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!
553 lines
15 KiB
C
553 lines
15 KiB
C
/******************************************************************************
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*
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* Module Name: tbinstal - ACPI table installation and removal
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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/actables.h>
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME ("tbinstal")
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_match_signature
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*
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* PARAMETERS: Signature - Table signature to match
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* table_info - Return data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned"
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* tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match.
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*
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******************************************************************************/
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acpi_status
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acpi_tb_match_signature (
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char *signature,
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struct acpi_table_desc *table_info,
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u8 search_type)
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{
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acpi_native_uint i;
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ACPI_FUNCTION_TRACE ("tb_match_signature");
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/*
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* Search for a signature match among the known table types
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*/
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for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
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if (!(acpi_gbl_table_data[i].flags & search_type)) {
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continue;
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}
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if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature,
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acpi_gbl_table_data[i].sig_length)) {
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/* Found a signature match, return index if requested */
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if (table_info) {
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table_info->type = (u8) i;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Table [%4.4s] is an ACPI table consumed by the core subsystem\n",
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(char *) acpi_gbl_table_data[i].signature));
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return_ACPI_STATUS (AE_OK);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n",
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(char *) signature));
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return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_install_table
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*
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* PARAMETERS: table_info - Return value from acpi_tb_get_table_body
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must
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* already be loaded and validated.
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* Install the table into the global data structs.
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*
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******************************************************************************/
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acpi_status
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acpi_tb_install_table (
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struct acpi_table_desc *table_info)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("tb_install_table");
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/* Lock tables while installing */
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status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n",
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table_info->pointer->signature, acpi_format_exception (status)));
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return_ACPI_STATUS (status);
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}
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/* Install the table into the global data structure */
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status = acpi_tb_init_table_descriptor (table_info->type, table_info);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n",
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table_info->pointer->signature, acpi_format_exception (status)));
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n",
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acpi_gbl_table_data[table_info->type].name, table_info->pointer));
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(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
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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_tb_recognize_table
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*
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* PARAMETERS: table_info - Return value from acpi_tb_get_table_body
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check a table signature for a match against known table types
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*
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* NOTE: All table pointers are validated as follows:
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* 1) Table pointer must point to valid physical memory
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* 2) Signature must be 4 ASCII chars, even if we don't recognize the
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* name
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* 3) Table must be readable for length specified in the header
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* 4) Table checksum must be valid (with the exception of the FACS
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* which has no checksum for some odd reason)
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*
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******************************************************************************/
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acpi_status
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acpi_tb_recognize_table (
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struct acpi_table_desc *table_info,
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u8 search_type)
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{
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struct acpi_table_header *table_header;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("tb_recognize_table");
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/* Ensure that we have a valid table pointer */
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table_header = (struct acpi_table_header *) table_info->pointer;
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if (!table_header) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* We only "recognize" a limited number of ACPI tables -- namely, the
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* ones that are used by the subsystem (DSDT, FADT, etc.)
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*
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* An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
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* This can be any one of many valid ACPI tables, it just isn't one of
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* the tables that is consumed by the core subsystem
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*/
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status = acpi_tb_match_signature (table_header->signature, table_info, search_type);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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status = acpi_tb_validate_table_header (table_header);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Return the table type and length via the info struct */
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table_info->length = (acpi_size) table_header->length;
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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_tb_init_table_descriptor
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*
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* PARAMETERS: table_type - The type of the table
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* table_info - A table info struct
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*
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* RETURN: None.
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*
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* DESCRIPTION: Install a table into the global data structs.
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*
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******************************************************************************/
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acpi_status
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acpi_tb_init_table_descriptor (
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acpi_table_type table_type,
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struct acpi_table_desc *table_info)
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{
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struct acpi_table_list *list_head;
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struct acpi_table_desc *table_desc;
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ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type);
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/* Allocate a descriptor for this table */
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table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
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if (!table_desc) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* Install the table into the global data structure
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*/
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list_head = &acpi_gbl_table_lists[table_type];
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/*
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* Two major types of tables: 1) Only one instance is allowed. This
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* includes most ACPI tables such as the DSDT. 2) Multiple instances of
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* the table are allowed. This includes SSDT and PSDTs.
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*/
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if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) {
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/*
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* Only one table allowed, and a table has alread been installed
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* at this location, so return an error.
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*/
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if (list_head->next) {
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ACPI_MEM_FREE (table_desc);
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return_ACPI_STATUS (AE_ALREADY_EXISTS);
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}
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table_desc->next = list_head->next;
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list_head->next = table_desc;
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if (table_desc->next) {
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table_desc->next->prev = table_desc;
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}
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list_head->count++;
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}
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else {
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/*
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* Link the new table in to the list of tables of this type.
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* Insert at the end of the list, order IS IMPORTANT.
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*
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* table_desc->Prev & Next are already NULL from calloc()
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*/
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list_head->count++;
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if (!list_head->next) {
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list_head->next = table_desc;
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}
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else {
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table_desc->next = list_head->next;
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while (table_desc->next->next) {
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table_desc->next = table_desc->next->next;
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}
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table_desc->next->next = table_desc;
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table_desc->prev = table_desc->next;
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table_desc->next = NULL;
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}
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}
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/* Finish initialization of the table descriptor */
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table_desc->type = (u8) table_type;
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table_desc->pointer = table_info->pointer;
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table_desc->length = table_info->length;
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table_desc->allocation = table_info->allocation;
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table_desc->aml_start = (u8 *) (table_desc->pointer + 1),
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table_desc->aml_length = (u32) (table_desc->length -
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(u32) sizeof (struct acpi_table_header));
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table_desc->table_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_TABLE);
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table_desc->loaded_into_namespace = FALSE;
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/*
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* Set the appropriate global pointer (if there is one) to point to the
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* newly installed table
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*/
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if (acpi_gbl_table_data[table_type].global_ptr) {
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*(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer;
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}
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/* Return Data */
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table_info->table_id = table_desc->table_id;
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table_info->installed_desc = table_desc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_delete_all_tables
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*
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* PARAMETERS: None.
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete all internal ACPI tables
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*
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******************************************************************************/
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void
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acpi_tb_delete_all_tables (void)
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{
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acpi_table_type type;
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/*
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* Free memory allocated for ACPI tables
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* Memory can either be mapped or allocated
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*/
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for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) {
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acpi_tb_delete_tables_by_type (type);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_delete_tables_by_type
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*
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* PARAMETERS: Type - The table type to be deleted
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete an internal ACPI table
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* Locks the ACPI table mutex
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*
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******************************************************************************/
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void
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acpi_tb_delete_tables_by_type (
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acpi_table_type type)
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{
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struct acpi_table_desc *table_desc;
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u32 count;
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u32 i;
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ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type);
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if (type > ACPI_TABLE_MAX) {
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return_VOID;
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}
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if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) {
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return;
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}
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/* Clear the appropriate "typed" global table pointer */
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switch (type) {
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case ACPI_TABLE_RSDP:
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acpi_gbl_RSDP = NULL;
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break;
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case ACPI_TABLE_DSDT:
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acpi_gbl_DSDT = NULL;
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break;
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case ACPI_TABLE_FADT:
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acpi_gbl_FADT = NULL;
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break;
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case ACPI_TABLE_FACS:
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acpi_gbl_FACS = NULL;
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break;
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case ACPI_TABLE_XSDT:
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acpi_gbl_XSDT = NULL;
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break;
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case ACPI_TABLE_SSDT:
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case ACPI_TABLE_PSDT:
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default:
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break;
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}
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/*
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* Free the table
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* 1) Get the head of the list
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*/
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table_desc = acpi_gbl_table_lists[type].next;
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count = acpi_gbl_table_lists[type].count;
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/*
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* 2) Walk the entire list, deleting both the allocated tables
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* and the table descriptors
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*/
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for (i = 0; i < count; i++) {
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table_desc = acpi_tb_uninstall_table (table_desc);
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}
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(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_delete_single_table
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*
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* PARAMETERS: table_info - A table info struct
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*
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* RETURN: None.
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*
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* DESCRIPTION: Low-level free for a single ACPI table. Handles cases where
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* the table was allocated a buffer or was mapped.
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*
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******************************************************************************/
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void
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acpi_tb_delete_single_table (
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struct acpi_table_desc *table_desc)
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{
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/* Must have a valid table descriptor and pointer */
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if ((!table_desc) ||
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(!table_desc->pointer)) {
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return;
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}
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/* Valid table, determine type of memory allocation */
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switch (table_desc->allocation) {
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case ACPI_MEM_NOT_ALLOCATED:
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break;
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case ACPI_MEM_ALLOCATED:
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ACPI_MEM_FREE (table_desc->pointer);
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break;
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case ACPI_MEM_MAPPED:
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acpi_os_unmap_memory (table_desc->pointer, table_desc->length);
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break;
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default:
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break;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_uninstall_table
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*
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* PARAMETERS: table_info - A table info struct
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*
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* RETURN: Pointer to the next table in the list (of same type)
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*
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* DESCRIPTION: Free the memory associated with an internal ACPI table that
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* is either installed or has never been installed.
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* Table mutex should be locked.
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*
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******************************************************************************/
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struct acpi_table_desc *
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acpi_tb_uninstall_table (
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struct acpi_table_desc *table_desc)
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{
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struct acpi_table_desc *next_desc;
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ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc);
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if (!table_desc) {
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return_PTR (NULL);
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}
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/* Unlink the descriptor from the doubly linked list */
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if (table_desc->prev) {
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table_desc->prev->next = table_desc->next;
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}
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else {
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/* Is first on list, update list head */
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acpi_gbl_table_lists[table_desc->type].next = table_desc->next;
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}
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if (table_desc->next) {
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table_desc->next->prev = table_desc->prev;
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}
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/* Free the memory allocated for the table itself */
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acpi_tb_delete_single_table (table_desc);
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/* Free the table descriptor */
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next_desc = table_desc->next;
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ACPI_MEM_FREE (table_desc);
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/* Return pointer to the next descriptor */
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return_PTR (next_desc);
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}
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