1 ----------------------------------------
2 20 June 2012. Summary of changes for version 20120620:
4 This release is available at https://www.acpica.org/downloads
5 The ACPI 5.0 specification is available at www.acpi.info
7 1) ACPICA Kernel-resident Subsystem:
9 Implemented support to expand the "implicit notify" feature to allow multiple
10 devices to be notified by a single GPE. This feature automatically generates a
11 runtime device notification in the absence of a BIOS-provided GPE control
12 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit notify is
13 provided by ACPICA for Windows compatibility, and is a workaround for BIOS AML
14 code errors. See the description of the AcpiSetupGpeForWake interface in the
15 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
17 Changed some comments and internal function names to simplify and ensure
18 correctness of the Linux code translation. No functional changes.
20 Example Code and Data Size: These are the sizes for the OS-independent
21 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
22 version of the code includes the debug output trace mechanism and has a much
23 larger code and data size.
26 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
27 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
29 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
30 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
33 2) iASL Compiler/Disassembler and Tools:
35 Disassembler: Added support to emit short, commented descriptions for the ACPI
36 predefined names in order to improve the readability of the disassembled
37 output. ACPICA BZ 959. Changes include:
38 1) Emit descriptions for all standard predefined names (_INI, _STA, _PRW,
40 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
41 3) Emit descriptions for the resource descriptor names (_MIN, _LEN, etc.)
43 AcpiSrc: Fixed several long-standing Linux code translation issues. Argument
44 descriptions in function headers are now translated properly to lower case and
45 underscores. ACPICA BZ 961. Also fixes translation problems such as these:
50 local_fADT -> local_FADT
51 execute_oSI -> execute_OSI
53 iASL: Fixed a problem where null bytes were inadvertently emitted into some
56 iASL: Added the existing debug options to the standard help screen. There are
57 no longer two different help screens. ACPICA BZ 957.
59 AcpiHelp: Fixed some typos in the various predefined name descriptions. Also
60 expand some of the descriptions where appropriate.
62 iASL: Fixed the -ot option (display compile times/statistics). Was not working
63 properly for standard output; only worked for the debug file case.
65 ----------------------------------------
66 18 May 2012. Summary of changes for version 20120518:
69 1) ACPICA Core Subsystem:
71 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is defined
72 to block until asynchronous events such as notifies and GPEs have completed.
73 Within ACPICA, it is only called before a notify or GPE handler is
74 removed/uninstalled. It also may be useful for the host OS within related
75 drivers such as the Embedded Controller driver. See the ACPICA reference for
76 additional information. ACPICA BZ 868.
78 ACPI Tables: Added a new error message for a possible overflow failure during
79 the conversion of FADT 32-bit legacy register addresses to internal common 64-
80 bit GAS structure representation. The GAS has a one-byte "bit length" field,
81 thus limiting the register length to 255 bits. ACPICA BZ 953.
83 Example Code and Data Size: These are the sizes for the OS-independent
84 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
85 version of the code includes the debug output trace mechanism and has a much
86 larger code and data size.
89 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
90 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
92 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
93 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
96 2) iASL Compiler/Disassembler and Tools:
98 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL macro.
99 This keyword was added late in the ACPI 5.0 release cycle and was not
100 implemented until now.
102 Disassembler: Added support for Operation Region externals. Adds missing
103 support for operation regions that are defined in another table, and
104 referenced locally via a Field or BankField ASL operator. Now generates the
105 correct External statement.
107 Disassembler: Several additional fixes for the External() statement generation
108 related to some ASL operators. Also, order the External() statements
109 alphabetically in the disassembler output. Fixes the External() generation for
110 the Create* field, Alias, and Scope operators:
111 1) Create* buffer field operators - fix type mismatch warning on disassembly
112 2) Alias - implement missing External support
113 3) Scope - fix to make sure all necessary externals are emitted.
115 iASL: Improved pathname support. For include files, merge the prefix pathname
116 with the file pathname and eliminate unnecessary components. Convert
117 backslashes in all pathnames to forward slashes, for readability. Include file
118 pathname changes affect both #include and Include() type operators.
120 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the end
121 of a valid line by inserting a newline and then returning the EOF during the
122 next call to GetNextLine. Prevents the line from being ignored due to EOF
125 iASL: Implemented some changes to enhance the IDE support (-vi option.) Error
126 and Warning messages are now correctly recognized for both the source code
127 browser and the global error and warning counts.
129 ----------------------------------------
130 20 April 2012. Summary of changes for version 20120420:
133 1) ACPICA Core Subsystem:
135 Implemented support for multiple notify handlers. This change adds support to
136 allow multiple system and device notify handlers on Device, Thermal Zone, and
137 Processor objects. This can simplify the host OS notification implementation.
138 Also re-worked and restructured the entire notify support code to simplify
139 handler installation, handler removal, notify event queuing, and notify
140 dispatch to handler(s). Note: there can still only be two global notify
141 handlers - one for system notifies and one for device notifies. There are no
142 changes to the existing handler install/remove interfaces. Lin Ming, Bob
143 Moore, Rafael Wysocki.
145 Fixed a regression in the package repair code where the object reference
146 count was calculated incorrectly. Regression was introduced in the commit
147 "Support to add Package wrappers".
149 Fixed a couple possible memory leaks in the AML parser, in the error recovery
150 path. Jesper Juhl, Lin Ming.
152 Example Code and Data Size: These are the sizes for the OS-independent
153 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
154 debug version of the code includes the debug output trace mechanism and has a
155 much larger code and data size.
158 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
159 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
161 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
162 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
165 2) iASL Compiler/Disassembler and Tools:
167 iASL: Fixed a problem with the resource descriptor support where the length
168 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
169 included in cumulative descriptor offset, resulting in incorrect values for
170 resource tags within resource descriptors appearing after a StartDependent*
171 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
173 iASL and Preprocessor: Implemented full support for the #line directive to
174 correctly track original source file line numbers through the .i preprocessor
175 output file - for error and warning messages.
177 iASL: Expand the allowable byte constants for address space IDs. Previously,
178 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
179 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
181 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
183 iASL: Add option to completely disable the preprocessor (-Pn).
185 iASL: Now emit all error/warning messages to standard error (stderr) by
186 default (instead of the previous stdout).
188 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch(). Update
189 for resource descriptor offset fix above. Update/cleanup error output
190 routines. Enable and send iASL errors/warnings to an error logfile
191 (error.txt). Send all other iASL output to a logfile (compiler.txt). Fixed
192 several extraneous "unrecognized operator" messages.
194 ----------------------------------------
195 20 March 2012. Summary of changes for version 20120320:
198 1) ACPICA Core Subsystem:
200 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
201 (Going To Sleep) and the _BFS method (Back From Sleep). Windows apparently
202 does not execute these methods, and therefore these methods are often
203 untested. It has been seen on some systems where the execution of these
204 methods causes errors and also prevents the machine from entering S5. It is
205 therefore suggested that host operating systems do not execute these methods
206 by default. In the future, perhaps these methods can be optionally executed
207 based on the age of the system and/or what is the newest version of Windows
208 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState and
209 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
212 Fixed a problem where the length of the local/common FADT was set too early.
213 The local FADT table length cannot be set to the common length until the
214 original length has been examined. There is code that checks the table length
215 and sets various fields appropriately. This can affect older machines with
216 early FADT versions. For example, this can cause inadvertent writes to the
217 CST_CNT register. Julian Anastasov.
219 Fixed a mapping issue related to a physical table override. Use the deferred
220 mapping mechanism for tables loaded via the physical override OSL interface.
221 This allows for early mapping before the virtual memory manager is available.
222 Thomas Renninger, Bob Moore.
224 Enhanced the automatic return-object repair code: Repair a common problem with
225 predefined methods that are defined to return a variable-length Package of
226 sub-objects. If there is only one sub-object, some BIOS ASL code mistakenly
227 simply returns the single object instead of a Package with one sub-object.
228 This new support will repair this error by wrapping a Package object around
229 the original object, creating the correct and expected Package with one sub-
230 object. Names that can be repaired in this manner include: _ALR, _CSD, _HPX,
231 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ 939.
233 Changed the exception code returned for invalid ACPI paths passed as
234 parameters to external interfaces such as AcpiEvaluateObject. Was
235 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
237 Example Code and Data Size: These are the sizes for the OS-independent
238 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
239 version of the code includes the debug output trace mechanism and has a much
240 larger code and data size.
243 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
244 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
246 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
247 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
250 2) iASL Compiler/Disassembler and Tools:
252 iASL: Added the infrastructure and initial implementation of a integrated C-
253 like preprocessor. This will simplify BIOS development process by eliminating
254 the need for a separate preprocessing step during builds. On Windows, it also
255 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
256 features including full #define() macro support are still under development.
257 These preprocessor directives are supported:
270 In addition, these new command line options are supported:
271 -D <symbol> Define symbol for preprocessor use
272 -li Create preprocessed output file (*.i)
273 -P Preprocess only and create preprocessor output file (*.i)
275 Table Compiler: Fixed a problem where the equals operator within an expression
276 did not work properly.
278 Updated iASL to use the current versions of Bison/Flex. Updated the Windows
279 project file to invoke these tools from the standard location. ACPICA BZ 904.
281 Flex for Windows: V2.5.4
282 Bison for Windows: V2.4.1
284 ----------------------------------------
285 15 February 2012. Summary of changes for version 20120215:
288 1) ACPICA Core Subsystem:
290 There have been some major changes to the sleep/wake support code, as
291 described below (a - e).
293 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
294 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
295 AcpiLeaveSleepStatePrep. This allows the host to perform actions between the
296 time the _BFS method is called and the _WAK method is called. NOTE: all hosts
297 must update their wake/resume code or else sleep/wake will not work properly.
300 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the _WAK
301 method. Some machines require that the GPEs are enabled before the _WAK method
302 is executed. Thomas Renninger.
304 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status) bit.
305 Some BIOS code assumes that WAK_STS will be cleared on resume and use it to
306 determine whether the system is rebooting or resuming. Matthew Garrett.
308 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From Sleep) to
309 match the ACPI specification requirement. Rafael Wysocki.
311 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
312 registers within the V5 FADT. This support adds two new files:
313 hardware/hwesleep.c implements the support for the new registers. Moved all
314 sleep/wake external interfaces to hardware/hwxfsleep.c.
317 Added a new OSL interface for ACPI table overrides,
318 AcpiOsPhysicalTableOverride. This interface allows the host to override a
319 table via a physical address, instead of the logical address required by
320 AcpiOsTableOverride. This simplifies the host implementation. Initial
321 implementation by Thomas Renninger. The ACPICA implementation creates a single
322 shared function for table overrides that attempts both a logical and a
325 Expanded the OSL memory read/write interfaces to 64-bit data
326 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
327 transfer support for GAS register structures passed to AcpiRead and AcpiWrite.
329 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a custom
330 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC) model.
331 See the ACPICA reference for details. ACPICA BZ 942. This option removes about
332 10% of the code and 5% of the static data, and the following hardware ACPI
333 features become unavailable:
334 PM Event and Control registers
335 SCI interrupt (and handler)
337 General Purpose Events (GPEs)
340 FACS table (Waking vectors and Global Lock)
342 Updated the unix tarball directory structure to match the ACPICA git source
343 tree. This ensures that the generic unix makefiles work properly (in
344 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ 867.
346 Updated the return value of the _REV predefined method to integer value 5 to
347 reflect ACPI 5.0 support.
349 Moved the external ACPI PM timer interface prototypes to the public acpixf.h
350 file where they belong.
352 Example Code and Data Size: These are the sizes for the OS-independent
353 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
354 version of the code includes the debug output trace mechanism and has a much
355 larger code and data size.
358 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
359 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
361 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
362 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
365 2) iASL Compiler/Disassembler and Tools:
367 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
368 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
369 incorrectly displayed.
371 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
374 ----------------------------------------
375 11 January 2012. Summary of changes for version 20120111:
378 1) ACPICA Core Subsystem:
380 Implemented a new mechanism to allow host device drivers to check for address
381 range conflicts with ACPI Operation Regions. Both SystemMemory and SystemIO
382 address spaces are supported. A new external interface, AcpiCheckAddressRange,
383 allows drivers to check an address range against the ACPI namespace. See the
384 ACPICA reference for additional details. Adds one new file,
385 utilities/utaddress.c. Lin Ming, Bob Moore.
387 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep Control and
388 Status registers, update the ACPI 5.0 flags, and update internal data
389 structures to handle an FADT larger than 256 bytes. The size of the ACPI 5.0
392 Updated all ACPICA copyrights and signons to 2012. Added the 2012 copyright to
393 all module headers and signons, including the standard Linux header. This
394 affects virtually every file in the ACPICA core subsystem, iASL compiler, and
395 all ACPICA utilities.
397 Example Code and Data Size: These are the sizes for the OS-independent
398 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
399 version of the code includes the debug output trace mechanism and has a much
400 larger code and data size.
403 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
404 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
406 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
407 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
410 2) iASL Compiler/Disassembler and Tools:
412 Disassembler: fixed a problem with the automatic resource tag generation
413 support. Fixes a problem where the resource tags are inadvertently not
414 constructed if the table being disassembled contains external references to
415 control methods. Moved the actual construction of the tags to after the final
416 namespace is constructed (after 2nd parse is invoked due to external control
417 method references.) ACPICA BZ 941.
419 Table Compiler: Make all "generic" operators caseless. These are the operators
420 like UINT8, String, etc. Making these caseless improves ease-of-use. ACPICA BZ
423 ----------------------------------------
424 23 November 2011. Summary of changes for version 20111123:
428 This release contains full support for the ACPI 5.0 specification, as
431 Reduced Hardware Support:
432 -------------------------
434 This support allows for ACPI systems without the usual ACPI hardware. This
435 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA will
436 not attempt to initialize or use any of the usual ACPI hardware. Note, when
437 this flag is set, all of the following ACPI hardware is assumed to be not
438 present and is not initialized or accessed:
440 General Purpose Events (GPEs)
441 Fixed Events (PM1a/PM1b and PM Control)
442 Power Management Timer and Console Buttons (power/sleep)
443 Real-time Clock Alarm
445 System Control Interrupt (SCI)
446 The FACS is assumed to be non-existent
451 All new tables and updates to existing tables are fully supported in the
452 ACPICA headers (for use by device drivers), the disassembler, and the iASL
453 Data Table Compiler. ACPI 5.0 defines these new tables:
455 BGRT /* Boot Graphics Resource Table */
456 DRTM /* Dynamic Root of Trust for Measurement table */
457 FPDT /* Firmware Performance Data Table */
458 GTDT /* Generic Timer Description Table */
459 MPST /* Memory Power State Table */
460 PCCT /* Platform Communications Channel Table */
461 PMTT /* Platform Memory Topology Table */
462 RASF /* RAS Feature table */
464 Operation Regions/SpaceIDs:
465 ---------------------------
467 All new operation regions are fully supported by the iASL compiler, the
468 disassembler, and the ACPICA runtime code (for dispatch to region handlers.)
469 The new operation region Space IDs are:
474 Resource Descriptors:
475 ---------------------
477 All new ASL resource descriptors are fully supported by the iASL compiler, the
478 ASL/AML disassembler, and the ACPICA runtime Resource Manager code (including
479 all new predefined resource tags). New descriptors are:
488 ASL/AML Operators, New and Modified:
489 ------------------------------------
491 One new operator is added, the Connection operator, which is used to associate
492 a GeneralPurposeIo or GenericSerialBus resource descriptor with individual
493 field objects within an operation region. Several new protocols are associated
494 with the AccessAs operator. All are fully supported by the iASL compiler,
495 disassembler, and runtime ACPICA AML interpreter:
497 Connection // Declare Field Connection attributes
498 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
499 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes Protocol
500 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
501 RawDataBuffer // Data type for Vendor Data fields
503 Predefined ASL/AML Objects:
504 ---------------------------
506 All new predefined objects/control-methods are supported by the iASL compiler
507 and the ACPICA runtime validation/repair (arguments and return values.) New
508 predefined names include the following:
510 Standard Predefined Names (Objects or Control Methods):
511 _AEI, _CLS, _CPC, _CWS, _DEP,
512 _DLM, _EVT, _GCP, _CRT, _GWS,
513 _HRV, _PRE, _PSE, _SRT, _SUB.
515 Resource Tags (Names used to access individual fields within resource
517 _DBT, _DPL, _DRS, _END, _FLC,
518 _IOR, _LIN, _MOD, _PAR, _PHA,
519 _PIN, _PPI, _POL, _RXL, _SLV,
520 _SPE, _STB, _TXL, _VEN.
522 ACPICA External Interfaces:
523 ---------------------------
525 Several new interfaces have been defined for use by ACPI-related device
526 drivers and other host OS services:
528 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS to
529 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
530 provided by the BIOS. They are intended to be used in conjunction with the
531 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
532 mutual exclusion with the AML code/interpreter.
534 AcpiGetEventResources: Returns the (formatted) resource descriptors as defined
535 by the ACPI 5.0 _AEI object (ACPI Event Information). This object provides
536 resource descriptors associated with hardware-reduced platform events, similar
537 to the AcpiGetCurrentResources interface.
539 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
540 operation regions, information about the Connection() object and any optional
541 length information is passed to the region handler within the Context
544 AcpiBufferToResource: This interface converts a raw AML buffer containing a
545 resource template or resource descriptor to the ACPI_RESOURCE internal format
546 suitable for use by device drivers. Can be used by an operation region handler
547 to convert the Connection() buffer object into a ACPI_RESOURCE.
549 Miscellaneous/Tools/TestSuites:
550 -------------------------------
552 Support for extended _HID names (Four alpha characters instead of three).
553 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
554 Support for ACPI 5.0 features in the ASLTS test suite.
555 Fully updated documentation (ACPICA and iASL reference documents.)
557 ACPI Table Definition Language:
558 -------------------------------
560 Support for this language was implemented and released as a subsystem of the
561 iASL compiler in 2010. (See the iASL compiler User Guide.)
564 Non-ACPI 5.0 changes for this release:
565 --------------------------------------
567 1) ACPICA Core Subsystem:
569 Fix a problem with operation region declarations where a failure can occur if
570 the region name and an argument that evaluates to an object (such as the
571 region address) are in different namespace scopes. Lin Ming, ACPICA BZ 937.
573 Do not abort an ACPI table load if an invalid space ID is found within. This
574 will be caught later if the offending method is executed. ACPICA BZ 925.
576 Fixed an issue with the FFixedHW space ID where the ID was not always
577 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
579 Fixed a problem with the 32-bit generation of the unix-specific OSL
580 (osunixxf.c). Lin Ming, ACPICA BZ 936.
582 Several changes made to enable generation with the GCC 4.6 compiler. ACPICA BZ
585 New error messages: Unsupported I/O requests (not 8/16/32 bit), and Index/Bank
586 field registers out-of-range.
588 2) iASL Compiler/Disassembler and Tools:
590 iASL: Implemented the __PATH__ operator, which returns the full pathname of
591 the current source file.
593 AcpiHelp: Automatically display expanded keyword information for all ASL
596 Debugger: Add "Template" command to disassemble/dump resource template
599 Added a new master script to generate and execute the ASLTS test suite.
600 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
602 iASL: Fix problem with listing generation during processing of the Switch()
603 operator where AML listing was disabled until the entire Switch block was
606 iASL: Improve support for semicolon statement terminators. Fix "invalid
607 character" message for some cases when the semicolon is used. Semicolons are
608 now allowed after every <Term> grammar element. ACPICA BZ 927.
610 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ 923.
612 Disassembler: Fix problem with disassembly of the DataTableRegion operator
613 where an inadvertent "Unhandled deferred opcode" message could be generated.
615 3) Example Code and Data Size
617 These are the sizes for the OS-independent acpica.lib produced by the
618 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
619 includes the debug output trace mechanism and has a much larger code and data
623 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
624 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
626 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
627 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
629 ----------------------------------------
630 22 September 2011. Summary of changes for version 20110922:
634 Support for ACPI 5.0 in ACPICA has been underway for several months and will
635 be released at the same time that ACPI 5.0 is officially released.
637 The ACPI 5.0 specification is on track for release in the next few months.
639 1) ACPICA Core Subsystem:
641 Fixed a problem where the maximum sleep time for the Sleep() operator was
642 intended to be limited to two seconds, but was inadvertently limited to 20
645 Linux and Unix makefiles: Added header file dependencies to ensure correct
646 generation of ACPICA core code and utilities. Also simplified the makefiles
647 considerably through the use of the vpath variable to specify search paths.
650 2) iASL Compiler/Disassembler and Tools:
652 iASL: Implemented support to check the access length for all fields created to
653 access named Resource Descriptor fields. For example, if a resource field is
654 defined to be two bits, a warning is issued if a CreateXxxxField() is used
655 with an incorrect bit length. This is implemented for all current resource
656 descriptor names. ACPICA BZ 930.
658 Disassembler: Fixed a byte ordering problem with the output of 24-bit and 56-
661 iASL: Fixed a couple of issues associated with variable-length package
662 objects. 1) properly handle constants like One, Ones, Zero -- do not make a
663 VAR_PACKAGE when these are used as a package length. 2) Allow the VAR_PACKAGE
664 opcode (in addition to PACKAGE) when validating object types for predefined
667 iASL: Emit statistics for all output files (instead of just the ASL input and
668 AML output). Includes listings, hex files, etc.
670 iASL: Added -G option to the table compiler to allow the compilation of custom
671 ACPI tables. The only part of a table that is required is the standard 36-byte
674 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA headers),
675 which also adds correct 64-bit support. Also, now all output filenames are
676 completely lower case.
678 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
679 loading table files. A warning is issued for any such tables. The only
680 exception is an FADT. This also fixes a possible fault when attempting to load
681 non-AML tables. ACPICA BZ 932.
683 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where a
684 missing table terminator could cause a fault when using the -p option.
686 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
689 3) Example Code and Data Size
691 These are the sizes for the OS-independent acpica.lib produced by the
692 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
693 includes the debug output trace mechanism and has a much larger code and data
696 Previous Release (VC 9.0):
697 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
698 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
699 Current Release (VC 9.0):
700 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
701 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
704 ----------------------------------------
705 23 June 2011. Summary of changes for version 20110623:
707 1) ACPI CA Core Subsystem:
709 Updated the predefined name repair mechanism to not attempt repair of a _TSS
710 return object if a _PSS object is present. We can only sort the _TSS return
711 package if there is no _PSS within the same scope. This is because if _PSS is
712 present, the ACPI specification dictates that the _TSS Power Dissipation field
713 is to be ignored, and therefore some BIOSs leave garbage values in the _TSS
714 Power field(s). In this case, it is best to just return the _TSS package as-
715 is. Reported by, and fixed with assistance from Fenghua Yu.
717 Added an option to globally disable the control method return value validation
718 and repair. This runtime option can be used to disable return value repair if
719 this is causing a problem on a particular machine. Also added an option to
720 AcpiExec (-dr) to set this disable flag.
722 All makefiles and project files: Major changes to improve generation of ACPICA
723 tools. ACPICA BZ 912:
724 Reduce default optimization levels to improve compatibility
725 For Linux, add strict-aliasing=0 for gcc 4
726 Cleanup and simplify use of command line defines
727 Cleanup multithread library support
728 Improve usage messages
730 Linux-specific header: update handling of THREAD_ID and pthread. For the 32-
731 bit case, improve casting to eliminate possible warnings, especially with the
734 Example Code and Data Size: These are the sizes for the OS-independent
735 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
736 version of the code includes the debug output trace mechanism and has a much
737 larger code and data size.
739 Previous Release (VC 9.0):
740 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
741 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
742 Current Release (VC 9.0):
743 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
744 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
746 2) iASL Compiler/Disassembler and Tools:
748 With this release, a new utility named "acpihelp" has been added to the ACPICA
749 package. This utility summarizes the ACPI specification chapters for the ASL
750 and AML languages. It generates under Linux/Unix as well as Windows, and
751 provides the following functionality:
752 Find/display ASL operator(s) -- with description and syntax.
753 Find/display ASL keyword(s) -- with exact spelling and descriptions.
754 Find/display ACPI predefined name(s) -- with description, number
755 of arguments, and the return value data type.
756 Find/display AML opcode name(s) -- with opcode, arguments, and grammar.
757 Decode/display AML opcode -- with opcode name, arguments, and grammar.
759 Service Layers: Make multi-thread support configurable. Conditionally compile
760 the multi-thread support so that threading libraries will not be linked if not
761 necessary. The only tool that requires multi-thread support is AcpiExec.
763 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions of
764 Bison appear to want the interface to yyerror to be a const char * (or at
765 least this is a problem when generating iASL on some systems.) ACPICA BZ 923
768 Tools: Fix for systems where O_BINARY is not defined. Only used for Windows
769 versions of the tools.
771 ----------------------------------------
772 27 May 2011. Summary of changes for version 20110527:
774 1) ACPI CA Core Subsystem:
776 ASL Load() operator: Reinstate most restrictions on the incoming ACPI table
777 signature. Now, only allow SSDT, OEMx, and a null signature. History:
778 1) Originally, we checked the table signature for "SSDT" or "PSDT".
779 (PSDT is now obsolete.)
780 2) We added support for OEMx tables, signature "OEM" plus a fourth
781 "don't care" character.
782 3) Valid tables were encountered with a null signature, so we just
783 gave up on validating the signature, (05/2008).
784 4) We encountered non-AML tables such as the MADT, which caused
785 interpreter errors and kernel faults. So now, we once again allow
786 only SSDT, OEMx, and now, also a null signature. (05/2011).
788 Added the missing _TDL predefined name to the global name list in order to
789 enable validation. Affects both the core ACPICA code and the iASL compiler.
791 Example Code and Data Size: These are the sizes for the OS-independent
792 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
793 version of the code includes the debug output trace mechanism and has a much
794 larger code and data size.
796 Previous Release (VC 9.0):
797 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
798 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
799 Current Release (VC 9.0):
800 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
801 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
803 2) iASL Compiler/Disassembler and Tools:
805 Debugger/AcpiExec: Implemented support for "complex" method arguments on the
806 debugger command line. This adds support beyond simple integers -- including
807 Strings, Buffers, and Packages. Includes support for nested packages.
808 Increased the default command line buffer size to accommodate these arguments.
809 See the ACPICA reference for details and syntax. ACPICA BZ 917.
811 Debugger/AcpiExec: Implemented support for "default" method arguments for the
812 Execute/Debug command. Now, the debugger will always invoke a control method
813 with the required number of arguments -- even if the command line specifies
814 none or insufficient arguments. It uses default integer values for any missing
815 arguments. Also fixes a bug where only six method arguments maximum were
816 supported instead of the required seven.
818 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine and
819 also return status in order to prevent buffer overruns. See the ACPICA
820 reference for details and syntax. ACPICA BZ 921
822 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
823 makefiles to simplify support for the two different but similar parser
824 generators, bison and yacc.
826 Updated the generic unix makefile for gcc 4. The default gcc version is now
827 expected to be 4 or greater, since options specific to gcc 4 are used.
829 ----------------------------------------
830 13 April 2011. Summary of changes for version 20110413:
832 1) ACPI CA Core Subsystem:
834 Implemented support to execute a so-called "orphan" _REG method under the EC
835 device. This change will force the execution of a _REG method underneath the
837 device even if there is no corresponding operation region of type
838 EmbeddedControl. Fixes a problem seen on some machines and apparently is
839 compatible with Windows behavior. ACPICA BZ 875.
841 Added more predefined methods that are eligible for automatic NULL package
842 element removal. This change adds another group of predefined names to the
844 of names that can be repaired by having NULL package elements dynamically
845 removed. This group are those methods that return a single variable-length
846 package containing simple data types such as integers, buffers, strings. This
847 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx, _PSL,
849 and _TZD. ACPICA BZ 914.
851 Split and segregated all internal global lock functions to a new file,
854 Updated internal address SpaceID for DataTable regions. Moved this internal
856 id in preparation for ACPI 5.0 changes that will include some new space IDs.
858 change should not affect user/host code.
860 Example Code and Data Size: These are the sizes for the OS-independent
862 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of
863 the code includes the debug output trace mechanism and has a much larger code
867 Previous Release (VC 9.0):
868 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
869 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
870 Current Release (VC 9.0):
871 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
872 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
874 2) iASL Compiler/Disassembler and Tools:
876 iASL/DTC: Major update for new grammar features. Allow generic data types in
877 custom ACPI tables. Field names are now optional. Any line can be split to
878 multiple lines using the continuation char (\). Large buffers now use line-
879 continuation character(s) and no colon on the continuation lines. See the
881 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob Moore.
883 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return statements.
884 Since the parser stuffs a "zero" as the return value for these statements (due
886 the underlying AML grammar), they were seen as "return with value" by the iASL
887 semantic checking. They are now seen correctly as "null" return statements.
889 iASL: Check if a_REG declaration has a corresponding Operation Region. Adds a
890 check for each _REG to ensure that there is in fact a corresponding operation
891 region declaration in the same scope. If not, the _REG method is not very
893 since it probably won't be executed. ACPICA BZ 915.
895 iASL/DTC: Finish support for expression evaluation. Added a new expression
897 that implements c-style operator precedence and parenthesization. ACPICA
901 Disassembler/DTC: Remove support for () and <> style comments in data tables.
903 that DTC has full expression support, we don't want to have comment strings
905 start with a parentheses or a less-than symbol. Now, only the standard /* and
907 comments are supported, as well as the bracket [] comments.
909 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
911 headers in the acpidump file. Update the header validation to support these
912 tables. Problem introduced in previous AcpiXtract version in the change to
913 support "wrong checksum" error messages emitted by acpidump utility.
915 iASL: Add a * option to generate all template files (as a synonym for ALL) as
917 "iasl -T *" or "iasl -T ALL".
919 iASL/DTC: Do not abort compiler on fatal errors. We do not want to completely
920 abort the compiler on "fatal" errors, simply should abort the current compile.
921 This allows multiple compiles with a single (possibly wildcard) compiler
924 ----------------------------------------
925 16 March 2011. Summary of changes for version 20110316:
927 1) ACPI CA Core Subsystem:
929 Fixed a problem caused by a _PRW method appearing at the namespace root scope
930 during the setup of wake GPEs. A fault could occur if a _PRW directly under
932 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
934 Implemented support for "spurious" Global Lock interrupts. On some systems, a
935 global lock interrupt can occur without the pending flag being set. Upon a GL
936 interrupt, we now ensure that a thread is actually waiting for the lock before
937 signaling GL availability. Rafael Wysocki, Bob Moore.
939 Example Code and Data Size: These are the sizes for the OS-independent
941 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of
942 the code includes the debug output trace mechanism and has a much larger code
946 Previous Release (VC 9.0):
947 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
948 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
949 Current Release (VC 9.0):
950 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
951 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
953 2) iASL Compiler/Disassembler and Tools:
955 Implemented full support for the "SLIC" ACPI table. Includes support in the
956 header files, disassembler, table compiler, and template generator. Bob Moore,
959 AcpiXtract: Correctly handle embedded comments and messages from AcpiDump.
960 Apparently some or all versions of acpidump will occasionally emit a comment
962 "Wrong checksum", etc., into the dump file. This was causing problems for
963 AcpiXtract. ACPICA BZ 905.
965 iASL: Fix the Linux makefile by removing an inadvertent double file inclusion.
968 AcpiExec: Update installation of operation region handlers. Install one
970 for a user-defined address space. This is used by the ASL test suite (ASLTS).
972 ----------------------------------------
973 11 February 2011. Summary of changes for version 20110211:
975 1) ACPI CA Core Subsystem:
977 Added a mechanism to defer _REG methods for some early-installed handlers.
978 Most user handlers should be installed before call to AcpiEnableSubsystem.
979 However, Event handlers and region handlers should be installed after
980 AcpiInitializeObjects. Override handlers for the "default" regions should be
981 installed early, however. This change executes all _REG methods for the
982 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
983 chicken/egg issues between them. ACPICA BZ 848.
985 Implemented an optimization for GPE detection. This optimization will simply
986 ignore GPE registers that contain no enabled GPEs -- there is no need to
987 read the register since this information is available internally. This
988 becomes more important on machines with a large GPE space. ACPICA bugzilla
989 884. Lin Ming. Suggestion from Joe Liu.
991 Removed all use of the highly unreliable FADT revision field. The revision
992 number in the FADT has been found to be completely unreliable and cannot be
993 trusted. Only the actual table length can be used to infer the version. This
994 change updates the ACPICA core and the disassembler so that both no longer
995 even look at the FADT version and instead depend solely upon the FADT
998 Fix an unresolved name issue for the no-debug and no-error-message source
999 generation cases. The _AcpiModuleName was left undefined in these cases, but
1000 it is actually needed as a parameter to some interfaces. Define
1001 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
1003 Split several large files (makefiles and project files updated)
1004 utglobal.c -> utdecode.c
1005 dbcomds.c -> dbmethod.c dbnames.c
1006 dsopcode.c -> dsargs.c dscontrol.c
1007 dsload.c -> dsload2.c
1008 aslanalyze.c -> aslbtypes.c aslwalks.c
1010 Example Code and Data Size: These are the sizes for the OS-independent
1011 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1012 debug version of the code includes the debug output trace mechanism and has
1013 a much larger code and data size.
1015 Previous Release (VC 9.0):
1016 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
1017 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
1018 Current Release (VC 9.0):
1019 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
1020 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
1022 2) iASL Compiler/Disassembler and Tools:
1024 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
1025 These are useful C-style macros with the standard definitions. ACPICA
1028 iASL/DTC: Added support for integer expressions and labels. Support for full
1029 expressions for all integer fields in all ACPI tables. Support for labels in
1030 "generic" portions of tables such as UEFI. See the iASL reference manual.
1032 Debugger: Added a command to display the status of global handlers. The
1033 "handlers" command will display op region, fixed event, and miscellaneous
1034 global handlers. installation status -- and for op regions, whether default
1035 or user-installed handler will be used.
1037 iASL: Warn if reserved method incorrectly returns a value. Many predefined
1038 names are defined such that they do not return a value. If implemented as a
1039 method, issue a warning if such a name explicitly returns a value. ACPICA
1042 iASL: Added detection of GPE method name conflicts. Detects a conflict where
1043 there are two GPE methods of the form _Lxy and _Exy in the same scope. (For
1044 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
1046 iASL/DTC: Fixed a couple input scanner issues with comments and line
1047 numbers. Comment remover could get confused and miss a comment ending. Fixed
1048 a problem with line counter maintenance.
1050 iASL/DTC: Reduced the severity of some errors from fatal to error. There is
1051 no need to abort on simple errors within a field definition.
1053 Debugger: Simplified the output of the help command. All help output now in
1054 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
1056 ----------------------------------------
1057 12 January 2011. Summary of changes for version 20110112:
1059 1) ACPI CA Core Subsystem:
1061 Fixed a race condition between method execution and namespace walks that can
1062 possibly cause a fault. The problem was apparently introduced in version
1063 20100528 as a result of a performance optimization that reduces the number of
1064 namespace walks upon method exit by using the delete_namespace_subtree
1065 function instead of the delete_namespace_by_owner function used previously.
1066 Bug is a missing namespace lock in the delete_namespace_subtree function.
1067 dana.myers@oracle.com
1069 Fixed several issues and a possible fault with the automatic "serialized"
1070 method support. History: This support changes a method to "serialized" on the
1071 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
1072 possibility that it cannot handle reentrancy. This fix repairs a couple of
1073 issues seen in the field, especially on machines with many cores:
1075 1) Delete method children only upon the exit of the last thread,
1076 so as to not delete objects out from under other running threads
1077 (and possibly causing a fault.)
1078 2) Set the "serialized" bit for the method only upon the exit of the
1079 Last thread, so as to not cause deadlock when running threads
1081 3) Cleanup the use of the AML "MethodFlags" and internal method flags
1082 so that there is no longer any confusion between the two.
1084 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
1086 Debugger: Now lock the namespace for duration of a namespace dump. Prevents
1087 issues if the namespace is changing dynamically underneath the debugger.
1088 Especially affects temporary namespace nodes, since the debugger displays
1091 Updated the ordering of include files. The ACPICA headers should appear
1092 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can set
1093 any necessary compiler-specific defines, etc. Affects the ACPI-related tools
1096 Updated all ACPICA copyrights and signons to 2011. Added the 2011 copyright
1097 to all module headers and signons, including the Linux header. This affects
1098 virtually every file in the ACPICA core subsystem, iASL compiler, and all
1101 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
1102 project files for VC++ 6.0 are now obsolete. New project files can be found
1103 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
1106 Example Code and Data Size: These are the sizes for the OS-independent
1107 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1108 debug version of the code includes the debug output trace mechanism and has a
1109 much larger code and data size.
1111 Previous Release (VC 6.0):
1112 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
1113 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
1114 Current Release (VC 9.0):
1115 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
1116 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
1118 2) iASL Compiler/Disassembler and Tools:
1120 iASL: Added generic data types to the Data Table compiler. Add "generic" data
1121 types such as UINT32, String, Unicode, etc., to simplify the generation of
1122 platform-defined tables such as UEFI. Lin Ming.
1124 iASL: Added listing support for the Data Table Compiler. Adds listing support
1125 (-l) to display actual binary output for each line of input code.
1127 ----------------------------------------
1128 09 December 2010. Summary of changes for version 20101209:
1130 1) ACPI CA Core Subsystem:
1132 Completed the major overhaul of the GPE support code that was begun in July
1133 2010. Major features include: removal of _PRW execution in ACPICA (host
1134 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
1135 changes to existing interfaces, simplification of GPE handler operation, and
1136 a handful of new interfaces:
1142 One new file, evxfgpe.c to consolidate all external GPE interfaces.
1144 See the ACPICA Programmer Reference for full details and programming
1145 information. See the new section 4.4 "General Purpose Event (GPE) Support"
1146 for a full overview, and section 8.7 "ACPI General Purpose Event Management"
1147 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin Ming,
1148 Bob Moore, Rafael Wysocki.
1150 Implemented a new GPE feature for Windows compatibility, the "Implicit Wake
1151 GPE Notify". This feature will automatically issue a Notify(2) on a device
1152 when a Wake GPE is received if there is no corresponding GPE method or
1153 handler. ACPICA BZ 870.
1155 Fixed a problem with the Scope() operator during table parse and load phase.
1156 During load phase (table load or method execution), the scope operator should
1157 not enter the target into the namespace. Instead, it should open a new scope
1158 at the target location. Linux BZ 19462, ACPICA BZ 882.
1160 Example Code and Data Size: These are the sizes for the OS-independent
1161 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1162 debug version of the code includes the debug output trace mechanism and has a
1163 much larger code and data size.
1166 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
1167 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
1169 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
1170 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
1172 2) iASL Compiler/Disassembler and Tools:
1174 iASL: Relax the alphanumeric restriction on _CID strings. These strings are
1175 "bus-specific" per the ACPI specification, and therefore any characters are
1176 acceptable. The only checks that can be performed are for a null string and
1177 perhaps for a leading asterisk. ACPICA BZ 886.
1179 iASL: Fixed a problem where a syntax error that caused a premature EOF
1180 condition on the source file emitted a very confusing error message. The
1181 premature EOF is now detected correctly. ACPICA BZ 891.
1183 Disassembler: Decode the AccessSize within a Generic Address Structure (byte
1184 access, word access, etc.) Note, this field does not allow arbitrary bit
1185 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
1187 New: AcpiNames utility - Example namespace dump utility. Shows an example of
1188 ACPICA configuration for a minimal namespace dump utility. Uses table and
1189 namespace managers, but no AML interpreter. Does not add any functionality
1190 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
1191 partition and configure ACPICA. ACPICA BZ 883.
1193 AML Debugger: Increased the debugger buffer size for method return objects.
1194 Was 4K, increased to 16K. Also enhanced error messages for debugger method
1195 execution, including the buffer overflow case.
1197 ----------------------------------------
1198 13 October 2010. Summary of changes for version 20101013:
1200 1) ACPI CA Core Subsystem:
1202 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events, now
1203 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
1204 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
1206 Changed the type of the predefined namespace object _TZ from ThermalZone to
1207 Device. This was found to be confusing to the host software that processes
1208 the various thermal zones, since _TZ is not really a ThermalZone. However, a
1209 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
1212 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
1213 string is "Windows 2006 SP2".
1215 Eliminated duplicate code in AcpiUtExecute* functions. Now that the nsrepair
1216 code automatically repairs _HID-related strings, this type of code is no
1217 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ 878.
1219 Example Code and Data Size: These are the sizes for the OS-independent
1220 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1221 debug version of the code includes the debug output trace mechanism and has a
1222 much larger code and data size.
1225 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
1226 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
1228 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
1229 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
1231 2) iASL Compiler/Disassembler and Tools:
1233 iASL: Implemented additional compile-time validation for _HID strings. The
1234 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the length of
1235 the string must be exactly seven or eight characters. For both _HID and _CID
1236 strings, all characters must be alphanumeric. ACPICA BZ 874.
1238 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
1239 descriptors that are mostly or all zeros, with the expectation that they will
1240 be filled in at runtime. iASL now allows this as long as there is a "resource
1241 tag" (name) associated with the descriptor, which gives the ASL a handle
1242 needed to modify the descriptor. ACPICA BZ 873.
1244 Added single-thread support to the generic Unix application OSL. Primarily
1245 for iASL support, this change removes the use of semaphores in the single-
1246 threaded ACPICA tools/applications - increasing performance. The
1247 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
1248 option. ACPICA BZ 879.
1250 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and support
1251 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
1253 iASL: Moved all compiler messages to a new file, aslmessages.h.
1255 ----------------------------------------
1256 15 September 2010. Summary of changes for version 20100915:
1258 1) ACPI CA Core Subsystem:
1260 Removed the AcpiOsDerivePciId OSL interface. The various host implementations
1261 of this function were not OS-dependent and are now obsolete and can be
1262 removed from all host OSLs. This function has been replaced by
1263 AcpiHwDerivePciId, which is now part of the ACPICA core code.
1264 AcpiHwDerivePciId has been implemented without recursion. Adds one new
1265 module, hwpci.c. ACPICA BZ 857.
1267 Implemented a dynamic repair for _HID and _CID strings. The following
1268 problems are now repaired at runtime: 1) Remove a leading asterisk in the
1269 string, and 2) the entire string is uppercased. Both repairs are in
1270 accordance with the ACPI specification and will simplify host driver code.
1273 The ACPI_THREAD_ID type is no longer configurable, internally it is now
1274 always UINT64. This simplifies the ACPICA code, especially any printf output.
1275 UINT64 is the only common data type for all thread_id types across all
1276 operating systems. It is now up to the host OSL to cast the native thread_id
1277 type to UINT64 before returning the value to ACPICA (via AcpiOsGetThreadId).
1278 Lin Ming, Bob Moore.
1280 Added the ACPI_INLINE type to enhance the ACPICA configuration. The "inline"
1281 keyword is not standard across compilers, and this type allows inline to be
1282 configured on a per-compiler basis. Lin Ming.
1284 Made the system global AcpiGbl_SystemAwakeAndRunning publically available.
1285 Added an extern for this boolean in acpixf.h. Some hosts utilize this value
1286 during suspend/restore operations. ACPICA BZ 869.
1288 All code that implements error/warning messages with the "ACPI:" prefix has
1289 been moved to a new module, utxferror.c.
1291 The UINT64_OVERLAY was moved to utmath.c, which is the only module where it
1292 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
1294 Example Code and Data Size: These are the sizes for the OS-independent
1295 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1296 debug version of the code includes the debug output trace mechanism and has a
1297 much larger code and data size.
1300 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
1301 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
1303 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
1304 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
1306 2) iASL Compiler/Disassembler and Tools:
1308 iASL/Disassembler: Write ACPI errors to stderr instead of the output file.
1309 This keeps the output files free of random error messages that may originate
1310 from within the namespace/interpreter code. Used this opportunity to merge
1311 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
1312 866. Lin Ming, Bob Moore.
1314 Tools: update some printfs for ansi warnings on size_t. Handle width change
1315 of size_t on 32-bit versus 64-bit generations. Lin Ming.
1317 ----------------------------------------
1318 06 August 2010. Summary of changes for version 20100806:
1320 1) ACPI CA Core Subsystem:
1322 Designed and implemented a new host interface to the _OSI support code. This
1323 will allow the host to dynamically add or remove multiple _OSI strings, as
1324 well as install an optional handler that is called for each _OSI invocation.
1325 Also added a new AML debugger command, 'osi' to display and modify the global
1326 _OSI string table, and test support in the AcpiExec utility. See the ACPICA
1327 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
1329 AcpiInstallInterface - Add an _OSI string.
1330 AcpiRemoveInterface - Delete an _OSI string.
1331 AcpiInstallInterfaceHandler - Install optional _OSI handler.
1333 AcpiOsValidateInterface - no longer used.
1335 source/components/utilities/utosi.c
1337 Re-introduced the support to enable multi-byte transfers for Embedded
1338 Controller (EC) operation regions. A reported problem was found to be a bug
1339 in the host OS, not in the multi-byte support. Previously, the maximum data
1340 size passed to the EC operation region handler was a single byte. There are
1341 often EC Fields larger than one byte that need to be transferred, and it is
1342 useful for the EC driver to lock these as a single transaction. This change
1343 enables single transfers larger than 8 bits. This effectively changes the
1344 access to the EC space from ByteAcc to AnyAcc, and will probably require
1345 changes to the host OS Embedded Controller driver to enable 16/32/64/256-bit
1346 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
1348 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
1349 prototype in acpiosxf.h had the output value pointer as a (void *).
1350 It should be a (UINT64 *). This may affect some host OSL code.
1352 Fixed a couple problems with the recently modified Linux makefiles for iASL
1353 and AcpiExec. These new makefiles place the generated object files in the
1354 local directory so that there can be no collisions between the files that are
1355 shared between them that are compiled with different options.
1357 Example Code and Data Size: These are the sizes for the OS-independent
1358 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1359 debug version of the code includes the debug output trace mechanism and has a
1360 much larger code and data size.
1363 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
1364 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
1366 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
1367 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
1369 2) iASL Compiler/Disassembler and Tools:
1371 iASL/Disassembler: Added a new option (-da, "disassemble all") to load the
1372 namespace from and disassemble an entire group of AML files. Useful for
1373 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn) and
1374 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
1376 iASL: Allow multiple invocations of -e option. This change allows multiple
1377 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ 834.
1380 ----------------------------------------
1381 02 July 2010. Summary of changes for version 20100702:
1383 1) ACPI CA Core Subsystem:
1385 Implemented several updates to the recently added GPE reference count
1386 support. The model for "wake" GPEs is changing to give the host OS complete
1387 control of these GPEs. Eventually, the ACPICA core will not execute any _PRW
1388 methods, since the host already must execute them. Also, additional changes
1389 were made to help ensure that the reference counts are kept in proper
1390 synchronization with reality. Rafael J. Wysocki.
1392 1) Ensure that GPEs are not enabled twice during initialization.
1393 2) Ensure that GPE enable masks stay in sync with the reference count.
1394 3) Do not inadvertently enable GPEs when writing GPE registers.
1395 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
1396 interface. This interface will set or clear individual GPEs for wakeup.
1397 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These interfaces
1398 are now used for "runtime" GPEs only.
1400 Changed the behavior of the GPE install/remove handler interfaces. The GPE is
1401 no longer disabled during this process, as it was found to cause problems on
1402 some machines. Rafael J. Wysocki.
1404 Reverted a change introduced in version 20100528 to enable Embedded
1405 Controller multi-byte transfers. This change was found to cause problems with
1406 Index Fields and possibly Bank Fields. It will be reintroduced when these
1407 problems have been resolved.
1409 Fixed a problem with references to Alias objects within Package Objects. A
1410 reference to an Alias within the definition of a Package was not always
1411 resolved properly. Aliases to objects like Processors, Thermal zones, etc.
1412 were resolved to the actual object instead of a reference to the object as it
1413 should be. Package objects are only allowed to contain integer, string,
1414 buffer, package, and reference objects. Redhat bugzilla 608648.
1416 Example Code and Data Size: These are the sizes for the OS-independent
1417 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1418 debug version of the code includes the debug output trace mechanism and has a
1419 much larger code and data size.
1422 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
1423 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
1425 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
1426 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
1428 2) iASL Compiler/Disassembler and Tools:
1430 iASL: Implemented a new compiler subsystem to allow definition and
1431 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc. These
1432 are called "ACPI Data Tables", and the new compiler is the "Data Table
1433 Compiler". This compiler is intended to simplify the existing error-prone
1434 process of creating these tables for the BIOS, as well as allowing the
1435 disassembly, modification, recompilation, and override of existing ACPI data
1436 tables. See the iASL User Guide for detailed information.
1438 iASL: Implemented a new Template Generator option in support of the new Data
1439 Table Compiler. This option will create examples of all known ACPI tables
1440 that can be used as the basis for table development. See the iASL
1441 documentation and the -T option.
1443 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
1446 Updated the Linux makefiles for iASL and AcpiExec to place the generated
1447 object files in the local directory so that there can be no collisions
1448 between the shared files between them that are generated with different
1451 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec. Use
1452 the #define __APPLE__ to enable this support.
1454 ----------------------------------------
1455 28 May 2010. Summary of changes for version 20100528:
1457 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
1458 available at www.acpi.info. This is primarily an errata release.
1460 1) ACPI CA Core Subsystem:
1462 Undefined ACPI tables: We are looking for the definitions for the following
1463 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
1465 Implemented support to enable multi-byte transfers for Embedded Controller
1466 (EC) operation regions. Previously, the maximum data size passed to the EC
1467 operation region handler was a single byte. There are often EC Fields larger
1468 than one byte that need to be transferred, and it is useful for the EC driver
1469 to lock these as a single transaction. This change enables single transfers
1470 larger than 8 bits. This effectively changes the access to the EC space from
1471 ByteAcc to AnyAcc, and will probably require changes to the host OS Embedded
1472 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-bit
1473 transfers. Alexey Starikovskiy, Lin Ming
1475 Implemented a performance enhancement for namespace search and access. This
1476 change enhances the performance of namespace searches and walks by adding a
1477 backpointer to the parent in each namespace node. On large namespaces, this
1478 change can improve overall ACPI performance by up to 9X. Adding a pointer to
1479 each namespace node increases the overall size of the internal namespace by
1480 about 5%, since each namespace entry usually consists of both a namespace
1481 node and an ACPI operand object. However, this is the first growth of the
1482 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
1484 Implemented a performance optimization that reduces the number of namespace
1485 walks. On control method exit, only walk the namespace if the method is known
1486 to have created namespace objects outside of its local scope. Previously, the
1487 entire namespace was traversed on each control method exit. This change can
1488 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob Moore.
1490 Added support to truncate I/O addresses to 16 bits for Windows compatibility.
1491 Some ASL code has been seen in the field that inadvertently has bits set
1492 above bit 15. This feature is optional and is enabled if the BIOS requests
1493 any Windows OSI strings. It can also be enabled by the host OS. Matthew
1496 Added support to limit the maximum time for the ASL Sleep() operator. To
1497 prevent accidental deep sleeps, limit the maximum time that Sleep() will
1498 actually sleep. Configurable, the default maximum is two seconds. ACPICA
1501 Added run-time validation support for the _WDG and_WED Microsoft predefined
1502 methods. These objects are defined by "Windows Instrumentation", and are not
1503 part of the ACPI spec. ACPICA BZ 860.
1505 Expanded all statistic counters used during namespace and device
1506 initialization from 16 to 32 bits in order to support very large namespaces.
1508 Replaced all instances of %d in printf format specifiers with %u since nearly
1509 all integers in ACPICA are unsigned.
1511 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly returned
1514 Example Code and Data Size: These are the sizes for the OS-independent
1515 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1516 debug version of the code includes the debug output trace mechanism and has a
1517 much larger code and data size.
1520 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
1521 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
1523 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
1524 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
1526 2) iASL Compiler/Disassembler and Tools:
1528 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
1529 methods. These objects are defined by "Windows Instrumentation", and are not
1530 part of the ACPI spec. ACPICA BZ 860.
1532 AcpiExec: added option to disable the memory tracking mechanism. The -dt
1533 option will disable the tracking mechanism, which improves performance
1536 AcpiExec: Restructured the command line options into -d (disable) and -e
1539 ----------------------------------------
1540 28 April 2010. Summary of changes for version 20100428:
1542 1) ACPI CA Core Subsystem:
1544 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
1545 including FADT-based and GPE Block Devices, execute any _PRW methods in the
1546 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
1547 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
1548 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
1549 Devices. Provides compatibility with other ACPI implementations. Two new
1550 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob Moore.
1552 Fixed a regression introduced in version 20100331 within the table manager
1553 where initial table loading could fail. This was introduced in the fix for
1554 AcpiReallocateRootTable. Also, renamed some of fields in the table manager
1555 data structures to clarify their meaning and use.
1557 Fixed a possible allocation overrun during internal object copy in
1558 AcpiUtCopySimpleObject. The original code did not correctly handle the case
1559 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ 847.
1561 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
1562 possible access beyond end-of-allocation. Also, now fully validate descriptor
1563 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
1565 Example Code and Data Size: These are the sizes for the OS-independent
1566 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1567 debug version of the code includes the debug output trace mechanism and has a
1568 much larger code and data size.
1571 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
1572 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
1574 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
1575 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
1577 2) iASL Compiler/Disassembler and Tools:
1579 iASL: Implemented Min/Max/Len/Gran validation for address resource
1580 descriptors. This change implements validation for the address fields that
1581 are common to all address-type resource descriptors. These checks are
1582 implemented: Checks for valid Min/Max, length within the Min/Max window,
1583 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as per
1584 table 6-40 in the ACPI 4.0a specification. Also split the large aslrestype1.c
1585 and aslrestype2.c files into five new files. ACPICA BZ 840.
1587 iASL: Added support for the _Wxx predefined names. This support was missing
1588 and these names were not recognized by the compiler as valid predefined
1589 names. ACPICA BZ 851.
1591 iASL: Added an error for all predefined names that are defined to return no
1592 value and thus must be implemented as Control Methods. These include all of
1593 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
1594 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
1596 iASL: Implemented the -ts option to emit hex AML data in ASL format, as an
1597 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to be
1598 dynamically loaded via the Load() operator. Also cleaned up output for the -
1599 ta and -tc options. ACPICA BZ 853.
1601 Tests: Added a new file with examples of extended iASL error checking.
1602 Demonstrates the advanced error checking ability of the iASL compiler.
1603 Available at tests/misc/badcode.asl.
1605 ----------------------------------------
1606 31 March 2010. Summary of changes for version 20100331:
1608 1) ACPI CA Core Subsystem:
1610 Completed a major update for the GPE support in order to improve support for
1611 shared GPEs and to simplify both host OS and ACPICA code. Added a reference
1612 count mechanism to support shared GPEs that require multiple device drivers.
1613 Several external interfaces have changed. One external interface has been
1614 removed. One new external interface was added. Most of the GPE external
1615 interfaces now use the GPE spinlock instead of the events mutex (and the
1616 Flags parameter for many GPE interfaces has been removed.) See the updated
1617 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, Rafael
1618 Wysocki. ACPICA BZ 831.
1621 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
1627 Implemented write support for DataTable operation regions. These regions are
1628 defined via the DataTableRegion() operator. Previously, only read support was
1629 implemented. The ACPI specification allows DataTableRegions to be read/write,
1632 Implemented a new subsystem option to force a copy of the DSDT to local
1633 memory. Optionally copy the entire DSDT to local memory (instead of simply
1634 mapping it.) There are some (albeit very rare) BIOSs that corrupt or replace
1635 the original DSDT, creating the need for this option. Default is FALSE, do
1638 Implemented detection of a corrupted or replaced DSDT. This change adds
1639 support to detect a DSDT that has been corrupted and/or replaced from outside
1640 the OS (by firmware). This is typically catastrophic for the system, but has
1641 been seen on some machines. Once this problem has been detected, the DSDT
1642 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
1644 Fixed two problems with AcpiReallocateRootTable during the root table copy.
1645 When copying the root table to the new allocation, the length used was
1646 incorrect. The new size was used instead of the current table size, meaning
1647 too much data was copied. Also, the count of available slots for ACPI tables
1648 was not set correctly. Alexey Starikovskiy, Bob Moore.
1650 Example Code and Data Size: These are the sizes for the OS-independent
1651 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1652 debug version of the code includes the debug output trace mechanism and has a
1653 much larger code and data size.
1656 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
1657 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
1659 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
1660 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
1662 2) iASL Compiler/Disassembler and Tools:
1664 iASL: Implement limited typechecking for values returned from predefined
1665 control methods. The type of any returned static (unnamed) object is now
1666 validated. For example, Return(1). ACPICA BZ 786.
1668 iASL: Fixed a predefined name object verification regression. Fixes a problem
1669 introduced in version 20100304. An error is incorrectly generated if a
1670 predefined name is declared as a static named object with a value defined
1671 using the keywords "Zero", "One", or "Ones". Lin Ming.
1673 iASL: Added Windows 7 support for the -g option (get local ACPI tables) by
1674 reducing the requested registry access rights. ACPICA BZ 842.
1676 Disassembler: fixed a possible fault when generating External() statements.
1677 Introduced in commit ae7d6fd: Properly handle externals with parent-prefix
1678 (carat). Fixes a string length allocation calculation. Lin Ming.
1680 ----------------------------------------
1681 04 March 2010. Summary of changes for version 20100304:
1683 1) ACPI CA Core Subsystem:
1685 Fixed a possible problem with the AML Mutex handling function
1686 AcpiExReleaseMutex where the function could fault under the very rare
1687 condition when the interpreter has blocked, the interpreter lock is released,
1688 the interpreter is then reentered via the same thread, and attempts to
1689 acquire an AML mutex that was previously acquired. FreeBSD report 140979. Lin
1692 Implemented additional configuration support for the AML "Debug Object".
1693 Output from the debug object can now be enabled via a global variable,
1694 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine debugging.
1695 This debug output is now available in the release version of ACPICA instead
1696 of just the debug version. Also, the entire debug output module can now be
1697 configured out of the ACPICA build if desired. One new file added,
1698 executer/exdebug.c. Lin Ming, Bob Moore.
1700 Added header support for the ACPI MCHI table (Management Controller Host
1701 Interface Table). This table was added in ACPI 4.0, but the defining document
1702 has only recently become available.
1704 Standardized output of integer values for ACPICA warnings/errors. Always use
1705 0x prefix for hex output, always use %u for unsigned integer decimal output.
1706 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400
1707 invocations.) These invocations were converted from the original
1708 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
1710 Example Code and Data Size: These are the sizes for the OS-independent
1711 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1712 debug version of the code includes the debug output trace mechanism and has a
1713 much larger code and data size.
1716 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
1717 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
1719 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
1720 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
1722 2) iASL Compiler/Disassembler and Tools:
1724 iASL: Implemented typechecking support for static (non-control method)
1725 predefined named objects that are declared with the Name() operator. For
1726 example, the type of this object is now validated to be of type Integer:
1727 Name(_BBN, 1). This change migrates the compiler to using the core predefined
1728 name table instead of maintaining a local version. Added a new file,
1729 aslpredef.c. ACPICA BZ 832.
1731 Disassembler: Added support for the ACPI 4.0 MCHI table.
1733 ----------------------------------------
1734 21 January 2010. Summary of changes for version 20100121:
1736 1) ACPI CA Core Subsystem:
1738 Added the 2010 copyright to all module headers and signons. This affects
1739 virtually every file in the ACPICA core subsystem, the iASL compiler, the
1740 tools/utilities, and the test suites.
1742 Implemented a change to the AcpiGetDevices interface to eliminate unnecessary
1743 invocations of the _STA method. In the case where a specific _HID is
1744 requested, do not run _STA until a _HID match is found. This eliminates
1745 potentially dozens of _STA calls during a search for a particular device/HID,
1746 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
1748 Implemented an additional repair for predefined method return values. Attempt
1749 to repair unexpected NULL elements within returned Package objects. Create an
1750 Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.
1751 ACPICA BZ 818. Lin Ming, Bob Moore.
1753 Removed the obsolete ACPI_INTEGER data type. This type was introduced as the
1754 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with
1755 64-bit AML integers). It is now obsolete and this change removes it from the
1756 ACPICA code base, replaced by UINT64. The original typedef has been retained
1757 for now for compatibility with existing device driver code. ACPICA BZ 824.
1759 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in
1760 the parse tree object.
1762 Added additional warning options for the gcc-4 generation. Updated the source
1763 accordingly. This includes some code restructuring to eliminate unreachable
1764 code, elimination of some gotos, elimination of unused return values, some
1765 additional casting, and removal of redundant declarations.
1767 Example Code and Data Size: These are the sizes for the OS-independent
1768 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1769 debug version of the code includes the debug output trace mechanism and has a
1770 much larger code and data size.
1773 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
1774 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
1776 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
1777 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
1779 2) iASL Compiler/Disassembler and Tools:
1781 No functional changes for this release.
1783 ----------------------------------------
1784 14 December 2009. Summary of changes for version 20091214:
1786 1) ACPI CA Core Subsystem:
1788 Enhanced automatic data type conversions for predefined name repairs. This
1789 change expands the automatic repairs/conversions for predefined name return
1790 values to make Integers, Strings, and Buffers fully interchangeable. Also, a
1791 Buffer can be converted to a Package of Integers if necessary. The nsrepair.c
1792 module was completely restructured. Lin Ming, Bob Moore.
1794 Implemented automatic removal of null package elements during predefined name
1795 repairs. This change will automatically remove embedded and trailing NULL
1796 package elements from returned package objects that are defined to contain a
1797 variable number of sub-packages. The driver is then presented with a package
1798 with no null elements to deal with. ACPICA BZ 819.
1800 Implemented a repair for the predefined _FDE and _GTM names. The expected
1801 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
1802 possible problems (both seen in the field), where a package of integers is
1803 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.
1805 Implemented additional module-level code support. This change will properly
1806 execute module-level code that is not at the root of the namespace (under a
1807 Device object, etc.). Now executes the code within the current scope instead
1808 of the root. ACPICA BZ 762. Lin Ming.
1810 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
1811 problem where mutex errors can occur when running a _REG method that is in
1812 the same scope as a method-defined operation region or an operation region
1813 under a module-level IF block. This type of code is rare, so the problem has
1814 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
1816 Fixed a possible memory leak during module-level code execution. An object
1817 could be leaked for each block of executed module-level code if the
1818 interpreter slack mode is enabled This change deletes any implicitly returned
1819 object from the module-level code block. Lin Ming.
1821 Removed messages for successful predefined repair(s). The repair mechanism
1822 was considered too wordy. Now, messages are only unconditionally emitted if
1823 the return object cannot be repaired. Existing messages for successful
1824 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.
1826 Example Code and Data Size: These are the sizes for the OS-independent
1827 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1828 debug version of the code includes the debug output trace mechanism and has a
1829 much larger code and data size.
1832 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
1833 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
1835 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
1836 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
1838 2) iASL Compiler/Disassembler and Tools:
1840 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files
1841 were no longer automatically removed at the termination of the compile.
1843 acpiexec: Implemented the -f option to specify default region fill value.
1844 This option specifies the value used to initialize buffers that simulate
1845 operation regions. Default value is zero. Useful for debugging problems that
1846 depend on a specific initial value for a region or field.
1848 ----------------------------------------
1849 12 November 2009. Summary of changes for version 20091112:
1851 1) ACPI CA Core Subsystem:
1853 Implemented a post-order callback to AcpiWalkNamespace. The existing
1854 interface only has a pre-order callback. This change adds an additional
1855 parameter for a post-order callback which will be more useful for bus scans.
1856 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
1858 Modified the behavior of the operation region memory mapping cache for
1859 SystemMemory. Ensure that the memory mappings created for operation regions
1860 do not cross 4K page boundaries. Crossing a page boundary while mapping
1861 regions can cause kernel warnings on some hosts if the pages have different
1862 attributes. Such regions are probably BIOS bugs, and this is the workaround.
1863 Linux BZ 14445. Lin Ming.
1865 Implemented an automatic repair for predefined methods that must return
1866 sorted lists. This change will repair (by sorting) packages returned by _ALR,
1867 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
1868 and do not contain NULL package elements. Adds one new file,
1869 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
1871 Fixed a possible fault during predefined name validation if a return Package
1872 object contains NULL elements. Also adds a warning if a NULL element is
1873 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
1874 include repair or removal of all such NULL elements where possible.
1876 Implemented additional module-level executable AML code support. This change
1877 will execute module-level code that is not at the root of the namespace
1878 (under a Device object, etc.) at table load time. Module-level executable AML
1879 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
1881 Implemented a new internal function to create Integer objects. This function
1882 simplifies miscellaneous object creation code. ACPICA BZ 823.
1884 Reduced the severity of predefined repair messages, Warning to Info. Since
1885 the object was successfully repaired, a warning is too severe. Reduced to an
1886 info message for now. These messages may eventually be changed to debug-only.
1889 Example Code and Data Size: These are the sizes for the OS-independent
1890 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1891 debug version of the code includes the debug output trace mechanism and has a
1892 much larger code and data size.
1895 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
1896 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
1898 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
1899 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
1901 2) iASL Compiler/Disassembler and Tools:
1903 iASL: Implemented Switch() with While(1) so that Break works correctly. This
1904 change correctly implements the Switch operator with a surrounding While(1)
1905 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
1907 iASL: Added a message if a package initializer list is shorter than package
1908 length. Adds a new remark for a Package() declaration if an initializer list
1909 exists, but is shorter than the declared length of the package. Although
1910 technically legal, this is probably a coding error and it is seen in the
1911 field. ACPICA BZ 815. Lin Ming, Bob Moore.
1913 iASL: Fixed a problem where the compiler could fault after the maximum number
1914 of errors was reached (200).
1916 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
1917 level set very high.
1919 ----------------------------------------
1920 13 October 2009. Summary of changes for version 20091013:
1922 1) ACPI CA Core Subsystem:
1924 Fixed a problem where an Operation Region _REG method could be executed more
1925 than once. If a custom address space handler is installed by the host before
1926 the "initialize operation regions" phase of the ACPICA initialization, any
1927 _REG methods for that address space could be executed twice. This change
1928 fixes the problem. ACPICA BZ 427. Lin Ming.
1930 Fixed a possible memory leak for the Scope() ASL operator. When the exact
1931 invocation of "Scope(\)" is executed (change scope to root), one internal
1932 operand object was leaked. Lin Ming.
1934 Implemented a run-time repair for the _MAT predefined method. If the _MAT
1935 return value is defined as a Field object in the AML, and the field
1936 size is less than or equal to the default width of an integer (32 or 64),_MAT
1937 can incorrectly return an Integer instead of a Buffer. ACPICA now
1938 automatically repairs this problem. ACPICA BZ 810.
1940 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
1941 "OEM Information" field is often incorrectly returned as an Integer with
1942 value zero if the field is not supported by the platform. This is due to an
1943 ambiguity in the ACPI specification. The field should always be a string.
1944 ACPICA now automatically repairs this problem by returning a NULL string
1945 within the returned Package. ACPICA BZ 807.
1947 Example Code and Data Size: These are the sizes for the OS-independent
1948 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1949 debug version of the code includes the debug output trace mechanism and has a
1950 much larger code and data size.
1953 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
1954 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
1956 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
1957 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
1959 2) iASL Compiler/Disassembler and Tools:
1961 Disassembler: Fixed a problem where references to external symbols that
1962 contained one or more parent-prefixes (carats) were not handled correctly,
1963 possibly causing a fault. ACPICA BZ 806. Lin Ming.
1965 Disassembler: Restructured the code so that all functions that handle
1966 external symbols are in a single module. One new file is added,
1969 AML Debugger: Added a max count argument for the Batch command (which
1970 executes multiple predefined methods within the namespace.)
1972 iASL: Updated the compiler documentation (User Reference.) Available at
1973 http://www.acpica.org/documentation/. ACPICA BZ 750.
1975 AcpiXtract: Updated for Lint and other formatting changes. Close all open
1978 ----------------------------------------
1979 03 September 2009. Summary of changes for version 20090903:
1981 1) ACPI CA Core Subsystem:
1983 For Windows Vista compatibility, added the automatic execution of an _INI
1984 method located at the namespace root (\_INI). This method is executed at
1985 table load time. This support is in addition to the automatic execution of
1986 \_SB._INI. Lin Ming.
1988 Fixed a possible memory leak in the interpreter for AML package objects if
1989 the package initializer list is longer than the defined size of the package.
1990 This apparently can only happen if the BIOS changes the package size on the
1991 fly (seen in a _PSS object), as ASL compilers do not allow this. The
1992 interpreter will truncate the package to the defined size (and issue an error
1993 message), but previously could leave the extra objects undeleted if they were
1994 pre-created during the argument processing (such is the case if the package
1995 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
1997 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
1998 This has been reported in the field. Previously, ACPICA would zero out the
1999 buffer/string. Now, the operation is treated as a noop. Provides Windows
2000 compatibility. ACPICA BZ 803. Lin Ming.
2002 Removed an extraneous error message for ASL constructs of the form
2003 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
2004 are seen in many BIOSs and are once again treated as NOOPs and no error is
2005 emitted when they are encountered. ACPICA BZ 785.
2007 Fixed an extraneous warning message if a _DSM reserved method returns a
2008 Package object. _DSM can return any type of object, so validation on the
2009 return type cannot be performed. ACPICA BZ 802.
2011 Example Code and Data Size: These are the sizes for the OS-independent
2012 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2013 debug version of the code includes the debug output trace mechanism and has a
2014 much larger code and data size.
2017 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
2018 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
2020 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
2021 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
2023 2) iASL Compiler/Disassembler and Tools:
2025 iASL: Fixed a problem with the use of the Alias operator and Resource
2026 Templates. The correct alias is now constructed and no error is emitted.
2029 iASL: Implemented the -I option to specify additional search directories for
2030 include files. Allows multiple additional search paths for include files.
2031 Directories are searched in the order specified on the command line (after
2032 the local directory is searched.) ACPICA BZ 800.
2034 iASL: Fixed a problem where the full pathname for include files was not
2035 emitted for warnings/errors. This caused the IDE support to not work
2036 properly. ACPICA BZ 765.
2038 iASL: Implemented the -@ option to specify a Windows-style response file
2039 containing additional command line options. ACPICA BZ 801.
2041 AcpiExec: Added support to load multiple AML files simultaneously (such as a
2042 DSDT and multiple SSDTs). Also added support for wildcards within the AML
2043 pathname. These features allow all machine tables to be easily loaded and
2044 debugged together. ACPICA BZ 804.
2046 Disassembler: Added missing support for disassembly of HEST table Error Bank
2049 ----------------------------------------
2050 30 July 2009. Summary of changes for version 20090730:
2052 The ACPI 4.0 implementation for ACPICA is complete with this release.
2054 1) ACPI CA Core Subsystem:
2056 ACPI 4.0: Added header file support for all new and changed ACPI tables.
2057 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
2058 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
2059 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
2060 have been some ACPI 4.0 changes to other existing tables. Split the large
2061 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
2063 ACPI 4.0: Implemented predefined name validation for all new names. There are
2064 31 new names in ACPI 4.0. The predefined validation module was split into two
2065 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
2067 Implemented support for so-called "module-level executable code". This is
2068 executable AML code that exists outside of any control method and is intended
2069 to be executed at table load time. Although illegal since ACPI 2.0, this type
2070 of code still exists and is apparently still being created. Blocks of this
2071 code are now detected and executed as intended. Currently, the code blocks
2072 must exist under either an If, Else, or While construct; these are the
2073 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
2075 Implemented an automatic dynamic repair for predefined names that return
2076 nested Package objects. This applies to predefined names that are defined to
2077 return a variable-length Package of sub-packages. If the number of sub-
2078 packages is one, BIOS code is occasionally seen that creates a simple single
2079 package with no sub-packages. This code attempts to fix the problem by
2080 wrapping a new package object around the existing package. These methods can
2081 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
2084 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
2085 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
2088 Fixed a problem with AcpiReset where the reset would silently fail if the
2089 register was one of the protected I/O ports. AcpiReset now bypasses the port
2090 validation mechanism. This may eventually be driven into the AcpiRead/Write
2093 Fixed a regression related to the recent update of the AcpiRead/Write
2094 interfaces. A sleep/suspend could fail if the optional PM2 Control register
2095 does not exist during an attempt to write the Bus Master Arbitration bit.
2096 (However, some hosts already delete the code that writes this bit, and the
2097 code may in fact be obsolete at this date.) ACPICA BZ 799.
2099 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
2100 in succession. ACPICA BZ 795.
2102 Example Code and Data Size: These are the sizes for the OS-independent
2103 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2104 debug version of the code includes the debug output trace mechanism and has a
2105 much larger code and data size.
2108 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
2109 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
2111 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
2112 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
2114 2) iASL Compiler/Disassembler and Tools:
2116 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
2117 changes to existing tables. ACPICA BZ 775.
2119 ----------------------------------------
2120 25 June 2009. Summary of changes for version 20090625:
2122 The ACPI 4.0 Specification was released on June 16 and is available at
2123 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
2124 continue for the next few releases.
2126 1) ACPI CA Core Subsystem:
2128 ACPI 4.0: Implemented interpreter support for the IPMI operation region
2129 address space. Includes support for bi-directional data buffers and an IPMI
2130 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
2133 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
2134 support in both the header files and the disassembler.
2136 Completed a major update for the AcpiGetObjectInfo external interface.
2138 - Support for variable, unlimited length HID, UID, and CID strings.
2139 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
2140 - Call the _SxW power methods on behalf of a device object.
2141 - Determine if a device is a PCI root bridge.
2142 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
2143 These changes will require an update to all callers of this interface. See
2144 the updated ACPICA Programmer Reference for details. One new source file has
2145 been added - utilities/utids.c. ACPICA BZ 368, 780.
2147 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
2148 transfers. The Value parameter has been extended from 32 bits to 64 bits in
2149 order to support new ACPI 4.0 tables. These changes will require an update to
2150 all callers of these interfaces. See the ACPICA Programmer Reference for
2151 details. ACPICA BZ 768.
2153 Fixed several problems with AcpiAttachData. The handler was not invoked when
2154 the host node was deleted. The data sub-object was not automatically deleted
2155 when the host node was deleted. The interface to the handler had an unused
2156 parameter, this was removed. ACPICA BZ 778.
2158 Enhanced the function that dumps ACPI table headers. All non-printable
2159 characters in the string fields are now replaced with '?' (Signature, OemId,
2160 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
2161 these fields are occasionally seen in the field. ACPICA BZ 788.
2163 Fixed a problem with predefined method repair code where the code that
2164 attempts to repair/convert an object of incorrect type is only executed on
2165 the first time the predefined method is called. The mechanism that disables
2166 warnings on subsequent calls was interfering with the repair mechanism.
2169 Fixed a possible memory leak in the predefined validation/repair code when a
2170 buffer is automatically converted to an expected string object.
2172 Removed obsolete 16-bit files from the distribution and from the current git
2173 tree head. ACPICA BZ 776.
2175 Example Code and Data Size: These are the sizes for the OS-independent
2176 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2177 debug version of the code includes the debug output trace mechanism and has a
2178 much larger code and data size.
2181 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
2182 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
2184 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
2185 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
2187 2) iASL Compiler/Disassembler and Tools:
2189 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
2190 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
2192 ACPI 4.0: iASL - implemented compile-time validation support for all new
2193 predefined names and control methods (31 total). ACPICA BZ 769.
2195 ----------------------------------------
2196 21 May 2009. Summary of changes for version 20090521:
2198 1) ACPI CA Core Subsystem:
2200 Disabled the preservation of the SCI enable bit in the PM1 control register.
2201 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
2202 a "preserved" bit - "OSPM always preserves this bit position", section
2203 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
2204 because the bit needs to be explicitly set by the OS as a workaround. No
2205 machines fail if the bit is not preserved. Therefore, ACPICA no longer
2206 attempts to preserve this bit.
2208 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
2209 incorrectly formed _PRT package could cause a fault. Added validation to
2210 ensure that each package element is actually a sub-package.
2212 Implemented a new interface to install or override a single control method,
2213 AcpiInstallMethod. This interface is useful when debugging in order to repair
2214 an existing method or to install a missing method without having to override
2215 the entire ACPI table. See the ACPICA Programmer Reference for use and
2216 examples. Lin Ming, Bob Moore.
2218 Fixed several reference count issues with the DdbHandle object that is
2219 created from a Load or LoadTable operator. Prevent premature deletion of the
2220 object. Also, mark the object as invalid once the table has been unloaded.
2221 This is needed because the handle itself may not be deleted after the table
2222 unload, depending on whether it has been stored in a named object by the
2225 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
2226 mutexes of the same sync level are acquired but then not released in strict
2227 opposite order, the internally maintained Current Sync Level becomes confused
2228 and can cause subsequent execution errors. ACPICA BZ 471.
2230 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
2231 specification has been changed to make the SyncLevel for mutex objects more
2232 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
2233 same as the current sync level. This makes more sense than the previous rule
2234 (SyncLevel less than or equal). This change updates the code to match the
2237 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
2238 (local) cache must be locked during all cache object deletions. Andrew
2241 Updated the Load operator to use operation region interfaces. This replaces
2242 direct memory mapping with region access calls. Now, all region accesses go
2243 through the installed region handler as they should.
2245 Simplified and optimized the NsGetNextNode function. Reduced parameter count
2246 and reduced code for this frequently used function.
2248 Example Code and Data Size: These are the sizes for the OS-independent
2249 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2250 debug version of the code includes the debug output trace mechanism and has a
2251 much larger code and data size.
2254 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
2255 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
2257 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
2258 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
2260 2) iASL Compiler/Disassembler and Tools:
2262 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
2263 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
2264 after an invalid sub-table ID.
2266 ----------------------------------------
2267 22 April 2009. Summary of changes for version 20090422:
2269 1) ACPI CA Core Subsystem:
2271 Fixed a compatibility issue with the recently released I/O port protection
2272 mechanism. For windows compatibility, 1) On a port protection violation,
2273 simply ignore the request and do not return an exception (allow the control
2274 method to continue execution.) 2) If only part of the request overlaps a
2275 protected port, read/write the individual ports that are not protected. Linux
2278 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
2279 breaks into the AML debugger if the debugger is present. This matches the
2280 ACPI-defined behavior.
2282 Fixed several possible warnings related to the use of the configurable
2283 ACPI_THREAD_ID. This type can now be configured as either an integer or a
2284 pointer with no warnings. Also fixes several warnings in printf-like
2285 statements for the 64-bit build when the type is configured as a pointer.
2288 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
2289 warning options.) Examples include printf formats, aliasing, unused globals,
2290 missing prototypes, missing switch default statements, use of non-ANSI
2291 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
2292 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
2294 Example Code and Data Size: These are the sizes for the OS-independent
2295 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2296 debug version of the code includes the debug output trace mechanism and has a
2297 much larger code and data size.
2300 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
2301 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
2303 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
2304 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
2306 2) iASL Compiler/Disassembler and Tools:
2308 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
2311 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
2312 correctly digest Windows/DOS formatted files (with CR/LF).
2314 iASL: Added a new option for "quiet mode" (-va) that produces only the
2315 compilation summary, not individual errors and warnings. Useful for large
2318 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
2319 timeout that can be used to detect hang conditions during execution of AML
2320 code (includes both internal semaphores and AML-defined mutexes and events.)
2322 Added new makefiles for the generation of acpica in a generic unix-like
2323 environment. These makefiles are intended to generate the acpica tools and
2324 utilities from the original acpica git source tree structure.
2326 Test Suites: Updated and cleaned up the documentation files. Updated the
2327 copyrights to 2009, affecting all source files. Use the new version of iASL
2328 with quiet mode. Increased the number of available semaphores in the Windows
2329 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
2330 an alternate implementation of the semaphore timeout to allow aslts to
2331 execute fully on Cygwin.
2333 ----------------------------------------
2334 20 March 2009. Summary of changes for version 20090320:
2336 1) ACPI CA Core Subsystem:
2338 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
2339 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
2340 namespace walks (readers), but block a dynamic table unload until it can gain
2341 exclusive write access to the namespace. This fixes a problem where a table
2342 unload could (possibly catastrophically) delete the portion of the namespace
2343 that is currently being examined by a walk. Adds a new file, utlock.c, that
2344 implements the reader/writer lock mechanism. ACPICA BZ 749.
2346 Fixed a regression introduced in version 20090220 where a change to the FADT
2347 handling could cause the ACPICA subsystem to access non-existent I/O ports.
2349 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
2350 FADT can contain both 32-bit and 64-bit versions of these addresses.
2351 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
2352 versions were valid, but not equal, the 64-bit version was used. This was
2353 found to cause some machines to fail. Now, in this case, the 32-bit version
2354 is used instead. This now matches the Windows behavior.
2356 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
2357 compatibility and protects the standard PC I/O ports from access via AML
2358 code. Adds a new file, hwvalid.c
2360 Fixed a possible extraneous warning message from the FADT support. The
2361 message warns of a 32/64 length mismatch between the legacy and GAS
2362 definitions for a register.
2364 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
2365 made obsolete by the port protection mechanism above. It was previously used
2366 to validate the entire address range of an operation region, which could be
2367 incorrect if the range included illegal ports, but fields within the
2368 operation region did not actually access those ports. Validation is now
2369 performed on a per-field basis instead of the entire region.
2371 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
2372 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
2373 means a read/modify/write when writing to the register. However, for status
2374 registers, writing a one means clear the event. Writing a zero means preserve
2375 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
2376 and the ACPICA code now simply always writes a zero to the ignored bit.
2378 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
2379 per the ACPI specification, for the control registers, preserve
2380 (read/modify/write) all bits that are defined as either reserved or ignored.
2382 Updated the handling of write-only bits in the PM1 A/B Control Registers.
2383 When reading the register, zero the write-only bits as per the ACPI spec.
2384 ACPICA BZ 443. Lin Ming.
2386 Removed "Linux" from the list of supported _OSI strings. Linux no longer
2387 wants to reply true to this request. The Windows strings are the only paths
2388 through the AML that are tested and known to work properly.
2391 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
2392 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
2394 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
2395 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
2397 2) iASL Compiler/Disassembler and Tools:
2399 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
2402 ----------------------------------------
2403 20 February 2009. Summary of changes for version 20090220:
2405 1) ACPI CA Core Subsystem:
2407 Optimized the ACPI register locking. Removed locking for reads from the ACPI
2408 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
2409 not required when reading the single-bit registers. The
2410 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
2411 This will improve performance for reads on these registers. ACPICA BZ 760.
2413 Fixed the parameter validation for AcpiRead/Write. Now return
2414 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
2415 the register has an address of zero. Previously, these cases simply returned
2416 AE_OK. For optional registers such as PM1B status/enable/control, the caller
2417 should check for a valid register address before calling. ACPICA BZ 748.
2419 Renamed the external ACPI bit register access functions. Renamed
2420 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
2421 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
2422 Also, restructured the code for these functions by simplifying the code path
2423 and condensing duplicate code to reduce code size.
2425 Added new functions to transparently handle the possibly split PM1 A/B
2426 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
2427 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
2430 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
2431 This function writes both of the PM1 control registers (A/B). These registers
2432 are different than the PM1 A/B status and enable registers in that different
2433 values can be written to the A/B registers. Most notably, the SLP_TYP bits
2434 can be different, as per the values returned from the _Sx predefined methods.
2436 Removed an extra register write within AcpiHwClearAcpiStatus. This function
2437 was writing an optional PM1B status register twice. The existing call to the
2438 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
2439 register. ACPICA BZ 751.
2441 Split out the PM1 Status registers from the FADT. Added new globals for these
2442 registers (A/B), similar to the way the PM1 Enable registers are handled.
2443 Instead of overloading the FADT Event Register blocks. This makes the code
2444 clearer and less prone to error.
2446 Fixed the warning message for when the platform contains too many ACPI tables
2447 for the default size of the global root table data structure. The calculation
2448 for the truncation value was incorrect.
2450 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
2451 obsolete macro, since it is now a simple reference to ->common.type. There
2452 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
2454 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
2455 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
2456 simply SLEEP_TYPE. ACPICA BZ 754.
2458 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
2459 function is only needed on 64-bit host operating systems and is thus not
2460 included for 32-bit hosts.
2462 Debug output: print the input and result for invocations of the _OSI reserved
2463 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
2464 verbosity of this debug level. Len Brown.
2466 Example Code and Data Size: These are the sizes for the OS-independent
2467 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2468 debug version of the code includes the debug output trace mechanism and has a
2469 much larger code and data size.
2472 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
2473 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
2475 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
2476 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
2478 2) iASL Compiler/Disassembler and Tools:
2480 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
2481 various legal performance profiles.
2483 ----------------------------------------
2484 23 January 2009. Summary of changes for version 20090123:
2486 1) ACPI CA Core Subsystem:
2488 Added the 2009 copyright to all module headers and signons. This affects
2489 virtually every file in the ACPICA core subsystem, the iASL compiler, and
2490 the tools/utilities.
2492 Implemented a change to allow the host to override any ACPI table, including
2493 dynamically loaded tables. Previously, only the DSDT could be replaced by the
2494 host. With this change, the AcpiOsTableOverride interface is called for each
2495 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
2496 a table is dynamically loaded via the AML Load operator.
2498 Updated FADT flag definitions, especially the Boot Architecture flags.
2500 Debugger: For the Find command, automatically pad the input ACPI name with
2501 underscores if the name is shorter than 4 characters. This enables a match
2502 with the actual namespace entry which is itself padded with underscores.
2504 Example Code and Data Size: These are the sizes for the OS-independent
2505 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2506 debug version of the code includes the debug output trace mechanism and has a
2507 much larger code and data size.
2510 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
2511 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
2513 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
2514 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
2516 2) iASL Compiler/Disassembler and Tools:
2518 Fix build error under Bison-2.4.
2520 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
2521 flags. Now decode all flags, regardless of the FADT version. Flag output
2522 includes the FADT version which first defined each flag.
2524 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
2525 DSDT). Windows only.
2527 ----------------------------------------
2528 04 December 2008. Summary of changes for version 20081204:
2530 1) ACPI CA Core Subsystem:
2532 The ACPICA Programmer Reference has been completely updated and revamped for
2533 this release. This includes updates to the external interfaces, OSL
2534 interfaces, the overview sections, and the debugger reference.
2536 Several new ACPICA interfaces have been implemented and documented in the
2537 programmer reference:
2538 AcpiReset - Writes the reset value to the FADT-defined reset register.
2539 AcpiDisableAllGpes - Disable all available GPEs.
2540 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
2541 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
2542 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
2543 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
2544 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
2546 Most of the public ACPI hardware-related interfaces have been moved to a new
2547 file, components/hardware/hwxface.c
2549 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
2550 register lengths within the FADT are now used, and the low level ACPI
2551 register access no longer hardcodes the ACPI register lengths. Given that
2552 there may be some risk in actually trusting the FADT register lengths, a run-
2553 time option was added to fall back to the default hardcoded lengths if the
2554 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
2555 option is set to true for now, and a warning is issued if a suspicious FADT
2556 register length is overridden with the default value.
2558 Fixed a reference count issue in NsRepairObject. This problem was introduced
2559 in version 20081031 as part of a fix to repair Buffer objects within
2562 Added semaphore support to the Linux/Unix application OS-services layer
2563 (OSL). ACPICA BZ 448. Lin Ming.
2565 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
2566 be implemented in the OSL, or will binary semaphores be used instead.
2568 Example Code and Data Size: These are the sizes for the OS-independent
2569 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2570 debug version of the code includes the debug output trace mechanism and has a
2571 much larger code and data size.
2574 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
2575 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
2577 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
2578 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
2580 2) iASL Compiler/Disassembler and Tools:
2582 iASL: Completed the '-e' option to include additional ACPI tables in order to
2583 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
2586 iASL: Removed the "named object in while loop" error. The compiler cannot
2587 determine how many times a loop will execute. ACPICA BZ 730.
2589 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
2592 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
2594 ----------------------------------------
2595 31 October 2008. Summary of changes for version 20081031:
2597 1) ACPI CA Core Subsystem:
2599 Restructured the ACPICA header files into public/private. acpi.h now includes
2600 only the "public" acpica headers. All other acpica headers are "private" and
2601 should not be included by acpica users. One new file, accommon.h is used to
2602 include the commonly used private headers for acpica code generation. Future
2603 plans include moving all private headers to a new subdirectory.
2605 Implemented an automatic Buffer->String return value conversion for
2606 predefined ACPI methods. For these methods (such as _BIF), added automatic
2607 conversion for return objects that are required to be a String, but a Buffer
2608 was found instead. This can happen when reading string battery data from an
2609 operation region, because it used to be difficult to convert the data from
2610 buffer to string from within the ASL. Ensures that the host OS is provided
2611 with a valid null-terminated string. Linux BZ 11822.
2613 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
2614 into two: one for the 32-bit vector, another for the 64-bit vector. This is
2615 required because the host OS must setup the wake much differently for each
2616 vector (real vs. protected mode, etc.) and the interface itself should not be
2617 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
2618 interface, as it served no purpose (only the firmware reads the vector, OS
2619 only writes the vector.) ACPICA BZ 731.
2621 Implemented a mechanism to escape infinite AML While() loops. Added a loop
2622 counter to force exit from AML While loops if the count becomes too large.
2623 This can occur in poorly written AML when the hardware does not respond
2624 within a while loop and the loop does not implement a timeout. The maximum
2625 loop count is configurable. A new exception code is returned when a loop is
2626 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
2628 Optimized the execution of AML While loops. Previously, a control state
2629 object was allocated and freed for each execution of the loop. The
2630 optimization is to simply reuse the control state for each iteration. This
2631 speeds up the raw loop execution time by about 5%.
2633 Enhanced the implicit return mechanism. For Windows compatibility, return an
2634 implicit integer of value zero for methods that contain no executable code.
2635 Such methods are seen in the field as stubs (presumably), and can cause
2636 drivers to fail if they expect a return value. Lin Ming.
2638 Allow multiple backslashes as root prefixes in namepaths. In a fully
2639 qualified namepath, allow multiple backslash prefixes. This can happen (and
2640 is seen in the field) because of the use of a double-backslash in strings
2641 (since backslash is the escape character) causing confusion. ACPICA BZ 739
2644 Emit a warning if two different FACS or DSDT tables are discovered in the
2645 FADT. Checks if there are two valid but different addresses for the FACS and
2646 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
2648 Consolidated the method argument count validation code. Merged the code that
2649 validates control method argument counts into the predefined validation
2650 module. Eliminates possible multiple warnings for incorrect argument counts.
2652 Implemented ACPICA example code. Includes code for ACPICA initialization,
2653 handler installation, and calling a control method. Available at
2654 source/tools/examples.
2656 Added a global pointer for FACS table to simplify internal FACS access. Use
2657 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
2658 This simplifies the code for the Global Lock and the Firmware Waking
2661 Example Code and Data Size: These are the sizes for the OS-independent
2662 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2663 debug version of the code includes the debug output trace mechanism and has a
2664 much larger code and data size.
2667 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
2668 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
2670 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
2671 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
2673 2) iASL Compiler/Disassembler and Tools:
2675 iASL: Improved disassembly of external method calls. Added the -e option to
2676 allow the inclusion of additional ACPI tables to help with the disassembly of
2677 method invocations and the generation of external declarations during the
2678 disassembly. Certain external method invocations cannot be disassembled
2679 properly without the actual declaration of the method. Use the -e option to
2680 include the table where the external method(s) are actually declared. Most
2681 useful for disassembling SSDTs that make method calls back to the master
2682 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
2683 -e dsdt.aml ssdt1.aml
2685 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
2686 problem where the use of an alias within a namepath would result in a not
2687 found error or cause the compiler to fault. Also now allows forward
2688 references from the Alias operator itself. ACPICA BZ 738.
2690 ----------------------------------------
2691 26 September 2008. Summary of changes for version 20080926:
2693 1) ACPI CA Core Subsystem:
2695 Designed and implemented a mechanism to validate predefined ACPI methods and
2696 objects. This code validates the predefined ACPI objects (objects whose names
2697 start with underscore) that appear in the namespace, at the time they are
2698 evaluated. The argument count and the type of the returned object are
2699 validated against the ACPI specification. The purpose of this validation is
2700 to detect problems with the BIOS-implemented predefined ACPI objects before
2701 the results are returned to the ACPI-related drivers. Future enhancements may
2702 include actual repair of incorrect return objects where possible. Two new
2703 files are nspredef.c and acpredef.h.
2705 Fixed a fault in the AML parser if a memory allocation fails during the Op
2706 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
2708 Fixed an issue with implicit return compatibility. This change improves the
2709 implicit return mechanism to be more compatible with the MS interpreter. Lin
2710 Ming, ACPICA BZ 349.
2712 Implemented support for zero-length buffer-to-string conversions. Allow zero
2713 length strings during interpreter buffer-to-string conversions. For example,
2714 during the ToDecimalString and ToHexString operators, as well as implicit
2715 conversions. Fiodor Suietov, ACPICA BZ 585.
2717 Fixed two possible memory leaks in the error exit paths of
2718 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
2719 similar in that they use a stack of state objects in order to eliminate
2720 recursion. The stack must be fully unwound and deallocated if an error
2721 occurs. Lin Ming. ACPICA BZ 383.
2723 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
2724 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
2725 Moore ACPICA BZ 442.
2727 Removed the obsolete version number in module headers. Removed the
2728 "$Revision" number that appeared in each module header. This version number
2729 was useful under SourceSafe and CVS, but has no meaning under git. It is not
2730 only incorrect, it could also be misleading.
2732 Example Code and Data Size: These are the sizes for the OS-independent
2733 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2734 debug version of the code includes the debug output trace mechanism and has a
2735 much larger code and data size.
2738 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2739 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
2741 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
2742 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
2744 ----------------------------------------
2745 29 August 2008. Summary of changes for version 20080829:
2747 1) ACPI CA Core Subsystem:
2749 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
2750 Reference. Changes include the elimination of cheating on the Object field
2751 for the DdbHandle subtype, addition of a reference class field to
2752 differentiate the various reference types (instead of an AML opcode), and the
2753 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
2755 Reduce an error to a warning for an incorrect method argument count.
2756 Previously aborted with an error if too few arguments were passed to a
2757 control method via the external ACPICA interface. Now issue a warning instead
2758 and continue. Handles the case where the method inadvertently declares too
2759 many arguments, but does not actually use the extra ones. Applies mainly to
2760 the predefined methods. Lin Ming. Linux BZ 11032.
2762 Disallow the evaluation of named object types with no intrinsic value. Return
2763 AE_TYPE for objects that have no value and therefore evaluation is undefined:
2764 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
2765 these types were allowed, but an exception would be generated at some point
2766 during the evaluation. Now, the error is generated up front.
2768 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
2769 (nsnames.c). Fixes a leak in the error exit path.
2771 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
2772 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
2773 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
2776 Removed obsolete and/or unused exception codes from the acexcep.h header.
2777 There is the possibility that certain device drivers may be affected if they
2778 use any of these exceptions.
2780 The ACPICA documentation has been added to the public git source tree, under
2781 acpica/documents. Included are the ACPICA programmer reference, the iASL
2782 compiler reference, and the changes.txt release logfile.
2784 Example Code and Data Size: These are the sizes for the OS-independent
2785 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2786 debug version of the code includes the debug output trace mechanism and has a
2787 much larger code and data size.
2790 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2791 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
2793 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2794 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
2796 2) iASL Compiler/Disassembler and Tools:
2798 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
2799 defines _SCP with 3 arguments. Previous versions defined it with only 1
2800 argument. iASL now allows both definitions.
2802 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
2803 length subtables when disassembling ACPI tables. Also fixed a couple of
2804 errors where a full 16-bit table type field was not extracted from the input
2807 acpisrc: Improve comment counting mechanism for generating source code
2808 statistics. Count first and last lines of multi-line comments as whitespace,
2809 not comment lines. Handle Linux legal header in addition to standard acpica
2812 ----------------------------------------
2814 29 July 2008. Summary of changes for version 20080729:
2816 1) ACPI CA Core Subsystem:
2818 Fix a possible deadlock in the GPE dispatch. Remove call to
2819 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
2820 to acquire the GPE lock but can deadlock since the GPE lock is already held
2821 at dispatch time. This code was introduced in version 20060831 as a response
2822 to Linux BZ 6881 and has since been removed from Linux.
2824 Add a function to dereference returned reference objects. Examines the return
2825 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
2826 automatically dereferenced in an attempt to return something useful (these
2827 reference types cannot be converted into an external ACPI_OBJECT.) Provides
2828 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
2830 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
2831 subtables for the MADT and one new subtable for the SRAT. Includes
2832 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
2833 Specification, June 2008.
2835 Additional error checking for pathname utilities. Add error check after all
2836 calls to AcpiNsGetPathnameLength. Add status return from
2837 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
2838 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
2840 Return status from the global init function AcpiUtGlobalInitialize. This is
2841 used by both the kernel subsystem and the utilities such as iASL compiler.
2842 The function could possibly fail when the caches are initialized. Yang Yi.
2844 Add a function to decode reference object types to strings. Created for
2845 improved error messages.
2847 Improve object conversion error messages. Better error messages during object
2848 conversion from internal to the external ACPI_OBJECT. Used for external calls
2849 to AcpiEvaluateObject.
2851 Example Code and Data Size: These are the sizes for the OS-independent
2852 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2853 debug version of the code includes the debug output trace mechanism and has a
2854 much larger code and data size.
2857 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
2858 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
2860 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2861 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
2863 2) iASL Compiler/Disassembler and Tools:
2865 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
2866 introduced in version 20080701. If the object being evaluated (via execute
2867 command) is not a method, the debugger can hang while trying to obtain non-
2868 existent parameters.
2870 iASL: relax error for using reserved "_T_x" identifiers. These names can
2871 appear in a disassembled ASL file if they were emitted by the original
2872 compiler. Instead of issuing an error or warning and forcing the user to
2873 manually change these names, issue a remark instead.
2875 iASL: error if named object created in while loop. Emit an error if any named
2876 object is created within a While loop. If allowed, this code will generate a
2877 run-time error on the second iteration of the loop when an attempt is made to
2878 create the same named object twice. ACPICA bugzilla 730.
2880 iASL: Support absolute pathnames for include files. Add support for absolute
2881 pathnames within the Include operator. previously, only relative pathnames
2884 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
2885 The ACPI spec requires one interrupt minimum. BZ 423
2887 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
2888 Handles the case for the Interrupt Resource Descriptor where
2889 the ResourceSource argument is omitted but ResourceSourceIndex
2890 is present. Now leave room for the Index. BZ 426
2892 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
2893 where an error message is emitted if the target does not exist. BZ 516
2895 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
2896 (get ACPI tables on Windows). This was apparently broken in version 20070919.
2898 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
2899 the EOF happens immediately after the last table in the input file. Print
2900 completion message. Previously, no message was displayed in this case.
2902 ----------------------------------------
2903 01 July 2008. Summary of changes for version 20080701:
2905 0) Git source tree / acpica.org
2907 Fixed a problem where a git-clone from http would not transfer the entire
2910 1) ACPI CA Core Subsystem:
2912 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
2913 enable bit. Now performs a read-change-write of the enable register instead
2914 of simply writing out the cached enable mask. This will prevent inadvertent
2915 enabling of GPEs if a rogue GPE is received during initialization (before GPE
2916 handlers are installed.)
2918 Implemented a copy for dynamically loaded tables. Previously, dynamically
2919 loaded tables were simply mapped - but on some machines this memory is
2920 corrupted after suspend. Now copy the table to a local buffer. For the
2921 OpRegion case, added checksum verify. Use the table length from the table
2922 header, not the region length. For the Buffer case, use the table length
2923 also. Dennis Noordsij, Bob Moore. BZ 10734
2925 Fixed a problem where the same ACPI table could not be dynamically loaded and
2926 unloaded more than once. Without this change, a table cannot be loaded again
2927 once it has been loaded/unloaded one time. The current mechanism does not
2928 unregister a table upon an unload. During a load, if the same table is found,
2929 this no longer returns an exception. BZ 722
2931 Fixed a problem where the wrong descriptor length was calculated for the
2932 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
2933 are calculated as 12 bytes long, but the actual length in the internal
2934 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
2935 by Linn Crosetto. BZ 728
2937 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
2938 by Load() did not have its reference count decremented during unload, leading
2939 to a memory leak. Lin Ming. BZ 727
2941 Fixed a possible memory leak when deleting thermal/processor objects. Any
2942 associated notify handlers (and objects) were not being deleted. Fiodor
2945 Fixed the ordering of the ASCII names in the global mutex table to match the
2946 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
2947 Vegard Nossum. BZ 726
2949 Enhanced the AcpiGetObjectInfo interface to return the number of required
2950 arguments if the object is a control method. Added this call to the debugger
2951 so the proper number of default arguments are passed to a method. This
2952 prevents a warning when executing methods from AcpiExec.
2954 Added a check for an invalid handle in AcpiGetObjectInfo. Return
2955 AE_BAD_PARAMETER if input handle is invalid. BZ 474
2957 Fixed an extraneous warning from exconfig.c on the 64-bit build.
2959 Example Code and Data Size: These are the sizes for the OS-independent
2960 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2961 debug version of the code includes the debug output trace mechanism and has a
2962 much larger code and data size.
2965 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
2966 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
2968 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
2969 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
2971 2) iASL Compiler/Disassembler and Tools:
2973 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
2974 resource descriptor names.
2976 iASL: Detect invalid ASCII characters in input (windows version). Removed the
2977 "-CF" flag from the flex compile, enables correct detection of non-ASCII
2978 characters in the input. BZ 441
2980 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
2981 "result of operation not used" warning when the DDB handle returned from
2982 LoadTable is not used. The warning is not needed. BZ 590
2984 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
2985 pass address of table to the AML. Added option to disable OpRegion simulation
2986 to allow creation of an OpRegion with a real address that was passed to _CFG.
2987 All of this allows testing of the Load and Unload operators from AcpiExec.
2989 Debugger: update tables command for unloaded tables. Handle unloaded tables
2990 and use the standard table header output routine.
2992 ----------------------------------------
2993 09 June 2008. Summary of changes for version 20080609:
2995 1) ACPI CA Core Subsystem:
2997 Implemented a workaround for reversed _PRT entries. A significant number of
2998 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
2999 change dynamically detects and repairs this problem. Provides compatibility
3000 with MS ACPI. BZ 6859
3002 Simplified the internal ACPI hardware interfaces to eliminate the locking
3003 flag parameter from Register Read/Write. Added a new external interface,
3004 AcpiGetRegisterUnlocked.
3006 Fixed a problem where the invocation of a GPE control method could hang. This
3007 was a regression introduced in 20080514. The new method argument count
3008 validation mechanism can enter an infinite loop when a GPE method is
3009 dispatched. Problem fixed by removing the obsolete code that passed GPE block
3010 information to the notify handler via the control method parameter pointer.
3012 Fixed a problem where the _SST execution status was incorrectly returned to
3013 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
3014 20080514. _SST is optional and a NOT_FOUND exception should never be
3017 Fixed a problem where a deleted object could be accessed from within the AML
3018 parser. This was a regression introduced in version 20080123 as a fix for the
3019 Unload operator. Lin Ming. BZ 10669
3021 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
3022 and eliminated the use of a negative index in a loop. Operands are now
3023 displayed in the correct order, not backwards. This also fixes a regression
3024 introduced in 20080514 on 64-bit systems where the elimination of
3025 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
3027 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
3028 path did not delete a locally allocated structure.
3030 Updated definitions for the DMAR and SRAT tables to synchronize with the
3031 current specifications. Includes disassembler support.
3033 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
3034 loop termination value was used. Loop terminated on iteration early, missing
3035 one mutex. Linn Crosetto
3037 Example Code and Data Size: These are the sizes for the OS-independent
3038 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3039 debug version of the code includes the debug output trace mechanism and has a
3040 much larger code and data size.
3043 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
3044 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
3046 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
3047 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
3049 2) iASL Compiler/Disassembler and Tools:
3051 Disassembler: Implemented support for EisaId() within _CID objects. Now
3052 disassemble integer _CID objects back to EisaId invocations, including
3053 multiple integers within _CID packages. Includes single-step support for
3056 Disassembler: Added support for DMAR and SRAT table definition changes.
3058 ----------------------------------------
3059 14 May 2008. Summary of changes for version 20080514:
3061 1) ACPI CA Core Subsystem:
3063 Fixed a problem where GPEs were enabled too early during the ACPICA
3064 initialization. This could lead to "handler not installed" errors on some
3065 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
3066 ensures that all operation regions and devices throughout the namespace have
3067 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
3069 Implemented a change to the enter sleep code. Moved execution of the _GTS
3070 method to just before setting sleep enable bit. The execution was moved from
3071 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
3072 immediately before the SLP_EN bit is set, as per the ACPI specification.
3075 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
3076 the GPE, even if ACPICA thinks that that it is already disabled. It is
3077 possible that the AML or some other code has enabled the GPE unbeknownst to
3080 Fixed a problem with the Field operator where zero-length fields would return
3081 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
3082 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
3084 Implemented a fix for the Load operator, now load the table at the namespace
3085 root. This reverts a change introduced in version 20071019. The table is now
3086 loaded at the namespace root even though this goes against the ACPI
3087 specification. This provides compatibility with other ACPI implementations.
3088 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
3090 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
3091 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
3092 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
3093 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
3094 signatures, ACPICA must be compatible. BZ 10454.
3096 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
3097 fields to the exception string arrays to eliminate a -1 subtraction on the
3100 Updated the debug tracking macros to reduce overall code and data size.
3101 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
3102 instead of pointers to static strings. Jan Beulich and Bob Moore.
3104 Implemented argument count checking in control method invocation via
3105 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
3106 many. This applies only to extern programmatic control method execution, not
3107 method-to-method calls within the AML. Lin Ming.
3109 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
3110 longer needed, especially with the removal of 16-bit support. It was replaced
3111 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
3112 32/64-bit platforms is required.
3114 Added the C const qualifier for appropriate string constants -- mostly
3115 MODULE_NAME and printf format strings. Jan Beulich.
3117 Example Code and Data Size: These are the sizes for the OS-independent
3118 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3119 debug version of the code includes the debug output trace mechanism and has a
3120 much larger code and data size.
3123 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
3124 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
3126 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
3127 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
3129 2) iASL Compiler/Disassembler and Tools:
3131 Implemented ACPI table revision ID validation in the disassembler. Zero is
3132 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
3133 means 32-bit and this is unusual. 2 or greater is 64-bit.
3135 ----------------------------------------
3136 21 March 2008. Summary of changes for version 20080321:
3138 1) ACPI CA Core Subsystem:
3140 Implemented an additional change to the GPE support in order to suppress
3141 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
3142 disable incoming GPEs that are neither enabled nor disabled -- meaning that
3143 the GPE is unknown to the system. This should prevent future interrupt floods
3144 from that GPE. BZ 6217 (Zhang Rui)
3146 Fixed a problem where NULL package elements were not returned to the
3147 AcpiEvaluateObject interface correctly. The element was simply ignored
3148 instead of returning a NULL ACPI_OBJECT package element, potentially causing
3149 a buffer overflow and/or confusing the caller who expected a fixed number of
3150 elements. BZ 10132 (Lin Ming, Bob Moore)
3152 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
3153 Qword), Field, BankField, and IndexField operators when invoked from inside
3154 an executing control method. In this case, these operators created namespace
3155 nodes that were incorrectly left marked as permanent nodes instead of
3156 temporary nodes. This could cause a problem if there is race condition
3157 between an exiting control method and a running namespace walk. (Reported by
3160 Fixed a problem where the CreateField and CreateXXXField operators would
3161 incorrectly allow duplicate names (the name of the field) with no exception
3164 Implemented several changes for Notify handling. Added support for new Notify
3165 values (ACPI 2.0+) and improved the Notify debug output. Notify on
3166 PowerResource objects is no longer allowed, as per the ACPI specification.
3167 (Bob Moore, Zhang Rui)
3169 All Reference Objects returned via the AcpiEvaluateObject interface are now
3170 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
3171 NULL objects - either NULL package elements or unresolved named references.
3173 Fixed a problem where an extraneous debug message was produced for package
3174 objects (when debugging enabled). The message "Package List length larger
3175 than NumElements count" is now produced in the correct case, and is now an
3176 error message rather than a debug message. Added a debug message for the
3177 opposite case, where NumElements is larger than the Package List (the package
3178 will be padded out with NULL elements as per the ACPI spec.)
3180 Implemented several improvements for the output of the ASL "Debug" object to
3181 clarify and keep all data for a given object on one output line.
3183 Fixed two size calculation issues with the variable-length Start Dependent
3184 resource descriptor.
3186 Example Code and Data Size: These are the sizes for the OS-independent
3187 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3188 debug version of the code includes the debug output trace mechanism and has
3189 a much larger code and data size.
3192 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
3193 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
3195 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
3196 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
3198 2) iASL Compiler/Disassembler and Tools:
3200 Fixed a problem with the use of the Switch operator where execution of the
3201 containing method by multiple concurrent threads could cause an
3202 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
3203 actual Switch opcode, it must be simulated with local named temporary
3204 variables and if/else pairs. The solution chosen was to mark any method that
3205 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
3207 ----------------------------------------
3208 13 February 2008. Summary of changes for version 20080213:
3210 1) ACPI CA Core Subsystem:
3212 Implemented another MS compatibility design change for GPE/Notify handling.
3213 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
3214 complete first. It is expected that the OSL will queue the enable request
3215 behind all pending notify requests (may require changes to the local host OSL
3216 in AcpiOsExecute). Alexey Starikovskiy.
3218 Fixed a problem where buffer and package objects passed as arguments to a
3219 control method via the external AcpiEvaluateObject interface could cause an
3220 AE_AML_INTERNAL exception depending on the order and type of operators
3221 executed by the target control method.
3223 Fixed a problem where resource descriptor size optimization could cause a
3224 problem when a _CRS resource template is passed to a _SRS method. The _SRS
3225 resource template must use the same descriptors (with the same size) as
3226 returned from _CRS. This change affects the following resource descriptors:
3227 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
3229 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
3230 objects did not perform an implicit conversion as it should. These types must
3231 retain their initial type permanently as per the ACPI specification. However,
3232 a CopyObject to all other object types should not perform an implicit
3233 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
3235 Fixed a problem with the AcpiGetDevices interface where the mechanism to
3236 match device CIDs did not examine the entire list of available CIDs, but
3237 instead aborted on the first non-matching CID. Andrew Patterson.
3239 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
3240 inadvertently changed to return a 16-bit value instead of a 32-bit value,
3241 truncating the upper dword of a 64-bit value. This macro is only used to
3242 display debug output, so no incorrect calculations were made. Also,
3243 reimplemented the macro so that a 64-bit shift is not performed by
3244 inefficient compilers.
3246 Added missing va_end statements that should correspond with each va_start
3249 Example Code and Data Size: These are the sizes for the OS-independent
3250 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3251 debug version of the code includes the debug output trace mechanism and has
3252 a much larger code and data size.
3255 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
3256 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
3258 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
3259 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
3261 2) iASL Compiler/Disassembler and Tools:
3263 Implemented full disassembler support for the following new ACPI tables:
3264 BERT, EINJ, and ERST. Implemented partial disassembler support for the
3265 complicated HEST table. These tables support the Windows Hardware Error
3266 Architecture (WHEA).
3268 ----------------------------------------
3269 23 January 2008. Summary of changes for version 20080123:
3271 1) ACPI CA Core Subsystem:
3273 Added the 2008 copyright to all module headers and signons. This affects
3274 virtually every file in the ACPICA core subsystem, the iASL compiler, and
3275 the tools/utilities.
3277 Fixed a problem with the SizeOf operator when used with Package and Buffer
3278 objects. These objects have deferred execution for some arguments, and the
3279 execution is now completed before the SizeOf is executed. This problem caused
3280 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
3283 Implemented an enhancement to the interpreter "slack mode". In the absence of
3284 an explicit return or an implicitly returned object from the last executed
3285 opcode, a control method will now implicitly return an integer of value 0 for
3286 Microsoft compatibility. (Lin Ming) BZ 392
3288 Fixed a problem with the Load operator where an exception was not returned in
3289 the case where the table is already loaded. (Lin Ming) BZ 463
3291 Implemented support for the use of DDBHandles as an Indexed Reference, as per
3292 the ACPI spec. (Lin Ming) BZ 486
3294 Implemented support for UserTerm (Method invocation) for the Unload operator
3295 as per the ACPI spec. (Lin Ming) BZ 580
3297 Fixed a problem with the LoadTable operator where the OemId and OemTableId
3298 input strings could cause unexpected failures if they were shorter than the
3299 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
3301 Implemented support for UserTerm (Method invocation) for the Unload operator
3302 as per the ACPI spec. (Lin Ming) BZ 580
3304 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
3305 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
3307 Example Code and Data Size: These are the sizes for the OS-independent
3308 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3309 debug version of the code includes the debug output trace mechanism and has
3310 a much larger code and data size.
3313 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
3314 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
3316 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
3317 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
3319 2) iASL Compiler/Disassembler and Tools:
3321 Implemented support in the disassembler for checksum validation on incoming
3322 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
3323 header dump at the start of the disassembly.
3325 Implemented additional debugging information in the namespace listing file
3326 created during compilation. In addition to the namespace hierarchy, the full
3327 pathname to each namespace object is displayed.
3329 Fixed a problem with the disassembler where invalid ACPI tables could cause
3330 faults or infinite loops.
3332 Fixed an unexpected parse error when using the optional "parameter types"
3333 list in a control method declaration. (Lin Ming) BZ 397
3335 Fixed a problem where two External declarations with the same name did not
3336 cause an error (Lin Ming) BZ 509
3338 Implemented support for full TermArgs (adding Argx, Localx and method
3339 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
3342 ----------------------------------------
3343 19 December 2007. Summary of changes for version 20071219:
3345 1) ACPI CA Core Subsystem:
3347 Implemented full support for deferred execution for the TermArg string
3348 arguments for DataTableRegion. This enables forward references and full
3349 operand resolution for the three string arguments. Similar to OperationRegion
3350 deferred argument execution.) Lin Ming. BZ 430
3352 Implemented full argument resolution support for the BankValue argument to
3353 BankField. Previously, only constants were supported, now any TermArg may be
3354 used. Lin Ming BZ 387, 393
3356 Fixed a problem with AcpiGetDevices where the search of a branch of the
3357 device tree could be terminated prematurely. In accordance with the ACPI
3358 specification, the search down the current branch is terminated if a device
3359 is both not present and not functional (instead of just not present.) Yakui
3362 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
3363 the underlying AML code changed the GPE enable registers. Now, any unknown
3364 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
3365 instead of simply ignored. Rui Zhang.
3367 Fixed a problem with Index Fields where the Index register was incorrectly
3368 limited to a maximum of 32 bits. Now any size may be used.
3370 Fixed a couple memory leaks associated with "implicit return" objects when
3371 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
3373 Example Code and Data Size: These are the sizes for the OS-independent
3374 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3375 debug version of the code includes the debug output trace mechanism and has
3376 a much larger code and data size.
3379 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
3380 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
3382 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
3383 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
3385 ----------------------------------------
3386 14 November 2007. Summary of changes for version 20071114:
3388 1) ACPI CA Core Subsystem:
3390 Implemented event counters for each of the Fixed Events, the ACPI SCI
3391 (interrupt) itself, and control methods executed. Named
3392 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
3393 should be useful for debugging and statistics.
3395 Implemented a new external interface, AcpiGetStatistics, to retrieve the
3396 contents of the various event counters. Returns the current values for
3397 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
3398 AcpiMethodCount. The interface can be expanded in the future if new counters
3399 are added. Device drivers should use this interface rather than access the
3402 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
3403 the ShortDivide function worked incorrectly, causing problems with the BCD
3404 functions with large input values. A truncation from 64-bit to 32-bit
3405 inadvertently occurred. Internal BZ 435. Lin Ming
3407 Fixed a problem with Index references passed as method arguments. References
3408 passed as arguments to control methods were dereferenced immediately (before
3409 control was passed to the called method). The references are now correctly
3410 passed directly to the called method. BZ 5389. Lin Ming
3412 Fixed a problem with CopyObject used in conjunction with the Index operator.
3413 The reference was incorrectly dereferenced before the copy. The reference is
3414 now correctly copied. BZ 5391. Lin Ming
3416 Fixed a problem with Control Method references within Package objects. These
3417 references are now correctly generated. This completes the package
3418 construction overhaul that began in version 20071019.
3420 Example Code and Data Size: These are the sizes for the OS-independent
3421 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3422 debug version of the code includes the debug output trace mechanism and has
3423 a much larger code and data size.
3426 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
3427 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
3429 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
3430 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
3433 2) iASL Compiler/Disassembler and Tools:
3435 The AcpiExec utility now installs handlers for all of the predefined
3436 Operation Region types. New types supported are: PCI_Config, CMOS, and
3439 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
3440 bit) address fields for the DSDT and FACS within the FADT were not being
3441 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
3444 ----------------------------------------
3445 19 October 2007. Summary of changes for version 20071019:
3447 1) ACPI CA Core Subsystem:
3449 Fixed a problem with the Alias operator when the target of the alias is a
3450 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
3451 Processor, and ThermalZone. In these cases, any children of the original
3452 operator could not be accessed via the alias, potentially causing unexpected
3453 AE_NOT_FOUND exceptions. (BZ 9067)
3455 Fixed a problem with the Package operator where all named references were
3456 created as object references and left otherwise unresolved. According to the
3457 ACPI specification, a Package can only contain Data Objects or references to
3458 control methods. The implication is that named references to Data Objects
3459 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
3460 immediately upon package creation. This is the approach taken with this
3461 change. References to all other named objects (Methods, Devices, Scopes,
3462 etc.) are all now properly created as reference objects. (BZ 5328)
3464 Reverted a change to Notify handling that was introduced in version
3465 20070508. This version changed the Notify handling from asynchronous to
3466 fully synchronous (Device driver Notify handling with respect to the Notify
3467 ASL operator). It was found that this change caused more problems than it
3468 solved and was removed by most users.
3470 Fixed a problem with the Increment and Decrement operators where the type of
3471 the target object could be unexpectedly and incorrectly changed. (BZ 353)
3474 Fixed a problem with the Load and LoadTable operators where the table
3475 location within the namespace was ignored. Instead, the table was always
3476 loaded into the root or current scope. Lin Ming.
3478 Fixed a problem with the Load operator when loading a table from a buffer
3479 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
3481 Fixed a problem with the Debug object where a store of a DdbHandle reference
3482 object to the Debug object could cause a fault.
3484 Added a table checksum verification for the Load operator, in the case where
3485 the load is from a buffer. (BZ 578).
3487 Implemented additional parameter validation for the LoadTable operator. The
3488 length of the input strings SignatureString, OemIdString, and OemTableId are
3489 now checked for maximum lengths. (BZ 582) Lin Ming.
3491 Example Code and Data Size: These are the sizes for the OS-independent
3492 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3493 debug version of the code includes the debug output trace mechanism and has
3494 a much larger code and data size.
3497 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
3498 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
3500 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
3501 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
3504 2) iASL Compiler/Disassembler:
3506 Fixed a problem where if a single file was specified and the file did not
3507 exist, no error message was emitted. (Introduced with wildcard support in
3510 ----------------------------------------
3511 19 September 2007. Summary of changes for version 20070919:
3513 1) ACPI CA Core Subsystem:
3515 Designed and implemented new external interfaces to install and remove
3516 handlers for ACPI table-related events. Current events that are defined are
3517 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
3518 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
3519 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
3521 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
3522 (acpi_serialized option on Linux) could cause some systems to hang during
3523 initialization. (Bob Moore) BZ 8171
3525 Fixed a problem where objects of certain types (Device, ThermalZone,
3526 Processor, PowerResource) can be not found if they are declared and
3527 referenced from within the same control method (Lin Ming) BZ 341
3529 Example Code and Data Size: These are the sizes for the OS-independent
3530 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3531 debug version of the code includes the debug output trace mechanism and has
3532 a much larger code and data size.
3535 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
3536 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
3538 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
3539 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
3542 2) iASL Compiler/Disassembler:
3544 Implemented support to allow multiple files to be compiled/disassembled in a
3545 single invocation. This includes command line wildcard support for both the
3546 Windows and Unix versions of the compiler. This feature simplifies the
3547 disassembly and compilation of multiple ACPI tables in a single directory.
3549 ----------------------------------------
3550 08 May 2007. Summary of changes for version 20070508:
3552 1) ACPI CA Core Subsystem:
3554 Implemented a Microsoft compatibility design change for the handling of the
3555 Notify AML operator. Previously, notify handlers were dispatched and
3556 executed completely asynchronously in a deferred thread. The new design
3557 still executes the notify handlers in a different thread, but the original
3558 thread that executed the Notify() now waits at a synchronization point for
3559 the notify handler to complete. Some machines depend on a synchronous Notify
3560 operator in order to operate correctly.
3562 Implemented support to allow Package objects to be passed as method
3563 arguments to the external AcpiEvaluateObject interface. Previously, this
3564 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
3565 implemented since there were no reserved control methods that required it
3568 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
3569 contained invalid non-zero values in reserved fields could cause later
3570 failures because these fields have meaning in later revisions of the FADT.
3571 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
3572 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
3574 Fixed a problem where the Global Lock handle was not properly updated if a
3575 thread that acquired the Global Lock via executing AML code then attempted
3576 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
3579 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
3580 could be corrupted if the interrupt being removed was at the head of the
3581 list. Reported by Linn Crosetto.
3583 Example Code and Data Size: These are the sizes for the OS-independent
3584 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3585 debug version of the code includes the debug output trace mechanism and has
3586 a much larger code and data size.
3589 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3590 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
3592 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
3593 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
3595 ----------------------------------------
3596 20 March 2007. Summary of changes for version 20070320:
3598 1) ACPI CA Core Subsystem:
3600 Implemented a change to the order of interpretation and evaluation of AML
3601 operand objects within the AML interpreter. The interpreter now evaluates
3602 operands in the order that they appear in the AML stream (and the
3603 corresponding ASL code), instead of in the reverse order (after the entire
3604 operand list has been parsed). The previous behavior caused several subtle
3605 incompatibilities with the Microsoft AML interpreter as well as being
3606 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
3608 Implemented a change to the ACPI Global Lock support. All interfaces to the
3609 global lock now allow the same thread to acquire the lock multiple times.
3610 This affects the AcpiAcquireGlobalLock external interface to the global lock
3611 as well as the internal use of the global lock to support AML fields -- a
3612 control method that is holding the global lock can now simultaneously access
3613 AML fields that require global lock protection. Previously, in both cases,
3614 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
3615 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
3616 Controller. There is no change to the behavior of the AML Acquire operator,
3617 as this can already be used to acquire a mutex multiple times by the same
3618 thread. BZ 8066. With assistance from Alexey Starikovskiy.
3620 Fixed a problem where invalid objects could be referenced in the AML
3621 Interpreter after error conditions. During operand evaluation, ensure that
3622 the internal "Return Object" field is cleared on error and only valid
3623 pointers are stored there. Caused occasional access to deleted objects that
3624 resulted in "large reference count" warning messages. Valery Podrezov.
3626 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
3627 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
3630 Fixed an internal problem with the handling of result objects on the
3631 interpreter result stack. BZ 7872. Valery Podrezov.
3633 Removed obsolete code that handled the case where AML_NAME_OP is the target
3634 of a reference (Reference.Opcode). This code was no longer necessary. BZ
3635 7874. Valery Podrezov.
3637 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
3638 remnant from the previously discontinued 16-bit support.
3640 Example Code and Data Size: These are the sizes for the OS-independent
3641 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3642 debug version of the code includes the debug output trace mechanism and has
3643 a much larger code and data size.
3646 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3647 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
3649 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3650 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
3652 ----------------------------------------
3653 26 January 2007. Summary of changes for version 20070126:
3655 1) ACPI CA Core Subsystem:
3657 Added the 2007 copyright to all module headers and signons. This affects
3658 virtually every file in the ACPICA core subsystem, the iASL compiler, and
3661 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
3662 during a table load. A bad pointer was passed in the case where the DSDT is
3663 overridden, causing a fault in this case.
3665 Example Code and Data Size: These are the sizes for the OS-independent
3666 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3667 debug version of the code includes the debug output trace mechanism and has
3668 a much larger code and data size.
3671 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3672 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
3674 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3675 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
3677 ----------------------------------------
3678 15 December 2006. Summary of changes for version 20061215:
3680 1) ACPI CA Core Subsystem:
3682 Support for 16-bit ACPICA has been completely removed since it is no longer
3683 necessary and it clutters the code. All 16-bit macros, types, and
3684 conditional compiles have been removed, cleaning up and simplifying the code
3685 across the entire subsystem. DOS support is no longer needed since the
3686 bootable Linux firmware kit is now available.
3688 The handler for the Global Lock is now removed during AcpiTerminate to
3689 enable a clean subsystem restart, via the implementation of the
3690 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
3693 Implemented enhancements to the multithreading support within the debugger
3694 to enable improved multithreading debugging and evaluation of the subsystem.
3697 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
3698 memory used during the execution, as well as the maximum memory consumed by
3699 each of the various object types. (Valery Podrezov)
3701 Example Code and Data Size: These are the sizes for the OS-independent
3702 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3703 debug version of the code includes the debug output trace mechanism and has
3704 a much larger code and data size.
3707 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
3708 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
3710 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3711 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
3714 2) iASL Compiler/Disassembler and Tools:
3716 AcpiExec: Implemented a new option (-m) to display full memory use
3717 statistics upon subsystem/program termination. (Valery Podrezov)
3719 ----------------------------------------
3720 09 November 2006. Summary of changes for version 20061109:
3722 1) ACPI CA Core Subsystem:
3724 Optimized the Load ASL operator in the case where the source operand is an
3725 operation region. Simply map the operation region memory, instead of
3726 performing a bytewise read. (Region must be of type SystemMemory, see
3729 Fixed the Load ASL operator for the case where the source operand is a
3730 region field. A buffer object is also allowed as the source operand. BZ 480
3732 Fixed a problem where the Load ASL operator allowed the source operand to be
3733 an operation region of any type. It is now restricted to regions of type
3734 SystemMemory, as per the ACPI specification. BZ 481
3736 Additional cleanup and optimizations for the new Table Manager code.
3738 AcpiEnable will now fail if all of the required ACPI tables are not loaded
3739 (FADT, FACS, DSDT). BZ 477
3741 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
3742 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
3743 manually optimized to be aligned and will not work if it is byte-packed.
3745 Example Code and Data Size: These are the sizes for the OS-independent
3746 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3747 debug version of the code includes the debug output trace mechanism and has
3748 a much larger code and data size.
3751 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
3752 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
3754 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
3755 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
3758 2) iASL Compiler/Disassembler and Tools:
3760 Fixed a problem where the presence of the _OSI predefined control method
3761 within complex expressions could cause an internal compiler error.
3763 AcpiExec: Implemented full region support for multiple address spaces.
3764 SpaceId is now part of the REGION object. BZ 429
3766 ----------------------------------------
3767 11 October 2006. Summary of changes for version 20061011:
3769 1) ACPI CA Core Subsystem:
3771 Completed an AML interpreter performance enhancement for control method
3772 execution. Previously a 2-pass parse/execution, control methods are now
3773 completely parsed and executed in a single pass. This improves overall
3774 interpreter performance by ~25%, reduces code size, and reduces CPU stack
3775 use. (Valery Podrezov + interpreter changes in version 20051202 that
3776 eliminated namespace loading during the pass one parse.)
3778 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
3779 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
3780 obtained and also checked for an ID match.
3782 Implemented additional support for the PCI _ADR execution: upsearch until a
3783 device scope is found before executing _ADR. This allows PCI_Config
3784 operation regions to be declared locally within control methods underneath
3787 Fixed a problem with a possible race condition between threads executing
3788 AcpiWalkNamespace and the AML interpreter. This condition was removed by
3789 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
3790 entries created during any concurrent control method execution. An
3791 additional namespace race condition is known to exist between
3792 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
3795 Restructured the AML ParseLoop function, breaking it into several
3796 subfunctions in order to reduce CPU stack use and improve maintainability.
3799 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
3800 of prefix handle and pathname. BZ 478
3802 Example Code and Data Size: These are the sizes for the OS-independent
3803 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3804 debug version of the code includes the debug output trace mechanism and has
3805 a much larger code and data size.
3808 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3809 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
3811 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
3812 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
3814 2) iASL Compiler/Disassembler and Tools:
3816 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
3817 to restore original behavior.
3819 ----------------------------------------
3820 27 September 2006. Summary of changes for version 20060927:
3822 1) ACPI CA Core Subsystem:
3824 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
3825 These functions now use a spinlock for mutual exclusion and the interrupt
3826 level indication flag is not needed.
3828 Fixed a problem with the Global Lock where the lock could appear to be
3829 obtained before it is actually obtained. The global lock semaphore was
3830 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
3833 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
3834 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
3836 Example Code and Data Size: These are the sizes for the OS-independent
3837 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3838 debug version of the code includes the debug output trace mechanism and has
3839 a much larger code and data size.
3842 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3843 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
3845 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3846 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
3849 2) iASL Compiler/Disassembler and Tools:
3851 Fixed a compilation problem with the pre-defined Resource Descriptor field
3852 names where an "object does not exist" error could be incorrectly generated
3853 if the parent ResourceTemplate pathname places the template within a
3854 different namespace scope than the current scope. (BZ 7212)
3856 Fixed a problem where the compiler could hang after syntax errors detected
3857 in an ElseIf construct. (BZ 453)
3859 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
3860 operator. An incorrect output filename was produced when this parameter was
3861 a null string (""). Now, the original input filename is used as the AML
3862 output filename, with an ".aml" extension.
3864 Implemented a generic batch command mode for the AcpiExec utility (execute
3865 any AML debugger command) (Valery Podrezov).
3867 ----------------------------------------
3868 12 September 2006. Summary of changes for version 20060912:
3870 1) ACPI CA Core Subsystem:
3872 Enhanced the implementation of the "serialized mode" of the interpreter
3873 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
3874 specified, instead of creating a serialization semaphore per control method,
3875 the interpreter lock is simply no longer released before a blocking
3876 operation during control method execution. This effectively makes the AML
3877 Interpreter single-threaded. The overhead of a semaphore per-method is
3880 Fixed a regression where an error was no longer emitted if a control method
3881 attempts to create 2 objects of the same name. This once again returns
3882 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
3883 will dynamically serialize the control method to possible prevent future
3886 Integrated a fix for a problem with PCI Express HID detection in the PCI
3887 Config Space setup procedure. (BZ 7145)
3889 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
3890 AcpiHwInitialize function - the FADT registers are now validated when the
3893 Added two new warnings during FADT verification - 1) if the FADT is larger
3894 than the largest known FADT version, and 2) if there is a mismatch between a
3895 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
3897 Example Code and Data Size: These are the sizes for the OS-independent
3898 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3899 debug version of the code includes the debug output trace mechanism and has
3900 a much larger code and data size.
3903 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
3904 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
3906 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3907 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
3910 2) iASL Compiler/Disassembler and Tools:
3912 Fixed a problem with the implementation of the Switch() operator where the
3913 temporary variable was declared too close to the actual Switch, instead of
3914 at method level. This could cause a problem if the Switch() operator is
3915 within a while loop, causing an error on the second iteration. (BZ 460)
3917 Disassembler - fix for error emitted for unknown type for target of scope
3918 operator. Now, ignore it and continue.
3920 Disassembly of an FADT now verifies the input FADT and reports any errors
3921 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
3923 Disassembly of raw data buffers with byte initialization data now prefixes
3924 each output line with the current buffer offset.
3926 Disassembly of ASF! table now includes all variable-length data fields at
3927 the end of some of the subtables.
3929 The disassembler now emits a comment if a buffer appears to be a
3930 ResourceTemplate, but cannot be disassembled as such because the EndTag does
3931 not appear at the very end of the buffer.
3933 AcpiExec - Added the "-t" command line option to enable the serialized mode
3934 of the AML interpreter.
3936 ----------------------------------------
3937 31 August 2006. Summary of changes for version 20060831:
3939 1) ACPI CA Core Subsystem:
3941 Miscellaneous fixes for the Table Manager:
3942 - Correctly initialize internal common FADT for all 64-bit "X" fields
3943 - Fixed a couple table mapping issues during table load
3944 - Fixed a couple alignment issues for IA64
3945 - Initialize input array to zero in AcpiInitializeTables
3946 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
3949 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
3950 immediately disabled to prevent the waking GPE from firing again and to
3951 prevent other wake GPEs from interrupting the wake process.
3953 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
3954 be used for debugging systems with a large number of ACPI interrupts.
3956 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
3957 both the ACPICA headers and the disassembler.
3959 Example Code and Data Size: These are the sizes for the OS-independent
3960 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3961 debug version of the code includes the debug output trace mechanism and has
3962 a much larger code and data size.
3965 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
3966 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
3968 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
3969 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
3972 2) iASL Compiler/Disassembler and Tools:
3974 Disassembler support for the DMAR ACPI table.
3976 ----------------------------------------
3977 23 August 2006. Summary of changes for version 20060823:
3979 1) ACPI CA Core Subsystem:
3981 The Table Manager component has been completely redesigned and
3982 reimplemented. The new design is much simpler, and reduces the overall code
3983 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
3984 now possible to obtain the ACPI tables very early during kernel
3985 initialization, even before dynamic memory management is initialized.
3986 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
3988 Obsolete ACPICA interfaces:
3990 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
3992 - AcpiLoadTable: Not needed.
3993 - AcpiUnloadTable: Not needed.
3995 New ACPICA interfaces:
3997 - AcpiInitializeTables: Must be called before the table manager can be used.
3998 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
3999 allocated memory after it becomes available.
4000 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
4003 Other ACPICA changes:
4005 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
4006 AcpiOsUnmapMemory to free this mapping.
4007 - AcpiGetTable returns the actual mapped table. The mapping is managed
4008 internally and must not be deleted by the caller. Use of this interface
4009 causes no additional dynamic memory allocation.
4010 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
4011 it appeared to be unused.
4012 - The interface to AcpiOsMapMemory has changed to be consistent with the
4013 other allocation interfaces.
4014 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
4016 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
4017 bit platforms. Was previously 64 bits on all platforms.
4018 - The interface to the ACPI Global Lock acquire/release macros have changed
4019 slightly since ACPICA no longer keeps a local copy of the FACS with a
4020 constructed pointer to the actual global lock.
4022 Porting to the new table manager:
4024 - AcpiInitializeTables: Must be called once, and can be called anytime
4025 during the OS initialization process. It allows the host to specify an area
4026 of memory to be used to store the internal version of the RSDT/XSDT (root
4027 table). This allows the host to access ACPI tables before memory management
4028 is initialized and running.
4029 - AcpiReallocateRootTable: Can be called after memory management is running
4030 to copy the root table to a dynamically allocated array, freeing up the
4031 scratch memory specified in the call to AcpiInitializeTables.
4032 - AcpiSubsystemInitialize: This existing interface is independent of the
4033 Table Manager, and does not have to be called before the Table Manager can
4034 be used, it only must be called before the rest of ACPICA can be used.
4035 - ACPI Tables: Some changes have been made to the names and structure of the
4036 actbl.h and actbl1.h header files and may require changes to existing code.
4037 For example, bitfields have been completely removed because of their lack of
4038 portability across C compilers.
4039 - Update interfaces to the Global Lock acquire/release macros if local
4040 versions are used. (see acwin.h)
4042 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
4046 Example Code and Data Size: These are the sizes for the OS-independent
4047 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4048 debug version of the code includes the debug output trace mechanism and has
4049 a much larger code and data size.
4052 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
4053 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
4055 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
4056 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
4059 2) iASL Compiler/Disassembler and Tools:
4061 No changes for this release.
4063 ----------------------------------------
4064 21 July 2006. Summary of changes for version 20060721:
4066 1) ACPI CA Core Subsystem:
4068 The full source code for the ASL test suite used to validate the iASL
4069 compiler and the ACPICA core subsystem is being released with the ACPICA
4070 source for the first time. The source is contained in a separate package and
4071 consists of over 1100 files that exercise all ASL/AML operators. The package
4072 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
4075 Completed a new design and implementation for support of the ACPI Global
4076 Lock. On the OS side, the global lock is now treated as a standard AML
4077 mutex. Previously, multiple OS threads could "acquire" the global lock
4078 simultaneously. However, this could cause the BIOS to be starved out of the
4079 lock - especially in cases such as the Embedded Controller driver where
4080 there is a tight coupling between the OS and the BIOS.
4082 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
4083 The Global Lock interrupt handler no longer queues the execution of a
4084 separate thread to signal the global lock semaphore. Instead, the semaphore
4085 is signaled directly from the interrupt handler.
4087 Implemented support within the AML interpreter for package objects that
4088 contain a larger AML length (package list length) than the package element
4089 count. In this case, the length of the package is truncated to match the
4090 package element count. Some BIOS code apparently modifies the package length
4091 on the fly, and this change supports this behavior. Provides compatibility
4092 with the MS AML interpreter. (With assistance from Fiodor Suietov)
4094 Implemented a temporary fix for the BankValue parameter of a Bank Field to
4095 support all constant values, now including the Zero and One opcodes.
4096 Evaluation of this parameter must eventually be converted to a full TermArg
4097 evaluation. A not-implemented error is now returned (temporarily) for non-
4098 constant values for this parameter.
4100 Fixed problem reports (Fiodor Suietov) integrated:
4101 - Fix for premature object deletion after CopyObject on Operation Region (BZ
4104 Example Code and Data Size: These are the sizes for the OS-independent
4105 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4106 debug version of the code includes the debug output trace mechanism and has
4107 a much larger code and data size.
4110 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
4111 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
4113 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
4114 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
4117 2) iASL Compiler/Disassembler and Tools:
4119 No changes for this release.
4121 ----------------------------------------
4122 07 July 2006. Summary of changes for version 20060707:
4124 1) ACPI CA Core Subsystem:
4126 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
4127 that do not allow the initialization of address pointers within packed
4128 structures - even though the hardware itself may support misaligned
4129 transfers. Some of the debug data structures are packed by default to
4132 Added an error message for the case where AcpiOsGetThreadId() returns zero.
4133 A non-zero value is required by the core ACPICA code to ensure the proper
4134 operation of AML mutexes and recursive control methods.
4136 The DSDT is now the only ACPI table that determines whether the AML
4137 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
4138 the hooks for per-table 32/64 switching have been removed from the code. A
4139 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
4141 Fixed a possible leak of an OwnerID in the error path of
4142 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
4143 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
4144 when using the AcpiTbDeleteTablesByType interface (with assistance from
4147 Fixed a problem with Serialized control methods where the semaphore
4148 associated with the method could be over-signaled after multiple method
4151 Fixed two issues with the locking of the internal namespace data structure.
4152 Both the Unload() operator and AcpiUnloadTable interface now lock the
4153 namespace during the namespace deletion associated with the table unload
4154 (with assistance from Linn Crosetto.)
4156 Fixed problem reports (Valery Podrezov) integrated:
4157 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
4159 Fixed problem reports (Fiodor Suietov) integrated:
4160 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
4161 - On Address Space handler deletion, needless deactivation call (BZ 374)
4162 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
4163 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
4165 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
4166 - Minimum Length of RSDT should be validated (BZ 379)
4167 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
4169 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
4172 Example Code and Data Size: These are the sizes for the OS-independent
4173 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4174 debug version of the code includes the debug output trace mechanism and has
4175 a much larger code and data size.
4178 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
4179 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
4181 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
4182 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
4185 2) iASL Compiler/Disassembler and Tools:
4187 Fixed problem reports:
4188 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
4191 ----------------------------------------
4192 23 June 2006. Summary of changes for version 20060623:
4194 1) ACPI CA Core Subsystem:
4196 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
4197 allows the type to be customized to the host OS for improved efficiency
4198 (since a spinlock is usually a very small object.)
4200 Implemented support for "ignored" bits in the ACPI registers. According to
4201 the ACPI specification, these bits should be preserved when writing the
4202 registers via a read/modify/write cycle. There are 3 bits preserved in this
4203 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
4205 Implemented the initial deployment of new OSL mutex interfaces. Since some
4206 host operating systems have separate mutex and semaphore objects, this
4207 feature was requested. The base code now uses mutexes (and the new mutex
4208 interfaces) wherever a binary semaphore was used previously. However, for
4209 the current release, the mutex interfaces are defined as macros to map them
4210 to the existing semaphore interfaces. Therefore, no OSL changes are required
4211 at this time. (See acpiosxf.h)
4213 Fixed several problems with the support for the control method SyncLevel
4214 parameter. The SyncLevel now works according to the ACPI specification and
4215 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
4216 is a property of the executing thread. Mutual exclusion for control methods
4217 is now implemented with a mutex instead of a semaphore.
4219 Fixed three instances of the use of the C shift operator in the bitfield
4220 support code (exfldio.c) to avoid the use of a shift value larger than the
4221 target data width. The behavior of C compilers is undefined in this case and
4222 can cause unpredictable results, and therefore the case must be detected and
4223 avoided. (Fiodor Suietov)
4225 Added an info message whenever an SSDT or OEM table is loaded dynamically
4226 via the Load() or LoadTable() ASL operators. This should improve debugging
4227 capability since it will show exactly what tables have been loaded (beyond
4228 the tables present in the RSDT/XSDT.)
4230 Example Code and Data Size: These are the sizes for the OS-independent
4231 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4232 debug version of the code includes the debug output trace mechanism and has
4233 a much larger code and data size.
4236 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
4237 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
4239 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
4240 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
4243 2) iASL Compiler/Disassembler and Tools:
4245 No changes for this release.
4247 ----------------------------------------
4248 08 June 2006. Summary of changes for version 20060608:
4250 1) ACPI CA Core Subsystem:
4252 Converted the locking mutex used for the ACPI hardware to a spinlock. This
4253 change should eliminate all problems caused by attempting to acquire a
4254 semaphore at interrupt level, and it means that all ACPICA external
4255 interfaces that directly access the ACPI hardware can be safely called from
4256 interrupt level. OSL code that implements the semaphore interfaces should be
4257 able to eliminate any workarounds for being called at interrupt level.
4259 Fixed a regression introduced in 20060526 where the ACPI device
4260 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
4261 did not have an optional _INI method.
4263 Fixed an IndexField issue where a write to the Data Register should be
4264 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
4267 Fixed problem reports (Valery Podrezov) integrated:
4268 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
4270 Fixed problem reports (Fiodor Suietov) integrated:
4271 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
4273 Removed four global mutexes that were obsolete and were no longer being
4276 Example Code and Data Size: These are the sizes for the OS-independent
4277 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4278 debug version of the code includes the debug output trace mechanism and has
4279 a much larger code and data size.
4282 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
4283 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
4285 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
4286 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
4289 2) iASL Compiler/Disassembler and Tools:
4291 Fixed a fault when using -g option (get tables from registry) on Windows
4294 Fixed problem reports integrated:
4295 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
4296 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
4298 - Global table revision override (-r) is ignored (BZ 413)
4300 ----------------------------------------
4301 26 May 2006. Summary of changes for version 20060526:
4303 1) ACPI CA Core Subsystem:
4305 Restructured, flattened, and simplified the internal interfaces for
4306 namespace object evaluation - resulting in smaller code, less CPU stack use,
4307 and fewer interfaces. (With assistance from Mikhail Kouzmich)
4309 Fixed a problem with the CopyObject operator where the first parameter was
4310 not typed correctly for the parser, interpreter, compiler, and disassembler.
4311 Caused various errors and unexpected behavior.
4313 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
4314 produced incorrect results with some C compilers. Since the behavior of C
4315 compilers when the shift value is larger than the datatype width is
4316 apparently not well defined, the interpreter now detects this condition and
4317 simply returns zero as expected in all such cases. (BZ 395)
4319 Fixed problem reports (Valery Podrezov) integrated:
4320 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
4321 - Allow interpreter to handle nested method declarations (BZ 5361)
4323 Fixed problem reports (Fiodor Suietov) integrated:
4324 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
4325 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
4326 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
4327 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
4328 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
4329 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
4330 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
4331 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
4332 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
4333 - Status of the Global Initialization Handler call not used (BZ 366)
4334 - Incorrect object parameter to Global Initialization Handler (BZ 367)
4336 Example Code and Data Size: These are the sizes for the OS-independent
4337 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4338 debug version of the code includes the debug output trace mechanism and has
4339 a much larger code and data size.
4342 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
4343 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
4345 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
4346 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
4349 2) iASL Compiler/Disassembler and Tools:
4351 Modified the parser to allow the names IO, DMA, and IRQ to be used as
4352 namespace identifiers with no collision with existing resource descriptor
4353 macro names. This provides compatibility with other ASL compilers and is
4354 most useful for disassembly/recompilation of existing tables without parse
4355 errors. (With assistance from Thomas Renninger)
4357 Disassembler: fixed an incorrect disassembly problem with the
4358 DataTableRegion and CopyObject operators. Fixed a possible fault during
4359 disassembly of some Alias operators.
4361 ----------------------------------------
4362 12 May 2006. Summary of changes for version 20060512:
4364 1) ACPI CA Core Subsystem:
4366 Replaced the AcpiOsQueueForExecution interface with a new interface named
4367 AcpiOsExecute. The major difference is that the new interface does not have
4368 a Priority parameter, this appeared to be useless and has been replaced by a
4369 Type parameter. The Type tells the host what type of execution is being
4370 requested, such as global lock handler, notify handler, GPE handler, etc.
4371 This allows the host to queue and execute the request as appropriate for the
4372 request type, possibly using different work queues and different priorities
4373 for the various request types. This enables fixes for multithreading
4374 deadlock problems such as BZ #5534, and will require changes to all existing
4375 OS interface layers. (Alexey Starikovskiy and Bob Moore)
4377 Fixed a possible memory leak associated with the support for the so-called
4378 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
4381 Fixed a problem with the Load() operator where a table load from an
4382 operation region could overwrite an internal table buffer by up to 7 bytes
4383 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
4385 Example Code and Data Size: These are the sizes for the OS-independent
4386 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4387 debug version of the code includes the debug output trace mechanism and has
4388 a much larger code and data size.
4391 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
4392 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
4394 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
4395 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
4399 2) iASL Compiler/Disassembler and Tools:
4401 Disassembler: Implemented support to cross reference the internal namespace
4402 and automatically generate ASL External() statements for symbols not defined
4403 within the current table being disassembled. This will simplify the
4404 disassembly and recompilation of interdependent tables such as SSDTs since
4405 these statements will no longer have to be added manually.
4407 Disassembler: Implemented experimental support to automatically detect
4408 invocations of external control methods and generate appropriate External()
4409 statements. This is problematic because the AML cannot be correctly parsed
4410 until the number of arguments for each control method is known. Currently,
4411 standalone method invocations and invocations as the source operand of a
4412 Store() statement are supported.
4414 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
4415 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
4416 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
4417 more readable and likely closer to the original ASL source.
4419 ----------------------------------------
4420 21 April 2006. Summary of changes for version 20060421:
4422 1) ACPI CA Core Subsystem:
4424 Removed a device initialization optimization introduced in 20051216 where
4425 the _STA method was not run unless an _INI was also present for the same
4426 device. This optimization could cause problems because it could allow _INI
4427 methods to be run within a not-present device subtree. (If a not-present
4428 device had no _INI, _STA would not be run, the not-present status would not
4429 be discovered, and the children of the device would be incorrectly
4432 Implemented a new _STA optimization where namespace subtrees that do not
4433 contain _INI are identified and ignored during device initialization.
4434 Selectively running _STA can significantly improve boot time on large
4435 machines (with assistance from Len Brown.)
4437 Implemented support for the device initialization case where the returned
4438 _STA flags indicate a device not-present but functioning. In this case, _INI
4439 is not run, but the device children are examined for presence, as per the
4442 Implemented an additional change to the IndexField support in order to
4443 conform to MS behavior. The value written to the Index Register is not
4444 simply a byte offset, it is a byte offset in units of the access width of
4445 the parent Index Field. (Fiodor Suietov)
4447 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
4448 interface is called during the creation of all AML operation regions, and
4449 allows the host OS to exert control over what addresses it will allow the
4450 AML code to access. Operation Regions whose addresses are disallowed will
4451 cause a runtime exception when they are actually accessed (will not affect
4452 or abort table loading.) See oswinxf or osunixxf for an example
4455 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
4456 interface allows the host OS to match the various "optional"
4457 interface/behavior strings for the _OSI predefined control method as
4458 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
4459 for an example implementation.
4461 Restructured and corrected various problems in the exception handling code
4462 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
4463 (with assistance from Takayoshi Kochi.)
4465 Modified the Linux source converter to ignore quoted string literals while
4466 converting identifiers from mixed to lower case. This will correct problems
4467 with the disassembler and other areas where such strings must not be
4470 The ACPI_FUNCTION_* macros no longer require quotes around the function
4471 name. This allows the Linux source converter to convert the names, now that
4472 the converter ignores quoted strings.
4474 Example Code and Data Size: These are the sizes for the OS-independent
4475 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4476 debug version of the code includes the debug output trace mechanism and has
4477 a much larger code and data size.
4481 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
4482 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
4484 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
4485 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
4488 2) iASL Compiler/Disassembler and Tools:
4490 Implemented 3 new warnings for iASL, and implemented multiple warning levels
4493 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
4494 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
4495 check for the possible timeout, a warning is issued.
4497 2) Useless operators: If an ASL operator does not specify an optional target
4498 operand and it also does not use the function return value from the
4499 operator, a warning is issued since the operator effectively does nothing.
4501 3) Unreferenced objects: If a namespace object is created, but never
4502 referenced, a warning is issued. This is a warning level 2 since there are
4503 cases where this is ok, such as when a secondary table is loaded that uses
4504 the unreferenced objects. Even so, care is taken to only flag objects that
4505 don't look like they will ever be used. For example, the reserved methods
4506 (starting with an underscore) are usually not referenced because it is
4507 expected that the OS will invoke them.
4509 ----------------------------------------
4510 31 March 2006. Summary of changes for version 20060331:
4512 1) ACPI CA Core Subsystem:
4514 Implemented header file support for the following additional ACPI tables:
4515 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
4516 all current and known ACPI tables are now defined in the ACPICA headers and
4517 are available for use by device drivers and other software.
4519 Implemented support to allow tables that contain ACPI names with invalid
4520 characters to be loaded. Previously, this would cause the table load to
4521 fail, but since there are several known cases of such tables on existing
4522 machines, this change was made to enable ACPI support for them. Also, this
4523 matches the behavior of the Microsoft ACPI implementation.
4525 Fixed a couple regressions introduced during the memory optimization in the
4526 20060317 release. The namespace node definition required additional
4527 reorganization and an internal datatype that had been changed to 8-bit was
4528 restored to 32-bit. (Valery Podrezov)
4530 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
4531 could be passed through to AcpiOsReleaseObject which is unexpected. Such
4532 null pointers are now trapped and ignored, matching the behavior of the
4533 previous implementation before the deployment of AcpiOsReleaseObject.
4534 (Valery Podrezov, Fiodor Suietov)
4536 Fixed a memory mapping leak during the deletion of a SystemMemory operation
4537 region where a cached memory mapping was not deleted. This became a
4538 noticeable problem for operation regions that are defined within frequently
4539 used control methods. (Dana Meyers)
4541 Reorganized the ACPI table header files into two main files: one for the
4542 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
4543 ACPI tables that are consumed by the drivers and other software. The various
4544 FADT definitions were merged into one common section and three different
4545 tables (ACPI 1.0, 1.0+, and 2.0)
4547 Example Code and Data Size: These are the sizes for the OS-independent
4548 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4549 debug version of the code includes the debug output trace mechanism and has
4550 a much larger code and data size.
4553 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
4554 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
4556 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
4557 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
4560 2) iASL Compiler/Disassembler and Tools:
4562 Disassembler: Implemented support to decode and format all non-AML ACPI
4563 tables (tables other than DSDTs and SSDTs.) This includes the new tables
4564 added to the ACPICA headers, therefore all current and known ACPI tables are
4567 Disassembler: The change to allow ACPI names with invalid characters also
4568 enables the disassembly of such tables. Invalid characters within names are
4569 changed to '*' to make the name printable; the iASL compiler will still
4570 generate an error for such names, however, since this is an invalid ACPI
4573 Implemented an option for AcpiXtract (-a) to extract all tables found in the
4574 input file. The default invocation extracts only the DSDTs and SSDTs.
4576 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
4577 makefile for the AcpiXtract utility.
4579 ----------------------------------------
4580 17 March 2006. Summary of changes for version 20060317:
4582 1) ACPI CA Core Subsystem:
4584 Implemented the use of a cache object for all internal namespace nodes.
4585 Since there are about 1000 static nodes in a typical system, this will
4586 decrease memory use for cache implementations that minimize per-allocation
4587 overhead (such as a slab allocator.)
4589 Removed the reference count mechanism for internal namespace nodes, since it
4590 was deemed unnecessary. This reduces the size of each namespace node by
4591 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
4592 and 32 bytes for the 64-bit case.
4594 Optimized several internal data structures to reduce object size on 64-bit
4595 platforms by packing data within the 64-bit alignment. This includes the
4596 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
4597 instances corresponding to the namespace objects.
4599 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
4602 Split the allocation tracking mechanism out to a separate file, from
4603 utalloc.c to uttrack.c. This mechanism appears to be only useful for
4604 application-level code. Kernels may wish to not include uttrack.c in
4607 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
4608 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
4611 Code and Data Size: These are the sizes for the acpica.lib produced by the
4612 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
4613 driver or OSPM code. The debug version of the code includes the debug output
4614 trace mechanism and has a much larger code and data size. Note that these
4615 values will vary depending on the efficiency of the compiler and the
4616 compiler options used during generation.
4619 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
4620 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
4622 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
4623 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
4626 2) iASL Compiler/Disassembler and Tools:
4628 Implemented an ANSI C version of the acpixtract utility. This version will
4629 automatically extract the DSDT and all SSDTs from the input acpidump text
4630 file and dump the binary output to separate files. It can also display a
4631 summary of the input file including the headers for each table found and
4632 will extract any single ACPI table, with any signature. (See
4633 source/tools/acpixtract)
4635 ----------------------------------------
4636 10 March 2006. Summary of changes for version 20060310:
4638 1) ACPI CA Core Subsystem:
4640 Tagged all external interfaces to the subsystem with the new
4641 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
4642 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
4643 macro. The default definition is NULL.
4645 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
4646 This allows the host to define this as necessary to simplify kernel
4647 integration. The default definition is ACPI_NATIVE_UINT.
4649 Fixed two interpreter problems related to error processing, the deletion of
4650 objects, and placing invalid pointers onto the internal operator result
4651 stack. BZ 6028, 6151 (Valery Podrezov)
4653 Increased the reference count threshold where a warning is emitted for large
4654 reference counts in order to eliminate unnecessary warnings on systems with
4655 large namespaces (especially 64-bit.) Increased the value from 0x400 to
4658 Due to universal disagreement as to the meaning of the 'c' in the calloc()
4659 function, the ACPI_MEM_CALLOCATE macro has been renamed to
4660 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
4661 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
4664 Code and Data Size: These are the sizes for the acpica.lib produced by the
4665 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
4666 driver or OSPM code. The debug version of the code includes the debug output
4667 trace mechanism and has a much larger code and data size. Note that these
4668 values will vary depending on the efficiency of the compiler and the
4669 compiler options used during generation.
4672 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
4673 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
4675 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
4676 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
4679 2) iASL Compiler/Disassembler:
4681 Disassembler: implemented support for symbolic resource descriptor
4682 references. If a CreateXxxxField operator references a fixed offset within a
4683 resource descriptor, a name is assigned to the descriptor and the offset is
4684 translated to the appropriate resource tag and pathname. The addition of
4685 this support brings the disassembled code very close to the original ASL
4686 source code and helps eliminate run-time errors when the disassembled code
4687 is modified (and recompiled) in such a way as to invalidate the original
4690 Implemented support for a Descriptor Name as the last parameter to the ASL
4691 Register() macro. This parameter was inadvertently left out of the ACPI
4692 specification, and will be added for ACPI 3.0b.
4694 Fixed a problem where the use of the "_OSI" string (versus the full path
4695 "\_OSI") caused an internal compiler error. ("No back ptr to op")
4697 Fixed a problem with the error message that occurs when an invalid string is
4698 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
4699 The correct message is now displayed.
4701 ----------------------------------------
4702 17 February 2006. Summary of changes for version 20060217:
4704 1) ACPI CA Core Subsystem:
4706 Implemented a change to the IndexField support to match the behavior of the
4707 Microsoft AML interpreter. The value written to the Index register is now a
4708 byte offset, no longer an index based upon the width of the Data register.
4709 This should fix IndexField problems seen on some machines where the Data
4710 register is not exactly one byte wide. The ACPI specification will be
4711 clarified on this point.
4713 Fixed a problem where several resource descriptor types could overrun the
4714 internal descriptor buffer due to size miscalculation: VendorShort,
4715 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
4716 affect all platforms.
4718 Fixed a problem where individual resource descriptors were misaligned within
4719 the internal buffer, causing alignment faults on IA64 platforms.
4721 Code and Data Size: These are the sizes for the acpica.lib produced by the
4722 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
4723 driver or OSPM code. The debug version of the code includes the debug output
4724 trace mechanism and has a much larger code and data size. Note that these
4725 values will vary depending on the efficiency of the compiler and the
4726 compiler options used during generation.
4729 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
4730 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
4732 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
4733 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
4736 2) iASL Compiler/Disassembler:
4738 Implemented support for new reserved names: _WDG and _WED are Microsoft
4739 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
4740 defined method (Throttling Depth Limit.)
4742 Fixed a problem where a zero-length VendorShort or VendorLong resource
4743 descriptor was incorrectly emitted as a descriptor of length one.
4745 ----------------------------------------
4746 10 February 2006. Summary of changes for version 20060210:
4748 1) ACPI CA Core Subsystem:
4750 Removed a couple of extraneous ACPI_ERROR messages that appeared during
4751 normal execution. These became apparent after the conversion from
4754 Fixed a problem where the CreateField operator could hang if the BitIndex or
4755 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
4757 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
4758 failed with an exception. This also fixes a couple of related RefOf and
4759 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
4761 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
4762 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
4765 Implemented a memory cleanup at the end of the execution of each iteration
4766 of an AML While() loop, preventing the accumulation of outstanding objects.
4767 (Valery Podrezov, BZ 5427)
4769 Eliminated a chunk of duplicate code in the object resolution code. (Valery
4772 Fixed several warnings during the 64-bit code generation.
4774 The AcpiSrc source code conversion tool now inserts one line of whitespace
4775 after an if() statement that is followed immediately by a comment, improving
4776 readability of the Linux code.
4778 Code and Data Size: The current and previous library sizes for the core
4779 subsystem are shown below. These are the code and data sizes for the
4780 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4781 values do not include any ACPI driver or OSPM code. The debug version of the
4782 code includes the debug output trace mechanism and has a much larger code
4783 and data size. Note that these values will vary depending on the efficiency
4784 of the compiler and the compiler options used during generation.
4787 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
4788 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
4790 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
4791 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
4794 2) iASL Compiler/Disassembler:
4796 Fixed a problem with the disassembly of a BankField operator with a complex
4797 expression for the BankValue parameter.
4799 ----------------------------------------
4800 27 January 2006. Summary of changes for version 20060127:
4802 1) ACPI CA Core Subsystem:
4804 Implemented support in the Resource Manager to allow unresolved namestring
4805 references within resource package objects for the _PRT method. This support
4806 is in addition to the previously implemented unresolved reference support
4807 within the AML parser. If the interpreter slack mode is enabled, these
4808 unresolved references will be passed through to the caller as a NULL package
4811 Implemented and deployed new macros and functions for error and warning
4812 messages across the subsystem. These macros are simpler and generate less
4813 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
4814 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
4815 macros remain defined to allow ACPI drivers time to migrate to the new
4818 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
4819 Acquire/Release Lock OSL interfaces.
4821 Fixed a problem where Alias ASL operators are sometimes not correctly
4822 resolved, in both the interpreter and the iASL compiler.
4824 Fixed several problems with the implementation of the ConcatenateResTemplate
4825 ASL operator. As per the ACPI specification, zero length buffers are now
4826 treated as a single EndTag. One-length buffers always cause a fatal
4827 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
4828 cause a fatal exception.
4830 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
4831 interface. (With assistance from Thomas Renninger)
4833 Code and Data Size: The current and previous library sizes for the core
4834 subsystem are shown below. These are the code and data sizes for the
4835 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4836 values do not include any ACPI driver or OSPM code. The debug version of the
4837 code includes the debug output trace mechanism and has a much larger code
4838 and data size. Note that these values will vary depending on the efficiency
4839 of the compiler and the compiler options used during generation.
4842 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
4843 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
4845 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
4846 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
4849 2) iASL Compiler/Disassembler:
4851 Fixed an internal error that was generated for any forward references to ASL
4854 ----------------------------------------
4855 13 January 2006. Summary of changes for version 20060113:
4857 1) ACPI CA Core Subsystem:
4859 Added 2006 copyright to all module headers and signons. This affects
4860 virtually every file in the ACPICA core subsystem, iASL compiler, and the
4863 Enhanced the ACPICA error reporting in order to simplify user migration to
4864 the non-debug version of ACPICA. Replaced all instances of the
4865 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
4866 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
4867 respectively. This preserves all error and warning messages in the non-debug
4868 version of the ACPICA code (this has been referred to as the "debug lite"
4869 option.) Over 200 cases were converted to create a total of over 380
4870 error/warning messages across the ACPICA code. This increases the code and
4871 data size of the default non-debug version of the code somewhat (about 13K),
4872 but all error/warning reporting may be disabled if desired (and code
4873 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
4874 configuration option. The size of the debug version of ACPICA remains about
4877 Fixed a memory leak within the AML Debugger "Set" command. One object was
4878 not properly deleted for every successful invocation of the command.
4880 Code and Data Size: The current and previous library sizes for the core
4881 subsystem are shown below. These are the code and data sizes for the
4882 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4883 values do not include any ACPI driver or OSPM code. The debug version of the
4884 code includes the debug output trace mechanism and has a much larger code
4885 and data size. Note that these values will vary depending on the efficiency
4886 of the compiler and the compiler options used during generation.
4889 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
4890 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
4892 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
4893 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
4896 2) iASL Compiler/Disassembler:
4898 The compiler now officially supports the ACPI 3.0a specification that was
4899 released on December 30, 2005. (Specification is available at www.acpi.info)
4901 ----------------------------------------
4902 16 December 2005. Summary of changes for version 20051216:
4904 1) ACPI CA Core Subsystem:
4906 Implemented optional support to allow unresolved names within ASL Package
4907 objects. A null object is inserted in the package when a named reference
4908 cannot be located in the current namespace. Enabled via the interpreter
4909 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
4910 that contain such code.
4912 Implemented an optimization to the initialization sequence that can improve
4913 boot time. During ACPI device initialization, the _STA method is now run if
4914 and only if the _INI method exists. The _STA method is used to determine if
4915 the device is present; An _INI can only be run if _STA returns present, but
4916 it is a waste of time to run the _STA method if the _INI does not exist.
4917 (Prototype and assistance from Dong Wei)
4919 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
4920 available in the current compiler. Otherwise, the default (void *) cast is
4923 Fixed some possible memory leaks found within the execution path of the
4924 Break, Continue, If, and CreateField operators. (Valery Podrezov)
4926 Fixed a problem introduced in the 20051202 release where an exception is
4927 generated during method execution if a control method attempts to declare
4930 Moved resource descriptor string constants that are used by both the AML
4931 disassembler and AML debugger to the common utilities directory so that
4932 these components are independent.
4934 Implemented support in the AcpiExec utility (-e switch) to globally ignore
4935 exceptions during control method execution (method is not aborted.)
4937 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
4940 Code and Data Size: The current and previous library sizes for the core
4941 subsystem are shown below. These are the code and data sizes for the
4942 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4943 values do not include any ACPI driver or OSPM code. The debug version of the
4944 code includes the debug output trace mechanism and has a much larger code
4945 and data size. Note that these values will vary depending on the efficiency
4946 of the compiler and the compiler options used during generation.
4949 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4950 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
4952 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
4953 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
4956 2) iASL Compiler/Disassembler:
4958 Fixed a problem where a CPU stack overflow fault could occur if a recursive
4959 method call was made from within a Return statement.
4961 ----------------------------------------
4962 02 December 2005. Summary of changes for version 20051202:
4964 1) ACPI CA Core Subsystem:
4966 Modified the parsing of control methods to no longer create namespace
4967 objects during the first pass of the parse. Objects are now created only
4968 during the execute phase, at the moment the namespace creation operator is
4969 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
4970 should eliminate ALREADY_EXISTS exceptions seen on some machines where
4971 reentrant control methods are protected by an AML mutex. The mutex will now
4972 correctly block multiple threads from attempting to create the same object
4975 Increased the number of available Owner Ids for namespace object tracking
4976 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
4977 some machines with a large number of ACPI tables (either static or dynamic).
4979 Fixed a problem with the AcpiExec utility where a fault could occur when the
4980 -b switch (batch mode) is used.
4982 Enhanced the namespace dump routine to output the owner ID for each
4985 Code and Data Size: The current and previous library sizes for the core
4986 subsystem are shown below. These are the code and data sizes for the
4987 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4988 values do not include any ACPI driver or OSPM code. The debug version of the
4989 code includes the debug output trace mechanism and has a much larger code
4990 and data size. Note that these values will vary depending on the efficiency
4991 of the compiler and the compiler options used during generation.
4994 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4995 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
4997 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4998 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
5001 2) iASL Compiler/Disassembler:
5003 Fixed a parse error during compilation of certain Switch/Case constructs. To
5004 simplify the parse, the grammar now allows for multiple Default statements
5005 and this error is now detected and flagged during the analysis phase.
5007 Disassembler: The disassembly now includes the contents of the original
5008 table header within a comment at the start of the file. This includes the
5009 name and version of the original ASL compiler.
5011 ----------------------------------------
5012 17 November 2005. Summary of changes for version 20051117:
5014 1) ACPI CA Core Subsystem:
5016 Fixed a problem in the AML parser where the method thread count could be
5017 decremented below zero if any errors occurred during the method parse phase.
5018 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
5019 This also fixed a related regression with the mechanism that detects and
5020 corrects methods that cannot properly handle reentrancy (related to the
5021 deployment of the new OwnerId mechanism.)
5023 Eliminated the pre-parsing of control methods (to detect errors) during
5024 table load. Related to the problem above, this was causing unwind issues if
5025 any errors occurred during the parse, and it seemed to be overkill. A table
5026 load should not be aborted if there are problems with any single control
5027 method, thus rendering this feature rather pointless.
5029 Fixed a problem with the new table-driven resource manager where an internal
5030 buffer overflow could occur for small resource templates.
5032 Implemented a new external interface, AcpiGetVendorResource. This interface
5033 will find and return a vendor-defined resource descriptor within a _CRS or
5034 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
5036 Removed the length limit (200) on string objects as per the upcoming ACPI
5037 3.0A specification. This affects the following areas of the interpreter: 1)
5038 any implicit conversion of a Buffer to a String, 2) a String object result
5039 of the ASL Concatentate operator, 3) the String object result of the ASL
5042 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
5043 on a semaphore object would incorrectly timeout. This allows the
5044 multithreading features of the AcpiExec utility to work properly under
5047 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
5048 the recently added file named "utresrc.c".
5050 Code and Data Size: The current and previous library sizes for the core
5051 subsystem are shown below. These are the code and data sizes for the
5052 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
5053 values do not include any ACPI driver or OSPM code. The debug version of the
5054 code includes the debug output trace mechanism and has a much larger code
5055 and data size. Note that these values will vary depending on the efficiency
5056 of the compiler and the compiler options used during generation.
5059 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
5060 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
5062 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
5063 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
5066 2) iASL Compiler/Disassembler:
5068 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
5069 specification. For the iASL compiler, this means that string literals within
5070 the source ASL can be of any length.
5072 Enhanced the listing output to dump the AML code for resource descriptors
5073 immediately after the ASL code for each descriptor, instead of in a block at
5074 the end of the entire resource template.
5076 Enhanced the compiler debug output to dump the entire original parse tree
5077 constructed during the parse phase, before any transforms are applied to the
5078 tree. The transformed tree is dumped also.
5080 ----------------------------------------
5081 02 November 2005. Summary of changes for version 20051102:
5083 1) ACPI CA Core Subsystem:
5085 Modified the subsystem initialization sequence to improve GPE support. The
5086 GPE initialization has been split into two parts in order to defer execution
5087 of the _PRW methods (Power Resources for Wake) until after the hardware is
5088 fully initialized and the SCI handler is installed. This allows the _PRW
5089 methods to access fields protected by the Global Lock. This will fix systems
5090 where a NO_GLOBAL_LOCK exception has been seen during initialization.
5092 Converted the ACPI internal object disassemble and display code within the
5093 AML debugger to fully table-driven operation, reducing code size and
5094 increasing maintainability.
5096 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
5097 in the 20051021 release.
5099 Implemented support for "local" internal ACPI object types within the
5100 debugger "Object" command and the AcpiWalkNamespace external interfaces.
5101 These local types include RegionFields, BankFields, IndexFields, Alias, and
5104 Moved common AML resource handling code into a new file, "utresrc.c". This
5105 code is shared by both the Resource Manager and the AML Debugger.
5107 Code and Data Size: The current and previous library sizes for the core
5108 subsystem are shown below. These are the code and data sizes for the
5109 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
5110 values do not include any ACPI driver or OSPM code. The debug version of the
5111 code includes the debug output trace mechanism and has a much larger code
5112 and data size. Note that these values will vary depending on the efficiency
5113 of the compiler and the compiler options used during generation.
5116 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
5117 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
5119 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
5120 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
5123 2) iASL Compiler/Disassembler:
5125 Fixed a problem with very large initializer lists (more than 4000 elements)
5126 for both Buffer and Package objects where the parse stack could overflow.
5128 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
5129 characters within comment fields. The scan is now always performed and is no
5130 longer optional, detecting invalid characters within a source file
5131 immediately rather than during the parse phase or later.
5133 Enhanced the ASL grammar definition to force early reductions on all list-
5134 style grammar elements so that the overall parse stack usage is greatly
5135 reduced. This should improve performance and reduce the possibility of parse
5138 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
5139 with the addition of a %expected statement, the compiler generates from
5140 source with no warnings.
5142 Fixed a possible segment fault in the disassembler if the input filename
5143 does not contain a "dot" extension (Thomas Renninger).
5145 ----------------------------------------
5146 21 October 2005. Summary of changes for version 20051021:
5148 1) ACPI CA Core Subsystem:
5150 Implemented support for the EM64T and other x86-64 processors. This
5151 essentially entails recognizing that these processors support non-aligned
5152 memory transfers. Previously, all 64-bit processors were assumed to lack
5153 hardware support for non-aligned transfers.
5155 Completed conversion of the Resource Manager to nearly full table-driven
5156 operation. Specifically, the resource conversion code (convert AML to
5157 internal format and the reverse) and the debug code to dump internal
5158 resource descriptors are fully table-driven, reducing code and data size and
5159 improving maintainability.
5161 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
5162 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
5163 Alexey Starikovskiy)
5165 Implemented support within the resource conversion code for the Type-
5166 Specific byte within the various ACPI 3.0 *WordSpace macros.
5168 Fixed some issues within the resource conversion code for the type-specific
5169 flags for both Memory and I/O address resource descriptors. For Memory,
5170 implemented support for the MTP and TTP flags. For I/O, split the TRS and
5171 TTP flags into two separate fields.
5173 Code and Data Size: The current and previous library sizes for the core
5174 subsystem are shown below. These are the code and data sizes for the
5175 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
5176 values do not include any ACPI driver or OSPM code. The debug version of the
5177 code includes the debug output trace mechanism and has a much larger code
5178 and data size. Note that these values will vary depending on the efficiency
5179 of the compiler and the compiler options used during generation.
5182 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
5183 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
5185 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
5186 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
5190 2) iASL Compiler/Disassembler:
5192 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
5193 corresponding ResourceSource string was not also present in a resource
5194 descriptor declaration. This restriction caused problems with existing
5195 AML/ASL code that includes the Index byte without the string. When such AML
5196 was disassembled, it could not be compiled without modification. Further,
5197 the modified code created a resource template with a different size than the
5198 original, breaking code that used fixed offsets into the resource template
5201 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
5202 byte. This byte is now emitted if present so that the exact AML can be
5203 reproduced when the disassembled code is recompiled.
5205 Improved comments and text alignment for the resource descriptor code
5206 emitted by the disassembler.
5208 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
5209 Register() resource descriptor.
5211 ----------------------------------------
5212 30 September 2005. Summary of changes for version 20050930:
5214 1) ACPI CA Core Subsystem:
5216 Completed a major overhaul of the Resource Manager code - specifically,
5217 optimizations in the area of the AML/internal resource conversion code. The
5218 code has been optimized to simplify and eliminate duplicated code, CPU stack
5219 use has been decreased by optimizing function parameters and local
5220 variables, and naming conventions across the manager have been standardized
5221 for clarity and ease of maintenance (this includes function, parameter,
5222 variable, and struct/typedef names.) The update may force changes in some
5223 driver code, depending on how resources are handled by the host OS.
5225 All Resource Manager dispatch and information tables have been moved to a
5226 single location for clarity and ease of maintenance. One new file was
5227 created, named "rsinfo.c".
5229 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
5230 guarantee that the argument is not evaluated twice, making them less prone
5231 to macro side-effects. However, since there exists the possibility of
5232 additional stack use if a particular compiler cannot optimize them (such as
5233 in the debug generation case), the original macros are optionally available.
5234 Note that some invocations of the return_VALUE macro may now cause size
5235 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
5236 eliminate these. (From Randy Dunlap)
5238 Implemented a new mechanism to enable debug tracing for individual control
5239 methods. A new external interface, AcpiDebugTrace, is provided to enable
5240 this mechanism. The intent is to allow the host OS to easily enable and
5241 disable tracing for problematic control methods. This interface can be
5242 easily exposed to a user or debugger interface if desired. See the file
5243 psxface.c for details.
5245 AcpiUtCallocate will now return a valid pointer if a length of zero is
5246 specified - a length of one is used and a warning is issued. This matches
5247 the behavior of AcpiUtAllocate.
5249 Code and Data Size: The current and previous library sizes for the core
5250 subsystem are shown below. These are the code and data sizes for the
5251 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
5252 values do not include any ACPI driver or OSPM code. The debug version of the
5253 code includes the debug output trace mechanism and has a much larger code
5254 and data size. Note that these values will vary depending on the efficiency
5255 of the compiler and the compiler options used during generation.
5258 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
5259 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
5261 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
5262 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
5265 2) iASL Compiler/Disassembler:
5267 A remark is issued if the effective compile-time length of a package or
5268 buffer is zero. Previously, this was a warning.
5270 ----------------------------------------
5271 16 September 2005. Summary of changes for version 20050916:
5273 1) ACPI CA Core Subsystem:
5275 Fixed a problem within the Resource Manager where support for the Generic
5276 Register descriptor was not fully implemented. This descriptor is now fully
5277 recognized, parsed, disassembled, and displayed.
5279 Completely restructured the Resource Manager code to utilize table-driven
5280 dispatch and lookup, eliminating many of the large switch() statements. This
5281 reduces overall subsystem code size and code complexity. Affects the
5282 resource parsing and construction, disassembly, and debug dump output.
5284 Cleaned up and restructured the debug dump output for all resource
5285 descriptors. Improved readability of the output and reduced code size.
5287 Fixed a problem where changes to internal data structures caused the
5288 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
5290 Code and Data Size: The current and previous library sizes for the core
5291 subsystem are shown below. These are the code and data sizes for the
5292 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
5293 values do not include any ACPI driver or OSPM code. The debug version of the
5294 code includes the debug output trace mechanism and has a much larger code
5295 and data size. Note that these values will vary depending on the efficiency
5296 of the compiler and the compiler options used during generation.
5299 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
5300 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
5302 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
5303 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
5306 2) iASL Compiler/Disassembler:
5308 Updated the disassembler to automatically insert an EndDependentFn() macro
5309 into the ASL stream if this macro is missing in the original AML code,
5310 simplifying compilation of the resulting ASL module.
5312 Fixed a problem in the disassembler where a disassembled ResourceSource
5313 string (within a large resource descriptor) was not surrounded by quotes and
5314 not followed by a comma, causing errors when the resulting ASL module was
5315 compiled. Also, escape sequences within a ResourceSource string are now
5316 handled correctly (especially "\\")
5318 ----------------------------------------
5319 02 September 2005. Summary of changes for version 20050902:
5321 1) ACPI CA Core Subsystem:
5323 Fixed a problem with the internal Owner ID allocation and deallocation
5324 mechanisms for control method execution and recursive method invocation.
5325 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
5326 messages seen on some systems. Recursive method invocation depth is
5327 currently limited to 255. (Alexey Starikovskiy)
5329 Completely eliminated all vestiges of support for the "module-level
5330 executable code" until this support is fully implemented and debugged. This
5331 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
5332 some systems that invoke this support.
5334 Fixed a problem within the resource manager code where the transaction flags
5335 for a 64-bit address descriptor were handled incorrectly in the type-
5338 Consolidated duplicate code within the address descriptor resource manager
5339 code, reducing overall subsystem code size.
5341 Fixed a fault when using the AML debugger "disassemble" command to
5342 disassemble individual control methods.
5344 Removed references to the "release_current" directory within the Unix
5347 Code and Data Size: The current and previous core subsystem library sizes
5348 are shown below. These are the code and data sizes for the acpica.lib
5349 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
5350 include any ACPI driver or OSPM code. The debug version of the code includes
5351 the debug output trace mechanism and has a much larger code and data size.
5352 Note that these values will vary depending on the efficiency of the compiler
5353 and the compiler options used during generation.
5356 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
5357 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
5359 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
5360 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
5363 2) iASL Compiler/Disassembler:
5365 Implemented an error check for illegal duplicate values in the interrupt and
5366 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
5369 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
5370 too many values in the interrupt list (16 max) and invalid values in the
5373 The maximum length string literal within an ASL file is now restricted to
5374 200 characters as per the ACPI specification.
5376 Fixed a fault when using the -ln option (generate namespace listing).
5378 Implemented an error check to determine if a DescriptorName within a
5379 resource descriptor has already been used within the current scope.
5381 ----------------------------------------
5382 15 August 2005. Summary of changes for version 20050815:
5384 1) ACPI CA Core Subsystem:
5386 Implemented a full bytewise compare to determine if a table load request is
5387 attempting to load a duplicate table. The compare is performed if the table
5388 signatures and table lengths match. This will allow different tables with
5389 the same OEM Table ID and revision to be loaded - probably against the ACPI
5390 specification, but discovered in the field nonetheless.
5392 Added the changes.txt logfile to each of the zipped release packages.
5394 Code and Data Size: Current and previous core subsystem library sizes are
5395 shown below. These are the code and data sizes for the acpica.lib produced
5396 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5397 any ACPI driver or OSPM code. The debug version of the code includes the
5398 debug output trace mechanism and has a much larger code and data size. Note
5399 that these values will vary depending on the efficiency of the compiler and
5400 the compiler options used during generation.
5403 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
5404 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
5406 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
5407 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
5410 2) iASL Compiler/Disassembler:
5412 Fixed a problem where incorrect AML code could be generated for Package
5413 objects if optimization is disabled (via the -oa switch).
5415 Fixed a problem with where incorrect AML code is generated for variable-
5416 length packages when the package length is not specified and the number of
5417 initializer values is greater than 255.
5420 ----------------------------------------
5421 29 July 2005. Summary of changes for version 20050729:
5423 1) ACPI CA Core Subsystem:
5425 Implemented support to ignore an attempt to install/load a particular ACPI
5426 table more than once. Apparently there exists BIOS code that repeatedly
5427 attempts to load the same SSDT upon certain events. With assistance from
5428 Venkatesh Pallipadi.
5430 Restructured the main interface to the AML parser in order to correctly
5431 handle all exceptional conditions. This will prevent leakage of the OwnerId
5432 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
5433 machines. With assistance from Alexey Starikovskiy.
5435 Support for "module level code" has been disabled in this version due to a
5436 number of issues that have appeared on various machines. The support can be
5437 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
5438 compilation. When the issues are fully resolved, the code will be enabled by
5441 Modified the internal functions for debug print support to define the
5442 FunctionName parameter as a (const char *) for compatibility with compiler
5443 built-in macros such as __FUNCTION__, etc.
5445 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
5447 Implemented support to display an object count summary for the AML Debugger
5448 commands Object and Methods.
5450 Code and Data Size: Current and previous core subsystem library sizes are
5451 shown below. These are the code and data sizes for the acpica.lib produced
5452 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5453 any ACPI driver or OSPM code. The debug version of the code includes the
5454 debug output trace mechanism and has a much larger code and data size. Note
5455 that these values will vary depending on the efficiency of the compiler and
5456 the compiler options used during generation.
5459 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
5460 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
5462 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
5463 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
5466 2) iASL Compiler/Disassembler:
5468 Fixed a regression that appeared in the 20050708 version of the compiler
5469 where an error message was inadvertently emitted for invocations of the _OSI
5470 reserved control method.
5472 ----------------------------------------
5473 08 July 2005. Summary of changes for version 20050708:
5475 1) ACPI CA Core Subsystem:
5477 The use of the CPU stack in the debug version of the subsystem has been
5478 considerably reduced. Previously, a debug structure was declared in every
5479 function that used the debug macros. This structure has been removed in
5480 favor of declaring the individual elements as parameters to the debug
5481 functions. This reduces the cumulative stack use during nested execution of
5482 ACPI function calls at the cost of a small increase in the code size of the
5483 debug version of the subsystem. With assistance from Alexey Starikovskiy and
5486 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
5487 headers to define a macro that will return the current function name at
5488 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
5489 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
5490 compiler-dependent header, the function name is saved on the CPU stack (one
5491 pointer per function.) This mechanism is used because apparently there
5492 exists no standard ANSI-C defined macro that that returns the function name.
5494 Redesigned and reimplemented the "Owner ID" mechanism used to track
5495 namespace objects created/deleted by ACPI tables and control method
5496 execution. A bitmap is now used to allocate and free the IDs, thus solving
5497 the wraparound problem present in the previous implementation. The size of
5498 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
5501 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
5502 flag definitions within the headers for the predefined ACPI tables. These
5503 have been replaced by UINT8_BIT in order to increase the code portability of
5504 the subsystem. If the use of UINT8 remains a problem, we may be forced to
5505 eliminate bitfields entirely because of a lack of portability.
5507 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
5508 is a frequently used function and this improvement increases the performance
5509 of the entire subsystem (Alexey Starikovskiy).
5511 Fixed several possible memory leaks and the inverse - premature object
5512 deletion (Alexey Starikovskiy).
5514 Code and Data Size: Current and previous core subsystem library sizes are
5515 shown below. These are the code and data sizes for the acpica.lib produced
5516 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5517 any ACPI driver or OSPM code. The debug version of the code includes the
5518 debug output trace mechanism and has a much larger code and data size. Note
5519 that these values will vary depending on the efficiency of the compiler and
5520 the compiler options used during generation.
5523 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
5524 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
5526 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
5527 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
5529 ----------------------------------------
5530 24 June 2005. Summary of changes for version 20050624:
5532 1) ACPI CA Core Subsystem:
5534 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
5535 the host-defined cache object. This allows the OSL implementation to define
5536 and type this object in any manner desired, simplifying the OSL
5537 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
5538 Linux, and should be defined in the OS-specific header file for other
5539 operating systems as required.
5541 Changed the interface to AcpiOsAcquireObject to directly return the
5542 requested object as the function return (instead of ACPI_STATUS.) This
5543 change was made for performance reasons, since this is the purpose of the
5544 interface in the first place. AcpiOsAcquireObject is now similar to the
5545 AcpiOsAllocate interface.
5547 Implemented a new AML debugger command named Businfo. This command displays
5548 information about all devices that have an associate _PRT object. The _ADR,
5549 _HID, _UID, and _CID are displayed for these devices.
5551 Modified the initialization sequence in AcpiInitializeSubsystem to call the
5552 OSL interface AcpiOslInitialize first, before any local initialization. This
5553 change was required because the global initialization now calls OSL
5556 Enhanced the Dump command to display the entire contents of Package objects
5557 (including all sub-objects and their values.)
5559 Restructured the code base to split some files because of size and/or
5560 because the code logically belonged in a separate file. New files are listed
5561 below. All makefiles and project files included in the ACPI CA release have
5563 utilities/utcache.c /* Local cache interfaces */
5564 utilities/utmutex.c /* Local mutex support */
5565 utilities/utstate.c /* State object support */
5566 interpreter/parser/psloop.c /* Main AML parse loop */
5568 Code and Data Size: Current and previous core subsystem library sizes are
5569 shown below. These are the code and data sizes for the acpica.lib produced
5570 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5571 any ACPI driver or OSPM code. The debug version of the code includes the
5572 debug output trace mechanism and has a much larger code and data size. Note
5573 that these values will vary depending on the efficiency of the compiler and
5574 the compiler options used during generation.
5577 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
5578 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
5580 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
5581 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
5584 2) iASL Compiler/Disassembler:
5586 Fixed a regression introduced in version 20050513 where the use of a Package
5587 object within a Case() statement caused a compile time exception. The
5588 original behavior has been restored (a Match() operator is emitted.)
5590 ----------------------------------------
5591 17 June 2005. Summary of changes for version 20050617:
5593 1) ACPI CA Core Subsystem:
5595 Moved the object cache operations into the OS interface layer (OSL) to allow
5596 the host OS to handle these operations if desired (for example, the Linux
5597 OSL will invoke the slab allocator). This support is optional; the compile
5598 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
5599 code in the ACPI CA core. The new OSL interfaces are shown below. See
5600 utalloc.c for an example implementation, and acpiosxf.h for the exact
5601 interface definitions. With assistance from Alexey Starikovskiy.
5608 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
5609 and restore a flags parameter. This fits better with many OS lock models.
5610 Note: the current execution state (interrupt handler or not) is no longer
5611 passed to these interfaces. If necessary, the OSL must determine this state
5612 by itself, a simple and fast operation. With assistance from Alexey
5615 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
5616 present if the revision of the RSDP was 2 or greater. According to the ACPI
5617 specification, the XSDT is optional in all cases, and the table manager
5618 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
5619 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
5622 Fixed an interpreter problem with the Mid() operator in the case of an input
5623 string where the resulting output string is of zero length. It now correctly
5624 returns a valid, null terminated string object instead of a string object
5625 with a null pointer.
5627 Fixed a problem with the control method argument handling to allow a store
5628 to an Arg object that already contains an object of type Device. The Device
5629 object is now correctly overwritten. Previously, an error was returned.
5632 Enhanced the debugger Find command to emit object values in addition to the
5633 found object pathnames. The output format is the same as the dump namespace
5636 Enhanced the debugger Set command. It now has the ability to set the value
5637 of any Named integer object in the namespace (Previously, only method locals
5638 and args could be set.)
5640 Code and Data Size: Current and previous core subsystem library sizes are
5641 shown below. These are the code and data sizes for the acpica.lib produced
5642 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5643 any ACPI driver or OSPM code. The debug version of the code includes the
5644 debug output trace mechanism and has a much larger code and data size. Note
5645 that these values will vary depending on the efficiency of the compiler and
5646 the compiler options used during generation.
5649 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
5650 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
5652 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
5653 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
5656 2) iASL Compiler/Disassembler:
5658 Fixed a regression in the disassembler where if/else/while constructs were
5659 output incorrectly. This problem was introduced in the previous release
5660 (20050526). This problem also affected the single-step disassembly in the
5663 Fixed a problem where compiling the reserved _OSI method would randomly (but
5664 rarely) produce compile errors.
5666 Enhanced the disassembler to emit compilable code in the face of incorrect
5667 AML resource descriptors. If the optional ResourceSourceIndex is present,
5668 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
5669 disassembly. Otherwise, the resulting code cannot be compiled without
5672 ----------------------------------------
5673 26 May 2005. Summary of changes for version 20050526:
5675 1) ACPI CA Core Subsystem:
5677 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
5678 the module level (not within a control method.) These opcodes are executed
5679 exactly once at the time the table is loaded. This type of code was legal up
5680 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
5681 order to provide backwards compatibility with earlier BIOS implementations.
5682 This eliminates the "Encountered executable code at module level" warning
5683 that was previously generated upon detection of such code.
5685 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
5686 inadvertently be generated during the lookup of namespace objects in the
5687 second pass parse of ACPI tables and control methods. It appears that this
5688 problem could occur during the resolution of forward references to namespace
5691 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
5692 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
5693 allows the deadlock detection debug code to be compiled out in the normal
5694 case, improving mutex performance (and overall subsystem performance)
5697 Implemented a handful of miscellaneous fixes for possible memory leaks on
5698 error conditions and error handling control paths. These fixes were
5699 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
5701 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
5702 to prevent a fault in this error case.
5704 Code and Data Size: Current and previous core subsystem library sizes are
5705 shown below. These are the code and data sizes for the acpica.lib produced
5706 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5707 any ACPI driver or OSPM code. The debug version of the code includes the
5708 debug output trace mechanism and has a much larger code and data size. Note
5709 that these values will vary depending on the efficiency of the compiler and
5710 the compiler options used during generation.
5713 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5714 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5716 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
5717 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
5720 2) iASL Compiler/Disassembler:
5722 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
5723 the module level (not within a control method.) These operators will be
5724 executed once at the time the table is loaded. This type of code was legal
5725 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
5726 compiler in order to provide backwards compatibility with earlier BIOS ASL
5729 The ACPI integer width (specified via the table revision ID or the -r
5730 override, 32 or 64 bits) is now used internally during compile-time constant
5731 folding to ensure that constants are truncated to 32 bits if necessary.
5732 Previously, the revision ID value was only emitted in the AML table header.
5734 An error message is now generated for the Mutex and Method operators if the
5735 SyncLevel parameter is outside the legal range of 0 through 15.
5737 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
5738 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
5739 The actual underlying implementation of method argument typechecking is
5740 still under development, however.
5742 ----------------------------------------
5743 13 May 2005. Summary of changes for version 20050513:
5745 1) ACPI CA Core Subsystem:
5747 Implemented support for PCI Express root bridges -- added support for device
5748 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
5750 The interpreter now automatically truncates incoming 64-bit constants to 32
5751 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
5752 also affects the iASL compiler constant folding. (Note: as per below, the
5753 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
5755 Fixed a problem where string and buffer objects with "static" pointers
5756 (pointers to initialization data within an ACPI table) were not handled
5757 consistently. The internal object copy operation now always copies the data
5758 to a newly allocated buffer, regardless of whether the source object is
5761 Fixed a problem with the FromBCD operator where an implicit result
5762 conversion was improperly performed while storing the result to the target
5763 operand. Since this is an "explicit conversion" operator, the implicit
5764 conversion should never be performed on the output.
5766 Fixed a problem with the CopyObject operator where a copy to an existing
5767 named object did not always completely overwrite the existing object stored
5768 at name. Specifically, a buffer-to-buffer copy did not delete the existing
5771 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
5772 structs for consistency.
5774 Code and Data Size: Current and previous core subsystem library sizes are
5775 shown below. These are the code and data sizes for the acpica.lib produced
5776 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5777 any ACPI driver or OSPM code. The debug version of the code includes the
5778 debug output trace mechanism and has a much larger code and data size. Note
5779 that these values will vary depending on the efficiency of the compiler and
5780 the compiler options used during generation.
5783 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5784 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5785 Current Release: (Same sizes)
5786 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5787 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5790 2) iASL Compiler/Disassembler:
5792 The compiler now emits a warning if an attempt is made to generate a 64-bit
5793 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
5794 is truncated to 32 bits.
5796 Fixed a problem with large package objects: if the static length of the
5797 package is greater than 255, the "variable length package" opcode is
5798 emitted. Previously, this caused an error. This requires an update to the
5799 ACPI spec, since it currently (incorrectly) states that packages larger than
5800 255 elements are not allowed.
5802 The disassembler now correctly handles variable length packages and packages
5803 larger than 255 elements.
5805 ----------------------------------------
5806 08 April 2005. Summary of changes for version 20050408:
5808 1) ACPI CA Core Subsystem:
5810 Fixed three cases in the interpreter where an "index" argument to an ASL
5811 function was still (internally) 32 bits instead of the required 64 bits.
5812 This was the Index argument to the Index, Mid, and Match operators.
5814 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
5815 not a POSIX-defined function and not present in most kernel-level C
5816 libraries. All references to the C library strupr function have been removed
5819 Completed the deployment of static functions/prototypes. All prototypes with
5820 the static attribute have been moved from the headers to the owning C file.
5822 Implemented an extract option (-e) for the AcpiBin utility (AML binary
5823 utility). This option allows the utility to extract individual ACPI tables
5824 from the output of AcpiDmp. It provides the same functionality of the
5825 acpixtract.pl perl script without the worry of setting the correct perl
5826 options. AcpiBin runs on Windows and has not yet been generated/validated in
5827 the Linux/Unix environment (but should be soon).
5829 Updated and fixed the table dump option for AcpiBin (-d). This option
5830 converts a single ACPI table to a hex/ascii file, similar to the output of
5833 Code and Data Size: Current and previous core subsystem library sizes are
5834 shown below. These are the code and data sizes for the acpica.lib produced
5835 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5836 any ACPI driver or OSPM code. The debug version of the code includes the
5837 debug output trace mechanism and has a much larger code and data size. Note
5838 that these values will vary depending on the efficiency of the compiler and
5839 the compiler options used during generation.
5842 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
5843 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
5845 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5846 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5849 2) iASL Compiler/Disassembler:
5851 Disassembler fix: Added a check to ensure that the table length found in the
5852 ACPI table header within the input file is not longer than the actual input
5853 file size. This indicates some kind of file or table corruption.
5855 ----------------------------------------
5856 29 March 2005. Summary of changes for version 20050329:
5858 1) ACPI CA Core Subsystem:
5860 An error is now generated if an attempt is made to create a Buffer Field of
5861 length zero (A CreateField with a length operand of zero.)
5863 The interpreter now issues a warning whenever executable code at the module
5864 level is detected during ACPI table load. This will give some idea of the
5865 prevalence of this type of code.
5867 Implemented support for references to named objects (other than control
5868 methods) within package objects.
5870 Enhanced package object output for the debug object. Package objects are now
5871 completely dumped, showing all elements.
5873 Enhanced miscellaneous object output for the debug object. Any object can
5874 now be written to the debug object (for example, a device object can be
5875 written, and the type of the object will be displayed.)
5877 The "static" qualifier has been added to all local functions across both the
5878 core subsystem and the iASL compiler.
5880 The number of "long" lines (> 80 chars) within the source has been
5881 significantly reduced, by about 1/3.
5883 Cleaned up all header files to ensure that all CA/iASL functions are
5884 prototyped (even static functions) and the formatting is consistent.
5886 Two new header files have been added, acopcode.h and acnames.h.
5888 Removed several obsolete functions that were no longer used.
5890 Code and Data Size: Current and previous core subsystem library sizes are
5891 shown below. These are the code and data sizes for the acpica.lib produced
5892 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5893 any ACPI driver or OSPM code. The debug version of the code includes the
5894 debug output trace mechanism and has a much larger code and data size. Note
5895 that these values will vary depending on the efficiency of the compiler and
5896 the compiler options used during generation.
5899 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5900 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
5902 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
5903 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
5907 2) iASL Compiler/Disassembler:
5909 Fixed a problem with the resource descriptor generation/support. For the
5910 ResourceSourceIndex and the ResourceSource fields, both must be present, or
5911 both must be not present - can't have one without the other.
5913 The compiler now returns non-zero from the main procedure if any errors have
5914 occurred during the compilation.
5917 ----------------------------------------
5918 09 March 2005. Summary of changes for version 20050309:
5920 1) ACPI CA Core Subsystem:
5922 The string-to-buffer implicit conversion code has been modified again after
5923 a change to the ACPI specification. In order to match the behavior of the
5924 other major ACPI implementation, the target buffer is no longer truncated if
5925 the source string is smaller than an existing target buffer. This change
5926 requires an update to the ACPI spec, and should eliminate the recent
5927 AE_AML_BUFFER_LIMIT issues.
5929 The "implicit return" support was rewritten to a new algorithm that solves
5930 the general case. Rather than attempt to determine when a method is about to
5931 exit, the result of every ASL operator is saved momentarily until the very
5932 next ASL operator is executed. Therefore, no matter how the method exits,
5933 there will always be a saved implicit return value. This feature is only
5934 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
5935 AE_AML_NO_RETURN_VALUE errors when enabled.
5937 Implemented implicit conversion support for the predicate (operand) of the
5938 If, Else, and While operators. String and Buffer arguments are automatically
5939 converted to Integers.
5941 Changed the string-to-integer conversion behavior to match the new ACPI
5942 errata: "If no integer object exists, a new integer is created. The ASCII
5943 string is interpreted as a hexadecimal constant. Each string character is
5944 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
5945 with the first character as the most significant digit, and ending with the
5946 first non-hexadecimal character or end-of-string." This means that the first
5947 non-hex character terminates the conversion and this is the code that was
5950 Fixed a problem where the ObjectType operator would fail (fault) when used
5951 on an Index of a Package which pointed to a null package element. The
5952 operator now properly returns zero (Uninitialized) in this case.
5954 Fixed a problem where the While operator used excessive memory by not
5955 properly popping the result stack during execution. There was no memory leak
5956 after execution, however. (Code provided by Valery Podrezov.)
5958 Fixed a problem where references to control methods within Package objects
5959 caused the method to be invoked, instead of producing a reference object
5960 pointing to the method.
5962 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
5963 improve performance and reduce code size. (Code provided by Alexey
5966 Code and Data Size: Current and previous core subsystem library sizes are
5967 shown below. These are the code and data sizes for the acpica.lib produced
5968 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5969 any ACPI driver or OSPM code. The debug version of the code includes the
5970 debug output trace mechanism and has a much larger code and data size. Note
5971 that these values will vary depending on the efficiency of the compiler and
5972 the compiler options used during generation.
5975 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5976 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
5978 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5979 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
5982 2) iASL Compiler/Disassembler:
5984 Fixed a problem with the Return operator with no arguments. Since the AML
5985 grammar for the byte encoding requires an operand for the Return opcode, the
5986 compiler now emits a Return(Zero) for this case. An ACPI specification
5987 update has been written for this case.
5989 For tables other than the DSDT, namepath optimization is automatically
5990 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
5991 compiler has no knowledge of where, and thus cannot optimize namepaths.
5993 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
5994 inadvertently omitted from the ACPI specification, and will require an
5997 The source file scan for ASCII characters is now optional (-a). This change
5998 was made because some vendors place non-ascii characters within comments.
5999 However, the scan is simply a brute-force byte compare to ensure all
6000 characters in the file are in the range 0x00 to 0x7F.
6002 Fixed a problem with the CondRefOf operator where the compiler was
6003 inappropriately checking for the existence of the target. Since the point of
6004 the operator is to check for the existence of the target at run-time, the
6005 compiler no longer checks for the target existence.
6007 Fixed a problem where errors generated from the internal AML interpreter
6008 during constant folding were not handled properly, causing a fault.
6010 Fixed a problem with overly aggressive range checking for the Stall
6011 operator. The valid range (max 255) is now only checked if the operand is of
6012 type Integer. All other operand types cannot be statically checked.
6014 Fixed a problem where control method references within the RefOf, DeRefOf,
6015 and ObjectType operators were not treated properly. They are now treated as
6016 actual references, not method invocations.
6018 Fixed and enhanced the "list namespace" option (-ln). This option was broken
6019 a number of releases ago.
6021 Improved error handling for the Field, IndexField, and BankField operators.
6022 The compiler now cleanly reports and recovers from errors in the field
6023 component (FieldUnit) list.
6025 Fixed a disassembler problem where the optional ResourceDescriptor fields
6026 TRS and TTP were not always handled correctly.
6028 Disassembler - Comments in output now use "//" instead of "/*"
6030 ----------------------------------------
6031 28 February 2005. Summary of changes for version 20050228:
6033 1) ACPI CA Core Subsystem:
6035 Fixed a problem where the result of an Index() operator (an object
6036 reference) must increment the reference count on the target object for the
6037 life of the object reference.
6039 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
6040 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
6041 resource descriptors.
6043 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
6044 Space Descriptor" string, indicating interpreter support for the descriptors
6047 Implemented header support for the new ACPI 3.0 FADT flag bits.
6049 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
6050 status/enable registers.
6052 Updated header support for the MADT processor local Apic struct and MADT
6053 platform interrupt source struct for new ACPI 3.0 fields.
6055 Implemented header support for the SRAT and SLIT ACPI tables.
6057 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
6060 Code and Data Size: Current and previous core subsystem library sizes are
6061 shown below. These are the code and data sizes for the acpica.lib produced
6062 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6063 any ACPI driver or OSPM code. The debug version of the code includes the
6064 debug output trace mechanism and has a much larger code and data size. Note
6065 that these values will vary depending on the efficiency of the compiler and
6066 the compiler options used during generation.
6069 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
6070 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
6072 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
6073 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
6076 2) iASL Compiler/Disassembler:
6078 Fixed a problem with the internal 64-bit String-to-integer conversion with
6079 strings less than two characters long.
6081 Fixed a problem with constant folding where the result of the Index()
6082 operator can not be considered a constant. This means that Index() cannot be
6083 a type3 opcode and this will require an update to the ACPI specification.
6085 Disassembler: Implemented support for the TTP, MTP, and TRS resource
6086 descriptor fields. These fields were inadvertently ignored and not output in
6087 the disassembly of the resource descriptor.
6090 ----------------------------------------
6091 11 February 2005. Summary of changes for version 20050211:
6093 1) ACPI CA Core Subsystem:
6095 Implemented ACPI 3.0 support for implicit conversion within the Match()
6096 operator. MatchObjects can now be of type integer, buffer, or string instead
6097 of just type integer. Package elements are implicitly converted to the type
6098 of the MatchObject. This change aligns the behavior of Match() with the
6099 behavior of the other logical operators (LLess(), etc.) It also requires an
6100 errata change to the ACPI specification as this support was intended for
6101 ACPI 3.0, but was inadvertently omitted.
6103 Fixed a problem with the internal implicit "to buffer" conversion. Strings
6104 that are converted to buffers will cause buffer truncation if the string is
6105 smaller than the target buffer. Integers that are converted to buffers will
6106 not cause buffer truncation, only zero extension (both as per the ACPI
6107 spec.) The problem was introduced when code was added to truncate the
6108 buffer, but this should not be performed in all cases, only the string case.
6110 Fixed a problem with the Buffer and Package operators where the interpreter
6111 would get confused if two such operators were used as operands to an ASL
6112 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
6113 stack was not being popped after the execution of these operators, resulting
6114 in an AE_NO_RETURN_VALUE exception.
6116 Fixed a problem with constructs of the form Store(Index(...),...). The
6117 reference object returned from Index was inadvertently resolved to an actual
6118 value. This problem was introduced in version 20050114 when the behavior of
6119 Store() was modified to restrict the object types that can be used as the
6120 source operand (to match the ACPI specification.)
6122 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
6124 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
6126 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
6128 Code and Data Size: Current and previous core subsystem library sizes are
6129 shown below. These are the code and data sizes for the acpica.lib produced
6130 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6131 any ACPI driver or OSPM code. The debug version of the code includes the
6132 debug output trace mechanism and has a much larger code and data size. Note
6133 that these values will vary depending on the efficiency of the compiler and
6134 the compiler options used during generation.
6137 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
6138 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
6140 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
6141 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
6144 2) iASL Compiler/Disassembler:
6146 Fixed a code generation problem in the constant folding optimization code
6147 where incorrect code was generated if a constant was reduced to a buffer
6148 object (i.e., a reduced type 5 opcode.)
6150 Fixed a typechecking problem for the ToBuffer operator. Caused by an
6151 incorrect return type in the internal opcode information table.
6153 ----------------------------------------
6154 25 January 2005. Summary of changes for version 20050125:
6156 1) ACPI CA Core Subsystem:
6158 Fixed a recently introduced problem with the Global Lock where the
6159 underlying semaphore was not created. This problem was introduced in
6160 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
6161 Acquire() operation on _GL.
6163 The local object cache is now optional, and is disabled by default. Both
6164 AcpiExec and the iASL compiler enable the cache because they run in user
6165 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
6166 to enable the local cache.
6168 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
6169 optional "implicit return" support where an error was returned if no return
6170 object was expected, but one was implicitly returned. AE_OK is now returned
6171 in this case and the implicitly returned object is deleted.
6172 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
6173 methods such as _STA and _INI where the return type is known up front.
6175 Fixed a few issues with the internal convert-to-integer code. It now returns
6176 an error if an attempt is made to convert a null string, a string of only
6177 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
6178 and explicit conversion via the ToInteger() operator.
6180 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
6181 not needed for normal operation and should increase the performance of the
6182 entire subsystem. The code remains in case it is needed for debug purposes
6185 The AcpiExec source and makefile are included in the Unix/Linux package for
6188 Code and Data Size: Current and previous core subsystem library sizes are
6189 shown below. These are the code and data sizes for the acpica.lib produced
6190 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6191 any ACPI driver or OSPM code. The debug version of the code includes the
6192 debug output trace mechanism and has a much larger code and data size. Note
6193 that these values will vary depending on the efficiency of the compiler and
6194 the compiler options used during generation.
6197 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
6198 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
6200 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
6201 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
6203 2) iASL Compiler/Disassembler:
6205 Switch/Case support: A warning is now issued if the type of the Switch value
6206 cannot be determined at compile time. For example, Switch(Arg0) will
6207 generate the warning, and the type is assumed to be an integer. As per the
6208 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
6211 Switch/Case support: Implemented support for buffer and string objects as
6212 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
6213 buffers and strings.
6215 Switch/Case support: The emitted code for the LEqual() comparisons now uses
6216 the switch value as the first operand, not the second. The case value is now
6217 the second operand, and this allows the case value to be implicitly
6218 converted to the type of the switch value, not the other way around.
6220 Switch/Case support: Temporary variables are now emitted immediately within
6221 the control method, not at the global level. This means that there are now
6222 36 temps available per-method, not 36 temps per-module as was the case with
6223 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
6225 ----------------------------------------
6226 14 January 2005. Summary of changes for version 20050114:
6228 Added 2005 copyright to all module headers. This affects every module in
6229 the core subsystem, iASL compiler, and the utilities.
6231 1) ACPI CA Core Subsystem:
6233 Fixed an issue with the String-to-Buffer conversion code where the string
6234 null terminator was not included in the buffer after conversion, but there
6235 is existing ASL that assumes the string null terminator is included. This is
6236 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
6237 introduced in the previous version when the code was updated to correctly
6238 set the converted buffer size as per the ACPI specification. The ACPI spec
6239 is ambiguous and will be updated to specify that the null terminator must be
6240 included in the converted buffer. This also affects the ToBuffer() ASL
6243 Fixed a problem with the Mid() ASL/AML operator where it did not work
6244 correctly on Buffer objects. Newly created sub-buffers were not being marked
6248 Fixed a problem in AcpiTbFindTable where incorrect string compares were
6249 performed on the OemId and OemTableId table header fields. These fields are
6250 not null terminated, so strncmp is now used instead of strcmp.
6252 Implemented a restriction on the Store() ASL/AML operator to align the
6253 behavior with the ACPI specification. Previously, any object could be used
6254 as the source operand. Now, the only objects that may be used are Integers,
6255 Buffers, Strings, Packages, Object References, and DDB Handles. If
6256 necessary, the original behavior can be restored by enabling the
6257 EnableInterpreterSlack flag.
6259 Enhanced the optional "implicit return" support to allow an implicit return
6260 value from methods that are invoked externally via the AcpiEvaluateObject
6261 interface. This enables implicit returns from the _STA and _INI methods,
6264 Changed the Revision() ASL/AML operator to return the current version of the
6265 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
6266 the supported ACPI version (This is the function of the _REV method).
6268 Updated the _REV predefined method to return the currently supported version
6271 Implemented batch mode option for the AcpiExec utility (-b).
6273 Code and Data Size: Current and previous core subsystem library sizes are
6274 shown below. These are the code and data sizes for the acpica.lib produced
6275 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6276 any ACPI driver or OSPM code. The debug version of the code includes the
6277 debug output trace mechanism and has a much larger code and data size. Note
6278 that these values will vary depending on the efficiency of the compiler and
6279 the compiler options used during generation.
6282 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
6283 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
6285 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
6286 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
6288 ----------------------------------------
6289 10 December 2004. Summary of changes for version 20041210:
6291 ACPI 3.0 support is nearing completion in both the iASL compiler and the
6292 ACPI CA core subsystem.
6294 1) ACPI CA Core Subsystem:
6296 Fixed a problem in the ToDecimalString operator where the resulting string
6297 length was incorrectly calculated. The length is now calculated exactly,
6298 eliminating incorrect AE_STRING_LIMIT exceptions.
6300 Fixed a problem in the ToHexString operator to allow a maximum 200 character
6301 string to be produced.
6303 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
6304 routine where the length of the resulting buffer was not truncated to the
6305 new size (if the target buffer already existed).
6307 Code and Data Size: Current and previous core subsystem library sizes are
6308 shown below. These are the code and data sizes for the acpica.lib produced
6309 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6310 any ACPI driver or OSPM code. The debug version of the code includes the
6311 debug output trace mechanism and has a much larger code and data size. Note
6312 that these values will vary depending on the efficiency of the compiler and
6313 the compiler options used during generation.
6316 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
6317 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
6319 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
6320 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
6323 2) iASL Compiler/Disassembler:
6325 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
6326 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
6327 Includes support in the disassembler.
6329 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
6332 Fixed a problem where the _HE resource name for the Interrupt macro was
6333 referencing bit 0 instead of bit 1.
6335 Implemented check for maximum 255 interrupts in the Interrupt macro.
6337 Fixed a problem with the predefined resource descriptor names where
6338 incorrect AML code was generated if the offset within the resource buffer
6339 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
6340 but did not update the surrounding package lengths.
6342 Changes to the Dma macro: All channels within the channel list must be in
6343 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
6344 optional (default is BusMaster).
6346 Implemented check for maximum 7 data bytes for the VendorShort macro.
6348 The ReadWrite parameter is now optional for the Memory32 and similar macros.
6350 ----------------------------------------
6351 03 December 2004. Summary of changes for version 20041203:
6353 1) ACPI CA Core Subsystem:
6355 The low-level field insertion/extraction code (exfldio) has been completely
6356 rewritten to eliminate unnecessary complexity, bugs, and boundary
6359 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
6360 operators where the input operand could be inadvertently deleted if no
6361 conversion was necessary (e.g., if the input to ToInteger was an Integer
6364 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
6365 exception code was returned if the resulting string would be > 200 chars.
6366 AE_STRING_LIMIT is now returned.
6368 Fixed a problem with the Concatenate operator where AE_OK was always
6369 returned, even if the operation failed.
6371 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
6372 semaphores to be allocated.
6374 Code and Data Size: Current and previous core subsystem library sizes are
6375 shown below. These are the code and data sizes for the acpica.lib produced
6376 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6377 any ACPI driver or OSPM code. The debug version of the code includes the
6378 debug output trace mechanism and has a much larger code and data size. Note
6379 that these values will vary depending on the efficiency of the compiler and
6380 the compiler options used during generation.
6383 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
6384 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
6386 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
6387 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
6390 2) iASL Compiler/Disassembler:
6392 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
6393 recently introduced in 20041119.
6395 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
6396 byte was inadvertently set to zero.
6398 ----------------------------------------
6399 19 November 2004. Summary of changes for version 20041119:
6401 1) ACPI CA Core Subsystem:
6403 Fixed a problem in the internal ConvertToInteger routine where new integers
6404 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
6405 buffers and strings to integers.
6407 Implemented support to store a value to an Index() on a String object. This
6408 is an ACPI 2.0 feature that had not yet been implemented.
6410 Implemented new behavior for storing objects to individual package elements
6411 (via the Index() operator). The previous behavior was to invoke the implicit
6412 conversion rules if an object was already present at the index. The new
6413 behavior is to simply delete any existing object and directly store the new
6414 object. Although the ACPI specification seems unclear on this subject, other
6415 ACPI implementations behave in this manner. (This is the root of the
6416 AE_BAD_HEX_CONSTANT issue.)
6418 Modified the RSDP memory scan mechanism to support the extended checksum for
6419 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
6420 RSDP signature is found with a valid checksum.
6422 Code and Data Size: Current and previous core subsystem library sizes are
6423 shown below. These are the code and data sizes for the acpica.lib produced
6424 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6425 any ACPI driver or OSPM code. The debug version of the code includes the
6426 debug output trace mechanism and has a much larger code and data size. Note
6427 that these values will vary depending on the efficiency of the compiler and
6428 the compiler options used during generation.
6431 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
6432 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
6434 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
6435 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
6438 2) iASL Compiler/Disassembler:
6440 Fixed a missing semicolon in the aslcompiler.y file.
6442 ----------------------------------------
6443 05 November 2004. Summary of changes for version 20041105:
6445 1) ACPI CA Core Subsystem:
6447 Implemented support for FADT revision 2. This was an interim table (between
6448 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
6450 Implemented optional support to allow uninitialized LocalX and ArgX
6451 variables in a control method. The variables are initialized to an Integer
6452 object with a value of zero. This support is enabled by setting the
6453 AcpiGbl_EnableInterpreterSlack flag to TRUE.
6455 Implemented support for Integer objects for the SizeOf operator. Either 4
6456 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
6457 depending on the parent table revision).
6459 Fixed a problem in the implementation of the SizeOf and ObjectType operators
6460 where the operand was resolved to a value too early, causing incorrect
6461 return values for some objects.
6463 Fixed some possible memory leaks during exceptional conditions.
6465 Code and Data Size: Current and previous core subsystem library sizes are
6466 shown below. These are the code and data sizes for the acpica.lib produced
6467 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6468 any ACPI driver or OSPM code. The debug version of the code includes the
6469 debug output trace mechanism and has a much larger code and data size. Note
6470 that these values will vary depending on the efficiency of the compiler and
6471 the compiler options used during generation.
6474 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
6475 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
6477 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
6478 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
6481 2) iASL Compiler/Disassembler:
6483 Implemented support for all ACPI 3.0 reserved names and methods.
6485 Implemented all ACPI 3.0 grammar elements in the front-end, including
6486 support for semicolons.
6488 Implemented the ACPI 3.0 Function() and ToUUID() macros
6490 Fixed a problem in the disassembler where a Scope() operator would not be
6491 emitted properly if the target of the scope was in another table.
6493 ----------------------------------------
6494 15 October 2004. Summary of changes for version 20041015:
6496 Note: ACPI CA is currently undergoing an in-depth and complete formal
6497 evaluation to test/verify the following areas. Other suggestions are
6498 welcome. This will result in an increase in the frequency of releases and
6499 the number of bug fixes in the next few months.
6500 - Functional tests for all ASL/AML operators
6501 - All implicit/explicit type conversions
6502 - Bit fields and operation regions
6503 - 64-bit math support and 32-bit-only "truncated" math support
6504 - Exceptional conditions, both compiler and interpreter
6505 - Dynamic object deletion and memory leaks
6506 - ACPI 3.0 support when implemented
6507 - External interfaces to the ACPI subsystem
6510 1) ACPI CA Core Subsystem:
6512 Fixed two alignment issues on 64-bit platforms - within debug statements in
6513 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
6514 field within the non-aligned ACPI generic address structure.
6516 Fixed a problem in the Increment and Decrement operators where incorrect
6517 operand resolution could result in the inadvertent modification of the
6518 original integer when the integer is passed into another method as an
6519 argument and the arg is then incremented/decremented.
6521 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
6522 BCD number were truncated during conversion.
6524 Fixed a problem in the ToDecimal operator where the length of the resulting
6525 string could be set incorrectly too long if the input operand was a Buffer
6528 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
6529 within a buffer would prematurely terminate a compare between buffer
6532 Added a check for string overflow (>200 characters as per the ACPI
6533 specification) during the Concatenate operator with two string operands.
6535 Code and Data Size: Current and previous core subsystem library sizes are
6536 shown below. These are the code and data sizes for the acpica.lib produced
6537 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6538 any ACPI driver or OSPM code. The debug version of the code includes the
6539 debug output trace mechanism and has a much larger code and data size. Note
6540 that these values will vary depending on the efficiency of the compiler and
6541 the compiler options used during generation.
6544 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
6545 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
6547 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
6548 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
6552 2) iASL Compiler/Disassembler:
6554 Allow the use of the ObjectType operator on uninitialized Locals and Args
6555 (returns 0 as per the ACPI specification).
6557 Fixed a problem where the compiler would fault if there was a syntax error
6558 in the FieldName of all of the various CreateXXXField operators.
6560 Disallow the use of lower case letters within the EISAID macro, as per the
6561 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
6562 U is an uppercase letter and N is a hex digit.
6565 ----------------------------------------
6566 06 October 2004. Summary of changes for version 20041006:
6568 1) ACPI CA Core Subsystem:
6570 Implemented support for the ACPI 3.0 Timer operator. This ASL function
6571 implements a 64-bit timer with 100 nanosecond granularity.
6573 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
6574 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
6575 the timer with the best clock available. Also, it keeps the core subsystem
6576 out of the clock handling business, since the host OS (usually) performs
6579 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
6580 functions use a 64-bit address which is part of the packed ACPI Generic
6581 Address Structure. Since the structure is non-aligned, the alignment macros
6582 are now used to extract the address to a local variable before use.
6584 Fixed a problem where the ToInteger operator assumed all input strings were
6585 hexadecimal. The operator now handles both decimal strings and hex strings
6586 (prefixed with "0x").
6588 Fixed a problem where the string length in the string object created as a
6589 result of the internal ConvertToString procedure could be incorrect. This
6590 potentially affected all implicit conversions and also the ToDecimalString
6591 and ToHexString operators.
6593 Fixed two problems in the ToString operator. If the length parameter was
6594 zero, an incorrect string object was created and the value of the input
6595 length parameter was inadvertently changed from zero to Ones.
6597 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
6598 resource macro was ignored.
6600 Simplified the interfaces to the internal division functions, reducing code
6601 size and complexity.
6603 Code and Data Size: Current and previous core subsystem library sizes are
6604 shown below. These are the code and data sizes for the acpica.lib produced
6605 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6606 any ACPI driver or OSPM code. The debug version of the code includes the
6607 debug output trace mechanism and has a much larger code and data size. Note
6608 that these values will vary depending on the efficiency of the compiler and
6609 the compiler options used during generation.
6612 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
6613 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
6615 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
6616 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
6619 2) iASL Compiler/Disassembler:
6621 Implemented support for the ACPI 3.0 Timer operator.
6623 Fixed a problem where the Default() operator was inadvertently ignored in a
6624 Switch/Case block. This was a problem in the translation of the Switch
6625 statement to If...Else pairs.
6627 Added support to allow a standalone Return operator, with no parentheses (or
6630 Fixed a problem with code generation for the ElseIf operator where the
6631 translated Else...If parse tree was improperly constructed leading to the
6634 ----------------------------------------
6635 22 September 2004. Summary of changes for version 20040922:
6637 1) ACPI CA Core Subsystem:
6639 Fixed a problem with the implementation of the LNot() operator where "Ones"
6640 was not returned for the TRUE case. Changed the code to return Ones instead
6641 of (!Arg) which was usually 1. This change affects iASL constant folding for
6644 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
6645 initialized properly -- Now zero the entire buffer in this case where the
6646 buffer already exists.
6648 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
6649 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
6650 related code considerably. This will require changes/updates to all OS
6651 interface layers (OSLs.)
6653 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
6654 a system exception handler to be installed. This handler is invoked upon any
6655 run-time exception that occurs during control method execution.
6657 Added support for the DSDT in AcpiTbFindTable. This allows the
6658 DataTableRegion() operator to access the local copy of the DSDT.
6660 Code and Data Size: Current and previous core subsystem library sizes are
6661 shown below. These are the code and data sizes for the acpica.lib produced
6662 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6663 any ACPI driver or OSPM code. The debug version of the code includes the
6664 debug output trace mechanism and has a much larger code and data size. Note
6665 that these values will vary depending on the efficiency of the compiler and
6666 the compiler options used during generation.
6669 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
6670 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
6672 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
6673 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
6676 2) iASL Compiler/Disassembler:
6678 Fixed a problem with constant folding and the LNot operator. LNot was
6679 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
6680 could result in the generation of an incorrect folded/reduced constant.
6682 End-Of-File is now allowed within a "//"-style comment. A parse error no
6683 longer occurs if such a comment is at the very end of the input ASL source
6686 Implemented the "-r" option to override the Revision in the table header.
6687 The initial use of this option will be to simplify the evaluation of the AML
6688 interpreter by allowing a single ASL source module to be compiled for either
6689 32-bit or 64-bit integers.
6692 ----------------------------------------
6693 27 August 2004. Summary of changes for version 20040827:
6695 1) ACPI CA Core Subsystem:
6697 - Implemented support for implicit object conversion in the non-numeric
6698 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
6699 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
6700 the second operand is implicitly converted on the fly to match the type of
6701 the first operand. For example:
6703 LEqual (Source1, Source2)
6705 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
6706 The data type of Source1 dictates the required type of Source2. Source2 is
6707 implicitly converted if necessary to match the type of Source1.
6709 - Updated and corrected the behavior of the string conversion support. The
6710 rules concerning conversion of buffers to strings (according to the ACPI
6711 specification) are as follows:
6713 ToDecimalString - explicit byte-wise conversion of buffer to string of
6714 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
6715 conversion of buffer to string of hex values (0-FF) separated by commas.
6716 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
6717 copy with no transform except NULL terminated. Any other implicit buffer-to-
6718 string conversion - byte-wise conversion of buffer to string of hex values
6719 (0-FF) separated by spaces.
6721 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
6723 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
6724 one byte too short in the case of a node in the root scope. This could
6725 cause a fault during debug output.
6727 - Code and Data Size: Current and previous core subsystem library sizes are
6728 shown below. These are the code and data sizes for the acpica.lib produced
6729 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6730 any ACPI driver or OSPM code. The debug version of the code includes the
6731 debug output trace mechanism and has a much larger code and data size. Note
6732 that these values will vary depending on the efficiency of the compiler and
6733 the compiler options used during generation.
6736 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
6737 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
6739 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
6740 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
6743 2) iASL Compiler/Disassembler:
6745 - Fixed a Linux generation error.
6748 ----------------------------------------
6749 16 August 2004. Summary of changes for version 20040816:
6751 1) ACPI CA Core Subsystem:
6753 Designed and implemented support within the AML interpreter for the so-
6754 called "implicit return". This support returns the result of the last ASL
6755 operation within a control method, in the absence of an explicit Return()
6756 operator. A few machines depend on this behavior, even though it is not
6757 explicitly supported by the ASL language. It is optional support that can
6758 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
6760 Removed support for the PCI_Config address space from the internal low level
6761 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
6762 support was not used internally, and would not work correctly anyway because
6763 the PCI bus number and segment number were not supported. There are
6764 separate interfaces for PCI configuration space access because of the unique
6767 Code and Data Size: Current and previous core subsystem library sizes are
6768 shown below. These are the code and data sizes for the acpica.lib produced
6769 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6770 any ACPI driver or OSPM code. The debug version of the code includes the
6771 debug output trace mechanism and has a much larger code and data size. Note
6772 that these values will vary depending on the efficiency of the compiler and
6773 the compiler options used during generation.
6776 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
6777 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
6779 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
6780 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
6783 2) iASL Compiler/Disassembler:
6785 Fixed a problem where constants in ASL expressions at the root level (not
6786 within a control method) could be inadvertently truncated during code
6787 generation. This problem was introduced in the 20040715 release.
6790 ----------------------------------------
6791 15 July 2004. Summary of changes for version 20040715:
6793 1) ACPI CA Core Subsystem:
6795 Restructured the internal HW GPE interfaces to pass/track the current state
6796 of interrupts (enabled/disabled) in order to avoid possible deadlock and
6797 increase flexibility of the interfaces.
6799 Implemented a "lexicographical compare" for String and Buffer objects within
6800 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
6801 as per further clarification to the ACPI specification. Behavior is similar
6802 to C library "strcmp".
6804 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
6805 external function. In the 32-bit non-debug case, the stack use has been
6806 reduced from 168 bytes to 32 bytes.
6808 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
6809 whose purpose is to allow the AML interpreter to forgive certain bad AML
6810 constructs. Default setting is FALSE.
6812 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
6813 support code. If enabled, it allows field access to go beyond the end of a
6814 region definition if the field is within the region length rounded up to the
6815 next access width boundary (a common coding error.)
6817 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
6818 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
6819 symbols are lowercased by the latest version of the AcpiSrc tool.
6821 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
6822 rename "Register" to simply "Reg" to prevent certain compilers from
6825 Code and Data Size: Current and previous core subsystem library sizes are
6826 shown below. These are the code and data sizes for the acpica.lib produced
6827 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6828 any ACPI driver or OSPM code. The debug version of the code includes the
6829 debug output trace mechanism and has a much larger code and data size. Note
6830 that these values will vary depending on the efficiency of the compiler and
6831 the compiler options used during generation.
6834 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
6835 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
6837 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
6838 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
6841 2) iASL Compiler/Disassembler:
6843 Implemented full support for Package objects within the Case() operator.
6844 Note: The Break() operator is currently not supported within Case blocks
6845 (TermLists) as there is some question about backward compatibility with ACPI
6849 Fixed a problem where complex terms were not supported properly within the
6852 Eliminated extraneous warning for compiler-emitted reserved names of the
6853 form "_T_x". (Used in Switch/Case operators.)
6855 Eliminated optimization messages for "_T_x" objects and small constants
6856 within the DefinitionBlock operator.
6859 ----------------------------------------
6860 15 June 2004. Summary of changes for version 20040615:
6862 1) ACPI CA Core Subsystem:
6864 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
6865 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
6868 All directory names in the entire source package are lower case, as they
6869 were in earlier releases.
6871 Implemented "Disassemble" command in the AML debugger that will disassemble
6872 a single control method.
6874 Code and Data Size: Current and previous core subsystem library sizes are
6875 shown below. These are the code and data sizes for the acpica.lib produced
6876 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6877 any ACPI driver or OSPM code. The debug version of the code includes the
6878 debug output trace mechanism and has a much larger code and data size. Note
6879 that these values will vary depending on the efficiency of the compiler and
6880 the compiler options used during generation.
6883 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
6884 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
6887 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
6888 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
6891 2) iASL Compiler/Disassembler:
6893 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
6894 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
6897 All directory names in the entire source package are lower case, as they
6898 were in earlier releases.
6900 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
6903 Fixed an issue with the Windows version of the compiler where later versions
6904 of Windows place the FADT in the registry under the name "FADT" and not
6905 "FACP" as earlier versions did. This applies when using the -g or -
6906 d<nofilename> options. The compiler now looks for both strings as
6909 Fixed a problem with compiler namepath optimization where a namepath within
6910 the Scope() operator could not be optimized if the namepath was a subpath of
6911 the current scope path.
6913 ----------------------------------------
6914 27 May 2004. Summary of changes for version 20040527:
6916 1) ACPI CA Core Subsystem:
6918 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
6919 support in the RSDP scan code. The original code improperly scanned for the
6920 EBDA by simply scanning from memory location 0 to 0x400. The correct method
6921 is to first obtain the EBDA pointer from within the BIOS data area, then
6922 scan 1K of memory starting at the EBDA pointer. There appear to be few if
6923 any machines that place the RSDP in the EBDA, however.
6925 Integrated a fix for a possible fault during evaluation of BufferField
6926 arguments. Obsolete code that was causing the problem was removed.
6928 Found and fixed a problem in the Field Support Code where data could be
6929 corrupted on a bit field read that starts on an aligned boundary but does
6930 not end on an aligned boundary. Merged the read/write "datum length"
6931 calculation code into a common procedure.
6933 Rolled in a couple of changes to the FreeBSD-specific header.
6936 Code and Data Size: Current and previous core subsystem library sizes are
6937 shown below. These are the code and data sizes for the acpica.lib produced
6938 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6939 any ACPI driver or OSPM code. The debug version of the code includes the
6940 debug output trace mechanism and has a much larger code and data size. Note
6941 that these values will vary depending on the efficiency of the compiler and
6942 the compiler options used during generation.
6945 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6946 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
6948 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
6949 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
6952 2) iASL Compiler/Disassembler:
6954 Fixed a generation warning produced by some overly-verbose compilers for a
6957 ----------------------------------------
6958 14 May 2004. Summary of changes for version 20040514:
6960 1) ACPI CA Core Subsystem:
6962 Fixed a problem where hardware GPE enable bits sometimes not set properly
6963 during and after GPE method execution. Result of 04/27 changes.
6965 Removed extra "clear all GPEs" when sleeping/waking.
6967 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
6968 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
6969 the new AcpiEv* calls as appropriate.
6971 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
6972 now "Microsoft Windows NT" for maximum compatibility. However this can be
6973 changed by modifying the acconfig.h file.
6975 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
6976 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
6978 Run _INI methods on ThermalZone objects. This is against the ACPI
6979 specification, but there is apparently ASL code in the field that has these
6980 _INI methods, and apparently "other" AML interpreters execute them.
6982 Performed a full 16/32/64 bit lint that resulted in some small changes.
6984 Added a sleep simulation command to the AML debugger to test sleep code.
6986 Code and Data Size: Current and previous core subsystem library sizes are
6987 shown below. These are the code and data sizes for the acpica.lib produced
6988 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6989 any ACPI driver or OSPM code. The debug version of the code includes the
6990 debug output trace mechanism and has a much larger code and data size. Note
6991 that these values will vary depending on the efficiency of the compiler and
6992 the compiler options used during generation.
6995 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6996 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
6998 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6999 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
7001 ----------------------------------------
7002 27 April 2004. Summary of changes for version 20040427:
7004 1) ACPI CA Core Subsystem:
7006 Completed a major overhaul of the GPE handling within ACPI CA. There are
7007 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
7008 The only GPEs allowed to be combination wake/run are for button-style
7009 devices such as a control-method power button, control-method sleep button,
7010 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
7011 referenced by any _PRW methods are marked for "runtime" and hardware
7012 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
7013 (and disabled at runtime). However, at sleep time, only those GPEs that
7014 have been specifically enabled for wake via the AcpiEnableGpe interface will
7015 actually be hardware enabled.
7017 A new external interface has been added, AcpiSetGpeType(), that is meant to
7018 be used by device drivers to force a GPE to a particular type. It will be
7019 especially useful for the drivers for the button devices mentioned above.
7021 Completed restructuring of the ACPI CA initialization sequence so that
7022 default operation region handlers are installed before GPEs are initialized
7023 and the _PRW methods are executed. This will prevent errors when the _PRW
7024 methods attempt to access system memory or I/O space.
7026 GPE enable/disable no longer reads the GPE enable register. We now keep the
7027 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
7028 thus no longer depend on the hardware to maintain these bits.
7030 Always clear the wake status and fixed/GPE status bits before sleep, even
7033 Improved the AML debugger output for displaying the GPE blocks and their
7036 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
7039 Fixed a problem where the physical address was incorrectly calculated when
7040 the Load() operator was used to directly load from an Operation Region (vs.
7041 loading from a Field object.) Also added check for minimum table length for
7044 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
7047 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
7048 consistency with the other fields returned.
7050 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
7051 structure for each GPE in the system, so the size of this structure is
7054 CPU stack requirement reduction: Cleaned up the method execution and object
7055 evaluation paths so that now a parameter structure is passed, instead of
7056 copying the various method parameters over and over again.
7058 In evregion.c: Correctly exit and reenter the interpreter region if and
7059 only if dispatching an operation region request to a user-installed handler.
7060 Do not exit/reenter when dispatching to a default handler (e.g., default
7061 system memory or I/O handlers)
7064 Notes for updating drivers for the new GPE support. The following changes
7065 must be made to ACPI-related device drivers that are attached to one or more
7066 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
7068 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
7069 explicitly call AcpiEnableGpe.
7070 2) There is a new interface called AcpiSetGpeType. This should be called
7071 before enabling the GPE. Also, this interface will automatically disable
7072 the GPE if it is currently enabled.
7073 3) AcpiEnableGpe no longer supports a GPE type flag.
7075 Specific drivers that must be changed:
7077 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
7078 AeGpeHandler, NULL);
7079 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
7080 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
7082 2) Button Drivers (Power, Lid, Sleep):
7083 Run _PRW method under parent device
7084 If _PRW exists: /* This is a control-method button */
7085 Extract GPE number and possibly GpeDevice
7086 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
7087 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
7089 For all other devices that have _PRWs, we automatically set the GPE type to
7090 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
7091 must be done on a selective basis, usually requiring some kind of user app
7092 to allow the user to pick the wake devices.
7095 Code and Data Size: Current and previous core subsystem library sizes are
7096 shown below. These are the code and data sizes for the acpica.lib produced
7097 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7098 any ACPI driver or OSPM code. The debug version of the code includes the
7099 debug output trace mechanism and has a much larger code and data size. Note
7100 that these values will vary depending on the efficiency of the compiler and
7101 the compiler options used during generation.
7104 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
7105 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
7108 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
7109 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
7113 ----------------------------------------
7114 02 April 2004. Summary of changes for version 20040402:
7116 1) ACPI CA Core Subsystem:
7118 Fixed an interpreter problem where an indirect store through an ArgX
7119 parameter was incorrectly applying the "implicit conversion rules" during
7120 the store. From the ACPI specification: "If the target is a method local or
7121 argument (LocalX or ArgX), no conversion is performed and the result is
7122 stored directly to the target". The new behavior is to disable implicit
7123 conversion during ALL stores to an ArgX.
7125 Changed the behavior of the _PRW method scan to ignore any and all errors
7126 returned by a given _PRW. This prevents the scan from aborting from the
7127 failure of any single _PRW.
7129 Moved the runtime configuration parameters from the global init procedure to
7130 static variables in acglobal.h. This will allow the host to override the
7131 default values easily.
7133 Code and Data Size: Current and previous core subsystem library sizes are
7134 shown below. These are the code and data sizes for the acpica.lib produced
7135 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7136 any ACPI driver or OSPM code. The debug version of the code includes the
7137 debug output trace mechanism and has a much larger code and data size. Note
7138 that these values will vary depending on the efficiency of the compiler and
7139 the compiler options used during generation.
7142 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
7143 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
7145 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
7146 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
7149 2) iASL Compiler/Disassembler:
7151 iASL now fully disassembles SSDTs. However, External() statements are not
7152 generated automatically for unresolved symbols at this time. This is a
7153 planned feature for future implementation.
7155 Fixed a scoping problem in the disassembler that occurs when the type of the
7156 target of a Scope() operator is overridden. This problem caused an
7157 incorrectly nested internal namespace to be constructed.
7159 Any warnings or errors that are emitted during disassembly are now commented
7160 out automatically so that the resulting file can be recompiled without any
7163 ----------------------------------------
7164 26 March 2004. Summary of changes for version 20040326:
7166 1) ACPI CA Core Subsystem:
7168 Implemented support for "wake" GPEs via interaction between GPEs and the
7169 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
7170 identified as a WAKE GPE and by default will no longer be enabled at
7171 runtime. Previously, we were blindly enabling all GPEs with a corresponding
7172 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
7173 believe this has been the cause of thousands of "spurious" GPEs on some
7176 This new GPE behavior is can be reverted to the original behavior (enable
7177 ALL GPEs at runtime) via a runtime flag.
7179 Fixed a problem where aliased control methods could not access objects
7180 properly. The proper scope within the namespace was not initialized
7181 (transferred to the target of the aliased method) before executing the
7184 Fixed a potential race condition on internal object deletion on the return
7185 object in AcpiEvaluateObject.
7187 Integrated a fix for resource descriptors where both _MEM and _MTP were
7188 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
7189 wide, 0x0F instead of 0x03.)
7191 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
7192 fault in some cases.
7194 Updated Notify() values for debug statements in evmisc.c
7196 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
7198 Code and Data Size: Current and previous core subsystem library sizes are
7199 shown below. These are the code and data sizes for the acpica.lib produced
7200 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7201 any ACPI driver or OSPM code. The debug version of the code includes the
7202 debug output trace mechanism and has a much larger code and data size. Note
7203 that these values will vary depending on the efficiency of the compiler and
7204 the compiler options used during generation.
7208 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
7209 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
7211 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
7212 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
7214 ----------------------------------------
7215 11 March 2004. Summary of changes for version 20040311:
7217 1) ACPI CA Core Subsystem:
7219 Fixed a problem where errors occurring during the parse phase of control
7220 method execution did not abort cleanly. For example, objects created and
7221 installed in the namespace were not deleted. This caused all subsequent
7222 invocations of the method to return the AE_ALREADY_EXISTS exception.
7224 Implemented a mechanism to force a control method to "Serialized" execution
7225 if the method attempts to create namespace objects. (The root of the
7226 AE_ALREADY_EXISTS problem.)
7228 Implemented support for the predefined _OSI "internal" control method.
7229 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
7230 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
7231 This feature will allow "other" operating systems to execute the fully
7232 tested, "Windows" code path through the ASL code
7234 Global Lock Support: Now allows multiple acquires and releases with any
7235 internal thread. Removed concept of "owning thread" for this special mutex.
7237 Fixed two functions that were inappropriately declaring large objects on the
7238 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
7239 method execution considerably.
7241 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
7242 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
7244 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
7245 defined on the machine.
7247 Implemented two runtime options: One to force all control method execution
7248 to "Serialized" to mimic Windows behavior, another to disable _OSI support
7249 if it causes problems on a given machine.
7251 Code and Data Size: Current and previous core subsystem library sizes are
7252 shown below. These are the code and data sizes for the acpica.lib produced
7253 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7254 any ACPI driver or OSPM code. The debug version of the code includes the
7255 debug output trace mechanism and has a much larger code and data size. Note
7256 that these values will vary depending on the efficiency of the compiler and
7257 the compiler options used during generation.
7260 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
7261 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
7263 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
7264 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
7266 2) iASL Compiler/Disassembler:
7268 Fixed an array size problem for FreeBSD that would cause the compiler to
7271 ----------------------------------------
7272 20 February 2004. Summary of changes for version 20040220:
7275 1) ACPI CA Core Subsystem:
7277 Implemented execution of _SxD methods for Device objects in the
7278 GetObjectInfo interface.
7280 Fixed calls to _SST method to pass the correct arguments.
7282 Added a call to _SST on wake to restore to "working" state.
7284 Check for End-Of-Buffer failure case in the WalkResources interface.
7286 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
7287 structures to the beginning of the file.
7289 After wake, clear GPE status register(s) before enabling GPEs.
7291 After wake, clear/enable power button. (Perhaps we should clear/enable all
7292 fixed events upon wake.)
7294 Fixed a couple of possible memory leaks in the Namespace manager.
7296 Integrated latest acnetbsd.h file.
7298 ----------------------------------------
7299 11 February 2004. Summary of changes for version 20040211:
7302 1) ACPI CA Core Subsystem:
7304 Completed investigation and implementation of the call-by-reference
7305 mechanism for control method arguments.
7307 Fixed a problem where a store of an object into an indexed package could
7308 fail if the store occurs within a different method than the method that
7309 created the package.
7311 Fixed a problem where the ToDecimal operator could return incorrect results.
7313 Fixed a problem where the CopyObject operator could fail on some of the more
7314 obscure objects (e.g., Reference objects.)
7316 Improved the output of the Debug object to display buffer, package, and
7319 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
7320 the expected result.
7322 Added permanent ACPI_REPORT_ERROR macros for all instances of the
7323 ACPI_AML_INTERNAL exception.
7325 Integrated latest version of acfreebsd.h
7327 ----------------------------------------
7328 16 January 2004. Summary of changes for version 20040116:
7330 The purpose of this release is primarily to update the copyright years in
7331 each module, thus causing a huge number of diffs. There are a few small
7332 functional changes, however.
7334 1) ACPI CA Core Subsystem:
7336 Improved error messages when there is a problem finding one or more of the
7337 required base ACPI tables
7339 Reintroduced the definition of APIC_HEADER in actbl.h
7341 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
7343 Removed extraneous reference to NewObj in dsmthdat.c
7347 Fixed a problem introduced in December that disabled the correct disassembly
7348 of Resource Templates
7351 ----------------------------------------
7352 03 December 2003. Summary of changes for version 20031203:
7354 1) ACPI CA Core Subsystem:
7356 Changed the initialization of Operation Regions during subsystem
7357 init to perform two entire walks of the ACPI namespace; The first
7358 to initialize the regions themselves, the second to execute the
7359 _REG methods. This fixed some interdependencies across _REG
7360 methods found on some machines.
7362 Fixed a problem where a Store(Local0, Local1) could simply update
7363 the object reference count, and not create a new copy of the
7364 object if the Local1 is uninitialized.
7366 Implemented support for the _SST reserved method during sleep
7369 Implemented support to clear the SLP_TYP and SLP_EN bits when
7370 waking up, this is apparently required by some machines.
7372 When sleeping, clear the wake status only if SleepState is not S5.
7374 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
7375 pointer arithmetic advanced a string pointer too far.
7377 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
7378 could be returned if the requested table has not been loaded.
7380 Within the support for IRQ resources, restructured the handling of
7381 the active and edge/level bits.
7383 Fixed a few problems in AcpiPsxExecute() where memory could be
7384 leaked under certain error conditions.
7386 Improved error messages for the cases where the ACPI mode could
7389 Code and Data Size: Current and previous core subsystem library
7390 sizes are shown below. These are the code and data sizes for the
7391 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
7392 these values do not include any ACPI driver or OSPM code. The
7393 debug version of the code includes the debug output trace
7394 mechanism and has a much larger code and data size. Note that
7395 these values will vary depending on the efficiency of the compiler
7396 and the compiler options used during generation.
7398 Previous Release (20031029):
7399 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
7400 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
7402 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
7403 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
7405 2) iASL Compiler/Disassembler:
7407 Implemented a fix for the iASL disassembler where a bad index was
7408 generated. This was most noticeable on 64-bit platforms
7411 ----------------------------------------
7412 29 October 2003. Summary of changes for version 20031029:
7414 1) ACPI CA Core Subsystem:
7417 Fixed a problem where a level-triggered GPE with an associated
7418 _Lxx control method was incorrectly cleared twice.
7420 Fixed a problem with the Field support code where an access can
7421 occur beyond the end-of-region if the field is non-aligned but
7422 extends to the very end of the parent region (resulted in an
7423 AE_AML_REGION_LIMIT exception.)
7425 Fixed a problem with ACPI Fixed Events where an RT Clock handler
7426 would not get invoked on an RTC event. The RTC event bitmasks for
7427 the PM1 registers were not being initialized properly.
7429 Implemented support for executing _STA and _INI methods for
7430 Processor objects. Although this is currently not part of the
7431 ACPI specification, there is existing ASL code that depends on the
7432 init-time execution of these methods.
7434 Implemented and deployed a GetDescriptorName function to decode
7435 the various types of internal descriptors. Guards against null
7436 descriptors during debug output also.
7438 Implemented and deployed a GetNodeName function to extract the 4-
7439 character namespace node name. This function simplifies the debug
7440 and error output, as well as guarding against null pointers during
7443 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
7444 simplify the debug and error output of 64-bit integers. This
7445 macro replaces the HIDWORD and LODWORD macros for dumping these
7448 Updated the implementation of the Stall() operator to only call
7449 AcpiOsStall(), and also return an error if the operand is larger
7450 than 255. This preserves the required behavior of not
7451 relinquishing the processor, as would happen if AcpiOsSleep() was
7452 called for "long stalls".
7454 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
7455 initialized are now treated as NOOPs.
7457 Cleaned up a handful of warnings during 64-bit generation.
7459 Fixed a reported error where and incorrect GPE number was passed
7460 to the GPE dispatch handler. This value is only used for error
7461 output, however. Used this opportunity to clean up and streamline
7462 the GPE dispatch code.
7464 Code and Data Size: Current and previous core subsystem library
7465 sizes are shown below. These are the code and data sizes for the
7466 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
7467 these values do not include any ACPI driver or OSPM code. The
7469 debug version of the code includes the debug output trace
7470 mechanism and has a much larger code and data size. Note that
7471 these values will vary depending on the efficiency of the compiler
7472 and the compiler options used during generation.
7474 Previous Release (20031002):
7475 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
7476 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
7478 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
7479 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
7482 2) iASL Compiler/Disassembler:
7484 Updated the iASL compiler to return an error if the operand to the
7485 Stall() operator is larger than 255.
7488 ----------------------------------------
7489 02 October 2003. Summary of changes for version 20031002:
7492 1) ACPI CA Core Subsystem:
7494 Fixed a problem with Index Fields where the index was not
7495 incremented for fields that require multiple writes to the
7496 index/data registers (Fields that are wider than the data
7499 Fixed a problem with all Field objects where a write could go
7500 beyond the end-of-field if the field was larger than the access
7501 granularity and therefore required multiple writes to complete the
7502 request. An extra write beyond the end of the field could happen
7505 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
7506 would incorrectly be returned if the width of the Data Register
7507 was larger than the specified field access width.
7509 Completed fixes for LoadTable() and Unload() and verified their
7510 operation. Implemented full support for the "DdbHandle" object
7511 throughout the ACPI CA subsystem.
7513 Implemented full support for the MADT and ECDT tables in the ACPI
7514 CA header files. Even though these tables are not directly
7515 consumed by ACPI CA, the header definitions are useful for ACPI
7518 Integrated resource descriptor fixes posted to the Linux ACPI
7519 list. This included checks for minimum descriptor length, and
7520 support for trailing NULL strings within descriptors that have
7521 optional string elements.
7523 Code and Data Size: Current and previous core subsystem library
7524 sizes are shown below. These are the code and data sizes for the
7525 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
7526 these values do not include any ACPI driver or OSPM code. The
7527 debug version of the code includes the debug output trace
7528 mechanism and has a much larger code and data size. Note that
7529 these values will vary depending on the efficiency of the compiler
7530 and the compiler options used during generation.
7532 Previous Release (20030918):
7533 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
7534 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
7536 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
7537 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
7542 Implemented detection of non-ASCII characters within the input
7543 source ASL file. This catches attempts to compile binary (AML)
7544 files early in the compile, with an informative error message.
7546 Fixed a problem where the disassembler would fault if the output
7547 filename could not be generated or if the output file could not be
7550 ----------------------------------------
7551 18 September 2003. Summary of changes for version 20030918:
7554 1) ACPI CA Core Subsystem:
7556 Found and fixed a longstanding problem with the late execution of
7557 the various deferred AML opcodes (such as Operation Regions,
7558 Buffer Fields, Buffers, and Packages). If the name string
7559 specified for the name of the new object placed the object in a
7560 scope other than the current scope, the initialization/execution
7561 of the opcode failed. The solution to this problem was to
7562 implement a mechanism where the late execution of such opcodes
7563 does not attempt to lookup/create the name a second time in an
7564 incorrect scope. This fixes the "region size computed
7565 incorrectly" problem.
7567 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
7568 Global Lock AE_BAD_PARAMETER error.
7570 Fixed several 64-bit issues with prototypes, casting and data
7573 Removed duplicate prototype from acdisasm.h
7575 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
7577 Code and Data Size: Current and previous core subsystem library
7578 sizes are shown below. These are the code and data sizes for the
7579 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
7580 these values do not include any ACPI driver or OSPM code. The
7581 debug version of the code includes the debug output trace
7582 mechanism and has a much larger code and data size. Note that
7583 these values will vary depending on the efficiency of the compiler
7584 and the compiler options used during generation.
7588 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
7589 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
7591 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
7592 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
7597 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
7598 correct sleep time in seconds.
7600 ----------------------------------------
7601 14 July 2003. Summary of changes for version 20030619:
7603 1) ACPI CA Core Subsystem:
7605 Parse SSDTs in order discovered, as opposed to reverse order
7608 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
7615 Dynamically allocate SDT list (suggested by Andi Kleen)
7617 proc function return value cleanups (Andi Kleen)
7619 Correctly handle NMI watchdog during long stalls (Andrew Morton)
7621 Make it so acpismp=force works (reported by Andrew Morton)
7624 ----------------------------------------
7625 19 June 2003. Summary of changes for version 20030619:
7627 1) ACPI CA Core Subsystem:
7629 Fix To/FromBCD, eliminating the need for an arch-specific #define.
7631 Do not acquire a semaphore in the S5 shutdown path.
7633 Fix ex_digits_needed for 0. (Takayoshi Kochi)
7635 Fix sleep/stall code reversal. (Andi Kleen)
7637 Revert a change having to do with control method calling
7642 acpiphp update (Takayoshi Kochi)
7644 Export acpi_disabled for sonypi (Stelian Pop)
7646 Mention acpismp=force in config help
7648 Re-add acpitable.c and acpismp=force. This improves backwards
7650 compatibility and also cleans up the code to a significant degree.
7652 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
7654 ----------------------------------------
7655 22 May 2003. Summary of changes for version 20030522:
7657 1) ACPI CA Core Subsystem:
7659 Found and fixed a reported problem where an AE_NOT_FOUND error
7660 occurred occasionally during _BST evaluation. This turned out to
7661 be an Owner ID allocation issue where a called method did not get
7662 a new ID assigned to it. Eventually, (after 64k calls), the Owner
7663 ID UINT16 would wraparound so that the ID would be the same as the
7664 caller's and the called method would delete the caller's
7667 Implemented extended error reporting for control methods that are
7668 aborted due to a run-time exception. Output includes the exact
7669 AML instruction that caused the method abort, a dump of the method
7670 locals and arguments at the time of the abort, and a trace of all
7671 nested control method calls.
7673 Modified the interpreter to allow the creation of buffers of zero
7674 length from the AML code. Implemented new code to ensure that no
7675 attempt is made to actually allocate a memory buffer (of length
7676 zero) - instead, a simple buffer object with a NULL buffer pointer
7677 and length zero is created. A warning is no longer issued when
7678 the AML attempts to create a zero-length buffer.
7680 Implemented a workaround for the "leading asterisk issue" in
7681 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
7682 asterisk is automatically removed if present in any HID, UID, or
7683 CID strings. The iASL compiler will still flag this asterisk as
7686 Implemented full support for _CID methods that return a package of
7687 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
7688 now additionally returns a device _CID list if present. This
7689 required a change to the external interface in order to pass an
7690 ACPI_BUFFER object as a parameter since the _CID list is of
7693 Fixed a problem with the new AE_SAME_HANDLER exception where
7694 handler initialization code did not know about this exception.
7696 Code and Data Size: Current and previous core subsystem library
7697 sizes are shown below. These are the code and data sizes for the
7698 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
7699 these values do not include any ACPI driver or OSPM code. The
7700 debug version of the code includes the debug output trace
7701 mechanism and has a much larger code and data size. Note that
7702 these values will vary depending on the efficiency of the compiler
7703 and the compiler options used during generation.
7705 Previous Release (20030509):
7706 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
7707 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
7709 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
7710 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
7715 Fixed a bug in which we would reinitialize the ACPI interrupt
7716 after it was already working, thus disabling all ACPI and the IRQs
7717 for any other device sharing the interrupt. (Thanks to Stian
7720 Toshiba driver update (John Belmonte)
7722 Return only 0 or 1 for our interrupt handler status (Andrew
7728 Fixed a reported problem where multiple (nested) ElseIf()
7729 statements were not handled correctly by the compiler, resulting
7730 in incorrect warnings and incorrect AML code. This was a problem
7731 in both the ASL parser and the code generator.
7736 Added changes to existing interfaces, new exception codes, and new
7737 text concerning reference count object management versus garbage
7740 ----------------------------------------
7741 09 May 2003. Summary of changes for version 20030509.
7744 1) ACPI CA Core Subsystem:
7746 Changed the subsystem initialization sequence to hold off
7747 installation of address space handlers until the hardware has been
7748 initialized and the system has entered ACPI mode. This is because
7749 the installation of space handlers can cause _REG methods to be
7750 run. Previously, the _REG methods could potentially be run before
7751 ACPI mode was enabled.
7753 Fixed some memory leak issues related to address space handler and
7754 notify handler installation. There were some problems with the
7755 reference count mechanism caused by the fact that the handler
7756 objects are shared across several namespace objects.
7758 Fixed a reported problem where reference counts within the
7759 namespace were not properly updated when named objects created by
7760 method execution were deleted.
7762 Fixed a reported problem where multiple SSDTs caused a deletion
7763 issue during subsystem termination. Restructured the table data
7764 structures to simplify the linked lists and the related code.
7766 Fixed a problem where the table ID associated with secondary
7767 tables (SSDTs) was not being propagated into the namespace objects
7768 created by those tables. This would only present a problem for
7769 tables that are unloaded at run-time, however.
7771 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
7772 type as the length parameter (instead of UINT32).
7774 Solved a long-standing problem where an ALREADY_EXISTS error
7775 appears on various systems. This problem could happen when there
7776 are multiple PCI_Config operation regions under a single PCI root
7777 bus. This doesn't happen very frequently, but there are some
7778 systems that do this in the ASL.
7780 Fixed a reported problem where the internal DeleteNode function
7781 was incorrectly handling the case where a namespace node was the
7782 first in the parent's child list, and had additional peers (not
7783 the only child, but first in the list of children.)
7785 Code and Data Size: Current core subsystem library sizes are shown
7786 below. These are the code and data sizes for the acpica.lib
7787 produced by the Microsoft Visual C++ 6.0 compiler, and these
7788 values do not include any ACPI driver or OSPM code. The debug
7789 version of the code includes the debug output trace mechanism and
7790 has a much larger code and data size. Note that these values will
7791 vary depending on the efficiency of the compiler and the compiler
7792 options used during generation.
7795 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
7796 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
7798 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
7799 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
7804 Allow ":" in OS override string (Ducrot Bruno)
7806 Kobject fix (Greg KH)
7809 3 iASL Compiler/Disassembler:
7811 Fixed a problem in the generation of the C source code files (AML
7812 is emitted in C source statements for BIOS inclusion) where the
7813 Ascii dump that appears within a C comment at the end of each line
7814 could cause a compile time error if the AML sequence happens to
7815 have an open comment or close comment sequence embedded.
7818 ----------------------------------------
7819 24 April 2003. Summary of changes for version 20030424.
7822 1) ACPI CA Core Subsystem:
7824 Support for big-endian systems has been implemented. Most of the
7825 support has been invisibly added behind big-endian versions of the
7828 Fixed a problem in AcpiHwDisableGpeBlock() and
7829 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
7830 low level hardware write routine. The offset parameter was
7831 actually eliminated from the low level read/write routines because
7832 they had become obsolete.
7834 Fixed a problem where a handler object was deleted twice during
7835 the removal of a fixed event handler.
7840 A fix for SMP systems with link devices was contributed by
7844 (2.5) Return whether we handled the interrupt in our IRQ handler.
7845 (Linux ISRs no longer return void, so we can propagate the handler
7846 return value from the ACPI CA core back to the OS.)
7852 The ACPI CA Programmer Reference has been updated to reflect new
7853 interfaces and changes to existing interfaces.
7855 ----------------------------------------
7856 28 March 2003. Summary of changes for version 20030328.
7858 1) ACPI CA Core Subsystem:
7860 The GPE Block Device support has been completed. New interfaces
7861 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
7862 interfaces (enable, disable, clear, getstatus) have been split
7863 into separate interfaces for Fixed Events and General Purpose
7864 Events (GPEs) in order to support GPE Block Devices properly.
7866 Fixed a problem where the error message "Failed to acquire
7867 semaphore" would appear during operations on the embedded
7870 Code and Data Size: Current core subsystem library sizes are shown
7871 below. These are the code and data sizes for the acpica.lib
7872 produced by the Microsoft Visual C++ 6.0 compiler, and these
7873 values do not include any ACPI driver or OSPM code. The debug
7874 version of the code includes the debug output trace mechanism and
7875 has a much larger code and data size. Note that these values will
7876 vary depending on the efficiency of the compiler and the compiler
7877 options used during generation.
7880 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
7881 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
7883 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
7884 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
7887 ----------------------------------------
7888 28 February 2003. Summary of changes for version 20030228.
7891 1) ACPI CA Core Subsystem:
7893 The GPE handling and dispatch code has been completely overhauled
7894 in preparation for support of GPE Block Devices (ID ACPI0006).
7895 This affects internal data structures and code only; there should
7896 be no differences visible externally. One new file has been
7899 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
7900 fields that are used to determine the GPE block lengths. The
7901 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
7902 structures are ignored. This is per the ACPI specification but it
7903 isn't very clear. The full 256 Block 0/1 GPEs are now supported
7904 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
7906 In the SCI interrupt handler, removed the read of the PM1_CONTROL
7907 register to look at the SCI_EN bit. On some machines, this read
7908 causes an SMI event and greatly slows down SCI events. (This may
7909 in fact be the cause of slow battery status response on some
7912 Fixed a problem where a store of a NULL string to a package object
7913 could cause the premature deletion of the object. This was seen
7914 during execution of the battery _BIF method on some systems,
7915 resulting in no battery data being returned.
7917 Added AcpiWalkResources interface to simplify parsing of resource
7920 Code and Data Size: Current core subsystem library sizes are shown
7921 below. These are the code and data sizes for the acpica.lib
7922 produced by the Microsoft Visual C++ 6.0 compiler, and these
7923 values do not include any ACPI driver or OSPM code. The debug
7924 version of the code includes the debug output trace mechanism and
7925 has a much larger code and data size. Note that these values will
7926 vary depending on the efficiency of the compiler and the compiler
7927 options used during generation.
7930 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
7931 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
7933 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
7934 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
7939 S3 fixes (Ole Rohne)
7941 Update ACPI PHP driver with to use new acpi_walk_resource API
7944 Add S4BIOS support (Pavel Machek)
7946 Map in entire table before performing checksum (John Stultz)
7948 Expand the mem= cmdline to allow the specification of reserved and
7949 ACPI DATA blocks (Pavel Machek)
7951 Never use ACPI on VISWS
7953 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
7955 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
7956 causing us to think that some systems support C2 when they really
7959 Do not count processor objects for non-present CPUs (Thanks to
7965 Fixed a problem where ASL include files could not be found and
7968 Added support for the _PDC reserved name.
7971 ----------------------------------------
7972 22 January 2003. Summary of changes for version 20030122.
7975 1) ACPI CA Core Subsystem:
7977 Added a check for constructs of the form: Store (Local0, Local0)
7978 where Local0 is not initialized. Apparently, some BIOS
7979 programmers believe that this is a NOOP. Since this store doesn't
7980 do anything anyway, the new prototype behavior will ignore this
7981 error. This is a case where we can relax the strict checking in
7982 the interpreter in the name of compatibility.
7987 The AcpiSrc Source Conversion Utility has been released with the
7988 Linux package for the first time. This is the utility that is
7989 used to convert the ACPI CA base source code to the Linux version.
7991 (Both) Handle P_BLK lengths shorter than 6 more gracefully
7993 (Both) Move more headers to include/acpi, and delete an unused
7996 (Both) Move drivers/acpi/include directory to include/acpi
7998 (Both) Boot functions don't use cmdline, so don't pass it around
8000 (Both) Remove include of unused header (Adrian Bunk)
8002 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
8004 former now also includes the latter, acpiphp.h only needs the one,
8007 (2.5) Make it possible to select method of bios restoring after S3
8008 resume. [=> no more ugly ifdefs] (Pavel Machek)
8010 (2.5) Make proc write interfaces work (Pavel Machek)
8012 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
8014 (2.5) Break out ACPI Perf code into its own module, under cpufreq
8017 (2.4) S4BIOS support (Ducrot Bruno)
8019 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
8025 Added support to disassemble SSDT and PSDTs.
8027 Implemented support to obtain SSDTs from the Windows registry if
8031 ----------------------------------------
8032 09 January 2003. Summary of changes for version 20030109.
8034 1) ACPI CA Core Subsystem:
8036 Changed the behavior of the internal Buffer-to-String conversion
8037 function. The current ACPI specification states that the contents
8038 of the buffer are "converted to a string of two-character
8039 hexadecimal numbers, each separated by a space". Unfortunately,
8040 this definition is not backwards compatible with existing ACPI 1.0
8041 implementations (although the behavior was not defined in the ACPI
8042 1.0 specification). The new behavior simply copies data from the
8043 buffer to the string until a null character is found or the end of
8044 the buffer is reached. The new String object is always null
8045 terminated. This problem was seen during the generation of _BIF
8046 battery data where incorrect strings were returned for battery
8047 type, etc. This will also require an errata to the ACPI
8050 Renamed all instances of NATIVE_UINT and NATIVE_INT to
8051 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
8053 Copyright in all module headers (both Linux and non-Linux) has be
8056 Code and Data Size: Current core subsystem library sizes are shown
8057 below. These are the code and data sizes for the acpica.lib
8058 produced by the Microsoft Visual C++ 6.0 compiler, and these
8059 values do not include any ACPI driver or OSPM code. The debug
8060 version of the code includes the debug output trace mechanism and
8061 has a much larger code and data size. Note that these values will
8062 vary depending on the efficiency of the compiler and the compiler
8063 options used during generation.
8066 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
8067 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
8069 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
8070 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
8075 Fixed an oops on module insertion/removal (Matthew Tippett)
8077 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
8079 (2.5) Replace pr_debug (Randy Dunlap)
8081 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
8083 (Both) Eliminate spawning of thread from timer callback, in favor
8086 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
8088 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
8090 (Both) Add missing statics to button.c (Pavel Machek)
8092 Several changes have been made to the source code translation
8093 utility that generates the Linux Code in order to make the code
8096 All typedefs on structs and unions have been removed in keeping
8097 with the Linux coding style.
8099 Removed the non-Linux SourceSafe module revision number from each
8102 Completed major overhaul of symbols to be lowercased for linux.
8103 Doubled the number of symbols that are lowercased.
8105 Fixed a problem where identifiers within procedure headers and
8106 within quotes were not fully lower cased (they were left with a
8109 Some C macros whose only purpose is to allow the generation of 16-
8110 bit code are now completely removed in the Linux code, increasing
8111 readability and maintainability.
8113 ----------------------------------------
8115 12 December 2002. Summary of changes for version 20021212.
8118 1) ACPI CA Core Subsystem:
8120 Fixed a problem where the creation of a zero-length AML Buffer
8121 would cause a fault.
8123 Fixed a problem where a Buffer object that pointed to a static AML
8124 buffer (in an ACPI table) could inadvertently be deleted, causing
8127 Fixed a problem where a user buffer (passed in to the external
8128 ACPI CA interfaces) could be overwritten if the buffer was too
8129 small to complete the operation, causing memory corruption.
8131 Fixed a problem in the Buffer-to-String conversion code where a
8132 string of length one was always returned, regardless of the size
8133 of the input Buffer object.
8135 Removed the NATIVE_CHAR data type across the entire source due to
8136 lack of need and lack of consistent use.
8138 Code and Data Size: Current core subsystem library sizes are shown
8139 below. These are the code and data sizes for the acpica.lib
8140 produced by the Microsoft Visual C++ 6.0 compiler, and these
8141 values do not include any ACPI driver or OSPM code. The debug
8142 version of the code includes the debug output trace mechanism and
8143 has a much larger code and data size. Note that these values will
8144 vary depending on the efficiency of the compiler and the compiler
8145 options used during generation.
8148 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
8149 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
8151 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
8152 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
8155 ----------------------------------------
8156 05 December 2002. Summary of changes for version 20021205.
8158 1) ACPI CA Core Subsystem:
8160 Fixed a problem where a store to a String or Buffer object could
8161 cause corruption of the DSDT if the object type being stored was
8162 the same as the target object type and the length of the object
8163 being stored was equal to or smaller than the original (existing)
8164 target object. This was seen to cause corruption of battery _BIF
8165 buffers if the _BIF method modified the buffer on the fly.
8167 Fixed a problem where an internal error was generated if a control
8168 method invocation was used in an OperationRegion, Buffer, or
8169 Package declaration. This was caused by the deferred parsing of
8170 the control method and thus the deferred creation of the internal
8171 method object. The solution to this problem was to create the
8172 internal method object at the moment the method is encountered in
8173 the first pass - so that subsequent references to the method will
8174 able to obtain the required parameter count and thus properly
8175 parse the method invocation. This problem presented itself as an
8176 AE_AML_INTERNAL during the pass 1 parse phase during table load.
8178 Fixed a problem where the internal String object copy routine did
8179 not always allocate sufficient memory for the target String object
8180 and caused memory corruption. This problem was seen to cause
8181 "Allocation already present in list!" errors as memory allocation
8184 Implemented a new function for the evaluation of namespace objects
8185 that allows the specification of the allowable return object
8186 types. This simplifies a lot of code that checks for a return
8187 object of one or more specific objects returned from the
8188 evaluation (such as _STA, etc.) This may become and external
8189 function if it would be useful to ACPI-related drivers.
8191 Completed another round of prefixing #defines with "ACPI_" for
8194 Completed additional code restructuring to allow more modular
8195 linking for iASL compiler and AcpiExec. Several files were split
8196 creating new files. New files: nsparse.c dsinit.c evgpe.c
8198 Implemented an abort mechanism to terminate an executing control
8199 method via the AML debugger. This feature is useful for debugging
8200 control methods that depend (wait) for specific hardware
8203 Code and Data Size: Current core subsystem library sizes are shown
8204 below. These are the code and data sizes for the acpica.lib
8205 produced by the Microsoft Visual C++ 6.0 compiler, and these
8206 values do not include any ACPI driver or OSPM code. The debug
8207 version of the code includes the debug output trace mechanism and
8208 has a much larger code and data size. Note that these values will
8209 vary depending on the efficiency of the compiler and the compiler
8210 options used during generation.
8213 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
8214 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
8216 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
8217 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
8220 2) iASL Compiler/Disassembler
8222 Fixed a compiler code generation problem for "Interrupt" Resource
8223 Descriptors. If specified in the ASL, the optional "Resource
8224 Source Index" and "Resource Source" fields were not inserted into
8225 the correct location within the AML resource descriptor, creating
8226 an invalid descriptor.
8228 Fixed a disassembler problem for "Interrupt" resource descriptors.
8229 The optional "Resource Source Index" and "Resource Source" fields
8233 ----------------------------------------
8234 22 November 2002. Summary of changes for version 20021122.
8237 1) ACPI CA Core Subsystem:
8239 Fixed a reported problem where an object stored to a Method Local
8240 or Arg was not copied to a new object during the store - the
8241 object pointer was simply copied to the Local/Arg. This caused
8242 all subsequent operations on the Local/Arg to also affect the
8243 original source of the store operation.
8245 Fixed a problem where a store operation to a Method Local or Arg
8246 was not completed properly if the Local/Arg contained a reference
8247 (from RefOf) to a named field. The general-purpose store-to-
8248 namespace-node code is now used so that this case is handled
8251 Fixed a problem where the internal object copy routine would cause
8252 a protection fault if the object being copied was a Package and
8253 contained either 1) a NULL package element or 2) a nested sub-
8256 Fixed a problem with the GPE initialization that resulted from an
8257 ambiguity in the ACPI specification. One section of the
8258 specification states that both the address and length of the GPE
8259 block must be zero if the block is not supported. Another section
8260 implies that only the address need be zero if the block is not
8261 supported. The code has been changed so that both the address and
8262 the length must be non-zero to indicate a valid GPE block (i.e.,
8263 if either the address or the length is zero, the GPE block is
8266 Code and Data Size: Current core subsystem library sizes are shown
8267 below. These are the code and data sizes for the acpica.lib
8268 produced by the Microsoft Visual C++ 6.0 compiler, and these
8269 values do not include any ACPI driver or OSPM code. The debug
8270 version of the code includes the debug output trace mechanism and
8271 has a much larger code and data size. Note that these values will
8272 vary depending on the efficiency of the compiler and the compiler
8273 options used during generation.
8276 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
8277 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
8279 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
8280 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
8285 Cleaned up EC driver. Exported an external EC read/write
8286 interface. By going through this, other drivers (most notably
8287 sonypi) will be able to serialize access to the EC.
8290 3) iASL Compiler/Disassembler
8292 Implemented support to optionally generate include files for both
8293 ASM and C (the -i switch). This simplifies BIOS development by
8294 automatically creating include files that contain external
8295 declarations for the symbols that are created within the
8297 (optionally generated) ASM and C AML source files.
8300 ----------------------------------------
8301 15 November 2002. Summary of changes for version 20021115.
8303 1) ACPI CA Core Subsystem:
8305 Fixed a memory leak problem where an error during resolution of
8307 method arguments during a method invocation from another method
8308 failed to cleanup properly by deleting all successfully resolved
8311 Fixed a problem where the target of the Index() operator was not
8312 correctly constructed if the source object was a package. This
8313 problem has not been detected because the use of a target operand
8314 with Index() is very rare.
8316 Fixed a problem with the Index() operator where an attempt was
8317 made to delete the operand objects twice.
8319 Fixed a problem where an attempt was made to delete an operand
8320 twice during execution of the CondRefOf() operator if the target
8323 Implemented the first of perhaps several internal create object
8324 functions that create and initialize a specific object type. This
8325 consolidates duplicated code wherever the object is created, thus
8326 shrinking the size of the subsystem.
8328 Implemented improved debug/error messages for errors that occur
8329 during nested method invocations. All executing method pathnames
8330 are displayed (with the error) as the call stack is unwound - thus
8333 Fixed a problem introduced in the 10/02 release that caused
8334 premature deletion of a buffer object if a buffer was used as an
8335 ASL operand where an integer operand is required (Thus causing an
8336 implicit object conversion from Buffer to Integer.) The change in
8337 the 10/02 release was attempting to fix a memory leak (albeit
8340 Code and Data Size: Current core subsystem library sizes are shown
8341 below. These are the code and data sizes for the acpica.lib
8342 produced by the Microsoft Visual C++ 6.0 compiler, and these
8343 values do not include any ACPI driver or OSPM code. The debug
8344 version of the code includes the debug output trace mechanism and
8345 has a much larger code and data size. Note that these values will
8346 vary depending on the efficiency of the compiler and the compiler
8347 options used during generation.
8350 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
8351 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
8353 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
8354 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
8359 Changed the implementation of the ACPI semaphores to use down()
8360 instead of down_interruptable(). It is important that the
8361 execution of ACPI control methods not be interrupted by signals.
8362 Methods must run to completion, or the system may be left in an
8363 unknown/unstable state.
8365 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
8369 3) iASL Compiler/Disassembler
8372 Changed the default location of output files. All output files
8373 are now placed in the current directory by default instead of in
8374 the directory of the source file. This change may affect some
8375 existing makefiles, but it brings the behavior of the compiler in
8376 line with other similar tools. The location of the output files
8377 can be overridden with the -p command line switch.
8380 ----------------------------------------
8381 11 November 2002. Summary of changes for version 20021111.
8384 0) ACPI Specification 2.0B is released and is now available at:
8385 http://www.acpi.info/index.html
8388 1) ACPI CA Core Subsystem:
8390 Implemented support for the ACPI 2.0 SMBus Operation Regions.
8391 This includes the early detection and handoff of the request to
8392 the SMBus region handler (avoiding all of the complex field
8393 support code), and support for the bidirectional return packet
8394 from an SMBus write operation. This paves the way for the
8395 development of SMBus drivers in each host operating system.
8397 Fixed a problem where the semaphore WAIT_FOREVER constant was
8398 defined as 32 bits, but must be 16 bits according to the ACPI
8399 specification. This had the side effect of causing ASL
8400 Mutex/Event timeouts even though the ASL code requested a wait
8401 forever. Changed all internal references to the ACPI timeout
8402 parameter to 16 bits to prevent future problems. Changed the name
8403 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
8405 Code and Data Size: Current core subsystem library sizes are shown
8406 below. These are the code and data sizes for the acpica.lib
8407 produced by the Microsoft Visual C++ 6.0 compiler, and these
8408 values do not include any ACPI driver or OSPM code. The debug
8409 version of the code includes the debug output trace mechanism and
8410 has a much larger code and data size. Note that these values will
8411 vary depending on the efficiency of the compiler and the compiler
8412 options used during generation.
8415 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
8416 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
8418 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
8419 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
8424 Module loading/unloading fixes (John Cagle)
8427 3) iASL Compiler/Disassembler
8429 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
8431 Implemented support for the disassembly of all SMBus protocol
8432 keywords (SMBQuick, SMBWord, etc.)
8434 ----------------------------------------
8435 01 November 2002. Summary of changes for version 20021101.
8438 1) ACPI CA Core Subsystem:
8440 Fixed a problem where platforms that have a GPE1 block but no GPE0
8441 block were not handled correctly. This resulted in a "GPE
8442 overlap" error message. GPE0 is no longer required.
8444 Removed code added in the previous release that inserted nodes
8445 into the namespace in alphabetical order. This caused some side-
8446 effects on various machines. The root cause of the problem is
8447 still under investigation since in theory, the internal ordering
8448 of the namespace nodes should not matter.
8451 Enhanced error reporting for the case where a named object is not
8452 found during control method execution. The full ACPI namepath
8453 (name reference) of the object that was not found is displayed in
8456 Note: as a result of the overhaul of the namespace object types in
8457 the previous release, the namespace nodes for the predefined
8458 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
8459 instead of ACPI_TYPE_ANY. This simplifies the namespace
8460 management code but may affect code that walks the namespace tree
8461 looking for specific object types.
8463 Code and Data Size: Current core subsystem library sizes are shown
8464 below. These are the code and data sizes for the acpica.lib
8465 produced by the Microsoft Visual C++ 6.0 compiler, and these
8466 values do not include any ACPI driver or OSPM code. The debug
8467 version of the code includes the debug output trace mechanism and
8468 has a much larger code and data size. Note that these values will
8469 vary depending on the efficiency of the compiler and the compiler
8470 options used during generation.
8473 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
8474 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
8476 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
8477 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
8482 Fixed a problem introduced in the previous release where the
8483 Processor and Thermal objects were not recognized and installed in
8484 /proc. This was related to the scope type change described above.
8487 3) iASL Compiler/Disassembler
8489 Implemented the -g option to get all of the required ACPI tables
8490 from the registry and save them to files (Windows version of the
8491 compiler only.) The required tables are the FADT, FACS, and DSDT.
8493 Added ACPI table checksum validation during table disassembly in
8494 order to catch corrupted tables.
8497 ----------------------------------------
8498 22 October 2002. Summary of changes for version 20021022.
8500 1) ACPI CA Core Subsystem:
8502 Implemented a restriction on the Scope operator that the target
8503 must already exist in the namespace at the time the operator is
8504 encountered (during table load or method execution). In other
8505 words, forward references are not allowed and Scope() cannot
8506 create a new object. This changes the previous behavior where the
8507 interpreter would create the name if not found. This new behavior
8508 correctly enables the search-to-root algorithm during namespace
8509 lookup of the target name. Because of this upsearch, this fixes
8510 the known Compaq _SB_.OKEC problem and makes both the AML
8511 interpreter and iASL compiler compatible with other ACPI
8514 Completed a major overhaul of the internal ACPI object types for
8515 the ACPI Namespace and the associated operand objects. Many of
8516 these types had become obsolete with the introduction of the two-
8517 pass namespace load. This cleanup simplifies the code and makes
8518 the entire namespace load mechanism much clearer and easier to
8521 Improved debug output for tracking scope opening/closing to help
8522 diagnose scoping issues. The old scope name as well as the new
8523 scope name are displayed. Also improved error messages for
8524 problems with ASL Mutex objects and error messages for GPE
8527 Cleaned up the namespace dump code, removed obsolete code.
8529 All string output (for all namespace/object dumps) now uses the
8530 common ACPI string output procedure which handles escapes properly
8531 and does not emit non-printable characters.
8533 Fixed some issues with constants in the 64-bit version of the
8534 local C library (utclib.c)
8539 EC Driver: No longer attempts to acquire the Global Lock at
8543 3) iASL Compiler/Disassembler
8545 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
8546 2 opcodes outside of a control method. This means that the
8547 "executable" operators (versus the "namespace" operators) cannot
8548 be used at the table level; they can only be used within a control
8551 Implemented the restriction on the Scope() operator where the
8552 target must already exist in the namespace at the time the
8553 operator is encountered (during ASL compilation). In other words,
8554 forward references are not allowed and Scope() cannot create a new
8555 object. This makes the iASL compiler compatible with other ACPI
8556 implementations and makes the Scope() implementation adhere to the
8559 Fixed a problem where namepath optimization for the Alias operator
8560 was optimizing the wrong path (of the two namepaths.) This caused
8561 a "Missing alias link" error message.
8563 Fixed a problem where an "unknown reserved name" warning could be
8564 incorrectly generated for names like "_SB" when the trailing
8565 underscore is not used in the original ASL.
8567 Fixed a problem where the reserved name check did not handle
8568 NamePaths with multiple NameSegs correctly. The first nameseg of
8569 the NamePath was examined instead of the last NameSeg.
8572 ----------------------------------------
8574 02 October 2002. Summary of changes for this release.
8577 1) ACPI CA Core Subsystem version 20021002:
8579 Fixed a problem where a store/copy of a string to an existing
8580 string did not always set the string length properly in the String
8583 Fixed a reported problem with the ToString operator where the
8584 behavior was identical to the ToHexString operator instead of just
8585 simply converting a raw buffer to a string data type.
8587 Fixed a problem where CopyObject and the other "explicit"
8588 conversion operators were not updating the internal namespace node
8589 type as part of the store operation.
8591 Fixed a memory leak during implicit source operand conversion
8592 where the original object was not deleted if it was converted to a
8593 new object of a different type.
8595 Enhanced error messages for all problems associated with namespace
8596 lookups. Common procedure generates and prints the lookup name as
8597 well as the formatted status.
8599 Completed implementation of a new design for the Alias support
8600 within the namespace. The existing design did not handle the case
8601 where a new object was assigned to one of the two names due to the
8602 use of an explicit conversion operator, resulting in the two names
8603 pointing to two different objects. The new design simply points
8604 the Alias name to the original name node - not to the object.
8605 This results in a level of indirection that must be handled in the
8606 name resolution mechanism.
8608 Code and Data Size: Current core subsystem library sizes are shown
8609 below. These are the code and data sizes for the acpica.lib
8610 produced by the Microsoft Visual C++ 6.0 compiler, and these
8611 values do not include any ACPI driver or OSPM code. The debug
8612 version of the code includes the debug output trace mechanism and
8613 has a larger code and data size. Note that these values will vary
8614 depending on the efficiency of the compiler and the compiler
8615 options used during generation.
8618 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
8619 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
8621 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
8622 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
8627 Initialize thermal driver's timer before it is used. (Knut
8630 Allow handling negative celsius values. (Kochi Takayoshi)
8632 Fix thermal management and make trip points. R/W (Pavel Machek)
8634 Fix /proc/acpi/sleep. (P. Christeas)
8636 IA64 fixes. (David Mosberger)
8638 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
8640 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
8644 3) iASL Compiler/Disassembler
8646 Clarified some warning/error messages.
8649 ----------------------------------------
8650 18 September 2002. Summary of changes for this release.
8653 1) ACPI CA Core Subsystem version 20020918:
8655 Fixed a reported problem with reference chaining (via the Index()
8656 and RefOf() operators) in the ObjectType() and SizeOf() operators.
8657 The definition of these operators includes the dereferencing of
8658 all chained references to return information on the base object.
8660 Fixed a problem with stores to indexed package elements - the
8661 existing code would not complete the store if an "implicit
8662 conversion" was not performed. In other words, if the existing
8663 object (package element) was to be replaced completely, the code
8664 didn't handle this case.
8666 Relaxed typechecking on the ASL "Scope" operator to allow the
8667 target name to refer to an object of type Integer, String, or
8668 Buffer, in addition to the scoping object types (Device,
8669 predefined Scopes, Processor, PowerResource, and ThermalZone.)
8670 This allows existing AML code that has workarounds for a bug in
8671 Windows to function properly. A warning is issued, however. This
8672 affects both the AML interpreter and the iASL compiler. Below is
8673 an example of this type of ASL code:
8679 Fixed some reported problems with 64-bit integer support in the
8680 local implementation of C library functions (clib.c)
8685 Use ACPI fix map region instead of IOAPIC region, since it is
8686 undefined in non-SMP.
8688 Ensure that the SCI has the proper polarity and trigger, even on
8689 systems that do not have an interrupt override entry in the MADT.
8691 2.5 big driver reorganization (Pat Mochel)
8693 Use early table mapping code from acpitable.c (Andi Kleen)
8695 New blacklist entries (Andi Kleen)
8697 Blacklist improvements. Split blacklist code out into a separate
8698 file. Move checking the blacklist to very early. Previously, we
8699 would use ACPI tables, and then halfway through init, check the
8700 blacklist -- too late. Now, it's early enough to completely fall-
8704 3) iASL Compiler/Disassembler version 20020918:
8706 Fixed a problem where the typechecking code didn't know that an
8707 alias could point to a method. In other words, aliases were not
8708 being dereferenced during typechecking.
8711 ----------------------------------------
8712 29 August 2002. Summary of changes for this release.
8714 1) ACPI CA Core Subsystem Version 20020829:
8716 If the target of a Scope() operator already exists, it must be an
8717 object type that actually opens a scope -- such as a Device,
8718 Method, Scope, etc. This is a fatal runtime error. Similar error
8719 check has been added to the iASL compiler also.
8721 Tightened up the namespace load to disallow multiple names in the
8722 same scope. This previously was allowed if both objects were of
8723 the same type. (i.e., a lookup was the same as entering a new
8729 Ensure that the ACPI interrupt has the proper trigger and
8732 local_irq_disable is extraneous. (Matthew Wilcox)
8734 Make "acpi=off" actually do what it says, and not use the ACPI
8735 interpreter *or* the tables.
8737 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
8741 3) iASL Compiler/Disassembler Version 20020829:
8743 Implemented namepath optimization for name declarations. For
8744 example, a declaration like "Method (\_SB_.ABCD)" would get
8745 optimized to "Method (ABCD)" if the declaration is within the
8746 \_SB_ scope. This optimization is in addition to the named
8747 reference path optimization first released in the previous
8748 version. This would seem to complete all possible optimizations
8749 for namepaths within the ASL/AML.
8751 If the target of a Scope() operator already exists, it must be an
8752 object type that actually opens a scope -- such as a Device,
8755 Implemented a check and warning for unreachable code in the same
8756 block below a Return() statement.
8758 Fixed a problem where the listing file was not generated if the
8759 compiler aborted if the maximum error count was exceeded (200).
8761 Fixed a problem where the typechecking of method return values was
8762 broken. This includes the check for a return value when the
8763 method is invoked as a TermArg (a return value is expected.)
8765 Fixed a reported problem where EOF conditions during a quoted
8766 string or comment caused a fault.
8769 ----------------------------------------
8770 15 August 2002. Summary of changes for this release.
8772 1) ACPI CA Core Subsystem Version 20020815:
8774 Fixed a reported problem where a Store to a method argument that
8775 contains a reference did not perform the indirect store correctly.
8776 This problem was created during the conversion to the new
8777 reference object model - the indirect store to a method argument
8778 code was not updated to reflect the new model.
8780 Reworked the ACPI mode change code to better conform to ACPI 2.0,
8781 handle corner cases, and improve code legibility (Kochi Takayoshi)
8783 Fixed a problem with the pathname parsing for the carat (^)
8784 prefix. The heavy use of the carat operator by the new namepath
8785 optimization in the iASL compiler uncovered a problem with the AML
8786 interpreter handling of this prefix. In the case where one or
8787 more carats precede a single nameseg, the nameseg was treated as
8788 standalone and the search rule (to root) was inadvertently
8789 applied. This could cause both the iASL compiler and the
8790 interpreter to find the wrong object or to miss the error that
8791 should occur if the object does not exist at that exact pathname.
8793 Found and fixed the problem where the HP Pavilion DSDT would not
8794 load. This was a relatively minor tweak to the table loading code
8795 (a problem caused by the unexpected encounter with a method
8796 invocation not within a control method), but it does not solve the
8797 overall issue of the execution of AML code at the table level.
8798 This investigation is still ongoing.
8800 Code and Data Size: Current core subsystem library sizes are shown
8801 below. These are the code and data sizes for the acpica.lib
8802 produced by the Microsoft Visual C++ 6.0 compiler, and these
8803 values do not include any ACPI driver or OSPM code. The debug
8804 version of the code includes the debug output trace mechanism and
8805 has a larger code and data size. Note that these values will vary
8806 depending on the efficiency of the compiler and the compiler
8807 options used during generation.
8810 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
8811 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
8813 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
8814 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
8819 Remove redundant slab.h include (Brad Hards)
8821 Fix several bugs in thermal.c (Herbert Nachtnebel)
8823 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
8825 Change acpi_system_suspend to use updated irq functions (Pavel
8828 Export acpi_get_firmware_table (Matthew Wilcox)
8830 Use proper root proc entry for ACPI (Kochi Takayoshi)
8832 Fix early-boot table parsing (Bjorn Helgaas)
8835 3) iASL Compiler/Disassembler
8837 Reworked the compiler options to make them more consistent and to
8838 use two-letter options where appropriate. We were running out of
8839 sensible letters. This may break some makefiles, so check the
8840 current options list by invoking the compiler with no parameters.
8842 Completed the design and implementation of the ASL namepath
8843 optimization option for the compiler. This option optimizes all
8844 references to named objects to the shortest possible path. The
8845 first attempt tries to utilize a single nameseg (4 characters) and
8846 the "search-to-root" algorithm used by the interpreter. If that
8847 cannot be used (because either the name is not in the search path
8848 or there is a conflict with another object with the same name),
8849 the pathname is optimized using the carat prefix (usually a
8850 shorter string than specifying the entire path from the root.)
8852 Implemented support to obtain the DSDT from the Windows registry
8853 (when the disassembly option is specified with no input file).
8854 Added this code as the implementation for AcpiOsTableOverride in
8855 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
8856 utility) to scan memory for the DSDT to the AcpiOsTableOverride
8857 function in the DOS OSL to make the disassembler truly OS
8860 Implemented a new option to disassemble and compile in one step.
8861 When used without an input filename, this option will grab the
8862 DSDT from the local machine, disassemble it, and compile it in one
8865 Added a warning message for invalid escapes (a backslash followed
8866 by any character other than the allowable escapes). This catches
8867 the quoted string error "\_SB_" (which should be "\\_SB_" ).
8869 Also, there are numerous instances in the ACPI specification where
8872 Added a compiler option to disable all optimizations. This is
8873 basically the "compatibility mode" because by using this option,
8874 the AML code will come out exactly the same as other ASL
8877 Added error messages for incorrectly ordered dependent resource
8878 functions. This includes: missing EndDependentFn macro at end of
8879 dependent resource list, nested dependent function macros (both
8880 start and end), and missing StartDependentFn macro. These are
8881 common errors that should be caught at compile time.
8883 Implemented _OSI support for the disassembler and compiler. _OSI
8884 must be included in the namespace for proper disassembly (because
8885 the disassembler must know the number of arguments.)
8887 Added an "optimization" message type that is optional (off by
8888 default). This message is used for all optimizations - including
8889 constant folding, integer optimization, and namepath optimization.
8891 ----------------------------------------
8892 25 July 2002. Summary of changes for this release.
8895 1) ACPI CA Core Subsystem Version 20020725:
8897 The AML Disassembler has been enhanced to produce compilable ASL
8898 code and has been integrated into the iASL compiler (see below) as
8899 well as the single-step disassembly for the AML debugger and the
8900 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
8901 resource templates and macros are fully supported. The
8902 disassembler has been tested on over 30 different AML files,
8903 producing identical AML when the resulting disassembled ASL file
8904 is recompiled with the same ASL compiler.
8906 Modified the Resource Manager to allow zero interrupts and zero
8907 dma channels during the GetCurrentResources call. This was
8908 causing problems on some platforms.
8910 Added the AcpiOsRedirectOutput interface to the OSL to simplify
8911 output redirection for the AcpiOsPrintf and AcpiOsVprintf
8914 Code and Data Size: Current core subsystem library sizes are shown
8915 below. These are the code and data sizes for the acpica.lib
8916 produced by the Microsoft Visual C++ 6.0 compiler, and these
8917 values do not include any ACPI driver or OSPM code. The debug
8918 version of the code includes the debug output trace mechanism and
8919 has a larger code and data size. Note that these values will vary
8920 depending on the efficiency of the compiler and the compiler
8921 options used during generation.
8924 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
8925 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
8927 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
8928 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
8933 Fixed a panic in the EC driver (Dominik Brodowski)
8935 Implemented checksum of the R/XSDT itself during Linux table scan
8941 The AML disassembler is integrated into the compiler. The "-d"
8942 option invokes the disassembler to completely disassemble an
8943 input AML file, producing as output a text ASL file with the
8944 extension ".dsl" (to avoid name collisions with existing .asl
8945 source files.) A future enhancement will allow the disassembler
8946 to obtain the BIOS DSDT from the registry under Windows.
8948 Fixed a problem with the VendorShort and VendorLong resource
8949 descriptors where an invalid AML sequence was created.
8951 Implemented a fix for BufferData term in the ASL parser. It was
8952 inadvertently defined twice, allowing invalid syntax to pass and
8953 causing reduction conflicts.
8955 Fixed a problem where the Ones opcode could get converted to a
8956 value of zero if "Ones" was used where a byte, word or dword value
8957 was expected. The 64-bit value is now truncated to the correct
8958 size with the correct value.
8962 ----------------------------------------
8963 02 July 2002. Summary of changes for this release.
8966 1) ACPI CA Core Subsystem Version 20020702:
8968 The Table Manager code has been restructured to add several new
8969 features. Tables that are not required by the core subsystem
8970 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
8971 validated in any way and are returned from AcpiGetFirmwareTable if
8972 requested. The AcpiOsTableOverride interface is now called for
8973 each table that is loaded by the subsystem in order to allow the
8974 host to override any table it chooses. Previously, only the DSDT
8975 could be overridden. Added one new files, tbrsdt.c and
8978 Fixed a problem with the conversion of internal package objects to
8979 external objects (when a package is returned from a control
8980 method.) The return buffer length was set to zero instead of the
8981 proper length of the package object.
8983 Fixed a reported problem with the use of the RefOf and DeRefOf
8984 operators when passing reference arguments to control methods. A
8985 new type of Reference object is used internally for references
8986 produced by the RefOf operator.
8988 Added additional error messages in the Resource Manager to explain
8989 AE_BAD_DATA errors when they occur during resource parsing.
8991 Split the AcpiEnableSubsystem into two primitives to enable a
8992 finer granularity initialization sequence. These two calls should
8993 be called in this order: AcpiEnableSubsystem (flags),
8994 AcpiInitializeObjects (flags). The flags parameter remains the
9000 Updated the ACPI utilities module to understand the new style of
9001 fully resolved package objects that are now returned from the core
9002 subsystem. This eliminates errors of the form:
9004 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
9005 acpi_utils-0430 [145] acpi_evaluate_reference:
9006 Invalid element in package (not a device reference)
9008 The method evaluation utility uses the new buffer allocation
9009 scheme instead of calling AcpiEvaluate Object twice.
9011 Added support for ECDT. This allows the use of the Embedded
9013 Controller before the namespace has been fully initialized, which
9014 is necessary for ACPI 2.0 support, and for some laptops to
9015 initialize properly. (Laptops using ECDT are still rare, so only
9016 limited testing was performed of the added functionality.)
9018 Fixed memory leaks in the EC driver.
9020 Eliminated a brittle code structure in acpi_bus_init().
9022 Eliminated the acpi_evaluate() helper function in utils.c. It is
9023 no longer needed since acpi_evaluate_object can optionally
9024 allocate memory for the return object.
9026 Implemented fix for keyboard hang when getting battery readings on
9027 some systems (Stephen White)
9029 PCI IRQ routing update (Dominik Brodowski)
9031 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
9034 ----------------------------------------
9035 11 June 2002. Summary of changes for this release.
9038 1) ACPI CA Core Subsystem Version 20020611:
9040 Fixed a reported problem where constants such as Zero and One
9041 appearing within _PRT packages were not handled correctly within
9042 the resource manager code. Originally reported against the ASL
9043 compiler because the code generator now optimizes integers to
9044 their minimal AML representation (i.e. AML constants if possible.)
9045 The _PRT code now handles all AML constant opcodes correctly
9046 (Zero, One, Ones, Revision).
9048 Fixed a problem with the Concatenate operator in the AML
9049 interpreter where a buffer result object was incorrectly marked as
9050 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
9052 All package sub-objects are now fully resolved before they are
9053 returned from the external ACPI interfaces. This means that name
9054 strings are resolved to object handles, and constant operators
9055 (Zero, One, Ones, Revision) are resolved to Integers.
9057 Implemented immediate resolution of the AML Constant opcodes
9058 (Zero, One, Ones, Revision) to Integer objects upon detection
9059 within the AML stream. This has simplified and reduced the
9060 generated code size of the subsystem by eliminating about 10
9061 switch statements for these constants (which previously were
9062 contained in Reference objects.) The complicating issues are that
9063 the Zero opcode is used as a "placeholder" for unspecified
9064 optional target operands and stores to constants are defined to be
9067 Code and Data Size: Current core subsystem library sizes are shown
9068 below. These are the code and data sizes for the acpica.lib
9069 produced by the Microsoft Visual C++ 6.0 compiler, and these
9070 values do not include any ACPI driver or OSPM code. The debug
9071 version of the code includes the debug output trace mechanism and
9072 has a larger code and data size. Note that these values will vary
9073 depending on the efficiency of the compiler and the compiler
9074 options used during generation.
9077 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
9078 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
9080 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
9081 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
9087 Added preliminary support for obtaining _TRA data for PCI root
9088 bridges (Bjorn Helgaas).
9091 3) iASL Compiler Version X2046:
9093 Fixed a problem where the "_DDN" reserved name was defined to be a
9094 control method with one argument. There are no arguments, and
9095 _DDN does not have to be a control method.
9097 Fixed a problem with the Linux version of the compiler where the
9098 source lines printed with error messages were the wrong lines.
9099 This turned out to be the "LF versus CR/LF" difference between
9100 Windows and Unix. This appears to be the longstanding issue
9101 concerning listing output and error messages.
9103 Fixed a problem with the Linux version of compiler where opcode
9104 names within error messages were wrong. This was caused by a
9105 slight difference in the output of the Flex tool on Linux versus
9108 Fixed a problem with the Linux compiler where the hex output files
9109 contained some garbage data caused by an internal buffer overrun.
9112 ----------------------------------------
9113 17 May 2002. Summary of changes for this release.
9116 1) ACPI CA Core Subsystem Version 20020517:
9118 Implemented a workaround to an BIOS bug discovered on the HP
9119 OmniBook where the FADT revision number and the table size are
9120 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
9121 behavior is to fallback to using only the ACPI 1.0 fields of the
9122 FADT if the table is too small to be a ACPI 2.0 table as claimed
9123 by the revision number. Although this is a BIOS bug, this is a
9124 case where the workaround is simple enough and with no side
9125 effects, so it seemed prudent to add it. A warning message is
9128 Implemented minimum size checks for the fixed-length ACPI tables -
9129 - the FADT and FACS, as well as consistency checks between the
9130 revision number and the table size.
9132 Fixed a reported problem in the table override support where the
9133 new table pointer was incorrectly treated as a physical address
9134 instead of a logical address.
9136 Eliminated the use of the AE_AML_ERROR exception and replaced it
9137 with more descriptive codes.
9139 Fixed a problem where an exception would occur if an ASL Field was
9140 defined with no named Field Units underneath it (used by some
9143 Code and Data Size: Current core subsystem library sizes are shown
9144 below. These are the code and data sizes for the acpica.lib
9145 produced by the Microsoft Visual C++ 6.0 compiler, and these
9146 values do not include any ACPI driver or OSPM code. The debug
9147 version of the code includes the debug output trace mechanism and
9148 has a larger code and data size. Note that these values will vary
9149 depending on the efficiency of the compiler and the compiler
9150 options used during generation.
9153 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
9154 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
9156 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
9157 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
9163 Much work done on ACPI init (MADT and PCI IRQ routing support).
9164 (Paul D. and Dominik Brodowski)
9166 Fix PCI IRQ-related panic on boot (Sam Revitch)
9168 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
9170 Fix "MHz" typo (Dominik Brodowski)
9172 Fix RTC year 2000 issue (Dominik Brodowski)
9174 Preclude multiple button proc entries (Eric Brunet)
9176 Moved arch-specific code out of include/platform/aclinux.h
9178 3) iASL Compiler Version X2044:
9180 Implemented error checking for the string used in the EISAID macro
9181 (Usually used in the definition of the _HID object.) The code now
9182 strictly enforces the PnP format - exactly 7 characters, 3
9183 uppercase letters and 4 hex digits.
9185 If a raw string is used in the definition of the _HID object
9186 (instead of the EISAID macro), the string must contain all
9187 alphanumeric characters (e.g., "*PNP0011" is not allowed because
9190 Implemented checking for invalid use of ACPI reserved names for
9191 most of the name creation operators (Name, Device, Event, Mutex,
9192 OperationRegion, PowerResource, Processor, and ThermalZone.)
9193 Previously, this check was only performed for control methods.
9195 Implemented an additional check on the Name operator to emit an
9196 error if a reserved name that must be implemented in ASL as a
9197 control method is used. We know that a reserved name must be a
9198 method if it is defined with input arguments.
9200 The warning emitted when a namespace object reference is not found
9201 during the cross reference phase has been changed into an error.
9202 The "External" directive should be used for names defined in other
9206 4) Tools and Utilities
9208 The 16-bit tools (adump16 and aexec16) have been regenerated and
9211 Fixed a problem with the output of both acpidump and adump16 where
9212 the indentation of closing parentheses and brackets was not
9214 aligned properly with the parent block.
9217 ----------------------------------------
9218 03 May 2002. Summary of changes for this release.
9221 1) ACPI CA Core Subsystem Version 20020503:
9223 Added support a new OSL interface that allows the host operating
9225 system software to override the DSDT found in the firmware -
9226 AcpiOsTableOverride. With this interface, the OSL can examine the
9227 version of the firmware DSDT and replace it with a different one
9230 Added new external interfaces for accessing ACPI registers from
9231 device drivers and other system software - AcpiGetRegister and
9232 AcpiSetRegister. This was simply an externalization of the
9233 existing AcpiHwBitRegister interfaces.
9235 Fixed a regression introduced in the previous build where the
9236 ASL/AML CreateField operator always returned an error,
9237 "destination must be a NS Node".
9239 Extended the maximum time (before failure) to successfully enable
9240 ACPI mode to 3 seconds.
9242 Code and Data Size: Current core subsystem library sizes are shown
9243 below. These are the code and data sizes for the acpica.lib
9244 produced by the Microsoft Visual C++ 6.0 compiler, and these
9245 values do not include any ACPI driver or OSPM code. The debug
9246 version of the code includes the debug output trace mechanism and
9247 has a larger code and data size. Note that these values will vary
9248 depending on the efficiency of the compiler and the compiler
9249 options used during generation.
9252 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
9253 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
9255 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
9256 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
9261 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
9262 free. While 3 out of 4 of our in-house systems work fine, the last
9263 one still hangs when testing the LAPIC timer.
9265 Renamed many files in 2.5 kernel release to omit "acpi_" from the
9268 Added warning on boot for Presario 711FR.
9270 Sleep improvements (Pavel Machek)
9272 ACPI can now be built without CONFIG_PCI enabled.
9274 IA64: Fixed memory map functions (JI Lee)
9277 3) iASL Compiler Version X2043:
9279 Added support to allow the compiler to be integrated into the MS
9280 VC++ development environment for one-button compilation of single
9281 files or entire projects -- with error-to-source-line mapping.
9283 Implemented support for compile-time constant folding for the
9284 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
9285 specification. This allows the ASL writer to use expressions
9286 instead of Integer/Buffer/String constants in terms that must
9287 evaluate to constants at compile time and will also simplify the
9288 emitted AML in any such sub-expressions that can be folded
9289 (evaluated at compile-time.) This increases the size of the
9290 compiler significantly because a portion of the ACPI CA AML
9291 interpreter is included within the compiler in order to pre-
9292 evaluate constant expressions.
9295 Fixed a problem with the "Unicode" ASL macro that caused the
9296 compiler to fault. (This macro is used in conjunction with the
9297 _STR reserved name.)
9299 Implemented an AML opcode optimization to use the Zero, One, and
9300 Ones opcodes where possible to further reduce the size of integer
9301 constants and thus reduce the overall size of the generated AML
9304 Implemented error checking for new reserved terms for ACPI version
9307 Implemented the -qr option to display the current list of ACPI
9308 reserved names known to the compiler.
9310 Implemented the -qc option to display the current list of ASL
9311 operators that are allowed within constant expressions and can
9312 therefore be folded at compile time if the operands are constants.
9317 Updated the Programmer's Reference for new interfaces, data types,
9318 and memory allocation model options.
9320 Updated the iASL Compiler User Reference to apply new format and
9321 add information about new features and options.
9323 ----------------------------------------
9324 19 April 2002. Summary of changes for this release.
9326 1) ACPI CA Core Subsystem Version 20020419:
9328 The source code base for the Core Subsystem has been completely
9329 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
9330 versions. The Lint option files used are included in the
9331 /acpi/generate/lint directory.
9333 Implemented enhanced status/error checking across the entire
9334 Hardware manager subsystem. Any hardware errors (reported from
9335 the OSL) are now bubbled up and will abort a running control
9339 Fixed a problem where the per-ACPI-table integer width (32 or 64)
9340 was stored only with control method nodes, causing a fault when
9341 non-control method code was executed during table loading. The
9342 solution implemented uses a global variable to indicate table
9343 width across the entire ACPI subsystem. Therefore, ACPI CA does
9344 not support mixed integer widths across different ACPI tables
9347 Fixed a problem where NULL extended fields (X fields) in an ACPI
9348 2.0 ACPI FADT caused the table load to fail. Although the
9349 existing ACPI specification is a bit fuzzy on this topic, the new
9350 behavior is to fall back on a ACPI 1.0 field if the corresponding
9351 ACPI 2.0 X field is zero (even though the table revision indicates
9352 a full ACPI 2.0 table.) The ACPI specification will be updated to
9355 Fixed a problem with the SystemMemory operation region handler
9356 where memory was always accessed byte-wise even if the AML-
9357 specified access width was larger than a byte. This caused
9358 problems on systems with memory-mapped I/O. Memory is now
9359 accessed with the width specified. On systems that do not support
9360 non-aligned transfers, a check is made to guarantee proper address
9361 alignment before proceeding in order to avoid an AML-caused
9362 alignment fault within the kernel.
9365 Fixed a problem with the ExtendedIrq resource where only one byte
9366 of the 4-byte Irq field was extracted.
9368 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
9369 function was out of date and required a rewrite.
9371 Code and Data Size: Current core subsystem library sizes are shown
9372 below. These are the code and data sizes for the acpica.lib
9373 produced by the Microsoft Visual C++ 6.0 compiler, and these
9374 values do not include any ACPI driver or OSPM code. The debug
9375 version of the code includes the debug output trace mechanism and
9376 has a larger code and data size. Note that these values will vary
9377 depending on the efficiency of the compiler and the compiler
9378 options used during generation.
9381 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
9382 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
9384 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
9385 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
9390 PCI IRQ routing fixes (Dominik Brodowski)
9393 3) iASL Compiler Version X2042:
9395 Implemented an additional compile-time error check for a field
9396 unit whose size + minimum access width would cause a run-time
9397 access beyond the end-of-region. Previously, only the field size
9400 The Core subsystem and iASL compiler now share a common parse
9401 object in preparation for compile-time evaluation of the type
9402 3/4/5 ASL operators.
9405 ----------------------------------------
9406 Summary of changes for this release: 03_29_02
9408 1) ACPI CA Core Subsystem Version 20020329:
9410 Implemented support for late evaluation of TermArg operands to
9411 Buffer and Package objects. This allows complex expressions to be
9412 used in the declarations of these object types.
9414 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
9415 1.0, if the field was larger than 32 bits, it was returned as a
9416 buffer - otherwise it was returned as an integer. In ACPI 2.0,
9417 the field is returned as a buffer only if the field is larger than
9418 64 bits. The TableRevision is now considered when making this
9419 conversion to avoid incompatibility with existing ASL code.
9421 Implemented logical addressing for AcpiOsGetRootPointer. This
9422 allows an RSDP with either a logical or physical address. With
9423 this support, the host OS can now override all ACPI tables with
9424 one logical RSDP. Includes implementation of "typed" pointer
9425 support to allow a common data type for both physical and logical
9426 pointers internally. This required a change to the
9427 AcpiOsGetRootPointer interface.
9429 Implemented the use of ACPI 2.0 Generic Address Structures for all
9430 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
9431 mapped I/O for these ACPI features.
9433 Initialization now ignores not only non-required tables (All
9434 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
9435 not validate the table headers of unrecognized tables.
9437 Fixed a problem where a notify handler could only be
9438 installed/removed on an object of type Device. All "notify"
9440 objects are now supported -- Devices, Processor, Power, and
9443 Removed most verbosity from the ACPI_DB_INFO debug level. Only
9444 critical information is returned when this debug level is enabled.
9446 Code and Data Size: Current core subsystem library sizes are shown
9447 below. These are the code and data sizes for the acpica.lib
9448 produced by the Microsoft Visual C++ 6.0 compiler, and these
9449 values do not include any ACPI driver or OSPM code. The debug
9450 version of the code includes the debug output trace mechanism and
9451 has a larger code and data size. Note that these values will vary
9452 depending on the efficiency of the compiler and the compiler
9453 options used during generation.
9456 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
9457 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
9459 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
9460 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
9465 The processor driver (acpi_processor.c) now fully supports ACPI
9466 2.0-based processor performance control (e.g. Intel(R)
9467 SpeedStep(TM) technology) Note that older laptops that only have
9468 the Intel "applet" interface are not supported through this. The
9469 'limit' and 'performance' interface (/proc) are fully functional.
9470 [Note that basic policy for controlling performance state
9471 transitions will be included in the next version of ospmd.] The
9472 idle handler was modified to more aggressively use C2, and PIIX4
9473 errata handling underwent a complete overhaul (big thanks to
9476 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
9477 based devices in the ACPI namespace are now dynamically bound
9478 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
9479 This allows, among other things, ACPI to resolve bus numbers for
9480 subordinate PCI bridges.
9482 Enhanced PCI IRQ routing to get the proper bus number for _PRT
9483 entries defined underneath PCI bridges.
9485 Added IBM 600E to bad bios list due to invalid _ADR value for
9486 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
9488 In the process of adding full MADT support (e.g. IOAPIC) for IA32
9489 (acpi.c, mpparse.c) -- stay tuned.
9491 Added back visual differentiation between fixed-feature and
9492 control-method buttons in dmesg. Buttons are also subtyped (e.g.
9493 button/power/PWRF) to simplify button identification.
9495 We no longer use -Wno-unused when compiling debug. Please ignore
9496 any "_THIS_MODULE defined but not used" messages.
9498 Can now shut down the system using "magic sysrq" key.
9501 3) iASL Compiler version 2041:
9503 Fixed a problem where conversion errors for hex/octal/decimal
9504 constants were not reported.
9506 Implemented a fix for the General Register template Address field.
9507 This field was 8 bits when it should be 64.
9509 Fixed a problem where errors/warnings were no longer being emitted
9510 within the listing output file.
9512 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
9513 exactly 4 characters, alphanumeric only.
9518 ----------------------------------------
9519 Summary of changes for this release: 03_08_02
9522 1) ACPI CA Core Subsystem Version 20020308:
9524 Fixed a problem with AML Fields where the use of the "AccessAny"
9525 keyword could cause an interpreter error due to attempting to read
9526 or write beyond the end of the parent Operation Region.
9528 Fixed a problem in the SystemMemory Operation Region handler where
9529 an attempt was made to map memory beyond the end of the region.
9530 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
9531 errors on some Linux systems.
9533 Fixed a problem where the interpreter/namespace "search to root"
9534 algorithm was not functioning for some object types. Relaxed the
9535 internal restriction on the search to allow upsearches for all
9536 external object types as well as most internal types.
9541 We now use safe_halt() macro versus individual calls to sti | hlt.
9543 Writing to the processor limit interface should now work. "echo 1"
9544 will increase the limit, 2 will decrease, and 0 will reset to the
9551 Fixed segfault on Linux version.
9554 ----------------------------------------
9555 Summary of changes for this release: 02_25_02
9557 1) ACPI CA Core Subsystem:
9560 Fixed a problem where the GPE bit masks were not initialized
9561 properly, causing erratic GPE behavior.
9563 Implemented limited support for multiple calling conventions. The
9564 code can be generated with either the VPL (variable parameter
9565 list, or "C") convention, or the FPL (fixed parameter list, or
9566 "Pascal") convention. The core subsystem is about 3.4% smaller
9567 when generated with FPL.
9572 Re-add some /proc/acpi/event functionality that was lost during
9575 Resolved issue with /proc events for fixed-feature buttons showing
9576 up as the system device.
9578 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
9580 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
9582 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
9584 Fixed limit interface & usage to fix bugs with passive cooling
9587 Restructured PRT support.
9590 ----------------------------------------
9591 Summary of changes for this label: 02_14_02
9594 1) ACPI CA Core Subsystem:
9596 Implemented support in AcpiLoadTable to allow loading of FACS and
9599 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
9600 been removed. All 64-bit platforms should be migrated to the ACPI
9601 2.0 tables. The actbl71.h header has been removed from the source
9604 All C macros defined within the subsystem have been prefixed with
9605 "ACPI_" to avoid collision with other system include files.
9607 Removed the return value for the two AcpiOsPrint interfaces, since
9608 it is never used and causes lint warnings for ignoring the return
9611 Added error checking to all internal mutex acquire and release
9612 calls. Although a failure from one of these interfaces is
9613 probably a fatal system error, these checks will cause the
9614 immediate abort of the currently executing method or interface.
9616 Fixed a problem where the AcpiSetCurrentResources interface could
9617 fault. This was a side effect of the deployment of the new memory
9620 Fixed a couple of problems with the Global Lock support introduced
9621 in the last major build. The "common" (1.0/2.0) internal FACS was
9622 being overwritten with the FACS signature and clobbering the
9623 Global Lock pointer. Also, the actual firmware FACS was being
9624 unmapped after construction of the "common" FACS, preventing
9625 access to the actual Global Lock field within it. The "common"
9626 internal FACS is no longer installed as an actual ACPI table; it
9627 is used simply as a global.
9629 Code and Data Size: Current core subsystem library sizes are shown
9630 below. These are the code and data sizes for the acpica.lib
9631 produced by the Microsoft Visual C++ 6.0 compiler, and these
9632 values do not include any ACPI driver or OSPM code. The debug
9633 version of the code includes the debug output trace mechanism and
9634 has a larger code and data size. Note that these values will vary
9635 depending on the efficiency of the compiler and the compiler
9636 options used during generation.
9638 Previous Release (02_07_01)
9639 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
9640 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
9642 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
9643 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
9648 Updated Linux-specific code for core macro and OSL interface
9649 changes described above.
9651 Improved /proc/acpi/event. It now can be opened only once and has
9652 proper poll functionality.
9654 Fixed and restructured power management (acpi_bus).
9656 Only create /proc "view by type" when devices of that class exist.
9658 Fixed "charging/discharging" bug (and others) in acpi_battery.
9660 Improved thermal zone code.
9663 3) ASL Compiler, version X2039:
9666 Implemented the new compiler restriction on ASL String hex/octal
9667 escapes to non-null, ASCII values. An error results if an invalid
9668 value is used. (This will require an ACPI 2.0 specification
9671 AML object labels that are output to the optional C and ASM source
9672 are now prefixed with both the ACPI table signature and table ID
9673 to help guarantee uniqueness within a large BIOS project.
9676 ----------------------------------------
9677 Summary of changes for this label: 02_01_02
9679 1) ACPI CA Core Subsystem:
9681 ACPI 2.0 support is complete in the entire Core Subsystem and the
9682 ASL compiler. All new ACPI 2.0 operators are implemented and all
9683 other changes for ACPI 2.0 support are complete. With
9684 simultaneous code and data optimizations throughout the subsystem,
9685 ACPI 2.0 support has been implemented with almost no additional
9686 cost in terms of code and data size.
9688 Implemented a new mechanism for allocation of return buffers. If
9689 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
9690 be allocated on behalf of the caller. Consolidated all return
9691 buffer validation and allocation to a common procedure. Return
9692 buffers will be allocated via the primary OSL allocation interface
9693 since it appears that a separate pool is not needed by most users.
9694 If a separate pool is required for these buffers, the caller can
9695 still use the original mechanism and pre-allocate the buffer(s).
9697 Implemented support for string operands within the DerefOf
9700 Restructured the Hardware and Event managers to be table driven,
9701 simplifying the source code and reducing the amount of generated
9704 Split the common read/write low-level ACPI register bitfield
9705 procedure into a separate read and write, simplifying the code
9708 Obsoleted the AcpiOsCallocate OSL interface. This interface was
9709 used only a handful of times and didn't have enough critical mass
9710 for a separate interface. Replaced with a common calloc procedure
9713 Fixed a reported problem with the GPE number mapping mechanism
9714 that allows GPE1 numbers to be non-contiguous with GPE0.
9715 Reorganized the GPE information and shrunk a large array that was
9716 originally large enough to hold info for all possible GPEs (256)
9717 to simply large enough to hold all GPEs up to the largest GPE
9718 number on the machine.
9720 Fixed a reported problem with resource structure alignment on 64-
9723 Changed the AcpiEnableEvent and AcpiDisableEvent external
9724 interfaces to not require any flags for the common case of
9725 enabling/disabling a GPE.
9727 Implemented support to allow a "Notify" on a Processor object.
9729 Most TBDs in comments within the source code have been resolved
9733 Fixed a problem in the interpreter where a standalone parent
9734 prefix (^) was not handled correctly in the interpreter and
9737 Removed obsolete and unnecessary GPE save/restore code.
9739 Implemented Field support in the ASL Load operator. This allows a
9740 table to be loaded from a named field, in addition to loading a
9741 table directly from an Operation Region.
9743 Implemented timeout and handle support in the external Global Lock
9746 Fixed a problem in the AcpiDump utility where pathnames were no
9747 longer being generated correctly during the dump of named objects.
9749 Modified the AML debugger to give a full display of if/while
9750 predicates instead of just one AML opcode at a time. (The
9751 predicate can have several nested ASL statements.) The old method
9752 was confusing during single stepping.
9754 Code and Data Size: Current core subsystem library sizes are shown
9755 below. These are the code and data sizes for the acpica.lib
9756 produced by the Microsoft Visual C++ 6.0 compiler, and these
9757 values do not include any ACPI driver or OSPM code. The debug
9758 version of the code includes the debug output trace mechanism and
9759 has a larger code and data size. Note that these values will vary
9760 depending on the efficiency of the compiler and the compiler
9761 options used during generation.
9763 Previous Release (12_18_01)
9764 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
9765 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
9767 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
9768 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
9772 Implemented fix for PIIX reverse throttling errata (Processor
9775 Added new Limit interface (Processor and Thermal drivers)
9777 New thermal policy (Thermal driver)
9779 Many updates to /proc
9781 Battery "low" event support (Battery driver)
9783 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
9785 IA32 - IA64 initialization unification, no longer experimental
9787 Menuconfig options redesigned
9789 3) ASL Compiler, version X2037:
9791 Implemented several new output features to simplify integration of
9792 AML code into firmware: 1) Output the AML in C source code with
9793 labels for each named ASL object. The original ASL source code
9794 is interleaved as C comments. 2) Output the AML in ASM source code
9795 with labels and interleaved ASL source. 3) Output the AML in
9796 raw hex table form, in either C or ASM.
9798 Implemented support for optional string parameters to the
9801 Completed support for embedded escape sequences within string
9802 literals. The compiler now supports all single character escapes
9803 as well as the Octal and Hex escapes. Note: the insertion of a
9804 null byte into a string literal (via the hex/octal escape) causes
9805 the string to be immediately terminated. A warning is issued.
9807 Fixed a problem where incorrect AML was generated for the case
9808 where an ASL namepath consists of a single parent prefix (
9810 ) with no trailing name segments.
9812 The compiler has been successfully generated with a 64-bit C
9818 ----------------------------------------
9819 Summary of changes for this label: 12_18_01
9823 Enhanced blacklist with reason and severity fields. Any table's
9824 signature may now be used to identify a blacklisted system.
9826 Call _PIC control method to inform the firmware which interrupt
9827 model the OS is using. Turn on any disabled link devices.
9829 Cleaned up busmgr /proc error handling (Andreas Dilger)
9831 2) ACPI CA Core Subsystem:
9833 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
9836 Completed implementation of the ACPI 2.0 "Continue",
9837 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
9838 operators. All new ACPI 2.0 operators are now implemented in both
9839 the ASL compiler and the AML interpreter. The only remaining ACPI
9840 2.0 task is support for the String data type in the DerefOf
9841 operator. Fixed a problem with AcquireMutex where the status code
9842 was lost if the caller had to actually wait for the mutex.
9844 Increased the maximum ASL Field size from 64K bits to 4G bits.
9846 Completed implementation of the external Global Lock interfaces --
9847 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
9848 Handler parameters were added.
9850 Completed another pass at removing warnings and issues when
9851 compiling with 64-bit compilers. The code now compiles cleanly
9852 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
9853 add and subtract (diff) macros have changed considerably.
9856 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
9857 64-bit platforms, 32-bits on all others. This type is used
9858 wherever memory allocation and/or the C sizeof() operator is used,
9859 and affects the OSL memory allocation interfaces AcpiOsAllocate
9860 and AcpiOsCallocate.
9862 Implemented sticky user breakpoints in the AML debugger.
9864 Code and Data Size: Current core subsystem library sizes are shown
9865 below. These are the code and data sizes for the acpica.lib
9866 produced by the Microsoft Visual C++ 6.0 compiler, and these
9867 values do not include any ACPI driver or OSPM code. The debug
9868 version of the code includes the debug output trace mechanism and
9869 has a larger code and data size. Note that these values will vary
9870 depending on the efficiency of the compiler and the compiler
9871 options used during generation.
9873 Previous Release (12_05_01)
9874 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
9875 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
9877 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
9878 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
9880 3) ASL Compiler, version X2034:
9882 Now checks for (and generates an error if detected) the use of a
9883 Break or Continue statement without an enclosing While statement.
9886 Successfully generated the compiler with the Intel 64-bit C
9889 ----------------------------------------
9890 Summary of changes for this label: 12_05_01
9892 1) ACPI CA Core Subsystem:
9894 The ACPI 2.0 CopyObject operator is fully implemented. This
9895 operator creates a new copy of an object (and is also used to
9896 bypass the "implicit conversion" mechanism of the Store operator.)
9898 The ACPI 2.0 semantics for the SizeOf operator are fully
9899 implemented. The change is that performing a SizeOf on a
9900 reference object causes an automatic dereference of the object to
9901 tha actual value before the size is evaluated. This behavior was
9902 undefined in ACPI 1.0.
9904 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
9905 have been implemented. The interrupt polarity and mode are now
9908 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
9909 appearing in Package objects were not properly converted to
9910 integers when the internal Package was converted to an external
9911 object (via the AcpiEvaluateObject interface.)
9913 Fixed a problem with the namespace object deletion mechanism for
9914 objects created by control methods. There were two parts to this
9915 problem: 1) Objects created during the initialization phase method
9916 parse were not being deleted, and 2) The object owner ID mechanism
9917 to track objects was broken.
9919 Fixed a problem where the use of the ASL Scope operator within a
9920 control method would result in an invalid opcode exception.
9922 Fixed a problem introduced in the previous label where the buffer
9923 length required for the _PRT structure was not being returned
9926 Code and Data Size: Current core subsystem library sizes are shown
9927 below. These are the code and data sizes for the acpica.lib
9928 produced by the Microsoft Visual C++ 6.0 compiler, and these
9929 values do not include any ACPI driver or OSPM code. The debug
9930 version of the code includes the debug output trace mechanism and
9931 has a larger code and data size. Note that these values will vary
9932 depending on the efficiency of the compiler and the compiler
9933 options used during generation.
9935 Previous Release (11_20_01)
9936 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
9937 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
9940 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
9941 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
9945 Updated all files to apply cleanly against 2.4.16.
9947 Added basic PCI Interrupt Routing Table (PRT) support for IA32
9948 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
9949 version supports both static and dyanmic PRT entries, but dynamic
9950 entries are treated as if they were static (not yet
9951 reconfigurable). Architecture- specific code to use this data is
9952 absent on IA32 but should be available shortly.
9954 Changed the initialization sequence to start the ACPI interpreter
9955 (acpi_init) prior to initialization of the PCI driver (pci_init)
9956 in init/main.c. This ordering is required to support PRT and
9957 facilitate other (future) enhancement. A side effect is that the
9958 ACPI bus driver and certain device drivers can no longer be loaded
9961 Modified the 'make menuconfig' options to allow PCI Interrupt
9962 Routing support to be included without the ACPI Bus and other
9965 3) ASL Compiler, version X2033:
9967 Fixed some issues with the use of the new CopyObject and
9968 DataTableRegion operators. Both are fully functional.
9970 ----------------------------------------
9971 Summary of changes for this label: 11_20_01
9973 20 November 2001. Summary of changes for this release.
9975 1) ACPI CA Core Subsystem:
9977 Updated Index support to match ACPI 2.0 semantics. Storing a
9978 Integer, String, or Buffer to an Index of a Buffer will store only
9979 the least-significant byte of the source to the Indexed buffer
9980 byte. Multiple writes are not performed.
9982 Fixed a problem where the access type used in an AccessAs ASL
9983 operator was not recorded correctly into the field object.
9985 Fixed a problem where ASL Event objects were created in a
9986 signalled state. Events are now created in an unsignalled state.
9988 The internal object cache is now purged after table loading and
9989 initialization to reduce the use of dynamic kernel memory -- on
9990 the assumption that object use is greatest during the parse phase
9991 of the entire table (versus the run-time use of individual control
9994 ACPI 2.0 variable-length packages are now fully operational.
9996 Code and Data Size: Code and Data optimizations have permitted new
9997 feature development with an actual reduction in the library size.
9998 Current core subsystem library sizes are shown below. These are
9999 the code and data sizes for the acpica.lib produced by the
10000 Microsoft Visual C++ 6.0 compiler, and these values do not include
10001 any ACPI driver or OSPM code. The debug version of the code
10002 includes the debug output trace mechanism and has a larger code
10003 and data size. Note that these values will vary depending on the
10004 efficiency of the compiler and the compiler options used during
10007 Previous Release (11_09_01):
10008 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
10009 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
10012 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
10013 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
10017 Enhanced the ACPI boot-time initialization code to allow the use
10018 of Local APIC tables for processor enumeration on IA-32, and to
10019 pave the way for a fully MPS-free boot (on SMP systems) in the
10020 near future. This functionality replaces
10021 arch/i386/kernel/acpitables.c, which was introduced in an earlier
10022 2.4.15-preX release. To enable this feature you must add
10023 "acpi_boot=on" to the kernel command line -- see the help entry
10024 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
10027 Restructured the configuration options to allow boot-time table
10028 parsing support without inclusion of the ACPI Interpreter (and
10031 NOTE: This release does not include fixes for the reported events,
10032 power-down, and thermal passive cooling issues (coming soon).
10036 Added additional typechecking for Fields within restricted access
10037 Operation Regions. All fields within EC and CMOS regions must be
10038 declared with ByteAcc. All fields withing SMBus regions must be
10039 declared with the BufferAcc access type.
10041 Fixed a problem where the listing file output of control methods
10042 no longer interleaved the actual AML code with the ASL source
10048 ----------------------------------------
10049 Summary of changes for this label: 11_09_01
10051 1) ACPI CA Core Subsystem:
10053 Implemented ACPI 2.0-defined support for writes to fields with a
10054 Buffer, String, or Integer source operand that is smaller than the
10055 target field. In these cases, the source operand is zero-extended
10056 to fill the target field.
10058 Fixed a problem where a Field starting bit offset (within the
10059 parent operation region) was calculated incorrectly if the
10061 alignment of the field differed from the access width. This
10062 affected CreateWordField, CreateDwordField, CreateQwordField, and
10063 possibly other fields that use the "AccessAny" keyword.
10065 Fixed a problem introduced in the 11_02_01 release where indirect
10066 stores through method arguments did not operate correctly.
10070 Implemented boot-time ACPI table parsing support
10071 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
10072 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
10073 legacy BIOS interfaces (e.g. MPS) for the configuration of system
10074 processors, memory, and interrupts during setup_arch(). Note that
10075 this patch does not include the required architecture-specific
10076 changes required to apply this information -- subsequent patches
10077 will be posted for both IA32 and IA64 to achieve this.
10079 Added low-level sleep support for IA32 platforms, courtesy of Pat
10080 Mochel. This allows IA32 systems to transition to/from various
10081 sleeping states (e.g. S1, S3), although the lack of a centralized
10082 driver model and power-manageable drivers will prevent its
10083 (successful) use on most systems.
10085 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
10086 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
10087 tables" option, etc.
10089 Increased the default timeout for the EC driver from 1ms to 10ms
10090 (1000 cycles of 10us) to try to address AE_TIME errors during EC
10093 ----------------------------------------
10094 Summary of changes for this label: 11_02_01
10096 1) ACPI CA Core Subsystem:
10098 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
10099 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
10102 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
10103 changes to support ACPI 2.0 Qword field access. Read/Write
10104 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
10105 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
10106 the value parameter for the address space handler interface is now
10107 an ACPI_INTEGER. OSL implementations of these interfaces must now
10108 handle the case where the Width parameter is 64.
10110 Index Fields: Fixed a problem where unaligned bit assembly and
10111 disassembly for IndexFields was not supported correctly.
10113 Index and Bank Fields: Nested Index and Bank Fields are now
10114 supported. During field access, a check is performed to ensure
10115 that the value written to an Index or Bank register is not out of
10116 the range of the register. The Index (or Bank) register is
10117 written before each access to the field data. Future support will
10118 include allowing individual IndexFields to be wider than the
10119 DataRegister width.
10121 Fields: Fixed a problem where the AML interpreter was incorrectly
10122 attempting to write beyond the end of a Field/OpRegion. This was
10123 a boundary case that occurred when a DWORD field was written to a
10124 BYTE access OpRegion, forcing multiple writes and causing the
10125 interpreter to write one datum too many.
10127 Fields: Fixed a problem with Field/OpRegion access where the
10128 starting bit address of a field was incorrectly calculated if the
10129 current access type was wider than a byte (WordAcc, DwordAcc, or
10132 Fields: Fixed a problem where forward references to individual
10133 FieldUnits (individual Field names within a Field definition) were
10134 not resolved during the AML table load.
10136 Fields: Fixed a problem where forward references from a Field
10137 definition to the parent Operation Region definition were not
10138 resolved during the AML table load.
10140 Fields: Duplicate FieldUnit names within a scope are now detected
10141 during AML table load.
10143 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
10144 returned an incorrect name for the root node.
10146 Code and Data Size: Code and Data optimizations have permitted new
10147 feature development with an actual reduction in the library size.
10148 Current core subsystem library sizes are shown below. These are
10149 the code and data sizes for the acpica.lib produced by the
10150 Microsoft Visual C++ 6.0 compiler, and these values do not include
10151 any ACPI driver or OSPM code. The debug version of the code
10152 includes the debug output trace mechanism and has a larger code
10153 and data size. Note that these values will vary depending on the
10154 efficiency of the compiler and the compiler options used during
10157 Previous Release (10_18_01):
10158 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
10159 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
10162 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
10163 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
10167 Improved /proc processor output (Pavel Machek) Re-added
10168 MODULE_LICENSE("GPL") to all modules.
10170 3) ASL Compiler version X2030:
10172 Duplicate FieldUnit names within a scope are now detected and
10177 Programmer Reference updated to reflect OSL and address space
10178 handler interface changes described above.
10180 ----------------------------------------
10181 Summary of changes for this label: 10_18_01
10183 ACPI CA Core Subsystem:
10185 Fixed a problem with the internal object reference count mechanism
10186 that occasionally caused premature object deletion. This resolves
10187 all of the outstanding problem reports where an object is deleted
10188 in the middle of an interpreter evaluation. Although this problem
10189 only showed up in rather obscure cases, the solution to the
10190 problem involved an adjustment of all reference counts involving
10191 objects attached to namespace nodes.
10193 Fixed a problem with Field support in the interpreter where
10194 writing to an aligned field whose length is an exact multiple (2
10195 or greater) of the field access granularity would cause an attempt
10196 to write beyond the end of the field.
10198 The top level AML opcode execution functions within the
10199 interpreter have been renamed with a more meaningful and
10200 consistent naming convention. The modules exmonad.c and
10201 exdyadic.c were eliminated. New modules are exoparg1.c,
10202 exoparg2.c, exoparg3.c, and exoparg6.c.
10204 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
10206 Fixed a problem where the AML debugger was causing some internal
10207 objects to not be deleted during subsystem termination.
10209 Fixed a problem with the external AcpiEvaluateObject interface
10210 where the subsystem would fault if the named object to be
10211 evaluated refered to a constant such as Zero, Ones, etc.
10213 Fixed a problem with IndexFields and BankFields where the
10214 subsystem would fault if the index, data, or bank registers were
10215 not defined in the same scope as the field itself.
10217 Added printf format string checking for compilers that support
10218 this feature. Corrected more than 50 instances of issues with
10219 format specifiers within invocations of ACPI_DEBUG_PRINT
10220 throughout the core subsystem code.
10222 The ASL "Revision" operator now returns the ACPI support level
10223 implemented in the core - the value "2" since the ACPI 2.0 support
10224 is more than 50% implemented.
10226 Enhanced the output of the AML debugger "dump namespace" command
10227 to output in a more human-readable form.
10229 Current core subsystem library code sizes are shown below. These
10231 are the code and data sizes for the acpica.lib produced by the
10232 Microsoft Visual C++ 6.0 compiler, and these values do not include
10233 any ACPI driver or OSPM code. The debug version of the code
10234 includes the full debug trace mechanism -- leading to a much
10236 larger code and data size. Note that these values will vary
10237 depending on the efficiency of the compiler and the compiler
10238 options used during generation.
10240 Previous Label (09_20_01):
10241 Non-Debug Version: 65K Code, 5K Data, 70K Total
10242 Debug Version: 138K Code, 58K Data, 196K Total
10246 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
10247 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
10251 Implemented a "Bad BIOS Blacklist" to track machines that have
10252 known ASL/AML problems.
10254 Enhanced the /proc interface for the thermal zone driver and added
10255 support for _HOT (the critical suspend trip point). The 'info'
10256 file now includes threshold/policy information, and allows setting
10257 of _SCP (cooling preference) and _TZP (polling frequency) values
10258 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
10259 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
10260 preference to the passive/quiet mode (if supported by the ASL).
10262 Implemented a workaround for a gcc bug that resuted in an OOPs
10263 when loading the control method battery driver.
10265 ----------------------------------------
10266 Summary of changes for this label: 09_20_01
10268 ACPI CA Core Subsystem:
10270 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
10271 modified to allow individual GPE levels to be flagged as wake-
10272 enabled (i.e., these GPEs are to remain enabled when the platform
10275 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
10276 support wake-enabled GPEs. This means that upon entering the
10277 sleep state, all GPEs that are not wake-enabled are disabled.
10278 When leaving the sleep state, these GPEs are reenabled.
10280 A local double-precision divide/modulo module has been added to
10281 enhance portability to OS kernels where a 64-bit math library is
10282 not available. The new module is "utmath.c".
10284 Several optimizations have been made to reduce the use of CPU
10285 stack. Originally over 2K, the maximum stack usage is now below
10286 2K at 1860 bytes (1.82k)
10288 Fixed a problem with the AcpiGetFirmwareTable interface where the
10289 root table pointer was not mapped into a logical address properly.
10291 Fixed a problem where a NULL pointer was being dereferenced in the
10292 interpreter code for the ASL Notify operator.
10294 Fixed a problem where the use of the ASL Revision operator
10295 returned an error. This operator now returns the current version
10296 of the ACPI CA core subsystem.
10298 Fixed a problem where objects passed as control method parameters
10299 to AcpiEvaluateObject were always deleted at method termination.
10300 However, these objects may end up being stored into the namespace
10301 by the called method. The object reference count mechanism was
10302 applied to these objects instead of a force delete.
10304 Fixed a problem where static strings or buffers (contained in the
10305 AML code) that are declared as package elements within the ASL
10306 code could cause a fault because the interpreter would attempt to
10307 delete them. These objects are now marked with the "static
10308 object" flag to prevent any attempt to delete them.
10310 Implemented an interpreter optimization to use operands directly
10311 from the state object instead of extracting the operands to local
10312 variables. This reduces stack use and code size, and improves
10315 The module exxface.c was eliminated as it was an unnecessary extra
10318 Current core subsystem library code sizes are shown below. These
10319 are the code and data sizes for the acpica.lib produced by the
10320 Microsoft Visual C++ 6.0 compiler, and these values do not include
10321 any ACPI driver or OSPM code. The debug version of the code
10322 includes the full debug trace mechanism -- leading to a much
10323 larger code and data size. Note that these values will vary
10324 depending on the efficiency of the compiler and the compiler
10325 options used during generation.
10327 Non-Debug Version: 65K Code, 5K Data, 70K Total
10328 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
10329 Total (Previously 195K)
10333 Support for ACPI 2.0 64-bit integers has been added. All ACPI
10334 Integer objects are now 64 bits wide
10336 All Acpi data types and structures are now in lower case. Only
10337 Acpi macros are upper case for differentiation.
10341 Changes to the external interfaces as described above.
10343 ----------------------------------------
10344 Summary of changes for this label: 08_31_01
10346 ACPI CA Core Subsystem:
10348 A bug with interpreter implementation of the ASL Divide operator
10349 was found and fixed. The implicit function return value (not the
10350 explicit store operands) was returning the remainder instead of
10351 the quotient. This was a longstanding bug and it fixes several
10352 known outstanding issues on various platforms.
10354 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
10355 been further optimized for size. There are 700 invocations of the
10356 DEBUG_PRINT macro alone, so each optimization reduces the size of
10357 the debug version of the subsystem significantly.
10359 A stack trace mechanism has been implemented. The maximum stack
10360 usage is about 2K on 32-bit platforms. The debugger command "stat
10361 stack" will display the current maximum stack usage.
10363 All public symbols and global variables within the subsystem are
10364 now prefixed with the string "Acpi". This keeps all of the
10365 symbols grouped together in a kernel map, and avoids conflicts
10366 with other kernel subsystems.
10368 Most of the internal fixed lookup tables have been moved into the
10369 code segment via the const operator.
10371 Several enhancements have been made to the interpreter to both
10372 reduce the code size and improve performance.
10374 Current core subsystem library code sizes are shown below. These
10375 are the code and data sizes for the acpica.lib produced by the
10376 Microsoft Visual C++ 6.0 compiler, and these values do not include
10377 any ACPI driver or OSPM code. The debug version of the code
10378 includes the full debug trace mechanism which contains over 700
10379 invocations of the DEBUG_PRINT macro, 500 function entry macro
10380 invocations, and over 900 function exit macro invocations --
10381 leading to a much larger code and data size. Note that these
10382 values will vary depending on the efficiency of the compiler and
10383 the compiler options used during generation.
10385 Non-Debug Version: 64K Code, 5K Data, 69K Total
10386 Debug Version: 137K Code, 58K Data, 195K Total
10390 Implemented wbinvd() macro, pending a kernel-wide definition.
10392 Fixed /proc/acpi/event to handle poll() and short reads.
10394 ASL Compiler, version X2026:
10396 Fixed a problem introduced in the previous label where the AML
10398 code emitted for package objects produced packages with zero
10401 ----------------------------------------
10402 Summary of changes for this label: 08_16_01
10404 ACPI CA Core Subsystem:
10406 The following ACPI 2.0 ASL operators have been implemented in the
10407 AML interpreter (These are already supported by the Intel ASL
10408 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
10409 ToBuffer. Support for 64-bit AML constants is implemented in the
10410 AML parser, debugger, and disassembler.
10412 The internal memory tracking mechanism (leak detection code) has
10413 been upgraded to reduce the memory overhead (a separate tracking
10414 block is no longer allocated for each memory allocation), and now
10415 supports all of the internal object caches.
10417 The data structures and code for the internal object caches have
10418 been coelesced and optimized so that there is a single cache and
10419 memory list data structure and a single group of functions that
10420 implement generic cache management. This has reduced the code
10421 size in both the debug and release versions of the subsystem.
10423 The DEBUG_PRINT macro(s) have been optimized for size and replaced
10424 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
10425 different, because it generates a single call to an internal
10426 function. This results in a savings of about 90 bytes per
10427 invocation, resulting in an overall code and data savings of about
10428 16% in the debug version of the subsystem.
10432 Fixed C3 disk corruption problems and re-enabled C3 on supporting
10435 Integrated low-level sleep code by Patrick Mochel.
10437 Further tweaked source code Linuxization.
10443 Support for ACPI 2.0 variable length packages is fixed/completed.
10445 Fixed a problem where the optional length parameter for the ACPI
10446 2.0 ToString operator.
10448 Fixed multiple extraneous error messages when a syntax error is
10449 detected within the declaration line of a control method.
10451 ----------------------------------------
10452 Summary of changes for this label: 07_17_01
10454 ACPI CA Core Subsystem:
10456 Added a new interface named AcpiGetFirmwareTable to obtain any
10457 ACPI table via the ACPI signature. The interface can be called at
10458 any time during kernel initialization, even before the kernel
10459 virtual memory manager is initialized and paging is enabled. This
10460 allows kernel subsystems to obtain ACPI tables very early, even
10461 before the ACPI CA subsystem is initialized.
10463 Fixed a problem where Fields defined with the AnyAcc attribute
10464 could be resolved to the incorrect address under the following
10465 conditions: 1) the field width is larger than 8 bits and 2) the
10466 parent operation region is not defined on a DWORD boundary.
10468 Fixed a problem where the interpreter is not being locked during
10469 namespace initialization (during execution of the _INI control
10470 methods), causing an error when an attempt is made to release it
10473 ACPI 2.0 support in the AML Interpreter has begun and will be
10474 ongoing throughout the rest of this year. In this label, The Mod
10475 operator is implemented.
10477 Added a new data type to contain full PCI addresses named
10478 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
10479 and Function values.
10483 Enhanced the Linux version of the source code to change most
10484 capitalized ACPI type names to lowercase. For example, all
10485 instances of ACPI_STATUS are changed to acpi_status. This will
10486 result in a large diff, but the change is strictly cosmetic and
10487 aligns the CA code closer to the Linux coding standard.
10491 The interfaces to the PCI configuration space have been changed to
10492 add the PCI Segment number and to split the single 32-bit combined
10493 DeviceFunction field into two 16-bit fields. This was
10494 accomplished by moving the four values that define an address in
10495 PCI configuration space (segment, bus, device, and function) to
10496 the new ACPI_PCI_ID structure.
10498 The changes to the PCI configuration space interfaces led to a
10499 reexamination of the complete set of address space access
10500 interfaces for PCI, I/O, and Memory. The previously existing 18
10501 interfaces have proven difficult to maintain (any small change
10502 must be propagated across at least 6 interfaces) and do not easily
10503 allow for future expansion to 64 bits if necessary. Also, on some
10504 systems, it would not be appropriate to demultiplex the access
10505 width (8, 16, 32,or 64) before calling the OSL if the
10506 corresponding native OS interfaces contain a similar access width
10507 parameter. For these reasons, the 18 address space interfaces
10508 have been replaced by these 6 new ones:
10510 AcpiOsReadPciConfiguration
10511 AcpiOsWritePciConfiguration
10517 Added a new interface named AcpiOsGetRootPointer to allow the OSL
10518 to perform the platform and/or OS-specific actions necessary to
10519 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
10520 interface will simply call down to the CA core to perform the low-
10521 memory search for the table. On IA-64, the RSDP is obtained from
10522 EFI. Migrating this interface to the OSL allows the CA core to
10524 remain OS and platform independent.
10526 Added a new interface named AcpiOsSignal to provide a generic
10527 "function code and pointer" interface for various miscellaneous
10528 signals and notifications that must be made to the host OS. The
10529 first such signals are intended to support the ASL Fatal and
10530 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
10531 interface has been obsoleted.
10533 The definition of the AcpiFormatException interface has been
10534 changed to simplify its use. The caller no longer must supply a
10535 buffer to the call; A pointer to a const string is now returned
10536 directly. This allows the call to be easily used in printf
10537 statements, etc. since the caller does not have to manage a local
10541 ASL Compiler, Version X2025:
10543 The ACPI 2.0 Switch/Case/Default operators have been implemented
10544 and are fully functional. They will work with all ACPI 1.0
10545 interpreters, since the operators are simply translated to If/Else
10548 The ACPI 2.0 ElseIf operator is implemented and will also work
10549 with 1.0 interpreters, for the same reason.
10551 Implemented support for ACPI 2.0 variable-length packages. These
10552 packages have a separate opcode, and their size is determined by
10553 the interpreter at run-time.
10555 Documentation The ACPI CA Programmer Reference has been updated to
10556 reflect the new interfaces and changes to existing interfaces.
10558 ------------------------------------------
10559 Summary of changes for this label: 06_15_01
10561 ACPI CA Core Subsystem:
10563 Fixed a problem where a DWORD-accessed field within a Buffer
10564 object would get its byte address inadvertently rounded down to
10565 the nearest DWORD. Buffers are always Byte-accessible.
10567 ASL Compiler, version X2024:
10569 Fixed a problem where the Switch() operator would either fault or
10570 hang the compiler. Note however, that the AML code for this ACPI
10571 2.0 operator is not yet implemented.
10573 Compiler uses the new AcpiOsGetTimer interface to obtain compile
10576 Implementation of the CreateField operator automatically converts
10577 a reference to a named field within a resource descriptor from a
10578 byte offset to a bit offset if required.
10580 Added some missing named fields from the resource descriptor
10581 support. These are the names that are automatically created by the
10582 compiler to reference fields within a descriptor. They are only
10583 valid at compile time and are not passed through to the AML
10586 Resource descriptor named fields are now typed as Integers and
10587 subject to compile-time typechecking when used in expressions.
10589 ------------------------------------------
10590 Summary of changes for this label: 05_18_01
10592 ACPI CA Core Subsystem:
10594 Fixed a couple of problems in the Field support code where bits
10595 from adjacent fields could be returned along with the proper field
10596 bits. Restructured the field support code to improve performance,
10597 readability and maintainability.
10599 New DEBUG_PRINTP macro automatically inserts the procedure name
10600 into the output, saving hundreds of copies of procedure name
10601 strings within the source, shrinking the memory footprint of the
10602 debug version of the core subsystem.
10604 Source Code Structure:
10606 The source code directory tree was restructured to reflect the
10607 current organization of the component architecture. Some files
10608 and directories have been moved and/or renamed.
10612 Fixed leaking kacpidpc processes.
10614 Fixed queueing event data even when /proc/acpi/event is not
10617 ASL Compiler, version X2020:
10619 Memory allocation performance enhancement - over 24X compile time
10620 improvement on large ASL files. Parse nodes and namestring
10621 buffers are now allocated from a large internal compiler buffer.
10623 The temporary .SRC file is deleted unless the "-s" option is
10626 The "-d" debug output option now sends all output to the .DBG file
10627 instead of the console.
10629 "External" second parameter is now optional
10631 "ElseIf" syntax now properly allows the predicate
10633 Last operand to "Load" now recognized as a Target operand
10635 Debug object can now be used anywhere as a normal object.
10637 ResourceTemplate now returns an object of type BUFFER
10639 EISAID now returns an object of type INTEGER
10641 "Index" now works with a STRING operand
10643 "LoadTable" now accepts optional parameters
10645 "ToString" length parameter is now optional
10647 "Interrupt (ResourceType," parse error fixed.
10649 "Register" with a user-defined region space parse error fixed
10651 Escaped backslash at the end of a string ("\\") scan/parse error
10654 "Revision" is now an object of type INTEGER.
10658 ------------------------------------------
10659 Summary of changes for this label: 05_02_01
10663 /proc/acpi/event now blocks properly.
10665 Removed /proc/sys/acpi. You can still dump your DSDT from
10668 ACPI CA Core Subsystem:
10670 Fixed a problem introduced in the previous label where some of the
10671 "small" resource descriptor types were not recognized.
10673 Improved error messages for the case where an ASL Field is outside
10674 the range of the parent operation region.
10676 ASL Compiler, version X2018:
10679 Added error detection for ASL Fields that extend beyond the length
10680 of the parent operation region (only if the length of the region
10681 is known at compile time.) This includes fields that have a
10682 minimum access width that is smaller than the parent region, and
10683 individual field units that are partially or entirely beyond the
10684 extent of the parent.
10688 ------------------------------------------
10689 Summary of changes for this label: 04_27_01
10691 ACPI CA Core Subsystem:
10693 Fixed a problem where the namespace mutex could be released at the
10694 wrong time during execution of AcpiRemoveAddressSpaceHandler.
10696 Added optional thread ID output for debug traces, to simplify
10697 debugging of multiple threads. Added context switch notification
10698 when the debug code realizes that a different thread is now
10699 executing ACPI code.
10701 Some additional external data types have been prefixed with the
10702 string "ACPI_" for consistency. This may effect existing code.
10703 The data types affected are the external callback typedefs - e.g.,
10705 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
10709 Fixed an issue with the OSL semaphore implementation where a
10710 thread was waking up with an error from receiving a SIGCHLD
10713 Linux version of ACPI CA now uses the system C library for string
10714 manipulation routines instead of a local implementation.
10716 Cleaned up comments and removed TBDs.
10718 ASL Compiler, version X2017:
10720 Enhanced error detection and reporting for all file I/O
10725 Programmer Reference updated to version 1.06.
10729 ------------------------------------------
10730 Summary of changes for this label: 04_13_01
10732 ACPI CA Core Subsystem:
10734 Restructured support for BufferFields and RegionFields.
10735 BankFields support is now fully operational. All known 32-bit
10736 limitations on field sizes have been removed. Both BufferFields
10737 and (Operation) RegionFields are now supported by the same field
10740 Resource support now supports QWORD address and IO resources. The
10741 16/32/64 bit address structures and the Extended IRQ structure
10742 have been changed to properly handle Source Resource strings.
10744 A ThreadId of -1 is now used to indicate a "mutex not acquired"
10745 condition internally and must never be returned by AcpiOsThreadId.
10746 This reserved value was changed from 0 since Unix systems allow a
10751 Driver code reorganized to enhance portability
10753 Added a kernel configuration option to control ACPI_DEBUG
10755 Fixed the EC driver to honor _GLK.
10757 ASL Compiler, version X2016:
10759 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
10760 address space was set to 0, not 0x7f as it should be.
10762 ------------------------------------------
10763 Summary of changes for this label: 03_13_01
10765 ACPI CA Core Subsystem:
10767 During ACPI initialization, the _SB_._INI method is now run if
10770 Notify handler fix - notifies are deferred until the parent method
10771 completes execution. This fixes the "mutex already acquired"
10772 issue seen occasionally.
10774 Part of the "implicit conversion" rules in ACPI 2.0 have been
10775 found to cause compatibility problems with existing ASL/AML. The
10776 convert "result-to-target-type" implementation has been removed
10777 for stores to method Args and Locals. Source operand conversion
10778 is still fully implemented. Possible changes to ACPI 2.0
10779 specification pending.
10781 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
10784 Fix for compiler warnings for 64-bit compiles.
10788 /proc output aligned for easier parsing.
10790 Release-version compile problem fixed.
10792 New kernel configuration options documented in Configure.help.
10794 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
10799 Power resource driver integrated with bus manager.
10801 Fixed kernel fault during active cooling for thermal zones.
10805 The source code tree has been restructured.
10809 ------------------------------------------
10810 Summary of changes for this label: 03_02_01
10812 Linux OS Services Layer (OSL):
10814 Major revision of all Linux-specific code.
10816 Modularized all ACPI-specific drivers.
10818 Added new thermal zone and power resource drivers.
10820 Revamped /proc interface (new functionality is under /proc/acpi).
10822 New kernel configuration options.
10824 Linux known issues:
10826 New kernel configuration options not documented in Configure.help
10830 Module dependencies not currently implemented. If used, they
10831 should be loaded in this order: busmgr, power, ec, system,
10832 processor, battery, ac_adapter, button, thermal.
10834 Modules will not load if CONFIG_MODVERSION is set.
10836 IBM 600E - entering S5 may reboot instead of shutting down.
10838 IBM 600E - Sleep button may generate "Invalid <NULL> context"
10841 Some systems may fail with "execution mutex already acquired"
10844 ACPI CA Core Subsystem:
10846 Added a new OSL Interface, AcpiOsGetThreadId. This was required
10847 for the deadlock detection code. Defined to return a non-zero, 32-
10848 bit thread ID for the currently executing thread. May be a non-
10849 zero constant integer on single-thread systems.
10851 Implemented deadlock detection for internal subsystem mutexes. We
10852 may add conditional compilation for this code (debug only) later.
10854 ASL/AML Mutex object semantics are now fully supported. This
10855 includes multiple acquires/releases by owner and support for the
10857 Mutex SyncLevel parameter.
10859 A new "Force Release" mechanism automatically frees all ASL
10860 Mutexes that have been acquired but not released when a thread
10861 exits the interpreter. This forces conformance to the ACPI spec
10862 ("All mutexes must be released when an invocation exits") and
10863 prevents deadlocked ASL threads. This mechanism can be expanded
10864 (later) to monitor other resource acquisitions if OEM ASL code
10865 continues to misbehave (which it will).
10867 Several new ACPI exception codes have been added for the Mutex
10870 Recursive method calls are now allowed and supported (the ACPI
10871 spec does in fact allow recursive method calls.) The number of
10872 recursive calls is subject to the restrictions imposed by the
10873 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
10876 Implemented support for the SyncLevel parameter for control
10877 methods (ACPI 2.0 feature)
10879 Fixed a deadlock problem when multiple threads attempted to use
10882 Fixed a problem where the string length of a String package
10883 element was not always set in a package returned from
10884 AcpiEvaluateObject.
10886 Fixed a problem where the length of a String package element was
10887 not always included in the length of the overall package returned
10888 from AcpiEvaluateObject.
10890 Added external interfaces (Acpi*) to the ACPI debug memory
10891 manager. This manager keeps a list of all outstanding
10892 allocations, and can therefore detect memory leaks and attempts to
10893 free memory blocks more than once. Useful for code such as the
10894 power manager, etc. May not be appropriate for device drivers.
10895 Performance with the debug code enabled is slow.
10897 The ACPI Global Lock is now an optional hardware element.
10899 ASL Compiler Version X2015:
10901 Integrated changes to allow the compiler to be generated on
10902 multiple platforms.
10904 Linux makefile added to generate the compiler on Linux
10908 All platform-specific headers have been moved to their own
10909 subdirectory, Include/Platform.
10911 New source file added, Interpreter/ammutex.c
10913 New header file, Include/acstruct.h
10917 The programmer reference has been updated for the following new
10918 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
10920 ------------------------------------------
10921 Summary of changes for this label: 02_08_01
10923 Core ACPI CA Subsystem: Fixed a problem where an error was
10924 incorrectly returned if the return resource buffer was larger than
10925 the actual data (in the resource interfaces).
10927 References to named objects within packages are resolved to the
10929 full pathname string before packages are returned directly (via
10930 the AcpiEvaluateObject interface) or indirectly via the resource
10933 Linux OS Services Layer (OSL):
10935 Improved /proc battery interface.
10938 Added C-state debugging output and other miscellaneous fixes.
10940 ASL Compiler Version X2014:
10942 All defined method arguments can now be used as local variables,
10943 including the ones that are not actually passed in as parameters.
10944 The compiler tracks initialization of the arguments and issues an
10945 exception if they are used without prior assignment (just like
10948 The -o option now specifies a filename prefix that is used for all
10949 output files, including the AML output file. Otherwise, the
10950 default behavior is as follows: 1) the AML goes to the file
10951 specified in the DSDT. 2) all other output files use the input
10952 source filename as the base.
10954 ------------------------------------------
10955 Summary of changes for this label: 01_25_01
10957 Core ACPI CA Subsystem: Restructured the implementation of object
10958 store support within the interpreter. This includes support for
10959 the Store operator as well as any ASL operators that include a
10962 Partially implemented support for Implicit Result-to-Target
10963 conversion. This is when a result object is converted on the fly
10964 to the type of an existing target object. Completion of this
10965 support is pending further analysis of the ACPI specification
10966 concerning this matter.
10968 CPU-specific code has been removed from the subsystem (hardware
10971 New Power Management Timer functions added
10973 Linux OS Services Layer (OSL): Moved system state transition code
10974 to the core, fixed it, and modified Linux OSL accordingly.
10976 Fixed C2 and C3 latency calculations.
10979 We no longer use the compilation date for the version message on
10980 initialization, but retrieve the version from AcpiGetSystemInfo().
10982 Incorporated for fix Sony VAIO machines.
10984 Documentation: The Programmer Reference has been updated and
10988 ASL Compiler: Version X2013: Fixed a problem where the line
10989 numbering and error reporting could get out of sync in the
10990 presence of multiple include files.
10992 ------------------------------------------
10993 Summary of changes for this label: 01_15_01
10995 Core ACPI CA Subsystem:
10997 Implemented support for type conversions in the execution of the
10998 ASL Concatenate operator (The second operand is converted to
10999 match the type of the first operand before concatenation.)
11001 Support for implicit source operand conversion is partially
11002 implemented. The ASL source operand types Integer, Buffer, and
11003 String are freely interchangeable for most ASL operators and are
11004 converted by the interpreter on the fly as required. Implicit
11005 Target operand conversion (where the result is converted to the
11006 target type before storing) is not yet implemented.
11008 Support for 32-bit and 64-bit BCD integers is implemented.
11010 Problem fixed where a field read on an aligned field could cause a
11011 read past the end of the field.
11013 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
11014 does not return a value, but the caller expects one. (The ASL
11015 compiler flags this as a warning.)
11020 1. Static typechecking of all operands is implemented. This
11021 prevents the use of invalid objects (such as using a Package where
11022 an Integer is required) at compile time instead of at interpreter
11024 2. The ASL source line is printed with ALL errors and warnings.
11025 3. Bug fix for source EOF without final linefeed.
11026 4. Debug option is split into a parse trace and a namespace trace.
11027 5. Namespace output option (-n) includes initial values for
11028 integers and strings.
11029 6. Parse-only option added for quick syntax checking.
11030 7. Compiler checks for duplicate ACPI name declarations
11033 1. Relaxed typechecking to allow interchangeability between
11034 strings, integers, and buffers. These types are now converted by
11035 the interpreter at runtime.
11036 2. Compiler reports time taken by each internal subsystem in the
11040 ------------------------------------------
11041 Summary of changes for this label: 12_14_00
11045 This is the first official release of the compiler. Since the
11046 compiler requires elements of the Core Subsystem, this label
11047 synchronizes everything.
11049 ------------------------------------------
11050 Summary of changes for this label: 12_08_00
11053 Fixed a problem where named references within the ASL definition
11054 of both OperationRegions and CreateXXXFields did not work
11055 properly. The symptom was an AE_AML_OPERAND_TYPE during
11056 initialization of the region/field. This is similar (but not
11057 related internally) to the problem that was fixed in the last
11060 Implemented both 32-bit and 64-bit support for the BCD ASL
11061 functions ToBCD and FromBCD.
11063 Updated all legal headers to include "2000" in the copyright
11066 ------------------------------------------
11067 Summary of changes for this label: 12_01_00
11069 Fixed a problem where method invocations within the ASL definition
11070 of both OperationRegions and CreateXXXFields did not work
11071 properly. The symptom was an AE_AML_OPERAND_TYPE during
11072 initialization of the region/field:
11074 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
11075 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
11078 Fixed a problem where operators with more than one nested
11079 subexpression would fail. The symptoms were varied, by mostly
11080 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
11081 problem that has gone unnoticed until now.
11083 Subtract (Add (1,2), Multiply (3,4))
11085 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
11086 previous build (The prefix part of a relative path was handled
11089 Fixed a problem where Operation Region initialization failed if
11090 the operation region name was a "namepath" instead of a simple
11091 "nameseg". Symptom was an AE_NO_OPERAND error.
11093 Fixed a problem where an assignment to a local variable via the
11094 indirect RefOf mechanism only worked for the first such
11095 assignment. Subsequent assignments were ignored.
11097 ------------------------------------------
11098 Summary of changes for this label: 11_15_00
11100 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
11101 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
11102 the AML interpreter does NOT have support for the new 2.0 ASL
11103 grammar terms at this time.
11105 All ACPI hardware access is via the GAS structures in the ACPI 2.0
11108 All physical memory addresses across all platforms are now 64 bits
11109 wide. Logical address width remains dependent on the platform
11112 AcpiOsMapMemory interface changed to a 64-bit physical address.
11114 The AML interpreter integer size is now 64 bits, as per the ACPI
11117 For backwards compatibility with ACPI 1.0, ACPI tables with a
11118 revision number less than 2 use 32-bit integers only.
11120 Fixed a problem where the evaluation of OpRegion operands did not
11121 always resolve them to numbers properly.
11123 ------------------------------------------
11124 Summary of changes for this label: 10_20_00
11126 Fix for CBN_._STA issue. This fix will allow correct access to
11127 CBN_ OpRegions when the _STA returns 0x8.
11129 Support to convert ACPI constants (Ones, Zeros, One) to actual
11130 values before a package object is returned
11132 Fix for method call as predicate to if/while construct causing
11133 incorrect if/while behavior
11135 Fix for Else block package lengths sometimes calculated wrong (if
11138 Fix for Processor object length field, was always zero
11140 Table load abort if FACP sanity check fails
11142 Fix for problem with Scope(name) if name already exists
11144 Warning emitted if a named object referenced cannot be found
11145 (resolved) during method execution.
11151 ------------------------------------------
11152 Summary of changes for this label: 9_29_00
11154 New table initialization interfaces: AcpiInitializeSubsystem no
11155 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
11156 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
11157 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
11160 Note: These interface changes require changes to all existing OSDs
11162 The PCI_Config default address space handler is always installed
11163 at the root namespace object.
11165 -------------------------------------------
11166 Summary of changes for this label: 09_15_00
11168 The new initialization architecture is implemented. New
11169 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
11170 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
11172 (Namespace is automatically loaded when a table is loaded)
11174 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
11175 52 bytes to 32 bytes. There is usually one of these for every
11176 namespace object, so the memory savings is significant.
11178 Implemented just-in-time evaluation of the CreateField operators.
11180 Bug fixes for IA-64 support have been integrated.
11182 Additional code review comments have been implemented
11184 The so-called "third pass parse" has been replaced by a final walk
11185 through the namespace to initialize all operation regions (address
11186 spaces) and fields that have not yet been initialized during the
11187 execution of the various _INI and REG methods.
11189 New file - namespace/nsinit.c
11191 -------------------------------------------
11192 Summary of changes for this label: 09_01_00
11194 Namespace manager data structures have been reworked to change the
11195 primary object from a table to a single object. This has
11196 resulted in dynamic memory savings of 3X within the namespace and
11197 2X overall in the ACPI CA subsystem.
11199 Fixed problem where the call to AcpiEvFindPciRootBuses was
11200 inadvertently left commented out.
11202 Reduced the warning count when generating the source with the GCC
11205 Revision numbers added to each module header showing the
11206 SourceSafe version of the file. Please refer to this version
11207 number when giving us feedback or comments on individual modules.
11209 The main object types within the subsystem have been renamed to
11210 clarify their purpose:
11212 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
11213 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
11214 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
11216 NOTE: no changes to the initialization sequence are included in
11219 -------------------------------------------
11220 Summary of changes for this label: 08_23_00
11222 Fixed problem where TerminateControlMethod was being called
11223 multiple times per method
11225 Fixed debugger problem where single stepping caused a semaphore to
11228 Improved performance through additional parse object caching -
11229 added ACPI_EXTENDED_OP type
11231 -------------------------------------------
11232 Summary of changes for this label: 08_10_00
11234 Parser/Interpreter integration: Eliminated the creation of
11235 complete parse trees for ACPI tables and control methods.
11236 Instead, parse subtrees are created and then deleted as soon as
11237 they are processed (Either entered into the namespace or executed
11238 by the interpreter). This reduces the use of dynamic kernel
11239 memory significantly. (about 10X)
11241 Exception codes broken into classes and renumbered. Be sure to
11242 recompile all code that includes acexcep.h. Hopefully we won't
11243 have to renumber the codes again now that they are split into
11244 classes (environment, programmer, AML code, ACPI table, and
11247 Fixed some additional alignment issues in the Resource Manager
11250 Implemented semaphore tracking in the AcpiExec utility, and fixed
11251 several places where mutexes/semaphores were being unlocked
11252 without a corresponding lock operation. There are no known
11253 semaphore or mutex "leaks" at this time.
11255 Fixed the case where an ASL Return operator is used to return an
11258 -------------------------------------------
11259 Summary of changes for this label: 07_28_00
11261 Fixed a problem with the way addresses were calculated in
11262 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
11263 manifested itself when a Field was created with WordAccess or
11264 DwordAccess, but the field unit defined within the Field was less
11266 than a Word or Dword.
11268 Fixed a problem in AmlDumpOperands() module's loop to pull
11269 operands off of the operand stack to display information. The
11270 problem manifested itself as a TLB error on 64-bit systems when
11271 accessing an operand stack with two or more operands.
11273 Fixed a problem with the PCI configuration space handlers where
11274 context was getting confused between accesses. This required a
11275 change to the generic address space handler and address space
11276 setup definitions. Handlers now get both a global handler context
11277 (this is the one passed in by the user when executing
11278 AcpiInstallAddressSpaceHandler() and a specific region context
11279 that is unique to each region (For example, the _ADR, _SEG and
11280 _BBN values associated with a specific region). The generic
11281 function definitions have changed to the following:
11283 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
11284 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
11285 *HandlerContext, // This used to be void *Context void
11286 *RegionContext); // This is an additional parameter
11288 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
11289 RegionHandle, UINT32 Function, void *HandlerContext, void
11290 **RegionContext); // This used to be **ReturnContext
11292 -------------------------------------------
11293 Summary of changes for this label: 07_21_00
11295 Major file consolidation and rename. All files within the
11296 interpreter have been renamed as well as most header files. This
11297 was done to prevent collisions with existing files in the host
11298 OSs -- filenames such as "config.h" and "global.h" seem to be
11299 quite common. The VC project files have been updated. All
11300 makefiles will require modification.
11302 The parser/interpreter integration continues in Phase 5 with the
11303 implementation of a complete 2-pass parse (the AML is parsed
11304 twice) for each table; This avoids the construction of a huge
11305 parse tree and therefore reduces the amount of dynamic memory
11306 required by the subsystem. Greater use of the parse object cache
11307 means that performance is unaffected.
11309 Many comments from the two code reviews have been rolled in.
11311 The 64-bit alignment support is complete.
11313 -------------------------------------------
11314 Summary of changes for this label: 06_30_00
11316 With a nod and a tip of the hat to the technology of yesteryear,
11317 we've added support in the source code for 80 column output
11318 devices. The code is now mostly constrained to 80 columns or
11319 less to support environments and editors that 1) cannot display
11320 or print more than 80 characters on a single line, and 2) cannot
11321 disable line wrapping.
11323 A major restructuring of the namespace data structure has been
11324 completed. The result is 1) cleaner and more
11325 understandable/maintainable code, and 2) a significant reduction
11326 in the dynamic memory requirement for each named ACPI object
11329 -------------------------------------------
11330 Summary of changes for this label: 06_23_00
11332 Linux support has been added. In order to obtain approval to get
11333 the ACPI CA subsystem into the Linux kernel, we've had to make
11334 quite a few changes to the base subsystem that will affect all
11335 users (all the changes are generic and OS- independent). The
11336 effects of these global changes have been somewhat far reaching.
11337 Files have been merged and/or renamed and interfaces have been
11338 renamed. The major changes are described below.
11340 Osd* interfaces renamed to AcpiOs* to eliminate namespace
11341 pollution/confusion within our target kernels. All OSD
11342 interfaces must be modified to match the new naming convention.
11344 Files merged across the subsystem. A number of the smaller source
11345 and header files have been merged to reduce the file count and
11346 increase the density of the existing files. There are too many
11347 to list here. In general, makefiles that call out individual
11348 files will require rebuilding.
11350 Interpreter files renamed. All interpreter files now have the
11351 prefix am* instead of ie* and is*.
11353 Header files renamed: The acapi.h file is now acpixf.h. The
11354 acpiosd.h file is now acpiosxf.h. We are removing references to
11355 the acronym "API" since it is somewhat windowsy. The new name is
11356 "external interface" or xface or xf in the filenames.j
11359 All manifest constants have been forced to upper case (some were
11360 mixed case.) Also, the string "ACPI_" has been prepended to many
11361 (not all) of the constants, typedefs, and structs.
11363 The globals "DebugLevel" and "DebugLayer" have been renamed
11364 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
11366 All other globals within the subsystem are now prefixed with
11367 "AcpiGbl_" Internal procedures within the subsystem are now
11368 prefixed with "Acpi" (with only a few exceptions). The original
11369 two-letter abbreviation for the subcomponent remains after "Acpi"
11370 - for example, CmCallocate became AcpiCmCallocate.
11372 Added a source code translation/conversion utility. Used to
11373 generate the Linux source code, it can be modified to generate
11374 other types of source as well. Can also be used to cleanup
11375 existing source by removing extraneous spaces and blank lines.
11376 Found in tools/acpisrc/*
11378 OsdUnMapMemory was renamed to OsdUnmapMemory and then
11379 AcpiOsUnmapMemory. (UnMap became Unmap).
11381 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
11382 When set to one, this indicates that the caller wants to use the
11384 semaphore as a mutex, not a counting semaphore. ACPI CA uses
11385 both types. However, implementers of this call may want to use
11386 different OS primitives depending on the type of semaphore
11387 requested. For example, some operating systems provide separate
11389 "mutex" and "semaphore" interfaces - where the mutex interface is
11390 much faster because it doesn't have all the overhead of a full
11391 semaphore implementation.
11393 Fixed a deadlock problem where a method that accesses the PCI
11394 address space can block forever if it is the first access to the
11397 -------------------------------------------
11398 Summary of changes for this label: 06_02_00
11400 Support for environments that cannot handle unaligned data
11401 accesses (e.g. firmware and OS environments devoid of alignment
11402 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
11403 been added (via configurable macros) in these three areas: -
11404 Transfer of data from the raw AML byte stream is done via byte
11405 moves instead of word/dword/qword moves. - External objects are
11406 aligned within the user buffer, including package elements (sub-
11407 objects). - Conversion of name strings to UINT32 Acpi Names is now
11410 The Store operator was modified to mimic Microsoft's
11411 implementation when storing to a Buffer Field.
11413 Added a check of the BM_STS bit before entering C3.
11415 The methods subdirectory has been obsoleted and removed. A new
11416 file, cmeval.c subsumes the functionality.
11418 A 16-bit (DOS) version of AcpiExec has been developed. The
11419 makefile is under the acpiexec directory.