linux/drivers/acpi/namespace/nsload.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

473 lines
12 KiB
C

/******************************************************************************
*
* 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")
/* Local prototypes */
static acpi_status
acpi_ns_load_table_by_type (
acpi_table_type table_type);
#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_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.
*
******************************************************************************/
static 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_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