1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exresnte.c b/drivers/acpi/acpica/exresnte.c
new file mode 100644
index 000000000000..77df6e490e70
--- /dev/null
+++ b/drivers/acpi/acpica/exresnte.c
@@ -0,0 +1,278 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresnte - AML Interpreter object resolution
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.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 SourceDesc=%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) Device/Thermal objects don't have a "real" subobject, return the Node
+	 * 2) Method locals and arguments have a pseudo-Node
+	 * 3) 10/2007: Added method type to assist with Package construction.
+	 */
+	if ((entry_type == ACPI_TYPE_DEVICE) ||
+	    (entry_type == ACPI_TYPE_THERMAL) ||
+	    (entry_type == ACPI_TYPE_METHOD) ||
+	    (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	if (!source_desc) {
+		ACPI_ERROR((AE_INFO, "No object attached to node %p", 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_ERROR((AE_INFO, "Object not a Package, type %s",
+				    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_ERROR((AE_INFO, "Object not a Buffer, type %s",
+				    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_ERROR((AE_INFO, "Object not a String, type %s",
+				    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_ERROR((AE_INFO, "Object not a Integer, type %s",
+				    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,
+				  "FieldRead Node=%p SourceDesc=%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_POWER:
+	case ACPI_TYPE_PROCESSOR:
+	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_ERROR((AE_INFO,
+			    "Untyped entry %p, no attached object!", node));
+
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);	/* Cannot be AE_TYPE */
+
+	case ACPI_TYPE_LOCAL_REFERENCE:
+
+		switch (source_desc->reference.class) {
+		case ACPI_REFCLASS_TABLE:	/* This is a ddb_handle */
+		case ACPI_REFCLASS_REFOF:
+		case ACPI_REFCLASS_INDEX:
+
+			/* 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_ERROR((AE_INFO,
+				    "Unsupported Reference type %X",
+				    source_desc->reference.class));
+
+			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+		}
+		break;
+
+	default:
+
+		/* Default case is for unknown types */
+
+		ACPI_ERROR((AE_INFO,
+			    "Node %p - Unknown object type %X",
+			    node, entry_type));
+
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+
+	}			/* switch (entry_type) */
+
+	/* Return the object descriptor */
+
+	*object_ptr = (void *)obj_desc;
+	return_ACPI_STATUS(status);
+}