| Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbfind - find table |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| Bob Moore | 6c9deb7 | 2007-02-02 19:48:24 +0300 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
| Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 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 |
| 48 | ACPI_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 | ******************************************************************************/ |
| 66 | acpi_status |
| 67 | acpi_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 | } |