--- /dev/null	ven. janv. 17 07:30:05 2014
+++ new/usr/src/common/acpica/components/events/evxface.c	ven. janv. 17 07:30:05 2014
@@ -0,0 +1,1131 @@
+/******************************************************************************
+ *
+ * Module Name: evxface - External interfaces for ACPI events
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2014, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#define __EVXFACE_C__
+#define EXPORT_ACPI_INTERFACES
+
+#include "acpi.h"
+#include "accommon.h"
+#include "acnamesp.h"
+#include "acevents.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+        ACPI_MODULE_NAME    ("evxface")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiInstallNotifyHandler
+ *
+ * PARAMETERS:  Device          - The device for which notifies will be handled
+ *              HandlerType     - The type of handler:
+ *                                  ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
+ *                                  ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
+ *                                  ACPI_ALL_NOTIFY:    Both System and Device
+ *              Handler         - Address of the handler
+ *              Context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for notifications on an ACPI Device,
+ *              ThermalZone, or Processor object.
+ *
+ * NOTES:       The Root namespace object may have only one handler for each
+ *              type of notify (System/Device). Device/Thermal/Processor objects
+ *              may have one device notify handler, and multiple system notify
+ *              handlers.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiInstallNotifyHandler (
+    ACPI_HANDLE             Device,
+    UINT32                  HandlerType,
+    ACPI_NOTIFY_HANDLER     Handler,
+    void                    *Context)
+{
+    ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device);
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_OPERAND_OBJECT     *HandlerObj;
+    ACPI_STATUS             Status;
+    UINT32                  i;
+
+
+    ACPI_FUNCTION_TRACE (AcpiInstallNotifyHandler);
+
+
+    /* Parameter validation */
+
+    if ((!Device) || (!Handler) || (!HandlerType) ||
+        (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /*
+     * Root Object:
+     * Registering a notify handler on the root object indicates that the
+     * caller wishes to receive notifications for all objects. Note that
+     * only one global handler can be registered per notify type.
+     * Ensure that a handler is not already installed.
+     */
+    if (Device == ACPI_ROOT_OBJECT)
+    {
+        for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
+        {
+            if (HandlerType & (i+1))
+            {
+                if (AcpiGbl_GlobalNotify[i].Handler)
+                {
+                    Status = AE_ALREADY_EXISTS;
+                    goto UnlockAndExit;
+                }
+
+                AcpiGbl_GlobalNotify[i].Handler = Handler;
+                AcpiGbl_GlobalNotify[i].Context = Context;
+            }
+        }
+
+        goto UnlockAndExit; /* Global notify handler installed, all done */
+    }
+
+    /*
+     * All Other Objects:
+     * Caller will only receive notifications specific to the target
+     * object. Note that only certain object types are allowed to
+     * receive notifications.
+     */
+
+    /* Are Notifies allowed on this object? */
+
+    if (!AcpiEvIsNotifyObject (Node))
+    {
+        Status = AE_TYPE;
+        goto UnlockAndExit;
+    }
+
+    /* Check for an existing internal object, might not exist */
+
+    ObjDesc = AcpiNsGetAttachedObject (Node);
+    if (!ObjDesc)
+    {
+        /* Create a new object */
+
+        ObjDesc = AcpiUtCreateInternalObject (Node->Type);
+        if (!ObjDesc)
+        {
+            Status = AE_NO_MEMORY;
+            goto UnlockAndExit;
+        }
+
+        /* Attach new object to the Node, remove local reference */
+
+        Status = AcpiNsAttachObject (Device, ObjDesc, Node->Type);
+        AcpiUtRemoveReference (ObjDesc);
+        if (ACPI_FAILURE (Status))
+        {
+            goto UnlockAndExit;
+        }
+    }
+
+    /* Ensure that the handler is not already installed in the lists */
+
+    for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
+    {
+        if (HandlerType & (i+1))
+        {
+            HandlerObj = ObjDesc->CommonNotify.NotifyList[i];
+            while (HandlerObj)
+            {
+                if (HandlerObj->Notify.Handler == Handler)
+                {
+                    Status = AE_ALREADY_EXISTS;
+                    goto UnlockAndExit;
+                }
+
+                HandlerObj = HandlerObj->Notify.Next[i];
+            }
+        }
+    }
+
+    /* Create and populate a new notify handler object */
+
+    HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_NOTIFY);
+    if (!HandlerObj)
+    {
+        Status = AE_NO_MEMORY;
+        goto UnlockAndExit;
+    }
+
+    HandlerObj->Notify.Node = Node;
+    HandlerObj->Notify.HandlerType = HandlerType;
+    HandlerObj->Notify.Handler = Handler;
+    HandlerObj->Notify.Context = Context;
+
+    /* Install the handler at the list head(s) */
+
+    for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
+    {
+        if (HandlerType & (i+1))
+        {
+            HandlerObj->Notify.Next[i] =
+                ObjDesc->CommonNotify.NotifyList[i];
+
+            ObjDesc->CommonNotify.NotifyList[i] = HandlerObj;
+        }
+    }
+
+    /* Add an extra reference if handler was installed in both lists */
+
+    if (HandlerType == ACPI_ALL_NOTIFY)
+    {
+        AcpiUtAddReference (HandlerObj);
+    }
+
+
+UnlockAndExit:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiInstallNotifyHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiRemoveNotifyHandler
+ *
+ * PARAMETERS:  Device          - The device for which the handler is installed
+ *              HandlerType     - The type of handler:
+ *                                  ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
+ *                                  ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
+ *                                  ACPI_ALL_NOTIFY:    Both System and Device
+ *              Handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiRemoveNotifyHandler (
+    ACPI_HANDLE             Device,
+    UINT32                  HandlerType,
+    ACPI_NOTIFY_HANDLER     Handler)
+{
+    ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device);
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_OPERAND_OBJECT     *HandlerObj;
+    ACPI_OPERAND_OBJECT     *PreviousHandlerObj;
+    ACPI_STATUS             Status;
+    UINT32                  i;
+
+
+    ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler);
+
+
+    /* Parameter validation */
+
+    if ((!Device) || (!Handler) || (!HandlerType) ||
+        (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    /* Make sure all deferred notify tasks are completed */
+
+    AcpiOsWaitEventsComplete ();
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Root Object. Global handlers are removed here */
+
+    if (Device == ACPI_ROOT_OBJECT)
+    {
+        for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
+        {
+            if (HandlerType & (i+1))
+            {
+                if (!AcpiGbl_GlobalNotify[i].Handler ||
+                    (AcpiGbl_GlobalNotify[i].Handler != Handler))
+                {
+                    Status = AE_NOT_EXIST;
+                    goto UnlockAndExit;
+                }
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                    "Removing global notify handler\n"));
+
+                AcpiGbl_GlobalNotify[i].Handler = NULL;
+                AcpiGbl_GlobalNotify[i].Context = NULL;
+            }
+        }
+
+        goto UnlockAndExit;
+    }
+
+    /* All other objects: Are Notifies allowed on this object? */
+
+    if (!AcpiEvIsNotifyObject (Node))
+    {
+        Status = AE_TYPE;
+        goto UnlockAndExit;
+    }
+
+    /* Must have an existing internal object */
+
+    ObjDesc = AcpiNsGetAttachedObject (Node);
+    if (!ObjDesc)
+    {
+        Status = AE_NOT_EXIST;
+        goto UnlockAndExit;
+    }
+
+    /* Internal object exists. Find the handler and remove it */
+
+    for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
+    {
+        if (HandlerType & (i+1))
+        {
+            HandlerObj = ObjDesc->CommonNotify.NotifyList[i];
+            PreviousHandlerObj = NULL;
+
+            /* Attempt to find the handler in the handler list */
+
+            while (HandlerObj &&
+                  (HandlerObj->Notify.Handler != Handler))
+            {
+                PreviousHandlerObj = HandlerObj;
+                HandlerObj = HandlerObj->Notify.Next[i];
+            }
+
+            if (!HandlerObj)
+            {
+                Status = AE_NOT_EXIST;
+                goto UnlockAndExit;
+            }
+
+            /* Remove the handler object from the list */
+
+            if (PreviousHandlerObj) /* Handler is not at the list head */
+            {
+                PreviousHandlerObj->Notify.Next[i] =
+                    HandlerObj->Notify.Next[i];
+            }
+            else /* Handler is at the list head */
+            {
+                ObjDesc->CommonNotify.NotifyList[i] =
+                    HandlerObj->Notify.Next[i];
+            }
+
+            AcpiUtRemoveReference (HandlerObj);
+        }
+    }
+
+
+UnlockAndExit:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiRemoveNotifyHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiInstallExceptionHandler
+ *
+ * PARAMETERS:  Handler         - Pointer to the handler function for the
+ *                                event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiInstallExceptionHandler (
+    ACPI_EXCEPTION_HANDLER  Handler)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiInstallExceptionHandler);
+
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Don't allow two handlers. */
+
+    if (AcpiGbl_ExceptionHandler)
+    {
+        Status = AE_ALREADY_EXISTS;
+        goto Cleanup;
+    }
+
+    /* Install the handler */
+
+    AcpiGbl_ExceptionHandler = Handler;
+
+Cleanup:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiInstallExceptionHandler)
+
+
+#if (!ACPI_REDUCED_HARDWARE)
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiInstallSciHandler
+ *
+ * PARAMETERS:  Address             - Address of the handler
+ *              Context             - Value passed to the handler on each SCI
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a System Control Interrupt.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiInstallSciHandler (
+    ACPI_SCI_HANDLER        Address,
+    void                    *Context)
+{
+    ACPI_SCI_HANDLER_INFO   *NewSciHandler;
+    ACPI_SCI_HANDLER_INFO   *SciHandler;
+    ACPI_CPU_FLAGS          Flags;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiInstallSciHandler);
+
+
+    if (!Address)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    /* Allocate and init a handler object */
+
+    NewSciHandler = ACPI_ALLOCATE (sizeof (ACPI_SCI_HANDLER_INFO));
+    if (!NewSciHandler)
+    {
+        return_ACPI_STATUS (AE_NO_MEMORY);
+    }
+
+    NewSciHandler->Address = Address;
+    NewSciHandler->Context = Context;
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        goto Exit;
+    }
+
+    /* Lock list during installation */
+
+    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
+    SciHandler = AcpiGbl_SciHandlerList;
+
+    /* Ensure handler does not already exist */
+
+    while (SciHandler)
+    {
+        if (Address == SciHandler->Address)
+        {
+            Status = AE_ALREADY_EXISTS;
+            goto UnlockAndExit;
+        }
+
+        SciHandler = SciHandler->Next;
+    }
+
+    /* Install the new handler into the global list (at head) */
+
+    NewSciHandler->Next = AcpiGbl_SciHandlerList;
+    AcpiGbl_SciHandlerList = NewSciHandler;
+
+
+UnlockAndExit:
+
+    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+
+Exit:
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_FREE (NewSciHandler);
+    }
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiRemoveSciHandler
+ *
+ * PARAMETERS:  Address             - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for a System Control Interrupt.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiRemoveSciHandler (
+    ACPI_SCI_HANDLER        Address)
+{
+    ACPI_SCI_HANDLER_INFO   *PrevSciHandler;
+    ACPI_SCI_HANDLER_INFO   *NextSciHandler;
+    ACPI_CPU_FLAGS          Flags;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiRemoveSciHandler);
+
+
+    if (!Address)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Remove the SCI handler with lock */
+
+    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
+
+    PrevSciHandler = NULL;
+    NextSciHandler = AcpiGbl_SciHandlerList;
+    while (NextSciHandler)
+    {
+        if (NextSciHandler->Address == Address)
+        {
+            /* Unlink and free the SCI handler info block */
+
+            if (PrevSciHandler)
+            {
+                PrevSciHandler->Next = NextSciHandler->Next;
+            }
+            else
+            {
+                AcpiGbl_SciHandlerList = NextSciHandler->Next;
+            }
+
+            AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+            ACPI_FREE (NextSciHandler);
+            goto UnlockAndExit;
+        }
+
+        PrevSciHandler = NextSciHandler;
+        NextSciHandler = NextSciHandler->Next;
+    }
+
+    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+    Status = AE_NOT_EXIST;
+
+
+UnlockAndExit:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiInstallGlobalEventHandler
+ *
+ * PARAMETERS:  Handler         - Pointer to the global event handler function
+ *              Context         - Value passed to the handler on each event
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function. The global handler
+ *              is invoked upon each incoming GPE and Fixed Event. It is
+ *              invoked at interrupt level at the time of the event dispatch.
+ *              Can be used to update event counters, etc.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiInstallGlobalEventHandler (
+    ACPI_GBL_EVENT_HANDLER  Handler,
+    void                    *Context)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiInstallGlobalEventHandler);
+
+
+    /* Parameter validation */
+
+    if (!Handler)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Don't allow two handlers. */
+
+    if (AcpiGbl_GlobalEventHandler)
+    {
+        Status = AE_ALREADY_EXISTS;
+        goto Cleanup;
+    }
+
+    AcpiGbl_GlobalEventHandler = Handler;
+    AcpiGbl_GlobalEventHandlerContext = Context;
+
+
+Cleanup:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiInstallGlobalEventHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiInstallFixedEventHandler
+ *
+ * PARAMETERS:  Event           - Event type to enable.
+ *              Handler         - Pointer to the handler function for the
+ *                                event
+ *              Context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function and then enables the
+ *              event.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiInstallFixedEventHandler (
+    UINT32                  Event,
+    ACPI_EVENT_HANDLER      Handler,
+    void                    *Context)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiInstallFixedEventHandler);
+
+
+    /* Parameter validation */
+
+    if (Event > ACPI_EVENT_MAX)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Do not allow multiple handlers */
+
+    if (AcpiGbl_FixedEventHandlers[Event].Handler)
+    {
+        Status = AE_ALREADY_EXISTS;
+        goto Cleanup;
+    }
+
+    /* Install the handler before enabling the event */
+
+    AcpiGbl_FixedEventHandlers[Event].Handler = Handler;
+    AcpiGbl_FixedEventHandlers[Event].Context = Context;
+
+    Status = AcpiEnableEvent (Event, 0);
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_WARNING ((AE_INFO,
+            "Could not enable fixed event - %s (%u)",
+            AcpiUtGetEventName (Event), Event));
+
+        /* Remove the handler */
+
+        AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
+        AcpiGbl_FixedEventHandlers[Event].Context = NULL;
+    }
+    else
+    {
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+            "Enabled fixed event %s (%X), Handler=%p\n",
+            AcpiUtGetEventName (Event), Event, Handler));
+    }
+
+
+Cleanup:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiInstallFixedEventHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiRemoveFixedEventHandler
+ *
+ * PARAMETERS:  Event           - Event type to disable.
+ *              Handler         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disables the event and unregisters the event handler.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiRemoveFixedEventHandler (
+    UINT32                  Event,
+    ACPI_EVENT_HANDLER      Handler)
+{
+    ACPI_STATUS             Status = AE_OK;
+
+
+    ACPI_FUNCTION_TRACE (AcpiRemoveFixedEventHandler);
+
+
+    /* Parameter validation */
+
+    if (Event > ACPI_EVENT_MAX)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Disable the event before removing the handler */
+
+    Status = AcpiDisableEvent (Event, 0);
+
+    /* Always Remove the handler */
+
+    AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
+    AcpiGbl_FixedEventHandlers[Event].Context = NULL;
+
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_WARNING ((AE_INFO,
+            "Could not disable fixed event - %s (%u)",
+            AcpiUtGetEventName (Event), Event));
+    }
+    else
+    {
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+            "Disabled fixed event - %s (%X)\n",
+            AcpiUtGetEventName (Event), Event));
+    }
+
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiRemoveFixedEventHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiInstallGpeHandler
+ *
+ * PARAMETERS:  GpeDevice       - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              GpeNumber       - The GPE number within the GPE block
+ *              Type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              Address         - Address of the handler
+ *              Context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiInstallGpeHandler (
+    ACPI_HANDLE             GpeDevice,
+    UINT32                  GpeNumber,
+    UINT32                  Type,
+    ACPI_GPE_HANDLER        Address,
+    void                    *Context)
+{
+    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
+    ACPI_GPE_HANDLER_INFO   *Handler;
+    ACPI_STATUS             Status;
+    ACPI_CPU_FLAGS          Flags;
+
+
+    ACPI_FUNCTION_TRACE (AcpiInstallGpeHandler);
+
+
+    /* Parameter validation */
+
+    if ((!Address) || (Type & ~ACPI_GPE_XRUPT_TYPE_MASK))
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Allocate and init handler object (before lock) */
+
+    Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_HANDLER_INFO));
+    if (!Handler)
+    {
+        Status = AE_NO_MEMORY;
+        goto UnlockAndExit;
+    }
+
+    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
+
+    /* Ensure that we have a valid GPE number */
+
+    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
+    if (!GpeEventInfo)
+    {
+        Status = AE_BAD_PARAMETER;
+        goto FreeAndExit;
+    }
+
+    /* Make sure that there isn't a handler there already */
+
+    if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
+            ACPI_GPE_DISPATCH_HANDLER)
+    {
+        Status = AE_ALREADY_EXISTS;
+        goto FreeAndExit;
+    }
+
+    Handler->Address = Address;
+    Handler->Context = Context;
+    Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode;
+    Handler->OriginalFlags = (UINT8) (GpeEventInfo->Flags &
+        (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK));
+
+    /*
+     * If the GPE is associated with a method, it may have been enabled
+     * automatically during initialization, in which case it has to be
+     * disabled now to avoid spurious execution of the handler.
+     */
+    if (((Handler->OriginalFlags & ACPI_GPE_DISPATCH_METHOD) ||
+         (Handler->OriginalFlags & ACPI_GPE_DISPATCH_NOTIFY)) &&
+        GpeEventInfo->RuntimeCount)
+    {
+        Handler->OriginallyEnabled = TRUE;
+        (void) AcpiEvRemoveGpeReference (GpeEventInfo);
+
+        /* Sanity check of original type against new type */
+
+        if (Type != (UINT32) (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK))
+        {
+            ACPI_WARNING ((AE_INFO, "GPE type mismatch (level/edge)"));
+        }
+    }
+
+    /* Install the handler */
+
+    GpeEventInfo->Dispatch.Handler = Handler;
+
+    /* Setup up dispatch flags to indicate handler (vs. method/notify) */
+
+    GpeEventInfo->Flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+    GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_HANDLER);
+
+    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+
+
+UnlockAndExit:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+
+FreeAndExit:
+    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+    ACPI_FREE (Handler);
+    goto UnlockAndExit;
+}
+
+ACPI_EXPORT_SYMBOL (AcpiInstallGpeHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiRemoveGpeHandler
+ *
+ * PARAMETERS:  GpeDevice       - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              GpeNumber       - The event to remove a handler
+ *              Address         - Address of the handler
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a handler for a General Purpose AcpiEvent.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiRemoveGpeHandler (
+    ACPI_HANDLE             GpeDevice,
+    UINT32                  GpeNumber,
+    ACPI_GPE_HANDLER        Address)
+{
+    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
+    ACPI_GPE_HANDLER_INFO   *Handler;
+    ACPI_STATUS             Status;
+    ACPI_CPU_FLAGS          Flags;
+
+
+    ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler);
+
+
+    /* Parameter validation */
+
+    if (!Address)
+    {
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    /* Make sure all deferred GPE tasks are completed */
+
+    AcpiOsWaitEventsComplete ();
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
+
+    /* Ensure that we have a valid GPE number */
+
+    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
+    if (!GpeEventInfo)
+    {
+        Status = AE_BAD_PARAMETER;
+        goto UnlockAndExit;
+    }
+
+    /* Make sure that a handler is indeed installed */
+
+    if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) !=
+            ACPI_GPE_DISPATCH_HANDLER)
+    {
+        Status = AE_NOT_EXIST;
+        goto UnlockAndExit;
+    }
+
+    /* Make sure that the installed handler is the same */
+
+    if (GpeEventInfo->Dispatch.Handler->Address != Address)
+    {
+        Status = AE_BAD_PARAMETER;
+        goto UnlockAndExit;
+    }
+
+    /* Remove the handler */
+
+    Handler = GpeEventInfo->Dispatch.Handler;
+
+    /* Restore Method node (if any), set dispatch flags */
+
+    GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode;
+    GpeEventInfo->Flags &=
+        ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+    GpeEventInfo->Flags |= Handler->OriginalFlags;
+
+    /*
+     * If the GPE was previously associated with a method and it was
+     * enabled, it should be enabled at this point to restore the
+     * post-initialization configuration.
+     */
+    if ((Handler->OriginalFlags & ACPI_GPE_DISPATCH_METHOD) &&
+        Handler->OriginallyEnabled)
+    {
+        (void) AcpiEvAddGpeReference (GpeEventInfo);
+    }
+
+    /* Now we can free the handler object */
+
+    ACPI_FREE (Handler);
+
+
+UnlockAndExit:
+    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiRemoveGpeHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiAcquireGlobalLock
+ *
+ * PARAMETERS:  Timeout         - How long the caller is willing to wait
+ *              Handle          - Where the handle to the lock is returned
+ *                                (if acquired)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Acquire the ACPI Global Lock
+ *
+ * Note: Allows callers with the same thread ID to acquire the global lock
+ * multiple times. In other words, externally, the behavior of the global lock
+ * is identical to an AML mutex. On the first acquire, a new handle is
+ * returned. On any subsequent calls to acquire by the same thread, the same
+ * handle is returned.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiAcquireGlobalLock (
+    UINT16                  Timeout,
+    UINT32                  *Handle)
+{
+    ACPI_STATUS             Status;
+
+
+    if (!Handle)
+    {
+        return (AE_BAD_PARAMETER);
+    }
+
+    /* Must lock interpreter to prevent race conditions */
+
+    AcpiExEnterInterpreter ();
+
+    Status = AcpiExAcquireMutexObject (Timeout,
+                AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
+
+    if (ACPI_SUCCESS (Status))
+    {
+        /* Return the global lock handle (updated in AcpiEvAcquireGlobalLock) */
+
+        *Handle = AcpiGbl_GlobalLockHandle;
+    }
+
+    AcpiExExitInterpreter ();
+    return (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiAcquireGlobalLock)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiReleaseGlobalLock
+ *
+ * PARAMETERS:  Handle      - Returned from AcpiAcquireGlobalLock
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiReleaseGlobalLock (
+    UINT32                  Handle)
+{
+    ACPI_STATUS             Status;
+
+
+    if (!Handle || (Handle != AcpiGbl_GlobalLockHandle))
+    {
+        return (AE_NOT_ACQUIRED);
+    }
+
+    Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
+    return (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiReleaseGlobalLock)
+
+#endif /* !ACPI_REDUCED_HARDWARE */
