled link devices.
16965 Cleaned up busmgr /proc error handling (Andreas Dilger)
16967 2) ACPI CA Core Subsystem:
16969 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
16972 Completed implementation of the ACPI 2.0 "Continue",
16973 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
16974 operators. All new ACPI 2.0 operators are now implemented in both
16975 the ASL compiler and the AML interpreter. The only remaining ACPI
16976 2.0 task is support for the String data type in the DerefOf
16977 operator. Fixed a problem with AcquireMutex where the status code
16978 was lost if the caller had to actually wait for the mutex.
16980 Increased the maximum ASL Field size from 64K bits to 4G bits.
16982 Completed implementation of the external Global Lock interfaces --
16983 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
16984 Handler parameters were added.
16986 Completed another pass at removing warnings and issues when
16987 compiling with 64-bit compilers. The code now compiles cleanly
16988 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
16989 add and subtract (diff) macros have changed considerably.
16992 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
16993 64-bit platforms, 32-bits on all others. This type is used
16994 wherever memory allocation and/or the C sizeof() operator is used,
16995 and affects the OSL memory allocation interfaces AcpiOsAllocate
16996 and AcpiOsCallocate.
16998 Implemented sticky user breakpoints in the AML debugger.
17000 Code and Data Size: Current core subsystem library sizes are shown
17001 below. These are the code and data sizes for the acpica.lib
17002 produced by the Microsoft Visual C++ 6.0 compiler, and these
17003 values do not include any ACPI driver or OSPM code. The debug
17004 version of the code includes the debug output trace mechanism and
17005 has a larger code and data size. Note that these values will vary
17006 depending on the efficiency of the compiler and the compiler
17007 options used during generation.
17009 Previous Release (12_05_01)
17010 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
17011 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
17013 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
17014 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
17016 3) ASL Compiler, version X2034:
17018 Now checks for (and generates an error if detected) the use of a
17019 Break or Continue statement without an enclosing While statement.
17022 Successfully generated the compiler with the Intel 64-bit C
17025 ----------------------------------------
17026 Summary of changes for this label: 12_05_01
17028 1) ACPI CA Core Subsystem:
17030 The ACPI 2.0 CopyObject operator is fully implemented. This
17031 operator creates a new copy of an object (and is also used to
17032 bypass the "implicit conversion" mechanism of the Store operator.)
17034 The ACPI 2.0 semantics for the SizeOf operator are fully
17035 implemented. The change is that performing a SizeOf on a
17036 reference object causes an automatic dereference of the object to
17037 tha actual value before the size is evaluated. This behavior was
17038 undefined in ACPI 1.0.
17040 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
17041 have been implemented. The interrupt polarity and mode are now
17044 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
17045 appearing in Package objects were not properly converted to
17046 integers when the internal Package was converted to an external
17047 object (via the AcpiEvaluateObject interface.)
17049 Fixed a problem with the namespace object deletion mechanism for
17050 objects created by control methods. There were two parts to this
17051 problem: 1) Objects created during the initialization phase method
17052 parse were not being deleted, and 2) The object owner ID mechanism
17053 to track objects was broken.
17055 Fixed a problem where the use of the ASL Scope operator within a
17056 control method would result in an invalid opcode exception.
17058 Fixed a problem introduced in the previous label where the buffer
17059 length required for the _PRT structure was not being returned
17062 Code and Data Size: Current core subsystem library sizes are shown
17063 below. These are the code and data sizes for the acpica.lib
17064 produced by the Microsoft Visual C++ 6.0 compiler, and these
17065 values do not include any ACPI driver or OSPM code. The debug
17066 version of the code includes the debug output trace mechanism and
17067 has a larger code and data size. Note that these values will vary
17068 depending on the efficiency of the compiler and the compiler
17069 options used during generation.
17071 Previous Release (11_20_01)
17072 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17073 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17076 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
17077 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
17081 Updated all files to apply cleanly against 2.4.16.
17083 Added basic PCI Interrupt Routing Table (PRT) support for IA32
17084 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
17085 version supports both static and dynamic PRT entries, but dynamic
17086 entries are treated as if they were static (not yet
17087 reconfigurable). Architecture- specific code to use this data is
17088 absent on IA32 but should be available shortly.
17090 Changed the initialization sequence to start the ACPI interpreter
17091 (acpi_init) prior to initialization of the PCI driver (pci_init)
17092 in init/main.c. This ordering is required to support PRT and
17093 facilitate other (future) enhancement. A side effect is that the
17094 ACPI bus driver and certain device drivers can no longer be loaded
17097 Modified the 'make menuconfig' options to allow PCI Interrupt
17098 Routing support to be included without the ACPI Bus and other
17101 3) ASL Compiler, version X2033:
17103 Fixed some issues with the use of the new CopyObject and
17104 DataTableRegion operators. Both are fully functional.
17106 ----------------------------------------
17107 Summary of changes for this label: 11_20_01
17109 20 November 2001. Summary of changes for this release.
17111 1) ACPI CA Core Subsystem:
17113 Updated Index support to match ACPI 2.0 semantics. Storing a
17114 Integer, String, or Buffer to an Index of a Buffer will store only
17115 the least-significant byte of the source to the Indexed buffer
17116 byte. Multiple writes are not performed.
17118 Fixed a problem where the access type used in an AccessAs ASL
17119 operator was not recorded correctly into the field object.
17121 Fixed a problem where ASL Event objects were created in a
17122 signalled state. Events are now created in an unsignalled state.
17124 The internal object cache is now purged after table loading and
17125 initialization to reduce the use of dynamic kernel memory -- on
17126 the assumption that object use is greatest during the parse phase
17127 of the entire table (versus the run-time use of individual control
17130 ACPI 2.0 variable-length packages are now fully operational.
17132 Code and Data Size: Code and Data optimizations have permitted new
17133 feature development with an actual reduction in the library size.
17134 Current core subsystem library sizes are shown below. These are
17135 the code and data sizes for the acpica.lib produced by the
17136 Microsoft Visual C++ 6.0 compiler, and these values do not include
17137 any ACPI driver or OSPM code. The debug version of the code
17138 includes the debug output trace mechanism and has a larger code
17139 and data size. Note that these values will vary depending on the
17140 efficiency of the compiler and the compiler options used during
17143 Previous Release (11_09_01):
17144 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17145 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17148 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17149 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17153 Enhanced the ACPI boot-time initialization code to allow the use
17154 of Local APIC tables for processor enumeration on IA-32, and to
17155 pave the way for a fully MPS-free boot (on SMP systems) in the
17156 near future. This functionality replaces
17157 arch/i386/kernel/acpitables.c, which was introduced in an earlier
17158 2.4.15-preX release. To enable this feature you must add
17159 "acpi_boot=on" to the kernel command line -- see the help entry
17160 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
17163 Restructured the configuration options to allow boot-time table
17164 parsing support without inclusion of the ACPI Interpreter (and
17167 NOTE: This release does not include fixes for the reported events,
17168 power-down, and thermal passive cooling issues (coming soon).
17172 Added additional typechecking for Fields within restricted access
17173 Operation Regions. All fields within EC and CMOS regions must be
17174 declared with ByteAcc. All fields within SMBus regions must be
17175 declared with the BufferAcc access type.
17177 Fixed a problem where the listing file output of control methods
17178 no longer interleaved the actual AML code with the ASL source
17184 ----------------------------------------
17185 Summary of changes for this label: 11_09_01
17187 1) ACPI CA Core Subsystem:
17189 Implemented ACPI 2.0-defined support for writes to fields with a
17190 Buffer, String, or Integer source operand that is smaller than the
17191 target field. In these cases, the source operand is zero-extended
17192 to fill the target field.
17194 Fixed a problem where a Field starting bit offset (within the
17195 parent operation region) was calculated incorrectly if the
17197 alignment of the field differed from the access width. This
17198 affected CreateWordField, CreateDwordField, CreateQwordField, and
17199 possibly other fields that use the "AccessAny" keyword.
17201 Fixed a problem introduced in the 11_02_01 release where indirect
17202 stores through method arguments did not operate correctly.
17206 Implemented boot-time ACPI table parsing support
17207 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
17208 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
17209 legacy BIOS interfaces (e.g. MPS) for the configuration of system
17210 processors, memory, and interrupts during setup_arch(). Note that
17211 this patch does not include the required architecture-specific
17212 changes required to apply this information -- subsequent patches
17213 will be posted for both IA32 and IA64 to achieve this.
17215 Added low-level sleep support for IA32 platforms, courtesy of Pat
17216 Mochel. This allows IA32 systems to transition to/from various
17217 sleeping states (e.g. S1, S3), although the lack of a centralized
17218 driver model and power-manageable drivers will prevent its
17219 (successful) use on most systems.
17221 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
17222 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
17223 tables" option, etc.
17225 Increased the default timeout for the EC driver from 1ms to 10ms
17226 (1000 cycles of 10us) to try to address AE_TIME errors during EC
17229 ----------------------------------------
17230 Summary of changes for this label: 11_02_01
17232 1) ACPI CA Core Subsystem:
17234 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
17235 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
17238 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
17239 changes to support ACPI 2.0 Qword field access. Read/Write
17240 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
17241 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
17242 the value parameter for the address space handler interface is now
17243 an ACPI_INTEGER. OSL implementations of these interfaces must now
17244 handle the case where the Width parameter is 64.
17246 Index Fields: Fixed a problem where unaligned bit assembly and
17247 disassembly for IndexFields was not supported correctly.
17249 Index and Bank Fields: Nested Index and Bank Fields are now
17250 supported. During field access, a check is performed to ensure
17251 that the value written to an Index or Bank register is not out of
17252 the range of the register. The Index (or Bank) register is
17253 written before each access to the field data. Future support will
17254 include allowing individual IndexFields to be wider than the
17255 DataRegister width.
17257 Fields: Fixed a problem where the AML interpreter was incorrectly
17258 attempting to write beyond the end of a Field/OpRegion. This was
17259 a boundary case that occurred when a DWORD field was written to a
17260 BYTE access OpRegion, forcing multiple writes and causing the
17261 interpreter to write one datum too many.
17263 Fields: Fixed a problem with Field/OpRegion access where the
17264 starting bit address of a field was incorrectly calculated if the
17265 current access type was wider than a byte (WordAcc, DwordAcc, or
17268 Fields: Fixed a problem where forward references to individual
17269 FieldUnits (individual Field names within a Field definition) were
17270 not resolved during the AML table load.
17272 Fields: Fixed a problem where forward references from a Field
17273 definition to the parent Operation Region definition were not
17274 resolved during the AML table load.
17276 Fields: Duplicate FieldUnit names within a scope are now detected
17277 during AML table load.
17279 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
17280 returned an incorrect name for the root node.
17282 Code and Data Size: Code and Data optimizations have permitted new
17283 feature development with an actual reduction in the library size.
17284 Current core subsystem library sizes are shown below. These are
17285 the code and data sizes for the acpica.lib produced by the
17286 Microsoft Visual C++ 6.0 compiler, and these values do not include
17287 any ACPI driver or OSPM code. The debug version of the code
17288 includes the debug output trace mechanism and has a larger code
17289 and data size. Note that these values will vary depending on the
17290 efficiency of the compiler and the compiler options used during
17293 Previous Release (10_18_01):
17294 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17295 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17298 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17299 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17303 Improved /proc processor output (Pavel Machek) Re-added
17304 MODULE_LICENSE("GPL") to all modules.
17306 3) ASL Compiler version X2030:
17308 Duplicate FieldUnit names within a scope are now detected and
17313 Programmer Reference updated to reflect OSL and address space
17314 handler interface changes described above.
17316 ----------------------------------------
17317 Summary of changes for this label: 10_18_01
17319 ACPI CA Core Subsystem:
17321 Fixed a problem with the internal object reference count mechanism
17322 that occasionally caused premature object deletion. This resolves
17323 all of the outstanding problem reports where an object is deleted
17324 in the middle of an interpreter evaluation. Although this problem
17325 only showed up in rather obscure cases, the solution to the
17326 problem involved an adjustment of all reference counts involving
17327 objects attached to namespace nodes.
17329 Fixed a problem with Field support in the interpreter where
17330 writing to an aligned field whose length is an exact multiple (2
17331 or greater) of the field access granularity would cause an attempt
17332 to write beyond the end of the field.
17334 The top level AML opcode execution functions within the
17335 interpreter have been renamed with a more meaningful and
17336 consistent naming convention. The modules exmonad.c and
17337 exdyadic.c were eliminated. New modules are exoparg1.c,
17338 exoparg2.c, exoparg3.c, and exoparg6.c.
17340 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
17342 Fixed a problem where the AML debugger was causing some internal
17343 objects to not be deleted during subsystem termination.
17345 Fixed a problem with the external AcpiEvaluateObject interface
17346 where the subsystem would fault if the named object to be
17347 evaluated referred to a constant such as Zero, Ones, etc.
17349 Fixed a problem with IndexFields and BankFields where the
17350 subsystem would fault if the index, data, or bank registers were
17351 not defined in the same scope as the field itself.
17353 Added printf format string checking for compilers that support
17354 this feature. Corrected more than 50 instances of issues with
17355 format specifiers within invocations of ACPI_DEBUG_PRINT
17356 throughout the core subsystem code.
17358 The ASL "Revision" operator now returns the ACPI support level
17359 implemented in the core - the value "2" since the ACPI 2.0 support
17360 is more than 50% implemented.
17362 Enhanced the output of the AML debugger "dump namespace" command
17363 to output in a more human-readable form.
17365 Current core subsystem library code sizes are shown below. These
17367 are the code and data sizes for the acpica.lib produced by the
17368 Microsoft Visual C++ 6.0 compiler, and these values do not include
17369 any ACPI driver or OSPM code. The debug version of the code
17370 includes the full debug trace mechanism -- leading to a much
17372 larger code and data size. Note that these values will vary
17373 depending on the efficiency of the compiler and the compiler
17374 options used during generation.
17376 Previous Label (09_20_01):
17377 Non-Debug Version: 65K Code, 5K Data, 70K Total
17378 Debug Version: 138K Code, 58K Data, 196K Total
17382 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17383 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17387 Implemented a "Bad BIOS Blacklist" to track machines that have
17388 known ASL/AML problems.
17390 Enhanced the /proc interface for the thermal zone driver and added
17391 support for _HOT (the critical suspend trip point). The 'info'
17392 file now includes threshold/policy information, and allows setting
17393 of _SCP (cooling preference) and _TZP (polling frequency) values
17394 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
17395 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
17396 preference to the passive/quiet mode (if supported by the ASL).
17398 Implemented a workaround for a gcc bug that resuted in an OOPs
17399 when loading the control method battery driver.
17401 ----------------------------------------
17402 Summary of changes for this label: 09_20_01
17404 ACPI CA Core Subsystem:
17406 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
17407 modified to allow individual GPE levels to be flagged as wake-
17408 enabled (i.e., these GPEs are to remain enabled when the platform
17411 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
17412 support wake-enabled GPEs. This means that upon entering the
17413 sleep state, all GPEs that are not wake-enabled are disabled.
17414 When leaving the sleep state, these GPEs are re-enabled.
17416 A local double-precision divide/modulo module has been added to
17417 enhance portability to OS kernels where a 64-bit math library is
17418 not available. The new module is "utmath.c".
17420 Several optimizations have been made to reduce the use of CPU
17421 stack. Originally over 2K, the maximum stack usage is now below
17422 2K at 1860 bytes (1.82k)
17424 Fixed a problem with the AcpiGetFirmwareTable interface where the
17425 root table pointer was not mapped into a logical address properly.
17427 Fixed a problem where a NULL pointer was being dereferenced in the
17428 interpreter code for the ASL Notify operator.
17430 Fixed a problem where the use of the ASL Revision operator
17431 returned an error. This operator now returns the current version
17432 of the ACPI CA core subsystem.
17434 Fixed a problem where objects passed as control method parameters
17435 to AcpiEvaluateObject were always deleted at method termination.
17436 However, these objects may end up being stored into the namespace
17437 by the called method. The object reference count mechanism was
17438 applied to these objects instead of a force delete.
17440 Fixed a problem where static strings or buffers (contained in the
17441 AML code) that are declared as package elements within the ASL
17442 code could cause a fault because the interpreter would attempt to
17443 delete them. These objects are now marked with the "static
17444 object" flag to prevent any attempt to delete them.
17446 Implemented an interpreter optimization to use operands directly
17447 from the state object instead of extracting the operands to local
17448 variables. This reduces stack use and code size, and improves
17451 The module exxface.c was eliminated as it was an unnecessary extra
17454 Current core subsystem library code sizes are shown below. These
17455 are the code and data sizes for the acpica.lib produced by the
17456 Microsoft Visual C++ 6.0 compiler, and these values do not include
17457 any ACPI driver or OSPM code. The debug version of the code
17458 includes the full debug trace mechanism -- leading to a much
17459 larger code and data size. Note that these values will vary
17460 depending on the efficiency of the compiler and the compiler
17461 options used during generation.
17463 Non-Debug Version: 65K Code, 5K Data, 70K Total
17464 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
17465 Total (Previously 195K)
17469 Support for ACPI 2.0 64-bit integers has been added. All ACPI
17470 Integer objects are now 64 bits wide
17472 All Acpi data types and structures are now in lower case. Only
17473 Acpi macros are upper case for differentiation.
17477 Changes to the external interfaces as described above.
17479 ----------------------------------------
17480 Summary of changes for this label: 08_31_01
17482 ACPI CA Core Subsystem:
17484 A bug with interpreter implementation of the ASL Divide operator
17485 was found and fixed. The implicit function return value (not the
17486 explicit store operands) was returning the remainder instead of
17487 the quotient. This was a longstanding bug and it fixes several
17488 known outstanding issues on various platforms.
17490 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
17491 been further optimized for size. There are 700 invocations of the
17492 DEBUG_PRINT macro alone, so each optimization reduces the size of
17493 the debug version of the subsystem significantly.
17495 A stack trace mechanism has been implemented. The maximum stack
17496 usage is about 2K on 32-bit platforms. The debugger command "stat
17497 stack" will display the current maximum stack usage.
17499 All public symbols and global variables within the subsystem are
17500 now prefixed with the string "Acpi". This keeps all of the
17501 symbols grouped together in a kernel map, and avoids conflicts
17502 with other kernel subsystems.
17504 Most of the internal fixed lookup tables have been moved into the
17505 code segment via the const operator.
17507 Several enhancements have been made to the interpreter to both
17508 reduce the code size and improve performance.
17510 Current core subsystem library code sizes are shown below. These
17511 are the code and data sizes for the acpica.lib produced by the
17512 Microsoft Visual C++ 6.0 compiler, and these values do not include
17513 any ACPI driver or OSPM code. The debug version of the code
17514 includes the full debug trace mechanism which contains over 700
17515 invocations of the DEBUG_PRINT macro, 500 function entry macro
17516 invocations, and over 900 function exit macro invocations --
17517 leading to a much larger code and data size. Note that these
17518 values will vary depending on the efficiency of the compiler and
17519 the compiler options used during generation.
17521 Non-Debug Version: 64K Code, 5K Data, 69K Total
17522 Debug Version: 137K Code, 58K Data, 195K Total
17526 Implemented wbinvd() macro, pending a kernel-wide definition.
17528 Fixed /proc/acpi/event to handle poll() and short reads.
17530 ASL Compiler, version X2026:
17532 Fixed a problem introduced in the previous label where the AML
17534 code emitted for package objects produced packages with zero
17537 ----------------------------------------
17538 Summary of changes for this label: 08_16_01
17540 ACPI CA Core Subsystem:
17542 The following ACPI 2.0 ASL operators have been implemented in the
17543 AML interpreter (These are already supported by the Intel ASL
17544 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
17545 ToBuffer. Support for 64-bit AML constants is implemented in the
17546 AML parser, debugger, and disassembler.
17548 The internal memory tracking mechanism (leak detection code) has
17549 been upgraded to reduce the memory overhead (a separate tracking
17550 block is no longer allocated for each memory allocation), and now
17551 supports all of the internal object caches.
17553 The data structures and code for the internal object caches have
17554 been coelesced and optimized so that there is a single cache and
17555 memory list data structure and a single group of functions that
17556 implement generic cache management. This has reduced the code
17557 size in both the debug and release versions of the subsystem.
17559 The DEBUG_PRINT macro(s) have been optimized for size and replaced
17560 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
17561 different, because it generates a single call to an internal
17562 function. This results in a savings of about 90 bytes per
17563 invocation, resulting in an overall code and data savings of about
17564 16% in the debug version of the subsystem.
17568 Fixed C3 disk corruption problems and re-enabled C3 on supporting
17571 Integrated low-level sleep code by Patrick Mochel.
17573 Further tweaked source code Linuxization.
17579 Support for ACPI 2.0 variable length packages is fixed/completed.
17581 Fixed a problem where the optional length parameter for the ACPI
17582 2.0 ToString operator.
17584 Fixed multiple extraneous error messages when a syntax error is
17585 detected within the declaration line of a control method.
17587 ----------------------------------------
17588 Summary of changes for this label: 07_17_01
17590 ACPI CA Core Subsystem:
17592 Added a new interface named AcpiGetFirmwareTable to obtain any
17593 ACPI table via the ACPI signature. The interface can be called at
17594 any time during kernel initialization, even before the kernel
17595 virtual memory manager is initialized and paging is enabled. This
17596 allows kernel subsystems to obtain ACPI tables very early, even
17597 before the ACPI CA subsystem is initialized.
17599 Fixed a problem where Fields defined with the AnyAcc attribute
17600 could be resolved to the incorrect address under the following
17601 conditions: 1) the field width is larger than 8 bits and 2) the
17602 parent operation region is not defined on a DWORD boundary.
17604 Fixed a problem where the interpreter is not being locked during
17605 namespace initialization (during execution of the _INI control
17606 methods), causing an error when an attempt is made to release it
17609 ACPI 2.0 support in the AML Interpreter has begun and will be
17610 ongoing throughout the rest of this year. In this label, The Mod
17611 operator is implemented.
17613 Added a new data type to contain full PCI addresses named
17614 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
17615 and Function values.
17619 Enhanced the Linux version of the source code to change most
17620 capitalized ACPI type names to lowercase. For example, all
17621 instances of ACPI_STATUS are changed to acpi_status. This will
17622 result in a large diff, but the change is strictly cosmetic and
17623 aligns the CA code closer to the Linux coding standard.
17627 The interfaces to the PCI configuration space have been changed to
17628 add the PCI Segment number and to split the single 32-bit combined
17629 DeviceFunction field into two 16-bit fields. This was
17630 accomplished by moving the four values that define an address in
17631 PCI configuration space (segment, bus, device, and function) to
17632 the new ACPI_PCI_ID structure.
17634 The changes to the PCI configuration space interfaces led to a
17635 reexamination of the complete set of address space access
17636 interfaces for PCI, I/O, and Memory. The previously existing 18
17637 interfaces have proven difficult to maintain (any small change
17638 must be propagated across at least 6 interfaces) and do not easily
17639 allow for future expansion to 64 bits if necessary. Also, on some
17640 systems, it would not be appropriate to demultiplex the access
17641 width (8, 16, 32,or 64) before calling the OSL if the
17642 corresponding native OS interfaces contain a similar access width
17643 parameter. For these reasons, the 18 address space interfaces
17644 have been replaced by these 6 new ones:
17646 AcpiOsReadPciConfiguration
17647 AcpiOsWritePciConfiguration
17653 Added a new interface named AcpiOsGetRootPointer to allow the OSL
17654 to perform the platform and/or OS-specific actions necessary to
17655 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
17656 interface will simply call down to the CA core to perform the low-
17657 memory search for the table. On IA-64, the RSDP is obtained from
17658 EFI. Migrating this interface to the OSL allows the CA core to
17660 remain OS and platform independent.
17662 Added a new interface named AcpiOsSignal to provide a generic
17663 "function code and pointer" interface for various miscellaneous
17664 signals and notifications that must be made to the host OS. The
17665 first such signals are intended to support the ASL Fatal and
17666 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
17667 interface has been obsoleted.
17669 The definition of the AcpiFormatException interface has been
17670 changed to simplify its use. The caller no longer must supply a
17671 buffer to the call; A pointer to a const string is now returned
17672 directly. This allows the call to be easily used in printf
17673 statements, etc. since the caller does not have to manage a local
17677 ASL Compiler, Version X2025:
17679 The ACPI 2.0 Switch/Case/Default operators have been implemented
17680 and are fully functional. They will work with all ACPI 1.0
17681 interpreters, since the operators are simply translated to If/Else
17684 The ACPI 2.0 ElseIf operator is implemented and will also work
17685 with 1.0 interpreters, for the same reason.
17687 Implemented support for ACPI 2.0 variable-length packages. These
17688 packages have a separate opcode, and their size is determined by
17689 the interpreter at run-time.
17691 Documentation The ACPI CA Programmer Reference has been updated to
17692 reflect the new interfaces and changes to existing interfaces.
17694 ------------------------------------------
17695 Summary of changes for this label: 06_15_01
17697 ACPI CA Core Subsystem:
17699 Fixed a problem where a DWORD-accessed field within a Buffer
17700 object would get its byte address inadvertently rounded down to
17701 the nearest DWORD. Buffers are always Byte-accessible.
17703 ASL Compiler, version X2024:
17705 Fixed a problem where the Switch() operator would either fault or
17706 hang the compiler. Note however, that the AML code for this ACPI
17707 2.0 operator is not yet implemented.
17709 Compiler uses the new AcpiOsGetTimer interface to obtain compile
17712 Implementation of the CreateField operator automatically converts
17713 a reference to a named field within a resource descriptor from a
17714 byte offset to a bit offset if required.
17716 Added some missing named fields from the resource descriptor
17717 support. These are the names that are automatically created by the
17718 compiler to reference fields within a descriptor. They are only
17719 valid at compile time and are not passed through to the AML
17722 Resource descriptor named fields are now typed as Integers and
17723 subject to compile-time typechecking when used in expressions.
17725 ------------------------------------------
17726 Summary of changes for this label: 05_18_01
17728 ACPI CA Core Subsystem:
17730 Fixed a couple of problems in the Field support code where bits
17731 from adjacent fields could be returned along with the proper field
17732 bits. Restructured the field support code to improve performance,
17733 readability and maintainability.
17735 New DEBUG_PRINTP macro automatically inserts the procedure name
17736 into the output, saving hundreds of copies of procedure name
17737 strings within the source, shrinking the memory footprint of the
17738 debug version of the core subsystem.
17740 Source Code Structure:
17742 The source code directory tree was restructured to reflect the
17743 current organization of the component architecture. Some files
17744 and directories have been moved and/or renamed.
17748 Fixed leaking kacpidpc processes.
17750 Fixed queueing event data even when /proc/acpi/event is not
17753 ASL Compiler, version X2020:
17755 Memory allocation performance enhancement - over 24X compile time
17756 improvement on large ASL files. Parse nodes and namestring
17757 buffers are now allocated from a large internal compiler buffer.
17759 The temporary .SRC file is deleted unless the "-s" option is
17762 The "-d" debug output option now sends all output to the .DBG file
17763 instead of the console.
17765 "External" second parameter is now optional
17767 "ElseIf" syntax now properly allows the predicate
17769 Last operand to "Load" now recognized as a Target operand
17771 Debug object can now be used anywhere as a normal object.
17773 ResourceTemplate now returns an object of type BUFFER
17775 EISAID now returns an object of type INTEGER
17777 "Index" now works with a STRING operand
17779 "LoadTable" now accepts optional parameters
17781 "ToString" length parameter is now optional
17783 "Interrupt (ResourceType," parse error fixed.
17785 "Register" with a user-defined region space parse error fixed
17787 Escaped backslash at the end of a string ("\\") scan/parse error
17790 "Revision" is now an object of type INTEGER.
17794 ------------------------------------------
17795 Summary of changes for this label: 05_02_01
17799 /proc/acpi/event now blocks properly.
17801 Removed /proc/sys/acpi. You can still dump your DSDT from
17804 ACPI CA Core Subsystem:
17806 Fixed a problem introduced in the previous label where some of the
17807 "small" resource descriptor types were not recognized.
17809 Improved error messages for the case where an ASL Field is outside
17810 the range of the parent operation region.
17812 ASL Compiler, version X2018:
17815 Added error detection for ASL Fields that extend beyond the length
17816 of the parent operation region (only if the length of the region
17817 is known at compile time.) This includes fields that have a
17818 minimum access width that is smaller than the parent region, and
17819 individual field units that are partially or entirely beyond the
17820 extent of the parent.
17824 ------------------------------------------
17825 Summary of changes for this label: 04_27_01
17827 ACPI CA Core Subsystem:
17829 Fixed a problem where the namespace mutex could be released at the
17830 wrong time during execution of AcpiRemoveAddressSpaceHandler.
17832 Added optional thread ID output for debug traces, to simplify
17833 debugging of multiple threads. Added context switch notification
17834 when the debug code realizes that a different thread is now
17835 executing ACPI code.
17837 Some additional external data types have been prefixed with the
17838 string "ACPI_" for consistency. This may effect existing code.
17839 The data types affected are the external callback typedefs - e.g.,
17841 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
17845 Fixed an issue with the OSL semaphore implementation where a
17846 thread was waking up with an error from receiving a SIGCHLD
17849 Linux version of ACPI CA now uses the system C library for string
17850 manipulation routines instead of a local implementation.
17852 Cleaned up comments and removed TBDs.
17854 ASL Compiler, version X2017:
17856 Enhanced error detection and reporting for all file I/O
17861 Programmer Reference updated to version 1.06.
17865 ------------------------------------------
17866 Summary of changes for this label: 04_13_01
17868 ACPI CA Core Subsystem:
17870 Restructured support for BufferFields and RegionFields.
17871 BankFields support is now fully operational. All known 32-bit
17872 limitations on field sizes have been removed. Both BufferFields
17873 and (Operation) RegionFields are now supported by the same field
17876 Resource support now supports QWORD address and IO resources. The
17877 16/32/64 bit address structures and the Extended IRQ structure
17878 have been changed to properly handle Source Resource strings.
17880 A ThreadId of -1 is now used to indicate a "mutex not acquired"
17881 condition internally and must never be returned by AcpiOsThreadId.
17882 This reserved value was changed from 0 since Unix systems allow a
17887 Driver code reorganized to enhance portability
17889 Added a kernel configuration option to control ACPI_DEBUG
17891 Fixed the EC driver to honor _GLK.
17893 ASL Compiler, version X2016:
17895 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
17896 address space was set to 0, not 0x7f as it should be.
17898 ------------------------------------------
17899 Summary of changes for this label: 03_13_01
17901 ACPI CA Core Subsystem:
17903 During ACPI initialization, the _SB_._INI method is now run if
17906 Notify handler fix - notifies are deferred until the parent method
17907 completes execution. This fixes the "mutex already acquired"
17908 issue seen occasionally.
17910 Part of the "implicit conversion" rules in ACPI 2.0 have been
17911 found to cause compatibility problems with existing ASL/AML. The
17912 convert "result-to-target-type" implementation has been removed
17913 for stores to method Args and Locals. Source operand conversion
17914 is still fully implemented. Possible changes to ACPI 2.0
17915 specification pending.
17917 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
17920 Fix for compiler warnings for 64-bit compiles.
17924 /proc output aligned for easier parsing.
17926 Release-version compile problem fixed.
17928 New kernel configuration options documented in Configure.help.
17930 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
17935 Power resource driver integrated with bus manager.
17937 Fixed kernel fault during active cooling for thermal zones.
17941 The source code tree has been restructured.
17945 ------------------------------------------
17946 Summary of changes for this label: 03_02_01
17948 Linux OS Services Layer (OSL):
17950 Major revision of all Linux-specific code.
17952 Modularized all ACPI-specific drivers.
17954 Added new thermal zone and power resource drivers.
17956 Revamped /proc interface (new functionality is under /proc/acpi).
17958 New kernel configuration options.
17960 Linux known issues:
17962 New kernel configuration options not documented in Configure.help
17966 Module dependencies not currently implemented. If used, they
17967 should be loaded in this order: busmgr, power, ec, system,
17968 processor, battery, ac_adapter, button, thermal.
17970 Modules will not load if CONFIG_MODVERSION is set.
17972 IBM 600E - entering S5 may reboot instead of shutting down.
17974 IBM 600E - Sleep button may generate "Invalid <NULL> context"
17977 Some systems may fail with "execution mutex already acquired"
17980 ACPI CA Core Subsystem:
17982 Added a new OSL Interface, AcpiOsGetThreadId. This was required
17983 for the deadlock detection code. Defined to return a non-zero, 32-
17984 bit thread ID for the currently executing thread. May be a non-
17985 zero constant integer on single-thread systems.
17987 Implemented deadlock detection for internal subsystem mutexes. We
17988 may add conditional compilation for this code (debug only) later.
17990 ASL/AML Mutex object semantics are now fully supported. This
17991 includes multiple acquires/releases by owner and support for the
17993 Mutex SyncLevel parameter.
17995 A new "Force Release" mechanism automatically frees all ASL
17996 Mutexes that have been acquired but not released when a thread
17997 exits the interpreter. This forces conformance to the ACPI spec
17998 ("All mutexes must be released when an invocation exits") and
17999 prevents deadlocked ASL threads. This mechanism can be expanded
18000 (later) to monitor other resource acquisitions if OEM ASL code
18001 continues to misbehave (which it will).
18003 Several new ACPI exception codes have been added for the Mutex
18006 Recursive method calls are now allowed and supported (the ACPI
18007 spec does in fact allow recursive method calls.) The number of
18008 recursive calls is subject to the restrictions imposed by the
18009 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
18012 Implemented support for the SyncLevel parameter for control
18013 methods (ACPI 2.0 feature)
18015 Fixed a deadlock problem when multiple threads attempted to use
18018 Fixed a problem where the string length of a String package
18019 element was not always set in a package returned from
18020 AcpiEvaluateObject.
18022 Fixed a problem where the length of a String package element was
18023 not always included in the length of the overall package returned
18024 from AcpiEvaluateObject.
18026 Added external interfaces (Acpi*) to the ACPI debug memory
18027 manager. This manager keeps a list of all outstanding
18028 allocations, and can therefore detect memory leaks and attempts to
18029 free memory blocks more than once. Useful for code such as the
18030 power manager, etc. May not be appropriate for device drivers.
18031 Performance with the debug code enabled is slow.
18033 The ACPI Global Lock is now an optional hardware element.
18035 ASL Compiler Version X2015:
18037 Integrated changes to allow the compiler to be generated on
18038 multiple platforms.
18040 Linux makefile added to generate the compiler on Linux
18044 All platform-specific headers have been moved to their own
18045 subdirectory, Include/Platform.
18047 New source file added, Interpreter/ammutex.c
18049 New header file, Include/acstruct.h
18053 The programmer reference has been updated for the following new
18054 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
18056 ------------------------------------------
18057 Summary of changes for this label: 02_08_01
18059 Core ACPI CA Subsystem: Fixed a problem where an error was
18060 incorrectly returned if the return resource buffer was larger than
18061 the actual data (in the resource interfaces).
18063 References to named objects within packages are resolved to the
18065 full pathname string before packages are returned directly (via
18066 the AcpiEvaluateObject interface) or indirectly via the resource
18069 Linux OS Services Layer (OSL):
18071 Improved /proc battery interface.
18074 Added C-state debugging output and other miscellaneous fixes.
18076 ASL Compiler Version X2014:
18078 All defined method arguments can now be used as local variables,
18079 including the ones that are not actually passed in as parameters.
18080 The compiler tracks initialization of the arguments and issues an
18081 exception if they are used without prior assignment (just like
18084 The -o option now specifies a filename prefix that is used for all
18085 output files, including the AML output file. Otherwise, the
18086 default behavior is as follows: 1) the AML goes to the file
18087 specified in the DSDT. 2) all other output files use the input
18088 source filename as the base.
18090 ------------------------------------------
18091 Summary of changes for this label: 01_25_01
18093 Core ACPI CA Subsystem: Restructured the implementation of object
18094 store support within the interpreter. This includes support for
18095 the Store operator as well as any ASL operators that include a
18098 Partially implemented support for Implicit Result-to-Target
18099 conversion. This is when a result object is converted on the fly
18100 to the type of an existing target object. Completion of this
18101 support is pending further analysis of the ACPI specification
18102 concerning this matter.
18104 CPU-specific code has been removed from the subsystem (hardware
18107 New Power Management Timer functions added
18109 Linux OS Services Layer (OSL): Moved system state transition code
18110 to the core, fixed it, and modified Linux OSL accordingly.
18112 Fixed C2 and C3 latency calculations.
18115 We no longer use the compilation date for the version message on
18116 initialization, but retrieve the version from AcpiGetSystemInfo().
18118 Incorporated for fix Sony VAIO machines.
18120 Documentation: The Programmer Reference has been updated and
18124 ASL Compiler: Version X2013: Fixed a problem where the line
18125 numbering and error reporting could get out of sync in the
18126 presence of multiple include files.
18128 ------------------------------------------
18129 Summary of changes for this label: 01_15_01
18131 Core ACPI CA Subsystem:
18133 Implemented support for type conversions in the execution of the
18134 ASL Concatenate operator (The second operand is converted to
18135 match the type of the first operand before concatenation.)
18137 Support for implicit source operand conversion is partially
18138 implemented. The ASL source operand types Integer, Buffer, and
18139 String are freely interchangeable for most ASL operators and are
18140 converted by the interpreter on the fly as required. Implicit
18141 Target operand conversion (where the result is converted to the
18142 target type before storing) is not yet implemented.
18144 Support for 32-bit and 64-bit BCD integers is implemented.
18146 Problem fixed where a field read on an aligned field could cause a
18147 read past the end of the field.
18149 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
18150 does not return a value, but the caller expects one. (The ASL
18151 compiler flags this as a warning.)
18156 1. Static typechecking of all operands is implemented. This
18157 prevents the use of invalid objects (such as using a Package where
18158 an Integer is required) at compile time instead of at interpreter
18160 2. The ASL source line is printed with ALL errors and warnings.
18161 3. Bug fix for source EOF without final linefeed.
18162 4. Debug option is split into a parse trace and a namespace trace.
18163 5. Namespace output option (-n) includes initial values for
18164 integers and strings.
18165 6. Parse-only option added for quick syntax checking.
18166 7. Compiler checks for duplicate ACPI name declarations
18169 1. Relaxed typechecking to allow interchangeability between
18170 strings, integers, and buffers. These types are now converted by
18171 the interpreter at runtime.
18172 2. Compiler reports time taken by each internal subsystem in the
18176 ------------------------------------------
18177 Summary of changes for this label: 12_14_00
18181 This is the first official release of the compiler. Since the
18182 compiler requires elements of the Core Subsystem, this label
18183 synchronizes everything.
18185 ------------------------------------------
18186 Summary of changes for this label: 12_08_00
18189 Fixed a problem where named references within the ASL definition
18190 of both OperationRegions and CreateXXXFields did not work
18191 properly. The symptom was an AE_AML_OPERAND_TYPE during
18192 initialization of the region/field. This is similar (but not
18193 related internally) to the problem that was fixed in the last
18196 Implemented both 32-bit and 64-bit support for the BCD ASL
18197 functions ToBCD and FromBCD.
18199 Updated all legal headers to include "2000" in the copyright
18202 ------------------------------------------
18203 Summary of changes for this label: 12_01_00
18205 Fixed a problem where method invocations within the ASL definition
18206 of both OperationRegions and CreateXXXFields did not work
18207 properly. The symptom was an AE_AML_OPERAND_TYPE during
18208 initialization of the region/field:
18210 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
18211 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
18214 Fixed a problem where operators with more than one nested
18215 subexpression would fail. The symptoms were varied, by mostly
18216 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
18217 problem that has gone unnoticed until now.
18219 Subtract (Add (1,2), Multiply (3,4))
18221 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
18222 previous build (The prefix part of a relative path was handled
18225 Fixed a problem where Operation Region initialization failed if
18226 the operation region name was a "namepath" instead of a simple
18227 "nameseg". Symptom was an AE_NO_OPERAND error.
18229 Fixed a problem where an assignment to a local variable via the
18230 indirect RefOf mechanism only worked for the first such
18231 assignment. Subsequent assignments were ignored.
18233 ------------------------------------------
18234 Summary of changes for this label: 11_15_00
18236 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
18237 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
18238 the AML interpreter does NOT have support for the new 2.0 ASL
18239 grammar terms at this time.
18241 All ACPI hardware access is via the GAS structures in the ACPI 2.0
18244 All physical memory addresses across all platforms are now 64 bits
18245 wide. Logical address width remains dependent on the platform
18248 AcpiOsMapMemory interface changed to a 64-bit physical address.
18250 The AML interpreter integer size is now 64 bits, as per the ACPI
18253 For backwards compatibility with ACPI 1.0, ACPI tables with a
18254 revision number less than 2 use 32-bit integers only.
18256 Fixed a problem where the evaluation of OpRegion operands did not
18257 always resolve them to numbers properly.
18259 ------------------------------------------
18260 Summary of changes for this label: 10_20_00
18262 Fix for CBN_._STA issue. This fix will allow correct access to
18263 CBN_ OpRegions when the _STA returns 0x8.
18265 Support to convert ACPI constants (Ones, Zeros, One) to actual
18266 values before a package object is returned
18268 Fix for method call as predicate to if/while construct causing
18269 incorrect if/while behavior
18271 Fix for Else block package lengths sometimes calculated wrong (if
18274 Fix for Processor object length field, was always zero
18276 Table load abort if FACP sanity check fails
18278 Fix for problem with Scope(name) if name already exists
18280 Warning emitted if a named object referenced cannot be found
18281 (resolved) during method execution.
18287 ------------------------------------------
18288 Summary of changes for this label: 9_29_00
18290 New table initialization interfaces: AcpiInitializeSubsystem no
18291 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
18292 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
18293 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
18296 Note: These interface changes require changes to all existing OSDs
18298 The PCI_Config default address space handler is always installed
18299 at the root namespace object.
18301 -------------------------------------------
18302 Summary of changes for this label: 09_15_00
18304 The new initialization architecture is implemented. New
18305 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
18306 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
18308 (Namespace is automatically loaded when a table is loaded)
18310 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
18311 52 bytes to 32 bytes. There is usually one of these for every
18312 namespace object, so the memory savings is significant.
18314 Implemented just-in-time evaluation of the CreateField operators.
18316 Bug fixes for IA-64 support have been integrated.
18318 Additional code review comments have been implemented
18320 The so-called "third pass parse" has been replaced by a final walk
18321 through the namespace to initialize all operation regions (address
18322 spaces) and fields that have not yet been initialized during the
18323 execution of the various _INI and REG methods.
18325 New file - namespace/nsinit.c
18327 -------------------------------------------
18328 Summary of changes for this label: 09_01_00
18330 Namespace manager data structures have been reworked to change the
18331 primary object from a table to a single object. This has
18332 resulted in dynamic memory savings of 3X within the namespace and
18333 2X overall in the ACPI CA subsystem.
18335 Fixed problem where the call to AcpiEvFindPciRootBuses was
18336 inadvertently left commented out.
18338 Reduced the warning count when generating the source with the GCC
18341 Revision numbers added to each module header showing the
18342 SourceSafe version of the file. Please refer to this version
18343 number when giving us feedback or comments on individual modules.
18345 The main object types within the subsystem have been renamed to
18346 clarify their purpose:
18348 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
18349 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
18350 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
18352 NOTE: no changes to the initialization sequence are included in
18355 -------------------------------------------
18356 Summary of changes for this label: 08_23_00
18358 Fixed problem where TerminateControlMethod was being called
18359 multiple times per method
18361 Fixed debugger problem where single stepping caused a semaphore to
18364 Improved performance through additional parse object caching -
18365 added ACPI_EXTENDED_OP type
18367 -------------------------------------------
18368 Summary of changes for this label: 08_10_00
18370 Parser/Interpreter integration: Eliminated the creation of
18371 complete parse trees for ACPI tables and control methods.
18372 Instead, parse subtrees are created and then deleted as soon as
18373 they are processed (Either entered into the namespace or executed
18374 by the interpreter). This reduces the use of dynamic kernel
18375 memory significantly. (about 10X)
18377 Exception codes broken into classes and renumbered. Be sure to
18378 recompile all code that includes acexcep.h. Hopefully we won't
18379 have to renumber the codes again now that they are split into
18380 classes (environment, programmer, AML code, ACPI table, and
18383 Fixed some additional alignment issues in the Resource Manager
18386 Implemented semaphore tracking in the AcpiExec utility, and fixed
18387 several places where mutexes/semaphores were being unlocked
18388 without a corresponding lock operation. There are no known
18389 semaphore or mutex "leaks" at this time.
18391 Fixed the case where an ASL Return operator is used to return an
18394 -------------------------------------------
18395 Summary of changes for this label: 07_28_00
18397 Fixed a problem with the way addresses were calculated in
18398 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
18399 manifested itself when a Field was created with WordAccess or
18400 DwordAccess, but the field unit defined within the Field was less
18402 than a Word or Dword.
18404 Fixed a problem in AmlDumpOperands() module's loop to pull
18405 operands off of the operand stack to display information. The
18406 problem manifested itself as a TLB error on 64-bit systems when
18407 accessing an operand stack with two or more operands.
18409 Fixed a problem with the PCI configuration space handlers where
18410 context was getting confused between accesses. This required a
18411 change to the generic address space handler and address space
18412 setup definitions. Handlers now get both a global handler context
18413 (this is the one passed in by the user when executing
18414 AcpiInstallAddressSpaceHandler() and a specific region context
18415 that is unique to each region (For example, the _ADR, _SEG and
18416 _BBN values associated with a specific region). The generic
18417 function definitions have changed to the following:
18419 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
18420 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
18421 *HandlerContext, // This used to be void *Context void
18422 *RegionContext); // This is an additional parameter
18424 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
18425 RegionHandle, UINT32 Function, void *HandlerContext, void
18426 **RegionContext); // This used to be **ReturnContext
18428 -------------------------------------------
18429 Summary of changes for this label: 07_21_00
18431 Major file consolidation and rename. All files within the
18432 interpreter have been renamed as well as most header files. This
18433 was done to prevent collisions with existing files in the host
18434 OSs -- filenames such as "config.h" and "global.h" seem to be
18435 quite common. The VC project files have been updated. All
18436 makefiles will require modification.
18438 The parser/interpreter integration continues in Phase 5 with the
18439 implementation of a complete 2-pass parse (the AML is parsed
18440 twice) for each table; This avoids the construction of a huge
18441 parse tree and therefore reduces the amount of dynamic memory
18442 required by the subsystem. Greater use of the parse object cache
18443 means that performance is unaffected.
18445 Many comments from the two code reviews have been rolled in.
18447 The 64-bit alignment support is complete.
18449 -------------------------------------------
18450 Summary of changes for this label: 06_30_00
18452 With a nod and a tip of the hat to the technology of yesteryear,
18453 we've added support in the source code for 80 column output
18454 devices. The code is now mostly constrained to 80 columns or
18455 less to support environments and editors that 1) cannot display
18456 or print more than 80 characters on a single line, and 2) cannot
18457 disable line wrapping.
18459 A major restructuring of the namespace data structure has been
18460 completed. The result is 1) cleaner and more
18461 understandable/maintainable code, and 2) a significant reduction
18462 in the dynamic memory requirement for each named ACPI object
18465 -------------------------------------------
18466 Summary of changes for this label: 06_23_00
18468 Linux support has been added. In order to obtain approval to get
18469 the ACPI CA subsystem into the Linux kernel, we've had to make
18470 quite a few changes to the base subsystem that will affect all
18471 users (all the changes are generic and OS- independent). The
18472 effects of these global changes have been somewhat far reaching.
18473 Files have been merged and/or renamed and interfaces have been
18474 renamed. The major changes are described below.
18476 Osd* interfaces renamed to AcpiOs* to eliminate namespace
18477 pollution/confusion within our target kernels. All OSD
18478 interfaces must be modified to match the new naming convention.
18480 Files merged across the subsystem. A number of the smaller source
18481 and header files have been merged to reduce the file count and
18482 increase the density of the existing files. There are too many
18483 to list here. In general, makefiles that call out individual
18484 files will require rebuilding.
18486 Interpreter files renamed. All interpreter files now have the
18487 prefix am* instead of ie* and is*.
18489 Header files renamed: The acapi.h file is now acpixf.h. The
18490 acpiosd.h file is now acpiosxf.h. We are removing references to
18491 the acronym "API" since it is somewhat windowsy. The new name is
18492 "external interface" or xface or xf in the filenames.j
18495 All manifest constants have been forced to upper case (some were
18496 mixed case.) Also, the string "ACPI_" has been prepended to many
18497 (not all) of the constants, typedefs, and structs.
18499 The globals "DebugLevel" and "DebugLayer" have been renamed
18500 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
18502 All other globals within the subsystem are now prefixed with
18503 "AcpiGbl_" Internal procedures within the subsystem are now
18504 prefixed with "Acpi" (with only a few exceptions). The original
18505 two-letter abbreviation for the subcomponent remains after "Acpi"
18506 - for example, CmCallocate became AcpiCmCallocate.
18508 Added a source code translation/conversion utility. Used to
18509 generate the Linux source code, it can be modified to generate
18510 other types of source as well. Can also be used to cleanup
18511 existing source by removing extraneous spaces and blank lines.
18512 Found in tools/acpisrc/*
18514 OsdUnMapMemory was renamed to OsdUnmapMemory and then
18515 AcpiOsUnmapMemory. (UnMap became Unmap).
18517 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
18518 When set to one, this indicates that the caller wants to use the
18520 semaphore as a mutex, not a counting semaphore. ACPI CA uses
18521 both types. However, implementers of this call may want to use
18522 different OS primitives depending on the type of semaphore
18523 requested. For example, some operating systems provide separate
18525 "mutex" and "semaphore" interfaces - where the mutex interface is
18526 much faster because it doesn't have all the overhead of a full
18527 semaphore implementation.
18529 Fixed a deadlock problem where a method that accesses the PCI
18530 address space can block forever if it is the first access to the
18533 -------------------------------------------
18534 Summary of changes for this label: 06_02_00
18536 Support for environments that cannot handle unaligned data
18537 accesses (e.g. firmware and OS environments devoid of alignment
18538 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
18539 been added (via configurable macros) in these three areas: -
18540 Transfer of data from the raw AML byte stream is done via byte
18541 moves instead of word/dword/qword moves. - External objects are
18542 aligned within the user buffer, including package elements (sub-
18543 objects). - Conversion of name strings to UINT32 Acpi Names is now
18546 The Store operator was modified to mimic Microsoft's
18547 implementation when storing to a Buffer Field.
18549 Added a check of the BM_STS bit before entering C3.
18551 The methods subdirectory has been obsoleted and removed. A new
18552 file, cmeval.c subsumes the functionality.
18554 A 16-bit (DOS) version of AcpiExec has been developed. The
18555 makefile is under the acpiexec directory.