| /****************************************************************************** |
| * |
| * Module Name: tbfind - find table |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2010, 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 "accommon.h" |
| #include "actables.h" |
| |
| #define _COMPONENT ACPI_TABLES |
| ACPI_MODULE_NAME("tbfind") |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_tb_find_table |
| * |
| * PARAMETERS: Signature - String with ACPI table signature |
| * oem_id - String with the table OEM ID |
| * oem_table_id - String with the OEM Table ID |
| * table_index - Where the table index is returned |
| * |
| * RETURN: Status and table index |
| * |
| * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the |
| * Signature, OEM ID and OEM Table ID. Returns an index that can |
| * be used to get the table header or entire table. |
| * |
| ******************************************************************************/ |
| acpi_status |
| acpi_tb_find_table(char *signature, |
| char *oem_id, char *oem_table_id, u32 *table_index) |
| { |
| u32 i; |
| acpi_status status; |
| struct acpi_table_header header; |
| |
| ACPI_FUNCTION_TRACE(tb_find_table); |
| |
| /* Normalize the input strings */ |
| |
| ACPI_MEMSET(&header, 0, sizeof(struct acpi_table_header)); |
| ACPI_STRNCPY(header.signature, signature, ACPI_NAME_SIZE); |
| ACPI_STRNCPY(header.oem_id, oem_id, ACPI_OEM_ID_SIZE); |
| ACPI_STRNCPY(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE); |
| |
| /* Search for the table */ |
| |
| for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
| if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature), |
| header.signature, ACPI_NAME_SIZE)) { |
| |
| /* Not the requested table */ |
| |
| continue; |
| } |
| |
| /* Table with matching signature has been found */ |
| |
| if (!acpi_gbl_root_table_list.tables[i].pointer) { |
| |
| /* Table is not currently mapped, map it */ |
| |
| status = |
| acpi_tb_verify_table(&acpi_gbl_root_table_list. |
| tables[i]); |
| if (ACPI_FAILURE(status)) { |
| return_ACPI_STATUS(status); |
| } |
| |
| if (!acpi_gbl_root_table_list.tables[i].pointer) { |
| continue; |
| } |
| } |
| |
| /* Check for table match on all IDs */ |
| |
| if (!ACPI_MEMCMP |
| (acpi_gbl_root_table_list.tables[i].pointer->signature, |
| header.signature, ACPI_NAME_SIZE) && (!oem_id[0] |
| || |
| !ACPI_MEMCMP |
| (acpi_gbl_root_table_list. |
| tables[i].pointer-> |
| oem_id, |
| header.oem_id, |
| ACPI_OEM_ID_SIZE)) |
| && (!oem_table_id[0] |
| || !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i]. |
| pointer->oem_table_id, |
| header.oem_table_id, |
| ACPI_OEM_TABLE_ID_SIZE))) { |
| *table_index = i; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_TABLES, |
| "Found table [%4.4s]\n", |
| header.signature)); |
| return_ACPI_STATUS(AE_OK); |
| } |
| } |
| |
| return_ACPI_STATUS(AE_NOT_FOUND); |
| } |