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dswload.c

/******************************************************************************
 *
 * Module Name: dswload - Dispatcher namespace load callbacks
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2007, R. Byron Moore
 * 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 <acpi/acparser.h>
#include <acpi/amlcode.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>

#ifdef ACPI_ASL_COMPILER
#include <acpi/acdisasm.h>
#endif

#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dswload")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_init_callbacks
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *              pass_number     - 1, 2, or 3
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Init walk state callbacks
 *
 ******************************************************************************/
acpi_status
acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
{

      switch (pass_number) {
      case 1:
            walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
                ACPI_PARSE_DELETE_TREE;
            walk_state->descending_callback = acpi_ds_load1_begin_op;
            walk_state->ascending_callback = acpi_ds_load1_end_op;
            break;

      case 2:
            walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
                ACPI_PARSE_DELETE_TREE;
            walk_state->descending_callback = acpi_ds_load2_begin_op;
            walk_state->ascending_callback = acpi_ds_load2_end_op;
            break;

      case 3:
#ifndef ACPI_NO_METHOD_EXECUTION
            walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
                ACPI_PARSE_DELETE_TREE;
            walk_state->descending_callback = acpi_ds_exec_begin_op;
            walk_state->ascending_callback = acpi_ds_exec_end_op;
#endif
            break;

      default:
            return (AE_BAD_PARAMETER);
      }

      return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load1_begin_op
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *              out_op          - Where to return op if a new one is created
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 *
 ******************************************************************************/

acpi_status
acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state,
                   union acpi_parse_object ** out_op)
{
      union acpi_parse_object *op;
      struct acpi_namespace_node *node;
      acpi_status status;
      acpi_object_type object_type;
      char *path;
      u32 flags;

      ACPI_FUNCTION_TRACE(ds_load1_begin_op);

      op = walk_state->op;
      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
                    walk_state));

      /* We are only interested in opcodes that have an associated name */

      if (op) {
            if (!(walk_state->op_info->flags & AML_NAMED)) {
                  *out_op = op;
                  return_ACPI_STATUS(AE_OK);
            }

            /* Check if this object has already been installed in the namespace */

            if (op->common.node) {
                  *out_op = op;
                  return_ACPI_STATUS(AE_OK);
            }
      }

      path = acpi_ps_get_next_namestring(&walk_state->parser_state);

      /* Map the raw opcode into an internal object type */

      object_type = walk_state->op_info->object_type;

      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                    "State=%p Op=%p [%s]\n", walk_state, op,
                    acpi_ut_get_type_name(object_type)));

      switch (walk_state->opcode) {
      case AML_SCOPE_OP:

            /*
             * The target name of the Scope() operator must exist at this point so
             * that we can actually open the scope to enter new names underneath it.
             * Allow search-to-root for single namesegs.
             */
            status =
                acpi_ns_lookup(walk_state->scope_info, path, object_type,
                           ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
                           walk_state, &(node));
#ifdef ACPI_ASL_COMPILER
            if (status == AE_NOT_FOUND) {
                  /*
                   * Table disassembly:
                   * Target of Scope() not found. Generate an External for it, and
                   * insert the name into the namespace.
                   */
                  acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0);
                  status =
                      acpi_ns_lookup(walk_state->scope_info, path,
                                 object_type, ACPI_IMODE_LOAD_PASS1,
                                 ACPI_NS_SEARCH_PARENT, walk_state,
                                 &node);
            }
#endif
            if (ACPI_FAILURE(status)) {
                  ACPI_ERROR_NAMESPACE(path, status);
                  return_ACPI_STATUS(status);
            }

            /*
             * Check to make sure that the target is
             * one of the opcodes that actually opens a scope
             */
            switch (node->type) {
            case ACPI_TYPE_ANY:
            case ACPI_TYPE_LOCAL_SCOPE:   /* Scope  */
            case ACPI_TYPE_DEVICE:
            case ACPI_TYPE_POWER:
            case ACPI_TYPE_PROCESSOR:
            case ACPI_TYPE_THERMAL:

                  /* These are acceptable types */
                  break;

            case ACPI_TYPE_INTEGER:
            case ACPI_TYPE_STRING:
            case ACPI_TYPE_BUFFER:

                  /*
                   * These types we will allow, but we will change the type. This
                   * enables some existing code of the form:
                   *
                   *  Name (DEB, 0)
                   *  Scope (DEB) { ... }
                   *
                   * Note: silently change the type here. On the second pass, we will report
                   * a warning
                   */
                  ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
                                path,
                                acpi_ut_get_type_name(node->type)));

                  node->type = ACPI_TYPE_ANY;
                  walk_state->scope_info->common.value = ACPI_TYPE_ANY;
                  break;

            default:

                  /* All other types are an error */

                  ACPI_ERROR((AE_INFO,
                            "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
                            acpi_ut_get_type_name(node->type), path));

                  return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
            }
            break;

      default:
            /*
             * For all other named opcodes, we will enter the name into
             * the namespace.
             *
             * Setup the search flags.
             * Since we are entering a name into the namespace, we do not want to
             * enable the search-to-root upsearch.
             *
             * There are only two conditions where it is acceptable that the name
             * already exists:
             *    1) the Scope() operator can reopen a scoping object that was
             *       previously defined (Scope, Method, Device, etc.)
             *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
             *       buffer_field, or Package), the name of the object is already
             *       in the namespace.
             */
            if (walk_state->deferred_node) {

                  /* This name is already in the namespace, get the node */

                  node = walk_state->deferred_node;
                  status = AE_OK;
                  break;
            }

            /*
             * If we are executing a method, do not create any namespace objects
             * during the load phase, only during execution.
             */
            if (walk_state->method_node) {
                  node = NULL;
                  status = AE_OK;
                  break;
            }

            flags = ACPI_NS_NO_UPSEARCH;
            if ((walk_state->opcode != AML_SCOPE_OP) &&
                (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
                  flags |= ACPI_NS_ERROR_IF_FOUND;
                  ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                "[%s] Cannot already exist\n",
                                acpi_ut_get_type_name(object_type)));
            } else {
                  ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                "[%s] Both Find or Create allowed\n",
                                acpi_ut_get_type_name(object_type)));
            }

            /*
             * Enter the named type into the internal namespace. We enter the name
             * as we go downward in the parse tree. Any necessary subobjects that
             * involve arguments to the opcode must be created as we go back up the
             * parse tree later.
             */
            status =
                acpi_ns_lookup(walk_state->scope_info, path, object_type,
                           ACPI_IMODE_LOAD_PASS1, flags, walk_state,
                           &node);
            if (ACPI_FAILURE(status)) {
                  if (status == AE_ALREADY_EXISTS) {

                        /* The name already exists in this scope */

                        if (node->flags & ANOBJ_IS_EXTERNAL) {
                              /*
                               * Allow one create on an object or segment that was
                               * previously declared External
                               */
                              node->flags &= ~ANOBJ_IS_EXTERNAL;
                              node->type = (u8) object_type;

                              /* Just retyped a node, probably will need to open a scope */

                              if (acpi_ns_opens_scope(object_type)) {
                                    status =
                                        acpi_ds_scope_stack_push
                                        (node, object_type,
                                         walk_state);
                                    if (ACPI_FAILURE(status)) {
                                          return_ACPI_STATUS
                                              (status);
                                    }
                              }

                              status = AE_OK;
                        }
                  }

                  if (ACPI_FAILURE(status)) {
                        ACPI_ERROR_NAMESPACE(path, status);
                        return_ACPI_STATUS(status);
                  }
            }
            break;
      }

      /* Common exit */

      if (!op) {

            /* Create a new op */

            op = acpi_ps_alloc_op(walk_state->opcode);
            if (!op) {
                  return_ACPI_STATUS(AE_NO_MEMORY);
            }
      }

      /* Initialize the op */

#if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
      op->named.path = ACPI_CAST_PTR(u8, path);
#endif

      if (node) {
            /*
             * Put the Node in the "op" object that the parser uses, so we
             * can get it again quickly when this scope is closed
             */
            op->common.node = node;
            op->named.name = node->name.integer;
      }

      acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
                     op);
      *out_op = op;
      return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load1_end_op
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Ascending callback used during the loading of the namespace,
 *              both control methods and everything else.
 *
 ******************************************************************************/

acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
{
      union acpi_parse_object *op;
      acpi_object_type object_type;
      acpi_status status = AE_OK;

      ACPI_FUNCTION_TRACE(ds_load1_end_op);

      op = walk_state->op;
      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
                    walk_state));

      /* We are only interested in opcodes that have an associated name */

      if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
            return_ACPI_STATUS(AE_OK);
      }

      /* Get the object type to determine if we should pop the scope */

      object_type = walk_state->op_info->object_type;

#ifndef ACPI_NO_METHOD_EXECUTION
      if (walk_state->op_info->flags & AML_FIELD) {
            /*
             * If we are executing a method, do not create any namespace objects
             * during the load phase, only during execution.
             */
            if (!walk_state->method_node) {
                  if (walk_state->opcode == AML_FIELD_OP ||
                      walk_state->opcode == AML_BANK_FIELD_OP ||
                      walk_state->opcode == AML_INDEX_FIELD_OP) {
                        status =
                            acpi_ds_init_field_objects(op, walk_state);
                  }
            }
            return_ACPI_STATUS(status);
      }

      /*
       * If we are executing a method, do not create any namespace objects
       * during the load phase, only during execution.
       */
      if (!walk_state->method_node) {
            if (op->common.aml_opcode == AML_REGION_OP) {
                  status =
                      acpi_ex_create_region(op->named.data,
                                      op->named.length,
                                      (acpi_adr_space_type) ((op->
                                                        common.
                                                        value.
                                                        arg)->
                                                       common.
                                                       value.
                                                       integer),
                                      walk_state);
                  if (ACPI_FAILURE(status)) {
                        return_ACPI_STATUS(status);
                  }
            }
      }
#endif

      if (op->common.aml_opcode == AML_NAME_OP) {

            /* For Name opcode, get the object type from the argument */

            if (op->common.value.arg) {
                  object_type = (acpi_ps_get_opcode_info((op->common.
                                                value.arg)->
                                                 common.
                                                 aml_opcode))->
                      object_type;

                  /* Set node type if we have a namespace node */

                  if (op->common.node) {
                        op->common.node->type = (u8) object_type;
                  }
            }
      }

      /*
       * If we are executing a method, do not create any namespace objects
       * during the load phase, only during execution.
       */
      if (!walk_state->method_node) {
            if (op->common.aml_opcode == AML_METHOD_OP) {
                  /*
                   * method_op pkg_length name_string method_flags term_list
                   *
                   * Note: We must create the method node/object pair as soon as we
                   * see the method declaration. This allows later pass1 parsing
                   * of invocations of the method (need to know the number of
                   * arguments.)
                   */
                  ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
                                walk_state, op, op->named.node));

                  if (!acpi_ns_get_attached_object(op->named.node)) {
                        walk_state->operands[0] =
                            ACPI_CAST_PTR(void, op->named.node);
                        walk_state->num_operands = 1;

                        status =
                            acpi_ds_create_operands(walk_state,
                                              op->common.value.
                                              arg);
                        if (ACPI_SUCCESS(status)) {
                              status =
                                  acpi_ex_create_method(op->named.
                                                  data,
                                                  op->named.
                                                  length,
                                                  walk_state);
                        }

                        walk_state->operands[0] = NULL;
                        walk_state->num_operands = 0;

                        if (ACPI_FAILURE(status)) {
                              return_ACPI_STATUS(status);
                        }
                  }
            }
      }

      /* Pop the scope stack (only if loading a table) */

      if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
            ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                          "(%s): Popping scope for Op %p\n",
                          acpi_ut_get_type_name(object_type), op));

            status = acpi_ds_scope_stack_pop(walk_state);
      }

      return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load2_begin_op
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *              out_op          - Wher to return op if a new one is created
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 *
 ******************************************************************************/

acpi_status
acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
                   union acpi_parse_object **out_op)
{
      union acpi_parse_object *op;
      struct acpi_namespace_node *node;
      acpi_status status;
      acpi_object_type object_type;
      char *buffer_ptr;
      u32 flags;

      ACPI_FUNCTION_TRACE(ds_load2_begin_op);

      op = walk_state->op;
      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
                    walk_state));

      if (op) {
            if ((walk_state->control_state) &&
                (walk_state->control_state->common.state ==
                 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {

                  /* We are executing a while loop outside of a method */

                  status = acpi_ds_exec_begin_op(walk_state, out_op);
                  return_ACPI_STATUS(status);
            }

            /* We only care about Namespace opcodes here */

            if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
                 (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
                (!(walk_state->op_info->flags & AML_NAMED))) {
#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
                  if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
                      (walk_state->op_info->class == AML_CLASS_CONTROL)) {
                        ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                      "Begin/EXEC: %s (fl %8.8X)\n",
                                      walk_state->op_info->name,
                                      walk_state->op_info->flags));

                        /* Executing a type1 or type2 opcode outside of a method */

                        status =
                            acpi_ds_exec_begin_op(walk_state, out_op);
                        return_ACPI_STATUS(status);
                  }
#endif
                  return_ACPI_STATUS(AE_OK);
            }

            /* Get the name we are going to enter or lookup in the namespace */

            if (walk_state->opcode == AML_INT_NAMEPATH_OP) {

                  /* For Namepath op, get the path string */

                  buffer_ptr = op->common.value.string;
                  if (!buffer_ptr) {

                        /* No name, just exit */

                        return_ACPI_STATUS(AE_OK);
                  }
            } else {
                  /* Get name from the op */

                  buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
            }
      } else {
            /* Get the namestring from the raw AML */

            buffer_ptr =
                acpi_ps_get_next_namestring(&walk_state->parser_state);
      }

      /* Map the opcode into an internal object type */

      object_type = walk_state->op_info->object_type;

      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                    "State=%p Op=%p Type=%X\n", walk_state, op,
                    object_type));

      switch (walk_state->opcode) {
      case AML_FIELD_OP:
      case AML_BANK_FIELD_OP:
      case AML_INDEX_FIELD_OP:

            node = NULL;
            status = AE_OK;
            break;

      case AML_INT_NAMEPATH_OP:
            /*
             * The name_path is an object reference to an existing object.
             * Don't enter the name into the namespace, but look it up
             * for use later.
             */
            status =
                acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
                           object_type, ACPI_IMODE_EXECUTE,
                           ACPI_NS_SEARCH_PARENT, walk_state, &(node));
            break;

      case AML_SCOPE_OP:
            /*
             * The Path is an object reference to an existing object.
             * Don't enter the name into the namespace, but look it up
             * for use later.
             */
            status =
                acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
                           object_type, ACPI_IMODE_EXECUTE,
                           ACPI_NS_SEARCH_PARENT, walk_state, &(node));
            if (ACPI_FAILURE(status)) {
#ifdef ACPI_ASL_COMPILER
                  if (status == AE_NOT_FOUND) {
                        status = AE_OK;
                  } else {
                        ACPI_ERROR_NAMESPACE(buffer_ptr, status);
                  }
#else
                  ACPI_ERROR_NAMESPACE(buffer_ptr, status);
#endif
                  return_ACPI_STATUS(status);
            }

            /*
             * We must check to make sure that the target is
             * one of the opcodes that actually opens a scope
             */
            switch (node->type) {
            case ACPI_TYPE_ANY:
            case ACPI_TYPE_LOCAL_SCOPE:   /* Scope */
            case ACPI_TYPE_DEVICE:
            case ACPI_TYPE_POWER:
            case ACPI_TYPE_PROCESSOR:
            case ACPI_TYPE_THERMAL:

                  /* These are acceptable types */
                  break;

            case ACPI_TYPE_INTEGER:
            case ACPI_TYPE_STRING:
            case ACPI_TYPE_BUFFER:

                  /*
                   * These types we will allow, but we will change the type. This
                   * enables some existing code of the form:
                   *
                   *  Name (DEB, 0)
                   *  Scope (DEB) { ... }
                   */
                  ACPI_WARNING((AE_INFO,
                              "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
                              buffer_ptr,
                              acpi_ut_get_type_name(node->type)));

                  node->type = ACPI_TYPE_ANY;
                  walk_state->scope_info->common.value = ACPI_TYPE_ANY;
                  break;

            default:

                  /* All other types are an error */

                  ACPI_ERROR((AE_INFO,
                            "Invalid type (%s) for target of Scope operator [%4.4s]",
                            acpi_ut_get_type_name(node->type),
                            buffer_ptr));

                  return (AE_AML_OPERAND_TYPE);
            }
            break;

      default:

            /* All other opcodes */

            if (op && op->common.node) {

                  /* This op/node was previously entered into the namespace */

                  node = op->common.node;

                  if (acpi_ns_opens_scope(object_type)) {
                        status =
                            acpi_ds_scope_stack_push(node, object_type,
                                               walk_state);
                        if (ACPI_FAILURE(status)) {
                              return_ACPI_STATUS(status);
                        }
                  }

                  return_ACPI_STATUS(AE_OK);
            }

            /*
             * Enter the named type into the internal namespace. We enter the name
             * as we go downward in the parse tree. Any necessary subobjects that
             * involve arguments to the opcode must be created as we go back up the
             * parse tree later.
             *
             * Note: Name may already exist if we are executing a deferred opcode.
             */
            if (walk_state->deferred_node) {

                  /* This name is already in the namespace, get the node */

                  node = walk_state->deferred_node;
                  status = AE_OK;
                  break;
            }

            flags = ACPI_NS_NO_UPSEARCH;
            if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {

                  /* Execution mode, node cannot already exist, node is temporary */

                  flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
            }

            /* Add new entry or lookup existing entry */

            status =
                acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
                           object_type, ACPI_IMODE_LOAD_PASS2, flags,
                           walk_state, &node);
            break;
      }

      if (ACPI_FAILURE(status)) {
            ACPI_ERROR_NAMESPACE(buffer_ptr, status);
            return_ACPI_STATUS(status);
      }

      if (!op) {

            /* Create a new op */

            op = acpi_ps_alloc_op(walk_state->opcode);
            if (!op) {
                  return_ACPI_STATUS(AE_NO_MEMORY);
            }

            /* Initialize the new op */

            if (node) {
                  op->named.name = node->name.integer;
            }
            *out_op = op;
      }

      /*
       * Put the Node in the "op" object that the parser uses, so we
       * can get it again quickly when this scope is closed
       */
      op->common.node = node;
      return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load2_end_op
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Ascending callback used during the loading of the namespace,
 *              both control methods and everything else.
 *
 ******************************************************************************/

acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
{
      union acpi_parse_object *op;
      acpi_status status = AE_OK;
      acpi_object_type object_type;
      struct acpi_namespace_node *node;
      union acpi_parse_object *arg;
      struct acpi_namespace_node *new_node;
#ifndef ACPI_NO_METHOD_EXECUTION
      u32 i;
#endif

      ACPI_FUNCTION_TRACE(ds_load2_end_op);

      op = walk_state->op;
      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
                    walk_state->op_info->name, op, walk_state));

      /* Check if opcode had an associated namespace object */

      if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
#ifndef ACPI_NO_METHOD_EXECUTION
#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
            /* No namespace object. Executable opcode? */

            if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
                (walk_state->op_info->class == AML_CLASS_CONTROL)) {
                  ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                "End/EXEC:   %s (fl %8.8X)\n",
                                walk_state->op_info->name,
                                walk_state->op_info->flags));

                  /* Executing a type1 or type2 opcode outside of a method */

                  status = acpi_ds_exec_end_op(walk_state);
                  return_ACPI_STATUS(status);
            }
#endif
#endif
            return_ACPI_STATUS(AE_OK);
      }

      if (op->common.aml_opcode == AML_SCOPE_OP) {
            ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                          "Ending scope Op=%p State=%p\n", op,
                          walk_state));
      }

      object_type = walk_state->op_info->object_type;

      /*
       * Get the Node/name from the earlier lookup
       * (It was saved in the *op structure)
       */
      node = op->common.node;

      /*
       * Put the Node on the object stack (Contains the ACPI Name of
       * this object)
       */
      walk_state->operands[0] = (void *)node;
      walk_state->num_operands = 1;

      /* Pop the scope stack */

      if (acpi_ns_opens_scope(object_type) &&
          (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
            ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                          "(%s) Popping scope for Op %p\n",
                          acpi_ut_get_type_name(object_type), op));

            status = acpi_ds_scope_stack_pop(walk_state);
            if (ACPI_FAILURE(status)) {
                  goto cleanup;
            }
      }

      /*
       * Named operations are as follows:
       *
       * AML_ALIAS
       * AML_BANKFIELD
       * AML_CREATEBITFIELD
       * AML_CREATEBYTEFIELD
       * AML_CREATEDWORDFIELD
       * AML_CREATEFIELD
       * AML_CREATEQWORDFIELD
       * AML_CREATEWORDFIELD
       * AML_DATA_REGION
       * AML_DEVICE
       * AML_EVENT
       * AML_FIELD
       * AML_INDEXFIELD
       * AML_METHOD
       * AML_METHODCALL
       * AML_MUTEX
       * AML_NAME
       * AML_NAMEDFIELD
       * AML_OPREGION
       * AML_POWERRES
       * AML_PROCESSOR
       * AML_SCOPE
       * AML_THERMALZONE
       */

      ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                    "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
                    acpi_ps_get_opcode_name(op->common.aml_opcode),
                    walk_state, op, node));

      /* Decode the opcode */

      arg = op->common.value.arg;

      switch (walk_state->op_info->type) {
#ifndef ACPI_NO_METHOD_EXECUTION

      case AML_TYPE_CREATE_FIELD:
            /*
             * Create the field object, but the field buffer and index must
             * be evaluated later during the execution phase
             */
            status = acpi_ds_create_buffer_field(op, walk_state);
            break;

      case AML_TYPE_NAMED_FIELD:
            /*
             * If we are executing a method, initialize the field
             */
            if (walk_state->method_node) {
                  status = acpi_ds_init_field_objects(op, walk_state);
            }

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

                  status =
                      acpi_ds_create_index_field(op,
                                           (acpi_handle) arg->
                                           common.node, walk_state);
                  break;

            case AML_BANK_FIELD_OP:

                  status =
                      acpi_ds_create_bank_field(op, arg->common.node,
                                          walk_state);
                  break;

            case AML_FIELD_OP:

                  status =
                      acpi_ds_create_field(op, arg->common.node,
                                     walk_state);
                  break;

            default:
                  /* All NAMED_FIELD opcodes must be handled above */
                  break;
            }
            break;

      case AML_TYPE_NAMED_SIMPLE:

            status = acpi_ds_create_operands(walk_state, arg);
            if (ACPI_FAILURE(status)) {
                  goto cleanup;
            }

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

                  status = acpi_ex_create_processor(walk_state);
                  break;

            case AML_POWER_RES_OP:

                  status = acpi_ex_create_power_resource(walk_state);
                  break;

            case AML_MUTEX_OP:

                  status = acpi_ex_create_mutex(walk_state);
                  break;

            case AML_EVENT_OP:

                  status = acpi_ex_create_event(walk_state);
                  break;

            case AML_DATA_REGION_OP:

                  status = acpi_ex_create_table_region(walk_state);
                  break;

            case AML_ALIAS_OP:

                  status = acpi_ex_create_alias(walk_state);
                  break;

            default:
                  /* Unknown opcode */

                  status = AE_OK;
                  goto cleanup;
            }

            /* Delete operands */

            for (i = 1; i < walk_state->num_operands; i++) {
                  acpi_ut_remove_reference(walk_state->operands[i]);
                  walk_state->operands[i] = NULL;
            }

            break;
#endif                        /* ACPI_NO_METHOD_EXECUTION */

      case AML_TYPE_NAMED_COMPLEX:

            switch (op->common.aml_opcode) {
#ifndef ACPI_NO_METHOD_EXECUTION
            case AML_REGION_OP:

                  /*
                   * If we are executing a method, initialize the region
                   */
                  if (walk_state->method_node) {
                        status =
                            acpi_ex_create_region(op->named.data,
                                            op->named.length,
                                            (acpi_adr_space_type)
                                            ((op->common.value.
                                              arg)->common.value.
                                             integer),
                                            walk_state);
                        if (ACPI_FAILURE(status)) {
                              return (status);
                        }
                  }

                  /*
                   * The op_region is not fully parsed at this time. Only valid
                   * argument is the space_id. (We must save the address of the
                   * AML of the address and length operands)
                   */

                  /*
                   * If we have a valid region, initialize it
                   * Namespace is NOT locked at this point.
                   */
                  status =
                      acpi_ev_initialize_region
                      (acpi_ns_get_attached_object(node), FALSE);
                  if (ACPI_FAILURE(status)) {
                        /*
                         *  If AE_NOT_EXIST is returned, it is not fatal
                         *  because many regions get created before a handler
                         *  is installed for said region.
                         */
                        if (AE_NOT_EXIST == status) {
                              status = AE_OK;
                        }
                  }
                  break;

            case AML_NAME_OP:

                  status = acpi_ds_create_node(walk_state, node, op);
                  break;

            case AML_METHOD_OP:
                  /*
                   * method_op pkg_length name_string method_flags term_list
                   *
                   * Note: We must create the method node/object pair as soon as we
                   * see the method declaration. This allows later pass1 parsing
                   * of invocations of the method (need to know the number of
                   * arguments.)
                   */
                  ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
                                walk_state, op, op->named.node));

                  if (!acpi_ns_get_attached_object(op->named.node)) {
                        walk_state->operands[0] =
                            ACPI_CAST_PTR(void, op->named.node);
                        walk_state->num_operands = 1;

                        status =
                            acpi_ds_create_operands(walk_state,
                                              op->common.value.
                                              arg);
                        if (ACPI_SUCCESS(status)) {
                              status =
                                  acpi_ex_create_method(op->named.
                                                  data,
                                                  op->named.
                                                  length,
                                                  walk_state);
                        }
                        walk_state->operands[0] = NULL;
                        walk_state->num_operands = 0;

                        if (ACPI_FAILURE(status)) {
                              return_ACPI_STATUS(status);
                        }
                  }
                  break;

#endif                        /* ACPI_NO_METHOD_EXECUTION */

            default:
                  /* All NAMED_COMPLEX opcodes must be handled above */
                  break;
            }
            break;

      case AML_CLASS_INTERNAL:

            /* case AML_INT_NAMEPATH_OP: */
            break;

      case AML_CLASS_METHOD_CALL:

            ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                          "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
                          walk_state, op, node));

            /*
             * Lookup the method name and save the Node
             */
            status =
                acpi_ns_lookup(walk_state->scope_info,
                           arg->common.value.string, ACPI_TYPE_ANY,
                           ACPI_IMODE_LOAD_PASS2,
                           ACPI_NS_SEARCH_PARENT |
                           ACPI_NS_DONT_OPEN_SCOPE, walk_state,
                           &(new_node));
            if (ACPI_SUCCESS(status)) {
                  /*
                   * Make sure that what we found is indeed a method
                   * We didn't search for a method on purpose, to see if the name
                   * would resolve
                   */
                  if (new_node->type != ACPI_TYPE_METHOD) {
                        status = AE_AML_OPERAND_TYPE;
                  }

                  /* We could put the returned object (Node) on the object stack for
                   * later, but for now, we will put it in the "op" object that the
                   * parser uses, so we can get it again at the end of this scope
                   */
                  op->common.node = new_node;
            } else {
                  ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
            }
            break;

      default:
            break;
      }

      cleanup:

      /* Remove the Node pushed at the very beginning */

      walk_state->operands[0] = NULL;
      walk_state->num_operands = 0;
      return_ACPI_STATUS(status);
}

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