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 /******************************************************************************
  *
  * Module Name: evevent - Fixed Event handling and dispatch
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights.  You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code.  No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision.  In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change.  Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee.  Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution.  In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government.  In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acevents.h"
 
 #define _COMPONENT          ACPI_EVENTS
         ACPI_MODULE_NAME    ("evevent")
 
 /* Local prototypes */
 
 static ACPI_STATUS
 AcpiEvFixedEventInitialize (
     void);
 
 static UINT32
 AcpiEvFixedEventDispatch (
     UINT32                  Event);
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEvInitializeEvents
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiEvInitializeEvents (
     void)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (EvInitializeEvents);
 
 
     /*
      * Initialize the Fixed and General Purpose Events. This is done prior to
      * enabling SCIs to prevent interrupts from occurring before the handlers
      * are installed.
      */
     Status = AcpiEvFixedEventInitialize ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status,
             "Unable to initialize fixed events"));
         return_ACPI_STATUS (Status);
     }
 
     Status = AcpiEvGpeInitialize ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status,
             "Unable to initialize general purpose events"));
         return_ACPI_STATUS (Status);
     }
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEvInstallFadtGpes
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
  *              (0 and 1). This causes the _PRW methods to be run, so the HW
  *              must be fully initialized at this point, including global lock
  *              support.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiEvInstallFadtGpes (
     void)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (EvInstallFadtGpes);
 
 
     /* Namespace must be locked */
 
     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     /* FADT GPE Block 0 */
 
     (void) AcpiEvInitializeGpeBlock (
                 AcpiGbl_FadtGpeDevice, AcpiGbl_GpeFadtBlocks[0]);
 
     /* FADT GPE Block 1 */
 
     (void) AcpiEvInitializeGpeBlock (
                 AcpiGbl_FadtGpeDevice, AcpiGbl_GpeFadtBlocks[1]);
 
     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
     return_ACPI_STATUS (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEvInstallXruptHandlers
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiEvInstallXruptHandlers (
     void)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);
 
 
     /* Install the SCI handler */
 
     Status = AcpiEvInstallSciHandler ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status,
             "Unable to install System Control Interrupt handler"));
         return_ACPI_STATUS (Status);
     }
 
     /* Install the handler for the Global Lock */
 
     Status = AcpiEvInitGlobalLockHandler ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status,
             "Unable to initialize Global Lock handler"));
         return_ACPI_STATUS (Status);
     }
 
     AcpiGbl_EventsInitialized = TRUE;
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEvFixedEventInitialize
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Install the fixed event handlers and disable all fixed events.
  *
  ******************************************************************************/
 
 static ACPI_STATUS
 AcpiEvFixedEventInitialize (
     void)
 {
     UINT32                  i;
     ACPI_STATUS             Status;
 
 
     /*
      * Initialize the structure that keeps track of fixed event handlers and
      * enable the fixed events.
      */
     for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
     {
         AcpiGbl_FixedEventHandlers[i].Handler = NULL;
         AcpiGbl_FixedEventHandlers[i].Context = NULL;
 
         /* Disable the fixed event */
 
         if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)
         {
             Status = AcpiWriteBitRegister (
                         AcpiGbl_FixedEventInfo[i].EnableRegisterId,
                         ACPI_DISABLE_EVENT);
             if (ACPI_FAILURE (Status))
             {
                 return (Status);
             }
         }
     }
 
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEvFixedEventDetect
  *
  * PARAMETERS:  None
  *
  * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
  *
  * DESCRIPTION: Checks the PM status register for active fixed events
  *
  ******************************************************************************/
 
 UINT32
 AcpiEvFixedEventDetect (
     void)
 {
     UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
     UINT32                  FixedStatus;
     UINT32                  FixedEnable;
     UINT32                  i;
 
 
     ACPI_FUNCTION_NAME (EvFixedEventDetect);
 
 
     /*
      * Read the fixed feature status and enable registers, as all the cases
      * depend on their values. Ignore errors here.
      */
     (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
     (void) AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
 
     ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
         "Fixed Event Block: Enable %08X Status %08X\n",
         FixedEnable, FixedStatus));
 
     /*
      * Check for all possible Fixed Events and dispatch those that are active
      */
     for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
     {
         /* Both the status and enable bits must be on for this event */
 
         if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&
             (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))
         {
             /* Found an active (signalled) event */
 
             AcpiFixedEventCount[i]++;
             IntStatus |= AcpiEvFixedEventDispatch (i);
         }
     }
 
     return (IntStatus);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEvFixedEventDispatch
  *
  * PARAMETERS:  Event               - Event type
  *
  * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
  *
  * DESCRIPTION: Clears the status bit for the requested event, calls the
  *              handler that previously registered for the event.
  *
  ******************************************************************************/
 
 static UINT32
 AcpiEvFixedEventDispatch (
     UINT32                  Event)
 {
 
     ACPI_FUNCTION_ENTRY ();
 
 
     /* Clear the status bit */
 
     (void) AcpiWriteBitRegister (
             AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
             ACPI_CLEAR_STATUS);
 
     /*
      * Make sure we've got a handler. If not, report an error. The event is
      * disabled to prevent further interrupts.
      */
     if (NULL == AcpiGbl_FixedEventHandlers[Event].Handler)
     {
         (void) AcpiWriteBitRegister (
                 AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
                 ACPI_DISABLE_EVENT);
 
         ACPI_ERROR ((AE_INFO,
             "No installed handler for fixed event [%08X]",
             Event));
 
         return (ACPI_INTERRUPT_NOT_HANDLED);
     }
 
     /* Invoke the Fixed Event handler */
 
     return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
                 AcpiGbl_FixedEventHandlers[Event].Context));
 }