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);
+}