316 lines
8.9 KiB
C
316 lines
8.9 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: nsload - namespace loading/expanding/contracting procedures
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* 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/acnamesp.h>
|
|
#include <acpi/acdispat.h>
|
|
#include <acpi/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(acpi_native_uint 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 {
|
|
(void)acpi_tb_release_owner_id(table_index);
|
|
}
|
|
|
|
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 Method Parsing and Object Initialization ****\n"));
|
|
|
|
status = acpi_ds_initialize_objects(table_index, node);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"**** Completed Table Method Parsing and 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_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
|
|
#endif
|