ACPICA: create acpica/ directory

also, delete sleep/ and delete ACPI_CFLAGS from Makefile

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 821 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
new file mode 100644
index 000000000000..3b6a069f5b06
--- /dev/null
+++ b/drivers/acpi/acpica/evxface.c
@@ -0,0 +1,821 @@
+/******************************************************************************
+ *
+ * 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)