linux-imx

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

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

 *

 * Module Name: exstoren - AML Interpreter object store support,

 *                        Store to Node (namespace object)

 *

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

 *

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

​

#include <acpi/acpi.h>

#include "accommon.h"

#include "acinterp.h"

#include "amlcode.h"

​

#define _COMPONENT          ACPI_EXECUTER

ACPI_MODULE_NAME("exstoren")

​

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

 *

 * FUNCTION:    acpi_ex_resolve_object

 *

 * PARAMETERS:  source_desc_ptr     - Pointer to the source object

 *              target_type         - Current type of the target

 *              walk_state          - Current walk state

 *

 * RETURN:      Status, resolved object in source_desc_ptr.

 *

 * DESCRIPTION: Resolve an object. If the object is a reference, dereference

 *              it and return the actual object in the source_desc_ptr.

 *

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

acpi_status

acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,

               acpi_object_type target_type,

               struct acpi_walk_state *walk_state)

{

    union acpi_operand_object *source_desc = *source_desc_ptr;

    acpi_status status = AE_OK;

​

    ACPI_FUNCTION_TRACE(ex_resolve_object);

​

    /* Ensure we have a Target that can be stored to */

​

    switch (target_type) {

    case ACPI_TYPE_BUFFER_FIELD:

    case ACPI_TYPE_LOCAL_REGION_FIELD:

    case ACPI_TYPE_LOCAL_BANK_FIELD:

    case ACPI_TYPE_LOCAL_INDEX_FIELD:

        /*

         * These cases all require only Integers or values that

         * can be converted to Integers (Strings or Buffers)

         */

    case ACPI_TYPE_INTEGER:

    case ACPI_TYPE_STRING:

    case ACPI_TYPE_BUFFER:

        /*

         * Stores into a Field/Region or into a Integer/Buffer/String

         * are all essentially the same. This case handles the

         * "interchangeable" types Integer, String, and Buffer.

         */

        if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) {

​

            /* Resolve a reference object first */

​

            status =

                acpi_ex_resolve_to_value(source_desc_ptr,

                             walk_state);

            if (ACPI_FAILURE(status)) {

                break;

            }

        }

​

        /* For copy_object, no further validation necessary */

​

        if (walk_state->opcode == AML_COPY_OBJECT_OP) {

            break;

        }

​

        /* Must have a Integer, Buffer, or String */

​

        if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&

            (source_desc->common.type != ACPI_TYPE_BUFFER) &&

            (source_desc->common.type != ACPI_TYPE_STRING) &&

            !((source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&

              (source_desc->reference.class == ACPI_REFCLASS_TABLE))) {

​

            /* Conversion successful but still not a valid type */

​

            ACPI_ERROR((AE_INFO,

                    "Cannot assign type [%s] to [%s] (must be type Int/Str/Buf)",

                    acpi_ut_get_object_type_name(source_desc),