1/****************************************************************************** 2 * 3 * Module Name: tbfind - find table 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2007, R. Byron Moore 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44#include <acpi/acpi.h> 45#include <acpi/actables.h> 46 47#define _COMPONENT ACPI_TABLES 48ACPI_MODULE_NAME("tbfind") 49 50/******************************************************************************* 51 * 52 * FUNCTION: acpi_tb_find_table 53 * 54 * PARAMETERS: Signature - String with ACPI table signature 55 * oem_id - String with the table OEM ID 56 * oem_table_id - String with the OEM Table ID 57 * table_index - Where the table index is returned 58 * 59 * RETURN: Status and table index 60 * 61 * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the 62 * Signature, OEM ID and OEM Table ID. Returns an index that can 63 * be used to get the table header or entire table. 64 * 65 ******************************************************************************/ 66acpi_status 67acpi_tb_find_table(char *signature, 68 char *oem_id, 69 char *oem_table_id, acpi_native_uint * table_index) 70{ 71 acpi_native_uint i; 72 acpi_status status; 73 74 ACPI_FUNCTION_TRACE(tb_find_table); 75 76 for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { 77 if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature), 78 signature, ACPI_NAME_SIZE)) { 79 80 /* Not the requested table */ 81 82 continue; 83 } 84 85 /* Table with matching signature has been found */ 86 87 if (!acpi_gbl_root_table_list.tables[i].pointer) { 88 89 /* Table is not currently mapped, map it */ 90 91 status = 92 acpi_tb_verify_table(&acpi_gbl_root_table_list. 93 tables[i]); 94 if (ACPI_FAILURE(status)) { 95 return_ACPI_STATUS(status); 96 } 97 98 if (!acpi_gbl_root_table_list.tables[i].pointer) { 99 continue; 100 } 101 } 102 103 /* Check for table match on all IDs */ 104 105 if (!ACPI_MEMCMP 106 (acpi_gbl_root_table_list.tables[i].pointer->signature, 107 signature, ACPI_NAME_SIZE) && (!oem_id[0] 108 || 109 !ACPI_MEMCMP 110 (acpi_gbl_root_table_list. 111 tables[i].pointer->oem_id, 112 oem_id, ACPI_OEM_ID_SIZE)) 113 && (!oem_table_id[0] 114 || !ACPI_MEMCMP(acpi_gbl_root_table_list.tables[i]. 115 pointer->oem_table_id, oem_table_id, 116 ACPI_OEM_TABLE_ID_SIZE))) { 117 *table_index = i; 118 119 ACPI_DEBUG_PRINT((ACPI_DB_TABLES, 120 "Found table [%4.4s]\n", signature)); 121 return_ACPI_STATUS(AE_OK); 122 } 123 } 124 125 return_ACPI_STATUS(AE_NOT_FOUND); 126} 127