955 lines
30 KiB
C
955 lines
30 KiB
C
/******************************************************************************
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*
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* Module Name: evevent - Fixed and General Purpose AcpiEvent
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* handling and dispatch
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* $Revision: 34 $
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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, 2000, 2001, 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 "achware.h"
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#include "acevents.h"
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#include "acnamesp.h"
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#include "accommon.h"
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#define _COMPONENT EVENT_HANDLING
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MODULE_NAME ("evevent")
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/**************************************************************************
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*
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* FUNCTION: AcpiEvInitialize
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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: Ensures that the system control interrupt (SCI) is properly
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* configured, disables SCI event sources, installs the SCI
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* handler
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*
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*************************************************************************/
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ACPI_STATUS
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AcpiEvInitialize (
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void)
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{
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ACPI_STATUS Status;
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FUNCTION_TRACE ("EvInitialize");
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/* Make sure we have ACPI tables */
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if (!AcpiGbl_DSDT)
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{
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DEBUG_PRINT (ACPI_WARN, ("EvInitialize: No ACPI tables present!\n"));
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return_ACPI_STATUS (AE_NO_ACPI_TABLES);
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}
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/* Make sure the BIOS supports ACPI mode */
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if (SYS_MODE_LEGACY == AcpiHwGetModeCapabilities())
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{
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DEBUG_PRINT (ACPI_WARN,
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("EvInitialize: Only legacy mode supported!\n"));
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return_ACPI_STATUS (AE_ERROR);
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}
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AcpiGbl_OriginalMode = AcpiHwGetMode();
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/*
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* Initialize the Fixed and General Purpose AcpiEvents prior. This is
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* done prior to enabling SCIs to prevent interrupts from occuring
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* before handers are installed.
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*/
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Status = AcpiEvFixedEventInitialize ();
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if (ACPI_FAILURE (Status))
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{
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DEBUG_PRINT (ACPI_FATAL,
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("EvInitialize: Unable to initialize fixed events.\n"));
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return_ACPI_STATUS (Status);
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}
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Status = AcpiEvGpeInitialize ();
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if (ACPI_FAILURE (Status))
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{
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DEBUG_PRINT (ACPI_FATAL,
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("EvInitialize: Unable to initialize general purpose events.\n"));
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return_ACPI_STATUS (Status);
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}
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/* Install the SCI handler */
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Status = AcpiEvInstallSciHandler ();
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if (ACPI_FAILURE (Status))
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{
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DEBUG_PRINT (ACPI_FATAL,
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("EvInitialize: Unable to install System Control Interrupt Handler\n"));
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return_ACPI_STATUS (Status);
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}
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/* Install handlers for control method GPE handlers (_Lxx, _Exx) */
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Status = AcpiEvInitGpeControlMethods ();
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if (ACPI_FAILURE (Status))
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{
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DEBUG_PRINT (ACPI_FATAL,
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("EvInitialize: Unable to initialize Gpe control methods\n"));
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return_ACPI_STATUS (Status);
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}
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/* Install the handler for the Global Lock */
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Status = AcpiEvInitGlobalLockHandler ();
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if (ACPI_FAILURE (Status))
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{
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DEBUG_PRINT (ACPI_FATAL,
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("EvInitialize: Unable to initialize Global Lock handler\n"));
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return_ACPI_STATUS (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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* FUNCTION: AcpiEvFixedEventInitialize
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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: Initialize the Fixed AcpiEvent data structures
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvFixedEventInitialize(void)
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{
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int i = 0;
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/* Initialize the structure that keeps track of fixed event handlers */
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for (i = 0; i < NUM_FIXED_EVENTS; i++)
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{
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AcpiGbl_FixedEventHandlers[i].Handler = NULL;
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AcpiGbl_FixedEventHandlers[i].Context = NULL;
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}
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, TMR_EN, 0);
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, GBL_EN, 0);
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, PWRBTN_EN, 0);
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, SLPBTN_EN, 0);
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_LOCK, RTC_EN, 0);
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiEvFixedEventDetect
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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: Checks the PM status register for fixed events
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*
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******************************************************************************/
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UINT32
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AcpiEvFixedEventDetect(void)
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{
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UINT32 IntStatus = INTERRUPT_NOT_HANDLED;
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UINT32 StatusRegister;
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UINT32 EnableRegister;
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/*
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* Read the fixed feature status and enable registers, as all the cases
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* depend on their values.
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*/
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StatusRegister = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, PM1_STS);
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EnableRegister = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK, PM1_EN);
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DEBUG_PRINT (TRACE_INTERRUPTS,
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("Fixed AcpiEvent Block: Enable = %08x\tStatus = %08x\n",
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EnableRegister, StatusRegister));
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/* power management timer roll over */
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if ((StatusRegister & ACPI_STATUS_PMTIMER) &&
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(EnableRegister & ACPI_ENABLE_PMTIMER))
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{
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IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_PMTIMER);
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}
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/* global event (BIOS want's the global lock) */
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if ((StatusRegister & ACPI_STATUS_GLOBAL) &&
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(EnableRegister & ACPI_ENABLE_GLOBAL))
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{
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IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_GLOBAL);
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}
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/* power button event */
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if ((StatusRegister & ACPI_STATUS_POWER_BUTTON) &&
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(EnableRegister & ACPI_ENABLE_POWER_BUTTON))
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{
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IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_POWER_BUTTON);
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}
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/* sleep button event */
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if ((StatusRegister & ACPI_STATUS_SLEEP_BUTTON) &&
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(EnableRegister & ACPI_ENABLE_SLEEP_BUTTON))
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{
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IntStatus |= AcpiEvFixedEventDispatch (ACPI_EVENT_SLEEP_BUTTON);
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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: AcpiEvFixedEventDispatch
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*
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* PARAMETERS: Event - Event type
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Clears the status bit for the requested event, calls the
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* handler that previously registered for the event.
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*
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******************************************************************************/
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UINT32
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AcpiEvFixedEventDispatch (
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UINT32 Event)
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{
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UINT32 RegisterId;
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/* Clear the status bit */
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switch (Event)
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{
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case ACPI_EVENT_PMTIMER:
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RegisterId = TMR_STS;
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break;
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case ACPI_EVENT_GLOBAL:
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RegisterId = GBL_STS;
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break;
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case ACPI_EVENT_POWER_BUTTON:
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RegisterId = PWRBTN_STS;
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break;
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case ACPI_EVENT_SLEEP_BUTTON:
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RegisterId = SLPBTN_STS;
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break;
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case ACPI_EVENT_RTC:
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RegisterId = RTC_STS;
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break;
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default:
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return 0;
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break;
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}
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK, RegisterId, 1);
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/*
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* Make sure we've got a handler. If not, report an error.
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* The event is disabled to prevent further interrupts.
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*/
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if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
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{
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RegisterId = (PM1_EN | REGISTER_BIT_ID(RegisterId));
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AcpiHwRegisterBitAccess (ACPI_WRITE, ACPI_MTX_DO_NOT_LOCK,
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RegisterId, 0);
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REPORT_ERROR (
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("EvGpeDispatch: No installed handler for fixed event [%08X]\n",
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Event));
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return (INTERRUPT_NOT_HANDLED);
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}
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/* Invoke the handler */
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return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
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AcpiGbl_FixedEventHandlers[Event].Context));
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiEvGpeInitialize
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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: Initialize the GPE data structures
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvGpeInitialize (void)
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{
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UINT32 i;
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UINT32 j;
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UINT32 RegisterIndex;
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UINT32 GpeNumber;
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UINT16 Gpe0RegisterCount;
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UINT16 Gpe1RegisterCount;
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FUNCTION_TRACE ("EvGpeInitialize");
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/*
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* Set up various GPE counts
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*
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* You may ask,why are the GPE register block lengths divided by 2?
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* From the ACPI 2.0 Spec, section, 4.7.1.6 General-Purpose Event
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* Registers, we have,
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*
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* "Each register block contains two registers of equal length
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* GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
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* GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
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* The length of the GPE1_STS and GPE1_EN registers is equal to
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* half the GPE1_LEN. If a generic register block is not supported
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* then its respective block pointer and block length values in the
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* FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
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* to be the same size."
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*/
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Gpe0RegisterCount = (UINT16) DIV_2 (AcpiGbl_FADT->Gpe0BlkLen);
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Gpe1RegisterCount = (UINT16) DIV_2 (AcpiGbl_FADT->Gpe1BlkLen);
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AcpiGbl_GpeRegisterCount = Gpe0RegisterCount + Gpe1RegisterCount;
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if (!AcpiGbl_GpeRegisterCount)
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{
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REPORT_WARNING (("Zero GPEs are defined in the FADT\n"));
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Allocate the Gpe information block
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*/
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AcpiGbl_GpeRegisters = AcpiCmCallocate (AcpiGbl_GpeRegisterCount *
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sizeof (ACPI_GPE_REGISTERS));
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if (!AcpiGbl_GpeRegisters)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("Could not allocate the GpeRegisters block\n"));
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* Allocate the Gpe dispatch handler block
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* There are eight distinct GP events per register.
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* Initialization to zeros is sufficient
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*/
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AcpiGbl_GpeInfo = AcpiCmCallocate (MUL_8 (AcpiGbl_GpeRegisterCount) *
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sizeof (ACPI_GPE_LEVEL_INFO));
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if (!AcpiGbl_GpeInfo)
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{
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AcpiCmFree (AcpiGbl_GpeRegisters);
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DEBUG_PRINT (ACPI_ERROR, ("Could not allocate the GpeInfo block\n"));
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Set the Gpe validation table to GPE_INVALID */
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MEMSET (AcpiGbl_GpeValid, (int) ACPI_GPE_INVALID, NUM_GPE);
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/*
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* Initialize the Gpe information and validation blocks. A goal of these
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* blocks is to hide the fact that there are two separate GPE register sets
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* In a given block, the status registers occupy the first half, and
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* the enable registers occupy the second half.
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*/
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/* GPE Block 0 */
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RegisterIndex = 0;
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for (i = 0; i < Gpe0RegisterCount; i++)
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{
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AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr =
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(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) + i);
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AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr =
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(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) + i + Gpe0RegisterCount);
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AcpiGbl_GpeRegisters[RegisterIndex].GpeBase = (UINT8) MUL_8 (i);
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for (j = 0; j < 8; j++)
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{
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GpeNumber = AcpiGbl_GpeRegisters[RegisterIndex].GpeBase + j;
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AcpiGbl_GpeValid[GpeNumber] = (UINT8) RegisterIndex;
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}
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/*
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* Clear the status/enable registers. Note that status registers
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* are cleared by writing a '1', while enable registers are cleared
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* by writing a '0'.
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*/
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AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 0x00);
|
|
AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, 0xFF);
|
|
|
|
RegisterIndex++;
|
|
}
|
|
|
|
/* GPE Block 1 */
|
|
|
|
for (i = 0; i < Gpe1RegisterCount; i++)
|
|
{
|
|
AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr =
|
|
(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) + i);
|
|
|
|
AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr =
|
|
(UINT16) (ACPI_GET_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) + i + Gpe1RegisterCount);
|
|
|
|
AcpiGbl_GpeRegisters[RegisterIndex].GpeBase =
|
|
(UINT8) (AcpiGbl_FADT->Gpe1Base + MUL_8 (i));
|
|
|
|
for (j = 0; j < 8; j++)
|
|
{
|
|
GpeNumber = AcpiGbl_GpeRegisters[RegisterIndex].GpeBase + j;
|
|
AcpiGbl_GpeValid[GpeNumber] = (UINT8) RegisterIndex;
|
|
}
|
|
|
|
/*
|
|
* Clear the status/enable registers. Note that status registers
|
|
* are cleared by writing a '1', while enable registers are cleared
|
|
* by writing a '0'.
|
|
*/
|
|
AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].EnableAddr, 0x00);
|
|
AcpiOsOut8 (AcpiGbl_GpeRegisters[RegisterIndex].StatusAddr, 0xFF);
|
|
|
|
RegisterIndex++;
|
|
}
|
|
|
|
DEBUG_PRINT (ACPI_INFO,
|
|
("GPE registers: %X@%p (Blk0) %X@%p (Blk1)\n",
|
|
Gpe0RegisterCount, AcpiGbl_FADT->XGpe0Blk.Address, Gpe1RegisterCount,
|
|
AcpiGbl_FADT->XGpe1Blk.Address));
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvSaveMethodInfo
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a
|
|
* control method under the _GPE portion of the namespace.
|
|
* Extract the name and GPE type from the object, saving this
|
|
* information for quick lookup during GPE dispatch
|
|
*
|
|
* The name of each GPE control method is of the form:
|
|
* "_Lnn" or "_Enn"
|
|
* Where:
|
|
* L - means that the GPE is level triggered
|
|
* E - means that the GPE is edge triggered
|
|
* nn - is the GPE number
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiEvSaveMethodInfo (
|
|
ACPI_HANDLE ObjHandle,
|
|
UINT32 Level,
|
|
void *ObjDesc,
|
|
void **ReturnValue)
|
|
{
|
|
UINT32 GpeNumber;
|
|
NATIVE_CHAR Name[ACPI_NAME_SIZE + 1];
|
|
UINT8 Type;
|
|
|
|
|
|
/* Extract the name from the object and convert to a string */
|
|
|
|
MOVE_UNALIGNED32_TO_32 (Name, &((ACPI_NAMESPACE_NODE *) ObjHandle)->Name);
|
|
Name[ACPI_NAME_SIZE] = 0;
|
|
|
|
/*
|
|
* Edge/Level determination is based on the 2nd INT8 of the method name
|
|
*/
|
|
if (Name[1] == 'L')
|
|
{
|
|
Type = ACPI_EVENT_LEVEL_TRIGGERED;
|
|
}
|
|
else if (Name[1] == 'E')
|
|
{
|
|
Type = ACPI_EVENT_EDGE_TRIGGERED;
|
|
}
|
|
else
|
|
{
|
|
/* Unknown method type, just ignore it! */
|
|
|
|
DEBUG_PRINT (ACPI_ERROR,
|
|
("EvSaveMethodInfo: Unknown GPE method type: %s (name not of form _Lnn or _Enn)\n",
|
|
Name));
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Convert the last two characters of the name to the Gpe Number */
|
|
|
|
GpeNumber = STRTOUL (&Name[2], NULL, 16);
|
|
if (GpeNumber == ACPI_UINT32_MAX)
|
|
{
|
|
/* Conversion failed; invalid method, just ignore it */
|
|
|
|
DEBUG_PRINT (ACPI_ERROR,
|
|
("EvSaveMethodInfo: Could not extract GPE number from name: %s (name not of form _Lnn or _Enn)\n",
|
|
Name));
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
if (AcpiGbl_GpeValid[GpeNumber] == ACPI_GPE_INVALID)
|
|
{
|
|
/* Not valid, all we can do here is ignore it */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Now we can add this information to the GpeInfo block
|
|
* for use during dispatch of this GPE.
|
|
*/
|
|
|
|
AcpiGbl_GpeInfo [GpeNumber].Type = Type;
|
|
AcpiGbl_GpeInfo [GpeNumber].MethodHandle = ObjHandle;
|
|
|
|
|
|
/*
|
|
* Enable the GPE (SCIs should be disabled at this point)
|
|
*/
|
|
|
|
AcpiHwEnableGpe (GpeNumber);
|
|
|
|
DEBUG_PRINT (ACPI_INFO,
|
|
("EvSaveMethodInfo: Registered GPE method %s as GPE number %X\n",
|
|
Name, GpeNumber));
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvInitGpeControlMethods
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Obtain the control methods associated with the GPEs.
|
|
*
|
|
* NOTE: Must be called AFTER namespace initialization!
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvInitGpeControlMethods (void)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
FUNCTION_TRACE ("EvInitGpeControlMethods");
|
|
|
|
|
|
/* Get a permanent handle to the _GPE object */
|
|
|
|
Status = AcpiGetHandle (NULL, "\\_GPE", &AcpiGbl_GpeObjHandle);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Traverse the namespace under \_GPE to find all methods there */
|
|
|
|
Status = AcpiWalkNamespace (ACPI_TYPE_METHOD, AcpiGbl_GpeObjHandle,
|
|
ACPI_UINT32_MAX, AcpiEvSaveMethodInfo,
|
|
NULL, NULL);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvGpeDetect
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Detect if any GP events have occurred
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiEvGpeDetect (void)
|
|
{
|
|
UINT32 IntStatus = INTERRUPT_NOT_HANDLED;
|
|
UINT32 i;
|
|
UINT32 j;
|
|
UINT8 EnabledStatusByte;
|
|
UINT8 BitMask;
|
|
|
|
|
|
/*
|
|
* Read all of the 8-bit GPE status and enable registers
|
|
* in both of the register blocks, saving all of it.
|
|
* Find all currently active GP events.
|
|
*/
|
|
|
|
for (i = 0; i < AcpiGbl_GpeRegisterCount; i++)
|
|
{
|
|
AcpiGbl_GpeRegisters[i].Status =
|
|
AcpiOsIn8 (AcpiGbl_GpeRegisters[i].StatusAddr);
|
|
|
|
AcpiGbl_GpeRegisters[i].Enable =
|
|
AcpiOsIn8 (AcpiGbl_GpeRegisters[i].EnableAddr);
|
|
|
|
DEBUG_PRINT (TRACE_INTERRUPTS,
|
|
("GPE block at %x - Enable: %08x\tStatus: %08x\n",
|
|
AcpiGbl_GpeRegisters[i].EnableAddr, AcpiGbl_GpeRegisters[i].Status, AcpiGbl_GpeRegisters[i].Enable));
|
|
|
|
/* First check if there is anything active at all in this register */
|
|
|
|
EnabledStatusByte = (UINT8) (AcpiGbl_GpeRegisters[i].Status &
|
|
AcpiGbl_GpeRegisters[i].Enable);
|
|
|
|
if (!EnabledStatusByte)
|
|
{
|
|
/* No active GPEs in this register, move on */
|
|
|
|
continue;
|
|
}
|
|
|
|
/* Now look at the individual GPEs in this byte register */
|
|
|
|
for (j = 0, BitMask = 1; j < 8; j++, BitMask <<= 1)
|
|
{
|
|
/* Examine one GPE bit */
|
|
|
|
if (EnabledStatusByte & BitMask)
|
|
{
|
|
/*
|
|
* Found an active GPE. Dispatch the event to a handler
|
|
* or method.
|
|
*/
|
|
IntStatus |=
|
|
AcpiEvGpeDispatch (AcpiGbl_GpeRegisters[i].GpeBase + j);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (IntStatus);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAsynchExecuteGpeMethod
|
|
*
|
|
* PARAMETERS: GpeNumber - The 0-based Gpe number
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Perform the actual execution of a GPE control method. This
|
|
* function is called from an invocation of AcpiOsQueueForExecution
|
|
* (and therefore does NOT execute at interrupt level) so that
|
|
* the control method itself is not executed in the context of
|
|
* the SCI interrupt handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiEvAsynchExecuteGpeMethod (
|
|
void *Context)
|
|
{
|
|
UINT32 GpeNumber = (UINT32) Context;
|
|
ACPI_GPE_LEVEL_INFO GpeInfo;
|
|
|
|
|
|
FUNCTION_TRACE ("EvAsynchExecuteGpeMethod");
|
|
|
|
/*
|
|
* Take a snapshot of the GPE info for this level
|
|
*/
|
|
AcpiCmAcquireMutex (ACPI_MTX_EVENTS);
|
|
GpeInfo = AcpiGbl_GpeInfo [GpeNumber];
|
|
AcpiCmReleaseMutex (ACPI_MTX_EVENTS);
|
|
|
|
/*
|
|
* Method Handler (_Lxx, _Exx):
|
|
* ----------------------------
|
|
* Evaluate the _Lxx/_Exx control method that corresponds to this GPE.
|
|
*/
|
|
if (GpeInfo.MethodHandle)
|
|
{
|
|
AcpiNsEvaluateByHandle (GpeInfo.MethodHandle, NULL, NULL);
|
|
}
|
|
|
|
/*
|
|
* Level-Triggered?
|
|
* ----------------
|
|
* If level-triggered we clear the GPE status bit after handling the event.
|
|
*/
|
|
if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED)
|
|
{
|
|
AcpiHwClearGpe (GpeNumber);
|
|
}
|
|
|
|
/*
|
|
* Enable the GPE.
|
|
*/
|
|
AcpiHwEnableGpe (GpeNumber);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvGpeDispatch
|
|
*
|
|
* PARAMETERS: GpeNumber - The 0-based Gpe number
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Handle and dispatch a General Purpose AcpiEvent.
|
|
* Clears the status bit for the requested event.
|
|
*
|
|
* TBD: [Investigate] is this still valid or necessary:
|
|
* The Gpe handler differs from the fixed events in that it clears the enable
|
|
* bit rather than the status bit to clear the interrupt. This allows
|
|
* software outside of interrupt context to determine what caused the SCI and
|
|
* dispatch the correct AML.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiEvGpeDispatch (
|
|
UINT32 GpeNumber)
|
|
{
|
|
ACPI_GPE_LEVEL_INFO GpeInfo;
|
|
|
|
FUNCTION_TRACE ("EvGpeDispatch");
|
|
|
|
/*DEBUG_INCREMENT_EVENT_COUNT (EVENT_GENERAL);*/
|
|
|
|
/*
|
|
* Valid GPE number?
|
|
*/
|
|
if (AcpiGbl_GpeValid[GpeNumber] == ACPI_GPE_INVALID)
|
|
{
|
|
DEBUG_PRINT (ACPI_ERROR, ("Invalid GPE bit [%X].\n", GpeNumber));
|
|
return_VALUE (INTERRUPT_NOT_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* Disable the GPE.
|
|
*/
|
|
AcpiHwDisableGpe (GpeNumber);
|
|
|
|
GpeInfo = AcpiGbl_GpeInfo [GpeNumber];
|
|
|
|
/*
|
|
* Edge-Triggered?
|
|
* ---------------
|
|
* If edge-triggered, clear the GPE status bit now. Note that
|
|
* level-triggered events are cleared after the GPE is serviced.
|
|
*/
|
|
if (GpeInfo.Type & ACPI_EVENT_EDGE_TRIGGERED)
|
|
{
|
|
AcpiHwClearGpe (GpeNumber);
|
|
}
|
|
/*
|
|
* Function Handler (e.g. EC)?
|
|
*/
|
|
if (GpeInfo.Handler)
|
|
{
|
|
/* Invoke function handler (at interrupt level). */
|
|
GpeInfo.Handler (GpeInfo.Context);
|
|
|
|
/* Level-Triggered? */
|
|
if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED)
|
|
{
|
|
AcpiHwClearGpe (GpeNumber);
|
|
}
|
|
|
|
/* Enable GPE */
|
|
AcpiHwEnableGpe (GpeNumber);
|
|
}
|
|
/*
|
|
* Method Handler (e.g. _Exx/_Lxx)?
|
|
*/
|
|
else if (GpeInfo.MethodHandle)
|
|
{
|
|
if (ACPI_FAILURE(AcpiOsQueueForExecution (OSD_PRIORITY_GPE,
|
|
AcpiEvAsynchExecuteGpeMethod, (void*)(NATIVE_UINT)GpeNumber)))
|
|
{
|
|
/*
|
|
* Shoudn't occur, but if it does report an error. Note that
|
|
* the GPE will remain disabled until the ACPI Core Subsystem
|
|
* is restarted, or the handler is removed/reinstalled.
|
|
*/
|
|
REPORT_ERROR (("AcpiEvGpeDispatch: Unable to queue handler for GPE bit [%X]\n", GpeNumber));
|
|
}
|
|
}
|
|
/*
|
|
* No Handler? Report an error and leave the GPE disabled.
|
|
*/
|
|
else
|
|
{
|
|
REPORT_ERROR (("AcpiEvGpeDispatch: No installed handler for GPE [%X]\n", GpeNumber));
|
|
|
|
/* Level-Triggered? */
|
|
if (GpeInfo.Type & ACPI_EVENT_LEVEL_TRIGGERED)
|
|
{
|
|
AcpiHwClearGpe (GpeNumber);
|
|
}
|
|
}
|
|
|
|
return_VALUE (INTERRUPT_HANDLED);
|
|
}
|