summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/executer/exresnte.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/executer/exresnte.c')
-rw-r--r--drivers/acpi/executer/exresnte.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exresnte.c b/drivers/acpi/executer/exresnte.c
new file mode 100644
index 000000000000..7936329a0e35
--- /dev/null
+++ b/drivers/acpi/executer/exresnte.c
@@ -0,0 +1,289 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresnte - AML Interpreter object resolution
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, 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/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acparser.h>
+#include <acpi/amlcode.h>
+
+
+#define _COMPONENT ACPI_EXECUTER
+ ACPI_MODULE_NAME ("exresnte")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_resolve_node_to_value
+ *
+ * PARAMETERS: object_ptr - Pointer to a location that contains
+ * a pointer to a NS node, and will receive a
+ * pointer to the resolved object.
+ * walk_state - Current state. Valid only if executing AML
+ * code. NULL if simply resolving an object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Resolve a Namespace node to a valued object
+ *
+ * Note: for some of the data types, the pointer attached to the Node
+ * can be either a pointer to an actual internal object or a pointer into the
+ * AML stream itself. These types are currently:
+ *
+ * ACPI_TYPE_INTEGER
+ * ACPI_TYPE_STRING
+ * ACPI_TYPE_BUFFER
+ * ACPI_TYPE_MUTEX
+ * ACPI_TYPE_PACKAGE
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_node_to_value (
+ struct acpi_namespace_node **object_ptr,
+ struct acpi_walk_state *walk_state)
+
+{
+ acpi_status status = AE_OK;
+ union acpi_operand_object *source_desc;
+ union acpi_operand_object *obj_desc = NULL;
+ struct acpi_namespace_node *node;
+ acpi_object_type entry_type;
+
+
+ ACPI_FUNCTION_TRACE ("ex_resolve_node_to_value");
+
+
+ /*
+ * The stack pointer points to a struct acpi_namespace_node (Node). Get the
+ * object that is attached to the Node.
+ */
+ node = *object_ptr;
+ source_desc = acpi_ns_get_attached_object (node);
+ entry_type = acpi_ns_get_type ((acpi_handle) node);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p source_desc=%p [%s]\n",
+ node, source_desc, acpi_ut_get_type_name (entry_type)));
+
+ if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) ||
+ (entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
+ /* There is always exactly one level of indirection */
+
+ node = ACPI_CAST_PTR (struct acpi_namespace_node, node->object);
+ source_desc = acpi_ns_get_attached_object (node);
+ entry_type = acpi_ns_get_type ((acpi_handle) node);
+ *object_ptr = node;
+ }
+
+ /*
+ * Several object types require no further processing:
+ * 1) Devices rarely have an attached object, return the Node
+ * 2) Method locals and arguments have a pseudo-Node
+ */
+ if (entry_type == ACPI_TYPE_DEVICE ||
+ (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
+ return_ACPI_STATUS (AE_OK);
+ }
+
+ if (!source_desc) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n",
+ node));
+ return_ACPI_STATUS (AE_AML_NO_OPERAND);
+ }
+
+ /*
+ * Action is based on the type of the Node, which indicates the type
+ * of the attached object or pointer
+ */
+ switch (entry_type) {
+ case ACPI_TYPE_PACKAGE:
+
+ if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_PACKAGE) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n",
+ acpi_ut_get_object_type_name (source_desc)));
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+
+ status = acpi_ds_get_package_arguments (source_desc);
+ if (ACPI_SUCCESS (status)) {
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference (obj_desc);
+ }
+ break;
+
+
+ case ACPI_TYPE_BUFFER:
+
+ if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_BUFFER) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n",
+ acpi_ut_get_object_type_name (source_desc)));
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+
+ status = acpi_ds_get_buffer_arguments (source_desc);
+ if (ACPI_SUCCESS (status)) {
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference (obj_desc);
+ }
+ break;
+
+
+ case ACPI_TYPE_STRING:
+
+ if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_STRING) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n",
+ acpi_ut_get_object_type_name (source_desc)));
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ case ACPI_TYPE_INTEGER:
+
+ if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_INTEGER) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n",
+ acpi_ut_get_object_type_name (source_desc)));
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ case ACPI_TYPE_BUFFER_FIELD:
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+ case ACPI_TYPE_LOCAL_BANK_FIELD:
+ case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "field_read Node=%p source_desc=%p Type=%X\n",
+ node, source_desc, entry_type));
+
+ status = acpi_ex_read_data_from_field (walk_state, source_desc, &obj_desc);
+ break;
+
+ /*
+ * For these objects, just return the object attached to the Node
+ */
+ case ACPI_TYPE_MUTEX:
+ case ACPI_TYPE_METHOD:
+ case ACPI_TYPE_POWER:
+ case ACPI_TYPE_PROCESSOR:
+ case ACPI_TYPE_THERMAL:
+ case ACPI_TYPE_EVENT:
+ case ACPI_TYPE_REGION:
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+
+ /* TYPE_ANY is untyped, and thus there is no object associated with it */
+
+ case ACPI_TYPE_ANY:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n",
+ node));
+
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
+
+
+ case ACPI_TYPE_LOCAL_REFERENCE:
+
+ switch (source_desc->reference.opcode) {
+ case AML_LOAD_OP:
+
+ /* This is a ddb_handle */
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference (obj_desc);
+ break;
+
+ default:
+ /* No named references are allowed here */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported Reference opcode %X (%s)\n",
+ source_desc->reference.opcode,
+ acpi_ps_get_opcode_name (source_desc->reference.opcode)));
+
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+ break;
+
+
+ /* Default case is for unknown types */
+
+ default:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n",
+ node, entry_type));
+
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+
+ } /* switch (entry_type) */
+
+
+ /* Put the object descriptor on the stack */
+
+ *object_ptr = (void *) obj_desc;
+ return_ACPI_STATUS (status);
+}
+
+