1 files changed, 460 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/nsload.c b/drivers/acpi/namespace/nsload.c
new file mode 100644
index 000000000000..1d7aedf68a77
--- /dev/null
+++ b/drivers/acpi/namespace/nsload.c
@@ -0,0 +1,460 @@
+/******************************************************************************
+ *
+ * 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
+