tbfind.c revision 217365
1167802Sjkim/****************************************************************************** 2167802Sjkim * 3167802Sjkim * Module Name: tbfind - find table 4167802Sjkim * 5167802Sjkim *****************************************************************************/ 6167802Sjkim 7217365Sjkim/* 8217365Sjkim * Copyright (C) 2000 - 2011, Intel Corp. 9167802Sjkim * All rights reserved. 10167802Sjkim * 11217365Sjkim * Redistribution and use in source and binary forms, with or without 12217365Sjkim * modification, are permitted provided that the following conditions 13217365Sjkim * are met: 14217365Sjkim * 1. Redistributions of source code must retain the above copyright 15217365Sjkim * notice, this list of conditions, and the following disclaimer, 16217365Sjkim * without modification. 17217365Sjkim * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18217365Sjkim * substantially similar to the "NO WARRANTY" disclaimer below 19217365Sjkim * ("Disclaimer") and any redistribution must be conditioned upon 20217365Sjkim * including a substantially similar Disclaimer requirement for further 21217365Sjkim * binary redistribution. 22217365Sjkim * 3. Neither the names of the above-listed copyright holders nor the names 23217365Sjkim * of any contributors may be used to endorse or promote products derived 24217365Sjkim * from this software without specific prior written permission. 25167802Sjkim * 26217365Sjkim * Alternatively, this software may be distributed under the terms of the 27217365Sjkim * GNU General Public License ("GPL") version 2 as published by the Free 28217365Sjkim * Software Foundation. 29167802Sjkim * 30217365Sjkim * NO WARRANTY 31217365Sjkim * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32217365Sjkim * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33217365Sjkim * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34217365Sjkim * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35217365Sjkim * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36217365Sjkim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37217365Sjkim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38217365Sjkim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39217365Sjkim * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40217365Sjkim * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41217365Sjkim * POSSIBILITY OF SUCH DAMAGES. 42217365Sjkim */ 43167802Sjkim 44167802Sjkim#define __TBFIND_C__ 45167802Sjkim 46193341Sjkim#include <contrib/dev/acpica/include/acpi.h> 47193341Sjkim#include <contrib/dev/acpica/include/accommon.h> 48193341Sjkim#include <contrib/dev/acpica/include/actables.h> 49167802Sjkim 50167802Sjkim#define _COMPONENT ACPI_TABLES 51167802Sjkim ACPI_MODULE_NAME ("tbfind") 52167802Sjkim 53167802Sjkim 54167802Sjkim/******************************************************************************* 55167802Sjkim * 56167802Sjkim * FUNCTION: AcpiTbFindTable 57167802Sjkim * 58167802Sjkim * PARAMETERS: Signature - String with ACPI table signature 59167802Sjkim * OemId - String with the table OEM ID 60167802Sjkim * OemTableId - String with the OEM Table ID 61167802Sjkim * TableIndex - Where the table index is returned 62167802Sjkim * 63167802Sjkim * RETURN: Status and table index 64167802Sjkim * 65167802Sjkim * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the 66167802Sjkim * Signature, OEM ID and OEM Table ID. Returns an index that can 67167802Sjkim * be used to get the table header or entire table. 68167802Sjkim * 69167802Sjkim ******************************************************************************/ 70167802Sjkim 71167802SjkimACPI_STATUS 72167802SjkimAcpiTbFindTable ( 73167802Sjkim char *Signature, 74167802Sjkim char *OemId, 75167802Sjkim char *OemTableId, 76193267Sjkim UINT32 *TableIndex) 77167802Sjkim{ 78193267Sjkim UINT32 i; 79167802Sjkim ACPI_STATUS Status; 80193267Sjkim ACPI_TABLE_HEADER Header; 81167802Sjkim 82167802Sjkim 83167802Sjkim ACPI_FUNCTION_TRACE (TbFindTable); 84167802Sjkim 85167802Sjkim 86193267Sjkim /* Normalize the input strings */ 87193267Sjkim 88193267Sjkim ACPI_MEMSET (&Header, 0, sizeof (ACPI_TABLE_HEADER)); 89193267Sjkim ACPI_STRNCPY (Header.Signature, Signature, ACPI_NAME_SIZE); 90193267Sjkim ACPI_STRNCPY (Header.OemId, OemId, ACPI_OEM_ID_SIZE); 91193267Sjkim ACPI_STRNCPY (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE); 92193267Sjkim 93193267Sjkim /* Search for the table */ 94193267Sjkim 95207344Sjkim for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i) 96167802Sjkim { 97167802Sjkim if (ACPI_MEMCMP (&(AcpiGbl_RootTableList.Tables[i].Signature), 98193267Sjkim Header.Signature, ACPI_NAME_SIZE)) 99167802Sjkim { 100167802Sjkim /* Not the requested table */ 101167802Sjkim 102167802Sjkim continue; 103167802Sjkim } 104167802Sjkim 105167802Sjkim /* Table with matching signature has been found */ 106167802Sjkim 107167802Sjkim if (!AcpiGbl_RootTableList.Tables[i].Pointer) 108167802Sjkim { 109167802Sjkim /* Table is not currently mapped, map it */ 110167802Sjkim 111167802Sjkim Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]); 112167802Sjkim if (ACPI_FAILURE (Status)) 113167802Sjkim { 114167802Sjkim return_ACPI_STATUS (Status); 115167802Sjkim } 116167802Sjkim 117167802Sjkim if (!AcpiGbl_RootTableList.Tables[i].Pointer) 118167802Sjkim { 119167802Sjkim continue; 120167802Sjkim } 121167802Sjkim } 122167802Sjkim 123167802Sjkim /* Check for table match on all IDs */ 124167802Sjkim 125167802Sjkim if (!ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->Signature, 126193267Sjkim Header.Signature, ACPI_NAME_SIZE) && 127167802Sjkim (!OemId[0] || 128167802Sjkim !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemId, 129193267Sjkim Header.OemId, ACPI_OEM_ID_SIZE)) && 130167802Sjkim (!OemTableId[0] || 131167802Sjkim !ACPI_MEMCMP (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId, 132193267Sjkim Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE))) 133167802Sjkim { 134167802Sjkim *TableIndex = i; 135167802Sjkim 136167802Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n", 137193267Sjkim Header.Signature)); 138167802Sjkim return_ACPI_STATUS (AE_OK); 139167802Sjkim } 140167802Sjkim } 141167802Sjkim 142167802Sjkim return_ACPI_STATUS (AE_NOT_FOUND); 143167802Sjkim} 144