/******************************************************************************
 *
 * Module Name: dsobject - Dispatcher object management routines
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2011, 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/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "acinterp.h"

#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dsobject")

/* Local prototypes */
static acpi_status
acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
                              union acpi_parse_object *op,
                              union acpi_operand_object **obj_desc_ptr);

#ifndef ACPI_NO_METHOD_EXECUTION
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_build_internal_object
 *
 * PARAMETERS:  walk_state      - Current walk state
 *              Op              - Parser object to be translated
 *              obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
 *              Simple objects are any objects other than a package object!
 *
 ******************************************************************************/

static acpi_status
acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
                              union acpi_parse_object *op,
                              union acpi_operand_object **obj_desc_ptr)
{
        union acpi_operand_object *obj_desc;
        acpi_status status;
        acpi_object_type type;

        ACPI_FUNCTION_TRACE(ds_build_internal_object);

        *obj_desc_ptr = NULL;
        if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
                /*
                 * This is a named object reference. If this name was
                 * previously looked up in the namespace, it was stored in this op.
                 * Otherwise, go ahead and look it up now
                 */
                if (!op->common.node) {
                        status = acpi_ns_lookup(walk_state->scope_info,
                                                op->common.value.string,
                                                ACPI_TYPE_ANY,
                                                ACPI_IMODE_EXECUTE,
                                                ACPI_NS_SEARCH_PARENT |
                                                ACPI_NS_DONT_OPEN_SCOPE, NULL,
                                                ACPI_CAST_INDIRECT_PTR(struct
                                                                       acpi_namespace_node,
                                                                       &(op->
                                                                         common.
                                                                         node)));
                        if (ACPI_FAILURE(status)) {

                                /* Check if we are resolving a named reference within a package */

                                if ((status == AE_NOT_FOUND)
                                    && (acpi_gbl_enable_interpreter_slack)
                                    &&
                                    ((op->common.parent->common.aml_opcode ==
                                      AML_PACKAGE_OP)
                                     || (op->common.parent->common.aml_opcode ==
                                         AML_VAR_PACKAGE_OP))) {
                                        /*
                                         * We didn't find the target and we are populating elements
                                         * of a package - ignore if slack enabled. Some ASL code
                                         * contains dangling invalid references in packages and
                                         * expects that no exception will be issued. Leave the
                                         * element as a null element. It cannot be used, but it
                                         * can be overwritten by subsequent ASL code - this is
                                         * typically the case.
                                         */
                                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                                          "Ignoring unresolved reference in package [%4.4s]\n",
                                                          walk_state->
                                                          scope_info->scope.
                                                          node->name.ascii));

                                        return_ACPI_STATUS(AE_OK);
                                } else {
                                        ACPI_ERROR_NAMESPACE(op->common.value.
                                                             string, status);
                                }

                                return_ACPI_STATUS(status);
                        }
                }

                /* Special object resolution for elements of a package */

                if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
                    (op->common.parent->common.aml_opcode ==
                     AML_VAR_PACKAGE_OP)) {
                        /*
                         * Attempt to resolve the node to a value before we insert it into
                         * the package. If this is a reference to a common data type,
                         * resolve it immediately. According to the ACPI spec, package
                         * elements can only be "data objects" or method references.
                         * Attempt to resolve to an Integer, Buffer, String or Package.
                         * If cannot, return the named reference (for things like Devices,
                         * Methods, etc.) Buffer Fields and Fields will resolve to simple
                         * objects (int/buf/str/pkg).
                         *
                         * NOTE: References to things like Devices, Methods, Mutexes, etc.
                         * will remain as named references. This behavior is not described
                         * in the ACPI spec, but it appears to be an oversight.
                         */
                        obj_desc =
                            ACPI_CAST_PTR(union acpi_operand_object,
                                          op->common.node);

                        status =
                            acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
                                                          (struct
                                                           acpi_namespace_node,
                                                           &obj_desc),
                                                          walk_state);
                        if (ACPI_FAILURE(status)) {
                                return_ACPI_STATUS(status);
                        }

                        /*
                         * Special handling for Alias objects. We need to setup the type
                         * and the Op->Common.Node to point to the Alias target. Note,
                         * Alias has at most one level of indirection internally.
                         */
                        type = op->common.node->type;
                        if (type == ACPI_TYPE_LOCAL_ALIAS) {
                                type = obj_desc->common.type;
                                op->common.node =
                                    ACPI_CAST_PTR(struct acpi_namespace_node,
                                                  op->common.node->object);
                        }

                        switch (type) {
                                /*
                                 * For these types, we need the actual node, not the subobject.
                                 * However, the subobject did not get an extra reference count above.
                                 *
                                 * TBD: should ex_resolve_node_to_value be changed to fix this?
                                 */
                        case ACPI_TYPE_DEVICE:
                        case ACPI_TYPE_THERMAL:

                                acpi_ut_add_reference(op->common.node->object);

                                /*lint -fallthrough */
                                /*
                                 * For these types, we need the actual node, not the subobject.
                                 * The subobject got an extra reference count in ex_resolve_node_to_value.
                                 */
                        case ACPI_TYPE_MUTEX:
                        case ACPI_TYPE_METHOD:
                        case ACPI_TYPE_POWER:
                        case ACPI_TYPE_PROCESSOR:
                        case ACPI_TYPE_EVENT:
                        case ACPI_TYPE_REGION:

                                /* We will create a reference object for these types below */
                                break;

                        default:
                                /*
                                 * All other types - the node was resolved to an actual
                                 * object, we are done.
                                 */
                                goto exit;
                        }
                }
        }

        /* Create and init a new internal ACPI object */

        obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
                                                   (op->common.aml_opcode))->
                                                  object_type);
        if (!obj_desc) {
                return_ACPI_STATUS(AE_NO_MEMORY);
        }

        status =
            acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
                                        &obj_desc);
        if (ACPI_FAILURE(status)) {
                acpi_ut_remove_reference(obj_desc);
                return_ACPI_STATUS(status);
        }

      exit:
        *obj_desc_ptr = obj_desc;
        return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_build_internal_buffer_obj
 *
 * PARAMETERS:  walk_state      - Current walk state
 *              Op              - Parser object to be translated
 *              buffer_length   - Length of the buffer
 *              obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op package object to the equivalent
 *              namespace object
 *
 ******************************************************************************/

acpi_status
acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
                                  union acpi_parse_object *op,
                                  u32 buffer_length,
                                  union acpi_operand_object **obj_desc_ptr)
{
        union acpi_parse_object *arg;
        union acpi_operand_object *obj_desc;
        union acpi_parse_object *byte_list;
        u32 byte_list_length = 0;

        ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);

        /*
         * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
         * The buffer object already exists (from the NS node), otherwise it must
         * be created.
         */
        obj_desc = *obj_desc_ptr;
        if (!obj_desc) {

                /* Create a new buffer object */

                obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
                *obj_desc_ptr = obj_desc;
                if (!obj_desc) {
                        return_ACPI_STATUS(AE_NO_MEMORY);
                }
        }

        /*
         * Second arg is the buffer data (optional) byte_list can be either
         * individual bytes or a string initializer.  In either case, a
         * byte_list appears in the AML.
         */
        arg = op->common.value.arg;     /* skip first arg */

        byte_list = arg->named.next;
        if (byte_list) {
                if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
                        ACPI_ERROR((AE_INFO,
                                    "Expecting bytelist, found AML opcode 0x%X in op %p",
                                    byte_list->common.aml_opcode, byte_list));

                        acpi_ut_remove_reference(obj_desc);
                        return (AE_TYPE);
                }

                byte_list_length = (u32) byte_list->common.value.integer;
        }

        /*
         * The buffer length (number of bytes) will be the larger of:
         * 1) The specified buffer length and
         * 2) The length of the initializer byte list
         */
        obj_desc->buffer.length = buffer_length;
        if (byte_list_length > buffer_length) {
                obj_desc->buffer.length = byte_list_length;
        }

        /* Allocate the buffer */

        if (obj_desc->buffer.length == 0) {
                obj_desc->buffer.pointer = NULL;
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                                  "Buffer defined with zero length in AML, creating\n"));
        } else {
                obj_desc->buffer.pointer =
                    ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
                if (!obj_desc->buffer.pointer) {
                        acpi_ut_delete_object_desc(obj_desc);
                        return_ACPI_STATUS(AE_NO_MEMORY);
                }

                /* Initialize buffer from the byte_list (if present) */

                if (byte_list) {
                        ACPI_MEMCPY(obj_desc->buffer.pointer,
                                    byte_list->named.data, byte_list_length);
                }
        }

        obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
        op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
        return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_build_internal_package_obj
 *
 * PARAMETERS:  walk_state      - Current walk state
 *              Op              - Parser object to be translated
 *              element_count   - Number of elements in the package - this is
 *                                the num_elements argument to Package()
 *              obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op package object to the equivalent
 *              namespace object
 *
 * NOTE: The number of elements in the package will be always be the num_elements
 * count, regardless of the number of elements in the package list. If
 * num_elements is smaller, only that many package list elements are used.
 * if num_elements is larger, the Package object is padded out with
 * objects of type Uninitialized (as per ACPI spec.)
 *
 * Even though the ASL compilers do not allow num_elements to be smaller
 * than the Package list length (for the fixed length package opcode), some
 * BIOS code modifies the AML on the fly to adjust the num_elements, and
 * this code compensates for that. This also provides compatibility with
 * other AML interpreters.
 *
 ******************************************************************************/

acpi_status
acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
                                   union acpi_parse_object *op,
                                   u32 element_count,
                                   union acpi_operand_object **obj_desc_ptr)
{
        union acpi_parse_object *arg;
        union acpi_parse_object *parent;
        union acpi_operand_object *obj_desc = NULL;
        acpi_status status = AE_OK;
        unsigned i;
        u16 index;
        u16 reference_count;

        ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);

        /* Find the parent of a possibly nested package */

        parent = op->common.parent;
        while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
               (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
                parent = parent->common.parent;
        }

        /*
         * If we are evaluating a Named package object "Name (xxxx, Package)",
         * the package object already exists, otherwise it must be created.
         */
        obj_desc = *obj_desc_ptr;
        if (!obj_desc) {
                obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
                *obj_desc_ptr = obj_desc;
                if (!obj_desc) {
                        return_ACPI_STATUS(AE_NO_MEMORY);
                }

                obj_desc->package.node = parent->common.node;
        }

        /*
         * Allocate the element array (array of pointers to the individual
         * objects) based on the num_elements parameter. Add an extra pointer slot
         * so that the list is always null terminated.
         */
        obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
                                                           element_count +
                                                           1) * sizeof(void *));

        if (!obj_desc->package.elements) {
                acpi_ut_delete_object_desc(obj_desc);
                return_ACPI_STATUS(AE_NO_MEMORY);
        }

        obj_desc->package.count = element_count;

        /*
         * Initialize the elements of the package, up to the num_elements count.
         * Package is automatically padded with uninitialized (NULL) elements
         * if num_elements is greater than the package list length. Likewise,
         * Package is truncated if num_elements is less than the list length.
         */
        arg = op->common.value.arg;
        arg = arg->common.next;
        for (i = 0; arg && (i < element_count); i++) {
                if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
                        if (arg->common.node->type == ACPI_TYPE_METHOD) {
                                /*
                                 * A method reference "looks" to the parser to be a method
                                 * invocation, so we special case it here
                                 */
                                arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
                                status =
                                    acpi_ds_build_internal_object(walk_state,
                                                                  arg,
                                                                  &obj_desc->
                                                                  package.
                                                                  elements[i]);
                        } else {
                                /* This package element is already built, just get it */

                                obj_desc->package.elements[i] =
                                    ACPI_CAST_PTR(union acpi_operand_object,
                                                  arg->common.node);
                        }
                } else {
                        status = acpi_ds_build_internal_object(walk_state, arg,
                                                               &obj_desc->
                                                               package.
                                                               elements[i]);
                }

                if (*obj_desc_ptr) {

                        /* Existing package, get existing reference count */

                        reference_count =
                            (*obj_desc_ptr)->common.reference_count;
                        if (reference_count > 1) {

                                /* Make new element ref count match original ref count */

                                for (index = 0; index < (reference_count - 1);
                                     index++) {
                                        acpi_ut_add_reference((obj_desc->
                                                               package.
                                                               elements[i]));
                                }
                        }
                }

                arg = arg->common.next;
        }

        /* Check for match between num_elements and actual length of package_list */

        if (arg) {
                /*
                 * num_elements was exhausted, but there are remaining elements in the
                 * package_list. Truncate the package to num_elements.
                 *
                 * Note: technically, this is an error, from ACPI spec: "It is an error
                 * for NumElements to be less than the number of elements in the
                 * PackageList". However, we just print a message and
                 * no exception is returned. This provides Windows compatibility. Some
                 * BIOSs will alter the num_elements on the fly, creating this type
                 * of ill-formed package object.
                 */
                while (arg) {
                        /*
                         * We must delete any package elements that were created earlier
                         * and are not going to be used because of the package truncation.
                         */
                        if (arg->common.node) {
                                acpi_ut_remove_reference(ACPI_CAST_PTR
                                                         (union
                                                          acpi_operand_object,
                                                          arg->common.node));
                                arg->common.node = NULL;
                        }

                        /* Find out how many elements there really are */

                        i++;
                        arg = arg->common.next;
                }

                ACPI_INFO((AE_INFO,
                           "Actual Package length (%u) is larger than NumElements field (%u), truncated\n",
                           i, element_count));
        } else if (i < element_count) {
                /*
                 * Arg list (elements) was exhausted, but we did not reach num_elements count.
                 * Note: this is not an error, the package is padded out with NULLs.
                 */
                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                  "Package List length (%u) smaller than NumElements count (%u), padded with null elements\n",
                                  i, element_count));
        }

        obj_desc->package.flags |= AOPOBJ_DATA_VALID;
        op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
        return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_create_node
 *
 * PARAMETERS:  walk_state      - Current walk state
 *              Node            - NS Node to be initialized
 *              Op              - Parser object to be translated
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create the object to be associated with a namespace node
 *
 ******************************************************************************/

acpi_status
acpi_ds_create_node(struct acpi_walk_state *walk_state,
                    struct acpi_namespace_node *node,
                    union acpi_parse_object *op)
{
        acpi_status status;
        union acpi_operand_object *obj_desc;

        ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);

        /*
         * Because of the execution pass through the non-control-method
         * parts of the table, we can arrive here twice.  Only init
         * the named object node the first time through
         */
        if (acpi_ns_get_attached_object(node)) {
                return_ACPI_STATUS(AE_OK);
        }

        if (!op->common.value.arg) {

                /* No arguments, there is nothing to do */

                return_ACPI_STATUS(AE_OK);
        }

        /* Build an internal object for the argument(s) */

        status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
                                               &obj_desc);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }

        /* Re-type the object according to its argument */

        node->type = obj_desc->common.type;

        /* Attach obj to node */

        status = acpi_ns_attach_object(node, obj_desc, node->type);

        /* Remove local reference to the object */

        acpi_ut_remove_reference(obj_desc);
        return_ACPI_STATUS(status);
}

#endif                          /* ACPI_NO_METHOD_EXECUTION */

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_init_object_from_op
 *
 * PARAMETERS:  walk_state      - Current walk state
 *              Op              - Parser op used to init the internal object
 *              Opcode          - AML opcode associated with the object
 *              ret_obj_desc    - Namespace object to be initialized
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Initialize a namespace object from a parser Op and its
 *              associated arguments.  The namespace object is a more compact
 *              representation of the Op and its arguments.
 *
 ******************************************************************************/

acpi_status
acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
                            union acpi_parse_object *op,
                            u16 opcode,
                            union acpi_operand_object **ret_obj_desc)
{
        const struct acpi_opcode_info *op_info;
        union acpi_operand_object *obj_desc;
        acpi_status status = AE_OK;

        ACPI_FUNCTION_TRACE(ds_init_object_from_op);

        obj_desc = *ret_obj_desc;
        op_info = acpi_ps_get_opcode_info(opcode);
        if (op_info->class == AML_CLASS_UNKNOWN) {

                /* Unknown opcode */

                return_ACPI_STATUS(AE_TYPE);
        }

        /* Perform per-object initialization */

        switch (obj_desc->common.type) {
        case ACPI_TYPE_BUFFER:

                /*
                 * Defer evaluation of Buffer term_arg operand
                 */
                obj_desc->buffer.node =
                    ACPI_CAST_PTR(struct acpi_namespace_node,
                                  walk_state->operands[0]);
                obj_desc->buffer.aml_start = op->named.data;
                obj_desc->buffer.aml_length = op->named.length;
                break;

        case ACPI_TYPE_PACKAGE:

                /*
                 * Defer evaluation of Package term_arg operand
                 */
                obj_desc->package.node =
                    ACPI_CAST_PTR(struct acpi_namespace_node,
                                  walk_state->operands[0]);
                obj_desc->package.aml_start = op->named.data;
                obj_desc->package.aml_length = op->named.length;
                break;

        case ACPI_TYPE_INTEGER:

                switch (op_info->type) {
                case AML_TYPE_CONSTANT:
                        /*
                         * Resolve AML Constants here - AND ONLY HERE!
                         * All constants are integers.
                         * We mark the integer with a flag that indicates that it started
                         * life as a constant -- so that stores to constants will perform
                         * as expected (noop). zero_op is used as a placeholder for optional
                         * target operands.
                         */
                        obj_desc->common.flags = AOPOBJ_AML_CONSTANT;

                        switch (opcode) {
                        case AML_ZERO_OP:

                                obj_desc->integer.value = 0;
                                break;

                        case AML_ONE_OP:

                                obj_desc->integer.value = 1;
                                break;

                        case AML_ONES_OP:

                                obj_desc->integer.value = ACPI_UINT64_MAX;

                                /* Truncate value if we are executing from a 32-bit ACPI table */

#ifndef ACPI_NO_METHOD_EXECUTION
                                acpi_ex_truncate_for32bit_table(obj_desc);
#endif
                                break;

                        case AML_REVISION_OP:

                                obj_desc->integer.value = ACPI_CA_VERSION;
                                break;

                        default:

                                ACPI_ERROR((AE_INFO,
                                            "Unknown constant opcode 0x%X",
                                            opcode));
                                status = AE_AML_OPERAND_TYPE;
                                break;
                        }
                        break;

                case AML_TYPE_LITERAL:

                        obj_desc->integer.value = op->common.value.integer;
#ifndef ACPI_NO_METHOD_EXECUTION
                        acpi_ex_truncate_for32bit_table(obj_desc);
#endif
                        break;

                default:
                        ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X",
                                    op_info->type));
                        status = AE_AML_OPERAND_TYPE;
                        break;
                }
                break;

        case ACPI_TYPE_STRING:

                obj_desc->string.pointer = op->common.value.string;
                obj_desc->string.length =
                    (u32) ACPI_STRLEN(op->common.value.string);

                /*
                 * The string is contained in the ACPI table, don't ever try
                 * to delete it
                 */
                obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
                break;

        case ACPI_TYPE_METHOD:
                break;

        case ACPI_TYPE_LOCAL_REFERENCE:

                switch (op_info->type) {
                case AML_TYPE_LOCAL_VARIABLE:

                        /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */

                        obj_desc->reference.value =
                            ((u32)opcode) - AML_LOCAL_OP;
                        obj_desc->reference.class = ACPI_REFCLASS_LOCAL;

#ifndef ACPI_NO_METHOD_EXECUTION
                        status =
                            acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
                                                         obj_desc->reference.
                                                         value, walk_state,
                                                         ACPI_CAST_INDIRECT_PTR
                                                         (struct
                                                          acpi_namespace_node,
                                                          &obj_desc->reference.
                                                          object));
#endif
                        break;

                case AML_TYPE_METHOD_ARGUMENT:

                        /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */

                        obj_desc->reference.value = ((u32)opcode) - AML_ARG_OP;
                        obj_desc->reference.class = ACPI_REFCLASS_ARG;

#ifndef ACPI_NO_METHOD_EXECUTION
                        status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
                                                              obj_desc->
                                                              reference.value,
                                                              walk_state,
                                                              ACPI_CAST_INDIRECT_PTR
                                                              (struct
                                                               acpi_namespace_node,
                                                               &obj_desc->
                                                               reference.
                                                               object));
#endif
                        break;

                default:        /* Object name or Debug object */

                        switch (op->common.aml_opcode) {
                        case AML_INT_NAMEPATH_OP:

                                /* Node was saved in Op */

                                obj_desc->reference.node = op->common.node;
                                obj_desc->reference.object =
                                    op->common.node->object;
                                obj_desc->reference.class = ACPI_REFCLASS_NAME;
                                break;

                        case AML_DEBUG_OP:

                                obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
                                break;

                        default:

                                ACPI_ERROR((AE_INFO,
                                            "Unimplemented reference type for AML opcode: 0x%4.4X",
                                            opcode));
                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
                        }
                        break;
                }
                break;

        default:

                ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X",
                            obj_desc->common.type));

                status = AE_AML_OPERAND_TYPE;
                break;
        }

        return_ACPI_STATUS(status);
}