+++ /dev/null
-/******************************************************************************
- *
- * Module Name: evxface - External interfaces for ACPI events
- *
- *****************************************************************************/
-
-/******************************************************************************
- *
- * 1. Copyright Notice
- *
- * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
- * All rights reserved.
- *
- * 2. License
- *
- * 2.1. This is your license from Intel Corp. under its intellectual property
- * rights. You may have additional license terms from the party that provided
- * you this software, covering your right to use that party's intellectual
- * property rights.
- *
- * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
- * copy of the source code appearing in this file ("Covered Code") an
- * irrevocable, perpetual, worldwide license under Intel's copyrights in the
- * base code distributed originally by Intel ("Original Intel Code") to copy,
- * make derivatives, distribute, use and display any portion of the Covered
- * Code in any form, with the right to sublicense such rights; and
- *
- * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
- * license (with the right to sublicense), under only those claims of Intel
- * patents that are infringed by the Original Intel Code, to make, use, sell,
- * offer to sell, and import the Covered Code and derivative works thereof
- * solely to the minimum extent necessary to exercise the above copyright
- * license, and in no event shall the patent license extend to any additions
- * to or modifications of the Original Intel Code. No other license or right
- * is granted directly or by implication, estoppel or otherwise;
- *
- * The above copyright and patent license is granted only if the following
- * conditions are met:
- *
- * 3. Conditions
- *
- * 3.1. Redistribution of Source with Rights to Further Distribute Source.
- * Redistribution of source code of any substantial portion of the Covered
- * Code or modification with rights to further distribute source must include
- * the above Copyright Notice, the above License, this list of Conditions,
- * and the following Disclaimer and Export Compliance provision. In addition,
- * Licensee must cause all Covered Code to which Licensee contributes to
- * contain a file documenting the changes Licensee made to create that Covered
- * Code and the date of any change. Licensee must include in that file the
- * documentation of any changes made by any predecessor Licensee. Licensee
- * must include a prominent statement that the modification is derived,
- * directly or indirectly, from Original Intel Code.
- *
- * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
- * Redistribution of source code of any substantial portion of the Covered
- * Code or modification without rights to further distribute source must
- * include the following Disclaimer and Export Compliance provision in the
- * documentation and/or other materials provided with distribution. In
- * addition, Licensee may not authorize further sublicense of source of any
- * portion of the Covered Code, and must include terms to the effect that the
- * license from Licensee to its licensee is limited to the intellectual
- * property embodied in the software Licensee provides to its licensee, and
- * not to intellectual property embodied in modifications its licensee may
- * make.
- *
- * 3.3. Redistribution of Executable. Redistribution in executable form of any
- * substantial portion of the Covered Code or modification must reproduce the
- * above Copyright Notice, and the following Disclaimer and Export Compliance
- * provision in the documentation and/or other materials provided with the
- * distribution.
- *
- * 3.4. Intel retains all right, title, and interest in and to the Original
- * Intel Code.
- *
- * 3.5. Neither the name Intel nor any other trademark owned or controlled by
- * Intel shall be used in advertising or otherwise to promote the sale, use or
- * other dealings in products derived from or relating to the Covered Code
- * without prior written authorization from Intel.
- *
- * 4. Disclaimer and Export Compliance
- *
- * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
- * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
- * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
- * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
- * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
- * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
- * PARTICULAR PURPOSE.
- *
- * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
- * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
- * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
- * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
- * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
- * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
- * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
- * LIMITED REMEDY.
- *
- * 4.3. Licensee shall not export, either directly or indirectly, any of this
- * software or system incorporating such software without first obtaining any
- * required license or other approval from the U. S. Department of Commerce or
- * any other agency or department of the United States Government. In the
- * event Licensee exports any such software from the United States or
- * re-exports any such software from a foreign destination, Licensee shall
- * ensure that the distribution and export/re-export of the software is in
- * compliance with all laws, regulations, orders, or other restrictions of the
- * U.S. Export Administration Regulations. Licensee agrees that neither it nor
- * any of its subsidiaries will export/re-export any technical data, process,
- * software, or service, directly or indirectly, to any country for which the
- * United States government or any agency thereof requires an export license,
- * other governmental approval, or letter of assurance, without first obtaining
- * such license, approval or letter.
- *
- *****************************************************************************/
-
-
-#define __EVXFACE_C__
-
-#include "acpi.h"
-#include "accommon.h"
-#include "acnamesp.h"
-#include "acevents.h"
-#include "acinterp.h"
-
-#define _COMPONENT ACPI_EVENTS
- ACPI_MODULE_NAME ("evxface")
-
-
-/*******************************************************************************
- *
- * 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)
-
-
-/*******************************************************************************
- *
- * 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);
- }
-
- /* Don't allow two handlers. */
-
- if (NULL != 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 %X", Event));
-
- /* Remove the handler */
-
- AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
- AcpiGbl_FixedEventHandlers[Event].Context = NULL;
- }
- else
- {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Enabled fixed event %X, Handler=%p\n", 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 write to fixed event enable register %X", Event));
- }
- else
- {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Disabled fixed event %X\n", Event));
- }
-
- (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
- return_ACPI_STATUS (Status);
-}
-
-ACPI_EXPORT_SYMBOL (AcpiRemoveFixedEventHandler)
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiInstallNotifyHandler
- *
- * PARAMETERS: Device - The device for which notifies will be handled
- * HandlerType - The type of handler:
- * ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
- * ACPI_DEVICE_NOTIFY: DriverHandler (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 notifies on an ACPI device
- *
- ******************************************************************************/
-
-ACPI_STATUS
-AcpiInstallNotifyHandler (
- ACPI_HANDLE Device,
- UINT32 HandlerType,
- ACPI_NOTIFY_HANDLER Handler,
- void *Context)
-{
- ACPI_OPERAND_OBJECT *ObjDesc;
- ACPI_OPERAND_OBJECT *NotifyObj;
- ACPI_NAMESPACE_NODE *Node;
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE (AcpiInstallNotifyHandler);
-
-
- /* Parameter validation */
-
- if ((!Device) ||
- (!Handler) ||
- (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);
- }
-
- /* Convert and validate the device handle */
-
- Node = AcpiNsValidateHandle (Device);
- if (!Node)
- {
- Status = AE_BAD_PARAMETER;
- goto UnlockAndExit;
- }
-
- /*
- * 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 <external> global handler can be regsitered (per notify type).
- */
- if (Device == ACPI_ROOT_OBJECT)
- {
- /* Make sure the handler is not already installed */
-
- if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
- AcpiGbl_SystemNotify.Handler) ||
- ((HandlerType & ACPI_DEVICE_NOTIFY) &&
- AcpiGbl_DeviceNotify.Handler))
- {
- Status = AE_ALREADY_EXISTS;
- goto UnlockAndExit;
- }
-
- if (HandlerType & ACPI_SYSTEM_NOTIFY)
- {
- AcpiGbl_SystemNotify.Node = Node;
- AcpiGbl_SystemNotify.Handler = Handler;
- AcpiGbl_SystemNotify.Context = Context;
- }
-
- if (HandlerType & ACPI_DEVICE_NOTIFY)
- {
- AcpiGbl_DeviceNotify.Node = Node;
- AcpiGbl_DeviceNotify.Handler = Handler;
- AcpiGbl_DeviceNotify.Context = Context;
- }
-
- /* Global notify handler installed */
- }
-
- /*
- * All Other Objects:
- * Caller will only receive notifications specific to the target object.
- * Note that only certain object types can receive notifications.
- */
- else
- {
- /* Notifies allowed on this object? */
-
- if (!AcpiEvIsNotifyObject (Node))
- {
- Status = AE_TYPE;
- goto UnlockAndExit;
- }
-
- /* Check for an existing internal object */
-
- ObjDesc = AcpiNsGetAttachedObject (Node);
- if (ObjDesc)
- {
- /* Object exists - make sure there's no handler */
-
- if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
- ObjDesc->CommonNotify.SystemNotify) ||
- ((HandlerType & ACPI_DEVICE_NOTIFY) &&
- ObjDesc->CommonNotify.DeviceNotify))
- {
- Status = AE_ALREADY_EXISTS;
- goto UnlockAndExit;
- }
- }
- else
- {
- /* Create a new object */
-
- ObjDesc = AcpiUtCreateInternalObject (Node->Type);
- if (!ObjDesc)
- {
- Status = AE_NO_MEMORY;
- goto UnlockAndExit;
- }
-
- /* Attach new object to the Node */
-
- Status = AcpiNsAttachObject (Device, ObjDesc, Node->Type);
-
- /* Remove local reference to the object */
-
- AcpiUtRemoveReference (ObjDesc);
- if (ACPI_FAILURE (Status))
- {
- goto UnlockAndExit;
- }
- }
-
- /* Install the handler */
-
- NotifyObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_NOTIFY);
- if (!NotifyObj)
- {
- Status = AE_NO_MEMORY;
- goto UnlockAndExit;
- }
-
- NotifyObj->Notify.Node = Node;
- NotifyObj->Notify.Handler = Handler;
- NotifyObj->Notify.Context = Context;
-
- if (HandlerType & ACPI_SYSTEM_NOTIFY)
- {
- ObjDesc->CommonNotify.SystemNotify = NotifyObj;
- }
-
- if (HandlerType & ACPI_DEVICE_NOTIFY)
- {
- ObjDesc->CommonNotify.DeviceNotify = NotifyObj;
- }
-
- if (HandlerType == ACPI_ALL_NOTIFY)
- {
- /* Extra ref if installed in both */
-
- AcpiUtAddReference (NotifyObj);
- }
- }
-
-
-UnlockAndExit:
- (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
- return_ACPI_STATUS (Status);
-}
-
-ACPI_EXPORT_SYMBOL (AcpiInstallNotifyHandler)
-
-
-/*******************************************************************************
- *
- * FUNCTION: AcpiRemoveNotifyHandler
- *
- * PARAMETERS: Device - The device for which notifies will be handled
- * HandlerType - The type of handler:
- * ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
- * ACPI_DEVICE_NOTIFY: DriverHandler (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_OPERAND_OBJECT *NotifyObj;
- ACPI_OPERAND_OBJECT *ObjDesc;
- ACPI_NAMESPACE_NODE *Node;
- ACPI_STATUS Status;
-
-
- ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler);
-
-
- /* Parameter validation */
-
- if ((!Device) ||
- (!Handler) ||
- (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);
- }
-
- /* Convert and validate the device handle */
-
- Node = AcpiNsValidateHandle (Device);
- if (!Node)
- {
- Status = AE_BAD_PARAMETER;
- goto UnlockAndExit;
- }
-
- /* Root Object */
-
- if (Device == ACPI_ROOT_OBJECT)
- {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Removing notify handler for namespace root object\n"));
-
- if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
- !AcpiGbl_SystemNotify.Handler) ||
- ((HandlerType & ACPI_DEVICE_NOTIFY) &&
- !AcpiGbl_DeviceNotify.Handler))
- {
- Status = AE_NOT_EXIST;
- goto UnlockAndExit;
- }
-
- if (HandlerType & ACPI_SYSTEM_NOTIFY)
- {
- AcpiGbl_SystemNotify.Node = NULL;
- AcpiGbl_SystemNotify.Handler = NULL;
- AcpiGbl_SystemNotify.Context = NULL;
- }
-
- if (HandlerType & ACPI_DEVICE_NOTIFY)
- {
- AcpiGbl_DeviceNotify.Node = NULL;
- AcpiGbl_DeviceNotify.Handler = NULL;
- AcpiGbl_DeviceNotify.Context = NULL;
- }
- }
-
- /* All Other Objects */
-
- else
- {
- /* Notifies allowed on this object? */
-
- if (!AcpiEvIsNotifyObject (Node))
- {
- Status = AE_TYPE;
- goto UnlockAndExit;
- }
-
- /* Check for an existing internal object */
-
- ObjDesc = AcpiNsGetAttachedObject (Node);
- if (!ObjDesc)
- {
- Status = AE_NOT_EXIST;
- goto UnlockAndExit;
- }
-
- /* Object exists - make sure there's an existing handler */
-
- if (HandlerType & ACPI_SYSTEM_NOTIFY)
- {
- NotifyObj = ObjDesc->CommonNotify.SystemNotify;
- if (!NotifyObj)
- {
- Status = AE_NOT_EXIST;
- goto UnlockAndExit;
- }
-
- if (NotifyObj->Notify.Handler != Handler)
- {
- Status = AE_BAD_PARAMETER;
- goto UnlockAndExit;
- }
-
- /* Remove the handler */
-
- ObjDesc->CommonNotify.SystemNotify = NULL;
- AcpiUtRemoveReference (NotifyObj);
- }
-
- if (HandlerType & ACPI_DEVICE_NOTIFY)
- {
- NotifyObj = ObjDesc->CommonNotify.DeviceNotify;
- if (!NotifyObj)
- {
- Status = AE_NOT_EXIST;
- goto UnlockAndExit;
- }
-
- if (NotifyObj->Notify.Handler != Handler)
- {
- Status = AE_BAD_PARAMETER;
- goto UnlockAndExit;
- }
-
- /* Remove the handler */
-
- ObjDesc->CommonNotify.DeviceNotify = NULL;
- AcpiUtRemoveReference (NotifyObj);
- }
- }
-
-
-UnlockAndExit:
- (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
- return_ACPI_STATUS (Status);
-}
-
-ACPI_EXPORT_SYMBOL (AcpiRemoveNotifyHandler)
-
-
-/*******************************************************************************
- *
- * 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_EVENT_HANDLER Address,
- void *Context)
-{
- ACPI_GPE_EVENT_INFO *GpeEventInfo;
- ACPI_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);
- }
-
- /* Ensure that we have a valid GPE number */
-
- GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
- if (!GpeEventInfo)
- {
- Status = AE_BAD_PARAMETER;
- goto UnlockAndExit;
- }
-
- /* 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 UnlockAndExit;
- }
-
- /* Allocate and init handler object */
-
- Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_HANDLER_INFO));
- if (!Handler)
- {
- Status = AE_NO_MEMORY;
- goto UnlockAndExit;
- }
-
- Handler->Address = Address;
- Handler->Context = Context;
- Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode;
-
- /* Disable the GPE before installing the handler */
-
- Status = AcpiEvDisableGpe (GpeEventInfo);
- if (ACPI_FAILURE (Status))
- {
- goto UnlockAndExit;
- }
-
- /* Install the handler */
-
- Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
- GpeEventInfo->Dispatch.Handler = Handler;
-
- /* Setup up dispatch flags to indicate handler (vs. method) */
-
- 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);
-}
-
-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_EVENT_HANDLER Address)
-{
- ACPI_GPE_EVENT_INFO *GpeEventInfo;
- ACPI_HANDLER_INFO *Handler;
- ACPI_STATUS Status;
- ACPI_CPU_FLAGS Flags;
-
-
- ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler);
-
-
- /* Parameter validation */
-
- if (!Address)
- {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
- if (ACPI_FAILURE (Status))
- {
- return_ACPI_STATUS (Status);
- }
-
- /* 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;
- }
-
- /* Disable the GPE before removing the handler */
-
- Status = AcpiEvDisableGpe (GpeEventInfo);
- if (ACPI_FAILURE (Status))
- {
- goto UnlockAndExit;
- }
-
- /* Remove the handler */
-
- Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
- Handler = GpeEventInfo->Dispatch.Handler;
-
- /* Restore Method node (if any), set dispatch flags */
-
- GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode;
- GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
- if (Handler->MethodNode)
- {
- GpeEventInfo->Flags |= ACPI_GPE_DISPATCH_METHOD;
- }
- AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
-
- /* Now we can free the handler object */
-
- ACPI_FREE (Handler);
-
-
-UnlockAndExit:
- (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)
-
projects / l4.git / blobdiff