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);
+}
+
+