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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..3b82a15 --- /dev/null +++ b/sys/contrib/dev/acpica/CHANGES.txt @@ -0,0 +1,3203 @@ +---------------------------------------- +15 November 2002. Summary of changes for version 20021115. + +1) ACPI CA Core Subsystem: + +Fixed a memory leak problem where an error during resolution +of method arguments during a method invocation from another +method failed to cleanup properly by deleting all successfully +resolved argument objects. + +Fixed a problem where the target of the Index() operator was +not correctly constructed if the source object was a package. +This problem has not been detected because the use of a target +operand with Index() is very rare. + +Fixed a problem with the Index() operator where an attempt was +made to delete the operand objects twice. + +Fixed a problem where an attempt was made to delete an operand +twice during execution of the CondRefOf() operator if the +target did not exist. + +Implemented the first of perhaps several internal create +object functions that create and initialize a specific object +type. This consolidates duplicated code wherever the object +is created, thus shrinking the size of the subsystem. + +Implemented improved debug/error messages for errors that +occur during nested method invocations. All executing method +pathnames are displayed (with the error) as the call stack is +unwound - thus simplifying debug. + +Fixed a problem introduced in the 10/02 release that caused +premature deletion of a buffer object if a buffer was used as +an ASL operand where an integer operand is required (Thus +causing an implicit object conversion from Buffer to Integer.) +The change in the 10/02 release was attempting to fix a memory +leak (albeit incorrectly.) + +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 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 Release + Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total + Debug Version: 153.1K Code, 63.3K Data, 216.4K Total + Current Release: + Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total + Debug Version: 152.7K Code, 63.2K Data, 215.5K Total + + +2) Linux + +Changed the implementation of the ACPI semaphores to use +down() instead of down_interruptable(). It is important that +the execution of ACPI control methods not be interrupted by +signals. Methods must run to completion, or the system may be +left in an unknown/unstable state. + +Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not +set. (Shawn Starr) + + +3) iASL Compiler/Disassembler + +Changed the default location of output files. All output +files are now placed in the current directory by default +instead of in the directory of the source file. This change +may affect some existing makefiles, but it brings the behavior +of the compiler in line with other similar tools. The +location of the output files can be overridden with the -p +command line switch. + + +---------------------------------------- +11 November 2002. Summary of changes for version 20021111. + + +0) ACPI Specification 2.0B is released and is now available +at: http://www.acpi.info/index.html + + +1) ACPI CA Core Subsystem: + +Implemented support for the ACPI 2.0 SMBus Operation Regions. +This includes the early detection and handoff of the request +to the SMBus region handler (avoiding all of the complex field +support code), and support for the bidirectional return packet +from an SMBus write operation. This paves the way for the +development of SMBus drivers in each host operating system. + +Fixed a problem where the semaphore WAIT_FOREVER constant was +defined as 32 bits, but must be 16 bits according to the ACPI +specification. This had the side effect of causing ASL +Mutex/Event timeouts even though the ASL code requested a wait +forever. Changed all internal references to the ACPI timeout +parameter to 16 bits to prevent future problems. Changed the +name of WAIT_FOREVER to ACPI_WAIT_FOREVER. + +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 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 Release + Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total + Debug Version: 152.3K Code, 63.0K Data, 215.3K Total + Current Release: + Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total + Debug Version: 153.1K Code, 63.3K Data, 216.4K Total + + +2) Linux + +Module loading/unloading fixes (John Cagle) + + +3) iASL Compiler/Disassembler + +Added support for the SMBBlockProcessCall keyword (ACPI 2.0) + +Implemented support for the disassembly of all SMBus protocol +keywords (SMBQuick, SMBWord, etc.) + +---------------------------------------- +01 November 2002. Summary of changes for version 20021101. + + +1) ACPI CA Core Subsystem: + +Fixed a problem where platforms that have a GPE1 block but no +GPE0 block were not handled correctly. This resulted in a +"GPE overlap" error message. GPE0 is no longer required. + +Removed code added in the previous release that inserted nodes +into the namespace in alphabetical order. This caused some +side-effects on various machines. The root cause of the +problem is still under investigation since in theory, the +internal ordering of the namespace nodes should not matter. + +Enhanced error reporting for the case where a named object is +not found during control method execution. The full ACPI +namepath (name reference) of the object that was not found is +displayed in this case. + +Note: as a result of the overhaul of the namespace object +types in the previous release, the namespace nodes for the +predefined scopes (_TZ, _PR, etc.) are now of the type +ACPI_TYPE_LOCAL_SCOPE instead of ACPI_TYPE_ANY. This +simplifies the namespace management code but may affect code +that walks the namespace tree looking for specific object +types. + +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 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 Release + Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total + Debug Version: 151.7K Code, 62.4K Data, 214.1K Total + Current Release: + Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total + Debug Version: 152.3K Code, 63.0K Data, 215.3K Total + + +2) Linux + +Fixed a problem introduced in the previous release where the +Processor and Thermal objects were not recognized and +installed in /proc. This was related to the scope type change +described above. + + +3) iASL Compiler/Disassembler + +Implemented the -g option to get all of the required ACPI +tables from the registry and save them to files (Windows +version of the compiler only.) The required tables are the +FADT, FACS, and DSDT. + +Added ACPI table checksum validation during table disassembly +in order to catch corrupted tables. + + +---------------------------------------- +22 October 2002. Summary of changes for version 20021022. + +1) ACPI CA Core Subsystem: + +Implemented a restriction on the Scope operator that the +target must already exist in the namespace at the time the +operator is encountered (during table load or method +execution). In other words, forward references are not +allowed and Scope() cannot create a new object. This changes +the previous behavior where the interpreter would create the +name if not found. This new behavior correctly enables the +search-to-root algorithm during namespace lookup of the target +name. Because of this upsearch, this fixes the known Compaq +_SB_.OKEC problem and makes both the AML interpreter and iASL +compiler compatible with other ACPI implementations. + +Completed a major overhaul of the internal ACPI object types +for the ACPI Namespace and the associated operand objects. +Many of these types had become obsolete with the introduction +of the two-pass namespace load. This cleanup simplifies the +code and makes the entire namespace load mechanism much +clearer and easier to understand. + +Improved debug output for tracking scope opening/closing to +help diagnose scoping issues. The old scope name as well as +the new scope name are displayed. Also improved error +messages for problems with ASL Mutex objects and error +messages for GPE problems. + +Cleaned up the namespace dump code, removed obsolete code. + +All string output (for all namespace/object dumps) now uses +the common ACPI string output procedure which handles escapes +properly and does not emit non-printable characters. + +Fixed some issues with constants in the 64-bit version of the +local C library (utclib.c) + + +2) Linux + +EC Driver: No longer attempts to acquire the Global Lock at +interrupt level. + + +3) iASL Compiler/Disassembler + +Implemented ACPI 2.0B grammar change that disallows all Type 1 +and 2 opcodes outside of a control method. This means that +the "executable" operators (versus the "namespace" operators) +cannot be used at the table level; they can only be used +within a control method. + +Implemented the restriction on the Scope() operator where the +target must already exist in the namespace at the time the +operator is encountered (during ASL compilation). In other +words, forward references are not allowed and Scope() cannot +create a new object. This makes the iASL compiler compatible +with other ACPI implementations and makes the Scope() +implementation adhere to the ACPI specification. + +Fixed a problem where namepath optimization for the Alias +operator was optimizing the wrong path (of the two namepaths.) +This caused a "Missing alias link" error message. + +Fixed a problem where an "unknown reserved name" warning could +be incorrectly generated for names like "_SB" when the +trailing underscore is not used in the original ASL. + +Fixed a problem where the reserved name check did not handle +NamePaths with multiple NameSegs correctly. The first nameseg +of the NamePath was examined instead of the last NameSeg. + + +---------------------------------------- + +02 October 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem version 20021002: + +Fixed a problem where a store/copy of a string to an existing +string did not always set the string length properly in the +String object. + +Fixed a reported problem with the ToString operator where the +behavior was identical to the ToHexString operator instead of +just simply converting a raw buffer to a string data type. + +Fixed a problem where CopyObject and the other "explicit" +conversion operators were not updating the internal namespace +node type as part of the store operation. + +Fixed a memory leak during implicit source operand conversion +where the original object was not deleted if it was converted +to a new object of a different type. + +Enhanced error messages for all problems associated with +namespace lookups. Common procedure generates and prints the +lookup name as well as the formatted status. + +Completed implementation of a new design for the Alias support +within the namespace. The existing design did not handle the +case where a new object was assigned to one of the two names +due to the use of an explicit conversion operator, resulting +in the two names pointing to two different objects. The new +design simply points the Alias name to the original name node +- not to the object. This results in a level of indirection +that must be handled in the name resolution mechanism. + +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: 69.6K Code, 8.3K Data, 77.9K Total + Debug Version: 150.0K Code, 61.7K Data, 211.7K Total + Current Release: + Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total + Debug Version: 151.7K Code, 62.4K Data, 214.1K Total + + +2) Linux + +Initialize thermal driver's timer before it is used. (Knut +Neumann) + +Allow handling negative celsius values. (Kochi Takayoshi) + +Fix thermal management and make trip points. R/W (Pavel +Machek) + +Fix /proc/acpi/sleep. (P. Christeas) + +IA64 fixes. (David Mosberger) + +Fix reversed logic in blacklist code. (Sergio Monteiro Basto) + +Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik +Brodowski) + + +3) iASL Compiler/Disassembler + +Clarified some warning/error messages. + + +---------------------------------------- +18 September 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem version 20020918: + +Fixed a reported problem with reference chaining (via the +Index() and RefOf() operators) in the ObjectType() and +SizeOf() operators. The definition of these operators +includes the dereferencing of all chained references to return +information on the base object. + +Fixed a problem with stores to indexed package elements - the +existing code would not complete the store if an "implicit +conversion" was not performed. In other words, if the +existing object (package element) was to be replaced +completely, the code didn't handle this case. + +Relaxed typechecking on the ASL "Scope" operator to allow the +target name to refer to an object of type Integer, String, or +Buffer, in addition to the scoping object types (Device, +predefined Scopes, Processor, PowerResource, and ThermalZone.) +This allows existing AML code that has workarounds for a bug +in Windows to function properly. A warning is issued, +however. This affects both the AML interpreter and the iASL +compiler. Below is an example of this type of ASL code: + + Name(DEB,0x00) + Scope(DEB) + { + +Fixed some reported problems with 64-bit integer support in +the local implementation of C library functions (clib.c) + + +2) Linux + +Use ACPI fix map region instead of IOAPIC region, since it is +undefined in non-SMP. + +Ensure that the SCI has the proper polarity and trigger, even +on systems that do not have an interrupt override entry in the +MADT. + +2.5 big driver reorganization (Pat Mochel) + +Use early table mapping code from acpitable.c (Andi Kleen) + +New blacklist entries (Andi Kleen) + +Blacklist improvements. Split blacklist code out into a +separate file. Move checking the blacklist to very early. +Previously, we would use ACPI tables, and then halfway through +init, check the blacklist -- too late. Now, it's early enough +to completely fall-back to non-ACPI. + + +3) iASL Compiler/Disassembler version 20020918: + +Fixed a problem where the typechecking code didn't know that +an alias could point to a method. In other words, aliases +were not being dereferenced during typechecking. + + +---------------------------------------- +29 August 2002. Summary of changes for this release. + +1) ACPI CA Core Subsystem Version 20020829: + +If the target of a Scope() operator already exists, it must be +an object type that actually opens a scope -- such as a +Device, Method, Scope, etc. This is a fatal runtime error. +Similar error check has been added to the iASL compiler also. + +Tightened up the namespace load to disallow multiple names in +the same scope. This previously was allowed if both objects +were of the same type. (i.e., a lookup was the same as +entering a new name). + + +2) Linux + +Ensure that the ACPI interrupt has the proper trigger and +polarity. + +local_irq_disable is extraneous. (Matthew Wilcox) + +Make "acpi=off" actually do what it says, and not use the ACPI +interpreter *or* the tables. + +Added arch-neutral support for parsing SLIT and SRAT tables +(Kochi Takayoshi) + + +3) iASL Compiler/Disassembler Version 20020829: + +Implemented namepath optimization for name declarations. For +example, a declaration like "Method (\_SB_.ABCD)" would get +optimized to "Method (ABCD)" if the declaration is within the +\_SB_ scope. This optimization is in addition to the named +reference path optimization first released in the previous +version. This would seem to complete all possible +optimizations for namepaths within the ASL/AML. + +If the target of a Scope() operator already exists, it must be +an object type that actually opens a scope -- such as a +Device, Method, Scope, etc. + +Implemented a check and warning for unreachable code in the +same block below a Return() statement. + +Fixed a problem where the listing file was not generated if +the compiler aborted if the maximum error count was exceeded +(200). + +Fixed a problem where the typechecking of method return values +was broken. This includes the check for a return value when +the method is invoked as a TermArg (a return value is +expected.) + +Fixed a reported problem where EOF conditions during a quoted +string or comment caused a fault. + + +---------------------------------------- +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. |
