1 ----------------------------------------
2 21 January 2010. Summary of changes for version 20100121:
4 1) ACPI CA Core Subsystem:
6 Added the 2010 copyright to all module headers and signons. This affects
7 virtually every file in the ACPICA core subsystem, the iASL compiler, the
8 tools/utilities, and the test suites.
10 Implemented a change to the AcpiGetDevices interface to eliminate unnecessary
11 invocations of the _STA method. In the case where a specific _HID is
12 requested, do not run _STA until a _HID match is found. This eliminates
13 potentially dozens of _STA calls during a search for a particular device/HID,
14 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
16 Implemented an additional repair for predefined method return values. Attempt
17 to repair unexpected NULL elements within returned Package objects. Create an
18 Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.
19 ACPICA BZ 818. Lin Ming, Bob Moore.
21 Removed the obsolete ACPI_INTEGER data type. This type was introduced as the
22 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with
23 64-bit AML integers). It is now obsolete and this change removes it from the
24 ACPICA code base, replaced by UINT64. The original typedef has been retained
25 for now for compatibility with existing device driver code. ACPICA BZ 824.
27 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in
28 the parse tree object.
30 Added additional warning options for the gcc-4 generation. Updated the source
31 accordingly. This includes some code restructuring to eliminate unreachable
32 code, elimination of some gotos, elimination of unused return values, some
33 additional casting, and removal of redundant declarations.
35 Example Code and Data Size: These are the sizes for the OS-independent
36 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
37 debug version of the code includes the debug output trace mechanism and has a
38 much larger code and data size.
41 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
42 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
44 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
45 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
47 2) iASL Compiler/Disassembler and Tools:
49 No functional changes for this release.
51 ----------------------------------------
52 14 December 2009. Summary of changes for version 20091214:
54 1) ACPI CA Core Subsystem:
56 Enhanced automatic data type conversions for predefined name repairs. This
57 change expands the automatic repairs/conversions for predefined name return
58 values to make Integers, Strings, and Buffers fully interchangeable. Also, a
59 Buffer can be converted to a Package of Integers if necessary. The nsrepair.c
60 module was completely restructured. Lin Ming, Bob Moore.
62 Implemented automatic removal of null package elements during predefined name
63 repairs. This change will automatically remove embedded and trailing NULL
64 package elements from returned package objects that are defined to contain a
65 variable number of sub-packages. The driver is then presented with a package
66 with no null elements to deal with. ACPICA BZ 819.
68 Implemented a repair for the predefined _FDE and _GTM names. The expected
69 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
70 possible problems (both seen in the field), where a package of integers is
71 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.
73 Implemented additional module-level code support. This change will properly
74 execute module-level code that is not at the root of the namespace (under a
75 Device object, etc.). Now executes the code within the current scope instead
76 of the root. ACPICA BZ 762. Lin Ming.
78 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
79 problem where mutex errors can occur when running a _REG method that is in
80 the same scope as a method-defined operation region or an operation region
81 under a module-level IF block. This type of code is rare, so the problem has
82 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
84 Fixed a possible memory leak during module-level code execution. An object
85 could be leaked for each block of executed module-level code if the
86 interpreter slack mode is enabled This change deletes any implicitly returned
87 object from the module-level code block. Lin Ming.
89 Removed messages for successful predefined repair(s). The repair mechanism
90 was considered too wordy. Now, messages are only unconditionally emitted if
91 the return object cannot be repaired. Existing messages for successful
92 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.
94 Example Code and Data Size: These are the sizes for the OS-independent
95 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
96 debug version of the code includes the debug output trace mechanism and has a
97 much larger code and data size.
100 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
101 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
103 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
104 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
106 2) iASL Compiler/Disassembler and Tools:
108 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files
109 were no longer automatically removed at the termination of the compile.
111 acpiexec: Implemented the -f option to specify default region fill value.
112 This option specifies the value used to initialize buffers that simulate
113 operation regions. Default value is zero. Useful for debugging problems that
114 depend on a specific initial value for a region or field.
116 ----------------------------------------
117 12 November 2009. Summary of changes for version 20091112:
119 1) ACPI CA Core Subsystem:
121 Implemented a post-order callback to AcpiWalkNamespace. The existing
122 interface only has a pre-order callback. This change adds an additional
123 parameter for a post-order callback which will be more useful for bus scans.
124 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
126 Modified the behavior of the operation region memory mapping cache for
127 SystemMemory. Ensure that the memory mappings created for operation regions
128 do not cross 4K page boundaries. Crossing a page boundary while mapping
129 regions can cause kernel warnings on some hosts if the pages have different
130 attributes. Such regions are probably BIOS bugs, and this is the workaround.
131 Linux BZ 14445. Lin Ming.
133 Implemented an automatic repair for predefined methods that must return
134 sorted lists. This change will repair (by sorting) packages returned by _ALR,
135 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
136 and do not contain NULL package elements. Adds one new file,
137 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
139 Fixed a possible fault during predefined name validation if a return Package
140 object contains NULL elements. Also adds a warning if a NULL element is
141 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
142 include repair or removal of all such NULL elements where possible.
144 Implemented additional module-level executable AML code support. This change
145 will execute module-level code that is not at the root of the namespace
146 (under a Device object, etc.) at table load time. Module-level executable AML
147 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
149 Implemented a new internal function to create Integer objects. This function
150 simplifies miscellaneous object creation code. ACPICA BZ 823.
152 Reduced the severity of predefined repair messages, Warning to Info. Since
153 the object was successfully repaired, a warning is too severe. Reduced to an
154 info message for now. These messages may eventually be changed to debug-only.
157 Example Code and Data Size: These are the sizes for the OS-independent
158 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
159 debug version of the code includes the debug output trace mechanism and has a
160 much larger code and data size.
163 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
164 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
166 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
167 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
169 2) iASL Compiler/Disassembler and Tools:
171 iASL: Implemented Switch() with While(1) so that Break works correctly. This
172 change correctly implements the Switch operator with a surrounding While(1)
173 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
175 iASL: Added a message if a package initializer list is shorter than package
176 length. Adds a new remark for a Package() declaration if an initializer list
177 exists, but is shorter than the declared length of the package. Although
178 technically legal, this is probably a coding error and it is seen in the
179 field. ACPICA BZ 815. Lin Ming, Bob Moore.
181 iASL: Fixed a problem where the compiler could fault after the maximum number
182 of errors was reached (200).
184 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
187 ----------------------------------------
188 13 October 2009. Summary of changes for version 20091013:
190 1) ACPI CA Core Subsystem:
192 Fixed a problem where an Operation Region _REG method could be executed more
193 than once. If a custom address space handler is installed by the host before
194 the "initialize operation regions" phase of the ACPICA initialization, any
195 _REG methods for that address space could be executed twice. This change
196 fixes the problem. ACPICA BZ 427. Lin Ming.
198 Fixed a possible memory leak for the Scope() ASL operator. When the exact
199 invocation of "Scope(\)" is executed (change scope to root), one internal
200 operand object was leaked. Lin Ming.
202 Implemented a run-time repair for the _MAT predefined method. If the _MAT
203 return value is defined as a Field object in the AML, and the field
204 size is less than or equal to the default width of an integer (32 or 64),_MAT
205 can incorrectly return an Integer instead of a Buffer. ACPICA now
206 automatically repairs this problem. ACPICA BZ 810.
208 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
209 "OEM Information" field is often incorrectly returned as an Integer with
210 value zero if the field is not supported by the platform. This is due to an
211 ambiguity in the ACPI specification. The field should always be a string.
212 ACPICA now automatically repairs this problem by returning a NULL string
213 within the returned Package. ACPICA BZ 807.
215 Example Code and Data Size: These are the sizes for the OS-independent
216 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
217 debug version of the code includes the debug output trace mechanism and has a
218 much larger code and data size.
221 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
222 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
224 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
225 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
227 2) iASL Compiler/Disassembler and Tools:
229 Disassembler: Fixed a problem where references to external symbols that
230 contained one or more parent-prefixes (carats) were not handled correctly,
231 possibly causing a fault. ACPICA BZ 806. Lin Ming.
233 Disassembler: Restructured the code so that all functions that handle
234 external symbols are in a single module. One new file is added,
237 AML Debugger: Added a max count argument for the Batch command (which
238 executes multiple predefined methods within the namespace.)
240 iASL: Updated the compiler documentation (User Reference.) Available at
241 http://www.acpica.org/documentation/. ACPICA BZ 750.
243 AcpiXtract: Updated for Lint and other formatting changes. Close all open
246 ----------------------------------------
247 03 September 2009. Summary of changes for version 20090903:
249 1) ACPI CA Core Subsystem:
251 For Windows Vista compatibility, added the automatic execution of an _INI
252 method located at the namespace root (\_INI). This method is executed at
253 table load time. This support is in addition to the automatic execution of
256 Fixed a possible memory leak in the interpreter for AML package objects if
257 the package initializer list is longer than the defined size of the package.
258 This apparently can only happen if the BIOS changes the package size on the
259 fly (seen in a _PSS object), as ASL compilers do not allow this. The
260 interpreter will truncate the package to the defined size (and issue an error
261 message), but previously could leave the extra objects undeleted if they were
262 pre-created during the argument processing (such is the case if the package
263 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
265 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
266 This has been reported in the field. Previously, ACPICA would zero out the
267 buffer/string. Now, the operation is treated as a noop. Provides Windows
268 compatibility. ACPICA BZ 803. Lin Ming.
270 Removed an extraneous error message for ASL constructs of the form
271 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
272 are seen in many BIOSs and are once again treated as NOOPs and no error is
273 emitted when they are encountered. ACPICA BZ 785.
275 Fixed an extraneous warning message if a _DSM reserved method returns a
276 Package object. _DSM can return any type of object, so validation on the
277 return type cannot be performed. ACPICA BZ 802.
279 Example Code and Data Size: These are the sizes for the OS-independent
280 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
281 debug version of the code includes the debug output trace mechanism and has a
282 much larger code and data size.
285 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
286 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
288 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
289 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
291 2) iASL Compiler/Disassembler and Tools:
293 iASL: Fixed a problem with the use of the Alias operator and Resource
294 Templates. The correct alias is now constructed and no error is emitted.
297 iASL: Implemented the -I option to specify additional search directories for
298 include files. Allows multiple additional search paths for include files.
299 Directories are searched in the order specified on the command line (after
300 the local directory is searched.) ACPICA BZ 800.
302 iASL: Fixed a problem where the full pathname for include files was not
303 emitted for warnings/errors. This caused the IDE support to not work
304 properly. ACPICA BZ 765.
306 iASL: Implemented the -@ option to specify a Windows-style response file
307 containing additional command line options. ACPICA BZ 801.
309 AcpiExec: Added support to load multiple AML files simultaneously (such as a
310 DSDT and multiple SSDTs). Also added support for wildcards within the AML
311 pathname. These features allow all machine tables to be easily loaded and
312 debugged together. ACPICA BZ 804.
314 Disassembler: Added missing support for disassembly of HEST table Error Bank
317 ----------------------------------------
318 30 July 2009. Summary of changes for version 20090730:
320 The ACPI 4.0 implementation for ACPICA is complete with this release.
322 1) ACPI CA Core Subsystem:
324 ACPI 4.0: Added header file support for all new and changed ACPI tables.
325 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
326 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
327 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
328 have been some ACPI 4.0 changes to other existing tables. Split the large
329 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
331 ACPI 4.0: Implemented predefined name validation for all new names. There are
332 31 new names in ACPI 4.0. The predefined validation module was split into two
333 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
335 Implemented support for so-called "module-level executable code". This is
336 executable AML code that exists outside of any control method and is intended
337 to be executed at table load time. Although illegal since ACPI 2.0, this type
338 of code still exists and is apparently still being created. Blocks of this
339 code are now detected and executed as intended. Currently, the code blocks
340 must exist under either an If, Else, or While construct; these are the
341 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
343 Implemented an automatic dynamic repair for predefined names that return
344 nested Package objects. This applies to predefined names that are defined to
345 return a variable-length Package of sub-packages. If the number of sub-
346 packages is one, BIOS code is occasionally seen that creates a simple single
347 package with no sub-packages. This code attempts to fix the problem by
348 wrapping a new package object around the existing package. These methods can
349 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
352 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
353 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
356 Fixed a problem with AcpiReset where the reset would silently fail if the
357 register was one of the protected I/O ports. AcpiReset now bypasses the port
358 validation mechanism. This may eventually be driven into the AcpiRead/Write
361 Fixed a regression related to the recent update of the AcpiRead/Write
362 interfaces. A sleep/suspend could fail if the optional PM2 Control register
363 does not exist during an attempt to write the Bus Master Arbitration bit.
364 (However, some hosts already delete the code that writes this bit, and the
365 code may in fact be obsolete at this date.) ACPICA BZ 799.
367 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
368 in succession. ACPICA BZ 795.
370 Example Code and Data Size: These are the sizes for the OS-independent
371 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
372 debug version of the code includes the debug output trace mechanism and has a
373 much larger code and data size.
376 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
377 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
379 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
380 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
382 2) iASL Compiler/Disassembler and Tools:
384 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
385 changes to existing tables. ACPICA BZ 775.
387 ----------------------------------------
388 25 June 2009. Summary of changes for version 20090625:
390 The ACPI 4.0 Specification was released on June 16 and is available at
391 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
392 continue for the next few releases.
394 1) ACPI CA Core Subsystem:
396 ACPI 4.0: Implemented interpreter support for the IPMI operation region
397 address space. Includes support for bi-directional data buffers and an IPMI
398 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
401 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
402 support in both the header files and the disassembler.
404 Completed a major update for the AcpiGetObjectInfo external interface.
406 - Support for variable, unlimited length HID, UID, and CID strings.
407 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
408 - Call the _SxW power methods on behalf of a device object.
409 - Determine if a device is a PCI root bridge.
410 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
411 These changes will require an update to all callers of this interface. See
412 the updated ACPICA Programmer Reference for details. One new source file has
413 been added - utilities/utids.c. ACPICA BZ 368, 780.
415 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
416 transfers. The Value parameter has been extended from 32 bits to 64 bits in
417 order to support new ACPI 4.0 tables. These changes will require an update to
418 all callers of these interfaces. See the ACPICA Programmer Reference for
419 details. ACPICA BZ 768.
421 Fixed several problems with AcpiAttachData. The handler was not invoked when
422 the host node was deleted. The data sub-object was not automatically deleted
423 when the host node was deleted. The interface to the handler had an unused
424 parameter, this was removed. ACPICA BZ 778.
426 Enhanced the function that dumps ACPI table headers. All non-printable
427 characters in the string fields are now replaced with '?' (Signature, OemId,
428 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
429 these fields are occasionally seen in the field. ACPICA BZ 788.
431 Fixed a problem with predefined method repair code where the code that
432 attempts to repair/convert an object of incorrect type is only executed on
433 the first time the predefined method is called. The mechanism that disables
434 warnings on subsequent calls was interfering with the repair mechanism.
437 Fixed a possible memory leak in the predefined validation/repair code when a
438 buffer is automatically converted to an expected string object.
440 Removed obsolete 16-bit files from the distribution and from the current git
441 tree head. ACPICA BZ 776.
443 Example Code and Data Size: These are the sizes for the OS-independent
444 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
445 debug version of the code includes the debug output trace mechanism and has a
446 much larger code and data size.
449 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
450 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
452 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
453 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
455 2) iASL Compiler/Disassembler and Tools:
457 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
458 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
460 ACPI 4.0: iASL - implemented compile-time validation support for all new
461 predefined names and control methods (31 total). ACPICA BZ 769.
463 ----------------------------------------
464 21 May 2009. Summary of changes for version 20090521:
466 1) ACPI CA Core Subsystem:
468 Disabled the preservation of the SCI enable bit in the PM1 control register.
469 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
470 a "preserved" bit - "OSPM always preserves this bit position", section
471 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
472 because the bit needs to be explicitly set by the OS as a workaround. No
473 machines fail if the bit is not preserved. Therefore, ACPICA no longer
474 attempts to preserve this bit.
476 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
477 incorrectly formed _PRT package could cause a fault. Added validation to
478 ensure that each package element is actually a sub-package.
480 Implemented a new interface to install or override a single control method,
481 AcpiInstallMethod. This interface is useful when debugging in order to repair
482 an existing method or to install a missing method without having to override
483 the entire ACPI table. See the ACPICA Programmer Reference for use and
484 examples. Lin Ming, Bob Moore.
486 Fixed several reference count issues with the DdbHandle object that is
487 created from a Load or LoadTable operator. Prevent premature deletion of the
488 object. Also, mark the object as invalid once the table has been unloaded.
489 This is needed because the handle itself may not be deleted after the table
490 unload, depending on whether it has been stored in a named object by the
493 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
494 mutexes of the same sync level are acquired but then not released in strict
495 opposite order, the internally maintained Current Sync Level becomes confused
496 and can cause subsequent execution errors. ACPICA BZ 471.
498 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
499 specification has been changed to make the SyncLevel for mutex objects more
500 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
501 same as the current sync level. This makes more sense than the previous rule
502 (SyncLevel less than or equal). This change updates the code to match the
505 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
506 (local) cache must be locked during all cache object deletions. Andrew
509 Updated the Load operator to use operation region interfaces. This replaces
510 direct memory mapping with region access calls. Now, all region accesses go
511 through the installed region handler as they should.
513 Simplified and optimized the NsGetNextNode function. Reduced parameter count
514 and reduced code for this frequently used function.
516 Example Code and Data Size: These are the sizes for the OS-independent
517 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
518 debug version of the code includes the debug output trace mechanism and has a
519 much larger code and data size.
522 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
523 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
525 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
526 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
528 2) iASL Compiler/Disassembler and Tools:
530 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
531 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
532 after an invalid sub-table ID.
534 ----------------------------------------
535 22 April 2009. Summary of changes for version 20090422:
537 1) ACPI CA Core Subsystem:
539 Fixed a compatibility issue with the recently released I/O port protection
540 mechanism. For windows compatibility, 1) On a port protection violation,
541 simply ignore the request and do not return an exception (allow the control
542 method to continue execution.) 2) If only part of the request overlaps a
543 protected port, read/write the individual ports that are not protected. Linux
546 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
547 breaks into the AML debugger if the debugger is present. This matches the
548 ACPI-defined behavior.
550 Fixed several possible warnings related to the use of the configurable
551 ACPI_THREAD_ID. This type can now be configured as either an integer or a
552 pointer with no warnings. Also fixes several warnings in printf-like
553 statements for the 64-bit build when the type is configured as a pointer.
556 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
557 warning options.) Examples include printf formats, aliasing, unused globals,
558 missing prototypes, missing switch default statements, use of non-ANSI
559 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
560 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
562 Example Code and Data Size: These are the sizes for the OS-independent
563 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
564 debug version of the code includes the debug output trace mechanism and has a
565 much larger code and data size.
568 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
569 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
571 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
572 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
574 2) iASL Compiler/Disassembler and Tools:
576 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
579 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
580 correctly digest Windows/DOS formatted files (with CR/LF).
582 iASL: Added a new option for "quiet mode" (-va) that produces only the
583 compilation summary, not individual errors and warnings. Useful for large
586 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
587 timeout that can be used to detect hang conditions during execution of AML
588 code (includes both internal semaphores and AML-defined mutexes and events.)
590 Added new makefiles for the generation of acpica in a generic unix-like
591 environment. These makefiles are intended to generate the acpica tools and
592 utilities from the original acpica git source tree structure.
594 Test Suites: Updated and cleaned up the documentation files. Updated the
595 copyrights to 2009, affecting all source files. Use the new version of iASL
596 with quiet mode. Increased the number of available semaphores in the Windows
597 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
598 an alternate implementation of the semaphore timeout to allow aslts to
599 execute fully on Cygwin.
601 ----------------------------------------
602 20 March 2009. Summary of changes for version 20090320:
604 1) ACPI CA Core Subsystem:
606 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
607 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
608 namespace walks (readers), but block a dynamic table unload until it can gain
609 exclusive write access to the namespace. This fixes a problem where a table
610 unload could (possibly catastrophically) delete the portion of the namespace
611 that is currently being examined by a walk. Adds a new file, utlock.c, that
612 implements the reader/writer lock mechanism. ACPICA BZ 749.
614 Fixed a regression introduced in version 20090220 where a change to the FADT
615 handling could cause the ACPICA subsystem to access non-existent I/O ports.
617 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
618 FADT can contain both 32-bit and 64-bit versions of these addresses.
619 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
620 versions were valid, but not equal, the 64-bit version was used. This was
621 found to cause some machines to fail. Now, in this case, the 32-bit version
622 is used instead. This now matches the Windows behavior.
624 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
625 compatibility and protects the standard PC I/O ports from access via AML
626 code. Adds a new file, hwvalid.c
628 Fixed a possible extraneous warning message from the FADT support. The
629 message warns of a 32/64 length mismatch between the legacy and GAS
630 definitions for a register.
632 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
633 made obsolete by the port protection mechanism above. It was previously used
634 to validate the entire address range of an operation region, which could be
635 incorrect if the range included illegal ports, but fields within the
636 operation region did not actually access those ports. Validation is now
637 performed on a per-field basis instead of the entire region.
639 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
640 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
641 means a read/modify/write when writing to the register. However, for status
642 registers, writing a one means clear the event. Writing a zero means preserve
643 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
644 and the ACPICA code now simply always writes a zero to the ignored bit.
646 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
647 per the ACPI specification, for the control registers, preserve
648 (read/modify/write) all bits that are defined as either reserved or ignored.
650 Updated the handling of write-only bits in the PM1 A/B Control Registers.
651 When reading the register, zero the write-only bits as per the ACPI spec.
652 ACPICA BZ 443. Lin Ming.
654 Removed "Linux" from the list of supported _OSI strings. Linux no longer
655 wants to reply true to this request. The Windows strings are the only paths
656 through the AML that are tested and known to work properly.
659 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
660 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
662 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
663 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
665 2) iASL Compiler/Disassembler and Tools:
667 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
670 ----------------------------------------
671 20 February 2009. Summary of changes for version 20090220:
673 1) ACPI CA Core Subsystem:
675 Optimized the ACPI register locking. Removed locking for reads from the ACPI
676 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
677 not required when reading the single-bit registers. The
678 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
679 This will improve performance for reads on these registers. ACPICA BZ 760.
681 Fixed the parameter validation for AcpiRead/Write. Now return
682 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
683 the register has an address of zero. Previously, these cases simply returned
684 AE_OK. For optional registers such as PM1B status/enable/control, the caller
685 should check for a valid register address before calling. ACPICA BZ 748.
687 Renamed the external ACPI bit register access functions. Renamed
688 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
689 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
690 Also, restructured the code for these functions by simplifying the code path
691 and condensing duplicate code to reduce code size.
693 Added new functions to transparently handle the possibly split PM1 A/B
694 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
695 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
698 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
699 This function writes both of the PM1 control registers (A/B). These registers
700 are different than the PM1 A/B status and enable registers in that different
701 values can be written to the A/B registers. Most notably, the SLP_TYP bits
702 can be different, as per the values returned from the _Sx predefined methods.
704 Removed an extra register write within AcpiHwClearAcpiStatus. This function
705 was writing an optional PM1B status register twice. The existing call to the
706 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
707 register. ACPICA BZ 751.
709 Split out the PM1 Status registers from the FADT. Added new globals for these
710 registers (A/B), similar to the way the PM1 Enable registers are handled.
711 Instead of overloading the FADT Event Register blocks. This makes the code
712 clearer and less prone to error.
714 Fixed the warning message for when the platform contains too many ACPI tables
715 for the default size of the global root table data structure. The calculation
716 for the truncation value was incorrect.
718 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
719 obsolete macro, since it is now a simple reference to ->common.type. There
720 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
722 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
723 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
724 simply SLEEP_TYPE. ACPICA BZ 754.
726 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
727 function is only needed on 64-bit host operating systems and is thus not
728 included for 32-bit hosts.
730 Debug output: print the input and result for invocations of the _OSI reserved
731 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
732 verbosity of this debug level. Len Brown.
734 Example Code and Data Size: These are the sizes for the OS-independent
735 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
736 debug version of the code includes the debug output trace mechanism and has a
737 much larger code and data size.
740 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
741 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
743 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
744 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
746 2) iASL Compiler/Disassembler and Tools:
748 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
749 various legal performance profiles.
751 ----------------------------------------
752 23 January 2009. Summary of changes for version 20090123:
754 1) ACPI CA Core Subsystem:
756 Added the 2009 copyright to all module headers and signons. This affects
757 virtually every file in the ACPICA core subsystem, the iASL compiler, and
760 Implemented a change to allow the host to override any ACPI table, including
761 dynamically loaded tables. Previously, only the DSDT could be replaced by the
762 host. With this change, the AcpiOsTableOverride interface is called for each
763 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
764 a table is dynamically loaded via the AML Load operator.
766 Updated FADT flag definitions, especially the Boot Architecture flags.
768 Debugger: For the Find command, automatically pad the input ACPI name with
769 underscores if the name is shorter than 4 characters. This enables a match
770 with the actual namespace entry which is itself padded with underscores.
772 Example Code and Data Size: These are the sizes for the OS-independent
773 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
774 debug version of the code includes the debug output trace mechanism and has a
775 much larger code and data size.
778 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
779 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
781 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
782 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
784 2) iASL Compiler/Disassembler and Tools:
786 Fix build error under Bison-2.4.
788 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
789 flags. Now decode all flags, regardless of the FADT version. Flag output
790 includes the FADT version which first defined each flag.
792 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
795 ----------------------------------------
796 04 December 2008. Summary of changes for version 20081204:
798 1) ACPI CA Core Subsystem:
800 The ACPICA Programmer Reference has been completely updated and revamped for
801 this release. This includes updates to the external interfaces, OSL
802 interfaces, the overview sections, and the debugger reference.
804 Several new ACPICA interfaces have been implemented and documented in the
805 programmer reference:
806 AcpiReset - Writes the reset value to the FADT-defined reset register.
807 AcpiDisableAllGpes - Disable all available GPEs.
808 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
809 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
810 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
811 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
812 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
814 Most of the public ACPI hardware-related interfaces have been moved to a new
815 file, components/hardware/hwxface.c
817 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
818 register lengths within the FADT are now used, and the low level ACPI
819 register access no longer hardcodes the ACPI register lengths. Given that
820 there may be some risk in actually trusting the FADT register lengths, a run-
821 time option was added to fall back to the default hardcoded lengths if the
822 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
823 option is set to true for now, and a warning is issued if a suspicious FADT
824 register length is overridden with the default value.
826 Fixed a reference count issue in NsRepairObject. This problem was introduced
827 in version 20081031 as part of a fix to repair Buffer objects within
830 Added semaphore support to the Linux/Unix application OS-services layer
831 (OSL). ACPICA BZ 448. Lin Ming.
833 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
834 be implemented in the OSL, or will binary semaphores be used instead.
836 Example Code and Data Size: These are the sizes for the OS-independent
837 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
838 debug version of the code includes the debug output trace mechanism and has a
839 much larger code and data size.
842 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
843 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
845 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
846 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
848 2) iASL Compiler/Disassembler and Tools:
850 iASL: Completed the '-e' option to include additional ACPI tables in order to
851 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
854 iASL: Removed the "named object in while loop" error. The compiler cannot
855 determine how many times a loop will execute. ACPICA BZ 730.
857 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
860 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
862 ----------------------------------------
863 31 October 2008. Summary of changes for version 20081031:
865 1) ACPI CA Core Subsystem:
867 Restructured the ACPICA header files into public/private. acpi.h now includes
868 only the "public" acpica headers. All other acpica headers are "private" and
869 should not be included by acpica users. One new file, accommon.h is used to
870 include the commonly used private headers for acpica code generation. Future
871 plans include moving all private headers to a new subdirectory.
873 Implemented an automatic Buffer->String return value conversion for
874 predefined ACPI methods. For these methods (such as _BIF), added automatic
875 conversion for return objects that are required to be a String, but a Buffer
876 was found instead. This can happen when reading string battery data from an
877 operation region, because it used to be difficult to convert the data from
878 buffer to string from within the ASL. Ensures that the host OS is provided
879 with a valid null-terminated string. Linux BZ 11822.
881 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
882 into two: one for the 32-bit vector, another for the 64-bit vector. This is
883 required because the host OS must setup the wake much differently for each
884 vector (real vs. protected mode, etc.) and the interface itself should not be
885 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
886 interface, as it served no purpose (only the firmware reads the vector, OS
887 only writes the vector.) ACPICA BZ 731.
889 Implemented a mechanism to escape infinite AML While() loops. Added a loop
890 counter to force exit from AML While loops if the count becomes too large.
891 This can occur in poorly written AML when the hardware does not respond
892 within a while loop and the loop does not implement a timeout. The maximum
893 loop count is configurable. A new exception code is returned when a loop is
894 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
896 Optimized the execution of AML While loops. Previously, a control state
897 object was allocated and freed for each execution of the loop. The
898 optimization is to simply reuse the control state for each iteration. This
899 speeds up the raw loop execution time by about 5%.
901 Enhanced the implicit return mechanism. For Windows compatibility, return an
902 implicit integer of value zero for methods that contain no executable code.
903 Such methods are seen in the field as stubs (presumably), and can cause
904 drivers to fail if they expect a return value. Lin Ming.
906 Allow multiple backslashes as root prefixes in namepaths. In a fully
907 qualified namepath, allow multiple backslash prefixes. This can happen (and
908 is seen in the field) because of the use of a double-backslash in strings
909 (since backslash is the escape character) causing confusion. ACPICA BZ 739
912 Emit a warning if two different FACS or DSDT tables are discovered in the
913 FADT. Checks if there are two valid but different addresses for the FACS and
914 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
916 Consolidated the method argument count validation code. Merged the code that
917 validates control method argument counts into the predefined validation
918 module. Eliminates possible multiple warnings for incorrect argument counts.
920 Implemented ACPICA example code. Includes code for ACPICA initialization,
921 handler installation, and calling a control method. Available at
922 source/tools/examples.
924 Added a global pointer for FACS table to simplify internal FACS access. Use
925 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
926 This simplifies the code for the Global Lock and the Firmware Waking
929 Example Code and Data Size: These are the sizes for the OS-independent
930 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
931 debug version of the code includes the debug output trace mechanism and has a
932 much larger code and data size.
935 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
936 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
938 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
939 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
941 2) iASL Compiler/Disassembler and Tools:
943 iASL: Improved disassembly of external method calls. Added the -e option to
944 allow the inclusion of additional ACPI tables to help with the disassembly of
945 method invocations and the generation of external declarations during the
946 disassembly. Certain external method invocations cannot be disassembled
947 properly without the actual declaration of the method. Use the -e option to
948 include the table where the external method(s) are actually declared. Most
949 useful for disassembling SSDTs that make method calls back to the master
950 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
951 -e dsdt.aml ssdt1.aml
953 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
954 problem where the use of an alias within a namepath would result in a not
955 found error or cause the compiler to fault. Also now allows forward
956 references from the Alias operator itself. ACPICA BZ 738.
958 ----------------------------------------
959 26 September 2008. Summary of changes for version 20080926:
961 1) ACPI CA Core Subsystem:
963 Designed and implemented a mechanism to validate predefined ACPI methods and
964 objects. This code validates the predefined ACPI objects (objects whose names
965 start with underscore) that appear in the namespace, at the time they are
966 evaluated. The argument count and the type of the returned object are
967 validated against the ACPI specification. The purpose of this validation is
968 to detect problems with the BIOS-implemented predefined ACPI objects before
969 the results are returned to the ACPI-related drivers. Future enhancements may
970 include actual repair of incorrect return objects where possible. Two new
971 files are nspredef.c and acpredef.h.
973 Fixed a fault in the AML parser if a memory allocation fails during the Op
974 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
976 Fixed an issue with implicit return compatibility. This change improves the
977 implicit return mechanism to be more compatible with the MS interpreter. Lin
980 Implemented support for zero-length buffer-to-string conversions. Allow zero
981 length strings during interpreter buffer-to-string conversions. For example,
982 during the ToDecimalString and ToHexString operators, as well as implicit
983 conversions. Fiodor Suietov, ACPICA BZ 585.
985 Fixed two possible memory leaks in the error exit paths of
986 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
987 similar in that they use a stack of state objects in order to eliminate
988 recursion. The stack must be fully unwound and deallocated if an error
989 occurs. Lin Ming. ACPICA BZ 383.
991 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
992 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
995 Removed the obsolete version number in module headers. Removed the
996 "$Revision" number that appeared in each module header. This version number
997 was useful under SourceSafe and CVS, but has no meaning under git. It is not
998 only incorrect, it could also be misleading.
1000 Example Code and Data Size: These are the sizes for the OS-independent
1001 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1002 debug version of the code includes the debug output trace mechanism and has a
1003 much larger code and data size.
1006 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1007 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1009 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
1010 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
1012 ----------------------------------------
1013 29 August 2008. Summary of changes for version 20080829:
1015 1) ACPI CA Core Subsystem:
1017 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
1018 Reference. Changes include the elimination of cheating on the Object field
1019 for the DdbHandle subtype, addition of a reference class field to
1020 differentiate the various reference types (instead of an AML opcode), and the
1021 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
1023 Reduce an error to a warning for an incorrect method argument count.
1024 Previously aborted with an error if too few arguments were passed to a
1025 control method via the external ACPICA interface. Now issue a warning instead
1026 and continue. Handles the case where the method inadvertently declares too
1027 many arguments, but does not actually use the extra ones. Applies mainly to
1028 the predefined methods. Lin Ming. Linux BZ 11032.
1030 Disallow the evaluation of named object types with no intrinsic value. Return
1031 AE_TYPE for objects that have no value and therefore evaluation is undefined:
1032 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
1033 these types were allowed, but an exception would be generated at some point
1034 during the evaluation. Now, the error is generated up front.
1036 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
1037 (nsnames.c). Fixes a leak in the error exit path.
1039 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
1040 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
1041 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
1044 Removed obsolete and/or unused exception codes from the acexcep.h header.
1045 There is the possibility that certain device drivers may be affected if they
1046 use any of these exceptions.
1048 The ACPICA documentation has been added to the public git source tree, under
1049 acpica/documents. Included are the ACPICA programmer reference, the iASL
1050 compiler reference, and the changes.txt release logfile.
1052 Example Code and Data Size: These are the sizes for the OS-independent
1053 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1054 debug version of the code includes the debug output trace mechanism and has a
1055 much larger code and data size.
1058 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1059 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1061 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1062 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1064 2) iASL Compiler/Disassembler and Tools:
1066 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
1067 defines _SCP with 3 arguments. Previous versions defined it with only 1
1068 argument. iASL now allows both definitions.
1070 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
1071 length subtables when disassembling ACPI tables. Also fixed a couple of
1072 errors where a full 16-bit table type field was not extracted from the input
1075 acpisrc: Improve comment counting mechanism for generating source code
1076 statistics. Count first and last lines of multi-line comments as whitespace,
1077 not comment lines. Handle Linux legal header in addition to standard acpica
1080 ----------------------------------------
1082 29 July 2008. Summary of changes for version 20080729:
1084 1) ACPI CA Core Subsystem:
1086 Fix a possible deadlock in the GPE dispatch. Remove call to
1087 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
1088 to acquire the GPE lock but can deadlock since the GPE lock is already held
1089 at dispatch time. This code was introduced in version 20060831 as a response
1090 to Linux BZ 6881 and has since been removed from Linux.
1092 Add a function to dereference returned reference objects. Examines the return
1093 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
1094 automatically dereferenced in an attempt to return something useful (these
1095 reference types cannot be converted into an external ACPI_OBJECT.) Provides
1096 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
1098 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
1099 subtables for the MADT and one new subtable for the SRAT. Includes
1100 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
1101 Specification, June 2008.
1103 Additional error checking for pathname utilities. Add error check after all
1104 calls to AcpiNsGetPathnameLength. Add status return from
1105 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
1106 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
1108 Return status from the global init function AcpiUtGlobalInitialize. This is
1109 used by both the kernel subsystem and the utilities such as iASL compiler.
1110 The function could possibly fail when the caches are initialized. Yang Yi.
1112 Add a function to decode reference object types to strings. Created for
1113 improved error messages.
1115 Improve object conversion error messages. Better error messages during object
1116 conversion from internal to the external ACPI_OBJECT. Used for external calls
1117 to AcpiEvaluateObject.
1119 Example Code and Data Size: These are the sizes for the OS-independent
1120 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1121 debug version of the code includes the debug output trace mechanism and has a
1122 much larger code and data size.
1125 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1126 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1128 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1129 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1131 2) iASL Compiler/Disassembler and Tools:
1133 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
1134 introduced in version 20080701. If the object being evaluated (via execute
1135 command) is not a method, the debugger can hang while trying to obtain non-
1136 existent parameters.
1138 iASL: relax error for using reserved "_T_x" identifiers. These names can
1139 appear in a disassembled ASL file if they were emitted by the original
1140 compiler. Instead of issuing an error or warning and forcing the user to
1141 manually change these names, issue a remark instead.
1143 iASL: error if named object created in while loop. Emit an error if any named
1144 object is created within a While loop. If allowed, this code will generate a
1145 run-time error on the second iteration of the loop when an attempt is made to
1146 create the same named object twice. ACPICA bugzilla 730.
1148 iASL: Support absolute pathnames for include files. Add support for absolute
1149 pathnames within the Include operator. previously, only relative pathnames
1152 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
1153 The ACPI spec requires one interrupt minimum. BZ 423
1155 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
1156 Handles the case for the Interrupt Resource Descriptor where
1157 the ResourceSource argument is omitted but ResourceSourceIndex
1158 is present. Now leave room for the Index. BZ 426
1160 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
1161 where an error message is emitted if the target does not exist. BZ 516
1163 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
1164 (get ACPI tables on Windows). This was apparently broken in version 20070919.
1166 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
1167 the EOF happens immediately after the last table in the input file. Print
1168 completion message. Previously, no message was displayed in this case.
1170 ----------------------------------------
1171 01 July 2008. Summary of changes for version 20080701:
1173 0) Git source tree / acpica.org
1175 Fixed a problem where a git-clone from http would not transfer the entire
1178 1) ACPI CA Core Subsystem:
1180 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
1181 enable bit. Now performs a read-change-write of the enable register instead
1182 of simply writing out the cached enable mask. This will prevent inadvertent
1183 enabling of GPEs if a rogue GPE is received during initialization (before GPE
1184 handlers are installed.)
1186 Implemented a copy for dynamically loaded tables. Previously, dynamically
1187 loaded tables were simply mapped - but on some machines this memory is
1188 corrupted after suspend. Now copy the table to a local buffer. For the
1189 OpRegion case, added checksum verify. Use the table length from the table
1190 header, not the region length. For the Buffer case, use the table length
1191 also. Dennis Noordsij, Bob Moore. BZ 10734
1193 Fixed a problem where the same ACPI table could not be dynamically loaded and
1194 unloaded more than once. Without this change, a table cannot be loaded again
1195 once it has been loaded/unloaded one time. The current mechanism does not
1196 unregister a table upon an unload. During a load, if the same table is found,
1197 this no longer returns an exception. BZ 722
1199 Fixed a problem where the wrong descriptor length was calculated for the
1200 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
1201 are calculated as 12 bytes long, but the actual length in the internal
1202 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
1203 by Linn Crosetto. BZ 728
1205 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
1206 by Load() did not have its reference count decremented during unload, leading
1207 to a memory leak. Lin Ming. BZ 727
1209 Fixed a possible memory leak when deleting thermal/processor objects. Any
1210 associated notify handlers (and objects) were not being deleted. Fiodor
1213 Fixed the ordering of the ASCII names in the global mutex table to match the
1214 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
1215 Vegard Nossum. BZ 726
1217 Enhanced the AcpiGetObjectInfo interface to return the number of required
1218 arguments if the object is a control method. Added this call to the debugger
1219 so the proper number of default arguments are passed to a method. This
1220 prevents a warning when executing methods from AcpiExec.
1222 Added a check for an invalid handle in AcpiGetObjectInfo. Return
1223 AE_BAD_PARAMETER if input handle is invalid. BZ 474
1225 Fixed an extraneous warning from exconfig.c on the 64-bit build.
1227 Example Code and Data Size: These are the sizes for the OS-independent
1228 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1229 debug version of the code includes the debug output trace mechanism and has a
1230 much larger code and data size.
1233 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1234 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1236 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1237 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1239 2) iASL Compiler/Disassembler and Tools:
1241 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
1242 resource descriptor names.
1244 iASL: Detect invalid ASCII characters in input (windows version). Removed the
1245 "-CF" flag from the flex compile, enables correct detection of non-ASCII
1246 characters in the input. BZ 441
1248 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
1249 "result of operation not used" warning when the DDB handle returned from
1250 LoadTable is not used. The warning is not needed. BZ 590
1252 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
1253 pass address of table to the AML. Added option to disable OpRegion simulation
1254 to allow creation of an OpRegion with a real address that was passed to _CFG.
1255 All of this allows testing of the Load and Unload operators from AcpiExec.
1257 Debugger: update tables command for unloaded tables. Handle unloaded tables
1258 and use the standard table header output routine.
1260 ----------------------------------------
1261 09 June 2008. Summary of changes for version 20080609:
1263 1) ACPI CA Core Subsystem:
1265 Implemented a workaround for reversed _PRT entries. A significant number of
1266 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
1267 change dynamically detects and repairs this problem. Provides compatibility
1268 with MS ACPI. BZ 6859
1270 Simplified the internal ACPI hardware interfaces to eliminate the locking
1271 flag parameter from Register Read/Write. Added a new external interface,
1272 AcpiGetRegisterUnlocked.
1274 Fixed a problem where the invocation of a GPE control method could hang. This
1275 was a regression introduced in 20080514. The new method argument count
1276 validation mechanism can enter an infinite loop when a GPE method is
1277 dispatched. Problem fixed by removing the obsolete code that passed GPE block
1278 information to the notify handler via the control method parameter pointer.
1280 Fixed a problem where the _SST execution status was incorrectly returned to
1281 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
1282 20080514. _SST is optional and a NOT_FOUND exception should never be
1285 Fixed a problem where a deleted object could be accessed from within the AML
1286 parser. This was a regression introduced in version 20080123 as a fix for the
1287 Unload operator. Lin Ming. BZ 10669
1289 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
1290 and eliminated the use of a negative index in a loop. Operands are now
1291 displayed in the correct order, not backwards. This also fixes a regression
1292 introduced in 20080514 on 64-bit systems where the elimination of
1293 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
1295 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
1296 path did not delete a locally allocated structure.
1298 Updated definitions for the DMAR and SRAT tables to synchronize with the
1299 current specifications. Includes disassembler support.
1301 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
1302 loop termination value was used. Loop terminated on iteration early, missing
1303 one mutex. Linn Crosetto
1305 Example Code and Data Size: These are the sizes for the OS-independent
1306 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1307 debug version of the code includes the debug output trace mechanism and has a
1308 much larger code and data size.
1311 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1312 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1314 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1315 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1317 2) iASL Compiler/Disassembler and Tools:
1319 Disassembler: Implemented support for EisaId() within _CID objects. Now
1320 disassemble integer _CID objects back to EisaId invocations, including
1321 multiple integers within _CID packages. Includes single-step support for
1324 Disassembler: Added support for DMAR and SRAT table definition changes.
1326 ----------------------------------------
1327 14 May 2008. Summary of changes for version 20080514:
1329 1) ACPI CA Core Subsystem:
1331 Fixed a problem where GPEs were enabled too early during the ACPICA
1332 initialization. This could lead to "handler not installed" errors on some
1333 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
1334 ensures that all operation regions and devices throughout the namespace have
1335 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
1337 Implemented a change to the enter sleep code. Moved execution of the _GTS
1338 method to just before setting sleep enable bit. The execution was moved from
1339 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
1340 immediately before the SLP_EN bit is set, as per the ACPI specification.
1343 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
1344 the GPE, even if ACPICA thinks that that it is already disabled. It is
1345 possible that the AML or some other code has enabled the GPE unbeknownst to
1348 Fixed a problem with the Field operator where zero-length fields would return
1349 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
1350 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
1352 Implemented a fix for the Load operator, now load the table at the namespace
1353 root. This reverts a change introduced in version 20071019. The table is now
1354 loaded at the namespace root even though this goes against the ACPI
1355 specification. This provides compatibility with other ACPI implementations.
1356 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
1358 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
1359 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
1360 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
1361 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
1362 signatures, ACPICA must be compatible. BZ 10454.
1364 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
1365 fields to the exception string arrays to eliminate a -1 subtraction on the
1368 Updated the debug tracking macros to reduce overall code and data size.
1369 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
1370 instead of pointers to static strings. Jan Beulich and Bob Moore.
1372 Implemented argument count checking in control method invocation via
1373 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
1374 many. This applies only to extern programmatic control method execution, not
1375 method-to-method calls within the AML. Lin Ming.
1377 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
1378 longer needed, especially with the removal of 16-bit support. It was replaced
1379 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
1380 32/64-bit platforms is required.
1382 Added the C const qualifier for appropriate string constants -- mostly
1383 MODULE_NAME and printf format strings. Jan Beulich.
1385 Example Code and Data Size: These are the sizes for the OS-independent
1386 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1387 debug version of the code includes the debug output trace mechanism and has a
1388 much larger code and data size.
1391 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1392 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1394 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1395 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1397 2) iASL Compiler/Disassembler and Tools:
1399 Implemented ACPI table revision ID validation in the disassembler. Zero is
1400 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
1401 means 32-bit and this is unusual. 2 or greater is 64-bit.
1403 ----------------------------------------
1404 21 March 2008. Summary of changes for version 20080321:
1406 1) ACPI CA Core Subsystem:
1408 Implemented an additional change to the GPE support in order to suppress
1409 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
1410 disable incoming GPEs that are neither enabled nor disabled -- meaning that
1411 the GPE is unknown to the system. This should prevent future interrupt floods
1412 from that GPE. BZ 6217 (Zhang Rui)
1414 Fixed a problem where NULL package elements were not returned to the
1415 AcpiEvaluateObject interface correctly. The element was simply ignored
1416 instead of returning a NULL ACPI_OBJECT package element, potentially causing
1417 a buffer overflow and/or confusing the caller who expected a fixed number of
1418 elements. BZ 10132 (Lin Ming, Bob Moore)
1420 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
1421 Qword), Field, BankField, and IndexField operators when invoked from inside
1422 an executing control method. In this case, these operators created namespace
1423 nodes that were incorrectly left marked as permanent nodes instead of
1424 temporary nodes. This could cause a problem if there is race condition
1425 between an exiting control method and a running namespace walk. (Reported by
1428 Fixed a problem where the CreateField and CreateXXXField operators would
1429 incorrectly allow duplicate names (the name of the field) with no exception
1432 Implemented several changes for Notify handling. Added support for new Notify
1433 values (ACPI 2.0+) and improved the Notify debug output. Notify on
1434 PowerResource objects is no longer allowed, as per the ACPI specification.
1435 (Bob Moore, Zhang Rui)
1437 All Reference Objects returned via the AcpiEvaluateObject interface are now
1438 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
1439 NULL objects - either NULL package elements or unresolved named references.
1441 Fixed a problem where an extraneous debug message was produced for package
1442 objects (when debugging enabled). The message "Package List length larger
1443 than NumElements count" is now produced in the correct case, and is now an
1444 error message rather than a debug message. Added a debug message for the
1445 opposite case, where NumElements is larger than the Package List (the package
1446 will be padded out with NULL elements as per the ACPI spec.)
1448 Implemented several improvements for the output of the ASL "Debug" object to
1449 clarify and keep all data for a given object on one output line.
1451 Fixed two size calculation issues with the variable-length Start Dependent
1452 resource descriptor.
1454 Example Code and Data Size: These are the sizes for the OS-independent
1455 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1456 debug version of the code includes the debug output trace mechanism and has
1457 a much larger code and data size.
1460 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1461 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1463 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1464 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1466 2) iASL Compiler/Disassembler and Tools:
1468 Fixed a problem with the use of the Switch operator where execution of the
1469 containing method by multiple concurrent threads could cause an
1470 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
1471 actual Switch opcode, it must be simulated with local named temporary
1472 variables and if/else pairs. The solution chosen was to mark any method that
1473 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
1475 ----------------------------------------
1476 13 February 2008. Summary of changes for version 20080213:
1478 1) ACPI CA Core Subsystem:
1480 Implemented another MS compatibility design change for GPE/Notify handling.
1481 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
1482 complete first. It is expected that the OSL will queue the enable request
1483 behind all pending notify requests (may require changes to the local host OSL
1484 in AcpiOsExecute). Alexey Starikovskiy.
1486 Fixed a problem where buffer and package objects passed as arguments to a
1487 control method via the external AcpiEvaluateObject interface could cause an
1488 AE_AML_INTERNAL exception depending on the order and type of operators
1489 executed by the target control method.
1491 Fixed a problem where resource descriptor size optimization could cause a
1492 problem when a _CRS resource template is passed to a _SRS method. The _SRS
1493 resource template must use the same descriptors (with the same size) as
1494 returned from _CRS. This change affects the following resource descriptors:
1495 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
1497 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
1498 objects did not perform an implicit conversion as it should. These types must
1499 retain their initial type permanently as per the ACPI specification. However,
1500 a CopyObject to all other object types should not perform an implicit
1501 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
1503 Fixed a problem with the AcpiGetDevices interface where the mechanism to
1504 match device CIDs did not examine the entire list of available CIDs, but
1505 instead aborted on the first non-matching CID. Andrew Patterson.
1507 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
1508 inadvertently changed to return a 16-bit value instead of a 32-bit value,
1509 truncating the upper dword of a 64-bit value. This macro is only used to
1510 display debug output, so no incorrect calculations were made. Also,
1511 reimplemented the macro so that a 64-bit shift is not performed by
1512 inefficient compilers.
1514 Added missing va_end statements that should correspond with each va_start
1517 Example Code and Data Size: These are the sizes for the OS-independent
1518 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1519 debug version of the code includes the debug output trace mechanism and has
1520 a much larger code and data size.
1523 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1524 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1526 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1527 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1529 2) iASL Compiler/Disassembler and Tools:
1531 Implemented full disassembler support for the following new ACPI tables:
1532 BERT, EINJ, and ERST. Implemented partial disassembler support for the
1533 complicated HEST table. These tables support the Windows Hardware Error
1534 Architecture (WHEA).
1536 ----------------------------------------
1537 23 January 2008. Summary of changes for version 20080123:
1539 1) ACPI CA Core Subsystem:
1541 Added the 2008 copyright to all module headers and signons. This affects
1542 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1543 the tools/utilities.
1545 Fixed a problem with the SizeOf operator when used with Package and Buffer
1546 objects. These objects have deferred execution for some arguments, and the
1547 execution is now completed before the SizeOf is executed. This problem caused
1548 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
1551 Implemented an enhancement to the interpreter "slack mode". In the absence of
1552 an explicit return or an implicitly returned object from the last executed
1553 opcode, a control method will now implicitly return an integer of value 0 for
1554 Microsoft compatibility. (Lin Ming) BZ 392
1556 Fixed a problem with the Load operator where an exception was not returned in
1557 the case where the table is already loaded. (Lin Ming) BZ 463
1559 Implemented support for the use of DDBHandles as an Indexed Reference, as per
1560 the ACPI spec. (Lin Ming) BZ 486
1562 Implemented support for UserTerm (Method invocation) for the Unload operator
1563 as per the ACPI spec. (Lin Ming) BZ 580
1565 Fixed a problem with the LoadTable operator where the OemId and OemTableId
1566 input strings could cause unexpected failures if they were shorter than the
1567 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
1569 Implemented support for UserTerm (Method invocation) for the Unload operator
1570 as per the ACPI spec. (Lin Ming) BZ 580
1572 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
1573 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
1575 Example Code and Data Size: These are the sizes for the OS-independent
1576 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1577 debug version of the code includes the debug output trace mechanism and has
1578 a much larger code and data size.
1581 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1582 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1584 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1585 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1587 2) iASL Compiler/Disassembler and Tools:
1589 Implemented support in the disassembler for checksum validation on incoming
1590 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
1591 header dump at the start of the disassembly.
1593 Implemented additional debugging information in the namespace listing file
1594 created during compilation. In addition to the namespace hierarchy, the full
1595 pathname to each namespace object is displayed.
1597 Fixed a problem with the disassembler where invalid ACPI tables could cause
1598 faults or infinite loops.
1600 Fixed an unexpected parse error when using the optional "parameter types"
1601 list in a control method declaration. (Lin Ming) BZ 397
1603 Fixed a problem where two External declarations with the same name did not
1604 cause an error (Lin Ming) BZ 509
1606 Implemented support for full TermArgs (adding Argx, Localx and method
1607 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
1610 ----------------------------------------
1611 19 December 2007. Summary of changes for version 20071219:
1613 1) ACPI CA Core Subsystem:
1615 Implemented full support for deferred execution for the TermArg string
1616 arguments for DataTableRegion. This enables forward references and full
1617 operand resolution for the three string arguments. Similar to OperationRegion
1618 deferred argument execution.) Lin Ming. BZ 430
1620 Implemented full argument resolution support for the BankValue argument to
1621 BankField. Previously, only constants were supported, now any TermArg may be
1622 used. Lin Ming BZ 387, 393
1624 Fixed a problem with AcpiGetDevices where the search of a branch of the
1625 device tree could be terminated prematurely. In accordance with the ACPI
1626 specification, the search down the current branch is terminated if a device
1627 is both not present and not functional (instead of just not present.) Yakui
1630 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
1631 the underlying AML code changed the GPE enable registers. Now, any unknown
1632 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
1633 instead of simply ignored. Rui Zhang.
1635 Fixed a problem with Index Fields where the Index register was incorrectly
1636 limited to a maximum of 32 bits. Now any size may be used.
1638 Fixed a couple memory leaks associated with "implicit return" objects when
1639 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
1641 Example Code and Data Size: These are the sizes for the OS-independent
1642 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1643 debug version of the code includes the debug output trace mechanism and has
1644 a much larger code and data size.
1647 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1648 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1650 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1651 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1653 ----------------------------------------
1654 14 November 2007. Summary of changes for version 20071114:
1656 1) ACPI CA Core Subsystem:
1658 Implemented event counters for each of the Fixed Events, the ACPI SCI
1659 (interrupt) itself, and control methods executed. Named
1660 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
1661 should be useful for debugging and statistics.
1663 Implemented a new external interface, AcpiGetStatistics, to retrieve the
1664 contents of the various event counters. Returns the current values for
1665 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
1666 AcpiMethodCount. The interface can be expanded in the future if new counters
1667 are added. Device drivers should use this interface rather than access the
1670 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
1671 the ShortDivide function worked incorrectly, causing problems with the BCD
1672 functions with large input values. A truncation from 64-bit to 32-bit
1673 inadvertently occurred. Internal BZ 435. Lin Ming
1675 Fixed a problem with Index references passed as method arguments. References
1676 passed as arguments to control methods were dereferenced immediately (before
1677 control was passed to the called method). The references are now correctly
1678 passed directly to the called method. BZ 5389. Lin Ming
1680 Fixed a problem with CopyObject used in conjunction with the Index operator.
1681 The reference was incorrectly dereferenced before the copy. The reference is
1682 now correctly copied. BZ 5391. Lin Ming
1684 Fixed a problem with Control Method references within Package objects. These
1685 references are now correctly generated. This completes the package
1686 construction overhaul that began in version 20071019.
1688 Example Code and Data Size: These are the sizes for the OS-independent
1689 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1690 debug version of the code includes the debug output trace mechanism and has
1691 a much larger code and data size.
1694 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1695 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1697 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1698 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1701 2) iASL Compiler/Disassembler and Tools:
1703 The AcpiExec utility now installs handlers for all of the predefined
1704 Operation Region types. New types supported are: PCI_Config, CMOS, and
1707 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
1708 bit) address fields for the DSDT and FACS within the FADT were not being
1709 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
1712 ----------------------------------------
1713 19 October 2007. Summary of changes for version 20071019:
1715 1) ACPI CA Core Subsystem:
1717 Fixed a problem with the Alias operator when the target of the alias is a
1718 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
1719 Processor, and ThermalZone. In these cases, any children of the original
1720 operator could not be accessed via the alias, potentially causing unexpected
1721 AE_NOT_FOUND exceptions. (BZ 9067)
1723 Fixed a problem with the Package operator where all named references were
1724 created as object references and left otherwise unresolved. According to the
1725 ACPI specification, a Package can only contain Data Objects or references to
1726 control methods. The implication is that named references to Data Objects
1727 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
1728 immediately upon package creation. This is the approach taken with this
1729 change. References to all other named objects (Methods, Devices, Scopes,
1730 etc.) are all now properly created as reference objects. (BZ 5328)
1732 Reverted a change to Notify handling that was introduced in version
1733 20070508. This version changed the Notify handling from asynchronous to
1734 fully synchronous (Device driver Notify handling with respect to the Notify
1735 ASL operator). It was found that this change caused more problems than it
1736 solved and was removed by most users.
1738 Fixed a problem with the Increment and Decrement operators where the type of
1739 the target object could be unexpectedly and incorrectly changed. (BZ 353)
1742 Fixed a problem with the Load and LoadTable operators where the table
1743 location within the namespace was ignored. Instead, the table was always
1744 loaded into the root or current scope. Lin Ming.
1746 Fixed a problem with the Load operator when loading a table from a buffer
1747 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
1749 Fixed a problem with the Debug object where a store of a DdbHandle reference
1750 object to the Debug object could cause a fault.
1752 Added a table checksum verification for the Load operator, in the case where
1753 the load is from a buffer. (BZ 578).
1755 Implemented additional parameter validation for the LoadTable operator. The
1756 length of the input strings SignatureString, OemIdString, and OemTableId are
1757 now checked for maximum lengths. (BZ 582) Lin Ming.
1759 Example Code and Data Size: These are the sizes for the OS-independent
1760 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1761 debug version of the code includes the debug output trace mechanism and has
1762 a much larger code and data size.
1765 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1766 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1768 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1769 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1772 2) iASL Compiler/Disassembler:
1774 Fixed a problem where if a single file was specified and the file did not
1775 exist, no error message was emitted. (Introduced with wildcard support in
1778 ----------------------------------------
1779 19 September 2007. Summary of changes for version 20070919:
1781 1) ACPI CA Core Subsystem:
1783 Designed and implemented new external interfaces to install and remove
1784 handlers for ACPI table-related events. Current events that are defined are
1785 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
1786 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
1787 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
1789 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
1790 (acpi_serialized option on Linux) could cause some systems to hang during
1791 initialization. (Bob Moore) BZ 8171
1793 Fixed a problem where objects of certain types (Device, ThermalZone,
1794 Processor, PowerResource) can be not found if they are declared and
1795 referenced from within the same control method (Lin Ming) BZ 341
1797 Example Code and Data Size: These are the sizes for the OS-independent
1798 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1799 debug version of the code includes the debug output trace mechanism and has
1800 a much larger code and data size.
1803 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1804 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1806 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1807 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1810 2) iASL Compiler/Disassembler:
1812 Implemented support to allow multiple files to be compiled/disassembled in a
1813 single invocation. This includes command line wildcard support for both the
1814 Windows and Unix versions of the compiler. This feature simplifies the
1815 disassembly and compilation of multiple ACPI tables in a single directory.
1817 ----------------------------------------
1818 08 May 2007. Summary of changes for version 20070508:
1820 1) ACPI CA Core Subsystem:
1822 Implemented a Microsoft compatibility design change for the handling of the
1823 Notify AML operator. Previously, notify handlers were dispatched and
1824 executed completely asynchronously in a deferred thread. The new design
1825 still executes the notify handlers in a different thread, but the original
1826 thread that executed the Notify() now waits at a synchronization point for
1827 the notify handler to complete. Some machines depend on a synchronous Notify
1828 operator in order to operate correctly.
1830 Implemented support to allow Package objects to be passed as method
1831 arguments to the external AcpiEvaluateObject interface. Previously, this
1832 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
1833 implemented since there were no reserved control methods that required it
1836 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
1837 contained invalid non-zero values in reserved fields could cause later
1838 failures because these fields have meaning in later revisions of the FADT.
1839 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
1840 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
1842 Fixed a problem where the Global Lock handle was not properly updated if a
1843 thread that acquired the Global Lock via executing AML code then attempted
1844 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
1847 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
1848 could be corrupted if the interrupt being removed was at the head of the
1849 list. Reported by Linn Crosetto.
1851 Example Code and Data Size: These are the sizes for the OS-independent
1852 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1853 debug version of the code includes the debug output trace mechanism and has
1854 a much larger code and data size.
1857 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1858 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1860 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1861 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1863 ----------------------------------------
1864 20 March 2007. Summary of changes for version 20070320:
1866 1) ACPI CA Core Subsystem:
1868 Implemented a change to the order of interpretation and evaluation of AML
1869 operand objects within the AML interpreter. The interpreter now evaluates
1870 operands in the order that they appear in the AML stream (and the
1871 corresponding ASL code), instead of in the reverse order (after the entire
1872 operand list has been parsed). The previous behavior caused several subtle
1873 incompatibilities with the Microsoft AML interpreter as well as being
1874 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
1876 Implemented a change to the ACPI Global Lock support. All interfaces to the
1877 global lock now allow the same thread to acquire the lock multiple times.
1878 This affects the AcpiAcquireGlobalLock external interface to the global lock
1879 as well as the internal use of the global lock to support AML fields -- a
1880 control method that is holding the global lock can now simultaneously access
1881 AML fields that require global lock protection. Previously, in both cases,
1882 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
1883 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
1884 Controller. There is no change to the behavior of the AML Acquire operator,
1885 as this can already be used to acquire a mutex multiple times by the same
1886 thread. BZ 8066. With assistance from Alexey Starikovskiy.
1888 Fixed a problem where invalid objects could be referenced in the AML
1889 Interpreter after error conditions. During operand evaluation, ensure that
1890 the internal "Return Object" field is cleared on error and only valid
1891 pointers are stored there. Caused occasional access to deleted objects that
1892 resulted in "large reference count" warning messages. Valery Podrezov.
1894 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
1895 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
1898 Fixed an internal problem with the handling of result objects on the
1899 interpreter result stack. BZ 7872. Valery Podrezov.
1901 Removed obsolete code that handled the case where AML_NAME_OP is the target
1902 of a reference (Reference.Opcode). This code was no longer necessary. BZ
1903 7874. Valery Podrezov.
1905 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
1906 remnant from the previously discontinued 16-bit support.
1908 Example Code and Data Size: These are the sizes for the OS-independent
1909 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1910 debug version of the code includes the debug output trace mechanism and has
1911 a much larger code and data size.
1914 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1915 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1917 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1918 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1920 ----------------------------------------
1921 26 January 2007. Summary of changes for version 20070126:
1923 1) ACPI CA Core Subsystem:
1925 Added the 2007 copyright to all module headers and signons. This affects
1926 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1929 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
1930 during a table load. A bad pointer was passed in the case where the DSDT is
1931 overridden, causing a fault in this case.
1933 Example Code and Data Size: These are the sizes for the OS-independent
1934 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1935 debug version of the code includes the debug output trace mechanism and has
1936 a much larger code and data size.
1939 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1940 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1942 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1943 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1945 ----------------------------------------
1946 15 December 2006. Summary of changes for version 20061215:
1948 1) ACPI CA Core Subsystem:
1950 Support for 16-bit ACPICA has been completely removed since it is no longer
1951 necessary and it clutters the code. All 16-bit macros, types, and
1952 conditional compiles have been removed, cleaning up and simplifying the code
1953 across the entire subsystem. DOS support is no longer needed since the
1954 bootable Linux firmware kit is now available.
1956 The handler for the Global Lock is now removed during AcpiTerminate to
1957 enable a clean subsystem restart, via the implementation of the
1958 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
1961 Implemented enhancements to the multithreading support within the debugger
1962 to enable improved multithreading debugging and evaluation of the subsystem.
1965 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
1966 memory used during the execution, as well as the maximum memory consumed by
1967 each of the various object types. (Valery Podrezov)
1969 Example Code and Data Size: These are the sizes for the OS-independent
1970 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1971 debug version of the code includes the debug output trace mechanism and has
1972 a much larger code and data size.
1975 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1976 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1978 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1979 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1982 2) iASL Compiler/Disassembler and Tools:
1984 AcpiExec: Implemented a new option (-m) to display full memory use
1985 statistics upon subsystem/program termination. (Valery Podrezov)
1987 ----------------------------------------
1988 09 November 2006. Summary of changes for version 20061109:
1990 1) ACPI CA Core Subsystem:
1992 Optimized the Load ASL operator in the case where the source operand is an
1993 operation region. Simply map the operation region memory, instead of
1994 performing a bytewise read. (Region must be of type SystemMemory, see
1997 Fixed the Load ASL operator for the case where the source operand is a
1998 region field. A buffer object is also allowed as the source operand. BZ 480
2000 Fixed a problem where the Load ASL operator allowed the source operand to be
2001 an operation region of any type. It is now restricted to regions of type
2002 SystemMemory, as per the ACPI specification. BZ 481
2004 Additional cleanup and optimizations for the new Table Manager code.
2006 AcpiEnable will now fail if all of the required ACPI tables are not loaded
2007 (FADT, FACS, DSDT). BZ 477
2009 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
2010 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
2011 manually optimized to be aligned and will not work if it is byte-packed.
2013 Example Code and Data Size: These are the sizes for the OS-independent
2014 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2015 debug version of the code includes the debug output trace mechanism and has
2016 a much larger code and data size.
2019 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2020 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2022 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
2023 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
2026 2) iASL Compiler/Disassembler and Tools:
2028 Fixed a problem where the presence of the _OSI predefined control method
2029 within complex expressions could cause an internal compiler error.
2031 AcpiExec: Implemented full region support for multiple address spaces.
2032 SpaceId is now part of the REGION object. BZ 429
2034 ----------------------------------------
2035 11 October 2006. Summary of changes for version 20061011:
2037 1) ACPI CA Core Subsystem:
2039 Completed an AML interpreter performance enhancement for control method
2040 execution. Previously a 2-pass parse/execution, control methods are now
2041 completely parsed and executed in a single pass. This improves overall
2042 interpreter performance by ~25%, reduces code size, and reduces CPU stack
2043 use. (Valery Podrezov + interpreter changes in version 20051202 that
2044 eliminated namespace loading during the pass one parse.)
2046 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
2047 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
2048 obtained and also checked for an ID match.
2050 Implemented additional support for the PCI _ADR execution: upsearch until a
2051 device scope is found before executing _ADR. This allows PCI_Config
2052 operation regions to be declared locally within control methods underneath
2055 Fixed a problem with a possible race condition between threads executing
2056 AcpiWalkNamespace and the AML interpreter. This condition was removed by
2057 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
2058 entries created during any concurrent control method execution. An
2059 additional namespace race condition is known to exist between
2060 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
2063 Restructured the AML ParseLoop function, breaking it into several
2064 subfunctions in order to reduce CPU stack use and improve maintainability.
2067 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
2068 of prefix handle and pathname. BZ 478
2070 Example Code and Data Size: These are the sizes for the OS-independent
2071 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2072 debug version of the code includes the debug output trace mechanism and has
2073 a much larger code and data size.
2076 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2077 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2079 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2080 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2082 2) iASL Compiler/Disassembler and Tools:
2084 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
2085 to restore original behavior.
2087 ----------------------------------------
2088 27 September 2006. Summary of changes for version 20060927:
2090 1) ACPI CA Core Subsystem:
2092 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
2093 These functions now use a spinlock for mutual exclusion and the interrupt
2094 level indication flag is not needed.
2096 Fixed a problem with the Global Lock where the lock could appear to be
2097 obtained before it is actually obtained. The global lock semaphore was
2098 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
2101 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
2102 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
2104 Example Code and Data Size: These are the sizes for the OS-independent
2105 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2106 debug version of the code includes the debug output trace mechanism and has
2107 a much larger code and data size.
2110 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2111 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2113 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2114 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2117 2) iASL Compiler/Disassembler and Tools:
2119 Fixed a compilation problem with the pre-defined Resource Descriptor field
2120 names where an "object does not exist" error could be incorrectly generated
2121 if the parent ResourceTemplate pathname places the template within a
2122 different namespace scope than the current scope. (BZ 7212)
2124 Fixed a problem where the compiler could hang after syntax errors detected
2125 in an ElseIf construct. (BZ 453)
2127 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
2128 operator. An incorrect output filename was produced when this parameter was
2129 a null string (""). Now, the original input filename is used as the AML
2130 output filename, with an ".aml" extension.
2132 Implemented a generic batch command mode for the AcpiExec utility (execute
2133 any AML debugger command) (Valery Podrezov).
2135 ----------------------------------------
2136 12 September 2006. Summary of changes for version 20060912:
2138 1) ACPI CA Core Subsystem:
2140 Enhanced the implementation of the "serialized mode" of the interpreter
2141 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
2142 specified, instead of creating a serialization semaphore per control method,
2143 the interpreter lock is simply no longer released before a blocking
2144 operation during control method execution. This effectively makes the AML
2145 Interpreter single-threaded. The overhead of a semaphore per-method is
2148 Fixed a regression where an error was no longer emitted if a control method
2149 attempts to create 2 objects of the same name. This once again returns
2150 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
2151 will dynamically serialize the control method to possible prevent future
2154 Integrated a fix for a problem with PCI Express HID detection in the PCI
2155 Config Space setup procedure. (BZ 7145)
2157 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
2158 AcpiHwInitialize function - the FADT registers are now validated when the
2161 Added two new warnings during FADT verification - 1) if the FADT is larger
2162 than the largest known FADT version, and 2) if there is a mismatch between a
2163 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
2165 Example Code and Data Size: These are the sizes for the OS-independent
2166 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2167 debug version of the code includes the debug output trace mechanism and has
2168 a much larger code and data size.
2171 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2172 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2174 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2175 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2178 2) iASL Compiler/Disassembler and Tools:
2180 Fixed a problem with the implementation of the Switch() operator where the
2181 temporary variable was declared too close to the actual Switch, instead of
2182 at method level. This could cause a problem if the Switch() operator is
2183 within a while loop, causing an error on the second iteration. (BZ 460)
2185 Disassembler - fix for error emitted for unknown type for target of scope
2186 operator. Now, ignore it and continue.
2188 Disassembly of an FADT now verifies the input FADT and reports any errors
2189 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
2191 Disassembly of raw data buffers with byte initialization data now prefixes
2192 each output line with the current buffer offset.
2194 Disassembly of ASF! table now includes all variable-length data fields at
2195 the end of some of the subtables.
2197 The disassembler now emits a comment if a buffer appears to be a
2198 ResourceTemplate, but cannot be disassembled as such because the EndTag does
2199 not appear at the very end of the buffer.
2201 AcpiExec - Added the "-t" command line option to enable the serialized mode
2202 of the AML interpreter.
2204 ----------------------------------------
2205 31 August 2006. Summary of changes for version 20060831:
2207 1) ACPI CA Core Subsystem:
2209 Miscellaneous fixes for the Table Manager:
2210 - Correctly initialize internal common FADT for all 64-bit "X" fields
2211 - Fixed a couple table mapping issues during table load
2212 - Fixed a couple alignment issues for IA64
2213 - Initialize input array to zero in AcpiInitializeTables
2214 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
2217 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
2218 immediately disabled to prevent the waking GPE from firing again and to
2219 prevent other wake GPEs from interrupting the wake process.
2221 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
2222 be used for debugging systems with a large number of ACPI interrupts.
2224 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
2225 both the ACPICA headers and the disassembler.
2227 Example Code and Data Size: These are the sizes for the OS-independent
2228 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2229 debug version of the code includes the debug output trace mechanism and has
2230 a much larger code and data size.
2233 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2234 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2236 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2237 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2240 2) iASL Compiler/Disassembler and Tools:
2242 Disassembler support for the DMAR ACPI table.
2244 ----------------------------------------
2245 23 August 2006. Summary of changes for version 20060823:
2247 1) ACPI CA Core Subsystem:
2249 The Table Manager component has been completely redesigned and
2250 reimplemented. The new design is much simpler, and reduces the overall code
2251 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
2252 now possible to obtain the ACPI tables very early during kernel
2253 initialization, even before dynamic memory management is initialized.
2254 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
2256 Obsolete ACPICA interfaces:
2258 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
2260 - AcpiLoadTable: Not needed.
2261 - AcpiUnloadTable: Not needed.
2263 New ACPICA interfaces:
2265 - AcpiInitializeTables: Must be called before the table manager can be used.
2266 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
2267 allocated memory after it becomes available.
2268 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
2271 Other ACPICA changes:
2273 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
2274 AcpiOsUnmapMemory to free this mapping.
2275 - AcpiGetTable returns the actual mapped table. The mapping is managed
2276 internally and must not be deleted by the caller. Use of this interface
2277 causes no additional dynamic memory allocation.
2278 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
2279 it appeared to be unused.
2280 - The interface to AcpiOsMapMemory has changed to be consistent with the
2281 other allocation interfaces.
2282 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
2284 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
2285 bit platforms. Was previously 64 bits on all platforms.
2286 - The interface to the ACPI Global Lock acquire/release macros have changed
2287 slightly since ACPICA no longer keeps a local copy of the FACS with a
2288 constructed pointer to the actual global lock.
2290 Porting to the new table manager:
2292 - AcpiInitializeTables: Must be called once, and can be called anytime
2293 during the OS initialization process. It allows the host to specify an area
2294 of memory to be used to store the internal version of the RSDT/XSDT (root
2295 table). This allows the host to access ACPI tables before memory management
2296 is initialized and running.
2297 - AcpiReallocateRootTable: Can be called after memory management is running
2298 to copy the root table to a dynamically allocated array, freeing up the
2299 scratch memory specified in the call to AcpiInitializeTables.
2300 - AcpiSubsystemInitialize: This existing interface is independent of the
2301 Table Manager, and does not have to be called before the Table Manager can
2302 be used, it only must be called before the rest of ACPICA can be used.
2303 - ACPI Tables: Some changes have been made to the names and structure of the
2304 actbl.h and actbl1.h header files and may require changes to existing code.
2305 For example, bitfields have been completely removed because of their lack of
2306 portability across C compilers.
2307 - Update interfaces to the Global Lock acquire/release macros if local
2308 versions are used. (see acwin.h)
2310 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
2314 Example Code and Data Size: These are the sizes for the OS-independent
2315 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2316 debug version of the code includes the debug output trace mechanism and has
2317 a much larger code and data size.
2320 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2321 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2323 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2324 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2327 2) iASL Compiler/Disassembler and Tools:
2329 No changes for this release.
2331 ----------------------------------------
2332 21 July 2006. Summary of changes for version 20060721:
2334 1) ACPI CA Core Subsystem:
2336 The full source code for the ASL test suite used to validate the iASL
2337 compiler and the ACPICA core subsystem is being released with the ACPICA
2338 source for the first time. The source is contained in a separate package and
2339 consists of over 1100 files that exercise all ASL/AML operators. The package
2340 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
2343 Completed a new design and implementation for support of the ACPI Global
2344 Lock. On the OS side, the global lock is now treated as a standard AML
2345 mutex. Previously, multiple OS threads could "acquire" the global lock
2346 simultaneously. However, this could cause the BIOS to be starved out of the
2347 lock - especially in cases such as the Embedded Controller driver where
2348 there is a tight coupling between the OS and the BIOS.
2350 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
2351 The Global Lock interrupt handler no longer queues the execution of a
2352 separate thread to signal the global lock semaphore. Instead, the semaphore
2353 is signaled directly from the interrupt handler.
2355 Implemented support within the AML interpreter for package objects that
2356 contain a larger AML length (package list length) than the package element
2357 count. In this case, the length of the package is truncated to match the
2358 package element count. Some BIOS code apparently modifies the package length
2359 on the fly, and this change supports this behavior. Provides compatibility
2360 with the MS AML interpreter. (With assistance from Fiodor Suietov)
2362 Implemented a temporary fix for the BankValue parameter of a Bank Field to
2363 support all constant values, now including the Zero and One opcodes.
2364 Evaluation of this parameter must eventually be converted to a full TermArg
2365 evaluation. A not-implemented error is now returned (temporarily) for non-
2366 constant values for this parameter.
2368 Fixed problem reports (Fiodor Suietov) integrated:
2369 - Fix for premature object deletion after CopyObject on Operation Region (BZ
2372 Example Code and Data Size: These are the sizes for the OS-independent
2373 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2374 debug version of the code includes the debug output trace mechanism and has
2375 a much larger code and data size.
2378 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
2379 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
2381 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2382 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2385 2) iASL Compiler/Disassembler and Tools:
2387 No changes for this release.
2389 ----------------------------------------
2390 07 July 2006. Summary of changes for version 20060707:
2392 1) ACPI CA Core Subsystem:
2394 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
2395 that do not allow the initialization of address pointers within packed
2396 structures - even though the hardware itself may support misaligned
2397 transfers. Some of the debug data structures are packed by default to
2400 Added an error message for the case where AcpiOsGetThreadId() returns zero.
2401 A non-zero value is required by the core ACPICA code to ensure the proper
2402 operation of AML mutexes and recursive control methods.
2404 The DSDT is now the only ACPI table that determines whether the AML
2405 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
2406 the hooks for per-table 32/64 switching have been removed from the code. A
2407 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
2409 Fixed a possible leak of an OwnerID in the error path of
2410 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
2411 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
2412 when using the AcpiTbDeleteTablesByType interface (with assistance from
2415 Fixed a problem with Serialized control methods where the semaphore
2416 associated with the method could be over-signaled after multiple method
2419 Fixed two issues with the locking of the internal namespace data structure.
2420 Both the Unload() operator and AcpiUnloadTable interface now lock the
2421 namespace during the namespace deletion associated with the table unload
2422 (with assistance from Linn Crosetto.)
2424 Fixed problem reports (Valery Podrezov) integrated:
2425 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
2427 Fixed problem reports (Fiodor Suietov) integrated:
2428 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
2429 - On Address Space handler deletion, needless deactivation call (BZ 374)
2430 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
2431 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
2433 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
2434 - Minimum Length of RSDT should be validated (BZ 379)
2435 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
2437 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
2440 Example Code and Data Size: These are the sizes for the OS-independent
2441 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2442 debug version of the code includes the debug output trace mechanism and has
2443 a much larger code and data size.
2446 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2447 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2449 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2450 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2453 2) iASL Compiler/Disassembler and Tools:
2455 Fixed problem reports:
2456 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2459 ----------------------------------------
2460 23 June 2006. Summary of changes for version 20060623:
2462 1) ACPI CA Core Subsystem:
2464 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
2465 allows the type to be customized to the host OS for improved efficiency
2466 (since a spinlock is usually a very small object.)
2468 Implemented support for "ignored" bits in the ACPI registers. According to
2469 the ACPI specification, these bits should be preserved when writing the
2470 registers via a read/modify/write cycle. There are 3 bits preserved in this
2471 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
2473 Implemented the initial deployment of new OSL mutex interfaces. Since some
2474 host operating systems have separate mutex and semaphore objects, this
2475 feature was requested. The base code now uses mutexes (and the new mutex
2476 interfaces) wherever a binary semaphore was used previously. However, for
2477 the current release, the mutex interfaces are defined as macros to map them
2478 to the existing semaphore interfaces. Therefore, no OSL changes are required
2479 at this time. (See acpiosxf.h)
2481 Fixed several problems with the support for the control method SyncLevel
2482 parameter. The SyncLevel now works according to the ACPI specification and
2483 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
2484 is a property of the executing thread. Mutual exclusion for control methods
2485 is now implemented with a mutex instead of a semaphore.
2487 Fixed three instances of the use of the C shift operator in the bitfield
2488 support code (exfldio.c) to avoid the use of a shift value larger than the
2489 target data width. The behavior of C compilers is undefined in this case and
2490 can cause unpredictable results, and therefore the case must be detected and
2491 avoided. (Fiodor Suietov)
2493 Added an info message whenever an SSDT or OEM table is loaded dynamically
2494 via the Load() or LoadTable() ASL operators. This should improve debugging
2495 capability since it will show exactly what tables have been loaded (beyond
2496 the tables present in the RSDT/XSDT.)
2498 Example Code and Data Size: These are the sizes for the OS-independent
2499 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2500 debug version of the code includes the debug output trace mechanism and has
2501 a much larger code and data size.
2504 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2505 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2507 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2508 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2511 2) iASL Compiler/Disassembler and Tools:
2513 No changes for this release.
2515 ----------------------------------------
2516 08 June 2006. Summary of changes for version 20060608:
2518 1) ACPI CA Core Subsystem:
2520 Converted the locking mutex used for the ACPI hardware to a spinlock. This
2521 change should eliminate all problems caused by attempting to acquire a
2522 semaphore at interrupt level, and it means that all ACPICA external
2523 interfaces that directly access the ACPI hardware can be safely called from
2524 interrupt level. OSL code that implements the semaphore interfaces should be
2525 able to eliminate any workarounds for being called at interrupt level.
2527 Fixed a regression introduced in 20060526 where the ACPI device
2528 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
2529 did not have an optional _INI method.
2531 Fixed an IndexField issue where a write to the Data Register should be
2532 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
2535 Fixed problem reports (Valery Podrezov) integrated:
2536 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
2538 Fixed problem reports (Fiodor Suietov) integrated:
2539 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
2541 Removed four global mutexes that were obsolete and were no longer being
2544 Example Code and Data Size: These are the sizes for the OS-independent
2545 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2546 debug version of the code includes the debug output trace mechanism and has
2547 a much larger code and data size.
2550 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2551 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2553 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2554 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2557 2) iASL Compiler/Disassembler and Tools:
2559 Fixed a fault when using -g option (get tables from registry) on Windows
2562 Fixed problem reports integrated:
2563 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
2564 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
2566 - Global table revision override (-r) is ignored (BZ 413)
2568 ----------------------------------------
2569 26 May 2006. Summary of changes for version 20060526:
2571 1) ACPI CA Core Subsystem:
2573 Restructured, flattened, and simplified the internal interfaces for
2574 namespace object evaluation - resulting in smaller code, less CPU stack use,
2575 and fewer interfaces. (With assistance from Mikhail Kouzmich)
2577 Fixed a problem with the CopyObject operator where the first parameter was
2578 not typed correctly for the parser, interpreter, compiler, and disassembler.
2579 Caused various errors and unexpected behavior.
2581 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
2582 produced incorrect results with some C compilers. Since the behavior of C
2583 compilers when the shift value is larger than the datatype width is
2584 apparently not well defined, the interpreter now detects this condition and
2585 simply returns zero as expected in all such cases. (BZ 395)
2587 Fixed problem reports (Valery Podrezov) integrated:
2588 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
2589 - Allow interpreter to handle nested method declarations (BZ 5361)
2591 Fixed problem reports (Fiodor Suietov) integrated:
2592 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
2593 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
2594 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
2595 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
2596 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
2597 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
2598 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
2599 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
2600 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
2601 - Status of the Global Initialization Handler call not used (BZ 366)
2602 - Incorrect object parameter to Global Initialization Handler (BZ 367)
2604 Example Code and Data Size: These are the sizes for the OS-independent
2605 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2606 debug version of the code includes the debug output trace mechanism and has
2607 a much larger code and data size.
2610 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2611 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2613 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2614 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2617 2) iASL Compiler/Disassembler and Tools:
2619 Modified the parser to allow the names IO, DMA, and IRQ to be used as
2620 namespace identifiers with no collision with existing resource descriptor
2621 macro names. This provides compatibility with other ASL compilers and is
2622 most useful for disassembly/recompilation of existing tables without parse
2623 errors. (With assistance from Thomas Renninger)
2625 Disassembler: fixed an incorrect disassembly problem with the
2626 DataTableRegion and CopyObject operators. Fixed a possible fault during
2627 disassembly of some Alias operators.
2629 ----------------------------------------
2630 12 May 2006. Summary of changes for version 20060512:
2632 1) ACPI CA Core Subsystem:
2634 Replaced the AcpiOsQueueForExecution interface with a new interface named
2635 AcpiOsExecute. The major difference is that the new interface does not have
2636 a Priority parameter, this appeared to be useless and has been replaced by a
2637 Type parameter. The Type tells the host what type of execution is being
2638 requested, such as global lock handler, notify handler, GPE handler, etc.
2639 This allows the host to queue and execute the request as appropriate for the
2640 request type, possibly using different work queues and different priorities
2641 for the various request types. This enables fixes for multithreading
2642 deadlock problems such as BZ #5534, and will require changes to all existing
2643 OS interface layers. (Alexey Starikovskiy and Bob Moore)
2645 Fixed a possible memory leak associated with the support for the so-called
2646 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
2649 Fixed a problem with the Load() operator where a table load from an
2650 operation region could overwrite an internal table buffer by up to 7 bytes
2651 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
2653 Example Code and Data Size: These are the sizes for the OS-independent
2654 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2655 debug version of the code includes the debug output trace mechanism and has
2656 a much larger code and data size.
2659 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2660 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2662 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2663 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2667 2) iASL Compiler/Disassembler and Tools:
2669 Disassembler: Implemented support to cross reference the internal namespace
2670 and automatically generate ASL External() statements for symbols not defined
2671 within the current table being disassembled. This will simplify the
2672 disassembly and recompilation of interdependent tables such as SSDTs since
2673 these statements will no longer have to be added manually.
2675 Disassembler: Implemented experimental support to automatically detect
2676 invocations of external control methods and generate appropriate External()
2677 statements. This is problematic because the AML cannot be correctly parsed
2678 until the number of arguments for each control method is known. Currently,
2679 standalone method invocations and invocations as the source operand of a
2680 Store() statement are supported.
2682 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
2683 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
2684 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
2685 more readable and likely closer to the original ASL source.
2687 ----------------------------------------
2688 21 April 2006. Summary of changes for version 20060421:
2690 1) ACPI CA Core Subsystem:
2692 Removed a device initialization optimization introduced in 20051216 where
2693 the _STA method was not run unless an _INI was also present for the same
2694 device. This optimization could cause problems because it could allow _INI
2695 methods to be run within a not-present device subtree. (If a not-present
2696 device had no _INI, _STA would not be run, the not-present status would not
2697 be discovered, and the children of the device would be incorrectly
2700 Implemented a new _STA optimization where namespace subtrees that do not
2701 contain _INI are identified and ignored during device initialization.
2702 Selectively running _STA can significantly improve boot time on large
2703 machines (with assistance from Len Brown.)
2705 Implemented support for the device initialization case where the returned
2706 _STA flags indicate a device not-present but functioning. In this case, _INI
2707 is not run, but the device children are examined for presence, as per the
2710 Implemented an additional change to the IndexField support in order to
2711 conform to MS behavior. The value written to the Index Register is not
2712 simply a byte offset, it is a byte offset in units of the access width of
2713 the parent Index Field. (Fiodor Suietov)
2715 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
2716 interface is called during the creation of all AML operation regions, and
2717 allows the host OS to exert control over what addresses it will allow the
2718 AML code to access. Operation Regions whose addresses are disallowed will
2719 cause a runtime exception when they are actually accessed (will not affect
2720 or abort table loading.) See oswinxf or osunixxf for an example
2723 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
2724 interface allows the host OS to match the various "optional"
2725 interface/behavior strings for the _OSI predefined control method as
2726 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
2727 for an example implementation.
2729 Restructured and corrected various problems in the exception handling code
2730 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
2731 (with assistance from Takayoshi Kochi.)
2733 Modified the Linux source converter to ignore quoted string literals while
2734 converting identifiers from mixed to lower case. This will correct problems
2735 with the disassembler and other areas where such strings must not be
2738 The ACPI_FUNCTION_* macros no longer require quotes around the function
2739 name. This allows the Linux source converter to convert the names, now that
2740 the converter ignores quoted strings.
2742 Example Code and Data Size: These are the sizes for the OS-independent
2743 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2744 debug version of the code includes the debug output trace mechanism and has
2745 a much larger code and data size.
2749 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2750 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2752 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2753 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2756 2) iASL Compiler/Disassembler and Tools:
2758 Implemented 3 new warnings for iASL, and implemented multiple warning levels
2761 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
2762 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
2763 check for the possible timeout, a warning is issued.
2765 2) Useless operators: If an ASL operator does not specify an optional target
2766 operand and it also does not use the function return value from the
2767 operator, a warning is issued since the operator effectively does nothing.
2769 3) Unreferenced objects: If a namespace object is created, but never
2770 referenced, a warning is issued. This is a warning level 2 since there are
2771 cases where this is ok, such as when a secondary table is loaded that uses
2772 the unreferenced objects. Even so, care is taken to only flag objects that
2773 don't look like they will ever be used. For example, the reserved methods
2774 (starting with an underscore) are usually not referenced because it is
2775 expected that the OS will invoke them.
2777 ----------------------------------------
2778 31 March 2006. Summary of changes for version 20060331:
2780 1) ACPI CA Core Subsystem:
2782 Implemented header file support for the following additional ACPI tables:
2783 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
2784 all current and known ACPI tables are now defined in the ACPICA headers and
2785 are available for use by device drivers and other software.
2787 Implemented support to allow tables that contain ACPI names with invalid
2788 characters to be loaded. Previously, this would cause the table load to
2789 fail, but since there are several known cases of such tables on existing
2790 machines, this change was made to enable ACPI support for them. Also, this
2791 matches the behavior of the Microsoft ACPI implementation.
2793 Fixed a couple regressions introduced during the memory optimization in the
2794 20060317 release. The namespace node definition required additional
2795 reorganization and an internal datatype that had been changed to 8-bit was
2796 restored to 32-bit. (Valery Podrezov)
2798 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
2799 could be passed through to AcpiOsReleaseObject which is unexpected. Such
2800 null pointers are now trapped and ignored, matching the behavior of the
2801 previous implementation before the deployment of AcpiOsReleaseObject.
2802 (Valery Podrezov, Fiodor Suietov)
2804 Fixed a memory mapping leak during the deletion of a SystemMemory operation
2805 region where a cached memory mapping was not deleted. This became a
2806 noticeable problem for operation regions that are defined within frequently
2807 used control methods. (Dana Meyers)
2809 Reorganized the ACPI table header files into two main files: one for the
2810 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
2811 ACPI tables that are consumed by the drivers and other software. The various
2812 FADT definitions were merged into one common section and three different
2813 tables (ACPI 1.0, 1.0+, and 2.0)
2815 Example Code and Data Size: These are the sizes for the OS-independent
2816 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2817 debug version of the code includes the debug output trace mechanism and has
2818 a much larger code and data size.
2821 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2822 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2824 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2825 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2828 2) iASL Compiler/Disassembler and Tools:
2830 Disassembler: Implemented support to decode and format all non-AML ACPI
2831 tables (tables other than DSDTs and SSDTs.) This includes the new tables
2832 added to the ACPICA headers, therefore all current and known ACPI tables are
2835 Disassembler: The change to allow ACPI names with invalid characters also
2836 enables the disassembly of such tables. Invalid characters within names are
2837 changed to '*' to make the name printable; the iASL compiler will still
2838 generate an error for such names, however, since this is an invalid ACPI
2841 Implemented an option for AcpiXtract (-a) to extract all tables found in the
2842 input file. The default invocation extracts only the DSDTs and SSDTs.
2844 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
2845 makefile for the AcpiXtract utility.
2847 ----------------------------------------
2848 17 March 2006. Summary of changes for version 20060317:
2850 1) ACPI CA Core Subsystem:
2852 Implemented the use of a cache object for all internal namespace nodes.
2853 Since there are about 1000 static nodes in a typical system, this will
2854 decrease memory use for cache implementations that minimize per-allocation
2855 overhead (such as a slab allocator.)
2857 Removed the reference count mechanism for internal namespace nodes, since it
2858 was deemed unnecessary. This reduces the size of each namespace node by
2859 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
2860 and 32 bytes for the 64-bit case.
2862 Optimized several internal data structures to reduce object size on 64-bit
2863 platforms by packing data within the 64-bit alignment. This includes the
2864 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
2865 instances corresponding to the namespace objects.
2867 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
2870 Split the allocation tracking mechanism out to a separate file, from
2871 utalloc.c to uttrack.c. This mechanism appears to be only useful for
2872 application-level code. Kernels may wish to not include uttrack.c in
2875 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
2876 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
2879 Code and Data Size: These are the sizes for the acpica.lib produced by the
2880 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2881 driver or OSPM code. The debug version of the code includes the debug output
2882 trace mechanism and has a much larger code and data size. Note that these
2883 values will vary depending on the efficiency of the compiler and the
2884 compiler options used during generation.
2887 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2888 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2890 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2891 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2894 2) iASL Compiler/Disassembler and Tools:
2896 Implemented an ANSI C version of the acpixtract utility. This version will
2897 automatically extract the DSDT and all SSDTs from the input acpidump text
2898 file and dump the binary output to separate files. It can also display a
2899 summary of the input file including the headers for each table found and
2900 will extract any single ACPI table, with any signature. (See
2901 source/tools/acpixtract)
2903 ----------------------------------------
2904 10 March 2006. Summary of changes for version 20060310:
2906 1) ACPI CA Core Subsystem:
2908 Tagged all external interfaces to the subsystem with the new
2909 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
2910 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
2911 macro. The default definition is NULL.
2913 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
2914 This allows the host to define this as necessary to simplify kernel
2915 integration. The default definition is ACPI_NATIVE_UINT.
2917 Fixed two interpreter problems related to error processing, the deletion of
2918 objects, and placing invalid pointers onto the internal operator result
2919 stack. BZ 6028, 6151 (Valery Podrezov)
2921 Increased the reference count threshold where a warning is emitted for large
2922 reference counts in order to eliminate unnecessary warnings on systems with
2923 large namespaces (especially 64-bit.) Increased the value from 0x400 to
2926 Due to universal disagreement as to the meaning of the 'c' in the calloc()
2927 function, the ACPI_MEM_CALLOCATE macro has been renamed to
2928 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
2929 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
2932 Code and Data Size: These are the sizes for the acpica.lib produced by the
2933 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2934 driver or OSPM code. The debug version of the code includes the debug output
2935 trace mechanism and has a much larger code and data size. Note that these
2936 values will vary depending on the efficiency of the compiler and the
2937 compiler options used during generation.
2940 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2941 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2943 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2944 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2947 2) iASL Compiler/Disassembler:
2949 Disassembler: implemented support for symbolic resource descriptor
2950 references. If a CreateXxxxField operator references a fixed offset within a
2951 resource descriptor, a name is assigned to the descriptor and the offset is
2952 translated to the appropriate resource tag and pathname. The addition of
2953 this support brings the disassembled code very close to the original ASL
2954 source code and helps eliminate run-time errors when the disassembled code
2955 is modified (and recompiled) in such a way as to invalidate the original
2958 Implemented support for a Descriptor Name as the last parameter to the ASL
2959 Register() macro. This parameter was inadvertently left out of the ACPI
2960 specification, and will be added for ACPI 3.0b.
2962 Fixed a problem where the use of the "_OSI" string (versus the full path
2963 "\_OSI") caused an internal compiler error. ("No back ptr to op")
2965 Fixed a problem with the error message that occurs when an invalid string is
2966 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
2967 The correct message is now displayed.
2969 ----------------------------------------
2970 17 February 2006. Summary of changes for version 20060217:
2972 1) ACPI CA Core Subsystem:
2974 Implemented a change to the IndexField support to match the behavior of the
2975 Microsoft AML interpreter. The value written to the Index register is now a
2976 byte offset, no longer an index based upon the width of the Data register.
2977 This should fix IndexField problems seen on some machines where the Data
2978 register is not exactly one byte wide. The ACPI specification will be
2979 clarified on this point.
2981 Fixed a problem where several resource descriptor types could overrun the
2982 internal descriptor buffer due to size miscalculation: VendorShort,
2983 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
2984 affect all platforms.
2986 Fixed a problem where individual resource descriptors were misaligned within
2987 the internal buffer, causing alignment faults on IA64 platforms.
2989 Code and Data Size: These are the sizes for the acpica.lib produced by the
2990 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2991 driver or OSPM code. The debug version of the code includes the debug output
2992 trace mechanism and has a much larger code and data size. Note that these
2993 values will vary depending on the efficiency of the compiler and the
2994 compiler options used during generation.
2997 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2998 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3000 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
3001 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
3004 2) iASL Compiler/Disassembler:
3006 Implemented support for new reserved names: _WDG and _WED are Microsoft
3007 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
3008 defined method (Throttling Depth Limit.)
3010 Fixed a problem where a zero-length VendorShort or VendorLong resource
3011 descriptor was incorrectly emitted as a descriptor of length one.
3013 ----------------------------------------
3014 10 February 2006. Summary of changes for version 20060210:
3016 1) ACPI CA Core Subsystem:
3018 Removed a couple of extraneous ACPI_ERROR messages that appeared during
3019 normal execution. These became apparent after the conversion from
3022 Fixed a problem where the CreateField operator could hang if the BitIndex or
3023 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
3025 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
3026 failed with an exception. This also fixes a couple of related RefOf and
3027 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
3029 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
3030 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
3033 Implemented a memory cleanup at the end of the execution of each iteration
3034 of an AML While() loop, preventing the accumulation of outstanding objects.
3035 (Valery Podrezov, BZ 5427)
3037 Eliminated a chunk of duplicate code in the object resolution code. (Valery
3040 Fixed several warnings during the 64-bit code generation.
3042 The AcpiSrc source code conversion tool now inserts one line of whitespace
3043 after an if() statement that is followed immediately by a comment, improving
3044 readability of the Linux code.
3046 Code and Data Size: The current and previous library sizes for the core
3047 subsystem are shown below. These are the code and data sizes for the
3048 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3049 values do not include any ACPI driver or OSPM code. The debug version of the
3050 code includes the debug output trace mechanism and has a much larger code
3051 and data size. Note that these values will vary depending on the efficiency
3052 of the compiler and the compiler options used during generation.
3055 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3056 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3058 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3059 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3062 2) iASL Compiler/Disassembler:
3064 Fixed a problem with the disassembly of a BankField operator with a complex
3065 expression for the BankValue parameter.
3067 ----------------------------------------
3068 27 January 2006. Summary of changes for version 20060127:
3070 1) ACPI CA Core Subsystem:
3072 Implemented support in the Resource Manager to allow unresolved namestring
3073 references within resource package objects for the _PRT method. This support
3074 is in addition to the previously implemented unresolved reference support
3075 within the AML parser. If the interpreter slack mode is enabled, these
3076 unresolved references will be passed through to the caller as a NULL package
3079 Implemented and deployed new macros and functions for error and warning
3080 messages across the subsystem. These macros are simpler and generate less
3081 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
3082 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
3083 macros remain defined to allow ACPI drivers time to migrate to the new
3086 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
3087 Acquire/Release Lock OSL interfaces.
3089 Fixed a problem where Alias ASL operators are sometimes not correctly
3090 resolved, in both the interpreter and the iASL compiler.
3092 Fixed several problems with the implementation of the ConcatenateResTemplate
3093 ASL operator. As per the ACPI specification, zero length buffers are now
3094 treated as a single EndTag. One-length buffers always cause a fatal
3095 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
3096 cause a fatal exception.
3098 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
3099 interface. (With assistance from Thomas Renninger)
3101 Code and Data Size: The current and previous library sizes for the core
3102 subsystem are shown below. These are the code and data sizes for the
3103 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3104 values do not include any ACPI driver or OSPM code. The debug version of the
3105 code includes the debug output trace mechanism and has a much larger code
3106 and data size. Note that these values will vary depending on the efficiency
3107 of the compiler and the compiler options used during generation.
3110 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3111 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3113 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3114 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3117 2) iASL Compiler/Disassembler:
3119 Fixed an internal error that was generated for any forward references to ASL
3122 ----------------------------------------
3123 13 January 2006. Summary of changes for version 20060113:
3125 1) ACPI CA Core Subsystem:
3127 Added 2006 copyright to all module headers and signons. This affects
3128 virtually every file in the ACPICA core subsystem, iASL compiler, and the
3131 Enhanced the ACPICA error reporting in order to simplify user migration to
3132 the non-debug version of ACPICA. Replaced all instances of the
3133 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
3134 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
3135 respectively. This preserves all error and warning messages in the non-debug
3136 version of the ACPICA code (this has been referred to as the "debug lite"
3137 option.) Over 200 cases were converted to create a total of over 380
3138 error/warning messages across the ACPICA code. This increases the code and
3139 data size of the default non-debug version of the code somewhat (about 13K),
3140 but all error/warning reporting may be disabled if desired (and code
3141 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
3142 configuration option. The size of the debug version of ACPICA remains about
3145 Fixed a memory leak within the AML Debugger "Set" command. One object was
3146 not properly deleted for every successful invocation of the command.
3148 Code and Data Size: The current and previous library sizes for the core
3149 subsystem are shown below. These are the code and data sizes for the
3150 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3151 values do not include any ACPI driver or OSPM code. The debug version of the
3152 code includes the debug output trace mechanism and has a much larger code
3153 and data size. Note that these values will vary depending on the efficiency
3154 of the compiler and the compiler options used during generation.
3157 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3158 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3160 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3161 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3164 2) iASL Compiler/Disassembler:
3166 The compiler now officially supports the ACPI 3.0a specification that was
3167 released on December 30, 2005. (Specification is available at www.acpi.info)
3169 ----------------------------------------
3170 16 December 2005. Summary of changes for version 20051216:
3172 1) ACPI CA Core Subsystem:
3174 Implemented optional support to allow unresolved names within ASL Package
3175 objects. A null object is inserted in the package when a named reference
3176 cannot be located in the current namespace. Enabled via the interpreter
3177 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
3178 that contain such code.
3180 Implemented an optimization to the initialization sequence that can improve
3181 boot time. During ACPI device initialization, the _STA method is now run if
3182 and only if the _INI method exists. The _STA method is used to determine if
3183 the device is present; An _INI can only be run if _STA returns present, but
3184 it is a waste of time to run the _STA method if the _INI does not exist.
3185 (Prototype and assistance from Dong Wei)
3187 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
3188 available in the current compiler. Otherwise, the default (void *) cast is
3191 Fixed some possible memory leaks found within the execution path of the
3192 Break, Continue, If, and CreateField operators. (Valery Podrezov)
3194 Fixed a problem introduced in the 20051202 release where an exception is
3195 generated during method execution if a control method attempts to declare
3198 Moved resource descriptor string constants that are used by both the AML
3199 disassembler and AML debugger to the common utilities directory so that
3200 these components are independent.
3202 Implemented support in the AcpiExec utility (-e switch) to globally ignore
3203 exceptions during control method execution (method is not aborted.)
3205 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
3208 Code and Data Size: The current and previous library sizes for the core
3209 subsystem are shown below. These are the code and data sizes for the
3210 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3211 values do not include any ACPI driver or OSPM code. The debug version of the
3212 code includes the debug output trace mechanism and has a much larger code
3213 and data size. Note that these values will vary depending on the efficiency
3214 of the compiler and the compiler options used during generation.
3217 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3218 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3220 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3221 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3224 2) iASL Compiler/Disassembler:
3226 Fixed a problem where a CPU stack overflow fault could occur if a recursive
3227 method call was made from within a Return statement.
3229 ----------------------------------------
3230 02 December 2005. Summary of changes for version 20051202:
3232 1) ACPI CA Core Subsystem:
3234 Modified the parsing of control methods to no longer create namespace
3235 objects during the first pass of the parse. Objects are now created only
3236 during the execute phase, at the moment the namespace creation operator is
3237 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
3238 should eliminate ALREADY_EXISTS exceptions seen on some machines where
3239 reentrant control methods are protected by an AML mutex. The mutex will now
3240 correctly block multiple threads from attempting to create the same object
3243 Increased the number of available Owner Ids for namespace object tracking
3244 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
3245 some machines with a large number of ACPI tables (either static or dynamic).
3247 Fixed a problem with the AcpiExec utility where a fault could occur when the
3248 -b switch (batch mode) is used.
3250 Enhanced the namespace dump routine to output the owner ID for each
3253 Code and Data Size: The current and previous library sizes for the core
3254 subsystem are shown below. These are the code and data sizes for the
3255 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3256 values do not include any ACPI driver or OSPM code. The debug version of the
3257 code includes the debug output trace mechanism and has a much larger code
3258 and data size. Note that these values will vary depending on the efficiency
3259 of the compiler and the compiler options used during generation.
3262 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3263 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3265 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3266 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3269 2) iASL Compiler/Disassembler:
3271 Fixed a parse error during compilation of certain Switch/Case constructs. To
3272 simplify the parse, the grammar now allows for multiple Default statements
3273 and this error is now detected and flagged during the analysis phase.
3275 Disassembler: The disassembly now includes the contents of the original
3276 table header within a comment at the start of the file. This includes the
3277 name and version of the original ASL compiler.
3279 ----------------------------------------
3280 17 November 2005. Summary of changes for version 20051117:
3282 1) ACPI CA Core Subsystem:
3284 Fixed a problem in the AML parser where the method thread count could be
3285 decremented below zero if any errors occurred during the method parse phase.
3286 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
3287 This also fixed a related regression with the mechanism that detects and
3288 corrects methods that cannot properly handle reentrancy (related to the
3289 deployment of the new OwnerId mechanism.)
3291 Eliminated the pre-parsing of control methods (to detect errors) during
3292 table load. Related to the problem above, this was causing unwind issues if
3293 any errors occurred during the parse, and it seemed to be overkill. A table
3294 load should not be aborted if there are problems with any single control
3295 method, thus rendering this feature rather pointless.
3297 Fixed a problem with the new table-driven resource manager where an internal
3298 buffer overflow could occur for small resource templates.
3300 Implemented a new external interface, AcpiGetVendorResource. This interface
3301 will find and return a vendor-defined resource descriptor within a _CRS or
3302 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
3304 Removed the length limit (200) on string objects as per the upcoming ACPI
3305 3.0A specification. This affects the following areas of the interpreter: 1)
3306 any implicit conversion of a Buffer to a String, 2) a String object result
3307 of the ASL Concatentate operator, 3) the String object result of the ASL
3310 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
3311 on a semaphore object would incorrectly timeout. This allows the
3312 multithreading features of the AcpiExec utility to work properly under
3315 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
3316 the recently added file named "utresrc.c".
3318 Code and Data Size: The current and previous library sizes for the core
3319 subsystem are shown below. These are the code and data sizes for the
3320 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3321 values do not include any ACPI driver or OSPM code. The debug version of the
3322 code includes the debug output trace mechanism and has a much larger code
3323 and data size. Note that these values will vary depending on the efficiency
3324 of the compiler and the compiler options used during generation.
3327 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3328 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3330 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3331 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3334 2) iASL Compiler/Disassembler:
3336 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
3337 specification. For the iASL compiler, this means that string literals within
3338 the source ASL can be of any length.
3340 Enhanced the listing output to dump the AML code for resource descriptors
3341 immediately after the ASL code for each descriptor, instead of in a block at
3342 the end of the entire resource template.
3344 Enhanced the compiler debug output to dump the entire original parse tree
3345 constructed during the parse phase, before any transforms are applied to the
3346 tree. The transformed tree is dumped also.
3348 ----------------------------------------
3349 02 November 2005. Summary of changes for version 20051102:
3351 1) ACPI CA Core Subsystem:
3353 Modified the subsystem initialization sequence to improve GPE support. The
3354 GPE initialization has been split into two parts in order to defer execution
3355 of the _PRW methods (Power Resources for Wake) until after the hardware is
3356 fully initialized and the SCI handler is installed. This allows the _PRW
3357 methods to access fields protected by the Global Lock. This will fix systems
3358 where a NO_GLOBAL_LOCK exception has been seen during initialization.
3360 Converted the ACPI internal object disassemble and display code within the
3361 AML debugger to fully table-driven operation, reducing code size and
3362 increasing maintainability.
3364 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
3365 in the 20051021 release.
3367 Implemented support for "local" internal ACPI object types within the
3368 debugger "Object" command and the AcpiWalkNamespace external interfaces.
3369 These local types include RegionFields, BankFields, IndexFields, Alias, and
3372 Moved common AML resource handling code into a new file, "utresrc.c". This
3373 code is shared by both the Resource Manager and the AML Debugger.
3375 Code and Data Size: The current and previous library sizes for the core
3376 subsystem are shown below. These are the code and data sizes for the
3377 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3378 values do not include any ACPI driver or OSPM code. The debug version of the
3379 code includes the debug output trace mechanism and has a much larger code
3380 and data size. Note that these values will vary depending on the efficiency
3381 of the compiler and the compiler options used during generation.
3384 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3385 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3387 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3388 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3391 2) iASL Compiler/Disassembler:
3393 Fixed a problem with very large initializer lists (more than 4000 elements)
3394 for both Buffer and Package objects where the parse stack could overflow.
3396 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
3397 characters within comment fields. The scan is now always performed and is no
3398 longer optional, detecting invalid characters within a source file
3399 immediately rather than during the parse phase or later.
3401 Enhanced the ASL grammar definition to force early reductions on all list-
3402 style grammar elements so that the overall parse stack usage is greatly
3403 reduced. This should improve performance and reduce the possibility of parse
3406 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
3407 with the addition of a %expected statement, the compiler generates from
3408 source with no warnings.
3410 Fixed a possible segment fault in the disassembler if the input filename
3411 does not contain a "dot" extension (Thomas Renninger).
3413 ----------------------------------------
3414 21 October 2005. Summary of changes for version 20051021:
3416 1) ACPI CA Core Subsystem:
3418 Implemented support for the EM64T and other x86-64 processors. This
3419 essentially entails recognizing that these processors support non-aligned
3420 memory transfers. Previously, all 64-bit processors were assumed to lack
3421 hardware support for non-aligned transfers.
3423 Completed conversion of the Resource Manager to nearly full table-driven
3424 operation. Specifically, the resource conversion code (convert AML to
3425 internal format and the reverse) and the debug code to dump internal
3426 resource descriptors are fully table-driven, reducing code and data size and
3427 improving maintainability.
3429 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
3430 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
3431 Alexey Starikovskiy)
3433 Implemented support within the resource conversion code for the Type-
3434 Specific byte within the various ACPI 3.0 *WordSpace macros.
3436 Fixed some issues within the resource conversion code for the type-specific
3437 flags for both Memory and I/O address resource descriptors. For Memory,
3438 implemented support for the MTP and TTP flags. For I/O, split the TRS and
3439 TTP flags into two separate fields.
3441 Code and Data Size: The current and previous library sizes for the core
3442 subsystem are shown below. These are the code and data sizes for the
3443 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3444 values do not include any ACPI driver or OSPM code. The debug version of the
3445 code includes the debug output trace mechanism and has a much larger code
3446 and data size. Note that these values will vary depending on the efficiency
3447 of the compiler and the compiler options used during generation.
3450 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3451 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3453 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3454 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3458 2) iASL Compiler/Disassembler:
3460 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
3461 corresponding ResourceSource string was not also present in a resource
3462 descriptor declaration. This restriction caused problems with existing
3463 AML/ASL code that includes the Index byte without the string. When such AML
3464 was disassembled, it could not be compiled without modification. Further,
3465 the modified code created a resource template with a different size than the
3466 original, breaking code that used fixed offsets into the resource template
3469 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
3470 byte. This byte is now emitted if present so that the exact AML can be
3471 reproduced when the disassembled code is recompiled.
3473 Improved comments and text alignment for the resource descriptor code
3474 emitted by the disassembler.
3476 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
3477 Register() resource descriptor.
3479 ----------------------------------------
3480 30 September 2005. Summary of changes for version 20050930:
3482 1) ACPI CA Core Subsystem:
3484 Completed a major overhaul of the Resource Manager code - specifically,
3485 optimizations in the area of the AML/internal resource conversion code. The
3486 code has been optimized to simplify and eliminate duplicated code, CPU stack
3487 use has been decreased by optimizing function parameters and local
3488 variables, and naming conventions across the manager have been standardized
3489 for clarity and ease of maintenance (this includes function, parameter,
3490 variable, and struct/typedef names.) The update may force changes in some
3491 driver code, depending on how resources are handled by the host OS.
3493 All Resource Manager dispatch and information tables have been moved to a
3494 single location for clarity and ease of maintenance. One new file was
3495 created, named "rsinfo.c".
3497 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
3498 guarantee that the argument is not evaluated twice, making them less prone
3499 to macro side-effects. However, since there exists the possibility of
3500 additional stack use if a particular compiler cannot optimize them (such as
3501 in the debug generation case), the original macros are optionally available.
3502 Note that some invocations of the return_VALUE macro may now cause size
3503 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
3504 eliminate these. (From Randy Dunlap)
3506 Implemented a new mechanism to enable debug tracing for individual control
3507 methods. A new external interface, AcpiDebugTrace, is provided to enable
3508 this mechanism. The intent is to allow the host OS to easily enable and
3509 disable tracing for problematic control methods. This interface can be
3510 easily exposed to a user or debugger interface if desired. See the file
3511 psxface.c for details.
3513 AcpiUtCallocate will now return a valid pointer if a length of zero is
3514 specified - a length of one is used and a warning is issued. This matches
3515 the behavior of AcpiUtAllocate.
3517 Code and Data Size: The current and previous library sizes for the core
3518 subsystem are shown below. These are the code and data sizes for the
3519 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3520 values do not include any ACPI driver or OSPM code. The debug version of the
3521 code includes the debug output trace mechanism and has a much larger code
3522 and data size. Note that these values will vary depending on the efficiency
3523 of the compiler and the compiler options used during generation.
3526 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3527 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3529 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3530 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3533 2) iASL Compiler/Disassembler:
3535 A remark is issued if the effective compile-time length of a package or
3536 buffer is zero. Previously, this was a warning.
3538 ----------------------------------------
3539 16 September 2005. Summary of changes for version 20050916:
3541 1) ACPI CA Core Subsystem:
3543 Fixed a problem within the Resource Manager where support for the Generic
3544 Register descriptor was not fully implemented. This descriptor is now fully
3545 recognized, parsed, disassembled, and displayed.
3547 Completely restructured the Resource Manager code to utilize table-driven
3548 dispatch and lookup, eliminating many of the large switch() statements. This
3549 reduces overall subsystem code size and code complexity. Affects the
3550 resource parsing and construction, disassembly, and debug dump output.
3552 Cleaned up and restructured the debug dump output for all resource
3553 descriptors. Improved readability of the output and reduced code size.
3555 Fixed a problem where changes to internal data structures caused the
3556 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
3558 Code and Data Size: The current and previous library sizes for the core
3559 subsystem are shown below. These are the code and data sizes for the
3560 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3561 values do not include any ACPI driver or OSPM code. The debug version of the
3562 code includes the debug output trace mechanism and has a much larger code
3563 and data size. Note that these values will vary depending on the efficiency
3564 of the compiler and the compiler options used during generation.
3567 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3568 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3570 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3571 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3574 2) iASL Compiler/Disassembler:
3576 Updated the disassembler to automatically insert an EndDependentFn() macro
3577 into the ASL stream if this macro is missing in the original AML code,
3578 simplifying compilation of the resulting ASL module.
3580 Fixed a problem in the disassembler where a disassembled ResourceSource
3581 string (within a large resource descriptor) was not surrounded by quotes and
3582 not followed by a comma, causing errors when the resulting ASL module was
3583 compiled. Also, escape sequences within a ResourceSource string are now
3584 handled correctly (especially "\\")
3586 ----------------------------------------
3587 02 September 2005. Summary of changes for version 20050902:
3589 1) ACPI CA Core Subsystem:
3591 Fixed a problem with the internal Owner ID allocation and deallocation
3592 mechanisms for control method execution and recursive method invocation.
3593 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
3594 messages seen on some systems. Recursive method invocation depth is
3595 currently limited to 255. (Alexey Starikovskiy)
3597 Completely eliminated all vestiges of support for the "module-level
3598 executable code" until this support is fully implemented and debugged. This
3599 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
3600 some systems that invoke this support.
3602 Fixed a problem within the resource manager code where the transaction flags
3603 for a 64-bit address descriptor were handled incorrectly in the type-
3606 Consolidated duplicate code within the address descriptor resource manager
3607 code, reducing overall subsystem code size.
3609 Fixed a fault when using the AML debugger "disassemble" command to
3610 disassemble individual control methods.
3612 Removed references to the "release_current" directory within the Unix
3615 Code and Data Size: The current and previous core subsystem library sizes
3616 are shown below. These are the code and data sizes for the acpica.lib
3617 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
3618 include any ACPI driver or OSPM code. The debug version of the code includes
3619 the debug output trace mechanism and has a much larger code and data size.
3620 Note that these values will vary depending on the efficiency of the compiler
3621 and the compiler options used during generation.
3624 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3625 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3627 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3628 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3631 2) iASL Compiler/Disassembler:
3633 Implemented an error check for illegal duplicate values in the interrupt and
3634 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
3637 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
3638 too many values in the interrupt list (16 max) and invalid values in the
3641 The maximum length string literal within an ASL file is now restricted to
3642 200 characters as per the ACPI specification.
3644 Fixed a fault when using the -ln option (generate namespace listing).
3646 Implemented an error check to determine if a DescriptorName within a
3647 resource descriptor has already been used within the current scope.
3649 ----------------------------------------
3650 15 August 2005. Summary of changes for version 20050815:
3652 1) ACPI CA Core Subsystem:
3654 Implemented a full bytewise compare to determine if a table load request is
3655 attempting to load a duplicate table. The compare is performed if the table
3656 signatures and table lengths match. This will allow different tables with
3657 the same OEM Table ID and revision to be loaded - probably against the ACPI
3658 specification, but discovered in the field nonetheless.
3660 Added the changes.txt logfile to each of the zipped release packages.
3662 Code and Data Size: Current and previous core subsystem library sizes are
3663 shown below. These are the code and data sizes for the acpica.lib produced
3664 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3665 any ACPI driver or OSPM code. The debug version of the code includes the
3666 debug output trace mechanism and has a much larger code and data size. Note
3667 that these values will vary depending on the efficiency of the compiler and
3668 the compiler options used during generation.
3671 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3672 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3674 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3675 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3678 2) iASL Compiler/Disassembler:
3680 Fixed a problem where incorrect AML code could be generated for Package
3681 objects if optimization is disabled (via the -oa switch).
3683 Fixed a problem with where incorrect AML code is generated for variable-
3684 length packages when the package length is not specified and the number of
3685 initializer values is greater than 255.
3688 ----------------------------------------
3689 29 July 2005. Summary of changes for version 20050729:
3691 1) ACPI CA Core Subsystem:
3693 Implemented support to ignore an attempt to install/load a particular ACPI
3694 table more than once. Apparently there exists BIOS code that repeatedly
3695 attempts to load the same SSDT upon certain events. With assistance from
3696 Venkatesh Pallipadi.
3698 Restructured the main interface to the AML parser in order to correctly
3699 handle all exceptional conditions. This will prevent leakage of the OwnerId
3700 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
3701 machines. With assistance from Alexey Starikovskiy.
3703 Support for "module level code" has been disabled in this version due to a
3704 number of issues that have appeared on various machines. The support can be
3705 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
3706 compilation. When the issues are fully resolved, the code will be enabled by
3709 Modified the internal functions for debug print support to define the
3710 FunctionName parameter as a (const char *) for compatibility with compiler
3711 built-in macros such as __FUNCTION__, etc.
3713 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
3715 Implemented support to display an object count summary for the AML Debugger
3716 commands Object and Methods.
3718 Code and Data Size: Current and previous core subsystem library sizes are
3719 shown below. These are the code and data sizes for the acpica.lib produced
3720 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3721 any ACPI driver or OSPM code. The debug version of the code includes the
3722 debug output trace mechanism and has a much larger code and data size. Note
3723 that these values will vary depending on the efficiency of the compiler and
3724 the compiler options used during generation.
3727 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3728 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3730 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3731 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3734 2) iASL Compiler/Disassembler:
3736 Fixed a regression that appeared in the 20050708 version of the compiler
3737 where an error message was inadvertently emitted for invocations of the _OSI
3738 reserved control method.
3740 ----------------------------------------
3741 08 July 2005. Summary of changes for version 20050708:
3743 1) ACPI CA Core Subsystem:
3745 The use of the CPU stack in the debug version of the subsystem has been
3746 considerably reduced. Previously, a debug structure was declared in every
3747 function that used the debug macros. This structure has been removed in
3748 favor of declaring the individual elements as parameters to the debug
3749 functions. This reduces the cumulative stack use during nested execution of
3750 ACPI function calls at the cost of a small increase in the code size of the
3751 debug version of the subsystem. With assistance from Alexey Starikovskiy and
3754 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
3755 headers to define a macro that will return the current function name at
3756 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
3757 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
3758 compiler-dependent header, the function name is saved on the CPU stack (one
3759 pointer per function.) This mechanism is used because apparently there
3760 exists no standard ANSI-C defined macro that that returns the function name.
3762 Redesigned and reimplemented the "Owner ID" mechanism used to track
3763 namespace objects created/deleted by ACPI tables and control method
3764 execution. A bitmap is now used to allocate and free the IDs, thus solving
3765 the wraparound problem present in the previous implementation. The size of
3766 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
3769 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
3770 flag definitions within the headers for the predefined ACPI tables. These
3771 have been replaced by UINT8_BIT in order to increase the code portability of
3772 the subsystem. If the use of UINT8 remains a problem, we may be forced to
3773 eliminate bitfields entirely because of a lack of portability.
3775 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
3776 is a frequently used function and this improvement increases the performance
3777 of the entire subsystem (Alexey Starikovskiy).
3779 Fixed several possible memory leaks and the inverse - premature object
3780 deletion (Alexey Starikovskiy).
3782 Code and Data Size: Current and previous core subsystem library sizes are
3783 shown below. These are the code and data sizes for the acpica.lib produced
3784 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3785 any ACPI driver or OSPM code. The debug version of the code includes the
3786 debug output trace mechanism and has a much larger code and data size. Note
3787 that these values will vary depending on the efficiency of the compiler and
3788 the compiler options used during generation.
3791 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3792 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3794 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3795 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3797 ----------------------------------------
3798 24 June 2005. Summary of changes for version 20050624:
3800 1) ACPI CA Core Subsystem:
3802 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
3803 the host-defined cache object. This allows the OSL implementation to define
3804 and type this object in any manner desired, simplifying the OSL
3805 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
3806 Linux, and should be defined in the OS-specific header file for other
3807 operating systems as required.
3809 Changed the interface to AcpiOsAcquireObject to directly return the
3810 requested object as the function return (instead of ACPI_STATUS.) This
3811 change was made for performance reasons, since this is the purpose of the
3812 interface in the first place. AcpiOsAcquireObject is now similar to the
3813 AcpiOsAllocate interface.
3815 Implemented a new AML debugger command named Businfo. This command displays
3816 information about all devices that have an associate _PRT object. The _ADR,
3817 _HID, _UID, and _CID are displayed for these devices.
3819 Modified the initialization sequence in AcpiInitializeSubsystem to call the
3820 OSL interface AcpiOslInitialize first, before any local initialization. This
3821 change was required because the global initialization now calls OSL
3824 Enhanced the Dump command to display the entire contents of Package objects
3825 (including all sub-objects and their values.)
3827 Restructured the code base to split some files because of size and/or
3828 because the code logically belonged in a separate file. New files are listed
3829 below. All makefiles and project files included in the ACPI CA release have
3831 utilities/utcache.c /* Local cache interfaces */
3832 utilities/utmutex.c /* Local mutex support */
3833 utilities/utstate.c /* State object support */
3834 interpreter/parser/psloop.c /* Main AML parse loop */
3836 Code and Data Size: Current and previous core subsystem library sizes are
3837 shown below. These are the code and data sizes for the acpica.lib produced
3838 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3839 any ACPI driver or OSPM code. The debug version of the code includes the
3840 debug output trace mechanism and has a much larger code and data size. Note
3841 that these values will vary depending on the efficiency of the compiler and
3842 the compiler options used during generation.
3845 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3846 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3848 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3849 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3852 2) iASL Compiler/Disassembler:
3854 Fixed a regression introduced in version 20050513 where the use of a Package
3855 object within a Case() statement caused a compile time exception. The
3856 original behavior has been restored (a Match() operator is emitted.)
3858 ----------------------------------------
3859 17 June 2005. Summary of changes for version 20050617:
3861 1) ACPI CA Core Subsystem:
3863 Moved the object cache operations into the OS interface layer (OSL) to allow
3864 the host OS to handle these operations if desired (for example, the Linux
3865 OSL will invoke the slab allocator). This support is optional; the compile
3866 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
3867 code in the ACPI CA core. The new OSL interfaces are shown below. See
3868 utalloc.c for an example implementation, and acpiosxf.h for the exact
3869 interface definitions. With assistance from Alexey Starikovskiy.
3876 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
3877 and restore a flags parameter. This fits better with many OS lock models.
3878 Note: the current execution state (interrupt handler or not) is no longer
3879 passed to these interfaces. If necessary, the OSL must determine this state
3880 by itself, a simple and fast operation. With assistance from Alexey
3883 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
3884 present if the revision of the RSDP was 2 or greater. According to the ACPI
3885 specification, the XSDT is optional in all cases, and the table manager
3886 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
3887 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
3890 Fixed an interpreter problem with the Mid() operator in the case of an input
3891 string where the resulting output string is of zero length. It now correctly
3892 returns a valid, null terminated string object instead of a string object
3893 with a null pointer.
3895 Fixed a problem with the control method argument handling to allow a store
3896 to an Arg object that already contains an object of type Device. The Device
3897 object is now correctly overwritten. Previously, an error was returned.
3900 Enhanced the debugger Find command to emit object values in addition to the
3901 found object pathnames. The output format is the same as the dump namespace
3904 Enhanced the debugger Set command. It now has the ability to set the value
3905 of any Named integer object in the namespace (Previously, only method locals
3906 and args could be set.)
3908 Code and Data Size: Current and previous core subsystem library sizes are
3909 shown below. These are the code and data sizes for the acpica.lib produced
3910 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3911 any ACPI driver or OSPM code. The debug version of the code includes the
3912 debug output trace mechanism and has a much larger code and data size. Note
3913 that these values will vary depending on the efficiency of the compiler and
3914 the compiler options used during generation.
3917 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3918 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3920 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3921 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3924 2) iASL Compiler/Disassembler:
3926 Fixed a regression in the disassembler where if/else/while constructs were
3927 output incorrectly. This problem was introduced in the previous release
3928 (20050526). This problem also affected the single-step disassembly in the
3931 Fixed a problem where compiling the reserved _OSI method would randomly (but
3932 rarely) produce compile errors.
3934 Enhanced the disassembler to emit compilable code in the face of incorrect
3935 AML resource descriptors. If the optional ResourceSourceIndex is present,
3936 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
3937 disassembly. Otherwise, the resulting code cannot be compiled without
3940 ----------------------------------------
3941 26 May 2005. Summary of changes for version 20050526:
3943 1) ACPI CA Core Subsystem:
3945 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
3946 the module level (not within a control method.) These opcodes are executed
3947 exactly once at the time the table is loaded. This type of code was legal up
3948 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
3949 order to provide backwards compatibility with earlier BIOS implementations.
3950 This eliminates the "Encountered executable code at module level" warning
3951 that was previously generated upon detection of such code.
3953 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
3954 inadvertently be generated during the lookup of namespace objects in the
3955 second pass parse of ACPI tables and control methods. It appears that this
3956 problem could occur during the resolution of forward references to namespace
3959 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
3960 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
3961 allows the deadlock detection debug code to be compiled out in the normal
3962 case, improving mutex performance (and overall subsystem performance)
3965 Implemented a handful of miscellaneous fixes for possible memory leaks on
3966 error conditions and error handling control paths. These fixes were
3967 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
3969 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
3970 to prevent a fault in this error case.
3972 Code and Data Size: Current and previous core subsystem library sizes are
3973 shown below. These are the code and data sizes for the acpica.lib produced
3974 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3975 any ACPI driver or OSPM code. The debug version of the code includes the
3976 debug output trace mechanism and has a much larger code and data size. Note
3977 that these values will vary depending on the efficiency of the compiler and
3978 the compiler options used during generation.
3981 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3982 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3984 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3985 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3988 2) iASL Compiler/Disassembler:
3990 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
3991 the module level (not within a control method.) These operators will be
3992 executed once at the time the table is loaded. This type of code was legal
3993 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
3994 compiler in order to provide backwards compatibility with earlier BIOS ASL
3997 The ACPI integer width (specified via the table revision ID or the -r
3998 override, 32 or 64 bits) is now used internally during compile-time constant
3999 folding to ensure that constants are truncated to 32 bits if necessary.
4000 Previously, the revision ID value was only emitted in the AML table header.
4002 An error message is now generated for the Mutex and Method operators if the
4003 SyncLevel parameter is outside the legal range of 0 through 15.
4005 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
4006 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
4007 The actual underlying implementation of method argument typechecking is
4008 still under development, however.
4010 ----------------------------------------
4011 13 May 2005. Summary of changes for version 20050513:
4013 1) ACPI CA Core Subsystem:
4015 Implemented support for PCI Express root bridges -- added support for device
4016 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
4018 The interpreter now automatically truncates incoming 64-bit constants to 32
4019 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
4020 also affects the iASL compiler constant folding. (Note: as per below, the
4021 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
4023 Fixed a problem where string and buffer objects with "static" pointers
4024 (pointers to initialization data within an ACPI table) were not handled
4025 consistently. The internal object copy operation now always copies the data
4026 to a newly allocated buffer, regardless of whether the source object is
4029 Fixed a problem with the FromBCD operator where an implicit result
4030 conversion was improperly performed while storing the result to the target
4031 operand. Since this is an "explicit conversion" operator, the implicit
4032 conversion should never be performed on the output.
4034 Fixed a problem with the CopyObject operator where a copy to an existing
4035 named object did not always completely overwrite the existing object stored
4036 at name. Specifically, a buffer-to-buffer copy did not delete the existing
4039 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
4040 structs for consistency.
4042 Code and Data Size: Current and previous core subsystem library sizes are
4043 shown below. These are the code and data sizes for the acpica.lib produced
4044 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4045 any ACPI driver or OSPM code. The debug version of the code includes the
4046 debug output trace mechanism and has a much larger code and data size. Note
4047 that these values will vary depending on the efficiency of the compiler and
4048 the compiler options used during generation.
4051 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4052 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4053 Current Release: (Same sizes)
4054 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4055 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4058 2) iASL Compiler/Disassembler:
4060 The compiler now emits a warning if an attempt is made to generate a 64-bit
4061 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
4062 is truncated to 32 bits.
4064 Fixed a problem with large package objects: if the static length of the
4065 package is greater than 255, the "variable length package" opcode is
4066 emitted. Previously, this caused an error. This requires an update to the
4067 ACPI spec, since it currently (incorrectly) states that packages larger than
4068 255 elements are not allowed.
4070 The disassembler now correctly handles variable length packages and packages
4071 larger than 255 elements.
4073 ----------------------------------------
4074 08 April 2005. Summary of changes for version 20050408:
4076 1) ACPI CA Core Subsystem:
4078 Fixed three cases in the interpreter where an "index" argument to an ASL
4079 function was still (internally) 32 bits instead of the required 64 bits.
4080 This was the Index argument to the Index, Mid, and Match operators.
4082 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
4083 not a POSIX-defined function and not present in most kernel-level C
4084 libraries. All references to the C library strupr function have been removed
4087 Completed the deployment of static functions/prototypes. All prototypes with
4088 the static attribute have been moved from the headers to the owning C file.
4090 Implemented an extract option (-e) for the AcpiBin utility (AML binary
4091 utility). This option allows the utility to extract individual ACPI tables
4092 from the output of AcpiDmp. It provides the same functionality of the
4093 acpixtract.pl perl script without the worry of setting the correct perl
4094 options. AcpiBin runs on Windows and has not yet been generated/validated in
4095 the Linux/Unix environment (but should be soon).
4097 Updated and fixed the table dump option for AcpiBin (-d). This option
4098 converts a single ACPI table to a hex/ascii file, similar to the output of
4101 Code and Data Size: Current and previous core subsystem library sizes are
4102 shown below. These are the code and data sizes for the acpica.lib produced
4103 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4104 any ACPI driver or OSPM code. The debug version of the code includes the
4105 debug output trace mechanism and has a much larger code and data size. Note
4106 that these values will vary depending on the efficiency of the compiler and
4107 the compiler options used during generation.
4110 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4111 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4113 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4114 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4117 2) iASL Compiler/Disassembler:
4119 Disassembler fix: Added a check to ensure that the table length found in the
4120 ACPI table header within the input file is not longer than the actual input
4121 file size. This indicates some kind of file or table corruption.
4123 ----------------------------------------
4124 29 March 2005. Summary of changes for version 20050329:
4126 1) ACPI CA Core Subsystem:
4128 An error is now generated if an attempt is made to create a Buffer Field of
4129 length zero (A CreateField with a length operand of zero.)
4131 The interpreter now issues a warning whenever executable code at the module
4132 level is detected during ACPI table load. This will give some idea of the
4133 prevalence of this type of code.
4135 Implemented support for references to named objects (other than control
4136 methods) within package objects.
4138 Enhanced package object output for the debug object. Package objects are now
4139 completely dumped, showing all elements.
4141 Enhanced miscellaneous object output for the debug object. Any object can
4142 now be written to the debug object (for example, a device object can be
4143 written, and the type of the object will be displayed.)
4145 The "static" qualifier has been added to all local functions across both the
4146 core subsystem and the iASL compiler.
4148 The number of "long" lines (> 80 chars) within the source has been
4149 significantly reduced, by about 1/3.
4151 Cleaned up all header files to ensure that all CA/iASL functions are
4152 prototyped (even static functions) and the formatting is consistent.
4154 Two new header files have been added, acopcode.h and acnames.h.
4156 Removed several obsolete functions that were no longer used.
4158 Code and Data Size: Current and previous core subsystem library sizes are
4159 shown below. These are the code and data sizes for the acpica.lib produced
4160 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4161 any ACPI driver or OSPM code. The debug version of the code includes the
4162 debug output trace mechanism and has a much larger code and data size. Note
4163 that these values will vary depending on the efficiency of the compiler and
4164 the compiler options used during generation.
4167 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4168 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4170 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4171 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4175 2) iASL Compiler/Disassembler:
4177 Fixed a problem with the resource descriptor generation/support. For the
4178 ResourceSourceIndex and the ResourceSource fields, both must be present, or
4179 both must be not present - can't have one without the other.
4181 The compiler now returns non-zero from the main procedure if any errors have
4182 occurred during the compilation.
4185 ----------------------------------------
4186 09 March 2005. Summary of changes for version 20050309:
4188 1) ACPI CA Core Subsystem:
4190 The string-to-buffer implicit conversion code has been modified again after
4191 a change to the ACPI specification. In order to match the behavior of the
4192 other major ACPI implementation, the target buffer is no longer truncated if
4193 the source string is smaller than an existing target buffer. This change
4194 requires an update to the ACPI spec, and should eliminate the recent
4195 AE_AML_BUFFER_LIMIT issues.
4197 The "implicit return" support was rewritten to a new algorithm that solves
4198 the general case. Rather than attempt to determine when a method is about to
4199 exit, the result of every ASL operator is saved momentarily until the very
4200 next ASL operator is executed. Therefore, no matter how the method exits,
4201 there will always be a saved implicit return value. This feature is only
4202 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
4203 AE_AML_NO_RETURN_VALUE errors when enabled.
4205 Implemented implicit conversion support for the predicate (operand) of the
4206 If, Else, and While operators. String and Buffer arguments are automatically
4207 converted to Integers.
4209 Changed the string-to-integer conversion behavior to match the new ACPI
4210 errata: "If no integer object exists, a new integer is created. The ASCII
4211 string is interpreted as a hexadecimal constant. Each string character is
4212 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
4213 with the first character as the most significant digit, and ending with the
4214 first non-hexadecimal character or end-of-string." This means that the first
4215 non-hex character terminates the conversion and this is the code that was
4218 Fixed a problem where the ObjectType operator would fail (fault) when used
4219 on an Index of a Package which pointed to a null package element. The
4220 operator now properly returns zero (Uninitialized) in this case.
4222 Fixed a problem where the While operator used excessive memory by not
4223 properly popping the result stack during execution. There was no memory leak
4224 after execution, however. (Code provided by Valery Podrezov.)
4226 Fixed a problem where references to control methods within Package objects
4227 caused the method to be invoked, instead of producing a reference object
4228 pointing to the method.
4230 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
4231 improve performance and reduce code size. (Code provided by Alexey
4234 Code and Data Size: Current and previous core subsystem library sizes are
4235 shown below. These are the code and data sizes for the acpica.lib produced
4236 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4237 any ACPI driver or OSPM code. The debug version of the code includes the
4238 debug output trace mechanism and has a much larger code and data size. Note
4239 that these values will vary depending on the efficiency of the compiler and
4240 the compiler options used during generation.
4243 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4244 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4246 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4247 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4250 2) iASL Compiler/Disassembler:
4252 Fixed a problem with the Return operator with no arguments. Since the AML
4253 grammar for the byte encoding requires an operand for the Return opcode, the
4254 compiler now emits a Return(Zero) for this case. An ACPI specification
4255 update has been written for this case.
4257 For tables other than the DSDT, namepath optimization is automatically
4258 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
4259 compiler has no knowledge of where, and thus cannot optimize namepaths.
4261 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
4262 inadvertently omitted from the ACPI specification, and will require an
4265 The source file scan for ASCII characters is now optional (-a). This change
4266 was made because some vendors place non-ascii characters within comments.
4267 However, the scan is simply a brute-force byte compare to ensure all
4268 characters in the file are in the range 0x00 to 0x7F.
4270 Fixed a problem with the CondRefOf operator where the compiler was
4271 inappropriately checking for the existence of the target. Since the point of
4272 the operator is to check for the existence of the target at run-time, the
4273 compiler no longer checks for the target existence.
4275 Fixed a problem where errors generated from the internal AML interpreter
4276 during constant folding were not handled properly, causing a fault.
4278 Fixed a problem with overly aggressive range checking for the Stall
4279 operator. The valid range (max 255) is now only checked if the operand is of
4280 type Integer. All other operand types cannot be statically checked.
4282 Fixed a problem where control method references within the RefOf, DeRefOf,
4283 and ObjectType operators were not treated properly. They are now treated as
4284 actual references, not method invocations.
4286 Fixed and enhanced the "list namespace" option (-ln). This option was broken
4287 a number of releases ago.
4289 Improved error handling for the Field, IndexField, and BankField operators.
4290 The compiler now cleanly reports and recovers from errors in the field
4291 component (FieldUnit) list.
4293 Fixed a disassembler problem where the optional ResourceDescriptor fields
4294 TRS and TTP were not always handled correctly.
4296 Disassembler - Comments in output now use "//" instead of "/*"
4298 ----------------------------------------
4299 28 February 2005. Summary of changes for version 20050228:
4301 1) ACPI CA Core Subsystem:
4303 Fixed a problem where the result of an Index() operator (an object
4304 reference) must increment the reference count on the target object for the
4305 life of the object reference.
4307 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
4308 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
4309 resource descriptors.
4311 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
4312 Space Descriptor" string, indicating interpreter support for the descriptors
4315 Implemented header support for the new ACPI 3.0 FADT flag bits.
4317 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
4318 status/enable registers.
4320 Updated header support for the MADT processor local Apic struct and MADT
4321 platform interrupt source struct for new ACPI 3.0 fields.
4323 Implemented header support for the SRAT and SLIT ACPI tables.
4325 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
4328 Code and Data Size: Current and previous core subsystem library sizes are
4329 shown below. These are the code and data sizes for the acpica.lib produced
4330 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4331 any ACPI driver or OSPM code. The debug version of the code includes the
4332 debug output trace mechanism and has a much larger code and data size. Note
4333 that these values will vary depending on the efficiency of the compiler and
4334 the compiler options used during generation.
4337 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4338 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4340 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4341 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4344 2) iASL Compiler/Disassembler:
4346 Fixed a problem with the internal 64-bit String-to-integer conversion with
4347 strings less than two characters long.
4349 Fixed a problem with constant folding where the result of the Index()
4350 operator can not be considered a constant. This means that Index() cannot be
4351 a type3 opcode and this will require an update to the ACPI specification.
4353 Disassembler: Implemented support for the TTP, MTP, and TRS resource
4354 descriptor fields. These fields were inadvertently ignored and not output in
4355 the disassembly of the resource descriptor.
4358 ----------------------------------------
4359 11 February 2005. Summary of changes for version 20050211:
4361 1) ACPI CA Core Subsystem:
4363 Implemented ACPI 3.0 support for implicit conversion within the Match()
4364 operator. MatchObjects can now be of type integer, buffer, or string instead
4365 of just type integer. Package elements are implicitly converted to the type
4366 of the MatchObject. This change aligns the behavior of Match() with the
4367 behavior of the other logical operators (LLess(), etc.) It also requires an
4368 errata change to the ACPI specification as this support was intended for
4369 ACPI 3.0, but was inadvertently omitted.
4371 Fixed a problem with the internal implicit "to buffer" conversion. Strings
4372 that are converted to buffers will cause buffer truncation if the string is
4373 smaller than the target buffer. Integers that are converted to buffers will
4374 not cause buffer truncation, only zero extension (both as per the ACPI
4375 spec.) The problem was introduced when code was added to truncate the
4376 buffer, but this should not be performed in all cases, only the string case.
4378 Fixed a problem with the Buffer and Package operators where the interpreter
4379 would get confused if two such operators were used as operands to an ASL
4380 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
4381 stack was not being popped after the execution of these operators, resulting
4382 in an AE_NO_RETURN_VALUE exception.
4384 Fixed a problem with constructs of the form Store(Index(...),...). The
4385 reference object returned from Index was inadvertently resolved to an actual
4386 value. This problem was introduced in version 20050114 when the behavior of
4387 Store() was modified to restrict the object types that can be used as the
4388 source operand (to match the ACPI specification.)
4390 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
4392 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
4394 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
4396 Code and Data Size: Current and previous core subsystem library sizes are
4397 shown below. These are the code and data sizes for the acpica.lib produced
4398 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4399 any ACPI driver or OSPM code. The debug version of the code includes the
4400 debug output trace mechanism and has a much larger code and data size. Note
4401 that these values will vary depending on the efficiency of the compiler and
4402 the compiler options used during generation.
4405 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4406 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4408 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4409 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4412 2) iASL Compiler/Disassembler:
4414 Fixed a code generation problem in the constant folding optimization code
4415 where incorrect code was generated if a constant was reduced to a buffer
4416 object (i.e., a reduced type 5 opcode.)
4418 Fixed a typechecking problem for the ToBuffer operator. Caused by an
4419 incorrect return type in the internal opcode information table.
4421 ----------------------------------------
4422 25 January 2005. Summary of changes for version 20050125:
4424 1) ACPI CA Core Subsystem:
4426 Fixed a recently introduced problem with the Global Lock where the
4427 underlying semaphore was not created. This problem was introduced in
4428 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
4429 Acquire() operation on _GL.
4431 The local object cache is now optional, and is disabled by default. Both
4432 AcpiExec and the iASL compiler enable the cache because they run in user
4433 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
4434 to enable the local cache.
4436 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
4437 optional "implicit return" support where an error was returned if no return
4438 object was expected, but one was implicitly returned. AE_OK is now returned
4439 in this case and the implicitly returned object is deleted.
4440 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
4441 methods such as _STA and _INI where the return type is known up front.
4443 Fixed a few issues with the internal convert-to-integer code. It now returns
4444 an error if an attempt is made to convert a null string, a string of only
4445 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
4446 and explicit conversion via the ToInteger() operator.
4448 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
4449 not needed for normal operation and should increase the performance of the
4450 entire subsystem. The code remains in case it is needed for debug purposes
4453 The AcpiExec source and makefile are included in the Unix/Linux package for
4456 Code and Data Size: Current and previous core subsystem library sizes are
4457 shown below. These are the code and data sizes for the acpica.lib produced
4458 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4459 any ACPI driver or OSPM code. The debug version of the code includes the
4460 debug output trace mechanism and has a much larger code and data size. Note
4461 that these values will vary depending on the efficiency of the compiler and
4462 the compiler options used during generation.
4465 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4466 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4468 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4469 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4471 2) iASL Compiler/Disassembler:
4473 Switch/Case support: A warning is now issued if the type of the Switch value
4474 cannot be determined at compile time. For example, Switch(Arg0) will
4475 generate the warning, and the type is assumed to be an integer. As per the
4476 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
4479 Switch/Case support: Implemented support for buffer and string objects as
4480 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
4481 buffers and strings.
4483 Switch/Case support: The emitted code for the LEqual() comparisons now uses
4484 the switch value as the first operand, not the second. The case value is now
4485 the second operand, and this allows the case value to be implicitly
4486 converted to the type of the switch value, not the other way around.
4488 Switch/Case support: Temporary variables are now emitted immediately within
4489 the control method, not at the global level. This means that there are now
4490 36 temps available per-method, not 36 temps per-module as was the case with
4491 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
4493 ----------------------------------------
4494 14 January 2005. Summary of changes for version 20050114:
4496 Added 2005 copyright to all module headers. This affects every module in
4497 the core subsystem, iASL compiler, and the utilities.
4499 1) ACPI CA Core Subsystem:
4501 Fixed an issue with the String-to-Buffer conversion code where the string
4502 null terminator was not included in the buffer after conversion, but there
4503 is existing ASL that assumes the string null terminator is included. This is
4504 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
4505 introduced in the previous version when the code was updated to correctly
4506 set the converted buffer size as per the ACPI specification. The ACPI spec
4507 is ambiguous and will be updated to specify that the null terminator must be
4508 included in the converted buffer. This also affects the ToBuffer() ASL
4511 Fixed a problem with the Mid() ASL/AML operator where it did not work
4512 correctly on Buffer objects. Newly created sub-buffers were not being marked
4516 Fixed a problem in AcpiTbFindTable where incorrect string compares were
4517 performed on the OemId and OemTableId table header fields. These fields are
4518 not null terminated, so strncmp is now used instead of strcmp.
4520 Implemented a restriction on the Store() ASL/AML operator to align the
4521 behavior with the ACPI specification. Previously, any object could be used
4522 as the source operand. Now, the only objects that may be used are Integers,
4523 Buffers, Strings, Packages, Object References, and DDB Handles. If
4524 necessary, the original behavior can be restored by enabling the
4525 EnableInterpreterSlack flag.
4527 Enhanced the optional "implicit return" support to allow an implicit return
4528 value from methods that are invoked externally via the AcpiEvaluateObject
4529 interface. This enables implicit returns from the _STA and _INI methods,
4532 Changed the Revision() ASL/AML operator to return the current version of the
4533 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
4534 the supported ACPI version (This is the function of the _REV method).
4536 Updated the _REV predefined method to return the currently supported version
4539 Implemented batch mode option for the AcpiExec utility (-b).
4541 Code and Data Size: Current and previous core subsystem library sizes are
4542 shown below. These are the code and data sizes for the acpica.lib produced
4543 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4544 any ACPI driver or OSPM code. The debug version of the code includes the
4545 debug output trace mechanism and has a much larger code and data size. Note
4546 that these values will vary depending on the efficiency of the compiler and
4547 the compiler options used during generation.
4550 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4551 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4553 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4554 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4556 ----------------------------------------
4557 10 December 2004. Summary of changes for version 20041210:
4559 ACPI 3.0 support is nearing completion in both the iASL compiler and the
4560 ACPI CA core subsystem.
4562 1) ACPI CA Core Subsystem:
4564 Fixed a problem in the ToDecimalString operator where the resulting string
4565 length was incorrectly calculated. The length is now calculated exactly,
4566 eliminating incorrect AE_STRING_LIMIT exceptions.
4568 Fixed a problem in the ToHexString operator to allow a maximum 200 character
4569 string to be produced.
4571 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
4572 routine where the length of the resulting buffer was not truncated to the
4573 new size (if the target buffer already existed).
4575 Code and Data Size: Current and previous core subsystem library sizes are
4576 shown below. These are the code and data sizes for the acpica.lib produced
4577 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4578 any ACPI driver or OSPM code. The debug version of the code includes the
4579 debug output trace mechanism and has a much larger code and data size. Note
4580 that these values will vary depending on the efficiency of the compiler and
4581 the compiler options used during generation.
4584 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4585 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4587 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4588 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4591 2) iASL Compiler/Disassembler:
4593 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
4594 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
4595 Includes support in the disassembler.
4597 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
4600 Fixed a problem where the _HE resource name for the Interrupt macro was
4601 referencing bit 0 instead of bit 1.
4603 Implemented check for maximum 255 interrupts in the Interrupt macro.
4605 Fixed a problem with the predefined resource descriptor names where
4606 incorrect AML code was generated if the offset within the resource buffer
4607 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
4608 but did not update the surrounding package lengths.
4610 Changes to the Dma macro: All channels within the channel list must be in
4611 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
4612 optional (default is BusMaster).
4614 Implemented check for maximum 7 data bytes for the VendorShort macro.
4616 The ReadWrite parameter is now optional for the Memory32 and similar macros.
4618 ----------------------------------------
4619 03 December 2004. Summary of changes for version 20041203:
4621 1) ACPI CA Core Subsystem:
4623 The low-level field insertion/extraction code (exfldio) has been completely
4624 rewritten to eliminate unnecessary complexity, bugs, and boundary
4627 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
4628 operators where the input operand could be inadvertently deleted if no
4629 conversion was necessary (e.g., if the input to ToInteger was an Integer
4632 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
4633 exception code was returned if the resulting string would be > 200 chars.
4634 AE_STRING_LIMIT is now returned.
4636 Fixed a problem with the Concatenate operator where AE_OK was always
4637 returned, even if the operation failed.
4639 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
4640 semaphores to be allocated.
4642 Code and Data Size: Current and previous core subsystem library sizes are
4643 shown below. These are the code and data sizes for the acpica.lib produced
4644 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4645 any ACPI driver or OSPM code. The debug version of the code includes the
4646 debug output trace mechanism and has a much larger code and data size. Note
4647 that these values will vary depending on the efficiency of the compiler and
4648 the compiler options used during generation.
4651 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4652 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4654 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4655 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4658 2) iASL Compiler/Disassembler:
4660 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
4661 recently introduced in 20041119.
4663 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
4664 byte was inadvertently set to zero.
4666 ----------------------------------------
4667 19 November 2004. Summary of changes for version 20041119:
4669 1) ACPI CA Core Subsystem:
4671 Fixed a problem in the internal ConvertToInteger routine where new integers
4672 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
4673 buffers and strings to integers.
4675 Implemented support to store a value to an Index() on a String object. This
4676 is an ACPI 2.0 feature that had not yet been implemented.
4678 Implemented new behavior for storing objects to individual package elements
4679 (via the Index() operator). The previous behavior was to invoke the implicit
4680 conversion rules if an object was already present at the index. The new
4681 behavior is to simply delete any existing object and directly store the new
4682 object. Although the ACPI specification seems unclear on this subject, other
4683 ACPI implementations behave in this manner. (This is the root of the
4684 AE_BAD_HEX_CONSTANT issue.)
4686 Modified the RSDP memory scan mechanism to support the extended checksum for
4687 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
4688 RSDP signature is found with a valid checksum.
4690 Code and Data Size: Current and previous core subsystem library sizes are
4691 shown below. These are the code and data sizes for the acpica.lib produced
4692 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4693 any ACPI driver or OSPM code. The debug version of the code includes the
4694 debug output trace mechanism and has a much larger code and data size. Note
4695 that these values will vary depending on the efficiency of the compiler and
4696 the compiler options used during generation.
4699 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4700 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4702 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4703 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4706 2) iASL Compiler/Disassembler:
4708 Fixed a missing semicolon in the aslcompiler.y file.
4710 ----------------------------------------
4711 05 November 2004. Summary of changes for version 20041105:
4713 1) ACPI CA Core Subsystem:
4715 Implemented support for FADT revision 2. This was an interim table (between
4716 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
4718 Implemented optional support to allow uninitialized LocalX and ArgX
4719 variables in a control method. The variables are initialized to an Integer
4720 object with a value of zero. This support is enabled by setting the
4721 AcpiGbl_EnableInterpreterSlack flag to TRUE.
4723 Implemented support for Integer objects for the SizeOf operator. Either 4
4724 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
4725 depending on the parent table revision).
4727 Fixed a problem in the implementation of the SizeOf and ObjectType operators
4728 where the operand was resolved to a value too early, causing incorrect
4729 return values for some objects.
4731 Fixed some possible memory leaks during exceptional conditions.
4733 Code and Data Size: Current and previous core subsystem library sizes are
4734 shown below. These are the code and data sizes for the acpica.lib produced
4735 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4736 any ACPI driver or OSPM code. The debug version of the code includes the
4737 debug output trace mechanism and has a much larger code and data size. Note
4738 that these values will vary depending on the efficiency of the compiler and
4739 the compiler options used during generation.
4742 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4743 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4745 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4746 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4749 2) iASL Compiler/Disassembler:
4751 Implemented support for all ACPI 3.0 reserved names and methods.
4753 Implemented all ACPI 3.0 grammar elements in the front-end, including
4754 support for semicolons.
4756 Implemented the ACPI 3.0 Function() and ToUUID() macros
4758 Fixed a problem in the disassembler where a Scope() operator would not be
4759 emitted properly if the target of the scope was in another table.
4761 ----------------------------------------
4762 15 October 2004. Summary of changes for version 20041015:
4764 Note: ACPI CA is currently undergoing an in-depth and complete formal
4765 evaluation to test/verify the following areas. Other suggestions are
4766 welcome. This will result in an increase in the frequency of releases and
4767 the number of bug fixes in the next few months.
4768 - Functional tests for all ASL/AML operators
4769 - All implicit/explicit type conversions
4770 - Bit fields and operation regions
4771 - 64-bit math support and 32-bit-only "truncated" math support
4772 - Exceptional conditions, both compiler and interpreter
4773 - Dynamic object deletion and memory leaks
4774 - ACPI 3.0 support when implemented
4775 - External interfaces to the ACPI subsystem
4778 1) ACPI CA Core Subsystem:
4780 Fixed two alignment issues on 64-bit platforms - within debug statements in
4781 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
4782 field within the non-aligned ACPI generic address structure.
4784 Fixed a problem in the Increment and Decrement operators where incorrect
4785 operand resolution could result in the inadvertent modification of the
4786 original integer when the integer is passed into another method as an
4787 argument and the arg is then incremented/decremented.
4789 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
4790 BCD number were truncated during conversion.
4792 Fixed a problem in the ToDecimal operator where the length of the resulting
4793 string could be set incorrectly too long if the input operand was a Buffer
4796 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
4797 within a buffer would prematurely terminate a compare between buffer
4800 Added a check for string overflow (>200 characters as per the ACPI
4801 specification) during the Concatenate operator with two string operands.
4803 Code and Data Size: Current and previous core subsystem library sizes are
4804 shown below. These are the code and data sizes for the acpica.lib produced
4805 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4806 any ACPI driver or OSPM code. The debug version of the code includes the
4807 debug output trace mechanism and has a much larger code and data size. Note
4808 that these values will vary depending on the efficiency of the compiler and
4809 the compiler options used during generation.
4812 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4813 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4815 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4816 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4820 2) iASL Compiler/Disassembler:
4822 Allow the use of the ObjectType operator on uninitialized Locals and Args
4823 (returns 0 as per the ACPI specification).
4825 Fixed a problem where the compiler would fault if there was a syntax error
4826 in the FieldName of all of the various CreateXXXField operators.
4828 Disallow the use of lower case letters within the EISAID macro, as per the
4829 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
4830 U is an uppercase letter and N is a hex digit.
4833 ----------------------------------------
4834 06 October 2004. Summary of changes for version 20041006:
4836 1) ACPI CA Core Subsystem:
4838 Implemented support for the ACPI 3.0 Timer operator. This ASL function
4839 implements a 64-bit timer with 100 nanosecond granularity.
4841 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
4842 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
4843 the timer with the best clock available. Also, it keeps the core subsystem
4844 out of the clock handling business, since the host OS (usually) performs
4847 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
4848 functions use a 64-bit address which is part of the packed ACPI Generic
4849 Address Structure. Since the structure is non-aligned, the alignment macros
4850 are now used to extract the address to a local variable before use.
4852 Fixed a problem where the ToInteger operator assumed all input strings were
4853 hexadecimal. The operator now handles both decimal strings and hex strings
4854 (prefixed with "0x").
4856 Fixed a problem where the string length in the string object created as a
4857 result of the internal ConvertToString procedure could be incorrect. This
4858 potentially affected all implicit conversions and also the ToDecimalString
4859 and ToHexString operators.
4861 Fixed two problems in the ToString operator. If the length parameter was
4862 zero, an incorrect string object was created and the value of the input
4863 length parameter was inadvertently changed from zero to Ones.
4865 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
4866 resource macro was ignored.
4868 Simplified the interfaces to the internal division functions, reducing code
4869 size and complexity.
4871 Code and Data Size: Current and previous core subsystem library sizes are
4872 shown below. These are the code and data sizes for the acpica.lib produced
4873 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4874 any ACPI driver or OSPM code. The debug version of the code includes the
4875 debug output trace mechanism and has a much larger code and data size. Note
4876 that these values will vary depending on the efficiency of the compiler and
4877 the compiler options used during generation.
4880 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4881 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4883 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4884 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4887 2) iASL Compiler/Disassembler:
4889 Implemented support for the ACPI 3.0 Timer operator.
4891 Fixed a problem where the Default() operator was inadvertently ignored in a
4892 Switch/Case block. This was a problem in the translation of the Switch
4893 statement to If...Else pairs.
4895 Added support to allow a standalone Return operator, with no parentheses (or
4898 Fixed a problem with code generation for the ElseIf operator where the
4899 translated Else...If parse tree was improperly constructed leading to the
4902 ----------------------------------------
4903 22 September 2004. Summary of changes for version 20040922:
4905 1) ACPI CA Core Subsystem:
4907 Fixed a problem with the implementation of the LNot() operator where "Ones"
4908 was not returned for the TRUE case. Changed the code to return Ones instead
4909 of (!Arg) which was usually 1. This change affects iASL constant folding for
4912 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
4913 initialized properly -- Now zero the entire buffer in this case where the
4914 buffer already exists.
4916 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
4917 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
4918 related code considerably. This will require changes/updates to all OS
4919 interface layers (OSLs.)
4921 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
4922 a system exception handler to be installed. This handler is invoked upon any
4923 run-time exception that occurs during control method execution.
4925 Added support for the DSDT in AcpiTbFindTable. This allows the
4926 DataTableRegion() operator to access the local copy of the DSDT.
4928 Code and Data Size: Current and previous core subsystem library sizes are
4929 shown below. These are the code and data sizes for the acpica.lib produced
4930 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4931 any ACPI driver or OSPM code. The debug version of the code includes the
4932 debug output trace mechanism and has a much larger code and data size. Note
4933 that these values will vary depending on the efficiency of the compiler and
4934 the compiler options used during generation.
4937 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4938 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4940 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4941 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4944 2) iASL Compiler/Disassembler:
4946 Fixed a problem with constant folding and the LNot operator. LNot was
4947 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
4948 could result in the generation of an incorrect folded/reduced constant.
4950 End-Of-File is now allowed within a "//"-style comment. A parse error no
4951 longer occurs if such a comment is at the very end of the input ASL source
4954 Implemented the "-r" option to override the Revision in the table header.
4955 The initial use of this option will be to simplify the evaluation of the AML
4956 interpreter by allowing a single ASL source module to be compiled for either
4957 32-bit or 64-bit integers.
4960 ----------------------------------------
4961 27 August 2004. Summary of changes for version 20040827:
4963 1) ACPI CA Core Subsystem:
4965 - Implemented support for implicit object conversion in the non-numeric
4966 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
4967 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
4968 the second operand is implicitly converted on the fly to match the type of
4969 the first operand. For example:
4971 LEqual (Source1, Source2)
4973 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
4974 The data type of Source1 dictates the required type of Source2. Source2 is
4975 implicitly converted if necessary to match the type of Source1.
4977 - Updated and corrected the behavior of the string conversion support. The
4978 rules concerning conversion of buffers to strings (according to the ACPI
4979 specification) are as follows:
4981 ToDecimalString - explicit byte-wise conversion of buffer to string of
4982 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
4983 conversion of buffer to string of hex values (0-FF) separated by commas.
4984 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
4985 copy with no transform except NULL terminated. Any other implicit buffer-to-
4986 string conversion - byte-wise conversion of buffer to string of hex values
4987 (0-FF) separated by spaces.
4989 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
4991 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
4992 one byte too short in the case of a node in the root scope. This could
4993 cause a fault during debug output.
4995 - Code and Data Size: Current and previous core subsystem library sizes are
4996 shown below. These are the code and data sizes for the acpica.lib produced
4997 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4998 any ACPI driver or OSPM code. The debug version of the code includes the
4999 debug output trace mechanism and has a much larger code and data size. Note
5000 that these values will vary depending on the efficiency of the compiler and
5001 the compiler options used during generation.
5004 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5005 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5007 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
5008 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
5011 2) iASL Compiler/Disassembler:
5013 - Fixed a Linux generation error.
5016 ----------------------------------------
5017 16 August 2004. Summary of changes for version 20040816:
5019 1) ACPI CA Core Subsystem:
5021 Designed and implemented support within the AML interpreter for the so-
5022 called "implicit return". This support returns the result of the last ASL
5023 operation within a control method, in the absence of an explicit Return()
5024 operator. A few machines depend on this behavior, even though it is not
5025 explicitly supported by the ASL language. It is optional support that can
5026 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
5028 Removed support for the PCI_Config address space from the internal low level
5029 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
5030 support was not used internally, and would not work correctly anyway because
5031 the PCI bus number and segment number were not supported. There are
5032 separate interfaces for PCI configuration space access because of the unique
5035 Code and Data Size: Current and previous core subsystem library sizes are
5036 shown below. These are the code and data sizes for the acpica.lib produced
5037 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5038 any ACPI driver or OSPM code. The debug version of the code includes the
5039 debug output trace mechanism and has a much larger code and data size. Note
5040 that these values will vary depending on the efficiency of the compiler and
5041 the compiler options used during generation.
5044 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5045 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5047 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5048 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5051 2) iASL Compiler/Disassembler:
5053 Fixed a problem where constants in ASL expressions at the root level (not
5054 within a control method) could be inadvertently truncated during code
5055 generation. This problem was introduced in the 20040715 release.
5058 ----------------------------------------
5059 15 July 2004. Summary of changes for version 20040715:
5061 1) ACPI CA Core Subsystem:
5063 Restructured the internal HW GPE interfaces to pass/track the current state
5064 of interrupts (enabled/disabled) in order to avoid possible deadlock and
5065 increase flexibility of the interfaces.
5067 Implemented a "lexicographical compare" for String and Buffer objects within
5068 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
5069 as per further clarification to the ACPI specification. Behavior is similar
5070 to C library "strcmp".
5072 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
5073 external function. In the 32-bit non-debug case, the stack use has been
5074 reduced from 168 bytes to 32 bytes.
5076 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
5077 whose purpose is to allow the AML interpreter to forgive certain bad AML
5078 constructs. Default setting is FALSE.
5080 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
5081 support code. If enabled, it allows field access to go beyond the end of a
5082 region definition if the field is within the region length rounded up to the
5083 next access width boundary (a common coding error.)
5085 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
5086 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
5087 symbols are lowercased by the latest version of the AcpiSrc tool.
5089 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
5090 rename "Register" to simply "Reg" to prevent certain compilers from
5093 Code and Data Size: Current and previous core subsystem library sizes are
5094 shown below. These are the code and data sizes for the acpica.lib produced
5095 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5096 any ACPI driver or OSPM code. The debug version of the code includes the
5097 debug output trace mechanism and has a much larger code and data size. Note
5098 that these values will vary depending on the efficiency of the compiler and
5099 the compiler options used during generation.
5102 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5103 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5105 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5106 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5109 2) iASL Compiler/Disassembler:
5111 Implemented full support for Package objects within the Case() operator.
5112 Note: The Break() operator is currently not supported within Case blocks
5113 (TermLists) as there is some question about backward compatibility with ACPI
5117 Fixed a problem where complex terms were not supported properly within the
5120 Eliminated extraneous warning for compiler-emitted reserved names of the
5121 form "_T_x". (Used in Switch/Case operators.)
5123 Eliminated optimization messages for "_T_x" objects and small constants
5124 within the DefinitionBlock operator.
5127 ----------------------------------------
5128 15 June 2004. Summary of changes for version 20040615:
5130 1) ACPI CA Core Subsystem:
5132 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5133 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5136 All directory names in the entire source package are lower case, as they
5137 were in earlier releases.
5139 Implemented "Disassemble" command in the AML debugger that will disassemble
5140 a single control method.
5142 Code and Data Size: Current and previous core subsystem library sizes are
5143 shown below. These are the code and data sizes for the acpica.lib produced
5144 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5145 any ACPI driver or OSPM code. The debug version of the code includes the
5146 debug output trace mechanism and has a much larger code and data size. Note
5147 that these values will vary depending on the efficiency of the compiler and
5148 the compiler options used during generation.
5151 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5152 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5155 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5156 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5159 2) iASL Compiler/Disassembler:
5161 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5162 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5165 All directory names in the entire source package are lower case, as they
5166 were in earlier releases.
5168 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
5171 Fixed an issue with the Windows version of the compiler where later versions
5172 of Windows place the FADT in the registry under the name "FADT" and not
5173 "FACP" as earlier versions did. This applies when using the -g or -
5174 d<nofilename> options. The compiler now looks for both strings as
5177 Fixed a problem with compiler namepath optimization where a namepath within
5178 the Scope() operator could not be optimized if the namepath was a subpath of
5179 the current scope path.
5181 ----------------------------------------
5182 27 May 2004. Summary of changes for version 20040527:
5184 1) ACPI CA Core Subsystem:
5186 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
5187 support in the RSDP scan code. The original code improperly scanned for the
5188 EBDA by simply scanning from memory location 0 to 0x400. The correct method
5189 is to first obtain the EBDA pointer from within the BIOS data area, then
5190 scan 1K of memory starting at the EBDA pointer. There appear to be few if
5191 any machines that place the RSDP in the EBDA, however.
5193 Integrated a fix for a possible fault during evaluation of BufferField
5194 arguments. Obsolete code that was causing the problem was removed.
5196 Found and fixed a problem in the Field Support Code where data could be
5197 corrupted on a bit field read that starts on an aligned boundary but does
5198 not end on an aligned boundary. Merged the read/write "datum length"
5199 calculation code into a common procedure.
5201 Rolled in a couple of changes to the FreeBSD-specific header.
5204 Code and Data Size: Current and previous core subsystem library sizes are
5205 shown below. These are the code and data sizes for the acpica.lib produced
5206 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5207 any ACPI driver or OSPM code. The debug version of the code includes the
5208 debug output trace mechanism and has a much larger code and data size. Note
5209 that these values will vary depending on the efficiency of the compiler and
5210 the compiler options used during generation.
5213 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5214 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5216 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5217 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5220 2) iASL Compiler/Disassembler:
5222 Fixed a generation warning produced by some overly-verbose compilers for a
5225 ----------------------------------------
5226 14 May 2004. Summary of changes for version 20040514:
5228 1) ACPI CA Core Subsystem:
5230 Fixed a problem where hardware GPE enable bits sometimes not set properly
5231 during and after GPE method execution. Result of 04/27 changes.
5233 Removed extra "clear all GPEs" when sleeping/waking.
5235 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
5236 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
5237 the new AcpiEv* calls as appropriate.
5239 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
5240 now "Microsoft Windows NT" for maximum compatibility. However this can be
5241 changed by modifying the acconfig.h file.
5243 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
5244 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
5246 Run _INI methods on ThermalZone objects. This is against the ACPI
5247 specification, but there is apparently ASL code in the field that has these
5248 _INI methods, and apparently "other" AML interpreters execute them.
5250 Performed a full 16/32/64 bit lint that resulted in some small changes.
5252 Added a sleep simulation command to the AML debugger to test sleep code.
5254 Code and Data Size: Current and previous core subsystem library sizes are
5255 shown below. These are the code and data sizes for the acpica.lib produced
5256 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5257 any ACPI driver or OSPM code. The debug version of the code includes the
5258 debug output trace mechanism and has a much larger code and data size. Note
5259 that these values will vary depending on the efficiency of the compiler and
5260 the compiler options used during generation.
5263 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5264 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5266 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5267 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5269 ----------------------------------------
5270 27 April 2004. Summary of changes for version 20040427:
5272 1) ACPI CA Core Subsystem:
5274 Completed a major overhaul of the GPE handling within ACPI CA. There are
5275 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
5276 The only GPEs allowed to be combination wake/run are for button-style
5277 devices such as a control-method power button, control-method sleep button,
5278 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
5279 referenced by any _PRW methods are marked for "runtime" and hardware
5280 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
5281 (and disabled at runtime). However, at sleep time, only those GPEs that
5282 have been specifically enabled for wake via the AcpiEnableGpe interface will
5283 actually be hardware enabled.
5285 A new external interface has been added, AcpiSetGpeType(), that is meant to
5286 be used by device drivers to force a GPE to a particular type. It will be
5287 especially useful for the drivers for the button devices mentioned above.
5289 Completed restructuring of the ACPI CA initialization sequence so that
5290 default operation region handlers are installed before GPEs are initialized
5291 and the _PRW methods are executed. This will prevent errors when the _PRW
5292 methods attempt to access system memory or I/O space.
5294 GPE enable/disable no longer reads the GPE enable register. We now keep the
5295 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
5296 thus no longer depend on the hardware to maintain these bits.
5298 Always clear the wake status and fixed/GPE status bits before sleep, even
5301 Improved the AML debugger output for displaying the GPE blocks and their
5304 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
5307 Fixed a problem where the physical address was incorrectly calculated when
5308 the Load() operator was used to directly load from an Operation Region (vs.
5309 loading from a Field object.) Also added check for minimum table length for
5312 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
5315 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
5316 consistency with the other fields returned.
5318 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
5319 structure for each GPE in the system, so the size of this structure is
5322 CPU stack requirement reduction: Cleaned up the method execution and object
5323 evaluation paths so that now a parameter structure is passed, instead of
5324 copying the various method parameters over and over again.
5326 In evregion.c: Correctly exit and reenter the interpreter region if and
5327 only if dispatching an operation region request to a user-installed handler.
5328 Do not exit/reenter when dispatching to a default handler (e.g., default
5329 system memory or I/O handlers)
5332 Notes for updating drivers for the new GPE support. The following changes
5333 must be made to ACPI-related device drivers that are attached to one or more
5334 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
5336 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
5337 explicitly call AcpiEnableGpe.
5338 2) There is a new interface called AcpiSetGpeType. This should be called
5339 before enabling the GPE. Also, this interface will automatically disable
5340 the GPE if it is currently enabled.
5341 3) AcpiEnableGpe no longer supports a GPE type flag.
5343 Specific drivers that must be changed:
5345 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
5346 AeGpeHandler, NULL);
5347 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
5348 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
5350 2) Button Drivers (Power, Lid, Sleep):
5351 Run _PRW method under parent device
5352 If _PRW exists: /* This is a control-method button */
5353 Extract GPE number and possibly GpeDevice
5354 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
5355 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
5357 For all other devices that have _PRWs, we automatically set the GPE type to
5358 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
5359 must be done on a selective basis, usually requiring some kind of user app
5360 to allow the user to pick the wake devices.
5363 Code and Data Size: Current and previous core subsystem library sizes are
5364 shown below. These are the code and data sizes for the acpica.lib produced
5365 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5366 any ACPI driver or OSPM code. The debug version of the code includes the
5367 debug output trace mechanism and has a much larger code and data size. Note
5368 that these values will vary depending on the efficiency of the compiler and
5369 the compiler options used during generation.
5372 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5373 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5376 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5377 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5381 ----------------------------------------
5382 02 April 2004. Summary of changes for version 20040402:
5384 1) ACPI CA Core Subsystem:
5386 Fixed an interpreter problem where an indirect store through an ArgX
5387 parameter was incorrectly applying the "implicit conversion rules" during
5388 the store. From the ACPI specification: "If the target is a method local or
5389 argument (LocalX or ArgX), no conversion is performed and the result is
5390 stored directly to the target". The new behavior is to disable implicit
5391 conversion during ALL stores to an ArgX.
5393 Changed the behavior of the _PRW method scan to ignore any and all errors
5394 returned by a given _PRW. This prevents the scan from aborting from the
5395 failure of any single _PRW.
5397 Moved the runtime configuration parameters from the global init procedure to
5398 static variables in acglobal.h. This will allow the host to override the
5399 default values easily.
5401 Code and Data Size: Current and previous core subsystem library sizes are
5402 shown below. These are the code and data sizes for the acpica.lib produced
5403 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5404 any ACPI driver or OSPM code. The debug version of the code includes the
5405 debug output trace mechanism and has a much larger code and data size. Note
5406 that these values will vary depending on the efficiency of the compiler and
5407 the compiler options used during generation.
5410 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5411 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5413 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5414 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5417 2) iASL Compiler/Disassembler:
5419 iASL now fully disassembles SSDTs. However, External() statements are not
5420 generated automatically for unresolved symbols at this time. This is a
5421 planned feature for future implementation.
5423 Fixed a scoping problem in the disassembler that occurs when the type of the
5424 target of a Scope() operator is overridden. This problem caused an
5425 incorrectly nested internal namespace to be constructed.
5427 Any warnings or errors that are emitted during disassembly are now commented
5428 out automatically so that the resulting file can be recompiled without any
5431 ----------------------------------------
5432 26 March 2004. Summary of changes for version 20040326:
5434 1) ACPI CA Core Subsystem:
5436 Implemented support for "wake" GPEs via interaction between GPEs and the
5437 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
5438 identified as a WAKE GPE and by default will no longer be enabled at
5439 runtime. Previously, we were blindly enabling all GPEs with a corresponding
5440 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
5441 believe this has been the cause of thousands of "spurious" GPEs on some
5444 This new GPE behavior is can be reverted to the original behavior (enable
5445 ALL GPEs at runtime) via a runtime flag.
5447 Fixed a problem where aliased control methods could not access objects
5448 properly. The proper scope within the namespace was not initialized
5449 (transferred to the target of the aliased method) before executing the
5452 Fixed a potential race condition on internal object deletion on the return
5453 object in AcpiEvaluateObject.
5455 Integrated a fix for resource descriptors where both _MEM and _MTP were
5456 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5457 wide, 0x0F instead of 0x03.)
5459 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
5460 fault in some cases.
5462 Updated Notify() values for debug statements in evmisc.c
5464 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
5466 Code and Data Size: Current and previous core subsystem library sizes are
5467 shown below. These are the code and data sizes for the acpica.lib produced
5468 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5469 any ACPI driver or OSPM code. The debug version of the code includes the
5470 debug output trace mechanism and has a much larger code and data size. Note
5471 that these values will vary depending on the efficiency of the compiler and
5472 the compiler options used during generation.
5476 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5477 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5479 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5480 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5482 ----------------------------------------
5483 11 March 2004. Summary of changes for version 20040311:
5485 1) ACPI CA Core Subsystem:
5487 Fixed a problem where errors occurring during the parse phase of control
5488 method execution did not abort cleanly. For example, objects created and
5489 installed in the namespace were not deleted. This caused all subsequent
5490 invocations of the method to return the AE_ALREADY_EXISTS exception.
5492 Implemented a mechanism to force a control method to "Serialized" execution
5493 if the method attempts to create namespace objects. (The root of the
5494 AE_ALREADY_EXISTS problem.)
5496 Implemented support for the predefined _OSI "internal" control method.
5497 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
5498 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
5499 This feature will allow "other" operating systems to execute the fully
5500 tested, "Windows" code path through the ASL code
5502 Global Lock Support: Now allows multiple acquires and releases with any
5503 internal thread. Removed concept of "owning thread" for this special mutex.
5505 Fixed two functions that were inappropriately declaring large objects on the
5506 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
5507 method execution considerably.
5509 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
5510 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
5512 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
5513 defined on the machine.
5515 Implemented two runtime options: One to force all control method execution
5516 to "Serialized" to mimic Windows behavior, another to disable _OSI support
5517 if it causes problems on a given machine.
5519 Code and Data Size: Current and previous core subsystem library sizes are
5520 shown below. These are the code and data sizes for the acpica.lib produced
5521 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5522 any ACPI driver or OSPM code. The debug version of the code includes the
5523 debug output trace mechanism and has a much larger code and data size. Note
5524 that these values will vary depending on the efficiency of the compiler and
5525 the compiler options used during generation.
5528 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5529 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5531 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5532 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5534 2) iASL Compiler/Disassembler:
5536 Fixed an array size problem for FreeBSD that would cause the compiler to
5539 ----------------------------------------
5540 20 February 2004. Summary of changes for version 20040220:
5543 1) ACPI CA Core Subsystem:
5545 Implemented execution of _SxD methods for Device objects in the
5546 GetObjectInfo interface.
5548 Fixed calls to _SST method to pass the correct arguments.
5550 Added a call to _SST on wake to restore to "working" state.
5552 Check for End-Of-Buffer failure case in the WalkResources interface.
5554 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
5555 structures to the beginning of the file.
5557 After wake, clear GPE status register(s) before enabling GPEs.
5559 After wake, clear/enable power button. (Perhaps we should clear/enable all
5560 fixed events upon wake.)
5562 Fixed a couple of possible memory leaks in the Namespace manager.
5564 Integrated latest acnetbsd.h file.
5566 ----------------------------------------
5567 11 February 2004. Summary of changes for version 20040211:
5570 1) ACPI CA Core Subsystem:
5572 Completed investigation and implementation of the call-by-reference
5573 mechanism for control method arguments.
5575 Fixed a problem where a store of an object into an indexed package could
5576 fail if the store occurs within a different method than the method that
5577 created the package.
5579 Fixed a problem where the ToDecimal operator could return incorrect results.
5581 Fixed a problem where the CopyObject operator could fail on some of the more
5582 obscure objects (e.g., Reference objects.)
5584 Improved the output of the Debug object to display buffer, package, and
5587 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
5588 the expected result.
5590 Added permanent ACPI_REPORT_ERROR macros for all instances of the
5591 ACPI_AML_INTERNAL exception.
5593 Integrated latest version of acfreebsd.h
5595 ----------------------------------------
5596 16 January 2004. Summary of changes for version 20040116:
5598 The purpose of this release is primarily to update the copyright years in
5599 each module, thus causing a huge number of diffs. There are a few small
5600 functional changes, however.
5602 1) ACPI CA Core Subsystem:
5604 Improved error messages when there is a problem finding one or more of the
5605 required base ACPI tables
5607 Reintroduced the definition of APIC_HEADER in actbl.h
5609 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
5611 Removed extraneous reference to NewObj in dsmthdat.c
5615 Fixed a problem introduced in December that disabled the correct disassembly
5616 of Resource Templates
5619 ----------------------------------------
5620 03 December 2003. Summary of changes for version 20031203:
5622 1) ACPI CA Core Subsystem:
5624 Changed the initialization of Operation Regions during subsystem
5625 init to perform two entire walks of the ACPI namespace; The first
5626 to initialize the regions themselves, the second to execute the
5627 _REG methods. This fixed some interdependencies across _REG
5628 methods found on some machines.
5630 Fixed a problem where a Store(Local0, Local1) could simply update
5631 the object reference count, and not create a new copy of the
5632 object if the Local1 is uninitialized.
5634 Implemented support for the _SST reserved method during sleep
5637 Implemented support to clear the SLP_TYP and SLP_EN bits when
5638 waking up, this is apparently required by some machines.
5640 When sleeping, clear the wake status only if SleepState is not S5.
5642 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
5643 pointer arithmetic advanced a string pointer too far.
5645 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
5646 could be returned if the requested table has not been loaded.
5648 Within the support for IRQ resources, restructured the handling of
5649 the active and edge/level bits.
5651 Fixed a few problems in AcpiPsxExecute() where memory could be
5652 leaked under certain error conditions.
5654 Improved error messages for the cases where the ACPI mode could
5657 Code and Data Size: Current and previous core subsystem library
5658 sizes are shown below. These are the code and data sizes for the
5659 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5660 these values do not include any ACPI driver or OSPM code. The
5661 debug version of the code includes the debug output trace
5662 mechanism and has a much larger code and data size. Note that
5663 these values will vary depending on the efficiency of the compiler
5664 and the compiler options used during generation.
5666 Previous Release (20031029):
5667 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5668 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5670 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5671 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5673 2) iASL Compiler/Disassembler:
5675 Implemented a fix for the iASL disassembler where a bad index was
5676 generated. This was most noticeable on 64-bit platforms
5679 ----------------------------------------
5680 29 October 2003. Summary of changes for version 20031029:
5682 1) ACPI CA Core Subsystem:
5685 Fixed a problem where a level-triggered GPE with an associated
5686 _Lxx control method was incorrectly cleared twice.
5688 Fixed a problem with the Field support code where an access can
5689 occur beyond the end-of-region if the field is non-aligned but
5690 extends to the very end of the parent region (resulted in an
5691 AE_AML_REGION_LIMIT exception.)
5693 Fixed a problem with ACPI Fixed Events where an RT Clock handler
5694 would not get invoked on an RTC event. The RTC event bitmasks for
5695 the PM1 registers were not being initialized properly.
5697 Implemented support for executing _STA and _INI methods for
5698 Processor objects. Although this is currently not part of the
5699 ACPI specification, there is existing ASL code that depends on the
5700 init-time execution of these methods.
5702 Implemented and deployed a GetDescriptorName function to decode
5703 the various types of internal descriptors. Guards against null
5704 descriptors during debug output also.
5706 Implemented and deployed a GetNodeName function to extract the 4-
5707 character namespace node name. This function simplifies the debug
5708 and error output, as well as guarding against null pointers during
5711 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
5712 simplify the debug and error output of 64-bit integers. This
5713 macro replaces the HIDWORD and LODWORD macros for dumping these
5716 Updated the implementation of the Stall() operator to only call
5717 AcpiOsStall(), and also return an error if the operand is larger
5718 than 255. This preserves the required behavior of not
5719 relinquishing the processor, as would happen if AcpiOsSleep() was
5720 called for "long stalls".
5722 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
5723 initialized are now treated as NOOPs.
5725 Cleaned up a handful of warnings during 64-bit generation.
5727 Fixed a reported error where and incorrect GPE number was passed
5728 to the GPE dispatch handler. This value is only used for error
5729 output, however. Used this opportunity to clean up and streamline
5730 the GPE dispatch code.
5732 Code and Data Size: Current and previous core subsystem library
5733 sizes are shown below. These are the code and data sizes for the
5734 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5735 these values do not include any ACPI driver or OSPM code. The
5737 debug version of the code includes the debug output trace
5738 mechanism and has a much larger code and data size. Note that
5739 these values will vary depending on the efficiency of the compiler
5740 and the compiler options used during generation.
5742 Previous Release (20031002):
5743 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5744 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5746 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5747 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5750 2) iASL Compiler/Disassembler:
5752 Updated the iASL compiler to return an error if the operand to the
5753 Stall() operator is larger than 255.
5756 ----------------------------------------
5757 02 October 2003. Summary of changes for version 20031002:
5760 1) ACPI CA Core Subsystem:
5762 Fixed a problem with Index Fields where the index was not
5763 incremented for fields that require multiple writes to the
5764 index/data registers (Fields that are wider than the data
5767 Fixed a problem with all Field objects where a write could go
5768 beyond the end-of-field if the field was larger than the access
5769 granularity and therefore required multiple writes to complete the
5770 request. An extra write beyond the end of the field could happen
5773 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
5774 would incorrectly be returned if the width of the Data Register
5775 was larger than the specified field access width.
5777 Completed fixes for LoadTable() and Unload() and verified their
5778 operation. Implemented full support for the "DdbHandle" object
5779 throughout the ACPI CA subsystem.
5781 Implemented full support for the MADT and ECDT tables in the ACPI
5782 CA header files. Even though these tables are not directly
5783 consumed by ACPI CA, the header definitions are useful for ACPI
5786 Integrated resource descriptor fixes posted to the Linux ACPI
5787 list. This included checks for minimum descriptor length, and
5788 support for trailing NULL strings within descriptors that have
5789 optional string elements.
5791 Code and Data Size: Current and previous core subsystem library
5792 sizes are shown below. These are the code and data sizes for the
5793 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5794 these values do not include any ACPI driver or OSPM code. The
5795 debug version of the code includes the debug output trace
5796 mechanism and has a much larger code and data size. Note that
5797 these values will vary depending on the efficiency of the compiler
5798 and the compiler options used during generation.
5800 Previous Release (20030918):
5801 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5802 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5804 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5805 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5810 Implemented detection of non-ASCII characters within the input
5811 source ASL file. This catches attempts to compile binary (AML)
5812 files early in the compile, with an informative error message.
5814 Fixed a problem where the disassembler would fault if the output
5815 filename could not be generated or if the output file could not be
5818 ----------------------------------------
5819 18 September 2003. Summary of changes for version 20030918:
5822 1) ACPI CA Core Subsystem:
5824 Found and fixed a longstanding problem with the late execution of
5825 the various deferred AML opcodes (such as Operation Regions,
5826 Buffer Fields, Buffers, and Packages). If the name string
5827 specified for the name of the new object placed the object in a
5828 scope other than the current scope, the initialization/execution
5829 of the opcode failed. The solution to this problem was to
5830 implement a mechanism where the late execution of such opcodes
5831 does not attempt to lookup/create the name a second time in an
5832 incorrect scope. This fixes the "region size computed
5833 incorrectly" problem.
5835 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
5836 Global Lock AE_BAD_PARAMETER error.
5838 Fixed several 64-bit issues with prototypes, casting and data
5841 Removed duplicate prototype from acdisasm.h
5843 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
5845 Code and Data Size: Current and previous core subsystem library
5846 sizes are shown below. These are the code and data sizes for the
5847 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5848 these values do not include any ACPI driver or OSPM code. The
5849 debug version of the code includes the debug output trace
5850 mechanism and has a much larger code and data size. Note that
5851 these values will vary depending on the efficiency of the compiler
5852 and the compiler options used during generation.
5856 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5857 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5859 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5860 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5865 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
5866 correct sleep time in seconds.
5868 ----------------------------------------
5869 14 July 2003. Summary of changes for version 20030619:
5871 1) ACPI CA Core Subsystem:
5873 Parse SSDTs in order discovered, as opposed to reverse order
5876 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
5883 Dynamically allocate SDT list (suggested by Andi Kleen)
5885 proc function return value cleanups (Andi Kleen)
5887 Correctly handle NMI watchdog during long stalls (Andrew Morton)
5889 Make it so acpismp=force works (reported by Andrew Morton)
5892 ----------------------------------------
5893 19 June 2003. Summary of changes for version 20030619:
5895 1) ACPI CA Core Subsystem:
5897 Fix To/FromBCD, eliminating the need for an arch-specific #define.
5899 Do not acquire a semaphore in the S5 shutdown path.
5901 Fix ex_digits_needed for 0. (Takayoshi Kochi)
5903 Fix sleep/stall code reversal. (Andi Kleen)
5905 Revert a change having to do with control method calling
5910 acpiphp update (Takayoshi Kochi)
5912 Export acpi_disabled for sonypi (Stelian Pop)
5914 Mention acpismp=force in config help
5916 Re-add acpitable.c and acpismp=force. This improves backwards
5918 compatibility and also cleans up the code to a significant degree.
5920 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
5922 ----------------------------------------
5923 22 May 2003. Summary of changes for version 20030522:
5925 1) ACPI CA Core Subsystem:
5927 Found and fixed a reported problem where an AE_NOT_FOUND error
5928 occurred occasionally during _BST evaluation. This turned out to
5929 be an Owner ID allocation issue where a called method did not get
5930 a new ID assigned to it. Eventually, (after 64k calls), the Owner
5931 ID UINT16 would wraparound so that the ID would be the same as the
5932 caller's and the called method would delete the caller's
5935 Implemented extended error reporting for control methods that are
5936 aborted due to a run-time exception. Output includes the exact
5937 AML instruction that caused the method abort, a dump of the method
5938 locals and arguments at the time of the abort, and a trace of all
5939 nested control method calls.
5941 Modified the interpreter to allow the creation of buffers of zero
5942 length from the AML code. Implemented new code to ensure that no
5943 attempt is made to actually allocate a memory buffer (of length
5944 zero) - instead, a simple buffer object with a NULL buffer pointer
5945 and length zero is created. A warning is no longer issued when
5946 the AML attempts to create a zero-length buffer.
5948 Implemented a workaround for the "leading asterisk issue" in
5949 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
5950 asterisk is automatically removed if present in any HID, UID, or
5951 CID strings. The iASL compiler will still flag this asterisk as
5954 Implemented full support for _CID methods that return a package of
5955 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
5956 now additionally returns a device _CID list if present. This
5957 required a change to the external interface in order to pass an
5958 ACPI_BUFFER object as a parameter since the _CID list is of
5961 Fixed a problem with the new AE_SAME_HANDLER exception where
5962 handler initialization code did not know about this exception.
5964 Code and Data Size: Current and previous core subsystem library
5965 sizes are shown below. These are the code and data sizes for the
5966 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5967 these values do not include any ACPI driver or OSPM code. The
5968 debug version of the code includes the debug output trace
5969 mechanism and has a much larger code and data size. Note that
5970 these values will vary depending on the efficiency of the compiler
5971 and the compiler options used during generation.
5973 Previous Release (20030509):
5974 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5975 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5977 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5978 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5983 Fixed a bug in which we would reinitialize the ACPI interrupt
5984 after it was already working, thus disabling all ACPI and the IRQs
5985 for any other device sharing the interrupt. (Thanks to Stian
5988 Toshiba driver update (John Belmonte)
5990 Return only 0 or 1 for our interrupt handler status (Andrew
5996 Fixed a reported problem where multiple (nested) ElseIf()
5997 statements were not handled correctly by the compiler, resulting
5998 in incorrect warnings and incorrect AML code. This was a problem
5999 in both the ASL parser and the code generator.
6004 Added changes to existing interfaces, new exception codes, and new
6005 text concerning reference count object management versus garbage
6008 ----------------------------------------
6009 09 May 2003. Summary of changes for version 20030509.
6012 1) ACPI CA Core Subsystem:
6014 Changed the subsystem initialization sequence to hold off
6015 installation of address space handlers until the hardware has been
6016 initialized and the system has entered ACPI mode. This is because
6017 the installation of space handlers can cause _REG methods to be
6018 run. Previously, the _REG methods could potentially be run before
6019 ACPI mode was enabled.
6021 Fixed some memory leak issues related to address space handler and
6022 notify handler installation. There were some problems with the
6023 reference count mechanism caused by the fact that the handler
6024 objects are shared across several namespace objects.
6026 Fixed a reported problem where reference counts within the
6027 namespace were not properly updated when named objects created by
6028 method execution were deleted.
6030 Fixed a reported problem where multiple SSDTs caused a deletion
6031 issue during subsystem termination. Restructured the table data
6032 structures to simplify the linked lists and the related code.
6034 Fixed a problem where the table ID associated with secondary
6035 tables (SSDTs) was not being propagated into the namespace objects
6036 created by those tables. This would only present a problem for
6037 tables that are unloaded at run-time, however.
6039 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
6040 type as the length parameter (instead of UINT32).
6042 Solved a long-standing problem where an ALREADY_EXISTS error
6043 appears on various systems. This problem could happen when there
6044 are multiple PCI_Config operation regions under a single PCI root
6045 bus. This doesn't happen very frequently, but there are some
6046 systems that do this in the ASL.
6048 Fixed a reported problem where the internal DeleteNode function
6049 was incorrectly handling the case where a namespace node was the
6050 first in the parent's child list, and had additional peers (not
6051 the only child, but first in the list of children.)
6053 Code and Data Size: Current core subsystem library sizes are shown
6054 below. These are the code and data sizes for the acpica.lib
6055 produced by the Microsoft Visual C++ 6.0 compiler, and these
6056 values do not include any ACPI driver or OSPM code. The debug
6057 version of the code includes the debug output trace mechanism and
6058 has a much larger code and data size. Note that these values will
6059 vary depending on the efficiency of the compiler and the compiler
6060 options used during generation.
6063 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6064 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6066 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
6067 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
6072 Allow ":" in OS override string (Ducrot Bruno)
6074 Kobject fix (Greg KH)
6077 3 iASL Compiler/Disassembler:
6079 Fixed a problem in the generation of the C source code files (AML
6080 is emitted in C source statements for BIOS inclusion) where the
6081 Ascii dump that appears within a C comment at the end of each line
6082 could cause a compile time error if the AML sequence happens to
6083 have an open comment or close comment sequence embedded.
6086 ----------------------------------------
6087 24 April 2003. Summary of changes for version 20030424.
6090 1) ACPI CA Core Subsystem:
6092 Support for big-endian systems has been implemented. Most of the
6093 support has been invisibly added behind big-endian versions of the
6096 Fixed a problem in AcpiHwDisableGpeBlock() and
6097 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
6098 low level hardware write routine. The offset parameter was
6099 actually eliminated from the low level read/write routines because
6100 they had become obsolete.
6102 Fixed a problem where a handler object was deleted twice during
6103 the removal of a fixed event handler.
6108 A fix for SMP systems with link devices was contributed by
6112 (2.5) Return whether we handled the interrupt in our IRQ handler.
6113 (Linux ISRs no longer return void, so we can propagate the handler
6114 return value from the ACPI CA core back to the OS.)
6120 The ACPI CA Programmer Reference has been updated to reflect new
6121 interfaces and changes to existing interfaces.
6123 ----------------------------------------
6124 28 March 2003. Summary of changes for version 20030328.
6126 1) ACPI CA Core Subsystem:
6128 The GPE Block Device support has been completed. New interfaces
6129 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
6130 interfaces (enable, disable, clear, getstatus) have been split
6131 into separate interfaces for Fixed Events and General Purpose
6132 Events (GPEs) in order to support GPE Block Devices properly.
6134 Fixed a problem where the error message "Failed to acquire
6135 semaphore" would appear during operations on the embedded
6138 Code and Data Size: Current core subsystem library sizes are shown
6139 below. These are the code and data sizes for the acpica.lib
6140 produced by the Microsoft Visual C++ 6.0 compiler, and these
6141 values do not include any ACPI driver or OSPM code. The debug
6142 version of the code includes the debug output trace mechanism and
6143 has a much larger code and data size. Note that these values will
6144 vary depending on the efficiency of the compiler and the compiler
6145 options used during generation.
6148 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6149 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6151 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6152 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6155 ----------------------------------------
6156 28 February 2003. Summary of changes for version 20030228.
6159 1) ACPI CA Core Subsystem:
6161 The GPE handling and dispatch code has been completely overhauled
6162 in preparation for support of GPE Block Devices (ID ACPI0006).
6163 This affects internal data structures and code only; there should
6164 be no differences visible externally. One new file has been
6167 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
6168 fields that are used to determine the GPE block lengths. The
6169 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
6170 structures are ignored. This is per the ACPI specification but it
6171 isn't very clear. The full 256 Block 0/1 GPEs are now supported
6172 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
6174 In the SCI interrupt handler, removed the read of the PM1_CONTROL
6175 register to look at the SCI_EN bit. On some machines, this read
6176 causes an SMI event and greatly slows down SCI events. (This may
6177 in fact be the cause of slow battery status response on some
6180 Fixed a problem where a store of a NULL string to a package object
6181 could cause the premature deletion of the object. This was seen
6182 during execution of the battery _BIF method on some systems,
6183 resulting in no battery data being returned.
6185 Added AcpiWalkResources interface to simplify parsing of resource
6188 Code and Data Size: Current core subsystem library sizes are shown
6189 below. These are the code and data sizes for the acpica.lib
6190 produced by the Microsoft Visual C++ 6.0 compiler, and these
6191 values do not include any ACPI driver or OSPM code. The debug
6192 version of the code includes the debug output trace mechanism and
6193 has a much larger code and data size. Note that these values will
6194 vary depending on the efficiency of the compiler and the compiler
6195 options used during generation.
6198 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6199 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6201 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6202 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6207 S3 fixes (Ole Rohne)
6209 Update ACPI PHP driver with to use new acpi_walk_resource API
6212 Add S4BIOS support (Pavel Machek)
6214 Map in entire table before performing checksum (John Stultz)
6216 Expand the mem= cmdline to allow the specification of reserved and
6217 ACPI DATA blocks (Pavel Machek)
6219 Never use ACPI on VISWS
6221 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
6223 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
6224 causing us to think that some systems support C2 when they really
6227 Do not count processor objects for non-present CPUs (Thanks to
6233 Fixed a problem where ASL include files could not be found and
6236 Added support for the _PDC reserved name.
6239 ----------------------------------------
6240 22 January 2003. Summary of changes for version 20030122.
6243 1) ACPI CA Core Subsystem:
6245 Added a check for constructs of the form: Store (Local0, Local0)
6246 where Local0 is not initialized. Apparently, some BIOS
6247 programmers believe that this is a NOOP. Since this store doesn't
6248 do anything anyway, the new prototype behavior will ignore this
6249 error. This is a case where we can relax the strict checking in
6250 the interpreter in the name of compatibility.
6255 The AcpiSrc Source Conversion Utility has been released with the
6256 Linux package for the first time. This is the utility that is
6257 used to convert the ACPI CA base source code to the Linux version.
6259 (Both) Handle P_BLK lengths shorter than 6 more gracefully
6261 (Both) Move more headers to include/acpi, and delete an unused
6264 (Both) Move drivers/acpi/include directory to include/acpi
6266 (Both) Boot functions don't use cmdline, so don't pass it around
6268 (Both) Remove include of unused header (Adrian Bunk)
6270 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
6272 former now also includes the latter, acpiphp.h only needs the one,
6275 (2.5) Make it possible to select method of bios restoring after S3
6276 resume. [=> no more ugly ifdefs] (Pavel Machek)
6278 (2.5) Make proc write interfaces work (Pavel Machek)
6280 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
6282 (2.5) Break out ACPI Perf code into its own module, under cpufreq
6285 (2.4) S4BIOS support (Ducrot Bruno)
6287 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
6293 Added support to disassemble SSDT and PSDTs.
6295 Implemented support to obtain SSDTs from the Windows registry if
6299 ----------------------------------------
6300 09 January 2003. Summary of changes for version 20030109.
6302 1) ACPI CA Core Subsystem:
6304 Changed the behavior of the internal Buffer-to-String conversion
6305 function. The current ACPI specification states that the contents
6306 of the buffer are "converted to a string of two-character
6307 hexadecimal numbers, each separated by a space". Unfortunately,
6308 this definition is not backwards compatible with existing ACPI 1.0
6309 implementations (although the behavior was not defined in the ACPI
6310 1.0 specification). The new behavior simply copies data from the
6311 buffer to the string until a null character is found or the end of
6312 the buffer is reached. The new String object is always null
6313 terminated. This problem was seen during the generation of _BIF
6314 battery data where incorrect strings were returned for battery
6315 type, etc. This will also require an errata to the ACPI
6318 Renamed all instances of NATIVE_UINT and NATIVE_INT to
6319 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
6321 Copyright in all module headers (both Linux and non-Linux) has be
6324 Code and Data Size: Current core subsystem library sizes are shown
6325 below. These are the code and data sizes for the acpica.lib
6326 produced by the Microsoft Visual C++ 6.0 compiler, and these
6327 values do not include any ACPI driver or OSPM code. The debug
6328 version of the code includes the debug output trace mechanism and
6329 has a much larger code and data size. Note that these values will
6330 vary depending on the efficiency of the compiler and the compiler
6331 options used during generation.
6334 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6335 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6337 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6338 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6343 Fixed an oops on module insertion/removal (Matthew Tippett)
6345 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
6347 (2.5) Replace pr_debug (Randy Dunlap)
6349 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
6351 (Both) Eliminate spawning of thread from timer callback, in favor
6354 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
6356 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
6358 (Both) Add missing statics to button.c (Pavel Machek)
6360 Several changes have been made to the source code translation
6361 utility that generates the Linux Code in order to make the code
6364 All typedefs on structs and unions have been removed in keeping
6365 with the Linux coding style.
6367 Removed the non-Linux SourceSafe module revision number from each
6370 Completed major overhaul of symbols to be lowercased for linux.
6371 Doubled the number of symbols that are lowercased.
6373 Fixed a problem where identifiers within procedure headers and
6374 within quotes were not fully lower cased (they were left with a
6377 Some C macros whose only purpose is to allow the generation of 16-
6378 bit code are now completely removed in the Linux code, increasing
6379 readability and maintainability.
6381 ----------------------------------------
6383 12 December 2002. Summary of changes for version 20021212.
6386 1) ACPI CA Core Subsystem:
6388 Fixed a problem where the creation of a zero-length AML Buffer
6389 would cause a fault.
6391 Fixed a problem where a Buffer object that pointed to a static AML
6392 buffer (in an ACPI table) could inadvertently be deleted, causing
6395 Fixed a problem where a user buffer (passed in to the external
6396 ACPI CA interfaces) could be overwritten if the buffer was too
6397 small to complete the operation, causing memory corruption.
6399 Fixed a problem in the Buffer-to-String conversion code where a
6400 string of length one was always returned, regardless of the size
6401 of the input Buffer object.
6403 Removed the NATIVE_CHAR data type across the entire source due to
6404 lack of need and lack of consistent use.
6406 Code and Data Size: Current core subsystem library sizes are shown
6407 below. These are the code and data sizes for the acpica.lib
6408 produced by the Microsoft Visual C++ 6.0 compiler, and these
6409 values do not include any ACPI driver or OSPM code. The debug
6410 version of the code includes the debug output trace mechanism and
6411 has a much larger code and data size. Note that these values will
6412 vary depending on the efficiency of the compiler and the compiler
6413 options used during generation.
6416 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6417 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6419 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6420 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6423 ----------------------------------------
6424 05 December 2002. Summary of changes for version 20021205.
6426 1) ACPI CA Core Subsystem:
6428 Fixed a problem where a store to a String or Buffer object could
6429 cause corruption of the DSDT if the object type being stored was
6430 the same as the target object type and the length of the object
6431 being stored was equal to or smaller than the original (existing)
6432 target object. This was seen to cause corruption of battery _BIF
6433 buffers if the _BIF method modified the buffer on the fly.
6435 Fixed a problem where an internal error was generated if a control
6436 method invocation was used in an OperationRegion, Buffer, or
6437 Package declaration. This was caused by the deferred parsing of
6438 the control method and thus the deferred creation of the internal
6439 method object. The solution to this problem was to create the
6440 internal method object at the moment the method is encountered in
6441 the first pass - so that subsequent references to the method will
6442 able to obtain the required parameter count and thus properly
6443 parse the method invocation. This problem presented itself as an
6444 AE_AML_INTERNAL during the pass 1 parse phase during table load.
6446 Fixed a problem where the internal String object copy routine did
6447 not always allocate sufficient memory for the target String object
6448 and caused memory corruption. This problem was seen to cause
6449 "Allocation already present in list!" errors as memory allocation
6452 Implemented a new function for the evaluation of namespace objects
6453 that allows the specification of the allowable return object
6454 types. This simplifies a lot of code that checks for a return
6455 object of one or more specific objects returned from the
6456 evaluation (such as _STA, etc.) This may become and external
6457 function if it would be useful to ACPI-related drivers.
6459 Completed another round of prefixing #defines with "ACPI_" for
6462 Completed additional code restructuring to allow more modular
6463 linking for iASL compiler and AcpiExec. Several files were split
6464 creating new files. New files: nsparse.c dsinit.c evgpe.c
6466 Implemented an abort mechanism to terminate an executing control
6467 method via the AML debugger. This feature is useful for debugging
6468 control methods that depend (wait) for specific hardware
6471 Code and Data Size: Current core subsystem library sizes are shown
6472 below. These are the code and data sizes for the acpica.lib
6473 produced by the Microsoft Visual C++ 6.0 compiler, and these
6474 values do not include any ACPI driver or OSPM code. The debug
6475 version of the code includes the debug output trace mechanism and
6476 has a much larger code and data size. Note that these values will
6477 vary depending on the efficiency of the compiler and the compiler
6478 options used during generation.
6481 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6482 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6484 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6485 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6488 2) iASL Compiler/Disassembler
6490 Fixed a compiler code generation problem for "Interrupt" Resource
6491 Descriptors. If specified in the ASL, the optional "Resource
6492 Source Index" and "Resource Source" fields were not inserted into
6493 the correct location within the AML resource descriptor, creating
6494 an invalid descriptor.
6496 Fixed a disassembler problem for "Interrupt" resource descriptors.
6497 The optional "Resource Source Index" and "Resource Source" fields
6501 ----------------------------------------
6502 22 November 2002. Summary of changes for version 20021122.
6505 1) ACPI CA Core Subsystem:
6507 Fixed a reported problem where an object stored to a Method Local
6508 or Arg was not copied to a new object during the store - the
6509 object pointer was simply copied to the Local/Arg. This caused
6510 all subsequent operations on the Local/Arg to also affect the
6511 original source of the store operation.
6513 Fixed a problem where a store operation to a Method Local or Arg
6514 was not completed properly if the Local/Arg contained a reference
6515 (from RefOf) to a named field. The general-purpose store-to-
6516 namespace-node code is now used so that this case is handled
6519 Fixed a problem where the internal object copy routine would cause
6520 a protection fault if the object being copied was a Package and
6521 contained either 1) a NULL package element or 2) a nested sub-
6524 Fixed a problem with the GPE initialization that resulted from an
6525 ambiguity in the ACPI specification. One section of the
6526 specification states that both the address and length of the GPE
6527 block must be zero if the block is not supported. Another section
6528 implies that only the address need be zero if the block is not
6529 supported. The code has been changed so that both the address and
6530 the length must be non-zero to indicate a valid GPE block (i.e.,
6531 if either the address or the length is zero, the GPE block is
6534 Code and Data Size: Current core subsystem library sizes are shown
6535 below. These are the code and data sizes for the acpica.lib
6536 produced by the Microsoft Visual C++ 6.0 compiler, and these
6537 values do not include any ACPI driver or OSPM code. The debug
6538 version of the code includes the debug output trace mechanism and
6539 has a much larger code and data size. Note that these values will
6540 vary depending on the efficiency of the compiler and the compiler
6541 options used during generation.
6544 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6545 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6547 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6548 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6553 Cleaned up EC driver. Exported an external EC read/write
6554 interface. By going through this, other drivers (most notably
6555 sonypi) will be able to serialize access to the EC.
6558 3) iASL Compiler/Disassembler
6560 Implemented support to optionally generate include files for both
6561 ASM and C (the -i switch). This simplifies BIOS development by
6562 automatically creating include files that contain external
6563 declarations for the symbols that are created within the
6565 (optionally generated) ASM and C AML source files.
6568 ----------------------------------------
6569 15 November 2002. Summary of changes for version 20021115.
6571 1) ACPI CA Core Subsystem:
6573 Fixed a memory leak problem where an error during resolution of
6575 method arguments during a method invocation from another method
6576 failed to cleanup properly by deleting all successfully resolved
6579 Fixed a problem where the target of the Index() operator was not
6580 correctly constructed if the source object was a package. This
6581 problem has not been detected because the use of a target operand
6582 with Index() is very rare.
6584 Fixed a problem with the Index() operator where an attempt was
6585 made to delete the operand objects twice.
6587 Fixed a problem where an attempt was made to delete an operand
6588 twice during execution of the CondRefOf() operator if the target
6591 Implemented the first of perhaps several internal create object
6592 functions that create and initialize a specific object type. This
6593 consolidates duplicated code wherever the object is created, thus
6594 shrinking the size of the subsystem.
6596 Implemented improved debug/error messages for errors that occur
6597 during nested method invocations. All executing method pathnames
6598 are displayed (with the error) as the call stack is unwound - thus
6601 Fixed a problem introduced in the 10/02 release that caused
6602 premature deletion of a buffer object if a buffer was used as an
6603 ASL operand where an integer operand is required (Thus causing an
6604 implicit object conversion from Buffer to Integer.) The change in
6605 the 10/02 release was attempting to fix a memory leak (albeit
6608 Code and Data Size: Current core subsystem library sizes are shown
6609 below. These are the code and data sizes for the acpica.lib
6610 produced by the Microsoft Visual C++ 6.0 compiler, and these
6611 values do not include any ACPI driver or OSPM code. The debug
6612 version of the code includes the debug output trace mechanism and
6613 has a much larger code and data size. Note that these values will
6614 vary depending on the efficiency of the compiler and the compiler
6615 options used during generation.
6618 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6619 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6621 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6622 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6627 Changed the implementation of the ACPI semaphores to use down()
6628 instead of down_interruptable(). It is important that the
6629 execution of ACPI control methods not be interrupted by signals.
6630 Methods must run to completion, or the system may be left in an
6631 unknown/unstable state.
6633 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
6637 3) iASL Compiler/Disassembler
6640 Changed the default location of output files. All output files
6641 are now placed in the current directory by default instead of in
6642 the directory of the source file. This change may affect some
6643 existing makefiles, but it brings the behavior of the compiler in
6644 line with other similar tools. The location of the output files
6645 can be overridden with the -p command line switch.
6648 ----------------------------------------
6649 11 November 2002. Summary of changes for version 20021111.
6652 0) ACPI Specification 2.0B is released and is now available at:
6653 http://www.acpi.info/index.html
6656 1) ACPI CA Core Subsystem:
6658 Implemented support for the ACPI 2.0 SMBus Operation Regions.
6659 This includes the early detection and handoff of the request to
6660 the SMBus region handler (avoiding all of the complex field
6661 support code), and support for the bidirectional return packet
6662 from an SMBus write operation. This paves the way for the
6663 development of SMBus drivers in each host operating system.
6665 Fixed a problem where the semaphore WAIT_FOREVER constant was
6666 defined as 32 bits, but must be 16 bits according to the ACPI
6667 specification. This had the side effect of causing ASL
6668 Mutex/Event timeouts even though the ASL code requested a wait
6669 forever. Changed all internal references to the ACPI timeout
6670 parameter to 16 bits to prevent future problems. Changed the name
6671 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
6673 Code and Data Size: Current core subsystem library sizes are shown
6674 below. These are the code and data sizes for the acpica.lib
6675 produced by the Microsoft Visual C++ 6.0 compiler, and these
6676 values do not include any ACPI driver or OSPM code. The debug
6677 version of the code includes the debug output trace mechanism and
6678 has a much larger code and data size. Note that these values will
6679 vary depending on the efficiency of the compiler and the compiler
6680 options used during generation.
6683 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6684 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6686 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6687 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6692 Module loading/unloading fixes (John Cagle)
6695 3) iASL Compiler/Disassembler
6697 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
6699 Implemented support for the disassembly of all SMBus protocol
6700 keywords (SMBQuick, SMBWord, etc.)
6702 ----------------------------------------
6703 01 November 2002. Summary of changes for version 20021101.
6706 1) ACPI CA Core Subsystem:
6708 Fixed a problem where platforms that have a GPE1 block but no GPE0
6709 block were not handled correctly. This resulted in a "GPE
6710 overlap" error message. GPE0 is no longer required.
6712 Removed code added in the previous release that inserted nodes
6713 into the namespace in alphabetical order. This caused some side-
6714 effects on various machines. The root cause of the problem is
6715 still under investigation since in theory, the internal ordering
6716 of the namespace nodes should not matter.
6719 Enhanced error reporting for the case where a named object is not
6720 found during control method execution. The full ACPI namepath
6721 (name reference) of the object that was not found is displayed in
6724 Note: as a result of the overhaul of the namespace object types in
6725 the previous release, the namespace nodes for the predefined
6726 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
6727 instead of ACPI_TYPE_ANY. This simplifies the namespace
6728 management code but may affect code that walks the namespace tree
6729 looking for specific object types.
6731 Code and Data Size: Current core subsystem library sizes are shown
6732 below. These are the code and data sizes for the acpica.lib
6733 produced by the Microsoft Visual C++ 6.0 compiler, and these
6734 values do not include any ACPI driver or OSPM code. The debug
6735 version of the code includes the debug output trace mechanism and
6736 has a much larger code and data size. Note that these values will
6737 vary depending on the efficiency of the compiler and the compiler
6738 options used during generation.
6741 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6742 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6744 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6745 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6750 Fixed a problem introduced in the previous release where the
6751 Processor and Thermal objects were not recognized and installed in
6752 /proc. This was related to the scope type change described above.
6755 3) iASL Compiler/Disassembler
6757 Implemented the -g option to get all of the required ACPI tables
6758 from the registry and save them to files (Windows version of the
6759 compiler only.) The required tables are the FADT, FACS, and DSDT.
6761 Added ACPI table checksum validation during table disassembly in
6762 order to catch corrupted tables.
6765 ----------------------------------------
6766 22 October 2002. Summary of changes for version 20021022.
6768 1) ACPI CA Core Subsystem:
6770 Implemented a restriction on the Scope operator that the target
6771 must already exist in the namespace at the time the operator is
6772 encountered (during table load or method execution). In other
6773 words, forward references are not allowed and Scope() cannot
6774 create a new object. This changes the previous behavior where the
6775 interpreter would create the name if not found. This new behavior
6776 correctly enables the search-to-root algorithm during namespace
6777 lookup of the target name. Because of this upsearch, this fixes
6778 the known Compaq _SB_.OKEC problem and makes both the AML
6779 interpreter and iASL compiler compatible with other ACPI
6782 Completed a major overhaul of the internal ACPI object types for
6783 the ACPI Namespace and the associated operand objects. Many of
6784 these types had become obsolete with the introduction of the two-
6785 pass namespace load. This cleanup simplifies the code and makes
6786 the entire namespace load mechanism much clearer and easier to
6789 Improved debug output for tracking scope opening/closing to help
6790 diagnose scoping issues. The old scope name as well as the new
6791 scope name are displayed. Also improved error messages for
6792 problems with ASL Mutex objects and error messages for GPE
6795 Cleaned up the namespace dump code, removed obsolete code.
6797 All string output (for all namespace/object dumps) now uses the
6798 common ACPI string output procedure which handles escapes properly
6799 and does not emit non-printable characters.
6801 Fixed some issues with constants in the 64-bit version of the
6802 local C library (utclib.c)
6807 EC Driver: No longer attempts to acquire the Global Lock at
6811 3) iASL Compiler/Disassembler
6813 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
6814 2 opcodes outside of a control method. This means that the
6815 "executable" operators (versus the "namespace" operators) cannot
6816 be used at the table level; they can only be used within a control
6819 Implemented the restriction on the Scope() operator where the
6820 target must already exist in the namespace at the time the
6821 operator is encountered (during ASL compilation). In other words,
6822 forward references are not allowed and Scope() cannot create a new
6823 object. This makes the iASL compiler compatible with other ACPI
6824 implementations and makes the Scope() implementation adhere to the
6827 Fixed a problem where namepath optimization for the Alias operator
6828 was optimizing the wrong path (of the two namepaths.) This caused
6829 a "Missing alias link" error message.
6831 Fixed a problem where an "unknown reserved name" warning could be
6832 incorrectly generated for names like "_SB" when the trailing
6833 underscore is not used in the original ASL.
6835 Fixed a problem where the reserved name check did not handle
6836 NamePaths with multiple NameSegs correctly. The first nameseg of
6837 the NamePath was examined instead of the last NameSeg.
6840 ----------------------------------------
6842 02 October 2002. Summary of changes for this release.
6845 1) ACPI CA Core Subsystem version 20021002:
6847 Fixed a problem where a store/copy of a string to an existing
6848 string did not always set the string length properly in the String
6851 Fixed a reported problem with the ToString operator where the
6852 behavior was identical to the ToHexString operator instead of just
6853 simply converting a raw buffer to a string data type.
6855 Fixed a problem where CopyObject and the other "explicit"
6856 conversion operators were not updating the internal namespace node
6857 type as part of the store operation.
6859 Fixed a memory leak during implicit source operand conversion
6860 where the original object was not deleted if it was converted to a
6861 new object of a different type.
6863 Enhanced error messages for all problems associated with namespace
6864 lookups. Common procedure generates and prints the lookup name as
6865 well as the formatted status.
6867 Completed implementation of a new design for the Alias support
6868 within the namespace. The existing design did not handle the case
6869 where a new object was assigned to one of the two names due to the
6870 use of an explicit conversion operator, resulting in the two names
6871 pointing to two different objects. The new design simply points
6872 the Alias name to the original name node - not to the object.
6873 This results in a level of indirection that must be handled in the
6874 name resolution mechanism.
6876 Code and Data Size: Current core subsystem library sizes are shown
6877 below. These are the code and data sizes for the acpica.lib
6878 produced by the Microsoft Visual C++ 6.0 compiler, and these
6879 values do not include any ACPI driver or OSPM code. The debug
6880 version of the code includes the debug output trace mechanism and
6881 has a larger code and data size. Note that these values will vary
6882 depending on the efficiency of the compiler and the compiler
6883 options used during generation.
6886 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6887 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6889 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6890 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6895 Initialize thermal driver's timer before it is used. (Knut
6898 Allow handling negative celsius values. (Kochi Takayoshi)
6900 Fix thermal management and make trip points. R/W (Pavel Machek)
6902 Fix /proc/acpi/sleep. (P. Christeas)
6904 IA64 fixes. (David Mosberger)
6906 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
6908 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
6912 3) iASL Compiler/Disassembler
6914 Clarified some warning/error messages.
6917 ----------------------------------------
6918 18 September 2002. Summary of changes for this release.
6921 1) ACPI CA Core Subsystem version 20020918:
6923 Fixed a reported problem with reference chaining (via the Index()
6924 and RefOf() operators) in the ObjectType() and SizeOf() operators.
6925 The definition of these operators includes the dereferencing of
6926 all chained references to return information on the base object.
6928 Fixed a problem with stores to indexed package elements - the
6929 existing code would not complete the store if an "implicit
6930 conversion" was not performed. In other words, if the existing
6931 object (package element) was to be replaced completely, the code
6932 didn't handle this case.
6934 Relaxed typechecking on the ASL "Scope" operator to allow the
6935 target name to refer to an object of type Integer, String, or
6936 Buffer, in addition to the scoping object types (Device,
6937 predefined Scopes, Processor, PowerResource, and ThermalZone.)
6938 This allows existing AML code that has workarounds for a bug in
6939 Windows to function properly. A warning is issued, however. This
6940 affects both the AML interpreter and the iASL compiler. Below is
6941 an example of this type of ASL code:
6947 Fixed some reported problems with 64-bit integer support in the
6948 local implementation of C library functions (clib.c)
6953 Use ACPI fix map region instead of IOAPIC region, since it is
6954 undefined in non-SMP.
6956 Ensure that the SCI has the proper polarity and trigger, even on
6957 systems that do not have an interrupt override entry in the MADT.
6959 2.5 big driver reorganization (Pat Mochel)
6961 Use early table mapping code from acpitable.c (Andi Kleen)
6963 New blacklist entries (Andi Kleen)
6965 Blacklist improvements. Split blacklist code out into a separate
6966 file. Move checking the blacklist to very early. Previously, we
6967 would use ACPI tables, and then halfway through init, check the
6968 blacklist -- too late. Now, it's early enough to completely fall-
6972 3) iASL Compiler/Disassembler version 20020918:
6974 Fixed a problem where the typechecking code didn't know that an
6975 alias could point to a method. In other words, aliases were not
6976 being dereferenced during typechecking.
6979 ----------------------------------------
6980 29 August 2002. Summary of changes for this release.
6982 1) ACPI CA Core Subsystem Version 20020829:
6984 If the target of a Scope() operator already exists, it must be an
6985 object type that actually opens a scope -- such as a Device,
6986 Method, Scope, etc. This is a fatal runtime error. Similar error
6987 check has been added to the iASL compiler also.
6989 Tightened up the namespace load to disallow multiple names in the
6990 same scope. This previously was allowed if both objects were of
6991 the same type. (i.e., a lookup was the same as entering a new
6997 Ensure that the ACPI interrupt has the proper trigger and
7000 local_irq_disable is extraneous. (Matthew Wilcox)
7002 Make "acpi=off" actually do what it says, and not use the ACPI
7003 interpreter *or* the tables.
7005 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
7009 3) iASL Compiler/Disassembler Version 20020829:
7011 Implemented namepath optimization for name declarations. For
7012 example, a declaration like "Method (\_SB_.ABCD)" would get
7013 optimized to "Method (ABCD)" if the declaration is within the
7014 \_SB_ scope. This optimization is in addition to the named
7015 reference path optimization first released in the previous
7016 version. This would seem to complete all possible optimizations
7017 for namepaths within the ASL/AML.
7019 If the target of a Scope() operator already exists, it must be an
7020 object type that actually opens a scope -- such as a Device,
7023 Implemented a check and warning for unreachable code in the same
7024 block below a Return() statement.
7026 Fixed a problem where the listing file was not generated if the
7027 compiler aborted if the maximum error count was exceeded (200).
7029 Fixed a problem where the typechecking of method return values was
7030 broken. This includes the check for a return value when the
7031 method is invoked as a TermArg (a return value is expected.)
7033 Fixed a reported problem where EOF conditions during a quoted
7034 string or comment caused a fault.
7037 ----------------------------------------
7038 15 August 2002. Summary of changes for this release.
7040 1) ACPI CA Core Subsystem Version 20020815:
7042 Fixed a reported problem where a Store to a method argument that
7043 contains a reference did not perform the indirect store correctly.
7044 This problem was created during the conversion to the new
7045 reference object model - the indirect store to a method argument
7046 code was not updated to reflect the new model.
7048 Reworked the ACPI mode change code to better conform to ACPI 2.0,
7049 handle corner cases, and improve code legibility (Kochi Takayoshi)
7051 Fixed a problem with the pathname parsing for the carat (^)
7052 prefix. The heavy use of the carat operator by the new namepath
7053 optimization in the iASL compiler uncovered a problem with the AML
7054 interpreter handling of this prefix. In the case where one or
7055 more carats precede a single nameseg, the nameseg was treated as
7056 standalone and the search rule (to root) was inadvertently
7057 applied. This could cause both the iASL compiler and the
7058 interpreter to find the wrong object or to miss the error that
7059 should occur if the object does not exist at that exact pathname.
7061 Found and fixed the problem where the HP Pavilion DSDT would not
7062 load. This was a relatively minor tweak to the table loading code
7063 (a problem caused by the unexpected encounter with a method
7064 invocation not within a control method), but it does not solve the
7065 overall issue of the execution of AML code at the table level.
7066 This investigation is still ongoing.
7068 Code and Data Size: Current core subsystem library sizes are shown
7069 below. These are the code and data sizes for the acpica.lib
7070 produced by the Microsoft Visual C++ 6.0 compiler, and these
7071 values do not include any ACPI driver or OSPM code. The debug
7072 version of the code includes the debug output trace mechanism and
7073 has a larger code and data size. Note that these values will vary
7074 depending on the efficiency of the compiler and the compiler
7075 options used during generation.
7078 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7079 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7081 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7082 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7087 Remove redundant slab.h include (Brad Hards)
7089 Fix several bugs in thermal.c (Herbert Nachtnebel)
7091 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
7093 Change acpi_system_suspend to use updated irq functions (Pavel
7096 Export acpi_get_firmware_table (Matthew Wilcox)
7098 Use proper root proc entry for ACPI (Kochi Takayoshi)
7100 Fix early-boot table parsing (Bjorn Helgaas)
7103 3) iASL Compiler/Disassembler
7105 Reworked the compiler options to make them more consistent and to
7106 use two-letter options where appropriate. We were running out of
7107 sensible letters. This may break some makefiles, so check the
7108 current options list by invoking the compiler with no parameters.
7110 Completed the design and implementation of the ASL namepath
7111 optimization option for the compiler. This option optimizes all
7112 references to named objects to the shortest possible path. The
7113 first attempt tries to utilize a single nameseg (4 characters) and
7114 the "search-to-root" algorithm used by the interpreter. If that
7115 cannot be used (because either the name is not in the search path
7116 or there is a conflict with another object with the same name),
7117 the pathname is optimized using the carat prefix (usually a
7118 shorter string than specifying the entire path from the root.)
7120 Implemented support to obtain the DSDT from the Windows registry
7121 (when the disassembly option is specified with no input file).
7122 Added this code as the implementation for AcpiOsTableOverride in
7123 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
7124 utility) to scan memory for the DSDT to the AcpiOsTableOverride
7125 function in the DOS OSL to make the disassembler truly OS
7128 Implemented a new option to disassemble and compile in one step.
7129 When used without an input filename, this option will grab the
7130 DSDT from the local machine, disassemble it, and compile it in one
7133 Added a warning message for invalid escapes (a backslash followed
7134 by any character other than the allowable escapes). This catches
7135 the quoted string error "\_SB_" (which should be "\\_SB_" ).
7137 Also, there are numerous instances in the ACPI specification where
7140 Added a compiler option to disable all optimizations. This is
7141 basically the "compatibility mode" because by using this option,
7142 the AML code will come out exactly the same as other ASL
7145 Added error messages for incorrectly ordered dependent resource
7146 functions. This includes: missing EndDependentFn macro at end of
7147 dependent resource list, nested dependent function macros (both
7148 start and end), and missing StartDependentFn macro. These are
7149 common errors that should be caught at compile time.
7151 Implemented _OSI support for the disassembler and compiler. _OSI
7152 must be included in the namespace for proper disassembly (because
7153 the disassembler must know the number of arguments.)
7155 Added an "optimization" message type that is optional (off by
7156 default). This message is used for all optimizations - including
7157 constant folding, integer optimization, and namepath optimization.
7159 ----------------------------------------
7160 25 July 2002. Summary of changes for this release.
7163 1) ACPI CA Core Subsystem Version 20020725:
7165 The AML Disassembler has been enhanced to produce compilable ASL
7166 code and has been integrated into the iASL compiler (see below) as
7167 well as the single-step disassembly for the AML debugger and the
7168 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
7169 resource templates and macros are fully supported. The
7170 disassembler has been tested on over 30 different AML files,
7171 producing identical AML when the resulting disassembled ASL file
7172 is recompiled with the same ASL compiler.
7174 Modified the Resource Manager to allow zero interrupts and zero
7175 dma channels during the GetCurrentResources call. This was
7176 causing problems on some platforms.
7178 Added the AcpiOsRedirectOutput interface to the OSL to simplify
7179 output redirection for the AcpiOsPrintf and AcpiOsVprintf
7182 Code and Data Size: Current core subsystem library sizes are shown
7183 below. These are the code and data sizes for the acpica.lib
7184 produced by the Microsoft Visual C++ 6.0 compiler, and these
7185 values do not include any ACPI driver or OSPM code. The debug
7186 version of the code includes the debug output trace mechanism and
7187 has a larger code and data size. Note that these values will vary
7188 depending on the efficiency of the compiler and the compiler
7189 options used during generation.
7192 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7193 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7195 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7196 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7201 Fixed a panic in the EC driver (Dominik Brodowski)
7203 Implemented checksum of the R/XSDT itself during Linux table scan
7209 The AML disassembler is integrated into the compiler. The "-d"
7210 option invokes the disassembler to completely disassemble an
7211 input AML file, producing as output a text ASL file with the
7212 extension ".dsl" (to avoid name collisions with existing .asl
7213 source files.) A future enhancement will allow the disassembler
7214 to obtain the BIOS DSDT from the registry under Windows.
7216 Fixed a problem with the VendorShort and VendorLong resource
7217 descriptors where an invalid AML sequence was created.
7219 Implemented a fix for BufferData term in the ASL parser. It was
7220 inadvertently defined twice, allowing invalid syntax to pass and
7221 causing reduction conflicts.
7223 Fixed a problem where the Ones opcode could get converted to a
7224 value of zero if "Ones" was used where a byte, word or dword value
7225 was expected. The 64-bit value is now truncated to the correct
7226 size with the correct value.
7230 ----------------------------------------
7231 02 July 2002. Summary of changes for this release.
7234 1) ACPI CA Core Subsystem Version 20020702:
7236 The Table Manager code has been restructured to add several new
7237 features. Tables that are not required by the core subsystem
7238 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
7239 validated in any way and are returned from AcpiGetFirmwareTable if
7240 requested. The AcpiOsTableOverride interface is now called for
7241 each table that is loaded by the subsystem in order to allow the
7242 host to override any table it chooses. Previously, only the DSDT
7243 could be overridden. Added one new files, tbrsdt.c and
7246 Fixed a problem with the conversion of internal package objects to
7247 external objects (when a package is returned from a control
7248 method.) The return buffer length was set to zero instead of the
7249 proper length of the package object.
7251 Fixed a reported problem with the use of the RefOf and DeRefOf
7252 operators when passing reference arguments to control methods. A
7253 new type of Reference object is used internally for references
7254 produced by the RefOf operator.
7256 Added additional error messages in the Resource Manager to explain
7257 AE_BAD_DATA errors when they occur during resource parsing.
7259 Split the AcpiEnableSubsystem into two primitives to enable a
7260 finer granularity initialization sequence. These two calls should
7261 be called in this order: AcpiEnableSubsystem (flags),
7262 AcpiInitializeObjects (flags). The flags parameter remains the
7268 Updated the ACPI utilities module to understand the new style of
7269 fully resolved package objects that are now returned from the core
7270 subsystem. This eliminates errors of the form:
7272 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
7273 acpi_utils-0430 [145] acpi_evaluate_reference:
7274 Invalid element in package (not a device reference)
7276 The method evaluation utility uses the new buffer allocation
7277 scheme instead of calling AcpiEvaluate Object twice.
7279 Added support for ECDT. This allows the use of the Embedded
7281 Controller before the namespace has been fully initialized, which
7282 is necessary for ACPI 2.0 support, and for some laptops to
7283 initialize properly. (Laptops using ECDT are still rare, so only
7284 limited testing was performed of the added functionality.)
7286 Fixed memory leaks in the EC driver.
7288 Eliminated a brittle code structure in acpi_bus_init().
7290 Eliminated the acpi_evaluate() helper function in utils.c. It is
7291 no longer needed since acpi_evaluate_object can optionally
7292 allocate memory for the return object.
7294 Implemented fix for keyboard hang when getting battery readings on
7295 some systems (Stephen White)
7297 PCI IRQ routing update (Dominik Brodowski)
7299 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
7302 ----------------------------------------
7303 11 June 2002. Summary of changes for this release.
7306 1) ACPI CA Core Subsystem Version 20020611:
7308 Fixed a reported problem where constants such as Zero and One
7309 appearing within _PRT packages were not handled correctly within
7310 the resource manager code. Originally reported against the ASL
7311 compiler because the code generator now optimizes integers to
7312 their minimal AML representation (i.e. AML constants if possible.)
7313 The _PRT code now handles all AML constant opcodes correctly
7314 (Zero, One, Ones, Revision).
7316 Fixed a problem with the Concatenate operator in the AML
7317 interpreter where a buffer result object was incorrectly marked as
7318 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
7320 All package sub-objects are now fully resolved before they are
7321 returned from the external ACPI interfaces. This means that name
7322 strings are resolved to object handles, and constant operators
7323 (Zero, One, Ones, Revision) are resolved to Integers.
7325 Implemented immediate resolution of the AML Constant opcodes
7326 (Zero, One, Ones, Revision) to Integer objects upon detection
7327 within the AML stream. This has simplified and reduced the
7328 generated code size of the subsystem by eliminating about 10
7329 switch statements for these constants (which previously were
7330 contained in Reference objects.) The complicating issues are that
7331 the Zero opcode is used as a "placeholder" for unspecified
7332 optional target operands and stores to constants are defined to be
7335 Code and Data Size: Current core subsystem library sizes are shown
7336 below. These are the code and data sizes for the acpica.lib
7337 produced by the Microsoft Visual C++ 6.0 compiler, and these
7338 values do not include any ACPI driver or OSPM code. The debug
7339 version of the code includes the debug output trace mechanism and
7340 has a larger code and data size. Note that these values will vary
7341 depending on the efficiency of the compiler and the compiler
7342 options used during generation.
7345 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7346 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7348 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7349 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7355 Added preliminary support for obtaining _TRA data for PCI root
7356 bridges (Bjorn Helgaas).
7359 3) iASL Compiler Version X2046:
7361 Fixed a problem where the "_DDN" reserved name was defined to be a
7362 control method with one argument. There are no arguments, and
7363 _DDN does not have to be a control method.
7365 Fixed a problem with the Linux version of the compiler where the
7366 source lines printed with error messages were the wrong lines.
7367 This turned out to be the "LF versus CR/LF" difference between
7368 Windows and Unix. This appears to be the longstanding issue
7369 concerning listing output and error messages.
7371 Fixed a problem with the Linux version of compiler where opcode
7372 names within error messages were wrong. This was caused by a
7373 slight difference in the output of the Flex tool on Linux versus
7376 Fixed a problem with the Linux compiler where the hex output files
7377 contained some garbage data caused by an internal buffer overrun.
7380 ----------------------------------------
7381 17 May 2002. Summary of changes for this release.
7384 1) ACPI CA Core Subsystem Version 20020517:
7386 Implemented a workaround to an BIOS bug discovered on the HP
7387 OmniBook where the FADT revision number and the table size are
7388 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
7389 behavior is to fallback to using only the ACPI 1.0 fields of the
7390 FADT if the table is too small to be a ACPI 2.0 table as claimed
7391 by the revision number. Although this is a BIOS bug, this is a
7392 case where the workaround is simple enough and with no side
7393 effects, so it seemed prudent to add it. A warning message is
7396 Implemented minimum size checks for the fixed-length ACPI tables -
7397 - the FADT and FACS, as well as consistency checks between the
7398 revision number and the table size.
7400 Fixed a reported problem in the table override support where the
7401 new table pointer was incorrectly treated as a physical address
7402 instead of a logical address.
7404 Eliminated the use of the AE_AML_ERROR exception and replaced it
7405 with more descriptive codes.
7407 Fixed a problem where an exception would occur if an ASL Field was
7408 defined with no named Field Units underneath it (used by some
7411 Code and Data Size: Current core subsystem library sizes are shown
7412 below. These are the code and data sizes for the acpica.lib
7413 produced by the Microsoft Visual C++ 6.0 compiler, and these
7414 values do not include any ACPI driver or OSPM code. The debug
7415 version of the code includes the debug output trace mechanism and
7416 has a larger code and data size. Note that these values will vary
7417 depending on the efficiency of the compiler and the compiler
7418 options used during generation.
7421 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7422 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7424 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7425 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7431 Much work done on ACPI init (MADT and PCI IRQ routing support).
7432 (Paul D. and Dominik Brodowski)
7434 Fix PCI IRQ-related panic on boot (Sam Revitch)
7436 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
7438 Fix "MHz" typo (Dominik Brodowski)
7440 Fix RTC year 2000 issue (Dominik Brodowski)
7442 Preclude multiple button proc entries (Eric Brunet)
7444 Moved arch-specific code out of include/platform/aclinux.h
7446 3) iASL Compiler Version X2044:
7448 Implemented error checking for the string used in the EISAID macro
7449 (Usually used in the definition of the _HID object.) The code now
7450 strictly enforces the PnP format - exactly 7 characters, 3
7451 uppercase letters and 4 hex digits.
7453 If a raw string is used in the definition of the _HID object
7454 (instead of the EISAID macro), the string must contain all
7455 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7458 Implemented checking for invalid use of ACPI reserved names for
7459 most of the name creation operators (Name, Device, Event, Mutex,
7460 OperationRegion, PowerResource, Processor, and ThermalZone.)
7461 Previously, this check was only performed for control methods.
7463 Implemented an additional check on the Name operator to emit an
7464 error if a reserved name that must be implemented in ASL as a
7465 control method is used. We know that a reserved name must be a
7466 method if it is defined with input arguments.
7468 The warning emitted when a namespace object reference is not found
7469 during the cross reference phase has been changed into an error.
7470 The "External" directive should be used for names defined in other
7474 4) Tools and Utilities
7476 The 16-bit tools (adump16 and aexec16) have been regenerated and
7479 Fixed a problem with the output of both acpidump and adump16 where
7480 the indentation of closing parentheses and brackets was not
7482 aligned properly with the parent block.
7485 ----------------------------------------
7486 03 May 2002. Summary of changes for this release.
7489 1) ACPI CA Core Subsystem Version 20020503:
7491 Added support a new OSL interface that allows the host operating
7493 system software to override the DSDT found in the firmware -
7494 AcpiOsTableOverride. With this interface, the OSL can examine the
7495 version of the firmware DSDT and replace it with a different one
7498 Added new external interfaces for accessing ACPI registers from
7499 device drivers and other system software - AcpiGetRegister and
7500 AcpiSetRegister. This was simply an externalization of the
7501 existing AcpiHwBitRegister interfaces.
7503 Fixed a regression introduced in the previous build where the
7504 ASL/AML CreateField operator always returned an error,
7505 "destination must be a NS Node".
7507 Extended the maximum time (before failure) to successfully enable
7508 ACPI mode to 3 seconds.
7510 Code and Data Size: Current core subsystem library sizes are shown
7511 below. These are the code and data sizes for the acpica.lib
7512 produced by the Microsoft Visual C++ 6.0 compiler, and these
7513 values do not include any ACPI driver or OSPM code. The debug
7514 version of the code includes the debug output trace mechanism and
7515 has a larger code and data size. Note that these values will vary
7516 depending on the efficiency of the compiler and the compiler
7517 options used during generation.
7520 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7521 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7523 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7524 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7529 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
7530 free. While 3 out of 4 of our in-house systems work fine, the last
7531 one still hangs when testing the LAPIC timer.
7533 Renamed many files in 2.5 kernel release to omit "acpi_" from the
7536 Added warning on boot for Presario 711FR.
7538 Sleep improvements (Pavel Machek)
7540 ACPI can now be built without CONFIG_PCI enabled.
7542 IA64: Fixed memory map functions (JI Lee)
7545 3) iASL Compiler Version X2043:
7547 Added support to allow the compiler to be integrated into the MS
7548 VC++ development environment for one-button compilation of single
7549 files or entire projects -- with error-to-source-line mapping.
7551 Implemented support for compile-time constant folding for the
7552 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
7553 specification. This allows the ASL writer to use expressions
7554 instead of Integer/Buffer/String constants in terms that must
7555 evaluate to constants at compile time and will also simplify the
7556 emitted AML in any such sub-expressions that can be folded
7557 (evaluated at compile-time.) This increases the size of the
7558 compiler significantly because a portion of the ACPI CA AML
7559 interpreter is included within the compiler in order to pre-
7560 evaluate constant expressions.
7563 Fixed a problem with the "Unicode" ASL macro that caused the
7564 compiler to fault. (This macro is used in conjunction with the
7565 _STR reserved name.)
7567 Implemented an AML opcode optimization to use the Zero, One, and
7568 Ones opcodes where possible to further reduce the size of integer
7569 constants and thus reduce the overall size of the generated AML
7572 Implemented error checking for new reserved terms for ACPI version
7575 Implemented the -qr option to display the current list of ACPI
7576 reserved names known to the compiler.
7578 Implemented the -qc option to display the current list of ASL
7579 operators that are allowed within constant expressions and can
7580 therefore be folded at compile time if the operands are constants.
7585 Updated the Programmer's Reference for new interfaces, data types,
7586 and memory allocation model options.
7588 Updated the iASL Compiler User Reference to apply new format and
7589 add information about new features and options.
7591 ----------------------------------------
7592 19 April 2002. Summary of changes for this release.
7594 1) ACPI CA Core Subsystem Version 20020419:
7596 The source code base for the Core Subsystem has been completely
7597 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
7598 versions. The Lint option files used are included in the
7599 /acpi/generate/lint directory.
7601 Implemented enhanced status/error checking across the entire
7602 Hardware manager subsystem. Any hardware errors (reported from
7603 the OSL) are now bubbled up and will abort a running control
7607 Fixed a problem where the per-ACPI-table integer width (32 or 64)
7608 was stored only with control method nodes, causing a fault when
7609 non-control method code was executed during table loading. The
7610 solution implemented uses a global variable to indicate table
7611 width across the entire ACPI subsystem. Therefore, ACPI CA does
7612 not support mixed integer widths across different ACPI tables
7615 Fixed a problem where NULL extended fields (X fields) in an ACPI
7616 2.0 ACPI FADT caused the table load to fail. Although the
7617 existing ACPI specification is a bit fuzzy on this topic, the new
7618 behavior is to fall back on a ACPI 1.0 field if the corresponding
7619 ACPI 2.0 X field is zero (even though the table revision indicates
7620 a full ACPI 2.0 table.) The ACPI specification will be updated to
7623 Fixed a problem with the SystemMemory operation region handler
7624 where memory was always accessed byte-wise even if the AML-
7625 specified access width was larger than a byte. This caused
7626 problems on systems with memory-mapped I/O. Memory is now
7627 accessed with the width specified. On systems that do not support
7628 non-aligned transfers, a check is made to guarantee proper address
7629 alignment before proceeding in order to avoid an AML-caused
7630 alignment fault within the kernel.
7633 Fixed a problem with the ExtendedIrq resource where only one byte
7634 of the 4-byte Irq field was extracted.
7636 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
7637 function was out of date and required a rewrite.
7639 Code and Data Size: Current core subsystem library sizes are shown
7640 below. These are the code and data sizes for the acpica.lib
7641 produced by the Microsoft Visual C++ 6.0 compiler, and these
7642 values do not include any ACPI driver or OSPM code. The debug
7643 version of the code includes the debug output trace mechanism and
7644 has a larger code and data size. Note that these values will vary
7645 depending on the efficiency of the compiler and the compiler
7646 options used during generation.
7649 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7650 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7652 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7653 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7658 PCI IRQ routing fixes (Dominik Brodowski)
7661 3) iASL Compiler Version X2042:
7663 Implemented an additional compile-time error check for a field
7664 unit whose size + minimum access width would cause a run-time
7665 access beyond the end-of-region. Previously, only the field size
7668 The Core subsystem and iASL compiler now share a common parse
7669 object in preparation for compile-time evaluation of the type
7670 3/4/5 ASL operators.
7673 ----------------------------------------
7674 Summary of changes for this release: 03_29_02
7676 1) ACPI CA Core Subsystem Version 20020329:
7678 Implemented support for late evaluation of TermArg operands to
7679 Buffer and Package objects. This allows complex expressions to be
7680 used in the declarations of these object types.
7682 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
7683 1.0, if the field was larger than 32 bits, it was returned as a
7684 buffer - otherwise it was returned as an integer. In ACPI 2.0,
7685 the field is returned as a buffer only if the field is larger than
7686 64 bits. The TableRevision is now considered when making this
7687 conversion to avoid incompatibility with existing ASL code.
7689 Implemented logical addressing for AcpiOsGetRootPointer. This
7690 allows an RSDP with either a logical or physical address. With
7691 this support, the host OS can now override all ACPI tables with
7692 one logical RSDP. Includes implementation of "typed" pointer
7693 support to allow a common data type for both physical and logical
7694 pointers internally. This required a change to the
7695 AcpiOsGetRootPointer interface.
7697 Implemented the use of ACPI 2.0 Generic Address Structures for all
7698 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
7699 mapped I/O for these ACPI features.
7701 Initialization now ignores not only non-required tables (All
7702 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
7703 not validate the table headers of unrecognized tables.
7705 Fixed a problem where a notify handler could only be
7706 installed/removed on an object of type Device. All "notify"
7708 objects are now supported -- Devices, Processor, Power, and
7711 Removed most verbosity from the ACPI_DB_INFO debug level. Only
7712 critical information is returned when this debug level is enabled.
7714 Code and Data Size: Current core subsystem library sizes are shown
7715 below. These are the code and data sizes for the acpica.lib
7716 produced by the Microsoft Visual C++ 6.0 compiler, and these
7717 values do not include any ACPI driver or OSPM code. The debug
7718 version of the code includes the debug output trace mechanism and
7719 has a larger code and data size. Note that these values will vary
7720 depending on the efficiency of the compiler and the compiler
7721 options used during generation.
7724 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7725 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7727 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7728 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7733 The processor driver (acpi_processor.c) now fully supports ACPI
7734 2.0-based processor performance control (e.g. Intel(R)
7735 SpeedStep(TM) technology) Note that older laptops that only have
7736 the Intel "applet" interface are not supported through this. The
7737 'limit' and 'performance' interface (/proc) are fully functional.
7738 [Note that basic policy for controlling performance state
7739 transitions will be included in the next version of ospmd.] The
7740 idle handler was modified to more aggressively use C2, and PIIX4
7741 errata handling underwent a complete overhaul (big thanks to
7744 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
7745 based devices in the ACPI namespace are now dynamically bound
7746 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
7747 This allows, among other things, ACPI to resolve bus numbers for
7748 subordinate PCI bridges.
7750 Enhanced PCI IRQ routing to get the proper bus number for _PRT
7751 entries defined underneath PCI bridges.
7753 Added IBM 600E to bad bios list due to invalid _ADR value for
7754 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
7756 In the process of adding full MADT support (e.g. IOAPIC) for IA32
7757 (acpi.c, mpparse.c) -- stay tuned.
7759 Added back visual differentiation between fixed-feature and
7760 control-method buttons in dmesg. Buttons are also subtyped (e.g.
7761 button/power/PWRF) to simplify button identification.
7763 We no longer use -Wno-unused when compiling debug. Please ignore
7764 any "_THIS_MODULE defined but not used" messages.
7766 Can now shut down the system using "magic sysrq" key.
7769 3) iASL Compiler version 2041:
7771 Fixed a problem where conversion errors for hex/octal/decimal
7772 constants were not reported.
7774 Implemented a fix for the General Register template Address field.
7775 This field was 8 bits when it should be 64.
7777 Fixed a problem where errors/warnings were no longer being emitted
7778 within the listing output file.
7780 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
7781 exactly 4 characters, alphanumeric only.
7786 ----------------------------------------
7787 Summary of changes for this release: 03_08_02
7790 1) ACPI CA Core Subsystem Version 20020308:
7792 Fixed a problem with AML Fields where the use of the "AccessAny"
7793 keyword could cause an interpreter error due to attempting to read
7794 or write beyond the end of the parent Operation Region.
7796 Fixed a problem in the SystemMemory Operation Region handler where
7797 an attempt was made to map memory beyond the end of the region.
7798 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
7799 errors on some Linux systems.
7801 Fixed a problem where the interpreter/namespace "search to root"
7802 algorithm was not functioning for some object types. Relaxed the
7803 internal restriction on the search to allow upsearches for all
7804 external object types as well as most internal types.
7809 We now use safe_halt() macro versus individual calls to sti | hlt.
7811 Writing to the processor limit interface should now work. "echo 1"
7812 will increase the limit, 2 will decrease, and 0 will reset to the
7819 Fixed segfault on Linux version.
7822 ----------------------------------------
7823 Summary of changes for this release: 02_25_02
7825 1) ACPI CA Core Subsystem:
7828 Fixed a problem where the GPE bit masks were not initialized
7829 properly, causing erratic GPE behavior.
7831 Implemented limited support for multiple calling conventions. The
7832 code can be generated with either the VPL (variable parameter
7833 list, or "C") convention, or the FPL (fixed parameter list, or
7834 "Pascal") convention. The core subsystem is about 3.4% smaller
7835 when generated with FPL.
7840 Re-add some /proc/acpi/event functionality that was lost during
7843 Resolved issue with /proc events for fixed-feature buttons showing
7844 up as the system device.
7846 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
7848 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
7850 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
7852 Fixed limit interface & usage to fix bugs with passive cooling
7855 Restructured PRT support.
7858 ----------------------------------------
7859 Summary of changes for this label: 02_14_02
7862 1) ACPI CA Core Subsystem:
7864 Implemented support in AcpiLoadTable to allow loading of FACS and
7867 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
7868 been removed. All 64-bit platforms should be migrated to the ACPI
7869 2.0 tables. The actbl71.h header has been removed from the source
7872 All C macros defined within the subsystem have been prefixed with
7873 "ACPI_" to avoid collision with other system include files.
7875 Removed the return value for the two AcpiOsPrint interfaces, since
7876 it is never used and causes lint warnings for ignoring the return
7879 Added error checking to all internal mutex acquire and release
7880 calls. Although a failure from one of these interfaces is
7881 probably a fatal system error, these checks will cause the
7882 immediate abort of the currently executing method or interface.
7884 Fixed a problem where the AcpiSetCurrentResources interface could
7885 fault. This was a side effect of the deployment of the new memory
7888 Fixed a couple of problems with the Global Lock support introduced
7889 in the last major build. The "common" (1.0/2.0) internal FACS was
7890 being overwritten with the FACS signature and clobbering the
7891 Global Lock pointer. Also, the actual firmware FACS was being
7892 unmapped after construction of the "common" FACS, preventing
7893 access to the actual Global Lock field within it. The "common"
7894 internal FACS is no longer installed as an actual ACPI table; it
7895 is used simply as a global.
7897 Code and Data Size: Current core subsystem library sizes are shown
7898 below. These are the code and data sizes for the acpica.lib
7899 produced by the Microsoft Visual C++ 6.0 compiler, and these
7900 values do not include any ACPI driver or OSPM code. The debug
7901 version of the code includes the debug output trace mechanism and
7902 has a larger code and data size. Note that these values will vary
7903 depending on the efficiency of the compiler and the compiler
7904 options used during generation.
7906 Previous Release (02_07_01)
7907 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7908 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7910 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7911 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7916 Updated Linux-specific code for core macro and OSL interface
7917 changes described above.
7919 Improved /proc/acpi/event. It now can be opened only once and has
7920 proper poll functionality.
7922 Fixed and restructured power management (acpi_bus).
7924 Only create /proc "view by type" when devices of that class exist.
7926 Fixed "charging/discharging" bug (and others) in acpi_battery.
7928 Improved thermal zone code.
7931 3) ASL Compiler, version X2039:
7934 Implemented the new compiler restriction on ASL String hex/octal
7935 escapes to non-null, ASCII values. An error results if an invalid
7936 value is used. (This will require an ACPI 2.0 specification
7939 AML object labels that are output to the optional C and ASM source
7940 are now prefixed with both the ACPI table signature and table ID
7941 to help guarantee uniqueness within a large BIOS project.
7944 ----------------------------------------
7945 Summary of changes for this label: 02_01_02
7947 1) ACPI CA Core Subsystem:
7949 ACPI 2.0 support is complete in the entire Core Subsystem and the
7950 ASL compiler. All new ACPI 2.0 operators are implemented and all
7951 other changes for ACPI 2.0 support are complete. With
7952 simultaneous code and data optimizations throughout the subsystem,
7953 ACPI 2.0 support has been implemented with almost no additional
7954 cost in terms of code and data size.
7956 Implemented a new mechanism for allocation of return buffers. If
7957 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
7958 be allocated on behalf of the caller. Consolidated all return
7959 buffer validation and allocation to a common procedure. Return
7960 buffers will be allocated via the primary OSL allocation interface
7961 since it appears that a separate pool is not needed by most users.
7962 If a separate pool is required for these buffers, the caller can
7963 still use the original mechanism and pre-allocate the buffer(s).
7965 Implemented support for string operands within the DerefOf
7968 Restructured the Hardware and Event managers to be table driven,
7969 simplifying the source code and reducing the amount of generated
7972 Split the common read/write low-level ACPI register bitfield
7973 procedure into a separate read and write, simplifying the code
7976 Obsoleted the AcpiOsCallocate OSL interface. This interface was
7977 used only a handful of times and didn't have enough critical mass
7978 for a separate interface. Replaced with a common calloc procedure
7981 Fixed a reported problem with the GPE number mapping mechanism
7982 that allows GPE1 numbers to be non-contiguous with GPE0.
7983 Reorganized the GPE information and shrunk a large array that was
7984 originally large enough to hold info for all possible GPEs (256)
7985 to simply large enough to hold all GPEs up to the largest GPE
7986 number on the machine.
7988 Fixed a reported problem with resource structure alignment on 64-
7991 Changed the AcpiEnableEvent and AcpiDisableEvent external
7992 interfaces to not require any flags for the common case of
7993 enabling/disabling a GPE.
7995 Implemented support to allow a "Notify" on a Processor object.
7997 Most TBDs in comments within the source code have been resolved
8001 Fixed a problem in the interpreter where a standalone parent
8002 prefix (^) was not handled correctly in the interpreter and
8005 Removed obsolete and unnecessary GPE save/restore code.
8007 Implemented Field support in the ASL Load operator. This allows a
8008 table to be loaded from a named field, in addition to loading a
8009 table directly from an Operation Region.
8011 Implemented timeout and handle support in the external Global Lock
8014 Fixed a problem in the AcpiDump utility where pathnames were no
8015 longer being generated correctly during the dump of named objects.
8017 Modified the AML debugger to give a full display of if/while
8018 predicates instead of just one AML opcode at a time. (The
8019 predicate can have several nested ASL statements.) The old method
8020 was confusing during single stepping.
8022 Code and Data Size: Current core subsystem library sizes are shown
8023 below. These are the code and data sizes for the acpica.lib
8024 produced by the Microsoft Visual C++ 6.0 compiler, and these
8025 values do not include any ACPI driver or OSPM code. The debug
8026 version of the code includes the debug output trace mechanism and
8027 has a larger code and data size. Note that these values will vary
8028 depending on the efficiency of the compiler and the compiler
8029 options used during generation.
8031 Previous Release (12_18_01)
8032 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8033 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8035 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
8036 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8040 Implemented fix for PIIX reverse throttling errata (Processor
8043 Added new Limit interface (Processor and Thermal drivers)
8045 New thermal policy (Thermal driver)
8047 Many updates to /proc
8049 Battery "low" event support (Battery driver)
8051 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
8053 IA32 - IA64 initialization unification, no longer experimental
8055 Menuconfig options redesigned
8057 3) ASL Compiler, version X2037:
8059 Implemented several new output features to simplify integration of
8060 AML code into firmware: 1) Output the AML in C source code with
8061 labels for each named ASL object. The original ASL source code
8062 is interleaved as C comments. 2) Output the AML in ASM source code
8063 with labels and interleaved ASL source. 3) Output the AML in
8064 raw hex table form, in either C or ASM.
8066 Implemented support for optional string parameters to the
8069 Completed support for embedded escape sequences within string
8070 literals. The compiler now supports all single character escapes
8071 as well as the Octal and Hex escapes. Note: the insertion of a
8072 null byte into a string literal (via the hex/octal escape) causes
8073 the string to be immediately terminated. A warning is issued.
8075 Fixed a problem where incorrect AML was generated for the case
8076 where an ASL namepath consists of a single parent prefix (
8078 ) with no trailing name segments.
8080 The compiler has been successfully generated with a 64-bit C
8086 ----------------------------------------
8087 Summary of changes for this label: 12_18_01
8091 Enhanced blacklist with reason and severity fields. Any table's
8092 signature may now be used to identify a blacklisted system.
8094 Call _PIC control method to inform the firmware which interrupt
8095 model the OS is using. Turn on any disabled link devices.
8097 Cleaned up busmgr /proc error handling (Andreas Dilger)
8099 2) ACPI CA Core Subsystem:
8101 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
8104 Completed implementation of the ACPI 2.0 "Continue",
8105 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
8106 operators. All new ACPI 2.0 operators are now implemented in both
8107 the ASL compiler and the AML interpreter. The only remaining ACPI
8108 2.0 task is support for the String data type in the DerefOf
8109 operator. Fixed a problem with AcquireMutex where the status code
8110 was lost if the caller had to actually wait for the mutex.
8112 Increased the maximum ASL Field size from 64K bits to 4G bits.
8114 Completed implementation of the external Global Lock interfaces --
8115 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
8116 Handler parameters were added.
8118 Completed another pass at removing warnings and issues when
8119 compiling with 64-bit compilers. The code now compiles cleanly
8120 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
8121 add and subtract (diff) macros have changed considerably.
8124 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
8125 64-bit platforms, 32-bits on all others. This type is used
8126 wherever memory allocation and/or the C sizeof() operator is used,
8127 and affects the OSL memory allocation interfaces AcpiOsAllocate
8128 and AcpiOsCallocate.
8130 Implemented sticky user breakpoints in the AML debugger.
8132 Code and Data Size: Current core subsystem library sizes are shown
8133 below. These are the code and data sizes for the acpica.lib
8134 produced by the Microsoft Visual C++ 6.0 compiler, and these
8135 values do not include any ACPI driver or OSPM code. The debug
8136 version of the code includes the debug output trace mechanism and
8137 has a larger code and data size. Note that these values will vary
8138 depending on the efficiency of the compiler and the compiler
8139 options used during generation.
8141 Previous Release (12_05_01)
8142 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8143 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8145 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8146 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8148 3) ASL Compiler, version X2034:
8150 Now checks for (and generates an error if detected) the use of a
8151 Break or Continue statement without an enclosing While statement.
8154 Successfully generated the compiler with the Intel 64-bit C
8157 ----------------------------------------
8158 Summary of changes for this label: 12_05_01
8160 1) ACPI CA Core Subsystem:
8162 The ACPI 2.0 CopyObject operator is fully implemented. This
8163 operator creates a new copy of an object (and is also used to
8164 bypass the "implicit conversion" mechanism of the Store operator.)
8166 The ACPI 2.0 semantics for the SizeOf operator are fully
8167 implemented. The change is that performing a SizeOf on a
8168 reference object causes an automatic dereference of the object to
8169 tha actual value before the size is evaluated. This behavior was
8170 undefined in ACPI 1.0.
8172 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
8173 have been implemented. The interrupt polarity and mode are now
8176 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
8177 appearing in Package objects were not properly converted to
8178 integers when the internal Package was converted to an external
8179 object (via the AcpiEvaluateObject interface.)
8181 Fixed a problem with the namespace object deletion mechanism for
8182 objects created by control methods. There were two parts to this
8183 problem: 1) Objects created during the initialization phase method
8184 parse were not being deleted, and 2) The object owner ID mechanism
8185 to track objects was broken.
8187 Fixed a problem where the use of the ASL Scope operator within a
8188 control method would result in an invalid opcode exception.
8190 Fixed a problem introduced in the previous label where the buffer
8191 length required for the _PRT structure was not being returned
8194 Code and Data Size: Current core subsystem library sizes are shown
8195 below. These are the code and data sizes for the acpica.lib
8196 produced by the Microsoft Visual C++ 6.0 compiler, and these
8197 values do not include any ACPI driver or OSPM code. The debug
8198 version of the code includes the debug output trace mechanism and
8199 has a larger code and data size. Note that these values will vary
8200 depending on the efficiency of the compiler and the compiler
8201 options used during generation.
8203 Previous Release (11_20_01)
8204 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8205 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8208 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8209 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8213 Updated all files to apply cleanly against 2.4.16.
8215 Added basic PCI Interrupt Routing Table (PRT) support for IA32
8216 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
8217 version supports both static and dyanmic PRT entries, but dynamic
8218 entries are treated as if they were static (not yet
8219 reconfigurable). Architecture- specific code to use this data is
8220 absent on IA32 but should be available shortly.
8222 Changed the initialization sequence to start the ACPI interpreter
8223 (acpi_init) prior to initialization of the PCI driver (pci_init)
8224 in init/main.c. This ordering is required to support PRT and
8225 facilitate other (future) enhancement. A side effect is that the
8226 ACPI bus driver and certain device drivers can no longer be loaded
8229 Modified the 'make menuconfig' options to allow PCI Interrupt
8230 Routing support to be included without the ACPI Bus and other
8233 3) ASL Compiler, version X2033:
8235 Fixed some issues with the use of the new CopyObject and
8236 DataTableRegion operators. Both are fully functional.
8238 ----------------------------------------
8239 Summary of changes for this label: 11_20_01
8241 20 November 2001. Summary of changes for this release.
8243 1) ACPI CA Core Subsystem:
8245 Updated Index support to match ACPI 2.0 semantics. Storing a
8246 Integer, String, or Buffer to an Index of a Buffer will store only
8247 the least-significant byte of the source to the Indexed buffer
8248 byte. Multiple writes are not performed.
8250 Fixed a problem where the access type used in an AccessAs ASL
8251 operator was not recorded correctly into the field object.
8253 Fixed a problem where ASL Event objects were created in a
8254 signalled state. Events are now created in an unsignalled state.
8256 The internal object cache is now purged after table loading and
8257 initialization to reduce the use of dynamic kernel memory -- on
8258 the assumption that object use is greatest during the parse phase
8259 of the entire table (versus the run-time use of individual control
8262 ACPI 2.0 variable-length packages are now fully operational.
8264 Code and Data Size: Code and Data optimizations have permitted new
8265 feature development with an actual reduction in the library size.
8266 Current core subsystem library sizes are shown below. These are
8267 the code and data sizes for the acpica.lib produced by the
8268 Microsoft Visual C++ 6.0 compiler, and these values do not include
8269 any ACPI driver or OSPM code. The debug version of the code
8270 includes the debug output trace mechanism and has a larger code
8271 and data size. Note that these values will vary depending on the
8272 efficiency of the compiler and the compiler options used during
8275 Previous Release (11_09_01):
8276 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8277 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8280 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8281 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8285 Enhanced the ACPI boot-time initialization code to allow the use
8286 of Local APIC tables for processor enumeration on IA-32, and to
8287 pave the way for a fully MPS-free boot (on SMP systems) in the
8288 near future. This functionality replaces
8289 arch/i386/kernel/acpitables.c, which was introduced in an earlier
8290 2.4.15-preX release. To enable this feature you must add
8291 "acpi_boot=on" to the kernel command line -- see the help entry
8292 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
8295 Restructured the configuration options to allow boot-time table
8296 parsing support without inclusion of the ACPI Interpreter (and
8299 NOTE: This release does not include fixes for the reported events,
8300 power-down, and thermal passive cooling issues (coming soon).
8304 Added additional typechecking for Fields within restricted access
8305 Operation Regions. All fields within EC and CMOS regions must be
8306 declared with ByteAcc. All fields withing SMBus regions must be
8307 declared with the BufferAcc access type.
8309 Fixed a problem where the listing file output of control methods
8310 no longer interleaved the actual AML code with the ASL source
8316 ----------------------------------------
8317 Summary of changes for this label: 11_09_01
8319 1) ACPI CA Core Subsystem:
8321 Implemented ACPI 2.0-defined support for writes to fields with a
8322 Buffer, String, or Integer source operand that is smaller than the
8323 target field. In these cases, the source operand is zero-extended
8324 to fill the target field.
8326 Fixed a problem where a Field starting bit offset (within the
8327 parent operation region) was calculated incorrectly if the
8329 alignment of the field differed from the access width. This
8330 affected CreateWordField, CreateDwordField, CreateQwordField, and
8331 possibly other fields that use the "AccessAny" keyword.
8333 Fixed a problem introduced in the 11_02_01 release where indirect
8334 stores through method arguments did not operate correctly.
8338 Implemented boot-time ACPI table parsing support
8339 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
8340 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
8341 legacy BIOS interfaces (e.g. MPS) for the configuration of system
8342 processors, memory, and interrupts during setup_arch(). Note that
8343 this patch does not include the required architecture-specific
8344 changes required to apply this information -- subsequent patches
8345 will be posted for both IA32 and IA64 to achieve this.
8347 Added low-level sleep support for IA32 platforms, courtesy of Pat
8348 Mochel. This allows IA32 systems to transition to/from various
8349 sleeping states (e.g. S1, S3), although the lack of a centralized
8350 driver model and power-manageable drivers will prevent its
8351 (successful) use on most systems.
8353 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
8354 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
8355 tables" option, etc.
8357 Increased the default timeout for the EC driver from 1ms to 10ms
8358 (1000 cycles of 10us) to try to address AE_TIME errors during EC
8361 ----------------------------------------
8362 Summary of changes for this label: 11_02_01
8364 1) ACPI CA Core Subsystem:
8366 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
8367 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
8370 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
8371 changes to support ACPI 2.0 Qword field access. Read/Write
8372 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
8373 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
8374 the value parameter for the address space handler interface is now
8375 an ACPI_INTEGER. OSL implementations of these interfaces must now
8376 handle the case where the Width parameter is 64.
8378 Index Fields: Fixed a problem where unaligned bit assembly and
8379 disassembly for IndexFields was not supported correctly.
8381 Index and Bank Fields: Nested Index and Bank Fields are now
8382 supported. During field access, a check is performed to ensure
8383 that the value written to an Index or Bank register is not out of
8384 the range of the register. The Index (or Bank) register is
8385 written before each access to the field data. Future support will
8386 include allowing individual IndexFields to be wider than the
8389 Fields: Fixed a problem where the AML interpreter was incorrectly
8390 attempting to write beyond the end of a Field/OpRegion. This was
8391 a boundary case that occurred when a DWORD field was written to a
8392 BYTE access OpRegion, forcing multiple writes and causing the
8393 interpreter to write one datum too many.
8395 Fields: Fixed a problem with Field/OpRegion access where the
8396 starting bit address of a field was incorrectly calculated if the
8397 current access type was wider than a byte (WordAcc, DwordAcc, or
8400 Fields: Fixed a problem where forward references to individual
8401 FieldUnits (individual Field names within a Field definition) were
8402 not resolved during the AML table load.
8404 Fields: Fixed a problem where forward references from a Field
8405 definition to the parent Operation Region definition were not
8406 resolved during the AML table load.
8408 Fields: Duplicate FieldUnit names within a scope are now detected
8409 during AML table load.
8411 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
8412 returned an incorrect name for the root node.
8414 Code and Data Size: Code and Data optimizations have permitted new
8415 feature development with an actual reduction in the library size.
8416 Current core subsystem library sizes are shown below. These are
8417 the code and data sizes for the acpica.lib produced by the
8418 Microsoft Visual C++ 6.0 compiler, and these values do not include
8419 any ACPI driver or OSPM code. The debug version of the code
8420 includes the debug output trace mechanism and has a larger code
8421 and data size. Note that these values will vary depending on the
8422 efficiency of the compiler and the compiler options used during
8425 Previous Release (10_18_01):
8426 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8427 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8430 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8431 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8435 Improved /proc processor output (Pavel Machek) Re-added
8436 MODULE_LICENSE("GPL") to all modules.
8438 3) ASL Compiler version X2030:
8440 Duplicate FieldUnit names within a scope are now detected and
8445 Programmer Reference updated to reflect OSL and address space
8446 handler interface changes described above.
8448 ----------------------------------------
8449 Summary of changes for this label: 10_18_01
8451 ACPI CA Core Subsystem:
8453 Fixed a problem with the internal object reference count mechanism
8454 that occasionally caused premature object deletion. This resolves
8455 all of the outstanding problem reports where an object is deleted
8456 in the middle of an interpreter evaluation. Although this problem
8457 only showed up in rather obscure cases, the solution to the
8458 problem involved an adjustment of all reference counts involving
8459 objects attached to namespace nodes.
8461 Fixed a problem with Field support in the interpreter where
8462 writing to an aligned field whose length is an exact multiple (2
8463 or greater) of the field access granularity would cause an attempt
8464 to write beyond the end of the field.
8466 The top level AML opcode execution functions within the
8467 interpreter have been renamed with a more meaningful and
8468 consistent naming convention. The modules exmonad.c and
8469 exdyadic.c were eliminated. New modules are exoparg1.c,
8470 exoparg2.c, exoparg3.c, and exoparg6.c.
8472 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
8474 Fixed a problem where the AML debugger was causing some internal
8475 objects to not be deleted during subsystem termination.
8477 Fixed a problem with the external AcpiEvaluateObject interface
8478 where the subsystem would fault if the named object to be
8479 evaluated refered to a constant such as Zero, Ones, etc.
8481 Fixed a problem with IndexFields and BankFields where the
8482 subsystem would fault if the index, data, or bank registers were
8483 not defined in the same scope as the field itself.
8485 Added printf format string checking for compilers that support
8486 this feature. Corrected more than 50 instances of issues with
8487 format specifiers within invocations of ACPI_DEBUG_PRINT
8488 throughout the core subsystem code.
8490 The ASL "Revision" operator now returns the ACPI support level
8491 implemented in the core - the value "2" since the ACPI 2.0 support
8492 is more than 50% implemented.
8494 Enhanced the output of the AML debugger "dump namespace" command
8495 to output in a more human-readable form.
8497 Current core subsystem library code sizes are shown below. These
8499 are the code and data sizes for the acpica.lib produced by the
8500 Microsoft Visual C++ 6.0 compiler, and these values do not include
8501 any ACPI driver or OSPM code. The debug version of the code
8502 includes the full debug trace mechanism -- leading to a much
8504 larger code and data size. Note that these values will vary
8505 depending on the efficiency of the compiler and the compiler
8506 options used during generation.
8508 Previous Label (09_20_01):
8509 Non-Debug Version: 65K Code, 5K Data, 70K Total
8510 Debug Version: 138K Code, 58K Data, 196K Total
8514 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8515 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8519 Implemented a "Bad BIOS Blacklist" to track machines that have
8520 known ASL/AML problems.
8522 Enhanced the /proc interface for the thermal zone driver and added
8523 support for _HOT (the critical suspend trip point). The 'info'
8524 file now includes threshold/policy information, and allows setting
8525 of _SCP (cooling preference) and _TZP (polling frequency) values
8526 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
8527 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
8528 preference to the passive/quiet mode (if supported by the ASL).
8530 Implemented a workaround for a gcc bug that resuted in an OOPs
8531 when loading the control method battery driver.
8533 ----------------------------------------
8534 Summary of changes for this label: 09_20_01
8536 ACPI CA Core Subsystem:
8538 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
8539 modified to allow individual GPE levels to be flagged as wake-
8540 enabled (i.e., these GPEs are to remain enabled when the platform
8543 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
8544 support wake-enabled GPEs. This means that upon entering the
8545 sleep state, all GPEs that are not wake-enabled are disabled.
8546 When leaving the sleep state, these GPEs are reenabled.
8548 A local double-precision divide/modulo module has been added to
8549 enhance portability to OS kernels where a 64-bit math library is
8550 not available. The new module is "utmath.c".
8552 Several optimizations have been made to reduce the use of CPU
8553 stack. Originally over 2K, the maximum stack usage is now below
8554 2K at 1860 bytes (1.82k)
8556 Fixed a problem with the AcpiGetFirmwareTable interface where the
8557 root table pointer was not mapped into a logical address properly.
8559 Fixed a problem where a NULL pointer was being dereferenced in the
8560 interpreter code for the ASL Notify operator.
8562 Fixed a problem where the use of the ASL Revision operator
8563 returned an error. This operator now returns the current version
8564 of the ACPI CA core subsystem.
8566 Fixed a problem where objects passed as control method parameters
8567 to AcpiEvaluateObject were always deleted at method termination.
8568 However, these objects may end up being stored into the namespace
8569 by the called method. The object reference count mechanism was
8570 applied to these objects instead of a force delete.
8572 Fixed a problem where static strings or buffers (contained in the
8573 AML code) that are declared as package elements within the ASL
8574 code could cause a fault because the interpreter would attempt to
8575 delete them. These objects are now marked with the "static
8576 object" flag to prevent any attempt to delete them.
8578 Implemented an interpreter optimization to use operands directly
8579 from the state object instead of extracting the operands to local
8580 variables. This reduces stack use and code size, and improves
8583 The module exxface.c was eliminated as it was an unnecessary extra
8586 Current core subsystem library code sizes are shown below. These
8587 are the code and data sizes for the acpica.lib produced by the
8588 Microsoft Visual C++ 6.0 compiler, and these values do not include
8589 any ACPI driver or OSPM code. The debug version of the code
8590 includes the full debug trace mechanism -- leading to a much
8591 larger code and data size. Note that these values will vary
8592 depending on the efficiency of the compiler and the compiler
8593 options used during generation.
8595 Non-Debug Version: 65K Code, 5K Data, 70K Total
8596 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
8597 Total (Previously 195K)
8601 Support for ACPI 2.0 64-bit integers has been added. All ACPI
8602 Integer objects are now 64 bits wide
8604 All Acpi data types and structures are now in lower case. Only
8605 Acpi macros are upper case for differentiation.
8609 Changes to the external interfaces as described above.
8611 ----------------------------------------
8612 Summary of changes for this label: 08_31_01
8614 ACPI CA Core Subsystem:
8616 A bug with interpreter implementation of the ASL Divide operator
8617 was found and fixed. The implicit function return value (not the
8618 explicit store operands) was returning the remainder instead of
8619 the quotient. This was a longstanding bug and it fixes several
8620 known outstanding issues on various platforms.
8622 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
8623 been further optimized for size. There are 700 invocations of the
8624 DEBUG_PRINT macro alone, so each optimization reduces the size of
8625 the debug version of the subsystem significantly.
8627 A stack trace mechanism has been implemented. The maximum stack
8628 usage is about 2K on 32-bit platforms. The debugger command "stat
8629 stack" will display the current maximum stack usage.
8631 All public symbols and global variables within the subsystem are
8632 now prefixed with the string "Acpi". This keeps all of the
8633 symbols grouped together in a kernel map, and avoids conflicts
8634 with other kernel subsystems.
8636 Most of the internal fixed lookup tables have been moved into the
8637 code segment via the const operator.
8639 Several enhancements have been made to the interpreter to both
8640 reduce the code size and improve performance.
8642 Current core subsystem library code sizes are shown below. These
8643 are the code and data sizes for the acpica.lib produced by the
8644 Microsoft Visual C++ 6.0 compiler, and these values do not include
8645 any ACPI driver or OSPM code. The debug version of the code
8646 includes the full debug trace mechanism which contains over 700
8647 invocations of the DEBUG_PRINT macro, 500 function entry macro
8648 invocations, and over 900 function exit macro invocations --
8649 leading to a much larger code and data size. Note that these
8650 values will vary depending on the efficiency of the compiler and
8651 the compiler options used during generation.
8653 Non-Debug Version: 64K Code, 5K Data, 69K Total
8654 Debug Version: 137K Code, 58K Data, 195K Total
8658 Implemented wbinvd() macro, pending a kernel-wide definition.
8660 Fixed /proc/acpi/event to handle poll() and short reads.
8662 ASL Compiler, version X2026:
8664 Fixed a problem introduced in the previous label where the AML
8666 code emitted for package objects produced packages with zero
8669 ----------------------------------------
8670 Summary of changes for this label: 08_16_01
8672 ACPI CA Core Subsystem:
8674 The following ACPI 2.0 ASL operators have been implemented in the
8675 AML interpreter (These are already supported by the Intel ASL
8676 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
8677 ToBuffer. Support for 64-bit AML constants is implemented in the
8678 AML parser, debugger, and disassembler.
8680 The internal memory tracking mechanism (leak detection code) has
8681 been upgraded to reduce the memory overhead (a separate tracking
8682 block is no longer allocated for each memory allocation), and now
8683 supports all of the internal object caches.
8685 The data structures and code for the internal object caches have
8686 been coelesced and optimized so that there is a single cache and
8687 memory list data structure and a single group of functions that
8688 implement generic cache management. This has reduced the code
8689 size in both the debug and release versions of the subsystem.
8691 The DEBUG_PRINT macro(s) have been optimized for size and replaced
8692 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
8693 different, because it generates a single call to an internal
8694 function. This results in a savings of about 90 bytes per
8695 invocation, resulting in an overall code and data savings of about
8696 16% in the debug version of the subsystem.
8700 Fixed C3 disk corruption problems and re-enabled C3 on supporting
8703 Integrated low-level sleep code by Patrick Mochel.
8705 Further tweaked source code Linuxization.
8711 Support for ACPI 2.0 variable length packages is fixed/completed.
8713 Fixed a problem where the optional length parameter for the ACPI
8714 2.0 ToString operator.
8716 Fixed multiple extraneous error messages when a syntax error is
8717 detected within the declaration line of a control method.
8719 ----------------------------------------
8720 Summary of changes for this label: 07_17_01
8722 ACPI CA Core Subsystem:
8724 Added a new interface named AcpiGetFirmwareTable to obtain any
8725 ACPI table via the ACPI signature. The interface can be called at
8726 any time during kernel initialization, even before the kernel
8727 virtual memory manager is initialized and paging is enabled. This
8728 allows kernel subsystems to obtain ACPI tables very early, even
8729 before the ACPI CA subsystem is initialized.
8731 Fixed a problem where Fields defined with the AnyAcc attribute
8732 could be resolved to the incorrect address under the following
8733 conditions: 1) the field width is larger than 8 bits and 2) the
8734 parent operation region is not defined on a DWORD boundary.
8736 Fixed a problem where the interpreter is not being locked during
8737 namespace initialization (during execution of the _INI control
8738 methods), causing an error when an attempt is made to release it
8741 ACPI 2.0 support in the AML Interpreter has begun and will be
8742 ongoing throughout the rest of this year. In this label, The Mod
8743 operator is implemented.
8745 Added a new data type to contain full PCI addresses named
8746 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
8747 and Function values.
8751 Enhanced the Linux version of the source code to change most
8752 capitalized ACPI type names to lowercase. For example, all
8753 instances of ACPI_STATUS are changed to acpi_status. This will
8754 result in a large diff, but the change is strictly cosmetic and
8755 aligns the CA code closer to the Linux coding standard.
8759 The interfaces to the PCI configuration space have been changed to
8760 add the PCI Segment number and to split the single 32-bit combined
8761 DeviceFunction field into two 16-bit fields. This was
8762 accomplished by moving the four values that define an address in
8763 PCI configuration space (segment, bus, device, and function) to
8764 the new ACPI_PCI_ID structure.
8766 The changes to the PCI configuration space interfaces led to a
8767 reexamination of the complete set of address space access
8768 interfaces for PCI, I/O, and Memory. The previously existing 18
8769 interfaces have proven difficult to maintain (any small change
8770 must be propagated across at least 6 interfaces) and do not easily
8771 allow for future expansion to 64 bits if necessary. Also, on some
8772 systems, it would not be appropriate to demultiplex the access
8773 width (8, 16, 32,or 64) before calling the OSL if the
8774 corresponding native OS interfaces contain a similar access width
8775 parameter. For these reasons, the 18 address space interfaces
8776 have been replaced by these 6 new ones:
8778 AcpiOsReadPciConfiguration
8779 AcpiOsWritePciConfiguration
8785 Added a new interface named AcpiOsGetRootPointer to allow the OSL
8786 to perform the platform and/or OS-specific actions necessary to
8787 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
8788 interface will simply call down to the CA core to perform the low-
8789 memory search for the table. On IA-64, the RSDP is obtained from
8790 EFI. Migrating this interface to the OSL allows the CA core to
8792 remain OS and platform independent.
8794 Added a new interface named AcpiOsSignal to provide a generic
8795 "function code and pointer" interface for various miscellaneous
8796 signals and notifications that must be made to the host OS. The
8797 first such signals are intended to support the ASL Fatal and
8798 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
8799 interface has been obsoleted.
8801 The definition of the AcpiFormatException interface has been
8802 changed to simplify its use. The caller no longer must supply a
8803 buffer to the call; A pointer to a const string is now returned
8804 directly. This allows the call to be easily used in printf
8805 statements, etc. since the caller does not have to manage a local
8809 ASL Compiler, Version X2025:
8811 The ACPI 2.0 Switch/Case/Default operators have been implemented
8812 and are fully functional. They will work with all ACPI 1.0
8813 interpreters, since the operators are simply translated to If/Else
8816 The ACPI 2.0 ElseIf operator is implemented and will also work
8817 with 1.0 interpreters, for the same reason.
8819 Implemented support for ACPI 2.0 variable-length packages. These
8820 packages have a separate opcode, and their size is determined by
8821 the interpreter at run-time.
8823 Documentation The ACPI CA Programmer Reference has been updated to
8824 reflect the new interfaces and changes to existing interfaces.
8826 ------------------------------------------
8827 Summary of changes for this label: 06_15_01
8829 ACPI CA Core Subsystem:
8831 Fixed a problem where a DWORD-accessed field within a Buffer
8832 object would get its byte address inadvertently rounded down to
8833 the nearest DWORD. Buffers are always Byte-accessible.
8835 ASL Compiler, version X2024:
8837 Fixed a problem where the Switch() operator would either fault or
8838 hang the compiler. Note however, that the AML code for this ACPI
8839 2.0 operator is not yet implemented.
8841 Compiler uses the new AcpiOsGetTimer interface to obtain compile
8844 Implementation of the CreateField operator automatically converts
8845 a reference to a named field within a resource descriptor from a
8846 byte offset to a bit offset if required.
8848 Added some missing named fields from the resource descriptor
8849 support. These are the names that are automatically created by the
8850 compiler to reference fields within a descriptor. They are only
8851 valid at compile time and are not passed through to the AML
8854 Resource descriptor named fields are now typed as Integers and
8855 subject to compile-time typechecking when used in expressions.
8857 ------------------------------------------
8858 Summary of changes for this label: 05_18_01
8860 ACPI CA Core Subsystem:
8862 Fixed a couple of problems in the Field support code where bits
8863 from adjacent fields could be returned along with the proper field
8864 bits. Restructured the field support code to improve performance,
8865 readability and maintainability.
8867 New DEBUG_PRINTP macro automatically inserts the procedure name
8868 into the output, saving hundreds of copies of procedure name
8869 strings within the source, shrinking the memory footprint of the
8870 debug version of the core subsystem.
8872 Source Code Structure:
8874 The source code directory tree was restructured to reflect the
8875 current organization of the component architecture. Some files
8876 and directories have been moved and/or renamed.
8880 Fixed leaking kacpidpc processes.
8882 Fixed queueing event data even when /proc/acpi/event is not
8885 ASL Compiler, version X2020:
8887 Memory allocation performance enhancement - over 24X compile time
8888 improvement on large ASL files. Parse nodes and namestring
8889 buffers are now allocated from a large internal compiler buffer.
8891 The temporary .SRC file is deleted unless the "-s" option is
8894 The "-d" debug output option now sends all output to the .DBG file
8895 instead of the console.
8897 "External" second parameter is now optional
8899 "ElseIf" syntax now properly allows the predicate
8901 Last operand to "Load" now recognized as a Target operand
8903 Debug object can now be used anywhere as a normal object.
8905 ResourceTemplate now returns an object of type BUFFER
8907 EISAID now returns an object of type INTEGER
8909 "Index" now works with a STRING operand
8911 "LoadTable" now accepts optional parameters
8913 "ToString" length parameter is now optional
8915 "Interrupt (ResourceType," parse error fixed.
8917 "Register" with a user-defined region space parse error fixed
8919 Escaped backslash at the end of a string ("\\") scan/parse error
8922 "Revision" is now an object of type INTEGER.
8926 ------------------------------------------
8927 Summary of changes for this label: 05_02_01
8931 /proc/acpi/event now blocks properly.
8933 Removed /proc/sys/acpi. You can still dump your DSDT from
8936 ACPI CA Core Subsystem:
8938 Fixed a problem introduced in the previous label where some of the
8939 "small" resource descriptor types were not recognized.
8941 Improved error messages for the case where an ASL Field is outside
8942 the range of the parent operation region.
8944 ASL Compiler, version X2018:
8947 Added error detection for ASL Fields that extend beyond the length
8948 of the parent operation region (only if the length of the region
8949 is known at compile time.) This includes fields that have a
8950 minimum access width that is smaller than the parent region, and
8951 individual field units that are partially or entirely beyond the
8952 extent of the parent.
8956 ------------------------------------------
8957 Summary of changes for this label: 04_27_01
8959 ACPI CA Core Subsystem:
8961 Fixed a problem where the namespace mutex could be released at the
8962 wrong time during execution of AcpiRemoveAddressSpaceHandler.
8964 Added optional thread ID output for debug traces, to simplify
8965 debugging of multiple threads. Added context switch notification
8966 when the debug code realizes that a different thread is now
8967 executing ACPI code.
8969 Some additional external data types have been prefixed with the
8970 string "ACPI_" for consistency. This may effect existing code.
8971 The data types affected are the external callback typedefs - e.g.,
8973 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
8977 Fixed an issue with the OSL semaphore implementation where a
8978 thread was waking up with an error from receiving a SIGCHLD
8981 Linux version of ACPI CA now uses the system C library for string
8982 manipulation routines instead of a local implementation.
8984 Cleaned up comments and removed TBDs.
8986 ASL Compiler, version X2017:
8988 Enhanced error detection and reporting for all file I/O
8993 Programmer Reference updated to version 1.06.
8997 ------------------------------------------
8998 Summary of changes for this label: 04_13_01
9000 ACPI CA Core Subsystem:
9002 Restructured support for BufferFields and RegionFields.
9003 BankFields support is now fully operational. All known 32-bit
9004 limitations on field sizes have been removed. Both BufferFields
9005 and (Operation) RegionFields are now supported by the same field
9008 Resource support now supports QWORD address and IO resources. The
9009 16/32/64 bit address structures and the Extended IRQ structure
9010 have been changed to properly handle Source Resource strings.
9012 A ThreadId of -1 is now used to indicate a "mutex not acquired"
9013 condition internally and must never be returned by AcpiOsThreadId.
9014 This reserved value was changed from 0 since Unix systems allow a
9019 Driver code reorganized to enhance portability
9021 Added a kernel configuration option to control ACPI_DEBUG
9023 Fixed the EC driver to honor _GLK.
9025 ASL Compiler, version X2016:
9027 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
9028 address space was set to 0, not 0x7f as it should be.
9030 ------------------------------------------
9031 Summary of changes for this label: 03_13_01
9033 ACPI CA Core Subsystem:
9035 During ACPI initialization, the _SB_._INI method is now run if
9038 Notify handler fix - notifies are deferred until the parent method
9039 completes execution. This fixes the "mutex already acquired"
9040 issue seen occasionally.
9042 Part of the "implicit conversion" rules in ACPI 2.0 have been
9043 found to cause compatibility problems with existing ASL/AML. The
9044 convert "result-to-target-type" implementation has been removed
9045 for stores to method Args and Locals. Source operand conversion
9046 is still fully implemented. Possible changes to ACPI 2.0
9047 specification pending.
9049 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
9052 Fix for compiler warnings for 64-bit compiles.
9056 /proc output aligned for easier parsing.
9058 Release-version compile problem fixed.
9060 New kernel configuration options documented in Configure.help.
9062 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
9067 Power resource driver integrated with bus manager.
9069 Fixed kernel fault during active cooling for thermal zones.
9073 The source code tree has been restructured.
9077 ------------------------------------------
9078 Summary of changes for this label: 03_02_01
9080 Linux OS Services Layer (OSL):
9082 Major revision of all Linux-specific code.
9084 Modularized all ACPI-specific drivers.
9086 Added new thermal zone and power resource drivers.
9088 Revamped /proc interface (new functionality is under /proc/acpi).
9090 New kernel configuration options.
9094 New kernel configuration options not documented in Configure.help
9098 Module dependencies not currently implemented. If used, they
9099 should be loaded in this order: busmgr, power, ec, system,
9100 processor, battery, ac_adapter, button, thermal.
9102 Modules will not load if CONFIG_MODVERSION is set.
9104 IBM 600E - entering S5 may reboot instead of shutting down.
9106 IBM 600E - Sleep button may generate "Invalid <NULL> context"
9109 Some systems may fail with "execution mutex already acquired"
9112 ACPI CA Core Subsystem:
9114 Added a new OSL Interface, AcpiOsGetThreadId. This was required
9115 for the deadlock detection code. Defined to return a non-zero, 32-
9116 bit thread ID for the currently executing thread. May be a non-
9117 zero constant integer on single-thread systems.
9119 Implemented deadlock detection for internal subsystem mutexes. We
9120 may add conditional compilation for this code (debug only) later.
9122 ASL/AML Mutex object semantics are now fully supported. This
9123 includes multiple acquires/releases by owner and support for the
9125 Mutex SyncLevel parameter.
9127 A new "Force Release" mechanism automatically frees all ASL
9128 Mutexes that have been acquired but not released when a thread
9129 exits the interpreter. This forces conformance to the ACPI spec
9130 ("All mutexes must be released when an invocation exits") and
9131 prevents deadlocked ASL threads. This mechanism can be expanded
9132 (later) to monitor other resource acquisitions if OEM ASL code
9133 continues to misbehave (which it will).
9135 Several new ACPI exception codes have been added for the Mutex
9138 Recursive method calls are now allowed and supported (the ACPI
9139 spec does in fact allow recursive method calls.) The number of
9140 recursive calls is subject to the restrictions imposed by the
9141 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
9144 Implemented support for the SyncLevel parameter for control
9145 methods (ACPI 2.0 feature)
9147 Fixed a deadlock problem when multiple threads attempted to use
9150 Fixed a problem where the string length of a String package
9151 element was not always set in a package returned from
9154 Fixed a problem where the length of a String package element was
9155 not always included in the length of the overall package returned
9156 from AcpiEvaluateObject.
9158 Added external interfaces (Acpi*) to the ACPI debug memory
9159 manager. This manager keeps a list of all outstanding
9160 allocations, and can therefore detect memory leaks and attempts to
9161 free memory blocks more than once. Useful for code such as the
9162 power manager, etc. May not be appropriate for device drivers.
9163 Performance with the debug code enabled is slow.
9165 The ACPI Global Lock is now an optional hardware element.
9167 ASL Compiler Version X2015:
9169 Integrated changes to allow the compiler to be generated on
9172 Linux makefile added to generate the compiler on Linux
9176 All platform-specific headers have been moved to their own
9177 subdirectory, Include/Platform.
9179 New source file added, Interpreter/ammutex.c
9181 New header file, Include/acstruct.h
9185 The programmer reference has been updated for the following new
9186 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
9188 ------------------------------------------
9189 Summary of changes for this label: 02_08_01
9191 Core ACPI CA Subsystem: Fixed a problem where an error was
9192 incorrectly returned if the return resource buffer was larger than
9193 the actual data (in the resource interfaces).
9195 References to named objects within packages are resolved to the
9197 full pathname string before packages are returned directly (via
9198 the AcpiEvaluateObject interface) or indirectly via the resource
9201 Linux OS Services Layer (OSL):
9203 Improved /proc battery interface.
9206 Added C-state debugging output and other miscellaneous fixes.
9208 ASL Compiler Version X2014:
9210 All defined method arguments can now be used as local variables,
9211 including the ones that are not actually passed in as parameters.
9212 The compiler tracks initialization of the arguments and issues an
9213 exception if they are used without prior assignment (just like
9216 The -o option now specifies a filename prefix that is used for all
9217 output files, including the AML output file. Otherwise, the
9218 default behavior is as follows: 1) the AML goes to the file
9219 specified in the DSDT. 2) all other output files use the input
9220 source filename as the base.
9222 ------------------------------------------
9223 Summary of changes for this label: 01_25_01
9225 Core ACPI CA Subsystem: Restructured the implementation of object
9226 store support within the interpreter. This includes support for
9227 the Store operator as well as any ASL operators that include a
9230 Partially implemented support for Implicit Result-to-Target
9231 conversion. This is when a result object is converted on the fly
9232 to the type of an existing target object. Completion of this
9233 support is pending further analysis of the ACPI specification
9234 concerning this matter.
9236 CPU-specific code has been removed from the subsystem (hardware
9239 New Power Management Timer functions added
9241 Linux OS Services Layer (OSL): Moved system state transition code
9242 to the core, fixed it, and modified Linux OSL accordingly.
9244 Fixed C2 and C3 latency calculations.
9247 We no longer use the compilation date for the version message on
9248 initialization, but retrieve the version from AcpiGetSystemInfo().
9250 Incorporated for fix Sony VAIO machines.
9252 Documentation: The Programmer Reference has been updated and
9256 ASL Compiler: Version X2013: Fixed a problem where the line
9257 numbering and error reporting could get out of sync in the
9258 presence of multiple include files.
9260 ------------------------------------------
9261 Summary of changes for this label: 01_15_01
9263 Core ACPI CA Subsystem:
9265 Implemented support for type conversions in the execution of the
9266 ASL Concatenate operator (The second operand is converted to
9267 match the type of the first operand before concatenation.)
9269 Support for implicit source operand conversion is partially
9270 implemented. The ASL source operand types Integer, Buffer, and
9271 String are freely interchangeable for most ASL operators and are
9272 converted by the interpreter on the fly as required. Implicit
9273 Target operand conversion (where the result is converted to the
9274 target type before storing) is not yet implemented.
9276 Support for 32-bit and 64-bit BCD integers is implemented.
9278 Problem fixed where a field read on an aligned field could cause a
9279 read past the end of the field.
9281 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
9282 does not return a value, but the caller expects one. (The ASL
9283 compiler flags this as a warning.)
9288 1. Static typechecking of all operands is implemented. This
9289 prevents the use of invalid objects (such as using a Package where
9290 an Integer is required) at compile time instead of at interpreter
9292 2. The ASL source line is printed with ALL errors and warnings.
9293 3. Bug fix for source EOF without final linefeed.
9294 4. Debug option is split into a parse trace and a namespace trace.
9295 5. Namespace output option (-n) includes initial values for
9296 integers and strings.
9297 6. Parse-only option added for quick syntax checking.
9298 7. Compiler checks for duplicate ACPI name declarations
9301 1. Relaxed typechecking to allow interchangeability between
9302 strings, integers, and buffers. These types are now converted by
9303 the interpreter at runtime.
9304 2. Compiler reports time taken by each internal subsystem in the
9308 ------------------------------------------
9309 Summary of changes for this label: 12_14_00
9313 This is the first official release of the compiler. Since the
9314 compiler requires elements of the Core Subsystem, this label
9315 synchronizes everything.
9317 ------------------------------------------
9318 Summary of changes for this label: 12_08_00
9321 Fixed a problem where named references within the ASL definition
9322 of both OperationRegions and CreateXXXFields did not work
9323 properly. The symptom was an AE_AML_OPERAND_TYPE during
9324 initialization of the region/field. This is similar (but not
9325 related internally) to the problem that was fixed in the last
9328 Implemented both 32-bit and 64-bit support for the BCD ASL
9329 functions ToBCD and FromBCD.
9331 Updated all legal headers to include "2000" in the copyright
9334 ------------------------------------------
9335 Summary of changes for this label: 12_01_00
9337 Fixed a problem where method invocations within the ASL definition
9338 of both OperationRegions and CreateXXXFields did not work
9339 properly. The symptom was an AE_AML_OPERAND_TYPE during
9340 initialization of the region/field:
9342 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
9343 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
9346 Fixed a problem where operators with more than one nested
9347 subexpression would fail. The symptoms were varied, by mostly
9348 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
9349 problem that has gone unnoticed until now.
9351 Subtract (Add (1,2), Multiply (3,4))
9353 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
9354 previous build (The prefix part of a relative path was handled
9357 Fixed a problem where Operation Region initialization failed if
9358 the operation region name was a "namepath" instead of a simple
9359 "nameseg". Symptom was an AE_NO_OPERAND error.
9361 Fixed a problem where an assignment to a local variable via the
9362 indirect RefOf mechanism only worked for the first such
9363 assignment. Subsequent assignments were ignored.
9365 ------------------------------------------
9366 Summary of changes for this label: 11_15_00
9368 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
9369 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
9370 the AML interpreter does NOT have support for the new 2.0 ASL
9371 grammar terms at this time.
9373 All ACPI hardware access is via the GAS structures in the ACPI 2.0
9376 All physical memory addresses across all platforms are now 64 bits
9377 wide. Logical address width remains dependent on the platform
9380 AcpiOsMapMemory interface changed to a 64-bit physical address.
9382 The AML interpreter integer size is now 64 bits, as per the ACPI
9385 For backwards compatibility with ACPI 1.0, ACPI tables with a
9386 revision number less than 2 use 32-bit integers only.
9388 Fixed a problem where the evaluation of OpRegion operands did not
9389 always resolve them to numbers properly.
9391 ------------------------------------------
9392 Summary of changes for this label: 10_20_00
9394 Fix for CBN_._STA issue. This fix will allow correct access to
9395 CBN_ OpRegions when the _STA returns 0x8.
9397 Support to convert ACPI constants (Ones, Zeros, One) to actual
9398 values before a package object is returned
9400 Fix for method call as predicate to if/while construct causing
9401 incorrect if/while behavior
9403 Fix for Else block package lengths sometimes calculated wrong (if
9406 Fix for Processor object length field, was always zero
9408 Table load abort if FACP sanity check fails
9410 Fix for problem with Scope(name) if name already exists
9412 Warning emitted if a named object referenced cannot be found
9413 (resolved) during method execution.
9419 ------------------------------------------
9420 Summary of changes for this label: 9_29_00
9422 New table initialization interfaces: AcpiInitializeSubsystem no
9423 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
9424 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
9425 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
9428 Note: These interface changes require changes to all existing OSDs
9430 The PCI_Config default address space handler is always installed
9431 at the root namespace object.
9433 -------------------------------------------
9434 Summary of changes for this label: 09_15_00
9436 The new initialization architecture is implemented. New
9437 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
9438 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
9440 (Namespace is automatically loaded when a table is loaded)
9442 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
9443 52 bytes to 32 bytes. There is usually one of these for every
9444 namespace object, so the memory savings is significant.
9446 Implemented just-in-time evaluation of the CreateField operators.
9448 Bug fixes for IA-64 support have been integrated.
9450 Additional code review comments have been implemented
9452 The so-called "third pass parse" has been replaced by a final walk
9453 through the namespace to initialize all operation regions (address
9454 spaces) and fields that have not yet been initialized during the
9455 execution of the various _INI and REG methods.
9457 New file - namespace/nsinit.c
9459 -------------------------------------------
9460 Summary of changes for this label: 09_01_00
9462 Namespace manager data structures have been reworked to change the
9463 primary object from a table to a single object. This has
9464 resulted in dynamic memory savings of 3X within the namespace and
9465 2X overall in the ACPI CA subsystem.
9467 Fixed problem where the call to AcpiEvFindPciRootBuses was
9468 inadvertently left commented out.
9470 Reduced the warning count when generating the source with the GCC
9473 Revision numbers added to each module header showing the
9474 SourceSafe version of the file. Please refer to this version
9475 number when giving us feedback or comments on individual modules.
9477 The main object types within the subsystem have been renamed to
9478 clarify their purpose:
9480 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
9481 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
9482 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
9484 NOTE: no changes to the initialization sequence are included in
9487 -------------------------------------------
9488 Summary of changes for this label: 08_23_00
9490 Fixed problem where TerminateControlMethod was being called
9491 multiple times per method
9493 Fixed debugger problem where single stepping caused a semaphore to
9496 Improved performance through additional parse object caching -
9497 added ACPI_EXTENDED_OP type
9499 -------------------------------------------
9500 Summary of changes for this label: 08_10_00
9502 Parser/Interpreter integration: Eliminated the creation of
9503 complete parse trees for ACPI tables and control methods.
9504 Instead, parse subtrees are created and then deleted as soon as
9505 they are processed (Either entered into the namespace or executed
9506 by the interpreter). This reduces the use of dynamic kernel
9507 memory significantly. (about 10X)
9509 Exception codes broken into classes and renumbered. Be sure to
9510 recompile all code that includes acexcep.h. Hopefully we won't
9511 have to renumber the codes again now that they are split into
9512 classes (environment, programmer, AML code, ACPI table, and
9515 Fixed some additional alignment issues in the Resource Manager
9518 Implemented semaphore tracking in the AcpiExec utility, and fixed
9519 several places where mutexes/semaphores were being unlocked
9520 without a corresponding lock operation. There are no known
9521 semaphore or mutex "leaks" at this time.
9523 Fixed the case where an ASL Return operator is used to return an
9526 -------------------------------------------
9527 Summary of changes for this label: 07_28_00
9529 Fixed a problem with the way addresses were calculated in
9530 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
9531 manifested itself when a Field was created with WordAccess or
9532 DwordAccess, but the field unit defined within the Field was less
9534 than a Word or Dword.
9536 Fixed a problem in AmlDumpOperands() module's loop to pull
9537 operands off of the operand stack to display information. The
9538 problem manifested itself as a TLB error on 64-bit systems when
9539 accessing an operand stack with two or more operands.
9541 Fixed a problem with the PCI configuration space handlers where
9542 context was getting confused between accesses. This required a
9543 change to the generic address space handler and address space
9544 setup definitions. Handlers now get both a global handler context
9545 (this is the one passed in by the user when executing
9546 AcpiInstallAddressSpaceHandler() and a specific region context
9547 that is unique to each region (For example, the _ADR, _SEG and
9548 _BBN values associated with a specific region). The generic
9549 function definitions have changed to the following:
9551 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
9552 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
9553 *HandlerContext, // This used to be void *Context void
9554 *RegionContext); // This is an additional parameter
9556 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
9557 RegionHandle, UINT32 Function, void *HandlerContext, void
9558 **RegionContext); // This used to be **ReturnContext
9560 -------------------------------------------
9561 Summary of changes for this label: 07_21_00
9563 Major file consolidation and rename. All files within the
9564 interpreter have been renamed as well as most header files. This
9565 was done to prevent collisions with existing files in the host
9566 OSs -- filenames such as "config.h" and "global.h" seem to be
9567 quite common. The VC project files have been updated. All
9568 makefiles will require modification.
9570 The parser/interpreter integration continues in Phase 5 with the
9571 implementation of a complete 2-pass parse (the AML is parsed
9572 twice) for each table; This avoids the construction of a huge
9573 parse tree and therefore reduces the amount of dynamic memory
9574 required by the subsystem. Greater use of the parse object cache
9575 means that performance is unaffected.
9577 Many comments from the two code reviews have been rolled in.
9579 The 64-bit alignment support is complete.
9581 -------------------------------------------
9582 Summary of changes for this label: 06_30_00
9584 With a nod and a tip of the hat to the technology of yesteryear,
9585 we've added support in the source code for 80 column output
9586 devices. The code is now mostly constrained to 80 columns or
9587 less to support environments and editors that 1) cannot display
9588 or print more than 80 characters on a single line, and 2) cannot
9589 disable line wrapping.
9591 A major restructuring of the namespace data structure has been
9592 completed. The result is 1) cleaner and more
9593 understandable/maintainable code, and 2) a significant reduction
9594 in the dynamic memory requirement for each named ACPI object
9597 -------------------------------------------
9598 Summary of changes for this label: 06_23_00
9600 Linux support has been added. In order to obtain approval to get
9601 the ACPI CA subsystem into the Linux kernel, we've had to make
9602 quite a few changes to the base subsystem that will affect all
9603 users (all the changes are generic and OS- independent). The
9604 effects of these global changes have been somewhat far reaching.
9605 Files have been merged and/or renamed and interfaces have been
9606 renamed. The major changes are described below.
9608 Osd* interfaces renamed to AcpiOs* to eliminate namespace
9609 pollution/confusion within our target kernels. All OSD
9610 interfaces must be modified to match the new naming convention.
9612 Files merged across the subsystem. A number of the smaller source
9613 and header files have been merged to reduce the file count and
9614 increase the density of the existing files. There are too many
9615 to list here. In general, makefiles that call out individual
9616 files will require rebuilding.
9618 Interpreter files renamed. All interpreter files now have the
9619 prefix am* instead of ie* and is*.
9621 Header files renamed: The acapi.h file is now acpixf.h. The
9622 acpiosd.h file is now acpiosxf.h. We are removing references to
9623 the acronym "API" since it is somewhat windowsy. The new name is
9624 "external interface" or xface or xf in the filenames.j
9627 All manifest constants have been forced to upper case (some were
9628 mixed case.) Also, the string "ACPI_" has been prepended to many
9629 (not all) of the constants, typedefs, and structs.
9631 The globals "DebugLevel" and "DebugLayer" have been renamed
9632 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
9634 All other globals within the subsystem are now prefixed with
9635 "AcpiGbl_" Internal procedures within the subsystem are now
9636 prefixed with "Acpi" (with only a few exceptions). The original
9637 two-letter abbreviation for the subcomponent remains after "Acpi"
9638 - for example, CmCallocate became AcpiCmCallocate.
9640 Added a source code translation/conversion utility. Used to
9641 generate the Linux source code, it can be modified to generate
9642 other types of source as well. Can also be used to cleanup
9643 existing source by removing extraneous spaces and blank lines.
9644 Found in tools/acpisrc/*
9646 OsdUnMapMemory was renamed to OsdUnmapMemory and then
9647 AcpiOsUnmapMemory. (UnMap became Unmap).
9649 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
9650 When set to one, this indicates that the caller wants to use the
9652 semaphore as a mutex, not a counting semaphore. ACPI CA uses
9653 both types. However, implementers of this call may want to use
9654 different OS primitives depending on the type of semaphore
9655 requested. For example, some operating systems provide separate
9657 "mutex" and "semaphore" interfaces - where the mutex interface is
9658 much faster because it doesn't have all the overhead of a full
9659 semaphore implementation.
9661 Fixed a deadlock problem where a method that accesses the PCI
9662 address space can block forever if it is the first access to the
9665 -------------------------------------------
9666 Summary of changes for this label: 06_02_00
9668 Support for environments that cannot handle unaligned data
9669 accesses (e.g. firmware and OS environments devoid of alignment
9670 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
9671 been added (via configurable macros) in these three areas: -
9672 Transfer of data from the raw AML byte stream is done via byte
9673 moves instead of word/dword/qword moves. - External objects are
9674 aligned within the user buffer, including package elements (sub-
9675 objects). - Conversion of name strings to UINT32 Acpi Names is now
9678 The Store operator was modified to mimic Microsoft's
9679 implementation when storing to a Buffer Field.
9681 Added a check of the BM_STS bit before entering C3.
9683 The methods subdirectory has been obsoleted and removed. A new
9684 file, cmeval.c subsumes the functionality.
9686 A 16-bit (DOS) version of AcpiExec has been developed. The
9687 makefile is under the acpiexec directory.