--- /dev/null
+
+/******************************************************************************
+ *
+ * Module Name: exstoren - AML Interpreter object store support,
+ * Store to Node (namespace object)
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h>
+#include <acpi/acinterp.h>
+#include <acpi/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 (ACPI_GET_OBJECT_TYPE(source_desc) ==
+ 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_OP) {
+ break;
+ }
+
+ /* Must have a Integer, Buffer, or String */
+
+ if ((ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_INTEGER) &&
+ (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_BUFFER) &&
+ (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_STRING) &&
+ !((ACPI_GET_OBJECT_TYPE(source_desc) ==
+ 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),
+ acpi_ut_get_type_name(target_type)));
+ status = AE_AML_OPERAND_TYPE;
+ }
+ break;
+
+ case ACPI_TYPE_LOCAL_ALIAS:
+ case ACPI_TYPE_LOCAL_METHOD_ALIAS:
+
+ /*
+ * All aliases should have been resolved earlier, during the
+ * operand resolution phase.
+ */
+ ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));
+ 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_to_object
+ *
+ * PARAMETERS: source_desc - Object to store
+ * dest_desc - Object to receive a copy of the source
+ * new_desc - New object if dest_desc is obsoleted
+ * 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.
+ *
+ * The Assignment of an object to another (not named) object
+ * is handled here.
+ * The Source passed in will replace the current value (if any)
+ * with the input value.
+ *
+ * When storing into an object the data is converted to the
+ * target object type then stored in the object. This means
+ * that the target object type (for an initialized target) will
+ * not be changed by a store operation.
+ *
+ * This module allows destination types of Number, String,
+ * Buffer, and Package.
+ *
+ * Assumes parameters are already validated. NOTE: source_desc
+ * resolution (from a reference object) must be performed by
+ * the caller if necessary.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_store_object_to_object(union acpi_operand_object *source_desc,
+ union acpi_operand_object *dest_desc,
+ union acpi_operand_object **new_desc,
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_operand_object *actual_src_desc;
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);
+
+ actual_src_desc = source_desc;
+ if (!dest_desc) {
+ /*
+ * There is no destination object (An uninitialized node or
+ * package element), so we can simply copy the source object
+ * creating a new destination object
+ */
+ status =
+ acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,
+ walk_state);
+ return_ACPI_STATUS(status);
+ }
+
+ if (ACPI_GET_OBJECT_TYPE(source_desc) !=
+ ACPI_GET_OBJECT_TYPE(dest_desc)) {
+ /*
+ * The source type does not match the type of the destination.
+ * Perform the "implicit conversion" of the source to the current type
+ * of the target as per the ACPI specification.
+ *
+ * If no conversion performed, actual_src_desc = source_desc.
+ * Otherwise, actual_src_desc is a temporary object to hold the
+ * converted object.
+ */
+ status =
+ acpi_ex_convert_to_target_type(ACPI_GET_OBJECT_TYPE
+ (dest_desc), source_desc,
+ &actual_src_desc,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (source_desc == actual_src_desc) {
+ /*
+ * No conversion was performed. Return the source_desc as the
+ * new object.
+ */
+ *new_desc = source_desc;
+ return_ACPI_STATUS(AE_OK);
+ }
+ }
+
+ /*
+ * We now have two objects of identical types, and we can perform a
+ * copy of the *value* of the source object.
+ */
+ switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
+ case ACPI_TYPE_INTEGER:
+
+ dest_desc->integer.value = actual_src_desc->integer.value;
+
+ /* Truncate value if we are executing from a 32-bit ACPI table */
+
+ acpi_ex_truncate_for32bit_table(dest_desc);
+ break;
+
+ case ACPI_TYPE_STRING:
+
+ status =
+ acpi_ex_store_string_to_string(actual_src_desc, dest_desc);
+ break;
+
+ case ACPI_TYPE_BUFFER:
+
+ status =
+ acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);
+ break;
+
+ case ACPI_TYPE_PACKAGE:
+
+ status =
+ acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,
+ walk_state);
+ break;
+
+ default:
+ /*
+ * All other types come here.
+ */
+ ACPI_WARNING((AE_INFO, "Store into type %s not implemented",
+ acpi_ut_get_object_type_name(dest_desc)));
+
+ status = AE_NOT_IMPLEMENTED;
+ break;
+ }
+
+ if (actual_src_desc != source_desc) {
+
+ /* Delete the intermediate (temporary) source object */
+
+ acpi_ut_remove_reference(actual_src_desc);
+ }
+
+ *new_desc = dest_desc;
+ return_ACPI_STATUS(status);
+}
projects / mv-sheeva.git / blobdiff