linux-imx

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0

/******************************************************************************

 *

 * Module Name: tbfind   - find table

 *

 * Copyright (C) 2000 - 2019, Intel Corp.

 *

 *****************************************************************************/

​

#include <acpi/acpi.h>

#include "accommon.h"

#include "actables.h"

​

#define _COMPONENT          ACPI_TABLES

ACPI_MODULE_NAME("tbfind")

​

/*******************************************************************************

 *

 * FUNCTION:    acpi_tb_find_table

 *

 * PARAMETERS:  signature           - String with ACPI table signature

 *              oem_id              - String with the table OEM ID

 *              oem_table_id        - String with the OEM Table ID

 *              table_index         - 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

acpi_tb_find_table(char *signature,

           char *oem_id, char *oem_table_id, u32 *table_index)

{

    acpi_status status = AE_OK;

    struct acpi_table_header header;

    u32 i;

​

    ACPI_FUNCTION_TRACE(tb_find_table);

​

    /* Validate the input table signature */

​

    if (!acpi_ut_valid_nameseg(signature)) {

        return_ACPI_STATUS(AE_BAD_SIGNATURE);

    }

​

    /* Don't allow the OEM strings to be too long */

​

    if ((strlen(oem_id) > ACPI_OEM_ID_SIZE) ||

        (strlen(oem_table_id) > ACPI_OEM_TABLE_ID_SIZE)) {

        return_ACPI_STATUS(AE_AML_STRING_LIMIT);

    }

​

    /* Normalize the input strings */

​

    memset(&header, 0, sizeof(struct acpi_table_header));

    ACPI_MOVE_NAME(header.signature, signature);

    strncpy(header.oem_id, oem_id, ACPI_OEM_ID_SIZE);

    strncpy(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE);

​

    /* Search for the table */