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/******************************************************************************

 *

 * Module Name: nsload - namespace loading/expanding/contracting procedures

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2015, 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 

#include "accommon.h"

#include "acnamesp.h"

#include "acdispat.h"

#include "actables.h"

#define _COMPONENT          ACPI_NAMESPACE

ACPI_MODULE_NAME("nsload")

/* Local prototypes */

#ifdef ACPI_FUTURE_IMPLEMENTATION

acpi_status acpi_ns_unload_namespace(acpi_handle handle);

static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle);

#endif

#ifndef ACPI_NO_METHOD_EXECUTION

/*******************************************************************************

 *

 * FUNCTION:    acpi_ns_load_table

 *

 * PARAMETERS:  table_index     - Index 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(u32 table_index, struct acpi_namespace_node *node)

{

	acpi_status status;

	ACPI_FUNCTION_TRACE(ns_load_table);

	/*

	 * 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!

	 */

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	/* If table already loaded into namespace, just return */

	if (acpi_tb_is_table_loaded(table_index)) {

		status = AE_ALREADY_EXISTS;

		goto unlock;

	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,

			  "**** Loading table into namespace ****\n"));

	status = acpi_tb_allocate_owner_id(table_index);

	if (ACPI_FAILURE(status)) {

		goto unlock;

	}

	status = acpi_ns_parse_table(table_index, node);

	if (ACPI_SUCCESS(status)) {

		acpi_tb_set_table_loaded_flag(table_index, TRUE);

	} else {

		/*

		 * On error, delete any namespace objects created by this table.

		 * We cannot initialize these objects, so delete them. There are

		 * a couple of expecially bad cases:

		 * AE_ALREADY_EXISTS - namespace collision.

		 * AE_NOT_FOUND - the target of a Scope operator does not

		 * exist. This target of Scope must already exist in the

		 * namespace, as per the ACPI specification.

		 */

		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

		acpi_ns_delete_namespace_by_owner(acpi_gbl_root_table_list.

						  tables[table_index].owner_id);

		acpi_tb_release_owner_id(table_index);

		return_ACPI_STATUS(status);

	}

unlock:

	(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 Object Initialization\n"));

	status = acpi_ds_initialize_objects(table_index, node);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,

			  "**** Completed Table Object Initialization\n"));

	return_ACPI_STATUS(status);

}

#ifdef ACPI_OBSOLETE_FUNCTIONS

/*******************************************************************************

 *

 * 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_ERROR((AE_INFO, "DSDT is not in memory"));

		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_ID_DSDT);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	/* Ignore exceptions from these */

	(void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_SSDT);

	(void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_PSDT);

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,

			      "ACPI Namespace successfully loaded at root %p\n",

			      acpi_gbl_root_node));

	return_ACPI_STATUS(status);

}

#endif

#ifdef ACPI_FUTURE_IMPLEMENTATION

/*******************************************************************************

 *

 * 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.

 *

 ******************************************************************************/

static 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_remove_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

#endif