1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
488 lines
14 KiB
C
488 lines
14 KiB
C
/******************************************************************************
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*
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* Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acinterp.h>
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#include <acpi/amlcode.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acevents.h>
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#include <acpi/actables.h>
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#include <acpi/acdispat.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exconfig")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_add_table
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*
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* PARAMETERS: Table - Pointer to raw table
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* parent_node - Where to load the table (scope)
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* ddb_handle - Where to return the table handle.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Common function to Install and Load an ACPI table with a
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* returned table handle.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_add_table (
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struct acpi_table_header *table,
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struct acpi_namespace_node *parent_node,
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union acpi_operand_object **ddb_handle)
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{
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acpi_status status;
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struct acpi_table_desc table_info;
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union acpi_operand_object *obj_desc;
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ACPI_FUNCTION_TRACE ("ex_add_table");
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/* Create an object to be the table handle */
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obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_REFERENCE);
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if (!obj_desc) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Install the new table into the local data structures */
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ACPI_MEMSET (&table_info, 0, sizeof (struct acpi_table_desc));
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table_info.type = ACPI_TABLE_SSDT;
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table_info.pointer = table;
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table_info.length = (acpi_size) table->length;
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table_info.allocation = ACPI_MEM_ALLOCATED;
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status = acpi_tb_install_table (&table_info);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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/* Add the table to the namespace */
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status = acpi_ns_load_table (table_info.installed_desc, parent_node);
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if (ACPI_FAILURE (status)) {
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/* Uninstall table on error */
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(void) acpi_tb_uninstall_table (table_info.installed_desc);
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goto cleanup;
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}
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/* Init the table handle */
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obj_desc->reference.opcode = AML_LOAD_OP;
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obj_desc->reference.object = table_info.installed_desc;
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*ddb_handle = obj_desc;
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return_ACPI_STATUS (AE_OK);
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cleanup:
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acpi_ut_remove_reference (obj_desc);
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_load_table_op
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*
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* PARAMETERS: walk_state - Current state with operands
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* return_desc - Where to store the return object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load an ACPI table
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*
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******************************************************************************/
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acpi_status
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acpi_ex_load_table_op (
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struct acpi_walk_state *walk_state,
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union acpi_operand_object **return_desc)
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{
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acpi_status status;
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union acpi_operand_object **operand = &walk_state->operands[0];
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struct acpi_table_header *table;
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struct acpi_namespace_node *parent_node;
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struct acpi_namespace_node *start_node;
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struct acpi_namespace_node *parameter_node = NULL;
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union acpi_operand_object *ddb_handle;
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ACPI_FUNCTION_TRACE ("ex_load_table_op");
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#if 0
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/*
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* Make sure that the signature does not match one of the tables that
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* is already loaded.
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*/
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status = acpi_tb_match_signature (operand[0]->string.pointer, NULL);
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if (status == AE_OK) {
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/* Signature matched -- don't allow override */
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return_ACPI_STATUS (AE_ALREADY_EXISTS);
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}
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#endif
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/* Find the ACPI table */
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status = acpi_tb_find_table (operand[0]->string.pointer,
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operand[1]->string.pointer,
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operand[2]->string.pointer, &table);
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if (ACPI_FAILURE (status)) {
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if (status != AE_NOT_FOUND) {
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return_ACPI_STATUS (status);
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}
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/* Table not found, return an Integer=0 and AE_OK */
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ddb_handle = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
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if (!ddb_handle) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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ddb_handle->integer.value = 0;
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*return_desc = ddb_handle;
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return_ACPI_STATUS (AE_OK);
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}
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/* Default nodes */
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start_node = walk_state->scope_info->scope.node;
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parent_node = acpi_gbl_root_node;
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/* root_path (optional parameter) */
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if (operand[3]->string.length > 0) {
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/*
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* Find the node referenced by the root_path_string. This is the
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* location within the namespace where the table will be loaded.
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*/
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status = acpi_ns_get_node_by_path (operand[3]->string.pointer, start_node,
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ACPI_NS_SEARCH_PARENT, &parent_node);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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}
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/* parameter_path (optional parameter) */
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if (operand[4]->string.length > 0) {
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if ((operand[4]->string.pointer[0] != '\\') &&
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(operand[4]->string.pointer[0] != '^')) {
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/*
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* Path is not absolute, so it will be relative to the node
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* referenced by the root_path_string (or the NS root if omitted)
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*/
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start_node = parent_node;
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}
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/*
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* Find the node referenced by the parameter_path_string
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*/
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status = acpi_ns_get_node_by_path (operand[4]->string.pointer, start_node,
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ACPI_NS_SEARCH_PARENT, ¶meter_node);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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}
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/* Load the table into the namespace */
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status = acpi_ex_add_table (table, parent_node, &ddb_handle);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Parameter Data (optional) */
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if (parameter_node) {
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/* Store the parameter data into the optional parameter object */
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status = acpi_ex_store (operand[5], ACPI_CAST_PTR (union acpi_operand_object, parameter_node),
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walk_state);
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if (ACPI_FAILURE (status)) {
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(void) acpi_ex_unload_table (ddb_handle);
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return_ACPI_STATUS (status);
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}
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}
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*return_desc = ddb_handle;
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_load_op
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*
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* PARAMETERS: obj_desc - Region or Field where the table will be
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* obtained
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* Target - Where a handle to the table will be stored
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load an ACPI table from a field or operation region
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*
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******************************************************************************/
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acpi_status
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acpi_ex_load_op (
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union acpi_operand_object *obj_desc,
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union acpi_operand_object *target,
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struct acpi_walk_state *walk_state)
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{
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acpi_status status;
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union acpi_operand_object *ddb_handle;
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union acpi_operand_object *buffer_desc = NULL;
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struct acpi_table_header *table_ptr = NULL;
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acpi_physical_address address;
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struct acpi_table_header table_header;
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u32 i;
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ACPI_FUNCTION_TRACE ("ex_load_op");
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/* Object can be either an op_region or a Field */
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_REGION:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Region %p %s\n",
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obj_desc, acpi_ut_get_object_type_name (obj_desc)));
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/*
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* If the Region Address and Length have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
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status = acpi_ds_get_region_arguments (obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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}
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/* Get the base physical address of the region */
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address = obj_desc->region.address;
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/* Get the table length from the table header */
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table_header.length = 0;
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for (i = 0; i < 8; i++) {
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status = acpi_ev_address_space_dispatch (obj_desc, ACPI_READ,
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(acpi_physical_address) (i + address), 8,
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((u8 *) &table_header) + i);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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}
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/* Sanity check the table length */
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if (table_header.length < sizeof (struct acpi_table_header)) {
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return_ACPI_STATUS (AE_BAD_HEADER);
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}
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/* Allocate a buffer for the entire table */
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table_ptr = ACPI_MEM_ALLOCATE (table_header.length);
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if (!table_ptr) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Get the entire table from the op region */
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for (i = 0; i < table_header.length; i++) {
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status = acpi_ev_address_space_dispatch (obj_desc, ACPI_READ,
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(acpi_physical_address) (i + address), 8,
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((u8 *) table_ptr + i));
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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}
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break;
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case ACPI_TYPE_LOCAL_REGION_FIELD:
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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case ACPI_TYPE_LOCAL_INDEX_FIELD:
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Field %p %s\n",
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obj_desc, acpi_ut_get_object_type_name (obj_desc)));
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/*
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* The length of the field must be at least as large as the table.
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* Read the entire field and thus the entire table. Buffer is
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* allocated during the read.
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*/
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status = acpi_ex_read_data_from_field (walk_state, obj_desc, &buffer_desc);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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table_ptr = ACPI_CAST_PTR (struct acpi_table_header, buffer_desc->buffer.pointer);
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/* Sanity check the table length */
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if (table_ptr->length < sizeof (struct acpi_table_header)) {
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return_ACPI_STATUS (AE_BAD_HEADER);
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}
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break;
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default:
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/* The table must be either an SSDT or a PSDT */
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if ((!ACPI_STRNCMP (table_ptr->signature,
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acpi_gbl_table_data[ACPI_TABLE_PSDT].signature,
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acpi_gbl_table_data[ACPI_TABLE_PSDT].sig_length)) &&
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(!ACPI_STRNCMP (table_ptr->signature,
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acpi_gbl_table_data[ACPI_TABLE_SSDT].signature,
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acpi_gbl_table_data[ACPI_TABLE_SSDT].sig_length))) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Table has invalid signature [%4.4s], must be SSDT or PSDT\n",
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table_ptr->signature));
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status = AE_BAD_SIGNATURE;
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goto cleanup;
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}
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/* Install the new table into the local data structures */
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status = acpi_ex_add_table (table_ptr, acpi_gbl_root_node, &ddb_handle);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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/* Store the ddb_handle into the Target operand */
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status = acpi_ex_store (ddb_handle, target, walk_state);
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if (ACPI_FAILURE (status)) {
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(void) acpi_ex_unload_table (ddb_handle);
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}
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return_ACPI_STATUS (status);
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cleanup:
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if (buffer_desc) {
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acpi_ut_remove_reference (buffer_desc);
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}
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else {
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ACPI_MEM_FREE (table_ptr);
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}
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_unload_table
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*
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* PARAMETERS: ddb_handle - Handle to a previously loaded table
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*
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* RETURN: Status
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*
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* DESCRIPTION: Unload an ACPI table
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*
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******************************************************************************/
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acpi_status
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acpi_ex_unload_table (
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union acpi_operand_object *ddb_handle)
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{
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acpi_status status = AE_OK;
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union acpi_operand_object *table_desc = ddb_handle;
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struct acpi_table_desc *table_info;
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ACPI_FUNCTION_TRACE ("ex_unload_table");
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/*
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* Validate the handle
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* Although the handle is partially validated in acpi_ex_reconfiguration(),
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* when it calls acpi_ex_resolve_operands(), the handle is more completely
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* validated here.
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*/
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if ((!ddb_handle) ||
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(ACPI_GET_DESCRIPTOR_TYPE (ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
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(ACPI_GET_OBJECT_TYPE (ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Get the actual table descriptor from the ddb_handle */
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table_info = (struct acpi_table_desc *) table_desc->reference.object;
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/*
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* Delete the entire namespace under this table Node
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* (Offset contains the table_id)
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*/
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acpi_ns_delete_namespace_by_owner (table_info->table_id);
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/* Delete the table itself */
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(void) acpi_tb_uninstall_table (table_info->installed_desc);
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/* Delete the table descriptor (ddb_handle) */
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acpi_ut_remove_reference (table_desc);
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return_ACPI_STATUS (status);
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}
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