9560b6dea8
- 99% of the code is Intel's ACPICA. The license is compliant with BSD and GNU and virtually all systems that use ACPI use this code, For instance it is part of the Linux kernel. - The only minix specific files are acpi.c osminixxf.c platform/acminix.h and include/minix/acpi.h - At the moment the driver does not register interrupt hooks which I believe is mainly for handling PnP, events like "battery level is low" and power management. Should not be difficult to add it if need be. - The interface to the outside world is virtually non-existent except a trivial message based service for PCI driver to query which device is connected to what IRQ line. This will evolve as more components start using this driver. VM, Scheduler and IOMMU are the possible users right now. - because of dependency on a native 64bit (long long, part of c99) it is compiled only with a gnu-like compilers which in case of Minix includes gcc llvm-gcc and clang
951 lines
28 KiB
C
951 lines
28 KiB
C
/******************************************************************************
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*
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* Module Name: evxface - External interfaces for ACPI events
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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 - 2010, 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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#define __EVXFACE_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxface")
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/*******************************************************************************
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*
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* FUNCTION: AcpiInstallExceptionHandler
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*
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* PARAMETERS: Handler - Pointer to the handler function for the
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* event
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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
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallExceptionHandler (
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ACPI_EXCEPTION_HANDLER Handler)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiInstallExceptionHandler);
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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 (AcpiGbl_ExceptionHandler)
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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 */
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AcpiGbl_ExceptionHandler = Handler;
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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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ACPI_EXPORT_SYMBOL (AcpiInstallExceptionHandler)
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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, 0);
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if (ACPI_FAILURE (Status))
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{
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ACPI_WARNING ((AE_INFO, "Could not enable fixed event 0x%X", Event));
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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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ACPI_EXPORT_SYMBOL (AcpiInstallFixedEventHandler)
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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, 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_WARNING ((AE_INFO,
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"Could not write to fixed event enable register 0x%X", Event));
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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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ACPI_EXPORT_SYMBOL (AcpiRemoveFixedEventHandler)
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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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* ACPI_ALL_NOTIFY: both system and device
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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 *Node;
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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 ((!Device) ||
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(!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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Node = AcpiNsValidateHandle (Device);
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if (!Node)
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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_SystemNotify.Handler) ||
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((HandlerType & ACPI_DEVICE_NOTIFY) &&
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AcpiGbl_DeviceNotify.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_SystemNotify.Node = Node;
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AcpiGbl_SystemNotify.Handler = Handler;
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AcpiGbl_SystemNotify.Context = Context;
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}
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if (HandlerType & ACPI_DEVICE_NOTIFY)
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{
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AcpiGbl_DeviceNotify.Node = Node;
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AcpiGbl_DeviceNotify.Handler = Handler;
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AcpiGbl_DeviceNotify.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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/* Notifies allowed on this object? */
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if (!AcpiEvIsNotifyObject (Node))
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{
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Status = AE_TYPE;
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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 (Node);
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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->CommonNotify.SystemNotify) ||
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((HandlerType & ACPI_DEVICE_NOTIFY) &&
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ObjDesc->CommonNotify.DeviceNotify))
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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 (Node->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, Node->Type);
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/* Remove local reference to the object */
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AcpiUtRemoveReference (ObjDesc);
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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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|
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/* Install the handler */
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|
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NotifyObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_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->Notify.Node = Node;
|
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NotifyObj->Notify.Handler = Handler;
|
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NotifyObj->Notify.Context = Context;
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if (HandlerType & ACPI_SYSTEM_NOTIFY)
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{
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ObjDesc->CommonNotify.SystemNotify = NotifyObj;
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}
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|
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if (HandlerType & ACPI_DEVICE_NOTIFY)
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{
|
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ObjDesc->CommonNotify.DeviceNotify = NotifyObj;
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}
|
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|
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if (HandlerType == ACPI_ALL_NOTIFY)
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{
|
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/* Extra ref if installed in both */
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AcpiUtAddReference (NotifyObj);
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}
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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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|
|
ACPI_EXPORT_SYMBOL (AcpiInstallNotifyHandler)
|
|
|
|
|
|
/*******************************************************************************
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|
*
|
|
* FUNCTION: AcpiRemoveNotifyHandler
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|
*
|
|
* PARAMETERS: Device - The device for which notifies will be handled
|
|
* HandlerType - The type of handler:
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|
* ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
|
|
* ACPI_DEVICE_NOTIFY: DriverHandler (80-ff)
|
|
* ACPI_ALL_NOTIFY: both system and device
|
|
* Handler - Address of the handler
|
|
*
|
|
* 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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|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
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AcpiRemoveNotifyHandler (
|
|
ACPI_HANDLE Device,
|
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UINT32 HandlerType,
|
|
ACPI_NOTIFY_HANDLER Handler)
|
|
{
|
|
ACPI_OPERAND_OBJECT *NotifyObj;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
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ACPI_NAMESPACE_NODE *Node;
|
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ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler);
|
|
|
|
|
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/* Parameter validation */
|
|
|
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if ((!Device) ||
|
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(!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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}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
Node = AcpiNsValidateHandle (Device);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Root Object */
|
|
|
|
if (Device == ACPI_ROOT_OBJECT)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"Removing notify handler for namespace root object\n"));
|
|
|
|
if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
|
|
!AcpiGbl_SystemNotify.Handler) ||
|
|
((HandlerType & ACPI_DEVICE_NOTIFY) &&
|
|
!AcpiGbl_DeviceNotify.Handler))
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (HandlerType & ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
AcpiGbl_SystemNotify.Node = NULL;
|
|
AcpiGbl_SystemNotify.Handler = NULL;
|
|
AcpiGbl_SystemNotify.Context = NULL;
|
|
}
|
|
|
|
if (HandlerType & ACPI_DEVICE_NOTIFY)
|
|
{
|
|
AcpiGbl_DeviceNotify.Node = NULL;
|
|
AcpiGbl_DeviceNotify.Handler = NULL;
|
|
AcpiGbl_DeviceNotify.Context = NULL;
|
|
}
|
|
}
|
|
|
|
/* All Other Objects */
|
|
|
|
else
|
|
{
|
|
/* Notifies allowed on this object? */
|
|
|
|
if (!AcpiEvIsNotifyObject (Node))
|
|
{
|
|
Status = AE_TYPE;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Object exists - make sure there's an existing handler */
|
|
|
|
if (HandlerType & ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
NotifyObj = ObjDesc->CommonNotify.SystemNotify;
|
|
if (!NotifyObj)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (NotifyObj->Notify.Handler != Handler)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
ObjDesc->CommonNotify.SystemNotify = NULL;
|
|
AcpiUtRemoveReference (NotifyObj);
|
|
}
|
|
|
|
if (HandlerType & ACPI_DEVICE_NOTIFY)
|
|
{
|
|
NotifyObj = ObjDesc->CommonNotify.DeviceNotify;
|
|
if (!NotifyObj)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (NotifyObj->Notify.Handler != Handler)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
ObjDesc->CommonNotify.DeviceNotify = NULL;
|
|
AcpiUtRemoveReference (NotifyObj);
|
|
}
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiRemoveNotifyHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiInstallGpeHandler
|
|
*
|
|
* PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* GpeNumber - The GPE number within the GPE block
|
|
* Type - Whether this GPE should be treated as an
|
|
* edge- or level-triggered interrupt.
|
|
* Address - 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 (
|
|
ACPI_HANDLE GpeDevice,
|
|
UINT32 GpeNumber,
|
|
UINT32 Type,
|
|
ACPI_EVENT_HANDLER Address,
|
|
void *Context)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo;
|
|
ACPI_HANDLER_INFO *Handler;
|
|
ACPI_STATUS Status;
|
|
ACPI_CPU_FLAGS Flags;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiInstallGpeHandler);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!Address) || (Type & ~ACPI_GPE_XRUPT_TYPE_MASK))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
|
|
if (!GpeEventInfo)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Make sure that there isn't a handler there already */
|
|
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
|
|
ACPI_GPE_DISPATCH_HANDLER)
|
|
{
|
|
Status = AE_ALREADY_EXISTS;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Allocate and init handler object */
|
|
|
|
Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_HANDLER_INFO));
|
|
if (!Handler)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Handler->Address = Address;
|
|
Handler->Context = Context;
|
|
Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode;
|
|
|
|
/* Install the handler */
|
|
|
|
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
|
|
GpeEventInfo->Dispatch.Handler = Handler;
|
|
|
|
/* Setup up dispatch flags to indicate handler (vs. method) */
|
|
|
|
GpeEventInfo->Flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
|
|
GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_HANDLER);
|
|
|
|
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiInstallGpeHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiRemoveGpeHandler
|
|
*
|
|
* PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* GpeNumber - The event to remove a handler
|
|
* Address - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for a General Purpose AcpiEvent.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiRemoveGpeHandler (
|
|
ACPI_HANDLE GpeDevice,
|
|
UINT32 GpeNumber,
|
|
ACPI_EVENT_HANDLER Address)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo;
|
|
ACPI_HANDLER_INFO *Handler;
|
|
ACPI_STATUS Status;
|
|
ACPI_CPU_FLAGS Flags;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!Address)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
|
|
if (!GpeEventInfo)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Make sure that a handler is indeed installed */
|
|
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) !=
|
|
ACPI_GPE_DISPATCH_HANDLER)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Make sure that the installed handler is the same */
|
|
|
|
if (GpeEventInfo->Dispatch.Handler->Address != Address)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
|
|
Handler = GpeEventInfo->Dispatch.Handler;
|
|
|
|
/* Restore Method node (if any), set dispatch flags */
|
|
|
|
GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode;
|
|
GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
|
|
if (Handler->MethodNode)
|
|
{
|
|
GpeEventInfo->Flags |= ACPI_GPE_DISPATCH_METHOD;
|
|
}
|
|
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
|
|
|
|
/* Now we can free the handler object */
|
|
|
|
ACPI_FREE (Handler);
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiRemoveGpeHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiAcquireGlobalLock
|
|
*
|
|
* PARAMETERS: Timeout - How long the caller is willing to wait
|
|
* Handle - Where the handle to the lock is returned
|
|
* (if acquired)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Acquire the ACPI Global Lock
|
|
*
|
|
* Note: Allows callers with the same thread ID to acquire the global lock
|
|
* multiple times. In other words, externally, the behavior of the global lock
|
|
* is identical to an AML mutex. On the first acquire, a new handle is
|
|
* returned. On any subsequent calls to acquire by the same thread, the same
|
|
* handle is returned.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiAcquireGlobalLock (
|
|
UINT16 Timeout,
|
|
UINT32 *Handle)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if (!Handle)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Must lock interpreter to prevent race conditions */
|
|
|
|
AcpiExEnterInterpreter ();
|
|
|
|
Status = AcpiExAcquireMutexObject (Timeout,
|
|
AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
/* Return the global lock handle (updated in AcpiEvAcquireGlobalLock) */
|
|
|
|
*Handle = AcpiGbl_GlobalLockHandle;
|
|
}
|
|
|
|
AcpiExExitInterpreter ();
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiAcquireGlobalLock)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiReleaseGlobalLock
|
|
*
|
|
* PARAMETERS: Handle - Returned from AcpiAcquireGlobalLock
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiReleaseGlobalLock (
|
|
UINT32 Handle)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if (!Handle || (Handle != AcpiGbl_GlobalLockHandle))
|
|
{
|
|
return (AE_NOT_ACQUIRED);
|
|
}
|
|
|
|
Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiReleaseGlobalLock)
|
|
|