mirror of
https://github.com/acpica/acpica/
synced 2024-12-25 20:06:53 +03:00
Split all internal Global Lock functions to new file - evglock.c
These functions were moved from evmisc.c
This commit is contained in:
parent
b7fb31cc1d
commit
a831d91d07
@ -56,6 +56,7 @@ OBJS = \
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dswscope.o \
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dswstate.o \
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evevent.o \
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evglock.o \
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evgpe.o \
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evgpeblk.o \
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evgpeinit.o \
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@ -309,6 +310,9 @@ dswstate.o : $(ACPICA_CORE)/dispatcher/dswstate.c
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evevent.o : $(ACPICA_CORE)/events/evevent.c
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$(COMPILE)
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evglock.o : $(ACPICA_CORE)/events/evglock.c
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$(COMPILE)
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evgpe.o : $(ACPICA_CORE)/events/evgpe.c
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$(COMPILE)
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@ -1306,6 +1306,28 @@
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/>
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</FileConfiguration>
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</File>
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<File
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RelativePath="..\..\source\components\events\evglock.c"
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>
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<FileConfiguration
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Name="Debug|Win32"
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>
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<Tool
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Name="VCCLCompilerTool"
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AdditionalIncludeDirectories=""
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PreprocessorDefinitions=""
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/>
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</FileConfiguration>
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<FileConfiguration
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Name="Release|Win32"
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>
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<Tool
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Name="VCCLCompilerTool"
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AdditionalIncludeDirectories=""
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PreprocessorDefinitions=""
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/>
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</FileConfiguration>
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</File>
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<File
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RelativePath="..\..\source\COMPONENTS\EVENTS\evgpe.c"
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>
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@ -690,6 +690,28 @@
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/>
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</FileConfiguration>
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</File>
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<File
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RelativePath="..\..\source\components\events\evglock.c"
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>
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<FileConfiguration
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Name="Debug|Win32"
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>
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<Tool
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Name="VCCLCompilerTool"
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AdditionalIncludeDirectories=""
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PreprocessorDefinitions=""
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/>
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</FileConfiguration>
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<FileConfiguration
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Name="Release|Win32"
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>
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<Tool
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Name="VCCLCompilerTool"
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AdditionalIncludeDirectories=""
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PreprocessorDefinitions=""
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/>
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</FileConfiguration>
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</File>
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<File
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RelativePath="..\..\source\COMPONENTS\EVENTS\evgpe.c"
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>
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@ -2078,6 +2078,28 @@
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/>
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</FileConfiguration>
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</File>
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<File
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RelativePath="..\..\source\components\events\evglock.c"
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>
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<FileConfiguration
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Name="Debug|Win32"
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>
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<Tool
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Name="VCCLCompilerTool"
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AdditionalIncludeDirectories=""
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PreprocessorDefinitions=""
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/>
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</FileConfiguration>
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<FileConfiguration
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Name="Release|Win32"
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>
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<Tool
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Name="VCCLCompilerTool"
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AdditionalIncludeDirectories=""
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PreprocessorDefinitions=""
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/>
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</FileConfiguration>
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</File>
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<File
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RelativePath="..\..\source\COMPONENTS\EVENTS\evgpe.c"
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>
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@ -51,6 +51,7 @@ OBJS = \
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dswscope.o \
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dswstate.o \
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evevent.o \
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evglock.o \
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evgpe.o \
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evgpeblk.o \
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evgpeinit.o \
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@ -304,6 +305,9 @@ dswstate.o : $(ACPICA_CORE)/dispatcher/dswstate.c
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evevent.o : $(ACPICA_CORE)/events/evevent.c
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$(COMPILE)
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evglock.o : $(ACPICA_CORE)/events/evglock.c
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$(COMPILE)
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evgpe.o : $(ACPICA_CORE)/events/evgpe.c
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$(COMPILE)
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439
source/components/events/evglock.c
Normal file
439
source/components/events/evglock.c
Normal file
@ -0,0 +1,439 @@
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/******************************************************************************
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*
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* Module Name: evglock - Global Lock support
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#include "acpi.h"
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#include "accommon.h"
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#include "acevents.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evglock")
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/* Local prototypes */
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static UINT32
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AcpiEvGlobalLockHandler (
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void *Context);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInitGlobalLockHandler
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for the global lock release event
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInitGlobalLockHandler (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvInitGlobalLockHandler);
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/* Attempt installation of the global lock handler */
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Status = AcpiInstallFixedEventHandler (ACPI_EVENT_GLOBAL,
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AcpiEvGlobalLockHandler, NULL);
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/*
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* If the global lock does not exist on this platform, the attempt to
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* enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick).
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* Map to AE_OK, but mark global lock as not present. Any attempt to
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* actually use the global lock will be flagged with an error.
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*/
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AcpiGbl_GlobalLockPresent = FALSE;
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if (Status == AE_NO_HARDWARE_RESPONSE)
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{
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ACPI_ERROR ((AE_INFO,
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"No response from Global Lock hardware, disabling lock"));
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return_ACPI_STATUS (AE_OK);
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}
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Status = AcpiOsCreateLock (&AcpiGbl_GlobalLockPendingLock);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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AcpiGbl_GlobalLockPending = FALSE;
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AcpiGbl_GlobalLockPresent = TRUE;
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvRemoveGlobalLockHandler
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove the handler for the Global Lock
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvRemoveGlobalLockHandler (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvRemoveGlobalLockHandler);
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AcpiGbl_GlobalLockPresent = FALSE;
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Status = AcpiRemoveFixedEventHandler (ACPI_EVENT_GLOBAL,
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AcpiEvGlobalLockHandler);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGlobalLockHandler
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*
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* PARAMETERS: Context - From thread interface, not used
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*
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* RETURN: ACPI_INTERRUPT_HANDLED
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*
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* DESCRIPTION: Invoked directly from the SCI handler when a global lock
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* release interrupt occurs. If there is actually a pending
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* request for the lock, signal the waiting thread.
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*
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******************************************************************************/
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static UINT32
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AcpiEvGlobalLockHandler (
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void *Context)
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{
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ACPI_STATUS Status;
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ACPI_CPU_FLAGS Flags;
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Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
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/*
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* If a request for the global lock is not actually pending,
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* we are done. This handles "spurious" global lock interrupts
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* which are possible (and have been seen) with bad BIOSs.
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*/
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if (!AcpiGbl_GlobalLockPending)
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{
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goto CleanupAndExit;
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}
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/*
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* Send a unit to the global lock semaphore. The actual acquisition
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* of the global lock will be performed by the waiting thread.
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*/
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Status = AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, 1);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Could not signal Global Lock semaphore"));
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}
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AcpiGbl_GlobalLockPending = FALSE;
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CleanupAndExit:
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AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
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return (ACPI_INTERRUPT_HANDLED);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiEvAcquireGlobalLock
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*
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* PARAMETERS: Timeout - Max time to wait for the lock, in millisec.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Attempt to gain ownership of the Global Lock.
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*
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* MUTEX: Interpreter must be locked
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*
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* Note: The original implementation allowed multiple threads to "acquire" the
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* Global Lock, and the OS would hold the lock until the last thread had
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* released it. However, this could potentially starve the BIOS out of the
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* lock, especially in the case where there is a tight handshake between the
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* Embedded Controller driver and the BIOS. Therefore, this implementation
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* allows only one thread to acquire the HW Global Lock at a time, and makes
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* the global lock appear as a standard mutex on the OS side.
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*
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*****************************************************************************/
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ACPI_STATUS
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AcpiEvAcquireGlobalLock (
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UINT16 Timeout)
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{
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ACPI_CPU_FLAGS Flags;
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ACPI_STATUS Status;
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BOOLEAN Acquired = FALSE;
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ACPI_FUNCTION_TRACE (EvAcquireGlobalLock);
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/*
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* Only one thread can acquire the GL at a time, the GlobalLockMutex
|
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* enforces this. This interface releases the interpreter if we must wait.
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*/
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Status = AcpiExSystemWaitMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex,
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Timeout);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
|
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|
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/*
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* Update the global lock handle and check for wraparound. The handle is
|
||||
* only used for the external global lock interfaces, but it is updated
|
||||
* here to properly handle the case where a single thread may acquire the
|
||||
* lock via both the AML and the AcpiAcquireGlobalLock interfaces. The
|
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* handle is therefore updated on the first acquire from a given thread
|
||||
* regardless of where the acquisition request originated.
|
||||
*/
|
||||
AcpiGbl_GlobalLockHandle++;
|
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if (AcpiGbl_GlobalLockHandle == 0)
|
||||
{
|
||||
AcpiGbl_GlobalLockHandle = 1;
|
||||
}
|
||||
|
||||
/*
|
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* Make sure that a global lock actually exists. If not, just
|
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* treat the lock as a standard mutex.
|
||||
*/
|
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if (!AcpiGbl_GlobalLockPresent)
|
||||
{
|
||||
AcpiGbl_GlobalLockAcquired = TRUE;
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return_ACPI_STATUS (AE_OK);
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}
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Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
|
||||
|
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do
|
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{
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/* Attempt to acquire the actual hardware lock */
|
||||
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ACPI_ACQUIRE_GLOBAL_LOCK (AcpiGbl_FACS, Acquired);
|
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if (Acquired)
|
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{
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AcpiGbl_GlobalLockAcquired = TRUE;
|
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
||||
"Acquired hardware Global Lock\n"));
|
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break;
|
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}
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|
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/*
|
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* Did not get the lock. The pending bit was set above, and
|
||||
* we must now wait until we receive the global lock
|
||||
* released interrupt.
|
||||
*/
|
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AcpiGbl_GlobalLockPending = TRUE;
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AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
|
||||
|
||||
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
||||
"Waiting for hardware Global Lock\n"));
|
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|
||||
/*
|
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* Wait for handshake with the global lock interrupt handler.
|
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* This interface releases the interpreter if we must wait.
|
||||
*/
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||||
Status = AcpiExSystemWaitSemaphore (AcpiGbl_GlobalLockSemaphore,
|
||||
ACPI_WAIT_FOREVER);
|
||||
|
||||
Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
|
||||
|
||||
} while (ACPI_SUCCESS (Status));
|
||||
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AcpiGbl_GlobalLockPending = FALSE;
|
||||
AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
|
||||
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvReleaseGlobalLock
|
||||
*
|
||||
* PARAMETERS: None
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Releases ownership of the Global Lock.
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvReleaseGlobalLock (
|
||||
void)
|
||||
{
|
||||
BOOLEAN Pending = FALSE;
|
||||
ACPI_STATUS Status = AE_OK;
|
||||
|
||||
|
||||
ACPI_FUNCTION_TRACE (EvReleaseGlobalLock);
|
||||
|
||||
|
||||
/* Lock must be already acquired */
|
||||
|
||||
if (!AcpiGbl_GlobalLockAcquired)
|
||||
{
|
||||
ACPI_WARNING ((AE_INFO,
|
||||
"Cannot release the ACPI Global Lock, it has not been acquired"));
|
||||
return_ACPI_STATUS (AE_NOT_ACQUIRED);
|
||||
}
|
||||
|
||||
if (AcpiGbl_GlobalLockPresent)
|
||||
{
|
||||
/* Allow any thread to release the lock */
|
||||
|
||||
ACPI_RELEASE_GLOBAL_LOCK (AcpiGbl_FACS, Pending);
|
||||
|
||||
/*
|
||||
* If the pending bit was set, we must write GBL_RLS to the control
|
||||
* register
|
||||
*/
|
||||
if (Pending)
|
||||
{
|
||||
Status = AcpiWriteBitRegister (
|
||||
ACPI_BITREG_GLOBAL_LOCK_RELEASE, ACPI_ENABLE_EVENT);
|
||||
}
|
||||
|
||||
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Released hardware Global Lock\n"));
|
||||
}
|
||||
|
||||
AcpiGbl_GlobalLockAcquired = FALSE;
|
||||
|
||||
/* Release the local GL mutex */
|
||||
|
||||
AcpiOsReleaseMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex);
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
@ -117,7 +117,6 @@
|
||||
#include "accommon.h"
|
||||
#include "acevents.h"
|
||||
#include "acnamesp.h"
|
||||
#include "acinterp.h"
|
||||
|
||||
#define _COMPONENT ACPI_EVENTS
|
||||
ACPI_MODULE_NAME ("evmisc")
|
||||
@ -129,14 +128,6 @@ static void ACPI_SYSTEM_XFACE
|
||||
AcpiEvNotifyDispatch (
|
||||
void *Context);
|
||||
|
||||
static UINT32
|
||||
AcpiEvGlobalLockHandler (
|
||||
void *Context);
|
||||
|
||||
static ACPI_STATUS
|
||||
AcpiEvRemoveGlobalLockHandler (
|
||||
void);
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
@ -372,316 +363,6 @@ AcpiEvNotifyDispatch (
|
||||
}
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvGlobalLockHandler
|
||||
*
|
||||
* PARAMETERS: Context - From thread interface, not used
|
||||
*
|
||||
* RETURN: ACPI_INTERRUPT_HANDLED
|
||||
*
|
||||
* DESCRIPTION: Invoked directly from the SCI handler when a global lock
|
||||
* release interrupt occurs. If there is actually a pending
|
||||
* request for the lock, signal the waiting thread.
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
static UINT32
|
||||
AcpiEvGlobalLockHandler (
|
||||
void *Context)
|
||||
{
|
||||
ACPI_STATUS Status;
|
||||
ACPI_CPU_FLAGS Flags;
|
||||
|
||||
|
||||
Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
|
||||
|
||||
/*
|
||||
* If a request for the global lock is not actually pending,
|
||||
* we are done. This handles "spurious" global lock interrupts
|
||||
* which are possible (and have been seen) with bad BIOSs.
|
||||
*/
|
||||
if (!AcpiGbl_GlobalLockPending)
|
||||
{
|
||||
goto CleanupAndExit;
|
||||
}
|
||||
|
||||
/*
|
||||
* Send a unit to the global lock semaphore. The actual acquisition
|
||||
* of the global lock will be performed by the waiting thread.
|
||||
*/
|
||||
Status = AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, 1);
|
||||
if (ACPI_FAILURE (Status))
|
||||
{
|
||||
ACPI_ERROR ((AE_INFO, "Could not signal Global Lock semaphore"));
|
||||
}
|
||||
|
||||
AcpiGbl_GlobalLockPending = FALSE;
|
||||
|
||||
|
||||
CleanupAndExit:
|
||||
|
||||
AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
|
||||
return (ACPI_INTERRUPT_HANDLED);
|
||||
}
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvInitGlobalLockHandler
|
||||
*
|
||||
* PARAMETERS: None
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Install a handler for the global lock release event
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvInitGlobalLockHandler (
|
||||
void)
|
||||
{
|
||||
ACPI_STATUS Status;
|
||||
|
||||
|
||||
ACPI_FUNCTION_TRACE (EvInitGlobalLockHandler);
|
||||
|
||||
|
||||
/* Attempt installation of the global lock handler */
|
||||
|
||||
Status = AcpiInstallFixedEventHandler (ACPI_EVENT_GLOBAL,
|
||||
AcpiEvGlobalLockHandler, NULL);
|
||||
|
||||
/*
|
||||
* If the global lock does not exist on this platform, the attempt to
|
||||
* enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick).
|
||||
* Map to AE_OK, but mark global lock as not present. Any attempt to
|
||||
* actually use the global lock will be flagged with an error.
|
||||
*/
|
||||
AcpiGbl_GlobalLockPresent = FALSE;
|
||||
if (Status == AE_NO_HARDWARE_RESPONSE)
|
||||
{
|
||||
ACPI_ERROR ((AE_INFO,
|
||||
"No response from Global Lock hardware, disabling lock"));
|
||||
|
||||
return_ACPI_STATUS (AE_OK);
|
||||
}
|
||||
|
||||
Status = AcpiOsCreateLock (&AcpiGbl_GlobalLockPendingLock);
|
||||
if (ACPI_FAILURE (Status))
|
||||
{
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
AcpiGbl_GlobalLockPending = FALSE;
|
||||
AcpiGbl_GlobalLockPresent = TRUE;
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvRemoveGlobalLockHandler
|
||||
*
|
||||
* PARAMETERS: None
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Remove the handler for the Global Lock
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
static ACPI_STATUS
|
||||
AcpiEvRemoveGlobalLockHandler (
|
||||
void)
|
||||
{
|
||||
ACPI_STATUS Status;
|
||||
|
||||
|
||||
ACPI_FUNCTION_TRACE (EvRemoveGlobalLockHandler);
|
||||
|
||||
AcpiGbl_GlobalLockPresent = FALSE;
|
||||
Status = AcpiRemoveFixedEventHandler (ACPI_EVENT_GLOBAL,
|
||||
AcpiEvGlobalLockHandler);
|
||||
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
|
||||
/******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvAcquireGlobalLock
|
||||
*
|
||||
* PARAMETERS: Timeout - Max time to wait for the lock, in millisec.
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Attempt to gain ownership of the Global Lock.
|
||||
*
|
||||
* MUTEX: Interpreter must be locked
|
||||
*
|
||||
* Note: The original implementation allowed multiple threads to "acquire" the
|
||||
* Global Lock, and the OS would hold the lock until the last thread had
|
||||
* released it. However, this could potentially starve the BIOS out of the
|
||||
* lock, especially in the case where there is a tight handshake between the
|
||||
* Embedded Controller driver and the BIOS. Therefore, this implementation
|
||||
* allows only one thread to acquire the HW Global Lock at a time, and makes
|
||||
* the global lock appear as a standard mutex on the OS side.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvAcquireGlobalLock (
|
||||
UINT16 Timeout)
|
||||
{
|
||||
ACPI_CPU_FLAGS Flags;
|
||||
ACPI_STATUS Status;
|
||||
BOOLEAN Acquired = FALSE;
|
||||
|
||||
|
||||
ACPI_FUNCTION_TRACE (EvAcquireGlobalLock);
|
||||
|
||||
|
||||
/*
|
||||
* Only one thread can acquire the GL at a time, the GlobalLockMutex
|
||||
* enforces this. This interface releases the interpreter if we must wait.
|
||||
*/
|
||||
Status = AcpiExSystemWaitMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex,
|
||||
Timeout);
|
||||
if (ACPI_FAILURE (Status))
|
||||
{
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
/*
|
||||
* Update the global lock handle and check for wraparound. The handle is
|
||||
* only used for the external global lock interfaces, but it is updated
|
||||
* here to properly handle the case where a single thread may acquire the
|
||||
* lock via both the AML and the AcpiAcquireGlobalLock interfaces. The
|
||||
* handle is therefore updated on the first acquire from a given thread
|
||||
* regardless of where the acquisition request originated.
|
||||
*/
|
||||
AcpiGbl_GlobalLockHandle++;
|
||||
if (AcpiGbl_GlobalLockHandle == 0)
|
||||
{
|
||||
AcpiGbl_GlobalLockHandle = 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Make sure that a global lock actually exists. If not, just
|
||||
* treat the lock as a standard mutex.
|
||||
*/
|
||||
if (!AcpiGbl_GlobalLockPresent)
|
||||
{
|
||||
AcpiGbl_GlobalLockAcquired = TRUE;
|
||||
return_ACPI_STATUS (AE_OK);
|
||||
}
|
||||
|
||||
Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
|
||||
|
||||
do
|
||||
{
|
||||
/* Attempt to acquire the actual hardware lock */
|
||||
|
||||
ACPI_ACQUIRE_GLOBAL_LOCK (AcpiGbl_FACS, Acquired);
|
||||
if (Acquired)
|
||||
{
|
||||
AcpiGbl_GlobalLockAcquired = TRUE;
|
||||
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
||||
"Acquired hardware Global Lock\n"));
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Did not get the lock. The pending bit was set above, and
|
||||
* we must now wait until we receive the global lock
|
||||
* released interrupt.
|
||||
*/
|
||||
AcpiGbl_GlobalLockPending = TRUE;
|
||||
AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
|
||||
|
||||
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
||||
"Waiting for hardware Global Lock\n"));
|
||||
|
||||
/*
|
||||
* Wait for handshake with the global lock interrupt handler.
|
||||
* This interface releases the interpreter if we must wait.
|
||||
*/
|
||||
Status = AcpiExSystemWaitSemaphore (AcpiGbl_GlobalLockSemaphore,
|
||||
ACPI_WAIT_FOREVER);
|
||||
|
||||
Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
|
||||
|
||||
} while (ACPI_SUCCESS (Status));
|
||||
|
||||
AcpiGbl_GlobalLockPending = FALSE;
|
||||
AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
|
||||
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvReleaseGlobalLock
|
||||
*
|
||||
* PARAMETERS: None
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Releases ownership of the Global Lock.
|
||||
*
|
||||
******************************************************************************/
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvReleaseGlobalLock (
|
||||
void)
|
||||
{
|
||||
BOOLEAN Pending = FALSE;
|
||||
ACPI_STATUS Status = AE_OK;
|
||||
|
||||
|
||||
ACPI_FUNCTION_TRACE (EvReleaseGlobalLock);
|
||||
|
||||
|
||||
/* Lock must be already acquired */
|
||||
|
||||
if (!AcpiGbl_GlobalLockAcquired)
|
||||
{
|
||||
ACPI_WARNING ((AE_INFO,
|
||||
"Cannot release the ACPI Global Lock, it has not been acquired"));
|
||||
return_ACPI_STATUS (AE_NOT_ACQUIRED);
|
||||
}
|
||||
|
||||
if (AcpiGbl_GlobalLockPresent)
|
||||
{
|
||||
/* Allow any thread to release the lock */
|
||||
|
||||
ACPI_RELEASE_GLOBAL_LOCK (AcpiGbl_FACS, Pending);
|
||||
|
||||
/*
|
||||
* If the pending bit was set, we must write GBL_RLS to the control
|
||||
* register
|
||||
*/
|
||||
if (Pending)
|
||||
{
|
||||
Status = AcpiWriteBitRegister (
|
||||
ACPI_BITREG_GLOBAL_LOCK_RELEASE, ACPI_ENABLE_EVENT);
|
||||
}
|
||||
|
||||
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Released hardware Global Lock\n"));
|
||||
}
|
||||
|
||||
AcpiGbl_GlobalLockAcquired = FALSE;
|
||||
|
||||
/* Release the local GL mutex */
|
||||
|
||||
AcpiOsReleaseMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex);
|
||||
return_ACPI_STATUS (Status);
|
||||
}
|
||||
|
||||
|
||||
/******************************************************************************
|
||||
*
|
||||
* FUNCTION: AcpiEvTerminate
|
||||
@ -761,4 +442,3 @@ AcpiEvTerminate (
|
||||
}
|
||||
return_VOID;
|
||||
}
|
||||
|
||||
|
@ -140,6 +140,23 @@ BOOLEAN
|
||||
AcpiEvIsNotifyObject (
|
||||
ACPI_NAMESPACE_NODE *Node);
|
||||
|
||||
UINT32
|
||||
AcpiEvGetGpeNumberIndex (
|
||||
UINT32 GpeNumber);
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvQueueNotifyRequest (
|
||||
ACPI_NAMESPACE_NODE *Node,
|
||||
UINT32 NotifyValue);
|
||||
|
||||
|
||||
/*
|
||||
* evglock - Global Lock support
|
||||
*/
|
||||
ACPI_STATUS
|
||||
AcpiEvInitGlobalLockHandler (
|
||||
void);
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvAcquireGlobalLock(
|
||||
UINT16 Timeout);
|
||||
@ -149,18 +166,9 @@ AcpiEvReleaseGlobalLock(
|
||||
void);
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvInitGlobalLockHandler (
|
||||
AcpiEvRemoveGlobalLockHandler (
|
||||
void);
|
||||
|
||||
UINT32
|
||||
AcpiEvGetGpeNumberIndex (
|
||||
UINT32 GpeNumber);
|
||||
|
||||
ACPI_STATUS
|
||||
AcpiEvQueueNotifyRequest (
|
||||
ACPI_NAMESPACE_NODE *Node,
|
||||
UINT32 NotifyValue);
|
||||
|
||||
|
||||
/*
|
||||
* evgpe - Low-level GPE support
|
||||
|
Loading…
Reference in New Issue
Block a user