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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6595 | serge | 1 | /****************************************************************************** |
| 2 | * |
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| 3 | * Module Name: tbfind - find table |
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| 4 | * |
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| 5 | *****************************************************************************/ |
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| 6 | |||
| 7 | /* |
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| 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
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| 9 | * All rights reserved. |
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| 10 | * |
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| 11 | * Redistribution and use in source and binary forms, with or without |
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| 12 | * modification, are permitted provided that the following conditions |
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| 13 | * are met: |
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| 14 | * 1. Redistributions of source code must retain the above copyright |
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| 15 | * notice, this list of conditions, and the following disclaimer, |
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| 16 | * without modification. |
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| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
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| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
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| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
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| 20 | * including a substantially similar Disclaimer requirement for further |
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| 21 | * binary redistribution. |
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| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
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| 23 | * of any contributors may be used to endorse or promote products derived |
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| 24 | * from this software without specific prior written permission. |
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| 25 | * |
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| 26 | * Alternatively, this software may be distributed under the terms of the |
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| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
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| 28 | * Software Foundation. |
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| 29 | * |
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| 30 | * NO WARRANTY |
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| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
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| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 41 | * POSSIBILITY OF SUCH DAMAGES. |
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| 42 | */ |
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| 43 | |||
| 44 | #include |
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| 45 | #include "accommon.h" |
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| 46 | #include "actables.h" |
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| 47 | |||
| 48 | #define _COMPONENT ACPI_TABLES |
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| 49 | ACPI_MODULE_NAME("tbfind") |
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| 50 | |||
| 51 | /******************************************************************************* |
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| 52 | * |
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| 53 | * FUNCTION: acpi_tb_find_table |
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| 54 | * |
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| 55 | * PARAMETERS: signature - String with ACPI table signature |
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| 56 | * oem_id - String with the table OEM ID |
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| 57 | * oem_table_id - String with the OEM Table ID |
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| 58 | * table_index - Where the table index is returned |
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| 59 | * |
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| 60 | * RETURN: Status and table index |
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| 61 | * |
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| 62 | * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the |
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| 63 | * Signature, OEM ID and OEM Table ID. Returns an index that can |
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| 64 | * be used to get the table header or entire table. |
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| 65 | * |
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| 66 | ******************************************************************************/ |
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| 67 | acpi_status |
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| 68 | acpi_tb_find_table(char *signature, |
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| 69 | char *oem_id, char *oem_table_id, u32 *table_index) |
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| 70 | { |
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| 71 | acpi_status status; |
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| 72 | struct acpi_table_header header; |
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| 73 | u32 i; |
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| 74 | |||
| 75 | ACPI_FUNCTION_TRACE(tb_find_table); |
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| 76 | |||
| 77 | /* Validate the input table signature */ |
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| 78 | |||
| 79 | if (!acpi_is_valid_signature(signature)) { |
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| 80 | return_ACPI_STATUS(AE_BAD_SIGNATURE); |
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| 81 | } |
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| 82 | |||
| 83 | /* Don't allow the OEM strings to be too long */ |
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| 84 | |||
| 85 | if ((strlen(oem_id) > ACPI_OEM_ID_SIZE) || |
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| 86 | (strlen(oem_table_id) > ACPI_OEM_TABLE_ID_SIZE)) { |
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| 87 | return_ACPI_STATUS(AE_AML_STRING_LIMIT); |
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| 88 | } |
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| 89 | |||
| 90 | /* Normalize the input strings */ |
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| 91 | |||
| 92 | memset(&header, 0, sizeof(struct acpi_table_header)); |
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| 93 | ACPI_MOVE_NAME(header.signature, signature); |
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| 94 | strncpy(header.oem_id, oem_id, ACPI_OEM_ID_SIZE); |
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| 95 | strncpy(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE); |
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| 96 | |||
| 97 | /* Search for the table */ |
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| 98 | |||
| 99 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { |
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| 100 | if (memcmp(&(acpi_gbl_root_table_list.tables[i].signature), |
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| 101 | header.signature, ACPI_NAME_SIZE)) { |
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| 102 | |||
| 103 | /* Not the requested table */ |
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| 104 | |||
| 105 | continue; |
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| 106 | } |
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| 107 | |||
| 108 | /* Table with matching signature has been found */ |
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| 109 | |||
| 110 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
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| 111 | |||
| 112 | /* Table is not currently mapped, map it */ |
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| 113 | |||
| 114 | status = |
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| 115 | acpi_tb_validate_table(&acpi_gbl_root_table_list. |
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| 116 | tables[i]); |
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| 117 | if (ACPI_FAILURE(status)) { |
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| 118 | return_ACPI_STATUS(status); |
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| 119 | } |
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| 120 | |||
| 121 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
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| 122 | continue; |
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| 123 | } |
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| 124 | } |
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| 125 | |||
| 126 | /* Check for table match on all IDs */ |
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| 127 | |||
| 128 | if (!memcmp |
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| 129 | (acpi_gbl_root_table_list.tables[i].pointer->signature, |
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| 130 | header.signature, ACPI_NAME_SIZE) && (!oem_id[0] |
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| 131 | || |
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| 132 | !memcmp |
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| 133 | (acpi_gbl_root_table_list. |
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| 134 | tables[i].pointer-> |
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| 135 | oem_id, |
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| 136 | header.oem_id, |
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| 137 | ACPI_OEM_ID_SIZE)) |
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| 138 | && (!oem_table_id[0] |
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| 139 | || !memcmp(acpi_gbl_root_table_list.tables[i].pointer-> |
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| 140 | oem_table_id, header.oem_table_id, |
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| 141 | ACPI_OEM_TABLE_ID_SIZE))) { |
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| 142 | *table_index = i; |
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| 143 | |||
| 144 | ACPI_DEBUG_PRINT((ACPI_DB_TABLES, |
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| 145 | "Found table [%4.4s]\n", |
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| 146 | header.signature)); |
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| 147 | return_ACPI_STATUS(AE_OK); |
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| 148 | } |
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| 149 | } |
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| 150 | |||
| 151 | return_ACPI_STATUS(AE_NOT_FOUND); |
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| 152 | } |