evgpe.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"

Include dependency graph for evgpe.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EVENTS

Functions
static void ACPI_SYSTEM_XFACE	AcpiEvAsynchExecuteGpeMethod (void *Context)
static void ACPI_SYSTEM_XFACE	AcpiEvAsynchEnableGpe (void *Context)
ACPI_STATUS	AcpiEvUpdateGpeEnableMask (ACPI_GPE_EVENT_INFO *GpeEventInfo)
ACPI_STATUS	AcpiEvEnableGpe (ACPI_GPE_EVENT_INFO *GpeEventInfo)
ACPI_STATUS	AcpiEvMaskGpe (ACPI_GPE_EVENT_INFO *GpeEventInfo, BOOLEAN IsMasked)
ACPI_STATUS	AcpiEvAddGpeReference (ACPI_GPE_EVENT_INFO *GpeEventInfo, BOOLEAN ClearOnEnable)
ACPI_STATUS	AcpiEvRemoveGpeReference (ACPI_GPE_EVENT_INFO *GpeEventInfo)
ACPI_GPE_EVENT_INFO *	AcpiEvLowGetGpeInfo (UINT32 GpeNumber, ACPI_GPE_BLOCK_INFO *GpeBlock)
ACPI_GPE_EVENT_INFO *	AcpiEvGetGpeEventInfo (ACPI_HANDLE GpeDevice, UINT32 GpeNumber)
UINT32	AcpiEvGpeDetect (ACPI_GPE_XRUPT_INFO *GpeXruptList)
ACPI_STATUS	AcpiEvFinishGpe (ACPI_GPE_EVENT_INFO *GpeEventInfo)
UINT32	AcpiEvDetectGpe (ACPI_NAMESPACE_NODE *GpeDevice, ACPI_GPE_EVENT_INFO *GpeEventInfo, UINT32 GpeNumber)
UINT32	AcpiEvGpeDispatch (ACPI_NAMESPACE_NODE *GpeDevice, ACPI_GPE_EVENT_INFO *GpeEventInfo, UINT32 GpeNumber)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EVENTS

Definition at line 49 of file evgpe.c.

Function Documentation

AcpiEvAddGpeReference()

ACPI_STATUS AcpiEvAddGpeReference	(	ACPI_GPE_EVENT_INFO *	GpeEventInfo,
		BOOLEAN	ClearOnEnable
	)

Definition at line 221 of file evgpe.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (EvAddGpeReference);
 
 
    if (GpeEventInfo->RuntimeCount == ACPI_UINT8_MAX)
    {
        return_ACPI_STATUS (AE_LIMIT);
    }
 
    GpeEventInfo->RuntimeCount++;
    if (GpeEventInfo->RuntimeCount == 1)
    {
        /* Enable on first reference */
 
        if (ClearOnEnable)
        {
            (void) AcpiHwClearGpe (GpeEventInfo);
        }
 
        Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
        if (ACPI_SUCCESS (Status))
        {
            Status = AcpiEvEnableGpe (GpeEventInfo);
        }
 
        if (ACPI_FAILURE (Status))
        {
            GpeEventInfo->RuntimeCount--;
        }
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEnableGpe(), AcpiEvInitializeGpeBlock(), and AcpiRemoveGpeHandler().

AcpiEvAsynchEnableGpe()

static void ACPI_SYSTEM_XFACE AcpiEvAsynchEnableGpe ( void *  Context )

static

Definition at line 641 of file evgpe.c.

{
    ACPI_GPE_EVENT_INFO     *GpeEventInfo = Context;
    ACPI_CPU_FLAGS          Flags;
 
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
    (void) AcpiEvFinishGpe (GpeEventInfo);
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
 
    return;
}

Referenced by AcpiEvAsynchExecuteGpeMethod().

AcpiEvAsynchExecuteGpeMethod()

static void ACPI_SYSTEM_XFACE AcpiEvAsynchExecuteGpeMethod ( void *  Context )

static

Definition at line 538 of file evgpe.c.

{
    ACPI_GPE_EVENT_INFO     *GpeEventInfo = Context;
    ACPI_STATUS             Status = AE_OK;
    ACPI_EVALUATE_INFO      *Info;
    ACPI_GPE_NOTIFY_INFO    *Notify;
 
 
    ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod);
 
 
    /* Do the correct dispatch - normal method or implicit notify */
 
    switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags))
    {
    case ACPI_GPE_DISPATCH_NOTIFY:
        /*
         * Implicit notify.
         * Dispatch a DEVICE_WAKE notify to the appropriate handler.
         * NOTE: the request is queued for execution after this method
         * completes. The notify handlers are NOT invoked synchronously
         * from this thread -- because handlers may in turn run other
         * control methods.
         *
         * June 2012: Expand implicit notify mechanism to support
         * notifies on multiple device objects.
         */
        Notify = GpeEventInfo->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 = GpeEventInfo->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 (GpeEventInfo->Dispatch.MethodNode)));
        }
        break;
 
    default:
 
        goto ErrorExit; /* Should never happen */
    }
 
    /* Defer enabling of GPE until all notify handlers are done */
 
    Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
        AcpiEvAsynchEnableGpe, GpeEventInfo);
    if (ACPI_SUCCESS (Status))
    {
        return_VOID;
    }
 
ErrorExit:
    AcpiEvAsynchEnableGpe (GpeEventInfo);
    return_VOID;
}

Referenced by AcpiEvGpeDispatch().

AcpiEvDetectGpe()

UINT32 AcpiEvDetectGpe	(	ACPI_NAMESPACE_NODE *	GpeDevice,
		ACPI_GPE_EVENT_INFO *	GpeEventInfo,
		UINT32	GpeNumber
	)

Definition at line 722 of file evgpe.c.

{
    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
    UINT8                   EnabledStatusByte;
    UINT64                  StatusReg;
    UINT64                  EnableReg;
    UINT32                  RegisterBit;
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    ACPI_GPE_HANDLER_INFO   *GpeHandlerInfo;
    ACPI_CPU_FLAGS          Flags;
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (EvGpeDetect);
 
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 
    if (!GpeEventInfo)
    {
        GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
        if (!GpeEventInfo)
        {
            goto ErrorExit;
        }
    }
 
    /* Get the info block for the entire GPE register */
 
    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
 
    /* Get the register bitmask for this GPE */
 
    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
 
    /* GPE currently enabled (enable bit == 1)? */
 
    Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress);
    if (ACPI_FAILURE (Status))
    {
        goto ErrorExit;
    }
 
    /* GPE currently active (status bit == 1)? */
 
    Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress);
    if (ACPI_FAILURE (Status))
    {
        goto ErrorExit;
    }
 
    /* Check if there is anything active at all in this GPE */
 
    ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
        "Read registers for GPE %02X: Status=%02X, Enable=%02X, "
        "RunEnable=%02X, WakeEnable=%02X\n",
        GpeNumber,
        (UINT32) (StatusReg & RegisterBit),
        (UINT32) (EnableReg & RegisterBit),
        GpeRegisterInfo->EnableForRun,
        GpeRegisterInfo->EnableForWake));
 
    EnabledStatusByte = (UINT8) (StatusReg & EnableReg);
    if (!(EnabledStatusByte & RegisterBit))
    {
        goto ErrorExit;
    }
 
    /* Invoke global event handler if present */
 
    AcpiGpeCount++;
    if (AcpiGbl_GlobalEventHandler)
    {
        AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE,
            GpeDevice, GpeNumber,
            AcpiGbl_GlobalEventHandlerContext);
    }
 
    /* Found an active GPE */
 
    if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
        ACPI_GPE_DISPATCH_RAW_HANDLER)
    {
        /* Dispatch the event to a raw handler */
 
        GpeHandlerInfo = GpeEventInfo->Dispatch.Handler;
 
        /*
         * There is no protection around the namespace node
         * and the GPE handler to ensure a safe destruction
         * because:
         * 1. The namespace node is expected to always
         *    exist after loading a table.
         * 2. The GPE handler is expected to be flushed by
         *    AcpiOsWaitEventsComplete() before the
         *    destruction.
         */
        AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
        IntStatus |= GpeHandlerInfo->Address (
            GpeDevice, GpeNumber, GpeHandlerInfo->Context);
        Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
    }
    else
    {
        /* Dispatch the event to a standard handler or method. */
 
        IntStatus |= AcpiEvGpeDispatch (GpeDevice,
            GpeEventInfo, GpeNumber);
    }
 
ErrorExit:
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return (IntStatus);
}

Referenced by AcpiDispatchGpe(), AcpiEnableGpe(), AcpiEvGpeDetect(), and AcpiRemoveGpeHandler().

AcpiEvEnableGpe()

ACPI_STATUS AcpiEvEnableGpe

(

ACPI_GPE_EVENT_INFO *

GpeEventInfo

)

Definition at line 126 of file evgpe.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (EvEnableGpe);
 
 
    /* Enable the requested GPE */
 
    Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvAddGpeReference().

AcpiEvFinishGpe()

ACPI_STATUS AcpiEvFinishGpe

(

ACPI_GPE_EVENT_INFO *

GpeEventInfo

)

Definition at line 670 of file evgpe.c.

{
    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 EnableMask bit is set
     * in the EventInfo.
     */
    (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
    GpeEventInfo->DisableForDispatch = FALSE;
    return (AE_OK);
}

Referenced by AcpiEvAsynchEnableGpe(), AcpiEvGpeDispatch(), and AcpiFinishGpe().

AcpiEvGetGpeEventInfo()

ACPI_GPE_EVENT_INFO * AcpiEvGetGpeEventInfo	(	ACPI_HANDLE	GpeDevice,
		UINT32	GpeNumber
	)

Definition at line 372 of file evgpe.c.

{
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_GPE_EVENT_INFO     *GpeInfo;
    UINT32                  i;
 
 
    ACPI_FUNCTION_ENTRY ();
 
 
    /* A NULL GpeDevice means use the FADT-defined GPE block(s) */
 
    if (!GpeDevice)
    {
        /* Examine GPE Block 0 and 1 (These blocks are permanent) */
 
        for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++)
        {
            GpeInfo = AcpiEvLowGetGpeInfo (GpeNumber,
                AcpiGbl_GpeFadtBlocks[i]);
            if (GpeInfo)
            {
                return (GpeInfo);
            }
        }
 
        /* The GpeNumber was not in the range of either FADT GPE block */
 
        return (NULL);
    }
 
    /* A Non-NULL GpeDevice means this is a GPE Block Device */
 
    ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice);
    if (!ObjDesc ||
        !ObjDesc->Device.GpeBlock)
    {
        return (NULL);
    }
 
    return (AcpiEvLowGetGpeInfo (GpeNumber, ObjDesc->Device.GpeBlock));
}

Referenced by AcpiClearGpe(), AcpiDisableGpe(), AcpiEnableGpe(), AcpiEvDetectGpe(), AcpiEvInstallGpeHandler(), AcpiFinishGpe(), AcpiGetGpeStatus(), AcpiMarkGpeForWake(), AcpiMaskGpe(), AcpiRemoveGpeHandler(), AcpiSetGpe(), AcpiSetGpeWakeMask(), and AcpiSetupGpeForWake().

AcpiEvGpeDetect()

UINT32 AcpiEvGpeDetect

(

ACPI_GPE_XRUPT_INFO *

GpeXruptList

)

Definition at line 433 of file evgpe.c.

{
    ACPI_GPE_BLOCK_INFO     *GpeBlock;
    ACPI_NAMESPACE_NODE     *GpeDevice;
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    UINT32                  GpeNumber;
    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
    ACPI_CPU_FLAGS          Flags;
    UINT32                  i;
    UINT32                  j;
 
 
    ACPI_FUNCTION_NAME (EvGpeDetect);
 
    /* Check for the case where there are no GPEs */
 
    if (!GpeXruptList)
    {
        return (IntStatus);
    }
 
    /*
     * We need to obtain the GPE lock for both the data structs and registers
     * Note: Not necessary to obtain the hardware lock, since the GPE
     * registers are owned by the GpeLock.
     */
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 
    /* Examine all GPE blocks attached to this interrupt level */
 
    GpeBlock = GpeXruptList->GpeBlockListHead;
    while (GpeBlock)
    {
        GpeDevice = GpeBlock->Node;
 
        /*
         * Read all of the 8-bit GPE status and enable registers in this GPE
         * block, saving all of them. Find all currently active GP events.
         */
        for (i = 0; i < GpeBlock->RegisterCount; i++)
        {
            /* Get the next status/enable pair */
 
            GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
 
            /*
             * Optimization: If there are no GPEs enabled within this
             * register, we can safely ignore the entire register.
             */
            if (!(GpeRegisterInfo->EnableForRun |
                  GpeRegisterInfo->EnableForWake))
            {
                ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
                    "Ignore disabled registers for GPE %02X-%02X: "
                    "RunEnable=%02X, WakeEnable=%02X\n",
                    GpeRegisterInfo->BaseGpeNumber,
                    GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
                    GpeRegisterInfo->EnableForRun,
                    GpeRegisterInfo->EnableForWake));
                continue;
            }
 
            /* Now look at the individual GPEs in this byte register */
 
            for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
            {
                /* Detect and dispatch one GPE bit */
 
                GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
                    ACPI_GPE_REGISTER_WIDTH) + j];
                GpeNumber = j + GpeRegisterInfo->BaseGpeNumber;
                AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
                IntStatus |= AcpiEvDetectGpe (
                    GpeDevice, GpeEventInfo, GpeNumber);
                Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
            }
        }
 
        GpeBlock = GpeBlock->Next;
    }
 
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return (IntStatus);
}

Referenced by AcpiEvGpeXruptHandler(), AcpiEvSciXruptHandler(), and AcpiUpdateAllGpes().

AcpiEvGpeDispatch()

UINT32 AcpiEvGpeDispatch	(	ACPI_NAMESPACE_NODE *	GpeDevice,
		ACPI_GPE_EVENT_INFO *	GpeEventInfo,
		UINT32	GpeNumber
	)

Definition at line 857 of file evgpe.c.

{
    ACPI_STATUS             Status;
    UINT32                  ReturnValue;
 
 
    ACPI_FUNCTION_TRACE (EvGpeDispatch);
 
 
    /*
     * 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);
    }
 
    /*
     * 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));
            (void) AcpiHwLowSetGpe (
                GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
            return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
        }
    }
 
    GpeEventInfo->DisableForDispatch = TRUE;
 
    /*
     * 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 (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags))
    {
    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 re-enable 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);
}

Referenced by AcpiEvDetectGpe().

AcpiEvLowGetGpeInfo()

ACPI_GPE_EVENT_INFO * AcpiEvLowGetGpeInfo	(	UINT32	GpeNumber,
		ACPI_GPE_BLOCK_INFO *	GpeBlock
	)

Definition at line 327 of file evgpe.c.

{
    UINT32                  GpeIndex;
 
 
    /*
     * Validate that the GpeNumber is within the specified GpeBlock.
     * (Two steps)
     */
    if (!GpeBlock ||
        (GpeNumber < GpeBlock->BlockBaseNumber))
    {
        return (NULL);
    }
 
    GpeIndex = GpeNumber - GpeBlock->BlockBaseNumber;
    if (GpeIndex >= GpeBlock->GpeCount)
    {
        return (NULL);
    }
 
    return (&GpeBlock->EventInfo[GpeIndex]);
}

Referenced by AcpiEvGetGpeEventInfo(), and AcpiEvMatchGpeMethod().

AcpiEvMaskGpe()

ACPI_STATUS AcpiEvMaskGpe	(	ACPI_GPE_EVENT_INFO *	GpeEventInfo,
		BOOLEAN	IsMasked
	)

Definition at line 156 of file evgpe.c.

{
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    UINT32                  RegisterBit;
 
 
    ACPI_FUNCTION_TRACE (EvMaskGpe);
 
 
    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
    if (!GpeRegisterInfo)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }
 
    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
 
    /* Perform the action */
 
    if (IsMasked)
    {
        if (RegisterBit & GpeRegisterInfo->MaskForRun)
        {
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        }
 
        (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
        ACPI_SET_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit);
    }
    else
    {
        if (!(RegisterBit & GpeRegisterInfo->MaskForRun))
        {
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        }
 
        ACPI_CLEAR_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit);
        if (GpeEventInfo->RuntimeCount &&
            !GpeEventInfo->DisableForDispatch)
        {
            (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
        }
    }
 
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiMaskGpe().

AcpiEvRemoveGpeReference()

ACPI_STATUS AcpiEvRemoveGpeReference

(

ACPI_GPE_EVENT_INFO *

GpeEventInfo

)

Definition at line 276 of file evgpe.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (EvRemoveGpeReference);
 
 
    if (!GpeEventInfo->RuntimeCount)
    {
        return_ACPI_STATUS (AE_LIMIT);
    }
 
    GpeEventInfo->RuntimeCount--;
    if (!GpeEventInfo->RuntimeCount)
    {
        /* Disable on last reference */
 
        Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
        if (ACPI_SUCCESS (Status))
        {
            Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
        }
 
        if (ACPI_FAILURE (Status))
        {
            GpeEventInfo->RuntimeCount++;
        }
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiDisableGpe(), AcpiEvInstallGpeHandler(), and AcpiSetupGpeForWake().

AcpiEvUpdateGpeEnableMask()

ACPI_STATUS AcpiEvUpdateGpeEnableMask

(

ACPI_GPE_EVENT_INFO *

GpeEventInfo

)

Definition at line 79 of file evgpe.c.

{
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    UINT32                  RegisterBit;
 
 
    ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMask);
 
 
    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
    if (!GpeRegisterInfo)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }
 
    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
 
    /* Clear the run bit up front */
 
    ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit);
 
    /* Set the mask bit only if there are references to this GPE */
 
    if (GpeEventInfo->RuntimeCount)
    {
        ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, (UINT8) RegisterBit);
    }
 
    GpeRegisterInfo->EnableMask = GpeRegisterInfo->EnableForRun;
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiEvAddGpeReference(), and AcpiEvRemoveGpeReference().