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23 June 2011. Summary of changes for version 20110623:

1) ACPI CA Core Subsystem:

Updated the predefined name repair mechanism to not attempt repair of a _TSS

return object if a _PSS object is present. We can only sort the _TSS return

package if there is no _PSS within the same scope. This is because if _PSS is

present, the ACPI specification dictates that the _TSS Power Dissipation field

is to be ignored, and therefore some BIOSs leave garbage values in the _TSS

Power field(s). In this case, it is best to just return the _TSS package as-

is. Reported by, and fixed with assistance from Fenghua Yu.

Added an option to globally disable the control method return value validation

and repair. This runtime option can be used to disable return value repair if

this is causing a problem on a particular machine. Also added an option to

AcpiExec (-dr) to set this disable flag.

All makefiles and project files: Major changes to improve generation of ACPICA

tools. ACPICA BZ 912:

    Reduce default optimization levels to improve compatibility

    For Linux, add strict-aliasing=0 for gcc 4

    Cleanup and simplify use of command line defines

    Cleanup multithread library support

    Improve usage messages

Linux-specific header: update handling of THREAD_ID and pthread. For the 32-

bit case, improve casting to eliminate possible warnings, especially with the

acpica tools.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug

version of the code includes the debug output trace mechanism and has a much

larger code and data size.

  Previous Release (VC 9.0):

    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total

    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total

  Current Release (VC 9.0):

    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total

    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total

2) iASL Compiler/Disassembler and Tools:

With this release, a new utility named "acpihelp" has been added to the ACPICA

package. This utility summarizes the ACPI specification chapters for the ASL

and AML languages. It generates under Linux/Unix as well as Windows, and

provides the following functionality:

    Find/display ASL operator(s) -- with description and syntax.

    Find/display ASL keyword(s) -- with exact spelling and descriptions.

    Find/display ACPI predefined name(s) -- with description, number

        of arguments, and the return value data type.

    Find/display AML opcode name(s) -- with opcode, arguments, and grammar.

    Decode/display AML opcode -- with opcode name, arguments, and grammar.

Service Layers: Make multi-thread support configurable. Conditionally compile

the multi-thread support so that threading libraries will not be linked if not

necessary. The only tool that requires multi-thread support is AcpiExec.

iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions of

Bison appear to want the interface to yyerror to be a const char * (or at

least this is a problem when generating iASL on some systems.) ACPICA BZ 923

Pierre Lejeune.

Tools: Fix for systems where O_BINARY is not defined. Only used for Windows

versions of the tools.

----------------------------------------

27 May 2011. Summary of changes for version 20110527:

1) ACPI CA Core Subsystem:

ASL Load() operator: Reinstate most restrictions on the incoming ACPI table

signature. Now, only allow SSDT, OEMx, and a null signature. History:

    1) Originally, we checked the table signature for "SSDT" or "PSDT".

       (PSDT is now obsolete.)

    2) We added support for OEMx tables, signature "OEM" plus a fourth

       "don't care" character.

    3) Valid tables were encountered with a null signature, so we just

       gave up on validating the signature, (05/2008).

    4) We encountered non-AML tables such as the MADT, which caused

       interpreter errors and kernel faults. So now, we once again allow

       only SSDT, OEMx, and now, also a null signature. (05/2011).

Added the missing _TDL predefined name to the global name list in order to

enable validation. Affects both the core ACPICA code and the iASL compiler.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug

version of the code includes the debug output trace mechanism and has a much

larger code and data size.

  Previous Release (VC 9.0):

    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total

    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total

  Current Release (VC 9.0):

    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total

    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total

2) iASL Compiler/Disassembler and Tools:

Debugger/AcpiExec: Implemented support for "complex" method arguments on the

debugger command line. This adds support beyond simple integers -- including

Strings, Buffers, and Packages. Includes support for nested packages.

Increased the default command line buffer size to accommodate these arguments.

See the ACPICA reference for details and syntax. ACPICA BZ 917.

Debugger/AcpiExec: Implemented support for "default" method arguments for the

Execute/Debug command. Now, the debugger will always invoke a control method

with the required number of arguments -- even if the command line specifies

none or insufficient arguments. It uses default integer values for any missing

arguments. Also fixes a bug where only six method arguments maximum were

supported instead of the required seven.

Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine and

also return status in order to prevent buffer overruns. See the ACPICA

reference for details and syntax. ACPICA BZ 921

iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and

makefiles to simplify support for the two different but similar parser

generators, bison and yacc.

Updated the generic unix makefile for gcc 4. The default gcc version is now

expected to be 4 or greater, since options specific to gcc 4 are used.

----------------------------------------

13 April 2011. Summary of changes for version 20110413:

1) ACPI CA Core Subsystem:

Implemented support to execute a so-called "orphan" _REG method under the EC

device. This change will force the execution of a _REG method underneath the

EC

device even if there is no corresponding operation region of type

EmbeddedControl. Fixes a problem seen on some machines and apparently is

compatible with Windows behavior. ACPICA BZ 875.

Added more predefined methods that are eligible for automatic NULL package

element removal. This change adds another group of predefined names to the

list

of names that can be repaired by having NULL package elements dynamically

removed. This group are those methods that return a single variable-length

package containing simple data types such as integers, buffers, strings. This

includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx, _PSL,

_Sx,

and _TZD. ACPICA BZ 914.

Split and segregated all internal global lock functions to a new file,

evglock.c.

Updated internal address SpaceID for DataTable regions. Moved this internal

space

id in preparation for ACPI 5.0 changes that will include some new space IDs.

This

change should not affect user/host code.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib

produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of

the code includes the debug output trace mechanism and has a much larger code

and

data size.

  Previous Release (VC 9.0):

    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total

    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total

  Current Release (VC 9.0):

    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total

    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL/DTC: Major update for new grammar features. Allow generic data types in

custom ACPI tables. Field names are now optional. Any line can be split to

multiple lines using the continuation char (\). Large buffers now use line-

continuation character(s) and no colon on the continuation lines. See the

grammar

update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob Moore.

iASL: Mark ASL "Return()" and the simple "Return" as "Null" return statements.

Since the parser stuffs a "zero" as the return value for these statements (due

to

the underlying AML grammar), they were seen as "return with value" by the iASL

semantic checking. They are now seen correctly as "null" return statements.

iASL: Check if a_REG declaration has a corresponding Operation Region. Adds a

check for each _REG to ensure that there is in fact a corresponding operation

region declaration in the same scope. If not, the _REG method is not very

useful

since it probably won't be executed. ACPICA BZ 915.

iASL/DTC: Finish support for expression evaluation. Added a new expression

parser

that implements c-style operator precedence and parenthesization. ACPICA

bugzilla

908.

Disassembler/DTC: Remove support for () and <> style comments in data tables.

Now

that DTC has full expression support, we don't want to have comment strings

that

start with a parentheses or a less-than symbol. Now, only the standard /* and

//

comments are supported, as well as the bracket [] comments.

AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have

"unusual"

headers in the acpidump file. Update the header validation to support these

tables. Problem introduced in previous AcpiXtract version in the change to

support "wrong checksum" error messages emitted by acpidump utility.

iASL: Add a * option to generate all template files (as a synonym for ALL) as

in

"iasl -T *" or "iasl -T ALL".

iASL/DTC: Do not abort compiler on fatal errors. We do not want to completely

abort the compiler on "fatal" errors, simply should abort the current compile.

This allows multiple compiles with a single (possibly wildcard) compiler

invocation.

----------------------------------------

16 March 2011. Summary of changes for version 20110316:

1) ACPI CA Core Subsystem:

Fixed a problem caused by a _PRW method appearing at the namespace root scope

during the setup of wake GPEs. A fault could occur if a _PRW directly under

the

root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.

Implemented support for "spurious" Global Lock interrupts. On some systems, a

global lock interrupt can occur without the pending flag being set. Upon a GL

interrupt, we now ensure that a thread is actually waiting for the lock before

signaling GL availability. Rafael Wysocki, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib

produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of

the code includes the debug output trace mechanism and has a much larger code

and

data size.

  Previous Release (VC 9.0):

    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total

    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total

  Current Release (VC 9.0):

    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total

    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total

2) iASL Compiler/Disassembler and Tools:

Implemented full support for the "SLIC" ACPI table. Includes support in the

header files, disassembler, table compiler, and template generator. Bob Moore,

Lin Ming.

AcpiXtract: Correctly handle embedded comments and messages from AcpiDump.

Apparently some or all versions of acpidump will occasionally emit a comment

like

"Wrong checksum", etc., into the dump file. This was causing problems for

AcpiXtract. ACPICA BZ 905.

iASL: Fix the Linux makefile by removing an inadvertent double file inclusion.

ACPICA BZ 913.

AcpiExec: Update installation of operation region handlers. Install one

handler

for a user-defined address space. This is used by the ASL test suite (ASLTS).

----------------------------------------

11 February 2011. Summary of changes for version 20110211:

1) ACPI CA Core Subsystem:

Added a mechanism to defer _REG methods for some early-installed handlers.

Most user handlers should be installed before call to AcpiEnableSubsystem.

However, Event handlers and region handlers should be installed after

AcpiInitializeObjects. Override handlers for the "default" regions should be

installed early, however. This change executes all _REG methods for the

default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any

chicken/egg issues between them. ACPICA BZ 848.

Implemented an optimization for GPE detection. This optimization will simply

ignore GPE registers that contain no enabled GPEs -- there is no need to

read the register since this information is available internally. This

becomes more important on machines with a large GPE space. ACPICA bugzilla

884. Lin Ming. Suggestion from Joe Liu.

Removed all use of the highly unreliable FADT revision field. The revision

number in the FADT has been found to be completely unreliable and cannot be

trusted. Only the actual table length can be used to infer the version. This

change updates the ACPICA core and the disassembler so that both no longer

even look at the FADT version and instead depend solely upon the FADT

length.

Fix an unresolved name issue for the no-debug and no-error-message source

generation cases. The _AcpiModuleName was left undefined in these cases, but

it is actually needed as a parameter to some interfaces. Define

_AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.

Split several large files (makefiles and project files updated)

  utglobal.c   -> utdecode.c

  dbcomds.c    -> dbmethod.c dbnames.c

  dsopcode.c   -> dsargs.c dscontrol.c

  dsload.c     -> dsload2.c

  aslanalyze.c -> aslbtypes.c aslwalks.c

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has

a much larger code and data size.

  Previous Release (VC 9.0):

    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total

    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total

  Current Release (VC 9.0):

    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total

    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.

These are useful C-style macros with the standard definitions. ACPICA

bugzilla 898.

iASL/DTC: Added support for integer expressions and labels. Support for full

expressions for all integer fields in all ACPI tables. Support for labels in

"generic" portions of tables such as UEFI. See the iASL reference manual.

Debugger: Added a command to display the status of global handlers. The

"handlers" command will display op region, fixed event, and miscellaneous

global handlers. installation status -- and for op regions, whether default

or user-installed handler will be used.

iASL: Warn if reserved method incorrectly returns a value. Many predefined

names are defined such that they do not return a value. If implemented as a

method, issue a warning if such a name explicitly returns a value. ACPICA

Bugzilla 855.

iASL: Added detection of GPE method name conflicts. Detects a conflict where

there are two GPE methods of the form _Lxy and _Exy in the same scope. (For

example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.

iASL/DTC: Fixed a couple input scanner issues with comments and line

numbers. Comment remover could get confused and miss a comment ending. Fixed

a problem with line counter maintenance.

iASL/DTC: Reduced the severity of some errors from fatal to error. There is

no need to abort on simple errors within a field definition.

Debugger: Simplified the output of the help command. All help output now in

a single screen, instead of help subcommands. ACPICA Bugzilla 897.

----------------------------------------

12 January 2011. Summary of changes for version 20110112:

1) ACPI CA Core Subsystem:

Fixed a race condition between method execution and namespace walks that can

possibly cause a fault. The problem was apparently introduced in version

20100528 as a result of a performance optimization that reduces the number of

namespace walks upon method exit by using the delete_namespace_subtree

function instead of the delete_namespace_by_owner function used previously.

Bug is a missing namespace lock in the delete_namespace_subtree function.

dana.myers@oracle.com

Fixed several issues and a possible fault with the automatic "serialized"

method support. History: This support changes a method to "serialized" on the

fly if the method generates an AE_ALREADY_EXISTS error, indicating the

possibility that it cannot handle reentrancy. This fix repairs a couple of

issues seen in the field, especially on machines with many cores:

    1) Delete method children only upon the exit of the last thread,

       so as to not delete objects out from under other running threads

      (and possibly causing a fault.)

    2) Set the "serialized" bit for the method only upon the exit of the

       Last thread, so as to not cause deadlock when running threads

       attempt to exit.

    3) Cleanup the use of the AML "MethodFlags" and internal method flags

       so that there is no longer any confusion between the two.

    Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.

Debugger: Now lock the namespace for duration of a namespace dump. Prevents

issues if the namespace is changing dynamically underneath the debugger.

Especially affects temporary namespace nodes, since the debugger displays

these also.

Updated the ordering of include files. The ACPICA headers should appear

before any compiler-specific headers (stdio.h, etc.) so that acenv.h can set

any necessary compiler-specific defines, etc. Affects the ACPI-related tools

and utilities.

Updated all ACPICA copyrights and signons to 2011. Added the 2011 copyright

to all module headers and signons, including the Linux header. This affects

virtually every file in the ACPICA core subsystem, iASL compiler, and all

utilities.

Added project files for MS Visual Studio 2008 (VC++ 9.0). The original

project files for VC++ 6.0 are now obsolete. New project files can be found

under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for

details.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release (VC 6.0):

    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total

    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total

  Current Release (VC 9.0):

    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total

    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Added generic data types to the Data Table compiler. Add "generic" data

types such as UINT32, String, Unicode, etc., to simplify the generation of

platform-defined tables such as UEFI. Lin Ming.

iASL: Added listing support for the Data Table Compiler. Adds listing support

(-l) to display actual binary output for each line of input code.

----------------------------------------

09 December 2010. Summary of changes for version 20101209:

1) ACPI CA Core Subsystem:

Completed the major overhaul of the GPE support code that was begun in July

2010. Major features include: removal of _PRW execution in ACPICA (host

executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,

changes to existing interfaces, simplification of GPE handler operation, and

a handful of new interfaces:

    AcpiUpdateAllGpes

    AcpiFinishGpe

    AcpiSetupGpeForWake

    AcpiSetGpeWakeMask

    One new file, evxfgpe.c to consolidate all external GPE interfaces.

See the ACPICA Programmer Reference for full details and programming

information. See the new section 4.4 "General Purpose Event (GPE) Support"

for a full overview, and section 8.7 "ACPI General Purpose Event Management"

for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin Ming,

Bob Moore, Rafael Wysocki.

Implemented a new GPE feature for Windows compatibility, the "Implicit Wake

GPE Notify". This feature will automatically issue a Notify(2) on a device

when a Wake GPE is received if there is no corresponding GPE method or

handler. ACPICA BZ 870.

Fixed a problem with the Scope() operator during table parse and load phase.

During load phase (table load or method execution), the scope operator should

not enter the target into the namespace. Instead, it should open a new scope

at the target location. Linux BZ 19462, ACPICA BZ 882.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total

    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total

  Current Release:

    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total

    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Relax the alphanumeric restriction on _CID strings. These strings are

"bus-specific" per the ACPI specification, and therefore any characters are

acceptable. The only checks that can be performed are for a null string and

perhaps for a leading asterisk. ACPICA BZ 886.

iASL: Fixed a problem where a syntax error that caused a premature EOF

condition on the source file emitted a very confusing error message. The

premature EOF is now detected correctly. ACPICA BZ 891.

Disassembler: Decode the AccessSize within a Generic Address Structure (byte

access, word access, etc.) Note, this field does not allow arbitrary bit

access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.

New: AcpiNames utility - Example namespace dump utility. Shows an example of

ACPICA configuration for a minimal namespace dump utility. Uses table and

namespace managers, but no AML interpreter. Does not add any functionality

over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to

partition and configure ACPICA. ACPICA BZ 883.

AML Debugger: Increased the debugger buffer size for method return objects.

Was 4K, increased to 16K. Also enhanced error messages for debugger method

execution, including the buffer overflow case.

----------------------------------------

13 October 2010. Summary of changes for version 20101013:

1) ACPI CA Core Subsystem:

Added support to clear the PCIEXP_WAKE event. When clearing ACPI events, now

clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via

HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.

Changed the type of the predefined namespace object _TZ from ThermalZone to

Device. This was found to be confusing to the host software that processes

the various thermal zones, since _TZ is not really a ThermalZone. However, a

Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui

Zhang.

Added Windows Vista SP2 to the list of supported _OSI strings. The actual

string is "Windows 2006 SP2".

Eliminated duplicate code in AcpiUtExecute* functions. Now that the nsrepair

code automatically repairs _HID-related strings, this type of code is no

longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ 878.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total

    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

  Current Release:

    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total

    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented additional compile-time validation for _HID strings. The

non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the length of

the string must be exactly seven or eight characters. For both _HID and _CID

strings, all characters must be alphanumeric. ACPICA BZ 874.

iASL: Allow certain "null" resource descriptors. Some BIOS code creates

descriptors that are mostly or all zeros, with the expectation that they will

be filled in at runtime. iASL now allows this as long as there is a "resource

tag" (name) associated with the descriptor, which gives the ASL a handle

needed to modify the descriptor. ACPICA BZ 873.

Added single-thread support to the generic Unix application OSL. Primarily

for iASL support, this change removes the use of semaphores in the single-

threaded ACPICA tools/applications - increasing performance. The

_MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED

option. ACPICA BZ 879.

AcpiExec: several fixes for the 64-bit version. Adds XSDT support and support

for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.

iASL: Moved all compiler messages to a new file, aslmessages.h.

----------------------------------------

15 September 2010. Summary of changes for version 20100915:

1) ACPI CA Core Subsystem:

Removed the AcpiOsDerivePciId OSL interface. The various host implementations

of this function were not OS-dependent and are now obsolete and can be

removed from all host OSLs. This function has been replaced by

AcpiHwDerivePciId, which is now part of the ACPICA core code.

AcpiHwDerivePciId has been implemented without recursion. Adds one new

module, hwpci.c. ACPICA BZ 857.

Implemented a dynamic repair for _HID and _CID strings. The following

problems are now repaired at runtime: 1) Remove a leading asterisk in the

string, and 2) the entire string is uppercased. Both repairs are in

accordance with the ACPI specification and will simplify host driver code.

ACPICA BZ 871.

The ACPI_THREAD_ID type is no longer configurable, internally it is now

always UINT64. This simplifies the ACPICA code, especially any printf output.

UINT64 is the only common data type for all thread_id types across all

operating systems. It is now up to the host OSL to cast the native thread_id

type to UINT64 before returning the value to ACPICA (via AcpiOsGetThreadId).

Lin Ming, Bob Moore.

Added the ACPI_INLINE type to enhance the ACPICA configuration. The "inline"

keyword is not standard across compilers, and this type allows inline to be

configured on a per-compiler basis. Lin Ming.

Made the system global AcpiGbl_SystemAwakeAndRunning publically available.

Added an extern for this boolean in acpixf.h. Some hosts utilize this value

during suspend/restore operations. ACPICA BZ 869.

All code that implements error/warning messages with the "ACPI:" prefix has

been moved to a new module, utxferror.c.

The UINT64_OVERLAY was moved to utmath.c, which is the only module where it

is used. ACPICA BZ 829. Lin Ming, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total

    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total

  Current Release:

    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total

    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL/Disassembler: Write ACPI errors to stderr instead of the output file.

This keeps the output files free of random error messages that may originate

from within the namespace/interpreter code. Used this opportunity to merge

all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ

866. Lin Ming, Bob Moore.

Tools: update some printfs for ansi warnings on size_t. Handle width change

of size_t on 32-bit versus 64-bit generations. Lin Ming.

----------------------------------------

06 August 2010. Summary of changes for version 20100806:

1) ACPI CA Core Subsystem:

Designed and implemented a new host interface to the _OSI support code. This

will allow the host to dynamically add or remove multiple _OSI strings, as

well as install an optional handler that is called for each _OSI invocation.

Also added a new AML debugger command, 'osi' to display and modify the global

_OSI string table, and test support in the AcpiExec utility. See the ACPICA

reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.

New Functions:

    AcpiInstallInterface - Add an _OSI string.

    AcpiRemoveInterface - Delete an _OSI string.

    AcpiInstallInterfaceHandler - Install optional _OSI handler.

Obsolete Functions:

    AcpiOsValidateInterface - no longer used.

New Files:

    source/components/utilities/utosi.c

Re-introduced the support to enable multi-byte transfers for Embedded

Controller (EC) operation regions. A reported problem was found to be a bug

in the host OS, not in the multi-byte support. Previously, the maximum data

size passed to the EC operation region handler was a single byte. There are

often EC Fields larger than one byte that need to be transferred, and it is

useful for the EC driver to lock these as a single transaction. This change

enables single transfers larger than 8 bits. This effectively changes the

access to the EC space from ByteAcc to AnyAcc, and will probably require

changes to the host OS Embedded Controller driver to enable 16/32/64/256-bit

transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.

Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The

prototype in acpiosxf.h had the output value pointer as a (void *).

It should be a (UINT64 *). This may affect some host OSL code.

Fixed a couple problems with the recently modified Linux makefiles for iASL

and AcpiExec. These new makefiles place the generated object files in the

local directory so that there can be no collisions between the files that are

shared between them that are compiled with different options.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total

    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total

  Current Release:

    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total

    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total

2) iASL Compiler/Disassembler and Tools:

iASL/Disassembler: Added a new option (-da, "disassemble all") to load the

namespace from and disassemble an entire group of AML files. Useful for

loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn) and

disassembling with one simple command. ACPICA BZ 865. Lin Ming.

iASL: Allow multiple invocations of -e option. This change allows multiple

uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ 834.

Lin Ming.

----------------------------------------

02 July 2010. Summary of changes for version 20100702:

1) ACPI CA Core Subsystem:

Implemented several updates to the recently added GPE reference count

support. The model for "wake" GPEs is changing to give the host OS complete

control of these GPEs. Eventually, the ACPICA core will not execute any _PRW

methods, since the host already must execute them. Also, additional changes

were made to help ensure that the reference counts are kept in proper

synchronization with reality. Rafael J. Wysocki.

1) Ensure that GPEs are not enabled twice during initialization.

2) Ensure that GPE enable masks stay in sync with the reference count.

3) Do not inadvertently enable GPEs when writing GPE registers.

4) Remove the internal wake reference counter and add new AcpiGpeWakeup

interface. This interface will set or clear individual GPEs for wakeup.

5) Remove GpeType argument from AcpiEnable and AcpiDisable. These interfaces

are now used for "runtime" GPEs only.

Changed the behavior of the GPE install/remove handler interfaces. The GPE is

no longer disabled during this process, as it was found to cause problems on

some machines. Rafael J. Wysocki.

Reverted a change introduced in version 20100528 to enable Embedded

Controller multi-byte transfers. This change was found to cause problems with

Index Fields and possibly Bank Fields. It will be reintroduced when these

problems have been resolved.

Fixed a problem with references to Alias objects within Package Objects. A

reference to an Alias within the definition of a Package was not always

resolved properly. Aliases to objects like Processors, Thermal zones, etc.

were resolved to the actual object instead of a reference to the object as it

should be. Package objects are only allowed to contain integer, string,

buffer, package, and reference objects. Redhat bugzilla 608648.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total

    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total

  Current Release:

    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total

    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented a new compiler subsystem to allow definition and

compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc. These

are called "ACPI Data Tables", and the new compiler is the "Data Table

Compiler". This compiler is intended to simplify the existing error-prone

process of creating these tables for the BIOS, as well as allowing the

disassembly, modification, recompilation, and override of existing ACPI data

tables. See the iASL User Guide for detailed information.

iASL: Implemented a new Template Generator option in support of the new Data

Table Compiler. This option will create examples of all known ACPI tables

that can be used as the basis for table development. See the iASL

documentation and the -T option.

Disassembler and headers: Added support for the WDDT ACPI table (Watchdog

Descriptor Table).

Updated the Linux makefiles for iASL and AcpiExec to place the generated

object files in the local directory so that there can be no collisions

between the shared files between them that are generated with different

options.

Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec. Use

the #define __APPLE__ to enable this support.

----------------------------------------

28 May 2010. Summary of changes for version 20100528:

Note: The ACPI 4.0a specification was released on April 5, 2010 and is

available at www.acpi.info. This is primarily an errata release.

1) ACPI CA Core Subsystem:

Undefined ACPI tables: We are looking for the definitions for the following

ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.

Implemented support to enable multi-byte transfers for Embedded Controller

(EC) operation regions. Previously, the maximum data size passed to the EC

operation region handler was a single byte. There are often EC Fields larger

than one byte that need to be transferred, and it is useful for the EC driver

to lock these as a single transaction. This change enables single transfers

larger than 8 bits. This effectively changes the access to the EC space from

ByteAcc to AnyAcc, and will probably require changes to the host OS Embedded

Controller driver to enable 16/32/64/256-bit transfers in addition to 8-bit

transfers. Alexey Starikovskiy, Lin Ming

Implemented a performance enhancement for namespace search and access. This

change enhances the performance of namespace searches and walks by adding a

backpointer to the parent in each namespace node. On large namespaces, this

change can improve overall ACPI performance by up to 9X. Adding a pointer to

each namespace node increases the overall size of the internal namespace by

about 5%, since each namespace entry usually consists of both a namespace

node and an ACPI operand object. However, this is the first growth of the

namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.

Implemented a performance optimization that reduces the number of namespace

walks. On control method exit, only walk the namespace if the method is known

to have created namespace objects outside of its local scope. Previously, the

entire namespace was traversed on each control method exit. This change can

improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob Moore.

Added support to truncate I/O addresses to 16 bits for Windows compatibility.

Some ASL code has been seen in the field that inadvertently has bits set

above bit 15. This feature is optional and is enabled if the BIOS requests

any Windows OSI strings. It can also be enabled by the host OS. Matthew

Garrett, Bob Moore.

Added support to limit the maximum time for the ASL Sleep() operator. To

prevent accidental deep sleeps, limit the maximum time that Sleep() will

actually sleep. Configurable, the default maximum is two seconds. ACPICA

bugzilla 854.

Added run-time validation support for the _WDG and_WED Microsoft predefined

methods. These objects are defined by "Windows Instrumentation", and are not

part of the ACPI spec. ACPICA BZ 860.

Expanded all statistic counters used during namespace and device

initialization from 16 to 32 bits in order to support very large namespaces.

Replaced all instances of %d in printf format specifiers with %u since nearly

all integers in ACPICA are unsigned.

Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly returned

as AE_NO_HANDLER.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total

    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total

  Current Release:

    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total

    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Added compiler support for the _WDG and_WED Microsoft predefined

methods. These objects are defined by "Windows Instrumentation", and are not

part of the ACPI spec. ACPICA BZ 860.

AcpiExec: added option to disable the memory tracking mechanism. The -dt

option will disable the tracking mechanism, which improves performance

considerably.

AcpiExec: Restructured the command line options into -d (disable) and -e

(enable) options.

----------------------------------------

28 April 2010. Summary of changes for version 20100428:

1) ACPI CA Core Subsystem:

Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,

including FADT-based and GPE Block Devices, execute any _PRW methods in the

new table, and process any _Lxx/_Exx GPE methods in the new table. Any

runtime GPE that is referenced by an _Lxx/_Exx method in the new table is

immediately enabled. Handles the FADT-defined GPEs as well as GPE Block

Devices. Provides compatibility with other ACPI implementations. Two new

files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob Moore.

Fixed a regression introduced in version 20100331 within the table manager

where initial table loading could fail. This was introduced in the fix for

AcpiReallocateRootTable. Also, renamed some of fields in the table manager

data structures to clarify their meaning and use.

Fixed a possible allocation overrun during internal object copy in

AcpiUtCopySimpleObject. The original code did not correctly handle the case

where the object to be copied was a namespace node. Lin Ming. ACPICA BZ 847.

Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a

possible access beyond end-of-allocation. Also, now fully validate descriptor

(size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total

    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total

  Current Release:

    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total

    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented Min/Max/Len/Gran validation for address resource

descriptors. This change implements validation for the address fields that

are common to all address-type resource descriptors. These checks are

implemented: Checks for valid Min/Max, length within the Min/Max window,

valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as per

table 6-40 in the ACPI 4.0a specification. Also split the large aslrestype1.c

and aslrestype2.c files into five new files. ACPICA BZ 840.

iASL: Added support for the _Wxx predefined names. This support was missing

and these names were not recognized by the compiler as valid predefined

names. ACPICA BZ 851.

iASL: Added an error for all predefined names that are defined to return no

value and thus must be implemented as Control Methods. These include all of

the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous

names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.

iASL: Implemented the -ts option to emit hex AML data in ASL format, as an

ASL Buffer. Allows ACPI tables to be easily included within ASL files, to be

dynamically loaded via the Load() operator. Also cleaned up output for the -

ta and -tc options. ACPICA BZ 853.

Tests: Added a new file with examples of extended iASL error checking.

Demonstrates the advanced error checking ability of the iASL compiler.

Available at tests/misc/badcode.asl.

----------------------------------------

31 March 2010. Summary of changes for version 20100331:

1) ACPI CA Core Subsystem:

Completed a major update for the GPE support in order to improve support for

shared GPEs and to simplify both host OS and ACPICA code. Added a reference

count mechanism to support shared GPEs that require multiple device drivers.

Several external interfaces have changed. One external interface has been

removed. One new external interface was added. Most of the GPE external

interfaces now use the GPE spinlock instead of the events mutex (and the

Flags parameter for many GPE interfaces has been removed.) See the updated

ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, Rafael

Wysocki. ACPICA BZ 831.

Changed:

    AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus

Removed:

    AcpiSetGpeType

New:

    AcpiSetGpe

Implemented write support for DataTable operation regions. These regions are

defined via the DataTableRegion() operator. Previously, only read support was

implemented. The ACPI specification allows DataTableRegions to be read/write,

however.

Implemented a new subsystem option to force a copy of the DSDT to local

memory. Optionally copy the entire DSDT to local memory (instead of simply

mapping it.) There are some (albeit very rare) BIOSs that corrupt or replace

the original DSDT, creating the need for this option. Default is FALSE, do

not copy the DSDT.

Implemented detection of a corrupted or replaced DSDT. This change adds

support to detect a DSDT that has been corrupted and/or replaced from outside

the OS (by firmware). This is typically catastrophic for the system, but has

been seen on some machines. Once this problem has been detected, the DSDT

copy option can be enabled via system configuration. Lin Ming, Bob Moore.

Fixed two problems with AcpiReallocateRootTable during the root table copy.

When copying the root table to the new allocation, the length used was

incorrect. The new size was used instead of the current table size, meaning

too much data was copied. Also, the count of available slots for ACPI tables

was not set correctly. Alexey Starikovskiy, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total

    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total

  Current Release:

    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total

    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implement limited typechecking for values returned from predefined

control methods. The type of any returned static (unnamed) object is now

validated. For example, Return(1). ACPICA BZ 786.

iASL: Fixed a predefined name object verification regression. Fixes a problem

introduced in version 20100304. An error is incorrectly generated if a

predefined name is declared as a static named object with a value defined

using the keywords "Zero", "One", or "Ones". Lin Ming.

iASL: Added Windows 7 support for the -g option (get local ACPI tables) by

reducing the requested registry access rights. ACPICA BZ 842.

Disassembler: fixed a possible fault when generating External() statements.

Introduced in commit ae7d6fd: Properly handle externals with parent-prefix

(carat). Fixes a string length allocation calculation. Lin Ming.

----------------------------------------

04 March 2010. Summary of changes for version 20100304:

1) ACPI CA Core Subsystem:

Fixed a possible problem with the AML Mutex handling function

AcpiExReleaseMutex where the function could fault under the very rare

condition when the interpreter has blocked, the interpreter lock is released,

the interpreter is then reentered via the same thread, and attempts to

acquire an AML mutex that was previously acquired. FreeBSD report 140979. Lin

Ming.

Implemented additional configuration support for the AML "Debug Object".

Output from the debug object can now be enabled via a global variable,

AcpiGbl_EnableAmlDebugObject. This will assist with remote machine debugging.

This debug output is now available in the release version of ACPICA instead

of just the debug version. Also, the entire debug output module can now be

configured out of the ACPICA build if desired. One new file added,

executer/exdebug.c. Lin Ming, Bob Moore.

Added header support for the ACPI MCHI table (Management Controller Host

Interface Table). This table was added in ACPI 4.0, but the defining document

has only recently become available.

Standardized output of integer values for ACPICA warnings/errors. Always use

0x prefix for hex output, always use %u for unsigned integer decimal output.

Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400

invocations.) These invocations were converted from the original

ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total

    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total

  Current Release:

    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total

    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented typechecking support for static (non-control method)

predefined named objects that are declared with the Name() operator. For

example, the type of this object is now validated to be of type Integer:

Name(_BBN, 1). This change migrates the compiler to using the core predefined

name table instead of maintaining a local version. Added a new file,

aslpredef.c. ACPICA BZ 832.

Disassembler: Added support for the ACPI 4.0 MCHI table.

----------------------------------------

21 January 2010. Summary of changes for version 20100121:

1) ACPI CA Core Subsystem:

Added the 2010 copyright to all module headers and signons. This affects

virtually every file in the ACPICA core subsystem, the iASL compiler, the

tools/utilities, and the test suites.

Implemented a change to the AcpiGetDevices interface to eliminate unnecessary

invocations of the _STA method. In the case where a specific _HID is

requested, do not run _STA until a _HID match is found. This eliminates

potentially dozens of _STA calls during a search for a particular device/HID,

which in turn can improve boot times. ACPICA BZ 828. Lin Ming.

Implemented an additional repair for predefined method return values. Attempt

to repair unexpected NULL elements within returned Package objects. Create an

Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.

ACPICA BZ 818. Lin Ming, Bob Moore.

Removed the obsolete ACPI_INTEGER data type. This type was introduced as the

code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with

64-bit AML integers). It is now obsolete and this change removes it from the

ACPICA code base, replaced by UINT64. The original typedef has been retained

for now for compatibility with existing device driver code. ACPICA BZ 824.

Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in

the parse tree object.

Added additional warning options for the gcc-4 generation. Updated the source

accordingly. This includes some code restructuring to eliminate unreachable

code, elimination of some gotos, elimination of unused return values, some

additional casting, and removal of redundant declarations.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total

    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total

  Current Release:

    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total

    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total

2) iASL Compiler/Disassembler and Tools:

No functional changes for this release.

----------------------------------------

14 December 2009. Summary of changes for version 20091214:

1) ACPI CA Core Subsystem:

Enhanced automatic data type conversions for predefined name repairs. This

change expands the automatic repairs/conversions for predefined name return

values to make Integers, Strings, and Buffers fully interchangeable. Also, a

Buffer can be converted to a Package of Integers if necessary. The nsrepair.c

module was completely restructured. Lin Ming, Bob Moore.

Implemented automatic removal of null package elements during predefined name

repairs. This change will automatically remove embedded and trailing NULL

package elements from returned package objects that are defined to contain a

variable number of sub-packages. The driver is then presented with a package

with no null elements to deal with. ACPICA BZ 819.

Implemented a repair for the predefined _FDE and _GTM names. The expected

return value for both names is a Buffer of 5 DWORDs. This repair fixes two

possible problems (both seen in the field), where a package of integers is

returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.

Implemented additional module-level code support. This change will properly

execute module-level code that is not at the root of the namespace (under a

Device object, etc.). Now executes the code within the current scope instead

of the root. ACPICA BZ 762. Lin Ming.

Fixed possible mutex acquisition errors when running _REG methods. Fixes a

problem where mutex errors can occur when running a _REG method that is in

the same scope as a method-defined operation region or an operation region

under a module-level IF block. This type of code is rare, so the problem has

not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.

Fixed a possible memory leak during module-level code execution. An object

could be leaked for each block of executed module-level code if the

interpreter slack mode is enabled This change deletes any implicitly returned

object from the module-level code block. Lin Ming.

Removed messages for successful predefined repair(s). The repair mechanism

was considered too wordy. Now, messages are only unconditionally emitted if

the return object cannot be repaired. Existing messages for successful

repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total