diff options
Diffstat (limited to 'drivers/acpi/events/evxface.c')
| -rw-r--r-- | drivers/acpi/events/evxface.c | 821 |
1 files changed, 0 insertions, 821 deletions
diff --git a/drivers/acpi/events/evxface.c b/drivers/acpi/events/evxface.c deleted file mode 100644 index 3b6a069f5b0..00000000000 --- a/drivers/acpi/events/evxface.c +++ /dev/null @@ -1,821 +0,0 @@ -/****************************************************************************** - * - * Module Name: evxface - External interfaces for ACPI events - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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. - */ - -#include <acpi/acpi.h> -#include <acpi/accommon.h> -#include <acpi/acnamesp.h> -#include <acpi/acevents.h> -#include <acpi/acinterp.h> - -#define _COMPONENT ACPI_EVENTS -ACPI_MODULE_NAME("evxface") - -/******************************************************************************* - * - * FUNCTION: acpi_install_exception_handler - * - * PARAMETERS: Handler - Pointer to the handler function for the - * event - * - * RETURN: Status - * - * DESCRIPTION: Saves the pointer to the handler function - * - ******************************************************************************/ -#ifdef ACPI_FUTURE_USAGE -acpi_status acpi_install_exception_handler(acpi_exception_handler handler) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_install_exception_handler); - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Don't allow two handlers. */ - - if (acpi_gbl_exception_handler) { - status = AE_ALREADY_EXISTS; - goto cleanup; - } - - /* Install the handler */ - - acpi_gbl_exception_handler = handler; - - cleanup: - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) -#endif /* ACPI_FUTURE_USAGE */ -/******************************************************************************* - * - * FUNCTION: acpi_install_fixed_event_handler - * - * 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 -acpi_install_fixed_event_handler(u32 event, - acpi_event_handler handler, void *context) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler); - - /* Parameter validation */ - - if (event > ACPI_EVENT_MAX) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Don't allow two handlers. */ - - if (NULL != acpi_gbl_fixed_event_handlers[event].handler) { - status = AE_ALREADY_EXISTS; - goto cleanup; - } - - /* Install the handler before enabling the event */ - - acpi_gbl_fixed_event_handlers[event].handler = handler; - acpi_gbl_fixed_event_handlers[event].context = context; - - status = acpi_clear_event(event); - if (ACPI_SUCCESS(status)) - status = acpi_enable_event(event, 0); - if (ACPI_FAILURE(status)) { - ACPI_WARNING((AE_INFO, "Could not enable fixed event %X", - event)); - - /* Remove the handler */ - - acpi_gbl_fixed_event_handlers[event].handler = NULL; - acpi_gbl_fixed_event_handlers[event].context = NULL; - } else { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Enabled fixed event %X, Handler=%p\n", event, - handler)); - } - - cleanup: - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler) - -/******************************************************************************* - * - * FUNCTION: acpi_remove_fixed_event_handler - * - * PARAMETERS: Event - Event type to disable. - * Handler - Address of the handler - * - * RETURN: Status - * - * DESCRIPTION: Disables the event and unregisters the event handler. - * - ******************************************************************************/ -acpi_status -acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) -{ - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler); - - /* Parameter validation */ - - if (event > ACPI_EVENT_MAX) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Disable the event before removing the handler */ - - status = acpi_disable_event(event, 0); - - /* Always Remove the handler */ - - acpi_gbl_fixed_event_handlers[event].handler = NULL; - acpi_gbl_fixed_event_handlers[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)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) - -/******************************************************************************* - * - * FUNCTION: acpi_install_notify_handler - * - * PARAMETERS: Device - The device for which notifies will be handled - * handler_type - The type of handler: - * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) - * ACPI_DEVICE_NOTIFY: driver_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 notifies on an ACPI device - * - ******************************************************************************/ -acpi_status -acpi_install_notify_handler(acpi_handle device, - u32 handler_type, - acpi_notify_handler handler, void *context) -{ - union acpi_operand_object *obj_desc; - union acpi_operand_object *notify_obj; - struct acpi_namespace_node *node; - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_install_notify_handler); - - /* Parameter validation */ - - if ((!device) || - (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Convert and validate the device handle */ - - node = acpi_ns_map_handle_to_node(device); - if (!node) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - - /* - * 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 (((handler_type & ACPI_SYSTEM_NOTIFY) && - acpi_gbl_system_notify.handler) || - ((handler_type & ACPI_DEVICE_NOTIFY) && - acpi_gbl_device_notify.handler)) { - status = AE_ALREADY_EXISTS; - goto unlock_and_exit; - } - - if (handler_type & ACPI_SYSTEM_NOTIFY) { - acpi_gbl_system_notify.node = node; - acpi_gbl_system_notify.handler = handler; - acpi_gbl_system_notify.context = context; - } - - if (handler_type & ACPI_DEVICE_NOTIFY) { - acpi_gbl_device_notify.node = node; - acpi_gbl_device_notify.handler = handler; - acpi_gbl_device_notify.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 (!acpi_ev_is_notify_object(node)) { - status = AE_TYPE; - goto unlock_and_exit; - } - - /* Check for an existing internal object */ - - obj_desc = acpi_ns_get_attached_object(node); - if (obj_desc) { - - /* Object exists - make sure there's no handler */ - - if (((handler_type & ACPI_SYSTEM_NOTIFY) && - obj_desc->common_notify.system_notify) || - ((handler_type & ACPI_DEVICE_NOTIFY) && - obj_desc->common_notify.device_notify)) { - status = AE_ALREADY_EXISTS; - goto unlock_and_exit; - } - } else { - /* Create a new object */ - - obj_desc = acpi_ut_create_internal_object(node->type); - if (!obj_desc) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - /* Attach new object to the Node */ - - status = - acpi_ns_attach_object(device, obj_desc, node->type); - - /* Remove local reference to the object */ - - acpi_ut_remove_reference(obj_desc); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - } - - /* Install the handler */ - - notify_obj = - acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); - if (!notify_obj) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - notify_obj->notify.node = node; - notify_obj->notify.handler = handler; - notify_obj->notify.context = context; - - if (handler_type & ACPI_SYSTEM_NOTIFY) { - obj_desc->common_notify.system_notify = notify_obj; - } - - if (handler_type & ACPI_DEVICE_NOTIFY) { - obj_desc->common_notify.device_notify = notify_obj; - } - - if (handler_type == ACPI_ALL_NOTIFY) { - - /* Extra ref if installed in both */ - - acpi_ut_add_reference(notify_obj); - } - } - - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_install_notify_handler) - -/******************************************************************************* - * - * FUNCTION: acpi_remove_notify_handler - * - * PARAMETERS: Device - The device for which notifies will be handled - * handler_type - The type of handler: - * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) - * ACPI_DEVICE_NOTIFY: driver_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 -acpi_remove_notify_handler(acpi_handle device, - u32 handler_type, acpi_notify_handler handler) -{ - union acpi_operand_object *notify_obj; - union acpi_operand_object *obj_desc; - struct acpi_namespace_node *node; - acpi_status status; - - ACPI_FUNCTION_TRACE(acpi_remove_notify_handler); - - /* Parameter validation */ - - if ((!device) || - (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { - status = AE_BAD_PARAMETER; - goto exit; - } - - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* Convert and validate the device handle */ - - node = acpi_ns_map_handle_to_node(device); - if (!node) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - - /* Root Object */ - - if (device == ACPI_ROOT_OBJECT) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Removing notify handler for namespace root object\n")); - - if (((handler_type & ACPI_SYSTEM_NOTIFY) && - !acpi_gbl_system_notify.handler) || - ((handler_type & ACPI_DEVICE_NOTIFY) && - !acpi_gbl_device_notify.handler)) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } - - /* Make sure all deferred tasks are completed */ - - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } - - if (handler_type & ACPI_SYSTEM_NOTIFY) { - acpi_gbl_system_notify.node = NULL; - acpi_gbl_system_notify.handler = NULL; - acpi_gbl_system_notify.context = NULL; - } - - if (handler_type & ACPI_DEVICE_NOTIFY) { - acpi_gbl_device_notify.node = NULL; - acpi_gbl_device_notify.handler = NULL; - acpi_gbl_device_notify.context = NULL; - } - } - - /* All Other Objects */ - - else { - /* Notifies allowed on this object? */ - - if (!acpi_ev_is_notify_object(node)) { - status = AE_TYPE; - goto unlock_and_exit; - } - - /* Check for an existing internal object */ - - obj_desc = acpi_ns_get_attached_object(node); - if (!obj_desc) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } - - /* Object exists - make sure there's an existing handler */ - - if (handler_type & ACPI_SYSTEM_NOTIFY) { - notify_obj = obj_desc->common_notify.system_notify; - if (!notify_obj) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } - - if (notify_obj->notify.handler != handler) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - /* Make sure all deferred tasks are completed */ - - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* Remove the handler */ - obj_desc->common_notify.system_notify = NULL; - acpi_ut_remove_reference(notify_obj); - } - - if (handler_type & ACPI_DEVICE_NOTIFY) { - notify_obj = obj_desc->common_notify.device_notify; - if (!notify_obj) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } - - if (notify_obj->notify.handler != handler) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - /* Make sure all deferred tasks are completed */ - - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* Remove the handler */ - obj_desc->common_notify.device_notify = NULL; - acpi_ut_remove_reference(notify_obj); - } - } - - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - exit: - if (ACPI_FAILURE(status)) - ACPI_EXCEPTION((AE_INFO, status, "Removing notify handler")); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) - -/******************************************************************************* - * - * FUNCTION: acpi_install_gpe_handler - * - * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT - * defined GPEs) - * gpe_number - 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 -acpi_install_gpe_handler(acpi_handle gpe_device, - u32 gpe_number, - u32 type, acpi_event_handler address, void *context) -{ - struct acpi_gpe_event_info *gpe_event_info; - struct acpi_handler_info *handler; - acpi_status status; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(acpi_install_gpe_handler); - - /* Parameter validation */ - - if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) { - status = AE_BAD_PARAMETER; - goto exit; - } - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - goto exit; - } - - /* Ensure that we have a valid GPE number */ - - gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); - if (!gpe_event_info) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - - /* Make sure that there isn't a handler there already */ - - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == - ACPI_GPE_DISPATCH_HANDLER) { - status = AE_ALREADY_EXISTS; - goto unlock_and_exit; - } - - /* Allocate and init handler object */ - - handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info)); - if (!handler) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - handler->address = address; - handler->context = context; - handler->method_node = gpe_event_info->dispatch.method_node; - - /* Disable the GPE before installing the handler */ - - status = acpi_ev_disable_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - /* Install the handler */ - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - gpe_event_info->dispatch.handler = handler; - - /* Setup up dispatch flags to indicate handler (vs. method) */ - - gpe_event_info->flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); /* Clear bits */ - gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER); - - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - exit: - if (ACPI_FAILURE(status)) - ACPI_EXCEPTION((AE_INFO, status, - "Installing notify handler failed")); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) - -/******************************************************************************* - * - * FUNCTION: acpi_remove_gpe_handler - * - * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT - * defined GPEs) - * gpe_number - The event to remove a handler - * Address - Address of the handler - * - * RETURN: Status - * - * DESCRIPTION: Remove a handler for a General Purpose acpi_event. - * - ******************************************************************************/ -acpi_status -acpi_remove_gpe_handler(acpi_handle gpe_device, - u32 gpe_number, acpi_event_handler address) -{ - struct acpi_gpe_event_info *gpe_event_info; - struct acpi_handler_info *handler; - acpi_status status; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler); - - /* Parameter validation */ - - if (!address) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Ensure that we have a valid GPE number */ - - gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); - if (!gpe_event_info) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - - /* Make sure that a handler is indeed installed */ - - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != - ACPI_GPE_DISPATCH_HANDLER) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } - - /* Make sure that the installed handler is the same */ - - if (gpe_event_info->dispatch.handler->address != address) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - - /* Disable the GPE before removing the handler */ - - status = acpi_ev_disable_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - /* Make sure all deferred tasks are completed */ - - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Remove the handler */ - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - handler = gpe_event_info->dispatch.handler; - - /* Restore Method node (if any), set dispatch flags */ - - gpe_event_info->dispatch.method_node = handler->method_node; - gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */ - if (handler->method_node) { - gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD; - } - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - - /* Now we can free the handler object */ - - ACPI_FREE(handler); - - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler) - -/******************************************************************************* - * - * FUNCTION: acpi_acquire_global_lock - * - * 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 acpi_acquire_global_lock(u16 timeout, u32 * handle) -{ - acpi_status status; - - if (!handle) { - return (AE_BAD_PARAMETER); - } - - /* Must lock interpreter to prevent race conditions */ - - acpi_ex_enter_interpreter(); - - status = acpi_ex_acquire_mutex_object(timeout, - acpi_gbl_global_lock_mutex, - acpi_os_get_thread_id()); - - if (ACPI_SUCCESS(status)) { - - /* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */ - - *handle = acpi_gbl_global_lock_handle; - } - - acpi_ex_exit_interpreter(); - return (status); -} - -ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock) - -/******************************************************************************* - * - * FUNCTION: acpi_release_global_lock - * - * PARAMETERS: Handle - Returned from acpi_acquire_global_lock - * - * RETURN: Status - * - * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. - * - ******************************************************************************/ -acpi_status acpi_release_global_lock(u32 handle) -{ - acpi_status status; - - if (!handle || (handle != acpi_gbl_global_lock_handle)) { - return (AE_NOT_ACQUIRED); - } - - status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex); - return (status); -} - -ACPI_EXPORT_SYMBOL(acpi_release_global_lock) |