1 ----------------------------------------
2 12 November 2009. Summary of changes for version 20091112:
4 This release is available at www.acpica.org/downloads
6 1) ACPI CA Core Subsystem:
8 Implemented a post-order callback to AcpiWalkNamespace. The existing
9 interface only has a pre-order callback. This change adds an additional
10 parameter for a post-order callback which will be more useful for bus scans.
11 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
13 Modified the behavior of the operation region memory mapping cache for
14 SystemMemory. Ensure that the memory mappings created for operation regions
15 do not cross 4K page boundaries. Crossing a page boundary while mapping
16 regions can cause kernel warnings on some hosts if the pages have different
17 attributes. Such regions are probably BIOS bugs, and this is the workaround.
18 Linux BZ 14445. Lin Ming.
20 Implemented an automatic repair for predefined methods that must return
21 sorted lists. This change will repair (by sorting) packages returned by _ALR,
22 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
23 and do not contain NULL package elements. Adds one new file,
24 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
26 Fixed a possible fault during predefined name validation if a return Package
27 object contains NULL elements. Also adds a warning if a NULL element is
28 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
29 include repair or removal of all such NULL elements where possible.
31 Implemented additional module-level executable AML code support. This change
32 will execute module-level code that is not at the root of the namespace
33 (under a Device object, etc.) at table load time. Module-level executable AML
34 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
36 Implemented a new internal function to create Integer objects. This function
37 simplifies miscellaneous object creation code. ACPICA BZ 823.
39 Reduced the severity of predefined repair messages, Warning to Info. Since
40 the object was successfully repaired, a warning is too severe. Reduced to an
41 info message for now. These messages may eventually be changed to debug-only.
44 Example Code and Data Size: These are the sizes for the OS-independent
45 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
46 debug version of the code includes the debug output trace mechanism and has a
47 much larger code and data size.
50 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
51 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
53 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
54 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
56 2) iASL Compiler/Disassembler and Tools:
58 iASL: Implemented Switch() with While(1) so that Break works correctly. This
59 change correctly implements the Switch operator with a surrounding While(1)
60 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
62 iASL: Added a message if a package initializer list is shorter than package
63 length. Adds a new remark for a Package() declaration if an initializer list
64 exists, but is shorter than the declared length of the package. Although
65 technically legal, this is probably a coding error and it is seen in the
66 field. ACPICA BZ 815. Lin Ming, Bob Moore.
68 iASL: Fixed a problem where the compiler could fault after the maximum number
69 of errors was reached (200).
71 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
74 ----------------------------------------
75 13 October 2009. Summary of changes for version 20091013:
77 This release is available at www.acpica.org/downloads
79 1) ACPI CA Core Subsystem:
81 Fixed a problem where an Operation Region _REG method could be executed more
82 than once. If a custom address space handler is installed by the host before
83 the "initialize operation regions" phase of the ACPICA initialization, any
84 _REG methods for that address space could be executed twice. This change
85 fixes the problem. ACPICA BZ 427. Lin Ming.
87 Fixed a possible memory leak for the Scope() ASL operator. When the exact
88 invocation of "Scope(\)" is executed (change scope to root), one internal
89 operand object was leaked. Lin Ming.
91 Implemented a run-time repair for the _MAT predefined method. If the _MAT
92 return value is defined as a Field object in the AML, and the field
93 size is less than or equal to the default width of an integer (32 or 64),_MAT
94 can incorrectly return an Integer instead of a Buffer. ACPICA now
95 automatically repairs this problem. ACPICA BZ 810.
97 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
98 "OEM Information" field is often incorrectly returned as an Integer with
99 value zero if the field is not supported by the platform. This is due to an
100 ambiguity in the ACPI specification. The field should always be a string.
101 ACPICA now automatically repairs this problem by returning a NULL string
102 within the returned Package. ACPICA BZ 807.
104 Example Code and Data Size: These are the sizes for the OS-independent
105 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
106 debug version of the code includes the debug output trace mechanism and has a
107 much larger code and data size.
110 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
111 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
113 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
114 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
116 2) iASL Compiler/Disassembler and Tools:
118 Disassembler: Fixed a problem where references to external symbols that
119 contained one or more parent-prefixes (carats) were not handled correctly,
120 possibly causing a fault. ACPICA BZ 806. Lin Ming.
122 Disassembler: Restructured the code so that all functions that handle
123 external symbols are in a single module. One new file is added,
126 AML Debugger: Added a max count argument for the Batch command (which
127 executes multiple predefined methods within the namespace.)
129 iASL: Updated the compiler documentation (User Reference.) Available at
130 http://www.acpica.org/documentation/. ACPICA BZ 750.
132 AcpiXtract: Updated for Lint and other formatting changes. Close all open
135 ----------------------------------------
136 03 September 2009. Summary of changes for version 20090903:
138 1) ACPI CA Core Subsystem:
140 For Windows Vista compatibility, added the automatic execution of an _INI
141 method located at the namespace root (\_INI). This method is executed at
142 table load time. This support is in addition to the automatic execution of
145 Fixed a possible memory leak in the interpreter for AML package objects if
146 the package initializer list is longer than the defined size of the package.
147 This apparently can only happen if the BIOS changes the package size on the
148 fly (seen in a _PSS object), as ASL compilers do not allow this. The
149 interpreter will truncate the package to the defined size (and issue an error
150 message), but previously could leave the extra objects undeleted if they were
151 pre-created during the argument processing (such is the case if the package
152 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
154 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
155 This has been reported in the field. Previously, ACPICA would zero out the
156 buffer/string. Now, the operation is treated as a noop. Provides Windows
157 compatibility. ACPICA BZ 803. Lin Ming.
159 Removed an extraneous error message for ASL constructs of the form
160 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
161 are seen in many BIOSs and are once again treated as NOOPs and no error is
162 emitted when they are encountered. ACPICA BZ 785.
164 Fixed an extraneous warning message if a _DSM reserved method returns a
165 Package object. _DSM can return any type of object, so validation on the
166 return type cannot be performed. ACPICA BZ 802.
168 Example Code and Data Size: These are the sizes for the OS-independent
169 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
170 debug version of the code includes the debug output trace mechanism and has a
171 much larger code and data size.
174 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
175 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
177 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
178 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
180 2) iASL Compiler/Disassembler and Tools:
182 iASL: Fixed a problem with the use of the Alias operator and Resource
183 Templates. The correct alias is now constructed and no error is emitted.
186 iASL: Implemented the -I option to specify additional search directories for
187 include files. Allows multiple additional search paths for include files.
188 Directories are searched in the order specified on the command line (after
189 the local directory is searched.) ACPICA BZ 800.
191 iASL: Fixed a problem where the full pathname for include files was not
192 emitted for warnings/errors. This caused the IDE support to not work
193 properly. ACPICA BZ 765.
195 iASL: Implemented the -@ option to specify a Windows-style response file
196 containing additional command line options. ACPICA BZ 801.
198 AcpiExec: Added support to load multiple AML files simultaneously (such as a
199 DSDT and multiple SSDTs). Also added support for wildcards within the AML
200 pathname. These features allow all machine tables to be easily loaded and
201 debugged together. ACPICA BZ 804.
203 Disassembler: Added missing support for disassembly of HEST table Error Bank
206 ----------------------------------------
207 30 July 2009. Summary of changes for version 20090730:
209 The ACPI 4.0 implementation for ACPICA is complete with this release.
211 1) ACPI CA Core Subsystem:
213 ACPI 4.0: Added header file support for all new and changed ACPI tables.
214 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
215 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
216 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
217 have been some ACPI 4.0 changes to other existing tables. Split the large
218 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
220 ACPI 4.0: Implemented predefined name validation for all new names. There are
221 31 new names in ACPI 4.0. The predefined validation module was split into two
222 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
224 Implemented support for so-called "module-level executable code". This is
225 executable AML code that exists outside of any control method and is intended
226 to be executed at table load time. Although illegal since ACPI 2.0, this type
227 of code still exists and is apparently still being created. Blocks of this
228 code are now detected and executed as intended. Currently, the code blocks
229 must exist under either an If, Else, or While construct; these are the
230 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
232 Implemented an automatic dynamic repair for predefined names that return
233 nested Package objects. This applies to predefined names that are defined to
234 return a variable-length Package of sub-packages. If the number of sub-
235 packages is one, BIOS code is occasionally seen that creates a simple single
236 package with no sub-packages. This code attempts to fix the problem by
237 wrapping a new package object around the existing package. These methods can
238 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
241 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
242 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
245 Fixed a problem with AcpiReset where the reset would silently fail if the
246 register was one of the protected I/O ports. AcpiReset now bypasses the port
247 validation mechanism. This may eventually be driven into the AcpiRead/Write
250 Fixed a regression related to the recent update of the AcpiRead/Write
251 interfaces. A sleep/suspend could fail if the optional PM2 Control register
252 does not exist during an attempt to write the Bus Master Arbitration bit.
253 (However, some hosts already delete the code that writes this bit, and the
254 code may in fact be obsolete at this date.) ACPICA BZ 799.
256 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
257 in succession. ACPICA BZ 795.
259 Example Code and Data Size: These are the sizes for the OS-independent
260 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
261 debug version of the code includes the debug output trace mechanism and has a
262 much larger code and data size.
265 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
266 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
268 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
269 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
271 2) iASL Compiler/Disassembler and Tools:
273 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
274 changes to existing tables. ACPICA BZ 775.
276 ----------------------------------------
277 25 June 2009. Summary of changes for version 20090625:
279 The ACPI 4.0 Specification was released on June 16 and is available at
280 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
281 continue for the next few releases.
283 1) ACPI CA Core Subsystem:
285 ACPI 4.0: Implemented interpreter support for the IPMI operation region
286 address space. Includes support for bi-directional data buffers and an IPMI
287 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
290 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
291 support in both the header files and the disassembler.
293 Completed a major update for the AcpiGetObjectInfo external interface.
295 - Support for variable, unlimited length HID, UID, and CID strings.
296 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
297 - Call the _SxW power methods on behalf of a device object.
298 - Determine if a device is a PCI root bridge.
299 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
300 These changes will require an update to all callers of this interface. See
301 the updated ACPICA Programmer Reference for details. One new source file has
302 been added - utilities/utids.c. ACPICA BZ 368, 780.
304 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
305 transfers. The Value parameter has been extended from 32 bits to 64 bits in
306 order to support new ACPI 4.0 tables. These changes will require an update to
307 all callers of these interfaces. See the ACPICA Programmer Reference for
308 details. ACPICA BZ 768.
310 Fixed several problems with AcpiAttachData. The handler was not invoked when
311 the host node was deleted. The data sub-object was not automatically deleted
312 when the host node was deleted. The interface to the handler had an unused
313 parameter, this was removed. ACPICA BZ 778.
315 Enhanced the function that dumps ACPI table headers. All non-printable
316 characters in the string fields are now replaced with '?' (Signature, OemId,
317 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
318 these fields are occasionally seen in the field. ACPICA BZ 788.
320 Fixed a problem with predefined method repair code where the code that
321 attempts to repair/convert an object of incorrect type is only executed on
322 the first time the predefined method is called. The mechanism that disables
323 warnings on subsequent calls was interfering with the repair mechanism.
326 Fixed a possible memory leak in the predefined validation/repair code when a
327 buffer is automatically converted to an expected string object.
329 Removed obsolete 16-bit files from the distribution and from the current git
330 tree head. ACPICA BZ 776.
332 Example Code and Data Size: These are the sizes for the OS-independent
333 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
334 debug version of the code includes the debug output trace mechanism and has a
335 much larger code and data size.
338 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
339 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
341 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
342 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
344 2) iASL Compiler/Disassembler and Tools:
346 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
347 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
349 ACPI 4.0: iASL - implemented compile-time validation support for all new
350 predefined names and control methods (31 total). ACPICA BZ 769.
352 ----------------------------------------
353 21 May 2009. Summary of changes for version 20090521:
355 1) ACPI CA Core Subsystem:
357 Disabled the preservation of the SCI enable bit in the PM1 control register.
358 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
359 a "preserved" bit - "OSPM always preserves this bit position", section
360 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
361 because the bit needs to be explicitly set by the OS as a workaround. No
362 machines fail if the bit is not preserved. Therefore, ACPICA no longer
363 attempts to preserve this bit.
365 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
366 incorrectly formed _PRT package could cause a fault. Added validation to
367 ensure that each package element is actually a sub-package.
369 Implemented a new interface to install or override a single control method,
370 AcpiInstallMethod. This interface is useful when debugging in order to repair
371 an existing method or to install a missing method without having to override
372 the entire ACPI table. See the ACPICA Programmer Reference for use and
373 examples. Lin Ming, Bob Moore.
375 Fixed several reference count issues with the DdbHandle object that is
376 created from a Load or LoadTable operator. Prevent premature deletion of the
377 object. Also, mark the object as invalid once the table has been unloaded.
378 This is needed because the handle itself may not be deleted after the table
379 unload, depending on whether it has been stored in a named object by the
382 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
383 mutexes of the same sync level are acquired but then not released in strict
384 opposite order, the internally maintained Current Sync Level becomes confused
385 and can cause subsequent execution errors. ACPICA BZ 471.
387 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
388 specification has been changed to make the SyncLevel for mutex objects more
389 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
390 same as the current sync level. This makes more sense than the previous rule
391 (SyncLevel less than or equal). This change updates the code to match the
394 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
395 (local) cache must be locked during all cache object deletions. Andrew
398 Updated the Load operator to use operation region interfaces. This replaces
399 direct memory mapping with region access calls. Now, all region accesses go
400 through the installed region handler as they should.
402 Simplified and optimized the NsGetNextNode function. Reduced parameter count
403 and reduced code for this frequently used function.
405 Example Code and Data Size: These are the sizes for the OS-independent
406 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
407 debug version of the code includes the debug output trace mechanism and has a
408 much larger code and data size.
411 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
412 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
414 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
415 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
417 2) iASL Compiler/Disassembler and Tools:
419 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
420 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
421 after an invalid sub-table ID.
423 ----------------------------------------
424 22 April 2009. Summary of changes for version 20090422:
426 1) ACPI CA Core Subsystem:
428 Fixed a compatibility issue with the recently released I/O port protection
429 mechanism. For windows compatibility, 1) On a port protection violation,
430 simply ignore the request and do not return an exception (allow the control
431 method to continue execution.) 2) If only part of the request overlaps a
432 protected port, read/write the individual ports that are not protected. Linux
435 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
436 breaks into the AML debugger if the debugger is present. This matches the
437 ACPI-defined behavior.
439 Fixed several possible warnings related to the use of the configurable
440 ACPI_THREAD_ID. This type can now be configured as either an integer or a
441 pointer with no warnings. Also fixes several warnings in printf-like
442 statements for the 64-bit build when the type is configured as a pointer.
445 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
446 warning options.) Examples include printf formats, aliasing, unused globals,
447 missing prototypes, missing switch default statements, use of non-ANSI
448 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
449 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
451 Example Code and Data Size: These are the sizes for the OS-independent
452 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
453 debug version of the code includes the debug output trace mechanism and has a
454 much larger code and data size.
457 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
458 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
460 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
461 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
463 2) iASL Compiler/Disassembler and Tools:
465 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
468 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
469 correctly digest Windows/DOS formatted files (with CR/LF).
471 iASL: Added a new option for "quiet mode" (-va) that produces only the
472 compilation summary, not individual errors and warnings. Useful for large
475 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
476 timeout that can be used to detect hang conditions during execution of AML
477 code (includes both internal semaphores and AML-defined mutexes and events.)
479 Added new makefiles for the generation of acpica in a generic unix-like
480 environment. These makefiles are intended to generate the acpica tools and
481 utilities from the original acpica git source tree structure.
483 Test Suites: Updated and cleaned up the documentation files. Updated the
484 copyrights to 2009, affecting all source files. Use the new version of iASL
485 with quiet mode. Increased the number of available semaphores in the Windows
486 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
487 an alternate implementation of the semaphore timeout to allow aslts to
488 execute fully on Cygwin.
490 ----------------------------------------
491 20 March 2009. Summary of changes for version 20090320:
493 1) ACPI CA Core Subsystem:
495 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
496 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
497 namespace walks (readers), but block a dynamic table unload until it can gain
498 exclusive write access to the namespace. This fixes a problem where a table
499 unload could (possibly catastrophically) delete the portion of the namespace
500 that is currently being examined by a walk. Adds a new file, utlock.c, that
501 implements the reader/writer lock mechanism. ACPICA BZ 749.
503 Fixed a regression introduced in version 20090220 where a change to the FADT
504 handling could cause the ACPICA subsystem to access non-existent I/O ports.
506 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
507 FADT can contain both 32-bit and 64-bit versions of these addresses.
508 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
509 versions were valid, but not equal, the 64-bit version was used. This was
510 found to cause some machines to fail. Now, in this case, the 32-bit version
511 is used instead. This now matches the Windows behavior.
513 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
514 compatibility and protects the standard PC I/O ports from access via AML
515 code. Adds a new file, hwvalid.c
517 Fixed a possible extraneous warning message from the FADT support. The
518 message warns of a 32/64 length mismatch between the legacy and GAS
519 definitions for a register.
521 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
522 made obsolete by the port protection mechanism above. It was previously used
523 to validate the entire address range of an operation region, which could be
524 incorrect if the range included illegal ports, but fields within the
525 operation region did not actually access those ports. Validation is now
526 performed on a per-field basis instead of the entire region.
528 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
529 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
530 means a read/modify/write when writing to the register. However, for status
531 registers, writing a one means clear the event. Writing a zero means preserve
532 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
533 and the ACPICA code now simply always writes a zero to the ignored bit.
535 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
536 per the ACPI specification, for the control registers, preserve
537 (read/modify/write) all bits that are defined as either reserved or ignored.
539 Updated the handling of write-only bits in the PM1 A/B Control Registers.
540 When reading the register, zero the write-only bits as per the ACPI spec.
541 ACPICA BZ 443. Lin Ming.
543 Removed "Linux" from the list of supported _OSI strings. Linux no longer
544 wants to reply true to this request. The Windows strings are the only paths
545 through the AML that are tested and known to work properly.
548 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
549 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
551 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
552 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
554 2) iASL Compiler/Disassembler and Tools:
556 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
559 ----------------------------------------
560 20 February 2009. Summary of changes for version 20090220:
562 1) ACPI CA Core Subsystem:
564 Optimized the ACPI register locking. Removed locking for reads from the ACPI
565 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
566 not required when reading the single-bit registers. The
567 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
568 This will improve performance for reads on these registers. ACPICA BZ 760.
570 Fixed the parameter validation for AcpiRead/Write. Now return
571 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
572 the register has an address of zero. Previously, these cases simply returned
573 AE_OK. For optional registers such as PM1B status/enable/control, the caller
574 should check for a valid register address before calling. ACPICA BZ 748.
576 Renamed the external ACPI bit register access functions. Renamed
577 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
578 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
579 Also, restructured the code for these functions by simplifying the code path
580 and condensing duplicate code to reduce code size.
582 Added new functions to transparently handle the possibly split PM1 A/B
583 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
584 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
587 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
588 This function writes both of the PM1 control registers (A/B). These registers
589 are different than the PM1 A/B status and enable registers in that different
590 values can be written to the A/B registers. Most notably, the SLP_TYP bits
591 can be different, as per the values returned from the _Sx predefined methods.
593 Removed an extra register write within AcpiHwClearAcpiStatus. This function
594 was writing an optional PM1B status register twice. The existing call to the
595 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
596 register. ACPICA BZ 751.
598 Split out the PM1 Status registers from the FADT. Added new globals for these
599 registers (A/B), similar to the way the PM1 Enable registers are handled.
600 Instead of overloading the FADT Event Register blocks. This makes the code
601 clearer and less prone to error.
603 Fixed the warning message for when the platform contains too many ACPI tables
604 for the default size of the global root table data structure. The calculation
605 for the truncation value was incorrect.
607 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
608 obsolete macro, since it is now a simple reference to ->common.type. There
609 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
611 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
612 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
613 simply SLEEP_TYPE. ACPICA BZ 754.
615 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
616 function is only needed on 64-bit host operating systems and is thus not
617 included for 32-bit hosts.
619 Debug output: print the input and result for invocations of the _OSI reserved
620 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
621 verbosity of this debug level. Len Brown.
623 Example Code and Data Size: These are the sizes for the OS-independent
624 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
625 debug version of the code includes the debug output trace mechanism and has a
626 much larger code and data size.
629 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
630 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
632 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
633 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
635 2) iASL Compiler/Disassembler and Tools:
637 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
638 various legal performance profiles.
640 ----------------------------------------
641 23 January 2009. Summary of changes for version 20090123:
643 1) ACPI CA Core Subsystem:
645 Added the 2009 copyright to all module headers and signons. This affects
646 virtually every file in the ACPICA core subsystem, the iASL compiler, and
649 Implemented a change to allow the host to override any ACPI table, including
650 dynamically loaded tables. Previously, only the DSDT could be replaced by the
651 host. With this change, the AcpiOsTableOverride interface is called for each
652 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
653 a table is dynamically loaded via the AML Load operator.
655 Updated FADT flag definitions, especially the Boot Architecture flags.
657 Debugger: For the Find command, automatically pad the input ACPI name with
658 underscores if the name is shorter than 4 characters. This enables a match
659 with the actual namespace entry which is itself padded with underscores.
661 Example Code and Data Size: These are the sizes for the OS-independent
662 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
663 debug version of the code includes the debug output trace mechanism and has a
664 much larger code and data size.
667 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
668 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
670 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
671 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
673 2) iASL Compiler/Disassembler and Tools:
675 Fix build error under Bison-2.4.
677 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
678 flags. Now decode all flags, regardless of the FADT version. Flag output
679 includes the FADT version which first defined each flag.
681 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
684 ----------------------------------------
685 04 December 2008. Summary of changes for version 20081204:
687 1) ACPI CA Core Subsystem:
689 The ACPICA Programmer Reference has been completely updated and revamped for
690 this release. This includes updates to the external interfaces, OSL
691 interfaces, the overview sections, and the debugger reference.
693 Several new ACPICA interfaces have been implemented and documented in the
694 programmer reference:
695 AcpiReset - Writes the reset value to the FADT-defined reset register.
696 AcpiDisableAllGpes - Disable all available GPEs.
697 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
698 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
699 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
700 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
701 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
703 Most of the public ACPI hardware-related interfaces have been moved to a new
704 file, components/hardware/hwxface.c
706 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
707 register lengths within the FADT are now used, and the low level ACPI
708 register access no longer hardcodes the ACPI register lengths. Given that
709 there may be some risk in actually trusting the FADT register lengths, a run-
710 time option was added to fall back to the default hardcoded lengths if the
711 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
712 option is set to true for now, and a warning is issued if a suspicious FADT
713 register length is overridden with the default value.
715 Fixed a reference count issue in NsRepairObject. This problem was introduced
716 in version 20081031 as part of a fix to repair Buffer objects within
719 Added semaphore support to the Linux/Unix application OS-services layer
720 (OSL). ACPICA BZ 448. Lin Ming.
722 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
723 be implemented in the OSL, or will binary semaphores be used instead.
725 Example Code and Data Size: These are the sizes for the OS-independent
726 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
727 debug version of the code includes the debug output trace mechanism and has a
728 much larger code and data size.
731 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
732 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
734 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
735 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
737 2) iASL Compiler/Disassembler and Tools:
739 iASL: Completed the '-e' option to include additional ACPI tables in order to
740 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
743 iASL: Removed the "named object in while loop" error. The compiler cannot
744 determine how many times a loop will execute. ACPICA BZ 730.
746 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
749 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
751 ----------------------------------------
752 31 October 2008. Summary of changes for version 20081031:
754 1) ACPI CA Core Subsystem:
756 Restructured the ACPICA header files into public/private. acpi.h now includes
757 only the "public" acpica headers. All other acpica headers are "private" and
758 should not be included by acpica users. One new file, accommon.h is used to
759 include the commonly used private headers for acpica code generation. Future
760 plans include moving all private headers to a new subdirectory.
762 Implemented an automatic Buffer->String return value conversion for
763 predefined ACPI methods. For these methods (such as _BIF), added automatic
764 conversion for return objects that are required to be a String, but a Buffer
765 was found instead. This can happen when reading string battery data from an
766 operation region, because it used to be difficult to convert the data from
767 buffer to string from within the ASL. Ensures that the host OS is provided
768 with a valid null-terminated string. Linux BZ 11822.
770 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
771 into two: one for the 32-bit vector, another for the 64-bit vector. This is
772 required because the host OS must setup the wake much differently for each
773 vector (real vs. protected mode, etc.) and the interface itself should not be
774 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
775 interface, as it served no purpose (only the firmware reads the vector, OS
776 only writes the vector.) ACPICA BZ 731.
778 Implemented a mechanism to escape infinite AML While() loops. Added a loop
779 counter to force exit from AML While loops if the count becomes too large.
780 This can occur in poorly written AML when the hardware does not respond
781 within a while loop and the loop does not implement a timeout. The maximum
782 loop count is configurable. A new exception code is returned when a loop is
783 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
785 Optimized the execution of AML While loops. Previously, a control state
786 object was allocated and freed for each execution of the loop. The
787 optimization is to simply reuse the control state for each iteration. This
788 speeds up the raw loop execution time by about 5%.
790 Enhanced the implicit return mechanism. For Windows compatibility, return an
791 implicit integer of value zero for methods that contain no executable code.
792 Such methods are seen in the field as stubs (presumably), and can cause
793 drivers to fail if they expect a return value. Lin Ming.
795 Allow multiple backslashes as root prefixes in namepaths. In a fully
796 qualified namepath, allow multiple backslash prefixes. This can happen (and
797 is seen in the field) because of the use of a double-backslash in strings
798 (since backslash is the escape character) causing confusion. ACPICA BZ 739
801 Emit a warning if two different FACS or DSDT tables are discovered in the
802 FADT. Checks if there are two valid but different addresses for the FACS and
803 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
805 Consolidated the method argument count validation code. Merged the code that
806 validates control method argument counts into the predefined validation
807 module. Eliminates possible multiple warnings for incorrect argument counts.
809 Implemented ACPICA example code. Includes code for ACPICA initialization,
810 handler installation, and calling a control method. Available at
811 source/tools/examples.
813 Added a global pointer for FACS table to simplify internal FACS access. Use
814 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
815 This simplifies the code for the Global Lock and the Firmware Waking
818 Example Code and Data Size: These are the sizes for the OS-independent
819 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
820 debug version of the code includes the debug output trace mechanism and has a
821 much larger code and data size.
824 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
825 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
827 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
828 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
830 2) iASL Compiler/Disassembler and Tools:
832 iASL: Improved disassembly of external method calls. Added the -e option to
833 allow the inclusion of additional ACPI tables to help with the disassembly of
834 method invocations and the generation of external declarations during the
835 disassembly. Certain external method invocations cannot be disassembled
836 properly without the actual declaration of the method. Use the -e option to
837 include the table where the external method(s) are actually declared. Most
838 useful for disassembling SSDTs that make method calls back to the master
839 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
840 -e dsdt.aml ssdt1.aml
842 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
843 problem where the use of an alias within a namepath would result in a not
844 found error or cause the compiler to fault. Also now allows forward
845 references from the Alias operator itself. ACPICA BZ 738.
847 ----------------------------------------
848 26 September 2008. Summary of changes for version 20080926:
850 1) ACPI CA Core Subsystem:
852 Designed and implemented a mechanism to validate predefined ACPI methods and
853 objects. This code validates the predefined ACPI objects (objects whose names
854 start with underscore) that appear in the namespace, at the time they are
855 evaluated. The argument count and the type of the returned object are
856 validated against the ACPI specification. The purpose of this validation is
857 to detect problems with the BIOS-implemented predefined ACPI objects before
858 the results are returned to the ACPI-related drivers. Future enhancements may
859 include actual repair of incorrect return objects where possible. Two new
860 files are nspredef.c and acpredef.h.
862 Fixed a fault in the AML parser if a memory allocation fails during the Op
863 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
865 Fixed an issue with implicit return compatibility. This change improves the
866 implicit return mechanism to be more compatible with the MS interpreter. Lin
869 Implemented support for zero-length buffer-to-string conversions. Allow zero
870 length strings during interpreter buffer-to-string conversions. For example,
871 during the ToDecimalString and ToHexString operators, as well as implicit
872 conversions. Fiodor Suietov, ACPICA BZ 585.
874 Fixed two possible memory leaks in the error exit paths of
875 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
876 similar in that they use a stack of state objects in order to eliminate
877 recursion. The stack must be fully unwound and deallocated if an error
878 occurs. Lin Ming. ACPICA BZ 383.
880 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
881 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
884 Removed the obsolete version number in module headers. Removed the
885 "$Revision" number that appeared in each module header. This version number
886 was useful under SourceSafe and CVS, but has no meaning under git. It is not
887 only incorrect, it could also be misleading.
889 Example Code and Data Size: These are the sizes for the OS-independent
890 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
891 debug version of the code includes the debug output trace mechanism and has a
892 much larger code and data size.
895 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
896 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
898 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
899 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
901 ----------------------------------------
902 29 August 2008. Summary of changes for version 20080829:
904 1) ACPI CA Core Subsystem:
906 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
907 Reference. Changes include the elimination of cheating on the Object field
908 for the DdbHandle subtype, addition of a reference class field to
909 differentiate the various reference types (instead of an AML opcode), and the
910 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
912 Reduce an error to a warning for an incorrect method argument count.
913 Previously aborted with an error if too few arguments were passed to a
914 control method via the external ACPICA interface. Now issue a warning instead
915 and continue. Handles the case where the method inadvertently declares too
916 many arguments, but does not actually use the extra ones. Applies mainly to
917 the predefined methods. Lin Ming. Linux BZ 11032.
919 Disallow the evaluation of named object types with no intrinsic value. Return
920 AE_TYPE for objects that have no value and therefore evaluation is undefined:
921 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
922 these types were allowed, but an exception would be generated at some point
923 during the evaluation. Now, the error is generated up front.
925 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
926 (nsnames.c). Fixes a leak in the error exit path.
928 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
929 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
930 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
933 Removed obsolete and/or unused exception codes from the acexcep.h header.
934 There is the possibility that certain device drivers may be affected if they
935 use any of these exceptions.
937 The ACPICA documentation has been added to the public git source tree, under
938 acpica/documents. Included are the ACPICA programmer reference, the iASL
939 compiler reference, and the changes.txt release logfile.
941 Example Code and Data Size: These are the sizes for the OS-independent
942 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
943 debug version of the code includes the debug output trace mechanism and has a
944 much larger code and data size.
947 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
948 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
950 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
951 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
953 2) iASL Compiler/Disassembler and Tools:
955 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
956 defines _SCP with 3 arguments. Previous versions defined it with only 1
957 argument. iASL now allows both definitions.
959 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
960 length subtables when disassembling ACPI tables. Also fixed a couple of
961 errors where a full 16-bit table type field was not extracted from the input
964 acpisrc: Improve comment counting mechanism for generating source code
965 statistics. Count first and last lines of multi-line comments as whitespace,
966 not comment lines. Handle Linux legal header in addition to standard acpica
969 ----------------------------------------
971 29 July 2008. Summary of changes for version 20080729:
973 This release is available at http://acpica.org/downloads
974 Direct git access via http://www.acpica.org/repos/acpica.git
976 1) ACPI CA Core Subsystem:
978 Fix a possible deadlock in the GPE dispatch. Remove call to
979 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
980 to acquire the GPE lock but can deadlock since the GPE lock is already held
981 at dispatch time. This code was introduced in version 20060831 as a response
982 to Linux BZ 6881 and has since been removed from Linux.
984 Add a function to dereference returned reference objects. Examines the return
985 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
986 automatically dereferenced in an attempt to return something useful (these
987 reference types cannot be converted into an external ACPI_OBJECT.) Provides
988 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
990 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
991 subtables for the MADT and one new subtable for the SRAT. Includes
992 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
993 Specification, June 2008.
995 Additional error checking for pathname utilities. Add error check after all
996 calls to AcpiNsGetPathnameLength. Add status return from
997 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
998 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
1000 Return status from the global init function AcpiUtGlobalInitialize. This is
1001 used by both the kernel subsystem and the utilities such as iASL compiler.
1002 The function could possibly fail when the caches are initialized. Yang Yi.
1004 Add a function to decode reference object types to strings. Created for
1005 improved error messages.
1007 Improve object conversion error messages. Better error messages during object
1008 conversion from internal to the external ACPI_OBJECT. Used for external calls
1009 to AcpiEvaluateObject.
1011 Example Code and Data Size: These are the sizes for the OS-independent
1012 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1013 debug version of the code includes the debug output trace mechanism and has a
1014 much larger code and data size.
1017 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1018 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1020 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1021 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1023 2) iASL Compiler/Disassembler and Tools:
1025 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
1026 introduced in version 20080701. If the object being evaluated (via execute
1027 command) is not a method, the debugger can hang while trying to obtain non-
1028 existent parameters.
1030 iASL: relax error for using reserved "_T_x" identifiers. These names can
1031 appear in a disassembled ASL file if they were emitted by the original
1032 compiler. Instead of issuing an error or warning and forcing the user to
1033 manually change these names, issue a remark instead.
1035 iASL: error if named object created in while loop. Emit an error if any named
1036 object is created within a While loop. If allowed, this code will generate a
1037 run-time error on the second iteration of the loop when an attempt is made to
1038 create the same named object twice. ACPICA bugzilla 730.
1040 iASL: Support absolute pathnames for include files. Add support for absolute
1041 pathnames within the Include operator. previously, only relative pathnames
1044 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
1045 The ACPI spec requires one interrupt minimum. BZ 423
1047 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
1048 Handles the case for the Interrupt Resource Descriptor where
1049 the ResourceSource argument is omitted but ResourceSourceIndex
1050 is present. Now leave room for the Index. BZ 426
1052 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
1053 where an error message is emitted if the target does not exist. BZ 516
1055 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
1056 (get ACPI tables on Windows). This was apparently broken in version 20070919.
1058 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
1059 the EOF happens immediately after the last table in the input file. Print
1060 completion message. Previously, no message was displayed in this case.
1062 ----------------------------------------
1063 01 July 2008. Summary of changes for version 20080701:
1065 This release is available at http://acpica.org/downloads
1066 Direct git access via http://www.acpica.org/repos/acpica.git
1068 0) Git source tree / acpica.org
1070 Fixed a problem where a git-clone from http would not transfer the entire
1073 1) ACPI CA Core Subsystem:
1075 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
1076 enable bit. Now performs a read-change-write of the enable register instead
1077 of simply writing out the cached enable mask. This will prevent inadvertent
1078 enabling of GPEs if a rogue GPE is received during initialization (before GPE
1079 handlers are installed.)
1081 Implemented a copy for dynamically loaded tables. Previously, dynamically
1082 loaded tables were simply mapped - but on some machines this memory is
1083 corrupted after suspend. Now copy the table to a local buffer. For the
1084 OpRegion case, added checksum verify. Use the table length from the table
1085 header, not the region length. For the Buffer case, use the table length
1086 also. Dennis Noordsij, Bob Moore. BZ 10734
1088 Fixed a problem where the same ACPI table could not be dynamically loaded and
1089 unloaded more than once. Without this change, a table cannot be loaded again
1090 once it has been loaded/unloaded one time. The current mechanism does not
1091 unregister a table upon an unload. During a load, if the same table is found,
1092 this no longer returns an exception. BZ 722
1094 Fixed a problem where the wrong descriptor length was calculated for the
1095 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
1096 are calculated as 12 bytes long, but the actual length in the internal
1097 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
1098 by Linn Crosetto. BZ 728
1100 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
1101 by Load() did not have its reference count decremented during unload, leading
1102 to a memory leak. Lin Ming. BZ 727
1104 Fixed a possible memory leak when deleting thermal/processor objects. Any
1105 associated notify handlers (and objects) were not being deleted. Fiodor
1108 Fixed the ordering of the ASCII names in the global mutex table to match the
1109 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
1110 Vegard Nossum. BZ 726
1112 Enhanced the AcpiGetObjectInfo interface to return the number of required
1113 arguments if the object is a control method. Added this call to the debugger
1114 so the proper number of default arguments are passed to a method. This
1115 prevents a warning when executing methods from AcpiExec.
1117 Added a check for an invalid handle in AcpiGetObjectInfo. Return
1118 AE_BAD_PARAMETER if input handle is invalid. BZ 474
1120 Fixed an extraneous warning from exconfig.c on the 64-bit build.
1122 Example Code and Data Size: These are the sizes for the OS-independent
1123 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1124 debug version of the code includes the debug output trace mechanism and has a
1125 much larger code and data size.
1128 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1129 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1131 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1132 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1134 2) iASL Compiler/Disassembler and Tools:
1136 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
1137 resource descriptor names.
1139 iASL: Detect invalid ASCII characters in input (windows version). Removed the
1140 "-CF" flag from the flex compile, enables correct detection of non-ASCII
1141 characters in the input. BZ 441
1143 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
1144 "result of operation not used" warning when the DDB handle returned from
1145 LoadTable is not used. The warning is not needed. BZ 590
1147 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
1148 pass address of table to the AML. Added option to disable OpRegion simulation
1149 to allow creation of an OpRegion with a real address that was passed to _CFG.
1150 All of this allows testing of the Load and Unload operators from AcpiExec.
1152 Debugger: update tables command for unloaded tables. Handle unloaded tables
1153 and use the standard table header output routine.
1155 ----------------------------------------
1156 09 June 2008. Summary of changes for version 20080609:
1158 1) ACPI CA Core Subsystem:
1160 Implemented a workaround for reversed _PRT entries. A significant number of
1161 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
1162 change dynamically detects and repairs this problem. Provides compatibility
1163 with MS ACPI. BZ 6859
1165 Simplified the internal ACPI hardware interfaces to eliminate the locking
1166 flag parameter from Register Read/Write. Added a new external interface,
1167 AcpiGetRegisterUnlocked.
1169 Fixed a problem where the invocation of a GPE control method could hang. This
1170 was a regression introduced in 20080514. The new method argument count
1171 validation mechanism can enter an infinite loop when a GPE method is
1172 dispatched. Problem fixed by removing the obsolete code that passed GPE block
1173 information to the notify handler via the control method parameter pointer.
1175 Fixed a problem where the _SST execution status was incorrectly returned to
1176 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
1177 20080514. _SST is optional and a NOT_FOUND exception should never be
1180 Fixed a problem where a deleted object could be accessed from within the AML
1181 parser. This was a regression introduced in version 20080123 as a fix for the
1182 Unload operator. Lin Ming. BZ 10669
1184 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
1185 and eliminated the use of a negative index in a loop. Operands are now
1186 displayed in the correct order, not backwards. This also fixes a regression
1187 introduced in 20080514 on 64-bit systems where the elimination of
1188 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
1190 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
1191 path did not delete a locally allocated structure.
1193 Updated definitions for the DMAR and SRAT tables to synchronize with the
1194 current specifications. Includes disassembler support.
1196 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
1197 loop termination value was used. Loop terminated on iteration early, missing
1198 one mutex. Linn Crosetto
1200 Example Code and Data Size: These are the sizes for the OS-independent
1201 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1202 debug version of the code includes the debug output trace mechanism and has a
1203 much larger code and data size.
1206 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1207 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1209 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1210 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1212 2) iASL Compiler/Disassembler and Tools:
1214 Disassembler: Implemented support for EisaId() within _CID objects. Now
1215 disassemble integer _CID objects back to EisaId invocations, including
1216 multiple integers within _CID packages. Includes single-step support for
1219 Disassembler: Added support for DMAR and SRAT table definition changes.
1221 ----------------------------------------
1222 14 May 2008. Summary of changes for version 20080514:
1224 1) ACPI CA Core Subsystem:
1226 Fixed a problem where GPEs were enabled too early during the ACPICA
1227 initialization. This could lead to "handler not installed" errors on some
1228 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
1229 ensures that all operation regions and devices throughout the namespace have
1230 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
1232 Implemented a change to the enter sleep code. Moved execution of the _GTS
1233 method to just before setting sleep enable bit. The execution was moved from
1234 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
1235 immediately before the SLP_EN bit is set, as per the ACPI specification.
1238 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
1239 the GPE, even if ACPICA thinks that that it is already disabled. It is
1240 possible that the AML or some other code has enabled the GPE unbeknownst to
1243 Fixed a problem with the Field operator where zero-length fields would return
1244 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
1245 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
1247 Implemented a fix for the Load operator, now load the table at the namespace
1248 root. This reverts a change introduced in version 20071019. The table is now
1249 loaded at the namespace root even though this goes against the ACPI
1250 specification. This provides compatibility with other ACPI implementations.
1251 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
1253 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
1254 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
1255 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
1256 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
1257 signatures, ACPICA must be compatible. BZ 10454.
1259 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
1260 fields to the exception string arrays to eliminate a -1 subtraction on the
1263 Updated the debug tracking macros to reduce overall code and data size.
1264 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
1265 instead of pointers to static strings. Jan Beulich and Bob Moore.
1267 Implemented argument count checking in control method invocation via
1268 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
1269 many. This applies only to extern programmatic control method execution, not
1270 method-to-method calls within the AML. Lin Ming.
1272 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
1273 longer needed, especially with the removal of 16-bit support. It was replaced
1274 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
1275 32/64-bit platforms is required.
1277 Added the C const qualifier for appropriate string constants -- mostly
1278 MODULE_NAME and printf format strings. Jan Beulich.
1280 Example Code and Data Size: These are the sizes for the OS-independent
1281 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1282 debug version of the code includes the debug output trace mechanism and has a
1283 much larger code and data size.
1286 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1287 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1289 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1290 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1292 2) iASL Compiler/Disassembler and Tools:
1294 Implemented ACPI table revision ID validation in the disassembler. Zero is
1295 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
1296 means 32-bit and this is unusual. 2 or greater is 64-bit.
1298 ----------------------------------------
1299 21 March 2008. Summary of changes for version 20080321:
1301 1) ACPI CA Core Subsystem:
1303 Implemented an additional change to the GPE support in order to suppress
1304 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
1305 disable incoming GPEs that are neither enabled nor disabled -- meaning that
1306 the GPE is unknown to the system. This should prevent future interrupt floods
1307 from that GPE. BZ 6217 (Zhang Rui)
1309 Fixed a problem where NULL package elements were not returned to the
1310 AcpiEvaluateObject interface correctly. The element was simply ignored
1311 instead of returning a NULL ACPI_OBJECT package element, potentially causing
1312 a buffer overflow and/or confusing the caller who expected a fixed number of
1313 elements. BZ 10132 (Lin Ming, Bob Moore)
1315 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
1316 Qword), Field, BankField, and IndexField operators when invoked from inside
1317 an executing control method. In this case, these operators created namespace
1318 nodes that were incorrectly left marked as permanent nodes instead of
1319 temporary nodes. This could cause a problem if there is race condition
1320 between an exiting control method and a running namespace walk. (Reported by
1323 Fixed a problem where the CreateField and CreateXXXField operators would
1324 incorrectly allow duplicate names (the name of the field) with no exception
1327 Implemented several changes for Notify handling. Added support for new Notify
1328 values (ACPI 2.0+) and improved the Notify debug output. Notify on
1329 PowerResource objects is no longer allowed, as per the ACPI specification.
1330 (Bob Moore, Zhang Rui)
1332 All Reference Objects returned via the AcpiEvaluateObject interface are now
1333 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
1334 NULL objects - either NULL package elements or unresolved named references.
1336 Fixed a problem where an extraneous debug message was produced for package
1337 objects (when debugging enabled). The message "Package List length larger
1338 than NumElements count" is now produced in the correct case, and is now an
1339 error message rather than a debug message. Added a debug message for the
1340 opposite case, where NumElements is larger than the Package List (the package
1341 will be padded out with NULL elements as per the ACPI spec.)
1343 Implemented several improvements for the output of the ASL "Debug" object to
1344 clarify and keep all data for a given object on one output line.
1346 Fixed two size calculation issues with the variable-length Start Dependent
1347 resource descriptor.
1349 Example Code and Data Size: These are the sizes for the OS-independent
1350 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1351 debug version of the code includes the debug output trace mechanism and has
1352 a much larger code and data size.
1355 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1356 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1358 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1359 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1361 2) iASL Compiler/Disassembler and Tools:
1363 Fixed a problem with the use of the Switch operator where execution of the
1364 containing method by multiple concurrent threads could cause an
1365 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
1366 actual Switch opcode, it must be simulated with local named temporary
1367 variables and if/else pairs. The solution chosen was to mark any method that
1368 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
1370 ----------------------------------------
1371 13 February 2008. Summary of changes for version 20080213:
1373 1) ACPI CA Core Subsystem:
1375 Implemented another MS compatibility design change for GPE/Notify handling.
1376 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
1377 complete first. It is expected that the OSL will queue the enable request
1378 behind all pending notify requests (may require changes to the local host OSL
1379 in AcpiOsExecute). Alexey Starikovskiy.
1381 Fixed a problem where buffer and package objects passed as arguments to a
1382 control method via the external AcpiEvaluateObject interface could cause an
1383 AE_AML_INTERNAL exception depending on the order and type of operators
1384 executed by the target control method.
1386 Fixed a problem where resource descriptor size optimization could cause a
1387 problem when a _CRS resource template is passed to a _SRS method. The _SRS
1388 resource template must use the same descriptors (with the same size) as
1389 returned from _CRS. This change affects the following resource descriptors:
1390 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
1392 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
1393 objects did not perform an implicit conversion as it should. These types must
1394 retain their initial type permanently as per the ACPI specification. However,
1395 a CopyObject to all other object types should not perform an implicit
1396 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
1398 Fixed a problem with the AcpiGetDevices interface where the mechanism to
1399 match device CIDs did not examine the entire list of available CIDs, but
1400 instead aborted on the first non-matching CID. Andrew Patterson.
1402 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
1403 inadvertently changed to return a 16-bit value instead of a 32-bit value,
1404 truncating the upper dword of a 64-bit value. This macro is only used to
1405 display debug output, so no incorrect calculations were made. Also,
1406 reimplemented the macro so that a 64-bit shift is not performed by
1407 inefficient compilers.
1409 Added missing va_end statements that should correspond with each va_start
1412 Example Code and Data Size: These are the sizes for the OS-independent
1413 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1414 debug version of the code includes the debug output trace mechanism and has
1415 a much larger code and data size.
1418 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1419 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1421 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1422 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1424 2) iASL Compiler/Disassembler and Tools:
1426 Implemented full disassembler support for the following new ACPI tables:
1427 BERT, EINJ, and ERST. Implemented partial disassembler support for the
1428 complicated HEST table. These tables support the Windows Hardware Error
1429 Architecture (WHEA).
1431 ----------------------------------------
1432 23 January 2008. Summary of changes for version 20080123:
1434 1) ACPI CA Core Subsystem:
1436 Added the 2008 copyright to all module headers and signons. This affects
1437 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1438 the tools/utilities.
1440 Fixed a problem with the SizeOf operator when used with Package and Buffer
1441 objects. These objects have deferred execution for some arguments, and the
1442 execution is now completed before the SizeOf is executed. This problem caused
1443 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
1446 Implemented an enhancement to the interpreter "slack mode". In the absence of
1447 an explicit return or an implicitly returned object from the last executed
1448 opcode, a control method will now implicitly return an integer of value 0 for
1449 Microsoft compatibility. (Lin Ming) BZ 392
1451 Fixed a problem with the Load operator where an exception was not returned in
1452 the case where the table is already loaded. (Lin Ming) BZ 463
1454 Implemented support for the use of DDBHandles as an Indexed Reference, as per
1455 the ACPI spec. (Lin Ming) BZ 486
1457 Implemented support for UserTerm (Method invocation) for the Unload operator
1458 as per the ACPI spec. (Lin Ming) BZ 580
1460 Fixed a problem with the LoadTable operator where the OemId and OemTableId
1461 input strings could cause unexpected failures if they were shorter than the
1462 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
1464 Implemented support for UserTerm (Method invocation) for the Unload operator
1465 as per the ACPI spec. (Lin Ming) BZ 580
1467 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
1468 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
1470 Example Code and Data Size: These are the sizes for the OS-independent
1471 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1472 debug version of the code includes the debug output trace mechanism and has
1473 a much larger code and data size.
1476 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1477 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1479 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1480 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1482 2) iASL Compiler/Disassembler and Tools:
1484 Implemented support in the disassembler for checksum validation on incoming
1485 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
1486 header dump at the start of the disassembly.
1488 Implemented additional debugging information in the namespace listing file
1489 created during compilation. In addition to the namespace hierarchy, the full
1490 pathname to each namespace object is displayed.
1492 Fixed a problem with the disassembler where invalid ACPI tables could cause
1493 faults or infinite loops.
1495 Fixed an unexpected parse error when using the optional "parameter types"
1496 list in a control method declaration. (Lin Ming) BZ 397
1498 Fixed a problem where two External declarations with the same name did not
1499 cause an error (Lin Ming) BZ 509
1501 Implemented support for full TermArgs (adding Argx, Localx and method
1502 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
1505 ----------------------------------------
1506 19 December 2007. Summary of changes for version 20071219:
1508 1) ACPI CA Core Subsystem:
1510 Implemented full support for deferred execution for the TermArg string
1511 arguments for DataTableRegion. This enables forward references and full
1512 operand resolution for the three string arguments. Similar to OperationRegion
1513 deferred argument execution.) Lin Ming. BZ 430
1515 Implemented full argument resolution support for the BankValue argument to
1516 BankField. Previously, only constants were supported, now any TermArg may be
1517 used. Lin Ming BZ 387, 393
1519 Fixed a problem with AcpiGetDevices where the search of a branch of the
1520 device tree could be terminated prematurely. In accordance with the ACPI
1521 specification, the search down the current branch is terminated if a device
1522 is both not present and not functional (instead of just not present.) Yakui
1525 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
1526 the underlying AML code changed the GPE enable registers. Now, any unknown
1527 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
1528 instead of simply ignored. Rui Zhang.
1530 Fixed a problem with Index Fields where the Index register was incorrectly
1531 limited to a maximum of 32 bits. Now any size may be used.
1533 Fixed a couple memory leaks associated with "implicit return" objects when
1534 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
1536 Example Code and Data Size: These are the sizes for the OS-independent
1537 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1538 debug version of the code includes the debug output trace mechanism and has
1539 a much larger code and data size.
1542 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1543 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1545 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1546 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1548 ----------------------------------------
1549 14 November 2007. Summary of changes for version 20071114:
1551 1) ACPI CA Core Subsystem:
1553 Implemented event counters for each of the Fixed Events, the ACPI SCI
1554 (interrupt) itself, and control methods executed. Named
1555 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
1556 should be useful for debugging and statistics.
1558 Implemented a new external interface, AcpiGetStatistics, to retrieve the
1559 contents of the various event counters. Returns the current values for
1560 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
1561 AcpiMethodCount. The interface can be expanded in the future if new counters
1562 are added. Device drivers should use this interface rather than access the
1565 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
1566 the ShortDivide function worked incorrectly, causing problems with the BCD
1567 functions with large input values. A truncation from 64-bit to 32-bit
1568 inadvertently occurred. Internal BZ 435. Lin Ming
1570 Fixed a problem with Index references passed as method arguments. References
1571 passed as arguments to control methods were dereferenced immediately (before
1572 control was passed to the called method). The references are now correctly
1573 passed directly to the called method. BZ 5389. Lin Ming
1575 Fixed a problem with CopyObject used in conjunction with the Index operator.
1576 The reference was incorrectly dereferenced before the copy. The reference is
1577 now correctly copied. BZ 5391. Lin Ming
1579 Fixed a problem with Control Method references within Package objects. These
1580 references are now correctly generated. This completes the package
1581 construction overhaul that began in version 20071019.
1583 Example Code and Data Size: These are the sizes for the OS-independent
1584 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1585 debug version of the code includes the debug output trace mechanism and has
1586 a much larger code and data size.
1589 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1590 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1592 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1593 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1596 2) iASL Compiler/Disassembler and Tools:
1598 The AcpiExec utility now installs handlers for all of the predefined
1599 Operation Region types. New types supported are: PCI_Config, CMOS, and
1602 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
1603 bit) address fields for the DSDT and FACS within the FADT were not being
1604 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
1607 ----------------------------------------
1608 19 October 2007. Summary of changes for version 20071019:
1610 1) ACPI CA Core Subsystem:
1612 Fixed a problem with the Alias operator when the target of the alias is a
1613 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
1614 Processor, and ThermalZone. In these cases, any children of the original
1615 operator could not be accessed via the alias, potentially causing unexpected
1616 AE_NOT_FOUND exceptions. (BZ 9067)
1618 Fixed a problem with the Package operator where all named references were
1619 created as object references and left otherwise unresolved. According to the
1620 ACPI specification, a Package can only contain Data Objects or references to
1621 control methods. The implication is that named references to Data Objects
1622 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
1623 immediately upon package creation. This is the approach taken with this
1624 change. References to all other named objects (Methods, Devices, Scopes,
1625 etc.) are all now properly created as reference objects. (BZ 5328)
1627 Reverted a change to Notify handling that was introduced in version
1628 20070508. This version changed the Notify handling from asynchronous to
1629 fully synchronous (Device driver Notify handling with respect to the Notify
1630 ASL operator). It was found that this change caused more problems than it
1631 solved and was removed by most users.
1633 Fixed a problem with the Increment and Decrement operators where the type of
1634 the target object could be unexpectedly and incorrectly changed. (BZ 353)
1637 Fixed a problem with the Load and LoadTable operators where the table
1638 location within the namespace was ignored. Instead, the table was always
1639 loaded into the root or current scope. Lin Ming.
1641 Fixed a problem with the Load operator when loading a table from a buffer
1642 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
1644 Fixed a problem with the Debug object where a store of a DdbHandle reference
1645 object to the Debug object could cause a fault.
1647 Added a table checksum verification for the Load operator, in the case where
1648 the load is from a buffer. (BZ 578).
1650 Implemented additional parameter validation for the LoadTable operator. The
1651 length of the input strings SignatureString, OemIdString, and OemTableId are
1652 now checked for maximum lengths. (BZ 582) Lin Ming.
1654 Example Code and Data Size: These are the sizes for the OS-independent
1655 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1656 debug version of the code includes the debug output trace mechanism and has
1657 a much larger code and data size.
1660 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1661 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1663 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1664 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1667 2) iASL Compiler/Disassembler:
1669 Fixed a problem where if a single file was specified and the file did not
1670 exist, no error message was emitted. (Introduced with wildcard support in
1673 ----------------------------------------
1674 19 September 2007. Summary of changes for version 20070919:
1676 1) ACPI CA Core Subsystem:
1678 Designed and implemented new external interfaces to install and remove
1679 handlers for ACPI table-related events. Current events that are defined are
1680 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
1681 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
1682 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
1684 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
1685 (acpi_serialized option on Linux) could cause some systems to hang during
1686 initialization. (Bob Moore) BZ 8171
1688 Fixed a problem where objects of certain types (Device, ThermalZone,
1689 Processor, PowerResource) can be not found if they are declared and
1690 referenced from within the same control method (Lin Ming) BZ 341
1692 Example Code and Data Size: These are the sizes for the OS-independent
1693 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1694 debug version of the code includes the debug output trace mechanism and has
1695 a much larger code and data size.
1698 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1699 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1701 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1702 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1705 2) iASL Compiler/Disassembler:
1707 Implemented support to allow multiple files to be compiled/disassembled in a
1708 single invocation. This includes command line wildcard support for both the
1709 Windows and Unix versions of the compiler. This feature simplifies the
1710 disassembly and compilation of multiple ACPI tables in a single directory.
1712 ----------------------------------------
1713 08 May 2007. Summary of changes for version 20070508:
1715 1) ACPI CA Core Subsystem:
1717 Implemented a Microsoft compatibility design change for the handling of the
1718 Notify AML operator. Previously, notify handlers were dispatched and
1719 executed completely asynchronously in a deferred thread. The new design
1720 still executes the notify handlers in a different thread, but the original
1721 thread that executed the Notify() now waits at a synchronization point for
1722 the notify handler to complete. Some machines depend on a synchronous Notify
1723 operator in order to operate correctly.
1725 Implemented support to allow Package objects to be passed as method
1726 arguments to the external AcpiEvaluateObject interface. Previously, this
1727 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
1728 implemented since there were no reserved control methods that required it
1731 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
1732 contained invalid non-zero values in reserved fields could cause later
1733 failures because these fields have meaning in later revisions of the FADT.
1734 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
1735 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
1737 Fixed a problem where the Global Lock handle was not properly updated if a
1738 thread that acquired the Global Lock via executing AML code then attempted
1739 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
1742 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
1743 could be corrupted if the interrupt being removed was at the head of the
1744 list. Reported by Linn Crosetto.
1746 Example Code and Data Size: These are the sizes for the OS-independent
1747 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1748 debug version of the code includes the debug output trace mechanism and has
1749 a much larger code and data size.
1752 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1753 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1755 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1756 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1758 ----------------------------------------
1759 20 March 2007. Summary of changes for version 20070320:
1761 1) ACPI CA Core Subsystem:
1763 Implemented a change to the order of interpretation and evaluation of AML
1764 operand objects within the AML interpreter. The interpreter now evaluates
1765 operands in the order that they appear in the AML stream (and the
1766 corresponding ASL code), instead of in the reverse order (after the entire
1767 operand list has been parsed). The previous behavior caused several subtle
1768 incompatibilities with the Microsoft AML interpreter as well as being
1769 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
1771 Implemented a change to the ACPI Global Lock support. All interfaces to the
1772 global lock now allow the same thread to acquire the lock multiple times.
1773 This affects the AcpiAcquireGlobalLock external interface to the global lock
1774 as well as the internal use of the global lock to support AML fields -- a
1775 control method that is holding the global lock can now simultaneously access
1776 AML fields that require global lock protection. Previously, in both cases,
1777 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
1778 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
1779 Controller. There is no change to the behavior of the AML Acquire operator,
1780 as this can already be used to acquire a mutex multiple times by the same
1781 thread. BZ 8066. With assistance from Alexey Starikovskiy.
1783 Fixed a problem where invalid objects could be referenced in the AML
1784 Interpreter after error conditions. During operand evaluation, ensure that
1785 the internal "Return Object" field is cleared on error and only valid
1786 pointers are stored there. Caused occasional access to deleted objects that
1787 resulted in "large reference count" warning messages. Valery Podrezov.
1789 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
1790 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
1793 Fixed an internal problem with the handling of result objects on the
1794 interpreter result stack. BZ 7872. Valery Podrezov.
1796 Removed obsolete code that handled the case where AML_NAME_OP is the target
1797 of a reference (Reference.Opcode). This code was no longer necessary. BZ
1798 7874. Valery Podrezov.
1800 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
1801 remnant from the previously discontinued 16-bit support.
1803 Example Code and Data Size: These are the sizes for the OS-independent
1804 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1805 debug version of the code includes the debug output trace mechanism and has
1806 a much larger code and data size.
1809 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1810 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1812 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1813 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1815 ----------------------------------------
1816 26 January 2007. Summary of changes for version 20070126:
1818 1) ACPI CA Core Subsystem:
1820 Added the 2007 copyright to all module headers and signons. This affects
1821 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1824 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
1825 during a table load. A bad pointer was passed in the case where the DSDT is
1826 overridden, causing a fault in this case.
1828 Example Code and Data Size: These are the sizes for the OS-independent
1829 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1830 debug version of the code includes the debug output trace mechanism and has
1831 a much larger code and data size.
1834 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1835 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1837 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1838 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1840 ----------------------------------------
1841 15 December 2006. Summary of changes for version 20061215:
1843 1) ACPI CA Core Subsystem:
1845 Support for 16-bit ACPICA has been completely removed since it is no longer
1846 necessary and it clutters the code. All 16-bit macros, types, and
1847 conditional compiles have been removed, cleaning up and simplifying the code
1848 across the entire subsystem. DOS support is no longer needed since the
1849 bootable Linux firmware kit is now available.
1851 The handler for the Global Lock is now removed during AcpiTerminate to
1852 enable a clean subsystem restart, via the implementation of the
1853 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
1856 Implemented enhancements to the multithreading support within the debugger
1857 to enable improved multithreading debugging and evaluation of the subsystem.
1860 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
1861 memory used during the execution, as well as the maximum memory consumed by
1862 each of the various object types. (Valery Podrezov)
1864 Example Code and Data Size: These are the sizes for the OS-independent
1865 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1866 debug version of the code includes the debug output trace mechanism and has
1867 a much larger code and data size.
1870 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1871 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1873 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1874 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1877 2) iASL Compiler/Disassembler and Tools:
1879 AcpiExec: Implemented a new option (-m) to display full memory use
1880 statistics upon subsystem/program termination. (Valery Podrezov)
1882 ----------------------------------------
1883 09 November 2006. Summary of changes for version 20061109:
1885 1) ACPI CA Core Subsystem:
1887 Optimized the Load ASL operator in the case where the source operand is an
1888 operation region. Simply map the operation region memory, instead of
1889 performing a bytewise read. (Region must be of type SystemMemory, see
1892 Fixed the Load ASL operator for the case where the source operand is a
1893 region field. A buffer object is also allowed as the source operand. BZ 480
1895 Fixed a problem where the Load ASL operator allowed the source operand to be
1896 an operation region of any type. It is now restricted to regions of type
1897 SystemMemory, as per the ACPI specification. BZ 481
1899 Additional cleanup and optimizations for the new Table Manager code.
1901 AcpiEnable will now fail if all of the required ACPI tables are not loaded
1902 (FADT, FACS, DSDT). BZ 477
1904 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
1905 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
1906 manually optimized to be aligned and will not work if it is byte-packed.
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: 78.1K Code, 17.1K Data, 95.2K Total
1915 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1917 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1918 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1921 2) iASL Compiler/Disassembler and Tools:
1923 Fixed a problem where the presence of the _OSI predefined control method
1924 within complex expressions could cause an internal compiler error.
1926 AcpiExec: Implemented full region support for multiple address spaces.
1927 SpaceId is now part of the REGION object. BZ 429
1929 ----------------------------------------
1930 11 October 2006. Summary of changes for version 20061011:
1932 1) ACPI CA Core Subsystem:
1934 Completed an AML interpreter performance enhancement for control method
1935 execution. Previously a 2-pass parse/execution, control methods are now
1936 completely parsed and executed in a single pass. This improves overall
1937 interpreter performance by ~25%, reduces code size, and reduces CPU stack
1938 use. (Valery Podrezov + interpreter changes in version 20051202 that
1939 eliminated namespace loading during the pass one parse.)
1941 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
1942 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
1943 obtained and also checked for an ID match.
1945 Implemented additional support for the PCI _ADR execution: upsearch until a
1946 device scope is found before executing _ADR. This allows PCI_Config
1947 operation regions to be declared locally within control methods underneath
1950 Fixed a problem with a possible race condition between threads executing
1951 AcpiWalkNamespace and the AML interpreter. This condition was removed by
1952 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
1953 entries created during any concurrent control method execution. An
1954 additional namespace race condition is known to exist between
1955 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
1958 Restructured the AML ParseLoop function, breaking it into several
1959 subfunctions in order to reduce CPU stack use and improve maintainability.
1962 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
1963 of prefix handle and pathname. BZ 478
1965 Example Code and Data Size: These are the sizes for the OS-independent
1966 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1967 debug version of the code includes the debug output trace mechanism and has
1968 a much larger code and data size.
1971 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1972 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
1974 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
1975 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1977 2) iASL Compiler/Disassembler and Tools:
1979 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
1980 to restore original behavior.
1982 ----------------------------------------
1983 27 September 2006. Summary of changes for version 20060927:
1985 1) ACPI CA Core Subsystem:
1987 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
1988 These functions now use a spinlock for mutual exclusion and the interrupt
1989 level indication flag is not needed.
1991 Fixed a problem with the Global Lock where the lock could appear to be
1992 obtained before it is actually obtained. The global lock semaphore was
1993 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
1996 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
1997 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
1999 Example Code and Data Size: These are the sizes for the OS-independent
2000 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2001 debug version of the code includes the debug output trace mechanism and has
2002 a much larger code and data size.
2005 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2006 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2008 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2009 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2012 2) iASL Compiler/Disassembler and Tools:
2014 Fixed a compilation problem with the pre-defined Resource Descriptor field
2015 names where an "object does not exist" error could be incorrectly generated
2016 if the parent ResourceTemplate pathname places the template within a
2017 different namespace scope than the current scope. (BZ 7212)
2019 Fixed a problem where the compiler could hang after syntax errors detected
2020 in an ElseIf construct. (BZ 453)
2022 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
2023 operator. An incorrect output filename was produced when this parameter was
2024 a null string (""). Now, the original input filename is used as the AML
2025 output filename, with an ".aml" extension.
2027 Implemented a generic batch command mode for the AcpiExec utility (execute
2028 any AML debugger command) (Valery Podrezov).
2030 ----------------------------------------
2031 12 September 2006. Summary of changes for version 20060912:
2033 1) ACPI CA Core Subsystem:
2035 Enhanced the implementation of the "serialized mode" of the interpreter
2036 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
2037 specified, instead of creating a serialization semaphore per control method,
2038 the interpreter lock is simply no longer released before a blocking
2039 operation during control method execution. This effectively makes the AML
2040 Interpreter single-threaded. The overhead of a semaphore per-method is
2043 Fixed a regression where an error was no longer emitted if a control method
2044 attempts to create 2 objects of the same name. This once again returns
2045 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
2046 will dynamically serialize the control method to possible prevent future
2049 Integrated a fix for a problem with PCI Express HID detection in the PCI
2050 Config Space setup procedure. (BZ 7145)
2052 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
2053 AcpiHwInitialize function - the FADT registers are now validated when the
2056 Added two new warnings during FADT verification - 1) if the FADT is larger
2057 than the largest known FADT version, and 2) if there is a mismatch between a
2058 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
2060 Example Code and Data Size: These are the sizes for the OS-independent
2061 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2062 debug version of the code includes the debug output trace mechanism and has
2063 a much larger code and data size.
2066 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2067 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2069 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2070 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2073 2) iASL Compiler/Disassembler and Tools:
2075 Fixed a problem with the implementation of the Switch() operator where the
2076 temporary variable was declared too close to the actual Switch, instead of
2077 at method level. This could cause a problem if the Switch() operator is
2078 within a while loop, causing an error on the second iteration. (BZ 460)
2080 Disassembler - fix for error emitted for unknown type for target of scope
2081 operator. Now, ignore it and continue.
2083 Disassembly of an FADT now verifies the input FADT and reports any errors
2084 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
2086 Disassembly of raw data buffers with byte initialization data now prefixes
2087 each output line with the current buffer offset.
2089 Disassembly of ASF! table now includes all variable-length data fields at
2090 the end of some of the subtables.
2092 The disassembler now emits a comment if a buffer appears to be a
2093 ResourceTemplate, but cannot be disassembled as such because the EndTag does
2094 not appear at the very end of the buffer.
2096 AcpiExec - Added the "-t" command line option to enable the serialized mode
2097 of the AML interpreter.
2099 ----------------------------------------
2100 31 August 2006. Summary of changes for version 20060831:
2102 1) ACPI CA Core Subsystem:
2104 Miscellaneous fixes for the Table Manager:
2105 - Correctly initialize internal common FADT for all 64-bit "X" fields
2106 - Fixed a couple table mapping issues during table load
2107 - Fixed a couple alignment issues for IA64
2108 - Initialize input array to zero in AcpiInitializeTables
2109 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
2112 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
2113 immediately disabled to prevent the waking GPE from firing again and to
2114 prevent other wake GPEs from interrupting the wake process.
2116 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
2117 be used for debugging systems with a large number of ACPI interrupts.
2119 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
2120 both the ACPICA headers and the disassembler.
2122 Example Code and Data Size: These are the sizes for the OS-independent
2123 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2124 debug version of the code includes the debug output trace mechanism and has
2125 a much larger code and data size.
2128 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2129 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2131 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2132 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2135 2) iASL Compiler/Disassembler and Tools:
2137 Disassembler support for the DMAR ACPI table.
2139 ----------------------------------------
2140 23 August 2006. Summary of changes for version 20060823:
2142 1) ACPI CA Core Subsystem:
2144 The Table Manager component has been completely redesigned and
2145 reimplemented. The new design is much simpler, and reduces the overall code
2146 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
2147 now possible to obtain the ACPI tables very early during kernel
2148 initialization, even before dynamic memory management is initialized.
2149 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
2151 Obsolete ACPICA interfaces:
2153 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
2155 - AcpiLoadTable: Not needed.
2156 - AcpiUnloadTable: Not needed.
2158 New ACPICA interfaces:
2160 - AcpiInitializeTables: Must be called before the table manager can be used.
2161 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
2162 allocated memory after it becomes available.
2163 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
2166 Other ACPICA changes:
2168 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
2169 AcpiOsUnmapMemory to free this mapping.
2170 - AcpiGetTable returns the actual mapped table. The mapping is managed
2171 internally and must not be deleted by the caller. Use of this interface
2172 causes no additional dynamic memory allocation.
2173 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
2174 it appeared to be unused.
2175 - The interface to AcpiOsMapMemory has changed to be consistent with the
2176 other allocation interfaces.
2177 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
2179 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
2180 bit platforms. Was previously 64 bits on all platforms.
2181 - The interface to the ACPI Global Lock acquire/release macros have changed
2182 slightly since ACPICA no longer keeps a local copy of the FACS with a
2183 constructed pointer to the actual global lock.
2185 Porting to the new table manager:
2187 - AcpiInitializeTables: Must be called once, and can be called anytime
2188 during the OS initialization process. It allows the host to specify an area
2189 of memory to be used to store the internal version of the RSDT/XSDT (root
2190 table). This allows the host to access ACPI tables before memory management
2191 is initialized and running.
2192 - AcpiReallocateRootTable: Can be called after memory management is running
2193 to copy the root table to a dynamically allocated array, freeing up the
2194 scratch memory specified in the call to AcpiInitializeTables.
2195 - AcpiSubsystemInitialize: This existing interface is independent of the
2196 Table Manager, and does not have to be called before the Table Manager can
2197 be used, it only must be called before the rest of ACPICA can be used.
2198 - ACPI Tables: Some changes have been made to the names and structure of the
2199 actbl.h and actbl1.h header files and may require changes to existing code.
2200 For example, bitfields have been completely removed because of their lack of
2201 portability across C compilers.
2202 - Update interfaces to the Global Lock acquire/release macros if local
2203 versions are used. (see acwin.h)
2205 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
2209 Example Code and Data Size: These are the sizes for the OS-independent
2210 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2211 debug version of the code includes the debug output trace mechanism and has
2212 a much larger code and data size.
2215 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2216 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2218 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2219 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2222 2) iASL Compiler/Disassembler and Tools:
2224 No changes for this release.
2226 ----------------------------------------
2227 21 July 2006. Summary of changes for version 20060721:
2229 1) ACPI CA Core Subsystem:
2231 The full source code for the ASL test suite used to validate the iASL
2232 compiler and the ACPICA core subsystem is being released with the ACPICA
2233 source for the first time. The source is contained in a separate package and
2234 consists of over 1100 files that exercise all ASL/AML operators. The package
2235 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
2238 Completed a new design and implementation for support of the ACPI Global
2239 Lock. On the OS side, the global lock is now treated as a standard AML
2240 mutex. Previously, multiple OS threads could "acquire" the global lock
2241 simultaneously. However, this could cause the BIOS to be starved out of the
2242 lock - especially in cases such as the Embedded Controller driver where
2243 there is a tight coupling between the OS and the BIOS.
2245 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
2246 The Global Lock interrupt handler no longer queues the execution of a
2247 separate thread to signal the global lock semaphore. Instead, the semaphore
2248 is signaled directly from the interrupt handler.
2250 Implemented support within the AML interpreter for package objects that
2251 contain a larger AML length (package list length) than the package element
2252 count. In this case, the length of the package is truncated to match the
2253 package element count. Some BIOS code apparently modifies the package length
2254 on the fly, and this change supports this behavior. Provides compatibility
2255 with the MS AML interpreter. (With assistance from Fiodor Suietov)
2257 Implemented a temporary fix for the BankValue parameter of a Bank Field to
2258 support all constant values, now including the Zero and One opcodes.
2259 Evaluation of this parameter must eventually be converted to a full TermArg
2260 evaluation. A not-implemented error is now returned (temporarily) for non-
2261 constant values for this parameter.
2263 Fixed problem reports (Fiodor Suietov) integrated:
2264 - Fix for premature object deletion after CopyObject on Operation Region (BZ
2267 Example Code and Data Size: These are the sizes for the OS-independent
2268 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2269 debug version of the code includes the debug output trace mechanism and has
2270 a much larger code and data size.
2273 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
2274 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
2276 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2277 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2280 2) iASL Compiler/Disassembler and Tools:
2282 No changes for this release.
2284 ----------------------------------------
2285 07 July 2006. Summary of changes for version 20060707:
2287 1) ACPI CA Core Subsystem:
2289 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
2290 that do not allow the initialization of address pointers within packed
2291 structures - even though the hardware itself may support misaligned
2292 transfers. Some of the debug data structures are packed by default to
2295 Added an error message for the case where AcpiOsGetThreadId() returns zero.
2296 A non-zero value is required by the core ACPICA code to ensure the proper
2297 operation of AML mutexes and recursive control methods.
2299 The DSDT is now the only ACPI table that determines whether the AML
2300 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
2301 the hooks for per-table 32/64 switching have been removed from the code. A
2302 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
2304 Fixed a possible leak of an OwnerID in the error path of
2305 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
2306 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
2307 when using the AcpiTbDeleteTablesByType interface (with assistance from
2310 Fixed a problem with Serialized control methods where the semaphore
2311 associated with the method could be over-signaled after multiple method
2314 Fixed two issues with the locking of the internal namespace data structure.
2315 Both the Unload() operator and AcpiUnloadTable interface now lock the
2316 namespace during the namespace deletion associated with the table unload
2317 (with assistance from Linn Crosetto.)
2319 Fixed problem reports (Valery Podrezov) integrated:
2320 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
2322 Fixed problem reports (Fiodor Suietov) integrated:
2323 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
2324 - On Address Space handler deletion, needless deactivation call (BZ 374)
2325 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
2326 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
2328 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
2329 - Minimum Length of RSDT should be validated (BZ 379)
2330 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
2332 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
2335 Example Code and Data Size: These are the sizes for the OS-independent
2336 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2337 debug version of the code includes the debug output trace mechanism and has
2338 a much larger code and data size.
2341 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2342 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2344 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2345 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2348 2) iASL Compiler/Disassembler and Tools:
2350 Fixed problem reports:
2351 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2354 ----------------------------------------
2355 23 June 2006. Summary of changes for version 20060623:
2357 1) ACPI CA Core Subsystem:
2359 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
2360 allows the type to be customized to the host OS for improved efficiency
2361 (since a spinlock is usually a very small object.)
2363 Implemented support for "ignored" bits in the ACPI registers. According to
2364 the ACPI specification, these bits should be preserved when writing the
2365 registers via a read/modify/write cycle. There are 3 bits preserved in this
2366 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
2368 Implemented the initial deployment of new OSL mutex interfaces. Since some
2369 host operating systems have separate mutex and semaphore objects, this
2370 feature was requested. The base code now uses mutexes (and the new mutex
2371 interfaces) wherever a binary semaphore was used previously. However, for
2372 the current release, the mutex interfaces are defined as macros to map them
2373 to the existing semaphore interfaces. Therefore, no OSL changes are required
2374 at this time. (See acpiosxf.h)
2376 Fixed several problems with the support for the control method SyncLevel
2377 parameter. The SyncLevel now works according to the ACPI specification and
2378 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
2379 is a property of the executing thread. Mutual exclusion for control methods
2380 is now implemented with a mutex instead of a semaphore.
2382 Fixed three instances of the use of the C shift operator in the bitfield
2383 support code (exfldio.c) to avoid the use of a shift value larger than the
2384 target data width. The behavior of C compilers is undefined in this case and
2385 can cause unpredictable results, and therefore the case must be detected and
2386 avoided. (Fiodor Suietov)
2388 Added an info message whenever an SSDT or OEM table is loaded dynamically
2389 via the Load() or LoadTable() ASL operators. This should improve debugging
2390 capability since it will show exactly what tables have been loaded (beyond
2391 the tables present in the RSDT/XSDT.)
2393 Example Code and Data Size: These are the sizes for the OS-independent
2394 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2395 debug version of the code includes the debug output trace mechanism and has
2396 a much larger code and data size.
2399 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2400 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2402 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2403 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2406 2) iASL Compiler/Disassembler and Tools:
2408 No changes for this release.
2410 ----------------------------------------
2411 08 June 2006. Summary of changes for version 20060608:
2413 1) ACPI CA Core Subsystem:
2415 Converted the locking mutex used for the ACPI hardware to a spinlock. This
2416 change should eliminate all problems caused by attempting to acquire a
2417 semaphore at interrupt level, and it means that all ACPICA external
2418 interfaces that directly access the ACPI hardware can be safely called from
2419 interrupt level. OSL code that implements the semaphore interfaces should be
2420 able to eliminate any workarounds for being called at interrupt level.
2422 Fixed a regression introduced in 20060526 where the ACPI device
2423 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
2424 did not have an optional _INI method.
2426 Fixed an IndexField issue where a write to the Data Register should be
2427 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
2430 Fixed problem reports (Valery Podrezov) integrated:
2431 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
2433 Fixed problem reports (Fiodor Suietov) integrated:
2434 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
2436 Removed four global mutexes that were obsolete and were no longer being
2439 Example Code and Data Size: These are the sizes for the OS-independent
2440 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2441 debug version of the code includes the debug output trace mechanism and has
2442 a much larger code and data size.
2445 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2446 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2448 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2449 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2452 2) iASL Compiler/Disassembler and Tools:
2454 Fixed a fault when using -g option (get tables from registry) on Windows
2457 Fixed problem reports integrated:
2458 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
2459 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
2461 - Global table revision override (-r) is ignored (BZ 413)
2463 ----------------------------------------
2464 26 May 2006. Summary of changes for version 20060526:
2466 1) ACPI CA Core Subsystem:
2468 Restructured, flattened, and simplified the internal interfaces for
2469 namespace object evaluation - resulting in smaller code, less CPU stack use,
2470 and fewer interfaces. (With assistance from Mikhail Kouzmich)
2472 Fixed a problem with the CopyObject operator where the first parameter was
2473 not typed correctly for the parser, interpreter, compiler, and disassembler.
2474 Caused various errors and unexpected behavior.
2476 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
2477 produced incorrect results with some C compilers. Since the behavior of C
2478 compilers when the shift value is larger than the datatype width is
2479 apparently not well defined, the interpreter now detects this condition and
2480 simply returns zero as expected in all such cases. (BZ 395)
2482 Fixed problem reports (Valery Podrezov) integrated:
2483 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
2484 - Allow interpreter to handle nested method declarations (BZ 5361)
2486 Fixed problem reports (Fiodor Suietov) integrated:
2487 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
2488 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
2489 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
2490 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
2491 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
2492 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
2493 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
2494 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
2495 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
2496 - Status of the Global Initialization Handler call not used (BZ 366)
2497 - Incorrect object parameter to Global Initialization Handler (BZ 367)
2499 Example Code and Data Size: These are the sizes for the OS-independent
2500 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2501 debug version of the code includes the debug output trace mechanism and has
2502 a much larger code and data size.
2505 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2506 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2508 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2509 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2512 2) iASL Compiler/Disassembler and Tools:
2514 Modified the parser to allow the names IO, DMA, and IRQ to be used as
2515 namespace identifiers with no collision with existing resource descriptor
2516 macro names. This provides compatibility with other ASL compilers and is
2517 most useful for disassembly/recompilation of existing tables without parse
2518 errors. (With assistance from Thomas Renninger)
2520 Disassembler: fixed an incorrect disassembly problem with the
2521 DataTableRegion and CopyObject operators. Fixed a possible fault during
2522 disassembly of some Alias operators.
2524 ----------------------------------------
2525 12 May 2006. Summary of changes for version 20060512:
2527 1) ACPI CA Core Subsystem:
2529 Replaced the AcpiOsQueueForExecution interface with a new interface named
2530 AcpiOsExecute. The major difference is that the new interface does not have
2531 a Priority parameter, this appeared to be useless and has been replaced by a
2532 Type parameter. The Type tells the host what type of execution is being
2533 requested, such as global lock handler, notify handler, GPE handler, etc.
2534 This allows the host to queue and execute the request as appropriate for the
2535 request type, possibly using different work queues and different priorities
2536 for the various request types. This enables fixes for multithreading
2537 deadlock problems such as BZ #5534, and will require changes to all existing
2538 OS interface layers. (Alexey Starikovskiy and Bob Moore)
2540 Fixed a possible memory leak associated with the support for the so-called
2541 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
2544 Fixed a problem with the Load() operator where a table load from an
2545 operation region could overwrite an internal table buffer by up to 7 bytes
2546 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
2548 Example Code and Data Size: These are the sizes for the OS-independent
2549 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2550 debug version of the code includes the debug output trace mechanism and has
2551 a much larger code and data size.
2554 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2555 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2557 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2558 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2562 2) iASL Compiler/Disassembler and Tools:
2564 Disassembler: Implemented support to cross reference the internal namespace
2565 and automatically generate ASL External() statements for symbols not defined
2566 within the current table being disassembled. This will simplify the
2567 disassembly and recompilation of interdependent tables such as SSDTs since
2568 these statements will no longer have to be added manually.
2570 Disassembler: Implemented experimental support to automatically detect
2571 invocations of external control methods and generate appropriate External()
2572 statements. This is problematic because the AML cannot be correctly parsed
2573 until the number of arguments for each control method is known. Currently,
2574 standalone method invocations and invocations as the source operand of a
2575 Store() statement are supported.
2577 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
2578 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
2579 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
2580 more readable and likely closer to the original ASL source.
2582 ----------------------------------------
2583 21 April 2006. Summary of changes for version 20060421:
2585 1) ACPI CA Core Subsystem:
2587 Removed a device initialization optimization introduced in 20051216 where
2588 the _STA method was not run unless an _INI was also present for the same
2589 device. This optimization could cause problems because it could allow _INI
2590 methods to be run within a not-present device subtree. (If a not-present
2591 device had no _INI, _STA would not be run, the not-present status would not
2592 be discovered, and the children of the device would be incorrectly
2595 Implemented a new _STA optimization where namespace subtrees that do not
2596 contain _INI are identified and ignored during device initialization.
2597 Selectively running _STA can significantly improve boot time on large
2598 machines (with assistance from Len Brown.)
2600 Implemented support for the device initialization case where the returned
2601 _STA flags indicate a device not-present but functioning. In this case, _INI
2602 is not run, but the device children are examined for presence, as per the
2605 Implemented an additional change to the IndexField support in order to
2606 conform to MS behavior. The value written to the Index Register is not
2607 simply a byte offset, it is a byte offset in units of the access width of
2608 the parent Index Field. (Fiodor Suietov)
2610 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
2611 interface is called during the creation of all AML operation regions, and
2612 allows the host OS to exert control over what addresses it will allow the
2613 AML code to access. Operation Regions whose addresses are disallowed will
2614 cause a runtime exception when they are actually accessed (will not affect
2615 or abort table loading.) See oswinxf or osunixxf for an example
2618 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
2619 interface allows the host OS to match the various "optional"
2620 interface/behavior strings for the _OSI predefined control method as
2621 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
2622 for an example implementation.
2624 Restructured and corrected various problems in the exception handling code
2625 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
2626 (with assistance from Takayoshi Kochi.)
2628 Modified the Linux source converter to ignore quoted string literals while
2629 converting identifiers from mixed to lower case. This will correct problems
2630 with the disassembler and other areas where such strings must not be
2633 The ACPI_FUNCTION_* macros no longer require quotes around the function
2634 name. This allows the Linux source converter to convert the names, now that
2635 the converter ignores quoted strings.
2637 Example Code and Data Size: These are the sizes for the OS-independent
2638 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2639 debug version of the code includes the debug output trace mechanism and has
2640 a much larger code and data size.
2644 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2645 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2647 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2648 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2651 2) iASL Compiler/Disassembler and Tools:
2653 Implemented 3 new warnings for iASL, and implemented multiple warning levels
2656 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
2657 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
2658 check for the possible timeout, a warning is issued.
2660 2) Useless operators: If an ASL operator does not specify an optional target
2661 operand and it also does not use the function return value from the
2662 operator, a warning is issued since the operator effectively does nothing.
2664 3) Unreferenced objects: If a namespace object is created, but never
2665 referenced, a warning is issued. This is a warning level 2 since there are
2666 cases where this is ok, such as when a secondary table is loaded that uses
2667 the unreferenced objects. Even so, care is taken to only flag objects that
2668 don't look like they will ever be used. For example, the reserved methods
2669 (starting with an underscore) are usually not referenced because it is
2670 expected that the OS will invoke them.
2672 ----------------------------------------
2673 31 March 2006. Summary of changes for version 20060331:
2675 1) ACPI CA Core Subsystem:
2677 Implemented header file support for the following additional ACPI tables:
2678 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
2679 all current and known ACPI tables are now defined in the ACPICA headers and
2680 are available for use by device drivers and other software.
2682 Implemented support to allow tables that contain ACPI names with invalid
2683 characters to be loaded. Previously, this would cause the table load to
2684 fail, but since there are several known cases of such tables on existing
2685 machines, this change was made to enable ACPI support for them. Also, this
2686 matches the behavior of the Microsoft ACPI implementation.
2688 Fixed a couple regressions introduced during the memory optimization in the
2689 20060317 release. The namespace node definition required additional
2690 reorganization and an internal datatype that had been changed to 8-bit was
2691 restored to 32-bit. (Valery Podrezov)
2693 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
2694 could be passed through to AcpiOsReleaseObject which is unexpected. Such
2695 null pointers are now trapped and ignored, matching the behavior of the
2696 previous implementation before the deployment of AcpiOsReleaseObject.
2697 (Valery Podrezov, Fiodor Suietov)
2699 Fixed a memory mapping leak during the deletion of a SystemMemory operation
2700 region where a cached memory mapping was not deleted. This became a
2701 noticeable problem for operation regions that are defined within frequently
2702 used control methods. (Dana Meyers)
2704 Reorganized the ACPI table header files into two main files: one for the
2705 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
2706 ACPI tables that are consumed by the drivers and other software. The various
2707 FADT definitions were merged into one common section and three different
2708 tables (ACPI 1.0, 1.0+, and 2.0)
2710 Example Code and Data Size: These are the sizes for the OS-independent
2711 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2712 debug version of the code includes the debug output trace mechanism and has
2713 a much larger code and data size.
2716 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2717 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2719 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2720 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2723 2) iASL Compiler/Disassembler and Tools:
2725 Disassembler: Implemented support to decode and format all non-AML ACPI
2726 tables (tables other than DSDTs and SSDTs.) This includes the new tables
2727 added to the ACPICA headers, therefore all current and known ACPI tables are
2730 Disassembler: The change to allow ACPI names with invalid characters also
2731 enables the disassembly of such tables. Invalid characters within names are
2732 changed to '*' to make the name printable; the iASL compiler will still
2733 generate an error for such names, however, since this is an invalid ACPI
2736 Implemented an option for AcpiXtract (-a) to extract all tables found in the
2737 input file. The default invocation extracts only the DSDTs and SSDTs.
2739 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
2740 makefile for the AcpiXtract utility.
2742 ----------------------------------------
2743 17 March 2006. Summary of changes for version 20060317:
2745 1) ACPI CA Core Subsystem:
2747 Implemented the use of a cache object for all internal namespace nodes.
2748 Since there are about 1000 static nodes in a typical system, this will
2749 decrease memory use for cache implementations that minimize per-allocation
2750 overhead (such as a slab allocator.)
2752 Removed the reference count mechanism for internal namespace nodes, since it
2753 was deemed unnecessary. This reduces the size of each namespace node by
2754 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
2755 and 32 bytes for the 64-bit case.
2757 Optimized several internal data structures to reduce object size on 64-bit
2758 platforms by packing data within the 64-bit alignment. This includes the
2759 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
2760 instances corresponding to the namespace objects.
2762 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
2765 Split the allocation tracking mechanism out to a separate file, from
2766 utalloc.c to uttrack.c. This mechanism appears to be only useful for
2767 application-level code. Kernels may wish to not include uttrack.c in
2770 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
2771 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
2774 Code and Data Size: These are the sizes for the acpica.lib produced by the
2775 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2776 driver or OSPM code. The debug version of the code includes the debug output
2777 trace mechanism and has a much larger code and data size. Note that these
2778 values will vary depending on the efficiency of the compiler and the
2779 compiler options used during generation.
2782 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2783 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2785 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2786 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2789 2) iASL Compiler/Disassembler and Tools:
2791 Implemented an ANSI C version of the acpixtract utility. This version will
2792 automatically extract the DSDT and all SSDTs from the input acpidump text
2793 file and dump the binary output to separate files. It can also display a
2794 summary of the input file including the headers for each table found and
2795 will extract any single ACPI table, with any signature. (See
2796 source/tools/acpixtract)
2798 ----------------------------------------
2799 10 March 2006. Summary of changes for version 20060310:
2801 1) ACPI CA Core Subsystem:
2803 Tagged all external interfaces to the subsystem with the new
2804 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
2805 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
2806 macro. The default definition is NULL.
2808 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
2809 This allows the host to define this as necessary to simplify kernel
2810 integration. The default definition is ACPI_NATIVE_UINT.
2812 Fixed two interpreter problems related to error processing, the deletion of
2813 objects, and placing invalid pointers onto the internal operator result
2814 stack. BZ 6028, 6151 (Valery Podrezov)
2816 Increased the reference count threshold where a warning is emitted for large
2817 reference counts in order to eliminate unnecessary warnings on systems with
2818 large namespaces (especially 64-bit.) Increased the value from 0x400 to
2821 Due to universal disagreement as to the meaning of the 'c' in the calloc()
2822 function, the ACPI_MEM_CALLOCATE macro has been renamed to
2823 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
2824 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
2827 Code and Data Size: These are the sizes for the acpica.lib produced by the
2828 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2829 driver or OSPM code. The debug version of the code includes the debug output
2830 trace mechanism and has a much larger code and data size. Note that these
2831 values will vary depending on the efficiency of the compiler and the
2832 compiler options used during generation.
2835 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2836 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2838 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2839 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2842 2) iASL Compiler/Disassembler:
2844 Disassembler: implemented support for symbolic resource descriptor
2845 references. If a CreateXxxxField operator references a fixed offset within a
2846 resource descriptor, a name is assigned to the descriptor and the offset is
2847 translated to the appropriate resource tag and pathname. The addition of
2848 this support brings the disassembled code very close to the original ASL
2849 source code and helps eliminate run-time errors when the disassembled code
2850 is modified (and recompiled) in such a way as to invalidate the original
2853 Implemented support for a Descriptor Name as the last parameter to the ASL
2854 Register() macro. This parameter was inadvertently left out of the ACPI
2855 specification, and will be added for ACPI 3.0b.
2857 Fixed a problem where the use of the "_OSI" string (versus the full path
2858 "\_OSI") caused an internal compiler error. ("No back ptr to op")
2860 Fixed a problem with the error message that occurs when an invalid string is
2861 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
2862 The correct message is now displayed.
2864 ----------------------------------------
2865 17 February 2006. Summary of changes for version 20060217:
2867 1) ACPI CA Core Subsystem:
2869 Implemented a change to the IndexField support to match the behavior of the
2870 Microsoft AML interpreter. The value written to the Index register is now a
2871 byte offset, no longer an index based upon the width of the Data register.
2872 This should fix IndexField problems seen on some machines where the Data
2873 register is not exactly one byte wide. The ACPI specification will be
2874 clarified on this point.
2876 Fixed a problem where several resource descriptor types could overrun the
2877 internal descriptor buffer due to size miscalculation: VendorShort,
2878 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
2879 affect all platforms.
2881 Fixed a problem where individual resource descriptors were misaligned within
2882 the internal buffer, causing alignment faults on IA64 platforms.
2884 Code and Data Size: These are the sizes for the acpica.lib produced by the
2885 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2886 driver or OSPM code. The debug version of the code includes the debug output
2887 trace mechanism and has a much larger code and data size. Note that these
2888 values will vary depending on the efficiency of the compiler and the
2889 compiler options used during generation.
2892 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2893 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2895 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2896 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2899 2) iASL Compiler/Disassembler:
2901 Implemented support for new reserved names: _WDG and _WED are Microsoft
2902 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
2903 defined method (Throttling Depth Limit.)
2905 Fixed a problem where a zero-length VendorShort or VendorLong resource
2906 descriptor was incorrectly emitted as a descriptor of length one.
2908 ----------------------------------------
2909 10 February 2006. Summary of changes for version 20060210:
2911 1) ACPI CA Core Subsystem:
2913 Removed a couple of extraneous ACPI_ERROR messages that appeared during
2914 normal execution. These became apparent after the conversion from
2917 Fixed a problem where the CreateField operator could hang if the BitIndex or
2918 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
2920 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
2921 failed with an exception. This also fixes a couple of related RefOf and
2922 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
2924 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
2925 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
2928 Implemented a memory cleanup at the end of the execution of each iteration
2929 of an AML While() loop, preventing the accumulation of outstanding objects.
2930 (Valery Podrezov, BZ 5427)
2932 Eliminated a chunk of duplicate code in the object resolution code. (Valery
2935 Fixed several warnings during the 64-bit code generation.
2937 The AcpiSrc source code conversion tool now inserts one line of whitespace
2938 after an if() statement that is followed immediately by a comment, improving
2939 readability of the Linux code.
2941 Code and Data Size: The current and previous library sizes for the core
2942 subsystem are shown below. These are the code and data sizes for the
2943 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2944 values do not include any ACPI driver or OSPM code. The debug version of the
2945 code includes the debug output trace mechanism and has a much larger code
2946 and data size. Note that these values will vary depending on the efficiency
2947 of the compiler and the compiler options used during generation.
2950 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
2951 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
2953 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2954 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2957 2) iASL Compiler/Disassembler:
2959 Fixed a problem with the disassembly of a BankField operator with a complex
2960 expression for the BankValue parameter.
2962 ----------------------------------------
2963 27 January 2006. Summary of changes for version 20060127:
2965 1) ACPI CA Core Subsystem:
2967 Implemented support in the Resource Manager to allow unresolved namestring
2968 references within resource package objects for the _PRT method. This support
2969 is in addition to the previously implemented unresolved reference support
2970 within the AML parser. If the interpreter slack mode is enabled, these
2971 unresolved references will be passed through to the caller as a NULL package
2974 Implemented and deployed new macros and functions for error and warning
2975 messages across the subsystem. These macros are simpler and generate less
2976 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
2977 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
2978 macros remain defined to allow ACPI drivers time to migrate to the new
2981 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
2982 Acquire/Release Lock OSL interfaces.
2984 Fixed a problem where Alias ASL operators are sometimes not correctly
2985 resolved, in both the interpreter and the iASL compiler.
2987 Fixed several problems with the implementation of the ConcatenateResTemplate
2988 ASL operator. As per the ACPI specification, zero length buffers are now
2989 treated as a single EndTag. One-length buffers always cause a fatal
2990 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
2991 cause a fatal exception.
2993 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
2994 interface. (With assistance from Thomas Renninger)
2996 Code and Data Size: The current and previous library sizes for the core
2997 subsystem are shown below. These are the code and data sizes for the
2998 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2999 values do not include any ACPI driver or OSPM code. The debug version of the
3000 code includes the debug output trace mechanism and has a much larger code
3001 and data size. Note that these values will vary depending on the efficiency
3002 of the compiler and the compiler options used during generation.
3005 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3006 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3008 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3009 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3012 2) iASL Compiler/Disassembler:
3014 Fixed an internal error that was generated for any forward references to ASL
3017 ----------------------------------------
3018 13 January 2006. Summary of changes for version 20060113:
3020 1) ACPI CA Core Subsystem:
3022 Added 2006 copyright to all module headers and signons. This affects
3023 virtually every file in the ACPICA core subsystem, iASL compiler, and the
3026 Enhanced the ACPICA error reporting in order to simplify user migration to
3027 the non-debug version of ACPICA. Replaced all instances of the
3028 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
3029 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
3030 respectively. This preserves all error and warning messages in the non-debug
3031 version of the ACPICA code (this has been referred to as the "debug lite"
3032 option.) Over 200 cases were converted to create a total of over 380
3033 error/warning messages across the ACPICA code. This increases the code and
3034 data size of the default non-debug version of the code somewhat (about 13K),
3035 but all error/warning reporting may be disabled if desired (and code
3036 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
3037 configuration option. The size of the debug version of ACPICA remains about
3040 Fixed a memory leak within the AML Debugger "Set" command. One object was
3041 not properly deleted for every successful invocation of the command.
3043 Code and Data Size: The current and previous library sizes for the core
3044 subsystem are shown below. These are the code and data sizes for the
3045 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3046 values do not include any ACPI driver or OSPM code. The debug version of the
3047 code includes the debug output trace mechanism and has a much larger code
3048 and data size. Note that these values will vary depending on the efficiency
3049 of the compiler and the compiler options used during generation.
3052 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3053 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3055 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3056 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3059 2) iASL Compiler/Disassembler:
3061 The compiler now officially supports the ACPI 3.0a specification that was
3062 released on December 30, 2005. (Specification is available at www.acpi.info)
3064 ----------------------------------------
3065 16 December 2005. Summary of changes for version 20051216:
3067 1) ACPI CA Core Subsystem:
3069 Implemented optional support to allow unresolved names within ASL Package
3070 objects. A null object is inserted in the package when a named reference
3071 cannot be located in the current namespace. Enabled via the interpreter
3072 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
3073 that contain such code.
3075 Implemented an optimization to the initialization sequence that can improve
3076 boot time. During ACPI device initialization, the _STA method is now run if
3077 and only if the _INI method exists. The _STA method is used to determine if
3078 the device is present; An _INI can only be run if _STA returns present, but
3079 it is a waste of time to run the _STA method if the _INI does not exist.
3080 (Prototype and assistance from Dong Wei)
3082 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
3083 available in the current compiler. Otherwise, the default (void *) cast is
3086 Fixed some possible memory leaks found within the execution path of the
3087 Break, Continue, If, and CreateField operators. (Valery Podrezov)
3089 Fixed a problem introduced in the 20051202 release where an exception is
3090 generated during method execution if a control method attempts to declare
3093 Moved resource descriptor string constants that are used by both the AML
3094 disassembler and AML debugger to the common utilities directory so that
3095 these components are independent.
3097 Implemented support in the AcpiExec utility (-e switch) to globally ignore
3098 exceptions during control method execution (method is not aborted.)
3100 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
3103 Code and Data Size: The current and previous library sizes for the core
3104 subsystem are shown below. These are the code and data sizes for the
3105 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3106 values do not include any ACPI driver or OSPM code. The debug version of the
3107 code includes the debug output trace mechanism and has a much larger code
3108 and data size. Note that these values will vary depending on the efficiency
3109 of the compiler and the compiler options used during generation.
3112 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3113 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3115 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3116 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3119 2) iASL Compiler/Disassembler:
3121 Fixed a problem where a CPU stack overflow fault could occur if a recursive
3122 method call was made from within a Return statement.
3124 ----------------------------------------
3125 02 December 2005. Summary of changes for version 20051202:
3127 1) ACPI CA Core Subsystem:
3129 Modified the parsing of control methods to no longer create namespace
3130 objects during the first pass of the parse. Objects are now created only
3131 during the execute phase, at the moment the namespace creation operator is
3132 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
3133 should eliminate ALREADY_EXISTS exceptions seen on some machines where
3134 reentrant control methods are protected by an AML mutex. The mutex will now
3135 correctly block multiple threads from attempting to create the same object
3138 Increased the number of available Owner Ids for namespace object tracking
3139 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
3140 some machines with a large number of ACPI tables (either static or dynamic).
3142 Fixed a problem with the AcpiExec utility where a fault could occur when the
3143 -b switch (batch mode) is used.
3145 Enhanced the namespace dump routine to output the owner ID for each
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: 76.3K Code, 12.3K Data, 88.6K Total
3158 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3160 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3161 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3164 2) iASL Compiler/Disassembler:
3166 Fixed a parse error during compilation of certain Switch/Case constructs. To
3167 simplify the parse, the grammar now allows for multiple Default statements
3168 and this error is now detected and flagged during the analysis phase.
3170 Disassembler: The disassembly now includes the contents of the original
3171 table header within a comment at the start of the file. This includes the
3172 name and version of the original ASL compiler.
3174 ----------------------------------------
3175 17 November 2005. Summary of changes for version 20051117:
3177 1) ACPI CA Core Subsystem:
3179 Fixed a problem in the AML parser where the method thread count could be
3180 decremented below zero if any errors occurred during the method parse phase.
3181 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
3182 This also fixed a related regression with the mechanism that detects and
3183 corrects methods that cannot properly handle reentrancy (related to the
3184 deployment of the new OwnerId mechanism.)
3186 Eliminated the pre-parsing of control methods (to detect errors) during
3187 table load. Related to the problem above, this was causing unwind issues if
3188 any errors occurred during the parse, and it seemed to be overkill. A table
3189 load should not be aborted if there are problems with any single control
3190 method, thus rendering this feature rather pointless.
3192 Fixed a problem with the new table-driven resource manager where an internal
3193 buffer overflow could occur for small resource templates.
3195 Implemented a new external interface, AcpiGetVendorResource. This interface
3196 will find and return a vendor-defined resource descriptor within a _CRS or
3197 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
3199 Removed the length limit (200) on string objects as per the upcoming ACPI
3200 3.0A specification. This affects the following areas of the interpreter: 1)
3201 any implicit conversion of a Buffer to a String, 2) a String object result
3202 of the ASL Concatentate operator, 3) the String object result of the ASL
3205 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
3206 on a semaphore object would incorrectly timeout. This allows the
3207 multithreading features of the AcpiExec utility to work properly under
3210 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
3211 the recently added file named "utresrc.c".
3213 Code and Data Size: The current and previous library sizes for the core
3214 subsystem are shown below. These are the code and data sizes for the
3215 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3216 values do not include any ACPI driver or OSPM code. The debug version of the
3217 code includes the debug output trace mechanism and has a much larger code
3218 and data size. Note that these values will vary depending on the efficiency
3219 of the compiler and the compiler options used during generation.
3222 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3223 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3225 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3226 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3229 2) iASL Compiler/Disassembler:
3231 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
3232 specification. For the iASL compiler, this means that string literals within
3233 the source ASL can be of any length.
3235 Enhanced the listing output to dump the AML code for resource descriptors
3236 immediately after the ASL code for each descriptor, instead of in a block at
3237 the end of the entire resource template.
3239 Enhanced the compiler debug output to dump the entire original parse tree
3240 constructed during the parse phase, before any transforms are applied to the
3241 tree. The transformed tree is dumped also.
3243 ----------------------------------------
3244 02 November 2005. Summary of changes for version 20051102:
3246 1) ACPI CA Core Subsystem:
3248 Modified the subsystem initialization sequence to improve GPE support. The
3249 GPE initialization has been split into two parts in order to defer execution
3250 of the _PRW methods (Power Resources for Wake) until after the hardware is
3251 fully initialized and the SCI handler is installed. This allows the _PRW
3252 methods to access fields protected by the Global Lock. This will fix systems
3253 where a NO_GLOBAL_LOCK exception has been seen during initialization.
3255 Converted the ACPI internal object disassemble and display code within the
3256 AML debugger to fully table-driven operation, reducing code size and
3257 increasing maintainability.
3259 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
3260 in the 20051021 release.
3262 Implemented support for "local" internal ACPI object types within the
3263 debugger "Object" command and the AcpiWalkNamespace external interfaces.
3264 These local types include RegionFields, BankFields, IndexFields, Alias, and
3267 Moved common AML resource handling code into a new file, "utresrc.c". This
3268 code is shared by both the Resource Manager and the AML Debugger.
3270 Code and Data Size: The current and previous library sizes for the core
3271 subsystem are shown below. These are the code and data sizes for the
3272 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3273 values do not include any ACPI driver or OSPM code. The debug version of the
3274 code includes the debug output trace mechanism and has a much larger code
3275 and data size. Note that these values will vary depending on the efficiency
3276 of the compiler and the compiler options used during generation.
3279 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3280 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3282 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3283 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3286 2) iASL Compiler/Disassembler:
3288 Fixed a problem with very large initializer lists (more than 4000 elements)
3289 for both Buffer and Package objects where the parse stack could overflow.
3291 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
3292 characters within comment fields. The scan is now always performed and is no
3293 longer optional, detecting invalid characters within a source file
3294 immediately rather than during the parse phase or later.
3296 Enhanced the ASL grammar definition to force early reductions on all list-
3297 style grammar elements so that the overall parse stack usage is greatly
3298 reduced. This should improve performance and reduce the possibility of parse
3301 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
3302 with the addition of a %expected statement, the compiler generates from
3303 source with no warnings.
3305 Fixed a possible segment fault in the disassembler if the input filename
3306 does not contain a "dot" extension (Thomas Renninger).
3308 ----------------------------------------
3309 21 October 2005. Summary of changes for version 20051021:
3311 1) ACPI CA Core Subsystem:
3313 Implemented support for the EM64T and other x86-64 processors. This
3314 essentially entails recognizing that these processors support non-aligned
3315 memory transfers. Previously, all 64-bit processors were assumed to lack
3316 hardware support for non-aligned transfers.
3318 Completed conversion of the Resource Manager to nearly full table-driven
3319 operation. Specifically, the resource conversion code (convert AML to
3320 internal format and the reverse) and the debug code to dump internal
3321 resource descriptors are fully table-driven, reducing code and data size and
3322 improving maintainability.
3324 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
3325 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
3326 Alexey Starikovskiy)
3328 Implemented support within the resource conversion code for the Type-
3329 Specific byte within the various ACPI 3.0 *WordSpace macros.
3331 Fixed some issues within the resource conversion code for the type-specific
3332 flags for both Memory and I/O address resource descriptors. For Memory,
3333 implemented support for the MTP and TTP flags. For I/O, split the TRS and
3334 TTP flags into two separate fields.
3336 Code and Data Size: The current and previous library sizes for the core
3337 subsystem are shown below. These are the code and data sizes for the
3338 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3339 values do not include any ACPI driver or OSPM code. The debug version of the
3340 code includes the debug output trace mechanism and has a much larger code
3341 and data size. Note that these values will vary depending on the efficiency
3342 of the compiler and the compiler options used during generation.
3345 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3346 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3348 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3349 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3353 2) iASL Compiler/Disassembler:
3355 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
3356 corresponding ResourceSource string was not also present in a resource
3357 descriptor declaration. This restriction caused problems with existing
3358 AML/ASL code that includes the Index byte without the string. When such AML
3359 was disassembled, it could not be compiled without modification. Further,
3360 the modified code created a resource template with a different size than the
3361 original, breaking code that used fixed offsets into the resource template
3364 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
3365 byte. This byte is now emitted if present so that the exact AML can be
3366 reproduced when the disassembled code is recompiled.
3368 Improved comments and text alignment for the resource descriptor code
3369 emitted by the disassembler.
3371 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
3372 Register() resource descriptor.
3374 ----------------------------------------
3375 30 September 2005. Summary of changes for version 20050930:
3377 1) ACPI CA Core Subsystem:
3379 Completed a major overhaul of the Resource Manager code - specifically,
3380 optimizations in the area of the AML/internal resource conversion code. The
3381 code has been optimized to simplify and eliminate duplicated code, CPU stack
3382 use has been decreased by optimizing function parameters and local
3383 variables, and naming conventions across the manager have been standardized
3384 for clarity and ease of maintenance (this includes function, parameter,
3385 variable, and struct/typedef names.) The update may force changes in some
3386 driver code, depending on how resources are handled by the host OS.
3388 All Resource Manager dispatch and information tables have been moved to a
3389 single location for clarity and ease of maintenance. One new file was
3390 created, named "rsinfo.c".
3392 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
3393 guarantee that the argument is not evaluated twice, making them less prone
3394 to macro side-effects. However, since there exists the possibility of
3395 additional stack use if a particular compiler cannot optimize them (such as
3396 in the debug generation case), the original macros are optionally available.
3397 Note that some invocations of the return_VALUE macro may now cause size
3398 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
3399 eliminate these. (From Randy Dunlap)
3401 Implemented a new mechanism to enable debug tracing for individual control
3402 methods. A new external interface, AcpiDebugTrace, is provided to enable
3403 this mechanism. The intent is to allow the host OS to easily enable and
3404 disable tracing for problematic control methods. This interface can be
3405 easily exposed to a user or debugger interface if desired. See the file
3406 psxface.c for details.
3408 AcpiUtCallocate will now return a valid pointer if a length of zero is
3409 specified - a length of one is used and a warning is issued. This matches
3410 the behavior of AcpiUtAllocate.
3412 Code and Data Size: The current and previous library sizes for the core
3413 subsystem are shown below. These are the code and data sizes for the
3414 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3415 values do not include any ACPI driver or OSPM code. The debug version of the
3416 code includes the debug output trace mechanism and has a much larger code
3417 and data size. Note that these values will vary depending on the efficiency
3418 of the compiler and the compiler options used during generation.
3421 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3422 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3424 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3425 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3428 2) iASL Compiler/Disassembler:
3430 A remark is issued if the effective compile-time length of a package or
3431 buffer is zero. Previously, this was a warning.
3433 ----------------------------------------
3434 16 September 2005. Summary of changes for version 20050916:
3436 1) ACPI CA Core Subsystem:
3438 Fixed a problem within the Resource Manager where support for the Generic
3439 Register descriptor was not fully implemented. This descriptor is now fully
3440 recognized, parsed, disassembled, and displayed.
3442 Completely restructured the Resource Manager code to utilize table-driven
3443 dispatch and lookup, eliminating many of the large switch() statements. This
3444 reduces overall subsystem code size and code complexity. Affects the
3445 resource parsing and construction, disassembly, and debug dump output.
3447 Cleaned up and restructured the debug dump output for all resource
3448 descriptors. Improved readability of the output and reduced code size.
3450 Fixed a problem where changes to internal data structures caused the
3451 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
3453 Code and Data Size: The current and previous library sizes for the core
3454 subsystem are shown below. These are the code and data sizes for the
3455 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3456 values do not include any ACPI driver or OSPM code. The debug version of the
3457 code includes the debug output trace mechanism and has a much larger code
3458 and data size. Note that these values will vary depending on the efficiency
3459 of the compiler and the compiler options used during generation.
3462 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3463 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3465 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3466 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3469 2) iASL Compiler/Disassembler:
3471 Updated the disassembler to automatically insert an EndDependentFn() macro
3472 into the ASL stream if this macro is missing in the original AML code,
3473 simplifying compilation of the resulting ASL module.
3475 Fixed a problem in the disassembler where a disassembled ResourceSource
3476 string (within a large resource descriptor) was not surrounded by quotes and
3477 not followed by a comma, causing errors when the resulting ASL module was
3478 compiled. Also, escape sequences within a ResourceSource string are now
3479 handled correctly (especially "\\")
3481 ----------------------------------------
3482 02 September 2005. Summary of changes for version 20050902:
3484 1) ACPI CA Core Subsystem:
3486 Fixed a problem with the internal Owner ID allocation and deallocation
3487 mechanisms for control method execution and recursive method invocation.
3488 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
3489 messages seen on some systems. Recursive method invocation depth is
3490 currently limited to 255. (Alexey Starikovskiy)
3492 Completely eliminated all vestiges of support for the "module-level
3493 executable code" until this support is fully implemented and debugged. This
3494 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
3495 some systems that invoke this support.
3497 Fixed a problem within the resource manager code where the transaction flags
3498 for a 64-bit address descriptor were handled incorrectly in the type-
3501 Consolidated duplicate code within the address descriptor resource manager
3502 code, reducing overall subsystem code size.
3504 Fixed a fault when using the AML debugger "disassemble" command to
3505 disassemble individual control methods.
3507 Removed references to the "release_current" directory within the Unix
3510 Code and Data Size: The current and previous core subsystem library sizes
3511 are shown below. These are the code and data sizes for the acpica.lib
3512 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
3513 include any ACPI driver or OSPM code. The debug version of the code includes
3514 the debug output trace mechanism and has a much larger code and data size.
3515 Note that these values will vary depending on the efficiency of the compiler
3516 and the compiler options used during generation.
3519 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3520 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3522 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3523 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3526 2) iASL Compiler/Disassembler:
3528 Implemented an error check for illegal duplicate values in the interrupt and
3529 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
3532 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
3533 too many values in the interrupt list (16 max) and invalid values in the
3536 The maximum length string literal within an ASL file is now restricted to
3537 200 characters as per the ACPI specification.
3539 Fixed a fault when using the -ln option (generate namespace listing).
3541 Implemented an error check to determine if a DescriptorName within a
3542 resource descriptor has already been used within the current scope.
3544 ----------------------------------------
3545 15 August 2005. Summary of changes for version 20050815:
3547 1) ACPI CA Core Subsystem:
3549 Implemented a full bytewise compare to determine if a table load request is
3550 attempting to load a duplicate table. The compare is performed if the table
3551 signatures and table lengths match. This will allow different tables with
3552 the same OEM Table ID and revision to be loaded - probably against the ACPI
3553 specification, but discovered in the field nonetheless.
3555 Added the changes.txt logfile to each of the zipped release packages.
3557 Code and Data Size: Current and previous core subsystem library sizes are
3558 shown below. These are the code and data sizes for the acpica.lib produced
3559 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3560 any ACPI driver or OSPM code. The debug version of the code includes the
3561 debug output trace mechanism and has a much larger code and data size. Note
3562 that these values will vary depending on the efficiency of the compiler and
3563 the compiler options used during generation.
3566 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3567 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3569 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3570 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3573 2) iASL Compiler/Disassembler:
3575 Fixed a problem where incorrect AML code could be generated for Package
3576 objects if optimization is disabled (via the -oa switch).
3578 Fixed a problem with where incorrect AML code is generated for variable-
3579 length packages when the package length is not specified and the number of
3580 initializer values is greater than 255.
3583 ----------------------------------------
3584 29 July 2005. Summary of changes for version 20050729:
3586 1) ACPI CA Core Subsystem:
3588 Implemented support to ignore an attempt to install/load a particular ACPI
3589 table more than once. Apparently there exists BIOS code that repeatedly
3590 attempts to load the same SSDT upon certain events. With assistance from
3591 Venkatesh Pallipadi.
3593 Restructured the main interface to the AML parser in order to correctly
3594 handle all exceptional conditions. This will prevent leakage of the OwnerId
3595 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
3596 machines. With assistance from Alexey Starikovskiy.
3598 Support for "module level code" has been disabled in this version due to a
3599 number of issues that have appeared on various machines. The support can be
3600 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
3601 compilation. When the issues are fully resolved, the code will be enabled by
3604 Modified the internal functions for debug print support to define the
3605 FunctionName parameter as a (const char *) for compatibility with compiler
3606 built-in macros such as __FUNCTION__, etc.
3608 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
3610 Implemented support to display an object count summary for the AML Debugger
3611 commands Object and Methods.
3613 Code and Data Size: Current and previous core subsystem library sizes are
3614 shown below. These are the code and data sizes for the acpica.lib produced
3615 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3616 any ACPI driver or OSPM code. The debug version of the code includes the
3617 debug output trace mechanism and has a much larger code and data size. Note
3618 that these values will vary depending on the efficiency of the compiler and
3619 the compiler options used during generation.
3622 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3623 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3625 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3626 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3629 2) iASL Compiler/Disassembler:
3631 Fixed a regression that appeared in the 20050708 version of the compiler
3632 where an error message was inadvertently emitted for invocations of the _OSI
3633 reserved control method.
3635 ----------------------------------------
3636 08 July 2005. Summary of changes for version 20050708:
3638 1) ACPI CA Core Subsystem:
3640 The use of the CPU stack in the debug version of the subsystem has been
3641 considerably reduced. Previously, a debug structure was declared in every
3642 function that used the debug macros. This structure has been removed in
3643 favor of declaring the individual elements as parameters to the debug
3644 functions. This reduces the cumulative stack use during nested execution of
3645 ACPI function calls at the cost of a small increase in the code size of the
3646 debug version of the subsystem. With assistance from Alexey Starikovskiy and
3649 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
3650 headers to define a macro that will return the current function name at
3651 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
3652 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
3653 compiler-dependent header, the function name is saved on the CPU stack (one
3654 pointer per function.) This mechanism is used because apparently there
3655 exists no standard ANSI-C defined macro that that returns the function name.
3657 Redesigned and reimplemented the "Owner ID" mechanism used to track
3658 namespace objects created/deleted by ACPI tables and control method
3659 execution. A bitmap is now used to allocate and free the IDs, thus solving
3660 the wraparound problem present in the previous implementation. The size of
3661 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
3664 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
3665 flag definitions within the headers for the predefined ACPI tables. These
3666 have been replaced by UINT8_BIT in order to increase the code portability of
3667 the subsystem. If the use of UINT8 remains a problem, we may be forced to
3668 eliminate bitfields entirely because of a lack of portability.
3670 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
3671 is a frequently used function and this improvement increases the performance
3672 of the entire subsystem (Alexey Starikovskiy).
3674 Fixed several possible memory leaks and the inverse - premature object
3675 deletion (Alexey Starikovskiy).
3677 Code and Data Size: Current and previous core subsystem library sizes are
3678 shown below. These are the code and data sizes for the acpica.lib produced
3679 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3680 any ACPI driver or OSPM code. The debug version of the code includes the
3681 debug output trace mechanism and has a much larger code and data size. Note
3682 that these values will vary depending on the efficiency of the compiler and
3683 the compiler options used during generation.
3686 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3687 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3689 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3690 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3692 ----------------------------------------
3693 24 June 2005. Summary of changes for version 20050624:
3695 1) ACPI CA Core Subsystem:
3697 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
3698 the host-defined cache object. This allows the OSL implementation to define
3699 and type this object in any manner desired, simplifying the OSL
3700 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
3701 Linux, and should be defined in the OS-specific header file for other
3702 operating systems as required.
3704 Changed the interface to AcpiOsAcquireObject to directly return the
3705 requested object as the function return (instead of ACPI_STATUS.) This
3706 change was made for performance reasons, since this is the purpose of the
3707 interface in the first place. AcpiOsAcquireObject is now similar to the
3708 AcpiOsAllocate interface.
3710 Implemented a new AML debugger command named Businfo. This command displays
3711 information about all devices that have an associate _PRT object. The _ADR,
3712 _HID, _UID, and _CID are displayed for these devices.
3714 Modified the initialization sequence in AcpiInitializeSubsystem to call the
3715 OSL interface AcpiOslInitialize first, before any local initialization. This
3716 change was required because the global initialization now calls OSL
3719 Enhanced the Dump command to display the entire contents of Package objects
3720 (including all sub-objects and their values.)
3722 Restructured the code base to split some files because of size and/or
3723 because the code logically belonged in a separate file. New files are listed
3724 below. All makefiles and project files included in the ACPI CA release have
3726 utilities/utcache.c /* Local cache interfaces */
3727 utilities/utmutex.c /* Local mutex support */
3728 utilities/utstate.c /* State object support */
3729 interpreter/parser/psloop.c /* Main AML parse loop */
3731 Code and Data Size: Current and previous core subsystem library sizes are
3732 shown below. These are the code and data sizes for the acpica.lib produced
3733 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3734 any ACPI driver or OSPM code. The debug version of the code includes the
3735 debug output trace mechanism and has a much larger code and data size. Note
3736 that these values will vary depending on the efficiency of the compiler and
3737 the compiler options used during generation.
3740 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3741 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3743 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3744 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3747 2) iASL Compiler/Disassembler:
3749 Fixed a regression introduced in version 20050513 where the use of a Package
3750 object within a Case() statement caused a compile time exception. The
3751 original behavior has been restored (a Match() operator is emitted.)
3753 ----------------------------------------
3754 17 June 2005. Summary of changes for version 20050617:
3756 1) ACPI CA Core Subsystem:
3758 Moved the object cache operations into the OS interface layer (OSL) to allow
3759 the host OS to handle these operations if desired (for example, the Linux
3760 OSL will invoke the slab allocator). This support is optional; the compile
3761 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
3762 code in the ACPI CA core. The new OSL interfaces are shown below. See
3763 utalloc.c for an example implementation, and acpiosxf.h for the exact
3764 interface definitions. With assistance from Alexey Starikovskiy.
3771 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
3772 and restore a flags parameter. This fits better with many OS lock models.
3773 Note: the current execution state (interrupt handler or not) is no longer
3774 passed to these interfaces. If necessary, the OSL must determine this state
3775 by itself, a simple and fast operation. With assistance from Alexey
3778 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
3779 present if the revision of the RSDP was 2 or greater. According to the ACPI
3780 specification, the XSDT is optional in all cases, and the table manager
3781 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
3782 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
3785 Fixed an interpreter problem with the Mid() operator in the case of an input
3786 string where the resulting output string is of zero length. It now correctly
3787 returns a valid, null terminated string object instead of a string object
3788 with a null pointer.
3790 Fixed a problem with the control method argument handling to allow a store
3791 to an Arg object that already contains an object of type Device. The Device
3792 object is now correctly overwritten. Previously, an error was returned.
3795 Enhanced the debugger Find command to emit object values in addition to the
3796 found object pathnames. The output format is the same as the dump namespace
3799 Enhanced the debugger Set command. It now has the ability to set the value
3800 of any Named integer object in the namespace (Previously, only method locals
3801 and args could be set.)
3803 Code and Data Size: Current and previous core subsystem library sizes are
3804 shown below. These are the code and data sizes for the acpica.lib produced
3805 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3806 any ACPI driver or OSPM code. The debug version of the code includes the
3807 debug output trace mechanism and has a much larger code and data size. Note
3808 that these values will vary depending on the efficiency of the compiler and
3809 the compiler options used during generation.
3812 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3813 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3815 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3816 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3819 2) iASL Compiler/Disassembler:
3821 Fixed a regression in the disassembler where if/else/while constructs were
3822 output incorrectly. This problem was introduced in the previous release
3823 (20050526). This problem also affected the single-step disassembly in the
3826 Fixed a problem where compiling the reserved _OSI method would randomly (but
3827 rarely) produce compile errors.
3829 Enhanced the disassembler to emit compilable code in the face of incorrect
3830 AML resource descriptors. If the optional ResourceSourceIndex is present,
3831 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
3832 disassembly. Otherwise, the resulting code cannot be compiled without
3835 ----------------------------------------
3836 26 May 2005. Summary of changes for version 20050526:
3838 1) ACPI CA Core Subsystem:
3840 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
3841 the module level (not within a control method.) These opcodes are executed
3842 exactly once at the time the table is loaded. This type of code was legal up
3843 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
3844 order to provide backwards compatibility with earlier BIOS implementations.
3845 This eliminates the "Encountered executable code at module level" warning
3846 that was previously generated upon detection of such code.
3848 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
3849 inadvertently be generated during the lookup of namespace objects in the
3850 second pass parse of ACPI tables and control methods. It appears that this
3851 problem could occur during the resolution of forward references to namespace
3854 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
3855 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
3856 allows the deadlock detection debug code to be compiled out in the normal
3857 case, improving mutex performance (and overall subsystem performance)
3860 Implemented a handful of miscellaneous fixes for possible memory leaks on
3861 error conditions and error handling control paths. These fixes were
3862 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
3864 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
3865 to prevent a fault in this error case.
3867 Code and Data Size: Current and previous core subsystem library sizes are
3868 shown below. These are the code and data sizes for the acpica.lib produced
3869 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3870 any ACPI driver or OSPM code. The debug version of the code includes the
3871 debug output trace mechanism and has a much larger code and data size. Note
3872 that these values will vary depending on the efficiency of the compiler and
3873 the compiler options used during generation.
3876 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3877 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3879 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3880 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3883 2) iASL Compiler/Disassembler:
3885 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
3886 the module level (not within a control method.) These operators will be
3887 executed once at the time the table is loaded. This type of code was legal
3888 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
3889 compiler in order to provide backwards compatibility with earlier BIOS ASL
3892 The ACPI integer width (specified via the table revision ID or the -r
3893 override, 32 or 64 bits) is now used internally during compile-time constant
3894 folding to ensure that constants are truncated to 32 bits if necessary.
3895 Previously, the revision ID value was only emitted in the AML table header.
3897 An error message is now generated for the Mutex and Method operators if the
3898 SyncLevel parameter is outside the legal range of 0 through 15.
3900 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
3901 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
3902 The actual underlying implementation of method argument typechecking is
3903 still under development, however.
3905 ----------------------------------------
3906 13 May 2005. Summary of changes for version 20050513:
3908 1) ACPI CA Core Subsystem:
3910 Implemented support for PCI Express root bridges -- added support for device
3911 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
3913 The interpreter now automatically truncates incoming 64-bit constants to 32
3914 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
3915 also affects the iASL compiler constant folding. (Note: as per below, the
3916 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
3918 Fixed a problem where string and buffer objects with "static" pointers
3919 (pointers to initialization data within an ACPI table) were not handled
3920 consistently. The internal object copy operation now always copies the data
3921 to a newly allocated buffer, regardless of whether the source object is
3924 Fixed a problem with the FromBCD operator where an implicit result
3925 conversion was improperly performed while storing the result to the target
3926 operand. Since this is an "explicit conversion" operator, the implicit
3927 conversion should never be performed on the output.
3929 Fixed a problem with the CopyObject operator where a copy to an existing
3930 named object did not always completely overwrite the existing object stored
3931 at name. Specifically, a buffer-to-buffer copy did not delete the existing
3934 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
3935 structs for consistency.
3937 Code and Data Size: Current and previous core subsystem library sizes are
3938 shown below. These are the code and data sizes for the acpica.lib produced
3939 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3940 any ACPI driver or OSPM code. The debug version of the code includes the
3941 debug output trace mechanism and has a much larger code and data size. Note
3942 that these values will vary depending on the efficiency of the compiler and
3943 the compiler options used during generation.
3946 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3947 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3948 Current Release: (Same sizes)
3949 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3950 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3953 2) iASL Compiler/Disassembler:
3955 The compiler now emits a warning if an attempt is made to generate a 64-bit
3956 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
3957 is truncated to 32 bits.
3959 Fixed a problem with large package objects: if the static length of the
3960 package is greater than 255, the "variable length package" opcode is
3961 emitted. Previously, this caused an error. This requires an update to the
3962 ACPI spec, since it currently (incorrectly) states that packages larger than
3963 255 elements are not allowed.
3965 The disassembler now correctly handles variable length packages and packages
3966 larger than 255 elements.
3968 ----------------------------------------
3969 08 April 2005. Summary of changes for version 20050408:
3971 1) ACPI CA Core Subsystem:
3973 Fixed three cases in the interpreter where an "index" argument to an ASL
3974 function was still (internally) 32 bits instead of the required 64 bits.
3975 This was the Index argument to the Index, Mid, and Match operators.
3977 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
3978 not a POSIX-defined function and not present in most kernel-level C
3979 libraries. All references to the C library strupr function have been removed
3982 Completed the deployment of static functions/prototypes. All prototypes with
3983 the static attribute have been moved from the headers to the owning C file.
3985 Implemented an extract option (-e) for the AcpiBin utility (AML binary
3986 utility). This option allows the utility to extract individual ACPI tables
3987 from the output of AcpiDmp. It provides the same functionality of the
3988 acpixtract.pl perl script without the worry of setting the correct perl
3989 options. AcpiBin runs on Windows and has not yet been generated/validated in
3990 the Linux/Unix environment (but should be soon).
3992 Updated and fixed the table dump option for AcpiBin (-d). This option
3993 converts a single ACPI table to a hex/ascii file, similar to the output of
3996 Code and Data Size: Current and previous core subsystem library sizes are
3997 shown below. These are the code and data sizes for the acpica.lib produced
3998 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3999 any ACPI driver or OSPM code. The debug version of the code includes the
4000 debug output trace mechanism and has a much larger code and data size. Note
4001 that these values will vary depending on the efficiency of the compiler and
4002 the compiler options used during generation.
4005 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4006 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4008 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4009 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4012 2) iASL Compiler/Disassembler:
4014 Disassembler fix: Added a check to ensure that the table length found in the
4015 ACPI table header within the input file is not longer than the actual input
4016 file size. This indicates some kind of file or table corruption.
4018 ----------------------------------------
4019 29 March 2005. Summary of changes for version 20050329:
4021 1) ACPI CA Core Subsystem:
4023 An error is now generated if an attempt is made to create a Buffer Field of
4024 length zero (A CreateField with a length operand of zero.)
4026 The interpreter now issues a warning whenever executable code at the module
4027 level is detected during ACPI table load. This will give some idea of the
4028 prevalence of this type of code.
4030 Implemented support for references to named objects (other than control
4031 methods) within package objects.
4033 Enhanced package object output for the debug object. Package objects are now
4034 completely dumped, showing all elements.
4036 Enhanced miscellaneous object output for the debug object. Any object can
4037 now be written to the debug object (for example, a device object can be
4038 written, and the type of the object will be displayed.)
4040 The "static" qualifier has been added to all local functions across both the
4041 core subsystem and the iASL compiler.
4043 The number of "long" lines (> 80 chars) within the source has been
4044 significantly reduced, by about 1/3.
4046 Cleaned up all header files to ensure that all CA/iASL functions are
4047 prototyped (even static functions) and the formatting is consistent.
4049 Two new header files have been added, acopcode.h and acnames.h.
4051 Removed several obsolete functions that were no longer used.
4053 Code and Data Size: Current and previous core subsystem library sizes are
4054 shown below. These are the code and data sizes for the acpica.lib produced
4055 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4056 any ACPI driver or OSPM code. The debug version of the code includes the
4057 debug output trace mechanism and has a much larger code and data size. Note
4058 that these values will vary depending on the efficiency of the compiler and
4059 the compiler options used during generation.
4062 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4063 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4065 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4066 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4070 2) iASL Compiler/Disassembler:
4072 Fixed a problem with the resource descriptor generation/support. For the
4073 ResourceSourceIndex and the ResourceSource fields, both must be present, or
4074 both must be not present - can't have one without the other.
4076 The compiler now returns non-zero from the main procedure if any errors have
4077 occurred during the compilation.
4080 ----------------------------------------
4081 09 March 2005. Summary of changes for version 20050309:
4083 1) ACPI CA Core Subsystem:
4085 The string-to-buffer implicit conversion code has been modified again after
4086 a change to the ACPI specification. In order to match the behavior of the
4087 other major ACPI implementation, the target buffer is no longer truncated if
4088 the source string is smaller than an existing target buffer. This change
4089 requires an update to the ACPI spec, and should eliminate the recent
4090 AE_AML_BUFFER_LIMIT issues.
4092 The "implicit return" support was rewritten to a new algorithm that solves
4093 the general case. Rather than attempt to determine when a method is about to
4094 exit, the result of every ASL operator is saved momentarily until the very
4095 next ASL operator is executed. Therefore, no matter how the method exits,
4096 there will always be a saved implicit return value. This feature is only
4097 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
4098 AE_AML_NO_RETURN_VALUE errors when enabled.
4100 Implemented implicit conversion support for the predicate (operand) of the
4101 If, Else, and While operators. String and Buffer arguments are automatically
4102 converted to Integers.
4104 Changed the string-to-integer conversion behavior to match the new ACPI
4105 errata: "If no integer object exists, a new integer is created. The ASCII
4106 string is interpreted as a hexadecimal constant. Each string character is
4107 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
4108 with the first character as the most significant digit, and ending with the
4109 first non-hexadecimal character or end-of-string." This means that the first
4110 non-hex character terminates the conversion and this is the code that was
4113 Fixed a problem where the ObjectType operator would fail (fault) when used
4114 on an Index of a Package which pointed to a null package element. The
4115 operator now properly returns zero (Uninitialized) in this case.
4117 Fixed a problem where the While operator used excessive memory by not
4118 properly popping the result stack during execution. There was no memory leak
4119 after execution, however. (Code provided by Valery Podrezov.)
4121 Fixed a problem where references to control methods within Package objects
4122 caused the method to be invoked, instead of producing a reference object
4123 pointing to the method.
4125 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
4126 improve performance and reduce code size. (Code provided by Alexey
4129 Code and Data Size: Current and previous core subsystem library sizes are
4130 shown below. These are the code and data sizes for the acpica.lib produced
4131 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4132 any ACPI driver or OSPM code. The debug version of the code includes the
4133 debug output trace mechanism and has a much larger code and data size. Note
4134 that these values will vary depending on the efficiency of the compiler and
4135 the compiler options used during generation.
4138 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4139 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4141 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4142 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4145 2) iASL Compiler/Disassembler:
4147 Fixed a problem with the Return operator with no arguments. Since the AML
4148 grammar for the byte encoding requires an operand for the Return opcode, the
4149 compiler now emits a Return(Zero) for this case. An ACPI specification
4150 update has been written for this case.
4152 For tables other than the DSDT, namepath optimization is automatically
4153 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
4154 compiler has no knowledge of where, and thus cannot optimize namepaths.
4156 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
4157 inadvertently omitted from the ACPI specification, and will require an
4160 The source file scan for ASCII characters is now optional (-a). This change
4161 was made because some vendors place non-ascii characters within comments.
4162 However, the scan is simply a brute-force byte compare to ensure all
4163 characters in the file are in the range 0x00 to 0x7F.
4165 Fixed a problem with the CondRefOf operator where the compiler was
4166 inappropriately checking for the existence of the target. Since the point of
4167 the operator is to check for the existence of the target at run-time, the
4168 compiler no longer checks for the target existence.
4170 Fixed a problem where errors generated from the internal AML interpreter
4171 during constant folding were not handled properly, causing a fault.
4173 Fixed a problem with overly aggressive range checking for the Stall
4174 operator. The valid range (max 255) is now only checked if the operand is of
4175 type Integer. All other operand types cannot be statically checked.
4177 Fixed a problem where control method references within the RefOf, DeRefOf,
4178 and ObjectType operators were not treated properly. They are now treated as
4179 actual references, not method invocations.
4181 Fixed and enhanced the "list namespace" option (-ln). This option was broken
4182 a number of releases ago.
4184 Improved error handling for the Field, IndexField, and BankField operators.
4185 The compiler now cleanly reports and recovers from errors in the field
4186 component (FieldUnit) list.
4188 Fixed a disassembler problem where the optional ResourceDescriptor fields
4189 TRS and TTP were not always handled correctly.
4191 Disassembler - Comments in output now use "//" instead of "/*"
4193 ----------------------------------------
4194 28 February 2005. Summary of changes for version 20050228:
4196 1) ACPI CA Core Subsystem:
4198 Fixed a problem where the result of an Index() operator (an object
4199 reference) must increment the reference count on the target object for the
4200 life of the object reference.
4202 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
4203 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
4204 resource descriptors.
4206 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
4207 Space Descriptor" string, indicating interpreter support for the descriptors
4210 Implemented header support for the new ACPI 3.0 FADT flag bits.
4212 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
4213 status/enable registers.
4215 Updated header support for the MADT processor local Apic struct and MADT
4216 platform interrupt source struct for new ACPI 3.0 fields.
4218 Implemented header support for the SRAT and SLIT ACPI tables.
4220 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
4223 Code and Data Size: Current and previous core subsystem library sizes are
4224 shown below. These are the code and data sizes for the acpica.lib produced
4225 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4226 any ACPI driver or OSPM code. The debug version of the code includes the
4227 debug output trace mechanism and has a much larger code and data size. Note
4228 that these values will vary depending on the efficiency of the compiler and
4229 the compiler options used during generation.
4232 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4233 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4235 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4236 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4239 2) iASL Compiler/Disassembler:
4241 Fixed a problem with the internal 64-bit String-to-integer conversion with
4242 strings less than two characters long.
4244 Fixed a problem with constant folding where the result of the Index()
4245 operator can not be considered a constant. This means that Index() cannot be
4246 a type3 opcode and this will require an update to the ACPI specification.
4248 Disassembler: Implemented support for the TTP, MTP, and TRS resource
4249 descriptor fields. These fields were inadvertently ignored and not output in
4250 the disassembly of the resource descriptor.
4253 ----------------------------------------
4254 11 February 2005. Summary of changes for version 20050211:
4256 1) ACPI CA Core Subsystem:
4258 Implemented ACPI 3.0 support for implicit conversion within the Match()
4259 operator. MatchObjects can now be of type integer, buffer, or string instead
4260 of just type integer. Package elements are implicitly converted to the type
4261 of the MatchObject. This change aligns the behavior of Match() with the
4262 behavior of the other logical operators (LLess(), etc.) It also requires an
4263 errata change to the ACPI specification as this support was intended for
4264 ACPI 3.0, but was inadvertently omitted.
4266 Fixed a problem with the internal implicit "to buffer" conversion. Strings
4267 that are converted to buffers will cause buffer truncation if the string is
4268 smaller than the target buffer. Integers that are converted to buffers will
4269 not cause buffer truncation, only zero extension (both as per the ACPI
4270 spec.) The problem was introduced when code was added to truncate the
4271 buffer, but this should not be performed in all cases, only the string case.
4273 Fixed a problem with the Buffer and Package operators where the interpreter
4274 would get confused if two such operators were used as operands to an ASL
4275 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
4276 stack was not being popped after the execution of these operators, resulting
4277 in an AE_NO_RETURN_VALUE exception.
4279 Fixed a problem with constructs of the form Store(Index(...),...). The
4280 reference object returned from Index was inadvertently resolved to an actual
4281 value. This problem was introduced in version 20050114 when the behavior of
4282 Store() was modified to restrict the object types that can be used as the
4283 source operand (to match the ACPI specification.)
4285 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
4287 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
4289 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
4291 Code and Data Size: Current and previous core subsystem library sizes are
4292 shown below. These are the code and data sizes for the acpica.lib produced
4293 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4294 any ACPI driver or OSPM code. The debug version of the code includes the
4295 debug output trace mechanism and has a much larger code and data size. Note
4296 that these values will vary depending on the efficiency of the compiler and
4297 the compiler options used during generation.
4300 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4301 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4303 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4304 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4307 2) iASL Compiler/Disassembler:
4309 Fixed a code generation problem in the constant folding optimization code
4310 where incorrect code was generated if a constant was reduced to a buffer
4311 object (i.e., a reduced type 5 opcode.)
4313 Fixed a typechecking problem for the ToBuffer operator. Caused by an
4314 incorrect return type in the internal opcode information table.
4316 ----------------------------------------
4317 25 January 2005. Summary of changes for version 20050125:
4319 1) ACPI CA Core Subsystem:
4321 Fixed a recently introduced problem with the Global Lock where the
4322 underlying semaphore was not created. This problem was introduced in
4323 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
4324 Acquire() operation on _GL.
4326 The local object cache is now optional, and is disabled by default. Both
4327 AcpiExec and the iASL compiler enable the cache because they run in user
4328 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
4329 to enable the local cache.
4331 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
4332 optional "implicit return" support where an error was returned if no return
4333 object was expected, but one was implicitly returned. AE_OK is now returned
4334 in this case and the implicitly returned object is deleted.
4335 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
4336 methods such as _STA and _INI where the return type is known up front.
4338 Fixed a few issues with the internal convert-to-integer code. It now returns
4339 an error if an attempt is made to convert a null string, a string of only
4340 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
4341 and explicit conversion via the ToInteger() operator.
4343 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
4344 not needed for normal operation and should increase the performance of the
4345 entire subsystem. The code remains in case it is needed for debug purposes
4348 The AcpiExec source and makefile are included in the Unix/Linux package for
4351 Code and Data Size: Current and previous core subsystem library sizes are
4352 shown below. These are the code and data sizes for the acpica.lib produced
4353 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4354 any ACPI driver or OSPM code. The debug version of the code includes the
4355 debug output trace mechanism and has a much larger code and data size. Note
4356 that these values will vary depending on the efficiency of the compiler and
4357 the compiler options used during generation.
4360 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4361 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4363 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4364 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4366 2) iASL Compiler/Disassembler:
4368 Switch/Case support: A warning is now issued if the type of the Switch value
4369 cannot be determined at compile time. For example, Switch(Arg0) will
4370 generate the warning, and the type is assumed to be an integer. As per the
4371 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
4374 Switch/Case support: Implemented support for buffer and string objects as
4375 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
4376 buffers and strings.
4378 Switch/Case support: The emitted code for the LEqual() comparisons now uses
4379 the switch value as the first operand, not the second. The case value is now
4380 the second operand, and this allows the case value to be implicitly
4381 converted to the type of the switch value, not the other way around.
4383 Switch/Case support: Temporary variables are now emitted immediately within
4384 the control method, not at the global level. This means that there are now
4385 36 temps available per-method, not 36 temps per-module as was the case with
4386 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
4388 ----------------------------------------
4389 14 January 2005. Summary of changes for version 20050114:
4391 Added 2005 copyright to all module headers. This affects every module in
4392 the core subsystem, iASL compiler, and the utilities.
4394 1) ACPI CA Core Subsystem:
4396 Fixed an issue with the String-to-Buffer conversion code where the string
4397 null terminator was not included in the buffer after conversion, but there
4398 is existing ASL that assumes the string null terminator is included. This is
4399 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
4400 introduced in the previous version when the code was updated to correctly
4401 set the converted buffer size as per the ACPI specification. The ACPI spec
4402 is ambiguous and will be updated to specify that the null terminator must be
4403 included in the converted buffer. This also affects the ToBuffer() ASL
4406 Fixed a problem with the Mid() ASL/AML operator where it did not work
4407 correctly on Buffer objects. Newly created sub-buffers were not being marked
4411 Fixed a problem in AcpiTbFindTable where incorrect string compares were
4412 performed on the OemId and OemTableId table header fields. These fields are
4413 not null terminated, so strncmp is now used instead of strcmp.
4415 Implemented a restriction on the Store() ASL/AML operator to align the
4416 behavior with the ACPI specification. Previously, any object could be used
4417 as the source operand. Now, the only objects that may be used are Integers,
4418 Buffers, Strings, Packages, Object References, and DDB Handles. If
4419 necessary, the original behavior can be restored by enabling the
4420 EnableInterpreterSlack flag.
4422 Enhanced the optional "implicit return" support to allow an implicit return
4423 value from methods that are invoked externally via the AcpiEvaluateObject
4424 interface. This enables implicit returns from the _STA and _INI methods,
4427 Changed the Revision() ASL/AML operator to return the current version of the
4428 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
4429 the supported ACPI version (This is the function of the _REV method).
4431 Updated the _REV predefined method to return the currently supported version
4434 Implemented batch mode option for the AcpiExec utility (-b).
4436 Code and Data Size: Current and previous core subsystem library sizes are
4437 shown below. These are the code and data sizes for the acpica.lib produced
4438 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4439 any ACPI driver or OSPM code. The debug version of the code includes the
4440 debug output trace mechanism and has a much larger code and data size. Note
4441 that these values will vary depending on the efficiency of the compiler and
4442 the compiler options used during generation.
4445 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4446 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4448 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4449 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4451 ----------------------------------------
4452 10 December 2004. Summary of changes for version 20041210:
4454 ACPI 3.0 support is nearing completion in both the iASL compiler and the
4455 ACPI CA core subsystem.
4457 1) ACPI CA Core Subsystem:
4459 Fixed a problem in the ToDecimalString operator where the resulting string
4460 length was incorrectly calculated. The length is now calculated exactly,
4461 eliminating incorrect AE_STRING_LIMIT exceptions.
4463 Fixed a problem in the ToHexString operator to allow a maximum 200 character
4464 string to be produced.
4466 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
4467 routine where the length of the resulting buffer was not truncated to the
4468 new size (if the target buffer already existed).
4470 Code and Data Size: Current and previous core subsystem library sizes are
4471 shown below. These are the code and data sizes for the acpica.lib produced
4472 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4473 any ACPI driver or OSPM code. The debug version of the code includes the
4474 debug output trace mechanism and has a much larger code and data size. Note
4475 that these values will vary depending on the efficiency of the compiler and
4476 the compiler options used during generation.
4479 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4480 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4482 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4483 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4486 2) iASL Compiler/Disassembler:
4488 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
4489 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
4490 Includes support in the disassembler.
4492 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
4495 Fixed a problem where the _HE resource name for the Interrupt macro was
4496 referencing bit 0 instead of bit 1.
4498 Implemented check for maximum 255 interrupts in the Interrupt macro.
4500 Fixed a problem with the predefined resource descriptor names where
4501 incorrect AML code was generated if the offset within the resource buffer
4502 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
4503 but did not update the surrounding package lengths.
4505 Changes to the Dma macro: All channels within the channel list must be in
4506 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
4507 optional (default is BusMaster).
4509 Implemented check for maximum 7 data bytes for the VendorShort macro.
4511 The ReadWrite parameter is now optional for the Memory32 and similar macros.
4513 ----------------------------------------
4514 03 December 2004. Summary of changes for version 20041203:
4516 1) ACPI CA Core Subsystem:
4518 The low-level field insertion/extraction code (exfldio) has been completely
4519 rewritten to eliminate unnecessary complexity, bugs, and boundary
4522 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
4523 operators where the input operand could be inadvertently deleted if no
4524 conversion was necessary (e.g., if the input to ToInteger was an Integer
4527 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
4528 exception code was returned if the resulting string would be > 200 chars.
4529 AE_STRING_LIMIT is now returned.
4531 Fixed a problem with the Concatenate operator where AE_OK was always
4532 returned, even if the operation failed.
4534 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
4535 semaphores to be allocated.
4537 Code and Data Size: Current and previous core subsystem library sizes are
4538 shown below. These are the code and data sizes for the acpica.lib produced
4539 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4540 any ACPI driver or OSPM code. The debug version of the code includes the
4541 debug output trace mechanism and has a much larger code and data size. Note
4542 that these values will vary depending on the efficiency of the compiler and
4543 the compiler options used during generation.
4546 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4547 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4549 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4550 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4553 2) iASL Compiler/Disassembler:
4555 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
4556 recently introduced in 20041119.
4558 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
4559 byte was inadvertently set to zero.
4561 ----------------------------------------
4562 19 November 2004. Summary of changes for version 20041119:
4564 1) ACPI CA Core Subsystem:
4566 Fixed a problem in the internal ConvertToInteger routine where new integers
4567 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
4568 buffers and strings to integers.
4570 Implemented support to store a value to an Index() on a String object. This
4571 is an ACPI 2.0 feature that had not yet been implemented.
4573 Implemented new behavior for storing objects to individual package elements
4574 (via the Index() operator). The previous behavior was to invoke the implicit
4575 conversion rules if an object was already present at the index. The new
4576 behavior is to simply delete any existing object and directly store the new
4577 object. Although the ACPI specification seems unclear on this subject, other
4578 ACPI implementations behave in this manner. (This is the root of the
4579 AE_BAD_HEX_CONSTANT issue.)
4581 Modified the RSDP memory scan mechanism to support the extended checksum for
4582 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
4583 RSDP signature is found with a valid checksum.
4585 Code and Data Size: Current and previous core subsystem library sizes are
4586 shown below. These are the code and data sizes for the acpica.lib produced
4587 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4588 any ACPI driver or OSPM code. The debug version of the code includes the
4589 debug output trace mechanism and has a much larger code and data size. Note
4590 that these values will vary depending on the efficiency of the compiler and
4591 the compiler options used during generation.
4594 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4595 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4597 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4598 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4601 2) iASL Compiler/Disassembler:
4603 Fixed a missing semicolon in the aslcompiler.y file.
4605 ----------------------------------------
4606 05 November 2004. Summary of changes for version 20041105:
4608 1) ACPI CA Core Subsystem:
4610 Implemented support for FADT revision 2. This was an interim table (between
4611 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
4613 Implemented optional support to allow uninitialized LocalX and ArgX
4614 variables in a control method. The variables are initialized to an Integer
4615 object with a value of zero. This support is enabled by setting the
4616 AcpiGbl_EnableInterpreterSlack flag to TRUE.
4618 Implemented support for Integer objects for the SizeOf operator. Either 4
4619 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
4620 depending on the parent table revision).
4622 Fixed a problem in the implementation of the SizeOf and ObjectType operators
4623 where the operand was resolved to a value too early, causing incorrect
4624 return values for some objects.
4626 Fixed some possible memory leaks during exceptional conditions.
4628 Code and Data Size: Current and previous core subsystem library sizes are
4629 shown below. These are the code and data sizes for the acpica.lib produced
4630 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4631 any ACPI driver or OSPM code. The debug version of the code includes the
4632 debug output trace mechanism and has a much larger code and data size. Note
4633 that these values will vary depending on the efficiency of the compiler and
4634 the compiler options used during generation.
4637 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4638 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4640 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4641 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4644 2) iASL Compiler/Disassembler:
4646 Implemented support for all ACPI 3.0 reserved names and methods.
4648 Implemented all ACPI 3.0 grammar elements in the front-end, including
4649 support for semicolons.
4651 Implemented the ACPI 3.0 Function() and ToUUID() macros
4653 Fixed a problem in the disassembler where a Scope() operator would not be
4654 emitted properly if the target of the scope was in another table.
4656 ----------------------------------------
4657 15 October 2004. Summary of changes for version 20041015:
4659 Note: ACPI CA is currently undergoing an in-depth and complete formal
4660 evaluation to test/verify the following areas. Other suggestions are
4661 welcome. This will result in an increase in the frequency of releases and
4662 the number of bug fixes in the next few months.
4663 - Functional tests for all ASL/AML operators
4664 - All implicit/explicit type conversions
4665 - Bit fields and operation regions
4666 - 64-bit math support and 32-bit-only "truncated" math support
4667 - Exceptional conditions, both compiler and interpreter
4668 - Dynamic object deletion and memory leaks
4669 - ACPI 3.0 support when implemented
4670 - External interfaces to the ACPI subsystem
4673 1) ACPI CA Core Subsystem:
4675 Fixed two alignment issues on 64-bit platforms - within debug statements in
4676 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
4677 field within the non-aligned ACPI generic address structure.
4679 Fixed a problem in the Increment and Decrement operators where incorrect
4680 operand resolution could result in the inadvertent modification of the
4681 original integer when the integer is passed into another method as an
4682 argument and the arg is then incremented/decremented.
4684 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
4685 BCD number were truncated during conversion.
4687 Fixed a problem in the ToDecimal operator where the length of the resulting
4688 string could be set incorrectly too long if the input operand was a Buffer
4691 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
4692 within a buffer would prematurely terminate a compare between buffer
4695 Added a check for string overflow (>200 characters as per the ACPI
4696 specification) during the Concatenate operator with two string operands.
4698 Code and Data Size: Current and previous core subsystem library sizes are
4699 shown below. These are the code and data sizes for the acpica.lib produced
4700 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4701 any ACPI driver or OSPM code. The debug version of the code includes the
4702 debug output trace mechanism and has a much larger code and data size. Note
4703 that these values will vary depending on the efficiency of the compiler and
4704 the compiler options used during generation.
4707 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4708 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4710 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4711 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4715 2) iASL Compiler/Disassembler:
4717 Allow the use of the ObjectType operator on uninitialized Locals and Args
4718 (returns 0 as per the ACPI specification).
4720 Fixed a problem where the compiler would fault if there was a syntax error
4721 in the FieldName of all of the various CreateXXXField operators.
4723 Disallow the use of lower case letters within the EISAID macro, as per the
4724 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
4725 U is an uppercase letter and N is a hex digit.
4728 ----------------------------------------
4729 06 October 2004. Summary of changes for version 20041006:
4731 1) ACPI CA Core Subsystem:
4733 Implemented support for the ACPI 3.0 Timer operator. This ASL function
4734 implements a 64-bit timer with 100 nanosecond granularity.
4736 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
4737 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
4738 the timer with the best clock available. Also, it keeps the core subsystem
4739 out of the clock handling business, since the host OS (usually) performs
4742 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
4743 functions use a 64-bit address which is part of the packed ACPI Generic
4744 Address Structure. Since the structure is non-aligned, the alignment macros
4745 are now used to extract the address to a local variable before use.
4747 Fixed a problem where the ToInteger operator assumed all input strings were
4748 hexadecimal. The operator now handles both decimal strings and hex strings
4749 (prefixed with "0x").
4751 Fixed a problem where the string length in the string object created as a
4752 result of the internal ConvertToString procedure could be incorrect. This
4753 potentially affected all implicit conversions and also the ToDecimalString
4754 and ToHexString operators.
4756 Fixed two problems in the ToString operator. If the length parameter was
4757 zero, an incorrect string object was created and the value of the input
4758 length parameter was inadvertently changed from zero to Ones.
4760 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
4761 resource macro was ignored.
4763 Simplified the interfaces to the internal division functions, reducing code
4764 size and complexity.
4766 Code and Data Size: Current and previous core subsystem library sizes are
4767 shown below. These are the code and data sizes for the acpica.lib produced
4768 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4769 any ACPI driver or OSPM code. The debug version of the code includes the
4770 debug output trace mechanism and has a much larger code and data size. Note
4771 that these values will vary depending on the efficiency of the compiler and
4772 the compiler options used during generation.
4775 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4776 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4778 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4779 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4782 2) iASL Compiler/Disassembler:
4784 Implemented support for the ACPI 3.0 Timer operator.
4786 Fixed a problem where the Default() operator was inadvertently ignored in a
4787 Switch/Case block. This was a problem in the translation of the Switch
4788 statement to If...Else pairs.
4790 Added support to allow a standalone Return operator, with no parentheses (or
4793 Fixed a problem with code generation for the ElseIf operator where the
4794 translated Else...If parse tree was improperly constructed leading to the
4797 ----------------------------------------
4798 22 September 2004. Summary of changes for version 20040922:
4800 1) ACPI CA Core Subsystem:
4802 Fixed a problem with the implementation of the LNot() operator where "Ones"
4803 was not returned for the TRUE case. Changed the code to return Ones instead
4804 of (!Arg) which was usually 1. This change affects iASL constant folding for
4807 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
4808 initialized properly -- Now zero the entire buffer in this case where the
4809 buffer already exists.
4811 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
4812 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
4813 related code considerably. This will require changes/updates to all OS
4814 interface layers (OSLs.)
4816 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
4817 a system exception handler to be installed. This handler is invoked upon any
4818 run-time exception that occurs during control method execution.
4820 Added support for the DSDT in AcpiTbFindTable. This allows the
4821 DataTableRegion() operator to access the local copy of the DSDT.
4823 Code and Data Size: Current and previous core subsystem library sizes are
4824 shown below. These are the code and data sizes for the acpica.lib produced
4825 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4826 any ACPI driver or OSPM code. The debug version of the code includes the
4827 debug output trace mechanism and has a much larger code and data size. Note
4828 that these values will vary depending on the efficiency of the compiler and
4829 the compiler options used during generation.
4832 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4833 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4835 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4836 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4839 2) iASL Compiler/Disassembler:
4841 Fixed a problem with constant folding and the LNot operator. LNot was
4842 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
4843 could result in the generation of an incorrect folded/reduced constant.
4845 End-Of-File is now allowed within a "//"-style comment. A parse error no
4846 longer occurs if such a comment is at the very end of the input ASL source
4849 Implemented the "-r" option to override the Revision in the table header.
4850 The initial use of this option will be to simplify the evaluation of the AML
4851 interpreter by allowing a single ASL source module to be compiled for either
4852 32-bit or 64-bit integers.
4855 ----------------------------------------
4856 27 August 2004. Summary of changes for version 20040827:
4858 1) ACPI CA Core Subsystem:
4860 - Implemented support for implicit object conversion in the non-numeric
4861 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
4862 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
4863 the second operand is implicitly converted on the fly to match the type of
4864 the first operand. For example:
4866 LEqual (Source1, Source2)
4868 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
4869 The data type of Source1 dictates the required type of Source2. Source2 is
4870 implicitly converted if necessary to match the type of Source1.
4872 - Updated and corrected the behavior of the string conversion support. The
4873 rules concerning conversion of buffers to strings (according to the ACPI
4874 specification) are as follows:
4876 ToDecimalString - explicit byte-wise conversion of buffer to string of
4877 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
4878 conversion of buffer to string of hex values (0-FF) separated by commas.
4879 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
4880 copy with no transform except NULL terminated. Any other implicit buffer-to-
4881 string conversion - byte-wise conversion of buffer to string of hex values
4882 (0-FF) separated by spaces.
4884 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
4886 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
4887 one byte too short in the case of a node in the root scope. This could
4888 cause a fault during debug output.
4890 - Code and Data Size: Current and previous core subsystem library sizes are
4891 shown below. These are the code and data sizes for the acpica.lib produced
4892 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4893 any ACPI driver or OSPM code. The debug version of the code includes the
4894 debug output trace mechanism and has a much larger code and data size. Note
4895 that these values will vary depending on the efficiency of the compiler and
4896 the compiler options used during generation.
4899 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4900 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4902 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4903 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4906 2) iASL Compiler/Disassembler:
4908 - Fixed a Linux generation error.
4911 ----------------------------------------
4912 16 August 2004. Summary of changes for version 20040816:
4914 1) ACPI CA Core Subsystem:
4916 Designed and implemented support within the AML interpreter for the so-
4917 called "implicit return". This support returns the result of the last ASL
4918 operation within a control method, in the absence of an explicit Return()
4919 operator. A few machines depend on this behavior, even though it is not
4920 explicitly supported by the ASL language. It is optional support that can
4921 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
4923 Removed support for the PCI_Config address space from the internal low level
4924 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
4925 support was not used internally, and would not work correctly anyway because
4926 the PCI bus number and segment number were not supported. There are
4927 separate interfaces for PCI configuration space access because of the unique
4930 Code and Data Size: Current and previous core subsystem library sizes are
4931 shown below. These are the code and data sizes for the acpica.lib produced
4932 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4933 any ACPI driver or OSPM code. The debug version of the code includes the
4934 debug output trace mechanism and has a much larger code and data size. Note
4935 that these values will vary depending on the efficiency of the compiler and
4936 the compiler options used during generation.
4939 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4940 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
4942 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4943 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4946 2) iASL Compiler/Disassembler:
4948 Fixed a problem where constants in ASL expressions at the root level (not
4949 within a control method) could be inadvertently truncated during code
4950 generation. This problem was introduced in the 20040715 release.
4953 ----------------------------------------
4954 15 July 2004. Summary of changes for version 20040715:
4956 1) ACPI CA Core Subsystem:
4958 Restructured the internal HW GPE interfaces to pass/track the current state
4959 of interrupts (enabled/disabled) in order to avoid possible deadlock and
4960 increase flexibility of the interfaces.
4962 Implemented a "lexicographical compare" for String and Buffer objects within
4963 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
4964 as per further clarification to the ACPI specification. Behavior is similar
4965 to C library "strcmp".
4967 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
4968 external function. In the 32-bit non-debug case, the stack use has been
4969 reduced from 168 bytes to 32 bytes.
4971 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
4972 whose purpose is to allow the AML interpreter to forgive certain bad AML
4973 constructs. Default setting is FALSE.
4975 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
4976 support code. If enabled, it allows field access to go beyond the end of a
4977 region definition if the field is within the region length rounded up to the
4978 next access width boundary (a common coding error.)
4980 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
4981 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
4982 symbols are lowercased by the latest version of the AcpiSrc tool.
4984 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
4985 rename "Register" to simply "Reg" to prevent certain compilers from
4988 Code and Data Size: Current and previous core subsystem library sizes are
4989 shown below. These are the code and data sizes for the acpica.lib produced
4990 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4991 any ACPI driver or OSPM code. The debug version of the code includes the
4992 debug output trace mechanism and has a much larger code and data size. Note
4993 that these values will vary depending on the efficiency of the compiler and
4994 the compiler options used during generation.
4997 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4998 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5000 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5001 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5004 2) iASL Compiler/Disassembler:
5006 Implemented full support for Package objects within the Case() operator.
5007 Note: The Break() operator is currently not supported within Case blocks
5008 (TermLists) as there is some question about backward compatibility with ACPI
5012 Fixed a problem where complex terms were not supported properly within the
5015 Eliminated extraneous warning for compiler-emitted reserved names of the
5016 form "_T_x". (Used in Switch/Case operators.)
5018 Eliminated optimization messages for "_T_x" objects and small constants
5019 within the DefinitionBlock operator.
5022 ----------------------------------------
5023 15 June 2004. Summary of changes for version 20040615:
5025 1) ACPI CA Core Subsystem:
5027 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5028 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5031 All directory names in the entire source package are lower case, as they
5032 were in earlier releases.
5034 Implemented "Disassemble" command in the AML debugger that will disassemble
5035 a single control method.
5037 Code and Data Size: Current and previous core subsystem library sizes are
5038 shown below. These are the code and data sizes for the acpica.lib produced
5039 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5040 any ACPI driver or OSPM code. The debug version of the code includes the
5041 debug output trace mechanism and has a much larger code and data size. Note
5042 that these values will vary depending on the efficiency of the compiler and
5043 the compiler options used during generation.
5046 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5047 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5050 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5051 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5054 2) iASL Compiler/Disassembler:
5056 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5057 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5060 All directory names in the entire source package are lower case, as they
5061 were in earlier releases.
5063 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
5066 Fixed an issue with the Windows version of the compiler where later versions
5067 of Windows place the FADT in the registry under the name "FADT" and not
5068 "FACP" as earlier versions did. This applies when using the -g or -
5069 d<nofilename> options. The compiler now looks for both strings as
5072 Fixed a problem with compiler namepath optimization where a namepath within
5073 the Scope() operator could not be optimized if the namepath was a subpath of
5074 the current scope path.
5076 ----------------------------------------
5077 27 May 2004. Summary of changes for version 20040527:
5079 1) ACPI CA Core Subsystem:
5081 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
5082 support in the RSDP scan code. The original code improperly scanned for the
5083 EBDA by simply scanning from memory location 0 to 0x400. The correct method
5084 is to first obtain the EBDA pointer from within the BIOS data area, then
5085 scan 1K of memory starting at the EBDA pointer. There appear to be few if
5086 any machines that place the RSDP in the EBDA, however.
5088 Integrated a fix for a possible fault during evaluation of BufferField
5089 arguments. Obsolete code that was causing the problem was removed.
5091 Found and fixed a problem in the Field Support Code where data could be
5092 corrupted on a bit field read that starts on an aligned boundary but does
5093 not end on an aligned boundary. Merged the read/write "datum length"
5094 calculation code into a common procedure.
5096 Rolled in a couple of changes to the FreeBSD-specific header.
5099 Code and Data Size: Current and previous core subsystem library sizes are
5100 shown below. These are the code and data sizes for the acpica.lib produced
5101 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5102 any ACPI driver or OSPM code. The debug version of the code includes the
5103 debug output trace mechanism and has a much larger code and data size. Note
5104 that these values will vary depending on the efficiency of the compiler and
5105 the compiler options used during generation.
5108 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5109 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5111 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5112 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5115 2) iASL Compiler/Disassembler:
5117 Fixed a generation warning produced by some overly-verbose compilers for a
5120 ----------------------------------------
5121 14 May 2004. Summary of changes for version 20040514:
5123 1) ACPI CA Core Subsystem:
5125 Fixed a problem where hardware GPE enable bits sometimes not set properly
5126 during and after GPE method execution. Result of 04/27 changes.
5128 Removed extra "clear all GPEs" when sleeping/waking.
5130 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
5131 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
5132 the new AcpiEv* calls as appropriate.
5134 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
5135 now "Microsoft Windows NT" for maximum compatibility. However this can be
5136 changed by modifying the acconfig.h file.
5138 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
5139 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
5141 Run _INI methods on ThermalZone objects. This is against the ACPI
5142 specification, but there is apparently ASL code in the field that has these
5143 _INI methods, and apparently "other" AML interpreters execute them.
5145 Performed a full 16/32/64 bit lint that resulted in some small changes.
5147 Added a sleep simulation command to the AML debugger to test sleep code.
5149 Code and Data Size: Current and previous core subsystem library sizes are
5150 shown below. These are the code and data sizes for the acpica.lib produced
5151 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5152 any ACPI driver or OSPM code. The debug version of the code includes the
5153 debug output trace mechanism and has a much larger code and data size. Note
5154 that these values will vary depending on the efficiency of the compiler and
5155 the compiler options used during generation.
5158 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5159 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5161 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5162 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5164 ----------------------------------------
5165 27 April 2004. Summary of changes for version 20040427:
5167 1) ACPI CA Core Subsystem:
5169 Completed a major overhaul of the GPE handling within ACPI CA. There are
5170 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
5171 The only GPEs allowed to be combination wake/run are for button-style
5172 devices such as a control-method power button, control-method sleep button,
5173 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
5174 referenced by any _PRW methods are marked for "runtime" and hardware
5175 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
5176 (and disabled at runtime). However, at sleep time, only those GPEs that
5177 have been specifically enabled for wake via the AcpiEnableGpe interface will
5178 actually be hardware enabled.
5180 A new external interface has been added, AcpiSetGpeType(), that is meant to
5181 be used by device drivers to force a GPE to a particular type. It will be
5182 especially useful for the drivers for the button devices mentioned above.
5184 Completed restructuring of the ACPI CA initialization sequence so that
5185 default operation region handlers are installed before GPEs are initialized
5186 and the _PRW methods are executed. This will prevent errors when the _PRW
5187 methods attempt to access system memory or I/O space.
5189 GPE enable/disable no longer reads the GPE enable register. We now keep the
5190 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
5191 thus no longer depend on the hardware to maintain these bits.
5193 Always clear the wake status and fixed/GPE status bits before sleep, even
5196 Improved the AML debugger output for displaying the GPE blocks and their
5199 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
5202 Fixed a problem where the physical address was incorrectly calculated when
5203 the Load() operator was used to directly load from an Operation Region (vs.
5204 loading from a Field object.) Also added check for minimum table length for
5207 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
5210 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
5211 consistency with the other fields returned.
5213 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
5214 structure for each GPE in the system, so the size of this structure is
5217 CPU stack requirement reduction: Cleaned up the method execution and object
5218 evaluation paths so that now a parameter structure is passed, instead of
5219 copying the various method parameters over and over again.
5221 In evregion.c: Correctly exit and reenter the interpreter region if and
5222 only if dispatching an operation region request to a user-installed handler.
5223 Do not exit/reenter when dispatching to a default handler (e.g., default
5224 system memory or I/O handlers)
5227 Notes for updating drivers for the new GPE support. The following changes
5228 must be made to ACPI-related device drivers that are attached to one or more
5229 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
5231 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
5232 explicitly call AcpiEnableGpe.
5233 2) There is a new interface called AcpiSetGpeType. This should be called
5234 before enabling the GPE. Also, this interface will automatically disable
5235 the GPE if it is currently enabled.
5236 3) AcpiEnableGpe no longer supports a GPE type flag.
5238 Specific drivers that must be changed:
5240 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
5241 AeGpeHandler, NULL);
5242 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
5243 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
5245 2) Button Drivers (Power, Lid, Sleep):
5246 Run _PRW method under parent device
5247 If _PRW exists: /* This is a control-method button */
5248 Extract GPE number and possibly GpeDevice
5249 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
5250 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
5252 For all other devices that have _PRWs, we automatically set the GPE type to
5253 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
5254 must be done on a selective basis, usually requiring some kind of user app
5255 to allow the user to pick the wake devices.
5258 Code and Data Size: Current and previous core subsystem library sizes are
5259 shown below. These are the code and data sizes for the acpica.lib produced
5260 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5261 any ACPI driver or OSPM code. The debug version of the code includes the
5262 debug output trace mechanism and has a much larger code and data size. Note
5263 that these values will vary depending on the efficiency of the compiler and
5264 the compiler options used during generation.
5267 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5268 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5271 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5272 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5276 ----------------------------------------
5277 02 April 2004. Summary of changes for version 20040402:
5279 1) ACPI CA Core Subsystem:
5281 Fixed an interpreter problem where an indirect store through an ArgX
5282 parameter was incorrectly applying the "implicit conversion rules" during
5283 the store. From the ACPI specification: "If the target is a method local or
5284 argument (LocalX or ArgX), no conversion is performed and the result is
5285 stored directly to the target". The new behavior is to disable implicit
5286 conversion during ALL stores to an ArgX.
5288 Changed the behavior of the _PRW method scan to ignore any and all errors
5289 returned by a given _PRW. This prevents the scan from aborting from the
5290 failure of any single _PRW.
5292 Moved the runtime configuration parameters from the global init procedure to
5293 static variables in acglobal.h. This will allow the host to override the
5294 default values easily.
5296 Code and Data Size: Current and previous core subsystem library sizes are
5297 shown below. These are the code and data sizes for the acpica.lib produced
5298 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5299 any ACPI driver or OSPM code. The debug version of the code includes the
5300 debug output trace mechanism and has a much larger code and data size. Note
5301 that these values will vary depending on the efficiency of the compiler and
5302 the compiler options used during generation.
5305 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5306 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5308 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5309 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5312 2) iASL Compiler/Disassembler:
5314 iASL now fully disassembles SSDTs. However, External() statements are not
5315 generated automatically for unresolved symbols at this time. This is a
5316 planned feature for future implementation.
5318 Fixed a scoping problem in the disassembler that occurs when the type of the
5319 target of a Scope() operator is overridden. This problem caused an
5320 incorrectly nested internal namespace to be constructed.
5322 Any warnings or errors that are emitted during disassembly are now commented
5323 out automatically so that the resulting file can be recompiled without any
5326 ----------------------------------------
5327 26 March 2004. Summary of changes for version 20040326:
5329 1) ACPI CA Core Subsystem:
5331 Implemented support for "wake" GPEs via interaction between GPEs and the
5332 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
5333 identified as a WAKE GPE and by default will no longer be enabled at
5334 runtime. Previously, we were blindly enabling all GPEs with a corresponding
5335 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
5336 believe this has been the cause of thousands of "spurious" GPEs on some
5339 This new GPE behavior is can be reverted to the original behavior (enable
5340 ALL GPEs at runtime) via a runtime flag.
5342 Fixed a problem where aliased control methods could not access objects
5343 properly. The proper scope within the namespace was not initialized
5344 (transferred to the target of the aliased method) before executing the
5347 Fixed a potential race condition on internal object deletion on the return
5348 object in AcpiEvaluateObject.
5350 Integrated a fix for resource descriptors where both _MEM and _MTP were
5351 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5352 wide, 0x0F instead of 0x03.)
5354 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
5355 fault in some cases.
5357 Updated Notify() values for debug statements in evmisc.c
5359 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
5361 Code and Data Size: Current and previous core subsystem library sizes are
5362 shown below. These are the code and data sizes for the acpica.lib produced
5363 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5364 any ACPI driver or OSPM code. The debug version of the code includes the
5365 debug output trace mechanism and has a much larger code and data size. Note
5366 that these values will vary depending on the efficiency of the compiler and
5367 the compiler options used during generation.
5371 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5372 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5374 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5375 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5377 ----------------------------------------
5378 11 March 2004. Summary of changes for version 20040311:
5380 1) ACPI CA Core Subsystem:
5382 Fixed a problem where errors occurring during the parse phase of control
5383 method execution did not abort cleanly. For example, objects created and
5384 installed in the namespace were not deleted. This caused all subsequent
5385 invocations of the method to return the AE_ALREADY_EXISTS exception.
5387 Implemented a mechanism to force a control method to "Serialized" execution
5388 if the method attempts to create namespace objects. (The root of the
5389 AE_ALREADY_EXISTS problem.)
5391 Implemented support for the predefined _OSI "internal" control method.
5392 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
5393 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
5394 This feature will allow "other" operating systems to execute the fully
5395 tested, "Windows" code path through the ASL code
5397 Global Lock Support: Now allows multiple acquires and releases with any
5398 internal thread. Removed concept of "owning thread" for this special mutex.
5400 Fixed two functions that were inappropriately declaring large objects on the
5401 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
5402 method execution considerably.
5404 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
5405 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
5407 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
5408 defined on the machine.
5410 Implemented two runtime options: One to force all control method execution
5411 to "Serialized" to mimic Windows behavior, another to disable _OSI support
5412 if it causes problems on a given machine.
5414 Code and Data Size: Current and previous core subsystem library sizes are
5415 shown below. These are the code and data sizes for the acpica.lib produced
5416 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5417 any ACPI driver or OSPM code. The debug version of the code includes the
5418 debug output trace mechanism and has a much larger code and data size. Note
5419 that these values will vary depending on the efficiency of the compiler and
5420 the compiler options used during generation.
5423 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5424 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5426 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5427 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5429 2) iASL Compiler/Disassembler:
5431 Fixed an array size problem for FreeBSD that would cause the compiler to
5434 ----------------------------------------
5435 20 February 2004. Summary of changes for version 20040220:
5438 1) ACPI CA Core Subsystem:
5440 Implemented execution of _SxD methods for Device objects in the
5441 GetObjectInfo interface.
5443 Fixed calls to _SST method to pass the correct arguments.
5445 Added a call to _SST on wake to restore to "working" state.
5447 Check for End-Of-Buffer failure case in the WalkResources interface.
5449 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
5450 structures to the beginning of the file.
5452 After wake, clear GPE status register(s) before enabling GPEs.
5454 After wake, clear/enable power button. (Perhaps we should clear/enable all
5455 fixed events upon wake.)
5457 Fixed a couple of possible memory leaks in the Namespace manager.
5459 Integrated latest acnetbsd.h file.
5461 ----------------------------------------
5462 11 February 2004. Summary of changes for version 20040211:
5465 1) ACPI CA Core Subsystem:
5467 Completed investigation and implementation of the call-by-reference
5468 mechanism for control method arguments.
5470 Fixed a problem where a store of an object into an indexed package could
5471 fail if the store occurs within a different method than the method that
5472 created the package.
5474 Fixed a problem where the ToDecimal operator could return incorrect results.
5476 Fixed a problem where the CopyObject operator could fail on some of the more
5477 obscure objects (e.g., Reference objects.)
5479 Improved the output of the Debug object to display buffer, package, and
5482 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
5483 the expected result.
5485 Added permanent ACPI_REPORT_ERROR macros for all instances of the
5486 ACPI_AML_INTERNAL exception.
5488 Integrated latest version of acfreebsd.h
5490 ----------------------------------------
5491 16 January 2004. Summary of changes for version 20040116:
5493 The purpose of this release is primarily to update the copyright years in
5494 each module, thus causing a huge number of diffs. There are a few small
5495 functional changes, however.
5497 1) ACPI CA Core Subsystem:
5499 Improved error messages when there is a problem finding one or more of the
5500 required base ACPI tables
5502 Reintroduced the definition of APIC_HEADER in actbl.h
5504 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
5506 Removed extraneous reference to NewObj in dsmthdat.c
5510 Fixed a problem introduced in December that disabled the correct disassembly
5511 of Resource Templates
5514 ----------------------------------------
5515 03 December 2003. Summary of changes for version 20031203:
5517 1) ACPI CA Core Subsystem:
5519 Changed the initialization of Operation Regions during subsystem
5520 init to perform two entire walks of the ACPI namespace; The first
5521 to initialize the regions themselves, the second to execute the
5522 _REG methods. This fixed some interdependencies across _REG
5523 methods found on some machines.
5525 Fixed a problem where a Store(Local0, Local1) could simply update
5526 the object reference count, and not create a new copy of the
5527 object if the Local1 is uninitialized.
5529 Implemented support for the _SST reserved method during sleep
5532 Implemented support to clear the SLP_TYP and SLP_EN bits when
5533 waking up, this is apparently required by some machines.
5535 When sleeping, clear the wake status only if SleepState is not S5.
5537 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
5538 pointer arithmetic advanced a string pointer too far.
5540 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
5541 could be returned if the requested table has not been loaded.
5543 Within the support for IRQ resources, restructured the handling of
5544 the active and edge/level bits.
5546 Fixed a few problems in AcpiPsxExecute() where memory could be
5547 leaked under certain error conditions.
5549 Improved error messages for the cases where the ACPI mode could
5552 Code and Data Size: Current and previous core subsystem library
5553 sizes are shown below. These are the code and data sizes for the
5554 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5555 these values do not include any ACPI driver or OSPM code. The
5556 debug version of the code includes the debug output trace
5557 mechanism and has a much larger code and data size. Note that
5558 these values will vary depending on the efficiency of the compiler
5559 and the compiler options used during generation.
5561 Previous Release (20031029):
5562 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5563 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5565 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5566 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5568 2) iASL Compiler/Disassembler:
5570 Implemented a fix for the iASL disassembler where a bad index was
5571 generated. This was most noticeable on 64-bit platforms
5574 ----------------------------------------
5575 29 October 2003. Summary of changes for version 20031029:
5577 1) ACPI CA Core Subsystem:
5580 Fixed a problem where a level-triggered GPE with an associated
5581 _Lxx control method was incorrectly cleared twice.
5583 Fixed a problem with the Field support code where an access can
5584 occur beyond the end-of-region if the field is non-aligned but
5585 extends to the very end of the parent region (resulted in an
5586 AE_AML_REGION_LIMIT exception.)
5588 Fixed a problem with ACPI Fixed Events where an RT Clock handler
5589 would not get invoked on an RTC event. The RTC event bitmasks for
5590 the PM1 registers were not being initialized properly.
5592 Implemented support for executing _STA and _INI methods for
5593 Processor objects. Although this is currently not part of the
5594 ACPI specification, there is existing ASL code that depends on the
5595 init-time execution of these methods.
5597 Implemented and deployed a GetDescriptorName function to decode
5598 the various types of internal descriptors. Guards against null
5599 descriptors during debug output also.
5601 Implemented and deployed a GetNodeName function to extract the 4-
5602 character namespace node name. This function simplifies the debug
5603 and error output, as well as guarding against null pointers during
5606 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
5607 simplify the debug and error output of 64-bit integers. This
5608 macro replaces the HIDWORD and LODWORD macros for dumping these
5611 Updated the implementation of the Stall() operator to only call
5612 AcpiOsStall(), and also return an error if the operand is larger
5613 than 255. This preserves the required behavior of not
5614 relinquishing the processor, as would happen if AcpiOsSleep() was
5615 called for "long stalls".
5617 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
5618 initialized are now treated as NOOPs.
5620 Cleaned up a handful of warnings during 64-bit generation.
5622 Fixed a reported error where and incorrect GPE number was passed
5623 to the GPE dispatch handler. This value is only used for error
5624 output, however. Used this opportunity to clean up and streamline
5625 the GPE dispatch code.
5627 Code and Data Size: Current and previous core subsystem library
5628 sizes are shown below. These are the code and data sizes for the
5629 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5630 these values do not include any ACPI driver or OSPM code. The
5632 debug version of the code includes the debug output trace
5633 mechanism and has a much larger code and data size. Note that
5634 these values will vary depending on the efficiency of the compiler
5635 and the compiler options used during generation.
5637 Previous Release (20031002):
5638 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5639 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5641 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5642 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5645 2) iASL Compiler/Disassembler:
5647 Updated the iASL compiler to return an error if the operand to the
5648 Stall() operator is larger than 255.
5651 ----------------------------------------
5652 02 October 2003. Summary of changes for version 20031002:
5655 1) ACPI CA Core Subsystem:
5657 Fixed a problem with Index Fields where the index was not
5658 incremented for fields that require multiple writes to the
5659 index/data registers (Fields that are wider than the data
5662 Fixed a problem with all Field objects where a write could go
5663 beyond the end-of-field if the field was larger than the access
5664 granularity and therefore required multiple writes to complete the
5665 request. An extra write beyond the end of the field could happen
5668 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
5669 would incorrectly be returned if the width of the Data Register
5670 was larger than the specified field access width.
5672 Completed fixes for LoadTable() and Unload() and verified their
5673 operation. Implemented full support for the "DdbHandle" object
5674 throughout the ACPI CA subsystem.
5676 Implemented full support for the MADT and ECDT tables in the ACPI
5677 CA header files. Even though these tables are not directly
5678 consumed by ACPI CA, the header definitions are useful for ACPI
5681 Integrated resource descriptor fixes posted to the Linux ACPI
5682 list. This included checks for minimum descriptor length, and
5683 support for trailing NULL strings within descriptors that have
5684 optional string elements.
5686 Code and Data Size: Current and previous core subsystem library
5687 sizes are shown below. These are the code and data sizes for the
5688 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5689 these values do not include any ACPI driver or OSPM code. The
5690 debug version of the code includes the debug output trace
5691 mechanism and has a much larger code and data size. Note that
5692 these values will vary depending on the efficiency of the compiler
5693 and the compiler options used during generation.
5695 Previous Release (20030918):
5696 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5697 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5699 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5700 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5705 Implemented detection of non-ASCII characters within the input
5706 source ASL file. This catches attempts to compile binary (AML)
5707 files early in the compile, with an informative error message.
5709 Fixed a problem where the disassembler would fault if the output
5710 filename could not be generated or if the output file could not be
5713 ----------------------------------------
5714 18 September 2003. Summary of changes for version 20030918:
5717 1) ACPI CA Core Subsystem:
5719 Found and fixed a longstanding problem with the late execution of
5720 the various deferred AML opcodes (such as Operation Regions,
5721 Buffer Fields, Buffers, and Packages). If the name string
5722 specified for the name of the new object placed the object in a
5723 scope other than the current scope, the initialization/execution
5724 of the opcode failed. The solution to this problem was to
5725 implement a mechanism where the late execution of such opcodes
5726 does not attempt to lookup/create the name a second time in an
5727 incorrect scope. This fixes the "region size computed
5728 incorrectly" problem.
5730 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
5731 Global Lock AE_BAD_PARAMETER error.
5733 Fixed several 64-bit issues with prototypes, casting and data
5736 Removed duplicate prototype from acdisasm.h
5738 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
5740 Code and Data Size: Current and previous core subsystem library
5741 sizes are shown below. These are the code and data sizes for the
5742 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5743 these values do not include any ACPI driver or OSPM code. The
5744 debug version of the code includes the debug output trace
5745 mechanism and has a much larger code and data size. Note that
5746 these values will vary depending on the efficiency of the compiler
5747 and the compiler options used during generation.
5751 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5752 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5754 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5755 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5760 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
5761 correct sleep time in seconds.
5763 ----------------------------------------
5764 14 July 2003. Summary of changes for version 20030619:
5766 1) ACPI CA Core Subsystem:
5768 Parse SSDTs in order discovered, as opposed to reverse order
5771 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
5778 Dynamically allocate SDT list (suggested by Andi Kleen)
5780 proc function return value cleanups (Andi Kleen)
5782 Correctly handle NMI watchdog during long stalls (Andrew Morton)
5784 Make it so acpismp=force works (reported by Andrew Morton)
5787 ----------------------------------------
5788 19 June 2003. Summary of changes for version 20030619:
5790 1) ACPI CA Core Subsystem:
5792 Fix To/FromBCD, eliminating the need for an arch-specific #define.
5794 Do not acquire a semaphore in the S5 shutdown path.
5796 Fix ex_digits_needed for 0. (Takayoshi Kochi)
5798 Fix sleep/stall code reversal. (Andi Kleen)
5800 Revert a change having to do with control method calling
5805 acpiphp update (Takayoshi Kochi)
5807 Export acpi_disabled for sonypi (Stelian Pop)
5809 Mention acpismp=force in config help
5811 Re-add acpitable.c and acpismp=force. This improves backwards
5813 compatibility and also cleans up the code to a significant degree.
5815 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
5817 ----------------------------------------
5818 22 May 2003. Summary of changes for version 20030522:
5820 1) ACPI CA Core Subsystem:
5822 Found and fixed a reported problem where an AE_NOT_FOUND error
5823 occurred occasionally during _BST evaluation. This turned out to
5824 be an Owner ID allocation issue where a called method did not get
5825 a new ID assigned to it. Eventually, (after 64k calls), the Owner
5826 ID UINT16 would wraparound so that the ID would be the same as the
5827 caller's and the called method would delete the caller's
5830 Implemented extended error reporting for control methods that are
5831 aborted due to a run-time exception. Output includes the exact
5832 AML instruction that caused the method abort, a dump of the method
5833 locals and arguments at the time of the abort, and a trace of all
5834 nested control method calls.
5836 Modified the interpreter to allow the creation of buffers of zero
5837 length from the AML code. Implemented new code to ensure that no
5838 attempt is made to actually allocate a memory buffer (of length
5839 zero) - instead, a simple buffer object with a NULL buffer pointer
5840 and length zero is created. A warning is no longer issued when
5841 the AML attempts to create a zero-length buffer.
5843 Implemented a workaround for the "leading asterisk issue" in
5844 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
5845 asterisk is automatically removed if present in any HID, UID, or
5846 CID strings. The iASL compiler will still flag this asterisk as
5849 Implemented full support for _CID methods that return a package of
5850 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
5851 now additionally returns a device _CID list if present. This
5852 required a change to the external interface in order to pass an
5853 ACPI_BUFFER object as a parameter since the _CID list is of
5856 Fixed a problem with the new AE_SAME_HANDLER exception where
5857 handler initialization code did not know about this exception.
5859 Code and Data Size: Current and previous core subsystem library
5860 sizes are shown below. These are the code and data sizes for the
5861 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5862 these values do not include any ACPI driver or OSPM code. The
5863 debug version of the code includes the debug output trace
5864 mechanism and has a much larger code and data size. Note that
5865 these values will vary depending on the efficiency of the compiler
5866 and the compiler options used during generation.
5868 Previous Release (20030509):
5869 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5870 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5872 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5873 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5878 Fixed a bug in which we would reinitialize the ACPI interrupt
5879 after it was already working, thus disabling all ACPI and the IRQs
5880 for any other device sharing the interrupt. (Thanks to Stian
5883 Toshiba driver update (John Belmonte)
5885 Return only 0 or 1 for our interrupt handler status (Andrew
5891 Fixed a reported problem where multiple (nested) ElseIf()
5892 statements were not handled correctly by the compiler, resulting
5893 in incorrect warnings and incorrect AML code. This was a problem
5894 in both the ASL parser and the code generator.
5899 Added changes to existing interfaces, new exception codes, and new
5900 text concerning reference count object management versus garbage
5903 ----------------------------------------
5904 09 May 2003. Summary of changes for version 20030509.
5907 1) ACPI CA Core Subsystem:
5909 Changed the subsystem initialization sequence to hold off
5910 installation of address space handlers until the hardware has been
5911 initialized and the system has entered ACPI mode. This is because
5912 the installation of space handlers can cause _REG methods to be
5913 run. Previously, the _REG methods could potentially be run before
5914 ACPI mode was enabled.
5916 Fixed some memory leak issues related to address space handler and
5917 notify handler installation. There were some problems with the
5918 reference count mechanism caused by the fact that the handler
5919 objects are shared across several namespace objects.
5921 Fixed a reported problem where reference counts within the
5922 namespace were not properly updated when named objects created by
5923 method execution were deleted.
5925 Fixed a reported problem where multiple SSDTs caused a deletion
5926 issue during subsystem termination. Restructured the table data
5927 structures to simplify the linked lists and the related code.
5929 Fixed a problem where the table ID associated with secondary
5930 tables (SSDTs) was not being propagated into the namespace objects
5931 created by those tables. This would only present a problem for
5932 tables that are unloaded at run-time, however.
5934 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
5935 type as the length parameter (instead of UINT32).
5937 Solved a long-standing problem where an ALREADY_EXISTS error
5938 appears on various systems. This problem could happen when there
5939 are multiple PCI_Config operation regions under a single PCI root
5940 bus. This doesn't happen very frequently, but there are some
5941 systems that do this in the ASL.
5943 Fixed a reported problem where the internal DeleteNode function
5944 was incorrectly handling the case where a namespace node was the
5945 first in the parent's child list, and had additional peers (not
5946 the only child, but first in the list of children.)
5948 Code and Data Size: Current core subsystem library sizes are shown
5949 below. These are the code and data sizes for the acpica.lib
5950 produced by the Microsoft Visual C++ 6.0 compiler, and these
5951 values do not include any ACPI driver or OSPM code. The debug
5952 version of the code includes the debug output trace mechanism and
5953 has a much larger code and data size. Note that these values will
5954 vary depending on the efficiency of the compiler and the compiler
5955 options used during generation.
5958 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
5959 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
5961 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5962 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5967 Allow ":" in OS override string (Ducrot Bruno)
5969 Kobject fix (Greg KH)
5972 3 iASL Compiler/Disassembler:
5974 Fixed a problem in the generation of the C source code files (AML
5975 is emitted in C source statements for BIOS inclusion) where the
5976 Ascii dump that appears within a C comment at the end of each line
5977 could cause a compile time error if the AML sequence happens to
5978 have an open comment or close comment sequence embedded.
5981 ----------------------------------------
5982 24 April 2003. Summary of changes for version 20030424.
5985 1) ACPI CA Core Subsystem:
5987 Support for big-endian systems has been implemented. Most of the
5988 support has been invisibly added behind big-endian versions of the
5991 Fixed a problem in AcpiHwDisableGpeBlock() and
5992 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
5993 low level hardware write routine. The offset parameter was
5994 actually eliminated from the low level read/write routines because
5995 they had become obsolete.
5997 Fixed a problem where a handler object was deleted twice during
5998 the removal of a fixed event handler.
6003 A fix for SMP systems with link devices was contributed by
6007 (2.5) Return whether we handled the interrupt in our IRQ handler.
6008 (Linux ISRs no longer return void, so we can propagate the handler
6009 return value from the ACPI CA core back to the OS.)
6015 The ACPI CA Programmer Reference has been updated to reflect new
6016 interfaces and changes to existing interfaces.
6018 ----------------------------------------
6019 28 March 2003. Summary of changes for version 20030328.
6021 1) ACPI CA Core Subsystem:
6023 The GPE Block Device support has been completed. New interfaces
6024 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
6025 interfaces (enable, disable, clear, getstatus) have been split
6026 into separate interfaces for Fixed Events and General Purpose
6027 Events (GPEs) in order to support GPE Block Devices properly.
6029 Fixed a problem where the error message "Failed to acquire
6030 semaphore" would appear during operations on the embedded
6033 Code and Data Size: Current core subsystem library sizes are shown
6034 below. These are the code and data sizes for the acpica.lib
6035 produced by the Microsoft Visual C++ 6.0 compiler, and these
6036 values do not include any ACPI driver or OSPM code. The debug
6037 version of the code includes the debug output trace mechanism and
6038 has a much larger code and data size. Note that these values will
6039 vary depending on the efficiency of the compiler and the compiler
6040 options used during generation.
6043 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6044 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6046 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6047 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6050 ----------------------------------------
6051 28 February 2003. Summary of changes for version 20030228.
6054 1) ACPI CA Core Subsystem:
6056 The GPE handling and dispatch code has been completely overhauled
6057 in preparation for support of GPE Block Devices (ID ACPI0006).
6058 This affects internal data structures and code only; there should
6059 be no differences visible externally. One new file has been
6062 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
6063 fields that are used to determine the GPE block lengths. The
6064 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
6065 structures are ignored. This is per the ACPI specification but it
6066 isn't very clear. The full 256 Block 0/1 GPEs are now supported
6067 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
6069 In the SCI interrupt handler, removed the read of the PM1_CONTROL
6070 register to look at the SCI_EN bit. On some machines, this read
6071 causes an SMI event and greatly slows down SCI events. (This may
6072 in fact be the cause of slow battery status response on some
6075 Fixed a problem where a store of a NULL string to a package object
6076 could cause the premature deletion of the object. This was seen
6077 during execution of the battery _BIF method on some systems,
6078 resulting in no battery data being returned.
6080 Added AcpiWalkResources interface to simplify parsing of resource
6083 Code and Data Size: Current core subsystem library sizes are shown
6084 below. These are the code and data sizes for the acpica.lib
6085 produced by the Microsoft Visual C++ 6.0 compiler, and these
6086 values do not include any ACPI driver or OSPM code. The debug
6087 version of the code includes the debug output trace mechanism and
6088 has a much larger code and data size. Note that these values will
6089 vary depending on the efficiency of the compiler and the compiler
6090 options used during generation.
6093 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6094 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6096 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6097 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6102 S3 fixes (Ole Rohne)
6104 Update ACPI PHP driver with to use new acpi_walk_resource API
6107 Add S4BIOS support (Pavel Machek)
6109 Map in entire table before performing checksum (John Stultz)
6111 Expand the mem= cmdline to allow the specification of reserved and
6112 ACPI DATA blocks (Pavel Machek)
6114 Never use ACPI on VISWS
6116 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
6118 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
6119 causing us to think that some systems support C2 when they really
6122 Do not count processor objects for non-present CPUs (Thanks to
6128 Fixed a problem where ASL include files could not be found and
6131 Added support for the _PDC reserved name.
6134 ----------------------------------------
6135 22 January 2003. Summary of changes for version 20030122.
6138 1) ACPI CA Core Subsystem:
6140 Added a check for constructs of the form: Store (Local0, Local0)
6141 where Local0 is not initialized. Apparently, some BIOS
6142 programmers believe that this is a NOOP. Since this store doesn't
6143 do anything anyway, the new prototype behavior will ignore this
6144 error. This is a case where we can relax the strict checking in
6145 the interpreter in the name of compatibility.
6150 The AcpiSrc Source Conversion Utility has been released with the
6151 Linux package for the first time. This is the utility that is
6152 used to convert the ACPI CA base source code to the Linux version.
6154 (Both) Handle P_BLK lengths shorter than 6 more gracefully
6156 (Both) Move more headers to include/acpi, and delete an unused
6159 (Both) Move drivers/acpi/include directory to include/acpi
6161 (Both) Boot functions don't use cmdline, so don't pass it around
6163 (Both) Remove include of unused header (Adrian Bunk)
6165 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
6167 former now also includes the latter, acpiphp.h only needs the one,
6170 (2.5) Make it possible to select method of bios restoring after S3
6171 resume. [=> no more ugly ifdefs] (Pavel Machek)
6173 (2.5) Make proc write interfaces work (Pavel Machek)
6175 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
6177 (2.5) Break out ACPI Perf code into its own module, under cpufreq
6180 (2.4) S4BIOS support (Ducrot Bruno)
6182 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
6188 Added support to disassemble SSDT and PSDTs.
6190 Implemented support to obtain SSDTs from the Windows registry if
6194 ----------------------------------------
6195 09 January 2003. Summary of changes for version 20030109.
6197 1) ACPI CA Core Subsystem:
6199 Changed the behavior of the internal Buffer-to-String conversion
6200 function. The current ACPI specification states that the contents
6201 of the buffer are "converted to a string of two-character
6202 hexadecimal numbers, each separated by a space". Unfortunately,
6203 this definition is not backwards compatible with existing ACPI 1.0
6204 implementations (although the behavior was not defined in the ACPI
6205 1.0 specification). The new behavior simply copies data from the
6206 buffer to the string until a null character is found or the end of
6207 the buffer is reached. The new String object is always null
6208 terminated. This problem was seen during the generation of _BIF
6209 battery data where incorrect strings were returned for battery
6210 type, etc. This will also require an errata to the ACPI
6213 Renamed all instances of NATIVE_UINT and NATIVE_INT to
6214 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
6216 Copyright in all module headers (both Linux and non-Linux) has be
6219 Code and Data Size: Current core subsystem library sizes are shown
6220 below. These are the code and data sizes for the acpica.lib
6221 produced by the Microsoft Visual C++ 6.0 compiler, and these
6222 values do not include any ACPI driver or OSPM code. The debug
6223 version of the code includes the debug output trace mechanism and
6224 has a much larger code and data size. Note that these values will
6225 vary depending on the efficiency of the compiler and the compiler
6226 options used during generation.
6229 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6230 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6232 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6233 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6238 Fixed an oops on module insertion/removal (Matthew Tippett)
6240 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
6242 (2.5) Replace pr_debug (Randy Dunlap)
6244 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
6246 (Both) Eliminate spawning of thread from timer callback, in favor
6249 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
6251 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
6253 (Both) Add missing statics to button.c (Pavel Machek)
6255 Several changes have been made to the source code translation
6256 utility that generates the Linux Code in order to make the code
6259 All typedefs on structs and unions have been removed in keeping
6260 with the Linux coding style.
6262 Removed the non-Linux SourceSafe module revision number from each
6265 Completed major overhaul of symbols to be lowercased for linux.
6266 Doubled the number of symbols that are lowercased.
6268 Fixed a problem where identifiers within procedure headers and
6269 within quotes were not fully lower cased (they were left with a
6272 Some C macros whose only purpose is to allow the generation of 16-
6273 bit code are now completely removed in the Linux code, increasing
6274 readability and maintainability.
6276 ----------------------------------------
6278 12 December 2002. Summary of changes for version 20021212.
6281 1) ACPI CA Core Subsystem:
6283 Fixed a problem where the creation of a zero-length AML Buffer
6284 would cause a fault.
6286 Fixed a problem where a Buffer object that pointed to a static AML
6287 buffer (in an ACPI table) could inadvertently be deleted, causing
6290 Fixed a problem where a user buffer (passed in to the external
6291 ACPI CA interfaces) could be overwritten if the buffer was too
6292 small to complete the operation, causing memory corruption.
6294 Fixed a problem in the Buffer-to-String conversion code where a
6295 string of length one was always returned, regardless of the size
6296 of the input Buffer object.
6298 Removed the NATIVE_CHAR data type across the entire source due to
6299 lack of need and lack of consistent use.
6301 Code and Data Size: Current core subsystem library sizes are shown
6302 below. These are the code and data sizes for the acpica.lib
6303 produced by the Microsoft Visual C++ 6.0 compiler, and these
6304 values do not include any ACPI driver or OSPM code. The debug
6305 version of the code includes the debug output trace mechanism and
6306 has a much larger code and data size. Note that these values will
6307 vary depending on the efficiency of the compiler and the compiler
6308 options used during generation.
6311 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6312 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6314 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6315 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6318 ----------------------------------------
6319 05 December 2002. Summary of changes for version 20021205.
6321 1) ACPI CA Core Subsystem:
6323 Fixed a problem where a store to a String or Buffer object could
6324 cause corruption of the DSDT if the object type being stored was
6325 the same as the target object type and the length of the object
6326 being stored was equal to or smaller than the original (existing)
6327 target object. This was seen to cause corruption of battery _BIF
6328 buffers if the _BIF method modified the buffer on the fly.
6330 Fixed a problem where an internal error was generated if a control
6331 method invocation was used in an OperationRegion, Buffer, or
6332 Package declaration. This was caused by the deferred parsing of
6333 the control method and thus the deferred creation of the internal
6334 method object. The solution to this problem was to create the
6335 internal method object at the moment the method is encountered in
6336 the first pass - so that subsequent references to the method will
6337 able to obtain the required parameter count and thus properly
6338 parse the method invocation. This problem presented itself as an
6339 AE_AML_INTERNAL during the pass 1 parse phase during table load.
6341 Fixed a problem where the internal String object copy routine did
6342 not always allocate sufficient memory for the target String object
6343 and caused memory corruption. This problem was seen to cause
6344 "Allocation already present in list!" errors as memory allocation
6347 Implemented a new function for the evaluation of namespace objects
6348 that allows the specification of the allowable return object
6349 types. This simplifies a lot of code that checks for a return
6350 object of one or more specific objects returned from the
6351 evaluation (such as _STA, etc.) This may become and external
6352 function if it would be useful to ACPI-related drivers.
6354 Completed another round of prefixing #defines with "ACPI_" for
6357 Completed additional code restructuring to allow more modular
6358 linking for iASL compiler and AcpiExec. Several files were split
6359 creating new files. New files: nsparse.c dsinit.c evgpe.c
6361 Implemented an abort mechanism to terminate an executing control
6362 method via the AML debugger. This feature is useful for debugging
6363 control methods that depend (wait) for specific hardware
6366 Code and Data Size: Current core subsystem library sizes are shown
6367 below. These are the code and data sizes for the acpica.lib
6368 produced by the Microsoft Visual C++ 6.0 compiler, and these
6369 values do not include any ACPI driver or OSPM code. The debug
6370 version of the code includes the debug output trace mechanism and
6371 has a much larger code and data size. Note that these values will
6372 vary depending on the efficiency of the compiler and the compiler
6373 options used during generation.
6376 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6377 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6379 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6380 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6383 2) iASL Compiler/Disassembler
6385 Fixed a compiler code generation problem for "Interrupt" Resource
6386 Descriptors. If specified in the ASL, the optional "Resource
6387 Source Index" and "Resource Source" fields were not inserted into
6388 the correct location within the AML resource descriptor, creating
6389 an invalid descriptor.
6391 Fixed a disassembler problem for "Interrupt" resource descriptors.
6392 The optional "Resource Source Index" and "Resource Source" fields
6396 ----------------------------------------
6397 22 November 2002. Summary of changes for version 20021122.
6400 1) ACPI CA Core Subsystem:
6402 Fixed a reported problem where an object stored to a Method Local
6403 or Arg was not copied to a new object during the store - the
6404 object pointer was simply copied to the Local/Arg. This caused
6405 all subsequent operations on the Local/Arg to also affect the
6406 original source of the store operation.
6408 Fixed a problem where a store operation to a Method Local or Arg
6409 was not completed properly if the Local/Arg contained a reference
6410 (from RefOf) to a named field. The general-purpose store-to-
6411 namespace-node code is now used so that this case is handled
6414 Fixed a problem where the internal object copy routine would cause
6415 a protection fault if the object being copied was a Package and
6416 contained either 1) a NULL package element or 2) a nested sub-
6419 Fixed a problem with the GPE initialization that resulted from an
6420 ambiguity in the ACPI specification. One section of the
6421 specification states that both the address and length of the GPE
6422 block must be zero if the block is not supported. Another section
6423 implies that only the address need be zero if the block is not
6424 supported. The code has been changed so that both the address and
6425 the length must be non-zero to indicate a valid GPE block (i.e.,
6426 if either the address or the length is zero, the GPE block is
6429 Code and Data Size: Current core subsystem library sizes are shown
6430 below. These are the code and data sizes for the acpica.lib
6431 produced by the Microsoft Visual C++ 6.0 compiler, and these
6432 values do not include any ACPI driver or OSPM code. The debug
6433 version of the code includes the debug output trace mechanism and
6434 has a much larger code and data size. Note that these values will
6435 vary depending on the efficiency of the compiler and the compiler
6436 options used during generation.
6439 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6440 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6442 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6443 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6448 Cleaned up EC driver. Exported an external EC read/write
6449 interface. By going through this, other drivers (most notably
6450 sonypi) will be able to serialize access to the EC.
6453 3) iASL Compiler/Disassembler
6455 Implemented support to optionally generate include files for both
6456 ASM and C (the -i switch). This simplifies BIOS development by
6457 automatically creating include files that contain external
6458 declarations for the symbols that are created within the
6460 (optionally generated) ASM and C AML source files.
6463 ----------------------------------------
6464 15 November 2002. Summary of changes for version 20021115.
6466 1) ACPI CA Core Subsystem:
6468 Fixed a memory leak problem where an error during resolution of
6470 method arguments during a method invocation from another method
6471 failed to cleanup properly by deleting all successfully resolved
6474 Fixed a problem where the target of the Index() operator was not
6475 correctly constructed if the source object was a package. This
6476 problem has not been detected because the use of a target operand
6477 with Index() is very rare.
6479 Fixed a problem with the Index() operator where an attempt was
6480 made to delete the operand objects twice.
6482 Fixed a problem where an attempt was made to delete an operand
6483 twice during execution of the CondRefOf() operator if the target
6486 Implemented the first of perhaps several internal create object
6487 functions that create and initialize a specific object type. This
6488 consolidates duplicated code wherever the object is created, thus
6489 shrinking the size of the subsystem.
6491 Implemented improved debug/error messages for errors that occur
6492 during nested method invocations. All executing method pathnames
6493 are displayed (with the error) as the call stack is unwound - thus
6496 Fixed a problem introduced in the 10/02 release that caused
6497 premature deletion of a buffer object if a buffer was used as an
6498 ASL operand where an integer operand is required (Thus causing an
6499 implicit object conversion from Buffer to Integer.) The change in
6500 the 10/02 release was attempting to fix a memory leak (albeit
6503 Code and Data Size: Current core subsystem library sizes are shown
6504 below. These are the code and data sizes for the acpica.lib
6505 produced by the Microsoft Visual C++ 6.0 compiler, and these
6506 values do not include any ACPI driver or OSPM code. The debug
6507 version of the code includes the debug output trace mechanism and
6508 has a much larger code and data size. Note that these values will
6509 vary depending on the efficiency of the compiler and the compiler
6510 options used during generation.
6513 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6514 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6516 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6517 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6522 Changed the implementation of the ACPI semaphores to use down()
6523 instead of down_interruptable(). It is important that the
6524 execution of ACPI control methods not be interrupted by signals.
6525 Methods must run to completion, or the system may be left in an
6526 unknown/unstable state.
6528 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
6532 3) iASL Compiler/Disassembler
6535 Changed the default location of output files. All output files
6536 are now placed in the current directory by default instead of in
6537 the directory of the source file. This change may affect some
6538 existing makefiles, but it brings the behavior of the compiler in
6539 line with other similar tools. The location of the output files
6540 can be overridden with the -p command line switch.
6543 ----------------------------------------
6544 11 November 2002. Summary of changes for version 20021111.
6547 0) ACPI Specification 2.0B is released and is now available at:
6548 http://www.acpi.info/index.html
6551 1) ACPI CA Core Subsystem:
6553 Implemented support for the ACPI 2.0 SMBus Operation Regions.
6554 This includes the early detection and handoff of the request to
6555 the SMBus region handler (avoiding all of the complex field
6556 support code), and support for the bidirectional return packet
6557 from an SMBus write operation. This paves the way for the
6558 development of SMBus drivers in each host operating system.
6560 Fixed a problem where the semaphore WAIT_FOREVER constant was
6561 defined as 32 bits, but must be 16 bits according to the ACPI
6562 specification. This had the side effect of causing ASL
6563 Mutex/Event timeouts even though the ASL code requested a wait
6564 forever. Changed all internal references to the ACPI timeout
6565 parameter to 16 bits to prevent future problems. Changed the name
6566 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
6568 Code and Data Size: Current core subsystem library sizes are shown
6569 below. These are the code and data sizes for the acpica.lib
6570 produced by the Microsoft Visual C++ 6.0 compiler, and these
6571 values do not include any ACPI driver or OSPM code. The debug
6572 version of the code includes the debug output trace mechanism and
6573 has a much larger code and data size. Note that these values will
6574 vary depending on the efficiency of the compiler and the compiler
6575 options used during generation.
6578 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6579 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6581 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6582 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6587 Module loading/unloading fixes (John Cagle)
6590 3) iASL Compiler/Disassembler
6592 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
6594 Implemented support for the disassembly of all SMBus protocol
6595 keywords (SMBQuick, SMBWord, etc.)
6597 ----------------------------------------
6598 01 November 2002. Summary of changes for version 20021101.
6601 1) ACPI CA Core Subsystem:
6603 Fixed a problem where platforms that have a GPE1 block but no GPE0
6604 block were not handled correctly. This resulted in a "GPE
6605 overlap" error message. GPE0 is no longer required.
6607 Removed code added in the previous release that inserted nodes
6608 into the namespace in alphabetical order. This caused some side-
6609 effects on various machines. The root cause of the problem is
6610 still under investigation since in theory, the internal ordering
6611 of the namespace nodes should not matter.
6614 Enhanced error reporting for the case where a named object is not
6615 found during control method execution. The full ACPI namepath
6616 (name reference) of the object that was not found is displayed in
6619 Note: as a result of the overhaul of the namespace object types in
6620 the previous release, the namespace nodes for the predefined
6621 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
6622 instead of ACPI_TYPE_ANY. This simplifies the namespace
6623 management code but may affect code that walks the namespace tree
6624 looking for specific object types.
6626 Code and Data Size: Current core subsystem library sizes are shown
6627 below. These are the code and data sizes for the acpica.lib
6628 produced by the Microsoft Visual C++ 6.0 compiler, and these
6629 values do not include any ACPI driver or OSPM code. The debug
6630 version of the code includes the debug output trace mechanism and
6631 has a much larger code and data size. Note that these values will
6632 vary depending on the efficiency of the compiler and the compiler
6633 options used during generation.
6636 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6637 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6639 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6640 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6645 Fixed a problem introduced in the previous release where the
6646 Processor and Thermal objects were not recognized and installed in
6647 /proc. This was related to the scope type change described above.
6650 3) iASL Compiler/Disassembler
6652 Implemented the -g option to get all of the required ACPI tables
6653 from the registry and save them to files (Windows version of the
6654 compiler only.) The required tables are the FADT, FACS, and DSDT.
6656 Added ACPI table checksum validation during table disassembly in
6657 order to catch corrupted tables.
6660 ----------------------------------------
6661 22 October 2002. Summary of changes for version 20021022.
6663 1) ACPI CA Core Subsystem:
6665 Implemented a restriction on the Scope operator that the target
6666 must already exist in the namespace at the time the operator is
6667 encountered (during table load or method execution). In other
6668 words, forward references are not allowed and Scope() cannot
6669 create a new object. This changes the previous behavior where the
6670 interpreter would create the name if not found. This new behavior
6671 correctly enables the search-to-root algorithm during namespace
6672 lookup of the target name. Because of this upsearch, this fixes
6673 the known Compaq _SB_.OKEC problem and makes both the AML
6674 interpreter and iASL compiler compatible with other ACPI
6677 Completed a major overhaul of the internal ACPI object types for
6678 the ACPI Namespace and the associated operand objects. Many of
6679 these types had become obsolete with the introduction of the two-
6680 pass namespace load. This cleanup simplifies the code and makes
6681 the entire namespace load mechanism much clearer and easier to
6684 Improved debug output for tracking scope opening/closing to help
6685 diagnose scoping issues. The old scope name as well as the new
6686 scope name are displayed. Also improved error messages for
6687 problems with ASL Mutex objects and error messages for GPE
6690 Cleaned up the namespace dump code, removed obsolete code.
6692 All string output (for all namespace/object dumps) now uses the
6693 common ACPI string output procedure which handles escapes properly
6694 and does not emit non-printable characters.
6696 Fixed some issues with constants in the 64-bit version of the
6697 local C library (utclib.c)
6702 EC Driver: No longer attempts to acquire the Global Lock at
6706 3) iASL Compiler/Disassembler
6708 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
6709 2 opcodes outside of a control method. This means that the
6710 "executable" operators (versus the "namespace" operators) cannot
6711 be used at the table level; they can only be used within a control
6714 Implemented the restriction on the Scope() operator where the
6715 target must already exist in the namespace at the time the
6716 operator is encountered (during ASL compilation). In other words,
6717 forward references are not allowed and Scope() cannot create a new
6718 object. This makes the iASL compiler compatible with other ACPI
6719 implementations and makes the Scope() implementation adhere to the
6722 Fixed a problem where namepath optimization for the Alias operator
6723 was optimizing the wrong path (of the two namepaths.) This caused
6724 a "Missing alias link" error message.
6726 Fixed a problem where an "unknown reserved name" warning could be
6727 incorrectly generated for names like "_SB" when the trailing
6728 underscore is not used in the original ASL.
6730 Fixed a problem where the reserved name check did not handle
6731 NamePaths with multiple NameSegs correctly. The first nameseg of
6732 the NamePath was examined instead of the last NameSeg.
6735 ----------------------------------------
6737 02 October 2002. Summary of changes for this release.
6740 1) ACPI CA Core Subsystem version 20021002:
6742 Fixed a problem where a store/copy of a string to an existing
6743 string did not always set the string length properly in the String
6746 Fixed a reported problem with the ToString operator where the
6747 behavior was identical to the ToHexString operator instead of just
6748 simply converting a raw buffer to a string data type.
6750 Fixed a problem where CopyObject and the other "explicit"
6751 conversion operators were not updating the internal namespace node
6752 type as part of the store operation.
6754 Fixed a memory leak during implicit source operand conversion
6755 where the original object was not deleted if it was converted to a
6756 new object of a different type.
6758 Enhanced error messages for all problems associated with namespace
6759 lookups. Common procedure generates and prints the lookup name as
6760 well as the formatted status.
6762 Completed implementation of a new design for the Alias support
6763 within the namespace. The existing design did not handle the case
6764 where a new object was assigned to one of the two names due to the
6765 use of an explicit conversion operator, resulting in the two names
6766 pointing to two different objects. The new design simply points
6767 the Alias name to the original name node - not to the object.
6768 This results in a level of indirection that must be handled in the
6769 name resolution mechanism.
6771 Code and Data Size: Current core subsystem library sizes are shown
6772 below. These are the code and data sizes for the acpica.lib
6773 produced by the Microsoft Visual C++ 6.0 compiler, and these
6774 values do not include any ACPI driver or OSPM code. The debug
6775 version of the code includes the debug output trace mechanism and
6776 has a larger code and data size. Note that these values will vary
6777 depending on the efficiency of the compiler and the compiler
6778 options used during generation.
6781 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6782 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6784 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6785 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6790 Initialize thermal driver's timer before it is used. (Knut
6793 Allow handling negative celsius values. (Kochi Takayoshi)
6795 Fix thermal management and make trip points. R/W (Pavel Machek)
6797 Fix /proc/acpi/sleep. (P. Christeas)
6799 IA64 fixes. (David Mosberger)
6801 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
6803 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
6807 3) iASL Compiler/Disassembler
6809 Clarified some warning/error messages.
6812 ----------------------------------------
6813 18 September 2002. Summary of changes for this release.
6816 1) ACPI CA Core Subsystem version 20020918:
6818 Fixed a reported problem with reference chaining (via the Index()
6819 and RefOf() operators) in the ObjectType() and SizeOf() operators.
6820 The definition of these operators includes the dereferencing of
6821 all chained references to return information on the base object.
6823 Fixed a problem with stores to indexed package elements - the
6824 existing code would not complete the store if an "implicit
6825 conversion" was not performed. In other words, if the existing
6826 object (package element) was to be replaced completely, the code
6827 didn't handle this case.
6829 Relaxed typechecking on the ASL "Scope" operator to allow the
6830 target name to refer to an object of type Integer, String, or
6831 Buffer, in addition to the scoping object types (Device,
6832 predefined Scopes, Processor, PowerResource, and ThermalZone.)
6833 This allows existing AML code that has workarounds for a bug in
6834 Windows to function properly. A warning is issued, however. This
6835 affects both the AML interpreter and the iASL compiler. Below is
6836 an example of this type of ASL code:
6842 Fixed some reported problems with 64-bit integer support in the
6843 local implementation of C library functions (clib.c)
6848 Use ACPI fix map region instead of IOAPIC region, since it is
6849 undefined in non-SMP.
6851 Ensure that the SCI has the proper polarity and trigger, even on
6852 systems that do not have an interrupt override entry in the MADT.
6854 2.5 big driver reorganization (Pat Mochel)
6856 Use early table mapping code from acpitable.c (Andi Kleen)
6858 New blacklist entries (Andi Kleen)
6860 Blacklist improvements. Split blacklist code out into a separate
6861 file. Move checking the blacklist to very early. Previously, we
6862 would use ACPI tables, and then halfway through init, check the
6863 blacklist -- too late. Now, it's early enough to completely fall-
6867 3) iASL Compiler/Disassembler version 20020918:
6869 Fixed a problem where the typechecking code didn't know that an
6870 alias could point to a method. In other words, aliases were not
6871 being dereferenced during typechecking.
6874 ----------------------------------------
6875 29 August 2002. Summary of changes for this release.
6877 1) ACPI CA Core Subsystem Version 20020829:
6879 If the target of a Scope() operator already exists, it must be an
6880 object type that actually opens a scope -- such as a Device,
6881 Method, Scope, etc. This is a fatal runtime error. Similar error
6882 check has been added to the iASL compiler also.
6884 Tightened up the namespace load to disallow multiple names in the
6885 same scope. This previously was allowed if both objects were of
6886 the same type. (i.e., a lookup was the same as entering a new
6892 Ensure that the ACPI interrupt has the proper trigger and
6895 local_irq_disable is extraneous. (Matthew Wilcox)
6897 Make "acpi=off" actually do what it says, and not use the ACPI
6898 interpreter *or* the tables.
6900 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
6904 3) iASL Compiler/Disassembler Version 20020829:
6906 Implemented namepath optimization for name declarations. For
6907 example, a declaration like "Method (\_SB_.ABCD)" would get
6908 optimized to "Method (ABCD)" if the declaration is within the
6909 \_SB_ scope. This optimization is in addition to the named
6910 reference path optimization first released in the previous
6911 version. This would seem to complete all possible optimizations
6912 for namepaths within the ASL/AML.
6914 If the target of a Scope() operator already exists, it must be an
6915 object type that actually opens a scope -- such as a Device,
6918 Implemented a check and warning for unreachable code in the same
6919 block below a Return() statement.
6921 Fixed a problem where the listing file was not generated if the
6922 compiler aborted if the maximum error count was exceeded (200).
6924 Fixed a problem where the typechecking of method return values was
6925 broken. This includes the check for a return value when the
6926 method is invoked as a TermArg (a return value is expected.)
6928 Fixed a reported problem where EOF conditions during a quoted
6929 string or comment caused a fault.
6932 ----------------------------------------
6933 15 August 2002. Summary of changes for this release.
6935 1) ACPI CA Core Subsystem Version 20020815:
6937 Fixed a reported problem where a Store to a method argument that
6938 contains a reference did not perform the indirect store correctly.
6939 This problem was created during the conversion to the new
6940 reference object model - the indirect store to a method argument
6941 code was not updated to reflect the new model.
6943 Reworked the ACPI mode change code to better conform to ACPI 2.0,
6944 handle corner cases, and improve code legibility (Kochi Takayoshi)
6946 Fixed a problem with the pathname parsing for the carat (^)
6947 prefix. The heavy use of the carat operator by the new namepath
6948 optimization in the iASL compiler uncovered a problem with the AML
6949 interpreter handling of this prefix. In the case where one or
6950 more carats precede a single nameseg, the nameseg was treated as
6951 standalone and the search rule (to root) was inadvertently
6952 applied. This could cause both the iASL compiler and the
6953 interpreter to find the wrong object or to miss the error that
6954 should occur if the object does not exist at that exact pathname.
6956 Found and fixed the problem where the HP Pavilion DSDT would not
6957 load. This was a relatively minor tweak to the table loading code
6958 (a problem caused by the unexpected encounter with a method
6959 invocation not within a control method), but it does not solve the
6960 overall issue of the execution of AML code at the table level.
6961 This investigation is still ongoing.
6963 Code and Data Size: Current core subsystem library sizes are shown
6964 below. These are the code and data sizes for the acpica.lib
6965 produced by the Microsoft Visual C++ 6.0 compiler, and these
6966 values do not include any ACPI driver or OSPM code. The debug
6967 version of the code includes the debug output trace mechanism and
6968 has a larger code and data size. Note that these values will vary
6969 depending on the efficiency of the compiler and the compiler
6970 options used during generation.
6973 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
6974 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
6976 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6977 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6982 Remove redundant slab.h include (Brad Hards)
6984 Fix several bugs in thermal.c (Herbert Nachtnebel)
6986 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
6988 Change acpi_system_suspend to use updated irq functions (Pavel
6991 Export acpi_get_firmware_table (Matthew Wilcox)
6993 Use proper root proc entry for ACPI (Kochi Takayoshi)
6995 Fix early-boot table parsing (Bjorn Helgaas)
6998 3) iASL Compiler/Disassembler
7000 Reworked the compiler options to make them more consistent and to
7001 use two-letter options where appropriate. We were running out of
7002 sensible letters. This may break some makefiles, so check the
7003 current options list by invoking the compiler with no parameters.
7005 Completed the design and implementation of the ASL namepath
7006 optimization option for the compiler. This option optimizes all
7007 references to named objects to the shortest possible path. The
7008 first attempt tries to utilize a single nameseg (4 characters) and
7009 the "search-to-root" algorithm used by the interpreter. If that
7010 cannot be used (because either the name is not in the search path
7011 or there is a conflict with another object with the same name),
7012 the pathname is optimized using the carat prefix (usually a
7013 shorter string than specifying the entire path from the root.)
7015 Implemented support to obtain the DSDT from the Windows registry
7016 (when the disassembly option is specified with no input file).
7017 Added this code as the implementation for AcpiOsTableOverride in
7018 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
7019 utility) to scan memory for the DSDT to the AcpiOsTableOverride
7020 function in the DOS OSL to make the disassembler truly OS
7023 Implemented a new option to disassemble and compile in one step.
7024 When used without an input filename, this option will grab the
7025 DSDT from the local machine, disassemble it, and compile it in one
7028 Added a warning message for invalid escapes (a backslash followed
7029 by any character other than the allowable escapes). This catches
7030 the quoted string error "\_SB_" (which should be "\\_SB_" ).
7032 Also, there are numerous instances in the ACPI specification where
7035 Added a compiler option to disable all optimizations. This is
7036 basically the "compatibility mode" because by using this option,
7037 the AML code will come out exactly the same as other ASL
7040 Added error messages for incorrectly ordered dependent resource
7041 functions. This includes: missing EndDependentFn macro at end of
7042 dependent resource list, nested dependent function macros (both
7043 start and end), and missing StartDependentFn macro. These are
7044 common errors that should be caught at compile time.
7046 Implemented _OSI support for the disassembler and compiler. _OSI
7047 must be included in the namespace for proper disassembly (because
7048 the disassembler must know the number of arguments.)
7050 Added an "optimization" message type that is optional (off by
7051 default). This message is used for all optimizations - including
7052 constant folding, integer optimization, and namepath optimization.
7054 ----------------------------------------
7055 25 July 2002. Summary of changes for this release.
7058 1) ACPI CA Core Subsystem Version 20020725:
7060 The AML Disassembler has been enhanced to produce compilable ASL
7061 code and has been integrated into the iASL compiler (see below) as
7062 well as the single-step disassembly for the AML debugger and the
7063 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
7064 resource templates and macros are fully supported. The
7065 disassembler has been tested on over 30 different AML files,
7066 producing identical AML when the resulting disassembled ASL file
7067 is recompiled with the same ASL compiler.
7069 Modified the Resource Manager to allow zero interrupts and zero
7070 dma channels during the GetCurrentResources call. This was
7071 causing problems on some platforms.
7073 Added the AcpiOsRedirectOutput interface to the OSL to simplify
7074 output redirection for the AcpiOsPrintf and AcpiOsVprintf
7077 Code and Data Size: Current core subsystem library sizes are shown
7078 below. These are the code and data sizes for the acpica.lib
7079 produced by the Microsoft Visual C++ 6.0 compiler, and these
7080 values do not include any ACPI driver or OSPM code. The debug
7081 version of the code includes the debug output trace mechanism and
7082 has a larger code and data size. Note that these values will vary
7083 depending on the efficiency of the compiler and the compiler
7084 options used during generation.
7087 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7088 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7090 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7091 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7096 Fixed a panic in the EC driver (Dominik Brodowski)
7098 Implemented checksum of the R/XSDT itself during Linux table scan
7104 The AML disassembler is integrated into the compiler. The "-d"
7105 option invokes the disassembler to completely disassemble an
7106 input AML file, producing as output a text ASL file with the
7107 extension ".dsl" (to avoid name collisions with existing .asl
7108 source files.) A future enhancement will allow the disassembler
7109 to obtain the BIOS DSDT from the registry under Windows.
7111 Fixed a problem with the VendorShort and VendorLong resource
7112 descriptors where an invalid AML sequence was created.
7114 Implemented a fix for BufferData term in the ASL parser. It was
7115 inadvertently defined twice, allowing invalid syntax to pass and
7116 causing reduction conflicts.
7118 Fixed a problem where the Ones opcode could get converted to a
7119 value of zero if "Ones" was used where a byte, word or dword value
7120 was expected. The 64-bit value is now truncated to the correct
7121 size with the correct value.
7125 ----------------------------------------
7126 02 July 2002. Summary of changes for this release.
7129 1) ACPI CA Core Subsystem Version 20020702:
7131 The Table Manager code has been restructured to add several new
7132 features. Tables that are not required by the core subsystem
7133 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
7134 validated in any way and are returned from AcpiGetFirmwareTable if
7135 requested. The AcpiOsTableOverride interface is now called for
7136 each table that is loaded by the subsystem in order to allow the
7137 host to override any table it chooses. Previously, only the DSDT
7138 could be overridden. Added one new files, tbrsdt.c and
7141 Fixed a problem with the conversion of internal package objects to
7142 external objects (when a package is returned from a control
7143 method.) The return buffer length was set to zero instead of the
7144 proper length of the package object.
7146 Fixed a reported problem with the use of the RefOf and DeRefOf
7147 operators when passing reference arguments to control methods. A
7148 new type of Reference object is used internally for references
7149 produced by the RefOf operator.
7151 Added additional error messages in the Resource Manager to explain
7152 AE_BAD_DATA errors when they occur during resource parsing.
7154 Split the AcpiEnableSubsystem into two primitives to enable a
7155 finer granularity initialization sequence. These two calls should
7156 be called in this order: AcpiEnableSubsystem (flags),
7157 AcpiInitializeObjects (flags). The flags parameter remains the
7163 Updated the ACPI utilities module to understand the new style of
7164 fully resolved package objects that are now returned from the core
7165 subsystem. This eliminates errors of the form:
7167 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
7168 acpi_utils-0430 [145] acpi_evaluate_reference:
7169 Invalid element in package (not a device reference)
7171 The method evaluation utility uses the new buffer allocation
7172 scheme instead of calling AcpiEvaluate Object twice.
7174 Added support for ECDT. This allows the use of the Embedded
7176 Controller before the namespace has been fully initialized, which
7177 is necessary for ACPI 2.0 support, and for some laptops to
7178 initialize properly. (Laptops using ECDT are still rare, so only
7179 limited testing was performed of the added functionality.)
7181 Fixed memory leaks in the EC driver.
7183 Eliminated a brittle code structure in acpi_bus_init().
7185 Eliminated the acpi_evaluate() helper function in utils.c. It is
7186 no longer needed since acpi_evaluate_object can optionally
7187 allocate memory for the return object.
7189 Implemented fix for keyboard hang when getting battery readings on
7190 some systems (Stephen White)
7192 PCI IRQ routing update (Dominik Brodowski)
7194 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
7197 ----------------------------------------
7198 11 June 2002. Summary of changes for this release.
7201 1) ACPI CA Core Subsystem Version 20020611:
7203 Fixed a reported problem where constants such as Zero and One
7204 appearing within _PRT packages were not handled correctly within
7205 the resource manager code. Originally reported against the ASL
7206 compiler because the code generator now optimizes integers to
7207 their minimal AML representation (i.e. AML constants if possible.)
7208 The _PRT code now handles all AML constant opcodes correctly
7209 (Zero, One, Ones, Revision).
7211 Fixed a problem with the Concatenate operator in the AML
7212 interpreter where a buffer result object was incorrectly marked as
7213 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
7215 All package sub-objects are now fully resolved before they are
7216 returned from the external ACPI interfaces. This means that name
7217 strings are resolved to object handles, and constant operators
7218 (Zero, One, Ones, Revision) are resolved to Integers.
7220 Implemented immediate resolution of the AML Constant opcodes
7221 (Zero, One, Ones, Revision) to Integer objects upon detection
7222 within the AML stream. This has simplified and reduced the
7223 generated code size of the subsystem by eliminating about 10
7224 switch statements for these constants (which previously were
7225 contained in Reference objects.) The complicating issues are that
7226 the Zero opcode is used as a "placeholder" for unspecified
7227 optional target operands and stores to constants are defined to be
7230 Code and Data Size: Current core subsystem library sizes are shown
7231 below. These are the code and data sizes for the acpica.lib
7232 produced by the Microsoft Visual C++ 6.0 compiler, and these
7233 values do not include any ACPI driver or OSPM code. The debug
7234 version of the code includes the debug output trace mechanism and
7235 has a larger code and data size. Note that these values will vary
7236 depending on the efficiency of the compiler and the compiler
7237 options used during generation.
7240 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7241 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7243 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7244 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7250 Added preliminary support for obtaining _TRA data for PCI root
7251 bridges (Bjorn Helgaas).
7254 3) iASL Compiler Version X2046:
7256 Fixed a problem where the "_DDN" reserved name was defined to be a
7257 control method with one argument. There are no arguments, and
7258 _DDN does not have to be a control method.
7260 Fixed a problem with the Linux version of the compiler where the
7261 source lines printed with error messages were the wrong lines.
7262 This turned out to be the "LF versus CR/LF" difference between
7263 Windows and Unix. This appears to be the longstanding issue
7264 concerning listing output and error messages.
7266 Fixed a problem with the Linux version of compiler where opcode
7267 names within error messages were wrong. This was caused by a
7268 slight difference in the output of the Flex tool on Linux versus
7271 Fixed a problem with the Linux compiler where the hex output files
7272 contained some garbage data caused by an internal buffer overrun.
7275 ----------------------------------------
7276 17 May 2002. Summary of changes for this release.
7279 1) ACPI CA Core Subsystem Version 20020517:
7281 Implemented a workaround to an BIOS bug discovered on the HP
7282 OmniBook where the FADT revision number and the table size are
7283 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
7284 behavior is to fallback to using only the ACPI 1.0 fields of the
7285 FADT if the table is too small to be a ACPI 2.0 table as claimed
7286 by the revision number. Although this is a BIOS bug, this is a
7287 case where the workaround is simple enough and with no side
7288 effects, so it seemed prudent to add it. A warning message is
7291 Implemented minimum size checks for the fixed-length ACPI tables -
7292 - the FADT and FACS, as well as consistency checks between the
7293 revision number and the table size.
7295 Fixed a reported problem in the table override support where the
7296 new table pointer was incorrectly treated as a physical address
7297 instead of a logical address.
7299 Eliminated the use of the AE_AML_ERROR exception and replaced it
7300 with more descriptive codes.
7302 Fixed a problem where an exception would occur if an ASL Field was
7303 defined with no named Field Units underneath it (used by some
7306 Code and Data Size: Current core subsystem library sizes are shown
7307 below. These are the code and data sizes for the acpica.lib
7308 produced by the Microsoft Visual C++ 6.0 compiler, and these
7309 values do not include any ACPI driver or OSPM code. The debug
7310 version of the code includes the debug output trace mechanism and
7311 has a larger code and data size. Note that these values will vary
7312 depending on the efficiency of the compiler and the compiler
7313 options used during generation.
7316 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7317 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7319 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7320 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7326 Much work done on ACPI init (MADT and PCI IRQ routing support).
7327 (Paul D. and Dominik Brodowski)
7329 Fix PCI IRQ-related panic on boot (Sam Revitch)
7331 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
7333 Fix "MHz" typo (Dominik Brodowski)
7335 Fix RTC year 2000 issue (Dominik Brodowski)
7337 Preclude multiple button proc entries (Eric Brunet)
7339 Moved arch-specific code out of include/platform/aclinux.h
7341 3) iASL Compiler Version X2044:
7343 Implemented error checking for the string used in the EISAID macro
7344 (Usually used in the definition of the _HID object.) The code now
7345 strictly enforces the PnP format - exactly 7 characters, 3
7346 uppercase letters and 4 hex digits.
7348 If a raw string is used in the definition of the _HID object
7349 (instead of the EISAID macro), the string must contain all
7350 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7353 Implemented checking for invalid use of ACPI reserved names for
7354 most of the name creation operators (Name, Device, Event, Mutex,
7355 OperationRegion, PowerResource, Processor, and ThermalZone.)
7356 Previously, this check was only performed for control methods.
7358 Implemented an additional check on the Name operator to emit an
7359 error if a reserved name that must be implemented in ASL as a
7360 control method is used. We know that a reserved name must be a
7361 method if it is defined with input arguments.
7363 The warning emitted when a namespace object reference is not found
7364 during the cross reference phase has been changed into an error.
7365 The "External" directive should be used for names defined in other
7369 4) Tools and Utilities
7371 The 16-bit tools (adump16 and aexec16) have been regenerated and
7374 Fixed a problem with the output of both acpidump and adump16 where
7375 the indentation of closing parentheses and brackets was not
7377 aligned properly with the parent block.
7380 ----------------------------------------
7381 03 May 2002. Summary of changes for this release.
7384 1) ACPI CA Core Subsystem Version 20020503:
7386 Added support a new OSL interface that allows the host operating
7388 system software to override the DSDT found in the firmware -
7389 AcpiOsTableOverride. With this interface, the OSL can examine the
7390 version of the firmware DSDT and replace it with a different one
7393 Added new external interfaces for accessing ACPI registers from
7394 device drivers and other system software - AcpiGetRegister and
7395 AcpiSetRegister. This was simply an externalization of the
7396 existing AcpiHwBitRegister interfaces.
7398 Fixed a regression introduced in the previous build where the
7399 ASL/AML CreateField operator always returned an error,
7400 "destination must be a NS Node".
7402 Extended the maximum time (before failure) to successfully enable
7403 ACPI mode to 3 seconds.
7405 Code and Data Size: Current core subsystem library sizes are shown
7406 below. These are the code and data sizes for the acpica.lib
7407 produced by the Microsoft Visual C++ 6.0 compiler, and these
7408 values do not include any ACPI driver or OSPM code. The debug
7409 version of the code includes the debug output trace mechanism and
7410 has a larger code and data size. Note that these values will vary
7411 depending on the efficiency of the compiler and the compiler
7412 options used during generation.
7415 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7416 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7418 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7419 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7424 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
7425 free. While 3 out of 4 of our in-house systems work fine, the last
7426 one still hangs when testing the LAPIC timer.
7428 Renamed many files in 2.5 kernel release to omit "acpi_" from the
7431 Added warning on boot for Presario 711FR.
7433 Sleep improvements (Pavel Machek)
7435 ACPI can now be built without CONFIG_PCI enabled.
7437 IA64: Fixed memory map functions (JI Lee)
7440 3) iASL Compiler Version X2043:
7442 Added support to allow the compiler to be integrated into the MS
7443 VC++ development environment for one-button compilation of single
7444 files or entire projects -- with error-to-source-line mapping.
7446 Implemented support for compile-time constant folding for the
7447 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
7448 specification. This allows the ASL writer to use expressions
7449 instead of Integer/Buffer/String constants in terms that must
7450 evaluate to constants at compile time and will also simplify the
7451 emitted AML in any such sub-expressions that can be folded
7452 (evaluated at compile-time.) This increases the size of the
7453 compiler significantly because a portion of the ACPI CA AML
7454 interpreter is included within the compiler in order to pre-
7455 evaluate constant expressions.
7458 Fixed a problem with the "Unicode" ASL macro that caused the
7459 compiler to fault. (This macro is used in conjunction with the
7460 _STR reserved name.)
7462 Implemented an AML opcode optimization to use the Zero, One, and
7463 Ones opcodes where possible to further reduce the size of integer
7464 constants and thus reduce the overall size of the generated AML
7467 Implemented error checking for new reserved terms for ACPI version
7470 Implemented the -qr option to display the current list of ACPI
7471 reserved names known to the compiler.
7473 Implemented the -qc option to display the current list of ASL
7474 operators that are allowed within constant expressions and can
7475 therefore be folded at compile time if the operands are constants.
7480 Updated the Programmer's Reference for new interfaces, data types,
7481 and memory allocation model options.
7483 Updated the iASL Compiler User Reference to apply new format and
7484 add information about new features and options.
7486 ----------------------------------------
7487 19 April 2002. Summary of changes for this release.
7489 1) ACPI CA Core Subsystem Version 20020419:
7491 The source code base for the Core Subsystem has been completely
7492 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
7493 versions. The Lint option files used are included in the
7494 /acpi/generate/lint directory.
7496 Implemented enhanced status/error checking across the entire
7497 Hardware manager subsystem. Any hardware errors (reported from
7498 the OSL) are now bubbled up and will abort a running control
7502 Fixed a problem where the per-ACPI-table integer width (32 or 64)
7503 was stored only with control method nodes, causing a fault when
7504 non-control method code was executed during table loading. The
7505 solution implemented uses a global variable to indicate table
7506 width across the entire ACPI subsystem. Therefore, ACPI CA does
7507 not support mixed integer widths across different ACPI tables
7510 Fixed a problem where NULL extended fields (X fields) in an ACPI
7511 2.0 ACPI FADT caused the table load to fail. Although the
7512 existing ACPI specification is a bit fuzzy on this topic, the new
7513 behavior is to fall back on a ACPI 1.0 field if the corresponding
7514 ACPI 2.0 X field is zero (even though the table revision indicates
7515 a full ACPI 2.0 table.) The ACPI specification will be updated to
7518 Fixed a problem with the SystemMemory operation region handler
7519 where memory was always accessed byte-wise even if the AML-
7520 specified access width was larger than a byte. This caused
7521 problems on systems with memory-mapped I/O. Memory is now
7522 accessed with the width specified. On systems that do not support
7523 non-aligned transfers, a check is made to guarantee proper address
7524 alignment before proceeding in order to avoid an AML-caused
7525 alignment fault within the kernel.
7528 Fixed a problem with the ExtendedIrq resource where only one byte
7529 of the 4-byte Irq field was extracted.
7531 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
7532 function was out of date and required a rewrite.
7534 Code and Data Size: Current core subsystem library sizes are shown
7535 below. These are the code and data sizes for the acpica.lib
7536 produced by the Microsoft Visual C++ 6.0 compiler, and these
7537 values do not include any ACPI driver or OSPM code. The debug
7538 version of the code includes the debug output trace mechanism and
7539 has a larger code and data size. Note that these values will vary
7540 depending on the efficiency of the compiler and the compiler
7541 options used during generation.
7544 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7545 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7547 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7548 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7553 PCI IRQ routing fixes (Dominik Brodowski)
7556 3) iASL Compiler Version X2042:
7558 Implemented an additional compile-time error check for a field
7559 unit whose size + minimum access width would cause a run-time
7560 access beyond the end-of-region. Previously, only the field size
7563 The Core subsystem and iASL compiler now share a common parse
7564 object in preparation for compile-time evaluation of the type
7565 3/4/5 ASL operators.
7568 ----------------------------------------
7569 Summary of changes for this release: 03_29_02
7571 1) ACPI CA Core Subsystem Version 20020329:
7573 Implemented support for late evaluation of TermArg operands to
7574 Buffer and Package objects. This allows complex expressions to be
7575 used in the declarations of these object types.
7577 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
7578 1.0, if the field was larger than 32 bits, it was returned as a
7579 buffer - otherwise it was returned as an integer. In ACPI 2.0,
7580 the field is returned as a buffer only if the field is larger than
7581 64 bits. The TableRevision is now considered when making this
7582 conversion to avoid incompatibility with existing ASL code.
7584 Implemented logical addressing for AcpiOsGetRootPointer. This
7585 allows an RSDP with either a logical or physical address. With
7586 this support, the host OS can now override all ACPI tables with
7587 one logical RSDP. Includes implementation of "typed" pointer
7588 support to allow a common data type for both physical and logical
7589 pointers internally. This required a change to the
7590 AcpiOsGetRootPointer interface.
7592 Implemented the use of ACPI 2.0 Generic Address Structures for all
7593 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
7594 mapped I/O for these ACPI features.
7596 Initialization now ignores not only non-required tables (All
7597 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
7598 not validate the table headers of unrecognized tables.
7600 Fixed a problem where a notify handler could only be
7601 installed/removed on an object of type Device. All "notify"
7603 objects are now supported -- Devices, Processor, Power, and
7606 Removed most verbosity from the ACPI_DB_INFO debug level. Only
7607 critical information is returned when this debug level is enabled.
7609 Code and Data Size: Current core subsystem library sizes are shown
7610 below. These are the code and data sizes for the acpica.lib
7611 produced by the Microsoft Visual C++ 6.0 compiler, and these
7612 values do not include any ACPI driver or OSPM code. The debug
7613 version of the code includes the debug output trace mechanism and
7614 has a larger code and data size. Note that these values will vary
7615 depending on the efficiency of the compiler and the compiler
7616 options used during generation.
7619 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7620 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7622 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7623 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7628 The processor driver (acpi_processor.c) now fully supports ACPI
7629 2.0-based processor performance control (e.g. Intel(R)
7630 SpeedStep(TM) technology) Note that older laptops that only have
7631 the Intel "applet" interface are not supported through this. The
7632 'limit' and 'performance' interface (/proc) are fully functional.
7633 [Note that basic policy for controlling performance state
7634 transitions will be included in the next version of ospmd.] The
7635 idle handler was modified to more aggressively use C2, and PIIX4
7636 errata handling underwent a complete overhaul (big thanks to
7639 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
7640 based devices in the ACPI namespace are now dynamically bound
7641 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
7642 This allows, among other things, ACPI to resolve bus numbers for
7643 subordinate PCI bridges.
7645 Enhanced PCI IRQ routing to get the proper bus number for _PRT
7646 entries defined underneath PCI bridges.
7648 Added IBM 600E to bad bios list due to invalid _ADR value for
7649 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
7651 In the process of adding full MADT support (e.g. IOAPIC) for IA32
7652 (acpi.c, mpparse.c) -- stay tuned.
7654 Added back visual differentiation between fixed-feature and
7655 control-method buttons in dmesg. Buttons are also subtyped (e.g.
7656 button/power/PWRF) to simplify button identification.
7658 We no longer use -Wno-unused when compiling debug. Please ignore
7659 any "_THIS_MODULE defined but not used" messages.
7661 Can now shut down the system using "magic sysrq" key.
7664 3) iASL Compiler version 2041:
7666 Fixed a problem where conversion errors for hex/octal/decimal
7667 constants were not reported.
7669 Implemented a fix for the General Register template Address field.
7670 This field was 8 bits when it should be 64.
7672 Fixed a problem where errors/warnings were no longer being emitted
7673 within the listing output file.
7675 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
7676 exactly 4 characters, alphanumeric only.
7681 ----------------------------------------
7682 Summary of changes for this release: 03_08_02
7685 1) ACPI CA Core Subsystem Version 20020308:
7687 Fixed a problem with AML Fields where the use of the "AccessAny"
7688 keyword could cause an interpreter error due to attempting to read
7689 or write beyond the end of the parent Operation Region.
7691 Fixed a problem in the SystemMemory Operation Region handler where
7692 an attempt was made to map memory beyond the end of the region.
7693 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
7694 errors on some Linux systems.
7696 Fixed a problem where the interpreter/namespace "search to root"
7697 algorithm was not functioning for some object types. Relaxed the
7698 internal restriction on the search to allow upsearches for all
7699 external object types as well as most internal types.
7704 We now use safe_halt() macro versus individual calls to sti | hlt.
7706 Writing to the processor limit interface should now work. "echo 1"
7707 will increase the limit, 2 will decrease, and 0 will reset to the
7714 Fixed segfault on Linux version.
7717 ----------------------------------------
7718 Summary of changes for this release: 02_25_02
7720 1) ACPI CA Core Subsystem:
7723 Fixed a problem where the GPE bit masks were not initialized
7724 properly, causing erratic GPE behavior.
7726 Implemented limited support for multiple calling conventions. The
7727 code can be generated with either the VPL (variable parameter
7728 list, or "C") convention, or the FPL (fixed parameter list, or
7729 "Pascal") convention. The core subsystem is about 3.4% smaller
7730 when generated with FPL.
7735 Re-add some /proc/acpi/event functionality that was lost during
7738 Resolved issue with /proc events for fixed-feature buttons showing
7739 up as the system device.
7741 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
7743 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
7745 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
7747 Fixed limit interface & usage to fix bugs with passive cooling
7750 Restructured PRT support.
7753 ----------------------------------------
7754 Summary of changes for this label: 02_14_02
7757 1) ACPI CA Core Subsystem:
7759 Implemented support in AcpiLoadTable to allow loading of FACS and
7762 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
7763 been removed. All 64-bit platforms should be migrated to the ACPI
7764 2.0 tables. The actbl71.h header has been removed from the source
7767 All C macros defined within the subsystem have been prefixed with
7768 "ACPI_" to avoid collision with other system include files.
7770 Removed the return value for the two AcpiOsPrint interfaces, since
7771 it is never used and causes lint warnings for ignoring the return
7774 Added error checking to all internal mutex acquire and release
7775 calls. Although a failure from one of these interfaces is
7776 probably a fatal system error, these checks will cause the
7777 immediate abort of the currently executing method or interface.
7779 Fixed a problem where the AcpiSetCurrentResources interface could
7780 fault. This was a side effect of the deployment of the new memory
7783 Fixed a couple of problems with the Global Lock support introduced
7784 in the last major build. The "common" (1.0/2.0) internal FACS was
7785 being overwritten with the FACS signature and clobbering the
7786 Global Lock pointer. Also, the actual firmware FACS was being
7787 unmapped after construction of the "common" FACS, preventing
7788 access to the actual Global Lock field within it. The "common"
7789 internal FACS is no longer installed as an actual ACPI table; it
7790 is used simply as a global.
7792 Code and Data Size: Current core subsystem library sizes are shown
7793 below. These are the code and data sizes for the acpica.lib
7794 produced by the Microsoft Visual C++ 6.0 compiler, and these
7795 values do not include any ACPI driver or OSPM code. The debug
7796 version of the code includes the debug output trace mechanism and
7797 has a larger code and data size. Note that these values will vary
7798 depending on the efficiency of the compiler and the compiler
7799 options used during generation.
7801 Previous Release (02_07_01)
7802 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7803 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7805 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7806 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7811 Updated Linux-specific code for core macro and OSL interface
7812 changes described above.
7814 Improved /proc/acpi/event. It now can be opened only once and has
7815 proper poll functionality.
7817 Fixed and restructured power management (acpi_bus).
7819 Only create /proc "view by type" when devices of that class exist.
7821 Fixed "charging/discharging" bug (and others) in acpi_battery.
7823 Improved thermal zone code.
7826 3) ASL Compiler, version X2039:
7829 Implemented the new compiler restriction on ASL String hex/octal
7830 escapes to non-null, ASCII values. An error results if an invalid
7831 value is used. (This will require an ACPI 2.0 specification
7834 AML object labels that are output to the optional C and ASM source
7835 are now prefixed with both the ACPI table signature and table ID
7836 to help guarantee uniqueness within a large BIOS project.
7839 ----------------------------------------
7840 Summary of changes for this label: 02_01_02
7842 1) ACPI CA Core Subsystem:
7844 ACPI 2.0 support is complete in the entire Core Subsystem and the
7845 ASL compiler. All new ACPI 2.0 operators are implemented and all
7846 other changes for ACPI 2.0 support are complete. With
7847 simultaneous code and data optimizations throughout the subsystem,
7848 ACPI 2.0 support has been implemented with almost no additional
7849 cost in terms of code and data size.
7851 Implemented a new mechanism for allocation of return buffers. If
7852 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
7853 be allocated on behalf of the caller. Consolidated all return
7854 buffer validation and allocation to a common procedure. Return
7855 buffers will be allocated via the primary OSL allocation interface
7856 since it appears that a separate pool is not needed by most users.
7857 If a separate pool is required for these buffers, the caller can
7858 still use the original mechanism and pre-allocate the buffer(s).
7860 Implemented support for string operands within the DerefOf
7863 Restructured the Hardware and Event managers to be table driven,
7864 simplifying the source code and reducing the amount of generated
7867 Split the common read/write low-level ACPI register bitfield
7868 procedure into a separate read and write, simplifying the code
7871 Obsoleted the AcpiOsCallocate OSL interface. This interface was
7872 used only a handful of times and didn't have enough critical mass
7873 for a separate interface. Replaced with a common calloc procedure
7876 Fixed a reported problem with the GPE number mapping mechanism
7877 that allows GPE1 numbers to be non-contiguous with GPE0.
7878 Reorganized the GPE information and shrunk a large array that was
7879 originally large enough to hold info for all possible GPEs (256)
7880 to simply large enough to hold all GPEs up to the largest GPE
7881 number on the machine.
7883 Fixed a reported problem with resource structure alignment on 64-
7886 Changed the AcpiEnableEvent and AcpiDisableEvent external
7887 interfaces to not require any flags for the common case of
7888 enabling/disabling a GPE.
7890 Implemented support to allow a "Notify" on a Processor object.
7892 Most TBDs in comments within the source code have been resolved
7896 Fixed a problem in the interpreter where a standalone parent
7897 prefix (^) was not handled correctly in the interpreter and
7900 Removed obsolete and unnecessary GPE save/restore code.
7902 Implemented Field support in the ASL Load operator. This allows a
7903 table to be loaded from a named field, in addition to loading a
7904 table directly from an Operation Region.
7906 Implemented timeout and handle support in the external Global Lock
7909 Fixed a problem in the AcpiDump utility where pathnames were no
7910 longer being generated correctly during the dump of named objects.
7912 Modified the AML debugger to give a full display of if/while
7913 predicates instead of just one AML opcode at a time. (The
7914 predicate can have several nested ASL statements.) The old method
7915 was confusing during single stepping.
7917 Code and Data Size: Current core subsystem library sizes are shown
7918 below. These are the code and data sizes for the acpica.lib
7919 produced by the Microsoft Visual C++ 6.0 compiler, and these
7920 values do not include any ACPI driver or OSPM code. The debug
7921 version of the code includes the debug output trace mechanism and
7922 has a larger code and data size. Note that these values will vary
7923 depending on the efficiency of the compiler and the compiler
7924 options used during generation.
7926 Previous Release (12_18_01)
7927 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
7928 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
7930 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7931 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7935 Implemented fix for PIIX reverse throttling errata (Processor
7938 Added new Limit interface (Processor and Thermal drivers)
7940 New thermal policy (Thermal driver)
7942 Many updates to /proc
7944 Battery "low" event support (Battery driver)
7946 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
7948 IA32 - IA64 initialization unification, no longer experimental
7950 Menuconfig options redesigned
7952 3) ASL Compiler, version X2037:
7954 Implemented several new output features to simplify integration of
7955 AML code into firmware: 1) Output the AML in C source code with
7956 labels for each named ASL object. The original ASL source code
7957 is interleaved as C comments. 2) Output the AML in ASM source code
7958 with labels and interleaved ASL source. 3) Output the AML in
7959 raw hex table form, in either C or ASM.
7961 Implemented support for optional string parameters to the
7964 Completed support for embedded escape sequences within string
7965 literals. The compiler now supports all single character escapes
7966 as well as the Octal and Hex escapes. Note: the insertion of a
7967 null byte into a string literal (via the hex/octal escape) causes
7968 the string to be immediately terminated. A warning is issued.
7970 Fixed a problem where incorrect AML was generated for the case
7971 where an ASL namepath consists of a single parent prefix (
7973 ) with no trailing name segments.
7975 The compiler has been successfully generated with a 64-bit C
7981 ----------------------------------------
7982 Summary of changes for this label: 12_18_01
7986 Enhanced blacklist with reason and severity fields. Any table's
7987 signature may now be used to identify a blacklisted system.
7989 Call _PIC control method to inform the firmware which interrupt
7990 model the OS is using. Turn on any disabled link devices.
7992 Cleaned up busmgr /proc error handling (Andreas Dilger)
7994 2) ACPI CA Core Subsystem:
7996 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
7999 Completed implementation of the ACPI 2.0 "Continue",
8000 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
8001 operators. All new ACPI 2.0 operators are now implemented in both
8002 the ASL compiler and the AML interpreter. The only remaining ACPI
8003 2.0 task is support for the String data type in the DerefOf
8004 operator. Fixed a problem with AcquireMutex where the status code
8005 was lost if the caller had to actually wait for the mutex.
8007 Increased the maximum ASL Field size from 64K bits to 4G bits.
8009 Completed implementation of the external Global Lock interfaces --
8010 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
8011 Handler parameters were added.
8013 Completed another pass at removing warnings and issues when
8014 compiling with 64-bit compilers. The code now compiles cleanly
8015 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
8016 add and subtract (diff) macros have changed considerably.
8019 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
8020 64-bit platforms, 32-bits on all others. This type is used
8021 wherever memory allocation and/or the C sizeof() operator is used,
8022 and affects the OSL memory allocation interfaces AcpiOsAllocate
8023 and AcpiOsCallocate.
8025 Implemented sticky user breakpoints in the AML debugger.
8027 Code and Data Size: Current core subsystem library sizes are shown
8028 below. These are the code and data sizes for the acpica.lib
8029 produced by the Microsoft Visual C++ 6.0 compiler, and these
8030 values do not include any ACPI driver or OSPM code. The debug
8031 version of the code includes the debug output trace mechanism and
8032 has a larger code and data size. Note that these values will vary
8033 depending on the efficiency of the compiler and the compiler
8034 options used during generation.
8036 Previous Release (12_05_01)
8037 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8038 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8040 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8041 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8043 3) ASL Compiler, version X2034:
8045 Now checks for (and generates an error if detected) the use of a
8046 Break or Continue statement without an enclosing While statement.
8049 Successfully generated the compiler with the Intel 64-bit C
8052 ----------------------------------------
8053 Summary of changes for this label: 12_05_01
8055 1) ACPI CA Core Subsystem:
8057 The ACPI 2.0 CopyObject operator is fully implemented. This
8058 operator creates a new copy of an object (and is also used to
8059 bypass the "implicit conversion" mechanism of the Store operator.)
8061 The ACPI 2.0 semantics for the SizeOf operator are fully
8062 implemented. The change is that performing a SizeOf on a
8063 reference object causes an automatic dereference of the object to
8064 tha actual value before the size is evaluated. This behavior was
8065 undefined in ACPI 1.0.
8067 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
8068 have been implemented. The interrupt polarity and mode are now
8071 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
8072 appearing in Package objects were not properly converted to
8073 integers when the internal Package was converted to an external
8074 object (via the AcpiEvaluateObject interface.)
8076 Fixed a problem with the namespace object deletion mechanism for
8077 objects created by control methods. There were two parts to this
8078 problem: 1) Objects created during the initialization phase method
8079 parse were not being deleted, and 2) The object owner ID mechanism
8080 to track objects was broken.
8082 Fixed a problem where the use of the ASL Scope operator within a
8083 control method would result in an invalid opcode exception.
8085 Fixed a problem introduced in the previous label where the buffer
8086 length required for the _PRT structure was not being returned
8089 Code and Data Size: Current core subsystem library sizes are shown
8090 below. These are the code and data sizes for the acpica.lib
8091 produced by the Microsoft Visual C++ 6.0 compiler, and these
8092 values do not include any ACPI driver or OSPM code. The debug
8093 version of the code includes the debug output trace mechanism and
8094 has a larger code and data size. Note that these values will vary
8095 depending on the efficiency of the compiler and the compiler
8096 options used during generation.
8098 Previous Release (11_20_01)
8099 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8100 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8103 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8104 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8108 Updated all files to apply cleanly against 2.4.16.
8110 Added basic PCI Interrupt Routing Table (PRT) support for IA32
8111 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
8112 version supports both static and dyanmic PRT entries, but dynamic
8113 entries are treated as if they were static (not yet
8114 reconfigurable). Architecture- specific code to use this data is
8115 absent on IA32 but should be available shortly.
8117 Changed the initialization sequence to start the ACPI interpreter
8118 (acpi_init) prior to initialization of the PCI driver (pci_init)
8119 in init/main.c. This ordering is required to support PRT and
8120 facilitate other (future) enhancement. A side effect is that the
8121 ACPI bus driver and certain device drivers can no longer be loaded
8124 Modified the 'make menuconfig' options to allow PCI Interrupt
8125 Routing support to be included without the ACPI Bus and other
8128 3) ASL Compiler, version X2033:
8130 Fixed some issues with the use of the new CopyObject and
8131 DataTableRegion operators. Both are fully functional.
8133 ----------------------------------------
8134 Summary of changes for this label: 11_20_01
8136 20 November 2001. Summary of changes for this release.
8138 1) ACPI CA Core Subsystem:
8140 Updated Index support to match ACPI 2.0 semantics. Storing a
8141 Integer, String, or Buffer to an Index of a Buffer will store only
8142 the least-significant byte of the source to the Indexed buffer
8143 byte. Multiple writes are not performed.
8145 Fixed a problem where the access type used in an AccessAs ASL
8146 operator was not recorded correctly into the field object.
8148 Fixed a problem where ASL Event objects were created in a
8149 signalled state. Events are now created in an unsignalled state.
8151 The internal object cache is now purged after table loading and
8152 initialization to reduce the use of dynamic kernel memory -- on
8153 the assumption that object use is greatest during the parse phase
8154 of the entire table (versus the run-time use of individual control
8157 ACPI 2.0 variable-length packages are now fully operational.
8159 Code and Data Size: Code and Data optimizations have permitted new
8160 feature development with an actual reduction in the library size.
8161 Current core subsystem library sizes are shown below. These are
8162 the code and data sizes for the acpica.lib produced by the
8163 Microsoft Visual C++ 6.0 compiler, and these values do not include
8164 any ACPI driver or OSPM code. The debug version of the code
8165 includes the debug output trace mechanism and has a larger code
8166 and data size. Note that these values will vary depending on the
8167 efficiency of the compiler and the compiler options used during
8170 Previous Release (11_09_01):
8171 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8172 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8175 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8176 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8180 Enhanced the ACPI boot-time initialization code to allow the use
8181 of Local APIC tables for processor enumeration on IA-32, and to
8182 pave the way for a fully MPS-free boot (on SMP systems) in the
8183 near future. This functionality replaces
8184 arch/i386/kernel/acpitables.c, which was introduced in an earlier
8185 2.4.15-preX release. To enable this feature you must add
8186 "acpi_boot=on" to the kernel command line -- see the help entry
8187 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
8190 Restructured the configuration options to allow boot-time table
8191 parsing support without inclusion of the ACPI Interpreter (and
8194 NOTE: This release does not include fixes for the reported events,
8195 power-down, and thermal passive cooling issues (coming soon).
8199 Added additional typechecking for Fields within restricted access
8200 Operation Regions. All fields within EC and CMOS regions must be
8201 declared with ByteAcc. All fields withing SMBus regions must be
8202 declared with the BufferAcc access type.
8204 Fixed a problem where the listing file output of control methods
8205 no longer interleaved the actual AML code with the ASL source
8211 ----------------------------------------
8212 Summary of changes for this label: 11_09_01
8214 1) ACPI CA Core Subsystem:
8216 Implemented ACPI 2.0-defined support for writes to fields with a
8217 Buffer, String, or Integer source operand that is smaller than the
8218 target field. In these cases, the source operand is zero-extended
8219 to fill the target field.
8221 Fixed a problem where a Field starting bit offset (within the
8222 parent operation region) was calculated incorrectly if the
8224 alignment of the field differed from the access width. This
8225 affected CreateWordField, CreateDwordField, CreateQwordField, and
8226 possibly other fields that use the "AccessAny" keyword.
8228 Fixed a problem introduced in the 11_02_01 release where indirect
8229 stores through method arguments did not operate correctly.
8233 Implemented boot-time ACPI table parsing support
8234 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
8235 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
8236 legacy BIOS interfaces (e.g. MPS) for the configuration of system
8237 processors, memory, and interrupts during setup_arch(). Note that
8238 this patch does not include the required architecture-specific
8239 changes required to apply this information -- subsequent patches
8240 will be posted for both IA32 and IA64 to achieve this.
8242 Added low-level sleep support for IA32 platforms, courtesy of Pat
8243 Mochel. This allows IA32 systems to transition to/from various
8244 sleeping states (e.g. S1, S3), although the lack of a centralized
8245 driver model and power-manageable drivers will prevent its
8246 (successful) use on most systems.
8248 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
8249 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
8250 tables" option, etc.
8252 Increased the default timeout for the EC driver from 1ms to 10ms
8253 (1000 cycles of 10us) to try to address AE_TIME errors during EC
8256 ----------------------------------------
8257 Summary of changes for this label: 11_02_01
8259 1) ACPI CA Core Subsystem:
8261 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
8262 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
8265 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
8266 changes to support ACPI 2.0 Qword field access. Read/Write
8267 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
8268 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
8269 the value parameter for the address space handler interface is now
8270 an ACPI_INTEGER. OSL implementations of these interfaces must now
8271 handle the case where the Width parameter is 64.
8273 Index Fields: Fixed a problem where unaligned bit assembly and
8274 disassembly for IndexFields was not supported correctly.
8276 Index and Bank Fields: Nested Index and Bank Fields are now
8277 supported. During field access, a check is performed to ensure
8278 that the value written to an Index or Bank register is not out of
8279 the range of the register. The Index (or Bank) register is
8280 written before each access to the field data. Future support will
8281 include allowing individual IndexFields to be wider than the
8284 Fields: Fixed a problem where the AML interpreter was incorrectly
8285 attempting to write beyond the end of a Field/OpRegion. This was
8286 a boundary case that occurred when a DWORD field was written to a
8287 BYTE access OpRegion, forcing multiple writes and causing the
8288 interpreter to write one datum too many.
8290 Fields: Fixed a problem with Field/OpRegion access where the
8291 starting bit address of a field was incorrectly calculated if the
8292 current access type was wider than a byte (WordAcc, DwordAcc, or
8295 Fields: Fixed a problem where forward references to individual
8296 FieldUnits (individual Field names within a Field definition) were
8297 not resolved during the AML table load.
8299 Fields: Fixed a problem where forward references from a Field
8300 definition to the parent Operation Region definition were not
8301 resolved during the AML table load.
8303 Fields: Duplicate FieldUnit names within a scope are now detected
8304 during AML table load.
8306 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
8307 returned an incorrect name for the root node.
8309 Code and Data Size: Code and Data optimizations have permitted new
8310 feature development with an actual reduction in the library size.
8311 Current core subsystem library sizes are shown below. These are
8312 the code and data sizes for the acpica.lib produced by the
8313 Microsoft Visual C++ 6.0 compiler, and these values do not include
8314 any ACPI driver or OSPM code. The debug version of the code
8315 includes the debug output trace mechanism and has a larger code
8316 and data size. Note that these values will vary depending on the
8317 efficiency of the compiler and the compiler options used during
8320 Previous Release (10_18_01):
8321 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8322 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8325 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8326 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8330 Improved /proc processor output (Pavel Machek) Re-added
8331 MODULE_LICENSE("GPL") to all modules.
8333 3) ASL Compiler version X2030:
8335 Duplicate FieldUnit names within a scope are now detected and
8340 Programmer Reference updated to reflect OSL and address space
8341 handler interface changes described above.
8343 ----------------------------------------
8344 Summary of changes for this label: 10_18_01
8346 ACPI CA Core Subsystem:
8348 Fixed a problem with the internal object reference count mechanism
8349 that occasionally caused premature object deletion. This resolves
8350 all of the outstanding problem reports where an object is deleted
8351 in the middle of an interpreter evaluation. Although this problem
8352 only showed up in rather obscure cases, the solution to the
8353 problem involved an adjustment of all reference counts involving
8354 objects attached to namespace nodes.
8356 Fixed a problem with Field support in the interpreter where
8357 writing to an aligned field whose length is an exact multiple (2
8358 or greater) of the field access granularity would cause an attempt
8359 to write beyond the end of the field.
8361 The top level AML opcode execution functions within the
8362 interpreter have been renamed with a more meaningful and
8363 consistent naming convention. The modules exmonad.c and
8364 exdyadic.c were eliminated. New modules are exoparg1.c,
8365 exoparg2.c, exoparg3.c, and exoparg6.c.
8367 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
8369 Fixed a problem where the AML debugger was causing some internal
8370 objects to not be deleted during subsystem termination.
8372 Fixed a problem with the external AcpiEvaluateObject interface
8373 where the subsystem would fault if the named object to be
8374 evaluated refered to a constant such as Zero, Ones, etc.
8376 Fixed a problem with IndexFields and BankFields where the
8377 subsystem would fault if the index, data, or bank registers were
8378 not defined in the same scope as the field itself.
8380 Added printf format string checking for compilers that support
8381 this feature. Corrected more than 50 instances of issues with
8382 format specifiers within invocations of ACPI_DEBUG_PRINT
8383 throughout the core subsystem code.
8385 The ASL "Revision" operator now returns the ACPI support level
8386 implemented in the core - the value "2" since the ACPI 2.0 support
8387 is more than 50% implemented.
8389 Enhanced the output of the AML debugger "dump namespace" command
8390 to output in a more human-readable form.
8392 Current core subsystem library code sizes are shown below. These
8394 are the code and data sizes for the acpica.lib produced by the
8395 Microsoft Visual C++ 6.0 compiler, and these values do not include
8396 any ACPI driver or OSPM code. The debug version of the code
8397 includes the full debug trace mechanism -- leading to a much
8399 larger code and data size. Note that these values will vary
8400 depending on the efficiency of the compiler and the compiler
8401 options used during generation.
8403 Previous Label (09_20_01):
8404 Non-Debug Version: 65K Code, 5K Data, 70K Total
8405 Debug Version: 138K Code, 58K Data, 196K Total
8409 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8410 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8414 Implemented a "Bad BIOS Blacklist" to track machines that have
8415 known ASL/AML problems.
8417 Enhanced the /proc interface for the thermal zone driver and added
8418 support for _HOT (the critical suspend trip point). The 'info'
8419 file now includes threshold/policy information, and allows setting
8420 of _SCP (cooling preference) and _TZP (polling frequency) values
8421 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
8422 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
8423 preference to the passive/quiet mode (if supported by the ASL).
8425 Implemented a workaround for a gcc bug that resuted in an OOPs
8426 when loading the control method battery driver.
8428 ----------------------------------------
8429 Summary of changes for this label: 09_20_01
8431 ACPI CA Core Subsystem:
8433 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
8434 modified to allow individual GPE levels to be flagged as wake-
8435 enabled (i.e., these GPEs are to remain enabled when the platform
8438 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
8439 support wake-enabled GPEs. This means that upon entering the
8440 sleep state, all GPEs that are not wake-enabled are disabled.
8441 When leaving the sleep state, these GPEs are reenabled.
8443 A local double-precision divide/modulo module has been added to
8444 enhance portability to OS kernels where a 64-bit math library is
8445 not available. The new module is "utmath.c".
8447 Several optimizations have been made to reduce the use of CPU
8448 stack. Originally over 2K, the maximum stack usage is now below
8449 2K at 1860 bytes (1.82k)
8451 Fixed a problem with the AcpiGetFirmwareTable interface where the
8452 root table pointer was not mapped into a logical address properly.
8454 Fixed a problem where a NULL pointer was being dereferenced in the
8455 interpreter code for the ASL Notify operator.
8457 Fixed a problem where the use of the ASL Revision operator
8458 returned an error. This operator now returns the current version
8459 of the ACPI CA core subsystem.
8461 Fixed a problem where objects passed as control method parameters
8462 to AcpiEvaluateObject were always deleted at method termination.
8463 However, these objects may end up being stored into the namespace
8464 by the called method. The object reference count mechanism was
8465 applied to these objects instead of a force delete.
8467 Fixed a problem where static strings or buffers (contained in the
8468 AML code) that are declared as package elements within the ASL
8469 code could cause a fault because the interpreter would attempt to
8470 delete them. These objects are now marked with the "static
8471 object" flag to prevent any attempt to delete them.
8473 Implemented an interpreter optimization to use operands directly
8474 from the state object instead of extracting the operands to local
8475 variables. This reduces stack use and code size, and improves
8478 The module exxface.c was eliminated as it was an unnecessary extra
8481 Current core subsystem library code sizes are shown below. These
8482 are the code and data sizes for the acpica.lib produced by the
8483 Microsoft Visual C++ 6.0 compiler, and these values do not include
8484 any ACPI driver or OSPM code. The debug version of the code
8485 includes the full debug trace mechanism -- leading to a much
8486 larger code and data size. Note that these values will vary
8487 depending on the efficiency of the compiler and the compiler
8488 options used during generation.
8490 Non-Debug Version: 65K Code, 5K Data, 70K Total
8491 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
8492 Total (Previously 195K)
8496 Support for ACPI 2.0 64-bit integers has been added. All ACPI
8497 Integer objects are now 64 bits wide
8499 All Acpi data types and structures are now in lower case. Only
8500 Acpi macros are upper case for differentiation.
8504 Changes to the external interfaces as described above.
8506 ----------------------------------------
8507 Summary of changes for this label: 08_31_01
8509 ACPI CA Core Subsystem:
8511 A bug with interpreter implementation of the ASL Divide operator
8512 was found and fixed. The implicit function return value (not the
8513 explicit store operands) was returning the remainder instead of
8514 the quotient. This was a longstanding bug and it fixes several
8515 known outstanding issues on various platforms.
8517 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
8518 been further optimized for size. There are 700 invocations of the
8519 DEBUG_PRINT macro alone, so each optimization reduces the size of
8520 the debug version of the subsystem significantly.
8522 A stack trace mechanism has been implemented. The maximum stack
8523 usage is about 2K on 32-bit platforms. The debugger command "stat
8524 stack" will display the current maximum stack usage.
8526 All public symbols and global variables within the subsystem are
8527 now prefixed with the string "Acpi". This keeps all of the
8528 symbols grouped together in a kernel map, and avoids conflicts
8529 with other kernel subsystems.
8531 Most of the internal fixed lookup tables have been moved into the
8532 code segment via the const operator.
8534 Several enhancements have been made to the interpreter to both
8535 reduce the code size and improve performance.
8537 Current core subsystem library code sizes are shown below. These
8538 are the code and data sizes for the acpica.lib produced by the
8539 Microsoft Visual C++ 6.0 compiler, and these values do not include
8540 any ACPI driver or OSPM code. The debug version of the code
8541 includes the full debug trace mechanism which contains over 700
8542 invocations of the DEBUG_PRINT macro, 500 function entry macro
8543 invocations, and over 900 function exit macro invocations --
8544 leading to a much larger code and data size. Note that these
8545 values will vary depending on the efficiency of the compiler and
8546 the compiler options used during generation.
8548 Non-Debug Version: 64K Code, 5K Data, 69K Total
8549 Debug Version: 137K Code, 58K Data, 195K Total
8553 Implemented wbinvd() macro, pending a kernel-wide definition.
8555 Fixed /proc/acpi/event to handle poll() and short reads.
8557 ASL Compiler, version X2026:
8559 Fixed a problem introduced in the previous label where the AML
8561 code emitted for package objects produced packages with zero
8564 ----------------------------------------
8565 Summary of changes for this label: 08_16_01
8567 ACPI CA Core Subsystem:
8569 The following ACPI 2.0 ASL operators have been implemented in the
8570 AML interpreter (These are already supported by the Intel ASL
8571 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
8572 ToBuffer. Support for 64-bit AML constants is implemented in the
8573 AML parser, debugger, and disassembler.
8575 The internal memory tracking mechanism (leak detection code) has
8576 been upgraded to reduce the memory overhead (a separate tracking
8577 block is no longer allocated for each memory allocation), and now
8578 supports all of the internal object caches.
8580 The data structures and code for the internal object caches have
8581 been coelesced and optimized so that there is a single cache and
8582 memory list data structure and a single group of functions that
8583 implement generic cache management. This has reduced the code
8584 size in both the debug and release versions of the subsystem.
8586 The DEBUG_PRINT macro(s) have been optimized for size and replaced
8587 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
8588 different, because it generates a single call to an internal
8589 function. This results in a savings of about 90 bytes per
8590 invocation, resulting in an overall code and data savings of about
8591 16% in the debug version of the subsystem.
8595 Fixed C3 disk corruption problems and re-enabled C3 on supporting
8598 Integrated low-level sleep code by Patrick Mochel.
8600 Further tweaked source code Linuxization.
8606 Support for ACPI 2.0 variable length packages is fixed/completed.
8608 Fixed a problem where the optional length parameter for the ACPI
8609 2.0 ToString operator.
8611 Fixed multiple extraneous error messages when a syntax error is
8612 detected within the declaration line of a control method.
8614 ----------------------------------------
8615 Summary of changes for this label: 07_17_01
8617 ACPI CA Core Subsystem:
8619 Added a new interface named AcpiGetFirmwareTable to obtain any
8620 ACPI table via the ACPI signature. The interface can be called at
8621 any time during kernel initialization, even before the kernel
8622 virtual memory manager is initialized and paging is enabled. This
8623 allows kernel subsystems to obtain ACPI tables very early, even
8624 before the ACPI CA subsystem is initialized.
8626 Fixed a problem where Fields defined with the AnyAcc attribute
8627 could be resolved to the incorrect address under the following
8628 conditions: 1) the field width is larger than 8 bits and 2) the
8629 parent operation region is not defined on a DWORD boundary.
8631 Fixed a problem where the interpreter is not being locked during
8632 namespace initialization (during execution of the _INI control
8633 methods), causing an error when an attempt is made to release it
8636 ACPI 2.0 support in the AML Interpreter has begun and will be
8637 ongoing throughout the rest of this year. In this label, The Mod
8638 operator is implemented.
8640 Added a new data type to contain full PCI addresses named
8641 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
8642 and Function values.
8646 Enhanced the Linux version of the source code to change most
8647 capitalized ACPI type names to lowercase. For example, all
8648 instances of ACPI_STATUS are changed to acpi_status. This will
8649 result in a large diff, but the change is strictly cosmetic and
8650 aligns the CA code closer to the Linux coding standard.
8654 The interfaces to the PCI configuration space have been changed to
8655 add the PCI Segment number and to split the single 32-bit combined
8656 DeviceFunction field into two 16-bit fields. This was
8657 accomplished by moving the four values that define an address in
8658 PCI configuration space (segment, bus, device, and function) to
8659 the new ACPI_PCI_ID structure.
8661 The changes to the PCI configuration space interfaces led to a
8662 reexamination of the complete set of address space access
8663 interfaces for PCI, I/O, and Memory. The previously existing 18
8664 interfaces have proven difficult to maintain (any small change
8665 must be propagated across at least 6 interfaces) and do not easily
8666 allow for future expansion to 64 bits if necessary. Also, on some
8667 systems, it would not be appropriate to demultiplex the access
8668 width (8, 16, 32,or 64) before calling the OSL if the
8669 corresponding native OS interfaces contain a similar access width
8670 parameter. For these reasons, the 18 address space interfaces
8671 have been replaced by these 6 new ones:
8673 AcpiOsReadPciConfiguration
8674 AcpiOsWritePciConfiguration
8680 Added a new interface named AcpiOsGetRootPointer to allow the OSL
8681 to perform the platform and/or OS-specific actions necessary to
8682 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
8683 interface will simply call down to the CA core to perform the low-
8684 memory search for the table. On IA-64, the RSDP is obtained from
8685 EFI. Migrating this interface to the OSL allows the CA core to
8687 remain OS and platform independent.
8689 Added a new interface named AcpiOsSignal to provide a generic
8690 "function code and pointer" interface for various miscellaneous
8691 signals and notifications that must be made to the host OS. The
8692 first such signals are intended to support the ASL Fatal and
8693 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
8694 interface has been obsoleted.
8696 The definition of the AcpiFormatException interface has been
8697 changed to simplify its use. The caller no longer must supply a
8698 buffer to the call; A pointer to a const string is now returned
8699 directly. This allows the call to be easily used in printf
8700 statements, etc. since the caller does not have to manage a local
8704 ASL Compiler, Version X2025:
8706 The ACPI 2.0 Switch/Case/Default operators have been implemented
8707 and are fully functional. They will work with all ACPI 1.0
8708 interpreters, since the operators are simply translated to If/Else
8711 The ACPI 2.0 ElseIf operator is implemented and will also work
8712 with 1.0 interpreters, for the same reason.
8714 Implemented support for ACPI 2.0 variable-length packages. These
8715 packages have a separate opcode, and their size is determined by
8716 the interpreter at run-time.
8718 Documentation The ACPI CA Programmer Reference has been updated to
8719 reflect the new interfaces and changes to existing interfaces.
8721 ------------------------------------------
8722 Summary of changes for this label: 06_15_01
8724 ACPI CA Core Subsystem:
8726 Fixed a problem where a DWORD-accessed field within a Buffer
8727 object would get its byte address inadvertently rounded down to
8728 the nearest DWORD. Buffers are always Byte-accessible.
8730 ASL Compiler, version X2024:
8732 Fixed a problem where the Switch() operator would either fault or
8733 hang the compiler. Note however, that the AML code for this ACPI
8734 2.0 operator is not yet implemented.
8736 Compiler uses the new AcpiOsGetTimer interface to obtain compile
8739 Implementation of the CreateField operator automatically converts
8740 a reference to a named field within a resource descriptor from a
8741 byte offset to a bit offset if required.
8743 Added some missing named fields from the resource descriptor
8744 support. These are the names that are automatically created by the
8745 compiler to reference fields within a descriptor. They are only
8746 valid at compile time and are not passed through to the AML
8749 Resource descriptor named fields are now typed as Integers and
8750 subject to compile-time typechecking when used in expressions.
8752 ------------------------------------------
8753 Summary of changes for this label: 05_18_01
8755 ACPI CA Core Subsystem:
8757 Fixed a couple of problems in the Field support code where bits
8758 from adjacent fields could be returned along with the proper field
8759 bits. Restructured the field support code to improve performance,
8760 readability and maintainability.
8762 New DEBUG_PRINTP macro automatically inserts the procedure name
8763 into the output, saving hundreds of copies of procedure name
8764 strings within the source, shrinking the memory footprint of the
8765 debug version of the core subsystem.
8767 Source Code Structure:
8769 The source code directory tree was restructured to reflect the
8770 current organization of the component architecture. Some files
8771 and directories have been moved and/or renamed.
8775 Fixed leaking kacpidpc processes.
8777 Fixed queueing event data even when /proc/acpi/event is not
8780 ASL Compiler, version X2020:
8782 Memory allocation performance enhancement - over 24X compile time
8783 improvement on large ASL files. Parse nodes and namestring
8784 buffers are now allocated from a large internal compiler buffer.
8786 The temporary .SRC file is deleted unless the "-s" option is
8789 The "-d" debug output option now sends all output to the .DBG file
8790 instead of the console.
8792 "External" second parameter is now optional
8794 "ElseIf" syntax now properly allows the predicate
8796 Last operand to "Load" now recognized as a Target operand
8798 Debug object can now be used anywhere as a normal object.
8800 ResourceTemplate now returns an object of type BUFFER
8802 EISAID now returns an object of type INTEGER
8804 "Index" now works with a STRING operand
8806 "LoadTable" now accepts optional parameters
8808 "ToString" length parameter is now optional
8810 "Interrupt (ResourceType," parse error fixed.
8812 "Register" with a user-defined region space parse error fixed
8814 Escaped backslash at the end of a string ("\\") scan/parse error
8817 "Revision" is now an object of type INTEGER.
8821 ------------------------------------------
8822 Summary of changes for this label: 05_02_01
8826 /proc/acpi/event now blocks properly.
8828 Removed /proc/sys/acpi. You can still dump your DSDT from
8831 ACPI CA Core Subsystem:
8833 Fixed a problem introduced in the previous label where some of the
8834 "small" resource descriptor types were not recognized.
8836 Improved error messages for the case where an ASL Field is outside
8837 the range of the parent operation region.
8839 ASL Compiler, version X2018:
8842 Added error detection for ASL Fields that extend beyond the length
8843 of the parent operation region (only if the length of the region
8844 is known at compile time.) This includes fields that have a
8845 minimum access width that is smaller than the parent region, and
8846 individual field units that are partially or entirely beyond the
8847 extent of the parent.
8851 ------------------------------------------
8852 Summary of changes for this label: 04_27_01
8854 ACPI CA Core Subsystem:
8856 Fixed a problem where the namespace mutex could be released at the
8857 wrong time during execution of AcpiRemoveAddressSpaceHandler.
8859 Added optional thread ID output for debug traces, to simplify
8860 debugging of multiple threads. Added context switch notification
8861 when the debug code realizes that a different thread is now
8862 executing ACPI code.
8864 Some additional external data types have been prefixed with the
8865 string "ACPI_" for consistency. This may effect existing code.
8866 The data types affected are the external callback typedefs - e.g.,
8868 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
8872 Fixed an issue with the OSL semaphore implementation where a
8873 thread was waking up with an error from receiving a SIGCHLD
8876 Linux version of ACPI CA now uses the system C library for string
8877 manipulation routines instead of a local implementation.
8879 Cleaned up comments and removed TBDs.
8881 ASL Compiler, version X2017:
8883 Enhanced error detection and reporting for all file I/O
8888 Programmer Reference updated to version 1.06.
8892 ------------------------------------------
8893 Summary of changes for this label: 04_13_01
8895 ACPI CA Core Subsystem:
8897 Restructured support for BufferFields and RegionFields.
8898 BankFields support is now fully operational. All known 32-bit
8899 limitations on field sizes have been removed. Both BufferFields
8900 and (Operation) RegionFields are now supported by the same field
8903 Resource support now supports QWORD address and IO resources. The
8904 16/32/64 bit address structures and the Extended IRQ structure
8905 have been changed to properly handle Source Resource strings.
8907 A ThreadId of -1 is now used to indicate a "mutex not acquired"
8908 condition internally and must never be returned by AcpiOsThreadId.
8909 This reserved value was changed from 0 since Unix systems allow a
8914 Driver code reorganized to enhance portability
8916 Added a kernel configuration option to control ACPI_DEBUG
8918 Fixed the EC driver to honor _GLK.
8920 ASL Compiler, version X2016:
8922 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
8923 address space was set to 0, not 0x7f as it should be.
8925 ------------------------------------------
8926 Summary of changes for this label: 03_13_01
8928 ACPI CA Core Subsystem:
8930 During ACPI initialization, the _SB_._INI method is now run if
8933 Notify handler fix - notifies are deferred until the parent method
8934 completes execution. This fixes the "mutex already acquired"
8935 issue seen occasionally.
8937 Part of the "implicit conversion" rules in ACPI 2.0 have been
8938 found to cause compatibility problems with existing ASL/AML. The
8939 convert "result-to-target-type" implementation has been removed
8940 for stores to method Args and Locals. Source operand conversion
8941 is still fully implemented. Possible changes to ACPI 2.0
8942 specification pending.
8944 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
8947 Fix for compiler warnings for 64-bit compiles.
8951 /proc output aligned for easier parsing.
8953 Release-version compile problem fixed.
8955 New kernel configuration options documented in Configure.help.
8957 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
8962 Power resource driver integrated with bus manager.
8964 Fixed kernel fault during active cooling for thermal zones.
8968 The source code tree has been restructured.
8972 ------------------------------------------
8973 Summary of changes for this label: 03_02_01
8975 Linux OS Services Layer (OSL):
8977 Major revision of all Linux-specific code.
8979 Modularized all ACPI-specific drivers.
8981 Added new thermal zone and power resource drivers.
8983 Revamped /proc interface (new functionality is under /proc/acpi).
8985 New kernel configuration options.
8989 New kernel configuration options not documented in Configure.help
8993 Module dependencies not currently implemented. If used, they
8994 should be loaded in this order: busmgr, power, ec, system,
8995 processor, battery, ac_adapter, button, thermal.
8997 Modules will not load if CONFIG_MODVERSION is set.
8999 IBM 600E - entering S5 may reboot instead of shutting down.
9001 IBM 600E - Sleep button may generate "Invalid <NULL> context"
9004 Some systems may fail with "execution mutex already acquired"
9007 ACPI CA Core Subsystem:
9009 Added a new OSL Interface, AcpiOsGetThreadId. This was required
9010 for the deadlock detection code. Defined to return a non-zero, 32-
9011 bit thread ID for the currently executing thread. May be a non-
9012 zero constant integer on single-thread systems.
9014 Implemented deadlock detection for internal subsystem mutexes. We
9015 may add conditional compilation for this code (debug only) later.
9017 ASL/AML Mutex object semantics are now fully supported. This
9018 includes multiple acquires/releases by owner and support for the
9020 Mutex SyncLevel parameter.
9022 A new "Force Release" mechanism automatically frees all ASL
9023 Mutexes that have been acquired but not released when a thread
9024 exits the interpreter. This forces conformance to the ACPI spec
9025 ("All mutexes must be released when an invocation exits") and
9026 prevents deadlocked ASL threads. This mechanism can be expanded
9027 (later) to monitor other resource acquisitions if OEM ASL code
9028 continues to misbehave (which it will).
9030 Several new ACPI exception codes have been added for the Mutex
9033 Recursive method calls are now allowed and supported (the ACPI
9034 spec does in fact allow recursive method calls.) The number of
9035 recursive calls is subject to the restrictions imposed by the
9036 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
9039 Implemented support for the SyncLevel parameter for control
9040 methods (ACPI 2.0 feature)
9042 Fixed a deadlock problem when multiple threads attempted to use
9045 Fixed a problem where the string length of a String package
9046 element was not always set in a package returned from
9049 Fixed a problem where the length of a String package element was
9050 not always included in the length of the overall package returned
9051 from AcpiEvaluateObject.
9053 Added external interfaces (Acpi*) to the ACPI debug memory
9054 manager. This manager keeps a list of all outstanding
9055 allocations, and can therefore detect memory leaks and attempts to
9056 free memory blocks more than once. Useful for code such as the
9057 power manager, etc. May not be appropriate for device drivers.
9058 Performance with the debug code enabled is slow.
9060 The ACPI Global Lock is now an optional hardware element.
9062 ASL Compiler Version X2015:
9064 Integrated changes to allow the compiler to be generated on
9067 Linux makefile added to generate the compiler on Linux
9071 All platform-specific headers have been moved to their own
9072 subdirectory, Include/Platform.
9074 New source file added, Interpreter/ammutex.c
9076 New header file, Include/acstruct.h
9080 The programmer reference has been updated for the following new
9081 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
9083 ------------------------------------------
9084 Summary of changes for this label: 02_08_01
9086 Core ACPI CA Subsystem: Fixed a problem where an error was
9087 incorrectly returned if the return resource buffer was larger than
9088 the actual data (in the resource interfaces).
9090 References to named objects within packages are resolved to the
9092 full pathname string before packages are returned directly (via
9093 the AcpiEvaluateObject interface) or indirectly via the resource
9096 Linux OS Services Layer (OSL):
9098 Improved /proc battery interface.
9101 Added C-state debugging output and other miscellaneous fixes.
9103 ASL Compiler Version X2014:
9105 All defined method arguments can now be used as local variables,
9106 including the ones that are not actually passed in as parameters.
9107 The compiler tracks initialization of the arguments and issues an
9108 exception if they are used without prior assignment (just like
9111 The -o option now specifies a filename prefix that is used for all
9112 output files, including the AML output file. Otherwise, the
9113 default behavior is as follows: 1) the AML goes to the file
9114 specified in the DSDT. 2) all other output files use the input
9115 source filename as the base.
9117 ------------------------------------------
9118 Summary of changes for this label: 01_25_01
9120 Core ACPI CA Subsystem: Restructured the implementation of object
9121 store support within the interpreter. This includes support for
9122 the Store operator as well as any ASL operators that include a
9125 Partially implemented support for Implicit Result-to-Target
9126 conversion. This is when a result object is converted on the fly
9127 to the type of an existing target object. Completion of this
9128 support is pending further analysis of the ACPI specification
9129 concerning this matter.
9131 CPU-specific code has been removed from the subsystem (hardware
9134 New Power Management Timer functions added
9136 Linux OS Services Layer (OSL): Moved system state transition code
9137 to the core, fixed it, and modified Linux OSL accordingly.
9139 Fixed C2 and C3 latency calculations.
9142 We no longer use the compilation date for the version message on
9143 initialization, but retrieve the version from AcpiGetSystemInfo().
9145 Incorporated for fix Sony VAIO machines.
9147 Documentation: The Programmer Reference has been updated and
9151 ASL Compiler: Version X2013: Fixed a problem where the line
9152 numbering and error reporting could get out of sync in the
9153 presence of multiple include files.
9155 ------------------------------------------
9156 Summary of changes for this label: 01_15_01
9158 Core ACPI CA Subsystem:
9160 Implemented support for type conversions in the execution of the
9161 ASL Concatenate operator (The second operand is converted to
9162 match the type of the first operand before concatenation.)
9164 Support for implicit source operand conversion is partially
9165 implemented. The ASL source operand types Integer, Buffer, and
9166 String are freely interchangeable for most ASL operators and are
9167 converted by the interpreter on the fly as required. Implicit
9168 Target operand conversion (where the result is converted to the
9169 target type before storing) is not yet implemented.
9171 Support for 32-bit and 64-bit BCD integers is implemented.
9173 Problem fixed where a field read on an aligned field could cause a
9174 read past the end of the field.
9176 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
9177 does not return a value, but the caller expects one. (The ASL
9178 compiler flags this as a warning.)
9183 1. Static typechecking of all operands is implemented. This
9184 prevents the use of invalid objects (such as using a Package where
9185 an Integer is required) at compile time instead of at interpreter
9187 2. The ASL source line is printed with ALL errors and warnings.
9188 3. Bug fix for source EOF without final linefeed.
9189 4. Debug option is split into a parse trace and a namespace trace.
9190 5. Namespace output option (-n) includes initial values for
9191 integers and strings.
9192 6. Parse-only option added for quick syntax checking.
9193 7. Compiler checks for duplicate ACPI name declarations
9196 1. Relaxed typechecking to allow interchangeability between
9197 strings, integers, and buffers. These types are now converted by
9198 the interpreter at runtime.
9199 2. Compiler reports time taken by each internal subsystem in the
9203 ------------------------------------------
9204 Summary of changes for this label: 12_14_00
9208 This is the first official release of the compiler. Since the
9209 compiler requires elements of the Core Subsystem, this label
9210 synchronizes everything.
9212 ------------------------------------------
9213 Summary of changes for this label: 12_08_00
9216 Fixed a problem where named references within the ASL definition
9217 of both OperationRegions and CreateXXXFields did not work
9218 properly. The symptom was an AE_AML_OPERAND_TYPE during
9219 initialization of the region/field. This is similar (but not
9220 related internally) to the problem that was fixed in the last
9223 Implemented both 32-bit and 64-bit support for the BCD ASL
9224 functions ToBCD and FromBCD.
9226 Updated all legal headers to include "2000" in the copyright
9229 ------------------------------------------
9230 Summary of changes for this label: 12_01_00
9232 Fixed a problem where method invocations within the ASL definition
9233 of both OperationRegions and CreateXXXFields did not work
9234 properly. The symptom was an AE_AML_OPERAND_TYPE during
9235 initialization of the region/field:
9237 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
9238 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
9241 Fixed a problem where operators with more than one nested
9242 subexpression would fail. The symptoms were varied, by mostly
9243 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
9244 problem that has gone unnoticed until now.
9246 Subtract (Add (1,2), Multiply (3,4))
9248 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
9249 previous build (The prefix part of a relative path was handled
9252 Fixed a problem where Operation Region initialization failed if
9253 the operation region name was a "namepath" instead of a simple
9254 "nameseg". Symptom was an AE_NO_OPERAND error.
9256 Fixed a problem where an assignment to a local variable via the
9257 indirect RefOf mechanism only worked for the first such
9258 assignment. Subsequent assignments were ignored.
9260 ------------------------------------------
9261 Summary of changes for this label: 11_15_00
9263 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
9264 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
9265 the AML interpreter does NOT have support for the new 2.0 ASL
9266 grammar terms at this time.
9268 All ACPI hardware access is via the GAS structures in the ACPI 2.0
9271 All physical memory addresses across all platforms are now 64 bits
9272 wide. Logical address width remains dependent on the platform
9275 AcpiOsMapMemory interface changed to a 64-bit physical address.
9277 The AML interpreter integer size is now 64 bits, as per the ACPI
9280 For backwards compatibility with ACPI 1.0, ACPI tables with a
9281 revision number less than 2 use 32-bit integers only.
9283 Fixed a problem where the evaluation of OpRegion operands did not
9284 always resolve them to numbers properly.
9286 ------------------------------------------
9287 Summary of changes for this label: 10_20_00
9289 Fix for CBN_._STA issue. This fix will allow correct access to
9290 CBN_ OpRegions when the _STA returns 0x8.
9292 Support to convert ACPI constants (Ones, Zeros, One) to actual
9293 values before a package object is returned
9295 Fix for method call as predicate to if/while construct causing
9296 incorrect if/while behavior
9298 Fix for Else block package lengths sometimes calculated wrong (if
9301 Fix for Processor object length field, was always zero
9303 Table load abort if FACP sanity check fails
9305 Fix for problem with Scope(name) if name already exists
9307 Warning emitted if a named object referenced cannot be found
9308 (resolved) during method execution.
9314 ------------------------------------------
9315 Summary of changes for this label: 9_29_00
9317 New table initialization interfaces: AcpiInitializeSubsystem no
9318 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
9319 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
9320 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
9323 Note: These interface changes require changes to all existing OSDs
9325 The PCI_Config default address space handler is always installed
9326 at the root namespace object.
9328 -------------------------------------------
9329 Summary of changes for this label: 09_15_00
9331 The new initialization architecture is implemented. New
9332 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
9333 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
9335 (Namespace is automatically loaded when a table is loaded)
9337 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
9338 52 bytes to 32 bytes. There is usually one of these for every
9339 namespace object, so the memory savings is significant.
9341 Implemented just-in-time evaluation of the CreateField operators.
9343 Bug fixes for IA-64 support have been integrated.
9345 Additional code review comments have been implemented
9347 The so-called "third pass parse" has been replaced by a final walk
9348 through the namespace to initialize all operation regions (address
9349 spaces) and fields that have not yet been initialized during the
9350 execution of the various _INI and REG methods.
9352 New file - namespace/nsinit.c
9354 -------------------------------------------
9355 Summary of changes for this label: 09_01_00
9357 Namespace manager data structures have been reworked to change the
9358 primary object from a table to a single object. This has
9359 resulted in dynamic memory savings of 3X within the namespace and
9360 2X overall in the ACPI CA subsystem.
9362 Fixed problem where the call to AcpiEvFindPciRootBuses was
9363 inadvertently left commented out.
9365 Reduced the warning count when generating the source with the GCC
9368 Revision numbers added to each module header showing the
9369 SourceSafe version of the file. Please refer to this version
9370 number when giving us feedback or comments on individual modules.
9372 The main object types within the subsystem have been renamed to
9373 clarify their purpose:
9375 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
9376 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
9377 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
9379 NOTE: no changes to the initialization sequence are included in
9382 -------------------------------------------
9383 Summary of changes for this label: 08_23_00
9385 Fixed problem where TerminateControlMethod was being called
9386 multiple times per method
9388 Fixed debugger problem where single stepping caused a semaphore to
9391 Improved performance through additional parse object caching -
9392 added ACPI_EXTENDED_OP type
9394 -------------------------------------------
9395 Summary of changes for this label: 08_10_00
9397 Parser/Interpreter integration: Eliminated the creation of
9398 complete parse trees for ACPI tables and control methods.
9399 Instead, parse subtrees are created and then deleted as soon as
9400 they are processed (Either entered into the namespace or executed
9401 by the interpreter). This reduces the use of dynamic kernel
9402 memory significantly. (about 10X)
9404 Exception codes broken into classes and renumbered. Be sure to
9405 recompile all code that includes acexcep.h. Hopefully we won't
9406 have to renumber the codes again now that they are split into
9407 classes (environment, programmer, AML code, ACPI table, and
9410 Fixed some additional alignment issues in the Resource Manager
9413 Implemented semaphore tracking in the AcpiExec utility, and fixed
9414 several places where mutexes/semaphores were being unlocked
9415 without a corresponding lock operation. There are no known
9416 semaphore or mutex "leaks" at this time.
9418 Fixed the case where an ASL Return operator is used to return an
9421 -------------------------------------------
9422 Summary of changes for this label: 07_28_00
9424 Fixed a problem with the way addresses were calculated in
9425 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
9426 manifested itself when a Field was created with WordAccess or
9427 DwordAccess, but the field unit defined within the Field was less
9429 than a Word or Dword.
9431 Fixed a problem in AmlDumpOperands() module's loop to pull
9432 operands off of the operand stack to display information. The
9433 problem manifested itself as a TLB error on 64-bit systems when
9434 accessing an operand stack with two or more operands.
9436 Fixed a problem with the PCI configuration space handlers where
9437 context was getting confused between accesses. This required a
9438 change to the generic address space handler and address space
9439 setup definitions. Handlers now get both a global handler context
9440 (this is the one passed in by the user when executing
9441 AcpiInstallAddressSpaceHandler() and a specific region context
9442 that is unique to each region (For example, the _ADR, _SEG and
9443 _BBN values associated with a specific region). The generic
9444 function definitions have changed to the following:
9446 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
9447 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
9448 *HandlerContext, // This used to be void *Context void
9449 *RegionContext); // This is an additional parameter
9451 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
9452 RegionHandle, UINT32 Function, void *HandlerContext, void
9453 **RegionContext); // This used to be **ReturnContext
9455 -------------------------------------------
9456 Summary of changes for this label: 07_21_00
9458 Major file consolidation and rename. All files within the
9459 interpreter have been renamed as well as most header files. This
9460 was done to prevent collisions with existing files in the host
9461 OSs -- filenames such as "config.h" and "global.h" seem to be
9462 quite common. The VC project files have been updated. All
9463 makefiles will require modification.
9465 The parser/interpreter integration continues in Phase 5 with the
9466 implementation of a complete 2-pass parse (the AML is parsed
9467 twice) for each table; This avoids the construction of a huge
9468 parse tree and therefore reduces the amount of dynamic memory
9469 required by the subsystem. Greater use of the parse object cache
9470 means that performance is unaffected.
9472 Many comments from the two code reviews have been rolled in.
9474 The 64-bit alignment support is complete.
9476 -------------------------------------------
9477 Summary of changes for this label: 06_30_00
9479 With a nod and a tip of the hat to the technology of yesteryear,
9480 we've added support in the source code for 80 column output
9481 devices. The code is now mostly constrained to 80 columns or
9482 less to support environments and editors that 1) cannot display
9483 or print more than 80 characters on a single line, and 2) cannot
9484 disable line wrapping.
9486 A major restructuring of the namespace data structure has been
9487 completed. The result is 1) cleaner and more
9488 understandable/maintainable code, and 2) a significant reduction
9489 in the dynamic memory requirement for each named ACPI object
9492 -------------------------------------------
9493 Summary of changes for this label: 06_23_00
9495 Linux support has been added. In order to obtain approval to get
9496 the ACPI CA subsystem into the Linux kernel, we've had to make
9497 quite a few changes to the base subsystem that will affect all
9498 users (all the changes are generic and OS- independent). The
9499 effects of these global changes have been somewhat far reaching.
9500 Files have been merged and/or renamed and interfaces have been
9501 renamed. The major changes are described below.
9503 Osd* interfaces renamed to AcpiOs* to eliminate namespace
9504 pollution/confusion within our target kernels. All OSD
9505 interfaces must be modified to match the new naming convention.
9507 Files merged across the subsystem. A number of the smaller source
9508 and header files have been merged to reduce the file count and
9509 increase the density of the existing files. There are too many
9510 to list here. In general, makefiles that call out individual
9511 files will require rebuilding.
9513 Interpreter files renamed. All interpreter files now have the
9514 prefix am* instead of ie* and is*.
9516 Header files renamed: The acapi.h file is now acpixf.h. The
9517 acpiosd.h file is now acpiosxf.h. We are removing references to
9518 the acronym "API" since it is somewhat windowsy. The new name is
9519 "external interface" or xface or xf in the filenames.j
9522 All manifest constants have been forced to upper case (some were
9523 mixed case.) Also, the string "ACPI_" has been prepended to many
9524 (not all) of the constants, typedefs, and structs.
9526 The globals "DebugLevel" and "DebugLayer" have been renamed
9527 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
9529 All other globals within the subsystem are now prefixed with
9530 "AcpiGbl_" Internal procedures within the subsystem are now
9531 prefixed with "Acpi" (with only a few exceptions). The original
9532 two-letter abbreviation for the subcomponent remains after "Acpi"
9533 - for example, CmCallocate became AcpiCmCallocate.
9535 Added a source code translation/conversion utility. Used to
9536 generate the Linux source code, it can be modified to generate
9537 other types of source as well. Can also be used to cleanup
9538 existing source by removing extraneous spaces and blank lines.
9539 Found in tools/acpisrc/*
9541 OsdUnMapMemory was renamed to OsdUnmapMemory and then
9542 AcpiOsUnmapMemory. (UnMap became Unmap).
9544 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
9545 When set to one, this indicates that the caller wants to use the
9547 semaphore as a mutex, not a counting semaphore. ACPI CA uses
9548 both types. However, implementers of this call may want to use
9549 different OS primitives depending on the type of semaphore
9550 requested. For example, some operating systems provide separate
9552 "mutex" and "semaphore" interfaces - where the mutex interface is
9553 much faster because it doesn't have all the overhead of a full
9554 semaphore implementation.
9556 Fixed a deadlock problem where a method that accesses the PCI
9557 address space can block forever if it is the first access to the
9560 -------------------------------------------
9561 Summary of changes for this label: 06_02_00
9563 Support for environments that cannot handle unaligned data
9564 accesses (e.g. firmware and OS environments devoid of alignment
9565 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
9566 been added (via configurable macros) in these three areas: -
9567 Transfer of data from the raw AML byte stream is done via byte
9568 moves instead of word/dword/qword moves. - External objects are
9569 aligned within the user buffer, including package elements (sub-
9570 objects). - Conversion of name strings to UINT32 Acpi Names is now
9573 The Store operator was modified to mimic Microsoft's
9574 implementation when storing to a Buffer Field.
9576 Added a check of the BM_STS bit before entering C3.
9578 The methods subdirectory has been obsoleted and removed. A new
9579 file, cmeval.c subsumes the functionality.
9581 A 16-bit (DOS) version of AcpiExec has been developed. The
9582 makefile is under the acpiexec directory.