817 lines
24 KiB
C
817 lines
24 KiB
C
/******************************************************************************
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*
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* Module Name: evxface - External interfaces for ACPI events
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* $Revision: 125 $
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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 - 2002, 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 prton 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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#define __EVXFACE_C__
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#include "acpi.h"
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#include "achware.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#include "amlcode.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxface")
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/*******************************************************************************
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*
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* FUNCTION: AcpiInstallFixedEventHandler
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*
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* PARAMETERS: Event - Event type to enable.
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* Handler - Pointer to the handler function for the
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* event
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function and then enables the
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* event.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallFixedEventHandler (
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UINT32 Event,
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ACPI_EVENT_HANDLER Handler,
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void *Context)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("AcpiInstallFixedEventHandler");
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/* Parameter validation */
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if (Event > ACPI_EVENT_MAX)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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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_ACPI_STATUS (Status);
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}
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/* Don't allow two handlers. */
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if (NULL != AcpiGbl_FixedEventHandlers[Event].Handler)
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{
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Status = AE_ALREADY_EXISTS;
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goto Cleanup;
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}
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/* Install the handler before enabling the event */
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AcpiGbl_FixedEventHandlers[Event].Handler = Handler;
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AcpiGbl_FixedEventHandlers[Event].Context = Context;
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Status = AcpiEnableEvent (Event, ACPI_EVENT_FIXED, 0);
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Could not enable fixed event.\n"));
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/* Remove the handler */
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AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
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AcpiGbl_FixedEventHandlers[Event].Context = NULL;
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Enabled fixed event %X, Handler=%p\n", Event, Handler));
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}
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Cleanup:
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(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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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: AcpiRemoveFixedEventHandler
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*
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* PARAMETERS: Event - Event type to disable.
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disables the event and unregisters the event handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRemoveFixedEventHandler (
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UINT32 Event,
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ACPI_EVENT_HANDLER Handler)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE ("AcpiRemoveFixedEventHandler");
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/* Parameter validation */
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if (Event > ACPI_EVENT_MAX)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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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_ACPI_STATUS (Status);
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}
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/* Disable the event before removing the handler */
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Status = AcpiDisableEvent(Event, ACPI_EVENT_FIXED, 0);
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/* Always Remove the handler */
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AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
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AcpiGbl_FixedEventHandlers[Event].Context = NULL;
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
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"Could not write to fixed event enable register.\n"));
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Disabled fixed event %X.\n", Event));
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}
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(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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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: AcpiInstallNotifyHandler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* HandlerType - The type of handler:
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* ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
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* ACPI_DEVICE_NOTIFY: DriverHandler (80-ff)
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* Handler - Address of the handler
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for notifies on an ACPI device
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallNotifyHandler (
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ACPI_HANDLE Device,
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UINT32 HandlerType,
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ACPI_NOTIFY_HANDLER Handler,
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void *Context)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *NotifyObj;
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ACPI_NAMESPACE_NODE *DeviceNode;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("AcpiInstallNotifyHandler");
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/* Parameter validation */
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if ((!Handler) ||
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(HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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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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/* Convert and validate the device handle */
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DeviceNode = AcpiNsMapHandleToNode (Device);
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if (!DeviceNode)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/*
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* Root Object:
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* Registering a notify handler on the root object indicates that the
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* caller wishes to receive notifications for all objects. Note that
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* only one <external> global handler can be regsitered (per notify type).
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*/
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if (Device == ACPI_ROOT_OBJECT)
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{
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/* Make sure the handler is not already installed */
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if (((HandlerType == ACPI_SYSTEM_NOTIFY) &&
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AcpiGbl_SysNotify.Handler) ||
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((HandlerType == ACPI_DEVICE_NOTIFY) &&
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AcpiGbl_DrvNotify.Handler))
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{
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Status = AE_ALREADY_EXISTS;
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goto UnlockAndExit;
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}
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if (HandlerType == ACPI_SYSTEM_NOTIFY)
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{
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AcpiGbl_SysNotify.Node = DeviceNode;
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AcpiGbl_SysNotify.Handler = Handler;
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AcpiGbl_SysNotify.Context = Context;
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}
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else /* ACPI_DEVICE_NOTIFY */
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{
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AcpiGbl_DrvNotify.Node = DeviceNode;
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AcpiGbl_DrvNotify.Handler = Handler;
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AcpiGbl_DrvNotify.Context = Context;
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}
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/* Global notify handler installed */
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}
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/*
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* All Other Objects:
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* Caller will only receive notifications specific to the target object.
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* Note that only certain object types can receive notifications.
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*/
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else
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{
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/*
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* These are the ONLY objects that can receive ACPI notifications
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*/
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if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
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(DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
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(DeviceNode->Type != ACPI_TYPE_POWER) &&
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(DeviceNode->Type != ACPI_TYPE_THERMAL))
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Check for an existing internal object */
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ObjDesc = AcpiNsGetAttachedObject (DeviceNode);
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if (ObjDesc)
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{
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/* Object exists - make sure there's no handler */
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if (((HandlerType == ACPI_SYSTEM_NOTIFY) &&
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ObjDesc->Device.SysHandler) ||
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((HandlerType == ACPI_DEVICE_NOTIFY) &&
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ObjDesc->Device.DrvHandler))
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{
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Status = AE_ALREADY_EXISTS;
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goto UnlockAndExit;
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}
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}
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else
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{
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/* Create a new object */
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ObjDesc = AcpiUtCreateInternalObject (DeviceNode->Type);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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/* Attach new object to the Node */
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Status = AcpiNsAttachObject (Device, ObjDesc, DeviceNode->Type);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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}
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/* Install the handler */
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NotifyObj = AcpiUtCreateInternalObject (INTERNAL_TYPE_NOTIFY);
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if (!NotifyObj)
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{
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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NotifyObj->NotifyHandler.Node = DeviceNode;
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NotifyObj->NotifyHandler.Handler = Handler;
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NotifyObj->NotifyHandler.Context = Context;
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if (HandlerType == ACPI_SYSTEM_NOTIFY)
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{
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ObjDesc->Device.SysHandler = NotifyObj;
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}
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else /* ACPI_DEVICE_NOTIFY */
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{
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ObjDesc->Device.DrvHandler = NotifyObj;
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}
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}
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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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: AcpiRemoveNotifyHandler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* HandlerType - The type of handler:
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* ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
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* ACPI_DEVICE_NOTIFY: DriverHandler (80-ff)
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* Handler - Address of the handler
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* RETURN: Status
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*
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* DESCRIPTION: Remove a handler for notifies on an ACPI device
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRemoveNotifyHandler (
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ACPI_HANDLE Device,
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UINT32 HandlerType,
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ACPI_NOTIFY_HANDLER Handler)
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{
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ACPI_OPERAND_OBJECT *NotifyObj;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_NAMESPACE_NODE *DeviceNode;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("AcpiRemoveNotifyHandler");
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|
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/* Parameter validation */
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if ((!Handler) ||
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(HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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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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/* Convert and validate the device handle */
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DeviceNode = AcpiNsMapHandleToNode (Device);
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if (!DeviceNode)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/*
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* Root Object
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*/
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if (Device == ACPI_ROOT_OBJECT)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Removing notify handler for ROOT object.\n"));
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if (((HandlerType == ACPI_SYSTEM_NOTIFY) &&
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!AcpiGbl_SysNotify.Handler) ||
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((HandlerType == ACPI_DEVICE_NOTIFY) &&
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!AcpiGbl_DrvNotify.Handler))
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{
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Status = AE_NOT_EXIST;
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goto UnlockAndExit;
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}
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if (HandlerType == ACPI_SYSTEM_NOTIFY)
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{
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AcpiGbl_SysNotify.Node = NULL;
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AcpiGbl_SysNotify.Handler = NULL;
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AcpiGbl_SysNotify.Context = NULL;
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}
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else
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{
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AcpiGbl_DrvNotify.Node = NULL;
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AcpiGbl_DrvNotify.Handler = NULL;
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AcpiGbl_DrvNotify.Context = NULL;
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}
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}
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/*
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* All Other Objects
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*/
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else
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{
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/*
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* These are the ONLY objects that can receive ACPI notifications
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*/
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if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
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(DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
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(DeviceNode->Type != ACPI_TYPE_POWER) &&
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(DeviceNode->Type != ACPI_TYPE_THERMAL))
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Check for an existing internal object */
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ObjDesc = AcpiNsGetAttachedObject (DeviceNode);
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if (!ObjDesc)
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{
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Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Object exists - make sure there's an existing handler */
|
|
|
|
if (HandlerType == ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
NotifyObj = ObjDesc->Device.SysHandler;
|
|
}
|
|
else
|
|
{
|
|
NotifyObj = ObjDesc->Device.DrvHandler;
|
|
}
|
|
|
|
if ((!NotifyObj) ||
|
|
(NotifyObj->NotifyHandler.Handler != Handler))
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
if (HandlerType == ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
ObjDesc->Device.SysHandler = NULL;
|
|
}
|
|
else
|
|
{
|
|
ObjDesc->Device.DrvHandler = NULL;
|
|
}
|
|
|
|
AcpiUtRemoveReference (NotifyObj);
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiInstallGpeHandler
|
|
*
|
|
* PARAMETERS: GpeNumber - The GPE number. The numbering scheme is
|
|
* bank 0 first, then bank 1.
|
|
* Type - Whether this GPE should be treated as an
|
|
* edge- or level-triggered interrupt.
|
|
* Handler - Address of the handler
|
|
* Context - Value passed to the handler on each GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for a General Purpose Event.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiInstallGpeHandler (
|
|
UINT32 GpeNumber,
|
|
UINT32 Type,
|
|
ACPI_GPE_HANDLER Handler,
|
|
void *Context)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 GpeNumberIndex;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("AcpiInstallGpeHandler");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!Handler)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber);
|
|
if (GpeNumberIndex == ACPI_GPE_INVALID)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Make sure that there isn't a handler there already */
|
|
|
|
if (AcpiGbl_GpeNumberInfo[GpeNumberIndex].Handler)
|
|
{
|
|
Status = AE_ALREADY_EXISTS;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
AcpiGbl_GpeNumberInfo[GpeNumberIndex].Handler = Handler;
|
|
AcpiGbl_GpeNumberInfo[GpeNumberIndex].Context = Context;
|
|
AcpiGbl_GpeNumberInfo[GpeNumberIndex].Type = (UINT8) Type;
|
|
|
|
/* Clear the GPE (of stale events), the enable it */
|
|
|
|
AcpiHwClearGpe (GpeNumber);
|
|
AcpiHwEnableGpe (GpeNumber);
|
|
|
|
|
|
Cleanup:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiRemoveGpeHandler
|
|
*
|
|
* PARAMETERS: GpeNumber - The event to remove a handler
|
|
* Handler - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for a General Purpose AcpiEvent.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiRemoveGpeHandler (
|
|
UINT32 GpeNumber,
|
|
ACPI_GPE_HANDLER Handler)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 GpeNumberIndex;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("AcpiRemoveGpeHandler");
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!Handler)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
GpeNumberIndex = AcpiEvGetGpeNumberIndex (GpeNumber);
|
|
if (GpeNumberIndex == ACPI_GPE_INVALID)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Disable the GPE before removing the handler */
|
|
|
|
AcpiHwDisableGpe (GpeNumber);
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Make sure that the installed handler is the same */
|
|
|
|
if (AcpiGbl_GpeNumberInfo[GpeNumberIndex].Handler != Handler)
|
|
{
|
|
AcpiHwEnableGpe (GpeNumber);
|
|
Status = AE_BAD_PARAMETER;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
AcpiGbl_GpeNumberInfo[GpeNumberIndex].Handler = NULL;
|
|
AcpiGbl_GpeNumberInfo[GpeNumberIndex].Context = NULL;
|
|
|
|
|
|
Cleanup:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiAcquireGlobalLock
|
|
*
|
|
* PARAMETERS: Timeout - How long the caller is willing to wait
|
|
* OutHandle - A handle to the lock if acquired
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Acquire the ACPI Global Lock
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiAcquireGlobalLock (
|
|
UINT32 Timeout,
|
|
UINT32 *Handle)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if (!Handle)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiExEnterInterpreter ();
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
|
|
Status = AcpiEvAcquireGlobalLock (Timeout);
|
|
AcpiExExitInterpreter ();
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
AcpiGbl_GlobalLockHandle++;
|
|
*Handle = AcpiGbl_GlobalLockHandle;
|
|
}
|
|
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiReleaseGlobalLock
|
|
*
|
|
* PARAMETERS: Handle - Returned from AcpiAcquireGlobalLock
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Release the ACPI Global Lock
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiReleaseGlobalLock (
|
|
UINT32 Handle)
|
|
{
|
|
|
|
if (Handle != AcpiGbl_GlobalLockHandle)
|
|
{
|
|
return (AE_NOT_ACQUIRED);
|
|
}
|
|
|
|
AcpiEvReleaseGlobalLock ();
|
|
return (AE_OK);
|
|
}
|
|
|
|
|