1 ----------------------------------------
2 13 October 2009. Summary of changes for version 20091013:
4 This release is available at www.acpica.org/downloads
6 1) ACPI CA Core Subsystem:
8 Fixed a problem where an Operation Region _REG method could be executed more
9 than once. If a custom address space handler is installed by the host before
10 the "initialize operation regions" phase of the ACPICA initialization, any
11 _REG methods for that address space could be executed twice. This change
12 fixes the problem. ACPICA BZ 427. Lin Ming.
14 Fixed a possible memory leak for the Scope() ASL operator. When the exact
15 invocation of "Scope(\)" is executed (change scope to root), one internal
16 operand object was leaked. Lin Ming.
18 Implemented a run-time repair for the _MAT predefined method. If the _MAT
19 return value is defined as a Field object in the AML, and the field
20 size is less than or equal to the default width of an integer (32 or 64),_MAT
21 can incorrectly return an Integer instead of a Buffer. ACPICA now
22 automatically repairs this problem. ACPICA BZ 810.
24 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
25 "OEM Information" field is often incorrectly returned as an Integer with
26 value zero if the field is not supported by the platform. This is due to an
27 ambiguity in the ACPI specification. The field should always be a string.
28 ACPICA now automatically repairs this problem by returning a NULL string
29 within the returned Package. ACPICA BZ 807.
31 Example Code and Data Size: These are the sizes for the OS-independent
32 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
33 debug version of the code includes the debug output trace mechanism and has a
34 much larger code and data size.
37 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
38 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
40 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
41 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
43 2) iASL Compiler/Disassembler and Tools:
45 Disassembler: Fixed a problem where references to external symbols that
46 contained one or more parent-prefixes (carats) were not handled correctly,
47 possibly causing a fault. ACPICA BZ 806. Lin Ming.
49 Disassembler: Restructured the code so that all functions that handle
50 external symbols are in a single module. One new file is added,
53 AML Debugger: Added a max count argument for the Batch command (which
54 executes multiple predefined methods within the namespace.)
56 iASL: Updated the compiler documentation (User Reference.) Available at
57 http://www.acpica.org/documentation/. ACPICA BZ 750.
59 AcpiXtract: Updated for Lint and other formatting changes. Close all open
62 ----------------------------------------
63 03 September 2009. Summary of changes for version 20090903:
65 1) ACPI CA Core Subsystem:
67 For Windows Vista compatibility, added the automatic execution of an _INI
68 method located at the namespace root (\_INI). This method is executed at
69 table load time. This support is in addition to the automatic execution of
72 Fixed a possible memory leak in the interpreter for AML package objects if
73 the package initializer list is longer than the defined size of the package.
74 This apparently can only happen if the BIOS changes the package size on the
75 fly (seen in a _PSS object), as ASL compilers do not allow this. The
76 interpreter will truncate the package to the defined size (and issue an error
77 message), but previously could leave the extra objects undeleted if they were
78 pre-created during the argument processing (such is the case if the package
79 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
81 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
82 This has been reported in the field. Previously, ACPICA would zero out the
83 buffer/string. Now, the operation is treated as a noop. Provides Windows
84 compatibility. ACPICA BZ 803. Lin Ming.
86 Removed an extraneous error message for ASL constructs of the form
87 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
88 are seen in many BIOSs and are once again treated as NOOPs and no error is
89 emitted when they are encountered. ACPICA BZ 785.
91 Fixed an extraneous warning message if a _DSM reserved method returns a
92 Package object. _DSM can return any type of object, so validation on the
93 return type cannot be performed. ACPICA BZ 802.
95 Example Code and Data Size: These are the sizes for the OS-independent
96 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
97 debug version of the code includes the debug output trace mechanism and has a
98 much larger code and data size.
101 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
102 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
104 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
105 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
107 2) iASL Compiler/Disassembler and Tools:
109 iASL: Fixed a problem with the use of the Alias operator and Resource
110 Templates. The correct alias is now constructed and no error is emitted.
113 iASL: Implemented the -I option to specify additional search directories for
114 include files. Allows multiple additional search paths for include files.
115 Directories are searched in the order specified on the command line (after
116 the local directory is searched.) ACPICA BZ 800.
118 iASL: Fixed a problem where the full pathname for include files was not
119 emitted for warnings/errors. This caused the IDE support to not work
120 properly. ACPICA BZ 765.
122 iASL: Implemented the -@ option to specify a Windows-style response file
123 containing additional command line options. ACPICA BZ 801.
125 AcpiExec: Added support to load multiple AML files simultaneously (such as a
126 DSDT and multiple SSDTs). Also added support for wildcards within the AML
127 pathname. These features allow all machine tables to be easily loaded and
128 debugged together. ACPICA BZ 804.
130 Disassembler: Added missing support for disassembly of HEST table Error Bank
133 ----------------------------------------
134 30 July 2009. Summary of changes for version 20090730:
136 The ACPI 4.0 implementation for ACPICA is complete with this release.
138 1) ACPI CA Core Subsystem:
140 ACPI 4.0: Added header file support for all new and changed ACPI tables.
141 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
142 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
143 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
144 have been some ACPI 4.0 changes to other existing tables. Split the large
145 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
147 ACPI 4.0: Implemented predefined name validation for all new names. There are
148 31 new names in ACPI 4.0. The predefined validation module was split into two
149 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
151 Implemented support for so-called "module-level executable code". This is
152 executable AML code that exists outside of any control method and is intended
153 to be executed at table load time. Although illegal since ACPI 2.0, this type
154 of code still exists and is apparently still being created. Blocks of this
155 code are now detected and executed as intended. Currently, the code blocks
156 must exist under either an If, Else, or While construct; these are the
157 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
159 Implemented an automatic dynamic repair for predefined names that return
160 nested Package objects. This applies to predefined names that are defined to
161 return a variable-length Package of sub-packages. If the number of sub-
162 packages is one, BIOS code is occasionally seen that creates a simple single
163 package with no sub-packages. This code attempts to fix the problem by
164 wrapping a new package object around the existing package. These methods can
165 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
168 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
169 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
172 Fixed a problem with AcpiReset where the reset would silently fail if the
173 register was one of the protected I/O ports. AcpiReset now bypasses the port
174 validation mechanism. This may eventually be driven into the AcpiRead/Write
177 Fixed a regression related to the recent update of the AcpiRead/Write
178 interfaces. A sleep/suspend could fail if the optional PM2 Control register
179 does not exist during an attempt to write the Bus Master Arbitration bit.
180 (However, some hosts already delete the code that writes this bit, and the
181 code may in fact be obsolete at this date.) ACPICA BZ 799.
183 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
184 in succession. ACPICA BZ 795.
186 Example Code and Data Size: These are the sizes for the OS-independent
187 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
188 debug version of the code includes the debug output trace mechanism and has a
189 much larger code and data size.
192 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
193 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
195 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
196 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
198 2) iASL Compiler/Disassembler and Tools:
200 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
201 changes to existing tables. ACPICA BZ 775.
203 ----------------------------------------
204 25 June 2009. Summary of changes for version 20090625:
206 The ACPI 4.0 Specification was released on June 16 and is available at
207 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
208 continue for the next few releases.
210 1) ACPI CA Core Subsystem:
212 ACPI 4.0: Implemented interpreter support for the IPMI operation region
213 address space. Includes support for bi-directional data buffers and an IPMI
214 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
217 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
218 support in both the header files and the disassembler.
220 Completed a major update for the AcpiGetObjectInfo external interface.
222 - Support for variable, unlimited length HID, UID, and CID strings.
223 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
224 - Call the _SxW power methods on behalf of a device object.
225 - Determine if a device is a PCI root bridge.
226 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
227 These changes will require an update to all callers of this interface. See
228 the updated ACPICA Programmer Reference for details. One new source file has
229 been added - utilities/utids.c. ACPICA BZ 368, 780.
231 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
232 transfers. The Value parameter has been extended from 32 bits to 64 bits in
233 order to support new ACPI 4.0 tables. These changes will require an update to
234 all callers of these interfaces. See the ACPICA Programmer Reference for
235 details. ACPICA BZ 768.
237 Fixed several problems with AcpiAttachData. The handler was not invoked when
238 the host node was deleted. The data sub-object was not automatically deleted
239 when the host node was deleted. The interface to the handler had an unused
240 parameter, this was removed. ACPICA BZ 778.
242 Enhanced the function that dumps ACPI table headers. All non-printable
243 characters in the string fields are now replaced with '?' (Signature, OemId,
244 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
245 these fields are occasionally seen in the field. ACPICA BZ 788.
247 Fixed a problem with predefined method repair code where the code that
248 attempts to repair/convert an object of incorrect type is only executed on
249 the first time the predefined method is called. The mechanism that disables
250 warnings on subsequent calls was interfering with the repair mechanism.
253 Fixed a possible memory leak in the predefined validation/repair code when a
254 buffer is automatically converted to an expected string object.
256 Removed obsolete 16-bit files from the distribution and from the current git
257 tree head. ACPICA BZ 776.
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: 83.4K Code, 17.5K Data, 100.9K Total
266 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
268 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
269 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
271 2) iASL Compiler/Disassembler and Tools:
273 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
274 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
276 ACPI 4.0: iASL - implemented compile-time validation support for all new
277 predefined names and control methods (31 total). ACPICA BZ 769.
279 ----------------------------------------
280 21 May 2009. Summary of changes for version 20090521:
282 1) ACPI CA Core Subsystem:
284 Disabled the preservation of the SCI enable bit in the PM1 control register.
285 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
286 a "preserved" bit - "OSPM always preserves this bit position", section
287 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
288 because the bit needs to be explicitly set by the OS as a workaround. No
289 machines fail if the bit is not preserved. Therefore, ACPICA no longer
290 attempts to preserve this bit.
292 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
293 incorrectly formed _PRT package could cause a fault. Added validation to
294 ensure that each package element is actually a sub-package.
296 Implemented a new interface to install or override a single control method,
297 AcpiInstallMethod. This interface is useful when debugging in order to repair
298 an existing method or to install a missing method without having to override
299 the entire ACPI table. See the ACPICA Programmer Reference for use and
300 examples. Lin Ming, Bob Moore.
302 Fixed several reference count issues with the DdbHandle object that is
303 created from a Load or LoadTable operator. Prevent premature deletion of the
304 object. Also, mark the object as invalid once the table has been unloaded.
305 This is needed because the handle itself may not be deleted after the table
306 unload, depending on whether it has been stored in a named object by the
309 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
310 mutexes of the same sync level are acquired but then not released in strict
311 opposite order, the internally maintained Current Sync Level becomes confused
312 and can cause subsequent execution errors. ACPICA BZ 471.
314 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
315 specification has been changed to make the SyncLevel for mutex objects more
316 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
317 same as the current sync level. This makes more sense than the previous rule
318 (SyncLevel less than or equal). This change updates the code to match the
321 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
322 (local) cache must be locked during all cache object deletions. Andrew
325 Updated the Load operator to use operation region interfaces. This replaces
326 direct memory mapping with region access calls. Now, all region accesses go
327 through the installed region handler as they should.
329 Simplified and optimized the NsGetNextNode function. Reduced parameter count
330 and reduced code for this frequently used function.
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: 82.8K Code, 17.5K Data, 100.3K Total
339 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
341 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
342 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
344 2) iASL Compiler/Disassembler and Tools:
346 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
347 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
348 after an invalid sub-table ID.
350 ----------------------------------------
351 22 April 2009. Summary of changes for version 20090422:
353 1) ACPI CA Core Subsystem:
355 Fixed a compatibility issue with the recently released I/O port protection
356 mechanism. For windows compatibility, 1) On a port protection violation,
357 simply ignore the request and do not return an exception (allow the control
358 method to continue execution.) 2) If only part of the request overlaps a
359 protected port, read/write the individual ports that are not protected. Linux
362 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
363 breaks into the AML debugger if the debugger is present. This matches the
364 ACPI-defined behavior.
366 Fixed several possible warnings related to the use of the configurable
367 ACPI_THREAD_ID. This type can now be configured as either an integer or a
368 pointer with no warnings. Also fixes several warnings in printf-like
369 statements for the 64-bit build when the type is configured as a pointer.
372 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
373 warning options.) Examples include printf formats, aliasing, unused globals,
374 missing prototypes, missing switch default statements, use of non-ANSI
375 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
376 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
378 Example Code and Data Size: These are the sizes for the OS-independent
379 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
380 debug version of the code includes the debug output trace mechanism and has a
381 much larger code and data size.
384 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
385 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
387 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
388 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
390 2) iASL Compiler/Disassembler and Tools:
392 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
395 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
396 correctly digest Windows/DOS formatted files (with CR/LF).
398 iASL: Added a new option for "quiet mode" (-va) that produces only the
399 compilation summary, not individual errors and warnings. Useful for large
402 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
403 timeout that can be used to detect hang conditions during execution of AML
404 code (includes both internal semaphores and AML-defined mutexes and events.)
406 Added new makefiles for the generation of acpica in a generic unix-like
407 environment. These makefiles are intended to generate the acpica tools and
408 utilities from the original acpica git source tree structure.
410 Test Suites: Updated and cleaned up the documentation files. Updated the
411 copyrights to 2009, affecting all source files. Use the new version of iASL
412 with quiet mode. Increased the number of available semaphores in the Windows
413 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
414 an alternate implementation of the semaphore timeout to allow aslts to
415 execute fully on Cygwin.
417 ----------------------------------------
418 20 March 2009. Summary of changes for version 20090320:
420 1) ACPI CA Core Subsystem:
422 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
423 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
424 namespace walks (readers), but block a dynamic table unload until it can gain
425 exclusive write access to the namespace. This fixes a problem where a table
426 unload could (possibly catastrophically) delete the portion of the namespace
427 that is currently being examined by a walk. Adds a new file, utlock.c, that
428 implements the reader/writer lock mechanism. ACPICA BZ 749.
430 Fixed a regression introduced in version 20090220 where a change to the FADT
431 handling could cause the ACPICA subsystem to access non-existent I/O ports.
433 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
434 FADT can contain both 32-bit and 64-bit versions of these addresses.
435 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
436 versions were valid, but not equal, the 64-bit version was used. This was
437 found to cause some machines to fail. Now, in this case, the 32-bit version
438 is used instead. This now matches the Windows behavior.
440 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
441 compatibility and protects the standard PC I/O ports from access via AML
442 code. Adds a new file, hwvalid.c
444 Fixed a possible extraneous warning message from the FADT support. The
445 message warns of a 32/64 length mismatch between the legacy and GAS
446 definitions for a register.
448 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
449 made obsolete by the port protection mechanism above. It was previously used
450 to validate the entire address range of an operation region, which could be
451 incorrect if the range included illegal ports, but fields within the
452 operation region did not actually access those ports. Validation is now
453 performed on a per-field basis instead of the entire region.
455 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
456 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
457 means a read/modify/write when writing to the register. However, for status
458 registers, writing a one means clear the event. Writing a zero means preserve
459 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
460 and the ACPICA code now simply always writes a zero to the ignored bit.
462 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
463 per the ACPI specification, for the control registers, preserve
464 (read/modify/write) all bits that are defined as either reserved or ignored.
466 Updated the handling of write-only bits in the PM1 A/B Control Registers.
467 When reading the register, zero the write-only bits as per the ACPI spec.
468 ACPICA BZ 443. Lin Ming.
470 Removed "Linux" from the list of supported _OSI strings. Linux no longer
471 wants to reply true to this request. The Windows strings are the only paths
472 through the AML that are tested and known to work properly.
475 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
476 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
478 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
479 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
481 2) iASL Compiler/Disassembler and Tools:
483 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
486 ----------------------------------------
487 20 February 2009. Summary of changes for version 20090220:
489 1) ACPI CA Core Subsystem:
491 Optimized the ACPI register locking. Removed locking for reads from the ACPI
492 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
493 not required when reading the single-bit registers. The
494 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
495 This will improve performance for reads on these registers. ACPICA BZ 760.
497 Fixed the parameter validation for AcpiRead/Write. Now return
498 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
499 the register has an address of zero. Previously, these cases simply returned
500 AE_OK. For optional registers such as PM1B status/enable/control, the caller
501 should check for a valid register address before calling. ACPICA BZ 748.
503 Renamed the external ACPI bit register access functions. Renamed
504 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
505 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
506 Also, restructured the code for these functions by simplifying the code path
507 and condensing duplicate code to reduce code size.
509 Added new functions to transparently handle the possibly split PM1 A/B
510 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
511 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
514 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
515 This function writes both of the PM1 control registers (A/B). These registers
516 are different than the PM1 A/B status and enable registers in that different
517 values can be written to the A/B registers. Most notably, the SLP_TYP bits
518 can be different, as per the values returned from the _Sx predefined methods.
520 Removed an extra register write within AcpiHwClearAcpiStatus. This function
521 was writing an optional PM1B status register twice. The existing call to the
522 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
523 register. ACPICA BZ 751.
525 Split out the PM1 Status registers from the FADT. Added new globals for these
526 registers (A/B), similar to the way the PM1 Enable registers are handled.
527 Instead of overloading the FADT Event Register blocks. This makes the code
528 clearer and less prone to error.
530 Fixed the warning message for when the platform contains too many ACPI tables
531 for the default size of the global root table data structure. The calculation
532 for the truncation value was incorrect.
534 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
535 obsolete macro, since it is now a simple reference to ->common.type. There
536 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
538 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
539 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
540 simply SLEEP_TYPE. ACPICA BZ 754.
542 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
543 function is only needed on 64-bit host operating systems and is thus not
544 included for 32-bit hosts.
546 Debug output: print the input and result for invocations of the _OSI reserved
547 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
548 verbosity of this debug level. Len Brown.
550 Example Code and Data Size: These are the sizes for the OS-independent
551 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
552 debug version of the code includes the debug output trace mechanism and has a
553 much larger code and data size.
556 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
557 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
559 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
560 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
562 2) iASL Compiler/Disassembler and Tools:
564 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
565 various legal performance profiles.
567 ----------------------------------------
568 23 January 2009. Summary of changes for version 20090123:
570 1) ACPI CA Core Subsystem:
572 Added the 2009 copyright to all module headers and signons. This affects
573 virtually every file in the ACPICA core subsystem, the iASL compiler, and
576 Implemented a change to allow the host to override any ACPI table, including
577 dynamically loaded tables. Previously, only the DSDT could be replaced by the
578 host. With this change, the AcpiOsTableOverride interface is called for each
579 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
580 a table is dynamically loaded via the AML Load operator.
582 Updated FADT flag definitions, especially the Boot Architecture flags.
584 Debugger: For the Find command, automatically pad the input ACPI name with
585 underscores if the name is shorter than 4 characters. This enables a match
586 with the actual namespace entry which is itself padded with underscores.
588 Example Code and Data Size: These are the sizes for the OS-independent
589 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
590 debug version of the code includes the debug output trace mechanism and has a
591 much larger code and data size.
594 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
595 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
597 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
598 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
600 2) iASL Compiler/Disassembler and Tools:
602 Fix build error under Bison-2.4.
604 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
605 flags. Now decode all flags, regardless of the FADT version. Flag output
606 includes the FADT version which first defined each flag.
608 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
611 ----------------------------------------
612 04 December 2008. Summary of changes for version 20081204:
614 1) ACPI CA Core Subsystem:
616 The ACPICA Programmer Reference has been completely updated and revamped for
617 this release. This includes updates to the external interfaces, OSL
618 interfaces, the overview sections, and the debugger reference.
620 Several new ACPICA interfaces have been implemented and documented in the
621 programmer reference:
622 AcpiReset - Writes the reset value to the FADT-defined reset register.
623 AcpiDisableAllGpes - Disable all available GPEs.
624 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
625 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
626 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
627 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
628 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
630 Most of the public ACPI hardware-related interfaces have been moved to a new
631 file, components/hardware/hwxface.c
633 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
634 register lengths within the FADT are now used, and the low level ACPI
635 register access no longer hardcodes the ACPI register lengths. Given that
636 there may be some risk in actually trusting the FADT register lengths, a run-
637 time option was added to fall back to the default hardcoded lengths if the
638 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
639 option is set to true for now, and a warning is issued if a suspicious FADT
640 register length is overridden with the default value.
642 Fixed a reference count issue in NsRepairObject. This problem was introduced
643 in version 20081031 as part of a fix to repair Buffer objects within
646 Added semaphore support to the Linux/Unix application OS-services layer
647 (OSL). ACPICA BZ 448. Lin Ming.
649 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
650 be implemented in the OSL, or will binary semaphores be used instead.
652 Example Code and Data Size: These are the sizes for the OS-independent
653 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
654 debug version of the code includes the debug output trace mechanism and has a
655 much larger code and data size.
658 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
659 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
661 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
662 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
664 2) iASL Compiler/Disassembler and Tools:
666 iASL: Completed the '-e' option to include additional ACPI tables in order to
667 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
670 iASL: Removed the "named object in while loop" error. The compiler cannot
671 determine how many times a loop will execute. ACPICA BZ 730.
673 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
676 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
678 ----------------------------------------
679 31 October 2008. Summary of changes for version 20081031:
681 1) ACPI CA Core Subsystem:
683 Restructured the ACPICA header files into public/private. acpi.h now includes
684 only the "public" acpica headers. All other acpica headers are "private" and
685 should not be included by acpica users. One new file, accommon.h is used to
686 include the commonly used private headers for acpica code generation. Future
687 plans include moving all private headers to a new subdirectory.
689 Implemented an automatic Buffer->String return value conversion for
690 predefined ACPI methods. For these methods (such as _BIF), added automatic
691 conversion for return objects that are required to be a String, but a Buffer
692 was found instead. This can happen when reading string battery data from an
693 operation region, because it used to be difficult to convert the data from
694 buffer to string from within the ASL. Ensures that the host OS is provided
695 with a valid null-terminated string. Linux BZ 11822.
697 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
698 into two: one for the 32-bit vector, another for the 64-bit vector. This is
699 required because the host OS must setup the wake much differently for each
700 vector (real vs. protected mode, etc.) and the interface itself should not be
701 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
702 interface, as it served no purpose (only the firmware reads the vector, OS
703 only writes the vector.) ACPICA BZ 731.
705 Implemented a mechanism to escape infinite AML While() loops. Added a loop
706 counter to force exit from AML While loops if the count becomes too large.
707 This can occur in poorly written AML when the hardware does not respond
708 within a while loop and the loop does not implement a timeout. The maximum
709 loop count is configurable. A new exception code is returned when a loop is
710 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
712 Optimized the execution of AML While loops. Previously, a control state
713 object was allocated and freed for each execution of the loop. The
714 optimization is to simply reuse the control state for each iteration. This
715 speeds up the raw loop execution time by about 5%.
717 Enhanced the implicit return mechanism. For Windows compatibility, return an
718 implicit integer of value zero for methods that contain no executable code.
719 Such methods are seen in the field as stubs (presumably), and can cause
720 drivers to fail if they expect a return value. Lin Ming.
722 Allow multiple backslashes as root prefixes in namepaths. In a fully
723 qualified namepath, allow multiple backslash prefixes. This can happen (and
724 is seen in the field) because of the use of a double-backslash in strings
725 (since backslash is the escape character) causing confusion. ACPICA BZ 739
728 Emit a warning if two different FACS or DSDT tables are discovered in the
729 FADT. Checks if there are two valid but different addresses for the FACS and
730 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
732 Consolidated the method argument count validation code. Merged the code that
733 validates control method argument counts into the predefined validation
734 module. Eliminates possible multiple warnings for incorrect argument counts.
736 Implemented ACPICA example code. Includes code for ACPICA initialization,
737 handler installation, and calling a control method. Available at
738 source/tools/examples.
740 Added a global pointer for FACS table to simplify internal FACS access. Use
741 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
742 This simplifies the code for the Global Lock and the Firmware Waking
745 Example Code and Data Size: These are the sizes for the OS-independent
746 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
747 debug version of the code includes the debug output trace mechanism and has a
748 much larger code and data size.
751 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
752 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
754 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
755 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
757 2) iASL Compiler/Disassembler and Tools:
759 iASL: Improved disassembly of external method calls. Added the -e option to
760 allow the inclusion of additional ACPI tables to help with the disassembly of
761 method invocations and the generation of external declarations during the
762 disassembly. Certain external method invocations cannot be disassembled
763 properly without the actual declaration of the method. Use the -e option to
764 include the table where the external method(s) are actually declared. Most
765 useful for disassembling SSDTs that make method calls back to the master
766 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
767 -e dsdt.aml ssdt1.aml
769 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
770 problem where the use of an alias within a namepath would result in a not
771 found error or cause the compiler to fault. Also now allows forward
772 references from the Alias operator itself. ACPICA BZ 738.
774 ----------------------------------------
775 26 September 2008. Summary of changes for version 20080926:
777 1) ACPI CA Core Subsystem:
779 Designed and implemented a mechanism to validate predefined ACPI methods and
780 objects. This code validates the predefined ACPI objects (objects whose names
781 start with underscore) that appear in the namespace, at the time they are
782 evaluated. The argument count and the type of the returned object are
783 validated against the ACPI specification. The purpose of this validation is
784 to detect problems with the BIOS-implemented predefined ACPI objects before
785 the results are returned to the ACPI-related drivers. Future enhancements may
786 include actual repair of incorrect return objects where possible. Two new
787 files are nspredef.c and acpredef.h.
789 Fixed a fault in the AML parser if a memory allocation fails during the Op
790 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
792 Fixed an issue with implicit return compatibility. This change improves the
793 implicit return mechanism to be more compatible with the MS interpreter. Lin
796 Implemented support for zero-length buffer-to-string conversions. Allow zero
797 length strings during interpreter buffer-to-string conversions. For example,
798 during the ToDecimalString and ToHexString operators, as well as implicit
799 conversions. Fiodor Suietov, ACPICA BZ 585.
801 Fixed two possible memory leaks in the error exit paths of
802 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
803 similar in that they use a stack of state objects in order to eliminate
804 recursion. The stack must be fully unwound and deallocated if an error
805 occurs. Lin Ming. ACPICA BZ 383.
807 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
808 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
811 Removed the obsolete version number in module headers. Removed the
812 "$Revision" number that appeared in each module header. This version number
813 was useful under SourceSafe and CVS, but has no meaning under git. It is not
814 only incorrect, it could also be misleading.
816 Example Code and Data Size: These are the sizes for the OS-independent
817 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
818 debug version of the code includes the debug output trace mechanism and has a
819 much larger code and data size.
822 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
823 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
825 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
826 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
828 ----------------------------------------
829 29 August 2008. Summary of changes for version 20080829:
831 1) ACPI CA Core Subsystem:
833 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
834 Reference. Changes include the elimination of cheating on the Object field
835 for the DdbHandle subtype, addition of a reference class field to
836 differentiate the various reference types (instead of an AML opcode), and the
837 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
839 Reduce an error to a warning for an incorrect method argument count.
840 Previously aborted with an error if too few arguments were passed to a
841 control method via the external ACPICA interface. Now issue a warning instead
842 and continue. Handles the case where the method inadvertently declares too
843 many arguments, but does not actually use the extra ones. Applies mainly to
844 the predefined methods. Lin Ming. Linux BZ 11032.
846 Disallow the evaluation of named object types with no intrinsic value. Return
847 AE_TYPE for objects that have no value and therefore evaluation is undefined:
848 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
849 these types were allowed, but an exception would be generated at some point
850 during the evaluation. Now, the error is generated up front.
852 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
853 (nsnames.c). Fixes a leak in the error exit path.
855 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
856 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
857 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
860 Removed obsolete and/or unused exception codes from the acexcep.h header.
861 There is the possibility that certain device drivers may be affected if they
862 use any of these exceptions.
864 The ACPICA documentation has been added to the public git source tree, under
865 acpica/documents. Included are the ACPICA programmer reference, the iASL
866 compiler reference, and the changes.txt release logfile.
868 Example Code and Data Size: These are the sizes for the OS-independent
869 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
870 debug version of the code includes the debug output trace mechanism and has a
871 much larger code and data size.
874 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
875 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
877 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
878 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
880 2) iASL Compiler/Disassembler and Tools:
882 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
883 defines _SCP with 3 arguments. Previous versions defined it with only 1
884 argument. iASL now allows both definitions.
886 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
887 length subtables when disassembling ACPI tables. Also fixed a couple of
888 errors where a full 16-bit table type field was not extracted from the input
891 acpisrc: Improve comment counting mechanism for generating source code
892 statistics. Count first and last lines of multi-line comments as whitespace,
893 not comment lines. Handle Linux legal header in addition to standard acpica
896 ----------------------------------------
898 29 July 2008. Summary of changes for version 20080729:
900 This release is available at http://acpica.org/downloads
901 Direct git access via http://www.acpica.org/repos/acpica.git
903 1) ACPI CA Core Subsystem:
905 Fix a possible deadlock in the GPE dispatch. Remove call to
906 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
907 to acquire the GPE lock but can deadlock since the GPE lock is already held
908 at dispatch time. This code was introduced in version 20060831 as a response
909 to Linux BZ 6881 and has since been removed from Linux.
911 Add a function to dereference returned reference objects. Examines the return
912 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
913 automatically dereferenced in an attempt to return something useful (these
914 reference types cannot be converted into an external ACPI_OBJECT.) Provides
915 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
917 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
918 subtables for the MADT and one new subtable for the SRAT. Includes
919 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
920 Specification, June 2008.
922 Additional error checking for pathname utilities. Add error check after all
923 calls to AcpiNsGetPathnameLength. Add status return from
924 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
925 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
927 Return status from the global init function AcpiUtGlobalInitialize. This is
928 used by both the kernel subsystem and the utilities such as iASL compiler.
929 The function could possibly fail when the caches are initialized. Yang Yi.
931 Add a function to decode reference object types to strings. Created for
932 improved error messages.
934 Improve object conversion error messages. Better error messages during object
935 conversion from internal to the external ACPI_OBJECT. Used for external calls
936 to AcpiEvaluateObject.
938 Example Code and Data Size: These are the sizes for the OS-independent
939 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
940 debug version of the code includes the debug output trace mechanism and has a
941 much larger code and data size.
944 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
945 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
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 2) iASL Compiler/Disassembler and Tools:
952 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
953 introduced in version 20080701. If the object being evaluated (via execute
954 command) is not a method, the debugger can hang while trying to obtain non-
957 iASL: relax error for using reserved "_T_x" identifiers. These names can
958 appear in a disassembled ASL file if they were emitted by the original
959 compiler. Instead of issuing an error or warning and forcing the user to
960 manually change these names, issue a remark instead.
962 iASL: error if named object created in while loop. Emit an error if any named
963 object is created within a While loop. If allowed, this code will generate a
964 run-time error on the second iteration of the loop when an attempt is made to
965 create the same named object twice. ACPICA bugzilla 730.
967 iASL: Support absolute pathnames for include files. Add support for absolute
968 pathnames within the Include operator. previously, only relative pathnames
971 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
972 The ACPI spec requires one interrupt minimum. BZ 423
974 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
975 Handles the case for the Interrupt Resource Descriptor where
976 the ResourceSource argument is omitted but ResourceSourceIndex
977 is present. Now leave room for the Index. BZ 426
979 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
980 where an error message is emitted if the target does not exist. BZ 516
982 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
983 (get ACPI tables on Windows). This was apparently broken in version 20070919.
985 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
986 the EOF happens immediately after the last table in the input file. Print
987 completion message. Previously, no message was displayed in this case.
989 ----------------------------------------
990 01 July 2008. Summary of changes for version 20080701:
992 This release is available at http://acpica.org/downloads
993 Direct git access via http://www.acpica.org/repos/acpica.git
995 0) Git source tree / acpica.org
997 Fixed a problem where a git-clone from http would not transfer the entire
1000 1) ACPI CA Core Subsystem:
1002 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
1003 enable bit. Now performs a read-change-write of the enable register instead
1004 of simply writing out the cached enable mask. This will prevent inadvertent
1005 enabling of GPEs if a rogue GPE is received during initialization (before GPE
1006 handlers are installed.)
1008 Implemented a copy for dynamically loaded tables. Previously, dynamically
1009 loaded tables were simply mapped - but on some machines this memory is
1010 corrupted after suspend. Now copy the table to a local buffer. For the
1011 OpRegion case, added checksum verify. Use the table length from the table
1012 header, not the region length. For the Buffer case, use the table length
1013 also. Dennis Noordsij, Bob Moore. BZ 10734
1015 Fixed a problem where the same ACPI table could not be dynamically loaded and
1016 unloaded more than once. Without this change, a table cannot be loaded again
1017 once it has been loaded/unloaded one time. The current mechanism does not
1018 unregister a table upon an unload. During a load, if the same table is found,
1019 this no longer returns an exception. BZ 722
1021 Fixed a problem where the wrong descriptor length was calculated for the
1022 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
1023 are calculated as 12 bytes long, but the actual length in the internal
1024 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
1025 by Linn Crosetto. BZ 728
1027 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
1028 by Load() did not have its reference count decremented during unload, leading
1029 to a memory leak. Lin Ming. BZ 727
1031 Fixed a possible memory leak when deleting thermal/processor objects. Any
1032 associated notify handlers (and objects) were not being deleted. Fiodor
1035 Fixed the ordering of the ASCII names in the global mutex table to match the
1036 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
1037 Vegard Nossum. BZ 726
1039 Enhanced the AcpiGetObjectInfo interface to return the number of required
1040 arguments if the object is a control method. Added this call to the debugger
1041 so the proper number of default arguments are passed to a method. This
1042 prevents a warning when executing methods from AcpiExec.
1044 Added a check for an invalid handle in AcpiGetObjectInfo. Return
1045 AE_BAD_PARAMETER if input handle is invalid. BZ 474
1047 Fixed an extraneous warning from exconfig.c on the 64-bit build.
1049 Example Code and Data Size: These are the sizes for the OS-independent
1050 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1051 debug version of the code includes the debug output trace mechanism and has a
1052 much larger code and data size.
1055 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1056 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1058 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1059 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1061 2) iASL Compiler/Disassembler and Tools:
1063 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
1064 resource descriptor names.
1066 iASL: Detect invalid ASCII characters in input (windows version). Removed the
1067 "-CF" flag from the flex compile, enables correct detection of non-ASCII
1068 characters in the input. BZ 441
1070 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
1071 "result of operation not used" warning when the DDB handle returned from
1072 LoadTable is not used. The warning is not needed. BZ 590
1074 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
1075 pass address of table to the AML. Added option to disable OpRegion simulation
1076 to allow creation of an OpRegion with a real address that was passed to _CFG.
1077 All of this allows testing of the Load and Unload operators from AcpiExec.
1079 Debugger: update tables command for unloaded tables. Handle unloaded tables
1080 and use the standard table header output routine.
1082 ----------------------------------------
1083 09 June 2008. Summary of changes for version 20080609:
1085 1) ACPI CA Core Subsystem:
1087 Implemented a workaround for reversed _PRT entries. A significant number of
1088 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
1089 change dynamically detects and repairs this problem. Provides compatibility
1090 with MS ACPI. BZ 6859
1092 Simplified the internal ACPI hardware interfaces to eliminate the locking
1093 flag parameter from Register Read/Write. Added a new external interface,
1094 AcpiGetRegisterUnlocked.
1096 Fixed a problem where the invocation of a GPE control method could hang. This
1097 was a regression introduced in 20080514. The new method argument count
1098 validation mechanism can enter an infinite loop when a GPE method is
1099 dispatched. Problem fixed by removing the obsolete code that passed GPE block
1100 information to the notify handler via the control method parameter pointer.
1102 Fixed a problem where the _SST execution status was incorrectly returned to
1103 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
1104 20080514. _SST is optional and a NOT_FOUND exception should never be
1107 Fixed a problem where a deleted object could be accessed from within the AML
1108 parser. This was a regression introduced in version 20080123 as a fix for the
1109 Unload operator. Lin Ming. BZ 10669
1111 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
1112 and eliminated the use of a negative index in a loop. Operands are now
1113 displayed in the correct order, not backwards. This also fixes a regression
1114 introduced in 20080514 on 64-bit systems where the elimination of
1115 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
1117 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
1118 path did not delete a locally allocated structure.
1120 Updated definitions for the DMAR and SRAT tables to synchronize with the
1121 current specifications. Includes disassembler support.
1123 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
1124 loop termination value was used. Loop terminated on iteration early, missing
1125 one mutex. Linn Crosetto
1127 Example Code and Data Size: These are the sizes for the OS-independent
1128 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1129 debug version of the code includes the debug output trace mechanism and has a
1130 much larger code and data size.
1133 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1134 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1136 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1137 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1139 2) iASL Compiler/Disassembler and Tools:
1141 Disassembler: Implemented support for EisaId() within _CID objects. Now
1142 disassemble integer _CID objects back to EisaId invocations, including
1143 multiple integers within _CID packages. Includes single-step support for
1146 Disassembler: Added support for DMAR and SRAT table definition changes.
1148 ----------------------------------------
1149 14 May 2008. Summary of changes for version 20080514:
1151 1) ACPI CA Core Subsystem:
1153 Fixed a problem where GPEs were enabled too early during the ACPICA
1154 initialization. This could lead to "handler not installed" errors on some
1155 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
1156 ensures that all operation regions and devices throughout the namespace have
1157 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
1159 Implemented a change to the enter sleep code. Moved execution of the _GTS
1160 method to just before setting sleep enable bit. The execution was moved from
1161 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
1162 immediately before the SLP_EN bit is set, as per the ACPI specification.
1165 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
1166 the GPE, even if ACPICA thinks that that it is already disabled. It is
1167 possible that the AML or some other code has enabled the GPE unbeknownst to
1170 Fixed a problem with the Field operator where zero-length fields would return
1171 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
1172 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
1174 Implemented a fix for the Load operator, now load the table at the namespace
1175 root. This reverts a change introduced in version 20071019. The table is now
1176 loaded at the namespace root even though this goes against the ACPI
1177 specification. This provides compatibility with other ACPI implementations.
1178 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
1180 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
1181 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
1182 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
1183 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
1184 signatures, ACPICA must be compatible. BZ 10454.
1186 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
1187 fields to the exception string arrays to eliminate a -1 subtraction on the
1190 Updated the debug tracking macros to reduce overall code and data size.
1191 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
1192 instead of pointers to static strings. Jan Beulich and Bob Moore.
1194 Implemented argument count checking in control method invocation via
1195 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
1196 many. This applies only to extern programmatic control method execution, not
1197 method-to-method calls within the AML. Lin Ming.
1199 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
1200 longer needed, especially with the removal of 16-bit support. It was replaced
1201 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
1202 32/64-bit platforms is required.
1204 Added the C const qualifier for appropriate string constants -- mostly
1205 MODULE_NAME and printf format strings. Jan Beulich.
1207 Example Code and Data Size: These are the sizes for the OS-independent
1208 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1209 debug version of the code includes the debug output trace mechanism and has a
1210 much larger code and data size.
1213 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1214 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1216 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1217 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1219 2) iASL Compiler/Disassembler and Tools:
1221 Implemented ACPI table revision ID validation in the disassembler. Zero is
1222 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
1223 means 32-bit and this is unusual. 2 or greater is 64-bit.
1225 ----------------------------------------
1226 21 March 2008. Summary of changes for version 20080321:
1228 1) ACPI CA Core Subsystem:
1230 Implemented an additional change to the GPE support in order to suppress
1231 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
1232 disable incoming GPEs that are neither enabled nor disabled -- meaning that
1233 the GPE is unknown to the system. This should prevent future interrupt floods
1234 from that GPE. BZ 6217 (Zhang Rui)
1236 Fixed a problem where NULL package elements were not returned to the
1237 AcpiEvaluateObject interface correctly. The element was simply ignored
1238 instead of returning a NULL ACPI_OBJECT package element, potentially causing
1239 a buffer overflow and/or confusing the caller who expected a fixed number of
1240 elements. BZ 10132 (Lin Ming, Bob Moore)
1242 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
1243 Qword), Field, BankField, and IndexField operators when invoked from inside
1244 an executing control method. In this case, these operators created namespace
1245 nodes that were incorrectly left marked as permanent nodes instead of
1246 temporary nodes. This could cause a problem if there is race condition
1247 between an exiting control method and a running namespace walk. (Reported by
1250 Fixed a problem where the CreateField and CreateXXXField operators would
1251 incorrectly allow duplicate names (the name of the field) with no exception
1254 Implemented several changes for Notify handling. Added support for new Notify
1255 values (ACPI 2.0+) and improved the Notify debug output. Notify on
1256 PowerResource objects is no longer allowed, as per the ACPI specification.
1257 (Bob Moore, Zhang Rui)
1259 All Reference Objects returned via the AcpiEvaluateObject interface are now
1260 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
1261 NULL objects - either NULL package elements or unresolved named references.
1263 Fixed a problem where an extraneous debug message was produced for package
1264 objects (when debugging enabled). The message "Package List length larger
1265 than NumElements count" is now produced in the correct case, and is now an
1266 error message rather than a debug message. Added a debug message for the
1267 opposite case, where NumElements is larger than the Package List (the package
1268 will be padded out with NULL elements as per the ACPI spec.)
1270 Implemented several improvements for the output of the ASL "Debug" object to
1271 clarify and keep all data for a given object on one output line.
1273 Fixed two size calculation issues with the variable-length Start Dependent
1274 resource descriptor.
1276 Example Code and Data Size: These are the sizes for the OS-independent
1277 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1278 debug version of the code includes the debug output trace mechanism and has
1279 a much larger code and data size.
1282 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1283 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1285 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1286 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1288 2) iASL Compiler/Disassembler and Tools:
1290 Fixed a problem with the use of the Switch operator where execution of the
1291 containing method by multiple concurrent threads could cause an
1292 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
1293 actual Switch opcode, it must be simulated with local named temporary
1294 variables and if/else pairs. The solution chosen was to mark any method that
1295 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
1297 ----------------------------------------
1298 13 February 2008. Summary of changes for version 20080213:
1300 1) ACPI CA Core Subsystem:
1302 Implemented another MS compatibility design change for GPE/Notify handling.
1303 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
1304 complete first. It is expected that the OSL will queue the enable request
1305 behind all pending notify requests (may require changes to the local host OSL
1306 in AcpiOsExecute). Alexey Starikovskiy.
1308 Fixed a problem where buffer and package objects passed as arguments to a
1309 control method via the external AcpiEvaluateObject interface could cause an
1310 AE_AML_INTERNAL exception depending on the order and type of operators
1311 executed by the target control method.
1313 Fixed a problem where resource descriptor size optimization could cause a
1314 problem when a _CRS resource template is passed to a _SRS method. The _SRS
1315 resource template must use the same descriptors (with the same size) as
1316 returned from _CRS. This change affects the following resource descriptors:
1317 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
1319 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
1320 objects did not perform an implicit conversion as it should. These types must
1321 retain their initial type permanently as per the ACPI specification. However,
1322 a CopyObject to all other object types should not perform an implicit
1323 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
1325 Fixed a problem with the AcpiGetDevices interface where the mechanism to
1326 match device CIDs did not examine the entire list of available CIDs, but
1327 instead aborted on the first non-matching CID. Andrew Patterson.
1329 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
1330 inadvertently changed to return a 16-bit value instead of a 32-bit value,
1331 truncating the upper dword of a 64-bit value. This macro is only used to
1332 display debug output, so no incorrect calculations were made. Also,
1333 reimplemented the macro so that a 64-bit shift is not performed by
1334 inefficient compilers.
1336 Added missing va_end statements that should correspond with each va_start
1339 Example Code and Data Size: These are the sizes for the OS-independent
1340 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1341 debug version of the code includes the debug output trace mechanism and has
1342 a much larger code and data size.
1345 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1346 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1348 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1349 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1351 2) iASL Compiler/Disassembler and Tools:
1353 Implemented full disassembler support for the following new ACPI tables:
1354 BERT, EINJ, and ERST. Implemented partial disassembler support for the
1355 complicated HEST table. These tables support the Windows Hardware Error
1356 Architecture (WHEA).
1358 ----------------------------------------
1359 23 January 2008. Summary of changes for version 20080123:
1361 1) ACPI CA Core Subsystem:
1363 Added the 2008 copyright to all module headers and signons. This affects
1364 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1365 the tools/utilities.
1367 Fixed a problem with the SizeOf operator when used with Package and Buffer
1368 objects. These objects have deferred execution for some arguments, and the
1369 execution is now completed before the SizeOf is executed. This problem caused
1370 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
1373 Implemented an enhancement to the interpreter "slack mode". In the absence of
1374 an explicit return or an implicitly returned object from the last executed
1375 opcode, a control method will now implicitly return an integer of value 0 for
1376 Microsoft compatibility. (Lin Ming) BZ 392
1378 Fixed a problem with the Load operator where an exception was not returned in
1379 the case where the table is already loaded. (Lin Ming) BZ 463
1381 Implemented support for the use of DDBHandles as an Indexed Reference, as per
1382 the ACPI spec. (Lin Ming) BZ 486
1384 Implemented support for UserTerm (Method invocation) for the Unload operator
1385 as per the ACPI spec. (Lin Ming) BZ 580
1387 Fixed a problem with the LoadTable operator where the OemId and OemTableId
1388 input strings could cause unexpected failures if they were shorter than the
1389 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
1391 Implemented support for UserTerm (Method invocation) for the Unload operator
1392 as per the ACPI spec. (Lin Ming) BZ 580
1394 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
1395 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
1397 Example Code and Data Size: These are the sizes for the OS-independent
1398 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1399 debug version of the code includes the debug output trace mechanism and has
1400 a much larger code and data size.
1403 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1404 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1406 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1407 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1409 2) iASL Compiler/Disassembler and Tools:
1411 Implemented support in the disassembler for checksum validation on incoming
1412 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
1413 header dump at the start of the disassembly.
1415 Implemented additional debugging information in the namespace listing file
1416 created during compilation. In addition to the namespace hierarchy, the full
1417 pathname to each namespace object is displayed.
1419 Fixed a problem with the disassembler where invalid ACPI tables could cause
1420 faults or infinite loops.
1422 Fixed an unexpected parse error when using the optional "parameter types"
1423 list in a control method declaration. (Lin Ming) BZ 397
1425 Fixed a problem where two External declarations with the same name did not
1426 cause an error (Lin Ming) BZ 509
1428 Implemented support for full TermArgs (adding Argx, Localx and method
1429 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
1432 ----------------------------------------
1433 19 December 2007. Summary of changes for version 20071219:
1435 1) ACPI CA Core Subsystem:
1437 Implemented full support for deferred execution for the TermArg string
1438 arguments for DataTableRegion. This enables forward references and full
1439 operand resolution for the three string arguments. Similar to OperationRegion
1440 deferred argument execution.) Lin Ming. BZ 430
1442 Implemented full argument resolution support for the BankValue argument to
1443 BankField. Previously, only constants were supported, now any TermArg may be
1444 used. Lin Ming BZ 387, 393
1446 Fixed a problem with AcpiGetDevices where the search of a branch of the
1447 device tree could be terminated prematurely. In accordance with the ACPI
1448 specification, the search down the current branch is terminated if a device
1449 is both not present and not functional (instead of just not present.) Yakui
1452 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
1453 the underlying AML code changed the GPE enable registers. Now, any unknown
1454 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
1455 instead of simply ignored. Rui Zhang.
1457 Fixed a problem with Index Fields where the Index register was incorrectly
1458 limited to a maximum of 32 bits. Now any size may be used.
1460 Fixed a couple memory leaks associated with "implicit return" objects when
1461 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
1463 Example Code and Data Size: These are the sizes for the OS-independent
1464 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1465 debug version of the code includes the debug output trace mechanism and has
1466 a much larger code and data size.
1469 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1470 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1472 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1473 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1475 ----------------------------------------
1476 14 November 2007. Summary of changes for version 20071114:
1478 1) ACPI CA Core Subsystem:
1480 Implemented event counters for each of the Fixed Events, the ACPI SCI
1481 (interrupt) itself, and control methods executed. Named
1482 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
1483 should be useful for debugging and statistics.
1485 Implemented a new external interface, AcpiGetStatistics, to retrieve the
1486 contents of the various event counters. Returns the current values for
1487 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
1488 AcpiMethodCount. The interface can be expanded in the future if new counters
1489 are added. Device drivers should use this interface rather than access the
1492 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
1493 the ShortDivide function worked incorrectly, causing problems with the BCD
1494 functions with large input values. A truncation from 64-bit to 32-bit
1495 inadvertently occurred. Internal BZ 435. Lin Ming
1497 Fixed a problem with Index references passed as method arguments. References
1498 passed as arguments to control methods were dereferenced immediately (before
1499 control was passed to the called method). The references are now correctly
1500 passed directly to the called method. BZ 5389. Lin Ming
1502 Fixed a problem with CopyObject used in conjunction with the Index operator.
1503 The reference was incorrectly dereferenced before the copy. The reference is
1504 now correctly copied. BZ 5391. Lin Ming
1506 Fixed a problem with Control Method references within Package objects. These
1507 references are now correctly generated. This completes the package
1508 construction overhaul that began in version 20071019.
1510 Example Code and Data Size: These are the sizes for the OS-independent
1511 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1512 debug version of the code includes the debug output trace mechanism and has
1513 a much larger code and data size.
1516 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1517 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1519 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1520 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1523 2) iASL Compiler/Disassembler and Tools:
1525 The AcpiExec utility now installs handlers for all of the predefined
1526 Operation Region types. New types supported are: PCI_Config, CMOS, and
1529 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
1530 bit) address fields for the DSDT and FACS within the FADT were not being
1531 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
1534 ----------------------------------------
1535 19 October 2007. Summary of changes for version 20071019:
1537 1) ACPI CA Core Subsystem:
1539 Fixed a problem with the Alias operator when the target of the alias is a
1540 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
1541 Processor, and ThermalZone. In these cases, any children of the original
1542 operator could not be accessed via the alias, potentially causing unexpected
1543 AE_NOT_FOUND exceptions. (BZ 9067)
1545 Fixed a problem with the Package operator where all named references were
1546 created as object references and left otherwise unresolved. According to the
1547 ACPI specification, a Package can only contain Data Objects or references to
1548 control methods. The implication is that named references to Data Objects
1549 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
1550 immediately upon package creation. This is the approach taken with this
1551 change. References to all other named objects (Methods, Devices, Scopes,
1552 etc.) are all now properly created as reference objects. (BZ 5328)
1554 Reverted a change to Notify handling that was introduced in version
1555 20070508. This version changed the Notify handling from asynchronous to
1556 fully synchronous (Device driver Notify handling with respect to the Notify
1557 ASL operator). It was found that this change caused more problems than it
1558 solved and was removed by most users.
1560 Fixed a problem with the Increment and Decrement operators where the type of
1561 the target object could be unexpectedly and incorrectly changed. (BZ 353)
1564 Fixed a problem with the Load and LoadTable operators where the table
1565 location within the namespace was ignored. Instead, the table was always
1566 loaded into the root or current scope. Lin Ming.
1568 Fixed a problem with the Load operator when loading a table from a buffer
1569 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
1571 Fixed a problem with the Debug object where a store of a DdbHandle reference
1572 object to the Debug object could cause a fault.
1574 Added a table checksum verification for the Load operator, in the case where
1575 the load is from a buffer. (BZ 578).
1577 Implemented additional parameter validation for the LoadTable operator. The
1578 length of the input strings SignatureString, OemIdString, and OemTableId are
1579 now checked for maximum lengths. (BZ 582) Lin Ming.
1581 Example Code and Data Size: These are the sizes for the OS-independent
1582 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1583 debug version of the code includes the debug output trace mechanism and has
1584 a much larger code and data size.
1587 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1588 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1590 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1591 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1594 2) iASL Compiler/Disassembler:
1596 Fixed a problem where if a single file was specified and the file did not
1597 exist, no error message was emitted. (Introduced with wildcard support in
1600 ----------------------------------------
1601 19 September 2007. Summary of changes for version 20070919:
1603 1) ACPI CA Core Subsystem:
1605 Designed and implemented new external interfaces to install and remove
1606 handlers for ACPI table-related events. Current events that are defined are
1607 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
1608 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
1609 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
1611 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
1612 (acpi_serialized option on Linux) could cause some systems to hang during
1613 initialization. (Bob Moore) BZ 8171
1615 Fixed a problem where objects of certain types (Device, ThermalZone,
1616 Processor, PowerResource) can be not found if they are declared and
1617 referenced from within the same control method (Lin Ming) BZ 341
1619 Example Code and Data Size: These are the sizes for the OS-independent
1620 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1621 debug version of the code includes the debug output trace mechanism and has
1622 a much larger code and data size.
1625 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1626 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1628 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1629 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1632 2) iASL Compiler/Disassembler:
1634 Implemented support to allow multiple files to be compiled/disassembled in a
1635 single invocation. This includes command line wildcard support for both the
1636 Windows and Unix versions of the compiler. This feature simplifies the
1637 disassembly and compilation of multiple ACPI tables in a single directory.
1639 ----------------------------------------
1640 08 May 2007. Summary of changes for version 20070508:
1642 1) ACPI CA Core Subsystem:
1644 Implemented a Microsoft compatibility design change for the handling of the
1645 Notify AML operator. Previously, notify handlers were dispatched and
1646 executed completely asynchronously in a deferred thread. The new design
1647 still executes the notify handlers in a different thread, but the original
1648 thread that executed the Notify() now waits at a synchronization point for
1649 the notify handler to complete. Some machines depend on a synchronous Notify
1650 operator in order to operate correctly.
1652 Implemented support to allow Package objects to be passed as method
1653 arguments to the external AcpiEvaluateObject interface. Previously, this
1654 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
1655 implemented since there were no reserved control methods that required it
1658 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
1659 contained invalid non-zero values in reserved fields could cause later
1660 failures because these fields have meaning in later revisions of the FADT.
1661 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
1662 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
1664 Fixed a problem where the Global Lock handle was not properly updated if a
1665 thread that acquired the Global Lock via executing AML code then attempted
1666 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
1669 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
1670 could be corrupted if the interrupt being removed was at the head of the
1671 list. Reported by Linn Crosetto.
1673 Example Code and Data Size: These are the sizes for the OS-independent
1674 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1675 debug version of the code includes the debug output trace mechanism and has
1676 a much larger code and data size.
1679 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1680 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1682 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1683 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1685 ----------------------------------------
1686 20 March 2007. Summary of changes for version 20070320:
1688 1) ACPI CA Core Subsystem:
1690 Implemented a change to the order of interpretation and evaluation of AML
1691 operand objects within the AML interpreter. The interpreter now evaluates
1692 operands in the order that they appear in the AML stream (and the
1693 corresponding ASL code), instead of in the reverse order (after the entire
1694 operand list has been parsed). The previous behavior caused several subtle
1695 incompatibilities with the Microsoft AML interpreter as well as being
1696 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
1698 Implemented a change to the ACPI Global Lock support. All interfaces to the
1699 global lock now allow the same thread to acquire the lock multiple times.
1700 This affects the AcpiAcquireGlobalLock external interface to the global lock
1701 as well as the internal use of the global lock to support AML fields -- a
1702 control method that is holding the global lock can now simultaneously access
1703 AML fields that require global lock protection. Previously, in both cases,
1704 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
1705 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
1706 Controller. There is no change to the behavior of the AML Acquire operator,
1707 as this can already be used to acquire a mutex multiple times by the same
1708 thread. BZ 8066. With assistance from Alexey Starikovskiy.
1710 Fixed a problem where invalid objects could be referenced in the AML
1711 Interpreter after error conditions. During operand evaluation, ensure that
1712 the internal "Return Object" field is cleared on error and only valid
1713 pointers are stored there. Caused occasional access to deleted objects that
1714 resulted in "large reference count" warning messages. Valery Podrezov.
1716 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
1717 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
1720 Fixed an internal problem with the handling of result objects on the
1721 interpreter result stack. BZ 7872. Valery Podrezov.
1723 Removed obsolete code that handled the case where AML_NAME_OP is the target
1724 of a reference (Reference.Opcode). This code was no longer necessary. BZ
1725 7874. Valery Podrezov.
1727 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
1728 remnant from the previously discontinued 16-bit support.
1730 Example Code and Data Size: These are the sizes for the OS-independent
1731 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1732 debug version of the code includes the debug output trace mechanism and has
1733 a much larger code and data size.
1736 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1737 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1739 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1740 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1742 ----------------------------------------
1743 26 January 2007. Summary of changes for version 20070126:
1745 1) ACPI CA Core Subsystem:
1747 Added the 2007 copyright to all module headers and signons. This affects
1748 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1751 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
1752 during a table load. A bad pointer was passed in the case where the DSDT is
1753 overridden, causing a fault in this case.
1755 Example Code and Data Size: These are the sizes for the OS-independent
1756 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1757 debug version of the code includes the debug output trace mechanism and has
1758 a much larger code and data size.
1761 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1762 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1764 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1765 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1767 ----------------------------------------
1768 15 December 2006. Summary of changes for version 20061215:
1770 1) ACPI CA Core Subsystem:
1772 Support for 16-bit ACPICA has been completely removed since it is no longer
1773 necessary and it clutters the code. All 16-bit macros, types, and
1774 conditional compiles have been removed, cleaning up and simplifying the code
1775 across the entire subsystem. DOS support is no longer needed since the
1776 bootable Linux firmware kit is now available.
1778 The handler for the Global Lock is now removed during AcpiTerminate to
1779 enable a clean subsystem restart, via the implementation of the
1780 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
1783 Implemented enhancements to the multithreading support within the debugger
1784 to enable improved multithreading debugging and evaluation of the subsystem.
1787 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
1788 memory used during the execution, as well as the maximum memory consumed by
1789 each of the various object types. (Valery Podrezov)
1791 Example Code and Data Size: These are the sizes for the OS-independent
1792 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1793 debug version of the code includes the debug output trace mechanism and has
1794 a much larger code and data size.
1797 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1798 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1800 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1801 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1804 2) iASL Compiler/Disassembler and Tools:
1806 AcpiExec: Implemented a new option (-m) to display full memory use
1807 statistics upon subsystem/program termination. (Valery Podrezov)
1809 ----------------------------------------
1810 09 November 2006. Summary of changes for version 20061109:
1812 1) ACPI CA Core Subsystem:
1814 Optimized the Load ASL operator in the case where the source operand is an
1815 operation region. Simply map the operation region memory, instead of
1816 performing a bytewise read. (Region must be of type SystemMemory, see
1819 Fixed the Load ASL operator for the case where the source operand is a
1820 region field. A buffer object is also allowed as the source operand. BZ 480
1822 Fixed a problem where the Load ASL operator allowed the source operand to be
1823 an operation region of any type. It is now restricted to regions of type
1824 SystemMemory, as per the ACPI specification. BZ 481
1826 Additional cleanup and optimizations for the new Table Manager code.
1828 AcpiEnable will now fail if all of the required ACPI tables are not loaded
1829 (FADT, FACS, DSDT). BZ 477
1831 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
1832 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
1833 manually optimized to be aligned and will not work if it is byte-packed.
1835 Example Code and Data Size: These are the sizes for the OS-independent
1836 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1837 debug version of the code includes the debug output trace mechanism and has
1838 a much larger code and data size.
1841 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
1842 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1844 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1845 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1848 2) iASL Compiler/Disassembler and Tools:
1850 Fixed a problem where the presence of the _OSI predefined control method
1851 within complex expressions could cause an internal compiler error.
1853 AcpiExec: Implemented full region support for multiple address spaces.
1854 SpaceId is now part of the REGION object. BZ 429
1856 ----------------------------------------
1857 11 October 2006. Summary of changes for version 20061011:
1859 1) ACPI CA Core Subsystem:
1861 Completed an AML interpreter performance enhancement for control method
1862 execution. Previously a 2-pass parse/execution, control methods are now
1863 completely parsed and executed in a single pass. This improves overall
1864 interpreter performance by ~25%, reduces code size, and reduces CPU stack
1865 use. (Valery Podrezov + interpreter changes in version 20051202 that
1866 eliminated namespace loading during the pass one parse.)
1868 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
1869 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
1870 obtained and also checked for an ID match.
1872 Implemented additional support for the PCI _ADR execution: upsearch until a
1873 device scope is found before executing _ADR. This allows PCI_Config
1874 operation regions to be declared locally within control methods underneath
1877 Fixed a problem with a possible race condition between threads executing
1878 AcpiWalkNamespace and the AML interpreter. This condition was removed by
1879 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
1880 entries created during any concurrent control method execution. An
1881 additional namespace race condition is known to exist between
1882 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
1885 Restructured the AML ParseLoop function, breaking it into several
1886 subfunctions in order to reduce CPU stack use and improve maintainability.
1889 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
1890 of prefix handle and pathname. BZ 478
1892 Example Code and Data Size: These are the sizes for the OS-independent
1893 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1894 debug version of the code includes the debug output trace mechanism and has
1895 a much larger code and data size.
1898 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1899 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
1901 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
1902 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1904 2) iASL Compiler/Disassembler and Tools:
1906 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
1907 to restore original behavior.
1909 ----------------------------------------
1910 27 September 2006. Summary of changes for version 20060927:
1912 1) ACPI CA Core Subsystem:
1914 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
1915 These functions now use a spinlock for mutual exclusion and the interrupt
1916 level indication flag is not needed.
1918 Fixed a problem with the Global Lock where the lock could appear to be
1919 obtained before it is actually obtained. The global lock semaphore was
1920 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
1923 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
1924 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
1926 Example Code and Data Size: These are the sizes for the OS-independent
1927 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1928 debug version of the code includes the debug output trace mechanism and has
1929 a much larger code and data size.
1932 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1933 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
1935 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1936 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
1939 2) iASL Compiler/Disassembler and Tools:
1941 Fixed a compilation problem with the pre-defined Resource Descriptor field
1942 names where an "object does not exist" error could be incorrectly generated
1943 if the parent ResourceTemplate pathname places the template within a
1944 different namespace scope than the current scope. (BZ 7212)
1946 Fixed a problem where the compiler could hang after syntax errors detected
1947 in an ElseIf construct. (BZ 453)
1949 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
1950 operator. An incorrect output filename was produced when this parameter was
1951 a null string (""). Now, the original input filename is used as the AML
1952 output filename, with an ".aml" extension.
1954 Implemented a generic batch command mode for the AcpiExec utility (execute
1955 any AML debugger command) (Valery Podrezov).
1957 ----------------------------------------
1958 12 September 2006. Summary of changes for version 20060912:
1960 1) ACPI CA Core Subsystem:
1962 Enhanced the implementation of the "serialized mode" of the interpreter
1963 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
1964 specified, instead of creating a serialization semaphore per control method,
1965 the interpreter lock is simply no longer released before a blocking
1966 operation during control method execution. This effectively makes the AML
1967 Interpreter single-threaded. The overhead of a semaphore per-method is
1970 Fixed a regression where an error was no longer emitted if a control method
1971 attempts to create 2 objects of the same name. This once again returns
1972 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
1973 will dynamically serialize the control method to possible prevent future
1976 Integrated a fix for a problem with PCI Express HID detection in the PCI
1977 Config Space setup procedure. (BZ 7145)
1979 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
1980 AcpiHwInitialize function - the FADT registers are now validated when the
1983 Added two new warnings during FADT verification - 1) if the FADT is larger
1984 than the largest known FADT version, and 2) if there is a mismatch between a
1985 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
1987 Example Code and Data Size: These are the sizes for the OS-independent
1988 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1989 debug version of the code includes the debug output trace mechanism and has
1990 a much larger code and data size.
1993 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
1994 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
1996 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1997 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2000 2) iASL Compiler/Disassembler and Tools:
2002 Fixed a problem with the implementation of the Switch() operator where the
2003 temporary variable was declared too close to the actual Switch, instead of
2004 at method level. This could cause a problem if the Switch() operator is
2005 within a while loop, causing an error on the second iteration. (BZ 460)
2007 Disassembler - fix for error emitted for unknown type for target of scope
2008 operator. Now, ignore it and continue.
2010 Disassembly of an FADT now verifies the input FADT and reports any errors
2011 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
2013 Disassembly of raw data buffers with byte initialization data now prefixes
2014 each output line with the current buffer offset.
2016 Disassembly of ASF! table now includes all variable-length data fields at
2017 the end of some of the subtables.
2019 The disassembler now emits a comment if a buffer appears to be a
2020 ResourceTemplate, but cannot be disassembled as such because the EndTag does
2021 not appear at the very end of the buffer.
2023 AcpiExec - Added the "-t" command line option to enable the serialized mode
2024 of the AML interpreter.
2026 ----------------------------------------
2027 31 August 2006. Summary of changes for version 20060831:
2029 1) ACPI CA Core Subsystem:
2031 Miscellaneous fixes for the Table Manager:
2032 - Correctly initialize internal common FADT for all 64-bit "X" fields
2033 - Fixed a couple table mapping issues during table load
2034 - Fixed a couple alignment issues for IA64
2035 - Initialize input array to zero in AcpiInitializeTables
2036 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
2039 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
2040 immediately disabled to prevent the waking GPE from firing again and to
2041 prevent other wake GPEs from interrupting the wake process.
2043 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
2044 be used for debugging systems with a large number of ACPI interrupts.
2046 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
2047 both the ACPICA headers and the disassembler.
2049 Example Code and Data Size: These are the sizes for the OS-independent
2050 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2051 debug version of the code includes the debug output trace mechanism and has
2052 a much larger code and data size.
2055 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2056 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2058 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2059 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2062 2) iASL Compiler/Disassembler and Tools:
2064 Disassembler support for the DMAR ACPI table.
2066 ----------------------------------------
2067 23 August 2006. Summary of changes for version 20060823:
2069 1) ACPI CA Core Subsystem:
2071 The Table Manager component has been completely redesigned and
2072 reimplemented. The new design is much simpler, and reduces the overall code
2073 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
2074 now possible to obtain the ACPI tables very early during kernel
2075 initialization, even before dynamic memory management is initialized.
2076 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
2078 Obsolete ACPICA interfaces:
2080 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
2082 - AcpiLoadTable: Not needed.
2083 - AcpiUnloadTable: Not needed.
2085 New ACPICA interfaces:
2087 - AcpiInitializeTables: Must be called before the table manager can be used.
2088 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
2089 allocated memory after it becomes available.
2090 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
2093 Other ACPICA changes:
2095 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
2096 AcpiOsUnmapMemory to free this mapping.
2097 - AcpiGetTable returns the actual mapped table. The mapping is managed
2098 internally and must not be deleted by the caller. Use of this interface
2099 causes no additional dynamic memory allocation.
2100 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
2101 it appeared to be unused.
2102 - The interface to AcpiOsMapMemory has changed to be consistent with the
2103 other allocation interfaces.
2104 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
2106 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
2107 bit platforms. Was previously 64 bits on all platforms.
2108 - The interface to the ACPI Global Lock acquire/release macros have changed
2109 slightly since ACPICA no longer keeps a local copy of the FACS with a
2110 constructed pointer to the actual global lock.
2112 Porting to the new table manager:
2114 - AcpiInitializeTables: Must be called once, and can be called anytime
2115 during the OS initialization process. It allows the host to specify an area
2116 of memory to be used to store the internal version of the RSDT/XSDT (root
2117 table). This allows the host to access ACPI tables before memory management
2118 is initialized and running.
2119 - AcpiReallocateRootTable: Can be called after memory management is running
2120 to copy the root table to a dynamically allocated array, freeing up the
2121 scratch memory specified in the call to AcpiInitializeTables.
2122 - AcpiSubsystemInitialize: This existing interface is independent of the
2123 Table Manager, and does not have to be called before the Table Manager can
2124 be used, it only must be called before the rest of ACPICA can be used.
2125 - ACPI Tables: Some changes have been made to the names and structure of the
2126 actbl.h and actbl1.h header files and may require changes to existing code.
2127 For example, bitfields have been completely removed because of their lack of
2128 portability across C compilers.
2129 - Update interfaces to the Global Lock acquire/release macros if local
2130 versions are used. (see acwin.h)
2132 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
2136 Example Code and Data Size: These are the sizes for the OS-independent
2137 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2138 debug version of the code includes the debug output trace mechanism and has
2139 a much larger code and data size.
2142 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2143 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2145 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2146 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2149 2) iASL Compiler/Disassembler and Tools:
2151 No changes for this release.
2153 ----------------------------------------
2154 21 July 2006. Summary of changes for version 20060721:
2156 1) ACPI CA Core Subsystem:
2158 The full source code for the ASL test suite used to validate the iASL
2159 compiler and the ACPICA core subsystem is being released with the ACPICA
2160 source for the first time. The source is contained in a separate package and
2161 consists of over 1100 files that exercise all ASL/AML operators. The package
2162 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
2165 Completed a new design and implementation for support of the ACPI Global
2166 Lock. On the OS side, the global lock is now treated as a standard AML
2167 mutex. Previously, multiple OS threads could "acquire" the global lock
2168 simultaneously. However, this could cause the BIOS to be starved out of the
2169 lock - especially in cases such as the Embedded Controller driver where
2170 there is a tight coupling between the OS and the BIOS.
2172 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
2173 The Global Lock interrupt handler no longer queues the execution of a
2174 separate thread to signal the global lock semaphore. Instead, the semaphore
2175 is signaled directly from the interrupt handler.
2177 Implemented support within the AML interpreter for package objects that
2178 contain a larger AML length (package list length) than the package element
2179 count. In this case, the length of the package is truncated to match the
2180 package element count. Some BIOS code apparently modifies the package length
2181 on the fly, and this change supports this behavior. Provides compatibility
2182 with the MS AML interpreter. (With assistance from Fiodor Suietov)
2184 Implemented a temporary fix for the BankValue parameter of a Bank Field to
2185 support all constant values, now including the Zero and One opcodes.
2186 Evaluation of this parameter must eventually be converted to a full TermArg
2187 evaluation. A not-implemented error is now returned (temporarily) for non-
2188 constant values for this parameter.
2190 Fixed problem reports (Fiodor Suietov) integrated:
2191 - Fix for premature object deletion after CopyObject on Operation Region (BZ
2194 Example Code and Data Size: These are the sizes for the OS-independent
2195 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2196 debug version of the code includes the debug output trace mechanism and has
2197 a much larger code and data size.
2200 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
2201 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
2203 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2204 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2207 2) iASL Compiler/Disassembler and Tools:
2209 No changes for this release.
2211 ----------------------------------------
2212 07 July 2006. Summary of changes for version 20060707:
2214 1) ACPI CA Core Subsystem:
2216 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
2217 that do not allow the initialization of address pointers within packed
2218 structures - even though the hardware itself may support misaligned
2219 transfers. Some of the debug data structures are packed by default to
2222 Added an error message for the case where AcpiOsGetThreadId() returns zero.
2223 A non-zero value is required by the core ACPICA code to ensure the proper
2224 operation of AML mutexes and recursive control methods.
2226 The DSDT is now the only ACPI table that determines whether the AML
2227 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
2228 the hooks for per-table 32/64 switching have been removed from the code. A
2229 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
2231 Fixed a possible leak of an OwnerID in the error path of
2232 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
2233 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
2234 when using the AcpiTbDeleteTablesByType interface (with assistance from
2237 Fixed a problem with Serialized control methods where the semaphore
2238 associated with the method could be over-signaled after multiple method
2241 Fixed two issues with the locking of the internal namespace data structure.
2242 Both the Unload() operator and AcpiUnloadTable interface now lock the
2243 namespace during the namespace deletion associated with the table unload
2244 (with assistance from Linn Crosetto.)
2246 Fixed problem reports (Valery Podrezov) integrated:
2247 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
2249 Fixed problem reports (Fiodor Suietov) integrated:
2250 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
2251 - On Address Space handler deletion, needless deactivation call (BZ 374)
2252 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
2253 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
2255 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
2256 - Minimum Length of RSDT should be validated (BZ 379)
2257 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
2259 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
2262 Example Code and Data Size: These are the sizes for the OS-independent
2263 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2264 debug version of the code includes the debug output trace mechanism and has
2265 a much larger code and data size.
2268 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2269 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2271 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2272 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2275 2) iASL Compiler/Disassembler and Tools:
2277 Fixed problem reports:
2278 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2281 ----------------------------------------
2282 23 June 2006. Summary of changes for version 20060623:
2284 1) ACPI CA Core Subsystem:
2286 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
2287 allows the type to be customized to the host OS for improved efficiency
2288 (since a spinlock is usually a very small object.)
2290 Implemented support for "ignored" bits in the ACPI registers. According to
2291 the ACPI specification, these bits should be preserved when writing the
2292 registers via a read/modify/write cycle. There are 3 bits preserved in this
2293 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
2295 Implemented the initial deployment of new OSL mutex interfaces. Since some
2296 host operating systems have separate mutex and semaphore objects, this
2297 feature was requested. The base code now uses mutexes (and the new mutex
2298 interfaces) wherever a binary semaphore was used previously. However, for
2299 the current release, the mutex interfaces are defined as macros to map them
2300 to the existing semaphore interfaces. Therefore, no OSL changes are required
2301 at this time. (See acpiosxf.h)
2303 Fixed several problems with the support for the control method SyncLevel
2304 parameter. The SyncLevel now works according to the ACPI specification and
2305 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
2306 is a property of the executing thread. Mutual exclusion for control methods
2307 is now implemented with a mutex instead of a semaphore.
2309 Fixed three instances of the use of the C shift operator in the bitfield
2310 support code (exfldio.c) to avoid the use of a shift value larger than the
2311 target data width. The behavior of C compilers is undefined in this case and
2312 can cause unpredictable results, and therefore the case must be detected and
2313 avoided. (Fiodor Suietov)
2315 Added an info message whenever an SSDT or OEM table is loaded dynamically
2316 via the Load() or LoadTable() ASL operators. This should improve debugging
2317 capability since it will show exactly what tables have been loaded (beyond
2318 the tables present in the RSDT/XSDT.)
2320 Example Code and Data Size: These are the sizes for the OS-independent
2321 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2322 debug version of the code includes the debug output trace mechanism and has
2323 a much larger code and data size.
2326 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2327 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2329 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2330 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2333 2) iASL Compiler/Disassembler and Tools:
2335 No changes for this release.
2337 ----------------------------------------
2338 08 June 2006. Summary of changes for version 20060608:
2340 1) ACPI CA Core Subsystem:
2342 Converted the locking mutex used for the ACPI hardware to a spinlock. This
2343 change should eliminate all problems caused by attempting to acquire a
2344 semaphore at interrupt level, and it means that all ACPICA external
2345 interfaces that directly access the ACPI hardware can be safely called from
2346 interrupt level. OSL code that implements the semaphore interfaces should be
2347 able to eliminate any workarounds for being called at interrupt level.
2349 Fixed a regression introduced in 20060526 where the ACPI device
2350 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
2351 did not have an optional _INI method.
2353 Fixed an IndexField issue where a write to the Data Register should be
2354 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
2357 Fixed problem reports (Valery Podrezov) integrated:
2358 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
2360 Fixed problem reports (Fiodor Suietov) integrated:
2361 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
2363 Removed four global mutexes that were obsolete and were no longer being
2366 Example Code and Data Size: These are the sizes for the OS-independent
2367 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2368 debug version of the code includes the debug output trace mechanism and has
2369 a much larger code and data size.
2372 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2373 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2375 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2376 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2379 2) iASL Compiler/Disassembler and Tools:
2381 Fixed a fault when using -g option (get tables from registry) on Windows
2384 Fixed problem reports integrated:
2385 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
2386 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
2388 - Global table revision override (-r) is ignored (BZ 413)
2390 ----------------------------------------
2391 26 May 2006. Summary of changes for version 20060526:
2393 1) ACPI CA Core Subsystem:
2395 Restructured, flattened, and simplified the internal interfaces for
2396 namespace object evaluation - resulting in smaller code, less CPU stack use,
2397 and fewer interfaces. (With assistance from Mikhail Kouzmich)
2399 Fixed a problem with the CopyObject operator where the first parameter was
2400 not typed correctly for the parser, interpreter, compiler, and disassembler.
2401 Caused various errors and unexpected behavior.
2403 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
2404 produced incorrect results with some C compilers. Since the behavior of C
2405 compilers when the shift value is larger than the datatype width is
2406 apparently not well defined, the interpreter now detects this condition and
2407 simply returns zero as expected in all such cases. (BZ 395)
2409 Fixed problem reports (Valery Podrezov) integrated:
2410 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
2411 - Allow interpreter to handle nested method declarations (BZ 5361)
2413 Fixed problem reports (Fiodor Suietov) integrated:
2414 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
2415 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
2416 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
2417 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
2418 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
2419 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
2420 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
2421 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
2422 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
2423 - Status of the Global Initialization Handler call not used (BZ 366)
2424 - Incorrect object parameter to Global Initialization Handler (BZ 367)
2426 Example Code and Data Size: These are the sizes for the OS-independent
2427 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2428 debug version of the code includes the debug output trace mechanism and has
2429 a much larger code and data size.
2432 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2433 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2435 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2436 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2439 2) iASL Compiler/Disassembler and Tools:
2441 Modified the parser to allow the names IO, DMA, and IRQ to be used as
2442 namespace identifiers with no collision with existing resource descriptor
2443 macro names. This provides compatibility with other ASL compilers and is
2444 most useful for disassembly/recompilation of existing tables without parse
2445 errors. (With assistance from Thomas Renninger)
2447 Disassembler: fixed an incorrect disassembly problem with the
2448 DataTableRegion and CopyObject operators. Fixed a possible fault during
2449 disassembly of some Alias operators.
2451 ----------------------------------------
2452 12 May 2006. Summary of changes for version 20060512:
2454 1) ACPI CA Core Subsystem:
2456 Replaced the AcpiOsQueueForExecution interface with a new interface named
2457 AcpiOsExecute. The major difference is that the new interface does not have
2458 a Priority parameter, this appeared to be useless and has been replaced by a
2459 Type parameter. The Type tells the host what type of execution is being
2460 requested, such as global lock handler, notify handler, GPE handler, etc.
2461 This allows the host to queue and execute the request as appropriate for the
2462 request type, possibly using different work queues and different priorities
2463 for the various request types. This enables fixes for multithreading
2464 deadlock problems such as BZ #5534, and will require changes to all existing
2465 OS interface layers. (Alexey Starikovskiy and Bob Moore)
2467 Fixed a possible memory leak associated with the support for the so-called
2468 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
2471 Fixed a problem with the Load() operator where a table load from an
2472 operation region could overwrite an internal table buffer by up to 7 bytes
2473 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
2475 Example Code and Data Size: These are the sizes for the OS-independent
2476 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2477 debug version of the code includes the debug output trace mechanism and has
2478 a much larger code and data size.
2481 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2482 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2484 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2485 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2489 2) iASL Compiler/Disassembler and Tools:
2491 Disassembler: Implemented support to cross reference the internal namespace
2492 and automatically generate ASL External() statements for symbols not defined
2493 within the current table being disassembled. This will simplify the
2494 disassembly and recompilation of interdependent tables such as SSDTs since
2495 these statements will no longer have to be added manually.
2497 Disassembler: Implemented experimental support to automatically detect
2498 invocations of external control methods and generate appropriate External()
2499 statements. This is problematic because the AML cannot be correctly parsed
2500 until the number of arguments for each control method is known. Currently,
2501 standalone method invocations and invocations as the source operand of a
2502 Store() statement are supported.
2504 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
2505 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
2506 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
2507 more readable and likely closer to the original ASL source.
2509 ----------------------------------------
2510 21 April 2006. Summary of changes for version 20060421:
2512 1) ACPI CA Core Subsystem:
2514 Removed a device initialization optimization introduced in 20051216 where
2515 the _STA method was not run unless an _INI was also present for the same
2516 device. This optimization could cause problems because it could allow _INI
2517 methods to be run within a not-present device subtree. (If a not-present
2518 device had no _INI, _STA would not be run, the not-present status would not
2519 be discovered, and the children of the device would be incorrectly
2522 Implemented a new _STA optimization where namespace subtrees that do not
2523 contain _INI are identified and ignored during device initialization.
2524 Selectively running _STA can significantly improve boot time on large
2525 machines (with assistance from Len Brown.)
2527 Implemented support for the device initialization case where the returned
2528 _STA flags indicate a device not-present but functioning. In this case, _INI
2529 is not run, but the device children are examined for presence, as per the
2532 Implemented an additional change to the IndexField support in order to
2533 conform to MS behavior. The value written to the Index Register is not
2534 simply a byte offset, it is a byte offset in units of the access width of
2535 the parent Index Field. (Fiodor Suietov)
2537 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
2538 interface is called during the creation of all AML operation regions, and
2539 allows the host OS to exert control over what addresses it will allow the
2540 AML code to access. Operation Regions whose addresses are disallowed will
2541 cause a runtime exception when they are actually accessed (will not affect
2542 or abort table loading.) See oswinxf or osunixxf for an example
2545 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
2546 interface allows the host OS to match the various "optional"
2547 interface/behavior strings for the _OSI predefined control method as
2548 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
2549 for an example implementation.
2551 Restructured and corrected various problems in the exception handling code
2552 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
2553 (with assistance from Takayoshi Kochi.)
2555 Modified the Linux source converter to ignore quoted string literals while
2556 converting identifiers from mixed to lower case. This will correct problems
2557 with the disassembler and other areas where such strings must not be
2560 The ACPI_FUNCTION_* macros no longer require quotes around the function
2561 name. This allows the Linux source converter to convert the names, now that
2562 the converter ignores quoted strings.
2564 Example Code and Data Size: These are the sizes for the OS-independent
2565 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2566 debug version of the code includes the debug output trace mechanism and has
2567 a much larger code and data size.
2571 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2572 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2574 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2575 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2578 2) iASL Compiler/Disassembler and Tools:
2580 Implemented 3 new warnings for iASL, and implemented multiple warning levels
2583 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
2584 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
2585 check for the possible timeout, a warning is issued.
2587 2) Useless operators: If an ASL operator does not specify an optional target
2588 operand and it also does not use the function return value from the
2589 operator, a warning is issued since the operator effectively does nothing.
2591 3) Unreferenced objects: If a namespace object is created, but never
2592 referenced, a warning is issued. This is a warning level 2 since there are
2593 cases where this is ok, such as when a secondary table is loaded that uses
2594 the unreferenced objects. Even so, care is taken to only flag objects that
2595 don't look like they will ever be used. For example, the reserved methods
2596 (starting with an underscore) are usually not referenced because it is
2597 expected that the OS will invoke them.
2599 ----------------------------------------
2600 31 March 2006. Summary of changes for version 20060331:
2602 1) ACPI CA Core Subsystem:
2604 Implemented header file support for the following additional ACPI tables:
2605 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
2606 all current and known ACPI tables are now defined in the ACPICA headers and
2607 are available for use by device drivers and other software.
2609 Implemented support to allow tables that contain ACPI names with invalid
2610 characters to be loaded. Previously, this would cause the table load to
2611 fail, but since there are several known cases of such tables on existing
2612 machines, this change was made to enable ACPI support for them. Also, this
2613 matches the behavior of the Microsoft ACPI implementation.
2615 Fixed a couple regressions introduced during the memory optimization in the
2616 20060317 release. The namespace node definition required additional
2617 reorganization and an internal datatype that had been changed to 8-bit was
2618 restored to 32-bit. (Valery Podrezov)
2620 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
2621 could be passed through to AcpiOsReleaseObject which is unexpected. Such
2622 null pointers are now trapped and ignored, matching the behavior of the
2623 previous implementation before the deployment of AcpiOsReleaseObject.
2624 (Valery Podrezov, Fiodor Suietov)
2626 Fixed a memory mapping leak during the deletion of a SystemMemory operation
2627 region where a cached memory mapping was not deleted. This became a
2628 noticeable problem for operation regions that are defined within frequently
2629 used control methods. (Dana Meyers)
2631 Reorganized the ACPI table header files into two main files: one for the
2632 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
2633 ACPI tables that are consumed by the drivers and other software. The various
2634 FADT definitions were merged into one common section and three different
2635 tables (ACPI 1.0, 1.0+, and 2.0)
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.
2643 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2644 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2646 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2647 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2650 2) iASL Compiler/Disassembler and Tools:
2652 Disassembler: Implemented support to decode and format all non-AML ACPI
2653 tables (tables other than DSDTs and SSDTs.) This includes the new tables
2654 added to the ACPICA headers, therefore all current and known ACPI tables are
2657 Disassembler: The change to allow ACPI names with invalid characters also
2658 enables the disassembly of such tables. Invalid characters within names are
2659 changed to '*' to make the name printable; the iASL compiler will still
2660 generate an error for such names, however, since this is an invalid ACPI
2663 Implemented an option for AcpiXtract (-a) to extract all tables found in the
2664 input file. The default invocation extracts only the DSDTs and SSDTs.
2666 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
2667 makefile for the AcpiXtract utility.
2669 ----------------------------------------
2670 17 March 2006. Summary of changes for version 20060317:
2672 1) ACPI CA Core Subsystem:
2674 Implemented the use of a cache object for all internal namespace nodes.
2675 Since there are about 1000 static nodes in a typical system, this will
2676 decrease memory use for cache implementations that minimize per-allocation
2677 overhead (such as a slab allocator.)
2679 Removed the reference count mechanism for internal namespace nodes, since it
2680 was deemed unnecessary. This reduces the size of each namespace node by
2681 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
2682 and 32 bytes for the 64-bit case.
2684 Optimized several internal data structures to reduce object size on 64-bit
2685 platforms by packing data within the 64-bit alignment. This includes the
2686 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
2687 instances corresponding to the namespace objects.
2689 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
2692 Split the allocation tracking mechanism out to a separate file, from
2693 utalloc.c to uttrack.c. This mechanism appears to be only useful for
2694 application-level code. Kernels may wish to not include uttrack.c in
2697 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
2698 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
2701 Code and Data Size: These are the sizes for the acpica.lib produced by the
2702 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2703 driver or OSPM code. The debug version of the code includes the debug output
2704 trace mechanism and has a much larger code and data size. Note that these
2705 values will vary depending on the efficiency of the compiler and the
2706 compiler options used during generation.
2709 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2710 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2712 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2713 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2716 2) iASL Compiler/Disassembler and Tools:
2718 Implemented an ANSI C version of the acpixtract utility. This version will
2719 automatically extract the DSDT and all SSDTs from the input acpidump text
2720 file and dump the binary output to separate files. It can also display a
2721 summary of the input file including the headers for each table found and
2722 will extract any single ACPI table, with any signature. (See
2723 source/tools/acpixtract)
2725 ----------------------------------------
2726 10 March 2006. Summary of changes for version 20060310:
2728 1) ACPI CA Core Subsystem:
2730 Tagged all external interfaces to the subsystem with the new
2731 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
2732 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
2733 macro. The default definition is NULL.
2735 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
2736 This allows the host to define this as necessary to simplify kernel
2737 integration. The default definition is ACPI_NATIVE_UINT.
2739 Fixed two interpreter problems related to error processing, the deletion of
2740 objects, and placing invalid pointers onto the internal operator result
2741 stack. BZ 6028, 6151 (Valery Podrezov)
2743 Increased the reference count threshold where a warning is emitted for large
2744 reference counts in order to eliminate unnecessary warnings on systems with
2745 large namespaces (especially 64-bit.) Increased the value from 0x400 to
2748 Due to universal disagreement as to the meaning of the 'c' in the calloc()
2749 function, the ACPI_MEM_CALLOCATE macro has been renamed to
2750 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
2751 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
2754 Code and Data Size: These are the sizes for the acpica.lib produced by the
2755 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2756 driver or OSPM code. The debug version of the code includes the debug output
2757 trace mechanism and has a much larger code and data size. Note that these
2758 values will vary depending on the efficiency of the compiler and the
2759 compiler options used during generation.
2762 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2763 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2765 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2766 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2769 2) iASL Compiler/Disassembler:
2771 Disassembler: implemented support for symbolic resource descriptor
2772 references. If a CreateXxxxField operator references a fixed offset within a
2773 resource descriptor, a name is assigned to the descriptor and the offset is
2774 translated to the appropriate resource tag and pathname. The addition of
2775 this support brings the disassembled code very close to the original ASL
2776 source code and helps eliminate run-time errors when the disassembled code
2777 is modified (and recompiled) in such a way as to invalidate the original
2780 Implemented support for a Descriptor Name as the last parameter to the ASL
2781 Register() macro. This parameter was inadvertently left out of the ACPI
2782 specification, and will be added for ACPI 3.0b.
2784 Fixed a problem where the use of the "_OSI" string (versus the full path
2785 "\_OSI") caused an internal compiler error. ("No back ptr to op")
2787 Fixed a problem with the error message that occurs when an invalid string is
2788 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
2789 The correct message is now displayed.
2791 ----------------------------------------
2792 17 February 2006. Summary of changes for version 20060217:
2794 1) ACPI CA Core Subsystem:
2796 Implemented a change to the IndexField support to match the behavior of the
2797 Microsoft AML interpreter. The value written to the Index register is now a
2798 byte offset, no longer an index based upon the width of the Data register.
2799 This should fix IndexField problems seen on some machines where the Data
2800 register is not exactly one byte wide. The ACPI specification will be
2801 clarified on this point.
2803 Fixed a problem where several resource descriptor types could overrun the
2804 internal descriptor buffer due to size miscalculation: VendorShort,
2805 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
2806 affect all platforms.
2808 Fixed a problem where individual resource descriptors were misaligned within
2809 the internal buffer, causing alignment faults on IA64 platforms.
2811 Code and Data Size: These are the sizes for the acpica.lib produced by the
2812 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2813 driver or OSPM code. The debug version of the code includes the debug output
2814 trace mechanism and has a much larger code and data size. Note that these
2815 values will vary depending on the efficiency of the compiler and the
2816 compiler options used during generation.
2819 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2820 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2822 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2823 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2826 2) iASL Compiler/Disassembler:
2828 Implemented support for new reserved names: _WDG and _WED are Microsoft
2829 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
2830 defined method (Throttling Depth Limit.)
2832 Fixed a problem where a zero-length VendorShort or VendorLong resource
2833 descriptor was incorrectly emitted as a descriptor of length one.
2835 ----------------------------------------
2836 10 February 2006. Summary of changes for version 20060210:
2838 1) ACPI CA Core Subsystem:
2840 Removed a couple of extraneous ACPI_ERROR messages that appeared during
2841 normal execution. These became apparent after the conversion from
2844 Fixed a problem where the CreateField operator could hang if the BitIndex or
2845 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
2847 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
2848 failed with an exception. This also fixes a couple of related RefOf and
2849 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
2851 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
2852 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
2855 Implemented a memory cleanup at the end of the execution of each iteration
2856 of an AML While() loop, preventing the accumulation of outstanding objects.
2857 (Valery Podrezov, BZ 5427)
2859 Eliminated a chunk of duplicate code in the object resolution code. (Valery
2862 Fixed several warnings during the 64-bit code generation.
2864 The AcpiSrc source code conversion tool now inserts one line of whitespace
2865 after an if() statement that is followed immediately by a comment, improving
2866 readability of the Linux code.
2868 Code and Data Size: The current and previous library sizes for the core
2869 subsystem are shown below. These are the code and data sizes for the
2870 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2871 values do not include any ACPI driver or OSPM code. The debug version of the
2872 code includes the debug output trace mechanism and has a much larger code
2873 and data size. Note that these values will vary depending on the efficiency
2874 of the compiler and the compiler options used during generation.
2877 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
2878 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
2880 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2881 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2884 2) iASL Compiler/Disassembler:
2886 Fixed a problem with the disassembly of a BankField operator with a complex
2887 expression for the BankValue parameter.
2889 ----------------------------------------
2890 27 January 2006. Summary of changes for version 20060127:
2892 1) ACPI CA Core Subsystem:
2894 Implemented support in the Resource Manager to allow unresolved namestring
2895 references within resource package objects for the _PRT method. This support
2896 is in addition to the previously implemented unresolved reference support
2897 within the AML parser. If the interpreter slack mode is enabled, these
2898 unresolved references will be passed through to the caller as a NULL package
2901 Implemented and deployed new macros and functions for error and warning
2902 messages across the subsystem. These macros are simpler and generate less
2903 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
2904 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
2905 macros remain defined to allow ACPI drivers time to migrate to the new
2908 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
2909 Acquire/Release Lock OSL interfaces.
2911 Fixed a problem where Alias ASL operators are sometimes not correctly
2912 resolved, in both the interpreter and the iASL compiler.
2914 Fixed several problems with the implementation of the ConcatenateResTemplate
2915 ASL operator. As per the ACPI specification, zero length buffers are now
2916 treated as a single EndTag. One-length buffers always cause a fatal
2917 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
2918 cause a fatal exception.
2920 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
2921 interface. (With assistance from Thomas Renninger)
2923 Code and Data Size: The current and previous library sizes for the core
2924 subsystem are shown below. These are the code and data sizes for the
2925 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2926 values do not include any ACPI driver or OSPM code. The debug version of the
2927 code includes the debug output trace mechanism and has a much larger code
2928 and data size. Note that these values will vary depending on the efficiency
2929 of the compiler and the compiler options used during generation.
2932 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
2933 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
2935 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
2936 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
2939 2) iASL Compiler/Disassembler:
2941 Fixed an internal error that was generated for any forward references to ASL
2944 ----------------------------------------
2945 13 January 2006. Summary of changes for version 20060113:
2947 1) ACPI CA Core Subsystem:
2949 Added 2006 copyright to all module headers and signons. This affects
2950 virtually every file in the ACPICA core subsystem, iASL compiler, and the
2953 Enhanced the ACPICA error reporting in order to simplify user migration to
2954 the non-debug version of ACPICA. Replaced all instances of the
2955 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
2956 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
2957 respectively. This preserves all error and warning messages in the non-debug
2958 version of the ACPICA code (this has been referred to as the "debug lite"
2959 option.) Over 200 cases were converted to create a total of over 380
2960 error/warning messages across the ACPICA code. This increases the code and
2961 data size of the default non-debug version of the code somewhat (about 13K),
2962 but all error/warning reporting may be disabled if desired (and code
2963 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
2964 configuration option. The size of the debug version of ACPICA remains about
2967 Fixed a memory leak within the AML Debugger "Set" command. One object was
2968 not properly deleted for every successful invocation of the command.
2970 Code and Data Size: The current and previous library sizes for the core
2971 subsystem are shown below. These are the code and data sizes for the
2972 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2973 values do not include any ACPI driver or OSPM code. The debug version of the
2974 code includes the debug output trace mechanism and has a much larger code
2975 and data size. Note that these values will vary depending on the efficiency
2976 of the compiler and the compiler options used during generation.
2979 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
2980 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
2982 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
2983 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
2986 2) iASL Compiler/Disassembler:
2988 The compiler now officially supports the ACPI 3.0a specification that was
2989 released on December 30, 2005. (Specification is available at www.acpi.info)
2991 ----------------------------------------
2992 16 December 2005. Summary of changes for version 20051216:
2994 1) ACPI CA Core Subsystem:
2996 Implemented optional support to allow unresolved names within ASL Package
2997 objects. A null object is inserted in the package when a named reference
2998 cannot be located in the current namespace. Enabled via the interpreter
2999 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
3000 that contain such code.
3002 Implemented an optimization to the initialization sequence that can improve
3003 boot time. During ACPI device initialization, the _STA method is now run if
3004 and only if the _INI method exists. The _STA method is used to determine if
3005 the device is present; An _INI can only be run if _STA returns present, but
3006 it is a waste of time to run the _STA method if the _INI does not exist.
3007 (Prototype and assistance from Dong Wei)
3009 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
3010 available in the current compiler. Otherwise, the default (void *) cast is
3013 Fixed some possible memory leaks found within the execution path of the
3014 Break, Continue, If, and CreateField operators. (Valery Podrezov)
3016 Fixed a problem introduced in the 20051202 release where an exception is
3017 generated during method execution if a control method attempts to declare
3020 Moved resource descriptor string constants that are used by both the AML
3021 disassembler and AML debugger to the common utilities directory so that
3022 these components are independent.
3024 Implemented support in the AcpiExec utility (-e switch) to globally ignore
3025 exceptions during control method execution (method is not aborted.)
3027 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
3030 Code and Data Size: The current and previous library sizes for the core
3031 subsystem are shown below. These are the code and data sizes for the
3032 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3033 values do not include any ACPI driver or OSPM code. The debug version of the
3034 code includes the debug output trace mechanism and has a much larger code
3035 and data size. Note that these values will vary depending on the efficiency
3036 of the compiler and the compiler options used during generation.
3039 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3040 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3042 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3043 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3046 2) iASL Compiler/Disassembler:
3048 Fixed a problem where a CPU stack overflow fault could occur if a recursive
3049 method call was made from within a Return statement.
3051 ----------------------------------------
3052 02 December 2005. Summary of changes for version 20051202:
3054 1) ACPI CA Core Subsystem:
3056 Modified the parsing of control methods to no longer create namespace
3057 objects during the first pass of the parse. Objects are now created only
3058 during the execute phase, at the moment the namespace creation operator is
3059 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
3060 should eliminate ALREADY_EXISTS exceptions seen on some machines where
3061 reentrant control methods are protected by an AML mutex. The mutex will now
3062 correctly block multiple threads from attempting to create the same object
3065 Increased the number of available Owner Ids for namespace object tracking
3066 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
3067 some machines with a large number of ACPI tables (either static or dynamic).
3069 Fixed a problem with the AcpiExec utility where a fault could occur when the
3070 -b switch (batch mode) is used.
3072 Enhanced the namespace dump routine to output the owner ID for each
3075 Code and Data Size: The current and previous library sizes for the core
3076 subsystem are shown below. These are the code and data sizes for the
3077 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3078 values do not include any ACPI driver or OSPM code. The debug version of the
3079 code includes the debug output trace mechanism and has a much larger code
3080 and data size. Note that these values will vary depending on the efficiency
3081 of the compiler and the compiler options used during generation.
3084 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3085 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3087 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3088 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3091 2) iASL Compiler/Disassembler:
3093 Fixed a parse error during compilation of certain Switch/Case constructs. To
3094 simplify the parse, the grammar now allows for multiple Default statements
3095 and this error is now detected and flagged during the analysis phase.
3097 Disassembler: The disassembly now includes the contents of the original
3098 table header within a comment at the start of the file. This includes the
3099 name and version of the original ASL compiler.
3101 ----------------------------------------
3102 17 November 2005. Summary of changes for version 20051117:
3104 1) ACPI CA Core Subsystem:
3106 Fixed a problem in the AML parser where the method thread count could be
3107 decremented below zero if any errors occurred during the method parse phase.
3108 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
3109 This also fixed a related regression with the mechanism that detects and
3110 corrects methods that cannot properly handle reentrancy (related to the
3111 deployment of the new OwnerId mechanism.)
3113 Eliminated the pre-parsing of control methods (to detect errors) during
3114 table load. Related to the problem above, this was causing unwind issues if
3115 any errors occurred during the parse, and it seemed to be overkill. A table
3116 load should not be aborted if there are problems with any single control
3117 method, thus rendering this feature rather pointless.
3119 Fixed a problem with the new table-driven resource manager where an internal
3120 buffer overflow could occur for small resource templates.
3122 Implemented a new external interface, AcpiGetVendorResource. This interface
3123 will find and return a vendor-defined resource descriptor within a _CRS or
3124 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
3126 Removed the length limit (200) on string objects as per the upcoming ACPI
3127 3.0A specification. This affects the following areas of the interpreter: 1)
3128 any implicit conversion of a Buffer to a String, 2) a String object result
3129 of the ASL Concatentate operator, 3) the String object result of the ASL
3132 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
3133 on a semaphore object would incorrectly timeout. This allows the
3134 multithreading features of the AcpiExec utility to work properly under
3137 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
3138 the recently added file named "utresrc.c".
3140 Code and Data Size: The current and previous library sizes for the core
3141 subsystem are shown below. These are the code and data sizes for the
3142 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3143 values do not include any ACPI driver or OSPM code. The debug version of the
3144 code includes the debug output trace mechanism and has a much larger code
3145 and data size. Note that these values will vary depending on the efficiency
3146 of the compiler and the compiler options used during generation.
3149 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3150 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3152 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3153 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3156 2) iASL Compiler/Disassembler:
3158 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
3159 specification. For the iASL compiler, this means that string literals within
3160 the source ASL can be of any length.
3162 Enhanced the listing output to dump the AML code for resource descriptors
3163 immediately after the ASL code for each descriptor, instead of in a block at
3164 the end of the entire resource template.
3166 Enhanced the compiler debug output to dump the entire original parse tree
3167 constructed during the parse phase, before any transforms are applied to the
3168 tree. The transformed tree is dumped also.
3170 ----------------------------------------
3171 02 November 2005. Summary of changes for version 20051102:
3173 1) ACPI CA Core Subsystem:
3175 Modified the subsystem initialization sequence to improve GPE support. The
3176 GPE initialization has been split into two parts in order to defer execution
3177 of the _PRW methods (Power Resources for Wake) until after the hardware is
3178 fully initialized and the SCI handler is installed. This allows the _PRW
3179 methods to access fields protected by the Global Lock. This will fix systems
3180 where a NO_GLOBAL_LOCK exception has been seen during initialization.
3182 Converted the ACPI internal object disassemble and display code within the
3183 AML debugger to fully table-driven operation, reducing code size and
3184 increasing maintainability.
3186 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
3187 in the 20051021 release.
3189 Implemented support for "local" internal ACPI object types within the
3190 debugger "Object" command and the AcpiWalkNamespace external interfaces.
3191 These local types include RegionFields, BankFields, IndexFields, Alias, and
3194 Moved common AML resource handling code into a new file, "utresrc.c". This
3195 code is shared by both the Resource Manager and the AML Debugger.
3197 Code and Data Size: The current and previous library sizes for the core
3198 subsystem are shown below. These are the code and data sizes for the
3199 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3200 values do not include any ACPI driver or OSPM code. The debug version of the
3201 code includes the debug output trace mechanism and has a much larger code
3202 and data size. Note that these values will vary depending on the efficiency
3203 of the compiler and the compiler options used during generation.
3206 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3207 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3209 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3210 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3213 2) iASL Compiler/Disassembler:
3215 Fixed a problem with very large initializer lists (more than 4000 elements)
3216 for both Buffer and Package objects where the parse stack could overflow.
3218 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
3219 characters within comment fields. The scan is now always performed and is no
3220 longer optional, detecting invalid characters within a source file
3221 immediately rather than during the parse phase or later.
3223 Enhanced the ASL grammar definition to force early reductions on all list-
3224 style grammar elements so that the overall parse stack usage is greatly
3225 reduced. This should improve performance and reduce the possibility of parse
3228 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
3229 with the addition of a %expected statement, the compiler generates from
3230 source with no warnings.
3232 Fixed a possible segment fault in the disassembler if the input filename
3233 does not contain a "dot" extension (Thomas Renninger).
3235 ----------------------------------------
3236 21 October 2005. Summary of changes for version 20051021:
3238 1) ACPI CA Core Subsystem:
3240 Implemented support for the EM64T and other x86-64 processors. This
3241 essentially entails recognizing that these processors support non-aligned
3242 memory transfers. Previously, all 64-bit processors were assumed to lack
3243 hardware support for non-aligned transfers.
3245 Completed conversion of the Resource Manager to nearly full table-driven
3246 operation. Specifically, the resource conversion code (convert AML to
3247 internal format and the reverse) and the debug code to dump internal
3248 resource descriptors are fully table-driven, reducing code and data size and
3249 improving maintainability.
3251 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
3252 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
3253 Alexey Starikovskiy)
3255 Implemented support within the resource conversion code for the Type-
3256 Specific byte within the various ACPI 3.0 *WordSpace macros.
3258 Fixed some issues within the resource conversion code for the type-specific
3259 flags for both Memory and I/O address resource descriptors. For Memory,
3260 implemented support for the MTP and TTP flags. For I/O, split the TRS and
3261 TTP flags into two separate fields.
3263 Code and Data Size: The current and previous library sizes for the core
3264 subsystem are shown below. These are the code and data sizes for the
3265 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3266 values do not include any ACPI driver or OSPM code. The debug version of the
3267 code includes the debug output trace mechanism and has a much larger code
3268 and data size. Note that these values will vary depending on the efficiency
3269 of the compiler and the compiler options used during generation.
3272 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3273 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3275 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3276 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3280 2) iASL Compiler/Disassembler:
3282 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
3283 corresponding ResourceSource string was not also present in a resource
3284 descriptor declaration. This restriction caused problems with existing
3285 AML/ASL code that includes the Index byte without the string. When such AML
3286 was disassembled, it could not be compiled without modification. Further,
3287 the modified code created a resource template with a different size than the
3288 original, breaking code that used fixed offsets into the resource template
3291 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
3292 byte. This byte is now emitted if present so that the exact AML can be
3293 reproduced when the disassembled code is recompiled.
3295 Improved comments and text alignment for the resource descriptor code
3296 emitted by the disassembler.
3298 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
3299 Register() resource descriptor.
3301 ----------------------------------------
3302 30 September 2005. Summary of changes for version 20050930:
3304 1) ACPI CA Core Subsystem:
3306 Completed a major overhaul of the Resource Manager code - specifically,
3307 optimizations in the area of the AML/internal resource conversion code. The
3308 code has been optimized to simplify and eliminate duplicated code, CPU stack
3309 use has been decreased by optimizing function parameters and local
3310 variables, and naming conventions across the manager have been standardized
3311 for clarity and ease of maintenance (this includes function, parameter,
3312 variable, and struct/typedef names.) The update may force changes in some
3313 driver code, depending on how resources are handled by the host OS.
3315 All Resource Manager dispatch and information tables have been moved to a
3316 single location for clarity and ease of maintenance. One new file was
3317 created, named "rsinfo.c".
3319 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
3320 guarantee that the argument is not evaluated twice, making them less prone
3321 to macro side-effects. However, since there exists the possibility of
3322 additional stack use if a particular compiler cannot optimize them (such as
3323 in the debug generation case), the original macros are optionally available.
3324 Note that some invocations of the return_VALUE macro may now cause size
3325 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
3326 eliminate these. (From Randy Dunlap)
3328 Implemented a new mechanism to enable debug tracing for individual control
3329 methods. A new external interface, AcpiDebugTrace, is provided to enable
3330 this mechanism. The intent is to allow the host OS to easily enable and
3331 disable tracing for problematic control methods. This interface can be
3332 easily exposed to a user or debugger interface if desired. See the file
3333 psxface.c for details.
3335 AcpiUtCallocate will now return a valid pointer if a length of zero is
3336 specified - a length of one is used and a warning is issued. This matches
3337 the behavior of AcpiUtAllocate.
3339 Code and Data Size: The current and previous library sizes for the core
3340 subsystem are shown below. These are the code and data sizes for the
3341 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3342 values do not include any ACPI driver or OSPM code. The debug version of the
3343 code includes the debug output trace mechanism and has a much larger code
3344 and data size. Note that these values will vary depending on the efficiency
3345 of the compiler and the compiler options used during generation.
3348 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3349 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3351 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3352 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3355 2) iASL Compiler/Disassembler:
3357 A remark is issued if the effective compile-time length of a package or
3358 buffer is zero. Previously, this was a warning.
3360 ----------------------------------------
3361 16 September 2005. Summary of changes for version 20050916:
3363 1) ACPI CA Core Subsystem:
3365 Fixed a problem within the Resource Manager where support for the Generic
3366 Register descriptor was not fully implemented. This descriptor is now fully
3367 recognized, parsed, disassembled, and displayed.
3369 Completely restructured the Resource Manager code to utilize table-driven
3370 dispatch and lookup, eliminating many of the large switch() statements. This
3371 reduces overall subsystem code size and code complexity. Affects the
3372 resource parsing and construction, disassembly, and debug dump output.
3374 Cleaned up and restructured the debug dump output for all resource
3375 descriptors. Improved readability of the output and reduced code size.
3377 Fixed a problem where changes to internal data structures caused the
3378 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
3380 Code and Data Size: The current and previous library sizes for the core
3381 subsystem are shown below. These are the code and data sizes for the
3382 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3383 values do not include any ACPI driver or OSPM code. The debug version of the
3384 code includes the debug output trace mechanism and has a much larger code
3385 and data size. Note that these values will vary depending on the efficiency
3386 of the compiler and the compiler options used during generation.
3389 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3390 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3392 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3393 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3396 2) iASL Compiler/Disassembler:
3398 Updated the disassembler to automatically insert an EndDependentFn() macro
3399 into the ASL stream if this macro is missing in the original AML code,
3400 simplifying compilation of the resulting ASL module.
3402 Fixed a problem in the disassembler where a disassembled ResourceSource
3403 string (within a large resource descriptor) was not surrounded by quotes and
3404 not followed by a comma, causing errors when the resulting ASL module was
3405 compiled. Also, escape sequences within a ResourceSource string are now
3406 handled correctly (especially "\\")
3408 ----------------------------------------
3409 02 September 2005. Summary of changes for version 20050902:
3411 1) ACPI CA Core Subsystem:
3413 Fixed a problem with the internal Owner ID allocation and deallocation
3414 mechanisms for control method execution and recursive method invocation.
3415 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
3416 messages seen on some systems. Recursive method invocation depth is
3417 currently limited to 255. (Alexey Starikovskiy)
3419 Completely eliminated all vestiges of support for the "module-level
3420 executable code" until this support is fully implemented and debugged. This
3421 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
3422 some systems that invoke this support.
3424 Fixed a problem within the resource manager code where the transaction flags
3425 for a 64-bit address descriptor were handled incorrectly in the type-
3428 Consolidated duplicate code within the address descriptor resource manager
3429 code, reducing overall subsystem code size.
3431 Fixed a fault when using the AML debugger "disassemble" command to
3432 disassemble individual control methods.
3434 Removed references to the "release_current" directory within the Unix
3437 Code and Data Size: The current and previous core subsystem library sizes
3438 are shown below. These are the code and data sizes for the acpica.lib
3439 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
3440 include any ACPI driver or OSPM code. The debug version of the code includes
3441 the debug output trace mechanism and has a much larger code and data size.
3442 Note that these values will vary depending on the efficiency of the compiler
3443 and the compiler options used during generation.
3446 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3447 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3449 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3450 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3453 2) iASL Compiler/Disassembler:
3455 Implemented an error check for illegal duplicate values in the interrupt and
3456 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
3459 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
3460 too many values in the interrupt list (16 max) and invalid values in the
3463 The maximum length string literal within an ASL file is now restricted to
3464 200 characters as per the ACPI specification.
3466 Fixed a fault when using the -ln option (generate namespace listing).
3468 Implemented an error check to determine if a DescriptorName within a
3469 resource descriptor has already been used within the current scope.
3471 ----------------------------------------
3472 15 August 2005. Summary of changes for version 20050815:
3474 1) ACPI CA Core Subsystem:
3476 Implemented a full bytewise compare to determine if a table load request is
3477 attempting to load a duplicate table. The compare is performed if the table
3478 signatures and table lengths match. This will allow different tables with
3479 the same OEM Table ID and revision to be loaded - probably against the ACPI
3480 specification, but discovered in the field nonetheless.
3482 Added the changes.txt logfile to each of the zipped release packages.
3484 Code and Data Size: Current and previous core subsystem library sizes are
3485 shown below. These are the code and data sizes for the acpica.lib produced
3486 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3487 any ACPI driver or OSPM code. The debug version of the code includes the
3488 debug output trace mechanism and has a much larger code and data size. Note
3489 that these values will vary depending on the efficiency of the compiler and
3490 the compiler options used during generation.
3493 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3494 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3496 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3497 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3500 2) iASL Compiler/Disassembler:
3502 Fixed a problem where incorrect AML code could be generated for Package
3503 objects if optimization is disabled (via the -oa switch).
3505 Fixed a problem with where incorrect AML code is generated for variable-
3506 length packages when the package length is not specified and the number of
3507 initializer values is greater than 255.
3510 ----------------------------------------
3511 29 July 2005. Summary of changes for version 20050729:
3513 1) ACPI CA Core Subsystem:
3515 Implemented support to ignore an attempt to install/load a particular ACPI
3516 table more than once. Apparently there exists BIOS code that repeatedly
3517 attempts to load the same SSDT upon certain events. With assistance from
3518 Venkatesh Pallipadi.
3520 Restructured the main interface to the AML parser in order to correctly
3521 handle all exceptional conditions. This will prevent leakage of the OwnerId
3522 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
3523 machines. With assistance from Alexey Starikovskiy.
3525 Support for "module level code" has been disabled in this version due to a
3526 number of issues that have appeared on various machines. The support can be
3527 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
3528 compilation. When the issues are fully resolved, the code will be enabled by
3531 Modified the internal functions for debug print support to define the
3532 FunctionName parameter as a (const char *) for compatibility with compiler
3533 built-in macros such as __FUNCTION__, etc.
3535 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
3537 Implemented support to display an object count summary for the AML Debugger
3538 commands Object and Methods.
3540 Code and Data Size: Current and previous core subsystem library sizes are
3541 shown below. These are the code and data sizes for the acpica.lib produced
3542 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3543 any ACPI driver or OSPM code. The debug version of the code includes the
3544 debug output trace mechanism and has a much larger code and data size. Note
3545 that these values will vary depending on the efficiency of the compiler and
3546 the compiler options used during generation.
3549 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3550 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3552 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3553 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3556 2) iASL Compiler/Disassembler:
3558 Fixed a regression that appeared in the 20050708 version of the compiler
3559 where an error message was inadvertently emitted for invocations of the _OSI
3560 reserved control method.
3562 ----------------------------------------
3563 08 July 2005. Summary of changes for version 20050708:
3565 1) ACPI CA Core Subsystem:
3567 The use of the CPU stack in the debug version of the subsystem has been
3568 considerably reduced. Previously, a debug structure was declared in every
3569 function that used the debug macros. This structure has been removed in
3570 favor of declaring the individual elements as parameters to the debug
3571 functions. This reduces the cumulative stack use during nested execution of
3572 ACPI function calls at the cost of a small increase in the code size of the
3573 debug version of the subsystem. With assistance from Alexey Starikovskiy and
3576 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
3577 headers to define a macro that will return the current function name at
3578 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
3579 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
3580 compiler-dependent header, the function name is saved on the CPU stack (one
3581 pointer per function.) This mechanism is used because apparently there
3582 exists no standard ANSI-C defined macro that that returns the function name.
3584 Redesigned and reimplemented the "Owner ID" mechanism used to track
3585 namespace objects created/deleted by ACPI tables and control method
3586 execution. A bitmap is now used to allocate and free the IDs, thus solving
3587 the wraparound problem present in the previous implementation. The size of
3588 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
3591 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
3592 flag definitions within the headers for the predefined ACPI tables. These
3593 have been replaced by UINT8_BIT in order to increase the code portability of
3594 the subsystem. If the use of UINT8 remains a problem, we may be forced to
3595 eliminate bitfields entirely because of a lack of portability.
3597 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
3598 is a frequently used function and this improvement increases the performance
3599 of the entire subsystem (Alexey Starikovskiy).
3601 Fixed several possible memory leaks and the inverse - premature object
3602 deletion (Alexey Starikovskiy).
3604 Code and Data Size: Current and previous core subsystem library sizes are
3605 shown below. These are the code and data sizes for the acpica.lib produced
3606 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3607 any ACPI driver or OSPM code. The debug version of the code includes the
3608 debug output trace mechanism and has a much larger code and data size. Note
3609 that these values will vary depending on the efficiency of the compiler and
3610 the compiler options used during generation.
3613 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3614 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3616 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3617 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3619 ----------------------------------------
3620 24 June 2005. Summary of changes for version 20050624:
3622 1) ACPI CA Core Subsystem:
3624 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
3625 the host-defined cache object. This allows the OSL implementation to define
3626 and type this object in any manner desired, simplifying the OSL
3627 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
3628 Linux, and should be defined in the OS-specific header file for other
3629 operating systems as required.
3631 Changed the interface to AcpiOsAcquireObject to directly return the
3632 requested object as the function return (instead of ACPI_STATUS.) This
3633 change was made for performance reasons, since this is the purpose of the
3634 interface in the first place. AcpiOsAcquireObject is now similar to the
3635 AcpiOsAllocate interface.
3637 Implemented a new AML debugger command named Businfo. This command displays
3638 information about all devices that have an associate _PRT object. The _ADR,
3639 _HID, _UID, and _CID are displayed for these devices.
3641 Modified the initialization sequence in AcpiInitializeSubsystem to call the
3642 OSL interface AcpiOslInitialize first, before any local initialization. This
3643 change was required because the global initialization now calls OSL
3646 Enhanced the Dump command to display the entire contents of Package objects
3647 (including all sub-objects and their values.)
3649 Restructured the code base to split some files because of size and/or
3650 because the code logically belonged in a separate file. New files are listed
3651 below. All makefiles and project files included in the ACPI CA release have
3653 utilities/utcache.c /* Local cache interfaces */
3654 utilities/utmutex.c /* Local mutex support */
3655 utilities/utstate.c /* State object support */
3656 interpreter/parser/psloop.c /* Main AML parse loop */
3658 Code and Data Size: Current and previous core subsystem library sizes are
3659 shown below. These are the code and data sizes for the acpica.lib produced
3660 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3661 any ACPI driver or OSPM code. The debug version of the code includes the
3662 debug output trace mechanism and has a much larger code and data size. Note
3663 that these values will vary depending on the efficiency of the compiler and
3664 the compiler options used during generation.
3667 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3668 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3670 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3671 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3674 2) iASL Compiler/Disassembler:
3676 Fixed a regression introduced in version 20050513 where the use of a Package
3677 object within a Case() statement caused a compile time exception. The
3678 original behavior has been restored (a Match() operator is emitted.)
3680 ----------------------------------------
3681 17 June 2005. Summary of changes for version 20050617:
3683 1) ACPI CA Core Subsystem:
3685 Moved the object cache operations into the OS interface layer (OSL) to allow
3686 the host OS to handle these operations if desired (for example, the Linux
3687 OSL will invoke the slab allocator). This support is optional; the compile
3688 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
3689 code in the ACPI CA core. The new OSL interfaces are shown below. See
3690 utalloc.c for an example implementation, and acpiosxf.h for the exact
3691 interface definitions. With assistance from Alexey Starikovskiy.
3698 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
3699 and restore a flags parameter. This fits better with many OS lock models.
3700 Note: the current execution state (interrupt handler or not) is no longer
3701 passed to these interfaces. If necessary, the OSL must determine this state
3702 by itself, a simple and fast operation. With assistance from Alexey
3705 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
3706 present if the revision of the RSDP was 2 or greater. According to the ACPI
3707 specification, the XSDT is optional in all cases, and the table manager
3708 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
3709 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
3712 Fixed an interpreter problem with the Mid() operator in the case of an input
3713 string where the resulting output string is of zero length. It now correctly
3714 returns a valid, null terminated string object instead of a string object
3715 with a null pointer.
3717 Fixed a problem with the control method argument handling to allow a store
3718 to an Arg object that already contains an object of type Device. The Device
3719 object is now correctly overwritten. Previously, an error was returned.
3722 Enhanced the debugger Find command to emit object values in addition to the
3723 found object pathnames. The output format is the same as the dump namespace
3726 Enhanced the debugger Set command. It now has the ability to set the value
3727 of any Named integer object in the namespace (Previously, only method locals
3728 and args could be set.)
3730 Code and Data Size: Current and previous core subsystem library sizes are
3731 shown below. These are the code and data sizes for the acpica.lib produced
3732 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3733 any ACPI driver or OSPM code. The debug version of the code includes the
3734 debug output trace mechanism and has a much larger code and data size. Note
3735 that these values will vary depending on the efficiency of the compiler and
3736 the compiler options used during generation.
3739 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3740 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3742 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3743 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3746 2) iASL Compiler/Disassembler:
3748 Fixed a regression in the disassembler where if/else/while constructs were
3749 output incorrectly. This problem was introduced in the previous release
3750 (20050526). This problem also affected the single-step disassembly in the
3753 Fixed a problem where compiling the reserved _OSI method would randomly (but
3754 rarely) produce compile errors.
3756 Enhanced the disassembler to emit compilable code in the face of incorrect
3757 AML resource descriptors. If the optional ResourceSourceIndex is present,
3758 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
3759 disassembly. Otherwise, the resulting code cannot be compiled without
3762 ----------------------------------------
3763 26 May 2005. Summary of changes for version 20050526:
3765 1) ACPI CA Core Subsystem:
3767 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
3768 the module level (not within a control method.) These opcodes are executed
3769 exactly once at the time the table is loaded. This type of code was legal up
3770 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
3771 order to provide backwards compatibility with earlier BIOS implementations.
3772 This eliminates the "Encountered executable code at module level" warning
3773 that was previously generated upon detection of such code.
3775 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
3776 inadvertently be generated during the lookup of namespace objects in the
3777 second pass parse of ACPI tables and control methods. It appears that this
3778 problem could occur during the resolution of forward references to namespace
3781 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
3782 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
3783 allows the deadlock detection debug code to be compiled out in the normal
3784 case, improving mutex performance (and overall subsystem performance)
3787 Implemented a handful of miscellaneous fixes for possible memory leaks on
3788 error conditions and error handling control paths. These fixes were
3789 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
3791 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
3792 to prevent a fault in this error case.
3794 Code and Data Size: Current and previous core subsystem library sizes are
3795 shown below. These are the code and data sizes for the acpica.lib produced
3796 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3797 any ACPI driver or OSPM code. The debug version of the code includes the
3798 debug output trace mechanism and has a much larger code and data size. Note
3799 that these values will vary depending on the efficiency of the compiler and
3800 the compiler options used during generation.
3803 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3804 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3806 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3807 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3810 2) iASL Compiler/Disassembler:
3812 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
3813 the module level (not within a control method.) These operators will be
3814 executed once at the time the table is loaded. This type of code was legal
3815 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
3816 compiler in order to provide backwards compatibility with earlier BIOS ASL
3819 The ACPI integer width (specified via the table revision ID or the -r
3820 override, 32 or 64 bits) is now used internally during compile-time constant
3821 folding to ensure that constants are truncated to 32 bits if necessary.
3822 Previously, the revision ID value was only emitted in the AML table header.
3824 An error message is now generated for the Mutex and Method operators if the
3825 SyncLevel parameter is outside the legal range of 0 through 15.
3827 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
3828 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
3829 The actual underlying implementation of method argument typechecking is
3830 still under development, however.
3832 ----------------------------------------
3833 13 May 2005. Summary of changes for version 20050513:
3835 1) ACPI CA Core Subsystem:
3837 Implemented support for PCI Express root bridges -- added support for device
3838 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
3840 The interpreter now automatically truncates incoming 64-bit constants to 32
3841 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
3842 also affects the iASL compiler constant folding. (Note: as per below, the
3843 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
3845 Fixed a problem where string and buffer objects with "static" pointers
3846 (pointers to initialization data within an ACPI table) were not handled
3847 consistently. The internal object copy operation now always copies the data
3848 to a newly allocated buffer, regardless of whether the source object is
3851 Fixed a problem with the FromBCD operator where an implicit result
3852 conversion was improperly performed while storing the result to the target
3853 operand. Since this is an "explicit conversion" operator, the implicit
3854 conversion should never be performed on the output.
3856 Fixed a problem with the CopyObject operator where a copy to an existing
3857 named object did not always completely overwrite the existing object stored
3858 at name. Specifically, a buffer-to-buffer copy did not delete the existing
3861 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
3862 structs for consistency.
3864 Code and Data Size: Current and previous core subsystem library sizes are
3865 shown below. These are the code and data sizes for the acpica.lib produced
3866 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3867 any ACPI driver or OSPM code. The debug version of the code includes the
3868 debug output trace mechanism and has a much larger code and data size. Note
3869 that these values will vary depending on the efficiency of the compiler and
3870 the compiler options used during generation.
3873 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3874 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3875 Current Release: (Same sizes)
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
3880 2) iASL Compiler/Disassembler:
3882 The compiler now emits a warning if an attempt is made to generate a 64-bit
3883 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
3884 is truncated to 32 bits.
3886 Fixed a problem with large package objects: if the static length of the
3887 package is greater than 255, the "variable length package" opcode is
3888 emitted. Previously, this caused an error. This requires an update to the
3889 ACPI spec, since it currently (incorrectly) states that packages larger than
3890 255 elements are not allowed.
3892 The disassembler now correctly handles variable length packages and packages
3893 larger than 255 elements.
3895 ----------------------------------------
3896 08 April 2005. Summary of changes for version 20050408:
3898 1) ACPI CA Core Subsystem:
3900 Fixed three cases in the interpreter where an "index" argument to an ASL
3901 function was still (internally) 32 bits instead of the required 64 bits.
3902 This was the Index argument to the Index, Mid, and Match operators.
3904 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
3905 not a POSIX-defined function and not present in most kernel-level C
3906 libraries. All references to the C library strupr function have been removed
3909 Completed the deployment of static functions/prototypes. All prototypes with
3910 the static attribute have been moved from the headers to the owning C file.
3912 Implemented an extract option (-e) for the AcpiBin utility (AML binary
3913 utility). This option allows the utility to extract individual ACPI tables
3914 from the output of AcpiDmp. It provides the same functionality of the
3915 acpixtract.pl perl script without the worry of setting the correct perl
3916 options. AcpiBin runs on Windows and has not yet been generated/validated in
3917 the Linux/Unix environment (but should be soon).
3919 Updated and fixed the table dump option for AcpiBin (-d). This option
3920 converts a single ACPI table to a hex/ascii file, similar to the output of
3923 Code and Data Size: Current and previous core subsystem library sizes are
3924 shown below. These are the code and data sizes for the acpica.lib produced
3925 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3926 any ACPI driver or OSPM code. The debug version of the code includes the
3927 debug output trace mechanism and has a much larger code and data size. Note
3928 that these values will vary depending on the efficiency of the compiler and
3929 the compiler options used during generation.
3932 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
3933 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
3935 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3936 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3939 2) iASL Compiler/Disassembler:
3941 Disassembler fix: Added a check to ensure that the table length found in the
3942 ACPI table header within the input file is not longer than the actual input
3943 file size. This indicates some kind of file or table corruption.
3945 ----------------------------------------
3946 29 March 2005. Summary of changes for version 20050329:
3948 1) ACPI CA Core Subsystem:
3950 An error is now generated if an attempt is made to create a Buffer Field of
3951 length zero (A CreateField with a length operand of zero.)
3953 The interpreter now issues a warning whenever executable code at the module
3954 level is detected during ACPI table load. This will give some idea of the
3955 prevalence of this type of code.
3957 Implemented support for references to named objects (other than control
3958 methods) within package objects.
3960 Enhanced package object output for the debug object. Package objects are now
3961 completely dumped, showing all elements.
3963 Enhanced miscellaneous object output for the debug object. Any object can
3964 now be written to the debug object (for example, a device object can be
3965 written, and the type of the object will be displayed.)
3967 The "static" qualifier has been added to all local functions across both the
3968 core subsystem and the iASL compiler.
3970 The number of "long" lines (> 80 chars) within the source has been
3971 significantly reduced, by about 1/3.
3973 Cleaned up all header files to ensure that all CA/iASL functions are
3974 prototyped (even static functions) and the formatting is consistent.
3976 Two new header files have been added, acopcode.h and acnames.h.
3978 Removed several obsolete functions that were no longer used.
3980 Code and Data Size: Current and previous core subsystem library sizes are
3981 shown below. These are the code and data sizes for the acpica.lib produced
3982 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3983 any ACPI driver or OSPM code. The debug version of the code includes the
3984 debug output trace mechanism and has a much larger code and data size. Note
3985 that these values will vary depending on the efficiency of the compiler and
3986 the compiler options used during generation.
3989 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
3990 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
3992 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
3993 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
3997 2) iASL Compiler/Disassembler:
3999 Fixed a problem with the resource descriptor generation/support. For the
4000 ResourceSourceIndex and the ResourceSource fields, both must be present, or
4001 both must be not present - can't have one without the other.
4003 The compiler now returns non-zero from the main procedure if any errors have
4004 occurred during the compilation.
4007 ----------------------------------------
4008 09 March 2005. Summary of changes for version 20050309:
4010 1) ACPI CA Core Subsystem:
4012 The string-to-buffer implicit conversion code has been modified again after
4013 a change to the ACPI specification. In order to match the behavior of the
4014 other major ACPI implementation, the target buffer is no longer truncated if
4015 the source string is smaller than an existing target buffer. This change
4016 requires an update to the ACPI spec, and should eliminate the recent
4017 AE_AML_BUFFER_LIMIT issues.
4019 The "implicit return" support was rewritten to a new algorithm that solves
4020 the general case. Rather than attempt to determine when a method is about to
4021 exit, the result of every ASL operator is saved momentarily until the very
4022 next ASL operator is executed. Therefore, no matter how the method exits,
4023 there will always be a saved implicit return value. This feature is only
4024 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
4025 AE_AML_NO_RETURN_VALUE errors when enabled.
4027 Implemented implicit conversion support for the predicate (operand) of the
4028 If, Else, and While operators. String and Buffer arguments are automatically
4029 converted to Integers.
4031 Changed the string-to-integer conversion behavior to match the new ACPI
4032 errata: "If no integer object exists, a new integer is created. The ASCII
4033 string is interpreted as a hexadecimal constant. Each string character is
4034 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
4035 with the first character as the most significant digit, and ending with the
4036 first non-hexadecimal character or end-of-string." This means that the first
4037 non-hex character terminates the conversion and this is the code that was
4040 Fixed a problem where the ObjectType operator would fail (fault) when used
4041 on an Index of a Package which pointed to a null package element. The
4042 operator now properly returns zero (Uninitialized) in this case.
4044 Fixed a problem where the While operator used excessive memory by not
4045 properly popping the result stack during execution. There was no memory leak
4046 after execution, however. (Code provided by Valery Podrezov.)
4048 Fixed a problem where references to control methods within Package objects
4049 caused the method to be invoked, instead of producing a reference object
4050 pointing to the method.
4052 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
4053 improve performance and reduce code size. (Code provided by Alexey
4056 Code and Data Size: Current and previous core subsystem library sizes are
4057 shown below. These are the code and data sizes for the acpica.lib produced
4058 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4059 any ACPI driver or OSPM code. The debug version of the code includes the
4060 debug output trace mechanism and has a much larger code and data size. Note
4061 that these values will vary depending on the efficiency of the compiler and
4062 the compiler options used during generation.
4065 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4066 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4068 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4069 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4072 2) iASL Compiler/Disassembler:
4074 Fixed a problem with the Return operator with no arguments. Since the AML
4075 grammar for the byte encoding requires an operand for the Return opcode, the
4076 compiler now emits a Return(Zero) for this case. An ACPI specification
4077 update has been written for this case.
4079 For tables other than the DSDT, namepath optimization is automatically
4080 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
4081 compiler has no knowledge of where, and thus cannot optimize namepaths.
4083 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
4084 inadvertently omitted from the ACPI specification, and will require an
4087 The source file scan for ASCII characters is now optional (-a). This change
4088 was made because some vendors place non-ascii characters within comments.
4089 However, the scan is simply a brute-force byte compare to ensure all
4090 characters in the file are in the range 0x00 to 0x7F.
4092 Fixed a problem with the CondRefOf operator where the compiler was
4093 inappropriately checking for the existence of the target. Since the point of
4094 the operator is to check for the existence of the target at run-time, the
4095 compiler no longer checks for the target existence.
4097 Fixed a problem where errors generated from the internal AML interpreter
4098 during constant folding were not handled properly, causing a fault.
4100 Fixed a problem with overly aggressive range checking for the Stall
4101 operator. The valid range (max 255) is now only checked if the operand is of
4102 type Integer. All other operand types cannot be statically checked.
4104 Fixed a problem where control method references within the RefOf, DeRefOf,
4105 and ObjectType operators were not treated properly. They are now treated as
4106 actual references, not method invocations.
4108 Fixed and enhanced the "list namespace" option (-ln). This option was broken
4109 a number of releases ago.
4111 Improved error handling for the Field, IndexField, and BankField operators.
4112 The compiler now cleanly reports and recovers from errors in the field
4113 component (FieldUnit) list.
4115 Fixed a disassembler problem where the optional ResourceDescriptor fields
4116 TRS and TTP were not always handled correctly.
4118 Disassembler - Comments in output now use "//" instead of "/*"
4120 ----------------------------------------
4121 28 February 2005. Summary of changes for version 20050228:
4123 1) ACPI CA Core Subsystem:
4125 Fixed a problem where the result of an Index() operator (an object
4126 reference) must increment the reference count on the target object for the
4127 life of the object reference.
4129 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
4130 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
4131 resource descriptors.
4133 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
4134 Space Descriptor" string, indicating interpreter support for the descriptors
4137 Implemented header support for the new ACPI 3.0 FADT flag bits.
4139 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
4140 status/enable registers.
4142 Updated header support for the MADT processor local Apic struct and MADT
4143 platform interrupt source struct for new ACPI 3.0 fields.
4145 Implemented header support for the SRAT and SLIT ACPI tables.
4147 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
4150 Code and Data Size: Current and previous core subsystem library sizes are
4151 shown below. These are the code and data sizes for the acpica.lib produced
4152 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4153 any ACPI driver or OSPM code. The debug version of the code includes the
4154 debug output trace mechanism and has a much larger code and data size. Note
4155 that these values will vary depending on the efficiency of the compiler and
4156 the compiler options used during generation.
4159 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4160 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4162 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4163 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4166 2) iASL Compiler/Disassembler:
4168 Fixed a problem with the internal 64-bit String-to-integer conversion with
4169 strings less than two characters long.
4171 Fixed a problem with constant folding where the result of the Index()
4172 operator can not be considered a constant. This means that Index() cannot be
4173 a type3 opcode and this will require an update to the ACPI specification.
4175 Disassembler: Implemented support for the TTP, MTP, and TRS resource
4176 descriptor fields. These fields were inadvertently ignored and not output in
4177 the disassembly of the resource descriptor.
4180 ----------------------------------------
4181 11 February 2005. Summary of changes for version 20050211:
4183 1) ACPI CA Core Subsystem:
4185 Implemented ACPI 3.0 support for implicit conversion within the Match()
4186 operator. MatchObjects can now be of type integer, buffer, or string instead
4187 of just type integer. Package elements are implicitly converted to the type
4188 of the MatchObject. This change aligns the behavior of Match() with the
4189 behavior of the other logical operators (LLess(), etc.) It also requires an
4190 errata change to the ACPI specification as this support was intended for
4191 ACPI 3.0, but was inadvertently omitted.
4193 Fixed a problem with the internal implicit "to buffer" conversion. Strings
4194 that are converted to buffers will cause buffer truncation if the string is
4195 smaller than the target buffer. Integers that are converted to buffers will
4196 not cause buffer truncation, only zero extension (both as per the ACPI
4197 spec.) The problem was introduced when code was added to truncate the
4198 buffer, but this should not be performed in all cases, only the string case.
4200 Fixed a problem with the Buffer and Package operators where the interpreter
4201 would get confused if two such operators were used as operands to an ASL
4202 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
4203 stack was not being popped after the execution of these operators, resulting
4204 in an AE_NO_RETURN_VALUE exception.
4206 Fixed a problem with constructs of the form Store(Index(...),...). The
4207 reference object returned from Index was inadvertently resolved to an actual
4208 value. This problem was introduced in version 20050114 when the behavior of
4209 Store() was modified to restrict the object types that can be used as the
4210 source operand (to match the ACPI specification.)
4212 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
4214 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
4216 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
4218 Code and Data Size: Current and previous core subsystem library sizes are
4219 shown below. These are the code and data sizes for the acpica.lib produced
4220 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4221 any ACPI driver or OSPM code. The debug version of the code includes the
4222 debug output trace mechanism and has a much larger code and data size. Note
4223 that these values will vary depending on the efficiency of the compiler and
4224 the compiler options used during generation.
4227 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4228 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4230 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4231 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4234 2) iASL Compiler/Disassembler:
4236 Fixed a code generation problem in the constant folding optimization code
4237 where incorrect code was generated if a constant was reduced to a buffer
4238 object (i.e., a reduced type 5 opcode.)
4240 Fixed a typechecking problem for the ToBuffer operator. Caused by an
4241 incorrect return type in the internal opcode information table.
4243 ----------------------------------------
4244 25 January 2005. Summary of changes for version 20050125:
4246 1) ACPI CA Core Subsystem:
4248 Fixed a recently introduced problem with the Global Lock where the
4249 underlying semaphore was not created. This problem was introduced in
4250 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
4251 Acquire() operation on _GL.
4253 The local object cache is now optional, and is disabled by default. Both
4254 AcpiExec and the iASL compiler enable the cache because they run in user
4255 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
4256 to enable the local cache.
4258 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
4259 optional "implicit return" support where an error was returned if no return
4260 object was expected, but one was implicitly returned. AE_OK is now returned
4261 in this case and the implicitly returned object is deleted.
4262 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
4263 methods such as _STA and _INI where the return type is known up front.
4265 Fixed a few issues with the internal convert-to-integer code. It now returns
4266 an error if an attempt is made to convert a null string, a string of only
4267 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
4268 and explicit conversion via the ToInteger() operator.
4270 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
4271 not needed for normal operation and should increase the performance of the
4272 entire subsystem. The code remains in case it is needed for debug purposes
4275 The AcpiExec source and makefile are included in the Unix/Linux package for
4278 Code and Data Size: Current and previous core subsystem library sizes are
4279 shown below. These are the code and data sizes for the acpica.lib produced
4280 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4281 any ACPI driver or OSPM code. The debug version of the code includes the
4282 debug output trace mechanism and has a much larger code and data size. Note
4283 that these values will vary depending on the efficiency of the compiler and
4284 the compiler options used during generation.
4287 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4288 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4290 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4291 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4293 2) iASL Compiler/Disassembler:
4295 Switch/Case support: A warning is now issued if the type of the Switch value
4296 cannot be determined at compile time. For example, Switch(Arg0) will
4297 generate the warning, and the type is assumed to be an integer. As per the
4298 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
4301 Switch/Case support: Implemented support for buffer and string objects as
4302 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
4303 buffers and strings.
4305 Switch/Case support: The emitted code for the LEqual() comparisons now uses
4306 the switch value as the first operand, not the second. The case value is now
4307 the second operand, and this allows the case value to be implicitly
4308 converted to the type of the switch value, not the other way around.
4310 Switch/Case support: Temporary variables are now emitted immediately within
4311 the control method, not at the global level. This means that there are now
4312 36 temps available per-method, not 36 temps per-module as was the case with
4313 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
4315 ----------------------------------------
4316 14 January 2005. Summary of changes for version 20050114:
4318 Added 2005 copyright to all module headers. This affects every module in
4319 the core subsystem, iASL compiler, and the utilities.
4321 1) ACPI CA Core Subsystem:
4323 Fixed an issue with the String-to-Buffer conversion code where the string
4324 null terminator was not included in the buffer after conversion, but there
4325 is existing ASL that assumes the string null terminator is included. This is
4326 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
4327 introduced in the previous version when the code was updated to correctly
4328 set the converted buffer size as per the ACPI specification. The ACPI spec
4329 is ambiguous and will be updated to specify that the null terminator must be
4330 included in the converted buffer. This also affects the ToBuffer() ASL
4333 Fixed a problem with the Mid() ASL/AML operator where it did not work
4334 correctly on Buffer objects. Newly created sub-buffers were not being marked
4338 Fixed a problem in AcpiTbFindTable where incorrect string compares were
4339 performed on the OemId and OemTableId table header fields. These fields are
4340 not null terminated, so strncmp is now used instead of strcmp.
4342 Implemented a restriction on the Store() ASL/AML operator to align the
4343 behavior with the ACPI specification. Previously, any object could be used
4344 as the source operand. Now, the only objects that may be used are Integers,
4345 Buffers, Strings, Packages, Object References, and DDB Handles. If
4346 necessary, the original behavior can be restored by enabling the
4347 EnableInterpreterSlack flag.
4349 Enhanced the optional "implicit return" support to allow an implicit return
4350 value from methods that are invoked externally via the AcpiEvaluateObject
4351 interface. This enables implicit returns from the _STA and _INI methods,
4354 Changed the Revision() ASL/AML operator to return the current version of the
4355 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
4356 the supported ACPI version (This is the function of the _REV method).
4358 Updated the _REV predefined method to return the currently supported version
4361 Implemented batch mode option for the AcpiExec utility (-b).
4363 Code and Data Size: Current and previous core subsystem library sizes are
4364 shown below. These are the code and data sizes for the acpica.lib produced
4365 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4366 any ACPI driver or OSPM code. The debug version of the code includes the
4367 debug output trace mechanism and has a much larger code and data size. Note
4368 that these values will vary depending on the efficiency of the compiler and
4369 the compiler options used during generation.
4372 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4373 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4375 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4376 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4378 ----------------------------------------
4379 10 December 2004. Summary of changes for version 20041210:
4381 ACPI 3.0 support is nearing completion in both the iASL compiler and the
4382 ACPI CA core subsystem.
4384 1) ACPI CA Core Subsystem:
4386 Fixed a problem in the ToDecimalString operator where the resulting string
4387 length was incorrectly calculated. The length is now calculated exactly,
4388 eliminating incorrect AE_STRING_LIMIT exceptions.
4390 Fixed a problem in the ToHexString operator to allow a maximum 200 character
4391 string to be produced.
4393 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
4394 routine where the length of the resulting buffer was not truncated to the
4395 new size (if the target buffer already existed).
4397 Code and Data Size: Current and previous core subsystem library sizes are
4398 shown below. These are the code and data sizes for the acpica.lib produced
4399 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4400 any ACPI driver or OSPM code. The debug version of the code includes the
4401 debug output trace mechanism and has a much larger code and data size. Note
4402 that these values will vary depending on the efficiency of the compiler and
4403 the compiler options used during generation.
4406 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4407 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4409 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4410 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4413 2) iASL Compiler/Disassembler:
4415 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
4416 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
4417 Includes support in the disassembler.
4419 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
4422 Fixed a problem where the _HE resource name for the Interrupt macro was
4423 referencing bit 0 instead of bit 1.
4425 Implemented check for maximum 255 interrupts in the Interrupt macro.
4427 Fixed a problem with the predefined resource descriptor names where
4428 incorrect AML code was generated if the offset within the resource buffer
4429 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
4430 but did not update the surrounding package lengths.
4432 Changes to the Dma macro: All channels within the channel list must be in
4433 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
4434 optional (default is BusMaster).
4436 Implemented check for maximum 7 data bytes for the VendorShort macro.
4438 The ReadWrite parameter is now optional for the Memory32 and similar macros.
4440 ----------------------------------------
4441 03 December 2004. Summary of changes for version 20041203:
4443 1) ACPI CA Core Subsystem:
4445 The low-level field insertion/extraction code (exfldio) has been completely
4446 rewritten to eliminate unnecessary complexity, bugs, and boundary
4449 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
4450 operators where the input operand could be inadvertently deleted if no
4451 conversion was necessary (e.g., if the input to ToInteger was an Integer
4454 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
4455 exception code was returned if the resulting string would be > 200 chars.
4456 AE_STRING_LIMIT is now returned.
4458 Fixed a problem with the Concatenate operator where AE_OK was always
4459 returned, even if the operation failed.
4461 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
4462 semaphores to be allocated.
4464 Code and Data Size: Current and previous core subsystem library sizes are
4465 shown below. These are the code and data sizes for the acpica.lib produced
4466 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4467 any ACPI driver or OSPM code. The debug version of the code includes the
4468 debug output trace mechanism and has a much larger code and data size. Note
4469 that these values will vary depending on the efficiency of the compiler and
4470 the compiler options used during generation.
4473 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4474 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4476 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4477 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4480 2) iASL Compiler/Disassembler:
4482 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
4483 recently introduced in 20041119.
4485 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
4486 byte was inadvertently set to zero.
4488 ----------------------------------------
4489 19 November 2004. Summary of changes for version 20041119:
4491 1) ACPI CA Core Subsystem:
4493 Fixed a problem in the internal ConvertToInteger routine where new integers
4494 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
4495 buffers and strings to integers.
4497 Implemented support to store a value to an Index() on a String object. This
4498 is an ACPI 2.0 feature that had not yet been implemented.
4500 Implemented new behavior for storing objects to individual package elements
4501 (via the Index() operator). The previous behavior was to invoke the implicit
4502 conversion rules if an object was already present at the index. The new
4503 behavior is to simply delete any existing object and directly store the new
4504 object. Although the ACPI specification seems unclear on this subject, other
4505 ACPI implementations behave in this manner. (This is the root of the
4506 AE_BAD_HEX_CONSTANT issue.)
4508 Modified the RSDP memory scan mechanism to support the extended checksum for
4509 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
4510 RSDP signature is found with a valid checksum.
4512 Code and Data Size: Current and previous core subsystem library sizes are
4513 shown below. These are the code and data sizes for the acpica.lib produced
4514 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4515 any ACPI driver or OSPM code. The debug version of the code includes the
4516 debug output trace mechanism and has a much larger code and data size. Note
4517 that these values will vary depending on the efficiency of the compiler and
4518 the compiler options used during generation.
4521 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4522 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4524 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4525 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4528 2) iASL Compiler/Disassembler:
4530 Fixed a missing semicolon in the aslcompiler.y file.
4532 ----------------------------------------
4533 05 November 2004. Summary of changes for version 20041105:
4535 1) ACPI CA Core Subsystem:
4537 Implemented support for FADT revision 2. This was an interim table (between
4538 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
4540 Implemented optional support to allow uninitialized LocalX and ArgX
4541 variables in a control method. The variables are initialized to an Integer
4542 object with a value of zero. This support is enabled by setting the
4543 AcpiGbl_EnableInterpreterSlack flag to TRUE.
4545 Implemented support for Integer objects for the SizeOf operator. Either 4
4546 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
4547 depending on the parent table revision).
4549 Fixed a problem in the implementation of the SizeOf and ObjectType operators
4550 where the operand was resolved to a value too early, causing incorrect
4551 return values for some objects.
4553 Fixed some possible memory leaks during exceptional conditions.
4555 Code and Data Size: Current and previous core subsystem library sizes are
4556 shown below. These are the code and data sizes for the acpica.lib produced
4557 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4558 any ACPI driver or OSPM code. The debug version of the code includes the
4559 debug output trace mechanism and has a much larger code and data size. Note
4560 that these values will vary depending on the efficiency of the compiler and
4561 the compiler options used during generation.
4564 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4565 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4567 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4568 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4571 2) iASL Compiler/Disassembler:
4573 Implemented support for all ACPI 3.0 reserved names and methods.
4575 Implemented all ACPI 3.0 grammar elements in the front-end, including
4576 support for semicolons.
4578 Implemented the ACPI 3.0 Function() and ToUUID() macros
4580 Fixed a problem in the disassembler where a Scope() operator would not be
4581 emitted properly if the target of the scope was in another table.
4583 ----------------------------------------
4584 15 October 2004. Summary of changes for version 20041015:
4586 Note: ACPI CA is currently undergoing an in-depth and complete formal
4587 evaluation to test/verify the following areas. Other suggestions are
4588 welcome. This will result in an increase in the frequency of releases and
4589 the number of bug fixes in the next few months.
4590 - Functional tests for all ASL/AML operators
4591 - All implicit/explicit type conversions
4592 - Bit fields and operation regions
4593 - 64-bit math support and 32-bit-only "truncated" math support
4594 - Exceptional conditions, both compiler and interpreter
4595 - Dynamic object deletion and memory leaks
4596 - ACPI 3.0 support when implemented
4597 - External interfaces to the ACPI subsystem
4600 1) ACPI CA Core Subsystem:
4602 Fixed two alignment issues on 64-bit platforms - within debug statements in
4603 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
4604 field within the non-aligned ACPI generic address structure.
4606 Fixed a problem in the Increment and Decrement operators where incorrect
4607 operand resolution could result in the inadvertent modification of the
4608 original integer when the integer is passed into another method as an
4609 argument and the arg is then incremented/decremented.
4611 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
4612 BCD number were truncated during conversion.
4614 Fixed a problem in the ToDecimal operator where the length of the resulting
4615 string could be set incorrectly too long if the input operand was a Buffer
4618 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
4619 within a buffer would prematurely terminate a compare between buffer
4622 Added a check for string overflow (>200 characters as per the ACPI
4623 specification) during the Concatenate operator with two string operands.
4625 Code and Data Size: Current and previous core subsystem library sizes are
4626 shown below. These are the code and data sizes for the acpica.lib produced
4627 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4628 any ACPI driver or OSPM code. The debug version of the code includes the
4629 debug output trace mechanism and has a much larger code and data size. Note
4630 that these values will vary depending on the efficiency of the compiler and
4631 the compiler options used during generation.
4634 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4635 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
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
4642 2) iASL Compiler/Disassembler:
4644 Allow the use of the ObjectType operator on uninitialized Locals and Args
4645 (returns 0 as per the ACPI specification).
4647 Fixed a problem where the compiler would fault if there was a syntax error
4648 in the FieldName of all of the various CreateXXXField operators.
4650 Disallow the use of lower case letters within the EISAID macro, as per the
4651 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
4652 U is an uppercase letter and N is a hex digit.
4655 ----------------------------------------
4656 06 October 2004. Summary of changes for version 20041006:
4658 1) ACPI CA Core Subsystem:
4660 Implemented support for the ACPI 3.0 Timer operator. This ASL function
4661 implements a 64-bit timer with 100 nanosecond granularity.
4663 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
4664 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
4665 the timer with the best clock available. Also, it keeps the core subsystem
4666 out of the clock handling business, since the host OS (usually) performs
4669 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
4670 functions use a 64-bit address which is part of the packed ACPI Generic
4671 Address Structure. Since the structure is non-aligned, the alignment macros
4672 are now used to extract the address to a local variable before use.
4674 Fixed a problem where the ToInteger operator assumed all input strings were
4675 hexadecimal. The operator now handles both decimal strings and hex strings
4676 (prefixed with "0x").
4678 Fixed a problem where the string length in the string object created as a
4679 result of the internal ConvertToString procedure could be incorrect. This
4680 potentially affected all implicit conversions and also the ToDecimalString
4681 and ToHexString operators.
4683 Fixed two problems in the ToString operator. If the length parameter was
4684 zero, an incorrect string object was created and the value of the input
4685 length parameter was inadvertently changed from zero to Ones.
4687 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
4688 resource macro was ignored.
4690 Simplified the interfaces to the internal division functions, reducing code
4691 size and complexity.
4693 Code and Data Size: Current and previous core subsystem library sizes are
4694 shown below. These are the code and data sizes for the acpica.lib produced
4695 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4696 any ACPI driver or OSPM code. The debug version of the code includes the
4697 debug output trace mechanism and has a much larger code and data size. Note
4698 that these values will vary depending on the efficiency of the compiler and
4699 the compiler options used during generation.
4702 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4703 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4705 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4706 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4709 2) iASL Compiler/Disassembler:
4711 Implemented support for the ACPI 3.0 Timer operator.
4713 Fixed a problem where the Default() operator was inadvertently ignored in a
4714 Switch/Case block. This was a problem in the translation of the Switch
4715 statement to If...Else pairs.
4717 Added support to allow a standalone Return operator, with no parentheses (or
4720 Fixed a problem with code generation for the ElseIf operator where the
4721 translated Else...If parse tree was improperly constructed leading to the
4724 ----------------------------------------
4725 22 September 2004. Summary of changes for version 20040922:
4727 1) ACPI CA Core Subsystem:
4729 Fixed a problem with the implementation of the LNot() operator where "Ones"
4730 was not returned for the TRUE case. Changed the code to return Ones instead
4731 of (!Arg) which was usually 1. This change affects iASL constant folding for
4734 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
4735 initialized properly -- Now zero the entire buffer in this case where the
4736 buffer already exists.
4738 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
4739 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
4740 related code considerably. This will require changes/updates to all OS
4741 interface layers (OSLs.)
4743 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
4744 a system exception handler to be installed. This handler is invoked upon any
4745 run-time exception that occurs during control method execution.
4747 Added support for the DSDT in AcpiTbFindTable. This allows the
4748 DataTableRegion() operator to access the local copy of the DSDT.
4750 Code and Data Size: Current and previous core subsystem library sizes are
4751 shown below. These are the code and data sizes for the acpica.lib produced
4752 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4753 any ACPI driver or OSPM code. The debug version of the code includes the
4754 debug output trace mechanism and has a much larger code and data size. Note
4755 that these values will vary depending on the efficiency of the compiler and
4756 the compiler options used during generation.
4759 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4760 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4762 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4763 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4766 2) iASL Compiler/Disassembler:
4768 Fixed a problem with constant folding and the LNot operator. LNot was
4769 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
4770 could result in the generation of an incorrect folded/reduced constant.
4772 End-Of-File is now allowed within a "//"-style comment. A parse error no
4773 longer occurs if such a comment is at the very end of the input ASL source
4776 Implemented the "-r" option to override the Revision in the table header.
4777 The initial use of this option will be to simplify the evaluation of the AML
4778 interpreter by allowing a single ASL source module to be compiled for either
4779 32-bit or 64-bit integers.
4782 ----------------------------------------
4783 27 August 2004. Summary of changes for version 20040827:
4785 1) ACPI CA Core Subsystem:
4787 - Implemented support for implicit object conversion in the non-numeric
4788 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
4789 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
4790 the second operand is implicitly converted on the fly to match the type of
4791 the first operand. For example:
4793 LEqual (Source1, Source2)
4795 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
4796 The data type of Source1 dictates the required type of Source2. Source2 is
4797 implicitly converted if necessary to match the type of Source1.
4799 - Updated and corrected the behavior of the string conversion support. The
4800 rules concerning conversion of buffers to strings (according to the ACPI
4801 specification) are as follows:
4803 ToDecimalString - explicit byte-wise conversion of buffer to string of
4804 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
4805 conversion of buffer to string of hex values (0-FF) separated by commas.
4806 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
4807 copy with no transform except NULL terminated. Any other implicit buffer-to-
4808 string conversion - byte-wise conversion of buffer to string of hex values
4809 (0-FF) separated by spaces.
4811 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
4813 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
4814 one byte too short in the case of a node in the root scope. This could
4815 cause a fault during debug output.
4817 - Code and Data Size: Current and previous core subsystem library sizes are
4818 shown below. These are the code and data sizes for the acpica.lib produced
4819 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4820 any ACPI driver or OSPM code. The debug version of the code includes the
4821 debug output trace mechanism and has a much larger code and data size. Note
4822 that these values will vary depending on the efficiency of the compiler and
4823 the compiler options used during generation.
4826 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4827 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4829 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4830 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4833 2) iASL Compiler/Disassembler:
4835 - Fixed a Linux generation error.
4838 ----------------------------------------
4839 16 August 2004. Summary of changes for version 20040816:
4841 1) ACPI CA Core Subsystem:
4843 Designed and implemented support within the AML interpreter for the so-
4844 called "implicit return". This support returns the result of the last ASL
4845 operation within a control method, in the absence of an explicit Return()
4846 operator. A few machines depend on this behavior, even though it is not
4847 explicitly supported by the ASL language. It is optional support that can
4848 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
4850 Removed support for the PCI_Config address space from the internal low level
4851 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
4852 support was not used internally, and would not work correctly anyway because
4853 the PCI bus number and segment number were not supported. There are
4854 separate interfaces for PCI configuration space access because of the unique
4857 Code and Data Size: Current and previous core subsystem library sizes are
4858 shown below. These are the code and data sizes for the acpica.lib produced
4859 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4860 any ACPI driver or OSPM code. The debug version of the code includes the
4861 debug output trace mechanism and has a much larger code and data size. Note
4862 that these values will vary depending on the efficiency of the compiler and
4863 the compiler options used during generation.
4866 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4867 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
4869 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4870 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4873 2) iASL Compiler/Disassembler:
4875 Fixed a problem where constants in ASL expressions at the root level (not
4876 within a control method) could be inadvertently truncated during code
4877 generation. This problem was introduced in the 20040715 release.
4880 ----------------------------------------
4881 15 July 2004. Summary of changes for version 20040715:
4883 1) ACPI CA Core Subsystem:
4885 Restructured the internal HW GPE interfaces to pass/track the current state
4886 of interrupts (enabled/disabled) in order to avoid possible deadlock and
4887 increase flexibility of the interfaces.
4889 Implemented a "lexicographical compare" for String and Buffer objects within
4890 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
4891 as per further clarification to the ACPI specification. Behavior is similar
4892 to C library "strcmp".
4894 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
4895 external function. In the 32-bit non-debug case, the stack use has been
4896 reduced from 168 bytes to 32 bytes.
4898 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
4899 whose purpose is to allow the AML interpreter to forgive certain bad AML
4900 constructs. Default setting is FALSE.
4902 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
4903 support code. If enabled, it allows field access to go beyond the end of a
4904 region definition if the field is within the region length rounded up to the
4905 next access width boundary (a common coding error.)
4907 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
4908 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
4909 symbols are lowercased by the latest version of the AcpiSrc tool.
4911 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
4912 rename "Register" to simply "Reg" to prevent certain compilers from
4915 Code and Data Size: Current and previous core subsystem library sizes are
4916 shown below. These are the code and data sizes for the acpica.lib produced
4917 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4918 any ACPI driver or OSPM code. The debug version of the code includes the
4919 debug output trace mechanism and has a much larger code and data size. Note
4920 that these values will vary depending on the efficiency of the compiler and
4921 the compiler options used during generation.
4924 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4925 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
4927 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4928 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
4931 2) iASL Compiler/Disassembler:
4933 Implemented full support for Package objects within the Case() operator.
4934 Note: The Break() operator is currently not supported within Case blocks
4935 (TermLists) as there is some question about backward compatibility with ACPI
4939 Fixed a problem where complex terms were not supported properly within the
4942 Eliminated extraneous warning for compiler-emitted reserved names of the
4943 form "_T_x". (Used in Switch/Case operators.)
4945 Eliminated optimization messages for "_T_x" objects and small constants
4946 within the DefinitionBlock operator.
4949 ----------------------------------------
4950 15 June 2004. Summary of changes for version 20040615:
4952 1) ACPI CA Core Subsystem:
4954 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
4955 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
4958 All directory names in the entire source package are lower case, as they
4959 were in earlier releases.
4961 Implemented "Disassemble" command in the AML debugger that will disassemble
4962 a single control method.
4964 Code and Data Size: Current and previous core subsystem library sizes are
4965 shown below. These are the code and data sizes for the acpica.lib produced
4966 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4967 any ACPI driver or OSPM code. The debug version of the code includes the
4968 debug output trace mechanism and has a much larger code and data size. Note
4969 that these values will vary depending on the efficiency of the compiler and
4970 the compiler options used during generation.
4973 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
4974 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
4977 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4978 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
4981 2) iASL Compiler/Disassembler:
4983 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
4984 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
4987 All directory names in the entire source package are lower case, as they
4988 were in earlier releases.
4990 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
4993 Fixed an issue with the Windows version of the compiler where later versions
4994 of Windows place the FADT in the registry under the name "FADT" and not
4995 "FACP" as earlier versions did. This applies when using the -g or -
4996 d<nofilename> options. The compiler now looks for both strings as
4999 Fixed a problem with compiler namepath optimization where a namepath within
5000 the Scope() operator could not be optimized if the namepath was a subpath of
5001 the current scope path.
5003 ----------------------------------------
5004 27 May 2004. Summary of changes for version 20040527:
5006 1) ACPI CA Core Subsystem:
5008 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
5009 support in the RSDP scan code. The original code improperly scanned for the
5010 EBDA by simply scanning from memory location 0 to 0x400. The correct method
5011 is to first obtain the EBDA pointer from within the BIOS data area, then
5012 scan 1K of memory starting at the EBDA pointer. There appear to be few if
5013 any machines that place the RSDP in the EBDA, however.
5015 Integrated a fix for a possible fault during evaluation of BufferField
5016 arguments. Obsolete code that was causing the problem was removed.
5018 Found and fixed a problem in the Field Support Code where data could be
5019 corrupted on a bit field read that starts on an aligned boundary but does
5020 not end on an aligned boundary. Merged the read/write "datum length"
5021 calculation code into a common procedure.
5023 Rolled in a couple of changes to the FreeBSD-specific header.
5026 Code and Data Size: Current and previous core subsystem library sizes are
5027 shown below. These are the code and data sizes for the acpica.lib produced
5028 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5029 any ACPI driver or OSPM code. The debug version of the code includes the
5030 debug output trace mechanism and has a much larger code and data size. Note
5031 that these values will vary depending on the efficiency of the compiler and
5032 the compiler options used during generation.
5035 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5036 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5038 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5039 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5042 2) iASL Compiler/Disassembler:
5044 Fixed a generation warning produced by some overly-verbose compilers for a
5047 ----------------------------------------
5048 14 May 2004. Summary of changes for version 20040514:
5050 1) ACPI CA Core Subsystem:
5052 Fixed a problem where hardware GPE enable bits sometimes not set properly
5053 during and after GPE method execution. Result of 04/27 changes.
5055 Removed extra "clear all GPEs" when sleeping/waking.
5057 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
5058 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
5059 the new AcpiEv* calls as appropriate.
5061 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
5062 now "Microsoft Windows NT" for maximum compatibility. However this can be
5063 changed by modifying the acconfig.h file.
5065 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
5066 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
5068 Run _INI methods on ThermalZone objects. This is against the ACPI
5069 specification, but there is apparently ASL code in the field that has these
5070 _INI methods, and apparently "other" AML interpreters execute them.
5072 Performed a full 16/32/64 bit lint that resulted in some small changes.
5074 Added a sleep simulation command to the AML debugger to test sleep code.
5076 Code and Data Size: Current and previous core subsystem library sizes are
5077 shown below. These are the code and data sizes for the acpica.lib produced
5078 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5079 any ACPI driver or OSPM code. The debug version of the code includes the
5080 debug output trace mechanism and has a much larger code and data size. Note
5081 that these values will vary depending on the efficiency of the compiler and
5082 the compiler options used during generation.
5085 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5086 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5088 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5089 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5091 ----------------------------------------
5092 27 April 2004. Summary of changes for version 20040427:
5094 1) ACPI CA Core Subsystem:
5096 Completed a major overhaul of the GPE handling within ACPI CA. There are
5097 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
5098 The only GPEs allowed to be combination wake/run are for button-style
5099 devices such as a control-method power button, control-method sleep button,
5100 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
5101 referenced by any _PRW methods are marked for "runtime" and hardware
5102 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
5103 (and disabled at runtime). However, at sleep time, only those GPEs that
5104 have been specifically enabled for wake via the AcpiEnableGpe interface will
5105 actually be hardware enabled.
5107 A new external interface has been added, AcpiSetGpeType(), that is meant to
5108 be used by device drivers to force a GPE to a particular type. It will be
5109 especially useful for the drivers for the button devices mentioned above.
5111 Completed restructuring of the ACPI CA initialization sequence so that
5112 default operation region handlers are installed before GPEs are initialized
5113 and the _PRW methods are executed. This will prevent errors when the _PRW
5114 methods attempt to access system memory or I/O space.
5116 GPE enable/disable no longer reads the GPE enable register. We now keep the
5117 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
5118 thus no longer depend on the hardware to maintain these bits.
5120 Always clear the wake status and fixed/GPE status bits before sleep, even
5123 Improved the AML debugger output for displaying the GPE blocks and their
5126 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
5129 Fixed a problem where the physical address was incorrectly calculated when
5130 the Load() operator was used to directly load from an Operation Region (vs.
5131 loading from a Field object.) Also added check for minimum table length for
5134 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
5137 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
5138 consistency with the other fields returned.
5140 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
5141 structure for each GPE in the system, so the size of this structure is
5144 CPU stack requirement reduction: Cleaned up the method execution and object
5145 evaluation paths so that now a parameter structure is passed, instead of
5146 copying the various method parameters over and over again.
5148 In evregion.c: Correctly exit and reenter the interpreter region if and
5149 only if dispatching an operation region request to a user-installed handler.
5150 Do not exit/reenter when dispatching to a default handler (e.g., default
5151 system memory or I/O handlers)
5154 Notes for updating drivers for the new GPE support. The following changes
5155 must be made to ACPI-related device drivers that are attached to one or more
5156 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
5158 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
5159 explicitly call AcpiEnableGpe.
5160 2) There is a new interface called AcpiSetGpeType. This should be called
5161 before enabling the GPE. Also, this interface will automatically disable
5162 the GPE if it is currently enabled.
5163 3) AcpiEnableGpe no longer supports a GPE type flag.
5165 Specific drivers that must be changed:
5167 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
5168 AeGpeHandler, NULL);
5169 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
5170 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
5172 2) Button Drivers (Power, Lid, Sleep):
5173 Run _PRW method under parent device
5174 If _PRW exists: /* This is a control-method button */
5175 Extract GPE number and possibly GpeDevice
5176 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
5177 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
5179 For all other devices that have _PRWs, we automatically set the GPE type to
5180 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
5181 must be done on a selective basis, usually requiring some kind of user app
5182 to allow the user to pick the wake devices.
5185 Code and Data Size: Current and previous core subsystem library sizes are
5186 shown below. These are the code and data sizes for the acpica.lib produced
5187 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5188 any ACPI driver or OSPM code. The debug version of the code includes the
5189 debug output trace mechanism and has a much larger code and data size. Note
5190 that these values will vary depending on the efficiency of the compiler and
5191 the compiler options used during generation.
5194 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5195 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5198 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5199 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5203 ----------------------------------------
5204 02 April 2004. Summary of changes for version 20040402:
5206 1) ACPI CA Core Subsystem:
5208 Fixed an interpreter problem where an indirect store through an ArgX
5209 parameter was incorrectly applying the "implicit conversion rules" during
5210 the store. From the ACPI specification: "If the target is a method local or
5211 argument (LocalX or ArgX), no conversion is performed and the result is
5212 stored directly to the target". The new behavior is to disable implicit
5213 conversion during ALL stores to an ArgX.
5215 Changed the behavior of the _PRW method scan to ignore any and all errors
5216 returned by a given _PRW. This prevents the scan from aborting from the
5217 failure of any single _PRW.
5219 Moved the runtime configuration parameters from the global init procedure to
5220 static variables in acglobal.h. This will allow the host to override the
5221 default values easily.
5223 Code and Data Size: Current and previous core subsystem library sizes are
5224 shown below. These are the code and data sizes for the acpica.lib produced
5225 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5226 any ACPI driver or OSPM code. The debug version of the code includes the
5227 debug output trace mechanism and has a much larger code and data size. Note
5228 that these values will vary depending on the efficiency of the compiler and
5229 the compiler options used during generation.
5232 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5233 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5235 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5236 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5239 2) iASL Compiler/Disassembler:
5241 iASL now fully disassembles SSDTs. However, External() statements are not
5242 generated automatically for unresolved symbols at this time. This is a
5243 planned feature for future implementation.
5245 Fixed a scoping problem in the disassembler that occurs when the type of the
5246 target of a Scope() operator is overridden. This problem caused an
5247 incorrectly nested internal namespace to be constructed.
5249 Any warnings or errors that are emitted during disassembly are now commented
5250 out automatically so that the resulting file can be recompiled without any
5253 ----------------------------------------
5254 26 March 2004. Summary of changes for version 20040326:
5256 1) ACPI CA Core Subsystem:
5258 Implemented support for "wake" GPEs via interaction between GPEs and the
5259 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
5260 identified as a WAKE GPE and by default will no longer be enabled at
5261 runtime. Previously, we were blindly enabling all GPEs with a corresponding
5262 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
5263 believe this has been the cause of thousands of "spurious" GPEs on some
5266 This new GPE behavior is can be reverted to the original behavior (enable
5267 ALL GPEs at runtime) via a runtime flag.
5269 Fixed a problem where aliased control methods could not access objects
5270 properly. The proper scope within the namespace was not initialized
5271 (transferred to the target of the aliased method) before executing the
5274 Fixed a potential race condition on internal object deletion on the return
5275 object in AcpiEvaluateObject.
5277 Integrated a fix for resource descriptors where both _MEM and _MTP were
5278 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5279 wide, 0x0F instead of 0x03.)
5281 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
5282 fault in some cases.
5284 Updated Notify() values for debug statements in evmisc.c
5286 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
5288 Code and Data Size: Current and previous core subsystem library sizes are
5289 shown below. These are the code and data sizes for the acpica.lib produced
5290 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5291 any ACPI driver or OSPM code. The debug version of the code includes the
5292 debug output trace mechanism and has a much larger code and data size. Note
5293 that these values will vary depending on the efficiency of the compiler and
5294 the compiler options used during generation.
5298 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5299 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5301 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5302 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5304 ----------------------------------------
5305 11 March 2004. Summary of changes for version 20040311:
5307 1) ACPI CA Core Subsystem:
5309 Fixed a problem where errors occurring during the parse phase of control
5310 method execution did not abort cleanly. For example, objects created and
5311 installed in the namespace were not deleted. This caused all subsequent
5312 invocations of the method to return the AE_ALREADY_EXISTS exception.
5314 Implemented a mechanism to force a control method to "Serialized" execution
5315 if the method attempts to create namespace objects. (The root of the
5316 AE_ALREADY_EXISTS problem.)
5318 Implemented support for the predefined _OSI "internal" control method.
5319 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
5320 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
5321 This feature will allow "other" operating systems to execute the fully
5322 tested, "Windows" code path through the ASL code
5324 Global Lock Support: Now allows multiple acquires and releases with any
5325 internal thread. Removed concept of "owning thread" for this special mutex.
5327 Fixed two functions that were inappropriately declaring large objects on the
5328 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
5329 method execution considerably.
5331 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
5332 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
5334 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
5335 defined on the machine.
5337 Implemented two runtime options: One to force all control method execution
5338 to "Serialized" to mimic Windows behavior, another to disable _OSI support
5339 if it causes problems on a given machine.
5341 Code and Data Size: Current and previous core subsystem library sizes are
5342 shown below. These are the code and data sizes for the acpica.lib produced
5343 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5344 any ACPI driver or OSPM code. The debug version of the code includes the
5345 debug output trace mechanism and has a much larger code and data size. Note
5346 that these values will vary depending on the efficiency of the compiler and
5347 the compiler options used during generation.
5350 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5351 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5353 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5354 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5356 2) iASL Compiler/Disassembler:
5358 Fixed an array size problem for FreeBSD that would cause the compiler to
5361 ----------------------------------------
5362 20 February 2004. Summary of changes for version 20040220:
5365 1) ACPI CA Core Subsystem:
5367 Implemented execution of _SxD methods for Device objects in the
5368 GetObjectInfo interface.
5370 Fixed calls to _SST method to pass the correct arguments.
5372 Added a call to _SST on wake to restore to "working" state.
5374 Check for End-Of-Buffer failure case in the WalkResources interface.
5376 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
5377 structures to the beginning of the file.
5379 After wake, clear GPE status register(s) before enabling GPEs.
5381 After wake, clear/enable power button. (Perhaps we should clear/enable all
5382 fixed events upon wake.)
5384 Fixed a couple of possible memory leaks in the Namespace manager.
5386 Integrated latest acnetbsd.h file.
5388 ----------------------------------------
5389 11 February 2004. Summary of changes for version 20040211:
5392 1) ACPI CA Core Subsystem:
5394 Completed investigation and implementation of the call-by-reference
5395 mechanism for control method arguments.
5397 Fixed a problem where a store of an object into an indexed package could
5398 fail if the store occurs within a different method than the method that
5399 created the package.
5401 Fixed a problem where the ToDecimal operator could return incorrect results.
5403 Fixed a problem where the CopyObject operator could fail on some of the more
5404 obscure objects (e.g., Reference objects.)
5406 Improved the output of the Debug object to display buffer, package, and
5409 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
5410 the expected result.
5412 Added permanent ACPI_REPORT_ERROR macros for all instances of the
5413 ACPI_AML_INTERNAL exception.
5415 Integrated latest version of acfreebsd.h
5417 ----------------------------------------
5418 16 January 2004. Summary of changes for version 20040116:
5420 The purpose of this release is primarily to update the copyright years in
5421 each module, thus causing a huge number of diffs. There are a few small
5422 functional changes, however.
5424 1) ACPI CA Core Subsystem:
5426 Improved error messages when there is a problem finding one or more of the
5427 required base ACPI tables
5429 Reintroduced the definition of APIC_HEADER in actbl.h
5431 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
5433 Removed extraneous reference to NewObj in dsmthdat.c
5437 Fixed a problem introduced in December that disabled the correct disassembly
5438 of Resource Templates
5441 ----------------------------------------
5442 03 December 2003. Summary of changes for version 20031203:
5444 1) ACPI CA Core Subsystem:
5446 Changed the initialization of Operation Regions during subsystem
5447 init to perform two entire walks of the ACPI namespace; The first
5448 to initialize the regions themselves, the second to execute the
5449 _REG methods. This fixed some interdependencies across _REG
5450 methods found on some machines.
5452 Fixed a problem where a Store(Local0, Local1) could simply update
5453 the object reference count, and not create a new copy of the
5454 object if the Local1 is uninitialized.
5456 Implemented support for the _SST reserved method during sleep
5459 Implemented support to clear the SLP_TYP and SLP_EN bits when
5460 waking up, this is apparently required by some machines.
5462 When sleeping, clear the wake status only if SleepState is not S5.
5464 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
5465 pointer arithmetic advanced a string pointer too far.
5467 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
5468 could be returned if the requested table has not been loaded.
5470 Within the support for IRQ resources, restructured the handling of
5471 the active and edge/level bits.
5473 Fixed a few problems in AcpiPsxExecute() where memory could be
5474 leaked under certain error conditions.
5476 Improved error messages for the cases where the ACPI mode could
5479 Code and Data Size: Current and previous core subsystem library
5480 sizes are shown below. These are the code and data sizes for the
5481 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5482 these values do not include any ACPI driver or OSPM code. The
5483 debug version of the code includes the debug output trace
5484 mechanism and has a much larger code and data size. Note that
5485 these values will vary depending on the efficiency of the compiler
5486 and the compiler options used during generation.
5488 Previous Release (20031029):
5489 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5490 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5492 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5493 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5495 2) iASL Compiler/Disassembler:
5497 Implemented a fix for the iASL disassembler where a bad index was
5498 generated. This was most noticeable on 64-bit platforms
5501 ----------------------------------------
5502 29 October 2003. Summary of changes for version 20031029:
5504 1) ACPI CA Core Subsystem:
5507 Fixed a problem where a level-triggered GPE with an associated
5508 _Lxx control method was incorrectly cleared twice.
5510 Fixed a problem with the Field support code where an access can
5511 occur beyond the end-of-region if the field is non-aligned but
5512 extends to the very end of the parent region (resulted in an
5513 AE_AML_REGION_LIMIT exception.)
5515 Fixed a problem with ACPI Fixed Events where an RT Clock handler
5516 would not get invoked on an RTC event. The RTC event bitmasks for
5517 the PM1 registers were not being initialized properly.
5519 Implemented support for executing _STA and _INI methods for
5520 Processor objects. Although this is currently not part of the
5521 ACPI specification, there is existing ASL code that depends on the
5522 init-time execution of these methods.
5524 Implemented and deployed a GetDescriptorName function to decode
5525 the various types of internal descriptors. Guards against null
5526 descriptors during debug output also.
5528 Implemented and deployed a GetNodeName function to extract the 4-
5529 character namespace node name. This function simplifies the debug
5530 and error output, as well as guarding against null pointers during
5533 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
5534 simplify the debug and error output of 64-bit integers. This
5535 macro replaces the HIDWORD and LODWORD macros for dumping these
5538 Updated the implementation of the Stall() operator to only call
5539 AcpiOsStall(), and also return an error if the operand is larger
5540 than 255. This preserves the required behavior of not
5541 relinquishing the processor, as would happen if AcpiOsSleep() was
5542 called for "long stalls".
5544 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
5545 initialized are now treated as NOOPs.
5547 Cleaned up a handful of warnings during 64-bit generation.
5549 Fixed a reported error where and incorrect GPE number was passed
5550 to the GPE dispatch handler. This value is only used for error
5551 output, however. Used this opportunity to clean up and streamline
5552 the GPE dispatch code.
5554 Code and Data Size: Current and previous core subsystem library
5555 sizes are shown below. These are the code and data sizes for the
5556 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5557 these values do not include any ACPI driver or OSPM code. The
5559 debug version of the code includes the debug output trace
5560 mechanism and has a much larger code and data size. Note that
5561 these values will vary depending on the efficiency of the compiler
5562 and the compiler options used during generation.
5564 Previous Release (20031002):
5565 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5566 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5568 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5569 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5572 2) iASL Compiler/Disassembler:
5574 Updated the iASL compiler to return an error if the operand to the
5575 Stall() operator is larger than 255.
5578 ----------------------------------------
5579 02 October 2003. Summary of changes for version 20031002:
5582 1) ACPI CA Core Subsystem:
5584 Fixed a problem with Index Fields where the index was not
5585 incremented for fields that require multiple writes to the
5586 index/data registers (Fields that are wider than the data
5589 Fixed a problem with all Field objects where a write could go
5590 beyond the end-of-field if the field was larger than the access
5591 granularity and therefore required multiple writes to complete the
5592 request. An extra write beyond the end of the field could happen
5595 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
5596 would incorrectly be returned if the width of the Data Register
5597 was larger than the specified field access width.
5599 Completed fixes for LoadTable() and Unload() and verified their
5600 operation. Implemented full support for the "DdbHandle" object
5601 throughout the ACPI CA subsystem.
5603 Implemented full support for the MADT and ECDT tables in the ACPI
5604 CA header files. Even though these tables are not directly
5605 consumed by ACPI CA, the header definitions are useful for ACPI
5608 Integrated resource descriptor fixes posted to the Linux ACPI
5609 list. This included checks for minimum descriptor length, and
5610 support for trailing NULL strings within descriptors that have
5611 optional string elements.
5613 Code and Data Size: Current and previous core subsystem library
5614 sizes are shown below. These are the code and data sizes for the
5615 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5616 these values do not include any ACPI driver or OSPM code. The
5617 debug version of the code includes the debug output trace
5618 mechanism and has a much larger code and data size. Note that
5619 these values will vary depending on the efficiency of the compiler
5620 and the compiler options used during generation.
5622 Previous Release (20030918):
5623 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5624 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5626 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5627 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5632 Implemented detection of non-ASCII characters within the input
5633 source ASL file. This catches attempts to compile binary (AML)
5634 files early in the compile, with an informative error message.
5636 Fixed a problem where the disassembler would fault if the output
5637 filename could not be generated or if the output file could not be
5640 ----------------------------------------
5641 18 September 2003. Summary of changes for version 20030918:
5644 1) ACPI CA Core Subsystem:
5646 Found and fixed a longstanding problem with the late execution of
5647 the various deferred AML opcodes (such as Operation Regions,
5648 Buffer Fields, Buffers, and Packages). If the name string
5649 specified for the name of the new object placed the object in a
5650 scope other than the current scope, the initialization/execution
5651 of the opcode failed. The solution to this problem was to
5652 implement a mechanism where the late execution of such opcodes
5653 does not attempt to lookup/create the name a second time in an
5654 incorrect scope. This fixes the "region size computed
5655 incorrectly" problem.
5657 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
5658 Global Lock AE_BAD_PARAMETER error.
5660 Fixed several 64-bit issues with prototypes, casting and data
5663 Removed duplicate prototype from acdisasm.h
5665 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
5667 Code and Data Size: Current and previous core subsystem library
5668 sizes are shown below. These are the code and data sizes for the
5669 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5670 these values do not include any ACPI driver or OSPM code. The
5671 debug version of the code includes the debug output trace
5672 mechanism and has a much larger code and data size. Note that
5673 these values will vary depending on the efficiency of the compiler
5674 and the compiler options used during generation.
5678 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5679 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5681 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5682 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5687 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
5688 correct sleep time in seconds.
5690 ----------------------------------------
5691 14 July 2003. Summary of changes for version 20030619:
5693 1) ACPI CA Core Subsystem:
5695 Parse SSDTs in order discovered, as opposed to reverse order
5698 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
5705 Dynamically allocate SDT list (suggested by Andi Kleen)
5707 proc function return value cleanups (Andi Kleen)
5709 Correctly handle NMI watchdog during long stalls (Andrew Morton)
5711 Make it so acpismp=force works (reported by Andrew Morton)
5714 ----------------------------------------
5715 19 June 2003. Summary of changes for version 20030619:
5717 1) ACPI CA Core Subsystem:
5719 Fix To/FromBCD, eliminating the need for an arch-specific #define.
5721 Do not acquire a semaphore in the S5 shutdown path.
5723 Fix ex_digits_needed for 0. (Takayoshi Kochi)
5725 Fix sleep/stall code reversal. (Andi Kleen)
5727 Revert a change having to do with control method calling
5732 acpiphp update (Takayoshi Kochi)
5734 Export acpi_disabled for sonypi (Stelian Pop)
5736 Mention acpismp=force in config help
5738 Re-add acpitable.c and acpismp=force. This improves backwards
5740 compatibility and also cleans up the code to a significant degree.
5742 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
5744 ----------------------------------------
5745 22 May 2003. Summary of changes for version 20030522:
5747 1) ACPI CA Core Subsystem:
5749 Found and fixed a reported problem where an AE_NOT_FOUND error
5750 occurred occasionally during _BST evaluation. This turned out to
5751 be an Owner ID allocation issue where a called method did not get
5752 a new ID assigned to it. Eventually, (after 64k calls), the Owner
5753 ID UINT16 would wraparound so that the ID would be the same as the
5754 caller's and the called method would delete the caller's
5757 Implemented extended error reporting for control methods that are
5758 aborted due to a run-time exception. Output includes the exact
5759 AML instruction that caused the method abort, a dump of the method
5760 locals and arguments at the time of the abort, and a trace of all
5761 nested control method calls.
5763 Modified the interpreter to allow the creation of buffers of zero
5764 length from the AML code. Implemented new code to ensure that no
5765 attempt is made to actually allocate a memory buffer (of length
5766 zero) - instead, a simple buffer object with a NULL buffer pointer
5767 and length zero is created. A warning is no longer issued when
5768 the AML attempts to create a zero-length buffer.
5770 Implemented a workaround for the "leading asterisk issue" in
5771 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
5772 asterisk is automatically removed if present in any HID, UID, or
5773 CID strings. The iASL compiler will still flag this asterisk as
5776 Implemented full support for _CID methods that return a package of
5777 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
5778 now additionally returns a device _CID list if present. This
5779 required a change to the external interface in order to pass an
5780 ACPI_BUFFER object as a parameter since the _CID list is of
5783 Fixed a problem with the new AE_SAME_HANDLER exception where
5784 handler initialization code did not know about this exception.
5786 Code and Data Size: Current and previous core subsystem library
5787 sizes are shown below. These are the code and data sizes for the
5788 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5789 these values do not include any ACPI driver or OSPM code. The
5790 debug version of the code includes the debug output trace
5791 mechanism and has a much larger code and data size. Note that
5792 these values will vary depending on the efficiency of the compiler
5793 and the compiler options used during generation.
5795 Previous Release (20030509):
5796 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5797 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5799 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5800 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5805 Fixed a bug in which we would reinitialize the ACPI interrupt
5806 after it was already working, thus disabling all ACPI and the IRQs
5807 for any other device sharing the interrupt. (Thanks to Stian
5810 Toshiba driver update (John Belmonte)
5812 Return only 0 or 1 for our interrupt handler status (Andrew
5818 Fixed a reported problem where multiple (nested) ElseIf()
5819 statements were not handled correctly by the compiler, resulting
5820 in incorrect warnings and incorrect AML code. This was a problem
5821 in both the ASL parser and the code generator.
5826 Added changes to existing interfaces, new exception codes, and new
5827 text concerning reference count object management versus garbage
5830 ----------------------------------------
5831 09 May 2003. Summary of changes for version 20030509.
5834 1) ACPI CA Core Subsystem:
5836 Changed the subsystem initialization sequence to hold off
5837 installation of address space handlers until the hardware has been
5838 initialized and the system has entered ACPI mode. This is because
5839 the installation of space handlers can cause _REG methods to be
5840 run. Previously, the _REG methods could potentially be run before
5841 ACPI mode was enabled.
5843 Fixed some memory leak issues related to address space handler and
5844 notify handler installation. There were some problems with the
5845 reference count mechanism caused by the fact that the handler
5846 objects are shared across several namespace objects.
5848 Fixed a reported problem where reference counts within the
5849 namespace were not properly updated when named objects created by
5850 method execution were deleted.
5852 Fixed a reported problem where multiple SSDTs caused a deletion
5853 issue during subsystem termination. Restructured the table data
5854 structures to simplify the linked lists and the related code.
5856 Fixed a problem where the table ID associated with secondary
5857 tables (SSDTs) was not being propagated into the namespace objects
5858 created by those tables. This would only present a problem for
5859 tables that are unloaded at run-time, however.
5861 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
5862 type as the length parameter (instead of UINT32).
5864 Solved a long-standing problem where an ALREADY_EXISTS error
5865 appears on various systems. This problem could happen when there
5866 are multiple PCI_Config operation regions under a single PCI root
5867 bus. This doesn't happen very frequently, but there are some
5868 systems that do this in the ASL.
5870 Fixed a reported problem where the internal DeleteNode function
5871 was incorrectly handling the case where a namespace node was the
5872 first in the parent's child list, and had additional peers (not
5873 the only child, but first in the list of children.)
5875 Code and Data Size: Current core subsystem library sizes are shown
5876 below. These are the code and data sizes for the acpica.lib
5877 produced by the Microsoft Visual C++ 6.0 compiler, and these
5878 values do not include any ACPI driver or OSPM code. The debug
5879 version of the code includes the debug output trace mechanism and
5880 has a much larger code and data size. Note that these values will
5881 vary depending on the efficiency of the compiler and the compiler
5882 options used during generation.
5885 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
5886 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
5888 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5889 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5894 Allow ":" in OS override string (Ducrot Bruno)
5896 Kobject fix (Greg KH)
5899 3 iASL Compiler/Disassembler:
5901 Fixed a problem in the generation of the C source code files (AML
5902 is emitted in C source statements for BIOS inclusion) where the
5903 Ascii dump that appears within a C comment at the end of each line
5904 could cause a compile time error if the AML sequence happens to
5905 have an open comment or close comment sequence embedded.
5908 ----------------------------------------
5909 24 April 2003. Summary of changes for version 20030424.
5912 1) ACPI CA Core Subsystem:
5914 Support for big-endian systems has been implemented. Most of the
5915 support has been invisibly added behind big-endian versions of the
5918 Fixed a problem in AcpiHwDisableGpeBlock() and
5919 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
5920 low level hardware write routine. The offset parameter was
5921 actually eliminated from the low level read/write routines because
5922 they had become obsolete.
5924 Fixed a problem where a handler object was deleted twice during
5925 the removal of a fixed event handler.
5930 A fix for SMP systems with link devices was contributed by
5934 (2.5) Return whether we handled the interrupt in our IRQ handler.
5935 (Linux ISRs no longer return void, so we can propagate the handler
5936 return value from the ACPI CA core back to the OS.)
5942 The ACPI CA Programmer Reference has been updated to reflect new
5943 interfaces and changes to existing interfaces.
5945 ----------------------------------------
5946 28 March 2003. Summary of changes for version 20030328.
5948 1) ACPI CA Core Subsystem:
5950 The GPE Block Device support has been completed. New interfaces
5951 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
5952 interfaces (enable, disable, clear, getstatus) have been split
5953 into separate interfaces for Fixed Events and General Purpose
5954 Events (GPEs) in order to support GPE Block Devices properly.
5956 Fixed a problem where the error message "Failed to acquire
5957 semaphore" would appear during operations on the embedded
5960 Code and Data Size: Current core subsystem library sizes are shown
5961 below. These are the code and data sizes for the acpica.lib
5962 produced by the Microsoft Visual C++ 6.0 compiler, and these
5963 values do not include any ACPI driver or OSPM code. The debug
5964 version of the code includes the debug output trace mechanism and
5965 has a much larger code and data size. Note that these values will
5966 vary depending on the efficiency of the compiler and the compiler
5967 options used during generation.
5970 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
5971 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
5973 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
5974 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
5977 ----------------------------------------
5978 28 February 2003. Summary of changes for version 20030228.
5981 1) ACPI CA Core Subsystem:
5983 The GPE handling and dispatch code has been completely overhauled
5984 in preparation for support of GPE Block Devices (ID ACPI0006).
5985 This affects internal data structures and code only; there should
5986 be no differences visible externally. One new file has been
5989 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
5990 fields that are used to determine the GPE block lengths. The
5991 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
5992 structures are ignored. This is per the ACPI specification but it
5993 isn't very clear. The full 256 Block 0/1 GPEs are now supported
5994 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
5996 In the SCI interrupt handler, removed the read of the PM1_CONTROL
5997 register to look at the SCI_EN bit. On some machines, this read
5998 causes an SMI event and greatly slows down SCI events. (This may
5999 in fact be the cause of slow battery status response on some
6002 Fixed a problem where a store of a NULL string to a package object
6003 could cause the premature deletion of the object. This was seen
6004 during execution of the battery _BIF method on some systems,
6005 resulting in no battery data being returned.
6007 Added AcpiWalkResources interface to simplify parsing of resource
6010 Code and Data Size: Current core subsystem library sizes are shown
6011 below. These are the code and data sizes for the acpica.lib
6012 produced by the Microsoft Visual C++ 6.0 compiler, and these
6013 values do not include any ACPI driver or OSPM code. The debug
6014 version of the code includes the debug output trace mechanism and
6015 has a much larger code and data size. Note that these values will
6016 vary depending on the efficiency of the compiler and the compiler
6017 options used during generation.
6020 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6021 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6023 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6024 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6029 S3 fixes (Ole Rohne)
6031 Update ACPI PHP driver with to use new acpi_walk_resource API
6034 Add S4BIOS support (Pavel Machek)
6036 Map in entire table before performing checksum (John Stultz)
6038 Expand the mem= cmdline to allow the specification of reserved and
6039 ACPI DATA blocks (Pavel Machek)
6041 Never use ACPI on VISWS
6043 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
6045 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
6046 causing us to think that some systems support C2 when they really
6049 Do not count processor objects for non-present CPUs (Thanks to
6055 Fixed a problem where ASL include files could not be found and
6058 Added support for the _PDC reserved name.
6061 ----------------------------------------
6062 22 January 2003. Summary of changes for version 20030122.
6065 1) ACPI CA Core Subsystem:
6067 Added a check for constructs of the form: Store (Local0, Local0)
6068 where Local0 is not initialized. Apparently, some BIOS
6069 programmers believe that this is a NOOP. Since this store doesn't
6070 do anything anyway, the new prototype behavior will ignore this
6071 error. This is a case where we can relax the strict checking in
6072 the interpreter in the name of compatibility.
6077 The AcpiSrc Source Conversion Utility has been released with the
6078 Linux package for the first time. This is the utility that is
6079 used to convert the ACPI CA base source code to the Linux version.
6081 (Both) Handle P_BLK lengths shorter than 6 more gracefully
6083 (Both) Move more headers to include/acpi, and delete an unused
6086 (Both) Move drivers/acpi/include directory to include/acpi
6088 (Both) Boot functions don't use cmdline, so don't pass it around
6090 (Both) Remove include of unused header (Adrian Bunk)
6092 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
6094 former now also includes the latter, acpiphp.h only needs the one,
6097 (2.5) Make it possible to select method of bios restoring after S3
6098 resume. [=> no more ugly ifdefs] (Pavel Machek)
6100 (2.5) Make proc write interfaces work (Pavel Machek)
6102 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
6104 (2.5) Break out ACPI Perf code into its own module, under cpufreq
6107 (2.4) S4BIOS support (Ducrot Bruno)
6109 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
6115 Added support to disassemble SSDT and PSDTs.
6117 Implemented support to obtain SSDTs from the Windows registry if
6121 ----------------------------------------
6122 09 January 2003. Summary of changes for version 20030109.
6124 1) ACPI CA Core Subsystem:
6126 Changed the behavior of the internal Buffer-to-String conversion
6127 function. The current ACPI specification states that the contents
6128 of the buffer are "converted to a string of two-character
6129 hexadecimal numbers, each separated by a space". Unfortunately,
6130 this definition is not backwards compatible with existing ACPI 1.0
6131 implementations (although the behavior was not defined in the ACPI
6132 1.0 specification). The new behavior simply copies data from the
6133 buffer to the string until a null character is found or the end of
6134 the buffer is reached. The new String object is always null
6135 terminated. This problem was seen during the generation of _BIF
6136 battery data where incorrect strings were returned for battery
6137 type, etc. This will also require an errata to the ACPI
6140 Renamed all instances of NATIVE_UINT and NATIVE_INT to
6141 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
6143 Copyright in all module headers (both Linux and non-Linux) has be
6146 Code and Data Size: Current core subsystem library sizes are shown
6147 below. These are the code and data sizes for the acpica.lib
6148 produced by the Microsoft Visual C++ 6.0 compiler, and these
6149 values do not include any ACPI driver or OSPM code. The debug
6150 version of the code includes the debug output trace mechanism and
6151 has a much larger code and data size. Note that these values will
6152 vary depending on the efficiency of the compiler and the compiler
6153 options used during generation.
6156 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6157 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6159 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6160 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6165 Fixed an oops on module insertion/removal (Matthew Tippett)
6167 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
6169 (2.5) Replace pr_debug (Randy Dunlap)
6171 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
6173 (Both) Eliminate spawning of thread from timer callback, in favor
6176 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
6178 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
6180 (Both) Add missing statics to button.c (Pavel Machek)
6182 Several changes have been made to the source code translation
6183 utility that generates the Linux Code in order to make the code
6186 All typedefs on structs and unions have been removed in keeping
6187 with the Linux coding style.
6189 Removed the non-Linux SourceSafe module revision number from each
6192 Completed major overhaul of symbols to be lowercased for linux.
6193 Doubled the number of symbols that are lowercased.
6195 Fixed a problem where identifiers within procedure headers and
6196 within quotes were not fully lower cased (they were left with a
6199 Some C macros whose only purpose is to allow the generation of 16-
6200 bit code are now completely removed in the Linux code, increasing
6201 readability and maintainability.
6203 ----------------------------------------
6205 12 December 2002. Summary of changes for version 20021212.
6208 1) ACPI CA Core Subsystem:
6210 Fixed a problem where the creation of a zero-length AML Buffer
6211 would cause a fault.
6213 Fixed a problem where a Buffer object that pointed to a static AML
6214 buffer (in an ACPI table) could inadvertently be deleted, causing
6217 Fixed a problem where a user buffer (passed in to the external
6218 ACPI CA interfaces) could be overwritten if the buffer was too
6219 small to complete the operation, causing memory corruption.
6221 Fixed a problem in the Buffer-to-String conversion code where a
6222 string of length one was always returned, regardless of the size
6223 of the input Buffer object.
6225 Removed the NATIVE_CHAR data type across the entire source due to
6226 lack of need and lack of consistent use.
6228 Code and Data Size: Current core subsystem library sizes are shown
6229 below. These are the code and data sizes for the acpica.lib
6230 produced by the Microsoft Visual C++ 6.0 compiler, and these
6231 values do not include any ACPI driver or OSPM code. The debug
6232 version of the code includes the debug output trace mechanism and
6233 has a much larger code and data size. Note that these values will
6234 vary depending on the efficiency of the compiler and the compiler
6235 options used during generation.
6238 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6239 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6241 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6242 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6245 ----------------------------------------
6246 05 December 2002. Summary of changes for version 20021205.
6248 1) ACPI CA Core Subsystem:
6250 Fixed a problem where a store to a String or Buffer object could
6251 cause corruption of the DSDT if the object type being stored was
6252 the same as the target object type and the length of the object
6253 being stored was equal to or smaller than the original (existing)
6254 target object. This was seen to cause corruption of battery _BIF
6255 buffers if the _BIF method modified the buffer on the fly.
6257 Fixed a problem where an internal error was generated if a control
6258 method invocation was used in an OperationRegion, Buffer, or
6259 Package declaration. This was caused by the deferred parsing of
6260 the control method and thus the deferred creation of the internal
6261 method object. The solution to this problem was to create the
6262 internal method object at the moment the method is encountered in
6263 the first pass - so that subsequent references to the method will
6264 able to obtain the required parameter count and thus properly
6265 parse the method invocation. This problem presented itself as an
6266 AE_AML_INTERNAL during the pass 1 parse phase during table load.
6268 Fixed a problem where the internal String object copy routine did
6269 not always allocate sufficient memory for the target String object
6270 and caused memory corruption. This problem was seen to cause
6271 "Allocation already present in list!" errors as memory allocation
6274 Implemented a new function for the evaluation of namespace objects
6275 that allows the specification of the allowable return object
6276 types. This simplifies a lot of code that checks for a return
6277 object of one or more specific objects returned from the
6278 evaluation (such as _STA, etc.) This may become and external
6279 function if it would be useful to ACPI-related drivers.
6281 Completed another round of prefixing #defines with "ACPI_" for
6284 Completed additional code restructuring to allow more modular
6285 linking for iASL compiler and AcpiExec. Several files were split
6286 creating new files. New files: nsparse.c dsinit.c evgpe.c
6288 Implemented an abort mechanism to terminate an executing control
6289 method via the AML debugger. This feature is useful for debugging
6290 control methods that depend (wait) for specific hardware
6293 Code and Data Size: Current core subsystem library sizes are shown
6294 below. These are the code and data sizes for the acpica.lib
6295 produced by the Microsoft Visual C++ 6.0 compiler, and these
6296 values do not include any ACPI driver or OSPM code. The debug
6297 version of the code includes the debug output trace mechanism and
6298 has a much larger code and data size. Note that these values will
6299 vary depending on the efficiency of the compiler and the compiler
6300 options used during generation.
6303 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6304 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6306 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6307 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6310 2) iASL Compiler/Disassembler
6312 Fixed a compiler code generation problem for "Interrupt" Resource
6313 Descriptors. If specified in the ASL, the optional "Resource
6314 Source Index" and "Resource Source" fields were not inserted into
6315 the correct location within the AML resource descriptor, creating
6316 an invalid descriptor.
6318 Fixed a disassembler problem for "Interrupt" resource descriptors.
6319 The optional "Resource Source Index" and "Resource Source" fields
6323 ----------------------------------------
6324 22 November 2002. Summary of changes for version 20021122.
6327 1) ACPI CA Core Subsystem:
6329 Fixed a reported problem where an object stored to a Method Local
6330 or Arg was not copied to a new object during the store - the
6331 object pointer was simply copied to the Local/Arg. This caused
6332 all subsequent operations on the Local/Arg to also affect the
6333 original source of the store operation.
6335 Fixed a problem where a store operation to a Method Local or Arg
6336 was not completed properly if the Local/Arg contained a reference
6337 (from RefOf) to a named field. The general-purpose store-to-
6338 namespace-node code is now used so that this case is handled
6341 Fixed a problem where the internal object copy routine would cause
6342 a protection fault if the object being copied was a Package and
6343 contained either 1) a NULL package element or 2) a nested sub-
6346 Fixed a problem with the GPE initialization that resulted from an
6347 ambiguity in the ACPI specification. One section of the
6348 specification states that both the address and length of the GPE
6349 block must be zero if the block is not supported. Another section
6350 implies that only the address need be zero if the block is not
6351 supported. The code has been changed so that both the address and
6352 the length must be non-zero to indicate a valid GPE block (i.e.,
6353 if either the address or the length is zero, the GPE block is
6356 Code and Data Size: Current core subsystem library sizes are shown
6357 below. These are the code and data sizes for the acpica.lib
6358 produced by the Microsoft Visual C++ 6.0 compiler, and these
6359 values do not include any ACPI driver or OSPM code. The debug
6360 version of the code includes the debug output trace mechanism and
6361 has a much larger code and data size. Note that these values will
6362 vary depending on the efficiency of the compiler and the compiler
6363 options used during generation.
6366 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6367 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6369 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6370 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6375 Cleaned up EC driver. Exported an external EC read/write
6376 interface. By going through this, other drivers (most notably
6377 sonypi) will be able to serialize access to the EC.
6380 3) iASL Compiler/Disassembler
6382 Implemented support to optionally generate include files for both
6383 ASM and C (the -i switch). This simplifies BIOS development by
6384 automatically creating include files that contain external
6385 declarations for the symbols that are created within the
6387 (optionally generated) ASM and C AML source files.
6390 ----------------------------------------
6391 15 November 2002. Summary of changes for version 20021115.
6393 1) ACPI CA Core Subsystem:
6395 Fixed a memory leak problem where an error during resolution of
6397 method arguments during a method invocation from another method
6398 failed to cleanup properly by deleting all successfully resolved
6401 Fixed a problem where the target of the Index() operator was not
6402 correctly constructed if the source object was a package. This
6403 problem has not been detected because the use of a target operand
6404 with Index() is very rare.
6406 Fixed a problem with the Index() operator where an attempt was
6407 made to delete the operand objects twice.
6409 Fixed a problem where an attempt was made to delete an operand
6410 twice during execution of the CondRefOf() operator if the target
6413 Implemented the first of perhaps several internal create object
6414 functions that create and initialize a specific object type. This
6415 consolidates duplicated code wherever the object is created, thus
6416 shrinking the size of the subsystem.
6418 Implemented improved debug/error messages for errors that occur
6419 during nested method invocations. All executing method pathnames
6420 are displayed (with the error) as the call stack is unwound - thus
6423 Fixed a problem introduced in the 10/02 release that caused
6424 premature deletion of a buffer object if a buffer was used as an
6425 ASL operand where an integer operand is required (Thus causing an
6426 implicit object conversion from Buffer to Integer.) The change in
6427 the 10/02 release was attempting to fix a memory leak (albeit
6430 Code and Data Size: Current core subsystem library sizes are shown
6431 below. These are the code and data sizes for the acpica.lib
6432 produced by the Microsoft Visual C++ 6.0 compiler, and these
6433 values do not include any ACPI driver or OSPM code. The debug
6434 version of the code includes the debug output trace mechanism and
6435 has a much larger code and data size. Note that these values will
6436 vary depending on the efficiency of the compiler and the compiler
6437 options used during generation.
6440 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6441 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6443 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6444 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6449 Changed the implementation of the ACPI semaphores to use down()
6450 instead of down_interruptable(). It is important that the
6451 execution of ACPI control methods not be interrupted by signals.
6452 Methods must run to completion, or the system may be left in an
6453 unknown/unstable state.
6455 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
6459 3) iASL Compiler/Disassembler
6462 Changed the default location of output files. All output files
6463 are now placed in the current directory by default instead of in
6464 the directory of the source file. This change may affect some
6465 existing makefiles, but it brings the behavior of the compiler in
6466 line with other similar tools. The location of the output files
6467 can be overridden with the -p command line switch.
6470 ----------------------------------------
6471 11 November 2002. Summary of changes for version 20021111.
6474 0) ACPI Specification 2.0B is released and is now available at:
6475 http://www.acpi.info/index.html
6478 1) ACPI CA Core Subsystem:
6480 Implemented support for the ACPI 2.0 SMBus Operation Regions.
6481 This includes the early detection and handoff of the request to
6482 the SMBus region handler (avoiding all of the complex field
6483 support code), and support for the bidirectional return packet
6484 from an SMBus write operation. This paves the way for the
6485 development of SMBus drivers in each host operating system.
6487 Fixed a problem where the semaphore WAIT_FOREVER constant was
6488 defined as 32 bits, but must be 16 bits according to the ACPI
6489 specification. This had the side effect of causing ASL
6490 Mutex/Event timeouts even though the ASL code requested a wait
6491 forever. Changed all internal references to the ACPI timeout
6492 parameter to 16 bits to prevent future problems. Changed the name
6493 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
6495 Code and Data Size: Current core subsystem library sizes are shown
6496 below. These are the code and data sizes for the acpica.lib
6497 produced by the Microsoft Visual C++ 6.0 compiler, and these
6498 values do not include any ACPI driver or OSPM code. The debug
6499 version of the code includes the debug output trace mechanism and
6500 has a much larger code and data size. Note that these values will
6501 vary depending on the efficiency of the compiler and the compiler
6502 options used during generation.
6505 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6506 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6508 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6509 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6514 Module loading/unloading fixes (John Cagle)
6517 3) iASL Compiler/Disassembler
6519 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
6521 Implemented support for the disassembly of all SMBus protocol
6522 keywords (SMBQuick, SMBWord, etc.)
6524 ----------------------------------------
6525 01 November 2002. Summary of changes for version 20021101.
6528 1) ACPI CA Core Subsystem:
6530 Fixed a problem where platforms that have a GPE1 block but no GPE0
6531 block were not handled correctly. This resulted in a "GPE
6532 overlap" error message. GPE0 is no longer required.
6534 Removed code added in the previous release that inserted nodes
6535 into the namespace in alphabetical order. This caused some side-
6536 effects on various machines. The root cause of the problem is
6537 still under investigation since in theory, the internal ordering
6538 of the namespace nodes should not matter.
6541 Enhanced error reporting for the case where a named object is not
6542 found during control method execution. The full ACPI namepath
6543 (name reference) of the object that was not found is displayed in
6546 Note: as a result of the overhaul of the namespace object types in
6547 the previous release, the namespace nodes for the predefined
6548 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
6549 instead of ACPI_TYPE_ANY. This simplifies the namespace
6550 management code but may affect code that walks the namespace tree
6551 looking for specific object types.
6553 Code and Data Size: Current core subsystem library sizes are shown
6554 below. These are the code and data sizes for the acpica.lib
6555 produced by the Microsoft Visual C++ 6.0 compiler, and these
6556 values do not include any ACPI driver or OSPM code. The debug
6557 version of the code includes the debug output trace mechanism and
6558 has a much larger code and data size. Note that these values will
6559 vary depending on the efficiency of the compiler and the compiler
6560 options used during generation.
6563 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6564 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6566 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6567 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6572 Fixed a problem introduced in the previous release where the
6573 Processor and Thermal objects were not recognized and installed in
6574 /proc. This was related to the scope type change described above.
6577 3) iASL Compiler/Disassembler
6579 Implemented the -g option to get all of the required ACPI tables
6580 from the registry and save them to files (Windows version of the
6581 compiler only.) The required tables are the FADT, FACS, and DSDT.
6583 Added ACPI table checksum validation during table disassembly in
6584 order to catch corrupted tables.
6587 ----------------------------------------
6588 22 October 2002. Summary of changes for version 20021022.
6590 1) ACPI CA Core Subsystem:
6592 Implemented a restriction on the Scope operator that the target
6593 must already exist in the namespace at the time the operator is
6594 encountered (during table load or method execution). In other
6595 words, forward references are not allowed and Scope() cannot
6596 create a new object. This changes the previous behavior where the
6597 interpreter would create the name if not found. This new behavior
6598 correctly enables the search-to-root algorithm during namespace
6599 lookup of the target name. Because of this upsearch, this fixes
6600 the known Compaq _SB_.OKEC problem and makes both the AML
6601 interpreter and iASL compiler compatible with other ACPI
6604 Completed a major overhaul of the internal ACPI object types for
6605 the ACPI Namespace and the associated operand objects. Many of
6606 these types had become obsolete with the introduction of the two-
6607 pass namespace load. This cleanup simplifies the code and makes
6608 the entire namespace load mechanism much clearer and easier to
6611 Improved debug output for tracking scope opening/closing to help
6612 diagnose scoping issues. The old scope name as well as the new
6613 scope name are displayed. Also improved error messages for
6614 problems with ASL Mutex objects and error messages for GPE
6617 Cleaned up the namespace dump code, removed obsolete code.
6619 All string output (for all namespace/object dumps) now uses the
6620 common ACPI string output procedure which handles escapes properly
6621 and does not emit non-printable characters.
6623 Fixed some issues with constants in the 64-bit version of the
6624 local C library (utclib.c)
6629 EC Driver: No longer attempts to acquire the Global Lock at
6633 3) iASL Compiler/Disassembler
6635 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
6636 2 opcodes outside of a control method. This means that the
6637 "executable" operators (versus the "namespace" operators) cannot
6638 be used at the table level; they can only be used within a control
6641 Implemented the restriction on the Scope() operator where the
6642 target must already exist in the namespace at the time the
6643 operator is encountered (during ASL compilation). In other words,
6644 forward references are not allowed and Scope() cannot create a new
6645 object. This makes the iASL compiler compatible with other ACPI
6646 implementations and makes the Scope() implementation adhere to the
6649 Fixed a problem where namepath optimization for the Alias operator
6650 was optimizing the wrong path (of the two namepaths.) This caused
6651 a "Missing alias link" error message.
6653 Fixed a problem where an "unknown reserved name" warning could be
6654 incorrectly generated for names like "_SB" when the trailing
6655 underscore is not used in the original ASL.
6657 Fixed a problem where the reserved name check did not handle
6658 NamePaths with multiple NameSegs correctly. The first nameseg of
6659 the NamePath was examined instead of the last NameSeg.
6662 ----------------------------------------
6664 02 October 2002. Summary of changes for this release.
6667 1) ACPI CA Core Subsystem version 20021002:
6669 Fixed a problem where a store/copy of a string to an existing
6670 string did not always set the string length properly in the String
6673 Fixed a reported problem with the ToString operator where the
6674 behavior was identical to the ToHexString operator instead of just
6675 simply converting a raw buffer to a string data type.
6677 Fixed a problem where CopyObject and the other "explicit"
6678 conversion operators were not updating the internal namespace node
6679 type as part of the store operation.
6681 Fixed a memory leak during implicit source operand conversion
6682 where the original object was not deleted if it was converted to a
6683 new object of a different type.
6685 Enhanced error messages for all problems associated with namespace
6686 lookups. Common procedure generates and prints the lookup name as
6687 well as the formatted status.
6689 Completed implementation of a new design for the Alias support
6690 within the namespace. The existing design did not handle the case
6691 where a new object was assigned to one of the two names due to the
6692 use of an explicit conversion operator, resulting in the two names
6693 pointing to two different objects. The new design simply points
6694 the Alias name to the original name node - not to the object.
6695 This results in a level of indirection that must be handled in the
6696 name resolution mechanism.
6698 Code and Data Size: Current core subsystem library sizes are shown
6699 below. These are the code and data sizes for the acpica.lib
6700 produced by the Microsoft Visual C++ 6.0 compiler, and these
6701 values do not include any ACPI driver or OSPM code. The debug
6702 version of the code includes the debug output trace mechanism and
6703 has a larger code and data size. Note that these values will vary
6704 depending on the efficiency of the compiler and the compiler
6705 options used during generation.
6708 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6709 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6711 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6712 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6717 Initialize thermal driver's timer before it is used. (Knut
6720 Allow handling negative celsius values. (Kochi Takayoshi)
6722 Fix thermal management and make trip points. R/W (Pavel Machek)
6724 Fix /proc/acpi/sleep. (P. Christeas)
6726 IA64 fixes. (David Mosberger)
6728 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
6730 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
6734 3) iASL Compiler/Disassembler
6736 Clarified some warning/error messages.
6739 ----------------------------------------
6740 18 September 2002. Summary of changes for this release.
6743 1) ACPI CA Core Subsystem version 20020918:
6745 Fixed a reported problem with reference chaining (via the Index()
6746 and RefOf() operators) in the ObjectType() and SizeOf() operators.
6747 The definition of these operators includes the dereferencing of
6748 all chained references to return information on the base object.
6750 Fixed a problem with stores to indexed package elements - the
6751 existing code would not complete the store if an "implicit
6752 conversion" was not performed. In other words, if the existing
6753 object (package element) was to be replaced completely, the code
6754 didn't handle this case.
6756 Relaxed typechecking on the ASL "Scope" operator to allow the
6757 target name to refer to an object of type Integer, String, or
6758 Buffer, in addition to the scoping object types (Device,
6759 predefined Scopes, Processor, PowerResource, and ThermalZone.)
6760 This allows existing AML code that has workarounds for a bug in
6761 Windows to function properly. A warning is issued, however. This
6762 affects both the AML interpreter and the iASL compiler. Below is
6763 an example of this type of ASL code:
6769 Fixed some reported problems with 64-bit integer support in the
6770 local implementation of C library functions (clib.c)
6775 Use ACPI fix map region instead of IOAPIC region, since it is
6776 undefined in non-SMP.
6778 Ensure that the SCI has the proper polarity and trigger, even on
6779 systems that do not have an interrupt override entry in the MADT.
6781 2.5 big driver reorganization (Pat Mochel)
6783 Use early table mapping code from acpitable.c (Andi Kleen)
6785 New blacklist entries (Andi Kleen)
6787 Blacklist improvements. Split blacklist code out into a separate
6788 file. Move checking the blacklist to very early. Previously, we
6789 would use ACPI tables, and then halfway through init, check the
6790 blacklist -- too late. Now, it's early enough to completely fall-
6794 3) iASL Compiler/Disassembler version 20020918:
6796 Fixed a problem where the typechecking code didn't know that an
6797 alias could point to a method. In other words, aliases were not
6798 being dereferenced during typechecking.
6801 ----------------------------------------
6802 29 August 2002. Summary of changes for this release.
6804 1) ACPI CA Core Subsystem Version 20020829:
6806 If the target of a Scope() operator already exists, it must be an
6807 object type that actually opens a scope -- such as a Device,
6808 Method, Scope, etc. This is a fatal runtime error. Similar error
6809 check has been added to the iASL compiler also.
6811 Tightened up the namespace load to disallow multiple names in the
6812 same scope. This previously was allowed if both objects were of
6813 the same type. (i.e., a lookup was the same as entering a new
6819 Ensure that the ACPI interrupt has the proper trigger and
6822 local_irq_disable is extraneous. (Matthew Wilcox)
6824 Make "acpi=off" actually do what it says, and not use the ACPI
6825 interpreter *or* the tables.
6827 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
6831 3) iASL Compiler/Disassembler Version 20020829:
6833 Implemented namepath optimization for name declarations. For
6834 example, a declaration like "Method (\_SB_.ABCD)" would get
6835 optimized to "Method (ABCD)" if the declaration is within the
6836 \_SB_ scope. This optimization is in addition to the named
6837 reference path optimization first released in the previous
6838 version. This would seem to complete all possible optimizations
6839 for namepaths within the ASL/AML.
6841 If the target of a Scope() operator already exists, it must be an
6842 object type that actually opens a scope -- such as a Device,
6845 Implemented a check and warning for unreachable code in the same
6846 block below a Return() statement.
6848 Fixed a problem where the listing file was not generated if the
6849 compiler aborted if the maximum error count was exceeded (200).
6851 Fixed a problem where the typechecking of method return values was
6852 broken. This includes the check for a return value when the
6853 method is invoked as a TermArg (a return value is expected.)
6855 Fixed a reported problem where EOF conditions during a quoted
6856 string or comment caused a fault.
6859 ----------------------------------------
6860 15 August 2002. Summary of changes for this release.
6862 1) ACPI CA Core Subsystem Version 20020815:
6864 Fixed a reported problem where a Store to a method argument that
6865 contains a reference did not perform the indirect store correctly.
6866 This problem was created during the conversion to the new
6867 reference object model - the indirect store to a method argument
6868 code was not updated to reflect the new model.
6870 Reworked the ACPI mode change code to better conform to ACPI 2.0,
6871 handle corner cases, and improve code legibility (Kochi Takayoshi)
6873 Fixed a problem with the pathname parsing for the carat (^)
6874 prefix. The heavy use of the carat operator by the new namepath
6875 optimization in the iASL compiler uncovered a problem with the AML
6876 interpreter handling of this prefix. In the case where one or
6877 more carats precede a single nameseg, the nameseg was treated as
6878 standalone and the search rule (to root) was inadvertently
6879 applied. This could cause both the iASL compiler and the
6880 interpreter to find the wrong object or to miss the error that
6881 should occur if the object does not exist at that exact pathname.
6883 Found and fixed the problem where the HP Pavilion DSDT would not
6884 load. This was a relatively minor tweak to the table loading code
6885 (a problem caused by the unexpected encounter with a method
6886 invocation not within a control method), but it does not solve the
6887 overall issue of the execution of AML code at the table level.
6888 This investigation is still ongoing.
6890 Code and Data Size: Current core subsystem library sizes are shown
6891 below. These are the code and data sizes for the acpica.lib
6892 produced by the Microsoft Visual C++ 6.0 compiler, and these
6893 values do not include any ACPI driver or OSPM code. The debug
6894 version of the code includes the debug output trace mechanism and
6895 has a larger code and data size. Note that these values will vary
6896 depending on the efficiency of the compiler and the compiler
6897 options used during generation.
6900 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
6901 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
6903 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6904 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6909 Remove redundant slab.h include (Brad Hards)
6911 Fix several bugs in thermal.c (Herbert Nachtnebel)
6913 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
6915 Change acpi_system_suspend to use updated irq functions (Pavel
6918 Export acpi_get_firmware_table (Matthew Wilcox)
6920 Use proper root proc entry for ACPI (Kochi Takayoshi)
6922 Fix early-boot table parsing (Bjorn Helgaas)
6925 3) iASL Compiler/Disassembler
6927 Reworked the compiler options to make them more consistent and to
6928 use two-letter options where appropriate. We were running out of
6929 sensible letters. This may break some makefiles, so check the
6930 current options list by invoking the compiler with no parameters.
6932 Completed the design and implementation of the ASL namepath
6933 optimization option for the compiler. This option optimizes all
6934 references to named objects to the shortest possible path. The
6935 first attempt tries to utilize a single nameseg (4 characters) and
6936 the "search-to-root" algorithm used by the interpreter. If that
6937 cannot be used (because either the name is not in the search path
6938 or there is a conflict with another object with the same name),
6939 the pathname is optimized using the carat prefix (usually a
6940 shorter string than specifying the entire path from the root.)
6942 Implemented support to obtain the DSDT from the Windows registry
6943 (when the disassembly option is specified with no input file).
6944 Added this code as the implementation for AcpiOsTableOverride in
6945 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
6946 utility) to scan memory for the DSDT to the AcpiOsTableOverride
6947 function in the DOS OSL to make the disassembler truly OS
6950 Implemented a new option to disassemble and compile in one step.
6951 When used without an input filename, this option will grab the
6952 DSDT from the local machine, disassemble it, and compile it in one
6955 Added a warning message for invalid escapes (a backslash followed
6956 by any character other than the allowable escapes). This catches
6957 the quoted string error "\_SB_" (which should be "\\_SB_" ).
6959 Also, there are numerous instances in the ACPI specification where
6962 Added a compiler option to disable all optimizations. This is
6963 basically the "compatibility mode" because by using this option,
6964 the AML code will come out exactly the same as other ASL
6967 Added error messages for incorrectly ordered dependent resource
6968 functions. This includes: missing EndDependentFn macro at end of
6969 dependent resource list, nested dependent function macros (both
6970 start and end), and missing StartDependentFn macro. These are
6971 common errors that should be caught at compile time.
6973 Implemented _OSI support for the disassembler and compiler. _OSI
6974 must be included in the namespace for proper disassembly (because
6975 the disassembler must know the number of arguments.)
6977 Added an "optimization" message type that is optional (off by
6978 default). This message is used for all optimizations - including
6979 constant folding, integer optimization, and namepath optimization.
6981 ----------------------------------------
6982 25 July 2002. Summary of changes for this release.
6985 1) ACPI CA Core Subsystem Version 20020725:
6987 The AML Disassembler has been enhanced to produce compilable ASL
6988 code and has been integrated into the iASL compiler (see below) as
6989 well as the single-step disassembly for the AML debugger and the
6990 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
6991 resource templates and macros are fully supported. The
6992 disassembler has been tested on over 30 different AML files,
6993 producing identical AML when the resulting disassembled ASL file
6994 is recompiled with the same ASL compiler.
6996 Modified the Resource Manager to allow zero interrupts and zero
6997 dma channels during the GetCurrentResources call. This was
6998 causing problems on some platforms.
7000 Added the AcpiOsRedirectOutput interface to the OSL to simplify
7001 output redirection for the AcpiOsPrintf and AcpiOsVprintf
7004 Code and Data Size: Current core subsystem library sizes are shown
7005 below. These are the code and data sizes for the acpica.lib
7006 produced by the Microsoft Visual C++ 6.0 compiler, and these
7007 values do not include any ACPI driver or OSPM code. The debug
7008 version of the code includes the debug output trace mechanism and
7009 has a larger code and data size. Note that these values will vary
7010 depending on the efficiency of the compiler and the compiler
7011 options used during generation.
7014 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7015 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7017 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7018 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7023 Fixed a panic in the EC driver (Dominik Brodowski)
7025 Implemented checksum of the R/XSDT itself during Linux table scan
7031 The AML disassembler is integrated into the compiler. The "-d"
7032 option invokes the disassembler to completely disassemble an
7033 input AML file, producing as output a text ASL file with the
7034 extension ".dsl" (to avoid name collisions with existing .asl
7035 source files.) A future enhancement will allow the disassembler
7036 to obtain the BIOS DSDT from the registry under Windows.
7038 Fixed a problem with the VendorShort and VendorLong resource
7039 descriptors where an invalid AML sequence was created.
7041 Implemented a fix for BufferData term in the ASL parser. It was
7042 inadvertently defined twice, allowing invalid syntax to pass and
7043 causing reduction conflicts.
7045 Fixed a problem where the Ones opcode could get converted to a
7046 value of zero if "Ones" was used where a byte, word or dword value
7047 was expected. The 64-bit value is now truncated to the correct
7048 size with the correct value.
7052 ----------------------------------------
7053 02 July 2002. Summary of changes for this release.
7056 1) ACPI CA Core Subsystem Version 20020702:
7058 The Table Manager code has been restructured to add several new
7059 features. Tables that are not required by the core subsystem
7060 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
7061 validated in any way and are returned from AcpiGetFirmwareTable if
7062 requested. The AcpiOsTableOverride interface is now called for
7063 each table that is loaded by the subsystem in order to allow the
7064 host to override any table it chooses. Previously, only the DSDT
7065 could be overridden. Added one new files, tbrsdt.c and
7068 Fixed a problem with the conversion of internal package objects to
7069 external objects (when a package is returned from a control
7070 method.) The return buffer length was set to zero instead of the
7071 proper length of the package object.
7073 Fixed a reported problem with the use of the RefOf and DeRefOf
7074 operators when passing reference arguments to control methods. A
7075 new type of Reference object is used internally for references
7076 produced by the RefOf operator.
7078 Added additional error messages in the Resource Manager to explain
7079 AE_BAD_DATA errors when they occur during resource parsing.
7081 Split the AcpiEnableSubsystem into two primitives to enable a
7082 finer granularity initialization sequence. These two calls should
7083 be called in this order: AcpiEnableSubsystem (flags),
7084 AcpiInitializeObjects (flags). The flags parameter remains the
7090 Updated the ACPI utilities module to understand the new style of
7091 fully resolved package objects that are now returned from the core
7092 subsystem. This eliminates errors of the form:
7094 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
7095 acpi_utils-0430 [145] acpi_evaluate_reference:
7096 Invalid element in package (not a device reference)
7098 The method evaluation utility uses the new buffer allocation
7099 scheme instead of calling AcpiEvaluate Object twice.
7101 Added support for ECDT. This allows the use of the Embedded
7103 Controller before the namespace has been fully initialized, which
7104 is necessary for ACPI 2.0 support, and for some laptops to
7105 initialize properly. (Laptops using ECDT are still rare, so only
7106 limited testing was performed of the added functionality.)
7108 Fixed memory leaks in the EC driver.
7110 Eliminated a brittle code structure in acpi_bus_init().
7112 Eliminated the acpi_evaluate() helper function in utils.c. It is
7113 no longer needed since acpi_evaluate_object can optionally
7114 allocate memory for the return object.
7116 Implemented fix for keyboard hang when getting battery readings on
7117 some systems (Stephen White)
7119 PCI IRQ routing update (Dominik Brodowski)
7121 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
7124 ----------------------------------------
7125 11 June 2002. Summary of changes for this release.
7128 1) ACPI CA Core Subsystem Version 20020611:
7130 Fixed a reported problem where constants such as Zero and One
7131 appearing within _PRT packages were not handled correctly within
7132 the resource manager code. Originally reported against the ASL
7133 compiler because the code generator now optimizes integers to
7134 their minimal AML representation (i.e. AML constants if possible.)
7135 The _PRT code now handles all AML constant opcodes correctly
7136 (Zero, One, Ones, Revision).
7138 Fixed a problem with the Concatenate operator in the AML
7139 interpreter where a buffer result object was incorrectly marked as
7140 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
7142 All package sub-objects are now fully resolved before they are
7143 returned from the external ACPI interfaces. This means that name
7144 strings are resolved to object handles, and constant operators
7145 (Zero, One, Ones, Revision) are resolved to Integers.
7147 Implemented immediate resolution of the AML Constant opcodes
7148 (Zero, One, Ones, Revision) to Integer objects upon detection
7149 within the AML stream. This has simplified and reduced the
7150 generated code size of the subsystem by eliminating about 10
7151 switch statements for these constants (which previously were
7152 contained in Reference objects.) The complicating issues are that
7153 the Zero opcode is used as a "placeholder" for unspecified
7154 optional target operands and stores to constants are defined to be
7157 Code and Data Size: Current core subsystem library sizes are shown
7158 below. These are the code and data sizes for the acpica.lib
7159 produced by the Microsoft Visual C++ 6.0 compiler, and these
7160 values do not include any ACPI driver or OSPM code. The debug
7161 version of the code includes the debug output trace mechanism and
7162 has a larger code and data size. Note that these values will vary
7163 depending on the efficiency of the compiler and the compiler
7164 options used during generation.
7167 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7168 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7170 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7171 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7177 Added preliminary support for obtaining _TRA data for PCI root
7178 bridges (Bjorn Helgaas).
7181 3) iASL Compiler Version X2046:
7183 Fixed a problem where the "_DDN" reserved name was defined to be a
7184 control method with one argument. There are no arguments, and
7185 _DDN does not have to be a control method.
7187 Fixed a problem with the Linux version of the compiler where the
7188 source lines printed with error messages were the wrong lines.
7189 This turned out to be the "LF versus CR/LF" difference between
7190 Windows and Unix. This appears to be the longstanding issue
7191 concerning listing output and error messages.
7193 Fixed a problem with the Linux version of compiler where opcode
7194 names within error messages were wrong. This was caused by a
7195 slight difference in the output of the Flex tool on Linux versus
7198 Fixed a problem with the Linux compiler where the hex output files
7199 contained some garbage data caused by an internal buffer overrun.
7202 ----------------------------------------
7203 17 May 2002. Summary of changes for this release.
7206 1) ACPI CA Core Subsystem Version 20020517:
7208 Implemented a workaround to an BIOS bug discovered on the HP
7209 OmniBook where the FADT revision number and the table size are
7210 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
7211 behavior is to fallback to using only the ACPI 1.0 fields of the
7212 FADT if the table is too small to be a ACPI 2.0 table as claimed
7213 by the revision number. Although this is a BIOS bug, this is a
7214 case where the workaround is simple enough and with no side
7215 effects, so it seemed prudent to add it. A warning message is
7218 Implemented minimum size checks for the fixed-length ACPI tables -
7219 - the FADT and FACS, as well as consistency checks between the
7220 revision number and the table size.
7222 Fixed a reported problem in the table override support where the
7223 new table pointer was incorrectly treated as a physical address
7224 instead of a logical address.
7226 Eliminated the use of the AE_AML_ERROR exception and replaced it
7227 with more descriptive codes.
7229 Fixed a problem where an exception would occur if an ASL Field was
7230 defined with no named Field Units underneath it (used by some
7233 Code and Data Size: Current core subsystem library sizes are shown
7234 below. These are the code and data sizes for the acpica.lib
7235 produced by the Microsoft Visual C++ 6.0 compiler, and these
7236 values do not include any ACPI driver or OSPM code. The debug
7237 version of the code includes the debug output trace mechanism and
7238 has a larger code and data size. Note that these values will vary
7239 depending on the efficiency of the compiler and the compiler
7240 options used during generation.
7243 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7244 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7246 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7247 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7253 Much work done on ACPI init (MADT and PCI IRQ routing support).
7254 (Paul D. and Dominik Brodowski)
7256 Fix PCI IRQ-related panic on boot (Sam Revitch)
7258 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
7260 Fix "MHz" typo (Dominik Brodowski)
7262 Fix RTC year 2000 issue (Dominik Brodowski)
7264 Preclude multiple button proc entries (Eric Brunet)
7266 Moved arch-specific code out of include/platform/aclinux.h
7268 3) iASL Compiler Version X2044:
7270 Implemented error checking for the string used in the EISAID macro
7271 (Usually used in the definition of the _HID object.) The code now
7272 strictly enforces the PnP format - exactly 7 characters, 3
7273 uppercase letters and 4 hex digits.
7275 If a raw string is used in the definition of the _HID object
7276 (instead of the EISAID macro), the string must contain all
7277 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7280 Implemented checking for invalid use of ACPI reserved names for
7281 most of the name creation operators (Name, Device, Event, Mutex,
7282 OperationRegion, PowerResource, Processor, and ThermalZone.)
7283 Previously, this check was only performed for control methods.
7285 Implemented an additional check on the Name operator to emit an
7286 error if a reserved name that must be implemented in ASL as a
7287 control method is used. We know that a reserved name must be a
7288 method if it is defined with input arguments.
7290 The warning emitted when a namespace object reference is not found
7291 during the cross reference phase has been changed into an error.
7292 The "External" directive should be used for names defined in other
7296 4) Tools and Utilities
7298 The 16-bit tools (adump16 and aexec16) have been regenerated and
7301 Fixed a problem with the output of both acpidump and adump16 where
7302 the indentation of closing parentheses and brackets was not
7304 aligned properly with the parent block.
7307 ----------------------------------------
7308 03 May 2002. Summary of changes for this release.
7311 1) ACPI CA Core Subsystem Version 20020503:
7313 Added support a new OSL interface that allows the host operating
7315 system software to override the DSDT found in the firmware -
7316 AcpiOsTableOverride. With this interface, the OSL can examine the
7317 version of the firmware DSDT and replace it with a different one
7320 Added new external interfaces for accessing ACPI registers from
7321 device drivers and other system software - AcpiGetRegister and
7322 AcpiSetRegister. This was simply an externalization of the
7323 existing AcpiHwBitRegister interfaces.
7325 Fixed a regression introduced in the previous build where the
7326 ASL/AML CreateField operator always returned an error,
7327 "destination must be a NS Node".
7329 Extended the maximum time (before failure) to successfully enable
7330 ACPI mode to 3 seconds.
7332 Code and Data Size: Current core subsystem library sizes are shown
7333 below. These are the code and data sizes for the acpica.lib
7334 produced by the Microsoft Visual C++ 6.0 compiler, and these
7335 values do not include any ACPI driver or OSPM code. The debug
7336 version of the code includes the debug output trace mechanism and
7337 has a larger code and data size. Note that these values will vary
7338 depending on the efficiency of the compiler and the compiler
7339 options used during generation.
7342 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7343 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7345 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7346 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7351 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
7352 free. While 3 out of 4 of our in-house systems work fine, the last
7353 one still hangs when testing the LAPIC timer.
7355 Renamed many files in 2.5 kernel release to omit "acpi_" from the
7358 Added warning on boot for Presario 711FR.
7360 Sleep improvements (Pavel Machek)
7362 ACPI can now be built without CONFIG_PCI enabled.
7364 IA64: Fixed memory map functions (JI Lee)
7367 3) iASL Compiler Version X2043:
7369 Added support to allow the compiler to be integrated into the MS
7370 VC++ development environment for one-button compilation of single
7371 files or entire projects -- with error-to-source-line mapping.
7373 Implemented support for compile-time constant folding for the
7374 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
7375 specification. This allows the ASL writer to use expressions
7376 instead of Integer/Buffer/String constants in terms that must
7377 evaluate to constants at compile time and will also simplify the
7378 emitted AML in any such sub-expressions that can be folded
7379 (evaluated at compile-time.) This increases the size of the
7380 compiler significantly because a portion of the ACPI CA AML
7381 interpreter is included within the compiler in order to pre-
7382 evaluate constant expressions.
7385 Fixed a problem with the "Unicode" ASL macro that caused the
7386 compiler to fault. (This macro is used in conjunction with the
7387 _STR reserved name.)
7389 Implemented an AML opcode optimization to use the Zero, One, and
7390 Ones opcodes where possible to further reduce the size of integer
7391 constants and thus reduce the overall size of the generated AML
7394 Implemented error checking for new reserved terms for ACPI version
7397 Implemented the -qr option to display the current list of ACPI
7398 reserved names known to the compiler.
7400 Implemented the -qc option to display the current list of ASL
7401 operators that are allowed within constant expressions and can
7402 therefore be folded at compile time if the operands are constants.
7407 Updated the Programmer's Reference for new interfaces, data types,
7408 and memory allocation model options.
7410 Updated the iASL Compiler User Reference to apply new format and
7411 add information about new features and options.
7413 ----------------------------------------
7414 19 April 2002. Summary of changes for this release.
7416 1) ACPI CA Core Subsystem Version 20020419:
7418 The source code base for the Core Subsystem has been completely
7419 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
7420 versions. The Lint option files used are included in the
7421 /acpi/generate/lint directory.
7423 Implemented enhanced status/error checking across the entire
7424 Hardware manager subsystem. Any hardware errors (reported from
7425 the OSL) are now bubbled up and will abort a running control
7429 Fixed a problem where the per-ACPI-table integer width (32 or 64)
7430 was stored only with control method nodes, causing a fault when
7431 non-control method code was executed during table loading. The
7432 solution implemented uses a global variable to indicate table
7433 width across the entire ACPI subsystem. Therefore, ACPI CA does
7434 not support mixed integer widths across different ACPI tables
7437 Fixed a problem where NULL extended fields (X fields) in an ACPI
7438 2.0 ACPI FADT caused the table load to fail. Although the
7439 existing ACPI specification is a bit fuzzy on this topic, the new
7440 behavior is to fall back on a ACPI 1.0 field if the corresponding
7441 ACPI 2.0 X field is zero (even though the table revision indicates
7442 a full ACPI 2.0 table.) The ACPI specification will be updated to
7445 Fixed a problem with the SystemMemory operation region handler
7446 where memory was always accessed byte-wise even if the AML-
7447 specified access width was larger than a byte. This caused
7448 problems on systems with memory-mapped I/O. Memory is now
7449 accessed with the width specified. On systems that do not support
7450 non-aligned transfers, a check is made to guarantee proper address
7451 alignment before proceeding in order to avoid an AML-caused
7452 alignment fault within the kernel.
7455 Fixed a problem with the ExtendedIrq resource where only one byte
7456 of the 4-byte Irq field was extracted.
7458 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
7459 function was out of date and required a rewrite.
7461 Code and Data Size: Current core subsystem library sizes are shown
7462 below. These are the code and data sizes for the acpica.lib
7463 produced by the Microsoft Visual C++ 6.0 compiler, and these
7464 values do not include any ACPI driver or OSPM code. The debug
7465 version of the code includes the debug output trace mechanism and
7466 has a larger code and data size. Note that these values will vary
7467 depending on the efficiency of the compiler and the compiler
7468 options used during generation.
7471 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7472 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7474 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7475 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7480 PCI IRQ routing fixes (Dominik Brodowski)
7483 3) iASL Compiler Version X2042:
7485 Implemented an additional compile-time error check for a field
7486 unit whose size + minimum access width would cause a run-time
7487 access beyond the end-of-region. Previously, only the field size
7490 The Core subsystem and iASL compiler now share a common parse
7491 object in preparation for compile-time evaluation of the type
7492 3/4/5 ASL operators.
7495 ----------------------------------------
7496 Summary of changes for this release: 03_29_02
7498 1) ACPI CA Core Subsystem Version 20020329:
7500 Implemented support for late evaluation of TermArg operands to
7501 Buffer and Package objects. This allows complex expressions to be
7502 used in the declarations of these object types.
7504 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
7505 1.0, if the field was larger than 32 bits, it was returned as a
7506 buffer - otherwise it was returned as an integer. In ACPI 2.0,
7507 the field is returned as a buffer only if the field is larger than
7508 64 bits. The TableRevision is now considered when making this
7509 conversion to avoid incompatibility with existing ASL code.
7511 Implemented logical addressing for AcpiOsGetRootPointer. This
7512 allows an RSDP with either a logical or physical address. With
7513 this support, the host OS can now override all ACPI tables with
7514 one logical RSDP. Includes implementation of "typed" pointer
7515 support to allow a common data type for both physical and logical
7516 pointers internally. This required a change to the
7517 AcpiOsGetRootPointer interface.
7519 Implemented the use of ACPI 2.0 Generic Address Structures for all
7520 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
7521 mapped I/O for these ACPI features.
7523 Initialization now ignores not only non-required tables (All
7524 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
7525 not validate the table headers of unrecognized tables.
7527 Fixed a problem where a notify handler could only be
7528 installed/removed on an object of type Device. All "notify"
7530 objects are now supported -- Devices, Processor, Power, and
7533 Removed most verbosity from the ACPI_DB_INFO debug level. Only
7534 critical information is returned when this debug level is enabled.
7536 Code and Data Size: Current core subsystem library sizes are shown
7537 below. These are the code and data sizes for the acpica.lib
7538 produced by the Microsoft Visual C++ 6.0 compiler, and these
7539 values do not include any ACPI driver or OSPM code. The debug
7540 version of the code includes the debug output trace mechanism and
7541 has a larger code and data size. Note that these values will vary
7542 depending on the efficiency of the compiler and the compiler
7543 options used during generation.
7546 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7547 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7549 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7550 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7555 The processor driver (acpi_processor.c) now fully supports ACPI
7556 2.0-based processor performance control (e.g. Intel(R)
7557 SpeedStep(TM) technology) Note that older laptops that only have
7558 the Intel "applet" interface are not supported through this. The
7559 'limit' and 'performance' interface (/proc) are fully functional.
7560 [Note that basic policy for controlling performance state
7561 transitions will be included in the next version of ospmd.] The
7562 idle handler was modified to more aggressively use C2, and PIIX4
7563 errata handling underwent a complete overhaul (big thanks to
7566 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
7567 based devices in the ACPI namespace are now dynamically bound
7568 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
7569 This allows, among other things, ACPI to resolve bus numbers for
7570 subordinate PCI bridges.
7572 Enhanced PCI IRQ routing to get the proper bus number for _PRT
7573 entries defined underneath PCI bridges.
7575 Added IBM 600E to bad bios list due to invalid _ADR value for
7576 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
7578 In the process of adding full MADT support (e.g. IOAPIC) for IA32
7579 (acpi.c, mpparse.c) -- stay tuned.
7581 Added back visual differentiation between fixed-feature and
7582 control-method buttons in dmesg. Buttons are also subtyped (e.g.
7583 button/power/PWRF) to simplify button identification.
7585 We no longer use -Wno-unused when compiling debug. Please ignore
7586 any "_THIS_MODULE defined but not used" messages.
7588 Can now shut down the system using "magic sysrq" key.
7591 3) iASL Compiler version 2041:
7593 Fixed a problem where conversion errors for hex/octal/decimal
7594 constants were not reported.
7596 Implemented a fix for the General Register template Address field.
7597 This field was 8 bits when it should be 64.
7599 Fixed a problem where errors/warnings were no longer being emitted
7600 within the listing output file.
7602 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
7603 exactly 4 characters, alphanumeric only.
7608 ----------------------------------------
7609 Summary of changes for this release: 03_08_02
7612 1) ACPI CA Core Subsystem Version 20020308:
7614 Fixed a problem with AML Fields where the use of the "AccessAny"
7615 keyword could cause an interpreter error due to attempting to read
7616 or write beyond the end of the parent Operation Region.
7618 Fixed a problem in the SystemMemory Operation Region handler where
7619 an attempt was made to map memory beyond the end of the region.
7620 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
7621 errors on some Linux systems.
7623 Fixed a problem where the interpreter/namespace "search to root"
7624 algorithm was not functioning for some object types. Relaxed the
7625 internal restriction on the search to allow upsearches for all
7626 external object types as well as most internal types.
7631 We now use safe_halt() macro versus individual calls to sti | hlt.
7633 Writing to the processor limit interface should now work. "echo 1"
7634 will increase the limit, 2 will decrease, and 0 will reset to the
7641 Fixed segfault on Linux version.
7644 ----------------------------------------
7645 Summary of changes for this release: 02_25_02
7647 1) ACPI CA Core Subsystem:
7650 Fixed a problem where the GPE bit masks were not initialized
7651 properly, causing erratic GPE behavior.
7653 Implemented limited support for multiple calling conventions. The
7654 code can be generated with either the VPL (variable parameter
7655 list, or "C") convention, or the FPL (fixed parameter list, or
7656 "Pascal") convention. The core subsystem is about 3.4% smaller
7657 when generated with FPL.
7662 Re-add some /proc/acpi/event functionality that was lost during
7665 Resolved issue with /proc events for fixed-feature buttons showing
7666 up as the system device.
7668 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
7670 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
7672 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
7674 Fixed limit interface & usage to fix bugs with passive cooling
7677 Restructured PRT support.
7680 ----------------------------------------
7681 Summary of changes for this label: 02_14_02
7684 1) ACPI CA Core Subsystem:
7686 Implemented support in AcpiLoadTable to allow loading of FACS and
7689 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
7690 been removed. All 64-bit platforms should be migrated to the ACPI
7691 2.0 tables. The actbl71.h header has been removed from the source
7694 All C macros defined within the subsystem have been prefixed with
7695 "ACPI_" to avoid collision with other system include files.
7697 Removed the return value for the two AcpiOsPrint interfaces, since
7698 it is never used and causes lint warnings for ignoring the return
7701 Added error checking to all internal mutex acquire and release
7702 calls. Although a failure from one of these interfaces is
7703 probably a fatal system error, these checks will cause the
7704 immediate abort of the currently executing method or interface.
7706 Fixed a problem where the AcpiSetCurrentResources interface could
7707 fault. This was a side effect of the deployment of the new memory
7710 Fixed a couple of problems with the Global Lock support introduced
7711 in the last major build. The "common" (1.0/2.0) internal FACS was
7712 being overwritten with the FACS signature and clobbering the
7713 Global Lock pointer. Also, the actual firmware FACS was being
7714 unmapped after construction of the "common" FACS, preventing
7715 access to the actual Global Lock field within it. The "common"
7716 internal FACS is no longer installed as an actual ACPI table; it
7717 is used simply as a global.
7719 Code and Data Size: Current core subsystem library sizes are shown
7720 below. These are the code and data sizes for the acpica.lib
7721 produced by the Microsoft Visual C++ 6.0 compiler, and these
7722 values do not include any ACPI driver or OSPM code. The debug
7723 version of the code includes the debug output trace mechanism and
7724 has a larger code and data size. Note that these values will vary
7725 depending on the efficiency of the compiler and the compiler
7726 options used during generation.
7728 Previous Release (02_07_01)
7729 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7730 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7732 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7733 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7738 Updated Linux-specific code for core macro and OSL interface
7739 changes described above.
7741 Improved /proc/acpi/event. It now can be opened only once and has
7742 proper poll functionality.
7744 Fixed and restructured power management (acpi_bus).
7746 Only create /proc "view by type" when devices of that class exist.
7748 Fixed "charging/discharging" bug (and others) in acpi_battery.
7750 Improved thermal zone code.
7753 3) ASL Compiler, version X2039:
7756 Implemented the new compiler restriction on ASL String hex/octal
7757 escapes to non-null, ASCII values. An error results if an invalid
7758 value is used. (This will require an ACPI 2.0 specification
7761 AML object labels that are output to the optional C and ASM source
7762 are now prefixed with both the ACPI table signature and table ID
7763 to help guarantee uniqueness within a large BIOS project.
7766 ----------------------------------------
7767 Summary of changes for this label: 02_01_02
7769 1) ACPI CA Core Subsystem:
7771 ACPI 2.0 support is complete in the entire Core Subsystem and the
7772 ASL compiler. All new ACPI 2.0 operators are implemented and all
7773 other changes for ACPI 2.0 support are complete. With
7774 simultaneous code and data optimizations throughout the subsystem,
7775 ACPI 2.0 support has been implemented with almost no additional
7776 cost in terms of code and data size.
7778 Implemented a new mechanism for allocation of return buffers. If
7779 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
7780 be allocated on behalf of the caller. Consolidated all return
7781 buffer validation and allocation to a common procedure. Return
7782 buffers will be allocated via the primary OSL allocation interface
7783 since it appears that a separate pool is not needed by most users.
7784 If a separate pool is required for these buffers, the caller can
7785 still use the original mechanism and pre-allocate the buffer(s).
7787 Implemented support for string operands within the DerefOf
7790 Restructured the Hardware and Event managers to be table driven,
7791 simplifying the source code and reducing the amount of generated
7794 Split the common read/write low-level ACPI register bitfield
7795 procedure into a separate read and write, simplifying the code
7798 Obsoleted the AcpiOsCallocate OSL interface. This interface was
7799 used only a handful of times and didn't have enough critical mass
7800 for a separate interface. Replaced with a common calloc procedure
7803 Fixed a reported problem with the GPE number mapping mechanism
7804 that allows GPE1 numbers to be non-contiguous with GPE0.
7805 Reorganized the GPE information and shrunk a large array that was
7806 originally large enough to hold info for all possible GPEs (256)
7807 to simply large enough to hold all GPEs up to the largest GPE
7808 number on the machine.
7810 Fixed a reported problem with resource structure alignment on 64-
7813 Changed the AcpiEnableEvent and AcpiDisableEvent external
7814 interfaces to not require any flags for the common case of
7815 enabling/disabling a GPE.
7817 Implemented support to allow a "Notify" on a Processor object.
7819 Most TBDs in comments within the source code have been resolved
7823 Fixed a problem in the interpreter where a standalone parent
7824 prefix (^) was not handled correctly in the interpreter and
7827 Removed obsolete and unnecessary GPE save/restore code.
7829 Implemented Field support in the ASL Load operator. This allows a
7830 table to be loaded from a named field, in addition to loading a
7831 table directly from an Operation Region.
7833 Implemented timeout and handle support in the external Global Lock
7836 Fixed a problem in the AcpiDump utility where pathnames were no
7837 longer being generated correctly during the dump of named objects.
7839 Modified the AML debugger to give a full display of if/while
7840 predicates instead of just one AML opcode at a time. (The
7841 predicate can have several nested ASL statements.) The old method
7842 was confusing during single stepping.
7844 Code and Data Size: Current core subsystem library sizes are shown
7845 below. These are the code and data sizes for the acpica.lib
7846 produced by the Microsoft Visual C++ 6.0 compiler, and these
7847 values do not include any ACPI driver or OSPM code. The debug
7848 version of the code includes the debug output trace mechanism and
7849 has a larger code and data size. Note that these values will vary
7850 depending on the efficiency of the compiler and the compiler
7851 options used during generation.
7853 Previous Release (12_18_01)
7854 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
7855 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
7857 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7858 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7862 Implemented fix for PIIX reverse throttling errata (Processor
7865 Added new Limit interface (Processor and Thermal drivers)
7867 New thermal policy (Thermal driver)
7869 Many updates to /proc
7871 Battery "low" event support (Battery driver)
7873 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
7875 IA32 - IA64 initialization unification, no longer experimental
7877 Menuconfig options redesigned
7879 3) ASL Compiler, version X2037:
7881 Implemented several new output features to simplify integration of
7882 AML code into firmware: 1) Output the AML in C source code with
7883 labels for each named ASL object. The original ASL source code
7884 is interleaved as C comments. 2) Output the AML in ASM source code
7885 with labels and interleaved ASL source. 3) Output the AML in
7886 raw hex table form, in either C or ASM.
7888 Implemented support for optional string parameters to the
7891 Completed support for embedded escape sequences within string
7892 literals. The compiler now supports all single character escapes
7893 as well as the Octal and Hex escapes. Note: the insertion of a
7894 null byte into a string literal (via the hex/octal escape) causes
7895 the string to be immediately terminated. A warning is issued.
7897 Fixed a problem where incorrect AML was generated for the case
7898 where an ASL namepath consists of a single parent prefix (
7900 ) with no trailing name segments.
7902 The compiler has been successfully generated with a 64-bit C
7908 ----------------------------------------
7909 Summary of changes for this label: 12_18_01
7913 Enhanced blacklist with reason and severity fields. Any table's
7914 signature may now be used to identify a blacklisted system.
7916 Call _PIC control method to inform the firmware which interrupt
7917 model the OS is using. Turn on any disabled link devices.
7919 Cleaned up busmgr /proc error handling (Andreas Dilger)
7921 2) ACPI CA Core Subsystem:
7923 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
7926 Completed implementation of the ACPI 2.0 "Continue",
7927 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
7928 operators. All new ACPI 2.0 operators are now implemented in both
7929 the ASL compiler and the AML interpreter. The only remaining ACPI
7930 2.0 task is support for the String data type in the DerefOf
7931 operator. Fixed a problem with AcquireMutex where the status code
7932 was lost if the caller had to actually wait for the mutex.
7934 Increased the maximum ASL Field size from 64K bits to 4G bits.
7936 Completed implementation of the external Global Lock interfaces --
7937 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
7938 Handler parameters were added.
7940 Completed another pass at removing warnings and issues when
7941 compiling with 64-bit compilers. The code now compiles cleanly
7942 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
7943 add and subtract (diff) macros have changed considerably.
7946 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
7947 64-bit platforms, 32-bits on all others. This type is used
7948 wherever memory allocation and/or the C sizeof() operator is used,
7949 and affects the OSL memory allocation interfaces AcpiOsAllocate
7950 and AcpiOsCallocate.
7952 Implemented sticky user breakpoints in the AML debugger.
7954 Code and Data Size: Current core subsystem library sizes are shown
7955 below. These are the code and data sizes for the acpica.lib
7956 produced by the Microsoft Visual C++ 6.0 compiler, and these
7957 values do not include any ACPI driver or OSPM code. The debug
7958 version of the code includes the debug output trace mechanism and
7959 has a larger code and data size. Note that these values will vary
7960 depending on the efficiency of the compiler and the compiler
7961 options used during generation.
7963 Previous Release (12_05_01)
7964 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
7965 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
7967 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
7968 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
7970 3) ASL Compiler, version X2034:
7972 Now checks for (and generates an error if detected) the use of a
7973 Break or Continue statement without an enclosing While statement.
7976 Successfully generated the compiler with the Intel 64-bit C
7979 ----------------------------------------
7980 Summary of changes for this label: 12_05_01
7982 1) ACPI CA Core Subsystem:
7984 The ACPI 2.0 CopyObject operator is fully implemented. This
7985 operator creates a new copy of an object (and is also used to
7986 bypass the "implicit conversion" mechanism of the Store operator.)
7988 The ACPI 2.0 semantics for the SizeOf operator are fully
7989 implemented. The change is that performing a SizeOf on a
7990 reference object causes an automatic dereference of the object to
7991 tha actual value before the size is evaluated. This behavior was
7992 undefined in ACPI 1.0.
7994 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
7995 have been implemented. The interrupt polarity and mode are now
7998 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
7999 appearing in Package objects were not properly converted to
8000 integers when the internal Package was converted to an external
8001 object (via the AcpiEvaluateObject interface.)
8003 Fixed a problem with the namespace object deletion mechanism for
8004 objects created by control methods. There were two parts to this
8005 problem: 1) Objects created during the initialization phase method
8006 parse were not being deleted, and 2) The object owner ID mechanism
8007 to track objects was broken.
8009 Fixed a problem where the use of the ASL Scope operator within a
8010 control method would result in an invalid opcode exception.
8012 Fixed a problem introduced in the previous label where the buffer
8013 length required for the _PRT structure was not being returned
8016 Code and Data Size: Current core subsystem library sizes are shown
8017 below. These are the code and data sizes for the acpica.lib
8018 produced by the Microsoft Visual C++ 6.0 compiler, and these
8019 values do not include any ACPI driver or OSPM code. The debug
8020 version of the code includes the debug output trace mechanism and
8021 has a larger code and data size. Note that these values will vary
8022 depending on the efficiency of the compiler and the compiler
8023 options used during generation.
8025 Previous Release (11_20_01)
8026 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8027 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8030 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8031 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8035 Updated all files to apply cleanly against 2.4.16.
8037 Added basic PCI Interrupt Routing Table (PRT) support for IA32
8038 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
8039 version supports both static and dyanmic PRT entries, but dynamic
8040 entries are treated as if they were static (not yet
8041 reconfigurable). Architecture- specific code to use this data is
8042 absent on IA32 but should be available shortly.
8044 Changed the initialization sequence to start the ACPI interpreter
8045 (acpi_init) prior to initialization of the PCI driver (pci_init)
8046 in init/main.c. This ordering is required to support PRT and
8047 facilitate other (future) enhancement. A side effect is that the
8048 ACPI bus driver and certain device drivers can no longer be loaded
8051 Modified the 'make menuconfig' options to allow PCI Interrupt
8052 Routing support to be included without the ACPI Bus and other
8055 3) ASL Compiler, version X2033:
8057 Fixed some issues with the use of the new CopyObject and
8058 DataTableRegion operators. Both are fully functional.
8060 ----------------------------------------
8061 Summary of changes for this label: 11_20_01
8063 20 November 2001. Summary of changes for this release.
8065 1) ACPI CA Core Subsystem:
8067 Updated Index support to match ACPI 2.0 semantics. Storing a
8068 Integer, String, or Buffer to an Index of a Buffer will store only
8069 the least-significant byte of the source to the Indexed buffer
8070 byte. Multiple writes are not performed.
8072 Fixed a problem where the access type used in an AccessAs ASL
8073 operator was not recorded correctly into the field object.
8075 Fixed a problem where ASL Event objects were created in a
8076 signalled state. Events are now created in an unsignalled state.
8078 The internal object cache is now purged after table loading and
8079 initialization to reduce the use of dynamic kernel memory -- on
8080 the assumption that object use is greatest during the parse phase
8081 of the entire table (versus the run-time use of individual control
8084 ACPI 2.0 variable-length packages are now fully operational.
8086 Code and Data Size: Code and Data optimizations have permitted new
8087 feature development with an actual reduction in the library size.
8088 Current core subsystem library sizes are shown below. These are
8089 the code and data sizes for the acpica.lib produced by the
8090 Microsoft Visual C++ 6.0 compiler, and these values do not include
8091 any ACPI driver or OSPM code. The debug version of the code
8092 includes the debug output trace mechanism and has a larger code
8093 and data size. Note that these values will vary depending on the
8094 efficiency of the compiler and the compiler options used during
8097 Previous Release (11_09_01):
8098 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8099 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8102 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8103 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8107 Enhanced the ACPI boot-time initialization code to allow the use
8108 of Local APIC tables for processor enumeration on IA-32, and to
8109 pave the way for a fully MPS-free boot (on SMP systems) in the
8110 near future. This functionality replaces
8111 arch/i386/kernel/acpitables.c, which was introduced in an earlier
8112 2.4.15-preX release. To enable this feature you must add
8113 "acpi_boot=on" to the kernel command line -- see the help entry
8114 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
8117 Restructured the configuration options to allow boot-time table
8118 parsing support without inclusion of the ACPI Interpreter (and
8121 NOTE: This release does not include fixes for the reported events,
8122 power-down, and thermal passive cooling issues (coming soon).
8126 Added additional typechecking for Fields within restricted access
8127 Operation Regions. All fields within EC and CMOS regions must be
8128 declared with ByteAcc. All fields withing SMBus regions must be
8129 declared with the BufferAcc access type.
8131 Fixed a problem where the listing file output of control methods
8132 no longer interleaved the actual AML code with the ASL source
8138 ----------------------------------------
8139 Summary of changes for this label: 11_09_01
8141 1) ACPI CA Core Subsystem:
8143 Implemented ACPI 2.0-defined support for writes to fields with a
8144 Buffer, String, or Integer source operand that is smaller than the
8145 target field. In these cases, the source operand is zero-extended
8146 to fill the target field.
8148 Fixed a problem where a Field starting bit offset (within the
8149 parent operation region) was calculated incorrectly if the
8151 alignment of the field differed from the access width. This
8152 affected CreateWordField, CreateDwordField, CreateQwordField, and
8153 possibly other fields that use the "AccessAny" keyword.
8155 Fixed a problem introduced in the 11_02_01 release where indirect
8156 stores through method arguments did not operate correctly.
8160 Implemented boot-time ACPI table parsing support
8161 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
8162 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
8163 legacy BIOS interfaces (e.g. MPS) for the configuration of system
8164 processors, memory, and interrupts during setup_arch(). Note that
8165 this patch does not include the required architecture-specific
8166 changes required to apply this information -- subsequent patches
8167 will be posted for both IA32 and IA64 to achieve this.
8169 Added low-level sleep support for IA32 platforms, courtesy of Pat
8170 Mochel. This allows IA32 systems to transition to/from various
8171 sleeping states (e.g. S1, S3), although the lack of a centralized
8172 driver model and power-manageable drivers will prevent its
8173 (successful) use on most systems.
8175 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
8176 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
8177 tables" option, etc.
8179 Increased the default timeout for the EC driver from 1ms to 10ms
8180 (1000 cycles of 10us) to try to address AE_TIME errors during EC
8183 ----------------------------------------
8184 Summary of changes for this label: 11_02_01
8186 1) ACPI CA Core Subsystem:
8188 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
8189 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
8192 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
8193 changes to support ACPI 2.0 Qword field access. Read/Write
8194 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
8195 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
8196 the value parameter for the address space handler interface is now
8197 an ACPI_INTEGER. OSL implementations of these interfaces must now
8198 handle the case where the Width parameter is 64.
8200 Index Fields: Fixed a problem where unaligned bit assembly and
8201 disassembly for IndexFields was not supported correctly.
8203 Index and Bank Fields: Nested Index and Bank Fields are now
8204 supported. During field access, a check is performed to ensure
8205 that the value written to an Index or Bank register is not out of
8206 the range of the register. The Index (or Bank) register is
8207 written before each access to the field data. Future support will
8208 include allowing individual IndexFields to be wider than the
8211 Fields: Fixed a problem where the AML interpreter was incorrectly
8212 attempting to write beyond the end of a Field/OpRegion. This was
8213 a boundary case that occurred when a DWORD field was written to a
8214 BYTE access OpRegion, forcing multiple writes and causing the
8215 interpreter to write one datum too many.
8217 Fields: Fixed a problem with Field/OpRegion access where the
8218 starting bit address of a field was incorrectly calculated if the
8219 current access type was wider than a byte (WordAcc, DwordAcc, or
8222 Fields: Fixed a problem where forward references to individual
8223 FieldUnits (individual Field names within a Field definition) were
8224 not resolved during the AML table load.
8226 Fields: Fixed a problem where forward references from a Field
8227 definition to the parent Operation Region definition were not
8228 resolved during the AML table load.
8230 Fields: Duplicate FieldUnit names within a scope are now detected
8231 during AML table load.
8233 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
8234 returned an incorrect name for the root node.
8236 Code and Data Size: Code and Data optimizations have permitted new
8237 feature development with an actual reduction in the library size.
8238 Current core subsystem library sizes are shown below. These are
8239 the code and data sizes for the acpica.lib produced by the
8240 Microsoft Visual C++ 6.0 compiler, and these values do not include
8241 any ACPI driver or OSPM code. The debug version of the code
8242 includes the debug output trace mechanism and has a larger code
8243 and data size. Note that these values will vary depending on the
8244 efficiency of the compiler and the compiler options used during
8247 Previous Release (10_18_01):
8248 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8249 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8252 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8253 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8257 Improved /proc processor output (Pavel Machek) Re-added
8258 MODULE_LICENSE("GPL") to all modules.
8260 3) ASL Compiler version X2030:
8262 Duplicate FieldUnit names within a scope are now detected and
8267 Programmer Reference updated to reflect OSL and address space
8268 handler interface changes described above.
8270 ----------------------------------------
8271 Summary of changes for this label: 10_18_01
8273 ACPI CA Core Subsystem:
8275 Fixed a problem with the internal object reference count mechanism
8276 that occasionally caused premature object deletion. This resolves
8277 all of the outstanding problem reports where an object is deleted
8278 in the middle of an interpreter evaluation. Although this problem
8279 only showed up in rather obscure cases, the solution to the
8280 problem involved an adjustment of all reference counts involving
8281 objects attached to namespace nodes.
8283 Fixed a problem with Field support in the interpreter where
8284 writing to an aligned field whose length is an exact multiple (2
8285 or greater) of the field access granularity would cause an attempt
8286 to write beyond the end of the field.
8288 The top level AML opcode execution functions within the
8289 interpreter have been renamed with a more meaningful and
8290 consistent naming convention. The modules exmonad.c and
8291 exdyadic.c were eliminated. New modules are exoparg1.c,
8292 exoparg2.c, exoparg3.c, and exoparg6.c.
8294 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
8296 Fixed a problem where the AML debugger was causing some internal
8297 objects to not be deleted during subsystem termination.
8299 Fixed a problem with the external AcpiEvaluateObject interface
8300 where the subsystem would fault if the named object to be
8301 evaluated refered to a constant such as Zero, Ones, etc.
8303 Fixed a problem with IndexFields and BankFields where the
8304 subsystem would fault if the index, data, or bank registers were
8305 not defined in the same scope as the field itself.
8307 Added printf format string checking for compilers that support
8308 this feature. Corrected more than 50 instances of issues with
8309 format specifiers within invocations of ACPI_DEBUG_PRINT
8310 throughout the core subsystem code.
8312 The ASL "Revision" operator now returns the ACPI support level
8313 implemented in the core - the value "2" since the ACPI 2.0 support
8314 is more than 50% implemented.
8316 Enhanced the output of the AML debugger "dump namespace" command
8317 to output in a more human-readable form.
8319 Current core subsystem library code sizes are shown below. These
8321 are the code and data sizes for the acpica.lib produced by the
8322 Microsoft Visual C++ 6.0 compiler, and these values do not include
8323 any ACPI driver or OSPM code. The debug version of the code
8324 includes the full debug trace mechanism -- leading to a much
8326 larger code and data size. Note that these values will vary
8327 depending on the efficiency of the compiler and the compiler
8328 options used during generation.
8330 Previous Label (09_20_01):
8331 Non-Debug Version: 65K Code, 5K Data, 70K Total
8332 Debug Version: 138K Code, 58K Data, 196K Total
8336 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8337 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8341 Implemented a "Bad BIOS Blacklist" to track machines that have
8342 known ASL/AML problems.
8344 Enhanced the /proc interface for the thermal zone driver and added
8345 support for _HOT (the critical suspend trip point). The 'info'
8346 file now includes threshold/policy information, and allows setting
8347 of _SCP (cooling preference) and _TZP (polling frequency) values
8348 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
8349 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
8350 preference to the passive/quiet mode (if supported by the ASL).
8352 Implemented a workaround for a gcc bug that resuted in an OOPs
8353 when loading the control method battery driver.
8355 ----------------------------------------
8356 Summary of changes for this label: 09_20_01
8358 ACPI CA Core Subsystem:
8360 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
8361 modified to allow individual GPE levels to be flagged as wake-
8362 enabled (i.e., these GPEs are to remain enabled when the platform
8365 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
8366 support wake-enabled GPEs. This means that upon entering the
8367 sleep state, all GPEs that are not wake-enabled are disabled.
8368 When leaving the sleep state, these GPEs are reenabled.
8370 A local double-precision divide/modulo module has been added to
8371 enhance portability to OS kernels where a 64-bit math library is
8372 not available. The new module is "utmath.c".
8374 Several optimizations have been made to reduce the use of CPU
8375 stack. Originally over 2K, the maximum stack usage is now below
8376 2K at 1860 bytes (1.82k)
8378 Fixed a problem with the AcpiGetFirmwareTable interface where the
8379 root table pointer was not mapped into a logical address properly.
8381 Fixed a problem where a NULL pointer was being dereferenced in the
8382 interpreter code for the ASL Notify operator.
8384 Fixed a problem where the use of the ASL Revision operator
8385 returned an error. This operator now returns the current version
8386 of the ACPI CA core subsystem.
8388 Fixed a problem where objects passed as control method parameters
8389 to AcpiEvaluateObject were always deleted at method termination.
8390 However, these objects may end up being stored into the namespace
8391 by the called method. The object reference count mechanism was
8392 applied to these objects instead of a force delete.
8394 Fixed a problem where static strings or buffers (contained in the
8395 AML code) that are declared as package elements within the ASL
8396 code could cause a fault because the interpreter would attempt to
8397 delete them. These objects are now marked with the "static
8398 object" flag to prevent any attempt to delete them.
8400 Implemented an interpreter optimization to use operands directly
8401 from the state object instead of extracting the operands to local
8402 variables. This reduces stack use and code size, and improves
8405 The module exxface.c was eliminated as it was an unnecessary extra
8408 Current core subsystem library code sizes are shown below. These
8409 are the code and data sizes for the acpica.lib produced by the
8410 Microsoft Visual C++ 6.0 compiler, and these values do not include
8411 any ACPI driver or OSPM code. The debug version of the code
8412 includes the full debug trace mechanism -- leading to a much
8413 larger code and data size. Note that these values will vary
8414 depending on the efficiency of the compiler and the compiler
8415 options used during generation.
8417 Non-Debug Version: 65K Code, 5K Data, 70K Total
8418 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
8419 Total (Previously 195K)
8423 Support for ACPI 2.0 64-bit integers has been added. All ACPI
8424 Integer objects are now 64 bits wide
8426 All Acpi data types and structures are now in lower case. Only
8427 Acpi macros are upper case for differentiation.
8431 Changes to the external interfaces as described above.
8433 ----------------------------------------
8434 Summary of changes for this label: 08_31_01
8436 ACPI CA Core Subsystem:
8438 A bug with interpreter implementation of the ASL Divide operator
8439 was found and fixed. The implicit function return value (not the
8440 explicit store operands) was returning the remainder instead of
8441 the quotient. This was a longstanding bug and it fixes several
8442 known outstanding issues on various platforms.
8444 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
8445 been further optimized for size. There are 700 invocations of the
8446 DEBUG_PRINT macro alone, so each optimization reduces the size of
8447 the debug version of the subsystem significantly.
8449 A stack trace mechanism has been implemented. The maximum stack
8450 usage is about 2K on 32-bit platforms. The debugger command "stat
8451 stack" will display the current maximum stack usage.
8453 All public symbols and global variables within the subsystem are
8454 now prefixed with the string "Acpi". This keeps all of the
8455 symbols grouped together in a kernel map, and avoids conflicts
8456 with other kernel subsystems.
8458 Most of the internal fixed lookup tables have been moved into the
8459 code segment via the const operator.
8461 Several enhancements have been made to the interpreter to both
8462 reduce the code size and improve performance.
8464 Current core subsystem library code sizes are shown below. These
8465 are the code and data sizes for the acpica.lib produced by the
8466 Microsoft Visual C++ 6.0 compiler, and these values do not include
8467 any ACPI driver or OSPM code. The debug version of the code
8468 includes the full debug trace mechanism which contains over 700
8469 invocations of the DEBUG_PRINT macro, 500 function entry macro
8470 invocations, and over 900 function exit macro invocations --
8471 leading to a much larger code and data size. Note that these
8472 values will vary depending on the efficiency of the compiler and
8473 the compiler options used during generation.
8475 Non-Debug Version: 64K Code, 5K Data, 69K Total
8476 Debug Version: 137K Code, 58K Data, 195K Total
8480 Implemented wbinvd() macro, pending a kernel-wide definition.
8482 Fixed /proc/acpi/event to handle poll() and short reads.
8484 ASL Compiler, version X2026:
8486 Fixed a problem introduced in the previous label where the AML
8488 code emitted for package objects produced packages with zero
8491 ----------------------------------------
8492 Summary of changes for this label: 08_16_01
8494 ACPI CA Core Subsystem:
8496 The following ACPI 2.0 ASL operators have been implemented in the
8497 AML interpreter (These are already supported by the Intel ASL
8498 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
8499 ToBuffer. Support for 64-bit AML constants is implemented in the
8500 AML parser, debugger, and disassembler.
8502 The internal memory tracking mechanism (leak detection code) has
8503 been upgraded to reduce the memory overhead (a separate tracking
8504 block is no longer allocated for each memory allocation), and now
8505 supports all of the internal object caches.
8507 The data structures and code for the internal object caches have
8508 been coelesced and optimized so that there is a single cache and
8509 memory list data structure and a single group of functions that
8510 implement generic cache management. This has reduced the code
8511 size in both the debug and release versions of the subsystem.
8513 The DEBUG_PRINT macro(s) have been optimized for size and replaced
8514 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
8515 different, because it generates a single call to an internal
8516 function. This results in a savings of about 90 bytes per
8517 invocation, resulting in an overall code and data savings of about
8518 16% in the debug version of the subsystem.
8522 Fixed C3 disk corruption problems and re-enabled C3 on supporting
8525 Integrated low-level sleep code by Patrick Mochel.
8527 Further tweaked source code Linuxization.
8533 Support for ACPI 2.0 variable length packages is fixed/completed.
8535 Fixed a problem where the optional length parameter for the ACPI
8536 2.0 ToString operator.
8538 Fixed multiple extraneous error messages when a syntax error is
8539 detected within the declaration line of a control method.
8541 ----------------------------------------
8542 Summary of changes for this label: 07_17_01
8544 ACPI CA Core Subsystem:
8546 Added a new interface named AcpiGetFirmwareTable to obtain any
8547 ACPI table via the ACPI signature. The interface can be called at
8548 any time during kernel initialization, even before the kernel
8549 virtual memory manager is initialized and paging is enabled. This
8550 allows kernel subsystems to obtain ACPI tables very early, even
8551 before the ACPI CA subsystem is initialized.
8553 Fixed a problem where Fields defined with the AnyAcc attribute
8554 could be resolved to the incorrect address under the following
8555 conditions: 1) the field width is larger than 8 bits and 2) the
8556 parent operation region is not defined on a DWORD boundary.
8558 Fixed a problem where the interpreter is not being locked during
8559 namespace initialization (during execution of the _INI control
8560 methods), causing an error when an attempt is made to release it
8563 ACPI 2.0 support in the AML Interpreter has begun and will be
8564 ongoing throughout the rest of this year. In this label, The Mod
8565 operator is implemented.
8567 Added a new data type to contain full PCI addresses named
8568 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
8569 and Function values.
8573 Enhanced the Linux version of the source code to change most
8574 capitalized ACPI type names to lowercase. For example, all
8575 instances of ACPI_STATUS are changed to acpi_status. This will
8576 result in a large diff, but the change is strictly cosmetic and
8577 aligns the CA code closer to the Linux coding standard.
8581 The interfaces to the PCI configuration space have been changed to
8582 add the PCI Segment number and to split the single 32-bit combined
8583 DeviceFunction field into two 16-bit fields. This was
8584 accomplished by moving the four values that define an address in
8585 PCI configuration space (segment, bus, device, and function) to
8586 the new ACPI_PCI_ID structure.
8588 The changes to the PCI configuration space interfaces led to a
8589 reexamination of the complete set of address space access
8590 interfaces for PCI, I/O, and Memory. The previously existing 18
8591 interfaces have proven difficult to maintain (any small change
8592 must be propagated across at least 6 interfaces) and do not easily
8593 allow for future expansion to 64 bits if necessary. Also, on some
8594 systems, it would not be appropriate to demultiplex the access
8595 width (8, 16, 32,or 64) before calling the OSL if the
8596 corresponding native OS interfaces contain a similar access width
8597 parameter. For these reasons, the 18 address space interfaces
8598 have been replaced by these 6 new ones:
8600 AcpiOsReadPciConfiguration
8601 AcpiOsWritePciConfiguration
8607 Added a new interface named AcpiOsGetRootPointer to allow the OSL
8608 to perform the platform and/or OS-specific actions necessary to
8609 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
8610 interface will simply call down to the CA core to perform the low-
8611 memory search for the table. On IA-64, the RSDP is obtained from
8612 EFI. Migrating this interface to the OSL allows the CA core to
8614 remain OS and platform independent.
8616 Added a new interface named AcpiOsSignal to provide a generic
8617 "function code and pointer" interface for various miscellaneous
8618 signals and notifications that must be made to the host OS. The
8619 first such signals are intended to support the ASL Fatal and
8620 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
8621 interface has been obsoleted.
8623 The definition of the AcpiFormatException interface has been
8624 changed to simplify its use. The caller no longer must supply a
8625 buffer to the call; A pointer to a const string is now returned
8626 directly. This allows the call to be easily used in printf
8627 statements, etc. since the caller does not have to manage a local
8631 ASL Compiler, Version X2025:
8633 The ACPI 2.0 Switch/Case/Default operators have been implemented
8634 and are fully functional. They will work with all ACPI 1.0
8635 interpreters, since the operators are simply translated to If/Else
8638 The ACPI 2.0 ElseIf operator is implemented and will also work
8639 with 1.0 interpreters, for the same reason.
8641 Implemented support for ACPI 2.0 variable-length packages. These
8642 packages have a separate opcode, and their size is determined by
8643 the interpreter at run-time.
8645 Documentation The ACPI CA Programmer Reference has been updated to
8646 reflect the new interfaces and changes to existing interfaces.
8648 ------------------------------------------
8649 Summary of changes for this label: 06_15_01
8651 ACPI CA Core Subsystem:
8653 Fixed a problem where a DWORD-accessed field within a Buffer
8654 object would get its byte address inadvertently rounded down to
8655 the nearest DWORD. Buffers are always Byte-accessible.
8657 ASL Compiler, version X2024:
8659 Fixed a problem where the Switch() operator would either fault or
8660 hang the compiler. Note however, that the AML code for this ACPI
8661 2.0 operator is not yet implemented.
8663 Compiler uses the new AcpiOsGetTimer interface to obtain compile
8666 Implementation of the CreateField operator automatically converts
8667 a reference to a named field within a resource descriptor from a
8668 byte offset to a bit offset if required.
8670 Added some missing named fields from the resource descriptor
8671 support. These are the names that are automatically created by the
8672 compiler to reference fields within a descriptor. They are only
8673 valid at compile time and are not passed through to the AML
8676 Resource descriptor named fields are now typed as Integers and
8677 subject to compile-time typechecking when used in expressions.
8679 ------------------------------------------
8680 Summary of changes for this label: 05_18_01
8682 ACPI CA Core Subsystem:
8684 Fixed a couple of problems in the Field support code where bits
8685 from adjacent fields could be returned along with the proper field
8686 bits. Restructured the field support code to improve performance,
8687 readability and maintainability.
8689 New DEBUG_PRINTP macro automatically inserts the procedure name
8690 into the output, saving hundreds of copies of procedure name
8691 strings within the source, shrinking the memory footprint of the
8692 debug version of the core subsystem.
8694 Source Code Structure:
8696 The source code directory tree was restructured to reflect the
8697 current organization of the component architecture. Some files
8698 and directories have been moved and/or renamed.
8702 Fixed leaking kacpidpc processes.
8704 Fixed queueing event data even when /proc/acpi/event is not
8707 ASL Compiler, version X2020:
8709 Memory allocation performance enhancement - over 24X compile time
8710 improvement on large ASL files. Parse nodes and namestring
8711 buffers are now allocated from a large internal compiler buffer.
8713 The temporary .SRC file is deleted unless the "-s" option is
8716 The "-d" debug output option now sends all output to the .DBG file
8717 instead of the console.
8719 "External" second parameter is now optional
8721 "ElseIf" syntax now properly allows the predicate
8723 Last operand to "Load" now recognized as a Target operand
8725 Debug object can now be used anywhere as a normal object.
8727 ResourceTemplate now returns an object of type BUFFER
8729 EISAID now returns an object of type INTEGER
8731 "Index" now works with a STRING operand
8733 "LoadTable" now accepts optional parameters
8735 "ToString" length parameter is now optional
8737 "Interrupt (ResourceType," parse error fixed.
8739 "Register" with a user-defined region space parse error fixed
8741 Escaped backslash at the end of a string ("\\") scan/parse error
8744 "Revision" is now an object of type INTEGER.
8748 ------------------------------------------
8749 Summary of changes for this label: 05_02_01
8753 /proc/acpi/event now blocks properly.
8755 Removed /proc/sys/acpi. You can still dump your DSDT from
8758 ACPI CA Core Subsystem:
8760 Fixed a problem introduced in the previous label where some of the
8761 "small" resource descriptor types were not recognized.
8763 Improved error messages for the case where an ASL Field is outside
8764 the range of the parent operation region.
8766 ASL Compiler, version X2018:
8769 Added error detection for ASL Fields that extend beyond the length
8770 of the parent operation region (only if the length of the region
8771 is known at compile time.) This includes fields that have a
8772 minimum access width that is smaller than the parent region, and
8773 individual field units that are partially or entirely beyond the
8774 extent of the parent.
8778 ------------------------------------------
8779 Summary of changes for this label: 04_27_01
8781 ACPI CA Core Subsystem:
8783 Fixed a problem where the namespace mutex could be released at the
8784 wrong time during execution of AcpiRemoveAddressSpaceHandler.
8786 Added optional thread ID output for debug traces, to simplify
8787 debugging of multiple threads. Added context switch notification
8788 when the debug code realizes that a different thread is now
8789 executing ACPI code.
8791 Some additional external data types have been prefixed with the
8792 string "ACPI_" for consistency. This may effect existing code.
8793 The data types affected are the external callback typedefs - e.g.,
8795 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
8799 Fixed an issue with the OSL semaphore implementation where a
8800 thread was waking up with an error from receiving a SIGCHLD
8803 Linux version of ACPI CA now uses the system C library for string
8804 manipulation routines instead of a local implementation.
8806 Cleaned up comments and removed TBDs.
8808 ASL Compiler, version X2017:
8810 Enhanced error detection and reporting for all file I/O
8815 Programmer Reference updated to version 1.06.
8819 ------------------------------------------
8820 Summary of changes for this label: 04_13_01
8822 ACPI CA Core Subsystem:
8824 Restructured support for BufferFields and RegionFields.
8825 BankFields support is now fully operational. All known 32-bit
8826 limitations on field sizes have been removed. Both BufferFields
8827 and (Operation) RegionFields are now supported by the same field
8830 Resource support now supports QWORD address and IO resources. The
8831 16/32/64 bit address structures and the Extended IRQ structure
8832 have been changed to properly handle Source Resource strings.
8834 A ThreadId of -1 is now used to indicate a "mutex not acquired"
8835 condition internally and must never be returned by AcpiOsThreadId.
8836 This reserved value was changed from 0 since Unix systems allow a
8841 Driver code reorganized to enhance portability
8843 Added a kernel configuration option to control ACPI_DEBUG
8845 Fixed the EC driver to honor _GLK.
8847 ASL Compiler, version X2016:
8849 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
8850 address space was set to 0, not 0x7f as it should be.
8852 ------------------------------------------
8853 Summary of changes for this label: 03_13_01
8855 ACPI CA Core Subsystem:
8857 During ACPI initialization, the _SB_._INI method is now run if
8860 Notify handler fix - notifies are deferred until the parent method
8861 completes execution. This fixes the "mutex already acquired"
8862 issue seen occasionally.
8864 Part of the "implicit conversion" rules in ACPI 2.0 have been
8865 found to cause compatibility problems with existing ASL/AML. The
8866 convert "result-to-target-type" implementation has been removed
8867 for stores to method Args and Locals. Source operand conversion
8868 is still fully implemented. Possible changes to ACPI 2.0
8869 specification pending.
8871 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
8874 Fix for compiler warnings for 64-bit compiles.
8878 /proc output aligned for easier parsing.
8880 Release-version compile problem fixed.
8882 New kernel configuration options documented in Configure.help.
8884 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
8889 Power resource driver integrated with bus manager.
8891 Fixed kernel fault during active cooling for thermal zones.
8895 The source code tree has been restructured.
8899 ------------------------------------------
8900 Summary of changes for this label: 03_02_01
8902 Linux OS Services Layer (OSL):
8904 Major revision of all Linux-specific code.
8906 Modularized all ACPI-specific drivers.
8908 Added new thermal zone and power resource drivers.
8910 Revamped /proc interface (new functionality is under /proc/acpi).
8912 New kernel configuration options.
8916 New kernel configuration options not documented in Configure.help
8920 Module dependencies not currently implemented. If used, they
8921 should be loaded in this order: busmgr, power, ec, system,
8922 processor, battery, ac_adapter, button, thermal.
8924 Modules will not load if CONFIG_MODVERSION is set.
8926 IBM 600E - entering S5 may reboot instead of shutting down.
8928 IBM 600E - Sleep button may generate "Invalid <NULL> context"
8931 Some systems may fail with "execution mutex already acquired"
8934 ACPI CA Core Subsystem:
8936 Added a new OSL Interface, AcpiOsGetThreadId. This was required
8937 for the deadlock detection code. Defined to return a non-zero, 32-
8938 bit thread ID for the currently executing thread. May be a non-
8939 zero constant integer on single-thread systems.
8941 Implemented deadlock detection for internal subsystem mutexes. We
8942 may add conditional compilation for this code (debug only) later.
8944 ASL/AML Mutex object semantics are now fully supported. This
8945 includes multiple acquires/releases by owner and support for the
8947 Mutex SyncLevel parameter.
8949 A new "Force Release" mechanism automatically frees all ASL
8950 Mutexes that have been acquired but not released when a thread
8951 exits the interpreter. This forces conformance to the ACPI spec
8952 ("All mutexes must be released when an invocation exits") and
8953 prevents deadlocked ASL threads. This mechanism can be expanded
8954 (later) to monitor other resource acquisitions if OEM ASL code
8955 continues to misbehave (which it will).
8957 Several new ACPI exception codes have been added for the Mutex
8960 Recursive method calls are now allowed and supported (the ACPI
8961 spec does in fact allow recursive method calls.) The number of
8962 recursive calls is subject to the restrictions imposed by the
8963 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
8966 Implemented support for the SyncLevel parameter for control
8967 methods (ACPI 2.0 feature)
8969 Fixed a deadlock problem when multiple threads attempted to use
8972 Fixed a problem where the string length of a String package
8973 element was not always set in a package returned from
8976 Fixed a problem where the length of a String package element was
8977 not always included in the length of the overall package returned
8978 from AcpiEvaluateObject.
8980 Added external interfaces (Acpi*) to the ACPI debug memory
8981 manager. This manager keeps a list of all outstanding
8982 allocations, and can therefore detect memory leaks and attempts to
8983 free memory blocks more than once. Useful for code such as the
8984 power manager, etc. May not be appropriate for device drivers.
8985 Performance with the debug code enabled is slow.
8987 The ACPI Global Lock is now an optional hardware element.
8989 ASL Compiler Version X2015:
8991 Integrated changes to allow the compiler to be generated on
8994 Linux makefile added to generate the compiler on Linux
8998 All platform-specific headers have been moved to their own
8999 subdirectory, Include/Platform.
9001 New source file added, Interpreter/ammutex.c
9003 New header file, Include/acstruct.h
9007 The programmer reference has been updated for the following new
9008 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
9010 ------------------------------------------
9011 Summary of changes for this label: 02_08_01
9013 Core ACPI CA Subsystem: Fixed a problem where an error was
9014 incorrectly returned if the return resource buffer was larger than
9015 the actual data (in the resource interfaces).
9017 References to named objects within packages are resolved to the
9019 full pathname string before packages are returned directly (via
9020 the AcpiEvaluateObject interface) or indirectly via the resource
9023 Linux OS Services Layer (OSL):
9025 Improved /proc battery interface.
9028 Added C-state debugging output and other miscellaneous fixes.
9030 ASL Compiler Version X2014:
9032 All defined method arguments can now be used as local variables,
9033 including the ones that are not actually passed in as parameters.
9034 The compiler tracks initialization of the arguments and issues an
9035 exception if they are used without prior assignment (just like
9038 The -o option now specifies a filename prefix that is used for all
9039 output files, including the AML output file. Otherwise, the
9040 default behavior is as follows: 1) the AML goes to the file
9041 specified in the DSDT. 2) all other output files use the input
9042 source filename as the base.
9044 ------------------------------------------
9045 Summary of changes for this label: 01_25_01
9047 Core ACPI CA Subsystem: Restructured the implementation of object
9048 store support within the interpreter. This includes support for
9049 the Store operator as well as any ASL operators that include a
9052 Partially implemented support for Implicit Result-to-Target
9053 conversion. This is when a result object is converted on the fly
9054 to the type of an existing target object. Completion of this
9055 support is pending further analysis of the ACPI specification
9056 concerning this matter.
9058 CPU-specific code has been removed from the subsystem (hardware
9061 New Power Management Timer functions added
9063 Linux OS Services Layer (OSL): Moved system state transition code
9064 to the core, fixed it, and modified Linux OSL accordingly.
9066 Fixed C2 and C3 latency calculations.
9069 We no longer use the compilation date for the version message on
9070 initialization, but retrieve the version from AcpiGetSystemInfo().
9072 Incorporated for fix Sony VAIO machines.
9074 Documentation: The Programmer Reference has been updated and
9078 ASL Compiler: Version X2013: Fixed a problem where the line
9079 numbering and error reporting could get out of sync in the
9080 presence of multiple include files.
9082 ------------------------------------------
9083 Summary of changes for this label: 01_15_01
9085 Core ACPI CA Subsystem:
9087 Implemented support for type conversions in the execution of the
9088 ASL Concatenate operator (The second operand is converted to
9089 match the type of the first operand before concatenation.)
9091 Support for implicit source operand conversion is partially
9092 implemented. The ASL source operand types Integer, Buffer, and
9093 String are freely interchangeable for most ASL operators and are
9094 converted by the interpreter on the fly as required. Implicit
9095 Target operand conversion (where the result is converted to the
9096 target type before storing) is not yet implemented.
9098 Support for 32-bit and 64-bit BCD integers is implemented.
9100 Problem fixed where a field read on an aligned field could cause a
9101 read past the end of the field.
9103 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
9104 does not return a value, but the caller expects one. (The ASL
9105 compiler flags this as a warning.)
9110 1. Static typechecking of all operands is implemented. This
9111 prevents the use of invalid objects (such as using a Package where
9112 an Integer is required) at compile time instead of at interpreter
9114 2. The ASL source line is printed with ALL errors and warnings.
9115 3. Bug fix for source EOF without final linefeed.
9116 4. Debug option is split into a parse trace and a namespace trace.
9117 5. Namespace output option (-n) includes initial values for
9118 integers and strings.
9119 6. Parse-only option added for quick syntax checking.
9120 7. Compiler checks for duplicate ACPI name declarations
9123 1. Relaxed typechecking to allow interchangeability between
9124 strings, integers, and buffers. These types are now converted by
9125 the interpreter at runtime.
9126 2. Compiler reports time taken by each internal subsystem in the
9130 ------------------------------------------
9131 Summary of changes for this label: 12_14_00
9135 This is the first official release of the compiler. Since the
9136 compiler requires elements of the Core Subsystem, this label
9137 synchronizes everything.
9139 ------------------------------------------
9140 Summary of changes for this label: 12_08_00
9143 Fixed a problem where named references within the ASL definition
9144 of both OperationRegions and CreateXXXFields did not work
9145 properly. The symptom was an AE_AML_OPERAND_TYPE during
9146 initialization of the region/field. This is similar (but not
9147 related internally) to the problem that was fixed in the last
9150 Implemented both 32-bit and 64-bit support for the BCD ASL
9151 functions ToBCD and FromBCD.
9153 Updated all legal headers to include "2000" in the copyright
9156 ------------------------------------------
9157 Summary of changes for this label: 12_01_00
9159 Fixed a problem where method invocations within the ASL definition
9160 of both OperationRegions and CreateXXXFields did not work
9161 properly. The symptom was an AE_AML_OPERAND_TYPE during
9162 initialization of the region/field:
9164 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
9165 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
9168 Fixed a problem where operators with more than one nested
9169 subexpression would fail. The symptoms were varied, by mostly
9170 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
9171 problem that has gone unnoticed until now.
9173 Subtract (Add (1,2), Multiply (3,4))
9175 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
9176 previous build (The prefix part of a relative path was handled
9179 Fixed a problem where Operation Region initialization failed if
9180 the operation region name was a "namepath" instead of a simple
9181 "nameseg". Symptom was an AE_NO_OPERAND error.
9183 Fixed a problem where an assignment to a local variable via the
9184 indirect RefOf mechanism only worked for the first such
9185 assignment. Subsequent assignments were ignored.
9187 ------------------------------------------
9188 Summary of changes for this label: 11_15_00
9190 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
9191 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
9192 the AML interpreter does NOT have support for the new 2.0 ASL
9193 grammar terms at this time.
9195 All ACPI hardware access is via the GAS structures in the ACPI 2.0
9198 All physical memory addresses across all platforms are now 64 bits
9199 wide. Logical address width remains dependent on the platform
9202 AcpiOsMapMemory interface changed to a 64-bit physical address.
9204 The AML interpreter integer size is now 64 bits, as per the ACPI
9207 For backwards compatibility with ACPI 1.0, ACPI tables with a
9208 revision number less than 2 use 32-bit integers only.
9210 Fixed a problem where the evaluation of OpRegion operands did not
9211 always resolve them to numbers properly.
9213 ------------------------------------------
9214 Summary of changes for this label: 10_20_00
9216 Fix for CBN_._STA issue. This fix will allow correct access to
9217 CBN_ OpRegions when the _STA returns 0x8.
9219 Support to convert ACPI constants (Ones, Zeros, One) to actual
9220 values before a package object is returned
9222 Fix for method call as predicate to if/while construct causing
9223 incorrect if/while behavior
9225 Fix for Else block package lengths sometimes calculated wrong (if
9228 Fix for Processor object length field, was always zero
9230 Table load abort if FACP sanity check fails
9232 Fix for problem with Scope(name) if name already exists
9234 Warning emitted if a named object referenced cannot be found
9235 (resolved) during method execution.
9241 ------------------------------------------
9242 Summary of changes for this label: 9_29_00
9244 New table initialization interfaces: AcpiInitializeSubsystem no
9245 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
9246 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
9247 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
9250 Note: These interface changes require changes to all existing OSDs
9252 The PCI_Config default address space handler is always installed
9253 at the root namespace object.
9255 -------------------------------------------
9256 Summary of changes for this label: 09_15_00
9258 The new initialization architecture is implemented. New
9259 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
9260 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
9262 (Namespace is automatically loaded when a table is loaded)
9264 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
9265 52 bytes to 32 bytes. There is usually one of these for every
9266 namespace object, so the memory savings is significant.
9268 Implemented just-in-time evaluation of the CreateField operators.
9270 Bug fixes for IA-64 support have been integrated.
9272 Additional code review comments have been implemented
9274 The so-called "third pass parse" has been replaced by a final walk
9275 through the namespace to initialize all operation regions (address
9276 spaces) and fields that have not yet been initialized during the
9277 execution of the various _INI and REG methods.
9279 New file - namespace/nsinit.c
9281 -------------------------------------------
9282 Summary of changes for this label: 09_01_00
9284 Namespace manager data structures have been reworked to change the
9285 primary object from a table to a single object. This has
9286 resulted in dynamic memory savings of 3X within the namespace and
9287 2X overall in the ACPI CA subsystem.
9289 Fixed problem where the call to AcpiEvFindPciRootBuses was
9290 inadvertently left commented out.
9292 Reduced the warning count when generating the source with the GCC
9295 Revision numbers added to each module header showing the
9296 SourceSafe version of the file. Please refer to this version
9297 number when giving us feedback or comments on individual modules.
9299 The main object types within the subsystem have been renamed to
9300 clarify their purpose:
9302 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
9303 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
9304 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
9306 NOTE: no changes to the initialization sequence are included in
9309 -------------------------------------------
9310 Summary of changes for this label: 08_23_00
9312 Fixed problem where TerminateControlMethod was being called
9313 multiple times per method
9315 Fixed debugger problem where single stepping caused a semaphore to
9318 Improved performance through additional parse object caching -
9319 added ACPI_EXTENDED_OP type
9321 -------------------------------------------
9322 Summary of changes for this label: 08_10_00
9324 Parser/Interpreter integration: Eliminated the creation of
9325 complete parse trees for ACPI tables and control methods.
9326 Instead, parse subtrees are created and then deleted as soon as
9327 they are processed (Either entered into the namespace or executed
9328 by the interpreter). This reduces the use of dynamic kernel
9329 memory significantly. (about 10X)
9331 Exception codes broken into classes and renumbered. Be sure to
9332 recompile all code that includes acexcep.h. Hopefully we won't
9333 have to renumber the codes again now that they are split into
9334 classes (environment, programmer, AML code, ACPI table, and
9337 Fixed some additional alignment issues in the Resource Manager
9340 Implemented semaphore tracking in the AcpiExec utility, and fixed
9341 several places where mutexes/semaphores were being unlocked
9342 without a corresponding lock operation. There are no known
9343 semaphore or mutex "leaks" at this time.
9345 Fixed the case where an ASL Return operator is used to return an
9348 -------------------------------------------
9349 Summary of changes for this label: 07_28_00
9351 Fixed a problem with the way addresses were calculated in
9352 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
9353 manifested itself when a Field was created with WordAccess or
9354 DwordAccess, but the field unit defined within the Field was less
9356 than a Word or Dword.
9358 Fixed a problem in AmlDumpOperands() module's loop to pull
9359 operands off of the operand stack to display information. The
9360 problem manifested itself as a TLB error on 64-bit systems when
9361 accessing an operand stack with two or more operands.
9363 Fixed a problem with the PCI configuration space handlers where
9364 context was getting confused between accesses. This required a
9365 change to the generic address space handler and address space
9366 setup definitions. Handlers now get both a global handler context
9367 (this is the one passed in by the user when executing
9368 AcpiInstallAddressSpaceHandler() and a specific region context
9369 that is unique to each region (For example, the _ADR, _SEG and
9370 _BBN values associated with a specific region). The generic
9371 function definitions have changed to the following:
9373 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
9374 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
9375 *HandlerContext, // This used to be void *Context void
9376 *RegionContext); // This is an additional parameter
9378 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
9379 RegionHandle, UINT32 Function, void *HandlerContext, void
9380 **RegionContext); // This used to be **ReturnContext
9382 -------------------------------------------
9383 Summary of changes for this label: 07_21_00
9385 Major file consolidation and rename. All files within the
9386 interpreter have been renamed as well as most header files. This
9387 was done to prevent collisions with existing files in the host
9388 OSs -- filenames such as "config.h" and "global.h" seem to be
9389 quite common. The VC project files have been updated. All
9390 makefiles will require modification.
9392 The parser/interpreter integration continues in Phase 5 with the
9393 implementation of a complete 2-pass parse (the AML is parsed
9394 twice) for each table; This avoids the construction of a huge
9395 parse tree and therefore reduces the amount of dynamic memory
9396 required by the subsystem. Greater use of the parse object cache
9397 means that performance is unaffected.
9399 Many comments from the two code reviews have been rolled in.
9401 The 64-bit alignment support is complete.
9403 -------------------------------------------
9404 Summary of changes for this label: 06_30_00
9406 With a nod and a tip of the hat to the technology of yesteryear,
9407 we've added support in the source code for 80 column output
9408 devices. The code is now mostly constrained to 80 columns or
9409 less to support environments and editors that 1) cannot display
9410 or print more than 80 characters on a single line, and 2) cannot
9411 disable line wrapping.
9413 A major restructuring of the namespace data structure has been
9414 completed. The result is 1) cleaner and more
9415 understandable/maintainable code, and 2) a significant reduction
9416 in the dynamic memory requirement for each named ACPI object
9419 -------------------------------------------
9420 Summary of changes for this label: 06_23_00
9422 Linux support has been added. In order to obtain approval to get
9423 the ACPI CA subsystem into the Linux kernel, we've had to make
9424 quite a few changes to the base subsystem that will affect all
9425 users (all the changes are generic and OS- independent). The
9426 effects of these global changes have been somewhat far reaching.
9427 Files have been merged and/or renamed and interfaces have been
9428 renamed. The major changes are described below.
9430 Osd* interfaces renamed to AcpiOs* to eliminate namespace
9431 pollution/confusion within our target kernels. All OSD
9432 interfaces must be modified to match the new naming convention.
9434 Files merged across the subsystem. A number of the smaller source
9435 and header files have been merged to reduce the file count and
9436 increase the density of the existing files. There are too many
9437 to list here. In general, makefiles that call out individual
9438 files will require rebuilding.
9440 Interpreter files renamed. All interpreter files now have the
9441 prefix am* instead of ie* and is*.
9443 Header files renamed: The acapi.h file is now acpixf.h. The
9444 acpiosd.h file is now acpiosxf.h. We are removing references to
9445 the acronym "API" since it is somewhat windowsy. The new name is
9446 "external interface" or xface or xf in the filenames.j
9449 All manifest constants have been forced to upper case (some were
9450 mixed case.) Also, the string "ACPI_" has been prepended to many
9451 (not all) of the constants, typedefs, and structs.
9453 The globals "DebugLevel" and "DebugLayer" have been renamed
9454 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
9456 All other globals within the subsystem are now prefixed with
9457 "AcpiGbl_" Internal procedures within the subsystem are now
9458 prefixed with "Acpi" (with only a few exceptions). The original
9459 two-letter abbreviation for the subcomponent remains after "Acpi"
9460 - for example, CmCallocate became AcpiCmCallocate.
9462 Added a source code translation/conversion utility. Used to
9463 generate the Linux source code, it can be modified to generate
9464 other types of source as well. Can also be used to cleanup
9465 existing source by removing extraneous spaces and blank lines.
9466 Found in tools/acpisrc/*
9468 OsdUnMapMemory was renamed to OsdUnmapMemory and then
9469 AcpiOsUnmapMemory. (UnMap became Unmap).
9471 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
9472 When set to one, this indicates that the caller wants to use the
9474 semaphore as a mutex, not a counting semaphore. ACPI CA uses
9475 both types. However, implementers of this call may want to use
9476 different OS primitives depending on the type of semaphore
9477 requested. For example, some operating systems provide separate
9479 "mutex" and "semaphore" interfaces - where the mutex interface is
9480 much faster because it doesn't have all the overhead of a full
9481 semaphore implementation.
9483 Fixed a deadlock problem where a method that accesses the PCI
9484 address space can block forever if it is the first access to the
9487 -------------------------------------------
9488 Summary of changes for this label: 06_02_00
9490 Support for environments that cannot handle unaligned data
9491 accesses (e.g. firmware and OS environments devoid of alignment
9492 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
9493 been added (via configurable macros) in these three areas: -
9494 Transfer of data from the raw AML byte stream is done via byte
9495 moves instead of word/dword/qword moves. - External objects are
9496 aligned within the user buffer, including package elements (sub-
9497 objects). - Conversion of name strings to UINT32 Acpi Names is now
9500 The Store operator was modified to mimic Microsoft's
9501 implementation when storing to a Buffer Field.
9503 Added a check of the BM_STS bit before entering C3.
9505 The methods subdirectory has been obsoleted and removed. A new
9506 file, cmeval.c subsumes the functionality.
9508 A 16-bit (DOS) version of AcpiExec has been developed. The
9509 makefile is under the acpiexec directory.