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 /******************************************************************************
  *
  * Module Name: tbfind   - find table
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights. You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code. No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision. In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change. Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee. Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution. In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government. In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * 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.
  *
  * 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 MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * 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 DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #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 = AE_OK;
     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_COPY_NAMESEG (Header.Signature, Signature);
     strncpy (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
     strncpy (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
 
     /* Search for the table */
 
     (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
     for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
     {
         if (memcmp (&(AcpiGbl_RootTableList.Tables[i].Signature),
             Header.Signature, ACPI_NAMESEG_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))
             {
                 goto UnlockAndExit;
             }
 
             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_NAMESEG_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));
             goto UnlockAndExit;
         }
     }
     Status = AE_NOT_FOUND;
 
 UnlockAndExit:
     (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
     return_ACPI_STATUS (Status);
 }

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