/******************************************************************************
*
* Module Name: tbfind - find table
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2016, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbfind")
/*******************************************************************************
*
* FUNCTION: AcpiTbFindTable
*
* PARAMETERS: Signature - String with ACPI table signature
* OemId - String with the table OEM ID
* OemTableId - String with the OEM Table ID
* TableIndex - Where the table index is returned
*
* RETURN: Status and table index
*
* DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
* Signature, OEM ID and OEM Table ID. Returns an index that can
* be used to get the table header or entire table.
*
******************************************************************************/
ACPI_STATUS
AcpiTbFindTable (
char *Signature,
char *OemId,
char *OemTableId,
UINT32 *TableIndex)
{
ACPI_STATUS Status;
ACPI_TABLE_HEADER Header;
UINT32 i;
ACPI_FUNCTION_TRACE (TbFindTable);
/* Validate the input table signature */
if (!AcpiUtValidNameseg (Signature))
{
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
/* Don't allow the OEM strings to be too long */
if ((strlen (OemId) > ACPI_OEM_ID_SIZE) ||
(strlen (OemTableId) > ACPI_OEM_TABLE_ID_SIZE))
{
return_ACPI_STATUS (AE_AML_STRING_LIMIT);
}
/* Normalize the input strings */
memset (&Header, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_MOVE_NAME (Header.Signature, Signature);
strncpy (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
strncpy (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
/* Search for the table */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (memcmp (&(AcpiGbl_RootTableList.Tables[i].Signature),
Header.Signature, ACPI_NAME_SIZE))
{
/* Not the requested table */
continue;
}
/* Table with matching signature has been found */
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
/* Table is not currently mapped, map it */
Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/* Check for table match on all IDs */
if (!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
Header.Signature, ACPI_NAME_SIZE) &&
(!OemId[0] ||
!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
Header.OemId, ACPI_OEM_ID_SIZE)) &&
(!OemTableId[0] ||
!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
{
*TableIndex = i;
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
Header.Signature));
return_ACPI_STATUS (AE_OK);
}
}
return_ACPI_STATUS (AE_NOT_FOUND);
}