Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/events/evregion.c b/drivers/acpi/events/evregion.c
new file mode 100644
index 0000000..7723427
--- /dev/null
+++ b/drivers/acpi/events/evregion.c
@@ -0,0 +1,1067 @@
+/******************************************************************************
+ *
+ * Module Name: evregion - ACPI address_space (op_region) handler dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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/acevents.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
+
+#define _COMPONENT ACPI_EVENTS
+ ACPI_MODULE_NAME ("evregion")
+
+#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;
+ acpi_native_uint 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;
+ acpi_native_uint 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 - Object structure
+ * 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_parameter_info info;
+ union acpi_operand_object *params[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);
+ }
+
+ /*
+ * 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
+ */
+ params[0] = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!params[0]) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ params[1] = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+ if (!params[1]) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Setup the parameter objects */
+
+ params[0]->integer.value = region_obj->region.space_id;
+ params[1]->integer.value = function;
+ params[2] = NULL;
+
+ info.node = region_obj2->extra.method_REG;
+ info.parameters = params;
+ info.parameter_type = ACPI_PARAM_ARGS;
+
+ /* Execute the method, no return value */
+
+ ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (
+ ACPI_TYPE_METHOD, info.node, NULL));
+ status = acpi_ns_evaluate_by_handle (&info);
+
+ acpi_ut_remove_reference (params[1]);
+
+cleanup:
+ acpi_ut_remove_reference (params[0]);
+
+ 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
+ *
+ * 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,
+ void *value)
+{
+ acpi_status status;
+ acpi_status status2;
+ 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_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "No handler for Region [%4.4s] (%p) [%s]\n",
+ 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_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n",
+ 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 (e.g., _REG method for this region)
+ */
+ acpi_ex_exit_interpreter ();
+
+ status = region_setup (region_obj, ACPI_REGION_ACTIVATE,
+ handler_desc->address_space.context, ®ion_context);
+
+ /* Re-enter the interpreter */
+
+ status2 = acpi_ex_enter_interpreter ();
+ if (ACPI_FAILURE (status2)) {
+ return_ACPI_STATUS (status2);
+ }
+
+ /* Check for failure of the Region Setup */
+
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n",
+ acpi_format_exception (status),
+ 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_MEM_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",
+ ®ion_obj->region.handler->address_space, handler,
+ ACPI_FORMAT_UINT64 (address),
+ acpi_ut_get_region_name (region_obj->region.space_id)));
+
+ if (!(handler_desc->address_space.hflags & 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_REPORT_ERROR (("Handler for [%s] returned %s\n",
+ acpi_ut_get_region_name (region_obj->region.space_id),
+ acpi_format_exception (status)));
+ }
+
+ if (!(handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
+ /*
+ * We just returned from a non-default handler, we must re-enter the
+ * interpreter
+ */
+ status2 = acpi_ex_enter_interpreter ();
+ if (ACPI_FAILURE (status2)) {
+ return_ACPI_STATUS (status2);
+ }
+ }
+
+ 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 = ®ion_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_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region _REG, [%s]\n",
+ acpi_format_exception (status),
+ 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;
+ }
+ }
+
+ /* Call the setup handler with the deactivate notification */
+
+ 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_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region init, [%s]\n",
+ acpi_format_exception (status),
+ 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 better 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.
+ *
+ ******************************************************************************/
+
+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;
+ u16 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 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.hflags = 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
+ *
+ ******************************************************************************/
+
+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);
+}
+