841 lines
24 KiB
C
841 lines
24 KiB
C
/******************************************************************************
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*
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* Module Name: evgpe - General Purpose Event handling and dispatch
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/include/acevents.h>
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#include <contrib/dev/acpica/include/acnamesp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evgpe")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/* Local prototypes */
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static void ACPI_SYSTEM_XFACE
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AcpiEvAsynchExecuteGpeMethod (
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void *Context);
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static void ACPI_SYSTEM_XFACE
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AcpiEvAsynchEnableGpe (
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void *Context);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvUpdateGpeEnableMask
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*
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* PARAMETERS: GpeEventInfo - GPE to update
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*
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* RETURN: Status
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*
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* DESCRIPTION: Updates GPE register enable mask based upon whether there are
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* runtime references to this GPE
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvUpdateGpeEnableMask (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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UINT32 RegisterBit;
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ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMask);
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GpeRegisterInfo = GpeEventInfo->RegisterInfo;
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if (!GpeRegisterInfo)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
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/* Clear the run bit up front */
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ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit);
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/* Set the mask bit only if there are references to this GPE */
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if (GpeEventInfo->RuntimeCount)
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{
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ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, (UINT8) RegisterBit);
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvEnableGpe
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*
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* PARAMETERS: GpeEventInfo - GPE to enable
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear a GPE of stale events and enable it.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvEnableGpe (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvEnableGpe);
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/*
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* We will only allow a GPE to be enabled if it has either an associated
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* method (_Lxx/_Exx) or a handler, or is using the implicit notify
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* feature. Otherwise, the GPE will be immediately disabled by
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* AcpiEvGpeDispatch the first time it fires.
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*/
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if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
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ACPI_GPE_DISPATCH_NONE)
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{
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return_ACPI_STATUS (AE_NO_HANDLER);
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}
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/* Clear the GPE (of stale events) */
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Status = AcpiHwClearGpe (GpeEventInfo);
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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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/* Enable the requested GPE */
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Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
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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: AcpiEvAddGpeReference
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*
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* PARAMETERS: GpeEventInfo - Add a reference to this GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
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* hardware-enabled.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvAddGpeReference (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (EvAddGpeReference);
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if (GpeEventInfo->RuntimeCount == ACPI_UINT8_MAX)
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{
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return_ACPI_STATUS (AE_LIMIT);
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}
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GpeEventInfo->RuntimeCount++;
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if (GpeEventInfo->RuntimeCount == 1)
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{
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/* Enable on first reference */
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Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
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if (ACPI_SUCCESS (Status))
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{
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Status = AcpiEvEnableGpe (GpeEventInfo);
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}
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if (ACPI_FAILURE (Status))
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{
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GpeEventInfo->RuntimeCount--;
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}
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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: AcpiEvRemoveGpeReference
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*
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* PARAMETERS: GpeEventInfo - Remove a reference to this GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a reference to a GPE. When the last reference is
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* removed, the GPE is hardware-disabled.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvRemoveGpeReference (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (EvRemoveGpeReference);
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if (!GpeEventInfo->RuntimeCount)
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{
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return_ACPI_STATUS (AE_LIMIT);
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}
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GpeEventInfo->RuntimeCount--;
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if (!GpeEventInfo->RuntimeCount)
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{
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/* Disable on last reference */
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Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
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if (ACPI_SUCCESS (Status))
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{
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Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
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}
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if (ACPI_FAILURE (Status))
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{
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GpeEventInfo->RuntimeCount++;
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}
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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: AcpiEvLowGetGpeInfo
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*
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* PARAMETERS: GpeNumber - Raw GPE number
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* GpeBlock - A GPE info block
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*
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* RETURN: A GPE EventInfo struct. NULL if not a valid GPE (The GpeNumber
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* is not within the specified GPE block)
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*
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* DESCRIPTION: Returns the EventInfo struct associated with this GPE. This is
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* the low-level implementation of EvGetGpeEventInfo.
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*
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******************************************************************************/
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ACPI_GPE_EVENT_INFO *
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AcpiEvLowGetGpeInfo (
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UINT32 GpeNumber,
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ACPI_GPE_BLOCK_INFO *GpeBlock)
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{
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UINT32 GpeIndex;
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/*
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* Validate that the GpeNumber is within the specified GpeBlock.
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* (Two steps)
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*/
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if (!GpeBlock ||
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(GpeNumber < GpeBlock->BlockBaseNumber))
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{
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return (NULL);
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}
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GpeIndex = GpeNumber - GpeBlock->BlockBaseNumber;
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if (GpeIndex >= GpeBlock->GpeCount)
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{
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return (NULL);
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}
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return (&GpeBlock->EventInfo[GpeIndex]);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGetGpeEventInfo
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*
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* PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
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* GpeNumber - Raw GPE number
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*
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* RETURN: A GPE EventInfo struct. NULL if not a valid GPE
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*
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* DESCRIPTION: Returns the EventInfo struct associated with this GPE.
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* Validates the GpeBlock and the GpeNumber
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*
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* Should be called only when the GPE lists are semaphore locked
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* and not subject to change.
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*
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******************************************************************************/
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ACPI_GPE_EVENT_INFO *
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AcpiEvGetGpeEventInfo (
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ACPI_HANDLE GpeDevice,
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UINT32 GpeNumber)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_GPE_EVENT_INFO *GpeInfo;
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UINT32 i;
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ACPI_FUNCTION_ENTRY ();
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/* A NULL GpeDevice means use the FADT-defined GPE block(s) */
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if (!GpeDevice)
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{
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/* Examine GPE Block 0 and 1 (These blocks are permanent) */
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for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++)
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{
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GpeInfo = AcpiEvLowGetGpeInfo (GpeNumber,
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AcpiGbl_GpeFadtBlocks[i]);
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if (GpeInfo)
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{
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return (GpeInfo);
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}
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}
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/* The GpeNumber was not in the range of either FADT GPE block */
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return (NULL);
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}
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/* A Non-NULL GpeDevice means this is a GPE Block Device */
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ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice);
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if (!ObjDesc ||
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!ObjDesc->Device.GpeBlock)
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{
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return (NULL);
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}
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return (AcpiEvLowGetGpeInfo (GpeNumber, ObjDesc->Device.GpeBlock));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGpeDetect
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*
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* PARAMETERS: GpeXruptList - Interrupt block for this interrupt.
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* Can have multiple GPE blocks attached.
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*
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Detect if any GP events have occurred. This function is
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* executed at interrupt level.
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*
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******************************************************************************/
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UINT32
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AcpiEvGpeDetect (
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ACPI_GPE_XRUPT_INFO *GpeXruptList)
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{
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ACPI_STATUS Status;
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ACPI_GPE_BLOCK_INFO *GpeBlock;
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
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UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
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UINT8 EnabledStatusByte;
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UINT32 StatusReg;
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UINT32 EnableReg;
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ACPI_CPU_FLAGS Flags;
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UINT32 i;
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UINT32 j;
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ACPI_FUNCTION_NAME (EvGpeDetect);
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/* Check for the case where there are no GPEs */
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if (!GpeXruptList)
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{
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return (IntStatus);
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}
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/*
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* We need to obtain the GPE lock for both the data structs and registers
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* Note: Not necessary to obtain the hardware lock, since the GPE
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* registers are owned by the GpeLock.
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*/
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Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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/* Examine all GPE blocks attached to this interrupt level */
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GpeBlock = GpeXruptList->GpeBlockListHead;
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while (GpeBlock)
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{
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/*
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* Read all of the 8-bit GPE status and enable registers in this GPE
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* block, saving all of them. Find all currently active GP events.
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*/
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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/* Get the next status/enable pair */
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GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
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/*
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* Optimization: If there are no GPEs enabled within this
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* register, we can safely ignore the entire register.
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*/
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if (!(GpeRegisterInfo->EnableForRun |
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GpeRegisterInfo->EnableForWake))
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{
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continue;
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}
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/* Read the Status Register */
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Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress);
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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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/* Read the Enable Register */
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Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress);
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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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ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
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"Read GPE Register at GPE%02X: Status=%02X, Enable=%02X\n",
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GpeRegisterInfo->BaseGpeNumber, StatusReg, EnableReg));
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/* Check if there is anything active at all in this register */
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EnabledStatusByte = (UINT8) (StatusReg & EnableReg);
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if (!EnabledStatusByte)
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{
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/* No active GPEs in this register, move on */
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continue;
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}
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/* Now look at the individual GPEs in this byte register */
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
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{
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/* Examine one GPE bit */
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if (EnabledStatusByte & (1 << j))
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{
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/*
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* Found an active GPE. Dispatch the event to a handler
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* or method.
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*/
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IntStatus |= AcpiEvGpeDispatch (GpeBlock->Node,
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&GpeBlock->EventInfo[((ACPI_SIZE) i *
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ACPI_GPE_REGISTER_WIDTH) + j],
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j + GpeRegisterInfo->BaseGpeNumber);
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}
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}
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}
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GpeBlock = GpeBlock->Next;
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}
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UnlockAndExit:
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AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
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return (IntStatus);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvAsynchExecuteGpeMethod
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*
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* PARAMETERS: Context (GpeEventInfo) - Info for this GPE
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*
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* RETURN: None
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*
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* DESCRIPTION: Perform the actual execution of a GPE control method. This
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* function is called from an invocation of AcpiOsExecute and
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* therefore does NOT execute at interrupt level - so that
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* the control method itself is not executed in the context of
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* an interrupt handler.
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*
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******************************************************************************/
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static void ACPI_SYSTEM_XFACE
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AcpiEvAsynchExecuteGpeMethod (
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void *Context)
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{
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ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
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ACPI_STATUS Status;
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ACPI_GPE_EVENT_INFO *LocalGpeEventInfo;
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ACPI_EVALUATE_INFO *Info;
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ACPI_GPE_NOTIFY_INFO *Notify;
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ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod);
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/* Allocate a local GPE block */
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LocalGpeEventInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_EVENT_INFO));
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if (!LocalGpeEventInfo)
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{
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ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
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"while handling a GPE"));
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return_VOID;
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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_VOID;
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}
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/* Must revalidate the GpeNumber/GpeBlock */
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if (!AcpiEvValidGpeEvent (GpeEventInfo))
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{
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Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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return_VOID;
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}
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/*
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* Take a snapshot of the GPE info for this level - we copy the info to
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* prevent a race condition with RemoveHandler/RemoveBlock.
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*/
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ACPI_MEMCPY (LocalGpeEventInfo, GpeEventInfo,
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sizeof (ACPI_GPE_EVENT_INFO));
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Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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/* Do the correct dispatch - normal method or implicit notify */
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switch (LocalGpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)
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{
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case ACPI_GPE_DISPATCH_NOTIFY:
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/*
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* Implicit notify.
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* Dispatch a DEVICE_WAKE notify to the appropriate handler.
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* NOTE: the request is queued for execution after this method
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* completes. The notify handlers are NOT invoked synchronously
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* from this thread -- because handlers may in turn run other
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* control methods.
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*
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* June 2012: Expand implicit notify mechanism to support
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* notifies on multiple device objects.
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*/
|
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Notify = LocalGpeEventInfo->Dispatch.NotifyList;
|
|
while (ACPI_SUCCESS (Status) && Notify)
|
|
{
|
|
Status = AcpiEvQueueNotifyRequest (Notify->DeviceNode,
|
|
ACPI_NOTIFY_DEVICE_WAKE);
|
|
|
|
Notify = Notify->Next;
|
|
}
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
|
|
/* Allocate the evaluation information block */
|
|
|
|
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
|
|
if (!Info)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the
|
|
* _Lxx/_Exx control method that corresponds to this GPE
|
|
*/
|
|
Info->PrefixNode = LocalGpeEventInfo->Dispatch.MethodNode;
|
|
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
|
|
|
|
Status = AcpiNsEvaluate (Info);
|
|
ACPI_FREE (Info);
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"while evaluating GPE method [%4.4s]",
|
|
AcpiUtGetNodeName (LocalGpeEventInfo->Dispatch.MethodNode)));
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
return_VOID; /* Should never happen */
|
|
}
|
|
|
|
/* Defer enabling of GPE until all notify handlers are done */
|
|
|
|
Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
|
|
AcpiEvAsynchEnableGpe, LocalGpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_FREE (LocalGpeEventInfo);
|
|
}
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAsynchEnableGpe
|
|
*
|
|
* PARAMETERS: Context (GpeEventInfo) - Info for this GPE
|
|
* Callback from AcpiOsExecute
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
|
|
* complete (i.e., finish execution of Notify)
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void ACPI_SYSTEM_XFACE
|
|
AcpiEvAsynchEnableGpe (
|
|
void *Context)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
|
|
|
|
|
|
(void) AcpiEvFinishGpe (GpeEventInfo);
|
|
|
|
ACPI_FREE (GpeEventInfo);
|
|
return;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvFinishGpe
|
|
*
|
|
* PARAMETERS: GpeEventInfo - Info for this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution
|
|
* of a GPE method or a synchronous or asynchronous GPE handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvFinishGpe (
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_LEVEL_TRIGGERED)
|
|
{
|
|
/*
|
|
* GPE is level-triggered, we clear the GPE status bit after
|
|
* handling the event.
|
|
*/
|
|
Status = AcpiHwClearGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enable this GPE, conditionally. This means that the GPE will
|
|
* only be physically enabled if the EnableForRun bit is set
|
|
* in the EventInfo.
|
|
*/
|
|
(void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvGpeDispatch
|
|
*
|
|
* PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
|
|
* GpeEventInfo - Info for this GPE
|
|
* GpeNumber - Number relative to the parent GPE block
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
|
|
* or method (e.g. _Lxx/_Exx) handler.
|
|
*
|
|
* This function executes at interrupt level.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiEvGpeDispatch (
|
|
ACPI_NAMESPACE_NODE *GpeDevice,
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo,
|
|
UINT32 GpeNumber)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 ReturnValue;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvGpeDispatch);
|
|
|
|
|
|
/* Invoke global event handler if present */
|
|
|
|
AcpiGpeCount++;
|
|
if (AcpiGbl_GlobalEventHandler)
|
|
{
|
|
AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE, GpeDevice,
|
|
GpeNumber, AcpiGbl_GlobalEventHandlerContext);
|
|
}
|
|
|
|
/*
|
|
* If edge-triggered, clear the GPE status bit now. Note that
|
|
* level-triggered events are cleared after the GPE is serviced.
|
|
*/
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_EDGE_TRIGGERED)
|
|
{
|
|
Status = AcpiHwClearGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Unable to clear GPE%02X", GpeNumber));
|
|
return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Always disable the GPE so that it does not keep firing before
|
|
* any asynchronous activity completes (either from the execution
|
|
* of a GPE method or an asynchronous GPE handler.)
|
|
*
|
|
* If there is no handler or method to run, just disable the
|
|
* GPE and leave it disabled permanently to prevent further such
|
|
* pointless events from firing.
|
|
*/
|
|
Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Unable to disable GPE%02X", GpeNumber));
|
|
return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* Dispatch the GPE to either an installed handler or the control
|
|
* method associated with this GPE (_Lxx or _Exx). If a handler
|
|
* exists, we invoke it and do not attempt to run the method.
|
|
* If there is neither a handler nor a method, leave the GPE
|
|
* disabled.
|
|
*/
|
|
switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)
|
|
{
|
|
case ACPI_GPE_DISPATCH_HANDLER:
|
|
|
|
/* Invoke the installed handler (at interrupt level) */
|
|
|
|
ReturnValue = GpeEventInfo->Dispatch.Handler->Address (
|
|
GpeDevice, GpeNumber,
|
|
GpeEventInfo->Dispatch.Handler->Context);
|
|
|
|
/* If requested, clear (if level-triggered) and reenable the GPE */
|
|
|
|
if (ReturnValue & ACPI_REENABLE_GPE)
|
|
{
|
|
(void) AcpiEvFinishGpe (GpeEventInfo);
|
|
}
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
case ACPI_GPE_DISPATCH_NOTIFY:
|
|
|
|
/*
|
|
* Execute the method associated with the GPE
|
|
* NOTE: Level-triggered GPEs are cleared after the method completes.
|
|
*/
|
|
Status = AcpiOsExecute (OSL_GPE_HANDLER,
|
|
AcpiEvAsynchExecuteGpeMethod, GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Unable to queue handler for GPE%02X - event disabled",
|
|
GpeNumber));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/*
|
|
* No handler or method to run!
|
|
* 03/2010: This case should no longer be possible. We will not allow
|
|
* a GPE to be enabled if it has no handler or method.
|
|
*/
|
|
ACPI_ERROR ((AE_INFO,
|
|
"No handler or method for GPE%02X, disabling event",
|
|
GpeNumber));
|
|
break;
|
|
}
|
|
|
|
return_UINT32 (ACPI_INTERRUPT_HANDLED);
|
|
}
|
|
|
|
#endif /* !ACPI_REDUCED_HARDWARE */
|