| 0,0 → 1,967 |
|---|
| /****************************************************************************** |
| * |
| * Module Name: evxface - External interfaces for ACPI events |
| * |
| *****************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 1. Copyright Notice |
| * |
| * Some or all of this work - Copyright (c) 1999 - 2010, 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 0x%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 0x%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) |
| |