1 files changed, 546 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exresolv.c b/drivers/acpi/executer/exresolv.c
new file mode 100644
index 00000000000..7be60491115
--- /dev/null
+++ b/drivers/acpi/executer/exresolv.c
@@ -0,0 +1,546 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresolv - 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/amlcode.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acparser.h>
+
+
+#define _COMPONENT          ACPI_EXECUTER
+	 ACPI_MODULE_NAME    ("exresolv")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_to_value
+ *
+ * PARAMETERS:  **stack_ptr         - Points to entry on obj_stack, which can
+ *                                    be either an (union acpi_operand_object *)
+ *                                    or an acpi_handle.
+ *              walk_state          - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert Reference objects to values
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_to_value (
+	union acpi_operand_object       **stack_ptr,
+	struct acpi_walk_state          *walk_state)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE_PTR ("ex_resolve_to_value", stack_ptr);
+
+
+	if (!stack_ptr || !*stack_ptr) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
+		return_ACPI_STATUS (AE_AML_NO_OPERAND);
+	}
+
+	/*
+	 * The entity pointed to by the stack_ptr can be either
+	 * 1) A valid union acpi_operand_object, or
+	 * 2) A struct acpi_namespace_node (named_obj)
+	 */
+	if (ACPI_GET_DESCRIPTOR_TYPE (*stack_ptr) == ACPI_DESC_TYPE_OPERAND) {
+		status = acpi_ex_resolve_object_to_value (stack_ptr, walk_state);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/*
+	 * Object on the stack may have changed if acpi_ex_resolve_object_to_value()
+	 * was called (i.e., we can't use an _else_ here.)
+	 */
+	if (ACPI_GET_DESCRIPTOR_TYPE (*stack_ptr) == ACPI_DESC_TYPE_NAMED) {
+		status = acpi_ex_resolve_node_to_value (
+				  ACPI_CAST_INDIRECT_PTR (struct acpi_namespace_node, stack_ptr),
+				  walk_state);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr));
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_object_to_value
+ *
+ * PARAMETERS:  stack_ptr       - Pointer to a stack location that contains a
+ *                                ptr to an internal object.
+ *              walk_state      - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Retrieve the value from an internal object.  The Reference type
+ *              uses the associated AML opcode to determine the value.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_object_to_value (
+	union acpi_operand_object       **stack_ptr,
+	struct acpi_walk_state          *walk_state)
+{
+	acpi_status                     status = AE_OK;
+	union acpi_operand_object       *stack_desc;
+	void                            *temp_node;
+	union acpi_operand_object       *obj_desc;
+	u16                             opcode;
+
+
+	ACPI_FUNCTION_TRACE ("ex_resolve_object_to_value");
+
+
+	stack_desc = *stack_ptr;
+
+	/* This is an union acpi_operand_object    */
+
+	switch (ACPI_GET_OBJECT_TYPE (stack_desc)) {
+	case ACPI_TYPE_LOCAL_REFERENCE:
+
+		opcode = stack_desc->reference.opcode;
+
+		switch (opcode) {
+		case AML_NAME_OP:
+
+			/*
+			 * Convert indirect name ptr to a direct name ptr.
+			 * Then, acpi_ex_resolve_node_to_value can be used to get the value
+			 */
+			temp_node = stack_desc->reference.object;
+
+			/* Delete the Reference Object */
+
+			acpi_ut_remove_reference (stack_desc);
+
+			/* Put direct name pointer onto stack and exit */
+
+			(*stack_ptr) = temp_node;
+			break;
+
+
+		case AML_LOCAL_OP:
+		case AML_ARG_OP:
+
+			/*
+			 * Get the local from the method's state info
+			 * Note: this increments the local's object reference count
+			 */
+			status = acpi_ds_method_data_get_value (opcode,
+					  stack_desc->reference.offset, walk_state, &obj_desc);
+			if (ACPI_FAILURE (status)) {
+				return_ACPI_STATUS (status);
+			}
+
+			ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] value_obj is %p\n",
+				stack_desc->reference.offset, obj_desc));
+
+			/*
+			 * Now we can delete the original Reference Object and
+			 * replace it with the resolved value
+			 */
+			acpi_ut_remove_reference (stack_desc);
+			*stack_ptr = obj_desc;
+			break;
+
+
+		case AML_INDEX_OP:
+
+			switch (stack_desc->reference.target_type) {
+			case ACPI_TYPE_BUFFER_FIELD:
+
+				/* Just return - leave the Reference on the stack */
+				break;
+
+
+			case ACPI_TYPE_PACKAGE:
+
+				obj_desc = *stack_desc->reference.where;
+				if (obj_desc) {
+					/*
+					 * Valid obj descriptor, copy pointer to return value
+					 * (i.e., dereference the package index)
+					 * Delete the ref object, increment the returned object
+					 */
+					acpi_ut_remove_reference (stack_desc);
+					acpi_ut_add_reference (obj_desc);
+					*stack_ptr = obj_desc;
+				}
+				else {
+					/*
+					 * A NULL object descriptor means an unitialized element of
+					 * the package, can't dereference it
+					 */
+					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+						"Attempt to deref an Index to NULL pkg element Idx=%p\n",
+						stack_desc));
+					status = AE_AML_UNINITIALIZED_ELEMENT;
+				}
+				break;
+
+
+			default:
+
+				/* Invalid reference object */
+
+				ACPI_REPORT_ERROR ((
+					"During resolve, Unknown target_type %X in Index/Reference obj %p\n",
+					stack_desc->reference.target_type, stack_desc));
+				status = AE_AML_INTERNAL;
+				break;
+			}
+			break;
+
+
+		case AML_REF_OF_OP:
+		case AML_DEBUG_OP:
+		case AML_LOAD_OP:
+
+			/* Just leave the object as-is */
+
+			break;
+
+
+		default:
+
+			ACPI_REPORT_ERROR (("During resolve, Unknown Reference opcode %X (%s) in %p\n",
+				opcode, acpi_ps_get_opcode_name (opcode), stack_desc));
+			status = AE_AML_INTERNAL;
+			break;
+		}
+		break;
+
+
+	case ACPI_TYPE_BUFFER:
+
+		status = acpi_ds_get_buffer_arguments (stack_desc);
+		break;
+
+
+	case ACPI_TYPE_PACKAGE:
+
+		status = acpi_ds_get_package_arguments (stack_desc);
+		break;
+
+
+	/*
+	 * These cases may never happen here, but just in case..
+	 */
+	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 source_desc=%p Type=%X\n",
+			stack_desc, ACPI_GET_OBJECT_TYPE (stack_desc)));
+
+		status = acpi_ex_read_data_from_field (walk_state, stack_desc, &obj_desc);
+		*stack_ptr = (void *) obj_desc;
+		break;
+
+	default:
+		break;
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_multiple
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *              Operand             - Starting point for resolution
+ *              return_type         - Where the object type is returned
+ *              return_desc         - Where the resolved object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the base object and type.  Traverse a reference list if
+ *              necessary to get to the base object.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_multiple (
+	struct acpi_walk_state          *walk_state,
+	union acpi_operand_object       *operand,
+	acpi_object_type                *return_type,
+	union acpi_operand_object       **return_desc)
+{
+	union acpi_operand_object       *obj_desc = (void *) operand;
+	struct acpi_namespace_node      *node;
+	acpi_object_type                type;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_ex_resolve_multiple");
+
+
+	/*
+	 * Operand can be either a namespace node or an operand descriptor
+	 */
+	switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) {
+	case ACPI_DESC_TYPE_OPERAND:
+		type = obj_desc->common.type;
+		break;
+
+	case ACPI_DESC_TYPE_NAMED:
+		type = ((struct acpi_namespace_node *) obj_desc)->type;
+		obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) obj_desc);
+
+		/* If we had an Alias node, use the attached object for type info */
+
+		if (type == ACPI_TYPE_LOCAL_ALIAS) {
+			type = ((struct acpi_namespace_node *) obj_desc)->type;
+			obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) obj_desc);
+		}
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+	}
+
+
+	/*
+	 * If type is anything other than a reference, we are done
+	 */
+	if (type != ACPI_TYPE_LOCAL_REFERENCE) {
+		goto exit;
+	}
+
+	/*
+	 * For reference objects created via the ref_of or Index operators,
+	 * we need to get to the base object (as per the ACPI specification
+	 * of the object_type and size_of operators). This means traversing
+	 * the list of possibly many nested references.
+	 */
+	while (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
+		switch (obj_desc->reference.opcode) {
+		case AML_REF_OF_OP:
+
+			/* Dereference the reference pointer */
+
+			node = obj_desc->reference.object;
+
+			/* All "References" point to a NS node */
+
+			if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
+				ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n",
+						node, acpi_ut_get_descriptor_name (node)));
+				return_ACPI_STATUS (AE_AML_INTERNAL);
+			}
+
+			/* Get the attached object */
+
+			obj_desc = acpi_ns_get_attached_object (node);
+			if (!obj_desc) {
+				/* No object, use the NS node type */
+
+				type = acpi_ns_get_type (node);
+				goto exit;
+			}
+
+			/* Check for circular references */
+
+			if (obj_desc == operand) {
+				return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
+			}
+			break;
+
+
+		case AML_INDEX_OP:
+
+			/* Get the type of this reference (index into another object) */
+
+			type = obj_desc->reference.target_type;
+			if (type != ACPI_TYPE_PACKAGE) {
+				goto exit;
+			}
+
+			/*
+			 * The main object is a package, we want to get the type
+			 * of the individual package element that is referenced by
+			 * the index.
+			 *
+			 * This could of course in turn be another reference object.
+			 */
+			obj_desc = *(obj_desc->reference.where);
+			if (!obj_desc) {
+				/* NULL package elements are allowed */
+
+				type = 0; /* Uninitialized */
+				goto exit;
+			}
+			break;
+
+
+		case AML_INT_NAMEPATH_OP:
+
+			/* Dereference the reference pointer */
+
+			node = obj_desc->reference.node;
+
+			/* All "References" point to a NS node */
+
+			if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
+				ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n",
+						node, acpi_ut_get_descriptor_name (node)));
+			   return_ACPI_STATUS (AE_AML_INTERNAL);
+			}
+
+			/* Get the attached object */
+
+			obj_desc = acpi_ns_get_attached_object (node);
+			if (!obj_desc) {
+				/* No object, use the NS node type */
+
+				type = acpi_ns_get_type (node);
+				goto exit;
+			}
+
+			/* Check for circular references */
+
+			if (obj_desc == operand) {
+				return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
+			}
+			break;
+
+
+		case AML_LOCAL_OP:
+		case AML_ARG_OP:
+
+			if (return_desc) {
+				status = acpi_ds_method_data_get_value (obj_desc->reference.opcode,
+						  obj_desc->reference.offset, walk_state, &obj_desc);
+				if (ACPI_FAILURE (status)) {
+					return_ACPI_STATUS (status);
+				}
+				acpi_ut_remove_reference (obj_desc);
+			}
+			else {
+				status = acpi_ds_method_data_get_node (obj_desc->reference.opcode,
+						 obj_desc->reference.offset, walk_state, &node);
+				if (ACPI_FAILURE (status)) {
+					return_ACPI_STATUS (status);
+				}
+
+				obj_desc = acpi_ns_get_attached_object (node);
+				if (!obj_desc) {
+					type = ACPI_TYPE_ANY;
+					goto exit;
+				}
+			}
+			break;
+
+
+		case AML_DEBUG_OP:
+
+			/* The Debug Object is of type "debug_object" */
+
+			type = ACPI_TYPE_DEBUG_OBJECT;
+			goto exit;
+
+
+		default:
+
+			ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Unknown Reference subtype %X\n",
+				obj_desc->reference.opcode));
+			return_ACPI_STATUS (AE_AML_INTERNAL);
+		}
+	}
+
+	/*
+	 * Now we are guaranteed to have an object that has not been created
+	 * via the ref_of or Index operators.
+	 */
+	type = ACPI_GET_OBJECT_TYPE (obj_desc);
+
+
+exit:
+	/* Convert internal types to external types */
+
+	switch (type) {
+	case ACPI_TYPE_LOCAL_REGION_FIELD:
+	case ACPI_TYPE_LOCAL_BANK_FIELD:
+	case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+		type = ACPI_TYPE_FIELD_UNIT;
+		break;
+
+	case ACPI_TYPE_LOCAL_SCOPE:
+
+		/* Per ACPI Specification, Scope is untyped */
+
+		type = ACPI_TYPE_ANY;
+		break;
+
+	default:
+		/* No change to Type required */
+		break;
+	}
+
+	*return_type = type;
+	if (return_desc) {
+		*return_desc = obj_desc;
+	}
+	return_ACPI_STATUS (AE_OK);
+}
+
+