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391 lines
13 KiB
C
391 lines
13 KiB
C
/******************************************************************************
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*
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* Module Name: evevent - Fixed Event handling and dispatch
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#include "acpi.h"
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#include "accommon.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evevent")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiEvFixedEventInitialize (
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void);
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static UINT32
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AcpiEvFixedEventDispatch (
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UINT32 Event);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInitializeEvents
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInitializeEvents (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvInitializeEvents);
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/*
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* Initialize the Fixed and General Purpose Events. This is done prior to
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* enabling SCIs to prevent interrupts from occurring before the handlers
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* are installed.
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*/
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Status = AcpiEvFixedEventInitialize ();
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Unable to initialize fixed events"));
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return_ACPI_STATUS (Status);
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}
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Status = AcpiEvGpeInitialize ();
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Unable to initialize general purpose events"));
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return_ACPI_STATUS (Status);
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInstallXruptHandlers
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInstallXruptHandlers (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);
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/* Install the SCI handler */
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Status = AcpiEvInstallSciHandler ();
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Unable to install System Control Interrupt handler"));
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return_ACPI_STATUS (Status);
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}
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/* Install the handler for the Global Lock */
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Status = AcpiEvInitGlobalLockHandler ();
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Unable to initialize Global Lock handler"));
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return_ACPI_STATUS (Status);
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}
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AcpiGbl_EventsInitialized = TRUE;
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvFixedEventInitialize
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install the fixed event handlers and disable all fixed events.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiEvFixedEventInitialize (
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void)
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{
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UINT32 i;
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ACPI_STATUS Status;
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/*
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* Initialize the structure that keeps track of fixed event handlers and
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* enable the fixed events.
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*/
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for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
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{
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AcpiGbl_FixedEventHandlers[i].Handler = NULL;
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AcpiGbl_FixedEventHandlers[i].Context = NULL;
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/* Disable the fixed event */
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if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)
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{
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Status = AcpiWriteBitRegister (
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AcpiGbl_FixedEventInfo[i].EnableRegisterId,
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ACPI_DISABLE_EVENT);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvFixedEventDetect
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*
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* PARAMETERS: None
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Checks the PM status register for active fixed events
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*
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******************************************************************************/
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UINT32
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AcpiEvFixedEventDetect (
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void)
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{
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UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
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UINT32 FixedStatus;
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UINT32 FixedEnable;
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UINT32 i;
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ACPI_FUNCTION_NAME (EvFixedEventDetect);
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/*
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* Read the fixed feature status and enable registers, as all the cases
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* depend on their values. Ignore errors here.
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*/
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(void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
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(void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
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ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
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"Fixed Event Block: Enable %08X Status %08X\n",
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FixedEnable, FixedStatus));
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/*
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* Check for all possible Fixed Events and dispatch those that are active
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*/
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for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
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{
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/* Both the status and enable bits must be on for this event */
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if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&
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(FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))
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{
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/*
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* Found an active (signalled) event. Invoke global event
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* handler if present.
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*/
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AcpiFixedEventCount[i]++;
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if (AcpiGbl_GlobalEventHandler)
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{
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AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL,
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i, AcpiGbl_GlobalEventHandlerContext);
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}
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IntStatus |= AcpiEvFixedEventDispatch (i);
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}
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}
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return (IntStatus);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvFixedEventDispatch
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*
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* PARAMETERS: Event - Event type
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Clears the status bit for the requested event, calls the
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* handler that previously registered for the event.
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*
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******************************************************************************/
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static UINT32
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AcpiEvFixedEventDispatch (
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UINT32 Event)
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{
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ACPI_FUNCTION_ENTRY ();
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/* Clear the status bit */
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(void) AcpiWriteBitRegister (
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AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
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ACPI_CLEAR_STATUS);
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/*
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* Make sure we've got a handler. If not, report an error. The event is
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* disabled to prevent further interrupts.
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*/
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if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
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{
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(void) AcpiWriteBitRegister (
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AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
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ACPI_DISABLE_EVENT);
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ACPI_ERROR ((AE_INFO,
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"No installed handler for fixed event [0x%08X]",
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Event));
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return (ACPI_INTERRUPT_NOT_HANDLED);
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}
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/* Invoke the Fixed Event handler */
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return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
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AcpiGbl_FixedEventHandlers[Event].Context));
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}
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