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161 lines
5.5 KiB
C
161 lines
5.5 KiB
C
/******************************************************************************
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*
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* Module Name: tbfind - find table
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2019, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME ("tbfind")
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbFindTable
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*
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* PARAMETERS: Signature - String with ACPI table signature
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* OemId - String with the table OEM ID
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* OemTableId - String with the OEM Table ID
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* TableIndex - Where the table index is returned
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*
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* RETURN: Status and table index
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*
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* DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
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* Signature, OEM ID and OEM Table ID. Returns an index that can
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* be used to get the table header or entire table.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiTbFindTable (
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char *Signature,
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char *OemId,
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char *OemTableId,
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UINT32 *TableIndex)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_TABLE_HEADER Header;
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UINT32 i;
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ACPI_FUNCTION_TRACE (TbFindTable);
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/* Validate the input table signature */
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if (!AcpiUtValidNameseg (Signature))
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{
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return_ACPI_STATUS (AE_BAD_SIGNATURE);
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}
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/* Don't allow the OEM strings to be too long */
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if ((strlen (OemId) > ACPI_OEM_ID_SIZE) ||
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(strlen (OemTableId) > ACPI_OEM_TABLE_ID_SIZE))
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{
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return_ACPI_STATUS (AE_AML_STRING_LIMIT);
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}
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/* Normalize the input strings */
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memset (&Header, 0, sizeof (ACPI_TABLE_HEADER));
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ACPI_MOVE_NAME (Header.Signature, Signature);
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strncpy (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
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strncpy (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
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/* Search for the table */
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(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
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for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
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{
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if (memcmp (&(AcpiGbl_RootTableList.Tables[i].Signature),
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Header.Signature, ACPI_NAME_SIZE))
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{
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/* Not the requested table */
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continue;
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}
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/* Table with matching signature has been found */
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if (!AcpiGbl_RootTableList.Tables[i].Pointer)
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{
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/* Table is not currently mapped, map it */
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Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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if (!AcpiGbl_RootTableList.Tables[i].Pointer)
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{
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continue;
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}
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}
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/* Check for table match on all IDs */
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if (!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
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Header.Signature, ACPI_NAME_SIZE) &&
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(!OemId[0] ||
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!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
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Header.OemId, ACPI_OEM_ID_SIZE)) &&
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(!OemTableId[0] ||
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!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
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Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
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{
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*TableIndex = i;
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ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
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Header.Signature));
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goto UnlockAndExit;
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}
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}
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Status = AE_NOT_FOUND;
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
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return_ACPI_STATUS (Status);
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}
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