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diff --git a/drivers/acpi/namespace/nsload.c b/drivers/acpi/namespace/nsload.c
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+/******************************************************************************
+ *
+ * Module Name: nsload - namespace loading/expanding/contracting procedures
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acnamesp.h>
+#include <acpi/acdispat.h>
+
+
+#define _COMPONENT ACPI_NAMESPACE
+ ACPI_MODULE_NAME ("nsload")
+
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_load_table
+ *
+ * PARAMETERS: table_desc - Descriptor for table to be loaded
+ * Node - Owning NS node
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Load one ACPI table into the namespace
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_load_table (
+ struct acpi_table_desc *table_desc,
+ struct acpi_namespace_node *node)
+{
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("ns_load_table");
+
+
+ /* Check if table contains valid AML (must be DSDT, PSDT, SSDT, etc.) */
+
+ if (!(acpi_gbl_table_data[table_desc->type].flags & ACPI_TABLE_EXECUTABLE)) {
+ /* Just ignore this table */
+
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /* Check validity of the AML start and length */
+
+ if (!table_desc->aml_start) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null AML pointer\n"));
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AML block at %p\n",
+ table_desc->aml_start));
+
+ /* Ignore table if there is no AML contained within */
+
+ if (!table_desc->aml_length) {
+ ACPI_REPORT_WARNING (("Zero-length AML block in table [%4.4s]\n",
+ table_desc->pointer->signature));
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ /*
+ * Parse the table and load the namespace with all named
+ * objects found within. Control methods are NOT parsed
+ * at this time. In fact, the control methods cannot be
+ * parsed until the entire namespace is loaded, because
+ * if a control method makes a forward reference (call)
+ * to another control method, we can't continue parsing
+ * because we don't know how many arguments to parse next!
+ */
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "**** Loading table into namespace ****\n"));
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ status = acpi_ns_parse_table (table_desc, node->child);
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /*
+ * Now we can parse the control methods. We always parse
+ * them here for a sanity check, and if configured for
+ * just-in-time parsing, we delete the control method
+ * parse trees.
+ */
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "**** Begin Table Method Parsing and Object Initialization ****\n"));
+
+ status = acpi_ds_initialize_objects (table_desc, node);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "**** Completed Table Method Parsing and Object Initialization ****\n"));
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_load_table_by_type
+ *
+ * PARAMETERS: table_type - Id of the table type to load
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Load an ACPI table or tables into the namespace. All tables
+ * of the given type are loaded. The mechanism allows this
+ * routine to be called repeatedly.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_load_table_by_type (
+ acpi_table_type table_type)
+{
+ u32 i;
+ acpi_status status;
+ struct acpi_table_desc *table_desc;
+
+
+ ACPI_FUNCTION_TRACE ("ns_load_table_by_type");
+
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /*
+ * Table types supported are:
+ * DSDT (one), SSDT/PSDT (multiple)
+ */
+ switch (table_type) {
+ case ACPI_TABLE_DSDT:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Loading DSDT\n"));
+
+ table_desc = acpi_gbl_table_lists[ACPI_TABLE_DSDT].next;
+
+ /* If table already loaded into namespace, just return */
+
+ if (table_desc->loaded_into_namespace) {
+ goto unlock_and_exit;
+ }
+
+ /* Now load the single DSDT */
+
+ status = acpi_ns_load_table (table_desc, acpi_gbl_root_node);
+ if (ACPI_SUCCESS (status)) {
+ table_desc->loaded_into_namespace = TRUE;
+ }
+ break;
+
+
+ case ACPI_TABLE_SSDT:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Loading %d SSDTs\n",
+ acpi_gbl_table_lists[ACPI_TABLE_SSDT].count));
+
+ /*
+ * Traverse list of SSDT tables
+ */
+ table_desc = acpi_gbl_table_lists[ACPI_TABLE_SSDT].next;
+ for (i = 0; i < acpi_gbl_table_lists[ACPI_TABLE_SSDT].count; i++) {
+ /*
+ * Only attempt to load table if it is not
+ * already loaded!
+ */
+ if (!table_desc->loaded_into_namespace) {
+ status = acpi_ns_load_table (table_desc, acpi_gbl_root_node);
+ if (ACPI_FAILURE (status)) {
+ break;
+ }
+
+ table_desc->loaded_into_namespace = TRUE;
+ }
+
+ table_desc = table_desc->next;
+ }
+ break;
+
+
+ case ACPI_TABLE_PSDT:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Loading %d PSDTs\n",
+ acpi_gbl_table_lists[ACPI_TABLE_PSDT].count));
+
+ /*
+ * Traverse list of PSDT tables
+ */
+ table_desc = acpi_gbl_table_lists[ACPI_TABLE_PSDT].next;
+
+ for (i = 0; i < acpi_gbl_table_lists[ACPI_TABLE_PSDT].count; i++) {
+ /* Only attempt to load table if it is not already loaded! */
+
+ if (!table_desc->loaded_into_namespace) {
+ status = acpi_ns_load_table (table_desc, acpi_gbl_root_node);
+ if (ACPI_FAILURE (status)) {
+ break;
+ }
+
+ table_desc->loaded_into_namespace = TRUE;
+ }
+
+ table_desc = table_desc->next;
+ }
+ break;
+
+
+ default:
+ status = AE_SUPPORT;
+ break;
+ }
+
+
+unlock_and_exit:
+ (void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_load_namespace
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
+ * (DSDT points to either the BIOS or a buffer.)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_load_namespace (
+ void)
+{
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_load_name_space");
+
+
+ /* There must be at least a DSDT installed */
+
+ if (acpi_gbl_DSDT == NULL) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "DSDT is not in memory\n"));
+ return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+ }
+
+ /*
+ * Load the namespace. The DSDT is required,
+ * but the SSDT and PSDT tables are optional.
+ */
+ status = acpi_ns_load_table_by_type (ACPI_TABLE_DSDT);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Ignore exceptions from these */
+
+ (void) acpi_ns_load_table_by_type (ACPI_TABLE_SSDT);
+ (void) acpi_ns_load_table_by_type (ACPI_TABLE_PSDT);
+
+ ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
+ "ACPI Namespace successfully loaded at root %p\n",
+ acpi_gbl_root_node));
+
+ return_ACPI_STATUS (status);
+}
+
+
+#ifdef ACPI_FUTURE_USAGE
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_delete_subtree
+ *
+ * PARAMETERS: start_handle - Handle in namespace where search begins
+ *
+ * RETURNS Status
+ *
+ * DESCRIPTION: Walks the namespace starting at the given handle and deletes
+ * all objects, entries, and scopes in the entire subtree.
+ *
+ * Namespace/Interpreter should be locked or the subsystem should
+ * be in shutdown before this routine is called.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_delete_subtree (
+ acpi_handle start_handle)
+{
+ acpi_status status;
+ acpi_handle child_handle;
+ acpi_handle parent_handle;
+ acpi_handle next_child_handle;
+ acpi_handle dummy;
+ u32 level;
+
+
+ ACPI_FUNCTION_TRACE ("ns_delete_subtree");
+
+
+ parent_handle = start_handle;
+ child_handle = NULL;
+ level = 1;
+
+ /*
+ * Traverse the tree of objects until we bubble back up
+ * to where we started.
+ */
+ while (level > 0) {
+ /* Attempt to get the next object in this scope */
+
+ status = acpi_get_next_object (ACPI_TYPE_ANY, parent_handle,
+ child_handle, &next_child_handle);
+
+ child_handle = next_child_handle;
+
+ /* Did we get a new object? */
+
+ if (ACPI_SUCCESS (status)) {
+ /* Check if this object has any children */
+
+ if (ACPI_SUCCESS (acpi_get_next_object (ACPI_TYPE_ANY, child_handle,
+ NULL, &dummy))) {
+ /*
+ * There is at least one child of this object,
+ * visit the object
+ */
+ level++;
+ parent_handle = child_handle;
+ child_handle = NULL;
+ }
+ }
+ else {
+ /*
+ * No more children in this object, go back up to
+ * the object's parent
+ */
+ level--;
+
+ /* Delete all children now */
+
+ acpi_ns_delete_children (child_handle);
+
+ child_handle = parent_handle;
+ status = acpi_get_parent (parent_handle, &parent_handle);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+ }
+
+ /* Now delete the starting object, and we are done */
+
+ acpi_ns_delete_node (child_handle);
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_unload_name_space
+ *
+ * PARAMETERS: Handle - Root of namespace subtree to be deleted
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Shrinks the namespace, typically in response to an undocking
+ * event. Deletes an entire subtree starting from (and
+ * including) the given handle.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_unload_namespace (
+ acpi_handle handle)
+{
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("ns_unload_name_space");
+
+
+ /* Parameter validation */
+
+ if (!acpi_gbl_root_node) {
+ return_ACPI_STATUS (AE_NO_NAMESPACE);
+ }
+
+ if (!handle) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ /* This function does the real work */
+
+ status = acpi_ns_delete_subtree (handle);
+
+ return_ACPI_STATUS (status);
+}
+
+#endif /* ACPI_FUTURE_USAGE */
+
+#endif
+
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-25 10:37:27 +0300