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480 lines
17 KiB
C
480 lines
17 KiB
C
/******************************************************************************
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*
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* Module Name: evgpe - General Purpose Event handling and dispatch
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* $Revision: 12 $
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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 - 2003, 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 "acevents.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evgpe")
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGetGpeEventInfo
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*
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* PARAMETERS: GpeNumber - Raw GPE number
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*
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* RETURN: None.
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*
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* DESCRIPTION: Returns the EventInfo struct
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* associated with this GPE.
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*
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* TBD: this function will go away when full support of GPE block devices
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* is implemented!
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*
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******************************************************************************/
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ACPI_GPE_EVENT_INFO *
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AcpiEvGetGpeEventInfo (
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UINT32 GpeNumber)
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{
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ACPI_GPE_BLOCK_INFO *GpeBlock;
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/* Examine GPE Block 0 */
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GpeBlock = AcpiGbl_GpeBlockListHead;
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if (!GpeBlock)
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{
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return (NULL);
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}
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if ((GpeNumber >= GpeBlock->BlockBaseNumber) &&
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(GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))
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{
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return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]);
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}
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/* Examine GPE Block 1 */
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GpeBlock = GpeBlock->Next;
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if (!GpeBlock)
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{
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return (NULL);
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}
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if ((GpeNumber >= GpeBlock->BlockBaseNumber) &&
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(GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8)))
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{
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return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]);
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}
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return (NULL);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGpeDetect
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*
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* PARAMETERS: None
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Detect if any GP events have occurred. This function is
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* executed at interrupt level.
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*
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******************************************************************************/
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UINT32
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AcpiEvGpeDetect (void)
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{
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UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
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UINT32 i;
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UINT32 j;
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UINT8 EnabledStatusByte;
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UINT8 BitMask;
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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UINT32 InValue;
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ACPI_STATUS Status;
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ACPI_GPE_BLOCK_INFO *GpeBlock;
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ACPI_FUNCTION_NAME ("EvGpeDetect");
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/* Examine all GPE blocks attached to this interrupt level */
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GpeBlock = AcpiGbl_GpeBlockListHead;
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while (GpeBlock)
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{
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/*
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* Read all of the 8-bit GPE status and enable registers
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* in this GPE block, saving all of them.
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* Find all currently active GP events.
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*/
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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/* Get the next status/enable pair */
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GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
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Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue,
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&GpeRegisterInfo->StatusAddress, 0);
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GpeRegisterInfo->Status = (UINT8) InValue;
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if (ACPI_FAILURE (Status))
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{
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return (ACPI_INTERRUPT_NOT_HANDLED);
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}
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Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &InValue,
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&GpeRegisterInfo->EnableAddress, 0);
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GpeRegisterInfo->Enable = (UINT8) InValue;
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if (ACPI_FAILURE (Status))
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{
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return (ACPI_INTERRUPT_NOT_HANDLED);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
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"GPE block at %8.8X%8.8X - Values: Enable %02X Status %02X\n",
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ACPI_HIDWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)),
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ACPI_LODWORD (ACPI_GET_ADDRESS (GpeRegisterInfo->EnableAddress.Address)),
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GpeRegisterInfo->Enable,
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GpeRegisterInfo->Status));
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/* First check if there is anything active at all in this register */
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EnabledStatusByte = (UINT8) (GpeRegisterInfo->Status &
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GpeRegisterInfo->Enable);
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if (!EnabledStatusByte)
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{
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/* No active GPEs in this register, move on */
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continue;
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}
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/* Now look at the individual GPEs in this byte register */
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for (j = 0, BitMask = 1; j < ACPI_GPE_REGISTER_WIDTH; j++, BitMask <<= 1)
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{
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/* Examine one GPE bit */
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if (EnabledStatusByte & BitMask)
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{
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/*
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* Found an active GPE. Dispatch the event to a handler
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* or method.
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*/
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IntStatus |= AcpiEvGpeDispatch (
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&GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) +j]);
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}
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}
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}
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GpeBlock = GpeBlock->Next;
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}
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return (IntStatus);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvAsynchExecuteGpeMethod
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*
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* PARAMETERS: GpeEventInfo - Info for this GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Perform the actual execution of a GPE control method. This
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* function is called from an invocation of AcpiOsQueueForExecution
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* (and therefore does NOT execute at interrupt level) so that
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* the control method itself is not executed in the context of
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* the SCI interrupt handler.
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*
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******************************************************************************/
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static void ACPI_SYSTEM_XFACE
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AcpiEvAsynchExecuteGpeMethod (
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void *Context)
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{
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ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context;
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UINT32 GpeNumber = 0;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod");
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/*
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* Take a snapshot of the GPE info for this level - we copy the
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* info to prevent a race condition with RemoveHandler.
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*/
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Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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if (GpeEventInfo->MethodNode)
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{
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/*
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* Invoke the GPE Method (_Lxx, _Exx):
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* (Evaluate the _Lxx/_Exx control method that corresponds to this GPE.)
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*/
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Status = AcpiNsEvaluateByHandle (GpeEventInfo->MethodNode, NULL, NULL);
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if (ACPI_FAILURE (Status))
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{
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ACPI_REPORT_ERROR (("%s while evaluating method [%4.4s] for GPE[%2.2X]\n",
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AcpiFormatException (Status),
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GpeEventInfo->MethodNode->Name.Ascii, GpeNumber));
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}
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}
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if (GpeEventInfo->Type & ACPI_EVENT_LEVEL_TRIGGERED)
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{
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/*
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* GPE is level-triggered, we clear the GPE status bit after handling
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* the event.
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*/
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Status = AcpiHwClearGpe (GpeEventInfo);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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}
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/* Enable this GPE */
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(void) AcpiHwEnableGpe (GpeEventInfo);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGpeDispatch
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*
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* PARAMETERS: GpeEventInfo - info for this GPE
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
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* or method (e.g. _Lxx/_Exx) handler. This function executes
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* at interrupt level.
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*
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******************************************************************************/
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UINT32
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AcpiEvGpeDispatch (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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UINT32 GpeNumber = 0; /* TBD: remove */
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("EvGpeDispatch");
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/*
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* If edge-triggered, clear the GPE status bit now. Note that
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* level-triggered events are cleared after the GPE is serviced.
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*/
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if (GpeEventInfo->Type & ACPI_EVENT_EDGE_TRIGGERED)
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{
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Status = AcpiHwClearGpe (GpeEventInfo);
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if (ACPI_FAILURE (Status))
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{
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ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2.2X]\n",
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GpeNumber));
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return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
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}
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}
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/*
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* Dispatch the GPE to either an installed handler, or the control
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* method associated with this GPE (_Lxx or _Exx).
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* If a handler exists, we invoke it and do not attempt to run the method.
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* If there is neither a handler nor a method, we disable the level to
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* prevent further events from coming in here.
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*/
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if (GpeEventInfo->Handler)
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{
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/* Invoke the installed handler (at interrupt level) */
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GpeEventInfo->Handler (GpeEventInfo->Context);
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}
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else if (GpeEventInfo->MethodNode)
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{
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/*
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* Disable GPE, so it doesn't keep firing before the method has a
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* chance to run.
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*/
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Status = AcpiHwDisableGpe (GpeEventInfo);
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if (ACPI_FAILURE (Status))
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{
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ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%2.2X]\n",
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GpeNumber));
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return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
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}
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/*
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* Execute the method associated with the GPE.
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*/
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if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE,
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AcpiEvAsynchExecuteGpeMethod,
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GpeEventInfo)))
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{
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ACPI_REPORT_ERROR ((
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"AcpiEvGpeDispatch: Unable to queue handler for GPE[%2.2X], event is disabled\n",
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GpeNumber));
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}
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}
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else
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{
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/* No handler or method to run! */
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ACPI_REPORT_ERROR ((
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"AcpiEvGpeDispatch: No handler or method for GPE[%2.2X], disabling event\n",
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GpeNumber));
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/*
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* Disable the GPE. The GPE will remain disabled until the ACPI
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* Core Subsystem is restarted, or the handler is reinstalled.
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*/
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Status = AcpiHwDisableGpe (GpeEventInfo);
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if (ACPI_FAILURE (Status))
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{
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ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to disable GPE[%2.2X]\n",
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GpeNumber));
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return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
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}
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}
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/*
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* It is now safe to clear level-triggered evnets.
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*/
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if (GpeEventInfo->Type & ACPI_EVENT_LEVEL_TRIGGERED)
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{
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Status = AcpiHwClearGpe (GpeEventInfo);
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if (ACPI_FAILURE (Status))
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{
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ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2.2X]\n",
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GpeNumber));
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return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
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}
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}
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return_VALUE (ACPI_INTERRUPT_HANDLED);
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}
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