exstoren.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:7k
- /******************************************************************************
- *
- * Module Name: exstoren - AML Interpreter object store support,
- * Store to Node (namespace object)
- * $Revision: 40 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 R. Byron Moore
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include "acpi.h"
- #include "acparser.h"
- #include "acdispat.h"
- #include "acinterp.h"
- #include "amlcode.h"
- #include "acnamesp.h"
- #include "actables.h"
- #define _COMPONENT ACPI_EXECUTER
- 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 (
- acpi_operand_object **source_desc_ptr,
- acpi_object_type8 target_type,
- acpi_walk_state *walk_state)
- {
- acpi_operand_object *source_desc = *source_desc_ptr;
- acpi_status status = AE_OK;
- FUNCTION_TRACE ("Ex_resolve_object");
- /*
- * Ensure we have a Source that can be stored in the target
- */
- switch (target_type) {
- /* This case handles the "interchangeable" types Integer, String, and Buffer. */
- /*
- * These cases all require only Integers or values that
- * can be converted to Integers (Strings or Buffers)
- */
- case ACPI_TYPE_BUFFER_FIELD:
- case INTERNAL_TYPE_REGION_FIELD:
- case INTERNAL_TYPE_BANK_FIELD:
- case INTERNAL_TYPE_INDEX_FIELD:
- /*
- * Stores into a Field/Region or into a Buffer/String
- * are all essentially the same.
- */
- case ACPI_TYPE_INTEGER:
- case ACPI_TYPE_STRING:
- case ACPI_TYPE_BUFFER:
- /* TBD: FIX - check for source==REF, resolve, then check type */
- /*
- * If Source_desc is not a valid type, try to resolve it to one.
- */
- if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&
- (source_desc->common.type != ACPI_TYPE_BUFFER) &&
- (source_desc->common.type != ACPI_TYPE_STRING)) {
- /*
- * Initially not a valid type, convert
- */
- status = acpi_ex_resolve_to_value (source_desc_ptr, walk_state);
- if (ACPI_SUCCESS (status) &&
- (source_desc->common.type != ACPI_TYPE_INTEGER) &&
- (source_desc->common.type != ACPI_TYPE_BUFFER) &&
- (source_desc->common.type != ACPI_TYPE_STRING)) {
- /*
- * Conversion successful but still not a valid type
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Cannot assign type %s to %s (must be type Int/Str/Buf)n",
- acpi_ut_get_type_name ((*source_desc_ptr)->common.type),
- acpi_ut_get_type_name (target_type)));
- status = AE_AML_OPERAND_TYPE;
- }
- }
- break;
- case INTERNAL_TYPE_ALIAS:
- /*
- * Aliases are resolved by Acpi_ex_prep_operands
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into Alias - should never happenn"));
- status = AE_AML_INTERNAL;
- break;
- case ACPI_TYPE_PACKAGE:
- default:
- /*
- * All other types than Alias and the various Fields come here,
- * including the untyped case - ACPI_TYPE_ANY.
- */
- break;
- }
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ex_store_object
- *
- * PARAMETERS: Source_desc - Object to store
- * Target_type - Current type of the target
- * Target_desc_ptr - Pointer to the target
- * Walk_state - Current walk state
- *
- * RETURN: Status
- *
- * DESCRIPTION: "Store" an object to another object. This may include
- * converting the source type to the target type (implicit
- * conversion), and a copy of the value of the source to
- * the target.
- *
- ******************************************************************************/
- acpi_status
- acpi_ex_store_object (
- acpi_operand_object *source_desc,
- acpi_object_type8 target_type,
- acpi_operand_object **target_desc_ptr,
- acpi_walk_state *walk_state)
- {
- acpi_operand_object *target_desc = *target_desc_ptr;
- acpi_status status = AE_OK;
- FUNCTION_TRACE ("Ex_store_object");
- /*
- * Perform the "implicit conversion" of the source to the current type
- * of the target - As per the ACPI specification.
- *
- * If no conversion performed, Source_desc is left alone, otherwise it
- * is updated with a new object.
- */
- status = acpi_ex_convert_to_target_type (target_type, &source_desc, walk_state);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
- /*
- * We now have two objects of identical types, and we can perform a
- * copy of the *value* of the source object.
- */
- switch (target_type) {
- case ACPI_TYPE_ANY:
- case INTERNAL_TYPE_DEF_ANY:
- /*
- * The target namespace node is uninitialized (has no target object),
- * and will take on the type of the source object
- */
- *target_desc_ptr = source_desc;
- break;
- case ACPI_TYPE_INTEGER:
- target_desc->integer.value = source_desc->integer.value;
- /* Truncate value if we are executing from a 32-bit ACPI table */
- acpi_ex_truncate_for32bit_table (target_desc, walk_state);
- break;
- case ACPI_TYPE_STRING:
- status = acpi_ex_copy_string_to_string (source_desc, target_desc);
- break;
- case ACPI_TYPE_BUFFER:
- status = acpi_ex_copy_buffer_to_buffer (source_desc, target_desc);
- break;
- case ACPI_TYPE_PACKAGE:
- /*
- * TBD: [Unhandled] Not real sure what to do here
- */
- status = AE_NOT_IMPLEMENTED;
- break;
- default:
- /*
- * All other types come here.
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into type %s not implementedn",
- acpi_ut_get_type_name (target_type)));
- status = AE_NOT_IMPLEMENTED;
- break;
- }
- return_ACPI_STATUS (status);
- }