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diff --git a/sys/contrib/dev/acpica/CHANGES.txt b/sys/contrib/dev/acpica/CHANGES.txt new file mode 100644 index 0000000..66313c2 --- /dev/null +++ b/sys/contrib/dev/acpica/CHANGES.txt @@ -0,0 +1,2828 @@ +---------------------------------------- +15 August 2002. Summary of changes for this release. + +1) ACPI CA Core Subsystem Version 20020815: + +Fixed a reported problem where a Store to a method argument +that contains a reference did not perform the indirect store +correctly. This problem was created during the conversion +to the new reference object model – the indirect store to a +method argument code was not updated to reflect the new +model. + +Reworked the ACPI mode change code to better conform to ACPI +2.0, handle corner cases, and improve code legibility (Kochi +Takayoshi) + +Fixed a problem with the pathname parsing for the carat (^) +prefix. The heavy use of the carat operator by the new +namepath optimization in the iASL compiler uncovered a +problem with the AML interpreter handling of this prefix. +In the case where one or more carats precede a single +nameseg, the nameseg was treated as standalone and the +search rule (to root) was inadvertently applied. This could +cause both the iASL compiler and the interpreter to find the +wrong object or to miss the error that should occur if the +object does not exist at that exact pathname. + +Found and fixed the problem where the HP Pavilion DSDT would +not load. This was a relatively minor tweak to the table +loading code (a problem caused by the unexpected encounter +with a method invocation not within a control method), but +it does not solve the overall issue of the execution of AML +code at the table level. This investigation is still +ongoing. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K +Total + Debug Version: 149.4K Code, 61.6K Data, 211.0K +Total + Current Release: + Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K +Total + Debug Version: 150.0K Code, 61.7K Data, 211.7K +Total + + +2) Linux + +Remove redundant slab.h include (Brad Hards) + +Fix several bugs in thermal.c (Herbert Nachtnebel) + +Make CONFIG_ACPI_BOOT work properly (Pavel Machek) + +Change acpi_system_suspend to use updated irq functions +(Pavel Machek) + +Export acpi_get_firmware_table (Matthew Wilcox) + +Use proper root proc entry for ACPI (Kochi Takayoshi) + +Fix early-boot table parsing (Bjorn Helgaas) + + +3) iASL Compiler/Disassembler + +Reworked the compiler options to make them more consistent +and to use two-letter options where appropriate. We were +running out of sensible letters. This may break some +makefiles, so check the current options list by invoking the +compiler with no parameters. + +Completed the design and implementation of the ASL namepath +optimization option for the compiler. This option optimizes +all references to named objects to the shortest possible +path. The first attempt tries to utilize a single nameseg +(4 characters) and the “search-to-root” algorithm used by +the interpreter. If that cannot be used (because either the +name is not in the search path or there is a conflict with +another object with the same name), the pathname is +optimized using the carat prefix (usually a shorter string +than specifying the entire path from the root.) + +Implemented support to obtain the DSDT from the Windows +registry (when the disassembly option is specified with no +input file). Added this code as the implementation for +AcpiOsTableOverride in the Windows OSL. Migrated the 16-bit +code (used in the AcpiDump utility) to scan memory for the +DSDT to the AcpiOsTableOverride function in the DOS OSL to +make the disassembler truly OS independent. + +Implemented a new option to disassemble and compile in one +step. When used without an input filename, this option will +grab the DSDT from the local machine, disassemble it, and +compile it in one step. + +Added a warning message for invalid escapes (a backslash +followed by any character other than the allowable escapes). +This catches the quoted string error “\_SB_” (which should +be “\\_SB_” ). Also, there are numerous instances in the +ACPI specification where this error occurs. + +Added a compiler option to disable all optimizations. This +is basically the “compatibility mode” because by using this +option, the AML code will come out exactly the same as other +ASL compilers. + +Added error messages for incorrectly ordered dependent +resource functions. This includes: missing EndDependentFn +macro at end of dependent resource list, nested dependent +function macros (both start and end), and missing +StartDependentFn macro. These are common errors that should +be caught at compile time. + +Implemented _OSI support for the disassembler and compiler. +_OSI must be included in the namespace for proper +disassembly (because the disassembler must know the number +of arguments.) + +Added an “optimization” message type that is optional (off +by default). This message is used for all optimizations – +including constant folding, integer optimization, and +namepath optimization. + +---------------------------------------- +25 July 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020725: + +The AML Disassembler has been enhanced to produce compilable +ASL code and has been integrated into the iASL compiler (see +below) as well as the single-step disassembly for the AML +debugger and the disassembler for the AcpiDump utility. All +ACPI 2.0A opcodes, resource templates and macros are fully +supported. The disassembler has been tested on over 30 +different AML files, producing identical AML when the +resulting disassembled ASL file is recompiled with the same +ASL compiler. + +Modified the Resource Manager to allow zero interrupts and +zero dma channels during the GetCurrentResources call. This +was causing problems on some platforms. + +Added the AcpiOsRedirectOutput interface to the OSL to +simplify output redirection for the AcpiOsPrintf and +AcpiOsVprintf interfaces. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K +Total + Debug Version: 142.9K Code, 58.7K Data, 201.6K +Total + Current Release: + Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K +Total + Debug Version: 149.4K Code, 61.6K Data, 211.0K +Total + + +2) Linux + +Fixed a panic in the EC driver (Dominik Brodowski) + +Implemented checksum of the R/XSDT itself during Linux table +scan (Richard Schaal) + + +3) iASL compiler + +The AML disassembler is integrated into the compiler. The "- +d" option invokes the disassembler to completely +disassemble an input AML file, producing as output a text +ASL file with the extension ".dsl" (to avoid name collisions +with existing .asl source files.) A future enhancement will +allow the disassembler to obtain the BIOS DSDT from the +registry under Windows. + +Fixed a problem with the VendorShort and VendorLong resource +descriptors where an invalid AML sequence was created. + +Implemented a fix for BufferData term in the ASL parser. It +was inadvertently defined twice, allowing invalid syntax to +pass and causing reduction conflicts. + +Fixed a problem where the Ones opcode could get converted to +a value of zero if "Ones" was used where a byte, word or +dword value was expected. The 64-bit value is now truncated +to the correct size with the correct value. + + +---------------------------------------- +02 July 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020702: + +The Table Manager code has been restructured to add several +new features. Tables that are not required by the core +subsystem (other than the FADT, DSDT, FACS, PSDTs, etc.) are +no longer validated in any way and are returned from +AcpiGetFirmwareTable if requested. The AcpiOsTableOverride +interface is now called for each table that is loaded by the +subsystem in order to allow the host to override any table +it chooses. Previously, only the DSDT could be overridden. +Added one new files, tbrsdt.c and tbgetall.c. + +Fixed a problem with the conversion of internal package +objects to external objects (when a package is returned from +a control method.) The return buffer length was set to zero +instead of the proper length of the package object. + +Fixed a reported problem with the use of the RefOf and +DeRefOf operators when passing reference arguments to +control methods. A new type of Reference object is used +internally for references produced by the RefOf operator. + +Added additional error messages in the Resource Manager to +explain AE_BAD_DATA errors when they occur during resource +parsing. + +Split the AcpiEnableSubsystem into two primitives to enable +a finer granularity initialization sequence. These two +calls should be called in this order: AcpiEnableSubsystem +(flags), AcpiInitializeObjects (flags). The flags parameter +remains the same. + + +2) Linux + +Updated the ACPI utilities module to understand the new +style of fully resolved package objects that are now +returned from the core subsystem. This eliminates errors of +the form: + + ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT] + acpi_utils-0430 [145] acpi_evaluate_reference: + Invalid element in package (not a device reference) + +The method evaluation utility uses the new buffer allocation +scheme instead of calling AcpiEvaluate Object twice. + +Added support for ECDT. This allows the use of the Embedded +Controller before the namespace has been fully initialized, +which is necessary for ACPI 2.0 support, and for some +laptops to initialize properly. (Laptops using ECDT are +still rare, so only limited testing was performed of the +added functionality.) + +Fixed memory leaks in the EC driver. + +Eliminated a brittle code structure in acpi_bus_init(). + +Eliminated the acpi_evaluate() helper function in utils.c. +It is no longer needed since acpi_evaluate_object can +optionally allocate memory for the return object. + +Implemented fix for keyboard hang when getting battery +readings on some systems (Stephen White) + +PCI IRQ routing update (Dominik Brodowski) + +Fix an ifdef to allow compilation on UP with LAPIC but no +IOAPIC support + +---------------------------------------- +11 June 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020611: + +Fixed a reported problem where constants such as Zero and +One appearing within _PRT packages were not handled +correctly within the resource manager code. Originally +reported against the ASL compiler because the code generator +now optimizes integers to their minimal AML representation +(i.e. AML constants if possible.) The _PRT code now handles +all AML constant opcodes correctly (Zero, One, Ones, +Revision). + +Fixed a problem with the Concatenate operator in the AML +interpreter where a buffer result object was incorrectly +marked as not fully evaluated, causing a run-time error of +AE_AML_INTERNAL. + +All package sub-objects are now fully resolved before they +are returned from the external ACPI interfaces. This means +that name strings are resolved to object handles, and +constant operators (Zero, One, Ones, Revision) are resolved +to Integers. + +Implemented immediate resolution of the AML Constant opcodes +(Zero, One, Ones, Revision) to Integer objects upon +detection within the AML stream. This has simplified and +reduced the generated code size of the subsystem by +eliminating about 10 switch statements for these constants +(which previously were contained in Reference objects.) The +complicating issues are that the Zero opcode is used as a +"placeholder" for unspecified optional target operands and +stores to constants are defined to be no-ops. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K +Total + Debug Version: 143.8K Code, 58.8K Data, 202.6K +Total + Current Release: + Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K +Total + Debug Version: 142.9K Code, 58.7K Data, 201.6K +Total + + +2) Linux + +Added preliminary support for obtaining _TRA data for PCI +root bridges (Bjorn Helgaas). + + +3) iASL Compiler Version X2046: + +Fixed a problem where the "_DDN" reserved name was defined +to be a control method with one argument. There are no +arguments, and _DDN does not have to be a control method. + +Fixed a problem with the Linux version of the compiler where +the source lines printed with error messages were the wrong +lines. This turned out to be the "LF versus CR/LF" +difference between Windows and Unix. This appears to be the +longstanding issue concerning listing output and error +messages. + +Fixed a problem with the Linux version of compiler where +opcode names within error messages were wrong. This was +caused by a slight difference in the output of the Flex tool +on Linux versus Windows. + +Fixed a problem with the Linux compiler where the hex output +files contained some garbage data caused by an internal +buffer overrun. + + +---------------------------------------- +17 May 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020517: + +Implemented a workaround to an BIOS bug discovered on the HP +OmniBook where the FADT revision number and the table size +are inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table +size). The new behavior is to fallback to using only the +ACPI 1.0 fields of the FADT if the table is too small to be +a ACPI 2.0 table as claimed by the revision number. +Although this is a BIOS bug, this is a case where the +workaround is simple enough and with no side effects, so it +seemed prudent to add it. A warning message is issued, +however. + +Implemented minimum size checks for the fixed-length ACPI +tables -- the FADT and FACS, as well as consistency checks +between the revision number and the table size. + +Fixed a reported problem in the table override support where +the new table pointer was incorrectly treated as a physical +address instead of a logical address. + +Eliminated the use of the AE_AML_ERROR exception and +replaced it with more descriptive codes. + +Fixed a problem where an exception would occur if an ASL +Field was defined with no named Field Units underneath it +(used by some index fields). + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K +Total + Debug Version: 142.9K Code, 58.4K Data, 201.3K +Total + Current Release: + Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K +Total + Debug Version: 143.8K Code, 58.8K Data, 202.6K +Total + + + +2) Linux + +Much work done on ACPI init (MADT and PCI IRQ routing +support). (Paul D. and Dominik Brodowski) + +Fix PCI IRQ-related panic on boot (Sam Revitch) + +Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno) + +Fix "MHz" typo (Dominik Brodowski) + +Fix RTC year 2000 issue (Dominik Brodowski) + +Preclude multiple button proc entries (Eric Brunet) + +Moved arch-specific code out of include/platform/aclinux.h + +3) iASL Compiler Version X2044: + +Implemented error checking for the string used in the EISAID +macro (Usually used in the definition of the _HID object.) +The code now strictly enforces the PnP format - exactly 7 +characters, 3 uppercase letters and 4 hex digits. + +If a raw string is used in the definition of the _HID object +(instead of the EISAID macro), the string must contain all +alphanumeric characters (e.g., "*PNP0011" is not allowed +because of the asterisk.) + +Implemented checking for invalid use of ACPI reserved names +for most of the name creation operators (Name, Device, +Event, Mutex, OperationRegion, PowerResource, Processor, and +ThermalZone.) Previously, this check was only performed for +control methods. + +Implemented an additional check on the Name operator to emit +an error if a reserved name that must be implemented in ASL +as a control method is used. We know that a reserved name +must be a method if it is defined with input arguments. + +The warning emitted when a namespace object reference is not +found during the cross reference phase has been changed into +an error. The "External" directive should be used for names +defined in other modules. + + +4) Tools and Utilities + +The 16-bit tools (adump16 and aexec16) have been regenerated +and tested. + +Fixed a problem with the output of both acpidump and adump16 +where the indentation of closing parentheses and brackets +was not aligned properly with the parent block. + + +---------------------------------------- +03 May 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020503: + +Added support a new OSL interface that allows the host +operating system software to override the DSDT found in the +firmware - AcpiOsTableOverride. With this interface, the +OSL can examine the version of the firmware DSDT and replace +it with a different one if desired. + +Added new external interfaces for accessing ACPI registers +from device drivers and other system software - +AcpiGetRegister and AcpiSetRegister. This was simply an +externalization of the existing AcpiHwBitRegister +interfaces. + +Fixed a regression introduced in the previous build where +the ASL/AML CreateField operator always returned an error, +"destination must be a NS Node". + +Extended the maximum time (before failure) to successfully +enable ACPI mode to 3 seconds. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K +Total + Debug Version: 142.4K Code, 58.3K Data, 200.7K +Total + Current Release: + Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K +Total + Debug Version: 142.9K Code, 58.4K Data, 201.3K +Total + + +2) Linux + +Enhanced ACPI init code for SMP. We are now fully MPS and +$PIR-free. While 3 out of 4 of our in-house systems work +fine, the last one still hangs when testing the LAPIC timer. + +Renamed many files in 2.5 kernel release to omit "acpi_" +from the name. + +Added warning on boot for Presario 711FR. + +Sleep improvements (Pavel Machek) + +ACPI can now be built without CONFIG_PCI enabled. + +IA64: Fixed memory map functions (JI Lee) + + +3) iASL Compiler Version X2043: + +Added support to allow the compiler to be integrated into +the MS VC++ development environment for one-button +compilation of single files or entire projects -- with error- +to-source-line mapping. + +Implemented support for compile-time constant folding for +the Type3, Type4, and Type5 opcodes first defined in the +ACPI 2.0 specification. This allows the ASL writer to use +expressions instead of Integer/Buffer/String constants in +terms that must evaluate to constants at compile time and +will also simplify the emitted AML in any such sub- +expressions that can be folded (evaluated at compile-time.) +This increases the size of the compiler significantly +because a portion of the ACPI CA AML interpreter is included +within the compiler in order to pre-evaluate constant +expressions. + +Fixed a problem with the "Unicode" ASL macro that caused the +compiler to fault. (This macro is used in conjunction with +the _STR reserved name.) + +Implemented an AML opcode optimization to use the Zero, One, +and Ones opcodes where possible to further reduce the size +of integer constants and thus reduce the overall size of the +generated AML code. + +Implemented error checking for new reserved terms for ACPI +version 2.0A. + +Implemented the -qr option to display the current list of +ACPI reserved names known to the compiler. + +Implemented the -qc option to display the current list of +ASL operators that are allowed within constant expressions +and can therefore be folded at compile time if the operands +are constants. + + +4) Documentation + +Updated the Programmer's Reference for new interfaces, data +types, and memory allocation model options. + +Updated the iASL Compiler User Reference to apply new format +and add information about new features and options. + +---------------------------------------- +19 April 2002. Summary of changes for this release. + +1) ACPI CA Core Subsystem Version 20020419: + +The source code base for the Core Subsystem has been +completely cleaned with PC-lint (FlexLint) for both 32-bit +and 64-bit versions. The Lint option files used are +included in the /acpi/generate/lint directory. + +Implemented enhanced status/error checking across the entire +Hardware manager subsystem. Any hardware errors (reported +from the OSL) are now bubbled up and will abort a running +control method. + +Fixed a problem where the per-ACPI-table integer width (32 +or 64) was stored only with control method nodes, causing a +fault when non-control method code was executed during table +loading. The solution implemented uses a global variable to +indicate table width across the entire ACPI subsystem. +Therefore, ACPI CA does not support mixed integer widths +across different ACPI tables (DSDT, SSDT). + +Fixed a problem where NULL extended fields (X fields) in an +ACPI 2.0 ACPI FADT caused the table load to fail. Although +the existing ACPI specification is a bit fuzzy on this +topic, the new behavior is to fall back on a ACPI 1.0 field +if the corresponding ACPI 2.0 X field is zero (even though +the table revision indicates a full ACPI 2.0 table.) The +ACPI specification will be updated to clarify this issue. + +Fixed a problem with the SystemMemory operation region +handler where memory was always accessed byte-wise even if +the AML-specified access width was larger than a byte. This +caused problems on systems with memory-mapped I/O. Memory +is now accessed with the width specified. On systems that +do not support non-aligned transfers, a check is made to +guarantee proper address alignment before proceeding in +order to avoid an AML-caused alignment fault within the +kernel. + +Fixed a problem with the ExtendedIrq resource where only one +byte of the 4-byte Irq field was extracted. + +Fixed the AcpiExDigitsNeeded() procedure to support _UID. +This function was out of date and required a rewrite. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K +Total + Debug Version: 139.8K Code, 57.4K Data, 197.2K +Total + Current Release: + Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K +Total + Debug Version: 142.4K Code, 58.3K Data, 200.7K +Total + + +2) Linux + +PCI IRQ routing fixes (Dominik Brodowski) + + +3) iASL Compiler Version X2042: + +Implemented an additional compile-time error check for a +field unit whose size + minimum access width would cause a +run-time access beyond the end-of-region. Previously, only +the field size itself was checked. + +The Core subsystem and iASL compiler now share a common +parse object in preparation for compile-time evaluation of +the type 3/4/5 ASL operators. + + +---------------------------------------- +Summary of changes for this release: 03_29_02 + +1) ACPI CA Core Subsystem Version 20020329: + +Implemented support for late evaluation of TermArg operands +to Buffer and Package objects. This allows complex +expressions to be used in the declarations of these object +types. + +Fixed an ACPI 1.0 compatibility issue when reading Fields. +In ACPI 1.0, if the field was larger than 32 bits, it was +returned as a buffer – otherwise it was returned as an +integer. In ACPI 2.0, the field is returned as a buffer +only if the field is larger than 64 bits. The TableRevision +is now considered when making this conversion to avoid +incompatibility with existing ASL code. + +Implemented logical addressing for AcpiOsGetRootPointer. +This allows an RSDP with either a logical or physical +address. With this support, the host OS can now override +all ACPI tables with one logical RSDP. Includes +implementation of “typed” pointer support to allow a common +data type for both physical and logical pointers internally. +This required a change to the AcpiOsGetRootPointer +interface. + +Implemented the use of ACPI 2.0 Generic Address Structures +for all GPE, Fixed Event, and PM Timer I/O. This allows the +use of memory mapped I/O for these ACPI features. + +Initialization now ignores not only non-required tables (All +tables other than the FADT, FACS, DSDT, and SSDTs), but also +does not validate the table headers of unrecognized tables. + +Fixed a problem where a notify handler could only be +installed/removed on an object of type Device. All "notify" +objects are now supported -- Devices, Processor, Power, and +Thermal. + +Removed most verbosity from the ACPI_DB_INFO debug level. +Only critical information is returned when this debug level +is enabled. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release + Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K +Total + Debug Version: 138.0K Code, 56.6K Data, 194.6K +Total + Current Release: + Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K +Total + Debug Version: 139.8K Code, 57.4K Data, 197.2K +Total + + +2) Linux: + +The processor driver (acpi_processor.c) now fully supports +ACPI 2.0-based processor performance control (e.g. Intel(R) +SpeedStep(TM) technology) Note that older laptops that only +have the Intel "applet" interface are not supported through +this. The 'limit' and 'performance' interface (/proc) are +fully functional. [Note that basic policy for controlling +performance state transitions will be included in the next +version of ospmd.] The idle handler was modified to more +aggressively use C2, and PIIX4 errata handling underwent a +complete overhaul (big thanks to Dominik Brodowski). + +Added support for ACPI-PCI device binding (acpi_pci_root.c). +_ADR-based devices in the ACPI namespace are now dynamically +bound (associated) with their PCI counterparts (e.g. PCI1- +>01:00.0). This allows, among other things, ACPI to resolve +bus numbers for subordinate PCI bridges. + +Enhanced PCI IRQ routing to get the proper bus number for +_PRT entries defined underneath PCI bridges. + +Added IBM 600E to bad bios list due to invalid _ADR value +for PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ +routing. + +In the process of adding full MADT support (e.g. IOAPIC) for +IA32 (acpi.c, mpparse.c) -- stay tuned. + +Added back visual differentiation between fixed-feature and +control-method buttons in dmesg. Buttons are also subtyped +(e.g. button/power/PWRF) to simplify button identification. + +We no longer use -Wno-unused when compiling debug. Please +ignore any "_THIS_MODULE defined but not used" messages. + +Can now shut down the system using "magic sysrq" key. + + +3) iASL Compiler version 2041: + +Fixed a problem where conversion errors for +hex/octal/decimal constants were not reported. + +Implemented a fix for the General Register template Address +field. This field was 8 bits when it should be 64. + +Fixed a problem where errors/warnings were no longer being +emitted within the listing output file. + +Implemented the ACPI 2.0A restriction on ACPI Table +Signatures to exactly 4 characters, alphanumeric only. + + + + +---------------------------------------- +Summary of changes for this release: 03_08_02 + + +1) ACPI CA Core Subsystem Version 20020308: + +Fixed a problem with AML Fields where the use of the +"AccessAny" keyword could cause an interpreter error due to +attempting to read or write beyond the end of the parent +Operation Region. + +Fixed a problem in the SystemMemory Operation Region handler +where an attempt was made to map memory beyond the end of +the region. This was the root cause of the "AE_ERROR" and +"AE_NO_MEMORY" errors on some Linux systems. + +Fixed a problem where the interpreter/namespace "search to +root" algorithm was not functioning for some object types. +Relaxed the internal restriction on the search to allow +upsearches for all external object types as well as most +internal types. + + +2) Linux: + +We now use safe_halt() macro versus individual calls to sti +| hlt. + +Writing to the processor limit interface should now work. +"echo 1" will increase the limit, 2 will decrease, and 0 +will reset to the default. + + +3) ASL compiler: + +Fixed segfault on Linux version. + + +---------------------------------------- +Summary of changes for this release: 02_25_02 + +1) ACPI CA Core Subsystem: + + +Fixed a problem where the GPE bit masks were not initialized +properly, causing erratic GPE behavior. + +Implemented limited support for multiple calling +conventions. The code can be generated with either the VPL +(variable parameter list, or "C") convention, or the FPL +(fixed parameter list, or "Pascal") convention. The core +subsystem is about 3.4% smaller when generated with FPL. + + +2) Linux + +Re-add some /proc/acpi/event functionality that was lost +during the rewrite + +Resolved issue with /proc events for fixed-feature buttons +showing up as the system device. + +Fixed checks on C2/C3 latencies to be inclusive of maximum +values. + +Replaced AE_ERRORs in acpi_osl.c with more specific error +codes. + +Changed ACPI PRT option from "pci=noacpi-routing" to +"pci=noacpi" + +Fixed limit interface & usage to fix bugs with passive +cooling hysterisis. + +Restructured PRT support. + + +---------------------------------------- +Summary of changes for this label: 02_14_02 + + +1) ACPI CA Core Subsystem: + +Implemented support in AcpiLoadTable to allow loading of +FACS and FADT tables. + +Suport for the now-obsolete interim 0.71 64-bit ACPI tables +has been removed. All 64-bit platforms should be migrated +to the ACPI 2.0 tables. The actbl71.h header has been +removed from the source tree. + +All C macros defined within the subsystem have been prefixed +with "ACPI_" to avoid collision with other system include +files. + +Removed the return value for the two AcpiOsPrint interfaces, +since it is never used and causes lint warnings for ignoring +the return value. + +Added error checking to all internal mutex acquire and +release calls. Although a failure from one of these +interfaces is probably a fatal system error, these checks +will cause the immediate abort of the currently executing +method or interface. + +Fixed a problem where the AcpiSetCurrentResources interface +could fault. This was a side effect of the deployment of +the new memory allocation model. + +Fixed a couple of problems with the Global Lock support +introduced in the last major build. The "common" (1.0/2.0) +internal FACS was being overwritten with the FACS signature +and clobbering the Global Lock pointer. Also, the actual +firmware FACS was being unmapped after construction of the +"common" FACS, preventing access to the actual Global Lock +field within it. The "common" internal FACS is no longer +installed as an actual ACPI table; it is used simply as a +global. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release (02_07_01) + Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K +Total + Debug Version: 136.9K Code, 56.4K Data, 193.3K +Total + Current Release: + Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K +Total + Debug Version: 138.0K Code, 56.6K Data, 194.6K +Total + + +2) Linux + +Updated Linux-specific code for core macro and OSL interface +changes described above. + +Improved /proc/acpi/event. It now can be opened only once +and has proper poll functionality. + +Fixed and restructured power management (acpi_bus). + +Only create /proc "view by type" when devices of that class +exist. + +Fixed "charging/discharging" bug (and others) in +acpi_battery. + +Improved thermal zone code. + + +3) ASL Compiler, version X2039: + +Implemented the new compiler restriction on ASL String +hex/octal escapes to non-null, ASCII values. An error +results if an invalid value is used. (This will require an +ACPI 2.0 specification change.) + +AML object labels that are output to the optional C and ASM +source are now prefixed with both the ACPI table signature +and table ID to help guarantee uniqueness within a large +BIOS project. + + +---------------------------------------- +Summary of changes for this label: 02_01_02 + +1) ACPI CA Core Subsystem: + +ACPI 2.0 support is complete in the entire Core Subsystem +and the ASL compiler. All new ACPI 2.0 operators are +implemented and all other changes for ACPI 2.0 support are +complete. With simultaneous code and data optimizations +throughout the subsystem, ACPI 2.0 support has been +implemented with almost no additional cost in terms of code +and data size. + +Implemented a new mechanism for allocation of return +buffers. If the buffer length is set to +ACPI_ALLOCATE_BUFFER, the buffer will be allocated on behalf +of the caller. Consolidated all return buffer validation +and allocation to a common procedure. Return buffers will +be allocated via the primary OSL allocation interface since +it appears that a separate pool is not needed by most users. +If a separate pool is required for these buffers, the caller +can still use the original mechanism and pre-allocate the +buffer(s). + +Implemented support for string operands within the DerefOf +operator. + +Restructured the Hardware and Event managers to be table +driven, simplifying the source code and reducing the amount +of generated code. + +Split the common read/write low-level ACPI register bitfield +procedure into a separate read and write, simplifying the +code considerably. + +Obsoleted the AcpiOsCallocate OSL interface. This interface +was used only a handful of times and didn't have enough +critical mass for a separate interface. Replaced with a +common calloc procedure in the core. + +Fixed a reported problem with the GPE number mapping +mechanism that allows GPE1 numbers to be non-contiguous with +GPE0. Reorganized the GPE information and shrunk a large +array that was originally large enough to hold info for all +possible GPEs (256) to simply large enough to hold all GPEs +up to the largest GPE number on the machine. + +Fixed a reported problem with resource structure alignment +on 64-bit platforms. + +Changed the AcpiEnableEvent and AcpiDisableEvent external +interfaces to not require any flags for the common case of +enabling/disabling a GPE. + +Implemented support to allow a "Notify" on a Processor +object. + +Most TBDs in comments within the source code have been +resolved and eliminated. + +Fixed a problem in the interpreter where a standalone parent +prefix (^) was not handled correctly in the interpreter and +debugger. + +Removed obsolete and unnecessary GPE save/restore code. + +Implemented Field support in the ASL Load operator. This +allows a table to be loaded from a named field, in addition +to loading a table directly from an Operation Region. + +Implemented timeout and handle support in the external +Global Lock interfaces. + +Fixed a problem in the AcpiDump utility where pathnames were +no longer being generated correctly during the dump of named +objects. + +Modified the AML debugger to give a full display of if/while +predicates instead of just one AML opcode at a time. (The +predicate can have several nested ASL statements.) The old +method was confusing during single stepping. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release (12_18_01) + Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K +Total + Debug Version: 138.3K Code, 55.9K Data, 194.2K +Total + Current Release: + Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K +Total + Debug Version: 136.9K Code, 56.4K Data, 193.3K +Total + +2) Linux + + Implemented fix for PIIX reverse throttling errata +(Processor driver) + +Added new Limit interface (Processor and Thermal drivers) + +New thermal policy (Thermal driver) + +Many updates to /proc + +Battery "low" event support (Battery driver) + +Supports ACPI PCI IRQ routing (PCI Link and PCI root +drivers) + +IA32 - IA64 initialization unification, no longer +experimental + +Menuconfig options redesigned + +3) ASL Compiler, version X2037: + +Implemented several new output features to simplify +integration of AML code into firmware: 1) Output the AML in +C source code with labels for each named ASL object. The +original ASL source code is interleaved as C comments. 2) +Output the AML in ASM source code with labels and +interleaved ASL source. 3) Output the AML in raw hex +table form, in either C or ASM. + +Implemented support for optional string parameters to the +LoadTable operator. + +Completed support for embedded escape sequences within +string literals. The compiler now supports all single +character escapes as well as the Octal and Hex escapes. +Note: the insertion of a null byte into a string literal +(via the hex/octal escape) causes the string to be +immediately terminated. A warning is issued. + +Fixed a problem where incorrect AML was generated for the +case where an ASL namepath consists of a single parent +prefix ( + +) with no trailing name segments. + +The compiler has been successfully generated with a 64-bit C +compiler. + + + + +---------------------------------------- +Summary of changes for this label: 12_18_01 + +1) Linux + +Enhanced blacklist with reason and severity fields. Any +table's signature may now be used to identify a blacklisted +system. + +Call _PIC control method to inform the firmware which +interrupt model the OS is using. Turn on any disabled link +devices. + +Cleaned up busmgr /proc error handling (Andreas Dilger) + + 2) ACPI CA Core Subsystem: + +Implemented ACPI 2.0 semantics for the "Break" operator +(Exit from while loop) + +Completed implementation of the ACPI 2.0 "Continue", +"ConcatenateResTemplate", "DataTableRegion", and "LoadTable" +operators. All new ACPI 2.0 operators are now implemented +in both the ASL compiler and the AML interpreter. The only +remaining ACPI 2.0 task is support for the String data type +in the DerefOf operator. Fixed a problem with AcquireMutex +where the status code was lost if the caller had to actually +wait for the mutex. + +Increased the maximum ASL Field size from 64K bits to 4G +bits. + +Completed implementation of the external Global Lock +interfaces -- AcpiAcquireGlobalLock and +AcpiReleaseGlobalLock. The Timeout and Handler parameters +were added. + +Completed another pass at removing warnings and issues when +compiling with 64-bit compilers. The code now compiles +cleanly with the Intel 64-bit C/C++ compiler. Most notably, +the pointer add and subtract (diff) macros have changed +considerably. + +Created and deployed a new ACPI_SIZE type that is 64-bits +wide on 64-bit platforms, 32-bits on all others. This type +is used wherever memory allocation and/or the C sizeof() +operator is used, and affects the OSL memory allocation +interfaces AcpiOsAllocate and AcpiOsCallocate. + +Implemented sticky user breakpoints in the AML debugger. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release (12_05_01) + Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K +Total + Debug Version: 136.2K Code, 55.6K Data, 191.8K +Total + Current Release: + Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K +Total + Debug Version: 138.3K Code, 55.9K Data, 194.2K +Total + + 3) ASL Compiler, version X2034: + +Now checks for (and generates an error if detected) the use +of a Break or Continue statement without an enclosing While +statement. + +Successfully generated the compiler with the Intel 64-bit C +compiler. + + ---------------------------------------- +Summary of changes for this label: 12_05_01 + + 1) ACPI CA Core Subsystem: + +The ACPI 2.0 CopyObject operator is fully implemented. This +operator creates a new copy of an object (and is also used +to bypass the "implicit conversion" mechanism of the Store +operator.) + +The ACPI 2.0 semantics for the SizeOf operator are fully +implemented. The change is that performing a SizeOf on a +reference object causes an automatic dereference of the +object to tha actual value before the size is evaluated. +This behavior was undefined in ACPI 1.0. + +The ACPI 2.0 semantics for the Extended IRQ resource +descriptor have been implemented. The interrupt polarity +and mode are now independently set. + +Fixed a problem where ASL Constants (Zero, One, Ones, +Revision) appearing in Package objects were not properly +converted to integers when the internal Package was +converted to an external object (via the AcpiEvaluateObject +interface.) + +Fixed a problem with the namespace object deletion mechanism +for objects created by control methods. There were two +parts to this problem: 1) Objects created during the +initialization phase method parse were not being deleted, +and 2) The object owner ID mechanism to track objects was +broken. + +Fixed a problem where the use of the ASL Scope operator +within a control method would result in an invalid opcode +exception. + +Fixed a problem introduced in the previous label where the +buffer length required for the _PRT structure was not being +returned correctly. + +Code and Data Size: Current core subsystem library sizes are +shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release (11_20_01) + Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K +Total + Debug Version: 135.1K Code, 55.4K Data, 190.5K +Total + + Current Release: + Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K +Total + Debug Version: 136.2K Code, 55.6K Data, 191.8K +Total + + 2) Linux: + +Updated all files to apply cleanly against 2.4.16. + +Added basic PCI Interrupt Routing Table (PRT) support for +IA32 (acpi_pci.c), and unified the PRT code for IA32 and +IA64. This version supports both static and dyanmic PRT +entries, but dynamic entries are treated as if they were +static (not yet reconfigurable). Architecture- specific +code to use this data is absent on IA32 but should be +available shortly. + +Changed the initialization sequence to start the ACPI +interpreter (acpi_init) prior to initialization of the PCI +driver (pci_init) in init/main.c. This ordering is required +to support PRT and facilitate other (future) enhancement. A +side effect is that the ACPI bus driver and certain device +drivers can no longer be loaded as modules. + +Modified the 'make menuconfig' options to allow PCI +Interrupt Routing support to be included without the ACPI +Bus and other device drivers. + + 3) ASL Compiler, version X2033: + +Fixed some issues with the use of the new CopyObject and +DataTableRegion operators. Both are fully functional. + + ---------------------------------------- +Summary of changes for this label: 11_20_01 + + 20 November 2001. Summary of changes for this release. + + 1) ACPI CA Core Subsystem: + +Updated Index support to match ACPI 2.0 semantics. Storing +a Integer, String, or Buffer to an Index of a Buffer will +store only the least-significant byte of the source to the +Indexed buffer byte. Multiple writes are not performed. + +Fixed a problem where the access type used in an AccessAs +ASL operator was not recorded correctly into the field +object. + +Fixed a problem where ASL Event objects were created in a +signalled state. Events are now created in an unsignalled +state. + +The internal object cache is now purged after table loading +and initialization to reduce the use of dynamic kernel +memory -- on the assumption that object use is greatest +during the parse phase of the entire table (versus the run- +time use of individual control methods.) + +ACPI 2.0 variable-length packages are now fully operational. + +Code and Data Size: Code and Data optimizations have +permitted new feature development with an actual reduction +in the library size. Current core subsystem library sizes +are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release (11_09_01): + Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K +Total + Debug Version: 134.5K Code, 55.4K Data, 189.9K +Total + + Current Release: + Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K +Total + Debug Version: 135.1K Code, 55.4K Data, 190.5K +Total + + 2) Linux: + +Enhanced the ACPI boot-time initialization code to allow the +use of Local APIC tables for processor enumeration on IA-32, +and to pave the way for a fully MPS-free boot (on SMP +systems) in the near future. This functionality replaces +arch/i386/kernel/acpitables.c, which was introduced in an +earlier 2.4.15-preX release. To enable this feature you +must add "acpi_boot=on" to the kernel command line -- see +the help entry for CONFIG_ACPI_BOOT for more information. +An IA-64 release is in the works... + +Restructured the configuration options to allow boot-time +table parsing support without inclusion of the ACPI +Interpreter (and other) code. + +NOTE: This release does not include fixes for the reported +events, power-down, and thermal passive cooling issues +(coming soon). + + 3) ASL Compiler: + +Added additional typechecking for Fields within restricted +access Operation Regions. All fields within EC and CMOS +regions must be declared with ByteAcc. All fields withing +SMBus regions must be declared with the BufferAcc access +type. + +Fixed a problem where the listing file output of control +methods no longer interleaved the actual AML code with the +ASL source code. + + + +---------------------------------------- +Summary of changes for this label: 11_09_01 + +1) ACPI CA Core Subsystem: + +Implemented ACPI 2.0-defined support for writes to fields +with a Buffer, String, or Integer source operand that is +smaller than the target field. In these cases, the source +operand is zero-extended to fill the target field. + +Fixed a problem where a Field starting bit offset (within +the parent operation region) was calculated incorrectly if +the alignment of the field differed from the access width. +This affected CreateWordField, CreateDwordField, +CreateQwordField, and possibly other fields that use the +"AccessAny" keyword. + +Fixed a problem introduced in the 11_02_01 release where +indirect stores through method arguments did not operate +correctly. + +2) Linux: + +Implemented boot-time ACPI table parsing support +(CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This +code facilitates the use of ACPI tables (e.g. MADT, SRAT) +rather than legacy BIOS interfaces (e.g. MPS) for the +configuration of system processors, memory, and interrupts +during setup_arch(). Note that this patch does not include +the required architecture-specific changes required to apply +this information -- subsequent patches will be posted for +both IA32 and IA64 to achieve this. + +Added low-level sleep support for IA32 platforms, courtesy +of Pat Mochel. This allows IA32 systems to transition +to/from various sleeping states (e.g. S1, S3), although the +lack of a centralized driver model and power-manageable +drivers will prevent its (successful) use on most systems. + +Revamped the ACPI 'menuconfig' layout: created new "ACPI +Support" submenu, unified IA32 and IA64 options, added new +"Boot using ACPI tables" option, etc. + +Increased the default timeout for the EC driver from 1ms to +10ms (1000 cycles of 10us) to try to address AE_TIME errors +during EC transactions. + + ---------------------------------------- +Summary of changes for this label: 11_02_01 + +1) ACPI CA Core Subsystem: + +ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access +(QWordAcc keyword). All ACPI 2.0 64-bit support is now +implemented. + +OSL Interfaces: Several of the OSL (AcpiOs*) interfaces +required changes to support ACPI 2.0 Qword field access. +Read/Write PciConfiguration(), Read/Write Memory(), and +Read/Write Port() now accept an ACPI_INTEGER (64 bits) as +the value parameter. Also, the value parameter for the +address space handler interface is now an ACPI_INTEGER. OSL +implementations of these interfaces must now handle the case +where the Width parameter is 64. + +Index Fields: Fixed a problem where unaligned bit assembly +and disassembly for IndexFields was not supported correctly. + +Index and Bank Fields: Nested Index and Bank Fields are now +supported. During field access, a check is performed to +ensure that the value written to an Index or Bank register +is not out of the range of the register. The Index (or +Bank) register is written before each access to the field +data. Future support will include allowing individual +IndexFields to be wider than the DataRegister width. + +Fields: Fixed a problem where the AML interpreter was +incorrectly attempting to write beyond the end of a +Field/OpRegion. This was a boundary case that occurred when +a DWORD field was written to a BYTE access OpRegion, forcing +multiple writes and causing the interpreter to write one +datum too many. + +Fields: Fixed a problem with Field/OpRegion access where the +starting bit address of a field was incorrectly calculated +if the current access type was wider than a byte (WordAcc, +DwordAcc, or QwordAcc). + +Fields: Fixed a problem where forward references to +individual FieldUnits (individual Field names within a Field +definition) were not resolved during the AML table load. + +Fields: Fixed a problem where forward references from a +Field definition to the parent Operation Region definition +were not resolved during the AML table load. + +Fields: Duplicate FieldUnit names within a scope are now +detected during AML table load. + +Acpi Interfaces: Fixed a problem where the AcpiGetName() +interface returned an incorrect name for the root node. + +Code and Data Size: Code and Data optimizations have +permitted new feature development with an actual reduction +in the library size. Current core subsystem library sizes +are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler, and these values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Release (10_18_01): + Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K +Total + Debug Version: 136.7K Code, 57.4K Data, 194.2K +Total + + Current Release: + Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K +Total + Debug Version: 134.5K Code, 55.4K Data, 189.9K +Total + + 2) Linux: + +Improved /proc processor output (Pavel Machek) Re-added +MODULE_LICENSE("GPL") to all modules. + + 3) ASL Compiler version X2030: + +Duplicate FieldUnit names within a scope are now detected +and flagged as errors. + + 4) Documentation: + +Programmer Reference updated to reflect OSL and address +space handler interface changes described above. + +---------------------------------------- +Summary of changes for this label: 10_18_01 + +ACPI CA Core Subsystem: + +Fixed a problem with the internal object reference count +mechanism that occasionally caused premature object +deletion. This resolves all of the outstanding problem +reports where an object is deleted in the middle of an +interpreter evaluation. Although this problem only showed +up in rather obscure cases, the solution to the problem +involved an adjustment of all reference counts involving +objects attached to namespace nodes. + +Fixed a problem with Field support in the interpreter where +writing to an aligned field whose length is an exact +multiple (2 or greater) of the field access granularity +would cause an attempt to write beyond the end of the field. + +The top level AML opcode execution functions within the +interpreter have been renamed with a more meaningful and +consistent naming convention. The modules exmonad.c and +exdyadic.c were eliminated. New modules are exoparg1.c, +exoparg2.c, exoparg3.c, and exoparg6.c. + +Support for the ACPI 2.0 "Mid" ASL operator has been +implemented. + +Fixed a problem where the AML debugger was causing some +internal objects to not be deleted during subsystem +termination. + +Fixed a problem with the external AcpiEvaluateObject +interface where the subsystem would fault if the named +object to be evaluated refered to a constant such as Zero, +Ones, etc. + +Fixed a problem with IndexFields and BankFields where the +subsystem would fault if the index, data, or bank registers +were not defined in the same scope as the field itself. + +Added printf format string checking for compilers that +support this feature. Corrected more than 50 instances of +issues with format specifiers within invocations of +ACPI_DEBUG_PRINT throughout the core subsystem code. + +The ASL "Revision" operator now returns the ACPI support +level implemented in the core - the value "2" since the ACPI +2.0 support is more than 50% implemented. + +Enhanced the output of the AML debugger "dump namespace" +command to output in a more human-readable form. + +Current core subsystem library code sizes are shown below. +These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The +debug version of the code includes the full debug trace +mechanism -- leading to a much larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Previous Label (09_20_01): + Non-Debug Version: 65K Code, 5K Data, 70K +Total + Debug Version: 138K Code, 58K Data, 196K +Total + + This Label: + Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K +Total + Debug Version: 136.7K Code, 57.4K Data, 194.2K +Total + +Linux: + +Implemented a "Bad BIOS Blacklist" to track machines that +have known ASL/AML problems. + +Enhanced the /proc interface for the thermal zone driver and +added support for _HOT (the critical suspend trip point). +The 'info' file now includes threshold/policy information, +and allows setting of _SCP (cooling preference) and _TZP +(polling frequency) values to the 'info' file. Examples: +"echo tzp=5 > info" sets the polling frequency to 5 seconds, +and "echo scp=1 > info" sets the cooling preference to the +passive/quiet mode (if supported by the ASL). + +Implemented a workaround for a gcc bug that resuted in an +OOPs when loading the control method battery driver. + + ---------------------------------------- +Summary of changes for this label: 09_20_01 + + ACPI CA Core Subsystem: + +The AcpiEnableEvent and AcpiDisableEvent interfaces have +been modified to allow individual GPE levels to be flagged +as wake-enabled (i.e., these GPEs are to remain enabled when +the platform sleeps.) + +The AcpiEnterSleepState and AcpiLeaveSleepState interfaces +now support wake-enabled GPEs. This means that upon +entering the sleep state, all GPEs that are not wake-enabled +are disabled. When leaving the sleep state, these GPEs are +reenabled. + +A local double-precision divide/modulo module has been added +to enhance portability to OS kernels where a 64-bit math +library is not available. The new module is "utmath.c". + +Several optimizations have been made to reduce the use of +CPU stack. Originally over 2K, the maximum stack usage is +now below 2K at 1860 bytes (1.82k) + +Fixed a problem with the AcpiGetFirmwareTable interface +where the root table pointer was not mapped into a logical +address properly. + +Fixed a problem where a NULL pointer was being dereferenced +in the interpreter code for the ASL Notify operator. + +Fixed a problem where the use of the ASL Revision operator +returned an error. This operator now returns the current +version of the ACPI CA core subsystem. + +Fixed a problem where objects passed as control method +parameters to AcpiEvaluateObject were always deleted at +method termination. However, these objects may end up being +stored into the namespace by the called method. The object +reference count mechanism was applied to these objects +instead of a force delete. + +Fixed a problem where static strings or buffers (contained +in the AML code) that are declared as package elements +within the ASL code could cause a fault because the +interpreter would attempt to delete them. These objects are +now marked with the "static object" flag to prevent any +attempt to delete them. + +Implemented an interpreter optimization to use operands +directly from the state object instead of extracting the +operands to local variables. This reduces stack use and +code size, and improves performance. + +The module exxface.c was eliminated as it was an unnecessary +extra layer of code. + +Current core subsystem library code sizes are shown below. +These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The +debug version of the code includes the full debug trace +mechanism -- leading to a much larger code and data size. +Note that these values will vary depending on the efficiency +of the compiler and the compiler options used during +generation. + + Non-Debug Version: 65K Code, 5K Data, 70K Total +(Previously 69K) Debug Version: 138K Code, 58K Data, +196K Total (Previously 195K) + +Linux: + +Support for ACPI 2.0 64-bit integers has been added. All +ACPI Integer objects are now 64 bits wide + +All Acpi data types and structures are now in lower case. +Only Acpi macros are upper case for differentiation. + + Documentation: + +Changes to the external interfaces as described above. + + ---------------------------------------- +Summary of changes for this label: 08_31_01 + + ACPI CA Core Subsystem: + +A bug with interpreter implementation of the ASL Divide +operator was found and fixed. The implicit function return +value (not the explicit store operands) was returning the +remainder instead of the quotient. This was a longstanding +bug and it fixes several known outstanding issues on various +platforms. + +The ACPI_DEBUG_PRINT and function trace entry/exit macros +have been further optimized for size. There are 700 +invocations of the DEBUG_PRINT macro alone, so each +optimization reduces the size of the debug version of the +subsystem significantly. + +A stack trace mechanism has been implemented. The maximum +stack usage is about 2K on 32-bit platforms. The debugger +command "stat stack" will display the current maximum stack +usage. + +All public symbols and global variables within the subsystem +are now prefixed with the string "Acpi". This keeps all of +the symbols grouped together in a kernel map, and avoids +conflicts with other kernel subsystems. + +Most of the internal fixed lookup tables have been moved +into the code segment via the const operator. + +Several enhancements have been made to the interpreter to +both reduce the code size and improve performance. + +Current core subsystem library code sizes are shown below. +These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The +debug version of the code includes the full debug trace +mechanism which contains over 700 invocations of the +DEBUG_PRINT macro, 500 function entry macro invocations, and +over 900 function exit macro invocations -- leading to a +much larger code and data size. Note that these values will +vary depending on the efficiency of the compiler and the +compiler options used during generation. + + Non-Debug Version: 64K Code, 5K Data, 69K Total +Debug Version: 137K Code, 58K Data, 195K Total + + Linux: + +Implemented wbinvd() macro, pending a kernel-wide +definition. + +Fixed /proc/acpi/event to handle poll() and short reads. + + ASL Compiler, version X2026: + +Fixed a problem introduced in the previous label where the +AML code emitted for package objects produced packages with +zero length. + + ---------------------------------------- +Summary of changes for this label: 08_16_01 + +ACPI CA Core Subsystem: + +The following ACPI 2.0 ASL operators have been implemented +in the AML interpreter (These are already supported by the +Intel ASL compiler): ToDecimalString, ToHexString, +ToString, ToInteger, and ToBuffer. Support for 64-bit AML +constants is implemented in the AML parser, debugger, and +disassembler. + +The internal memory tracking mechanism (leak detection code) +has been upgraded to reduce the memory overhead (a separate +tracking block is no longer allocated for each memory +allocation), and now supports all of the internal object +caches. + +The data structures and code for the internal object caches +have been coelesced and optimized so that there is a single +cache and memory list data structure and a single group of +functions that implement generic cache management. This has +reduced the code size in both the debug and release versions +of the subsystem. + +The DEBUG_PRINT macro(s) have been optimized for size and +replaced by ACPI_DEBUG_PRINT. The syntax for this macro is +slightly different, because it generates a single call to an +internal function. This results in a savings of about 90 +bytes per invocation, resulting in an overall code and data +savings of about 16% in the debug version of the subsystem. + + Linux: + +Fixed C3 disk corruption problems and re-enabled C3 on +supporting machines. + +Integrated low-level sleep code by Patrick Mochel. + +Further tweaked source code Linuxization. + +Other minor fixes. + + ASL Compiler: + +Support for ACPI 2.0 variable length packages is +fixed/completed. + +Fixed a problem where the optional length parameter for the +ACPI 2.0 ToString operator. + +Fixed multiple extraneous error messages when a syntax error +is detected within the declaration line of a control method. + + ---------------------------------------- +Summary of changes for this label: 07_17_01 + +ACPI CA Core Subsystem: + +Added a new interface named AcpiGetFirmwareTable to obtain +any ACPI table via the ACPI signature. The interface can be +called at any time during kernel initialization, even before +the kernel virtual memory manager is initialized and paging +is enabled. This allows kernel subsystems to obtain ACPI +tables very early, even before the ACPI CA subsystem is +initialized. + +Fixed a problem where Fields defined with the AnyAcc +attribute could be resolved to the incorrect address under +the following conditions: 1) the field width is larger than +8 bits and 2) the parent operation region is not defined on +a DWORD boundary. + +Fixed a problem where the interpreter is not being locked +during namespace initialization (during execution of the +_INI control methods), causing an error when an attempt is +made to release it later. + +ACPI 2.0 support in the AML Interpreter has begun and will +be ongoing throughout the rest of this year. In this label, +The Mod operator is implemented. + +Added a new data type to contain full PCI addresses named +ACPI_PCI_ID. This structure contains the PCI Segment, Bus, +Device, and Function values. + + Linux: + +Enhanced the Linux version of the source code to change most +capitalized ACPI type names to lowercase. For example, all +instances of ACPI_STATUS are changed to acpi_status. This +will result in a large diff, but the change is strictly +cosmetic and aligns the CA code closer to the Linux coding +standard. + +OSL Interfaces: + +The interfaces to the PCI configuration space have been +changed to add the PCI Segment number and to split the +single 32-bit combined DeviceFunction field into two 16-bit +fields. This was accomplished by moving the four values +that define an address in PCI configuration space (segment, +bus, device, and function) to the new ACPI_PCI_ID structure. + +The changes to the PCI configuration space interfaces led to +a reexamination of the complete set of address space access +interfaces for PCI, I/O, and Memory. The previously +existing 18 interfaces have proven difficult to maintain +(any small change must be propagated across at least 6 +interfaces) and do not easily allow for future expansion to +64 bits if necessary. Also, on some systems, it would not +be appropriate to demultiplex the access width (8, 16, 32,or +64) before calling the OSL if the corresponding native OS +interfaces contain a similar access width parameter. For +these reasons, the 18 address space interfaces have been +replaced by these 6 new ones: + +AcpiOsReadPciConfiguration +AcpiOsWritePciConfiguration +AcpiOsReadMemory +AcpiOsWriteMemory +AcpiOsReadPort +AcpiOsWritePort + +Added a new interface named AcpiOsGetRootPointer to allow +the OSL to perform the platform and/or OS-specific actions +necessary to obtain the ACPI RSDP table pointer. On IA-32 +platforms, this interface will simply call down to the CA +core to perform the low-memory search for the table. On IA- +64, the RSDP is obtained from EFI. Migrating this interface +to the OSL allows the CA core to remain OS and platform +independent. + +Added a new interface named AcpiOsSignal to provide a +generic "function code and pointer" interface for various +miscellaneous signals and notifications that must be made to +the host OS. The first such signals are intended to +support the ASL Fatal and Breakpoint operators. In the +latter case, the AcpiOsBreakpoint interface has been +obsoleted. + +The definition of the AcpiFormatException interface has been +changed to simplify its use. The caller no longer must +supply a buffer to the call; A pointer to a const string is +now returned directly. This allows the call to be easily +used in printf statements, etc. since the caller does not +have to manage a local buffer. + + ASL Compiler, Version X2025: + +The ACPI 2.0 Switch/Case/Default operators have been +implemented and are fully functional. They will work with +all ACPI 1.0 interpreters, since the operators are simply +translated to If/Else pairs. + +The ACPI 2.0 ElseIf operator is implemented and will also +work with 1.0 interpreters, for the same reason. + +Implemented support for ACPI 2.0 variable-length packages. +These packages have a separate opcode, and their size is +determined by the interpreter at run-time. + +Documentation The ACPI CA Programmer Reference has been +updated to reflect the new interfaces and changes to +existing interfaces. + + ------------------------------------------ +Summary of changes for this label: 06_15_01 + + ACPI CA Core Subsystem: + +Fixed a problem where a DWORD-accessed field within a Buffer +object would get its byte address inadvertently rounded down +to the nearest DWORD. Buffers are always Byte-accessible. + + ASL Compiler, version X2024: + +Fixed a problem where the Switch() operator would either +fault or hang the compiler. Note however, that the AML code +for this ACPI 2.0 operator is not yet implemented. + +Compiler uses the new AcpiOsGetTimer interface to obtain +compile timings. + +Implementation of the CreateField operator automatically +converts a reference to a named field within a resource +descriptor from a byte offset to a bit offset if required. + +Added some missing named fields from the resource descriptor +support. These are the names that are automatically created +by the compiler to reference fields within a descriptor. +They are only valid at compile time and are not passed +through to the AML interpreter. + +Resource descriptor named fields are now typed as Integers +and subject to compile-time typechecking when used in +expressions. + + ------------------------------------------ +Summary of changes for this label: 05_18_01 + + ACPI CA Core Subsystem: + +Fixed a couple of problems in the Field support code where +bits from adjacent fields could be returned along with the +proper field bits. Restructured the field support code to +improve performance, readability and maintainability. + +New DEBUG_PRINTP macro automatically inserts the procedure +name into the output, saving hundreds of copies of procedure +name strings within the source, shrinking the memory +footprint of the debug version of the core subsystem. + + Source Code Structure: + +The source code directory tree was restructured to reflect +the current organization of the component architecture. +Some files and directories have been moved and/or renamed. + + Linux: + +Fixed leaking kacpidpc processes. + +Fixed queueing event data even when /proc/acpi/event is not +opened. + + ASL Compiler, version X2020: + +Memory allocation performance enhancement - over 24X compile +time improvement on large ASL files. Parse nodes and +namestring buffers are now allocated from a large internal +compiler buffer. + +The temporary .SRC file is deleted unless the "-s" option is +specified + +The "-d" debug output option now sends all output to the +.DBG file instead of the console. + +"External" second parameter is now optional + +"ElseIf" syntax now properly allows the predicate + +Last operand to "Load" now recognized as a Target operand + +Debug object can now be used anywhere as a normal object. + +ResourceTemplate now returns an object of type BUFFER + +EISAID now returns an object of type INTEGER + +"Index" now works with a STRING operand + +"LoadTable" now accepts optional parameters + +"ToString" length parameter is now optional + +"Interrupt (ResourceType," parse error fixed. + +"Register" with a user-defined region space parse error +fixed + +Escaped backslash at the end of a string ("\\") scan/parse +error fixed + +"Revision" is now an object of type INTEGER. + + + +------------------------------------------ +Summary of changes for this label: 05_02_01 + +Linux: + +/proc/acpi/event now blocks properly. + +Removed /proc/sys/acpi. You can still dump your DSDT from +/proc/acpi/dsdt. + + ACPI CA Core Subsystem: + +Fixed a problem introduced in the previous label where some +of the "small" resource descriptor types were not +recognized. + +Improved error messages for the case where an ASL Field is +outside the range of the parent operation region. + + ASL Compiler, version X2018: + +Added error detection for ASL Fields that extend beyond the +length of the parent operation region (only if the length of +the region is known at compile time.) This includes fields +that have a minimum access width that is smaller than the +parent region, and individual field units that are partially +or entirely beyond the extent of the parent. + + + +------------------------------------------ +Summary of changes for this label: 04_27_01 + + ACPI CA Core Subsystem: + +Fixed a problem where the namespace mutex could be released +at the wrong time during execution of +AcpiRemoveAddressSpaceHandler. + +Added optional thread ID output for debug traces, to +simplify debugging of multiple threads. Added context +switch notification when the debug code realizes that a +different thread is now executing ACPI code. + +Some additional external data types have been prefixed with +the string "ACPI_" for consistency. This may effect +existing code. The data types affected are the external +callback typedefs - e.g., WALK_CALLBACK becomes +ACPI_WALK_CALLBACK. + + Linux: + +Fixed an issue with the OSL semaphore implementation where a +thread was waking up with an error from receiving a SIGCHLD +signal. + +Linux version of ACPI CA now uses the system C library for +string manipulation routines instead of a local +implementation. + +Cleaned up comments and removed TBDs. + + ASL Compiler, version X2017: + +Enhanced error detection and reporting for all file I/O +operations. + + Documentation: + +Programmer Reference updated to version 1.06. + + + +------------------------------------------ +Summary of changes for this label: 04_13_01 + + ACPI CA Core Subsystem: + +Restructured support for BufferFields and RegionFields. +BankFields support is now fully operational. All known 32- +bit limitations on field sizes have been removed. Both +BufferFields and (Operation) RegionFields are now supported +by the same field management code. + +Resource support now supports QWORD address and IO +resources. The 16/32/64 bit address structures and the +Extended IRQ structure have been changed to properly handle +Source Resource strings. + +A ThreadId of -1 is now used to indicate a "mutex not +acquired" condition internally and must never be returned by +AcpiOsThreadId. This reserved value was changed from 0 since +Unix systems allow a thread ID of 0. + +Linux: + +Driver code reorganized to enhance portability + +Added a kernel configuration option to control ACPI_DEBUG + +Fixed the EC driver to honor _GLK. + +ASL Compiler, version X2016: + +Fixed support for the "FixedHw" keyword. Previously, the +FixedHw address space was set to 0, not 0x7f as it should +be. + + ------------------------------------------ +Summary of changes for this label: 03_13_01 + + ACPI CA Core Subsystem: + +During ACPI initialization, the _SB_._INI method is now run +if present. + +Notify handler fix - notifies are deferred until the parent +method completes execution. This fixes the "mutex already +acquired" issue seen occasionally. + +Part of the "implicit conversion" rules in ACPI 2.0 have +been found to cause compatibility problems with existing +ASL/AML. The convert "result-to-target-type" implementation +has been removed for stores to method Args and Locals. +Source operand conversion is still fully implemented. +Possible changes to ACPI 2.0 specification pending. + +Fix to AcpiRsCalculatePciRoutingTableLength to return +correct length. + +Fix for compiler warnings for 64-bit compiles. + + Linux: + +/proc output aligned for easier parsing. + +Release-version compile problem fixed. + +New kernel configuration options documented in +Configure.help. + +IBM 600E - Fixed Sleep button may generate "Invalid <NULL> +context" message. + + OSPM: + +Power resource driver integrated with bus manager. + +Fixed kernel fault during active cooling for thermal zones. + +Source Code: + +The source code tree has been restructured. + + + +------------------------------------------ +Summary of changes for this label: 03_02_01 + + Linux OS Services Layer (OSL): + +Major revision of all Linux-specific code. + +Modularized all ACPI-specific drivers. + +Added new thermal zone and power resource drivers. + +Revamped /proc interface (new functionality is under +/proc/acpi). + +New kernel configuration options. + + Linux known issues: + +New kernel configuration options not documented in +Configure.help yet. + +Module dependencies not currently implemented. If used, they +should be loaded in this order: busmgr, power, ec, system, +processor, battery, ac_adapter, button, thermal. + +Modules will not load if CONFIG_MODVERSION is set. + +IBM 600E - entering S5 may reboot instead of shutting down. + +IBM 600E - Sleep button may generate "Invalid <NULL> +context" message. + +Some systems may fail with "execution mutex already +acquired" message. + + ACPI CA Core Subsystem: + +Added a new OSL Interface, AcpiOsGetThreadId. This was +required for the deadlock detection code. Defined to return +a non-zero, 32-bit thread ID for the currently executing +thread. May be a non-zero constant integer on single-thread +systems. + +Implemented deadlock detection for internal subsystem +mutexes. We may add conditional compilation for this code +(debug only) later. + +ASL/AML Mutex object semantics are now fully supported. +This includes multiple acquires/releases by owner and +support for the Mutex SyncLevel parameter. + +A new "Force Release" mechanism automatically frees all ASL +Mutexes that have been acquired but not released when a +thread exits the interpreter. This forces conformance to +the ACPI spec ("All mutexes must be released when an +invocation exits") and prevents deadlocked ASL threads. +This mechanism can be expanded (later) to monitor other +resource acquisitions if OEM ASL code continues to misbehave +(which it will). + +Several new ACPI exception codes have been added for the +Mutex support. + +Recursive method calls are now allowed and supported (the +ACPI spec does in fact allow recursive method calls.) The +number of recursive calls is subject to the restrictions +imposed by the SERIALIZED method keyword and SyncLevel (ACPI +2.0) method parameter. + +Implemented support for the SyncLevel parameter for control +methods (ACPI 2.0 feature) + +Fixed a deadlock problem when multiple threads attempted to +use the interpreter. + +Fixed a problem where the string length of a String package +element was not always set in a package returned from +AcpiEvaluateObject. + +Fixed a problem where the length of a String package element +was not always included in the length of the overall package +returned from AcpiEvaluateObject. + +Added external interfaces (Acpi*) to the ACPI debug memory +manager. This manager keeps a list of all outstanding +allocations, and can therefore detect memory leaks and +attempts to free memory blocks more than once. Useful for +code such as the power manager, etc. May not be appropriate +for device drivers. Performance with the debug code enabled +is slow. + +The ACPI Global Lock is now an optional hardware element. + + ASL Compiler Version X2015: + +Integrated changes to allow the compiler to be generated on +multiple platforms. + +Linux makefile added to generate the compiler on Linux + + Source Code: + +All platform-specific headers have been moved to their own +subdirectory, Include/Platform. + +New source file added, Interpreter/ammutex.c + +New header file, Include/acstruct.h + + Documentation: + +The programmer reference has been updated for the following +new interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate +AcpiFree + + ------------------------------------------ +Summary of changes for this label: 02_08_01 + +Core ACPI CA Subsystem: Fixed a problem where an error was +incorrectly returned if the return resource buffer was +larger than the actual data (in the resource interfaces). + +References to named objects within packages are resolved to +the full pathname string before packages are returned +directly (via the AcpiEvaluateObject interface) or +indirectly via the resource interfaces. + +Linux OS Services Layer (OSL): + +Improved /proc battery interface. + + +Added C-state debugging output and other miscellaneous +fixes. + +ASL Compiler Version X2014: + +All defined method arguments can now be used as local +variables, including the ones that are not actually passed +in as parameters. The compiler tracks initialization of the +arguments and issues an exception if they are used without +prior assignment (just like locals). + +The -o option now specifies a filename prefix that is used +for all output files, including the AML output file. +Otherwise, the default behavior is as follows: 1) the AML +goes to the file specified in the DSDT. 2) all other output +files use the input source filename as the base. + + ------------------------------------------ +Summary of changes for this label: 01_25_01 + +Core ACPI CA Subsystem: Restructured the implementation of +object store support within the interpreter. This includes +support for the Store operator as well as any ASL operators +that include a target operand. + +Partially implemented support for Implicit Result-to-Target +conversion. This is when a result object is converted on the +fly to the type of an existing target object. Completion +of this support is pending further analysis of the ACPI +specification concerning this matter. + +CPU-specific code has been removed from the subsystem +(hardware directory). + +New Power Management Timer functions added + +Linux OS Services Layer (OSL): Moved system state transition +code to the core, fixed it, and modified Linux OSL +accordingly. + +Fixed C2 and C3 latency calculations. + + +We no longer use the compilation date for the version +message on initialization, but retrieve the version from +AcpiGetSystemInfo(). + +Incorporated for fix Sony VAIO machines. + +Documentation: The Programmer Reference has been updated +and reformatted. + + +ASL Compiler: Version X2013: Fixed a problem where the line +numbering and error reporting could get out of sync in the +presence of multiple include files. + + ------------------------------------------ +Summary of changes for this label: 01_15_01 + +Core ACPI CA Subsystem: + +Implemented support for type conversions in the execution of +the ASL Concatenate operator (The second operand is +converted to match the type of the first operand before +concatenation.) + +Support for implicit source operand conversion is partially +implemented. The ASL source operand types Integer, Buffer, +and String are freely interchangeable for most ASL +operators and are converted by the interpreter on the fly +as required. Implicit Target operand conversion (where the +result is converted to the target type before storing) is +not yet implemented. + +Support for 32-bit and 64-bit BCD integers is implemented. + +Problem fixed where a field read on an aligned field could +cause a read past the end of the field. + +New exception, AE_AML_NO_RETURN_VALUE, is returned when a +method does not return a value, but the caller expects one. +(The ASL compiler flags this as a warning.) + +ASL Compiler: + +Version X2011: +1. Static typechecking of all operands is implemented. This +prevents the use of invalid objects (such as using a Package +where an Integer is required) at compile time instead of at +interpreter run-time. +2. The ASL source line is printed with ALL errors and +warnings. +3. Bug fix for source EOF without final linefeed. +4. Debug option is split into a parse trace and a namespace +trace. +5. Namespace output option (-n) includes initial values for +integers and strings. +6. Parse-only option added for quick syntax checking. +7. Compiler checks for duplicate ACPI name declarations + +Version X2012: +1. Relaxed typechecking to allow interchangeability between +strings, integers, and buffers. These types are now +converted by the interpreter at runtime. +2. Compiler reports time taken by each internal subsystem in +the debug output file. + + + ------------------------------------------ +Summary of changes for this label: 12_14_00 + +ASL Compiler: + +This is the first official release of the compiler. Since +the compiler requires elements of the Core Subsystem, this +label synchronizes everything. + +------------------------------------------ +Summary of changes for this label: 12_08_00 + +Fixed a problem where named references within the ASL +definition of both OperationRegions and CreateXXXFields did +not work properly. The symptom was an AE_AML_OPERAND_TYPE +during initialization of the region/field. This is similar +(but not related internally) to the problem that was fixed +in the last label. + +Implemented both 32-bit and 64-bit support for the BCD ASL +functions ToBCD and FromBCD. + +Updated all legal headers to include "2000" in the copyright +years. + + ------------------------------------------ +Summary of changes for this label: 12_01_00 + +Fixed a problem where method invocations within the ASL +definition of both OperationRegions and CreateXXXFields did +not work properly. The symptom was an AE_AML_OPERAND_TYPE +during initialization of the region/field: + + nsinit-0209: AE_AML_OPERAND_TYPE while getting region +arguments [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad +operand(s) (0x3005) + +Fixed a problem where operators with more than one nested +subexpression would fail. The symptoms were varied, by +mostly AE_AML_OPERAND_TYPE errors. This was actually a +rather serious problem that has gone unnoticed until now. + + Subtract (Add (1,2), Multiply (3,4)) + +Fixed a problem where AcpiGetHandle didn't quite get fixed +in the previous build (The prefix part of a relative path +was handled incorrectly). + +Fixed a problem where Operation Region initialization failed +if the operation region name was a "namepath" instead of a +simple "nameseg". Symptom was an AE_NO_OPERAND error. + +Fixed a problem where an assignment to a local variable via +the indirect RefOf mechanism only worked for the first such +assignment. Subsequent assignments were ignored. + + ------------------------------------------ +Summary of changes for this label: 11_15_00 + +ACPI 2.0 table support with backwards support for ACPI 1.0 +and the 0.71 extensions. Note: although we can read ACPI +2.0 BIOS tables, the AML interpreter does NOT have support +for the new 2.0 ASL grammar terms at this time. + +All ACPI hardware access is via the GAS structures in the +ACPI 2.0 FADT. + +All physical memory addresses across all platforms are now +64 bits wide. Logical address width remains dependent on the +platform (i.e., "void *"). + +AcpiOsMapMemory interface changed to a 64-bit physical +address. + +The AML interpreter integer size is now 64 bits, as per the +ACPI 2.0 specification. + +For backwards compatibility with ACPI 1.0, ACPI tables with +a revision number less than 2 use 32-bit integers only. + +Fixed a problem where the evaluation of OpRegion operands +did not always resolve them to numbers properly. + +------------------------------------------ +Summary of changes for this label: 10_20_00 + +Fix for CBN_._STA issue. This fix will allow correct access +to CBN_ OpRegions when the _STA returns 0x8. + +Support to convert ACPI constants (Ones, Zeros, One) to +actual values before a package object is returned + +Fix for method call as predicate to if/while construct +causing incorrect if/while behavior + +Fix for Else block package lengths sometimes calculated +wrong (if block > 63 bytes) + +Fix for Processor object length field, was always zero + +Table load abort if FACP sanity check fails + +Fix for problem with Scope(name) if name already exists + +Warning emitted if a named object referenced cannot be found +(resolved) during method execution. + + + + + +------------------------------------------ +Summary of changes for this label: 9_29_00 + +New table initialization interfaces: AcpiInitializeSubsystem +no longer has any parameters AcpiFindRootPointer - Find the +RSDP (if necessary) AcpiLoadTables (RSDP) - load all tables +found at RSDP->RSDT Obsolete Interfaces +AcpiLoadFirmwareTables - replaced by AcpiLoadTables + +Note: These interface changes require changes to all +existing OSDs + +The PCI_Config default address space handler is always +installed at the root namespace object. + +------------------------------------------- +Summary of changes for this label: 09_15_00 + +The new initialization architecture is implemented. New +interfaces are: AcpiInitializeSubsystem (replaces +AcpiInitialize) AcpiEnableSubsystem Obsolete Interfaces: +AcpiLoadNamespace (Namespace is automatically loaded when a +table is loaded) + +The ACPI_OPERAND_OBJECT has been optimized to shrink its +size from 52 bytes to 32 bytes. There is usually one of +these for every namespace object, so the memory savings is +significant. + +Implemented just-in-time evaluation of the CreateField +operators. + +Bug fixes for IA-64 support have been integrated. + +Additional code review comments have been implemented + +The so-called "third pass parse" has been replaced by a +final walk through the namespace to initialize all operation +regions (address spaces) and fields that have not yet been +initialized during the execution of the various _INI and REG +methods. + +New file - namespace/nsinit.c + +------------------------------------------- +Summary of changes for this label: 09_01_00 + +Namespace manager data structures have been reworked to +change the primary object from a table to a single object. +This has resulted in dynamic memory savings of 3X within +the namespace and 2X overall in the ACPI CA subsystem. + +Fixed problem where the call to AcpiEvFindPciRootBuses was +inadvertently left commented out. + +Reduced the warning count when generating the source with +the GCC compiler. + +Revision numbers added to each module header showing the +SourceSafe version of the file. Please refer to this +version number when giving us feedback or comments on +individual modules. + +The main object types within the subsystem have been renamed +to clarify their purpose: + +ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT +ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT +ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE + +NOTE: no changes to the initialization sequence are included +in this label. + +------------------------------------------- +Summary of changes for this label: 08_23_00 + +Fixed problem where TerminateControlMethod was being called +multiple times per method + +Fixed debugger problem where single stepping caused a +semaphore to be oversignalled + +Improved performance through additional parse object caching +- added ACPI_EXTENDED_OP type + +------------------------------------------- +Summary of changes for this label: 08_10_00 + +Parser/Interpreter integration: Eliminated the creation of +complete parse trees for ACPI tables and control methods. +Instead, parse subtrees are created and then deleted as +soon as they are processed (Either entered into the +namespace or executed by the interpreter). This reduces +the use of dynamic kernel memory significantly. (about 10X) + +Exception codes broken into classes and renumbered. Be sure +to recompile all code that includes acexcep.h. Hopefully +we won't have to renumber the codes again now that they are +split into classes (environment, programmer, AML code, ACPI +table, and internal). + +Fixed some additional alignment issues in the Resource +Manager subcomponent + +Implemented semaphore tracking in the AcpiExec utility, and +fixed several places where mutexes/semaphores were being +unlocked without a corresponding lock operation. There are +no known semaphore or mutex "leaks" at this time. + +Fixed the case where an ASL Return operator is used to +return an unnamed package. + +------------------------------------------- +Summary of changes for this label: 07_28_00 + +Fixed a problem with the way addresses were calculated in +AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This +problem manifested itself when a Field was created with +WordAccess or DwordAccess, but the field unit defined within +the Field was less than a Word or Dword. + +Fixed a problem in AmlDumpOperands() module's loop to pull +operands off of the operand stack to display information. +The problem manifested itself as a TLB error on 64-bit +systems when accessing an operand stack with two or more +operands. + +Fixed a problem with the PCI configuration space handlers +where context was getting confused between accesses. This +required a change to the generic address space handler and +address space setup definitions. Handlers now get both a +global handler context (this is the one passed in by the +user when executing AcpiInstallAddressSpaceHandler() and a +specific region context that is unique to each region (For +example, the _ADR, _SEG and _BBN values associated with a +specific region). The generic function definitions have +changed to the following: + +typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 +Function, UINT32 Address, UINT32 BitWidth, UINT32 *Value, +void *HandlerContext, // This used to be void *Context void +*RegionContext); // This is an additional parameter + +typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE +RegionHandle, UINT32 Function, void *HandlerContext, void +**RegionContext); // This used to be **ReturnContext + +------------------------------------------- +Summary of changes for this label: 07_21_00 + +Major file consolidation and rename. All files within the +interpreter have been renamed as well as most header files. +This was done to prevent collisions with existing files in +the host OSs -- filenames such as "config.h" and "global.h" +seem to be quite common. The VC project files have been +updated. All makefiles will require modification. + +The parser/interpreter integration continues in Phase 5 with +the implementation of a complete 2-pass parse (the AML is +parsed twice) for each table; This avoids the construction +of a huge parse tree and therefore reduces the amount of +dynamic memory required by the subsystem. Greater use of +the parse object cache means that performance is +unaffected. + +Many comments from the two code reviews have been rolled in. + +The 64-bit alignment support is complete. + +------------------------------------------- +Summary of changes for this label: 06_30_00 + +With a nod and a tip of the hat to the technology of +yesteryear, we've added support in the source code for 80 +column output devices. The code is now mostly constrained +to 80 columns or less to support environments and editors +that 1) cannot display or print more than 80 characters on +a single line, and 2) cannot disable line wrapping. + +A major restructuring of the namespace data structure has +been completed. The result is 1) cleaner and more +understandable/maintainable code, and 2) a significant +reduction in the dynamic memory requirement for each named +ACPI object (almost half). + +------------------------------------------- +Summary of changes for this label: 06_23_00 + +Linux support has been added. In order to obtain approval +to get the ACPI CA subsystem into the Linux kernel, we've +had to make quite a few changes to the base subsystem that +will affect all users (all the changes are generic and OS- +independent). The effects of these global changes have been +somewhat far reaching. Files have been merged and/or +renamed and interfaces have been renamed. The major +changes are described below. + +Osd* interfaces renamed to AcpiOs* to eliminate namespace +pollution/confusion within our target kernels. All OSD +interfaces must be modified to match the new naming +convention. + +Files merged across the subsystem. A number of the smaller +source and header files have been merged to reduce the file +count and increase the density of the existing files. +There are too many to list here. In general, makefiles that +call out individual files will require rebuilding. + +Interpreter files renamed. All interpreter files now have +the prefix am* instead of ie* and is*. + +Header files renamed: The acapi.h file is now acpixf.h. +The acpiosd.h file is now acpiosxf.h. We are removing +references to the acronym "API" since it is somewhat +windowsy. The new name is "external interface" or xface or +xf in the filenames.j + + +All manifest constants have been forced to upper case (some +were mixed case.) Also, the string "ACPI_" has been +prepended to many (not all) of the constants, typedefs, and +structs. + +The globals "DebugLevel" and "DebugLayer" have been renamed +"AcpiDbgLevel" and "AcpiDbgLayer" respectively. + +All other globals within the subsystem are now prefixed with +"AcpiGbl_" Internal procedures within the subsystem are now +prefixed with "Acpi" (with only a few exceptions). The +original two-letter abbreviation for the subcomponent +remains after "Acpi" - for example, CmCallocate became +AcpiCmCallocate. + +Added a source code translation/conversion utility. Used to +generate the Linux source code, it can be modified to +generate other types of source as well. Can also be used to +cleanup existing source by removing extraneous spaces and +blank lines. Found in tools/acpisrc/* + +OsdUnMapMemory was renamed to OsdUnmapMemory and then +AcpiOsUnmapMemory. (UnMap became Unmap). + +A "MaxUnits" parameter has been added to +AcpiOsCreateSemaphore. When set to one, this indicates +that the caller wants to use the semaphore as a mutex, not a +counting semaphore. ACPI CA uses both types. However, +implementers of this call may want to use different OS +primitives depending on the type of semaphore requested. +For example, some operating systems provide separate "mutex" +and "semaphore" interfaces - where the mutex interface is +much faster because it doesn't have all the overhead of a +full semaphore implementation. + +Fixed a deadlock problem where a method that accesses the +PCI address space can block forever if it is the first +access to the space. + +------------------------------------------- +Summary of changes for this label: 06_02_00 + +Support for environments that cannot handle unaligned data +accesses (e.g. firmware and OS environments devoid of +alignment handler technology namely SAL/EFI and the IA-64 +Linux kernel) has been added (via configurable macros) in +these three areas: - Transfer of data from the raw AML byte +stream is done via byte moves instead of word/dword/qword +moves. - External objects are aligned within the user +buffer, including package elements (sub-objects). - +Conversion of name strings to UINT32 Acpi Names is now done +byte-wise. + +The Store operator was modified to mimic Microsoft's +implementation when storing to a Buffer Field. + +Added a check of the BM_STS bit before entering C3. + +The methods subdirectory has been obsoleted and removed. A +new file, cmeval.c subsumes the functionality. + +A 16-bit (DOS) version of AcpiExec has been developed. The +makefile is under the acpiexec directory. |
