1 ----------------------------------------
2 13 October 2010. Summary of changes for version 20101013:
4 This release is available at www.acpica.org/downloads
6 1) ACPI CA Core Subsystem:
8 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events, now
9 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
10 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
12 Changed the type of the predefined namespace object _TZ from ThermalZone to
13 Device. This was found to be confusing to the host software that processes
14 the various thermal zones, since _TZ is not really a ThermalZone. However, a
15 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
18 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
19 string is "Windows 2006 SP2".
21 Eliminated duplicate code in AcpiUtExecute* functions. Now that the nsrepair
22 code automatically repairs _HID-related strings, this type of code is no
23 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ 878.
25 Example Code and Data Size: These are the sizes for the OS-independent
26 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
27 debug version of the code includes the debug output trace mechanism and has a
28 much larger code and data size.
31 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
32 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
34 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
35 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
37 2) iASL Compiler/Disassembler and Tools:
39 iASL: Implemented additional compile-time validation for _HID strings. The
40 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the length of
41 the string must be exactly seven or eight characters. For both _HID and _CID
42 strings, all characters must be alphanumeric. ACPICA BZ 874.
44 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
45 descriptors that are mostly or all zeros, with the expectation that they will
46 be filled in at runtime. iASL now allows this as long as there is a "resource
47 tag" (name) associated with the descriptor, which gives the ASL a handle
48 needed to modify the descriptor. ACPICA BZ 873.
50 Added single-thread support to the generic Unix application OSL. Primarily
51 for iASL support, this change removes the use of semaphores in the single-
52 threaded ACPICA tools/applications - increasing performance. The
53 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
54 option. ACPICA BZ 879.
56 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and support
57 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
59 iASL: Moved all compiler messages to a new file, aslmessages.h.
61 ----------------------------------------
62 15 September 2010. Summary of changes for version 20100915:
64 This release is available at www.acpica.org/downloads
66 1) ACPI CA Core Subsystem:
68 Removed the AcpiOsDerivePciId OSL interface. The various host implementations
69 of this function were not OS-dependent and are now obsolete and can be
70 removed from all host OSLs. This function has been replaced by
71 AcpiHwDerivePciId, which is now part of the ACPICA core code.
72 AcpiHwDerivePciId has been implemented without recursion. Adds one new
73 module, hwpci.c. ACPICA BZ 857.
75 Implemented a dynamic repair for _HID and _CID strings. The following
76 problems are now repaired at runtime: 1) Remove a leading asterisk in the
77 string, and 2) the entire string is uppercased. Both repairs are in
78 accordance with the ACPI specification and will simplify host driver code.
81 The ACPI_THREAD_ID type is no longer configurable, internally it is now
82 always UINT64. This simplifies the ACPICA code, especially any printf output.
83 UINT64 is the only common data type for all thread_id types across all
84 operating systems. It is now up to the host OSL to cast the native thread_id
85 type to UINT64 before returning the value to ACPICA (via AcpiOsGetThreadId).
88 Added the ACPI_INLINE type to enhance the ACPICA configuration. The "inline"
89 keyword is not standard across compilers, and this type allows inline to be
90 configured on a per-compiler basis. Lin Ming.
92 Made the system global AcpiGbl_SystemAwakeAndRunning publically available.
93 Added an extern for this boolean in acpixf.h. Some hosts utilize this value
94 during suspend/restore operations. ACPICA BZ 869.
96 All code that implements error/warning messages with the "ACPI:" prefix has
97 been moved to a new module, utxferror.c.
99 The UINT64_OVERLAY was moved to utmath.c, which is the only module where it
100 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
102 Example Code and Data Size: These are the sizes for the OS-independent
103 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
104 debug version of the code includes the debug output trace mechanism and has a
105 much larger code and data size.
108 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
109 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
111 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
112 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
114 2) iASL Compiler/Disassembler and Tools:
116 iASL/Disassembler: Write ACPI errors to stderr instead of the output file.
117 This keeps the output files free of random error messages that may originate
118 from within the namespace/interpreter code. Used this opportunity to merge
119 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
120 866. Lin Ming, Bob Moore.
122 Tools: update some printfs for ansi warnings on size_t. Handle width change
123 of size_t on 32-bit versus 64-bit generations. Lin Ming.
125 ----------------------------------------
126 06 August 2010. Summary of changes for version 20100806:
128 1) ACPI CA Core Subsystem:
130 Designed and implemented a new host interface to the _OSI support code. This
131 will allow the host to dynamically add or remove multiple _OSI strings, as
132 well as install an optional handler that is called for each _OSI invocation.
133 Also added a new AML debugger command, 'osi' to display and modify the global
134 _OSI string table, and test support in the AcpiExec utility. See the ACPICA
135 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
137 AcpiInstallInterface - Add an _OSI string.
138 AcpiRemoveInterface - Delete an _OSI string.
139 AcpiInstallInterfaceHandler - Install optional _OSI handler.
141 AcpiOsValidateInterface - no longer used.
143 source/components/utilities/utosi.c
145 Re-introduced the support to enable multi-byte transfers for Embedded
146 Controller (EC) operation regions. A reported problem was found to be a bug
147 in the host OS, not in the multi-byte support. Previously, the maximum data
148 size passed to the EC operation region handler was a single byte. There are
149 often EC Fields larger than one byte that need to be transferred, and it is
150 useful for the EC driver to lock these as a single transaction. This change
151 enables single transfers larger than 8 bits. This effectively changes the
152 access to the EC space from ByteAcc to AnyAcc, and will probably require
153 changes to the host OS Embedded Controller driver to enable 16/32/64/256-bit
154 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
156 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
157 prototype in acpiosxf.h had the output value pointer as a (void *).
158 It should be a (UINT64 *). This may affect some host OSL code.
160 Fixed a couple problems with the recently modified Linux makefiles for iASL
161 and AcpiExec. These new makefiles place the generated object files in the
162 local directory so that there can be no collisions between the files that are
163 shared between them that are compiled with different options.
165 Example Code and Data Size: These are the sizes for the OS-independent
166 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
167 debug version of the code includes the debug output trace mechanism and has a
168 much larger code and data size.
171 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
172 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
174 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
175 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
177 2) iASL Compiler/Disassembler and Tools:
179 iASL/Disassembler: Added a new option (-da, "disassemble all") to load the
180 namespace from and disassemble an entire group of AML files. Useful for
181 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn) and
182 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
184 iASL: Allow multiple invocations of -e option. This change allows multiple
185 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ 834.
188 ----------------------------------------
189 02 July 2010. Summary of changes for version 20100702:
191 1) ACPI CA Core Subsystem:
193 Implemented several updates to the recently added GPE reference count
194 support. The model for "wake" GPEs is changing to give the host OS complete
195 control of these GPEs. Eventually, the ACPICA core will not execute any _PRW
196 methods, since the host already must execute them. Also, additional changes
197 were made to help ensure that the reference counts are kept in proper
198 synchronization with reality. Rafael J. Wysocki.
200 1) Ensure that GPEs are not enabled twice during initialization.
201 2) Ensure that GPE enable masks stay in sync with the reference count.
202 3) Do not inadvertently enable GPEs when writing GPE registers.
203 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
204 interface. This interface will set or clear individual GPEs for wakeup.
205 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These interfaces
206 are now used for "runtime" GPEs only.
208 Changed the behavior of the GPE install/remove handler interfaces. The GPE is
209 no longer disabled during this process, as it was found to cause problems on
210 some machines. Rafael J. Wysocki.
212 Reverted a change introduced in version 20100528 to enable Embedded
213 Controller multi-byte transfers. This change was found to cause problems with
214 Index Fields and possibly Bank Fields. It will be reintroduced when these
215 problems have been resolved.
217 Fixed a problem with references to Alias objects within Package Objects. A
218 reference to an Alias within the definition of a Package was not always
219 resolved properly. Aliases to objects like Processors, Thermal zones, etc.
220 were resolved to the actual object instead of a reference to the object as it
221 should be. Package objects are only allowed to contain integer, string,
222 buffer, package, and reference objects. Redhat bugzilla 608648.
224 Example Code and Data Size: These are the sizes for the OS-independent
225 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
226 debug version of the code includes the debug output trace mechanism and has a
227 much larger code and data size.
230 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
231 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
233 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
234 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
236 2) iASL Compiler/Disassembler and Tools:
238 iASL: Implemented a new compiler subsystem to allow definition and
239 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc. These
240 are called "ACPI Data Tables", and the new compiler is the "Data Table
241 Compiler". This compiler is intended to simplify the existing error-prone
242 process of creating these tables for the BIOS, as well as allowing the
243 disassembly, modification, recompilation, and override of existing ACPI data
244 tables. See the iASL User Guide for detailed information.
246 iASL: Implemented a new Template Generator option in support of the new Data
247 Table Compiler. This option will create examples of all known ACPI tables
248 that can be used as the basis for table development. See the iASL
249 documentation and the -T option.
251 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
254 Updated the Linux makefiles for iASL and AcpiExec to place the generated
255 object files in the local directory so that there can be no collisions
256 between the shared files between them that are generated with different
259 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec. Use
260 the #define __APPLE__ to enable this support.
262 ----------------------------------------
263 28 May 2010. Summary of changes for version 20100528:
265 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
266 available at www.acpi.info. This is primarily an errata release.
268 1) ACPI CA Core Subsystem:
270 Undefined ACPI tables: We are looking for the definitions for the following
271 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
273 Implemented support to enable multi-byte transfers for Embedded Controller
274 (EC) operation regions. Previously, the maximum data size passed to the EC
275 operation region handler was a single byte. There are often EC Fields larger
276 than one byte that need to be transferred, and it is useful for the EC driver
277 to lock these as a single transaction. This change enables single transfers
278 larger than 8 bits. This effectively changes the access to the EC space from
279 ByteAcc to AnyAcc, and will probably require changes to the host OS Embedded
280 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-bit
281 transfers. Alexey Starikovskiy, Lin Ming
283 Implemented a performance enhancement for namespace search and access. This
284 change enhances the performance of namespace searches and walks by adding a
285 backpointer to the parent in each namespace node. On large namespaces, this
286 change can improve overall ACPI performance by up to 9X. Adding a pointer to
287 each namespace node increases the overall size of the internal namespace by
288 about 5%, since each namespace entry usually consists of both a namespace
289 node and an ACPI operand object. However, this is the first growth of the
290 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
292 Implemented a performance optimization that reduces the number of namespace
293 walks. On control method exit, only walk the namespace if the method is known
294 to have created namespace objects outside of its local scope. Previously, the
295 entire namespace was traversed on each control method exit. This change can
296 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob Moore.
298 Added support to truncate I/O addresses to 16 bits for Windows compatibility.
299 Some ASL code has been seen in the field that inadvertently has bits set
300 above bit 15. This feature is optional and is enabled if the BIOS requests
301 any Windows OSI strings. It can also be enabled by the host OS. Matthew
304 Added support to limit the maximum time for the ASL Sleep() operator. To
305 prevent accidental deep sleeps, limit the maximum time that Sleep() will
306 actually sleep. Configurable, the default maximum is two seconds. ACPICA
309 Added run-time validation support for the _WDG and_WED Microsoft predefined
310 methods. These objects are defined by "Windows Instrumentation", and are not
311 part of the ACPI spec. ACPICA BZ 860.
313 Expanded all statistic counters used during namespace and device
314 initialization from 16 to 32 bits in order to support very large namespaces.
316 Replaced all instances of %d in printf format specifiers with %u since nearly
317 all integers in ACPICA are unsigned.
319 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly returned
322 Example Code and Data Size: These are the sizes for the OS-independent
323 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
324 debug version of the code includes the debug output trace mechanism and has a
325 much larger code and data size.
328 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
329 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
331 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
332 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
334 2) iASL Compiler/Disassembler and Tools:
336 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
337 methods. These objects are defined by "Windows Instrumentation", and are not
338 part of the ACPI spec. ACPICA BZ 860.
340 AcpiExec: added option to disable the memory tracking mechanism. The -dt
341 option will disable the tracking mechanism, which improves performance
344 AcpiExec: Restructured the command line options into -d (disable) and -e
347 ----------------------------------------
348 28 April 2010. Summary of changes for version 20100428:
350 1) ACPI CA Core Subsystem:
352 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
353 including FADT-based and GPE Block Devices, execute any _PRW methods in the
354 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
355 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
356 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
357 Devices. Provides compatibility with other ACPI implementations. Two new
358 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob Moore.
360 Fixed a regression introduced in version 20100331 within the table manager
361 where initial table loading could fail. This was introduced in the fix for
362 AcpiReallocateRootTable. Also, renamed some of fields in the table manager
363 data structures to clarify their meaning and use.
365 Fixed a possible allocation overrun during internal object copy in
366 AcpiUtCopySimpleObject. The original code did not correctly handle the case
367 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ 847.
369 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
370 possible access beyond end-of-allocation. Also, now fully validate descriptor
371 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
373 Example Code and Data Size: These are the sizes for the OS-independent
374 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
375 debug version of the code includes the debug output trace mechanism and has a
376 much larger code and data size.
379 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
380 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
382 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
383 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
385 2) iASL Compiler/Disassembler and Tools:
387 iASL: Implemented Min/Max/Len/Gran validation for address resource
388 descriptors. This change implements validation for the address fields that
389 are common to all address-type resource descriptors. These checks are
390 implemented: Checks for valid Min/Max, length within the Min/Max window,
391 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as per
392 table 6-40 in the ACPI 4.0a specification. Also split the large aslrestype1.c
393 and aslrestype2.c files into five new files. ACPICA BZ 840.
395 iASL: Added support for the _Wxx predefined names. This support was missing
396 and these names were not recognized by the compiler as valid predefined
397 names. ACPICA BZ 851.
399 iASL: Added an error for all predefined names that are defined to return no
400 value and thus must be implemented as Control Methods. These include all of
401 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
402 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
404 iASL: Implemented the -ts option to emit hex AML data in ASL format, as an
405 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to be
406 dynamically loaded via the Load() operator. Also cleaned up output for the -
407 ta and -tc options. ACPICA BZ 853.
409 Tests: Added a new file with examples of extended iASL error checking.
410 Demonstrates the advanced error checking ability of the iASL compiler.
411 Available at tests/misc/badcode.asl.
413 ----------------------------------------
414 31 March 2010. Summary of changes for version 20100331:
416 1) ACPI CA Core Subsystem:
418 Completed a major update for the GPE support in order to improve support for
419 shared GPEs and to simplify both host OS and ACPICA code. Added a reference
420 count mechanism to support shared GPEs that require multiple device drivers.
421 Several external interfaces have changed. One external interface has been
422 removed. One new external interface was added. Most of the GPE external
423 interfaces now use the GPE spinlock instead of the events mutex (and the
424 Flags parameter for many GPE interfaces has been removed.) See the updated
425 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, Rafael
426 Wysocki. ACPICA BZ 831.
429 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
435 Implemented write support for DataTable operation regions. These regions are
436 defined via the DataTableRegion() operator. Previously, only read support was
437 implemented. The ACPI specification allows DataTableRegions to be read/write,
440 Implemented a new subsystem option to force a copy of the DSDT to local
441 memory. Optionally copy the entire DSDT to local memory (instead of simply
442 mapping it.) There are some (albeit very rare) BIOSs that corrupt or replace
443 the original DSDT, creating the need for this option. Default is FALSE, do
446 Implemented detection of a corrupted or replaced DSDT. This change adds
447 support to detect a DSDT that has been corrupted and/or replaced from outside
448 the OS (by firmware). This is typically catastrophic for the system, but has
449 been seen on some machines. Once this problem has been detected, the DSDT
450 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
452 Fixed two problems with AcpiReallocateRootTable during the root table copy.
453 When copying the root table to the new allocation, the length used was
454 incorrect. The new size was used instead of the current table size, meaning
455 too much data was copied. Also, the count of available slots for ACPI tables
456 was not set correctly. Alexey Starikovskiy, Bob Moore.
458 Example Code and Data Size: These are the sizes for the OS-independent
459 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
460 debug version of the code includes the debug output trace mechanism and has a
461 much larger code and data size.
464 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
465 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
467 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
468 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
470 2) iASL Compiler/Disassembler and Tools:
472 iASL: Implement limited typechecking for values returned from predefined
473 control methods. The type of any returned static (unnamed) object is now
474 validated. For example, Return(1). ACPICA BZ 786.
476 iASL: Fixed a predefined name object verification regression. Fixes a problem
477 introduced in version 20100304. An error is incorrectly generated if a
478 predefined name is declared as a static named object with a value defined
479 using the keywords "Zero", "One", or "Ones". Lin Ming.
481 iASL: Added Windows 7 support for the -g option (get local ACPI tables) by
482 reducing the requested registry access rights. ACPICA BZ 842.
484 Disassembler: fixed a possible fault when generating External() statements.
485 Introduced in commit ae7d6fd: Properly handle externals with parent-prefix
486 (carat). Fixes a string length allocation calculation. Lin Ming.
488 ----------------------------------------
489 04 March 2010. Summary of changes for version 20100304:
491 1) ACPI CA Core Subsystem:
493 Fixed a possible problem with the AML Mutex handling function
494 AcpiExReleaseMutex where the function could fault under the very rare
495 condition when the interpreter has blocked, the interpreter lock is released,
496 the interpreter is then reentered via the same thread, and attempts to
497 acquire an AML mutex that was previously acquired. FreeBSD report 140979. Lin
500 Implemented additional configuration support for the AML "Debug Object".
501 Output from the debug object can now be enabled via a global variable,
502 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine debugging.
503 This debug output is now available in the release version of ACPICA instead
504 of just the debug version. Also, the entire debug output module can now be
505 configured out of the ACPICA build if desired. One new file added,
506 executer/exdebug.c. Lin Ming, Bob Moore.
508 Added header support for the ACPI MCHI table (Management Controller Host
509 Interface Table). This table was added in ACPI 4.0, but the defining document
510 has only recently become available.
512 Standardized output of integer values for ACPICA warnings/errors. Always use
513 0x prefix for hex output, always use %u for unsigned integer decimal output.
514 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400
515 invocations.) These invocations were converted from the original
516 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
518 Example Code and Data Size: These are the sizes for the OS-independent
519 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
520 debug version of the code includes the debug output trace mechanism and has a
521 much larger code and data size.
524 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
525 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
527 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
528 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
530 2) iASL Compiler/Disassembler and Tools:
532 iASL: Implemented typechecking support for static (non-control method)
533 predefined named objects that are declared with the Name() operator. For
534 example, the type of this object is now validated to be of type Integer:
535 Name(_BBN, 1). This change migrates the compiler to using the core predefined
536 name table instead of maintaining a local version. Added a new file,
537 aslpredef.c. ACPICA BZ 832.
539 Disassembler: Added support for the ACPI 4.0 MCHI table.
541 ----------------------------------------
542 21 January 2010. Summary of changes for version 20100121:
544 1) ACPI CA Core Subsystem:
546 Added the 2010 copyright to all module headers and signons. This affects
547 virtually every file in the ACPICA core subsystem, the iASL compiler, the
548 tools/utilities, and the test suites.
550 Implemented a change to the AcpiGetDevices interface to eliminate unnecessary
551 invocations of the _STA method. In the case where a specific _HID is
552 requested, do not run _STA until a _HID match is found. This eliminates
553 potentially dozens of _STA calls during a search for a particular device/HID,
554 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
556 Implemented an additional repair for predefined method return values. Attempt
557 to repair unexpected NULL elements within returned Package objects. Create an
558 Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.
559 ACPICA BZ 818. Lin Ming, Bob Moore.
561 Removed the obsolete ACPI_INTEGER data type. This type was introduced as the
562 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with
563 64-bit AML integers). It is now obsolete and this change removes it from the
564 ACPICA code base, replaced by UINT64. The original typedef has been retained
565 for now for compatibility with existing device driver code. ACPICA BZ 824.
567 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in
568 the parse tree object.
570 Added additional warning options for the gcc-4 generation. Updated the source
571 accordingly. This includes some code restructuring to eliminate unreachable
572 code, elimination of some gotos, elimination of unused return values, some
573 additional casting, and removal of redundant declarations.
575 Example Code and Data Size: These are the sizes for the OS-independent
576 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
577 debug version of the code includes the debug output trace mechanism and has a
578 much larger code and data size.
581 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
582 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
584 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
585 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
587 2) iASL Compiler/Disassembler and Tools:
589 No functional changes for this release.
591 ----------------------------------------
592 14 December 2009. Summary of changes for version 20091214:
594 1) ACPI CA Core Subsystem:
596 Enhanced automatic data type conversions for predefined name repairs. This
597 change expands the automatic repairs/conversions for predefined name return
598 values to make Integers, Strings, and Buffers fully interchangeable. Also, a
599 Buffer can be converted to a Package of Integers if necessary. The nsrepair.c
600 module was completely restructured. Lin Ming, Bob Moore.
602 Implemented automatic removal of null package elements during predefined name
603 repairs. This change will automatically remove embedded and trailing NULL
604 package elements from returned package objects that are defined to contain a
605 variable number of sub-packages. The driver is then presented with a package
606 with no null elements to deal with. ACPICA BZ 819.
608 Implemented a repair for the predefined _FDE and _GTM names. The expected
609 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
610 possible problems (both seen in the field), where a package of integers is
611 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.
613 Implemented additional module-level code support. This change will properly
614 execute module-level code that is not at the root of the namespace (under a
615 Device object, etc.). Now executes the code within the current scope instead
616 of the root. ACPICA BZ 762. Lin Ming.
618 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
619 problem where mutex errors can occur when running a _REG method that is in
620 the same scope as a method-defined operation region or an operation region
621 under a module-level IF block. This type of code is rare, so the problem has
622 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
624 Fixed a possible memory leak during module-level code execution. An object
625 could be leaked for each block of executed module-level code if the
626 interpreter slack mode is enabled This change deletes any implicitly returned
627 object from the module-level code block. Lin Ming.
629 Removed messages for successful predefined repair(s). The repair mechanism
630 was considered too wordy. Now, messages are only unconditionally emitted if
631 the return object cannot be repaired. Existing messages for successful
632 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.
634 Example Code and Data Size: These are the sizes for the OS-independent
635 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
636 debug version of the code includes the debug output trace mechanism and has a
637 much larger code and data size.
640 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
641 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
643 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
644 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
646 2) iASL Compiler/Disassembler and Tools:
648 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files
649 were no longer automatically removed at the termination of the compile.
651 acpiexec: Implemented the -f option to specify default region fill value.
652 This option specifies the value used to initialize buffers that simulate
653 operation regions. Default value is zero. Useful for debugging problems that
654 depend on a specific initial value for a region or field.
656 ----------------------------------------
657 12 November 2009. Summary of changes for version 20091112:
659 1) ACPI CA Core Subsystem:
661 Implemented a post-order callback to AcpiWalkNamespace. The existing
662 interface only has a pre-order callback. This change adds an additional
663 parameter for a post-order callback which will be more useful for bus scans.
664 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
666 Modified the behavior of the operation region memory mapping cache for
667 SystemMemory. Ensure that the memory mappings created for operation regions
668 do not cross 4K page boundaries. Crossing a page boundary while mapping
669 regions can cause kernel warnings on some hosts if the pages have different
670 attributes. Such regions are probably BIOS bugs, and this is the workaround.
671 Linux BZ 14445. Lin Ming.
673 Implemented an automatic repair for predefined methods that must return
674 sorted lists. This change will repair (by sorting) packages returned by _ALR,
675 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
676 and do not contain NULL package elements. Adds one new file,
677 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
679 Fixed a possible fault during predefined name validation if a return Package
680 object contains NULL elements. Also adds a warning if a NULL element is
681 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
682 include repair or removal of all such NULL elements where possible.
684 Implemented additional module-level executable AML code support. This change
685 will execute module-level code that is not at the root of the namespace
686 (under a Device object, etc.) at table load time. Module-level executable AML
687 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
689 Implemented a new internal function to create Integer objects. This function
690 simplifies miscellaneous object creation code. ACPICA BZ 823.
692 Reduced the severity of predefined repair messages, Warning to Info. Since
693 the object was successfully repaired, a warning is too severe. Reduced to an
694 info message for now. These messages may eventually be changed to debug-only.
697 Example Code and Data Size: These are the sizes for the OS-independent
698 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
699 debug version of the code includes the debug output trace mechanism and has a
700 much larger code and data size.
703 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
704 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
706 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
707 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
709 2) iASL Compiler/Disassembler and Tools:
711 iASL: Implemented Switch() with While(1) so that Break works correctly. This
712 change correctly implements the Switch operator with a surrounding While(1)
713 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
715 iASL: Added a message if a package initializer list is shorter than package
716 length. Adds a new remark for a Package() declaration if an initializer list
717 exists, but is shorter than the declared length of the package. Although
718 technically legal, this is probably a coding error and it is seen in the
719 field. ACPICA BZ 815. Lin Ming, Bob Moore.
721 iASL: Fixed a problem where the compiler could fault after the maximum number
722 of errors was reached (200).
724 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
727 ----------------------------------------
728 13 October 2009. Summary of changes for version 20091013:
730 1) ACPI CA Core Subsystem:
732 Fixed a problem where an Operation Region _REG method could be executed more
733 than once. If a custom address space handler is installed by the host before
734 the "initialize operation regions" phase of the ACPICA initialization, any
735 _REG methods for that address space could be executed twice. This change
736 fixes the problem. ACPICA BZ 427. Lin Ming.
738 Fixed a possible memory leak for the Scope() ASL operator. When the exact
739 invocation of "Scope(\)" is executed (change scope to root), one internal
740 operand object was leaked. Lin Ming.
742 Implemented a run-time repair for the _MAT predefined method. If the _MAT
743 return value is defined as a Field object in the AML, and the field
744 size is less than or equal to the default width of an integer (32 or 64),_MAT
745 can incorrectly return an Integer instead of a Buffer. ACPICA now
746 automatically repairs this problem. ACPICA BZ 810.
748 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
749 "OEM Information" field is often incorrectly returned as an Integer with
750 value zero if the field is not supported by the platform. This is due to an
751 ambiguity in the ACPI specification. The field should always be a string.
752 ACPICA now automatically repairs this problem by returning a NULL string
753 within the returned Package. ACPICA BZ 807.
755 Example Code and Data Size: These are the sizes for the OS-independent
756 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
757 debug version of the code includes the debug output trace mechanism and has a
758 much larger code and data size.
761 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
762 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
764 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
765 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
767 2) iASL Compiler/Disassembler and Tools:
769 Disassembler: Fixed a problem where references to external symbols that
770 contained one or more parent-prefixes (carats) were not handled correctly,
771 possibly causing a fault. ACPICA BZ 806. Lin Ming.
773 Disassembler: Restructured the code so that all functions that handle
774 external symbols are in a single module. One new file is added,
777 AML Debugger: Added a max count argument for the Batch command (which
778 executes multiple predefined methods within the namespace.)
780 iASL: Updated the compiler documentation (User Reference.) Available at
781 http://www.acpica.org/documentation/. ACPICA BZ 750.
783 AcpiXtract: Updated for Lint and other formatting changes. Close all open
786 ----------------------------------------
787 03 September 2009. Summary of changes for version 20090903:
789 1) ACPI CA Core Subsystem:
791 For Windows Vista compatibility, added the automatic execution of an _INI
792 method located at the namespace root (\_INI). This method is executed at
793 table load time. This support is in addition to the automatic execution of
796 Fixed a possible memory leak in the interpreter for AML package objects if
797 the package initializer list is longer than the defined size of the package.
798 This apparently can only happen if the BIOS changes the package size on the
799 fly (seen in a _PSS object), as ASL compilers do not allow this. The
800 interpreter will truncate the package to the defined size (and issue an error
801 message), but previously could leave the extra objects undeleted if they were
802 pre-created during the argument processing (such is the case if the package
803 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
805 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
806 This has been reported in the field. Previously, ACPICA would zero out the
807 buffer/string. Now, the operation is treated as a noop. Provides Windows
808 compatibility. ACPICA BZ 803. Lin Ming.
810 Removed an extraneous error message for ASL constructs of the form
811 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
812 are seen in many BIOSs and are once again treated as NOOPs and no error is
813 emitted when they are encountered. ACPICA BZ 785.
815 Fixed an extraneous warning message if a _DSM reserved method returns a
816 Package object. _DSM can return any type of object, so validation on the
817 return type cannot be performed. ACPICA BZ 802.
819 Example Code and Data Size: These are the sizes for the OS-independent
820 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
821 debug version of the code includes the debug output trace mechanism and has a
822 much larger code and data size.
825 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
826 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
828 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
829 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
831 2) iASL Compiler/Disassembler and Tools:
833 iASL: Fixed a problem with the use of the Alias operator and Resource
834 Templates. The correct alias is now constructed and no error is emitted.
837 iASL: Implemented the -I option to specify additional search directories for
838 include files. Allows multiple additional search paths for include files.
839 Directories are searched in the order specified on the command line (after
840 the local directory is searched.) ACPICA BZ 800.
842 iASL: Fixed a problem where the full pathname for include files was not
843 emitted for warnings/errors. This caused the IDE support to not work
844 properly. ACPICA BZ 765.
846 iASL: Implemented the -@ option to specify a Windows-style response file
847 containing additional command line options. ACPICA BZ 801.
849 AcpiExec: Added support to load multiple AML files simultaneously (such as a
850 DSDT and multiple SSDTs). Also added support for wildcards within the AML
851 pathname. These features allow all machine tables to be easily loaded and
852 debugged together. ACPICA BZ 804.
854 Disassembler: Added missing support for disassembly of HEST table Error Bank
857 ----------------------------------------
858 30 July 2009. Summary of changes for version 20090730:
860 The ACPI 4.0 implementation for ACPICA is complete with this release.
862 1) ACPI CA Core Subsystem:
864 ACPI 4.0: Added header file support for all new and changed ACPI tables.
865 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
866 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
867 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
868 have been some ACPI 4.0 changes to other existing tables. Split the large
869 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
871 ACPI 4.0: Implemented predefined name validation for all new names. There are
872 31 new names in ACPI 4.0. The predefined validation module was split into two
873 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
875 Implemented support for so-called "module-level executable code". This is
876 executable AML code that exists outside of any control method and is intended
877 to be executed at table load time. Although illegal since ACPI 2.0, this type
878 of code still exists and is apparently still being created. Blocks of this
879 code are now detected and executed as intended. Currently, the code blocks
880 must exist under either an If, Else, or While construct; these are the
881 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
883 Implemented an automatic dynamic repair for predefined names that return
884 nested Package objects. This applies to predefined names that are defined to
885 return a variable-length Package of sub-packages. If the number of sub-
886 packages is one, BIOS code is occasionally seen that creates a simple single
887 package with no sub-packages. This code attempts to fix the problem by
888 wrapping a new package object around the existing package. These methods can
889 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
892 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
893 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
896 Fixed a problem with AcpiReset where the reset would silently fail if the
897 register was one of the protected I/O ports. AcpiReset now bypasses the port
898 validation mechanism. This may eventually be driven into the AcpiRead/Write
901 Fixed a regression related to the recent update of the AcpiRead/Write
902 interfaces. A sleep/suspend could fail if the optional PM2 Control register
903 does not exist during an attempt to write the Bus Master Arbitration bit.
904 (However, some hosts already delete the code that writes this bit, and the
905 code may in fact be obsolete at this date.) ACPICA BZ 799.
907 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
908 in succession. ACPICA BZ 795.
910 Example Code and Data Size: These are the sizes for the OS-independent
911 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
912 debug version of the code includes the debug output trace mechanism and has a
913 much larger code and data size.
916 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
917 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
919 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
920 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
922 2) iASL Compiler/Disassembler and Tools:
924 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
925 changes to existing tables. ACPICA BZ 775.
927 ----------------------------------------
928 25 June 2009. Summary of changes for version 20090625:
930 The ACPI 4.0 Specification was released on June 16 and is available at
931 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
932 continue for the next few releases.
934 1) ACPI CA Core Subsystem:
936 ACPI 4.0: Implemented interpreter support for the IPMI operation region
937 address space. Includes support for bi-directional data buffers and an IPMI
938 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
941 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
942 support in both the header files and the disassembler.
944 Completed a major update for the AcpiGetObjectInfo external interface.
946 - Support for variable, unlimited length HID, UID, and CID strings.
947 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
948 - Call the _SxW power methods on behalf of a device object.
949 - Determine if a device is a PCI root bridge.
950 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
951 These changes will require an update to all callers of this interface. See
952 the updated ACPICA Programmer Reference for details. One new source file has
953 been added - utilities/utids.c. ACPICA BZ 368, 780.
955 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
956 transfers. The Value parameter has been extended from 32 bits to 64 bits in
957 order to support new ACPI 4.0 tables. These changes will require an update to
958 all callers of these interfaces. See the ACPICA Programmer Reference for
959 details. ACPICA BZ 768.
961 Fixed several problems with AcpiAttachData. The handler was not invoked when
962 the host node was deleted. The data sub-object was not automatically deleted
963 when the host node was deleted. The interface to the handler had an unused
964 parameter, this was removed. ACPICA BZ 778.
966 Enhanced the function that dumps ACPI table headers. All non-printable
967 characters in the string fields are now replaced with '?' (Signature, OemId,
968 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
969 these fields are occasionally seen in the field. ACPICA BZ 788.
971 Fixed a problem with predefined method repair code where the code that
972 attempts to repair/convert an object of incorrect type is only executed on
973 the first time the predefined method is called. The mechanism that disables
974 warnings on subsequent calls was interfering with the repair mechanism.
977 Fixed a possible memory leak in the predefined validation/repair code when a
978 buffer is automatically converted to an expected string object.
980 Removed obsolete 16-bit files from the distribution and from the current git
981 tree head. ACPICA BZ 776.
983 Example Code and Data Size: These are the sizes for the OS-independent
984 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
985 debug version of the code includes the debug output trace mechanism and has a
986 much larger code and data size.
989 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
990 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
992 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
993 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
995 2) iASL Compiler/Disassembler and Tools:
997 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
998 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
1000 ACPI 4.0: iASL - implemented compile-time validation support for all new
1001 predefined names and control methods (31 total). ACPICA BZ 769.
1003 ----------------------------------------
1004 21 May 2009. Summary of changes for version 20090521:
1006 1) ACPI CA Core Subsystem:
1008 Disabled the preservation of the SCI enable bit in the PM1 control register.
1009 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
1010 a "preserved" bit - "OSPM always preserves this bit position", section
1011 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
1012 because the bit needs to be explicitly set by the OS as a workaround. No
1013 machines fail if the bit is not preserved. Therefore, ACPICA no longer
1014 attempts to preserve this bit.
1016 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
1017 incorrectly formed _PRT package could cause a fault. Added validation to
1018 ensure that each package element is actually a sub-package.
1020 Implemented a new interface to install or override a single control method,
1021 AcpiInstallMethod. This interface is useful when debugging in order to repair
1022 an existing method or to install a missing method without having to override
1023 the entire ACPI table. See the ACPICA Programmer Reference for use and
1024 examples. Lin Ming, Bob Moore.
1026 Fixed several reference count issues with the DdbHandle object that is
1027 created from a Load or LoadTable operator. Prevent premature deletion of the
1028 object. Also, mark the object as invalid once the table has been unloaded.
1029 This is needed because the handle itself may not be deleted after the table
1030 unload, depending on whether it has been stored in a named object by the
1033 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
1034 mutexes of the same sync level are acquired but then not released in strict
1035 opposite order, the internally maintained Current Sync Level becomes confused
1036 and can cause subsequent execution errors. ACPICA BZ 471.
1038 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
1039 specification has been changed to make the SyncLevel for mutex objects more
1040 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
1041 same as the current sync level. This makes more sense than the previous rule
1042 (SyncLevel less than or equal). This change updates the code to match the
1045 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
1046 (local) cache must be locked during all cache object deletions. Andrew
1049 Updated the Load operator to use operation region interfaces. This replaces
1050 direct memory mapping with region access calls. Now, all region accesses go
1051 through the installed region handler as they should.
1053 Simplified and optimized the NsGetNextNode function. Reduced parameter count
1054 and reduced code for this frequently used function.
1056 Example Code and Data Size: These are the sizes for the OS-independent
1057 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1058 debug version of the code includes the debug output trace mechanism and has a
1059 much larger code and data size.
1062 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
1063 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
1065 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
1066 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
1068 2) iASL Compiler/Disassembler and Tools:
1070 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
1071 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
1072 after an invalid sub-table ID.
1074 ----------------------------------------
1075 22 April 2009. Summary of changes for version 20090422:
1077 1) ACPI CA Core Subsystem:
1079 Fixed a compatibility issue with the recently released I/O port protection
1080 mechanism. For windows compatibility, 1) On a port protection violation,
1081 simply ignore the request and do not return an exception (allow the control
1082 method to continue execution.) 2) If only part of the request overlaps a
1083 protected port, read/write the individual ports that are not protected. Linux
1086 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
1087 breaks into the AML debugger if the debugger is present. This matches the
1088 ACPI-defined behavior.
1090 Fixed several possible warnings related to the use of the configurable
1091 ACPI_THREAD_ID. This type can now be configured as either an integer or a
1092 pointer with no warnings. Also fixes several warnings in printf-like
1093 statements for the 64-bit build when the type is configured as a pointer.
1096 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
1097 warning options.) Examples include printf formats, aliasing, unused globals,
1098 missing prototypes, missing switch default statements, use of non-ANSI
1099 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
1100 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
1102 Example Code and Data Size: These are the sizes for the OS-independent
1103 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1104 debug version of the code includes the debug output trace mechanism and has a
1105 much larger code and data size.
1108 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
1109 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
1111 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
1112 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
1114 2) iASL Compiler/Disassembler and Tools:
1116 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
1119 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
1120 correctly digest Windows/DOS formatted files (with CR/LF).
1122 iASL: Added a new option for "quiet mode" (-va) that produces only the
1123 compilation summary, not individual errors and warnings. Useful for large
1126 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
1127 timeout that can be used to detect hang conditions during execution of AML
1128 code (includes both internal semaphores and AML-defined mutexes and events.)
1130 Added new makefiles for the generation of acpica in a generic unix-like
1131 environment. These makefiles are intended to generate the acpica tools and
1132 utilities from the original acpica git source tree structure.
1134 Test Suites: Updated and cleaned up the documentation files. Updated the
1135 copyrights to 2009, affecting all source files. Use the new version of iASL
1136 with quiet mode. Increased the number of available semaphores in the Windows
1137 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
1138 an alternate implementation of the semaphore timeout to allow aslts to
1139 execute fully on Cygwin.
1141 ----------------------------------------
1142 20 March 2009. Summary of changes for version 20090320:
1144 1) ACPI CA Core Subsystem:
1146 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
1147 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
1148 namespace walks (readers), but block a dynamic table unload until it can gain
1149 exclusive write access to the namespace. This fixes a problem where a table
1150 unload could (possibly catastrophically) delete the portion of the namespace
1151 that is currently being examined by a walk. Adds a new file, utlock.c, that
1152 implements the reader/writer lock mechanism. ACPICA BZ 749.
1154 Fixed a regression introduced in version 20090220 where a change to the FADT
1155 handling could cause the ACPICA subsystem to access non-existent I/O ports.
1157 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
1158 FADT can contain both 32-bit and 64-bit versions of these addresses.
1159 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
1160 versions were valid, but not equal, the 64-bit version was used. This was
1161 found to cause some machines to fail. Now, in this case, the 32-bit version
1162 is used instead. This now matches the Windows behavior.
1164 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
1165 compatibility and protects the standard PC I/O ports from access via AML
1166 code. Adds a new file, hwvalid.c
1168 Fixed a possible extraneous warning message from the FADT support. The
1169 message warns of a 32/64 length mismatch between the legacy and GAS
1170 definitions for a register.
1172 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
1173 made obsolete by the port protection mechanism above. It was previously used
1174 to validate the entire address range of an operation region, which could be
1175 incorrect if the range included illegal ports, but fields within the
1176 operation region did not actually access those ports. Validation is now
1177 performed on a per-field basis instead of the entire region.
1179 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
1180 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
1181 means a read/modify/write when writing to the register. However, for status
1182 registers, writing a one means clear the event. Writing a zero means preserve
1183 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
1184 and the ACPICA code now simply always writes a zero to the ignored bit.
1186 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
1187 per the ACPI specification, for the control registers, preserve
1188 (read/modify/write) all bits that are defined as either reserved or ignored.
1190 Updated the handling of write-only bits in the PM1 A/B Control Registers.
1191 When reading the register, zero the write-only bits as per the ACPI spec.
1192 ACPICA BZ 443. Lin Ming.
1194 Removed "Linux" from the list of supported _OSI strings. Linux no longer
1195 wants to reply true to this request. The Windows strings are the only paths
1196 through the AML that are tested and known to work properly.
1199 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
1200 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
1202 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
1203 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
1205 2) iASL Compiler/Disassembler and Tools:
1207 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
1210 ----------------------------------------
1211 20 February 2009. Summary of changes for version 20090220:
1213 1) ACPI CA Core Subsystem:
1215 Optimized the ACPI register locking. Removed locking for reads from the ACPI
1216 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
1217 not required when reading the single-bit registers. The
1218 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
1219 This will improve performance for reads on these registers. ACPICA BZ 760.
1221 Fixed the parameter validation for AcpiRead/Write. Now return
1222 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
1223 the register has an address of zero. Previously, these cases simply returned
1224 AE_OK. For optional registers such as PM1B status/enable/control, the caller
1225 should check for a valid register address before calling. ACPICA BZ 748.
1227 Renamed the external ACPI bit register access functions. Renamed
1228 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
1229 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
1230 Also, restructured the code for these functions by simplifying the code path
1231 and condensing duplicate code to reduce code size.
1233 Added new functions to transparently handle the possibly split PM1 A/B
1234 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
1235 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
1238 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
1239 This function writes both of the PM1 control registers (A/B). These registers
1240 are different than the PM1 A/B status and enable registers in that different
1241 values can be written to the A/B registers. Most notably, the SLP_TYP bits
1242 can be different, as per the values returned from the _Sx predefined methods.
1244 Removed an extra register write within AcpiHwClearAcpiStatus. This function
1245 was writing an optional PM1B status register twice. The existing call to the
1246 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
1247 register. ACPICA BZ 751.
1249 Split out the PM1 Status registers from the FADT. Added new globals for these
1250 registers (A/B), similar to the way the PM1 Enable registers are handled.
1251 Instead of overloading the FADT Event Register blocks. This makes the code
1252 clearer and less prone to error.
1254 Fixed the warning message for when the platform contains too many ACPI tables
1255 for the default size of the global root table data structure. The calculation
1256 for the truncation value was incorrect.
1258 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
1259 obsolete macro, since it is now a simple reference to ->common.type. There
1260 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
1262 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
1263 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
1264 simply SLEEP_TYPE. ACPICA BZ 754.
1266 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
1267 function is only needed on 64-bit host operating systems and is thus not
1268 included for 32-bit hosts.
1270 Debug output: print the input and result for invocations of the _OSI reserved
1271 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
1272 verbosity of this debug level. Len Brown.
1274 Example Code and Data Size: These are the sizes for the OS-independent
1275 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1276 debug version of the code includes the debug output trace mechanism and has a
1277 much larger code and data size.
1280 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
1281 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
1283 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
1284 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
1286 2) iASL Compiler/Disassembler and Tools:
1288 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
1289 various legal performance profiles.
1291 ----------------------------------------
1292 23 January 2009. Summary of changes for version 20090123:
1294 1) ACPI CA Core Subsystem:
1296 Added the 2009 copyright to all module headers and signons. This affects
1297 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1298 the tools/utilities.
1300 Implemented a change to allow the host to override any ACPI table, including
1301 dynamically loaded tables. Previously, only the DSDT could be replaced by the
1302 host. With this change, the AcpiOsTableOverride interface is called for each
1303 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
1304 a table is dynamically loaded via the AML Load operator.
1306 Updated FADT flag definitions, especially the Boot Architecture flags.
1308 Debugger: For the Find command, automatically pad the input ACPI name with
1309 underscores if the name is shorter than 4 characters. This enables a match
1310 with the actual namespace entry which is itself padded with underscores.
1312 Example Code and Data Size: These are the sizes for the OS-independent
1313 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1314 debug version of the code includes the debug output trace mechanism and has a
1315 much larger code and data size.
1318 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
1319 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
1321 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
1322 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
1324 2) iASL Compiler/Disassembler and Tools:
1326 Fix build error under Bison-2.4.
1328 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
1329 flags. Now decode all flags, regardless of the FADT version. Flag output
1330 includes the FADT version which first defined each flag.
1332 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
1333 DSDT). Windows only.
1335 ----------------------------------------
1336 04 December 2008. Summary of changes for version 20081204:
1338 1) ACPI CA Core Subsystem:
1340 The ACPICA Programmer Reference has been completely updated and revamped for
1341 this release. This includes updates to the external interfaces, OSL
1342 interfaces, the overview sections, and the debugger reference.
1344 Several new ACPICA interfaces have been implemented and documented in the
1345 programmer reference:
1346 AcpiReset - Writes the reset value to the FADT-defined reset register.
1347 AcpiDisableAllGpes - Disable all available GPEs.
1348 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
1349 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
1350 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
1351 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
1352 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
1354 Most of the public ACPI hardware-related interfaces have been moved to a new
1355 file, components/hardware/hwxface.c
1357 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
1358 register lengths within the FADT are now used, and the low level ACPI
1359 register access no longer hardcodes the ACPI register lengths. Given that
1360 there may be some risk in actually trusting the FADT register lengths, a run-
1361 time option was added to fall back to the default hardcoded lengths if the
1362 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
1363 option is set to true for now, and a warning is issued if a suspicious FADT
1364 register length is overridden with the default value.
1366 Fixed a reference count issue in NsRepairObject. This problem was introduced
1367 in version 20081031 as part of a fix to repair Buffer objects within
1370 Added semaphore support to the Linux/Unix application OS-services layer
1371 (OSL). ACPICA BZ 448. Lin Ming.
1373 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
1374 be implemented in the OSL, or will binary semaphores be used instead.
1376 Example Code and Data Size: These are the sizes for the OS-independent
1377 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1378 debug version of the code includes the debug output trace mechanism and has a
1379 much larger code and data size.
1382 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
1383 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
1385 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
1386 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
1388 2) iASL Compiler/Disassembler and Tools:
1390 iASL: Completed the '-e' option to include additional ACPI tables in order to
1391 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
1394 iASL: Removed the "named object in while loop" error. The compiler cannot
1395 determine how many times a loop will execute. ACPICA BZ 730.
1397 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
1400 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
1402 ----------------------------------------
1403 31 October 2008. Summary of changes for version 20081031:
1405 1) ACPI CA Core Subsystem:
1407 Restructured the ACPICA header files into public/private. acpi.h now includes
1408 only the "public" acpica headers. All other acpica headers are "private" and
1409 should not be included by acpica users. One new file, accommon.h is used to
1410 include the commonly used private headers for acpica code generation. Future
1411 plans include moving all private headers to a new subdirectory.
1413 Implemented an automatic Buffer->String return value conversion for
1414 predefined ACPI methods. For these methods (such as _BIF), added automatic
1415 conversion for return objects that are required to be a String, but a Buffer
1416 was found instead. This can happen when reading string battery data from an
1417 operation region, because it used to be difficult to convert the data from
1418 buffer to string from within the ASL. Ensures that the host OS is provided
1419 with a valid null-terminated string. Linux BZ 11822.
1421 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
1422 into two: one for the 32-bit vector, another for the 64-bit vector. This is
1423 required because the host OS must setup the wake much differently for each
1424 vector (real vs. protected mode, etc.) and the interface itself should not be
1425 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
1426 interface, as it served no purpose (only the firmware reads the vector, OS
1427 only writes the vector.) ACPICA BZ 731.
1429 Implemented a mechanism to escape infinite AML While() loops. Added a loop
1430 counter to force exit from AML While loops if the count becomes too large.
1431 This can occur in poorly written AML when the hardware does not respond
1432 within a while loop and the loop does not implement a timeout. The maximum
1433 loop count is configurable. A new exception code is returned when a loop is
1434 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
1436 Optimized the execution of AML While loops. Previously, a control state
1437 object was allocated and freed for each execution of the loop. The
1438 optimization is to simply reuse the control state for each iteration. This
1439 speeds up the raw loop execution time by about 5%.
1441 Enhanced the implicit return mechanism. For Windows compatibility, return an
1442 implicit integer of value zero for methods that contain no executable code.
1443 Such methods are seen in the field as stubs (presumably), and can cause
1444 drivers to fail if they expect a return value. Lin Ming.
1446 Allow multiple backslashes as root prefixes in namepaths. In a fully
1447 qualified namepath, allow multiple backslash prefixes. This can happen (and
1448 is seen in the field) because of the use of a double-backslash in strings
1449 (since backslash is the escape character) causing confusion. ACPICA BZ 739
1452 Emit a warning if two different FACS or DSDT tables are discovered in the
1453 FADT. Checks if there are two valid but different addresses for the FACS and
1454 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
1456 Consolidated the method argument count validation code. Merged the code that
1457 validates control method argument counts into the predefined validation
1458 module. Eliminates possible multiple warnings for incorrect argument counts.
1460 Implemented ACPICA example code. Includes code for ACPICA initialization,
1461 handler installation, and calling a control method. Available at
1462 source/tools/examples.
1464 Added a global pointer for FACS table to simplify internal FACS access. Use
1465 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
1466 This simplifies the code for the Global Lock and the Firmware Waking
1469 Example Code and Data Size: These are the sizes for the OS-independent
1470 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1471 debug version of the code includes the debug output trace mechanism and has a
1472 much larger code and data size.
1475 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
1476 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
1478 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
1479 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
1481 2) iASL Compiler/Disassembler and Tools:
1483 iASL: Improved disassembly of external method calls. Added the -e option to
1484 allow the inclusion of additional ACPI tables to help with the disassembly of
1485 method invocations and the generation of external declarations during the
1486 disassembly. Certain external method invocations cannot be disassembled
1487 properly without the actual declaration of the method. Use the -e option to
1488 include the table where the external method(s) are actually declared. Most
1489 useful for disassembling SSDTs that make method calls back to the master
1490 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
1491 -e dsdt.aml ssdt1.aml
1493 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
1494 problem where the use of an alias within a namepath would result in a not
1495 found error or cause the compiler to fault. Also now allows forward
1496 references from the Alias operator itself. ACPICA BZ 738.
1498 ----------------------------------------
1499 26 September 2008. Summary of changes for version 20080926:
1501 1) ACPI CA Core Subsystem:
1503 Designed and implemented a mechanism to validate predefined ACPI methods and
1504 objects. This code validates the predefined ACPI objects (objects whose names
1505 start with underscore) that appear in the namespace, at the time they are
1506 evaluated. The argument count and the type of the returned object are
1507 validated against the ACPI specification. The purpose of this validation is
1508 to detect problems with the BIOS-implemented predefined ACPI objects before
1509 the results are returned to the ACPI-related drivers. Future enhancements may
1510 include actual repair of incorrect return objects where possible. Two new
1511 files are nspredef.c and acpredef.h.
1513 Fixed a fault in the AML parser if a memory allocation fails during the Op
1514 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
1516 Fixed an issue with implicit return compatibility. This change improves the
1517 implicit return mechanism to be more compatible with the MS interpreter. Lin
1518 Ming, ACPICA BZ 349.
1520 Implemented support for zero-length buffer-to-string conversions. Allow zero
1521 length strings during interpreter buffer-to-string conversions. For example,
1522 during the ToDecimalString and ToHexString operators, as well as implicit
1523 conversions. Fiodor Suietov, ACPICA BZ 585.
1525 Fixed two possible memory leaks in the error exit paths of
1526 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
1527 similar in that they use a stack of state objects in order to eliminate
1528 recursion. The stack must be fully unwound and deallocated if an error
1529 occurs. Lin Ming. ACPICA BZ 383.
1531 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
1532 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
1533 Moore ACPICA BZ 442.
1535 Removed the obsolete version number in module headers. Removed the
1536 "$Revision" number that appeared in each module header. This version number
1537 was useful under SourceSafe and CVS, but has no meaning under git. It is not
1538 only incorrect, it could also be misleading.
1540 Example Code and Data Size: These are the sizes for the OS-independent
1541 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1542 debug version of the code includes the debug output trace mechanism and has a
1543 much larger code and data size.
1546 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1547 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1549 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
1550 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
1552 ----------------------------------------
1553 29 August 2008. Summary of changes for version 20080829:
1555 1) ACPI CA Core Subsystem:
1557 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
1558 Reference. Changes include the elimination of cheating on the Object field
1559 for the DdbHandle subtype, addition of a reference class field to
1560 differentiate the various reference types (instead of an AML opcode), and the
1561 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
1563 Reduce an error to a warning for an incorrect method argument count.
1564 Previously aborted with an error if too few arguments were passed to a
1565 control method via the external ACPICA interface. Now issue a warning instead
1566 and continue. Handles the case where the method inadvertently declares too
1567 many arguments, but does not actually use the extra ones. Applies mainly to
1568 the predefined methods. Lin Ming. Linux BZ 11032.
1570 Disallow the evaluation of named object types with no intrinsic value. Return
1571 AE_TYPE for objects that have no value and therefore evaluation is undefined:
1572 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
1573 these types were allowed, but an exception would be generated at some point
1574 during the evaluation. Now, the error is generated up front.
1576 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
1577 (nsnames.c). Fixes a leak in the error exit path.
1579 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
1580 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
1581 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
1584 Removed obsolete and/or unused exception codes from the acexcep.h header.
1585 There is the possibility that certain device drivers may be affected if they
1586 use any of these exceptions.
1588 The ACPICA documentation has been added to the public git source tree, under
1589 acpica/documents. Included are the ACPICA programmer reference, the iASL
1590 compiler reference, and the changes.txt release logfile.
1592 Example Code and Data Size: These are the sizes for the OS-independent
1593 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1594 debug version of the code includes the debug output trace mechanism and has a
1595 much larger code and data size.
1598 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1599 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1601 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1602 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1604 2) iASL Compiler/Disassembler and Tools:
1606 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
1607 defines _SCP with 3 arguments. Previous versions defined it with only 1
1608 argument. iASL now allows both definitions.
1610 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
1611 length subtables when disassembling ACPI tables. Also fixed a couple of
1612 errors where a full 16-bit table type field was not extracted from the input
1615 acpisrc: Improve comment counting mechanism for generating source code
1616 statistics. Count first and last lines of multi-line comments as whitespace,
1617 not comment lines. Handle Linux legal header in addition to standard acpica
1620 ----------------------------------------
1622 29 July 2008. Summary of changes for version 20080729:
1624 1) ACPI CA Core Subsystem:
1626 Fix a possible deadlock in the GPE dispatch. Remove call to
1627 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
1628 to acquire the GPE lock but can deadlock since the GPE lock is already held
1629 at dispatch time. This code was introduced in version 20060831 as a response
1630 to Linux BZ 6881 and has since been removed from Linux.
1632 Add a function to dereference returned reference objects. Examines the return
1633 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
1634 automatically dereferenced in an attempt to return something useful (these
1635 reference types cannot be converted into an external ACPI_OBJECT.) Provides
1636 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
1638 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
1639 subtables for the MADT and one new subtable for the SRAT. Includes
1640 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
1641 Specification, June 2008.
1643 Additional error checking for pathname utilities. Add error check after all
1644 calls to AcpiNsGetPathnameLength. Add status return from
1645 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
1646 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
1648 Return status from the global init function AcpiUtGlobalInitialize. This is
1649 used by both the kernel subsystem and the utilities such as iASL compiler.
1650 The function could possibly fail when the caches are initialized. Yang Yi.
1652 Add a function to decode reference object types to strings. Created for
1653 improved error messages.
1655 Improve object conversion error messages. Better error messages during object
1656 conversion from internal to the external ACPI_OBJECT. Used for external calls
1657 to AcpiEvaluateObject.
1659 Example Code and Data Size: These are the sizes for the OS-independent
1660 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1661 debug version of the code includes the debug output trace mechanism and has a
1662 much larger code and data size.
1665 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1666 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1668 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1669 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1671 2) iASL Compiler/Disassembler and Tools:
1673 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
1674 introduced in version 20080701. If the object being evaluated (via execute
1675 command) is not a method, the debugger can hang while trying to obtain non-
1676 existent parameters.
1678 iASL: relax error for using reserved "_T_x" identifiers. These names can
1679 appear in a disassembled ASL file if they were emitted by the original
1680 compiler. Instead of issuing an error or warning and forcing the user to
1681 manually change these names, issue a remark instead.
1683 iASL: error if named object created in while loop. Emit an error if any named
1684 object is created within a While loop. If allowed, this code will generate a
1685 run-time error on the second iteration of the loop when an attempt is made to
1686 create the same named object twice. ACPICA bugzilla 730.
1688 iASL: Support absolute pathnames for include files. Add support for absolute
1689 pathnames within the Include operator. previously, only relative pathnames
1692 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
1693 The ACPI spec requires one interrupt minimum. BZ 423
1695 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
1696 Handles the case for the Interrupt Resource Descriptor where
1697 the ResourceSource argument is omitted but ResourceSourceIndex
1698 is present. Now leave room for the Index. BZ 426
1700 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
1701 where an error message is emitted if the target does not exist. BZ 516
1703 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
1704 (get ACPI tables on Windows). This was apparently broken in version 20070919.
1706 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
1707 the EOF happens immediately after the last table in the input file. Print
1708 completion message. Previously, no message was displayed in this case.
1710 ----------------------------------------
1711 01 July 2008. Summary of changes for version 20080701:
1713 0) Git source tree / acpica.org
1715 Fixed a problem where a git-clone from http would not transfer the entire
1718 1) ACPI CA Core Subsystem:
1720 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
1721 enable bit. Now performs a read-change-write of the enable register instead
1722 of simply writing out the cached enable mask. This will prevent inadvertent
1723 enabling of GPEs if a rogue GPE is received during initialization (before GPE
1724 handlers are installed.)
1726 Implemented a copy for dynamically loaded tables. Previously, dynamically
1727 loaded tables were simply mapped - but on some machines this memory is
1728 corrupted after suspend. Now copy the table to a local buffer. For the
1729 OpRegion case, added checksum verify. Use the table length from the table
1730 header, not the region length. For the Buffer case, use the table length
1731 also. Dennis Noordsij, Bob Moore. BZ 10734
1733 Fixed a problem where the same ACPI table could not be dynamically loaded and
1734 unloaded more than once. Without this change, a table cannot be loaded again
1735 once it has been loaded/unloaded one time. The current mechanism does not
1736 unregister a table upon an unload. During a load, if the same table is found,
1737 this no longer returns an exception. BZ 722
1739 Fixed a problem where the wrong descriptor length was calculated for the
1740 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
1741 are calculated as 12 bytes long, but the actual length in the internal
1742 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
1743 by Linn Crosetto. BZ 728
1745 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
1746 by Load() did not have its reference count decremented during unload, leading
1747 to a memory leak. Lin Ming. BZ 727
1749 Fixed a possible memory leak when deleting thermal/processor objects. Any
1750 associated notify handlers (and objects) were not being deleted. Fiodor
1753 Fixed the ordering of the ASCII names in the global mutex table to match the
1754 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
1755 Vegard Nossum. BZ 726
1757 Enhanced the AcpiGetObjectInfo interface to return the number of required
1758 arguments if the object is a control method. Added this call to the debugger
1759 so the proper number of default arguments are passed to a method. This
1760 prevents a warning when executing methods from AcpiExec.
1762 Added a check for an invalid handle in AcpiGetObjectInfo. Return
1763 AE_BAD_PARAMETER if input handle is invalid. BZ 474
1765 Fixed an extraneous warning from exconfig.c on the 64-bit build.
1767 Example Code and Data Size: These are the sizes for the OS-independent
1768 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1769 debug version of the code includes the debug output trace mechanism and has a
1770 much larger code and data size.
1773 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1774 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1776 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1777 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1779 2) iASL Compiler/Disassembler and Tools:
1781 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
1782 resource descriptor names.
1784 iASL: Detect invalid ASCII characters in input (windows version). Removed the
1785 "-CF" flag from the flex compile, enables correct detection of non-ASCII
1786 characters in the input. BZ 441
1788 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
1789 "result of operation not used" warning when the DDB handle returned from
1790 LoadTable is not used. The warning is not needed. BZ 590
1792 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
1793 pass address of table to the AML. Added option to disable OpRegion simulation
1794 to allow creation of an OpRegion with a real address that was passed to _CFG.
1795 All of this allows testing of the Load and Unload operators from AcpiExec.
1797 Debugger: update tables command for unloaded tables. Handle unloaded tables
1798 and use the standard table header output routine.
1800 ----------------------------------------
1801 09 June 2008. Summary of changes for version 20080609:
1803 1) ACPI CA Core Subsystem:
1805 Implemented a workaround for reversed _PRT entries. A significant number of
1806 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
1807 change dynamically detects and repairs this problem. Provides compatibility
1808 with MS ACPI. BZ 6859
1810 Simplified the internal ACPI hardware interfaces to eliminate the locking
1811 flag parameter from Register Read/Write. Added a new external interface,
1812 AcpiGetRegisterUnlocked.
1814 Fixed a problem where the invocation of a GPE control method could hang. This
1815 was a regression introduced in 20080514. The new method argument count
1816 validation mechanism can enter an infinite loop when a GPE method is
1817 dispatched. Problem fixed by removing the obsolete code that passed GPE block
1818 information to the notify handler via the control method parameter pointer.
1820 Fixed a problem where the _SST execution status was incorrectly returned to
1821 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
1822 20080514. _SST is optional and a NOT_FOUND exception should never be
1825 Fixed a problem where a deleted object could be accessed from within the AML
1826 parser. This was a regression introduced in version 20080123 as a fix for the
1827 Unload operator. Lin Ming. BZ 10669
1829 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
1830 and eliminated the use of a negative index in a loop. Operands are now
1831 displayed in the correct order, not backwards. This also fixes a regression
1832 introduced in 20080514 on 64-bit systems where the elimination of
1833 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
1835 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
1836 path did not delete a locally allocated structure.
1838 Updated definitions for the DMAR and SRAT tables to synchronize with the
1839 current specifications. Includes disassembler support.
1841 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
1842 loop termination value was used. Loop terminated on iteration early, missing
1843 one mutex. Linn Crosetto
1845 Example Code and Data Size: These are the sizes for the OS-independent
1846 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1847 debug version of the code includes the debug output trace mechanism and has a
1848 much larger code and data size.
1851 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1852 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1854 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1855 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1857 2) iASL Compiler/Disassembler and Tools:
1859 Disassembler: Implemented support for EisaId() within _CID objects. Now
1860 disassemble integer _CID objects back to EisaId invocations, including
1861 multiple integers within _CID packages. Includes single-step support for
1864 Disassembler: Added support for DMAR and SRAT table definition changes.
1866 ----------------------------------------
1867 14 May 2008. Summary of changes for version 20080514:
1869 1) ACPI CA Core Subsystem:
1871 Fixed a problem where GPEs were enabled too early during the ACPICA
1872 initialization. This could lead to "handler not installed" errors on some
1873 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
1874 ensures that all operation regions and devices throughout the namespace have
1875 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
1877 Implemented a change to the enter sleep code. Moved execution of the _GTS
1878 method to just before setting sleep enable bit. The execution was moved from
1879 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
1880 immediately before the SLP_EN bit is set, as per the ACPI specification.
1883 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
1884 the GPE, even if ACPICA thinks that that it is already disabled. It is
1885 possible that the AML or some other code has enabled the GPE unbeknownst to
1888 Fixed a problem with the Field operator where zero-length fields would return
1889 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
1890 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
1892 Implemented a fix for the Load operator, now load the table at the namespace
1893 root. This reverts a change introduced in version 20071019. The table is now
1894 loaded at the namespace root even though this goes against the ACPI
1895 specification. This provides compatibility with other ACPI implementations.
1896 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
1898 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
1899 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
1900 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
1901 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
1902 signatures, ACPICA must be compatible. BZ 10454.
1904 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
1905 fields to the exception string arrays to eliminate a -1 subtraction on the
1908 Updated the debug tracking macros to reduce overall code and data size.
1909 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
1910 instead of pointers to static strings. Jan Beulich and Bob Moore.
1912 Implemented argument count checking in control method invocation via
1913 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
1914 many. This applies only to extern programmatic control method execution, not
1915 method-to-method calls within the AML. Lin Ming.
1917 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
1918 longer needed, especially with the removal of 16-bit support. It was replaced
1919 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
1920 32/64-bit platforms is required.
1922 Added the C const qualifier for appropriate string constants -- mostly
1923 MODULE_NAME and printf format strings. Jan Beulich.
1925 Example Code and Data Size: These are the sizes for the OS-independent
1926 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1927 debug version of the code includes the debug output trace mechanism and has a
1928 much larger code and data size.
1931 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1932 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1934 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1935 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1937 2) iASL Compiler/Disassembler and Tools:
1939 Implemented ACPI table revision ID validation in the disassembler. Zero is
1940 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
1941 means 32-bit and this is unusual. 2 or greater is 64-bit.
1943 ----------------------------------------
1944 21 March 2008. Summary of changes for version 20080321:
1946 1) ACPI CA Core Subsystem:
1948 Implemented an additional change to the GPE support in order to suppress
1949 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
1950 disable incoming GPEs that are neither enabled nor disabled -- meaning that
1951 the GPE is unknown to the system. This should prevent future interrupt floods
1952 from that GPE. BZ 6217 (Zhang Rui)
1954 Fixed a problem where NULL package elements were not returned to the
1955 AcpiEvaluateObject interface correctly. The element was simply ignored
1956 instead of returning a NULL ACPI_OBJECT package element, potentially causing
1957 a buffer overflow and/or confusing the caller who expected a fixed number of
1958 elements. BZ 10132 (Lin Ming, Bob Moore)
1960 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
1961 Qword), Field, BankField, and IndexField operators when invoked from inside
1962 an executing control method. In this case, these operators created namespace
1963 nodes that were incorrectly left marked as permanent nodes instead of
1964 temporary nodes. This could cause a problem if there is race condition
1965 between an exiting control method and a running namespace walk. (Reported by
1968 Fixed a problem where the CreateField and CreateXXXField operators would
1969 incorrectly allow duplicate names (the name of the field) with no exception
1972 Implemented several changes for Notify handling. Added support for new Notify
1973 values (ACPI 2.0+) and improved the Notify debug output. Notify on
1974 PowerResource objects is no longer allowed, as per the ACPI specification.
1975 (Bob Moore, Zhang Rui)
1977 All Reference Objects returned via the AcpiEvaluateObject interface are now
1978 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
1979 NULL objects - either NULL package elements or unresolved named references.
1981 Fixed a problem where an extraneous debug message was produced for package
1982 objects (when debugging enabled). The message "Package List length larger
1983 than NumElements count" is now produced in the correct case, and is now an
1984 error message rather than a debug message. Added a debug message for the
1985 opposite case, where NumElements is larger than the Package List (the package
1986 will be padded out with NULL elements as per the ACPI spec.)
1988 Implemented several improvements for the output of the ASL "Debug" object to
1989 clarify and keep all data for a given object on one output line.
1991 Fixed two size calculation issues with the variable-length Start Dependent
1992 resource descriptor.
1994 Example Code and Data Size: These are the sizes for the OS-independent
1995 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1996 debug version of the code includes the debug output trace mechanism and has
1997 a much larger code and data size.
2000 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
2001 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
2003 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
2004 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
2006 2) iASL Compiler/Disassembler and Tools:
2008 Fixed a problem with the use of the Switch operator where execution of the
2009 containing method by multiple concurrent threads could cause an
2010 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
2011 actual Switch opcode, it must be simulated with local named temporary
2012 variables and if/else pairs. The solution chosen was to mark any method that
2013 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
2015 ----------------------------------------
2016 13 February 2008. Summary of changes for version 20080213:
2018 1) ACPI CA Core Subsystem:
2020 Implemented another MS compatibility design change for GPE/Notify handling.
2021 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
2022 complete first. It is expected that the OSL will queue the enable request
2023 behind all pending notify requests (may require changes to the local host OSL
2024 in AcpiOsExecute). Alexey Starikovskiy.
2026 Fixed a problem where buffer and package objects passed as arguments to a
2027 control method via the external AcpiEvaluateObject interface could cause an
2028 AE_AML_INTERNAL exception depending on the order and type of operators
2029 executed by the target control method.
2031 Fixed a problem where resource descriptor size optimization could cause a
2032 problem when a _CRS resource template is passed to a _SRS method. The _SRS
2033 resource template must use the same descriptors (with the same size) as
2034 returned from _CRS. This change affects the following resource descriptors:
2035 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
2037 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
2038 objects did not perform an implicit conversion as it should. These types must
2039 retain their initial type permanently as per the ACPI specification. However,
2040 a CopyObject to all other object types should not perform an implicit
2041 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
2043 Fixed a problem with the AcpiGetDevices interface where the mechanism to
2044 match device CIDs did not examine the entire list of available CIDs, but
2045 instead aborted on the first non-matching CID. Andrew Patterson.
2047 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
2048 inadvertently changed to return a 16-bit value instead of a 32-bit value,
2049 truncating the upper dword of a 64-bit value. This macro is only used to
2050 display debug output, so no incorrect calculations were made. Also,
2051 reimplemented the macro so that a 64-bit shift is not performed by
2052 inefficient compilers.
2054 Added missing va_end statements that should correspond with each va_start
2057 Example Code and Data Size: These are the sizes for the OS-independent
2058 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2059 debug version of the code includes the debug output trace mechanism and has
2060 a much larger code and data size.
2063 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
2064 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
2066 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
2067 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
2069 2) iASL Compiler/Disassembler and Tools:
2071 Implemented full disassembler support for the following new ACPI tables:
2072 BERT, EINJ, and ERST. Implemented partial disassembler support for the
2073 complicated HEST table. These tables support the Windows Hardware Error
2074 Architecture (WHEA).
2076 ----------------------------------------
2077 23 January 2008. Summary of changes for version 20080123:
2079 1) ACPI CA Core Subsystem:
2081 Added the 2008 copyright to all module headers and signons. This affects
2082 virtually every file in the ACPICA core subsystem, the iASL compiler, and
2083 the tools/utilities.
2085 Fixed a problem with the SizeOf operator when used with Package and Buffer
2086 objects. These objects have deferred execution for some arguments, and the
2087 execution is now completed before the SizeOf is executed. This problem caused
2088 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
2091 Implemented an enhancement to the interpreter "slack mode". In the absence of
2092 an explicit return or an implicitly returned object from the last executed
2093 opcode, a control method will now implicitly return an integer of value 0 for
2094 Microsoft compatibility. (Lin Ming) BZ 392
2096 Fixed a problem with the Load operator where an exception was not returned in
2097 the case where the table is already loaded. (Lin Ming) BZ 463
2099 Implemented support for the use of DDBHandles as an Indexed Reference, as per
2100 the ACPI spec. (Lin Ming) BZ 486
2102 Implemented support for UserTerm (Method invocation) for the Unload operator
2103 as per the ACPI spec. (Lin Ming) BZ 580
2105 Fixed a problem with the LoadTable operator where the OemId and OemTableId
2106 input strings could cause unexpected failures if they were shorter than the
2107 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
2109 Implemented support for UserTerm (Method invocation) for the Unload operator
2110 as per the ACPI spec. (Lin Ming) BZ 580
2112 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
2113 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
2115 Example Code and Data Size: These are the sizes for the OS-independent
2116 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2117 debug version of the code includes the debug output trace mechanism and has
2118 a much larger code and data size.
2121 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
2122 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
2124 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
2125 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
2127 2) iASL Compiler/Disassembler and Tools:
2129 Implemented support in the disassembler for checksum validation on incoming
2130 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
2131 header dump at the start of the disassembly.
2133 Implemented additional debugging information in the namespace listing file
2134 created during compilation. In addition to the namespace hierarchy, the full
2135 pathname to each namespace object is displayed.
2137 Fixed a problem with the disassembler where invalid ACPI tables could cause
2138 faults or infinite loops.
2140 Fixed an unexpected parse error when using the optional "parameter types"
2141 list in a control method declaration. (Lin Ming) BZ 397
2143 Fixed a problem where two External declarations with the same name did not
2144 cause an error (Lin Ming) BZ 509
2146 Implemented support for full TermArgs (adding Argx, Localx and method
2147 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
2150 ----------------------------------------
2151 19 December 2007. Summary of changes for version 20071219:
2153 1) ACPI CA Core Subsystem:
2155 Implemented full support for deferred execution for the TermArg string
2156 arguments for DataTableRegion. This enables forward references and full
2157 operand resolution for the three string arguments. Similar to OperationRegion
2158 deferred argument execution.) Lin Ming. BZ 430
2160 Implemented full argument resolution support for the BankValue argument to
2161 BankField. Previously, only constants were supported, now any TermArg may be
2162 used. Lin Ming BZ 387, 393
2164 Fixed a problem with AcpiGetDevices where the search of a branch of the
2165 device tree could be terminated prematurely. In accordance with the ACPI
2166 specification, the search down the current branch is terminated if a device
2167 is both not present and not functional (instead of just not present.) Yakui
2170 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
2171 the underlying AML code changed the GPE enable registers. Now, any unknown
2172 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
2173 instead of simply ignored. Rui Zhang.
2175 Fixed a problem with Index Fields where the Index register was incorrectly
2176 limited to a maximum of 32 bits. Now any size may be used.
2178 Fixed a couple memory leaks associated with "implicit return" objects when
2179 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
2181 Example Code and Data Size: These are the sizes for the OS-independent
2182 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2183 debug version of the code includes the debug output trace mechanism and has
2184 a much larger code and data size.
2187 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
2188 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
2190 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
2191 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
2193 ----------------------------------------
2194 14 November 2007. Summary of changes for version 20071114:
2196 1) ACPI CA Core Subsystem:
2198 Implemented event counters for each of the Fixed Events, the ACPI SCI
2199 (interrupt) itself, and control methods executed. Named
2200 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
2201 should be useful for debugging and statistics.
2203 Implemented a new external interface, AcpiGetStatistics, to retrieve the
2204 contents of the various event counters. Returns the current values for
2205 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
2206 AcpiMethodCount. The interface can be expanded in the future if new counters
2207 are added. Device drivers should use this interface rather than access the
2210 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
2211 the ShortDivide function worked incorrectly, causing problems with the BCD
2212 functions with large input values. A truncation from 64-bit to 32-bit
2213 inadvertently occurred. Internal BZ 435. Lin Ming
2215 Fixed a problem with Index references passed as method arguments. References
2216 passed as arguments to control methods were dereferenced immediately (before
2217 control was passed to the called method). The references are now correctly
2218 passed directly to the called method. BZ 5389. Lin Ming
2220 Fixed a problem with CopyObject used in conjunction with the Index operator.
2221 The reference was incorrectly dereferenced before the copy. The reference is
2222 now correctly copied. BZ 5391. Lin Ming
2224 Fixed a problem with Control Method references within Package objects. These
2225 references are now correctly generated. This completes the package
2226 construction overhaul that began in version 20071019.
2228 Example Code and Data Size: These are the sizes for the OS-independent
2229 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2230 debug version of the code includes the debug output trace mechanism and has
2231 a much larger code and data size.
2234 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
2235 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
2237 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
2238 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
2241 2) iASL Compiler/Disassembler and Tools:
2243 The AcpiExec utility now installs handlers for all of the predefined
2244 Operation Region types. New types supported are: PCI_Config, CMOS, and
2247 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
2248 bit) address fields for the DSDT and FACS within the FADT were not being
2249 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
2252 ----------------------------------------
2253 19 October 2007. Summary of changes for version 20071019:
2255 1) ACPI CA Core Subsystem:
2257 Fixed a problem with the Alias operator when the target of the alias is a
2258 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
2259 Processor, and ThermalZone. In these cases, any children of the original
2260 operator could not be accessed via the alias, potentially causing unexpected
2261 AE_NOT_FOUND exceptions. (BZ 9067)
2263 Fixed a problem with the Package operator where all named references were
2264 created as object references and left otherwise unresolved. According to the
2265 ACPI specification, a Package can only contain Data Objects or references to
2266 control methods. The implication is that named references to Data Objects
2267 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
2268 immediately upon package creation. This is the approach taken with this
2269 change. References to all other named objects (Methods, Devices, Scopes,
2270 etc.) are all now properly created as reference objects. (BZ 5328)
2272 Reverted a change to Notify handling that was introduced in version
2273 20070508. This version changed the Notify handling from asynchronous to
2274 fully synchronous (Device driver Notify handling with respect to the Notify
2275 ASL operator). It was found that this change caused more problems than it
2276 solved and was removed by most users.
2278 Fixed a problem with the Increment and Decrement operators where the type of
2279 the target object could be unexpectedly and incorrectly changed. (BZ 353)
2282 Fixed a problem with the Load and LoadTable operators where the table
2283 location within the namespace was ignored. Instead, the table was always
2284 loaded into the root or current scope. Lin Ming.
2286 Fixed a problem with the Load operator when loading a table from a buffer
2287 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
2289 Fixed a problem with the Debug object where a store of a DdbHandle reference
2290 object to the Debug object could cause a fault.
2292 Added a table checksum verification for the Load operator, in the case where
2293 the load is from a buffer. (BZ 578).
2295 Implemented additional parameter validation for the LoadTable operator. The
2296 length of the input strings SignatureString, OemIdString, and OemTableId are
2297 now checked for maximum lengths. (BZ 582) Lin Ming.
2299 Example Code and Data Size: These are the sizes for the OS-independent
2300 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2301 debug version of the code includes the debug output trace mechanism and has
2302 a much larger code and data size.
2305 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
2306 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
2308 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
2309 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
2312 2) iASL Compiler/Disassembler:
2314 Fixed a problem where if a single file was specified and the file did not
2315 exist, no error message was emitted. (Introduced with wildcard support in
2318 ----------------------------------------
2319 19 September 2007. Summary of changes for version 20070919:
2321 1) ACPI CA Core Subsystem:
2323 Designed and implemented new external interfaces to install and remove
2324 handlers for ACPI table-related events. Current events that are defined are
2325 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
2326 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
2327 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
2329 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
2330 (acpi_serialized option on Linux) could cause some systems to hang during
2331 initialization. (Bob Moore) BZ 8171
2333 Fixed a problem where objects of certain types (Device, ThermalZone,
2334 Processor, PowerResource) can be not found if they are declared and
2335 referenced from within the same control method (Lin Ming) BZ 341
2337 Example Code and Data Size: These are the sizes for the OS-independent
2338 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2339 debug version of the code includes the debug output trace mechanism and has
2340 a much larger code and data size.
2343 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
2344 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
2346 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
2347 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
2350 2) iASL Compiler/Disassembler:
2352 Implemented support to allow multiple files to be compiled/disassembled in a
2353 single invocation. This includes command line wildcard support for both the
2354 Windows and Unix versions of the compiler. This feature simplifies the
2355 disassembly and compilation of multiple ACPI tables in a single directory.
2357 ----------------------------------------
2358 08 May 2007. Summary of changes for version 20070508:
2360 1) ACPI CA Core Subsystem:
2362 Implemented a Microsoft compatibility design change for the handling of the
2363 Notify AML operator. Previously, notify handlers were dispatched and
2364 executed completely asynchronously in a deferred thread. The new design
2365 still executes the notify handlers in a different thread, but the original
2366 thread that executed the Notify() now waits at a synchronization point for
2367 the notify handler to complete. Some machines depend on a synchronous Notify
2368 operator in order to operate correctly.
2370 Implemented support to allow Package objects to be passed as method
2371 arguments to the external AcpiEvaluateObject interface. Previously, this
2372 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
2373 implemented since there were no reserved control methods that required it
2376 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
2377 contained invalid non-zero values in reserved fields could cause later
2378 failures because these fields have meaning in later revisions of the FADT.
2379 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
2380 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
2382 Fixed a problem where the Global Lock handle was not properly updated if a
2383 thread that acquired the Global Lock via executing AML code then attempted
2384 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
2387 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
2388 could be corrupted if the interrupt being removed was at the head of the
2389 list. Reported by Linn Crosetto.
2391 Example Code and Data Size: These are the sizes for the OS-independent
2392 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2393 debug version of the code includes the debug output trace mechanism and has
2394 a much larger code and data size.
2397 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2398 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
2400 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
2401 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
2403 ----------------------------------------
2404 20 March 2007. Summary of changes for version 20070320:
2406 1) ACPI CA Core Subsystem:
2408 Implemented a change to the order of interpretation and evaluation of AML
2409 operand objects within the AML interpreter. The interpreter now evaluates
2410 operands in the order that they appear in the AML stream (and the
2411 corresponding ASL code), instead of in the reverse order (after the entire
2412 operand list has been parsed). The previous behavior caused several subtle
2413 incompatibilities with the Microsoft AML interpreter as well as being
2414 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
2416 Implemented a change to the ACPI Global Lock support. All interfaces to the
2417 global lock now allow the same thread to acquire the lock multiple times.
2418 This affects the AcpiAcquireGlobalLock external interface to the global lock
2419 as well as the internal use of the global lock to support AML fields -- a
2420 control method that is holding the global lock can now simultaneously access
2421 AML fields that require global lock protection. Previously, in both cases,
2422 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
2423 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
2424 Controller. There is no change to the behavior of the AML Acquire operator,
2425 as this can already be used to acquire a mutex multiple times by the same
2426 thread. BZ 8066. With assistance from Alexey Starikovskiy.
2428 Fixed a problem where invalid objects could be referenced in the AML
2429 Interpreter after error conditions. During operand evaluation, ensure that
2430 the internal "Return Object" field is cleared on error and only valid
2431 pointers are stored there. Caused occasional access to deleted objects that
2432 resulted in "large reference count" warning messages. Valery Podrezov.
2434 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
2435 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
2438 Fixed an internal problem with the handling of result objects on the
2439 interpreter result stack. BZ 7872. Valery Podrezov.
2441 Removed obsolete code that handled the case where AML_NAME_OP is the target
2442 of a reference (Reference.Opcode). This code was no longer necessary. BZ
2443 7874. Valery Podrezov.
2445 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
2446 remnant from the previously discontinued 16-bit support.
2448 Example Code and Data Size: These are the sizes for the OS-independent
2449 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2450 debug version of the code includes the debug output trace mechanism and has
2451 a much larger code and data size.
2454 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2455 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2457 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2458 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
2460 ----------------------------------------
2461 26 January 2007. Summary of changes for version 20070126:
2463 1) ACPI CA Core Subsystem:
2465 Added the 2007 copyright to all module headers and signons. This affects
2466 virtually every file in the ACPICA core subsystem, the iASL compiler, and
2469 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
2470 during a table load. A bad pointer was passed in the case where the DSDT is
2471 overridden, causing a fault in this case.
2473 Example Code and Data Size: These are the sizes for the OS-independent
2474 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2475 debug version of the code includes the debug output trace mechanism and has
2476 a much larger code and data size.
2479 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2480 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2482 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2483 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2485 ----------------------------------------
2486 15 December 2006. Summary of changes for version 20061215:
2488 1) ACPI CA Core Subsystem:
2490 Support for 16-bit ACPICA has been completely removed since it is no longer
2491 necessary and it clutters the code. All 16-bit macros, types, and
2492 conditional compiles have been removed, cleaning up and simplifying the code
2493 across the entire subsystem. DOS support is no longer needed since the
2494 bootable Linux firmware kit is now available.
2496 The handler for the Global Lock is now removed during AcpiTerminate to
2497 enable a clean subsystem restart, via the implementation of the
2498 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
2501 Implemented enhancements to the multithreading support within the debugger
2502 to enable improved multithreading debugging and evaluation of the subsystem.
2505 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
2506 memory used during the execution, as well as the maximum memory consumed by
2507 each of the various object types. (Valery Podrezov)
2509 Example Code and Data Size: These are the sizes for the OS-independent
2510 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2511 debug version of the code includes the debug output trace mechanism and has
2512 a much larger code and data size.
2515 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
2516 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
2518 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2519 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2522 2) iASL Compiler/Disassembler and Tools:
2524 AcpiExec: Implemented a new option (-m) to display full memory use
2525 statistics upon subsystem/program termination. (Valery Podrezov)
2527 ----------------------------------------
2528 09 November 2006. Summary of changes for version 20061109:
2530 1) ACPI CA Core Subsystem:
2532 Optimized the Load ASL operator in the case where the source operand is an
2533 operation region. Simply map the operation region memory, instead of
2534 performing a bytewise read. (Region must be of type SystemMemory, see
2537 Fixed the Load ASL operator for the case where the source operand is a
2538 region field. A buffer object is also allowed as the source operand. BZ 480
2540 Fixed a problem where the Load ASL operator allowed the source operand to be
2541 an operation region of any type. It is now restricted to regions of type
2542 SystemMemory, as per the ACPI specification. BZ 481
2544 Additional cleanup and optimizations for the new Table Manager code.
2546 AcpiEnable will now fail if all of the required ACPI tables are not loaded
2547 (FADT, FACS, DSDT). BZ 477
2549 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
2550 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
2551 manually optimized to be aligned and will not work if it is byte-packed.
2553 Example Code and Data Size: These are the sizes for the OS-independent
2554 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2555 debug version of the code includes the debug output trace mechanism and has
2556 a much larger code and data size.
2559 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2560 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2562 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
2563 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
2566 2) iASL Compiler/Disassembler and Tools:
2568 Fixed a problem where the presence of the _OSI predefined control method
2569 within complex expressions could cause an internal compiler error.
2571 AcpiExec: Implemented full region support for multiple address spaces.
2572 SpaceId is now part of the REGION object. BZ 429
2574 ----------------------------------------
2575 11 October 2006. Summary of changes for version 20061011:
2577 1) ACPI CA Core Subsystem:
2579 Completed an AML interpreter performance enhancement for control method
2580 execution. Previously a 2-pass parse/execution, control methods are now
2581 completely parsed and executed in a single pass. This improves overall
2582 interpreter performance by ~25%, reduces code size, and reduces CPU stack
2583 use. (Valery Podrezov + interpreter changes in version 20051202 that
2584 eliminated namespace loading during the pass one parse.)
2586 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
2587 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
2588 obtained and also checked for an ID match.
2590 Implemented additional support for the PCI _ADR execution: upsearch until a
2591 device scope is found before executing _ADR. This allows PCI_Config
2592 operation regions to be declared locally within control methods underneath
2595 Fixed a problem with a possible race condition between threads executing
2596 AcpiWalkNamespace and the AML interpreter. This condition was removed by
2597 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
2598 entries created during any concurrent control method execution. An
2599 additional namespace race condition is known to exist between
2600 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
2603 Restructured the AML ParseLoop function, breaking it into several
2604 subfunctions in order to reduce CPU stack use and improve maintainability.
2607 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
2608 of prefix handle and pathname. BZ 478
2610 Example Code and Data Size: These are the sizes for the OS-independent
2611 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2612 debug version of the code includes the debug output trace mechanism and has
2613 a much larger code and data size.
2616 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2617 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2619 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2620 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2622 2) iASL Compiler/Disassembler and Tools:
2624 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
2625 to restore original behavior.
2627 ----------------------------------------
2628 27 September 2006. Summary of changes for version 20060927:
2630 1) ACPI CA Core Subsystem:
2632 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
2633 These functions now use a spinlock for mutual exclusion and the interrupt
2634 level indication flag is not needed.
2636 Fixed a problem with the Global Lock where the lock could appear to be
2637 obtained before it is actually obtained. The global lock semaphore was
2638 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
2641 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
2642 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
2644 Example Code and Data Size: These are the sizes for the OS-independent
2645 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2646 debug version of the code includes the debug output trace mechanism and has
2647 a much larger code and data size.
2650 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2651 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2653 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2654 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2657 2) iASL Compiler/Disassembler and Tools:
2659 Fixed a compilation problem with the pre-defined Resource Descriptor field
2660 names where an "object does not exist" error could be incorrectly generated
2661 if the parent ResourceTemplate pathname places the template within a
2662 different namespace scope than the current scope. (BZ 7212)
2664 Fixed a problem where the compiler could hang after syntax errors detected
2665 in an ElseIf construct. (BZ 453)
2667 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
2668 operator. An incorrect output filename was produced when this parameter was
2669 a null string (""). Now, the original input filename is used as the AML
2670 output filename, with an ".aml" extension.
2672 Implemented a generic batch command mode for the AcpiExec utility (execute
2673 any AML debugger command) (Valery Podrezov).
2675 ----------------------------------------
2676 12 September 2006. Summary of changes for version 20060912:
2678 1) ACPI CA Core Subsystem:
2680 Enhanced the implementation of the "serialized mode" of the interpreter
2681 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
2682 specified, instead of creating a serialization semaphore per control method,
2683 the interpreter lock is simply no longer released before a blocking
2684 operation during control method execution. This effectively makes the AML
2685 Interpreter single-threaded. The overhead of a semaphore per-method is
2688 Fixed a regression where an error was no longer emitted if a control method
2689 attempts to create 2 objects of the same name. This once again returns
2690 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
2691 will dynamically serialize the control method to possible prevent future
2694 Integrated a fix for a problem with PCI Express HID detection in the PCI
2695 Config Space setup procedure. (BZ 7145)
2697 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
2698 AcpiHwInitialize function - the FADT registers are now validated when the
2701 Added two new warnings during FADT verification - 1) if the FADT is larger
2702 than the largest known FADT version, and 2) if there is a mismatch between a
2703 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
2705 Example Code and Data Size: These are the sizes for the OS-independent
2706 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2707 debug version of the code includes the debug output trace mechanism and has
2708 a much larger code and data size.
2711 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2712 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2714 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2715 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2718 2) iASL Compiler/Disassembler and Tools:
2720 Fixed a problem with the implementation of the Switch() operator where the
2721 temporary variable was declared too close to the actual Switch, instead of
2722 at method level. This could cause a problem if the Switch() operator is
2723 within a while loop, causing an error on the second iteration. (BZ 460)
2725 Disassembler - fix for error emitted for unknown type for target of scope
2726 operator. Now, ignore it and continue.
2728 Disassembly of an FADT now verifies the input FADT and reports any errors
2729 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
2731 Disassembly of raw data buffers with byte initialization data now prefixes
2732 each output line with the current buffer offset.
2734 Disassembly of ASF! table now includes all variable-length data fields at
2735 the end of some of the subtables.
2737 The disassembler now emits a comment if a buffer appears to be a
2738 ResourceTemplate, but cannot be disassembled as such because the EndTag does
2739 not appear at the very end of the buffer.
2741 AcpiExec - Added the "-t" command line option to enable the serialized mode
2742 of the AML interpreter.
2744 ----------------------------------------
2745 31 August 2006. Summary of changes for version 20060831:
2747 1) ACPI CA Core Subsystem:
2749 Miscellaneous fixes for the Table Manager:
2750 - Correctly initialize internal common FADT for all 64-bit "X" fields
2751 - Fixed a couple table mapping issues during table load
2752 - Fixed a couple alignment issues for IA64
2753 - Initialize input array to zero in AcpiInitializeTables
2754 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
2757 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
2758 immediately disabled to prevent the waking GPE from firing again and to
2759 prevent other wake GPEs from interrupting the wake process.
2761 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
2762 be used for debugging systems with a large number of ACPI interrupts.
2764 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
2765 both the ACPICA headers and the disassembler.
2767 Example Code and Data Size: These are the sizes for the OS-independent
2768 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2769 debug version of the code includes the debug output trace mechanism and has
2770 a much larger code and data size.
2773 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2774 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2776 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2777 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2780 2) iASL Compiler/Disassembler and Tools:
2782 Disassembler support for the DMAR ACPI table.
2784 ----------------------------------------
2785 23 August 2006. Summary of changes for version 20060823:
2787 1) ACPI CA Core Subsystem:
2789 The Table Manager component has been completely redesigned and
2790 reimplemented. The new design is much simpler, and reduces the overall code
2791 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
2792 now possible to obtain the ACPI tables very early during kernel
2793 initialization, even before dynamic memory management is initialized.
2794 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
2796 Obsolete ACPICA interfaces:
2798 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
2800 - AcpiLoadTable: Not needed.
2801 - AcpiUnloadTable: Not needed.
2803 New ACPICA interfaces:
2805 - AcpiInitializeTables: Must be called before the table manager can be used.
2806 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
2807 allocated memory after it becomes available.
2808 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
2811 Other ACPICA changes:
2813 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
2814 AcpiOsUnmapMemory to free this mapping.
2815 - AcpiGetTable returns the actual mapped table. The mapping is managed
2816 internally and must not be deleted by the caller. Use of this interface
2817 causes no additional dynamic memory allocation.
2818 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
2819 it appeared to be unused.
2820 - The interface to AcpiOsMapMemory has changed to be consistent with the
2821 other allocation interfaces.
2822 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
2824 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
2825 bit platforms. Was previously 64 bits on all platforms.
2826 - The interface to the ACPI Global Lock acquire/release macros have changed
2827 slightly since ACPICA no longer keeps a local copy of the FACS with a
2828 constructed pointer to the actual global lock.
2830 Porting to the new table manager:
2832 - AcpiInitializeTables: Must be called once, and can be called anytime
2833 during the OS initialization process. It allows the host to specify an area
2834 of memory to be used to store the internal version of the RSDT/XSDT (root
2835 table). This allows the host to access ACPI tables before memory management
2836 is initialized and running.
2837 - AcpiReallocateRootTable: Can be called after memory management is running
2838 to copy the root table to a dynamically allocated array, freeing up the
2839 scratch memory specified in the call to AcpiInitializeTables.
2840 - AcpiSubsystemInitialize: This existing interface is independent of the
2841 Table Manager, and does not have to be called before the Table Manager can
2842 be used, it only must be called before the rest of ACPICA can be used.
2843 - ACPI Tables: Some changes have been made to the names and structure of the
2844 actbl.h and actbl1.h header files and may require changes to existing code.
2845 For example, bitfields have been completely removed because of their lack of
2846 portability across C compilers.
2847 - Update interfaces to the Global Lock acquire/release macros if local
2848 versions are used. (see acwin.h)
2850 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
2854 Example Code and Data Size: These are the sizes for the OS-independent
2855 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2856 debug version of the code includes the debug output trace mechanism and has
2857 a much larger code and data size.
2860 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2861 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2863 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2864 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2867 2) iASL Compiler/Disassembler and Tools:
2869 No changes for this release.
2871 ----------------------------------------
2872 21 July 2006. Summary of changes for version 20060721:
2874 1) ACPI CA Core Subsystem:
2876 The full source code for the ASL test suite used to validate the iASL
2877 compiler and the ACPICA core subsystem is being released with the ACPICA
2878 source for the first time. The source is contained in a separate package and
2879 consists of over 1100 files that exercise all ASL/AML operators. The package
2880 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
2883 Completed a new design and implementation for support of the ACPI Global
2884 Lock. On the OS side, the global lock is now treated as a standard AML
2885 mutex. Previously, multiple OS threads could "acquire" the global lock
2886 simultaneously. However, this could cause the BIOS to be starved out of the
2887 lock - especially in cases such as the Embedded Controller driver where
2888 there is a tight coupling between the OS and the BIOS.
2890 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
2891 The Global Lock interrupt handler no longer queues the execution of a
2892 separate thread to signal the global lock semaphore. Instead, the semaphore
2893 is signaled directly from the interrupt handler.
2895 Implemented support within the AML interpreter for package objects that
2896 contain a larger AML length (package list length) than the package element
2897 count. In this case, the length of the package is truncated to match the
2898 package element count. Some BIOS code apparently modifies the package length
2899 on the fly, and this change supports this behavior. Provides compatibility
2900 with the MS AML interpreter. (With assistance from Fiodor Suietov)
2902 Implemented a temporary fix for the BankValue parameter of a Bank Field to
2903 support all constant values, now including the Zero and One opcodes.
2904 Evaluation of this parameter must eventually be converted to a full TermArg
2905 evaluation. A not-implemented error is now returned (temporarily) for non-
2906 constant values for this parameter.
2908 Fixed problem reports (Fiodor Suietov) integrated:
2909 - Fix for premature object deletion after CopyObject on Operation Region (BZ
2912 Example Code and Data Size: These are the sizes for the OS-independent
2913 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2914 debug version of the code includes the debug output trace mechanism and has
2915 a much larger code and data size.
2918 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
2919 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
2921 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2922 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2925 2) iASL Compiler/Disassembler and Tools:
2927 No changes for this release.
2929 ----------------------------------------
2930 07 July 2006. Summary of changes for version 20060707:
2932 1) ACPI CA Core Subsystem:
2934 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
2935 that do not allow the initialization of address pointers within packed
2936 structures - even though the hardware itself may support misaligned
2937 transfers. Some of the debug data structures are packed by default to
2940 Added an error message for the case where AcpiOsGetThreadId() returns zero.
2941 A non-zero value is required by the core ACPICA code to ensure the proper
2942 operation of AML mutexes and recursive control methods.
2944 The DSDT is now the only ACPI table that determines whether the AML
2945 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
2946 the hooks for per-table 32/64 switching have been removed from the code. A
2947 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
2949 Fixed a possible leak of an OwnerID in the error path of
2950 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
2951 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
2952 when using the AcpiTbDeleteTablesByType interface (with assistance from
2955 Fixed a problem with Serialized control methods where the semaphore
2956 associated with the method could be over-signaled after multiple method
2959 Fixed two issues with the locking of the internal namespace data structure.
2960 Both the Unload() operator and AcpiUnloadTable interface now lock the
2961 namespace during the namespace deletion associated with the table unload
2962 (with assistance from Linn Crosetto.)
2964 Fixed problem reports (Valery Podrezov) integrated:
2965 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
2967 Fixed problem reports (Fiodor Suietov) integrated:
2968 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
2969 - On Address Space handler deletion, needless deactivation call (BZ 374)
2970 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
2971 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
2973 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
2974 - Minimum Length of RSDT should be validated (BZ 379)
2975 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
2977 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
2980 Example Code and Data Size: These are the sizes for the OS-independent
2981 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2982 debug version of the code includes the debug output trace mechanism and has
2983 a much larger code and data size.
2986 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2987 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2989 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2990 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2993 2) iASL Compiler/Disassembler and Tools:
2995 Fixed problem reports:
2996 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2999 ----------------------------------------
3000 23 June 2006. Summary of changes for version 20060623:
3002 1) ACPI CA Core Subsystem:
3004 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
3005 allows the type to be customized to the host OS for improved efficiency
3006 (since a spinlock is usually a very small object.)
3008 Implemented support for "ignored" bits in the ACPI registers. According to
3009 the ACPI specification, these bits should be preserved when writing the
3010 registers via a read/modify/write cycle. There are 3 bits preserved in this
3011 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
3013 Implemented the initial deployment of new OSL mutex interfaces. Since some
3014 host operating systems have separate mutex and semaphore objects, this
3015 feature was requested. The base code now uses mutexes (and the new mutex
3016 interfaces) wherever a binary semaphore was used previously. However, for
3017 the current release, the mutex interfaces are defined as macros to map them
3018 to the existing semaphore interfaces. Therefore, no OSL changes are required
3019 at this time. (See acpiosxf.h)
3021 Fixed several problems with the support for the control method SyncLevel
3022 parameter. The SyncLevel now works according to the ACPI specification and
3023 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
3024 is a property of the executing thread. Mutual exclusion for control methods
3025 is now implemented with a mutex instead of a semaphore.
3027 Fixed three instances of the use of the C shift operator in the bitfield
3028 support code (exfldio.c) to avoid the use of a shift value larger than the
3029 target data width. The behavior of C compilers is undefined in this case and
3030 can cause unpredictable results, and therefore the case must be detected and
3031 avoided. (Fiodor Suietov)
3033 Added an info message whenever an SSDT or OEM table is loaded dynamically
3034 via the Load() or LoadTable() ASL operators. This should improve debugging
3035 capability since it will show exactly what tables have been loaded (beyond
3036 the tables present in the RSDT/XSDT.)
3038 Example Code and Data Size: These are the sizes for the OS-independent
3039 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3040 debug version of the code includes the debug output trace mechanism and has
3041 a much larger code and data size.
3044 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
3045 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
3047 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
3048 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
3051 2) iASL Compiler/Disassembler and Tools:
3053 No changes for this release.
3055 ----------------------------------------
3056 08 June 2006. Summary of changes for version 20060608:
3058 1) ACPI CA Core Subsystem:
3060 Converted the locking mutex used for the ACPI hardware to a spinlock. This
3061 change should eliminate all problems caused by attempting to acquire a
3062 semaphore at interrupt level, and it means that all ACPICA external
3063 interfaces that directly access the ACPI hardware can be safely called from
3064 interrupt level. OSL code that implements the semaphore interfaces should be
3065 able to eliminate any workarounds for being called at interrupt level.
3067 Fixed a regression introduced in 20060526 where the ACPI device
3068 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
3069 did not have an optional _INI method.
3071 Fixed an IndexField issue where a write to the Data Register should be
3072 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
3075 Fixed problem reports (Valery Podrezov) integrated:
3076 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
3078 Fixed problem reports (Fiodor Suietov) integrated:
3079 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
3081 Removed four global mutexes that were obsolete and were no longer being
3084 Example Code and Data Size: These are the sizes for the OS-independent
3085 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3086 debug version of the code includes the debug output trace mechanism and has
3087 a much larger code and data size.
3090 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
3091 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
3093 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
3094 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
3097 2) iASL Compiler/Disassembler and Tools:
3099 Fixed a fault when using -g option (get tables from registry) on Windows
3102 Fixed problem reports integrated:
3103 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
3104 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
3106 - Global table revision override (-r) is ignored (BZ 413)
3108 ----------------------------------------
3109 26 May 2006. Summary of changes for version 20060526:
3111 1) ACPI CA Core Subsystem:
3113 Restructured, flattened, and simplified the internal interfaces for
3114 namespace object evaluation - resulting in smaller code, less CPU stack use,
3115 and fewer interfaces. (With assistance from Mikhail Kouzmich)
3117 Fixed a problem with the CopyObject operator where the first parameter was
3118 not typed correctly for the parser, interpreter, compiler, and disassembler.
3119 Caused various errors and unexpected behavior.
3121 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
3122 produced incorrect results with some C compilers. Since the behavior of C
3123 compilers when the shift value is larger than the datatype width is
3124 apparently not well defined, the interpreter now detects this condition and
3125 simply returns zero as expected in all such cases. (BZ 395)
3127 Fixed problem reports (Valery Podrezov) integrated:
3128 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
3129 - Allow interpreter to handle nested method declarations (BZ 5361)
3131 Fixed problem reports (Fiodor Suietov) integrated:
3132 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
3133 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
3134 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
3135 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
3136 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
3137 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
3138 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
3139 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
3140 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
3141 - Status of the Global Initialization Handler call not used (BZ 366)
3142 - Incorrect object parameter to Global Initialization Handler (BZ 367)
3144 Example Code and Data Size: These are the sizes for the OS-independent
3145 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3146 debug version of the code includes the debug output trace mechanism and has
3147 a much larger code and data size.
3150 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
3151 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
3153 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
3154 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
3157 2) iASL Compiler/Disassembler and Tools:
3159 Modified the parser to allow the names IO, DMA, and IRQ to be used as
3160 namespace identifiers with no collision with existing resource descriptor
3161 macro names. This provides compatibility with other ASL compilers and is
3162 most useful for disassembly/recompilation of existing tables without parse
3163 errors. (With assistance from Thomas Renninger)
3165 Disassembler: fixed an incorrect disassembly problem with the
3166 DataTableRegion and CopyObject operators. Fixed a possible fault during
3167 disassembly of some Alias operators.
3169 ----------------------------------------
3170 12 May 2006. Summary of changes for version 20060512:
3172 1) ACPI CA Core Subsystem:
3174 Replaced the AcpiOsQueueForExecution interface with a new interface named
3175 AcpiOsExecute. The major difference is that the new interface does not have
3176 a Priority parameter, this appeared to be useless and has been replaced by a
3177 Type parameter. The Type tells the host what type of execution is being
3178 requested, such as global lock handler, notify handler, GPE handler, etc.
3179 This allows the host to queue and execute the request as appropriate for the
3180 request type, possibly using different work queues and different priorities
3181 for the various request types. This enables fixes for multithreading
3182 deadlock problems such as BZ #5534, and will require changes to all existing
3183 OS interface layers. (Alexey Starikovskiy and Bob Moore)
3185 Fixed a possible memory leak associated with the support for the so-called
3186 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
3189 Fixed a problem with the Load() operator where a table load from an
3190 operation region could overwrite an internal table buffer by up to 7 bytes
3191 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
3193 Example Code and Data Size: These are the sizes for the OS-independent
3194 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3195 debug version of the code includes the debug output trace mechanism and has
3196 a much larger code and data size.
3199 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
3200 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
3202 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
3203 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
3207 2) iASL Compiler/Disassembler and Tools:
3209 Disassembler: Implemented support to cross reference the internal namespace
3210 and automatically generate ASL External() statements for symbols not defined
3211 within the current table being disassembled. This will simplify the
3212 disassembly and recompilation of interdependent tables such as SSDTs since
3213 these statements will no longer have to be added manually.
3215 Disassembler: Implemented experimental support to automatically detect
3216 invocations of external control methods and generate appropriate External()
3217 statements. This is problematic because the AML cannot be correctly parsed
3218 until the number of arguments for each control method is known. Currently,
3219 standalone method invocations and invocations as the source operand of a
3220 Store() statement are supported.
3222 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
3223 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
3224 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
3225 more readable and likely closer to the original ASL source.
3227 ----------------------------------------
3228 21 April 2006. Summary of changes for version 20060421:
3230 1) ACPI CA Core Subsystem:
3232 Removed a device initialization optimization introduced in 20051216 where
3233 the _STA method was not run unless an _INI was also present for the same
3234 device. This optimization could cause problems because it could allow _INI
3235 methods to be run within a not-present device subtree. (If a not-present
3236 device had no _INI, _STA would not be run, the not-present status would not
3237 be discovered, and the children of the device would be incorrectly
3240 Implemented a new _STA optimization where namespace subtrees that do not
3241 contain _INI are identified and ignored during device initialization.
3242 Selectively running _STA can significantly improve boot time on large
3243 machines (with assistance from Len Brown.)
3245 Implemented support for the device initialization case where the returned
3246 _STA flags indicate a device not-present but functioning. In this case, _INI
3247 is not run, but the device children are examined for presence, as per the
3250 Implemented an additional change to the IndexField support in order to
3251 conform to MS behavior. The value written to the Index Register is not
3252 simply a byte offset, it is a byte offset in units of the access width of
3253 the parent Index Field. (Fiodor Suietov)
3255 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
3256 interface is called during the creation of all AML operation regions, and
3257 allows the host OS to exert control over what addresses it will allow the
3258 AML code to access. Operation Regions whose addresses are disallowed will
3259 cause a runtime exception when they are actually accessed (will not affect
3260 or abort table loading.) See oswinxf or osunixxf for an example
3263 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
3264 interface allows the host OS to match the various "optional"
3265 interface/behavior strings for the _OSI predefined control method as
3266 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
3267 for an example implementation.
3269 Restructured and corrected various problems in the exception handling code
3270 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
3271 (with assistance from Takayoshi Kochi.)
3273 Modified the Linux source converter to ignore quoted string literals while
3274 converting identifiers from mixed to lower case. This will correct problems
3275 with the disassembler and other areas where such strings must not be
3278 The ACPI_FUNCTION_* macros no longer require quotes around the function
3279 name. This allows the Linux source converter to convert the names, now that
3280 the converter ignores quoted strings.
3282 Example Code and Data Size: These are the sizes for the OS-independent
3283 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3284 debug version of the code includes the debug output trace mechanism and has
3285 a much larger code and data size.
3289 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
3290 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
3292 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
3293 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
3296 2) iASL Compiler/Disassembler and Tools:
3298 Implemented 3 new warnings for iASL, and implemented multiple warning levels
3301 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
3302 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
3303 check for the possible timeout, a warning is issued.
3305 2) Useless operators: If an ASL operator does not specify an optional target
3306 operand and it also does not use the function return value from the
3307 operator, a warning is issued since the operator effectively does nothing.
3309 3) Unreferenced objects: If a namespace object is created, but never
3310 referenced, a warning is issued. This is a warning level 2 since there are
3311 cases where this is ok, such as when a secondary table is loaded that uses
3312 the unreferenced objects. Even so, care is taken to only flag objects that
3313 don't look like they will ever be used. For example, the reserved methods
3314 (starting with an underscore) are usually not referenced because it is
3315 expected that the OS will invoke them.
3317 ----------------------------------------
3318 31 March 2006. Summary of changes for version 20060331:
3320 1) ACPI CA Core Subsystem:
3322 Implemented header file support for the following additional ACPI tables:
3323 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
3324 all current and known ACPI tables are now defined in the ACPICA headers and
3325 are available for use by device drivers and other software.
3327 Implemented support to allow tables that contain ACPI names with invalid
3328 characters to be loaded. Previously, this would cause the table load to
3329 fail, but since there are several known cases of such tables on existing
3330 machines, this change was made to enable ACPI support for them. Also, this
3331 matches the behavior of the Microsoft ACPI implementation.
3333 Fixed a couple regressions introduced during the memory optimization in the
3334 20060317 release. The namespace node definition required additional
3335 reorganization and an internal datatype that had been changed to 8-bit was
3336 restored to 32-bit. (Valery Podrezov)
3338 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
3339 could be passed through to AcpiOsReleaseObject which is unexpected. Such
3340 null pointers are now trapped and ignored, matching the behavior of the
3341 previous implementation before the deployment of AcpiOsReleaseObject.
3342 (Valery Podrezov, Fiodor Suietov)
3344 Fixed a memory mapping leak during the deletion of a SystemMemory operation
3345 region where a cached memory mapping was not deleted. This became a
3346 noticeable problem for operation regions that are defined within frequently
3347 used control methods. (Dana Meyers)
3349 Reorganized the ACPI table header files into two main files: one for the
3350 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
3351 ACPI tables that are consumed by the drivers and other software. The various
3352 FADT definitions were merged into one common section and three different
3353 tables (ACPI 1.0, 1.0+, and 2.0)
3355 Example Code and Data Size: These are the sizes for the OS-independent
3356 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3357 debug version of the code includes the debug output trace mechanism and has
3358 a much larger code and data size.
3361 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
3362 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
3364 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
3365 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
3368 2) iASL Compiler/Disassembler and Tools:
3370 Disassembler: Implemented support to decode and format all non-AML ACPI
3371 tables (tables other than DSDTs and SSDTs.) This includes the new tables
3372 added to the ACPICA headers, therefore all current and known ACPI tables are
3375 Disassembler: The change to allow ACPI names with invalid characters also
3376 enables the disassembly of such tables. Invalid characters within names are
3377 changed to '*' to make the name printable; the iASL compiler will still
3378 generate an error for such names, however, since this is an invalid ACPI
3381 Implemented an option for AcpiXtract (-a) to extract all tables found in the
3382 input file. The default invocation extracts only the DSDTs and SSDTs.
3384 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
3385 makefile for the AcpiXtract utility.
3387 ----------------------------------------
3388 17 March 2006. Summary of changes for version 20060317:
3390 1) ACPI CA Core Subsystem:
3392 Implemented the use of a cache object for all internal namespace nodes.
3393 Since there are about 1000 static nodes in a typical system, this will
3394 decrease memory use for cache implementations that minimize per-allocation
3395 overhead (such as a slab allocator.)
3397 Removed the reference count mechanism for internal namespace nodes, since it
3398 was deemed unnecessary. This reduces the size of each namespace node by
3399 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
3400 and 32 bytes for the 64-bit case.
3402 Optimized several internal data structures to reduce object size on 64-bit
3403 platforms by packing data within the 64-bit alignment. This includes the
3404 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
3405 instances corresponding to the namespace objects.
3407 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
3410 Split the allocation tracking mechanism out to a separate file, from
3411 utalloc.c to uttrack.c. This mechanism appears to be only useful for
3412 application-level code. Kernels may wish to not include uttrack.c in
3415 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
3416 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
3419 Code and Data Size: These are the sizes for the acpica.lib produced by the
3420 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3421 driver or OSPM code. The debug version of the code includes the debug output
3422 trace mechanism and has a much larger code and data size. Note that these
3423 values will vary depending on the efficiency of the compiler and the
3424 compiler options used during generation.
3427 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3428 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
3430 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
3431 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
3434 2) iASL Compiler/Disassembler and Tools:
3436 Implemented an ANSI C version of the acpixtract utility. This version will
3437 automatically extract the DSDT and all SSDTs from the input acpidump text
3438 file and dump the binary output to separate files. It can also display a
3439 summary of the input file including the headers for each table found and
3440 will extract any single ACPI table, with any signature. (See
3441 source/tools/acpixtract)
3443 ----------------------------------------
3444 10 March 2006. Summary of changes for version 20060310:
3446 1) ACPI CA Core Subsystem:
3448 Tagged all external interfaces to the subsystem with the new
3449 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
3450 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
3451 macro. The default definition is NULL.
3453 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
3454 This allows the host to define this as necessary to simplify kernel
3455 integration. The default definition is ACPI_NATIVE_UINT.
3457 Fixed two interpreter problems related to error processing, the deletion of
3458 objects, and placing invalid pointers onto the internal operator result
3459 stack. BZ 6028, 6151 (Valery Podrezov)
3461 Increased the reference count threshold where a warning is emitted for large
3462 reference counts in order to eliminate unnecessary warnings on systems with
3463 large namespaces (especially 64-bit.) Increased the value from 0x400 to
3466 Due to universal disagreement as to the meaning of the 'c' in the calloc()
3467 function, the ACPI_MEM_CALLOCATE macro has been renamed to
3468 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
3469 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
3472 Code and Data Size: These are the sizes for the acpica.lib produced by the
3473 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3474 driver or OSPM code. The debug version of the code includes the debug output
3475 trace mechanism and has a much larger code and data size. Note that these
3476 values will vary depending on the efficiency of the compiler and the
3477 compiler options used during generation.
3480 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
3481 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
3483 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3484 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
3487 2) iASL Compiler/Disassembler:
3489 Disassembler: implemented support for symbolic resource descriptor
3490 references. If a CreateXxxxField operator references a fixed offset within a
3491 resource descriptor, a name is assigned to the descriptor and the offset is
3492 translated to the appropriate resource tag and pathname. The addition of
3493 this support brings the disassembled code very close to the original ASL
3494 source code and helps eliminate run-time errors when the disassembled code
3495 is modified (and recompiled) in such a way as to invalidate the original
3498 Implemented support for a Descriptor Name as the last parameter to the ASL
3499 Register() macro. This parameter was inadvertently left out of the ACPI
3500 specification, and will be added for ACPI 3.0b.
3502 Fixed a problem where the use of the "_OSI" string (versus the full path
3503 "\_OSI") caused an internal compiler error. ("No back ptr to op")
3505 Fixed a problem with the error message that occurs when an invalid string is
3506 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
3507 The correct message is now displayed.
3509 ----------------------------------------
3510 17 February 2006. Summary of changes for version 20060217:
3512 1) ACPI CA Core Subsystem:
3514 Implemented a change to the IndexField support to match the behavior of the
3515 Microsoft AML interpreter. The value written to the Index register is now a
3516 byte offset, no longer an index based upon the width of the Data register.
3517 This should fix IndexField problems seen on some machines where the Data
3518 register is not exactly one byte wide. The ACPI specification will be
3519 clarified on this point.
3521 Fixed a problem where several resource descriptor types could overrun the
3522 internal descriptor buffer due to size miscalculation: VendorShort,
3523 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
3524 affect all platforms.
3526 Fixed a problem where individual resource descriptors were misaligned within
3527 the internal buffer, causing alignment faults on IA64 platforms.
3529 Code and Data Size: These are the sizes for the acpica.lib produced by the
3530 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3531 driver or OSPM code. The debug version of the code includes the debug output
3532 trace mechanism and has a much larger code and data size. Note that these
3533 values will vary depending on the efficiency of the compiler and the
3534 compiler options used during generation.
3537 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3538 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3540 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
3541 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
3544 2) iASL Compiler/Disassembler:
3546 Implemented support for new reserved names: _WDG and _WED are Microsoft
3547 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
3548 defined method (Throttling Depth Limit.)
3550 Fixed a problem where a zero-length VendorShort or VendorLong resource
3551 descriptor was incorrectly emitted as a descriptor of length one.
3553 ----------------------------------------
3554 10 February 2006. Summary of changes for version 20060210:
3556 1) ACPI CA Core Subsystem:
3558 Removed a couple of extraneous ACPI_ERROR messages that appeared during
3559 normal execution. These became apparent after the conversion from
3562 Fixed a problem where the CreateField operator could hang if the BitIndex or
3563 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
3565 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
3566 failed with an exception. This also fixes a couple of related RefOf and
3567 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
3569 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
3570 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
3573 Implemented a memory cleanup at the end of the execution of each iteration
3574 of an AML While() loop, preventing the accumulation of outstanding objects.
3575 (Valery Podrezov, BZ 5427)
3577 Eliminated a chunk of duplicate code in the object resolution code. (Valery
3580 Fixed several warnings during the 64-bit code generation.
3582 The AcpiSrc source code conversion tool now inserts one line of whitespace
3583 after an if() statement that is followed immediately by a comment, improving
3584 readability of the Linux code.
3586 Code and Data Size: The current and previous library sizes for the core
3587 subsystem are shown below. These are the code and data sizes for the
3588 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3589 values do not include any ACPI driver or OSPM code. The debug version of the
3590 code includes the debug output trace mechanism and has a much larger code
3591 and data size. Note that these values will vary depending on the efficiency
3592 of the compiler and the compiler options used during generation.
3595 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3596 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3598 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3599 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3602 2) iASL Compiler/Disassembler:
3604 Fixed a problem with the disassembly of a BankField operator with a complex
3605 expression for the BankValue parameter.
3607 ----------------------------------------
3608 27 January 2006. Summary of changes for version 20060127:
3610 1) ACPI CA Core Subsystem:
3612 Implemented support in the Resource Manager to allow unresolved namestring
3613 references within resource package objects for the _PRT method. This support
3614 is in addition to the previously implemented unresolved reference support
3615 within the AML parser. If the interpreter slack mode is enabled, these
3616 unresolved references will be passed through to the caller as a NULL package
3619 Implemented and deployed new macros and functions for error and warning
3620 messages across the subsystem. These macros are simpler and generate less
3621 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
3622 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
3623 macros remain defined to allow ACPI drivers time to migrate to the new
3626 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
3627 Acquire/Release Lock OSL interfaces.
3629 Fixed a problem where Alias ASL operators are sometimes not correctly
3630 resolved, in both the interpreter and the iASL compiler.
3632 Fixed several problems with the implementation of the ConcatenateResTemplate
3633 ASL operator. As per the ACPI specification, zero length buffers are now
3634 treated as a single EndTag. One-length buffers always cause a fatal
3635 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
3636 cause a fatal exception.
3638 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
3639 interface. (With assistance from Thomas Renninger)
3641 Code and Data Size: The current and previous library sizes for the core
3642 subsystem are shown below. These are the code and data sizes for the
3643 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3644 values do not include any ACPI driver or OSPM code. The debug version of the
3645 code includes the debug output trace mechanism and has a much larger code
3646 and data size. Note that these values will vary depending on the efficiency
3647 of the compiler and the compiler options used during generation.
3650 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3651 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3653 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3654 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3657 2) iASL Compiler/Disassembler:
3659 Fixed an internal error that was generated for any forward references to ASL
3662 ----------------------------------------
3663 13 January 2006. Summary of changes for version 20060113:
3665 1) ACPI CA Core Subsystem:
3667 Added 2006 copyright to all module headers and signons. This affects
3668 virtually every file in the ACPICA core subsystem, iASL compiler, and the
3671 Enhanced the ACPICA error reporting in order to simplify user migration to
3672 the non-debug version of ACPICA. Replaced all instances of the
3673 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
3674 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
3675 respectively. This preserves all error and warning messages in the non-debug
3676 version of the ACPICA code (this has been referred to as the "debug lite"
3677 option.) Over 200 cases were converted to create a total of over 380
3678 error/warning messages across the ACPICA code. This increases the code and
3679 data size of the default non-debug version of the code somewhat (about 13K),
3680 but all error/warning reporting may be disabled if desired (and code
3681 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
3682 configuration option. The size of the debug version of ACPICA remains about
3685 Fixed a memory leak within the AML Debugger "Set" command. One object was
3686 not properly deleted for every successful invocation of the command.
3688 Code and Data Size: The current and previous library sizes for the core
3689 subsystem are shown below. These are the code and data sizes for the
3690 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3691 values do not include any ACPI driver or OSPM code. The debug version of the
3692 code includes the debug output trace mechanism and has a much larger code
3693 and data size. Note that these values will vary depending on the efficiency
3694 of the compiler and the compiler options used during generation.
3697 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3698 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3700 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3701 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3704 2) iASL Compiler/Disassembler:
3706 The compiler now officially supports the ACPI 3.0a specification that was
3707 released on December 30, 2005. (Specification is available at www.acpi.info)
3709 ----------------------------------------
3710 16 December 2005. Summary of changes for version 20051216:
3712 1) ACPI CA Core Subsystem:
3714 Implemented optional support to allow unresolved names within ASL Package
3715 objects. A null object is inserted in the package when a named reference
3716 cannot be located in the current namespace. Enabled via the interpreter
3717 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
3718 that contain such code.
3720 Implemented an optimization to the initialization sequence that can improve
3721 boot time. During ACPI device initialization, the _STA method is now run if
3722 and only if the _INI method exists. The _STA method is used to determine if
3723 the device is present; An _INI can only be run if _STA returns present, but
3724 it is a waste of time to run the _STA method if the _INI does not exist.
3725 (Prototype and assistance from Dong Wei)
3727 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
3728 available in the current compiler. Otherwise, the default (void *) cast is
3731 Fixed some possible memory leaks found within the execution path of the
3732 Break, Continue, If, and CreateField operators. (Valery Podrezov)
3734 Fixed a problem introduced in the 20051202 release where an exception is
3735 generated during method execution if a control method attempts to declare
3738 Moved resource descriptor string constants that are used by both the AML
3739 disassembler and AML debugger to the common utilities directory so that
3740 these components are independent.
3742 Implemented support in the AcpiExec utility (-e switch) to globally ignore
3743 exceptions during control method execution (method is not aborted.)
3745 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
3748 Code and Data Size: The current and previous library sizes for the core
3749 subsystem are shown below. These are the code and data sizes for the
3750 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3751 values do not include any ACPI driver or OSPM code. The debug version of the
3752 code includes the debug output trace mechanism and has a much larger code
3753 and data size. Note that these values will vary depending on the efficiency
3754 of the compiler and the compiler options used during generation.
3757 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3758 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3760 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3761 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3764 2) iASL Compiler/Disassembler:
3766 Fixed a problem where a CPU stack overflow fault could occur if a recursive
3767 method call was made from within a Return statement.
3769 ----------------------------------------
3770 02 December 2005. Summary of changes for version 20051202:
3772 1) ACPI CA Core Subsystem:
3774 Modified the parsing of control methods to no longer create namespace
3775 objects during the first pass of the parse. Objects are now created only
3776 during the execute phase, at the moment the namespace creation operator is
3777 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
3778 should eliminate ALREADY_EXISTS exceptions seen on some machines where
3779 reentrant control methods are protected by an AML mutex. The mutex will now
3780 correctly block multiple threads from attempting to create the same object
3783 Increased the number of available Owner Ids for namespace object tracking
3784 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
3785 some machines with a large number of ACPI tables (either static or dynamic).
3787 Fixed a problem with the AcpiExec utility where a fault could occur when the
3788 -b switch (batch mode) is used.
3790 Enhanced the namespace dump routine to output the owner ID for each
3793 Code and Data Size: The current and previous library sizes for the core
3794 subsystem are shown below. These are the code and data sizes for the
3795 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3796 values do not include any ACPI driver or OSPM code. The debug version of the
3797 code includes the debug output trace mechanism and has a much larger code
3798 and data size. Note that these values will vary depending on the efficiency
3799 of the compiler and the compiler options used during generation.
3802 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3803 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3805 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3806 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3809 2) iASL Compiler/Disassembler:
3811 Fixed a parse error during compilation of certain Switch/Case constructs. To
3812 simplify the parse, the grammar now allows for multiple Default statements
3813 and this error is now detected and flagged during the analysis phase.
3815 Disassembler: The disassembly now includes the contents of the original
3816 table header within a comment at the start of the file. This includes the
3817 name and version of the original ASL compiler.
3819 ----------------------------------------
3820 17 November 2005. Summary of changes for version 20051117:
3822 1) ACPI CA Core Subsystem:
3824 Fixed a problem in the AML parser where the method thread count could be
3825 decremented below zero if any errors occurred during the method parse phase.
3826 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
3827 This also fixed a related regression with the mechanism that detects and
3828 corrects methods that cannot properly handle reentrancy (related to the
3829 deployment of the new OwnerId mechanism.)
3831 Eliminated the pre-parsing of control methods (to detect errors) during
3832 table load. Related to the problem above, this was causing unwind issues if
3833 any errors occurred during the parse, and it seemed to be overkill. A table
3834 load should not be aborted if there are problems with any single control
3835 method, thus rendering this feature rather pointless.
3837 Fixed a problem with the new table-driven resource manager where an internal
3838 buffer overflow could occur for small resource templates.
3840 Implemented a new external interface, AcpiGetVendorResource. This interface
3841 will find and return a vendor-defined resource descriptor within a _CRS or
3842 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
3844 Removed the length limit (200) on string objects as per the upcoming ACPI
3845 3.0A specification. This affects the following areas of the interpreter: 1)
3846 any implicit conversion of a Buffer to a String, 2) a String object result
3847 of the ASL Concatentate operator, 3) the String object result of the ASL
3850 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
3851 on a semaphore object would incorrectly timeout. This allows the
3852 multithreading features of the AcpiExec utility to work properly under
3855 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
3856 the recently added file named "utresrc.c".
3858 Code and Data Size: The current and previous library sizes for the core
3859 subsystem are shown below. These are the code and data sizes for the
3860 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3861 values do not include any ACPI driver or OSPM code. The debug version of the
3862 code includes the debug output trace mechanism and has a much larger code
3863 and data size. Note that these values will vary depending on the efficiency
3864 of the compiler and the compiler options used during generation.
3867 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3868 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3870 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3871 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3874 2) iASL Compiler/Disassembler:
3876 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
3877 specification. For the iASL compiler, this means that string literals within
3878 the source ASL can be of any length.
3880 Enhanced the listing output to dump the AML code for resource descriptors
3881 immediately after the ASL code for each descriptor, instead of in a block at
3882 the end of the entire resource template.
3884 Enhanced the compiler debug output to dump the entire original parse tree
3885 constructed during the parse phase, before any transforms are applied to the
3886 tree. The transformed tree is dumped also.
3888 ----------------------------------------
3889 02 November 2005. Summary of changes for version 20051102:
3891 1) ACPI CA Core Subsystem:
3893 Modified the subsystem initialization sequence to improve GPE support. The
3894 GPE initialization has been split into two parts in order to defer execution
3895 of the _PRW methods (Power Resources for Wake) until after the hardware is
3896 fully initialized and the SCI handler is installed. This allows the _PRW
3897 methods to access fields protected by the Global Lock. This will fix systems
3898 where a NO_GLOBAL_LOCK exception has been seen during initialization.
3900 Converted the ACPI internal object disassemble and display code within the
3901 AML debugger to fully table-driven operation, reducing code size and
3902 increasing maintainability.
3904 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
3905 in the 20051021 release.
3907 Implemented support for "local" internal ACPI object types within the
3908 debugger "Object" command and the AcpiWalkNamespace external interfaces.
3909 These local types include RegionFields, BankFields, IndexFields, Alias, and
3912 Moved common AML resource handling code into a new file, "utresrc.c". This
3913 code is shared by both the Resource Manager and the AML Debugger.
3915 Code and Data Size: The current and previous library sizes for the core
3916 subsystem are shown below. These are the code and data sizes for the
3917 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3918 values do not include any ACPI driver or OSPM code. The debug version of the
3919 code includes the debug output trace mechanism and has a much larger code
3920 and data size. Note that these values will vary depending on the efficiency
3921 of the compiler and the compiler options used during generation.
3924 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3925 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3927 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3928 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3931 2) iASL Compiler/Disassembler:
3933 Fixed a problem with very large initializer lists (more than 4000 elements)
3934 for both Buffer and Package objects where the parse stack could overflow.
3936 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
3937 characters within comment fields. The scan is now always performed and is no
3938 longer optional, detecting invalid characters within a source file
3939 immediately rather than during the parse phase or later.
3941 Enhanced the ASL grammar definition to force early reductions on all list-
3942 style grammar elements so that the overall parse stack usage is greatly
3943 reduced. This should improve performance and reduce the possibility of parse
3946 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
3947 with the addition of a %expected statement, the compiler generates from
3948 source with no warnings.
3950 Fixed a possible segment fault in the disassembler if the input filename
3951 does not contain a "dot" extension (Thomas Renninger).
3953 ----------------------------------------
3954 21 October 2005. Summary of changes for version 20051021:
3956 1) ACPI CA Core Subsystem:
3958 Implemented support for the EM64T and other x86-64 processors. This
3959 essentially entails recognizing that these processors support non-aligned
3960 memory transfers. Previously, all 64-bit processors were assumed to lack
3961 hardware support for non-aligned transfers.
3963 Completed conversion of the Resource Manager to nearly full table-driven
3964 operation. Specifically, the resource conversion code (convert AML to
3965 internal format and the reverse) and the debug code to dump internal
3966 resource descriptors are fully table-driven, reducing code and data size and
3967 improving maintainability.
3969 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
3970 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
3971 Alexey Starikovskiy)
3973 Implemented support within the resource conversion code for the Type-
3974 Specific byte within the various ACPI 3.0 *WordSpace macros.
3976 Fixed some issues within the resource conversion code for the type-specific
3977 flags for both Memory and I/O address resource descriptors. For Memory,
3978 implemented support for the MTP and TTP flags. For I/O, split the TRS and
3979 TTP flags into two separate fields.
3981 Code and Data Size: The current and previous library sizes for the core
3982 subsystem are shown below. These are the code and data sizes for the
3983 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3984 values do not include any ACPI driver or OSPM code. The debug version of the
3985 code includes the debug output trace mechanism and has a much larger code
3986 and data size. Note that these values will vary depending on the efficiency
3987 of the compiler and the compiler options used during generation.
3990 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3991 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3993 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3994 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3998 2) iASL Compiler/Disassembler:
4000 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
4001 corresponding ResourceSource string was not also present in a resource
4002 descriptor declaration. This restriction caused problems with existing
4003 AML/ASL code that includes the Index byte without the string. When such AML
4004 was disassembled, it could not be compiled without modification. Further,
4005 the modified code created a resource template with a different size than the
4006 original, breaking code that used fixed offsets into the resource template
4009 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
4010 byte. This byte is now emitted if present so that the exact AML can be
4011 reproduced when the disassembled code is recompiled.
4013 Improved comments and text alignment for the resource descriptor code
4014 emitted by the disassembler.
4016 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
4017 Register() resource descriptor.
4019 ----------------------------------------
4020 30 September 2005. Summary of changes for version 20050930:
4022 1) ACPI CA Core Subsystem:
4024 Completed a major overhaul of the Resource Manager code - specifically,
4025 optimizations in the area of the AML/internal resource conversion code. The
4026 code has been optimized to simplify and eliminate duplicated code, CPU stack
4027 use has been decreased by optimizing function parameters and local
4028 variables, and naming conventions across the manager have been standardized
4029 for clarity and ease of maintenance (this includes function, parameter,
4030 variable, and struct/typedef names.) The update may force changes in some
4031 driver code, depending on how resources are handled by the host OS.
4033 All Resource Manager dispatch and information tables have been moved to a
4034 single location for clarity and ease of maintenance. One new file was
4035 created, named "rsinfo.c".
4037 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
4038 guarantee that the argument is not evaluated twice, making them less prone
4039 to macro side-effects. However, since there exists the possibility of
4040 additional stack use if a particular compiler cannot optimize them (such as
4041 in the debug generation case), the original macros are optionally available.
4042 Note that some invocations of the return_VALUE macro may now cause size
4043 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
4044 eliminate these. (From Randy Dunlap)
4046 Implemented a new mechanism to enable debug tracing for individual control
4047 methods. A new external interface, AcpiDebugTrace, is provided to enable
4048 this mechanism. The intent is to allow the host OS to easily enable and
4049 disable tracing for problematic control methods. This interface can be
4050 easily exposed to a user or debugger interface if desired. See the file
4051 psxface.c for details.
4053 AcpiUtCallocate will now return a valid pointer if a length of zero is
4054 specified - a length of one is used and a warning is issued. This matches
4055 the behavior of AcpiUtAllocate.
4057 Code and Data Size: The current and previous library sizes for the core
4058 subsystem are shown below. These are the code and data sizes for the
4059 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4060 values do not include any ACPI driver or OSPM code. The debug version of the
4061 code includes the debug output trace mechanism and has a much larger code
4062 and data size. Note that these values will vary depending on the efficiency
4063 of the compiler and the compiler options used during generation.
4066 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
4067 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
4069 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
4070 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
4073 2) iASL Compiler/Disassembler:
4075 A remark is issued if the effective compile-time length of a package or
4076 buffer is zero. Previously, this was a warning.
4078 ----------------------------------------
4079 16 September 2005. Summary of changes for version 20050916:
4081 1) ACPI CA Core Subsystem:
4083 Fixed a problem within the Resource Manager where support for the Generic
4084 Register descriptor was not fully implemented. This descriptor is now fully
4085 recognized, parsed, disassembled, and displayed.
4087 Completely restructured the Resource Manager code to utilize table-driven
4088 dispatch and lookup, eliminating many of the large switch() statements. This
4089 reduces overall subsystem code size and code complexity. Affects the
4090 resource parsing and construction, disassembly, and debug dump output.
4092 Cleaned up and restructured the debug dump output for all resource
4093 descriptors. Improved readability of the output and reduced code size.
4095 Fixed a problem where changes to internal data structures caused the
4096 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
4098 Code and Data Size: The current and previous library sizes for the core
4099 subsystem are shown below. These are the code and data sizes for the
4100 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4101 values do not include any ACPI driver or OSPM code. The debug version of the
4102 code includes the debug output trace mechanism and has a much larger code
4103 and data size. Note that these values will vary depending on the efficiency
4104 of the compiler and the compiler options used during generation.
4107 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
4108 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
4110 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
4111 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
4114 2) iASL Compiler/Disassembler:
4116 Updated the disassembler to automatically insert an EndDependentFn() macro
4117 into the ASL stream if this macro is missing in the original AML code,
4118 simplifying compilation of the resulting ASL module.
4120 Fixed a problem in the disassembler where a disassembled ResourceSource
4121 string (within a large resource descriptor) was not surrounded by quotes and
4122 not followed by a comma, causing errors when the resulting ASL module was
4123 compiled. Also, escape sequences within a ResourceSource string are now
4124 handled correctly (especially "\\")
4126 ----------------------------------------
4127 02 September 2005. Summary of changes for version 20050902:
4129 1) ACPI CA Core Subsystem:
4131 Fixed a problem with the internal Owner ID allocation and deallocation
4132 mechanisms for control method execution and recursive method invocation.
4133 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
4134 messages seen on some systems. Recursive method invocation depth is
4135 currently limited to 255. (Alexey Starikovskiy)
4137 Completely eliminated all vestiges of support for the "module-level
4138 executable code" until this support is fully implemented and debugged. This
4139 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
4140 some systems that invoke this support.
4142 Fixed a problem within the resource manager code where the transaction flags
4143 for a 64-bit address descriptor were handled incorrectly in the type-
4146 Consolidated duplicate code within the address descriptor resource manager
4147 code, reducing overall subsystem code size.
4149 Fixed a fault when using the AML debugger "disassemble" command to
4150 disassemble individual control methods.
4152 Removed references to the "release_current" directory within the Unix
4155 Code and Data Size: The current and previous core subsystem library sizes
4156 are shown below. These are the code and data sizes for the acpica.lib
4157 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
4158 include any ACPI driver or OSPM code. The debug version of the code includes
4159 the debug output trace mechanism and has a much larger code and data size.
4160 Note that these values will vary depending on the efficiency of the compiler
4161 and the compiler options used during generation.
4164 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4165 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
4167 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
4168 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
4171 2) iASL Compiler/Disassembler:
4173 Implemented an error check for illegal duplicate values in the interrupt and
4174 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
4177 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
4178 too many values in the interrupt list (16 max) and invalid values in the
4181 The maximum length string literal within an ASL file is now restricted to
4182 200 characters as per the ACPI specification.
4184 Fixed a fault when using the -ln option (generate namespace listing).
4186 Implemented an error check to determine if a DescriptorName within a
4187 resource descriptor has already been used within the current scope.
4189 ----------------------------------------
4190 15 August 2005. Summary of changes for version 20050815:
4192 1) ACPI CA Core Subsystem:
4194 Implemented a full bytewise compare to determine if a table load request is
4195 attempting to load a duplicate table. The compare is performed if the table
4196 signatures and table lengths match. This will allow different tables with
4197 the same OEM Table ID and revision to be loaded - probably against the ACPI
4198 specification, but discovered in the field nonetheless.
4200 Added the changes.txt logfile to each of the zipped release packages.
4202 Code and Data Size: Current and previous core subsystem library sizes are
4203 shown below. These are the code and data sizes for the acpica.lib produced
4204 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4205 any ACPI driver or OSPM code. The debug version of the code includes the
4206 debug output trace mechanism and has a much larger code and data size. Note
4207 that these values will vary depending on the efficiency of the compiler and
4208 the compiler options used during generation.
4211 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4212 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
4214 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4215 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
4218 2) iASL Compiler/Disassembler:
4220 Fixed a problem where incorrect AML code could be generated for Package
4221 objects if optimization is disabled (via the -oa switch).
4223 Fixed a problem with where incorrect AML code is generated for variable-
4224 length packages when the package length is not specified and the number of
4225 initializer values is greater than 255.
4228 ----------------------------------------
4229 29 July 2005. Summary of changes for version 20050729:
4231 1) ACPI CA Core Subsystem:
4233 Implemented support to ignore an attempt to install/load a particular ACPI
4234 table more than once. Apparently there exists BIOS code that repeatedly
4235 attempts to load the same SSDT upon certain events. With assistance from
4236 Venkatesh Pallipadi.
4238 Restructured the main interface to the AML parser in order to correctly
4239 handle all exceptional conditions. This will prevent leakage of the OwnerId
4240 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
4241 machines. With assistance from Alexey Starikovskiy.
4243 Support for "module level code" has been disabled in this version due to a
4244 number of issues that have appeared on various machines. The support can be
4245 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
4246 compilation. When the issues are fully resolved, the code will be enabled by
4249 Modified the internal functions for debug print support to define the
4250 FunctionName parameter as a (const char *) for compatibility with compiler
4251 built-in macros such as __FUNCTION__, etc.
4253 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
4255 Implemented support to display an object count summary for the AML Debugger
4256 commands Object and Methods.
4258 Code and Data Size: Current and previous core subsystem library sizes are
4259 shown below. These are the code and data sizes for the acpica.lib produced
4260 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4261 any ACPI driver or OSPM code. The debug version of the code includes the
4262 debug output trace mechanism and has a much larger code and data size. Note
4263 that these values will vary depending on the efficiency of the compiler and
4264 the compiler options used during generation.
4267 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
4268 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
4270 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4271 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
4274 2) iASL Compiler/Disassembler:
4276 Fixed a regression that appeared in the 20050708 version of the compiler
4277 where an error message was inadvertently emitted for invocations of the _OSI
4278 reserved control method.
4280 ----------------------------------------
4281 08 July 2005. Summary of changes for version 20050708:
4283 1) ACPI CA Core Subsystem:
4285 The use of the CPU stack in the debug version of the subsystem has been
4286 considerably reduced. Previously, a debug structure was declared in every
4287 function that used the debug macros. This structure has been removed in
4288 favor of declaring the individual elements as parameters to the debug
4289 functions. This reduces the cumulative stack use during nested execution of
4290 ACPI function calls at the cost of a small increase in the code size of the
4291 debug version of the subsystem. With assistance from Alexey Starikovskiy and
4294 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
4295 headers to define a macro that will return the current function name at
4296 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
4297 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
4298 compiler-dependent header, the function name is saved on the CPU stack (one
4299 pointer per function.) This mechanism is used because apparently there
4300 exists no standard ANSI-C defined macro that that returns the function name.
4302 Redesigned and reimplemented the "Owner ID" mechanism used to track
4303 namespace objects created/deleted by ACPI tables and control method
4304 execution. A bitmap is now used to allocate and free the IDs, thus solving
4305 the wraparound problem present in the previous implementation. The size of
4306 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
4309 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
4310 flag definitions within the headers for the predefined ACPI tables. These
4311 have been replaced by UINT8_BIT in order to increase the code portability of
4312 the subsystem. If the use of UINT8 remains a problem, we may be forced to
4313 eliminate bitfields entirely because of a lack of portability.
4315 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
4316 is a frequently used function and this improvement increases the performance
4317 of the entire subsystem (Alexey Starikovskiy).
4319 Fixed several possible memory leaks and the inverse - premature object
4320 deletion (Alexey Starikovskiy).
4322 Code and Data Size: Current and previous core subsystem library sizes are
4323 shown below. These are the code and data sizes for the acpica.lib produced
4324 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4325 any ACPI driver or OSPM code. The debug version of the code includes the
4326 debug output trace mechanism and has a much larger code and data size. Note
4327 that these values will vary depending on the efficiency of the compiler and
4328 the compiler options used during generation.
4331 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
4332 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
4334 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
4335 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
4337 ----------------------------------------
4338 24 June 2005. Summary of changes for version 20050624:
4340 1) ACPI CA Core Subsystem:
4342 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
4343 the host-defined cache object. This allows the OSL implementation to define
4344 and type this object in any manner desired, simplifying the OSL
4345 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
4346 Linux, and should be defined in the OS-specific header file for other
4347 operating systems as required.
4349 Changed the interface to AcpiOsAcquireObject to directly return the
4350 requested object as the function return (instead of ACPI_STATUS.) This
4351 change was made for performance reasons, since this is the purpose of the
4352 interface in the first place. AcpiOsAcquireObject is now similar to the
4353 AcpiOsAllocate interface.
4355 Implemented a new AML debugger command named Businfo. This command displays
4356 information about all devices that have an associate _PRT object. The _ADR,
4357 _HID, _UID, and _CID are displayed for these devices.
4359 Modified the initialization sequence in AcpiInitializeSubsystem to call the
4360 OSL interface AcpiOslInitialize first, before any local initialization. This
4361 change was required because the global initialization now calls OSL
4364 Enhanced the Dump command to display the entire contents of Package objects
4365 (including all sub-objects and their values.)
4367 Restructured the code base to split some files because of size and/or
4368 because the code logically belonged in a separate file. New files are listed
4369 below. All makefiles and project files included in the ACPI CA release have
4371 utilities/utcache.c /* Local cache interfaces */
4372 utilities/utmutex.c /* Local mutex support */
4373 utilities/utstate.c /* State object support */
4374 interpreter/parser/psloop.c /* Main AML parse loop */
4376 Code and Data Size: Current and previous core subsystem library sizes are
4377 shown below. These are the code and data sizes for the acpica.lib produced
4378 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4379 any ACPI driver or OSPM code. The debug version of the code includes the
4380 debug output trace mechanism and has a much larger code and data size. Note
4381 that these values will vary depending on the efficiency of the compiler and
4382 the compiler options used during generation.
4385 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
4386 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
4388 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
4389 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
4392 2) iASL Compiler/Disassembler:
4394 Fixed a regression introduced in version 20050513 where the use of a Package
4395 object within a Case() statement caused a compile time exception. The
4396 original behavior has been restored (a Match() operator is emitted.)
4398 ----------------------------------------
4399 17 June 2005. Summary of changes for version 20050617:
4401 1) ACPI CA Core Subsystem:
4403 Moved the object cache operations into the OS interface layer (OSL) to allow
4404 the host OS to handle these operations if desired (for example, the Linux
4405 OSL will invoke the slab allocator). This support is optional; the compile
4406 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
4407 code in the ACPI CA core. The new OSL interfaces are shown below. See
4408 utalloc.c for an example implementation, and acpiosxf.h for the exact
4409 interface definitions. With assistance from Alexey Starikovskiy.
4416 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
4417 and restore a flags parameter. This fits better with many OS lock models.
4418 Note: the current execution state (interrupt handler or not) is no longer
4419 passed to these interfaces. If necessary, the OSL must determine this state
4420 by itself, a simple and fast operation. With assistance from Alexey
4423 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
4424 present if the revision of the RSDP was 2 or greater. According to the ACPI
4425 specification, the XSDT is optional in all cases, and the table manager
4426 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
4427 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
4430 Fixed an interpreter problem with the Mid() operator in the case of an input
4431 string where the resulting output string is of zero length. It now correctly
4432 returns a valid, null terminated string object instead of a string object
4433 with a null pointer.
4435 Fixed a problem with the control method argument handling to allow a store
4436 to an Arg object that already contains an object of type Device. The Device
4437 object is now correctly overwritten. Previously, an error was returned.
4440 Enhanced the debugger Find command to emit object values in addition to the
4441 found object pathnames. The output format is the same as the dump namespace
4444 Enhanced the debugger Set command. It now has the ability to set the value
4445 of any Named integer object in the namespace (Previously, only method locals
4446 and args could be set.)
4448 Code and Data Size: Current and previous core subsystem library sizes are
4449 shown below. These are the code and data sizes for the acpica.lib produced
4450 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4451 any ACPI driver or OSPM code. The debug version of the code includes the
4452 debug output trace mechanism and has a much larger code and data size. Note
4453 that these values will vary depending on the efficiency of the compiler and
4454 the compiler options used during generation.
4457 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
4458 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
4460 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
4461 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
4464 2) iASL Compiler/Disassembler:
4466 Fixed a regression in the disassembler where if/else/while constructs were
4467 output incorrectly. This problem was introduced in the previous release
4468 (20050526). This problem also affected the single-step disassembly in the
4471 Fixed a problem where compiling the reserved _OSI method would randomly (but
4472 rarely) produce compile errors.
4474 Enhanced the disassembler to emit compilable code in the face of incorrect
4475 AML resource descriptors. If the optional ResourceSourceIndex is present,
4476 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
4477 disassembly. Otherwise, the resulting code cannot be compiled without
4480 ----------------------------------------
4481 26 May 2005. Summary of changes for version 20050526:
4483 1) ACPI CA Core Subsystem:
4485 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
4486 the module level (not within a control method.) These opcodes are executed
4487 exactly once at the time the table is loaded. This type of code was legal up
4488 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
4489 order to provide backwards compatibility with earlier BIOS implementations.
4490 This eliminates the "Encountered executable code at module level" warning
4491 that was previously generated upon detection of such code.
4493 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
4494 inadvertently be generated during the lookup of namespace objects in the
4495 second pass parse of ACPI tables and control methods. It appears that this
4496 problem could occur during the resolution of forward references to namespace
4499 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
4500 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
4501 allows the deadlock detection debug code to be compiled out in the normal
4502 case, improving mutex performance (and overall subsystem performance)
4505 Implemented a handful of miscellaneous fixes for possible memory leaks on
4506 error conditions and error handling control paths. These fixes were
4507 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
4509 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
4510 to prevent a fault in this error case.
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: 78.2K Code, 11.6K Data, 89.8K Total
4522 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4524 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
4525 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
4528 2) iASL Compiler/Disassembler:
4530 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
4531 the module level (not within a control method.) These operators will be
4532 executed once at the time the table is loaded. This type of code was legal
4533 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
4534 compiler in order to provide backwards compatibility with earlier BIOS ASL
4537 The ACPI integer width (specified via the table revision ID or the -r
4538 override, 32 or 64 bits) is now used internally during compile-time constant
4539 folding to ensure that constants are truncated to 32 bits if necessary.
4540 Previously, the revision ID value was only emitted in the AML table header.
4542 An error message is now generated for the Mutex and Method operators if the
4543 SyncLevel parameter is outside the legal range of 0 through 15.
4545 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
4546 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
4547 The actual underlying implementation of method argument typechecking is
4548 still under development, however.
4550 ----------------------------------------
4551 13 May 2005. Summary of changes for version 20050513:
4553 1) ACPI CA Core Subsystem:
4555 Implemented support for PCI Express root bridges -- added support for device
4556 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
4558 The interpreter now automatically truncates incoming 64-bit constants to 32
4559 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
4560 also affects the iASL compiler constant folding. (Note: as per below, the
4561 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
4563 Fixed a problem where string and buffer objects with "static" pointers
4564 (pointers to initialization data within an ACPI table) were not handled
4565 consistently. The internal object copy operation now always copies the data
4566 to a newly allocated buffer, regardless of whether the source object is
4569 Fixed a problem with the FromBCD operator where an implicit result
4570 conversion was improperly performed while storing the result to the target
4571 operand. Since this is an "explicit conversion" operator, the implicit
4572 conversion should never be performed on the output.
4574 Fixed a problem with the CopyObject operator where a copy to an existing
4575 named object did not always completely overwrite the existing object stored
4576 at name. Specifically, a buffer-to-buffer copy did not delete the existing
4579 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
4580 structs for consistency.
4582 Code and Data Size: Current and previous core subsystem library sizes are
4583 shown below. These are the code and data sizes for the acpica.lib produced
4584 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4585 any ACPI driver or OSPM code. The debug version of the code includes the
4586 debug output trace mechanism and has a much larger code and data size. Note
4587 that these values will vary depending on the efficiency of the compiler and
4588 the compiler options used during generation.
4591 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4592 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4593 Current Release: (Same sizes)
4594 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4595 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4598 2) iASL Compiler/Disassembler:
4600 The compiler now emits a warning if an attempt is made to generate a 64-bit
4601 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
4602 is truncated to 32 bits.
4604 Fixed a problem with large package objects: if the static length of the
4605 package is greater than 255, the "variable length package" opcode is
4606 emitted. Previously, this caused an error. This requires an update to the
4607 ACPI spec, since it currently (incorrectly) states that packages larger than
4608 255 elements are not allowed.
4610 The disassembler now correctly handles variable length packages and packages
4611 larger than 255 elements.
4613 ----------------------------------------
4614 08 April 2005. Summary of changes for version 20050408:
4616 1) ACPI CA Core Subsystem:
4618 Fixed three cases in the interpreter where an "index" argument to an ASL
4619 function was still (internally) 32 bits instead of the required 64 bits.
4620 This was the Index argument to the Index, Mid, and Match operators.
4622 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
4623 not a POSIX-defined function and not present in most kernel-level C
4624 libraries. All references to the C library strupr function have been removed
4627 Completed the deployment of static functions/prototypes. All prototypes with
4628 the static attribute have been moved from the headers to the owning C file.
4630 Implemented an extract option (-e) for the AcpiBin utility (AML binary
4631 utility). This option allows the utility to extract individual ACPI tables
4632 from the output of AcpiDmp. It provides the same functionality of the
4633 acpixtract.pl perl script without the worry of setting the correct perl
4634 options. AcpiBin runs on Windows and has not yet been generated/validated in
4635 the Linux/Unix environment (but should be soon).
4637 Updated and fixed the table dump option for AcpiBin (-d). This option
4638 converts a single ACPI table to a hex/ascii file, similar to the output of
4641 Code and Data Size: Current and previous core subsystem library sizes are
4642 shown below. These are the code and data sizes for the acpica.lib produced
4643 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4644 any ACPI driver or OSPM code. The debug version of the code includes the
4645 debug output trace mechanism and has a much larger code and data size. Note
4646 that these values will vary depending on the efficiency of the compiler and
4647 the compiler options used during generation.
4650 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4651 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4653 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4654 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4657 2) iASL Compiler/Disassembler:
4659 Disassembler fix: Added a check to ensure that the table length found in the
4660 ACPI table header within the input file is not longer than the actual input
4661 file size. This indicates some kind of file or table corruption.
4663 ----------------------------------------
4664 29 March 2005. Summary of changes for version 20050329:
4666 1) ACPI CA Core Subsystem:
4668 An error is now generated if an attempt is made to create a Buffer Field of
4669 length zero (A CreateField with a length operand of zero.)
4671 The interpreter now issues a warning whenever executable code at the module
4672 level is detected during ACPI table load. This will give some idea of the
4673 prevalence of this type of code.
4675 Implemented support for references to named objects (other than control
4676 methods) within package objects.
4678 Enhanced package object output for the debug object. Package objects are now
4679 completely dumped, showing all elements.
4681 Enhanced miscellaneous object output for the debug object. Any object can
4682 now be written to the debug object (for example, a device object can be
4683 written, and the type of the object will be displayed.)
4685 The "static" qualifier has been added to all local functions across both the
4686 core subsystem and the iASL compiler.
4688 The number of "long" lines (> 80 chars) within the source has been
4689 significantly reduced, by about 1/3.
4691 Cleaned up all header files to ensure that all CA/iASL functions are
4692 prototyped (even static functions) and the formatting is consistent.
4694 Two new header files have been added, acopcode.h and acnames.h.
4696 Removed several obsolete functions that were no longer used.
4698 Code and Data Size: Current and previous core subsystem library sizes are
4699 shown below. These are the code and data sizes for the acpica.lib produced
4700 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4701 any ACPI driver or OSPM code. The debug version of the code includes the
4702 debug output trace mechanism and has a much larger code and data size. Note
4703 that these values will vary depending on the efficiency of the compiler and
4704 the compiler options used during generation.
4707 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4708 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4710 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4711 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4715 2) iASL Compiler/Disassembler:
4717 Fixed a problem with the resource descriptor generation/support. For the
4718 ResourceSourceIndex and the ResourceSource fields, both must be present, or
4719 both must be not present - can't have one without the other.
4721 The compiler now returns non-zero from the main procedure if any errors have
4722 occurred during the compilation.
4725 ----------------------------------------
4726 09 March 2005. Summary of changes for version 20050309:
4728 1) ACPI CA Core Subsystem:
4730 The string-to-buffer implicit conversion code has been modified again after
4731 a change to the ACPI specification. In order to match the behavior of the
4732 other major ACPI implementation, the target buffer is no longer truncated if
4733 the source string is smaller than an existing target buffer. This change
4734 requires an update to the ACPI spec, and should eliminate the recent
4735 AE_AML_BUFFER_LIMIT issues.
4737 The "implicit return" support was rewritten to a new algorithm that solves
4738 the general case. Rather than attempt to determine when a method is about to
4739 exit, the result of every ASL operator is saved momentarily until the very
4740 next ASL operator is executed. Therefore, no matter how the method exits,
4741 there will always be a saved implicit return value. This feature is only
4742 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
4743 AE_AML_NO_RETURN_VALUE errors when enabled.
4745 Implemented implicit conversion support for the predicate (operand) of the
4746 If, Else, and While operators. String and Buffer arguments are automatically
4747 converted to Integers.
4749 Changed the string-to-integer conversion behavior to match the new ACPI
4750 errata: "If no integer object exists, a new integer is created. The ASCII
4751 string is interpreted as a hexadecimal constant. Each string character is
4752 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
4753 with the first character as the most significant digit, and ending with the
4754 first non-hexadecimal character or end-of-string." This means that the first
4755 non-hex character terminates the conversion and this is the code that was
4758 Fixed a problem where the ObjectType operator would fail (fault) when used
4759 on an Index of a Package which pointed to a null package element. The
4760 operator now properly returns zero (Uninitialized) in this case.
4762 Fixed a problem where the While operator used excessive memory by not
4763 properly popping the result stack during execution. There was no memory leak
4764 after execution, however. (Code provided by Valery Podrezov.)
4766 Fixed a problem where references to control methods within Package objects
4767 caused the method to be invoked, instead of producing a reference object
4768 pointing to the method.
4770 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
4771 improve performance and reduce code size. (Code provided by Alexey
4774 Code and Data Size: Current and previous core subsystem library sizes are
4775 shown below. These are the code and data sizes for the acpica.lib produced
4776 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4777 any ACPI driver or OSPM code. The debug version of the code includes the
4778 debug output trace mechanism and has a much larger code and data size. Note
4779 that these values will vary depending on the efficiency of the compiler and
4780 the compiler options used during generation.
4783 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4784 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4786 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4787 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4790 2) iASL Compiler/Disassembler:
4792 Fixed a problem with the Return operator with no arguments. Since the AML
4793 grammar for the byte encoding requires an operand for the Return opcode, the
4794 compiler now emits a Return(Zero) for this case. An ACPI specification
4795 update has been written for this case.
4797 For tables other than the DSDT, namepath optimization is automatically
4798 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
4799 compiler has no knowledge of where, and thus cannot optimize namepaths.
4801 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
4802 inadvertently omitted from the ACPI specification, and will require an
4805 The source file scan for ASCII characters is now optional (-a). This change
4806 was made because some vendors place non-ascii characters within comments.
4807 However, the scan is simply a brute-force byte compare to ensure all
4808 characters in the file are in the range 0x00 to 0x7F.
4810 Fixed a problem with the CondRefOf operator where the compiler was
4811 inappropriately checking for the existence of the target. Since the point of
4812 the operator is to check for the existence of the target at run-time, the
4813 compiler no longer checks for the target existence.
4815 Fixed a problem where errors generated from the internal AML interpreter
4816 during constant folding were not handled properly, causing a fault.
4818 Fixed a problem with overly aggressive range checking for the Stall
4819 operator. The valid range (max 255) is now only checked if the operand is of
4820 type Integer. All other operand types cannot be statically checked.
4822 Fixed a problem where control method references within the RefOf, DeRefOf,
4823 and ObjectType operators were not treated properly. They are now treated as
4824 actual references, not method invocations.
4826 Fixed and enhanced the "list namespace" option (-ln). This option was broken
4827 a number of releases ago.
4829 Improved error handling for the Field, IndexField, and BankField operators.
4830 The compiler now cleanly reports and recovers from errors in the field
4831 component (FieldUnit) list.
4833 Fixed a disassembler problem where the optional ResourceDescriptor fields
4834 TRS and TTP were not always handled correctly.
4836 Disassembler - Comments in output now use "//" instead of "/*"
4838 ----------------------------------------
4839 28 February 2005. Summary of changes for version 20050228:
4841 1) ACPI CA Core Subsystem:
4843 Fixed a problem where the result of an Index() operator (an object
4844 reference) must increment the reference count on the target object for the
4845 life of the object reference.
4847 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
4848 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
4849 resource descriptors.
4851 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
4852 Space Descriptor" string, indicating interpreter support for the descriptors
4855 Implemented header support for the new ACPI 3.0 FADT flag bits.
4857 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
4858 status/enable registers.
4860 Updated header support for the MADT processor local Apic struct and MADT
4861 platform interrupt source struct for new ACPI 3.0 fields.
4863 Implemented header support for the SRAT and SLIT ACPI tables.
4865 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
4868 Code and Data Size: Current and previous core subsystem library sizes are
4869 shown below. These are the code and data sizes for the acpica.lib produced
4870 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4871 any ACPI driver or OSPM code. The debug version of the code includes the
4872 debug output trace mechanism and has a much larger code and data size. Note
4873 that these values will vary depending on the efficiency of the compiler and
4874 the compiler options used during generation.
4877 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4878 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4880 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4881 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4884 2) iASL Compiler/Disassembler:
4886 Fixed a problem with the internal 64-bit String-to-integer conversion with
4887 strings less than two characters long.
4889 Fixed a problem with constant folding where the result of the Index()
4890 operator can not be considered a constant. This means that Index() cannot be
4891 a type3 opcode and this will require an update to the ACPI specification.
4893 Disassembler: Implemented support for the TTP, MTP, and TRS resource
4894 descriptor fields. These fields were inadvertently ignored and not output in
4895 the disassembly of the resource descriptor.
4898 ----------------------------------------
4899 11 February 2005. Summary of changes for version 20050211:
4901 1) ACPI CA Core Subsystem:
4903 Implemented ACPI 3.0 support for implicit conversion within the Match()
4904 operator. MatchObjects can now be of type integer, buffer, or string instead
4905 of just type integer. Package elements are implicitly converted to the type
4906 of the MatchObject. This change aligns the behavior of Match() with the
4907 behavior of the other logical operators (LLess(), etc.) It also requires an
4908 errata change to the ACPI specification as this support was intended for
4909 ACPI 3.0, but was inadvertently omitted.
4911 Fixed a problem with the internal implicit "to buffer" conversion. Strings
4912 that are converted to buffers will cause buffer truncation if the string is
4913 smaller than the target buffer. Integers that are converted to buffers will
4914 not cause buffer truncation, only zero extension (both as per the ACPI
4915 spec.) The problem was introduced when code was added to truncate the
4916 buffer, but this should not be performed in all cases, only the string case.
4918 Fixed a problem with the Buffer and Package operators where the interpreter
4919 would get confused if two such operators were used as operands to an ASL
4920 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
4921 stack was not being popped after the execution of these operators, resulting
4922 in an AE_NO_RETURN_VALUE exception.
4924 Fixed a problem with constructs of the form Store(Index(...),...). The
4925 reference object returned from Index was inadvertently resolved to an actual
4926 value. This problem was introduced in version 20050114 when the behavior of
4927 Store() was modified to restrict the object types that can be used as the
4928 source operand (to match the ACPI specification.)
4930 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
4932 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
4934 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
4936 Code and Data Size: Current and previous core subsystem library sizes are
4937 shown below. These are the code and data sizes for the acpica.lib produced
4938 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4939 any ACPI driver or OSPM code. The debug version of the code includes the
4940 debug output trace mechanism and has a much larger code and data size. Note
4941 that these values will vary depending on the efficiency of the compiler and
4942 the compiler options used during generation.
4945 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4946 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4948 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4949 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4952 2) iASL Compiler/Disassembler:
4954 Fixed a code generation problem in the constant folding optimization code
4955 where incorrect code was generated if a constant was reduced to a buffer
4956 object (i.e., a reduced type 5 opcode.)
4958 Fixed a typechecking problem for the ToBuffer operator. Caused by an
4959 incorrect return type in the internal opcode information table.
4961 ----------------------------------------
4962 25 January 2005. Summary of changes for version 20050125:
4964 1) ACPI CA Core Subsystem:
4966 Fixed a recently introduced problem with the Global Lock where the
4967 underlying semaphore was not created. This problem was introduced in
4968 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
4969 Acquire() operation on _GL.
4971 The local object cache is now optional, and is disabled by default. Both
4972 AcpiExec and the iASL compiler enable the cache because they run in user
4973 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
4974 to enable the local cache.
4976 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
4977 optional "implicit return" support where an error was returned if no return
4978 object was expected, but one was implicitly returned. AE_OK is now returned
4979 in this case and the implicitly returned object is deleted.
4980 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
4981 methods such as _STA and _INI where the return type is known up front.
4983 Fixed a few issues with the internal convert-to-integer code. It now returns
4984 an error if an attempt is made to convert a null string, a string of only
4985 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
4986 and explicit conversion via the ToInteger() operator.
4988 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
4989 not needed for normal operation and should increase the performance of the
4990 entire subsystem. The code remains in case it is needed for debug purposes
4993 The AcpiExec source and makefile are included in the Unix/Linux package for
4996 Code and Data Size: Current and previous core subsystem library sizes are
4997 shown below. These are the code and data sizes for the acpica.lib produced
4998 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4999 any ACPI driver or OSPM code. The debug version of the code includes the
5000 debug output trace mechanism and has a much larger code and data size. Note
5001 that these values will vary depending on the efficiency of the compiler and
5002 the compiler options used during generation.
5005 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
5006 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
5008 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
5009 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
5011 2) iASL Compiler/Disassembler:
5013 Switch/Case support: A warning is now issued if the type of the Switch value
5014 cannot be determined at compile time. For example, Switch(Arg0) will
5015 generate the warning, and the type is assumed to be an integer. As per the
5016 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
5019 Switch/Case support: Implemented support for buffer and string objects as
5020 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
5021 buffers and strings.
5023 Switch/Case support: The emitted code for the LEqual() comparisons now uses
5024 the switch value as the first operand, not the second. The case value is now
5025 the second operand, and this allows the case value to be implicitly
5026 converted to the type of the switch value, not the other way around.
5028 Switch/Case support: Temporary variables are now emitted immediately within
5029 the control method, not at the global level. This means that there are now
5030 36 temps available per-method, not 36 temps per-module as was the case with
5031 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
5033 ----------------------------------------
5034 14 January 2005. Summary of changes for version 20050114:
5036 Added 2005 copyright to all module headers. This affects every module in
5037 the core subsystem, iASL compiler, and the utilities.
5039 1) ACPI CA Core Subsystem:
5041 Fixed an issue with the String-to-Buffer conversion code where the string
5042 null terminator was not included in the buffer after conversion, but there
5043 is existing ASL that assumes the string null terminator is included. This is
5044 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
5045 introduced in the previous version when the code was updated to correctly
5046 set the converted buffer size as per the ACPI specification. The ACPI spec
5047 is ambiguous and will be updated to specify that the null terminator must be
5048 included in the converted buffer. This also affects the ToBuffer() ASL
5051 Fixed a problem with the Mid() ASL/AML operator where it did not work
5052 correctly on Buffer objects. Newly created sub-buffers were not being marked
5056 Fixed a problem in AcpiTbFindTable where incorrect string compares were
5057 performed on the OemId and OemTableId table header fields. These fields are
5058 not null terminated, so strncmp is now used instead of strcmp.
5060 Implemented a restriction on the Store() ASL/AML operator to align the
5061 behavior with the ACPI specification. Previously, any object could be used
5062 as the source operand. Now, the only objects that may be used are Integers,
5063 Buffers, Strings, Packages, Object References, and DDB Handles. If
5064 necessary, the original behavior can be restored by enabling the
5065 EnableInterpreterSlack flag.
5067 Enhanced the optional "implicit return" support to allow an implicit return
5068 value from methods that are invoked externally via the AcpiEvaluateObject
5069 interface. This enables implicit returns from the _STA and _INI methods,
5072 Changed the Revision() ASL/AML operator to return the current version of the
5073 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
5074 the supported ACPI version (This is the function of the _REV method).
5076 Updated the _REV predefined method to return the currently supported version
5079 Implemented batch mode option for the AcpiExec utility (-b).
5081 Code and Data Size: Current and previous core subsystem library sizes are
5082 shown below. These are the code and data sizes for the acpica.lib produced
5083 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5084 any ACPI driver or OSPM code. The debug version of the code includes the
5085 debug output trace mechanism and has a much larger code and data size. Note
5086 that these values will vary depending on the efficiency of the compiler and
5087 the compiler options used during generation.
5090 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5091 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
5093 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
5094 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
5096 ----------------------------------------
5097 10 December 2004. Summary of changes for version 20041210:
5099 ACPI 3.0 support is nearing completion in both the iASL compiler and the
5100 ACPI CA core subsystem.
5102 1) ACPI CA Core Subsystem:
5104 Fixed a problem in the ToDecimalString operator where the resulting string
5105 length was incorrectly calculated. The length is now calculated exactly,
5106 eliminating incorrect AE_STRING_LIMIT exceptions.
5108 Fixed a problem in the ToHexString operator to allow a maximum 200 character
5109 string to be produced.
5111 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
5112 routine where the length of the resulting buffer was not truncated to the
5113 new size (if the target buffer already existed).
5115 Code and Data Size: Current and previous core subsystem library sizes are
5116 shown below. These are the code and data sizes for the acpica.lib produced
5117 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5118 any ACPI driver or OSPM code. The debug version of the code includes the
5119 debug output trace mechanism and has a much larger code and data size. Note
5120 that these values will vary depending on the efficiency of the compiler and
5121 the compiler options used during generation.
5124 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5125 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
5127 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5128 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
5131 2) iASL Compiler/Disassembler:
5133 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
5134 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
5135 Includes support in the disassembler.
5137 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
5140 Fixed a problem where the _HE resource name for the Interrupt macro was
5141 referencing bit 0 instead of bit 1.
5143 Implemented check for maximum 255 interrupts in the Interrupt macro.
5145 Fixed a problem with the predefined resource descriptor names where
5146 incorrect AML code was generated if the offset within the resource buffer
5147 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
5148 but did not update the surrounding package lengths.
5150 Changes to the Dma macro: All channels within the channel list must be in
5151 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
5152 optional (default is BusMaster).
5154 Implemented check for maximum 7 data bytes for the VendorShort macro.
5156 The ReadWrite parameter is now optional for the Memory32 and similar macros.
5158 ----------------------------------------
5159 03 December 2004. Summary of changes for version 20041203:
5161 1) ACPI CA Core Subsystem:
5163 The low-level field insertion/extraction code (exfldio) has been completely
5164 rewritten to eliminate unnecessary complexity, bugs, and boundary
5167 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
5168 operators where the input operand could be inadvertently deleted if no
5169 conversion was necessary (e.g., if the input to ToInteger was an Integer
5172 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
5173 exception code was returned if the resulting string would be > 200 chars.
5174 AE_STRING_LIMIT is now returned.
5176 Fixed a problem with the Concatenate operator where AE_OK was always
5177 returned, even if the operation failed.
5179 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
5180 semaphores to be allocated.
5182 Code and Data Size: Current and previous core subsystem library sizes are
5183 shown below. These are the code and data sizes for the acpica.lib produced
5184 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5185 any ACPI driver or OSPM code. The debug version of the code includes the
5186 debug output trace mechanism and has a much larger code and data size. Note
5187 that these values will vary depending on the efficiency of the compiler and
5188 the compiler options used during generation.
5191 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5192 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5194 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5195 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
5198 2) iASL Compiler/Disassembler:
5200 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
5201 recently introduced in 20041119.
5203 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
5204 byte was inadvertently set to zero.
5206 ----------------------------------------
5207 19 November 2004. Summary of changes for version 20041119:
5209 1) ACPI CA Core Subsystem:
5211 Fixed a problem in the internal ConvertToInteger routine where new integers
5212 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
5213 buffers and strings to integers.
5215 Implemented support to store a value to an Index() on a String object. This
5216 is an ACPI 2.0 feature that had not yet been implemented.
5218 Implemented new behavior for storing objects to individual package elements
5219 (via the Index() operator). The previous behavior was to invoke the implicit
5220 conversion rules if an object was already present at the index. The new
5221 behavior is to simply delete any existing object and directly store the new
5222 object. Although the ACPI specification seems unclear on this subject, other
5223 ACPI implementations behave in this manner. (This is the root of the
5224 AE_BAD_HEX_CONSTANT issue.)
5226 Modified the RSDP memory scan mechanism to support the extended checksum for
5227 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
5228 RSDP signature is found with a valid checksum.
5230 Code and Data Size: Current and previous core subsystem library sizes are
5231 shown below. These are the code and data sizes for the acpica.lib produced
5232 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5233 any ACPI driver or OSPM code. The debug version of the code includes the
5234 debug output trace mechanism and has a much larger code and data size. Note
5235 that these values will vary depending on the efficiency of the compiler and
5236 the compiler options used during generation.
5239 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5240 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5242 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5243 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5246 2) iASL Compiler/Disassembler:
5248 Fixed a missing semicolon in the aslcompiler.y file.
5250 ----------------------------------------
5251 05 November 2004. Summary of changes for version 20041105:
5253 1) ACPI CA Core Subsystem:
5255 Implemented support for FADT revision 2. This was an interim table (between
5256 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
5258 Implemented optional support to allow uninitialized LocalX and ArgX
5259 variables in a control method. The variables are initialized to an Integer
5260 object with a value of zero. This support is enabled by setting the
5261 AcpiGbl_EnableInterpreterSlack flag to TRUE.
5263 Implemented support for Integer objects for the SizeOf operator. Either 4
5264 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
5265 depending on the parent table revision).
5267 Fixed a problem in the implementation of the SizeOf and ObjectType operators
5268 where the operand was resolved to a value too early, causing incorrect
5269 return values for some objects.
5271 Fixed some possible memory leaks during exceptional conditions.
5273 Code and Data Size: Current and previous core subsystem library sizes are
5274 shown below. These are the code and data sizes for the acpica.lib produced
5275 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5276 any ACPI driver or OSPM code. The debug version of the code includes the
5277 debug output trace mechanism and has a much larger code and data size. Note
5278 that these values will vary depending on the efficiency of the compiler and
5279 the compiler options used during generation.
5282 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5283 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
5285 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5286 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5289 2) iASL Compiler/Disassembler:
5291 Implemented support for all ACPI 3.0 reserved names and methods.
5293 Implemented all ACPI 3.0 grammar elements in the front-end, including
5294 support for semicolons.
5296 Implemented the ACPI 3.0 Function() and ToUUID() macros
5298 Fixed a problem in the disassembler where a Scope() operator would not be
5299 emitted properly if the target of the scope was in another table.
5301 ----------------------------------------
5302 15 October 2004. Summary of changes for version 20041015:
5304 Note: ACPI CA is currently undergoing an in-depth and complete formal
5305 evaluation to test/verify the following areas. Other suggestions are
5306 welcome. This will result in an increase in the frequency of releases and
5307 the number of bug fixes in the next few months.
5308 - Functional tests for all ASL/AML operators
5309 - All implicit/explicit type conversions
5310 - Bit fields and operation regions
5311 - 64-bit math support and 32-bit-only "truncated" math support
5312 - Exceptional conditions, both compiler and interpreter
5313 - Dynamic object deletion and memory leaks
5314 - ACPI 3.0 support when implemented
5315 - External interfaces to the ACPI subsystem
5318 1) ACPI CA Core Subsystem:
5320 Fixed two alignment issues on 64-bit platforms - within debug statements in
5321 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
5322 field within the non-aligned ACPI generic address structure.
5324 Fixed a problem in the Increment and Decrement operators where incorrect
5325 operand resolution could result in the inadvertent modification of the
5326 original integer when the integer is passed into another method as an
5327 argument and the arg is then incremented/decremented.
5329 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
5330 BCD number were truncated during conversion.
5332 Fixed a problem in the ToDecimal operator where the length of the resulting
5333 string could be set incorrectly too long if the input operand was a Buffer
5336 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
5337 within a buffer would prematurely terminate a compare between buffer
5340 Added a check for string overflow (>200 characters as per the ACPI
5341 specification) during the Concatenate operator with two string operands.
5343 Code and Data Size: Current and previous core subsystem library sizes are
5344 shown below. These are the code and data sizes for the acpica.lib produced
5345 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5346 any ACPI driver or OSPM code. The debug version of the code includes the
5347 debug output trace mechanism and has a much larger code and data size. Note
5348 that these values will vary depending on the efficiency of the compiler and
5349 the compiler options used during generation.
5352 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5353 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
5355 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5356 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
5360 2) iASL Compiler/Disassembler:
5362 Allow the use of the ObjectType operator on uninitialized Locals and Args
5363 (returns 0 as per the ACPI specification).
5365 Fixed a problem where the compiler would fault if there was a syntax error
5366 in the FieldName of all of the various CreateXXXField operators.
5368 Disallow the use of lower case letters within the EISAID macro, as per the
5369 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
5370 U is an uppercase letter and N is a hex digit.
5373 ----------------------------------------
5374 06 October 2004. Summary of changes for version 20041006:
5376 1) ACPI CA Core Subsystem:
5378 Implemented support for the ACPI 3.0 Timer operator. This ASL function
5379 implements a 64-bit timer with 100 nanosecond granularity.
5381 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
5382 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
5383 the timer with the best clock available. Also, it keeps the core subsystem
5384 out of the clock handling business, since the host OS (usually) performs
5387 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
5388 functions use a 64-bit address which is part of the packed ACPI Generic
5389 Address Structure. Since the structure is non-aligned, the alignment macros
5390 are now used to extract the address to a local variable before use.
5392 Fixed a problem where the ToInteger operator assumed all input strings were
5393 hexadecimal. The operator now handles both decimal strings and hex strings
5394 (prefixed with "0x").
5396 Fixed a problem where the string length in the string object created as a
5397 result of the internal ConvertToString procedure could be incorrect. This
5398 potentially affected all implicit conversions and also the ToDecimalString
5399 and ToHexString operators.
5401 Fixed two problems in the ToString operator. If the length parameter was
5402 zero, an incorrect string object was created and the value of the input
5403 length parameter was inadvertently changed from zero to Ones.
5405 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
5406 resource macro was ignored.
5408 Simplified the interfaces to the internal division functions, reducing code
5409 size and complexity.
5411 Code and Data Size: Current and previous core subsystem library sizes are
5412 shown below. These are the code and data sizes for the acpica.lib produced
5413 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5414 any ACPI driver or OSPM code. The debug version of the code includes the
5415 debug output trace mechanism and has a much larger code and data size. Note
5416 that these values will vary depending on the efficiency of the compiler and
5417 the compiler options used during generation.
5420 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
5421 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
5423 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5424 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
5427 2) iASL Compiler/Disassembler:
5429 Implemented support for the ACPI 3.0 Timer operator.
5431 Fixed a problem where the Default() operator was inadvertently ignored in a
5432 Switch/Case block. This was a problem in the translation of the Switch
5433 statement to If...Else pairs.
5435 Added support to allow a standalone Return operator, with no parentheses (or
5438 Fixed a problem with code generation for the ElseIf operator where the
5439 translated Else...If parse tree was improperly constructed leading to the
5442 ----------------------------------------
5443 22 September 2004. Summary of changes for version 20040922:
5445 1) ACPI CA Core Subsystem:
5447 Fixed a problem with the implementation of the LNot() operator where "Ones"
5448 was not returned for the TRUE case. Changed the code to return Ones instead
5449 of (!Arg) which was usually 1. This change affects iASL constant folding for
5452 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
5453 initialized properly -- Now zero the entire buffer in this case where the
5454 buffer already exists.
5456 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
5457 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
5458 related code considerably. This will require changes/updates to all OS
5459 interface layers (OSLs.)
5461 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
5462 a system exception handler to be installed. This handler is invoked upon any
5463 run-time exception that occurs during control method execution.
5465 Added support for the DSDT in AcpiTbFindTable. This allows the
5466 DataTableRegion() operator to access the local copy of the DSDT.
5468 Code and Data Size: Current and previous core subsystem library sizes are
5469 shown below. These are the code and data sizes for the acpica.lib produced
5470 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5471 any ACPI driver or OSPM code. The debug version of the code includes the
5472 debug output trace mechanism and has a much larger code and data size. Note
5473 that these values will vary depending on the efficiency of the compiler and
5474 the compiler options used during generation.
5477 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
5478 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
5480 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
5481 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
5484 2) iASL Compiler/Disassembler:
5486 Fixed a problem with constant folding and the LNot operator. LNot was
5487 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
5488 could result in the generation of an incorrect folded/reduced constant.
5490 End-Of-File is now allowed within a "//"-style comment. A parse error no
5491 longer occurs if such a comment is at the very end of the input ASL source
5494 Implemented the "-r" option to override the Revision in the table header.
5495 The initial use of this option will be to simplify the evaluation of the AML
5496 interpreter by allowing a single ASL source module to be compiled for either
5497 32-bit or 64-bit integers.
5500 ----------------------------------------
5501 27 August 2004. Summary of changes for version 20040827:
5503 1) ACPI CA Core Subsystem:
5505 - Implemented support for implicit object conversion in the non-numeric
5506 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
5507 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
5508 the second operand is implicitly converted on the fly to match the type of
5509 the first operand. For example:
5511 LEqual (Source1, Source2)
5513 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
5514 The data type of Source1 dictates the required type of Source2. Source2 is
5515 implicitly converted if necessary to match the type of Source1.
5517 - Updated and corrected the behavior of the string conversion support. The
5518 rules concerning conversion of buffers to strings (according to the ACPI
5519 specification) are as follows:
5521 ToDecimalString - explicit byte-wise conversion of buffer to string of
5522 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
5523 conversion of buffer to string of hex values (0-FF) separated by commas.
5524 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
5525 copy with no transform except NULL terminated. Any other implicit buffer-to-
5526 string conversion - byte-wise conversion of buffer to string of hex values
5527 (0-FF) separated by spaces.
5529 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
5531 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
5532 one byte too short in the case of a node in the root scope. This could
5533 cause a fault during debug output.
5535 - Code and Data Size: Current and previous core subsystem library sizes are
5536 shown below. These are the code and data sizes for the acpica.lib produced
5537 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5538 any ACPI driver or OSPM code. The debug version of the code includes the
5539 debug output trace mechanism and has a much larger code and data size. Note
5540 that these values will vary depending on the efficiency of the compiler and
5541 the compiler options used during generation.
5544 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5545 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5547 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
5548 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
5551 2) iASL Compiler/Disassembler:
5553 - Fixed a Linux generation error.
5556 ----------------------------------------
5557 16 August 2004. Summary of changes for version 20040816:
5559 1) ACPI CA Core Subsystem:
5561 Designed and implemented support within the AML interpreter for the so-
5562 called "implicit return". This support returns the result of the last ASL
5563 operation within a control method, in the absence of an explicit Return()
5564 operator. A few machines depend on this behavior, even though it is not
5565 explicitly supported by the ASL language. It is optional support that can
5566 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
5568 Removed support for the PCI_Config address space from the internal low level
5569 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
5570 support was not used internally, and would not work correctly anyway because
5571 the PCI bus number and segment number were not supported. There are
5572 separate interfaces for PCI configuration space access because of the unique
5575 Code and Data Size: Current and previous core subsystem library sizes are
5576 shown below. These are the code and data sizes for the acpica.lib produced
5577 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5578 any ACPI driver or OSPM code. The debug version of the code includes the
5579 debug output trace mechanism and has a much larger code and data size. Note
5580 that these values will vary depending on the efficiency of the compiler and
5581 the compiler options used during generation.
5584 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5585 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5587 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5588 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5591 2) iASL Compiler/Disassembler:
5593 Fixed a problem where constants in ASL expressions at the root level (not
5594 within a control method) could be inadvertently truncated during code
5595 generation. This problem was introduced in the 20040715 release.
5598 ----------------------------------------
5599 15 July 2004. Summary of changes for version 20040715:
5601 1) ACPI CA Core Subsystem:
5603 Restructured the internal HW GPE interfaces to pass/track the current state
5604 of interrupts (enabled/disabled) in order to avoid possible deadlock and
5605 increase flexibility of the interfaces.
5607 Implemented a "lexicographical compare" for String and Buffer objects within
5608 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
5609 as per further clarification to the ACPI specification. Behavior is similar
5610 to C library "strcmp".
5612 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
5613 external function. In the 32-bit non-debug case, the stack use has been
5614 reduced from 168 bytes to 32 bytes.
5616 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
5617 whose purpose is to allow the AML interpreter to forgive certain bad AML
5618 constructs. Default setting is FALSE.
5620 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
5621 support code. If enabled, it allows field access to go beyond the end of a
5622 region definition if the field is within the region length rounded up to the
5623 next access width boundary (a common coding error.)
5625 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
5626 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
5627 symbols are lowercased by the latest version of the AcpiSrc tool.
5629 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
5630 rename "Register" to simply "Reg" to prevent certain compilers from
5633 Code and Data Size: Current and previous core subsystem library sizes are
5634 shown below. These are the code and data sizes for the acpica.lib produced
5635 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5636 any ACPI driver or OSPM code. The debug version of the code includes the
5637 debug output trace mechanism and has a much larger code and data size. Note
5638 that these values will vary depending on the efficiency of the compiler and
5639 the compiler options used during generation.
5642 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5643 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5645 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5646 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5649 2) iASL Compiler/Disassembler:
5651 Implemented full support for Package objects within the Case() operator.
5652 Note: The Break() operator is currently not supported within Case blocks
5653 (TermLists) as there is some question about backward compatibility with ACPI
5657 Fixed a problem where complex terms were not supported properly within the
5660 Eliminated extraneous warning for compiler-emitted reserved names of the
5661 form "_T_x". (Used in Switch/Case operators.)
5663 Eliminated optimization messages for "_T_x" objects and small constants
5664 within the DefinitionBlock operator.
5667 ----------------------------------------
5668 15 June 2004. Summary of changes for version 20040615:
5670 1) ACPI CA Core Subsystem:
5672 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5673 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5676 All directory names in the entire source package are lower case, as they
5677 were in earlier releases.
5679 Implemented "Disassemble" command in the AML debugger that will disassemble
5680 a single control method.
5682 Code and Data Size: Current and previous core subsystem library sizes are
5683 shown below. These are the code and data sizes for the acpica.lib produced
5684 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5685 any ACPI driver or OSPM code. The debug version of the code includes the
5686 debug output trace mechanism and has a much larger code and data size. Note
5687 that these values will vary depending on the efficiency of the compiler and
5688 the compiler options used during generation.
5691 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5692 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5695 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5696 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5699 2) iASL Compiler/Disassembler:
5701 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5702 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5705 All directory names in the entire source package are lower case, as they
5706 were in earlier releases.
5708 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
5711 Fixed an issue with the Windows version of the compiler where later versions
5712 of Windows place the FADT in the registry under the name "FADT" and not
5713 "FACP" as earlier versions did. This applies when using the -g or -
5714 d<nofilename> options. The compiler now looks for both strings as
5717 Fixed a problem with compiler namepath optimization where a namepath within
5718 the Scope() operator could not be optimized if the namepath was a subpath of
5719 the current scope path.
5721 ----------------------------------------
5722 27 May 2004. Summary of changes for version 20040527:
5724 1) ACPI CA Core Subsystem:
5726 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
5727 support in the RSDP scan code. The original code improperly scanned for the
5728 EBDA by simply scanning from memory location 0 to 0x400. The correct method
5729 is to first obtain the EBDA pointer from within the BIOS data area, then
5730 scan 1K of memory starting at the EBDA pointer. There appear to be few if
5731 any machines that place the RSDP in the EBDA, however.
5733 Integrated a fix for a possible fault during evaluation of BufferField
5734 arguments. Obsolete code that was causing the problem was removed.
5736 Found and fixed a problem in the Field Support Code where data could be
5737 corrupted on a bit field read that starts on an aligned boundary but does
5738 not end on an aligned boundary. Merged the read/write "datum length"
5739 calculation code into a common procedure.
5741 Rolled in a couple of changes to the FreeBSD-specific header.
5744 Code and Data Size: Current and previous core subsystem library sizes are
5745 shown below. These are the code and data sizes for the acpica.lib produced
5746 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5747 any ACPI driver or OSPM code. The debug version of the code includes the
5748 debug output trace mechanism and has a much larger code and data size. Note
5749 that these values will vary depending on the efficiency of the compiler and
5750 the compiler options used during generation.
5753 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5754 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5756 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5757 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5760 2) iASL Compiler/Disassembler:
5762 Fixed a generation warning produced by some overly-verbose compilers for a
5765 ----------------------------------------
5766 14 May 2004. Summary of changes for version 20040514:
5768 1) ACPI CA Core Subsystem:
5770 Fixed a problem where hardware GPE enable bits sometimes not set properly
5771 during and after GPE method execution. Result of 04/27 changes.
5773 Removed extra "clear all GPEs" when sleeping/waking.
5775 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
5776 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
5777 the new AcpiEv* calls as appropriate.
5779 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
5780 now "Microsoft Windows NT" for maximum compatibility. However this can be
5781 changed by modifying the acconfig.h file.
5783 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
5784 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
5786 Run _INI methods on ThermalZone objects. This is against the ACPI
5787 specification, but there is apparently ASL code in the field that has these
5788 _INI methods, and apparently "other" AML interpreters execute them.
5790 Performed a full 16/32/64 bit lint that resulted in some small changes.
5792 Added a sleep simulation command to the AML debugger to test sleep code.
5794 Code and Data Size: Current and previous core subsystem library sizes are
5795 shown below. These are the code and data sizes for the acpica.lib produced
5796 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5797 any ACPI driver or OSPM code. The debug version of the code includes the
5798 debug output trace mechanism and has a much larger code and data size. Note
5799 that these values will vary depending on the efficiency of the compiler and
5800 the compiler options used during generation.
5803 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5804 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5806 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5807 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5809 ----------------------------------------
5810 27 April 2004. Summary of changes for version 20040427:
5812 1) ACPI CA Core Subsystem:
5814 Completed a major overhaul of the GPE handling within ACPI CA. There are
5815 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
5816 The only GPEs allowed to be combination wake/run are for button-style
5817 devices such as a control-method power button, control-method sleep button,
5818 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
5819 referenced by any _PRW methods are marked for "runtime" and hardware
5820 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
5821 (and disabled at runtime). However, at sleep time, only those GPEs that
5822 have been specifically enabled for wake via the AcpiEnableGpe interface will
5823 actually be hardware enabled.
5825 A new external interface has been added, AcpiSetGpeType(), that is meant to
5826 be used by device drivers to force a GPE to a particular type. It will be
5827 especially useful for the drivers for the button devices mentioned above.
5829 Completed restructuring of the ACPI CA initialization sequence so that
5830 default operation region handlers are installed before GPEs are initialized
5831 and the _PRW methods are executed. This will prevent errors when the _PRW
5832 methods attempt to access system memory or I/O space.
5834 GPE enable/disable no longer reads the GPE enable register. We now keep the
5835 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
5836 thus no longer depend on the hardware to maintain these bits.
5838 Always clear the wake status and fixed/GPE status bits before sleep, even
5841 Improved the AML debugger output for displaying the GPE blocks and their
5844 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
5847 Fixed a problem where the physical address was incorrectly calculated when
5848 the Load() operator was used to directly load from an Operation Region (vs.
5849 loading from a Field object.) Also added check for minimum table length for
5852 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
5855 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
5856 consistency with the other fields returned.
5858 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
5859 structure for each GPE in the system, so the size of this structure is
5862 CPU stack requirement reduction: Cleaned up the method execution and object
5863 evaluation paths so that now a parameter structure is passed, instead of
5864 copying the various method parameters over and over again.
5866 In evregion.c: Correctly exit and reenter the interpreter region if and
5867 only if dispatching an operation region request to a user-installed handler.
5868 Do not exit/reenter when dispatching to a default handler (e.g., default
5869 system memory or I/O handlers)
5872 Notes for updating drivers for the new GPE support. The following changes
5873 must be made to ACPI-related device drivers that are attached to one or more
5874 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
5876 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
5877 explicitly call AcpiEnableGpe.
5878 2) There is a new interface called AcpiSetGpeType. This should be called
5879 before enabling the GPE. Also, this interface will automatically disable
5880 the GPE if it is currently enabled.
5881 3) AcpiEnableGpe no longer supports a GPE type flag.
5883 Specific drivers that must be changed:
5885 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
5886 AeGpeHandler, NULL);
5887 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
5888 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
5890 2) Button Drivers (Power, Lid, Sleep):
5891 Run _PRW method under parent device
5892 If _PRW exists: /* This is a control-method button */
5893 Extract GPE number and possibly GpeDevice
5894 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
5895 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
5897 For all other devices that have _PRWs, we automatically set the GPE type to
5898 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
5899 must be done on a selective basis, usually requiring some kind of user app
5900 to allow the user to pick the wake devices.
5903 Code and Data Size: Current and previous core subsystem library sizes are
5904 shown below. These are the code and data sizes for the acpica.lib produced
5905 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5906 any ACPI driver or OSPM code. The debug version of the code includes the
5907 debug output trace mechanism and has a much larger code and data size. Note
5908 that these values will vary depending on the efficiency of the compiler and
5909 the compiler options used during generation.
5912 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5913 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5916 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5917 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5921 ----------------------------------------
5922 02 April 2004. Summary of changes for version 20040402:
5924 1) ACPI CA Core Subsystem:
5926 Fixed an interpreter problem where an indirect store through an ArgX
5927 parameter was incorrectly applying the "implicit conversion rules" during
5928 the store. From the ACPI specification: "If the target is a method local or
5929 argument (LocalX or ArgX), no conversion is performed and the result is
5930 stored directly to the target". The new behavior is to disable implicit
5931 conversion during ALL stores to an ArgX.
5933 Changed the behavior of the _PRW method scan to ignore any and all errors
5934 returned by a given _PRW. This prevents the scan from aborting from the
5935 failure of any single _PRW.
5937 Moved the runtime configuration parameters from the global init procedure to
5938 static variables in acglobal.h. This will allow the host to override the
5939 default values easily.
5941 Code and Data Size: Current and previous core subsystem library sizes are
5942 shown below. These are the code and data sizes for the acpica.lib produced
5943 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5944 any ACPI driver or OSPM code. The debug version of the code includes the
5945 debug output trace mechanism and has a much larger code and data size. Note
5946 that these values will vary depending on the efficiency of the compiler and
5947 the compiler options used during generation.
5950 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5951 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5953 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5954 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5957 2) iASL Compiler/Disassembler:
5959 iASL now fully disassembles SSDTs. However, External() statements are not
5960 generated automatically for unresolved symbols at this time. This is a
5961 planned feature for future implementation.
5963 Fixed a scoping problem in the disassembler that occurs when the type of the
5964 target of a Scope() operator is overridden. This problem caused an
5965 incorrectly nested internal namespace to be constructed.
5967 Any warnings or errors that are emitted during disassembly are now commented
5968 out automatically so that the resulting file can be recompiled without any
5971 ----------------------------------------
5972 26 March 2004. Summary of changes for version 20040326:
5974 1) ACPI CA Core Subsystem:
5976 Implemented support for "wake" GPEs via interaction between GPEs and the
5977 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
5978 identified as a WAKE GPE and by default will no longer be enabled at
5979 runtime. Previously, we were blindly enabling all GPEs with a corresponding
5980 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
5981 believe this has been the cause of thousands of "spurious" GPEs on some
5984 This new GPE behavior is can be reverted to the original behavior (enable
5985 ALL GPEs at runtime) via a runtime flag.
5987 Fixed a problem where aliased control methods could not access objects
5988 properly. The proper scope within the namespace was not initialized
5989 (transferred to the target of the aliased method) before executing the
5992 Fixed a potential race condition on internal object deletion on the return
5993 object in AcpiEvaluateObject.
5995 Integrated a fix for resource descriptors where both _MEM and _MTP were
5996 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5997 wide, 0x0F instead of 0x03.)
5999 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
6000 fault in some cases.
6002 Updated Notify() values for debug statements in evmisc.c
6004 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
6006 Code and Data Size: Current and previous core subsystem library sizes are
6007 shown below. These are the code and data sizes for the acpica.lib produced
6008 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6009 any ACPI driver or OSPM code. The debug version of the code includes the
6010 debug output trace mechanism and has a much larger code and data size. Note
6011 that these values will vary depending on the efficiency of the compiler and
6012 the compiler options used during generation.
6016 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
6017 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
6019 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
6020 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
6022 ----------------------------------------
6023 11 March 2004. Summary of changes for version 20040311:
6025 1) ACPI CA Core Subsystem:
6027 Fixed a problem where errors occurring during the parse phase of control
6028 method execution did not abort cleanly. For example, objects created and
6029 installed in the namespace were not deleted. This caused all subsequent
6030 invocations of the method to return the AE_ALREADY_EXISTS exception.
6032 Implemented a mechanism to force a control method to "Serialized" execution
6033 if the method attempts to create namespace objects. (The root of the
6034 AE_ALREADY_EXISTS problem.)
6036 Implemented support for the predefined _OSI "internal" control method.
6037 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
6038 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
6039 This feature will allow "other" operating systems to execute the fully
6040 tested, "Windows" code path through the ASL code
6042 Global Lock Support: Now allows multiple acquires and releases with any
6043 internal thread. Removed concept of "owning thread" for this special mutex.
6045 Fixed two functions that were inappropriately declaring large objects on the
6046 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
6047 method execution considerably.
6049 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
6050 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
6052 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
6053 defined on the machine.
6055 Implemented two runtime options: One to force all control method execution
6056 to "Serialized" to mimic Windows behavior, another to disable _OSI support
6057 if it causes problems on a given machine.
6059 Code and Data Size: Current and previous core subsystem library sizes are
6060 shown below. These are the code and data sizes for the acpica.lib produced
6061 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6062 any ACPI driver or OSPM code. The debug version of the code includes the
6063 debug output trace mechanism and has a much larger code and data size. Note
6064 that these values will vary depending on the efficiency of the compiler and
6065 the compiler options used during generation.
6068 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
6069 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
6071 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
6072 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
6074 2) iASL Compiler/Disassembler:
6076 Fixed an array size problem for FreeBSD that would cause the compiler to
6079 ----------------------------------------
6080 20 February 2004. Summary of changes for version 20040220:
6083 1) ACPI CA Core Subsystem:
6085 Implemented execution of _SxD methods for Device objects in the
6086 GetObjectInfo interface.
6088 Fixed calls to _SST method to pass the correct arguments.
6090 Added a call to _SST on wake to restore to "working" state.
6092 Check for End-Of-Buffer failure case in the WalkResources interface.
6094 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
6095 structures to the beginning of the file.
6097 After wake, clear GPE status register(s) before enabling GPEs.
6099 After wake, clear/enable power button. (Perhaps we should clear/enable all
6100 fixed events upon wake.)
6102 Fixed a couple of possible memory leaks in the Namespace manager.
6104 Integrated latest acnetbsd.h file.
6106 ----------------------------------------
6107 11 February 2004. Summary of changes for version 20040211:
6110 1) ACPI CA Core Subsystem:
6112 Completed investigation and implementation of the call-by-reference
6113 mechanism for control method arguments.
6115 Fixed a problem where a store of an object into an indexed package could
6116 fail if the store occurs within a different method than the method that
6117 created the package.
6119 Fixed a problem where the ToDecimal operator could return incorrect results.
6121 Fixed a problem where the CopyObject operator could fail on some of the more
6122 obscure objects (e.g., Reference objects.)
6124 Improved the output of the Debug object to display buffer, package, and
6127 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
6128 the expected result.
6130 Added permanent ACPI_REPORT_ERROR macros for all instances of the
6131 ACPI_AML_INTERNAL exception.
6133 Integrated latest version of acfreebsd.h
6135 ----------------------------------------
6136 16 January 2004. Summary of changes for version 20040116:
6138 The purpose of this release is primarily to update the copyright years in
6139 each module, thus causing a huge number of diffs. There are a few small
6140 functional changes, however.
6142 1) ACPI CA Core Subsystem:
6144 Improved error messages when there is a problem finding one or more of the
6145 required base ACPI tables
6147 Reintroduced the definition of APIC_HEADER in actbl.h
6149 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
6151 Removed extraneous reference to NewObj in dsmthdat.c
6155 Fixed a problem introduced in December that disabled the correct disassembly
6156 of Resource Templates
6159 ----------------------------------------
6160 03 December 2003. Summary of changes for version 20031203:
6162 1) ACPI CA Core Subsystem:
6164 Changed the initialization of Operation Regions during subsystem
6165 init to perform two entire walks of the ACPI namespace; The first
6166 to initialize the regions themselves, the second to execute the
6167 _REG methods. This fixed some interdependencies across _REG
6168 methods found on some machines.
6170 Fixed a problem where a Store(Local0, Local1) could simply update
6171 the object reference count, and not create a new copy of the
6172 object if the Local1 is uninitialized.
6174 Implemented support for the _SST reserved method during sleep
6177 Implemented support to clear the SLP_TYP and SLP_EN bits when
6178 waking up, this is apparently required by some machines.
6180 When sleeping, clear the wake status only if SleepState is not S5.
6182 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
6183 pointer arithmetic advanced a string pointer too far.
6185 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
6186 could be returned if the requested table has not been loaded.
6188 Within the support for IRQ resources, restructured the handling of
6189 the active and edge/level bits.
6191 Fixed a few problems in AcpiPsxExecute() where memory could be
6192 leaked under certain error conditions.
6194 Improved error messages for the cases where the ACPI mode could
6197 Code and Data Size: Current and previous core subsystem library
6198 sizes are shown below. These are the code and data sizes for the
6199 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6200 these values do not include any ACPI driver or OSPM code. The
6201 debug version of the code includes the debug output trace
6202 mechanism and has a much larger code and data size. Note that
6203 these values will vary depending on the efficiency of the compiler
6204 and the compiler options used during generation.
6206 Previous Release (20031029):
6207 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
6208 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
6210 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
6211 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
6213 2) iASL Compiler/Disassembler:
6215 Implemented a fix for the iASL disassembler where a bad index was
6216 generated. This was most noticeable on 64-bit platforms
6219 ----------------------------------------
6220 29 October 2003. Summary of changes for version 20031029:
6222 1) ACPI CA Core Subsystem:
6225 Fixed a problem where a level-triggered GPE with an associated
6226 _Lxx control method was incorrectly cleared twice.
6228 Fixed a problem with the Field support code where an access can
6229 occur beyond the end-of-region if the field is non-aligned but
6230 extends to the very end of the parent region (resulted in an
6231 AE_AML_REGION_LIMIT exception.)
6233 Fixed a problem with ACPI Fixed Events where an RT Clock handler
6234 would not get invoked on an RTC event. The RTC event bitmasks for
6235 the PM1 registers were not being initialized properly.
6237 Implemented support for executing _STA and _INI methods for
6238 Processor objects. Although this is currently not part of the
6239 ACPI specification, there is existing ASL code that depends on the
6240 init-time execution of these methods.
6242 Implemented and deployed a GetDescriptorName function to decode
6243 the various types of internal descriptors. Guards against null
6244 descriptors during debug output also.
6246 Implemented and deployed a GetNodeName function to extract the 4-
6247 character namespace node name. This function simplifies the debug
6248 and error output, as well as guarding against null pointers during
6251 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
6252 simplify the debug and error output of 64-bit integers. This
6253 macro replaces the HIDWORD and LODWORD macros for dumping these
6256 Updated the implementation of the Stall() operator to only call
6257 AcpiOsStall(), and also return an error if the operand is larger
6258 than 255. This preserves the required behavior of not
6259 relinquishing the processor, as would happen if AcpiOsSleep() was
6260 called for "long stalls".
6262 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
6263 initialized are now treated as NOOPs.
6265 Cleaned up a handful of warnings during 64-bit generation.
6267 Fixed a reported error where and incorrect GPE number was passed
6268 to the GPE dispatch handler. This value is only used for error
6269 output, however. Used this opportunity to clean up and streamline
6270 the GPE dispatch code.
6272 Code and Data Size: Current and previous core subsystem library
6273 sizes are shown below. These are the code and data sizes for the
6274 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6275 these values do not include any ACPI driver or OSPM code. The
6277 debug version of the code includes the debug output trace
6278 mechanism and has a much larger code and data size. Note that
6279 these values will vary depending on the efficiency of the compiler
6280 and the compiler options used during generation.
6282 Previous Release (20031002):
6283 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
6284 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
6286 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
6287 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
6290 2) iASL Compiler/Disassembler:
6292 Updated the iASL compiler to return an error if the operand to the
6293 Stall() operator is larger than 255.
6296 ----------------------------------------
6297 02 October 2003. Summary of changes for version 20031002:
6300 1) ACPI CA Core Subsystem:
6302 Fixed a problem with Index Fields where the index was not
6303 incremented for fields that require multiple writes to the
6304 index/data registers (Fields that are wider than the data
6307 Fixed a problem with all Field objects where a write could go
6308 beyond the end-of-field if the field was larger than the access
6309 granularity and therefore required multiple writes to complete the
6310 request. An extra write beyond the end of the field could happen
6313 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
6314 would incorrectly be returned if the width of the Data Register
6315 was larger than the specified field access width.
6317 Completed fixes for LoadTable() and Unload() and verified their
6318 operation. Implemented full support for the "DdbHandle" object
6319 throughout the ACPI CA subsystem.
6321 Implemented full support for the MADT and ECDT tables in the ACPI
6322 CA header files. Even though these tables are not directly
6323 consumed by ACPI CA, the header definitions are useful for ACPI
6326 Integrated resource descriptor fixes posted to the Linux ACPI
6327 list. This included checks for minimum descriptor length, and
6328 support for trailing NULL strings within descriptors that have
6329 optional string elements.
6331 Code and Data Size: Current and previous core subsystem library
6332 sizes are shown below. These are the code and data sizes for the
6333 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6334 these values do not include any ACPI driver or OSPM code. The
6335 debug version of the code includes the debug output trace
6336 mechanism and has a much larger code and data size. Note that
6337 these values will vary depending on the efficiency of the compiler
6338 and the compiler options used during generation.
6340 Previous Release (20030918):
6341 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
6342 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
6344 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
6345 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
6350 Implemented detection of non-ASCII characters within the input
6351 source ASL file. This catches attempts to compile binary (AML)
6352 files early in the compile, with an informative error message.
6354 Fixed a problem where the disassembler would fault if the output
6355 filename could not be generated or if the output file could not be
6358 ----------------------------------------
6359 18 September 2003. Summary of changes for version 20030918:
6362 1) ACPI CA Core Subsystem:
6364 Found and fixed a longstanding problem with the late execution of
6365 the various deferred AML opcodes (such as Operation Regions,
6366 Buffer Fields, Buffers, and Packages). If the name string
6367 specified for the name of the new object placed the object in a
6368 scope other than the current scope, the initialization/execution
6369 of the opcode failed. The solution to this problem was to
6370 implement a mechanism where the late execution of such opcodes
6371 does not attempt to lookup/create the name a second time in an
6372 incorrect scope. This fixes the "region size computed
6373 incorrectly" problem.
6375 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
6376 Global Lock AE_BAD_PARAMETER error.
6378 Fixed several 64-bit issues with prototypes, casting and data
6381 Removed duplicate prototype from acdisasm.h
6383 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
6385 Code and Data Size: Current and previous core subsystem library
6386 sizes are shown below. These are the code and data sizes for the
6387 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6388 these values do not include any ACPI driver or OSPM code. The
6389 debug version of the code includes the debug output trace
6390 mechanism and has a much larger code and data size. Note that
6391 these values will vary depending on the efficiency of the compiler
6392 and the compiler options used during generation.
6396 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
6397 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
6399 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
6400 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
6405 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
6406 correct sleep time in seconds.
6408 ----------------------------------------
6409 14 July 2003. Summary of changes for version 20030619:
6411 1) ACPI CA Core Subsystem:
6413 Parse SSDTs in order discovered, as opposed to reverse order
6416 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
6423 Dynamically allocate SDT list (suggested by Andi Kleen)
6425 proc function return value cleanups (Andi Kleen)
6427 Correctly handle NMI watchdog during long stalls (Andrew Morton)
6429 Make it so acpismp=force works (reported by Andrew Morton)
6432 ----------------------------------------
6433 19 June 2003. Summary of changes for version 20030619:
6435 1) ACPI CA Core Subsystem:
6437 Fix To/FromBCD, eliminating the need for an arch-specific #define.
6439 Do not acquire a semaphore in the S5 shutdown path.
6441 Fix ex_digits_needed for 0. (Takayoshi Kochi)
6443 Fix sleep/stall code reversal. (Andi Kleen)
6445 Revert a change having to do with control method calling
6450 acpiphp update (Takayoshi Kochi)
6452 Export acpi_disabled for sonypi (Stelian Pop)
6454 Mention acpismp=force in config help
6456 Re-add acpitable.c and acpismp=force. This improves backwards
6458 compatibility and also cleans up the code to a significant degree.
6460 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
6462 ----------------------------------------
6463 22 May 2003. Summary of changes for version 20030522:
6465 1) ACPI CA Core Subsystem:
6467 Found and fixed a reported problem where an AE_NOT_FOUND error
6468 occurred occasionally during _BST evaluation. This turned out to
6469 be an Owner ID allocation issue where a called method did not get
6470 a new ID assigned to it. Eventually, (after 64k calls), the Owner
6471 ID UINT16 would wraparound so that the ID would be the same as the
6472 caller's and the called method would delete the caller's
6475 Implemented extended error reporting for control methods that are
6476 aborted due to a run-time exception. Output includes the exact
6477 AML instruction that caused the method abort, a dump of the method
6478 locals and arguments at the time of the abort, and a trace of all
6479 nested control method calls.
6481 Modified the interpreter to allow the creation of buffers of zero
6482 length from the AML code. Implemented new code to ensure that no
6483 attempt is made to actually allocate a memory buffer (of length
6484 zero) - instead, a simple buffer object with a NULL buffer pointer
6485 and length zero is created. A warning is no longer issued when
6486 the AML attempts to create a zero-length buffer.
6488 Implemented a workaround for the "leading asterisk issue" in
6489 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
6490 asterisk is automatically removed if present in any HID, UID, or
6491 CID strings. The iASL compiler will still flag this asterisk as
6494 Implemented full support for _CID methods that return a package of
6495 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
6496 now additionally returns a device _CID list if present. This
6497 required a change to the external interface in order to pass an
6498 ACPI_BUFFER object as a parameter since the _CID list is of
6501 Fixed a problem with the new AE_SAME_HANDLER exception where
6502 handler initialization code did not know about this exception.
6504 Code and Data Size: Current and previous core subsystem library
6505 sizes are shown below. These are the code and data sizes for the
6506 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6507 these values do not include any ACPI driver or OSPM code. The
6508 debug version of the code includes the debug output trace
6509 mechanism and has a much larger code and data size. Note that
6510 these values will vary depending on the efficiency of the compiler
6511 and the compiler options used during generation.
6513 Previous Release (20030509):
6514 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
6515 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
6517 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
6518 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
6523 Fixed a bug in which we would reinitialize the ACPI interrupt
6524 after it was already working, thus disabling all ACPI and the IRQs
6525 for any other device sharing the interrupt. (Thanks to Stian
6528 Toshiba driver update (John Belmonte)
6530 Return only 0 or 1 for our interrupt handler status (Andrew
6536 Fixed a reported problem where multiple (nested) ElseIf()
6537 statements were not handled correctly by the compiler, resulting
6538 in incorrect warnings and incorrect AML code. This was a problem
6539 in both the ASL parser and the code generator.
6544 Added changes to existing interfaces, new exception codes, and new
6545 text concerning reference count object management versus garbage
6548 ----------------------------------------
6549 09 May 2003. Summary of changes for version 20030509.
6552 1) ACPI CA Core Subsystem:
6554 Changed the subsystem initialization sequence to hold off
6555 installation of address space handlers until the hardware has been
6556 initialized and the system has entered ACPI mode. This is because
6557 the installation of space handlers can cause _REG methods to be
6558 run. Previously, the _REG methods could potentially be run before
6559 ACPI mode was enabled.
6561 Fixed some memory leak issues related to address space handler and
6562 notify handler installation. There were some problems with the
6563 reference count mechanism caused by the fact that the handler
6564 objects are shared across several namespace objects.
6566 Fixed a reported problem where reference counts within the
6567 namespace were not properly updated when named objects created by
6568 method execution were deleted.
6570 Fixed a reported problem where multiple SSDTs caused a deletion
6571 issue during subsystem termination. Restructured the table data
6572 structures to simplify the linked lists and the related code.
6574 Fixed a problem where the table ID associated with secondary
6575 tables (SSDTs) was not being propagated into the namespace objects
6576 created by those tables. This would only present a problem for
6577 tables that are unloaded at run-time, however.
6579 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
6580 type as the length parameter (instead of UINT32).
6582 Solved a long-standing problem where an ALREADY_EXISTS error
6583 appears on various systems. This problem could happen when there
6584 are multiple PCI_Config operation regions under a single PCI root
6585 bus. This doesn't happen very frequently, but there are some
6586 systems that do this in the ASL.
6588 Fixed a reported problem where the internal DeleteNode function
6589 was incorrectly handling the case where a namespace node was the
6590 first in the parent's child list, and had additional peers (not
6591 the only child, but first in the list of children.)
6593 Code and Data Size: Current core subsystem library sizes are shown
6594 below. These are the code and data sizes for the acpica.lib
6595 produced by the Microsoft Visual C++ 6.0 compiler, and these
6596 values do not include any ACPI driver or OSPM code. The debug
6597 version of the code includes the debug output trace mechanism and
6598 has a much larger code and data size. Note that these values will
6599 vary depending on the efficiency of the compiler and the compiler
6600 options used during generation.
6603 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6604 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6606 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
6607 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
6612 Allow ":" in OS override string (Ducrot Bruno)
6614 Kobject fix (Greg KH)
6617 3 iASL Compiler/Disassembler:
6619 Fixed a problem in the generation of the C source code files (AML
6620 is emitted in C source statements for BIOS inclusion) where the
6621 Ascii dump that appears within a C comment at the end of each line
6622 could cause a compile time error if the AML sequence happens to
6623 have an open comment or close comment sequence embedded.
6626 ----------------------------------------
6627 24 April 2003. Summary of changes for version 20030424.
6630 1) ACPI CA Core Subsystem:
6632 Support for big-endian systems has been implemented. Most of the
6633 support has been invisibly added behind big-endian versions of the
6636 Fixed a problem in AcpiHwDisableGpeBlock() and
6637 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
6638 low level hardware write routine. The offset parameter was
6639 actually eliminated from the low level read/write routines because
6640 they had become obsolete.
6642 Fixed a problem where a handler object was deleted twice during
6643 the removal of a fixed event handler.
6648 A fix for SMP systems with link devices was contributed by
6652 (2.5) Return whether we handled the interrupt in our IRQ handler.
6653 (Linux ISRs no longer return void, so we can propagate the handler
6654 return value from the ACPI CA core back to the OS.)
6660 The ACPI CA Programmer Reference has been updated to reflect new
6661 interfaces and changes to existing interfaces.
6663 ----------------------------------------
6664 28 March 2003. Summary of changes for version 20030328.
6666 1) ACPI CA Core Subsystem:
6668 The GPE Block Device support has been completed. New interfaces
6669 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
6670 interfaces (enable, disable, clear, getstatus) have been split
6671 into separate interfaces for Fixed Events and General Purpose
6672 Events (GPEs) in order to support GPE Block Devices properly.
6674 Fixed a problem where the error message "Failed to acquire
6675 semaphore" would appear during operations on the embedded
6678 Code and Data Size: Current core subsystem library sizes are shown
6679 below. These are the code and data sizes for the acpica.lib
6680 produced by the Microsoft Visual C++ 6.0 compiler, and these
6681 values do not include any ACPI driver or OSPM code. The debug
6682 version of the code includes the debug output trace mechanism and
6683 has a much larger code and data size. Note that these values will
6684 vary depending on the efficiency of the compiler and the compiler
6685 options used during generation.
6688 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6689 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6691 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6692 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6695 ----------------------------------------
6696 28 February 2003. Summary of changes for version 20030228.
6699 1) ACPI CA Core Subsystem:
6701 The GPE handling and dispatch code has been completely overhauled
6702 in preparation for support of GPE Block Devices (ID ACPI0006).
6703 This affects internal data structures and code only; there should
6704 be no differences visible externally. One new file has been
6707 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
6708 fields that are used to determine the GPE block lengths. The
6709 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
6710 structures are ignored. This is per the ACPI specification but it
6711 isn't very clear. The full 256 Block 0/1 GPEs are now supported
6712 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
6714 In the SCI interrupt handler, removed the read of the PM1_CONTROL
6715 register to look at the SCI_EN bit. On some machines, this read
6716 causes an SMI event and greatly slows down SCI events. (This may
6717 in fact be the cause of slow battery status response on some
6720 Fixed a problem where a store of a NULL string to a package object
6721 could cause the premature deletion of the object. This was seen
6722 during execution of the battery _BIF method on some systems,
6723 resulting in no battery data being returned.
6725 Added AcpiWalkResources interface to simplify parsing of resource
6728 Code and Data Size: Current core subsystem library sizes are shown
6729 below. These are the code and data sizes for the acpica.lib
6730 produced by the Microsoft Visual C++ 6.0 compiler, and these
6731 values do not include any ACPI driver or OSPM code. The debug
6732 version of the code includes the debug output trace mechanism and
6733 has a much larger code and data size. Note that these values will
6734 vary depending on the efficiency of the compiler and the compiler
6735 options used during generation.
6738 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6739 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6741 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6742 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6747 S3 fixes (Ole Rohne)
6749 Update ACPI PHP driver with to use new acpi_walk_resource API
6752 Add S4BIOS support (Pavel Machek)
6754 Map in entire table before performing checksum (John Stultz)
6756 Expand the mem= cmdline to allow the specification of reserved and
6757 ACPI DATA blocks (Pavel Machek)
6759 Never use ACPI on VISWS
6761 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
6763 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
6764 causing us to think that some systems support C2 when they really
6767 Do not count processor objects for non-present CPUs (Thanks to
6773 Fixed a problem where ASL include files could not be found and
6776 Added support for the _PDC reserved name.
6779 ----------------------------------------
6780 22 January 2003. Summary of changes for version 20030122.
6783 1) ACPI CA Core Subsystem:
6785 Added a check for constructs of the form: Store (Local0, Local0)
6786 where Local0 is not initialized. Apparently, some BIOS
6787 programmers believe that this is a NOOP. Since this store doesn't
6788 do anything anyway, the new prototype behavior will ignore this
6789 error. This is a case where we can relax the strict checking in
6790 the interpreter in the name of compatibility.
6795 The AcpiSrc Source Conversion Utility has been released with the
6796 Linux package for the first time. This is the utility that is
6797 used to convert the ACPI CA base source code to the Linux version.
6799 (Both) Handle P_BLK lengths shorter than 6 more gracefully
6801 (Both) Move more headers to include/acpi, and delete an unused
6804 (Both) Move drivers/acpi/include directory to include/acpi
6806 (Both) Boot functions don't use cmdline, so don't pass it around
6808 (Both) Remove include of unused header (Adrian Bunk)
6810 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
6812 former now also includes the latter, acpiphp.h only needs the one,
6815 (2.5) Make it possible to select method of bios restoring after S3
6816 resume. [=> no more ugly ifdefs] (Pavel Machek)
6818 (2.5) Make proc write interfaces work (Pavel Machek)
6820 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
6822 (2.5) Break out ACPI Perf code into its own module, under cpufreq
6825 (2.4) S4BIOS support (Ducrot Bruno)
6827 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
6833 Added support to disassemble SSDT and PSDTs.
6835 Implemented support to obtain SSDTs from the Windows registry if
6839 ----------------------------------------
6840 09 January 2003. Summary of changes for version 20030109.
6842 1) ACPI CA Core Subsystem:
6844 Changed the behavior of the internal Buffer-to-String conversion
6845 function. The current ACPI specification states that the contents
6846 of the buffer are "converted to a string of two-character
6847 hexadecimal numbers, each separated by a space". Unfortunately,
6848 this definition is not backwards compatible with existing ACPI 1.0
6849 implementations (although the behavior was not defined in the ACPI
6850 1.0 specification). The new behavior simply copies data from the
6851 buffer to the string until a null character is found or the end of
6852 the buffer is reached. The new String object is always null
6853 terminated. This problem was seen during the generation of _BIF
6854 battery data where incorrect strings were returned for battery
6855 type, etc. This will also require an errata to the ACPI
6858 Renamed all instances of NATIVE_UINT and NATIVE_INT to
6859 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
6861 Copyright in all module headers (both Linux and non-Linux) has be
6864 Code and Data Size: Current core subsystem library sizes are shown
6865 below. These are the code and data sizes for the acpica.lib
6866 produced by the Microsoft Visual C++ 6.0 compiler, and these
6867 values do not include any ACPI driver or OSPM code. The debug
6868 version of the code includes the debug output trace mechanism and
6869 has a much larger code and data size. Note that these values will
6870 vary depending on the efficiency of the compiler and the compiler
6871 options used during generation.
6874 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6875 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6877 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6878 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6883 Fixed an oops on module insertion/removal (Matthew Tippett)
6885 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
6887 (2.5) Replace pr_debug (Randy Dunlap)
6889 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
6891 (Both) Eliminate spawning of thread from timer callback, in favor
6894 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
6896 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
6898 (Both) Add missing statics to button.c (Pavel Machek)
6900 Several changes have been made to the source code translation
6901 utility that generates the Linux Code in order to make the code
6904 All typedefs on structs and unions have been removed in keeping
6905 with the Linux coding style.
6907 Removed the non-Linux SourceSafe module revision number from each
6910 Completed major overhaul of symbols to be lowercased for linux.
6911 Doubled the number of symbols that are lowercased.
6913 Fixed a problem where identifiers within procedure headers and
6914 within quotes were not fully lower cased (they were left with a
6917 Some C macros whose only purpose is to allow the generation of 16-
6918 bit code are now completely removed in the Linux code, increasing
6919 readability and maintainability.
6921 ----------------------------------------
6923 12 December 2002. Summary of changes for version 20021212.
6926 1) ACPI CA Core Subsystem:
6928 Fixed a problem where the creation of a zero-length AML Buffer
6929 would cause a fault.
6931 Fixed a problem where a Buffer object that pointed to a static AML
6932 buffer (in an ACPI table) could inadvertently be deleted, causing
6935 Fixed a problem where a user buffer (passed in to the external
6936 ACPI CA interfaces) could be overwritten if the buffer was too
6937 small to complete the operation, causing memory corruption.
6939 Fixed a problem in the Buffer-to-String conversion code where a
6940 string of length one was always returned, regardless of the size
6941 of the input Buffer object.
6943 Removed the NATIVE_CHAR data type across the entire source due to
6944 lack of need and lack of consistent use.
6946 Code and Data Size: Current core subsystem library sizes are shown
6947 below. These are the code and data sizes for the acpica.lib
6948 produced by the Microsoft Visual C++ 6.0 compiler, and these
6949 values do not include any ACPI driver or OSPM code. The debug
6950 version of the code includes the debug output trace mechanism and
6951 has a much larger code and data size. Note that these values will
6952 vary depending on the efficiency of the compiler and the compiler
6953 options used during generation.
6956 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6957 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6959 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6960 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6963 ----------------------------------------
6964 05 December 2002. Summary of changes for version 20021205.
6966 1) ACPI CA Core Subsystem:
6968 Fixed a problem where a store to a String or Buffer object could
6969 cause corruption of the DSDT if the object type being stored was
6970 the same as the target object type and the length of the object
6971 being stored was equal to or smaller than the original (existing)
6972 target object. This was seen to cause corruption of battery _BIF
6973 buffers if the _BIF method modified the buffer on the fly.
6975 Fixed a problem where an internal error was generated if a control
6976 method invocation was used in an OperationRegion, Buffer, or
6977 Package declaration. This was caused by the deferred parsing of
6978 the control method and thus the deferred creation of the internal
6979 method object. The solution to this problem was to create the
6980 internal method object at the moment the method is encountered in
6981 the first pass - so that subsequent references to the method will
6982 able to obtain the required parameter count and thus properly
6983 parse the method invocation. This problem presented itself as an
6984 AE_AML_INTERNAL during the pass 1 parse phase during table load.
6986 Fixed a problem where the internal String object copy routine did
6987 not always allocate sufficient memory for the target String object
6988 and caused memory corruption. This problem was seen to cause
6989 "Allocation already present in list!" errors as memory allocation
6992 Implemented a new function for the evaluation of namespace objects
6993 that allows the specification of the allowable return object
6994 types. This simplifies a lot of code that checks for a return
6995 object of one or more specific objects returned from the
6996 evaluation (such as _STA, etc.) This may become and external
6997 function if it would be useful to ACPI-related drivers.
6999 Completed another round of prefixing #defines with "ACPI_" for
7002 Completed additional code restructuring to allow more modular
7003 linking for iASL compiler and AcpiExec. Several files were split
7004 creating new files. New files: nsparse.c dsinit.c evgpe.c
7006 Implemented an abort mechanism to terminate an executing control
7007 method via the AML debugger. This feature is useful for debugging
7008 control methods that depend (wait) for specific hardware
7011 Code and Data Size: Current core subsystem library sizes are shown
7012 below. These are the code and data sizes for the acpica.lib
7013 produced by the Microsoft Visual C++ 6.0 compiler, and these
7014 values do not include any ACPI driver or OSPM code. The debug
7015 version of the code includes the debug output trace mechanism and
7016 has a much larger code and data size. Note that these values will
7017 vary depending on the efficiency of the compiler and the compiler
7018 options used during generation.
7021 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7022 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
7024 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
7025 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
7028 2) iASL Compiler/Disassembler
7030 Fixed a compiler code generation problem for "Interrupt" Resource
7031 Descriptors. If specified in the ASL, the optional "Resource
7032 Source Index" and "Resource Source" fields were not inserted into
7033 the correct location within the AML resource descriptor, creating
7034 an invalid descriptor.
7036 Fixed a disassembler problem for "Interrupt" resource descriptors.
7037 The optional "Resource Source Index" and "Resource Source" fields
7041 ----------------------------------------
7042 22 November 2002. Summary of changes for version 20021122.
7045 1) ACPI CA Core Subsystem:
7047 Fixed a reported problem where an object stored to a Method Local
7048 or Arg was not copied to a new object during the store - the
7049 object pointer was simply copied to the Local/Arg. This caused
7050 all subsequent operations on the Local/Arg to also affect the
7051 original source of the store operation.
7053 Fixed a problem where a store operation to a Method Local or Arg
7054 was not completed properly if the Local/Arg contained a reference
7055 (from RefOf) to a named field. The general-purpose store-to-
7056 namespace-node code is now used so that this case is handled
7059 Fixed a problem where the internal object copy routine would cause
7060 a protection fault if the object being copied was a Package and
7061 contained either 1) a NULL package element or 2) a nested sub-
7064 Fixed a problem with the GPE initialization that resulted from an
7065 ambiguity in the ACPI specification. One section of the
7066 specification states that both the address and length of the GPE
7067 block must be zero if the block is not supported. Another section
7068 implies that only the address need be zero if the block is not
7069 supported. The code has been changed so that both the address and
7070 the length must be non-zero to indicate a valid GPE block (i.e.,
7071 if either the address or the length is zero, the GPE block is
7074 Code and Data Size: Current core subsystem library sizes are shown
7075 below. These are the code and data sizes for the acpica.lib
7076 produced by the Microsoft Visual C++ 6.0 compiler, and these
7077 values do not include any ACPI driver or OSPM code. The debug
7078 version of the code includes the debug output trace mechanism and
7079 has a much larger code and data size. Note that these values will
7080 vary depending on the efficiency of the compiler and the compiler
7081 options used during generation.
7084 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
7085 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
7087 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7088 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
7093 Cleaned up EC driver. Exported an external EC read/write
7094 interface. By going through this, other drivers (most notably
7095 sonypi) will be able to serialize access to the EC.
7098 3) iASL Compiler/Disassembler
7100 Implemented support to optionally generate include files for both
7101 ASM and C (the -i switch). This simplifies BIOS development by
7102 automatically creating include files that contain external
7103 declarations for the symbols that are created within the
7105 (optionally generated) ASM and C AML source files.
7108 ----------------------------------------
7109 15 November 2002. Summary of changes for version 20021115.
7111 1) ACPI CA Core Subsystem:
7113 Fixed a memory leak problem where an error during resolution of
7115 method arguments during a method invocation from another method
7116 failed to cleanup properly by deleting all successfully resolved
7119 Fixed a problem where the target of the Index() operator was not
7120 correctly constructed if the source object was a package. This
7121 problem has not been detected because the use of a target operand
7122 with Index() is very rare.
7124 Fixed a problem with the Index() operator where an attempt was
7125 made to delete the operand objects twice.
7127 Fixed a problem where an attempt was made to delete an operand
7128 twice during execution of the CondRefOf() operator if the target
7131 Implemented the first of perhaps several internal create object
7132 functions that create and initialize a specific object type. This
7133 consolidates duplicated code wherever the object is created, thus
7134 shrinking the size of the subsystem.
7136 Implemented improved debug/error messages for errors that occur
7137 during nested method invocations. All executing method pathnames
7138 are displayed (with the error) as the call stack is unwound - thus
7141 Fixed a problem introduced in the 10/02 release that caused
7142 premature deletion of a buffer object if a buffer was used as an
7143 ASL operand where an integer operand is required (Thus causing an
7144 implicit object conversion from Buffer to Integer.) The change in
7145 the 10/02 release was attempting to fix a memory leak (albeit
7148 Code and Data Size: Current core subsystem library sizes are shown
7149 below. These are the code and data sizes for the acpica.lib
7150 produced by the Microsoft Visual C++ 6.0 compiler, and these
7151 values do not include any ACPI driver or OSPM code. The debug
7152 version of the code includes the debug output trace mechanism and
7153 has a much larger code and data size. Note that these values will
7154 vary depending on the efficiency of the compiler and the compiler
7155 options used during generation.
7158 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
7159 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
7161 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
7162 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
7167 Changed the implementation of the ACPI semaphores to use down()
7168 instead of down_interruptable(). It is important that the
7169 execution of ACPI control methods not be interrupted by signals.
7170 Methods must run to completion, or the system may be left in an
7171 unknown/unstable state.
7173 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
7177 3) iASL Compiler/Disassembler
7180 Changed the default location of output files. All output files
7181 are now placed in the current directory by default instead of in
7182 the directory of the source file. This change may affect some
7183 existing makefiles, but it brings the behavior of the compiler in
7184 line with other similar tools. The location of the output files
7185 can be overridden with the -p command line switch.
7188 ----------------------------------------
7189 11 November 2002. Summary of changes for version 20021111.
7192 0) ACPI Specification 2.0B is released and is now available at:
7193 http://www.acpi.info/index.html
7196 1) ACPI CA Core Subsystem:
7198 Implemented support for the ACPI 2.0 SMBus Operation Regions.
7199 This includes the early detection and handoff of the request to
7200 the SMBus region handler (avoiding all of the complex field
7201 support code), and support for the bidirectional return packet
7202 from an SMBus write operation. This paves the way for the
7203 development of SMBus drivers in each host operating system.
7205 Fixed a problem where the semaphore WAIT_FOREVER constant was
7206 defined as 32 bits, but must be 16 bits according to the ACPI
7207 specification. This had the side effect of causing ASL
7208 Mutex/Event timeouts even though the ASL code requested a wait
7209 forever. Changed all internal references to the ACPI timeout
7210 parameter to 16 bits to prevent future problems. Changed the name
7211 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
7213 Code and Data Size: Current core subsystem library sizes are shown
7214 below. These are the code and data sizes for the acpica.lib
7215 produced by the Microsoft Visual C++ 6.0 compiler, and these
7216 values do not include any ACPI driver or OSPM code. The debug
7217 version of the code includes the debug output trace mechanism and
7218 has a much larger code and data size. Note that these values will
7219 vary depending on the efficiency of the compiler and the compiler
7220 options used during generation.
7223 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7224 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
7226 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
7227 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
7232 Module loading/unloading fixes (John Cagle)
7235 3) iASL Compiler/Disassembler
7237 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
7239 Implemented support for the disassembly of all SMBus protocol
7240 keywords (SMBQuick, SMBWord, etc.)
7242 ----------------------------------------
7243 01 November 2002. Summary of changes for version 20021101.
7246 1) ACPI CA Core Subsystem:
7248 Fixed a problem where platforms that have a GPE1 block but no GPE0
7249 block were not handled correctly. This resulted in a "GPE
7250 overlap" error message. GPE0 is no longer required.
7252 Removed code added in the previous release that inserted nodes
7253 into the namespace in alphabetical order. This caused some side-
7254 effects on various machines. The root cause of the problem is
7255 still under investigation since in theory, the internal ordering
7256 of the namespace nodes should not matter.
7259 Enhanced error reporting for the case where a named object is not
7260 found during control method execution. The full ACPI namepath
7261 (name reference) of the object that was not found is displayed in
7264 Note: as a result of the overhaul of the namespace object types in
7265 the previous release, the namespace nodes for the predefined
7266 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
7267 instead of ACPI_TYPE_ANY. This simplifies the namespace
7268 management code but may affect code that walks the namespace tree
7269 looking for specific object types.
7271 Code and Data Size: Current core subsystem library sizes are shown
7272 below. These are the code and data sizes for the acpica.lib
7273 produced by the Microsoft Visual C++ 6.0 compiler, and these
7274 values do not include any ACPI driver or OSPM code. The debug
7275 version of the code includes the debug output trace mechanism and
7276 has a much larger code and data size. Note that these values will
7277 vary depending on the efficiency of the compiler and the compiler
7278 options used during generation.
7281 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
7282 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
7284 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7285 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
7290 Fixed a problem introduced in the previous release where the
7291 Processor and Thermal objects were not recognized and installed in
7292 /proc. This was related to the scope type change described above.
7295 3) iASL Compiler/Disassembler
7297 Implemented the -g option to get all of the required ACPI tables
7298 from the registry and save them to files (Windows version of the
7299 compiler only.) The required tables are the FADT, FACS, and DSDT.
7301 Added ACPI table checksum validation during table disassembly in
7302 order to catch corrupted tables.
7305 ----------------------------------------
7306 22 October 2002. Summary of changes for version 20021022.
7308 1) ACPI CA Core Subsystem:
7310 Implemented a restriction on the Scope operator that the target
7311 must already exist in the namespace at the time the operator is
7312 encountered (during table load or method execution). In other
7313 words, forward references are not allowed and Scope() cannot
7314 create a new object. This changes the previous behavior where the
7315 interpreter would create the name if not found. This new behavior
7316 correctly enables the search-to-root algorithm during namespace
7317 lookup of the target name. Because of this upsearch, this fixes
7318 the known Compaq _SB_.OKEC problem and makes both the AML
7319 interpreter and iASL compiler compatible with other ACPI
7322 Completed a major overhaul of the internal ACPI object types for
7323 the ACPI Namespace and the associated operand objects. Many of
7324 these types had become obsolete with the introduction of the two-
7325 pass namespace load. This cleanup simplifies the code and makes
7326 the entire namespace load mechanism much clearer and easier to
7329 Improved debug output for tracking scope opening/closing to help
7330 diagnose scoping issues. The old scope name as well as the new
7331 scope name are displayed. Also improved error messages for
7332 problems with ASL Mutex objects and error messages for GPE
7335 Cleaned up the namespace dump code, removed obsolete code.
7337 All string output (for all namespace/object dumps) now uses the
7338 common ACPI string output procedure which handles escapes properly
7339 and does not emit non-printable characters.
7341 Fixed some issues with constants in the 64-bit version of the
7342 local C library (utclib.c)
7347 EC Driver: No longer attempts to acquire the Global Lock at
7351 3) iASL Compiler/Disassembler
7353 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
7354 2 opcodes outside of a control method. This means that the
7355 "executable" operators (versus the "namespace" operators) cannot
7356 be used at the table level; they can only be used within a control
7359 Implemented the restriction on the Scope() operator where the
7360 target must already exist in the namespace at the time the
7361 operator is encountered (during ASL compilation). In other words,
7362 forward references are not allowed and Scope() cannot create a new
7363 object. This makes the iASL compiler compatible with other ACPI
7364 implementations and makes the Scope() implementation adhere to the
7367 Fixed a problem where namepath optimization for the Alias operator
7368 was optimizing the wrong path (of the two namepaths.) This caused
7369 a "Missing alias link" error message.
7371 Fixed a problem where an "unknown reserved name" warning could be
7372 incorrectly generated for names like "_SB" when the trailing
7373 underscore is not used in the original ASL.
7375 Fixed a problem where the reserved name check did not handle
7376 NamePaths with multiple NameSegs correctly. The first nameseg of
7377 the NamePath was examined instead of the last NameSeg.
7380 ----------------------------------------
7382 02 October 2002. Summary of changes for this release.
7385 1) ACPI CA Core Subsystem version 20021002:
7387 Fixed a problem where a store/copy of a string to an existing
7388 string did not always set the string length properly in the String
7391 Fixed a reported problem with the ToString operator where the
7392 behavior was identical to the ToHexString operator instead of just
7393 simply converting a raw buffer to a string data type.
7395 Fixed a problem where CopyObject and the other "explicit"
7396 conversion operators were not updating the internal namespace node
7397 type as part of the store operation.
7399 Fixed a memory leak during implicit source operand conversion
7400 where the original object was not deleted if it was converted to a
7401 new object of a different type.
7403 Enhanced error messages for all problems associated with namespace
7404 lookups. Common procedure generates and prints the lookup name as
7405 well as the formatted status.
7407 Completed implementation of a new design for the Alias support
7408 within the namespace. The existing design did not handle the case
7409 where a new object was assigned to one of the two names due to the
7410 use of an explicit conversion operator, resulting in the two names
7411 pointing to two different objects. The new design simply points
7412 the Alias name to the original name node - not to the object.
7413 This results in a level of indirection that must be handled in the
7414 name resolution mechanism.
7416 Code and Data Size: Current core subsystem library sizes are shown
7417 below. These are the code and data sizes for the acpica.lib
7418 produced by the Microsoft Visual C++ 6.0 compiler, and these
7419 values do not include any ACPI driver or OSPM code. The debug
7420 version of the code includes the debug output trace mechanism and
7421 has a larger code and data size. Note that these values will vary
7422 depending on the efficiency of the compiler and the compiler
7423 options used during generation.
7426 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7427 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7429 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
7430 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
7435 Initialize thermal driver's timer before it is used. (Knut
7438 Allow handling negative celsius values. (Kochi Takayoshi)
7440 Fix thermal management and make trip points. R/W (Pavel Machek)
7442 Fix /proc/acpi/sleep. (P. Christeas)
7444 IA64 fixes. (David Mosberger)
7446 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
7448 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
7452 3) iASL Compiler/Disassembler
7454 Clarified some warning/error messages.
7457 ----------------------------------------
7458 18 September 2002. Summary of changes for this release.
7461 1) ACPI CA Core Subsystem version 20020918:
7463 Fixed a reported problem with reference chaining (via the Index()
7464 and RefOf() operators) in the ObjectType() and SizeOf() operators.
7465 The definition of these operators includes the dereferencing of
7466 all chained references to return information on the base object.
7468 Fixed a problem with stores to indexed package elements - the
7469 existing code would not complete the store if an "implicit
7470 conversion" was not performed. In other words, if the existing
7471 object (package element) was to be replaced completely, the code
7472 didn't handle this case.
7474 Relaxed typechecking on the ASL "Scope" operator to allow the
7475 target name to refer to an object of type Integer, String, or
7476 Buffer, in addition to the scoping object types (Device,
7477 predefined Scopes, Processor, PowerResource, and ThermalZone.)
7478 This allows existing AML code that has workarounds for a bug in
7479 Windows to function properly. A warning is issued, however. This
7480 affects both the AML interpreter and the iASL compiler. Below is
7481 an example of this type of ASL code:
7487 Fixed some reported problems with 64-bit integer support in the
7488 local implementation of C library functions (clib.c)
7493 Use ACPI fix map region instead of IOAPIC region, since it is
7494 undefined in non-SMP.
7496 Ensure that the SCI has the proper polarity and trigger, even on
7497 systems that do not have an interrupt override entry in the MADT.
7499 2.5 big driver reorganization (Pat Mochel)
7501 Use early table mapping code from acpitable.c (Andi Kleen)
7503 New blacklist entries (Andi Kleen)
7505 Blacklist improvements. Split blacklist code out into a separate
7506 file. Move checking the blacklist to very early. Previously, we
7507 would use ACPI tables, and then halfway through init, check the
7508 blacklist -- too late. Now, it's early enough to completely fall-
7512 3) iASL Compiler/Disassembler version 20020918:
7514 Fixed a problem where the typechecking code didn't know that an
7515 alias could point to a method. In other words, aliases were not
7516 being dereferenced during typechecking.
7519 ----------------------------------------
7520 29 August 2002. Summary of changes for this release.
7522 1) ACPI CA Core Subsystem Version 20020829:
7524 If the target of a Scope() operator already exists, it must be an
7525 object type that actually opens a scope -- such as a Device,
7526 Method, Scope, etc. This is a fatal runtime error. Similar error
7527 check has been added to the iASL compiler also.
7529 Tightened up the namespace load to disallow multiple names in the
7530 same scope. This previously was allowed if both objects were of
7531 the same type. (i.e., a lookup was the same as entering a new
7537 Ensure that the ACPI interrupt has the proper trigger and
7540 local_irq_disable is extraneous. (Matthew Wilcox)
7542 Make "acpi=off" actually do what it says, and not use the ACPI
7543 interpreter *or* the tables.
7545 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
7549 3) iASL Compiler/Disassembler Version 20020829:
7551 Implemented namepath optimization for name declarations. For
7552 example, a declaration like "Method (\_SB_.ABCD)" would get
7553 optimized to "Method (ABCD)" if the declaration is within the
7554 \_SB_ scope. This optimization is in addition to the named
7555 reference path optimization first released in the previous
7556 version. This would seem to complete all possible optimizations
7557 for namepaths within the ASL/AML.
7559 If the target of a Scope() operator already exists, it must be an
7560 object type that actually opens a scope -- such as a Device,
7563 Implemented a check and warning for unreachable code in the same
7564 block below a Return() statement.
7566 Fixed a problem where the listing file was not generated if the
7567 compiler aborted if the maximum error count was exceeded (200).
7569 Fixed a problem where the typechecking of method return values was
7570 broken. This includes the check for a return value when the
7571 method is invoked as a TermArg (a return value is expected.)
7573 Fixed a reported problem where EOF conditions during a quoted
7574 string or comment caused a fault.
7577 ----------------------------------------
7578 15 August 2002. Summary of changes for this release.
7580 1) ACPI CA Core Subsystem Version 20020815:
7582 Fixed a reported problem where a Store to a method argument that
7583 contains a reference did not perform the indirect store correctly.
7584 This problem was created during the conversion to the new
7585 reference object model - the indirect store to a method argument
7586 code was not updated to reflect the new model.
7588 Reworked the ACPI mode change code to better conform to ACPI 2.0,
7589 handle corner cases, and improve code legibility (Kochi Takayoshi)
7591 Fixed a problem with the pathname parsing for the carat (^)
7592 prefix. The heavy use of the carat operator by the new namepath
7593 optimization in the iASL compiler uncovered a problem with the AML
7594 interpreter handling of this prefix. In the case where one or
7595 more carats precede a single nameseg, the nameseg was treated as
7596 standalone and the search rule (to root) was inadvertently
7597 applied. This could cause both the iASL compiler and the
7598 interpreter to find the wrong object or to miss the error that
7599 should occur if the object does not exist at that exact pathname.
7601 Found and fixed the problem where the HP Pavilion DSDT would not
7602 load. This was a relatively minor tweak to the table loading code
7603 (a problem caused by the unexpected encounter with a method
7604 invocation not within a control method), but it does not solve the
7605 overall issue of the execution of AML code at the table level.
7606 This investigation is still ongoing.
7608 Code and Data Size: Current core subsystem library sizes are shown
7609 below. These are the code and data sizes for the acpica.lib
7610 produced by the Microsoft Visual C++ 6.0 compiler, and these
7611 values do not include any ACPI driver or OSPM code. The debug
7612 version of the code includes the debug output trace mechanism and
7613 has a larger code and data size. Note that these values will vary
7614 depending on the efficiency of the compiler and the compiler
7615 options used during generation.
7618 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7619 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7621 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7622 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7627 Remove redundant slab.h include (Brad Hards)
7629 Fix several bugs in thermal.c (Herbert Nachtnebel)
7631 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
7633 Change acpi_system_suspend to use updated irq functions (Pavel
7636 Export acpi_get_firmware_table (Matthew Wilcox)
7638 Use proper root proc entry for ACPI (Kochi Takayoshi)
7640 Fix early-boot table parsing (Bjorn Helgaas)
7643 3) iASL Compiler/Disassembler
7645 Reworked the compiler options to make them more consistent and to
7646 use two-letter options where appropriate. We were running out of
7647 sensible letters. This may break some makefiles, so check the
7648 current options list by invoking the compiler with no parameters.
7650 Completed the design and implementation of the ASL namepath
7651 optimization option for the compiler. This option optimizes all
7652 references to named objects to the shortest possible path. The
7653 first attempt tries to utilize a single nameseg (4 characters) and
7654 the "search-to-root" algorithm used by the interpreter. If that
7655 cannot be used (because either the name is not in the search path
7656 or there is a conflict with another object with the same name),
7657 the pathname is optimized using the carat prefix (usually a
7658 shorter string than specifying the entire path from the root.)
7660 Implemented support to obtain the DSDT from the Windows registry
7661 (when the disassembly option is specified with no input file).
7662 Added this code as the implementation for AcpiOsTableOverride in
7663 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
7664 utility) to scan memory for the DSDT to the AcpiOsTableOverride
7665 function in the DOS OSL to make the disassembler truly OS
7668 Implemented a new option to disassemble and compile in one step.
7669 When used without an input filename, this option will grab the
7670 DSDT from the local machine, disassemble it, and compile it in one
7673 Added a warning message for invalid escapes (a backslash followed
7674 by any character other than the allowable escapes). This catches
7675 the quoted string error "\_SB_" (which should be "\\_SB_" ).
7677 Also, there are numerous instances in the ACPI specification where
7680 Added a compiler option to disable all optimizations. This is
7681 basically the "compatibility mode" because by using this option,
7682 the AML code will come out exactly the same as other ASL
7685 Added error messages for incorrectly ordered dependent resource
7686 functions. This includes: missing EndDependentFn macro at end of
7687 dependent resource list, nested dependent function macros (both
7688 start and end), and missing StartDependentFn macro. These are
7689 common errors that should be caught at compile time.
7691 Implemented _OSI support for the disassembler and compiler. _OSI
7692 must be included in the namespace for proper disassembly (because
7693 the disassembler must know the number of arguments.)
7695 Added an "optimization" message type that is optional (off by
7696 default). This message is used for all optimizations - including
7697 constant folding, integer optimization, and namepath optimization.
7699 ----------------------------------------
7700 25 July 2002. Summary of changes for this release.
7703 1) ACPI CA Core Subsystem Version 20020725:
7705 The AML Disassembler has been enhanced to produce compilable ASL
7706 code and has been integrated into the iASL compiler (see below) as
7707 well as the single-step disassembly for the AML debugger and the
7708 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
7709 resource templates and macros are fully supported. The
7710 disassembler has been tested on over 30 different AML files,
7711 producing identical AML when the resulting disassembled ASL file
7712 is recompiled with the same ASL compiler.
7714 Modified the Resource Manager to allow zero interrupts and zero
7715 dma channels during the GetCurrentResources call. This was
7716 causing problems on some platforms.
7718 Added the AcpiOsRedirectOutput interface to the OSL to simplify
7719 output redirection for the AcpiOsPrintf and AcpiOsVprintf
7722 Code and Data Size: Current core subsystem library sizes are shown
7723 below. These are the code and data sizes for the acpica.lib
7724 produced by the Microsoft Visual C++ 6.0 compiler, and these
7725 values do not include any ACPI driver or OSPM code. The debug
7726 version of the code includes the debug output trace mechanism and
7727 has a larger code and data size. Note that these values will vary
7728 depending on the efficiency of the compiler and the compiler
7729 options used during generation.
7732 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7733 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7735 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7736 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7741 Fixed a panic in the EC driver (Dominik Brodowski)
7743 Implemented checksum of the R/XSDT itself during Linux table scan
7749 The AML disassembler is integrated into the compiler. The "-d"
7750 option invokes the disassembler to completely disassemble an
7751 input AML file, producing as output a text ASL file with the
7752 extension ".dsl" (to avoid name collisions with existing .asl
7753 source files.) A future enhancement will allow the disassembler
7754 to obtain the BIOS DSDT from the registry under Windows.
7756 Fixed a problem with the VendorShort and VendorLong resource
7757 descriptors where an invalid AML sequence was created.
7759 Implemented a fix for BufferData term in the ASL parser. It was
7760 inadvertently defined twice, allowing invalid syntax to pass and
7761 causing reduction conflicts.
7763 Fixed a problem where the Ones opcode could get converted to a
7764 value of zero if "Ones" was used where a byte, word or dword value
7765 was expected. The 64-bit value is now truncated to the correct
7766 size with the correct value.
7770 ----------------------------------------
7771 02 July 2002. Summary of changes for this release.
7774 1) ACPI CA Core Subsystem Version 20020702:
7776 The Table Manager code has been restructured to add several new
7777 features. Tables that are not required by the core subsystem
7778 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
7779 validated in any way and are returned from AcpiGetFirmwareTable if
7780 requested. The AcpiOsTableOverride interface is now called for
7781 each table that is loaded by the subsystem in order to allow the
7782 host to override any table it chooses. Previously, only the DSDT
7783 could be overridden. Added one new files, tbrsdt.c and
7786 Fixed a problem with the conversion of internal package objects to
7787 external objects (when a package is returned from a control
7788 method.) The return buffer length was set to zero instead of the
7789 proper length of the package object.
7791 Fixed a reported problem with the use of the RefOf and DeRefOf
7792 operators when passing reference arguments to control methods. A
7793 new type of Reference object is used internally for references
7794 produced by the RefOf operator.
7796 Added additional error messages in the Resource Manager to explain
7797 AE_BAD_DATA errors when they occur during resource parsing.
7799 Split the AcpiEnableSubsystem into two primitives to enable a
7800 finer granularity initialization sequence. These two calls should
7801 be called in this order: AcpiEnableSubsystem (flags),
7802 AcpiInitializeObjects (flags). The flags parameter remains the
7808 Updated the ACPI utilities module to understand the new style of
7809 fully resolved package objects that are now returned from the core
7810 subsystem. This eliminates errors of the form:
7812 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
7813 acpi_utils-0430 [145] acpi_evaluate_reference:
7814 Invalid element in package (not a device reference)
7816 The method evaluation utility uses the new buffer allocation
7817 scheme instead of calling AcpiEvaluate Object twice.
7819 Added support for ECDT. This allows the use of the Embedded
7821 Controller before the namespace has been fully initialized, which
7822 is necessary for ACPI 2.0 support, and for some laptops to
7823 initialize properly. (Laptops using ECDT are still rare, so only
7824 limited testing was performed of the added functionality.)
7826 Fixed memory leaks in the EC driver.
7828 Eliminated a brittle code structure in acpi_bus_init().
7830 Eliminated the acpi_evaluate() helper function in utils.c. It is
7831 no longer needed since acpi_evaluate_object can optionally
7832 allocate memory for the return object.
7834 Implemented fix for keyboard hang when getting battery readings on
7835 some systems (Stephen White)
7837 PCI IRQ routing update (Dominik Brodowski)
7839 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
7842 ----------------------------------------
7843 11 June 2002. Summary of changes for this release.
7846 1) ACPI CA Core Subsystem Version 20020611:
7848 Fixed a reported problem where constants such as Zero and One
7849 appearing within _PRT packages were not handled correctly within
7850 the resource manager code. Originally reported against the ASL
7851 compiler because the code generator now optimizes integers to
7852 their minimal AML representation (i.e. AML constants if possible.)
7853 The _PRT code now handles all AML constant opcodes correctly
7854 (Zero, One, Ones, Revision).
7856 Fixed a problem with the Concatenate operator in the AML
7857 interpreter where a buffer result object was incorrectly marked as
7858 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
7860 All package sub-objects are now fully resolved before they are
7861 returned from the external ACPI interfaces. This means that name
7862 strings are resolved to object handles, and constant operators
7863 (Zero, One, Ones, Revision) are resolved to Integers.
7865 Implemented immediate resolution of the AML Constant opcodes
7866 (Zero, One, Ones, Revision) to Integer objects upon detection
7867 within the AML stream. This has simplified and reduced the
7868 generated code size of the subsystem by eliminating about 10
7869 switch statements for these constants (which previously were
7870 contained in Reference objects.) The complicating issues are that
7871 the Zero opcode is used as a "placeholder" for unspecified
7872 optional target operands and stores to constants are defined to be
7875 Code and Data Size: Current core subsystem library sizes are shown
7876 below. These are the code and data sizes for the acpica.lib
7877 produced by the Microsoft Visual C++ 6.0 compiler, and these
7878 values do not include any ACPI driver or OSPM code. The debug
7879 version of the code includes the debug output trace mechanism and
7880 has a larger code and data size. Note that these values will vary
7881 depending on the efficiency of the compiler and the compiler
7882 options used during generation.
7885 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7886 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7888 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7889 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7895 Added preliminary support for obtaining _TRA data for PCI root
7896 bridges (Bjorn Helgaas).
7899 3) iASL Compiler Version X2046:
7901 Fixed a problem where the "_DDN" reserved name was defined to be a
7902 control method with one argument. There are no arguments, and
7903 _DDN does not have to be a control method.
7905 Fixed a problem with the Linux version of the compiler where the
7906 source lines printed with error messages were the wrong lines.
7907 This turned out to be the "LF versus CR/LF" difference between
7908 Windows and Unix. This appears to be the longstanding issue
7909 concerning listing output and error messages.
7911 Fixed a problem with the Linux version of compiler where opcode
7912 names within error messages were wrong. This was caused by a
7913 slight difference in the output of the Flex tool on Linux versus
7916 Fixed a problem with the Linux compiler where the hex output files
7917 contained some garbage data caused by an internal buffer overrun.
7920 ----------------------------------------
7921 17 May 2002. Summary of changes for this release.
7924 1) ACPI CA Core Subsystem Version 20020517:
7926 Implemented a workaround to an BIOS bug discovered on the HP
7927 OmniBook where the FADT revision number and the table size are
7928 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
7929 behavior is to fallback to using only the ACPI 1.0 fields of the
7930 FADT if the table is too small to be a ACPI 2.0 table as claimed
7931 by the revision number. Although this is a BIOS bug, this is a
7932 case where the workaround is simple enough and with no side
7933 effects, so it seemed prudent to add it. A warning message is
7936 Implemented minimum size checks for the fixed-length ACPI tables -
7937 - the FADT and FACS, as well as consistency checks between the
7938 revision number and the table size.
7940 Fixed a reported problem in the table override support where the
7941 new table pointer was incorrectly treated as a physical address
7942 instead of a logical address.
7944 Eliminated the use of the AE_AML_ERROR exception and replaced it
7945 with more descriptive codes.
7947 Fixed a problem where an exception would occur if an ASL Field was
7948 defined with no named Field Units underneath it (used by some
7951 Code and Data Size: Current core subsystem library sizes are shown
7952 below. These are the code and data sizes for the acpica.lib
7953 produced by the Microsoft Visual C++ 6.0 compiler, and these
7954 values do not include any ACPI driver or OSPM code. The debug
7955 version of the code includes the debug output trace mechanism and
7956 has a larger code and data size. Note that these values will vary
7957 depending on the efficiency of the compiler and the compiler
7958 options used during generation.
7961 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7962 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7964 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7965 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7971 Much work done on ACPI init (MADT and PCI IRQ routing support).
7972 (Paul D. and Dominik Brodowski)
7974 Fix PCI IRQ-related panic on boot (Sam Revitch)
7976 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
7978 Fix "MHz" typo (Dominik Brodowski)
7980 Fix RTC year 2000 issue (Dominik Brodowski)
7982 Preclude multiple button proc entries (Eric Brunet)
7984 Moved arch-specific code out of include/platform/aclinux.h
7986 3) iASL Compiler Version X2044:
7988 Implemented error checking for the string used in the EISAID macro
7989 (Usually used in the definition of the _HID object.) The code now
7990 strictly enforces the PnP format - exactly 7 characters, 3
7991 uppercase letters and 4 hex digits.
7993 If a raw string is used in the definition of the _HID object
7994 (instead of the EISAID macro), the string must contain all
7995 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7998 Implemented checking for invalid use of ACPI reserved names for
7999 most of the name creation operators (Name, Device, Event, Mutex,
8000 OperationRegion, PowerResource, Processor, and ThermalZone.)
8001 Previously, this check was only performed for control methods.
8003 Implemented an additional check on the Name operator to emit an
8004 error if a reserved name that must be implemented in ASL as a
8005 control method is used. We know that a reserved name must be a
8006 method if it is defined with input arguments.
8008 The warning emitted when a namespace object reference is not found
8009 during the cross reference phase has been changed into an error.
8010 The "External" directive should be used for names defined in other
8014 4) Tools and Utilities
8016 The 16-bit tools (adump16 and aexec16) have been regenerated and
8019 Fixed a problem with the output of both acpidump and adump16 where
8020 the indentation of closing parentheses and brackets was not
8022 aligned properly with the parent block.
8025 ----------------------------------------
8026 03 May 2002. Summary of changes for this release.
8029 1) ACPI CA Core Subsystem Version 20020503:
8031 Added support a new OSL interface that allows the host operating
8033 system software to override the DSDT found in the firmware -
8034 AcpiOsTableOverride. With this interface, the OSL can examine the
8035 version of the firmware DSDT and replace it with a different one
8038 Added new external interfaces for accessing ACPI registers from
8039 device drivers and other system software - AcpiGetRegister and
8040 AcpiSetRegister. This was simply an externalization of the
8041 existing AcpiHwBitRegister interfaces.
8043 Fixed a regression introduced in the previous build where the
8044 ASL/AML CreateField operator always returned an error,
8045 "destination must be a NS Node".
8047 Extended the maximum time (before failure) to successfully enable
8048 ACPI mode to 3 seconds.
8050 Code and Data Size: Current core subsystem library sizes are shown
8051 below. These are the code and data sizes for the acpica.lib
8052 produced by the Microsoft Visual C++ 6.0 compiler, and these
8053 values do not include any ACPI driver or OSPM code. The debug
8054 version of the code includes the debug output trace mechanism and
8055 has a larger code and data size. Note that these values will vary
8056 depending on the efficiency of the compiler and the compiler
8057 options used during generation.
8060 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
8061 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
8063 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
8064 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
8069 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
8070 free. While 3 out of 4 of our in-house systems work fine, the last
8071 one still hangs when testing the LAPIC timer.
8073 Renamed many files in 2.5 kernel release to omit "acpi_" from the
8076 Added warning on boot for Presario 711FR.
8078 Sleep improvements (Pavel Machek)
8080 ACPI can now be built without CONFIG_PCI enabled.
8082 IA64: Fixed memory map functions (JI Lee)
8085 3) iASL Compiler Version X2043:
8087 Added support to allow the compiler to be integrated into the MS
8088 VC++ development environment for one-button compilation of single
8089 files or entire projects -- with error-to-source-line mapping.
8091 Implemented support for compile-time constant folding for the
8092 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
8093 specification. This allows the ASL writer to use expressions
8094 instead of Integer/Buffer/String constants in terms that must
8095 evaluate to constants at compile time and will also simplify the
8096 emitted AML in any such sub-expressions that can be folded
8097 (evaluated at compile-time.) This increases the size of the
8098 compiler significantly because a portion of the ACPI CA AML
8099 interpreter is included within the compiler in order to pre-
8100 evaluate constant expressions.
8103 Fixed a problem with the "Unicode" ASL macro that caused the
8104 compiler to fault. (This macro is used in conjunction with the
8105 _STR reserved name.)
8107 Implemented an AML opcode optimization to use the Zero, One, and
8108 Ones opcodes where possible to further reduce the size of integer
8109 constants and thus reduce the overall size of the generated AML
8112 Implemented error checking for new reserved terms for ACPI version
8115 Implemented the -qr option to display the current list of ACPI
8116 reserved names known to the compiler.
8118 Implemented the -qc option to display the current list of ASL
8119 operators that are allowed within constant expressions and can
8120 therefore be folded at compile time if the operands are constants.
8125 Updated the Programmer's Reference for new interfaces, data types,
8126 and memory allocation model options.
8128 Updated the iASL Compiler User Reference to apply new format and
8129 add information about new features and options.
8131 ----------------------------------------
8132 19 April 2002. Summary of changes for this release.
8134 1) ACPI CA Core Subsystem Version 20020419:
8136 The source code base for the Core Subsystem has been completely
8137 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
8138 versions. The Lint option files used are included in the
8139 /acpi/generate/lint directory.
8141 Implemented enhanced status/error checking across the entire
8142 Hardware manager subsystem. Any hardware errors (reported from
8143 the OSL) are now bubbled up and will abort a running control
8147 Fixed a problem where the per-ACPI-table integer width (32 or 64)
8148 was stored only with control method nodes, causing a fault when
8149 non-control method code was executed during table loading. The
8150 solution implemented uses a global variable to indicate table
8151 width across the entire ACPI subsystem. Therefore, ACPI CA does
8152 not support mixed integer widths across different ACPI tables
8155 Fixed a problem where NULL extended fields (X fields) in an ACPI
8156 2.0 ACPI FADT caused the table load to fail. Although the
8157 existing ACPI specification is a bit fuzzy on this topic, the new
8158 behavior is to fall back on a ACPI 1.0 field if the corresponding
8159 ACPI 2.0 X field is zero (even though the table revision indicates
8160 a full ACPI 2.0 table.) The ACPI specification will be updated to
8163 Fixed a problem with the SystemMemory operation region handler
8164 where memory was always accessed byte-wise even if the AML-
8165 specified access width was larger than a byte. This caused
8166 problems on systems with memory-mapped I/O. Memory is now
8167 accessed with the width specified. On systems that do not support
8168 non-aligned transfers, a check is made to guarantee proper address
8169 alignment before proceeding in order to avoid an AML-caused
8170 alignment fault within the kernel.
8173 Fixed a problem with the ExtendedIrq resource where only one byte
8174 of the 4-byte Irq field was extracted.
8176 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
8177 function was out of date and required a rewrite.
8179 Code and Data Size: Current core subsystem library sizes are shown
8180 below. These are the code and data sizes for the acpica.lib
8181 produced by the Microsoft Visual C++ 6.0 compiler, and these
8182 values do not include any ACPI driver or OSPM code. The debug
8183 version of the code includes the debug output trace mechanism and
8184 has a larger code and data size. Note that these values will vary
8185 depending on the efficiency of the compiler and the compiler
8186 options used during generation.
8189 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
8190 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
8192 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
8193 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
8198 PCI IRQ routing fixes (Dominik Brodowski)
8201 3) iASL Compiler Version X2042:
8203 Implemented an additional compile-time error check for a field
8204 unit whose size + minimum access width would cause a run-time
8205 access beyond the end-of-region. Previously, only the field size
8208 The Core subsystem and iASL compiler now share a common parse
8209 object in preparation for compile-time evaluation of the type
8210 3/4/5 ASL operators.
8213 ----------------------------------------
8214 Summary of changes for this release: 03_29_02
8216 1) ACPI CA Core Subsystem Version 20020329:
8218 Implemented support for late evaluation of TermArg operands to
8219 Buffer and Package objects. This allows complex expressions to be
8220 used in the declarations of these object types.
8222 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
8223 1.0, if the field was larger than 32 bits, it was returned as a
8224 buffer - otherwise it was returned as an integer. In ACPI 2.0,
8225 the field is returned as a buffer only if the field is larger than
8226 64 bits. The TableRevision is now considered when making this
8227 conversion to avoid incompatibility with existing ASL code.
8229 Implemented logical addressing for AcpiOsGetRootPointer. This
8230 allows an RSDP with either a logical or physical address. With
8231 this support, the host OS can now override all ACPI tables with
8232 one logical RSDP. Includes implementation of "typed" pointer
8233 support to allow a common data type for both physical and logical
8234 pointers internally. This required a change to the
8235 AcpiOsGetRootPointer interface.
8237 Implemented the use of ACPI 2.0 Generic Address Structures for all
8238 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
8239 mapped I/O for these ACPI features.
8241 Initialization now ignores not only non-required tables (All
8242 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
8243 not validate the table headers of unrecognized tables.
8245 Fixed a problem where a notify handler could only be
8246 installed/removed on an object of type Device. All "notify"
8248 objects are now supported -- Devices, Processor, Power, and
8251 Removed most verbosity from the ACPI_DB_INFO debug level. Only
8252 critical information is returned when this debug level is enabled.
8254 Code and Data Size: Current core subsystem library sizes are shown
8255 below. These are the code and data sizes for the acpica.lib
8256 produced by the Microsoft Visual C++ 6.0 compiler, and these
8257 values do not include any ACPI driver or OSPM code. The debug
8258 version of the code includes the debug output trace mechanism and
8259 has a larger code and data size. Note that these values will vary
8260 depending on the efficiency of the compiler and the compiler
8261 options used during generation.
8264 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
8265 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
8267 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
8268 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
8273 The processor driver (acpi_processor.c) now fully supports ACPI
8274 2.0-based processor performance control (e.g. Intel(R)
8275 SpeedStep(TM) technology) Note that older laptops that only have
8276 the Intel "applet" interface are not supported through this. The
8277 'limit' and 'performance' interface (/proc) are fully functional.
8278 [Note that basic policy for controlling performance state
8279 transitions will be included in the next version of ospmd.] The
8280 idle handler was modified to more aggressively use C2, and PIIX4
8281 errata handling underwent a complete overhaul (big thanks to
8284 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
8285 based devices in the ACPI namespace are now dynamically bound
8286 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
8287 This allows, among other things, ACPI to resolve bus numbers for
8288 subordinate PCI bridges.
8290 Enhanced PCI IRQ routing to get the proper bus number for _PRT
8291 entries defined underneath PCI bridges.
8293 Added IBM 600E to bad bios list due to invalid _ADR value for
8294 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
8296 In the process of adding full MADT support (e.g. IOAPIC) for IA32
8297 (acpi.c, mpparse.c) -- stay tuned.
8299 Added back visual differentiation between fixed-feature and
8300 control-method buttons in dmesg. Buttons are also subtyped (e.g.
8301 button/power/PWRF) to simplify button identification.
8303 We no longer use -Wno-unused when compiling debug. Please ignore
8304 any "_THIS_MODULE defined but not used" messages.
8306 Can now shut down the system using "magic sysrq" key.
8309 3) iASL Compiler version 2041:
8311 Fixed a problem where conversion errors for hex/octal/decimal
8312 constants were not reported.
8314 Implemented a fix for the General Register template Address field.
8315 This field was 8 bits when it should be 64.
8317 Fixed a problem where errors/warnings were no longer being emitted
8318 within the listing output file.
8320 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
8321 exactly 4 characters, alphanumeric only.
8326 ----------------------------------------
8327 Summary of changes for this release: 03_08_02
8330 1) ACPI CA Core Subsystem Version 20020308:
8332 Fixed a problem with AML Fields where the use of the "AccessAny"
8333 keyword could cause an interpreter error due to attempting to read
8334 or write beyond the end of the parent Operation Region.
8336 Fixed a problem in the SystemMemory Operation Region handler where
8337 an attempt was made to map memory beyond the end of the region.
8338 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
8339 errors on some Linux systems.
8341 Fixed a problem where the interpreter/namespace "search to root"
8342 algorithm was not functioning for some object types. Relaxed the
8343 internal restriction on the search to allow upsearches for all
8344 external object types as well as most internal types.
8349 We now use safe_halt() macro versus individual calls to sti | hlt.
8351 Writing to the processor limit interface should now work. "echo 1"
8352 will increase the limit, 2 will decrease, and 0 will reset to the
8359 Fixed segfault on Linux version.
8362 ----------------------------------------
8363 Summary of changes for this release: 02_25_02
8365 1) ACPI CA Core Subsystem:
8368 Fixed a problem where the GPE bit masks were not initialized
8369 properly, causing erratic GPE behavior.
8371 Implemented limited support for multiple calling conventions. The
8372 code can be generated with either the VPL (variable parameter
8373 list, or "C") convention, or the FPL (fixed parameter list, or
8374 "Pascal") convention. The core subsystem is about 3.4% smaller
8375 when generated with FPL.
8380 Re-add some /proc/acpi/event functionality that was lost during
8383 Resolved issue with /proc events for fixed-feature buttons showing
8384 up as the system device.
8386 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
8388 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
8390 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
8392 Fixed limit interface & usage to fix bugs with passive cooling
8395 Restructured PRT support.
8398 ----------------------------------------
8399 Summary of changes for this label: 02_14_02
8402 1) ACPI CA Core Subsystem:
8404 Implemented support in AcpiLoadTable to allow loading of FACS and
8407 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
8408 been removed. All 64-bit platforms should be migrated to the ACPI
8409 2.0 tables. The actbl71.h header has been removed from the source
8412 All C macros defined within the subsystem have been prefixed with
8413 "ACPI_" to avoid collision with other system include files.
8415 Removed the return value for the two AcpiOsPrint interfaces, since
8416 it is never used and causes lint warnings for ignoring the return
8419 Added error checking to all internal mutex acquire and release
8420 calls. Although a failure from one of these interfaces is
8421 probably a fatal system error, these checks will cause the
8422 immediate abort of the currently executing method or interface.
8424 Fixed a problem where the AcpiSetCurrentResources interface could
8425 fault. This was a side effect of the deployment of the new memory
8428 Fixed a couple of problems with the Global Lock support introduced
8429 in the last major build. The "common" (1.0/2.0) internal FACS was
8430 being overwritten with the FACS signature and clobbering the
8431 Global Lock pointer. Also, the actual firmware FACS was being
8432 unmapped after construction of the "common" FACS, preventing
8433 access to the actual Global Lock field within it. The "common"
8434 internal FACS is no longer installed as an actual ACPI table; it
8435 is used simply as a global.
8437 Code and Data Size: Current core subsystem library sizes are shown
8438 below. These are the code and data sizes for the acpica.lib
8439 produced by the Microsoft Visual C++ 6.0 compiler, and these
8440 values do not include any ACPI driver or OSPM code. The debug
8441 version of the code includes the debug output trace mechanism and
8442 has a larger code and data size. Note that these values will vary
8443 depending on the efficiency of the compiler and the compiler
8444 options used during generation.
8446 Previous Release (02_07_01)
8447 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
8448 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8450 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
8451 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
8456 Updated Linux-specific code for core macro and OSL interface
8457 changes described above.
8459 Improved /proc/acpi/event. It now can be opened only once and has
8460 proper poll functionality.
8462 Fixed and restructured power management (acpi_bus).
8464 Only create /proc "view by type" when devices of that class exist.
8466 Fixed "charging/discharging" bug (and others) in acpi_battery.
8468 Improved thermal zone code.
8471 3) ASL Compiler, version X2039:
8474 Implemented the new compiler restriction on ASL String hex/octal
8475 escapes to non-null, ASCII values. An error results if an invalid
8476 value is used. (This will require an ACPI 2.0 specification
8479 AML object labels that are output to the optional C and ASM source
8480 are now prefixed with both the ACPI table signature and table ID
8481 to help guarantee uniqueness within a large BIOS project.
8484 ----------------------------------------
8485 Summary of changes for this label: 02_01_02
8487 1) ACPI CA Core Subsystem:
8489 ACPI 2.0 support is complete in the entire Core Subsystem and the
8490 ASL compiler. All new ACPI 2.0 operators are implemented and all
8491 other changes for ACPI 2.0 support are complete. With
8492 simultaneous code and data optimizations throughout the subsystem,
8493 ACPI 2.0 support has been implemented with almost no additional
8494 cost in terms of code and data size.
8496 Implemented a new mechanism for allocation of return buffers. If
8497 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
8498 be allocated on behalf of the caller. Consolidated all return
8499 buffer validation and allocation to a common procedure. Return
8500 buffers will be allocated via the primary OSL allocation interface
8501 since it appears that a separate pool is not needed by most users.
8502 If a separate pool is required for these buffers, the caller can
8503 still use the original mechanism and pre-allocate the buffer(s).
8505 Implemented support for string operands within the DerefOf
8508 Restructured the Hardware and Event managers to be table driven,
8509 simplifying the source code and reducing the amount of generated
8512 Split the common read/write low-level ACPI register bitfield
8513 procedure into a separate read and write, simplifying the code
8516 Obsoleted the AcpiOsCallocate OSL interface. This interface was
8517 used only a handful of times and didn't have enough critical mass
8518 for a separate interface. Replaced with a common calloc procedure
8521 Fixed a reported problem with the GPE number mapping mechanism
8522 that allows GPE1 numbers to be non-contiguous with GPE0.
8523 Reorganized the GPE information and shrunk a large array that was
8524 originally large enough to hold info for all possible GPEs (256)
8525 to simply large enough to hold all GPEs up to the largest GPE
8526 number on the machine.
8528 Fixed a reported problem with resource structure alignment on 64-
8531 Changed the AcpiEnableEvent and AcpiDisableEvent external
8532 interfaces to not require any flags for the common case of
8533 enabling/disabling a GPE.
8535 Implemented support to allow a "Notify" on a Processor object.
8537 Most TBDs in comments within the source code have been resolved
8541 Fixed a problem in the interpreter where a standalone parent
8542 prefix (^) was not handled correctly in the interpreter and
8545 Removed obsolete and unnecessary GPE save/restore code.
8547 Implemented Field support in the ASL Load operator. This allows a
8548 table to be loaded from a named field, in addition to loading a
8549 table directly from an Operation Region.
8551 Implemented timeout and handle support in the external Global Lock
8554 Fixed a problem in the AcpiDump utility where pathnames were no
8555 longer being generated correctly during the dump of named objects.
8557 Modified the AML debugger to give a full display of if/while
8558 predicates instead of just one AML opcode at a time. (The
8559 predicate can have several nested ASL statements.) The old method
8560 was confusing during single stepping.
8562 Code and Data Size: Current core subsystem library sizes are shown
8563 below. These are the code and data sizes for the acpica.lib
8564 produced by the Microsoft Visual C++ 6.0 compiler, and these
8565 values do not include any ACPI driver or OSPM code. The debug
8566 version of the code includes the debug output trace mechanism and
8567 has a larger code and data size. Note that these values will vary
8568 depending on the efficiency of the compiler and the compiler
8569 options used during generation.
8571 Previous Release (12_18_01)
8572 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8573 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8575 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
8576 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8580 Implemented fix for PIIX reverse throttling errata (Processor
8583 Added new Limit interface (Processor and Thermal drivers)
8585 New thermal policy (Thermal driver)
8587 Many updates to /proc
8589 Battery "low" event support (Battery driver)
8591 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
8593 IA32 - IA64 initialization unification, no longer experimental
8595 Menuconfig options redesigned
8597 3) ASL Compiler, version X2037:
8599 Implemented several new output features to simplify integration of
8600 AML code into firmware: 1) Output the AML in C source code with
8601 labels for each named ASL object. The original ASL source code
8602 is interleaved as C comments. 2) Output the AML in ASM source code
8603 with labels and interleaved ASL source. 3) Output the AML in
8604 raw hex table form, in either C or ASM.
8606 Implemented support for optional string parameters to the
8609 Completed support for embedded escape sequences within string
8610 literals. The compiler now supports all single character escapes
8611 as well as the Octal and Hex escapes. Note: the insertion of a
8612 null byte into a string literal (via the hex/octal escape) causes
8613 the string to be immediately terminated. A warning is issued.
8615 Fixed a problem where incorrect AML was generated for the case
8616 where an ASL namepath consists of a single parent prefix (
8618 ) with no trailing name segments.
8620 The compiler has been successfully generated with a 64-bit C
8626 ----------------------------------------
8627 Summary of changes for this label: 12_18_01
8631 Enhanced blacklist with reason and severity fields. Any table's
8632 signature may now be used to identify a blacklisted system.
8634 Call _PIC control method to inform the firmware which interrupt
8635 model the OS is using. Turn on any disabled link devices.
8637 Cleaned up busmgr /proc error handling (Andreas Dilger)
8639 2) ACPI CA Core Subsystem:
8641 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
8644 Completed implementation of the ACPI 2.0 "Continue",
8645 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
8646 operators. All new ACPI 2.0 operators are now implemented in both
8647 the ASL compiler and the AML interpreter. The only remaining ACPI
8648 2.0 task is support for the String data type in the DerefOf
8649 operator. Fixed a problem with AcquireMutex where the status code
8650 was lost if the caller had to actually wait for the mutex.
8652 Increased the maximum ASL Field size from 64K bits to 4G bits.
8654 Completed implementation of the external Global Lock interfaces --
8655 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
8656 Handler parameters were added.
8658 Completed another pass at removing warnings and issues when
8659 compiling with 64-bit compilers. The code now compiles cleanly
8660 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
8661 add and subtract (diff) macros have changed considerably.
8664 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
8665 64-bit platforms, 32-bits on all others. This type is used
8666 wherever memory allocation and/or the C sizeof() operator is used,
8667 and affects the OSL memory allocation interfaces AcpiOsAllocate
8668 and AcpiOsCallocate.
8670 Implemented sticky user breakpoints in the AML debugger.
8672 Code and Data Size: Current core subsystem library sizes are shown
8673 below. These are the code and data sizes for the acpica.lib
8674 produced by the Microsoft Visual C++ 6.0 compiler, and these
8675 values do not include any ACPI driver or OSPM code. The debug
8676 version of the code includes the debug output trace mechanism and
8677 has a larger code and data size. Note that these values will vary
8678 depending on the efficiency of the compiler and the compiler
8679 options used during generation.
8681 Previous Release (12_05_01)
8682 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8683 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8685 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8686 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8688 3) ASL Compiler, version X2034:
8690 Now checks for (and generates an error if detected) the use of a
8691 Break or Continue statement without an enclosing While statement.
8694 Successfully generated the compiler with the Intel 64-bit C
8697 ----------------------------------------
8698 Summary of changes for this label: 12_05_01
8700 1) ACPI CA Core Subsystem:
8702 The ACPI 2.0 CopyObject operator is fully implemented. This
8703 operator creates a new copy of an object (and is also used to
8704 bypass the "implicit conversion" mechanism of the Store operator.)
8706 The ACPI 2.0 semantics for the SizeOf operator are fully
8707 implemented. The change is that performing a SizeOf on a
8708 reference object causes an automatic dereference of the object to
8709 tha actual value before the size is evaluated. This behavior was
8710 undefined in ACPI 1.0.
8712 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
8713 have been implemented. The interrupt polarity and mode are now
8716 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
8717 appearing in Package objects were not properly converted to
8718 integers when the internal Package was converted to an external
8719 object (via the AcpiEvaluateObject interface.)
8721 Fixed a problem with the namespace object deletion mechanism for
8722 objects created by control methods. There were two parts to this
8723 problem: 1) Objects created during the initialization phase method
8724 parse were not being deleted, and 2) The object owner ID mechanism
8725 to track objects was broken.
8727 Fixed a problem where the use of the ASL Scope operator within a
8728 control method would result in an invalid opcode exception.
8730 Fixed a problem introduced in the previous label where the buffer
8731 length required for the _PRT structure was not being returned
8734 Code and Data Size: Current core subsystem library sizes are shown
8735 below. These are the code and data sizes for the acpica.lib
8736 produced by the Microsoft Visual C++ 6.0 compiler, and these
8737 values do not include any ACPI driver or OSPM code. The debug
8738 version of the code includes the debug output trace mechanism and
8739 has a larger code and data size. Note that these values will vary
8740 depending on the efficiency of the compiler and the compiler
8741 options used during generation.
8743 Previous Release (11_20_01)
8744 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8745 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8748 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8749 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8753 Updated all files to apply cleanly against 2.4.16.
8755 Added basic PCI Interrupt Routing Table (PRT) support for IA32
8756 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
8757 version supports both static and dyanmic PRT entries, but dynamic
8758 entries are treated as if they were static (not yet
8759 reconfigurable). Architecture- specific code to use this data is
8760 absent on IA32 but should be available shortly.
8762 Changed the initialization sequence to start the ACPI interpreter
8763 (acpi_init) prior to initialization of the PCI driver (pci_init)
8764 in init/main.c. This ordering is required to support PRT and
8765 facilitate other (future) enhancement. A side effect is that the
8766 ACPI bus driver and certain device drivers can no longer be loaded
8769 Modified the 'make menuconfig' options to allow PCI Interrupt
8770 Routing support to be included without the ACPI Bus and other
8773 3) ASL Compiler, version X2033:
8775 Fixed some issues with the use of the new CopyObject and
8776 DataTableRegion operators. Both are fully functional.
8778 ----------------------------------------
8779 Summary of changes for this label: 11_20_01
8781 20 November 2001. Summary of changes for this release.
8783 1) ACPI CA Core Subsystem:
8785 Updated Index support to match ACPI 2.0 semantics. Storing a
8786 Integer, String, or Buffer to an Index of a Buffer will store only
8787 the least-significant byte of the source to the Indexed buffer
8788 byte. Multiple writes are not performed.
8790 Fixed a problem where the access type used in an AccessAs ASL
8791 operator was not recorded correctly into the field object.
8793 Fixed a problem where ASL Event objects were created in a
8794 signalled state. Events are now created in an unsignalled state.
8796 The internal object cache is now purged after table loading and
8797 initialization to reduce the use of dynamic kernel memory -- on
8798 the assumption that object use is greatest during the parse phase
8799 of the entire table (versus the run-time use of individual control
8802 ACPI 2.0 variable-length packages are now fully operational.
8804 Code and Data Size: Code and Data optimizations have permitted new
8805 feature development with an actual reduction in the library size.
8806 Current core subsystem library sizes are shown below. These are
8807 the code and data sizes for the acpica.lib produced by the
8808 Microsoft Visual C++ 6.0 compiler, and these values do not include
8809 any ACPI driver or OSPM code. The debug version of the code
8810 includes the debug output trace mechanism and has a larger code
8811 and data size. Note that these values will vary depending on the
8812 efficiency of the compiler and the compiler options used during
8815 Previous Release (11_09_01):
8816 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8817 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8820 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8821 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8825 Enhanced the ACPI boot-time initialization code to allow the use
8826 of Local APIC tables for processor enumeration on IA-32, and to
8827 pave the way for a fully MPS-free boot (on SMP systems) in the
8828 near future. This functionality replaces
8829 arch/i386/kernel/acpitables.c, which was introduced in an earlier
8830 2.4.15-preX release. To enable this feature you must add
8831 "acpi_boot=on" to the kernel command line -- see the help entry
8832 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
8835 Restructured the configuration options to allow boot-time table
8836 parsing support without inclusion of the ACPI Interpreter (and
8839 NOTE: This release does not include fixes for the reported events,
8840 power-down, and thermal passive cooling issues (coming soon).
8844 Added additional typechecking for Fields within restricted access
8845 Operation Regions. All fields within EC and CMOS regions must be
8846 declared with ByteAcc. All fields withing SMBus regions must be
8847 declared with the BufferAcc access type.
8849 Fixed a problem where the listing file output of control methods
8850 no longer interleaved the actual AML code with the ASL source
8856 ----------------------------------------
8857 Summary of changes for this label: 11_09_01
8859 1) ACPI CA Core Subsystem:
8861 Implemented ACPI 2.0-defined support for writes to fields with a
8862 Buffer, String, or Integer source operand that is smaller than the
8863 target field. In these cases, the source operand is zero-extended
8864 to fill the target field.
8866 Fixed a problem where a Field starting bit offset (within the
8867 parent operation region) was calculated incorrectly if the
8869 alignment of the field differed from the access width. This
8870 affected CreateWordField, CreateDwordField, CreateQwordField, and
8871 possibly other fields that use the "AccessAny" keyword.
8873 Fixed a problem introduced in the 11_02_01 release where indirect
8874 stores through method arguments did not operate correctly.
8878 Implemented boot-time ACPI table parsing support
8879 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
8880 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
8881 legacy BIOS interfaces (e.g. MPS) for the configuration of system
8882 processors, memory, and interrupts during setup_arch(). Note that
8883 this patch does not include the required architecture-specific
8884 changes required to apply this information -- subsequent patches
8885 will be posted for both IA32 and IA64 to achieve this.
8887 Added low-level sleep support for IA32 platforms, courtesy of Pat
8888 Mochel. This allows IA32 systems to transition to/from various
8889 sleeping states (e.g. S1, S3), although the lack of a centralized
8890 driver model and power-manageable drivers will prevent its
8891 (successful) use on most systems.
8893 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
8894 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
8895 tables" option, etc.
8897 Increased the default timeout for the EC driver from 1ms to 10ms
8898 (1000 cycles of 10us) to try to address AE_TIME errors during EC
8901 ----------------------------------------
8902 Summary of changes for this label: 11_02_01
8904 1) ACPI CA Core Subsystem:
8906 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
8907 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
8910 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
8911 changes to support ACPI 2.0 Qword field access. Read/Write
8912 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
8913 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
8914 the value parameter for the address space handler interface is now
8915 an ACPI_INTEGER. OSL implementations of these interfaces must now
8916 handle the case where the Width parameter is 64.
8918 Index Fields: Fixed a problem where unaligned bit assembly and
8919 disassembly for IndexFields was not supported correctly.
8921 Index and Bank Fields: Nested Index and Bank Fields are now
8922 supported. During field access, a check is performed to ensure
8923 that the value written to an Index or Bank register is not out of
8924 the range of the register. The Index (or Bank) register is
8925 written before each access to the field data. Future support will
8926 include allowing individual IndexFields to be wider than the
8929 Fields: Fixed a problem where the AML interpreter was incorrectly
8930 attempting to write beyond the end of a Field/OpRegion. This was
8931 a boundary case that occurred when a DWORD field was written to a
8932 BYTE access OpRegion, forcing multiple writes and causing the
8933 interpreter to write one datum too many.
8935 Fields: Fixed a problem with Field/OpRegion access where the
8936 starting bit address of a field was incorrectly calculated if the
8937 current access type was wider than a byte (WordAcc, DwordAcc, or
8940 Fields: Fixed a problem where forward references to individual
8941 FieldUnits (individual Field names within a Field definition) were
8942 not resolved during the AML table load.
8944 Fields: Fixed a problem where forward references from a Field
8945 definition to the parent Operation Region definition were not
8946 resolved during the AML table load.
8948 Fields: Duplicate FieldUnit names within a scope are now detected
8949 during AML table load.
8951 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
8952 returned an incorrect name for the root node.
8954 Code and Data Size: Code and Data optimizations have permitted new
8955 feature development with an actual reduction in the library size.
8956 Current core subsystem library sizes are shown below. These are
8957 the code and data sizes for the acpica.lib produced by the
8958 Microsoft Visual C++ 6.0 compiler, and these values do not include
8959 any ACPI driver or OSPM code. The debug version of the code
8960 includes the debug output trace mechanism and has a larger code
8961 and data size. Note that these values will vary depending on the
8962 efficiency of the compiler and the compiler options used during
8965 Previous Release (10_18_01):
8966 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8967 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8970 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8971 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8975 Improved /proc processor output (Pavel Machek) Re-added
8976 MODULE_LICENSE("GPL") to all modules.
8978 3) ASL Compiler version X2030:
8980 Duplicate FieldUnit names within a scope are now detected and
8985 Programmer Reference updated to reflect OSL and address space
8986 handler interface changes described above.
8988 ----------------------------------------
8989 Summary of changes for this label: 10_18_01
8991 ACPI CA Core Subsystem:
8993 Fixed a problem with the internal object reference count mechanism
8994 that occasionally caused premature object deletion. This resolves
8995 all of the outstanding problem reports where an object is deleted
8996 in the middle of an interpreter evaluation. Although this problem
8997 only showed up in rather obscure cases, the solution to the
8998 problem involved an adjustment of all reference counts involving
8999 objects attached to namespace nodes.
9001 Fixed a problem with Field support in the interpreter where
9002 writing to an aligned field whose length is an exact multiple (2
9003 or greater) of the field access granularity would cause an attempt
9004 to write beyond the end of the field.
9006 The top level AML opcode execution functions within the
9007 interpreter have been renamed with a more meaningful and
9008 consistent naming convention. The modules exmonad.c and
9009 exdyadic.c were eliminated. New modules are exoparg1.c,
9010 exoparg2.c, exoparg3.c, and exoparg6.c.
9012 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
9014 Fixed a problem where the AML debugger was causing some internal
9015 objects to not be deleted during subsystem termination.
9017 Fixed a problem with the external AcpiEvaluateObject interface
9018 where the subsystem would fault if the named object to be
9019 evaluated refered to a constant such as Zero, Ones, etc.
9021 Fixed a problem with IndexFields and BankFields where the
9022 subsystem would fault if the index, data, or bank registers were
9023 not defined in the same scope as the field itself.
9025 Added printf format string checking for compilers that support
9026 this feature. Corrected more than 50 instances of issues with
9027 format specifiers within invocations of ACPI_DEBUG_PRINT
9028 throughout the core subsystem code.
9030 The ASL "Revision" operator now returns the ACPI support level
9031 implemented in the core - the value "2" since the ACPI 2.0 support
9032 is more than 50% implemented.
9034 Enhanced the output of the AML debugger "dump namespace" command
9035 to output in a more human-readable form.
9037 Current core subsystem library code sizes are shown below. These
9039 are the code and data sizes for the acpica.lib produced by the
9040 Microsoft Visual C++ 6.0 compiler, and these values do not include
9041 any ACPI driver or OSPM code. The debug version of the code
9042 includes the full debug trace mechanism -- leading to a much
9044 larger code and data size. Note that these values will vary
9045 depending on the efficiency of the compiler and the compiler
9046 options used during generation.
9048 Previous Label (09_20_01):
9049 Non-Debug Version: 65K Code, 5K Data, 70K Total
9050 Debug Version: 138K Code, 58K Data, 196K Total
9054 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
9055 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
9059 Implemented a "Bad BIOS Blacklist" to track machines that have
9060 known ASL/AML problems.
9062 Enhanced the /proc interface for the thermal zone driver and added
9063 support for _HOT (the critical suspend trip point). The 'info'
9064 file now includes threshold/policy information, and allows setting
9065 of _SCP (cooling preference) and _TZP (polling frequency) values
9066 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
9067 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
9068 preference to the passive/quiet mode (if supported by the ASL).
9070 Implemented a workaround for a gcc bug that resuted in an OOPs
9071 when loading the control method battery driver.
9073 ----------------------------------------
9074 Summary of changes for this label: 09_20_01
9076 ACPI CA Core Subsystem:
9078 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
9079 modified to allow individual GPE levels to be flagged as wake-
9080 enabled (i.e., these GPEs are to remain enabled when the platform
9083 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
9084 support wake-enabled GPEs. This means that upon entering the
9085 sleep state, all GPEs that are not wake-enabled are disabled.
9086 When leaving the sleep state, these GPEs are reenabled.
9088 A local double-precision divide/modulo module has been added to
9089 enhance portability to OS kernels where a 64-bit math library is
9090 not available. The new module is "utmath.c".
9092 Several optimizations have been made to reduce the use of CPU
9093 stack. Originally over 2K, the maximum stack usage is now below
9094 2K at 1860 bytes (1.82k)
9096 Fixed a problem with the AcpiGetFirmwareTable interface where the
9097 root table pointer was not mapped into a logical address properly.
9099 Fixed a problem where a NULL pointer was being dereferenced in the
9100 interpreter code for the ASL Notify operator.
9102 Fixed a problem where the use of the ASL Revision operator
9103 returned an error. This operator now returns the current version
9104 of the ACPI CA core subsystem.
9106 Fixed a problem where objects passed as control method parameters
9107 to AcpiEvaluateObject were always deleted at method termination.
9108 However, these objects may end up being stored into the namespace
9109 by the called method. The object reference count mechanism was
9110 applied to these objects instead of a force delete.
9112 Fixed a problem where static strings or buffers (contained in the
9113 AML code) that are declared as package elements within the ASL
9114 code could cause a fault because the interpreter would attempt to
9115 delete them. These objects are now marked with the "static
9116 object" flag to prevent any attempt to delete them.
9118 Implemented an interpreter optimization to use operands directly
9119 from the state object instead of extracting the operands to local
9120 variables. This reduces stack use and code size, and improves
9123 The module exxface.c was eliminated as it was an unnecessary extra
9126 Current core subsystem library code sizes are shown below. These
9127 are the code and data sizes for the acpica.lib produced by the
9128 Microsoft Visual C++ 6.0 compiler, and these values do not include
9129 any ACPI driver or OSPM code. The debug version of the code
9130 includes the full debug trace mechanism -- leading to a much
9131 larger code and data size. Note that these values will vary
9132 depending on the efficiency of the compiler and the compiler
9133 options used during generation.
9135 Non-Debug Version: 65K Code, 5K Data, 70K Total
9136 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
9137 Total (Previously 195K)
9141 Support for ACPI 2.0 64-bit integers has been added. All ACPI
9142 Integer objects are now 64 bits wide
9144 All Acpi data types and structures are now in lower case. Only
9145 Acpi macros are upper case for differentiation.
9149 Changes to the external interfaces as described above.
9151 ----------------------------------------
9152 Summary of changes for this label: 08_31_01
9154 ACPI CA Core Subsystem:
9156 A bug with interpreter implementation of the ASL Divide operator
9157 was found and fixed. The implicit function return value (not the
9158 explicit store operands) was returning the remainder instead of
9159 the quotient. This was a longstanding bug and it fixes several
9160 known outstanding issues on various platforms.
9162 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
9163 been further optimized for size. There are 700 invocations of the
9164 DEBUG_PRINT macro alone, so each optimization reduces the size of
9165 the debug version of the subsystem significantly.
9167 A stack trace mechanism has been implemented. The maximum stack
9168 usage is about 2K on 32-bit platforms. The debugger command "stat
9169 stack" will display the current maximum stack usage.
9171 All public symbols and global variables within the subsystem are
9172 now prefixed with the string "Acpi". This keeps all of the
9173 symbols grouped together in a kernel map, and avoids conflicts
9174 with other kernel subsystems.
9176 Most of the internal fixed lookup tables have been moved into the
9177 code segment via the const operator.
9179 Several enhancements have been made to the interpreter to both
9180 reduce the code size and improve performance.
9182 Current core subsystem library code sizes are shown below. These
9183 are the code and data sizes for the acpica.lib produced by the
9184 Microsoft Visual C++ 6.0 compiler, and these values do not include
9185 any ACPI driver or OSPM code. The debug version of the code
9186 includes the full debug trace mechanism which contains over 700
9187 invocations of the DEBUG_PRINT macro, 500 function entry macro
9188 invocations, and over 900 function exit macro invocations --
9189 leading to a much larger code and data size. Note that these
9190 values will vary depending on the efficiency of the compiler and
9191 the compiler options used during generation.
9193 Non-Debug Version: 64K Code, 5K Data, 69K Total
9194 Debug Version: 137K Code, 58K Data, 195K Total
9198 Implemented wbinvd() macro, pending a kernel-wide definition.
9200 Fixed /proc/acpi/event to handle poll() and short reads.
9202 ASL Compiler, version X2026:
9204 Fixed a problem introduced in the previous label where the AML
9206 code emitted for package objects produced packages with zero
9209 ----------------------------------------
9210 Summary of changes for this label: 08_16_01
9212 ACPI CA Core Subsystem:
9214 The following ACPI 2.0 ASL operators have been implemented in the
9215 AML interpreter (These are already supported by the Intel ASL
9216 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
9217 ToBuffer. Support for 64-bit AML constants is implemented in the
9218 AML parser, debugger, and disassembler.
9220 The internal memory tracking mechanism (leak detection code) has
9221 been upgraded to reduce the memory overhead (a separate tracking
9222 block is no longer allocated for each memory allocation), and now
9223 supports all of the internal object caches.
9225 The data structures and code for the internal object caches have
9226 been coelesced and optimized so that there is a single cache and
9227 memory list data structure and a single group of functions that
9228 implement generic cache management. This has reduced the code
9229 size in both the debug and release versions of the subsystem.
9231 The DEBUG_PRINT macro(s) have been optimized for size and replaced
9232 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
9233 different, because it generates a single call to an internal
9234 function. This results in a savings of about 90 bytes per
9235 invocation, resulting in an overall code and data savings of about
9236 16% in the debug version of the subsystem.
9240 Fixed C3 disk corruption problems and re-enabled C3 on supporting
9243 Integrated low-level sleep code by Patrick Mochel.
9245 Further tweaked source code Linuxization.
9251 Support for ACPI 2.0 variable length packages is fixed/completed.
9253 Fixed a problem where the optional length parameter for the ACPI
9254 2.0 ToString operator.
9256 Fixed multiple extraneous error messages when a syntax error is
9257 detected within the declaration line of a control method.
9259 ----------------------------------------
9260 Summary of changes for this label: 07_17_01
9262 ACPI CA Core Subsystem:
9264 Added a new interface named AcpiGetFirmwareTable to obtain any
9265 ACPI table via the ACPI signature. The interface can be called at
9266 any time during kernel initialization, even before the kernel
9267 virtual memory manager is initialized and paging is enabled. This
9268 allows kernel subsystems to obtain ACPI tables very early, even
9269 before the ACPI CA subsystem is initialized.
9271 Fixed a problem where Fields defined with the AnyAcc attribute
9272 could be resolved to the incorrect address under the following
9273 conditions: 1) the field width is larger than 8 bits and 2) the
9274 parent operation region is not defined on a DWORD boundary.
9276 Fixed a problem where the interpreter is not being locked during
9277 namespace initialization (during execution of the _INI control
9278 methods), causing an error when an attempt is made to release it
9281 ACPI 2.0 support in the AML Interpreter has begun and will be
9282 ongoing throughout the rest of this year. In this label, The Mod
9283 operator is implemented.
9285 Added a new data type to contain full PCI addresses named
9286 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
9287 and Function values.
9291 Enhanced the Linux version of the source code to change most
9292 capitalized ACPI type names to lowercase. For example, all
9293 instances of ACPI_STATUS are changed to acpi_status. This will
9294 result in a large diff, but the change is strictly cosmetic and
9295 aligns the CA code closer to the Linux coding standard.
9299 The interfaces to the PCI configuration space have been changed to
9300 add the PCI Segment number and to split the single 32-bit combined
9301 DeviceFunction field into two 16-bit fields. This was
9302 accomplished by moving the four values that define an address in
9303 PCI configuration space (segment, bus, device, and function) to
9304 the new ACPI_PCI_ID structure.
9306 The changes to the PCI configuration space interfaces led to a
9307 reexamination of the complete set of address space access
9308 interfaces for PCI, I/O, and Memory. The previously existing 18
9309 interfaces have proven difficult to maintain (any small change
9310 must be propagated across at least 6 interfaces) and do not easily
9311 allow for future expansion to 64 bits if necessary. Also, on some
9312 systems, it would not be appropriate to demultiplex the access
9313 width (8, 16, 32,or 64) before calling the OSL if the
9314 corresponding native OS interfaces contain a similar access width
9315 parameter. For these reasons, the 18 address space interfaces
9316 have been replaced by these 6 new ones:
9318 AcpiOsReadPciConfiguration
9319 AcpiOsWritePciConfiguration
9325 Added a new interface named AcpiOsGetRootPointer to allow the OSL
9326 to perform the platform and/or OS-specific actions necessary to
9327 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
9328 interface will simply call down to the CA core to perform the low-
9329 memory search for the table. On IA-64, the RSDP is obtained from
9330 EFI. Migrating this interface to the OSL allows the CA core to
9332 remain OS and platform independent.
9334 Added a new interface named AcpiOsSignal to provide a generic
9335 "function code and pointer" interface for various miscellaneous
9336 signals and notifications that must be made to the host OS. The
9337 first such signals are intended to support the ASL Fatal and
9338 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
9339 interface has been obsoleted.
9341 The definition of the AcpiFormatException interface has been
9342 changed to simplify its use. The caller no longer must supply a
9343 buffer to the call; A pointer to a const string is now returned
9344 directly. This allows the call to be easily used in printf
9345 statements, etc. since the caller does not have to manage a local
9349 ASL Compiler, Version X2025:
9351 The ACPI 2.0 Switch/Case/Default operators have been implemented
9352 and are fully functional. They will work with all ACPI 1.0
9353 interpreters, since the operators are simply translated to If/Else
9356 The ACPI 2.0 ElseIf operator is implemented and will also work
9357 with 1.0 interpreters, for the same reason.
9359 Implemented support for ACPI 2.0 variable-length packages. These
9360 packages have a separate opcode, and their size is determined by
9361 the interpreter at run-time.
9363 Documentation The ACPI CA Programmer Reference has been updated to
9364 reflect the new interfaces and changes to existing interfaces.
9366 ------------------------------------------
9367 Summary of changes for this label: 06_15_01
9369 ACPI CA Core Subsystem:
9371 Fixed a problem where a DWORD-accessed field within a Buffer
9372 object would get its byte address inadvertently rounded down to
9373 the nearest DWORD. Buffers are always Byte-accessible.
9375 ASL Compiler, version X2024:
9377 Fixed a problem where the Switch() operator would either fault or
9378 hang the compiler. Note however, that the AML code for this ACPI
9379 2.0 operator is not yet implemented.
9381 Compiler uses the new AcpiOsGetTimer interface to obtain compile
9384 Implementation of the CreateField operator automatically converts
9385 a reference to a named field within a resource descriptor from a
9386 byte offset to a bit offset if required.
9388 Added some missing named fields from the resource descriptor
9389 support. These are the names that are automatically created by the
9390 compiler to reference fields within a descriptor. They are only
9391 valid at compile time and are not passed through to the AML
9394 Resource descriptor named fields are now typed as Integers and
9395 subject to compile-time typechecking when used in expressions.
9397 ------------------------------------------
9398 Summary of changes for this label: 05_18_01
9400 ACPI CA Core Subsystem:
9402 Fixed a couple of problems in the Field support code where bits
9403 from adjacent fields could be returned along with the proper field
9404 bits. Restructured the field support code to improve performance,
9405 readability and maintainability.
9407 New DEBUG_PRINTP macro automatically inserts the procedure name
9408 into the output, saving hundreds of copies of procedure name
9409 strings within the source, shrinking the memory footprint of the
9410 debug version of the core subsystem.
9412 Source Code Structure:
9414 The source code directory tree was restructured to reflect the
9415 current organization of the component architecture. Some files
9416 and directories have been moved and/or renamed.
9420 Fixed leaking kacpidpc processes.
9422 Fixed queueing event data even when /proc/acpi/event is not
9425 ASL Compiler, version X2020:
9427 Memory allocation performance enhancement - over 24X compile time
9428 improvement on large ASL files. Parse nodes and namestring
9429 buffers are now allocated from a large internal compiler buffer.
9431 The temporary .SRC file is deleted unless the "-s" option is
9434 The "-d" debug output option now sends all output to the .DBG file
9435 instead of the console.
9437 "External" second parameter is now optional
9439 "ElseIf" syntax now properly allows the predicate
9441 Last operand to "Load" now recognized as a Target operand
9443 Debug object can now be used anywhere as a normal object.
9445 ResourceTemplate now returns an object of type BUFFER
9447 EISAID now returns an object of type INTEGER
9449 "Index" now works with a STRING operand
9451 "LoadTable" now accepts optional parameters
9453 "ToString" length parameter is now optional
9455 "Interrupt (ResourceType," parse error fixed.
9457 "Register" with a user-defined region space parse error fixed
9459 Escaped backslash at the end of a string ("\\") scan/parse error
9462 "Revision" is now an object of type INTEGER.
9466 ------------------------------------------
9467 Summary of changes for this label: 05_02_01
9471 /proc/acpi/event now blocks properly.
9473 Removed /proc/sys/acpi. You can still dump your DSDT from
9476 ACPI CA Core Subsystem:
9478 Fixed a problem introduced in the previous label where some of the
9479 "small" resource descriptor types were not recognized.
9481 Improved error messages for the case where an ASL Field is outside
9482 the range of the parent operation region.
9484 ASL Compiler, version X2018:
9487 Added error detection for ASL Fields that extend beyond the length
9488 of the parent operation region (only if the length of the region
9489 is known at compile time.) This includes fields that have a
9490 minimum access width that is smaller than the parent region, and
9491 individual field units that are partially or entirely beyond the
9492 extent of the parent.
9496 ------------------------------------------
9497 Summary of changes for this label: 04_27_01
9499 ACPI CA Core Subsystem:
9501 Fixed a problem where the namespace mutex could be released at the
9502 wrong time during execution of AcpiRemoveAddressSpaceHandler.
9504 Added optional thread ID output for debug traces, to simplify
9505 debugging of multiple threads. Added context switch notification
9506 when the debug code realizes that a different thread is now
9507 executing ACPI code.
9509 Some additional external data types have been prefixed with the
9510 string "ACPI_" for consistency. This may effect existing code.
9511 The data types affected are the external callback typedefs - e.g.,
9513 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
9517 Fixed an issue with the OSL semaphore implementation where a
9518 thread was waking up with an error from receiving a SIGCHLD
9521 Linux version of ACPI CA now uses the system C library for string
9522 manipulation routines instead of a local implementation.
9524 Cleaned up comments and removed TBDs.
9526 ASL Compiler, version X2017:
9528 Enhanced error detection and reporting for all file I/O
9533 Programmer Reference updated to version 1.06.
9537 ------------------------------------------
9538 Summary of changes for this label: 04_13_01
9540 ACPI CA Core Subsystem:
9542 Restructured support for BufferFields and RegionFields.
9543 BankFields support is now fully operational. All known 32-bit
9544 limitations on field sizes have been removed. Both BufferFields
9545 and (Operation) RegionFields are now supported by the same field
9548 Resource support now supports QWORD address and IO resources. The
9549 16/32/64 bit address structures and the Extended IRQ structure
9550 have been changed to properly handle Source Resource strings.
9552 A ThreadId of -1 is now used to indicate a "mutex not acquired"
9553 condition internally and must never be returned by AcpiOsThreadId.
9554 This reserved value was changed from 0 since Unix systems allow a
9559 Driver code reorganized to enhance portability
9561 Added a kernel configuration option to control ACPI_DEBUG
9563 Fixed the EC driver to honor _GLK.
9565 ASL Compiler, version X2016:
9567 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
9568 address space was set to 0, not 0x7f as it should be.
9570 ------------------------------------------
9571 Summary of changes for this label: 03_13_01
9573 ACPI CA Core Subsystem:
9575 During ACPI initialization, the _SB_._INI method is now run if
9578 Notify handler fix - notifies are deferred until the parent method
9579 completes execution. This fixes the "mutex already acquired"
9580 issue seen occasionally.
9582 Part of the "implicit conversion" rules in ACPI 2.0 have been
9583 found to cause compatibility problems with existing ASL/AML. The
9584 convert "result-to-target-type" implementation has been removed
9585 for stores to method Args and Locals. Source operand conversion
9586 is still fully implemented. Possible changes to ACPI 2.0
9587 specification pending.
9589 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
9592 Fix for compiler warnings for 64-bit compiles.
9596 /proc output aligned for easier parsing.
9598 Release-version compile problem fixed.
9600 New kernel configuration options documented in Configure.help.
9602 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
9607 Power resource driver integrated with bus manager.
9609 Fixed kernel fault during active cooling for thermal zones.
9613 The source code tree has been restructured.
9617 ------------------------------------------
9618 Summary of changes for this label: 03_02_01
9620 Linux OS Services Layer (OSL):
9622 Major revision of all Linux-specific code.
9624 Modularized all ACPI-specific drivers.
9626 Added new thermal zone and power resource drivers.
9628 Revamped /proc interface (new functionality is under /proc/acpi).
9630 New kernel configuration options.
9634 New kernel configuration options not documented in Configure.help
9638 Module dependencies not currently implemented. If used, they
9639 should be loaded in this order: busmgr, power, ec, system,
9640 processor, battery, ac_adapter, button, thermal.
9642 Modules will not load if CONFIG_MODVERSION is set.
9644 IBM 600E - entering S5 may reboot instead of shutting down.
9646 IBM 600E - Sleep button may generate "Invalid <NULL> context"
9649 Some systems may fail with "execution mutex already acquired"
9652 ACPI CA Core Subsystem:
9654 Added a new OSL Interface, AcpiOsGetThreadId. This was required
9655 for the deadlock detection code. Defined to return a non-zero, 32-
9656 bit thread ID for the currently executing thread. May be a non-
9657 zero constant integer on single-thread systems.
9659 Implemented deadlock detection for internal subsystem mutexes. We
9660 may add conditional compilation for this code (debug only) later.
9662 ASL/AML Mutex object semantics are now fully supported. This
9663 includes multiple acquires/releases by owner and support for the
9665 Mutex SyncLevel parameter.
9667 A new "Force Release" mechanism automatically frees all ASL
9668 Mutexes that have been acquired but not released when a thread
9669 exits the interpreter. This forces conformance to the ACPI spec
9670 ("All mutexes must be released when an invocation exits") and
9671 prevents deadlocked ASL threads. This mechanism can be expanded
9672 (later) to monitor other resource acquisitions if OEM ASL code
9673 continues to misbehave (which it will).
9675 Several new ACPI exception codes have been added for the Mutex
9678 Recursive method calls are now allowed and supported (the ACPI
9679 spec does in fact allow recursive method calls.) The number of
9680 recursive calls is subject to the restrictions imposed by the
9681 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
9684 Implemented support for the SyncLevel parameter for control
9685 methods (ACPI 2.0 feature)
9687 Fixed a deadlock problem when multiple threads attempted to use
9690 Fixed a problem where the string length of a String package
9691 element was not always set in a package returned from
9694 Fixed a problem where the length of a String package element was
9695 not always included in the length of the overall package returned
9696 from AcpiEvaluateObject.
9698 Added external interfaces (Acpi*) to the ACPI debug memory
9699 manager. This manager keeps a list of all outstanding
9700 allocations, and can therefore detect memory leaks and attempts to
9701 free memory blocks more than once. Useful for code such as the
9702 power manager, etc. May not be appropriate for device drivers.
9703 Performance with the debug code enabled is slow.
9705 The ACPI Global Lock is now an optional hardware element.
9707 ASL Compiler Version X2015:
9709 Integrated changes to allow the compiler to be generated on
9712 Linux makefile added to generate the compiler on Linux
9716 All platform-specific headers have been moved to their own
9717 subdirectory, Include/Platform.
9719 New source file added, Interpreter/ammutex.c
9721 New header file, Include/acstruct.h
9725 The programmer reference has been updated for the following new
9726 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
9728 ------------------------------------------
9729 Summary of changes for this label: 02_08_01
9731 Core ACPI CA Subsystem: Fixed a problem where an error was
9732 incorrectly returned if the return resource buffer was larger than
9733 the actual data (in the resource interfaces).
9735 References to named objects within packages are resolved to the
9737 full pathname string before packages are returned directly (via
9738 the AcpiEvaluateObject interface) or indirectly via the resource
9741 Linux OS Services Layer (OSL):
9743 Improved /proc battery interface.
9746 Added C-state debugging output and other miscellaneous fixes.
9748 ASL Compiler Version X2014:
9750 All defined method arguments can now be used as local variables,
9751 including the ones that are not actually passed in as parameters.
9752 The compiler tracks initialization of the arguments and issues an
9753 exception if they are used without prior assignment (just like
9756 The -o option now specifies a filename prefix that is used for all
9757 output files, including the AML output file. Otherwise, the
9758 default behavior is as follows: 1) the AML goes to the file
9759 specified in the DSDT. 2) all other output files use the input
9760 source filename as the base.
9762 ------------------------------------------
9763 Summary of changes for this label: 01_25_01
9765 Core ACPI CA Subsystem: Restructured the implementation of object
9766 store support within the interpreter. This includes support for
9767 the Store operator as well as any ASL operators that include a
9770 Partially implemented support for Implicit Result-to-Target
9771 conversion. This is when a result object is converted on the fly
9772 to the type of an existing target object. Completion of this
9773 support is pending further analysis of the ACPI specification
9774 concerning this matter.
9776 CPU-specific code has been removed from the subsystem (hardware
9779 New Power Management Timer functions added
9781 Linux OS Services Layer (OSL): Moved system state transition code
9782 to the core, fixed it, and modified Linux OSL accordingly.
9784 Fixed C2 and C3 latency calculations.
9787 We no longer use the compilation date for the version message on
9788 initialization, but retrieve the version from AcpiGetSystemInfo().
9790 Incorporated for fix Sony VAIO machines.
9792 Documentation: The Programmer Reference has been updated and
9796 ASL Compiler: Version X2013: Fixed a problem where the line
9797 numbering and error reporting could get out of sync in the
9798 presence of multiple include files.
9800 ------------------------------------------
9801 Summary of changes for this label: 01_15_01
9803 Core ACPI CA Subsystem:
9805 Implemented support for type conversions in the execution of the
9806 ASL Concatenate operator (The second operand is converted to
9807 match the type of the first operand before concatenation.)
9809 Support for implicit source operand conversion is partially
9810 implemented. The ASL source operand types Integer, Buffer, and
9811 String are freely interchangeable for most ASL operators and are
9812 converted by the interpreter on the fly as required. Implicit
9813 Target operand conversion (where the result is converted to the
9814 target type before storing) is not yet implemented.
9816 Support for 32-bit and 64-bit BCD integers is implemented.
9818 Problem fixed where a field read on an aligned field could cause a
9819 read past the end of the field.
9821 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
9822 does not return a value, but the caller expects one. (The ASL
9823 compiler flags this as a warning.)
9828 1. Static typechecking of all operands is implemented. This
9829 prevents the use of invalid objects (such as using a Package where
9830 an Integer is required) at compile time instead of at interpreter
9832 2. The ASL source line is printed with ALL errors and warnings.
9833 3. Bug fix for source EOF without final linefeed.
9834 4. Debug option is split into a parse trace and a namespace trace.
9835 5. Namespace output option (-n) includes initial values for
9836 integers and strings.
9837 6. Parse-only option added for quick syntax checking.
9838 7. Compiler checks for duplicate ACPI name declarations
9841 1. Relaxed typechecking to allow interchangeability between
9842 strings, integers, and buffers. These types are now converted by
9843 the interpreter at runtime.
9844 2. Compiler reports time taken by each internal subsystem in the
9848 ------------------------------------------
9849 Summary of changes for this label: 12_14_00
9853 This is the first official release of the compiler. Since the
9854 compiler requires elements of the Core Subsystem, this label
9855 synchronizes everything.
9857 ------------------------------------------
9858 Summary of changes for this label: 12_08_00
9861 Fixed a problem where named references within the ASL definition
9862 of both OperationRegions and CreateXXXFields did not work
9863 properly. The symptom was an AE_AML_OPERAND_TYPE during
9864 initialization of the region/field. This is similar (but not
9865 related internally) to the problem that was fixed in the last
9868 Implemented both 32-bit and 64-bit support for the BCD ASL
9869 functions ToBCD and FromBCD.
9871 Updated all legal headers to include "2000" in the copyright
9874 ------------------------------------------
9875 Summary of changes for this label: 12_01_00
9877 Fixed a problem where method invocations within the ASL definition
9878 of both OperationRegions and CreateXXXFields did not work
9879 properly. The symptom was an AE_AML_OPERAND_TYPE during
9880 initialization of the region/field:
9882 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
9883 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
9886 Fixed a problem where operators with more than one nested
9887 subexpression would fail. The symptoms were varied, by mostly
9888 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
9889 problem that has gone unnoticed until now.
9891 Subtract (Add (1,2), Multiply (3,4))
9893 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
9894 previous build (The prefix part of a relative path was handled
9897 Fixed a problem where Operation Region initialization failed if
9898 the operation region name was a "namepath" instead of a simple
9899 "nameseg". Symptom was an AE_NO_OPERAND error.
9901 Fixed a problem where an assignment to a local variable via the
9902 indirect RefOf mechanism only worked for the first such
9903 assignment. Subsequent assignments were ignored.
9905 ------------------------------------------
9906 Summary of changes for this label: 11_15_00
9908 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
9909 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
9910 the AML interpreter does NOT have support for the new 2.0 ASL
9911 grammar terms at this time.
9913 All ACPI hardware access is via the GAS structures in the ACPI 2.0
9916 All physical memory addresses across all platforms are now 64 bits
9917 wide. Logical address width remains dependent on the platform
9920 AcpiOsMapMemory interface changed to a 64-bit physical address.
9922 The AML interpreter integer size is now 64 bits, as per the ACPI
9925 For backwards compatibility with ACPI 1.0, ACPI tables with a
9926 revision number less than 2 use 32-bit integers only.
9928 Fixed a problem where the evaluation of OpRegion operands did not
9929 always resolve them to numbers properly.
9931 ------------------------------------------
9932 Summary of changes for this label: 10_20_00
9934 Fix for CBN_._STA issue. This fix will allow correct access to
9935 CBN_ OpRegions when the _STA returns 0x8.
9937 Support to convert ACPI constants (Ones, Zeros, One) to actual
9938 values before a package object is returned
9940 Fix for method call as predicate to if/while construct causing
9941 incorrect if/while behavior
9943 Fix for Else block package lengths sometimes calculated wrong (if
9946 Fix for Processor object length field, was always zero
9948 Table load abort if FACP sanity check fails
9950 Fix for problem with Scope(name) if name already exists
9952 Warning emitted if a named object referenced cannot be found
9953 (resolved) during method execution.
9959 ------------------------------------------
9960 Summary of changes for this label: 9_29_00
9962 New table initialization interfaces: AcpiInitializeSubsystem no
9963 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
9964 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
9965 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
9968 Note: These interface changes require changes to all existing OSDs
9970 The PCI_Config default address space handler is always installed
9971 at the root namespace object.
9973 -------------------------------------------
9974 Summary of changes for this label: 09_15_00
9976 The new initialization architecture is implemented. New
9977 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
9978 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
9980 (Namespace is automatically loaded when a table is loaded)
9982 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
9983 52 bytes to 32 bytes. There is usually one of these for every
9984 namespace object, so the memory savings is significant.
9986 Implemented just-in-time evaluation of the CreateField operators.
9988 Bug fixes for IA-64 support have been integrated.
9990 Additional code review comments have been implemented
9992 The so-called "third pass parse" has been replaced by a final walk
9993 through the namespace to initialize all operation regions (address
9994 spaces) and fields that have not yet been initialized during the
9995 execution of the various _INI and REG methods.
9997 New file - namespace/nsinit.c
9999 -------------------------------------------
10000 Summary of changes for this label: 09_01_00
10002 Namespace manager data structures have been reworked to change the
10003 primary object from a table to a single object. This has
10004 resulted in dynamic memory savings of 3X within the namespace and
10005 2X overall in the ACPI CA subsystem.
10007 Fixed problem where the call to AcpiEvFindPciRootBuses was
10008 inadvertently left commented out.
10010 Reduced the warning count when generating the source with the GCC
10013 Revision numbers added to each module header showing the
10014 SourceSafe version of the file. Please refer to this version
10015 number when giving us feedback or comments on individual modules.
10017 The main object types within the subsystem have been renamed to
10018 clarify their purpose:
10020 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
10021 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
10022 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
10024 NOTE: no changes to the initialization sequence are included in
10027 -------------------------------------------
10028 Summary of changes for this label: 08_23_00
10030 Fixed problem where TerminateControlMethod was being called
10031 multiple times per method
10033 Fixed debugger problem where single stepping caused a semaphore to
10036 Improved performance through additional parse object caching -
10037 added ACPI_EXTENDED_OP type
10039 -------------------------------------------
10040 Summary of changes for this label: 08_10_00
10042 Parser/Interpreter integration: Eliminated the creation of
10043 complete parse trees for ACPI tables and control methods.
10044 Instead, parse subtrees are created and then deleted as soon as
10045 they are processed (Either entered into the namespace or executed
10046 by the interpreter). This reduces the use of dynamic kernel
10047 memory significantly. (about 10X)
10049 Exception codes broken into classes and renumbered. Be sure to
10050 recompile all code that includes acexcep.h. Hopefully we won't
10051 have to renumber the codes again now that they are split into
10052 classes (environment, programmer, AML code, ACPI table, and
10055 Fixed some additional alignment issues in the Resource Manager
10058 Implemented semaphore tracking in the AcpiExec utility, and fixed
10059 several places where mutexes/semaphores were being unlocked
10060 without a corresponding lock operation. There are no known
10061 semaphore or mutex "leaks" at this time.
10063 Fixed the case where an ASL Return operator is used to return an
10066 -------------------------------------------
10067 Summary of changes for this label: 07_28_00
10069 Fixed a problem with the way addresses were calculated in
10070 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
10071 manifested itself when a Field was created with WordAccess or
10072 DwordAccess, but the field unit defined within the Field was less
10074 than a Word or Dword.
10076 Fixed a problem in AmlDumpOperands() module's loop to pull
10077 operands off of the operand stack to display information. The
10078 problem manifested itself as a TLB error on 64-bit systems when
10079 accessing an operand stack with two or more operands.
10081 Fixed a problem with the PCI configuration space handlers where
10082 context was getting confused between accesses. This required a
10083 change to the generic address space handler and address space
10084 setup definitions. Handlers now get both a global handler context
10085 (this is the one passed in by the user when executing
10086 AcpiInstallAddressSpaceHandler() and a specific region context
10087 that is unique to each region (For example, the _ADR, _SEG and
10088 _BBN values associated with a specific region). The generic
10089 function definitions have changed to the following:
10091 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
10092 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
10093 *HandlerContext, // This used to be void *Context void
10094 *RegionContext); // This is an additional parameter
10096 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
10097 RegionHandle, UINT32 Function, void *HandlerContext, void
10098 **RegionContext); // This used to be **ReturnContext
10100 -------------------------------------------
10101 Summary of changes for this label: 07_21_00
10103 Major file consolidation and rename. All files within the
10104 interpreter have been renamed as well as most header files. This
10105 was done to prevent collisions with existing files in the host
10106 OSs -- filenames such as "config.h" and "global.h" seem to be
10107 quite common. The VC project files have been updated. All
10108 makefiles will require modification.
10110 The parser/interpreter integration continues in Phase 5 with the
10111 implementation of a complete 2-pass parse (the AML is parsed
10112 twice) for each table; This avoids the construction of a huge
10113 parse tree and therefore reduces the amount of dynamic memory
10114 required by the subsystem. Greater use of the parse object cache
10115 means that performance is unaffected.
10117 Many comments from the two code reviews have been rolled in.
10119 The 64-bit alignment support is complete.
10121 -------------------------------------------
10122 Summary of changes for this label: 06_30_00
10124 With a nod and a tip of the hat to the technology of yesteryear,
10125 we've added support in the source code for 80 column output
10126 devices. The code is now mostly constrained to 80 columns or
10127 less to support environments and editors that 1) cannot display
10128 or print more than 80 characters on a single line, and 2) cannot
10129 disable line wrapping.
10131 A major restructuring of the namespace data structure has been
10132 completed. The result is 1) cleaner and more
10133 understandable/maintainable code, and 2) a significant reduction
10134 in the dynamic memory requirement for each named ACPI object
10137 -------------------------------------------
10138 Summary of changes for this label: 06_23_00
10140 Linux support has been added. In order to obtain approval to get
10141 the ACPI CA subsystem into the Linux kernel, we've had to make
10142 quite a few changes to the base subsystem that will affect all
10143 users (all the changes are generic and OS- independent). The
10144 effects of these global changes have been somewhat far reaching.
10145 Files have been merged and/or renamed and interfaces have been
10146 renamed. The major changes are described below.
10148 Osd* interfaces renamed to AcpiOs* to eliminate namespace
10149 pollution/confusion within our target kernels. All OSD
10150 interfaces must be modified to match the new naming convention.
10152 Files merged across the subsystem. A number of the smaller source
10153 and header files have been merged to reduce the file count and
10154 increase the density of the existing files. There are too many
10155 to list here. In general, makefiles that call out individual
10156 files will require rebuilding.
10158 Interpreter files renamed. All interpreter files now have the
10159 prefix am* instead of ie* and is*.
10161 Header files renamed: The acapi.h file is now acpixf.h. The
10162 acpiosd.h file is now acpiosxf.h. We are removing references to
10163 the acronym "API" since it is somewhat windowsy. The new name is
10164 "external interface" or xface or xf in the filenames.j
10167 All manifest constants have been forced to upper case (some were
10168 mixed case.) Also, the string "ACPI_" has been prepended to many
10169 (not all) of the constants, typedefs, and structs.
10171 The globals "DebugLevel" and "DebugLayer" have been renamed
10172 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
10174 All other globals within the subsystem are now prefixed with
10175 "AcpiGbl_" Internal procedures within the subsystem are now
10176 prefixed with "Acpi" (with only a few exceptions). The original
10177 two-letter abbreviation for the subcomponent remains after "Acpi"
10178 - for example, CmCallocate became AcpiCmCallocate.
10180 Added a source code translation/conversion utility. Used to
10181 generate the Linux source code, it can be modified to generate
10182 other types of source as well. Can also be used to cleanup
10183 existing source by removing extraneous spaces and blank lines.
10184 Found in tools/acpisrc/*
10186 OsdUnMapMemory was renamed to OsdUnmapMemory and then
10187 AcpiOsUnmapMemory. (UnMap became Unmap).
10189 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
10190 When set to one, this indicates that the caller wants to use the
10192 semaphore as a mutex, not a counting semaphore. ACPI CA uses
10193 both types. However, implementers of this call may want to use
10194 different OS primitives depending on the type of semaphore
10195 requested. For example, some operating systems provide separate
10197 "mutex" and "semaphore" interfaces - where the mutex interface is
10198 much faster because it doesn't have all the overhead of a full
10199 semaphore implementation.
10201 Fixed a deadlock problem where a method that accesses the PCI
10202 address space can block forever if it is the first access to the
10205 -------------------------------------------
10206 Summary of changes for this label: 06_02_00
10208 Support for environments that cannot handle unaligned data
10209 accesses (e.g. firmware and OS environments devoid of alignment
10210 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
10211 been added (via configurable macros) in these three areas: -
10212 Transfer of data from the raw AML byte stream is done via byte
10213 moves instead of word/dword/qword moves. - External objects are
10214 aligned within the user buffer, including package elements (sub-
10215 objects). - Conversion of name strings to UINT32 Acpi Names is now
10218 The Store operator was modified to mimic Microsoft's
10219 implementation when storing to a Buffer Field.
10221 Added a check of the BM_STS bit before entering C3.
10223 The methods subdirectory has been obsoleted and removed. A new
10224 file, cmeval.c subsumes the functionality.
10226 A 16-bit (DOS) version of AcpiExec has been developed. The
10227 makefile is under the acpiexec directory.