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, 1070 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c
new file mode 100644
index 000000000000..7346093f43ed
--- /dev/null
+++ b/drivers/acpi/acpica/evregion.c
@@ -0,0 +1,1070 @@
+/******************************************************************************
+ *
+ * Module Name: evregion - ACPI address_space (op_region) handler dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acevents.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evregion")
+
+/* Local prototypes */
+static acpi_status
+acpi_ev_reg_run(acpi_handle obj_handle,
+		u32 level, void *context, void **return_value);
+
+static acpi_status
+acpi_ev_install_handler(acpi_handle obj_handle,
+			u32 level, void *context, void **return_value);
+
+/* These are the address spaces that will get default handlers */
+
+#define ACPI_NUM_DEFAULT_SPACES     4
+
+static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = {
+	ACPI_ADR_SPACE_SYSTEM_MEMORY,
+	ACPI_ADR_SPACE_SYSTEM_IO,
+	ACPI_ADR_SPACE_PCI_CONFIG,
+	ACPI_ADR_SPACE_DATA_TABLE
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_region_handlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Installs the core subsystem default address space handlers.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_install_region_handlers(void)
+{
+	acpi_status status;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(ev_install_region_handlers);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * All address spaces (PCI Config, EC, SMBus) are scope dependent and
+	 * registration must occur for a specific device.
+	 *
+	 * In the case of the system memory and IO address spaces there is
+	 * currently no device associated with the address space. For these we
+	 * use the root.
+	 *
+	 * We install the default PCI config space handler at the root so that
+	 * this space is immediately available even though the we have not
+	 * enumerated all the PCI Root Buses yet. This is to conform to the ACPI
+	 * specification which states that the PCI config space must be always
+	 * available -- even though we are nowhere near ready to find the PCI root
+	 * buses at this point.
+	 *
+	 * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
+	 * has already been installed (via acpi_install_address_space_handler).
+	 * Similar for AE_SAME_HANDLER.
+	 */
+	for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
+		status = acpi_ev_install_space_handler(acpi_gbl_root_node,
+						       acpi_gbl_default_address_spaces
+						       [i],
+						       ACPI_DEFAULT_HANDLER,
+						       NULL, NULL);
+		switch (status) {
+		case AE_OK:
+		case AE_SAME_HANDLER:
+		case AE_ALREADY_EXISTS:
+
+			/* These exceptions are all OK */
+
+			status = AE_OK;
+			break;
+
+		default:
+
+			goto unlock_and_exit;
+		}
+	}
+
+      unlock_and_exit:
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_op_regions
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute _REG methods for all Operation Regions that have
+ *              an installed default region handler.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_initialize_op_regions(void)
+{
+	acpi_status status;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(ev_initialize_op_regions);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Run the _REG methods for op_regions in each default address space */
+
+	for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
+		/*
+		 * TBD: Make sure handler is the DEFAULT handler, otherwise
+		 * _REG will have already been run.
+		 */
+		status = acpi_ev_execute_reg_methods(acpi_gbl_root_node,
+						     acpi_gbl_default_address_spaces
+						     [i]);
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_execute_reg_method
+ *
+ * PARAMETERS:  region_obj          - Region object
+ *              Function            - Passed to _REG: On (1) or Off (0)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute _REG method for a region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function)
+{
+	struct acpi_evaluate_info *info;
+	union acpi_operand_object *args[3];
+	union acpi_operand_object *region_obj2;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_execute_reg_method);
+
+	region_obj2 = acpi_ns_get_secondary_object(region_obj);
+	if (!region_obj2) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	if (region_obj2->extra.method_REG == NULL) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Allocate and initialize the evaluation information block */
+
+	info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
+	if (!info) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	info->prefix_node = region_obj2->extra.method_REG;
+	info->pathname = NULL;
+	info->parameters = args;
+	info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+	/*
+	 * The _REG method has two arguments:
+	 *
+	 * Arg0 - Integer:
+	 *  Operation region space ID Same value as region_obj->Region.space_id
+	 *
+	 * Arg1 - Integer:
+	 *  connection status 1 for connecting the handler, 0 for disconnecting
+	 *  the handler (Passed as a parameter)
+	 */
+	args[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+	if (!args[0]) {
+		status = AE_NO_MEMORY;
+		goto cleanup1;
+	}
+
+	args[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+	if (!args[1]) {
+		status = AE_NO_MEMORY;
+		goto cleanup2;
+	}
+
+	/* Setup the parameter objects */
+
+	args[0]->integer.value = region_obj->region.space_id;
+	args[1]->integer.value = function;
+	args[2] = NULL;
+
+	/* Execute the method, no return value */
+
+	ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
+			(ACPI_TYPE_METHOD, info->prefix_node, NULL));
+
+	status = acpi_ns_evaluate(info);
+	acpi_ut_remove_reference(args[1]);
+
+      cleanup2:
+	acpi_ut_remove_reference(args[0]);
+
+      cleanup1:
+	ACPI_FREE(info);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_address_space_dispatch
+ *
+ * PARAMETERS:  region_obj          - Internal region object
+ *              Function            - Read or Write operation
+ *              Address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, 32, or 64)
+ *              Value               - Pointer to in or out value, must be
+ *                                    full 64-bit acpi_integer
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Dispatch an address space or operation region access to
+ *              a previously installed handler.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
+			       u32 function,
+			       acpi_physical_address address,
+			       u32 bit_width, acpi_integer * value)
+{
+	acpi_status status;
+	acpi_adr_space_handler handler;
+	acpi_adr_space_setup region_setup;
+	union acpi_operand_object *handler_desc;
+	union acpi_operand_object *region_obj2;
+	void *region_context = NULL;
+
+	ACPI_FUNCTION_TRACE(ev_address_space_dispatch);
+
+	region_obj2 = acpi_ns_get_secondary_object(region_obj);
+	if (!region_obj2) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	/* Ensure that there is a handler associated with this region */
+
+	handler_desc = region_obj->region.handler;
+	if (!handler_desc) {
+		ACPI_ERROR((AE_INFO,
+			    "No handler for Region [%4.4s] (%p) [%s]",
+			    acpi_ut_get_node_name(region_obj->region.node),
+			    region_obj,
+			    acpi_ut_get_region_name(region_obj->region.
+						    space_id)));
+
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	/*
+	 * It may be the case that the region has never been initialized.
+	 * Some types of regions require special init code
+	 */
+	if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
+
+		/* This region has not been initialized yet, do it */
+
+		region_setup = handler_desc->address_space.setup;
+		if (!region_setup) {
+
+			/* No initialization routine, exit with error */
+
+			ACPI_ERROR((AE_INFO,
+				    "No init routine for region(%p) [%s]",
+				    region_obj,
+				    acpi_ut_get_region_name(region_obj->region.
+							    space_id)));
+			return_ACPI_STATUS(AE_NOT_EXIST);
+		}
+
+		/*
+		 * We must exit the interpreter because the region setup will
+		 * potentially execute control methods (for example, the _REG method
+		 * for this region)
+		 */
+		acpi_ex_exit_interpreter();
+
+		status = region_setup(region_obj, ACPI_REGION_ACTIVATE,
+				      handler_desc->address_space.context,
+				      &region_context);
+
+		/* Re-enter the interpreter */
+
+		acpi_ex_enter_interpreter();
+
+		/* Check for failure of the Region Setup */
+
+		if (ACPI_FAILURE(status)) {
+			ACPI_EXCEPTION((AE_INFO, status,
+					"During region initialization: [%s]",
+					acpi_ut_get_region_name(region_obj->
+								region.
+								space_id)));
+			return_ACPI_STATUS(status);
+		}
+
+		/* Region initialization may have been completed by region_setup */
+
+		if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
+			region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE;
+
+			if (region_obj2->extra.region_context) {
+
+				/* The handler for this region was already installed */
+
+				ACPI_FREE(region_context);
+			} else {
+				/*
+				 * Save the returned context for use in all accesses to
+				 * this particular region
+				 */
+				region_obj2->extra.region_context =
+				    region_context;
+			}
+		}
+	}
+
+	/* We have everything we need, we can invoke the address space handler */
+
+	handler = handler_desc->address_space.handler;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+			  "Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
+			  &region_obj->region.handler->address_space, handler,
+			  ACPI_FORMAT_NATIVE_UINT(address),
+			  acpi_ut_get_region_name(region_obj->region.
+						  space_id)));
+
+	if (!(handler_desc->address_space.handler_flags &
+	      ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
+		/*
+		 * For handlers other than the default (supplied) handlers, we must
+		 * exit the interpreter because the handler *might* block -- we don't
+		 * know what it will do, so we can't hold the lock on the intepreter.
+		 */
+		acpi_ex_exit_interpreter();
+	}
+
+	/* Call the handler */
+
+	status = handler(function, address, bit_width, value,
+			 handler_desc->address_space.context,
+			 region_obj2->extra.region_context);
+
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]",
+				acpi_ut_get_region_name(region_obj->region.
+							space_id)));
+	}
+
+	if (!(handler_desc->address_space.handler_flags &
+	      ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
+		/*
+		 * We just returned from a non-default handler, we must re-enter the
+		 * interpreter
+		 */
+		acpi_ex_enter_interpreter();
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_detach_region
+ *
+ * PARAMETERS:  region_obj          - Region Object
+ *              acpi_ns_is_locked   - Namespace Region Already Locked?
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Break the association between the handler and the region
+ *              this is a two way association.
+ *
+ ******************************************************************************/
+
+void
+acpi_ev_detach_region(union acpi_operand_object *region_obj,
+		      u8 acpi_ns_is_locked)
+{
+	union acpi_operand_object *handler_obj;
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object **last_obj_ptr;
+	acpi_adr_space_setup region_setup;
+	void **region_context;
+	union acpi_operand_object *region_obj2;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_detach_region);
+
+	region_obj2 = acpi_ns_get_secondary_object(region_obj);
+	if (!region_obj2) {
+		return_VOID;
+	}
+	region_context = &region_obj2->extra.region_context;
+
+	/* Get the address handler from the region object */
+
+	handler_obj = region_obj->region.handler;
+	if (!handler_obj) {
+
+		/* This region has no handler, all done */
+
+		return_VOID;
+	}
+
+	/* Find this region in the handler's list */
+
+	obj_desc = handler_obj->address_space.region_list;
+	last_obj_ptr = &handler_obj->address_space.region_list;
+
+	while (obj_desc) {
+
+		/* Is this the correct Region? */
+
+		if (obj_desc == region_obj) {
+			ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+					  "Removing Region %p from address handler %p\n",
+					  region_obj, handler_obj));
+
+			/* This is it, remove it from the handler's list */
+
+			*last_obj_ptr = obj_desc->region.next;
+			obj_desc->region.next = NULL;	/* Must clear field */
+
+			if (acpi_ns_is_locked) {
+				status =
+				    acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+				if (ACPI_FAILURE(status)) {
+					return_VOID;
+				}
+			}
+
+			/* Now stop region accesses by executing the _REG method */
+
+			status = acpi_ev_execute_reg_method(region_obj, 0);
+			if (ACPI_FAILURE(status)) {
+				ACPI_EXCEPTION((AE_INFO, status,
+						"from region _REG, [%s]",
+						acpi_ut_get_region_name
+						(region_obj->region.space_id)));
+			}
+
+			if (acpi_ns_is_locked) {
+				status =
+				    acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+				if (ACPI_FAILURE(status)) {
+					return_VOID;
+				}
+			}
+
+			/*
+			 * If the region has been activated, call the setup handler with
+			 * the deactivate notification
+			 */
+			if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
+				region_setup = handler_obj->address_space.setup;
+				status =
+				    region_setup(region_obj,
+						 ACPI_REGION_DEACTIVATE,
+						 handler_obj->address_space.
+						 context, region_context);
+
+				/* Init routine may fail, Just ignore errors */
+
+				if (ACPI_FAILURE(status)) {
+					ACPI_EXCEPTION((AE_INFO, status,
+							"from region handler - deactivate, [%s]",
+							acpi_ut_get_region_name
+							(region_obj->region.
+							 space_id)));
+				}
+
+				region_obj->region.flags &=
+				    ~(AOPOBJ_SETUP_COMPLETE);
+			}
+
+			/*
+			 * Remove handler reference in the region
+			 *
+			 * NOTE: this doesn't mean that the region goes away, the region
+			 * is just inaccessible as indicated to the _REG method
+			 *
+			 * If the region is on the handler's list, this must be the
+			 * region's handler
+			 */
+			region_obj->region.handler = NULL;
+			acpi_ut_remove_reference(handler_obj);
+
+			return_VOID;
+		}
+
+		/* Walk the linked list of handlers */
+
+		last_obj_ptr = &obj_desc->region.next;
+		obj_desc = obj_desc->region.next;
+	}
+
+	/* If we get here, the region was not in the handler's region list */
+
+	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+			  "Cannot remove region %p from address handler %p\n",
+			  region_obj, handler_obj));
+
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_attach_region
+ *
+ * PARAMETERS:  handler_obj         - Handler Object
+ *              region_obj          - Region Object
+ *              acpi_ns_is_locked   - Namespace Region Already Locked?
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Create the association between the handler and the region
+ *              this is a two way association.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_attach_region(union acpi_operand_object *handler_obj,
+		      union acpi_operand_object *region_obj,
+		      u8 acpi_ns_is_locked)
+{
+
+	ACPI_FUNCTION_TRACE(ev_attach_region);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+			  "Adding Region [%4.4s] %p to address handler %p [%s]\n",
+			  acpi_ut_get_node_name(region_obj->region.node),
+			  region_obj, handler_obj,
+			  acpi_ut_get_region_name(region_obj->region.
+						  space_id)));
+
+	/* Link this region to the front of the handler's list */
+
+	region_obj->region.next = handler_obj->address_space.region_list;
+	handler_obj->address_space.region_list = region_obj;
+
+	/* Install the region's handler */
+
+	if (region_obj->region.handler) {
+		return_ACPI_STATUS(AE_ALREADY_EXISTS);
+	}
+
+	region_obj->region.handler = handler_obj;
+	acpi_ut_add_reference(handler_obj);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_handler
+ *
+ * PARAMETERS:  walk_namespace callback
+ *
+ * DESCRIPTION: This routine installs an address handler into objects that are
+ *              of type Region or Device.
+ *
+ *              If the Object is a Device, and the device has a handler of
+ *              the same type then the search is terminated in that branch.
+ *
+ *              This is because the existing handler is closer in proximity
+ *              to any more regions than the one we are trying to install.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ev_install_handler(acpi_handle obj_handle,
+			u32 level, void *context, void **return_value)
+{
+	union acpi_operand_object *handler_obj;
+	union acpi_operand_object *next_handler_obj;
+	union acpi_operand_object *obj_desc;
+	struct acpi_namespace_node *node;
+	acpi_status status;
+
+	ACPI_FUNCTION_NAME(ev_install_handler);
+
+	handler_obj = (union acpi_operand_object *)context;
+
+	/* Parameter validation */
+
+	if (!handler_obj) {
+		return (AE_OK);
+	}
+
+	/* Convert and validate the device handle */
+
+	node = acpi_ns_map_handle_to_node(obj_handle);
+	if (!node) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * We only care about regions and objects that are allowed to have
+	 * address space handlers
+	 */
+	if ((node->type != ACPI_TYPE_DEVICE) &&
+	    (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
+		return (AE_OK);
+	}
+
+	/* Check for an existing internal object */
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+
+		/* No object, just exit */
+
+		return (AE_OK);
+	}
+
+	/* Devices are handled different than regions */
+
+	if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) {
+
+		/* Check if this Device already has a handler for this address space */
+
+		next_handler_obj = obj_desc->device.handler;
+		while (next_handler_obj) {
+
+			/* Found a handler, is it for the same address space? */
+
+			if (next_handler_obj->address_space.space_id ==
+			    handler_obj->address_space.space_id) {
+				ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+						  "Found handler for region [%s] in device %p(%p) handler %p\n",
+						  acpi_ut_get_region_name
+						  (handler_obj->address_space.
+						   space_id), obj_desc,
+						  next_handler_obj,
+						  handler_obj));
+
+				/*
+				 * Since the object we found it on was a device, then it
+				 * means that someone has already installed a handler for
+				 * the branch of the namespace from this device on. Just
+				 * bail out telling the walk routine to not traverse this
+				 * branch. This preserves the scoping rule for handlers.
+				 */
+				return (AE_CTRL_DEPTH);
+			}
+
+			/* Walk the linked list of handlers attached to this device */
+
+			next_handler_obj = next_handler_obj->address_space.next;
+		}
+
+		/*
+		 * As long as the device didn't have a handler for this space we
+		 * don't care about it. We just ignore it and proceed.
+		 */
+		return (AE_OK);
+	}
+
+	/* Object is a Region */
+
+	if (obj_desc->region.space_id != handler_obj->address_space.space_id) {
+
+		/* This region is for a different address space, just ignore it */
+
+		return (AE_OK);
+	}
+
+	/*
+	 * Now we have a region and it is for the handler's address space type.
+	 *
+	 * First disconnect region for any previous handler (if any)
+	 */
+	acpi_ev_detach_region(obj_desc, FALSE);
+
+	/* Connect the region to the new handler */
+
+	status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE);
+	return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_space_handler
+ *
+ * PARAMETERS:  Node            - Namespace node for the device
+ *              space_id        - The address space ID
+ *              Handler         - Address of the handler
+ *              Setup           - Address of the setup function
+ *              Context         - Value passed to the handler on each access
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for all op_regions of a given space_id.
+ *              Assumes namespace is locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_install_space_handler(struct acpi_namespace_node * node,
+			      acpi_adr_space_type space_id,
+			      acpi_adr_space_handler handler,
+			      acpi_adr_space_setup setup, void *context)
+{
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *handler_obj;
+	acpi_status status;
+	acpi_object_type type;
+	u8 flags = 0;
+
+	ACPI_FUNCTION_TRACE(ev_install_space_handler);
+
+	/*
+	 * This registration is valid for only the types below and the root. This
+	 * is where the default handlers get placed.
+	 */
+	if ((node->type != ACPI_TYPE_DEVICE) &&
+	    (node->type != ACPI_TYPE_PROCESSOR) &&
+	    (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	if (handler == ACPI_DEFAULT_HANDLER) {
+		flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
+
+		switch (space_id) {
+		case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+			handler = acpi_ex_system_memory_space_handler;
+			setup = acpi_ev_system_memory_region_setup;
+			break;
+
+		case ACPI_ADR_SPACE_SYSTEM_IO:
+			handler = acpi_ex_system_io_space_handler;
+			setup = acpi_ev_io_space_region_setup;
+			break;
+
+		case ACPI_ADR_SPACE_PCI_CONFIG:
+			handler = acpi_ex_pci_config_space_handler;
+			setup = acpi_ev_pci_config_region_setup;
+			break;
+
+		case ACPI_ADR_SPACE_CMOS:
+			handler = acpi_ex_cmos_space_handler;
+			setup = acpi_ev_cmos_region_setup;
+			break;
+
+		case ACPI_ADR_SPACE_PCI_BAR_TARGET:
+			handler = acpi_ex_pci_bar_space_handler;
+			setup = acpi_ev_pci_bar_region_setup;
+			break;
+
+		case ACPI_ADR_SPACE_DATA_TABLE:
+			handler = acpi_ex_data_table_space_handler;
+			setup = NULL;
+			break;
+
+		default:
+			status = AE_BAD_PARAMETER;
+			goto unlock_and_exit;
+		}
+	}
+
+	/* If the caller hasn't specified a setup routine, use the default */
+
+	if (!setup) {
+		setup = acpi_ev_default_region_setup;
+	}
+
+	/* Check for an existing internal object */
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (obj_desc) {
+		/*
+		 * The attached device object already exists. Make sure the handler
+		 * is not already installed.
+		 */
+		handler_obj = obj_desc->device.handler;
+
+		/* Walk the handler list for this device */
+
+		while (handler_obj) {
+
+			/* Same space_id indicates a handler already installed */
+
+			if (handler_obj->address_space.space_id == space_id) {
+				if (handler_obj->address_space.handler ==
+				    handler) {
+					/*
+					 * It is (relatively) OK to attempt to install the SAME
+					 * handler twice. This can easily happen with the
+					 * PCI_Config space.
+					 */
+					status = AE_SAME_HANDLER;
+					goto unlock_and_exit;
+				} else {
+					/* A handler is already installed */
+
+					status = AE_ALREADY_EXISTS;
+				}
+				goto unlock_and_exit;
+			}
+
+			/* Walk the linked list of handlers */
+
+			handler_obj = handler_obj->address_space.next;
+		}
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+				  "Creating object on Device %p while installing handler\n",
+				  node));
+
+		/* obj_desc does not exist, create one */
+
+		if (node->type == ACPI_TYPE_ANY) {
+			type = ACPI_TYPE_DEVICE;
+		} else {
+			type = node->type;
+		}
+
+		obj_desc = acpi_ut_create_internal_object(type);
+		if (!obj_desc) {
+			status = AE_NO_MEMORY;
+			goto unlock_and_exit;
+		}
+
+		/* Init new descriptor */
+
+		obj_desc->common.type = (u8) type;
+
+		/* Attach the new object to the Node */
+
+		status = acpi_ns_attach_object(node, obj_desc, type);
+
+		/* Remove local reference to the object */
+
+		acpi_ut_remove_reference(obj_desc);
+
+		if (ACPI_FAILURE(status)) {
+			goto unlock_and_exit;
+		}
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+			  "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
+			  acpi_ut_get_region_name(space_id), space_id,
+			  acpi_ut_get_node_name(node), node, obj_desc));
+
+	/*
+	 * Install the handler
+	 *
+	 * At this point there is no existing handler. Just allocate the object
+	 * for the handler and link it into the list.
+	 */
+	handler_obj =
+	    acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
+	if (!handler_obj) {
+		status = AE_NO_MEMORY;
+		goto unlock_and_exit;
+	}
+
+	/* Init handler obj */
+
+	handler_obj->address_space.space_id = (u8) space_id;
+	handler_obj->address_space.handler_flags = flags;
+	handler_obj->address_space.region_list = NULL;
+	handler_obj->address_space.node = node;
+	handler_obj->address_space.handler = handler;
+	handler_obj->address_space.context = context;
+	handler_obj->address_space.setup = setup;
+
+	/* Install at head of Device.address_space list */
+
+	handler_obj->address_space.next = obj_desc->device.handler;
+
+	/*
+	 * The Device object is the first reference on the handler_obj.
+	 * Each region that uses the handler adds a reference.
+	 */
+	obj_desc->device.handler = handler_obj;
+
+	/*
+	 * Walk the namespace finding all of the regions this
+	 * handler will manage.
+	 *
+	 * Start at the device and search the branch toward
+	 * the leaf nodes until either the leaf is encountered or
+	 * a device is detected that has an address handler of the
+	 * same type.
+	 *
+	 * In either case, back up and search down the remainder
+	 * of the branch
+	 */
+	status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
+					ACPI_NS_WALK_UNLOCK,
+					acpi_ev_install_handler, handler_obj,
+					NULL);
+
+      unlock_and_exit:
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_execute_reg_methods
+ *
+ * PARAMETERS:  Node            - Namespace node for the device
+ *              space_id        - The address space ID
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Run all _REG methods for the input Space ID;
+ *              Note: assumes namespace is locked, or system init time.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_execute_reg_methods(struct acpi_namespace_node *node,
+			    acpi_adr_space_type space_id)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_execute_reg_methods);
+
+	/*
+	 * Run all _REG methods for all Operation Regions for this space ID. This
+	 * is a separate walk in order to handle any interdependencies between
+	 * regions and _REG methods. (i.e. handlers must be installed for all
+	 * regions of this Space ID before we can run any _REG methods)
+	 */
+	status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
+					ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run,
+					&space_id, NULL);
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_reg_run
+ *
+ * PARAMETERS:  walk_namespace callback
+ *
+ * DESCRIPTION: Run _REG method for region objects of the requested space_iD
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ev_reg_run(acpi_handle obj_handle,
+		u32 level, void *context, void **return_value)
+{
+	union acpi_operand_object *obj_desc;
+	struct acpi_namespace_node *node;
+	acpi_adr_space_type space_id;
+	acpi_status status;
+
+	space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context);
+
+	/* Convert and validate the device handle */
+
+	node = acpi_ns_map_handle_to_node(obj_handle);
+	if (!node) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * We only care about regions.and objects that are allowed to have address
+	 * space handlers
+	 */
+	if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
+		return (AE_OK);
+	}
+
+	/* Check for an existing internal object */
+
+	obj_desc = acpi_ns_get_attached_object(node);
+	if (!obj_desc) {
+
+		/* No object, just exit */
+
+		return (AE_OK);
+	}
+
+	/* Object is a Region */
+
+	if (obj_desc->region.space_id != space_id) {
+
+		/* This region is for a different address space, just ignore it */
+
+		return (AE_OK);
+	}
+
+	status = acpi_ev_execute_reg_method(obj_desc, 1);
+	return (status);
+}