drivers/acpi/acpica/dswload.c - linux - Git at Google

 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
 /******************************************************************************
  *
  * Module Name: dswload - Dispatcher first pass namespace load callbacks
  *
  * Copyright (C) 2000 - 2019, Intel Corp.
  *
  *****************************************************************************/

 #include <acpi/acpi.h>
 #include "accommon.h"
 #include "acparser.h"
 #include "amlcode.h"
 #include "acdispat.h"
 #include "acinterp.h"
 #include "acnamesp.h"

 #ifdef ACPI_ASL_COMPILER
 #include "acdisasm.h"
 #endif

 #define _COMPONENT          ACPI_DISPATCHER
 ACPI_MODULE_NAME("dswload")

 /*******************************************************************************
  *
  * FUNCTION:    acpi_ds_init_callbacks
  *
  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  *              pass_number     - 1, 2, or 3
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Init walk state callbacks
  *
  ******************************************************************************/
 acpi_status
 acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
 {

 	switch (pass_number) {
 	case 0:

 		/* Parse only - caller will setup callbacks */

 		walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
 		    ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE;
 		walk_state->descending_callback = NULL;
 		walk_state->ascending_callback = NULL;
 		break;

 	case 1:

 		/* Load pass 1 */

 		walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
 		    ACPI_PARSE_DELETE_TREE;
 		walk_state->descending_callback = acpi_ds_load1_begin_op;
 		walk_state->ascending_callback = acpi_ds_load1_end_op;
 		break;

 	case 2:

 		/* Load pass 2 */

 		walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
 		    ACPI_PARSE_DELETE_TREE;
 		walk_state->descending_callback = acpi_ds_load2_begin_op;
 		walk_state->ascending_callback = acpi_ds_load2_end_op;
 		break;

 	case 3:

 		/* Execution pass */

 		walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
 		    ACPI_PARSE_DELETE_TREE;
 		walk_state->descending_callback = acpi_ds_exec_begin_op;
 		walk_state->ascending_callback = acpi_ds_exec_end_op;
 		break;

 	default:

 		return (AE_BAD_PARAMETER);
 	}

 	return (AE_OK);
 }

 /*******************************************************************************
  *
  * FUNCTION:    acpi_ds_load1_begin_op
  *
  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  *              out_op          - Where to return op if a new one is created
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
  *
  ******************************************************************************/

 acpi_status
 acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
 		       union acpi_parse_object **out_op)
 {
 	union acpi_parse_object *op;
 	struct acpi_namespace_node *node;
 	acpi_status status;
 	acpi_object_type object_type;
 	char *path;
 	u32 flags;

 	ACPI_FUNCTION_TRACE_PTR(ds_load1_begin_op, walk_state->op);

 	op = walk_state->op;
 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 			  walk_state));

 	/* We are only interested in opcodes that have an associated name */

 	if (op) {
 		if (!(walk_state->op_info->flags & AML_NAMED)) {
 			*out_op = op;
 			return_ACPI_STATUS(AE_OK);
 		}

 		/* Check if this object has already been installed in the namespace */

 		if (op->common.node) {
 			*out_op = op;
 			return_ACPI_STATUS(AE_OK);
 		}
 	}

 	path = acpi_ps_get_next_namestring(&walk_state->parser_state);

 	/* Map the raw opcode into an internal object type */

 	object_type = walk_state->op_info->object_type;

 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 			  "State=%p Op=%p [%s]\n", walk_state, op,
 			  acpi_ut_get_type_name(object_type)));

 	switch (walk_state->opcode) {
 	case AML_SCOPE_OP:
 		/*
 		 * The target name of the Scope() operator must exist at this point so
 		 * that we can actually open the scope to enter new names underneath it.
 		 * Allow search-to-root for single namesegs.
 		 */
 		status =
 		    acpi_ns_lookup(walk_state->scope_info, path, object_type,
 				   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 				   walk_state, &(node));
 #ifdef ACPI_ASL_COMPILER
 		if (status == AE_NOT_FOUND) {
 			/*
 			 * Table disassembly:
 			 * Target of Scope() not found. Generate an External for it, and
 			 * insert the name into the namespace.
 			 */
 			acpi_dm_add_op_to_external_list(op, path,
 							ACPI_TYPE_DEVICE, 0, 0);
 			status =
 			    acpi_ns_lookup(walk_state->scope_info, path,
 					   object_type, ACPI_IMODE_LOAD_PASS1,
 					   ACPI_NS_SEARCH_PARENT, walk_state,
 					   &node);
 		}
 #endif
 		if (ACPI_FAILURE(status)) {
 			ACPI_ERROR_NAMESPACE(walk_state->scope_info, path,
 					     status);
 			return_ACPI_STATUS(status);
 		}

 		/*
 		 * Check to make sure that the target is
 		 * one of the opcodes that actually opens a scope
 		 */
 		switch (node->type) {
 		case ACPI_TYPE_ANY:
 		case ACPI_TYPE_LOCAL_SCOPE:	/* Scope  */
 		case ACPI_TYPE_DEVICE:
 		case ACPI_TYPE_POWER:
 		case ACPI_TYPE_PROCESSOR:
 		case ACPI_TYPE_THERMAL:

 			/* These are acceptable types */
 			break;

 		case ACPI_TYPE_INTEGER:
 		case ACPI_TYPE_STRING:
 		case ACPI_TYPE_BUFFER:
 			/*
 			 * These types we will allow, but we will change the type.
 			 * This enables some existing code of the form:
 			 *
 			 *  Name (DEB, 0)
 			 *  Scope (DEB) { ... }
 			 *
 			 * Note: silently change the type here. On the second pass,
 			 * we will report a warning
 			 */
 			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 					  "Type override - [%4.4s] had invalid type (%s) "
 					  "for Scope operator, changed to type ANY\n",
 					  acpi_ut_get_node_name(node),
 					  acpi_ut_get_type_name(node->type)));

 			node->type = ACPI_TYPE_ANY;
 			walk_state->scope_info->common.value = ACPI_TYPE_ANY;
 			break;

 		case ACPI_TYPE_METHOD:
 			/*
 			 * Allow scope change to root during execution of module-level
 			 * code. Root is typed METHOD during this time.
 			 */
 			if ((node == acpi_gbl_root_node) &&
 			    (walk_state->
 			     parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
 				break;
 			}

 			/*lint -fallthrough */

 		default:

 			/* All other types are an error */

 			ACPI_ERROR((AE_INFO,
 				    "Invalid type (%s) for target of "
 				    "Scope operator [%4.4s] (Cannot override)",
 				    acpi_ut_get_type_name(node->type),
 				    acpi_ut_get_node_name(node)));

 			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 		}
 		break;

 	default:
 		/*
 		 * For all other named opcodes, we will enter the name into
 		 * the namespace.
 		 *
 		 * Setup the search flags.
 		 * Since we are entering a name into the namespace, we do not want to
 		 * enable the search-to-root upsearch.
 		 *
 		 * There are only two conditions where it is acceptable that the name
 		 * already exists:
 		 *    1) the Scope() operator can reopen a scoping object that was
 		 *       previously defined (Scope, Method, Device, etc.)
 		 *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
 		 *       buffer_field, or Package), the name of the object is already
 		 *       in the namespace.
 		 */
 		if (walk_state->deferred_node) {

 			/* This name is already in the namespace, get the node */

 			node = walk_state->deferred_node;
 			status = AE_OK;
 			break;
 		}

 		/*
 		 * If we are executing a method, do not create any namespace objects
 		 * during the load phase, only during execution.
 		 */
 		if (walk_state->method_node) {
 			node = NULL;
 			status = AE_OK;
 			break;
 		}

 		flags = ACPI_NS_NO_UPSEARCH;
 		if ((walk_state->opcode != AML_SCOPE_OP) &&
 		    (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
 			if (walk_state->namespace_override) {
 				flags |= ACPI_NS_OVERRIDE_IF_FOUND;
 				ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 						  "[%s] Override allowed\n",
 						  acpi_ut_get_type_name
 						  (object_type)));
 			} else {
 				flags |= ACPI_NS_ERROR_IF_FOUND;
 				ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 						  "[%s] Cannot already exist\n",
 						  acpi_ut_get_type_name
 						  (object_type)));
 			}
 		} else {
 			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 					  "[%s] Both Find or Create allowed\n",
 					  acpi_ut_get_type_name(object_type)));
 		}

 		/*
 		 * Enter the named type into the internal namespace. We enter the name
 		 * as we go downward in the parse tree. Any necessary subobjects that
 		 * involve arguments to the opcode must be created as we go back up the
 		 * parse tree later.
 		 */
 		status =
 		    acpi_ns_lookup(walk_state->scope_info, path, object_type,
 				   ACPI_IMODE_LOAD_PASS1, flags, walk_state,
 				   &node);
 		if (ACPI_FAILURE(status)) {
 			if (status == AE_ALREADY_EXISTS) {

 				/* The name already exists in this scope */

 				if (node->flags & ANOBJ_IS_EXTERNAL) {
 					/*
 					 * Allow one create on an object or segment that was
 					 * previously declared External
 					 */
 					node->flags &= ~ANOBJ_IS_EXTERNAL;
 					node->type = (u8) object_type;

 					/* Just retyped a node, probably will need to open a scope */

 					if (acpi_ns_opens_scope(object_type)) {
 						status =
 						    acpi_ds_scope_stack_push
 						    (node, object_type,
 						     walk_state);
 						if (ACPI_FAILURE(status)) {
 							return_ACPI_STATUS
 							    (status);
 						}
 					}

 					status = AE_OK;
 				}
 			}

 			if (ACPI_FAILURE(status)) {
 				ACPI_ERROR_NAMESPACE(walk_state->scope_info,
 						     path, status);
 				return_ACPI_STATUS(status);
 			}
 		}
 		break;
 	}

 	/* Common exit */

 	if (!op) {

 		/* Create a new op */

 		op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
 		if (!op) {
 			return_ACPI_STATUS(AE_NO_MEMORY);
 		}
 	}

 	/* Initialize the op */

 #ifdef ACPI_CONSTANT_EVAL_ONLY
 	op->named.path = path;
 #endif

 	if (node) {
 		/*
 		 * Put the Node in the "op" object that the parser uses, so we
 		 * can get it again quickly when this scope is closed
 		 */
 		op->common.node = node;
 		op->named.name = node->name.integer;
 	}

 	acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
 			   op);
 	*out_op = op;
 	return_ACPI_STATUS(status);
 }

 /*******************************************************************************
  *
  * FUNCTION:    acpi_ds_load1_end_op
  *
  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Ascending callback used during the loading of the namespace,
  *              both control methods and everything else.
  *
  ******************************************************************************/

 acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
 {
 	union acpi_parse_object *op;
 	acpi_object_type object_type;
 	acpi_status status = AE_OK;

 #ifdef ACPI_ASL_COMPILER
 	u8 param_count;
 #endif

 	ACPI_FUNCTION_TRACE(ds_load1_end_op);

 	op = walk_state->op;
 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
 			  walk_state));

 	/* We are only interested in opcodes that have an associated name */

 	if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
 		return_ACPI_STATUS(AE_OK);
 	}

 	/* Get the object type to determine if we should pop the scope */

 	object_type = walk_state->op_info->object_type;

 	if (walk_state->op_info->flags & AML_FIELD) {
 		/*
 		 * If we are executing a method, do not create any namespace objects
 		 * during the load phase, only during execution.
 		 */
 		if (!walk_state->method_node) {
 			if (walk_state->opcode == AML_FIELD_OP ||
 			    walk_state->opcode == AML_BANK_FIELD_OP ||
 			    walk_state->opcode == AML_INDEX_FIELD_OP) {
 				status =
 				    acpi_ds_init_field_objects(op, walk_state);
 			}
 		}
 		return_ACPI_STATUS(status);
 	}

 	/*
 	 * If we are executing a method, do not create any namespace objects
 	 * during the load phase, only during execution.
 	 */
 	if (!walk_state->method_node) {
 		if (op->common.aml_opcode == AML_REGION_OP) {
 			status =
 			    acpi_ex_create_region(op->named.data,
 						  op->named.length,
 						  (acpi_adr_space_type)
 						  ((op->common.value.arg)->
 						   common.value.integer),
 						  walk_state);
 			if (ACPI_FAILURE(status)) {
 				return_ACPI_STATUS(status);
 			}
 		} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
 			status =
 			    acpi_ex_create_region(op->named.data,
 						  op->named.length,
 						  ACPI_ADR_SPACE_DATA_TABLE,
 						  walk_state);
 			if (ACPI_FAILURE(status)) {
 				return_ACPI_STATUS(status);
 			}
 		}
 	}

 	if (op->common.aml_opcode == AML_NAME_OP) {

 		/* For Name opcode, get the object type from the argument */

 		if (op->common.value.arg) {
 			object_type = (acpi_ps_get_opcode_info((op->common.
 								value.arg)->
 							       common.
 							       aml_opcode))->
 			    object_type;

 			/* Set node type if we have a namespace node */

 			if (op->common.node) {
 				op->common.node->type = (u8) object_type;
 			}
 		}
 	}
 #ifdef ACPI_ASL_COMPILER
 	/*
 	 * For external opcode, get the object type from the argument and
 	 * get the parameter count from the argument's next.
 	 */
 	if (acpi_gbl_disasm_flag &&
 	    op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) {
 		/*
 		 * Note, if this external is not a method
 		 * Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
 		 * Therefore, param_count will be 0.
 		 */
 		param_count =
 		    (u8)op->common.value.arg->common.next->common.value.integer;
 		object_type = (u8)op->common.value.arg->common.value.integer;
 		op->common.node->flags |= ANOBJ_IS_EXTERNAL;
 		op->common.node->type = (u8)object_type;

 		acpi_dm_create_subobject_for_external((u8)object_type,
 						      &op->common.node,
 						      param_count);

 		/*
 		 * Add the external to the external list because we may be
 		 * emitting code based off of the items within the external list.
 		 */
 		acpi_dm_add_op_to_external_list(op, op->named.path,
 						(u8)object_type, param_count,
 						ACPI_EXT_ORIGIN_FROM_OPCODE |
 						ACPI_EXT_RESOLVED_REFERENCE);
 	}
 #endif

 	/*
 	 * If we are executing a method, do not create any namespace objects
 	 * during the load phase, only during execution.
 	 */
 	if (!walk_state->method_node) {
 		if (op->common.aml_opcode == AML_METHOD_OP) {
 			/*
 			 * method_op pkg_length name_string method_flags term_list
 			 *
 			 * Note: We must create the method node/object pair as soon as we
 			 * see the method declaration. This allows later pass1 parsing
 			 * of invocations of the method (need to know the number of
 			 * arguments.)
 			 */
 			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 					  "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
 					  walk_state, op, op->named.node));

 			if (!acpi_ns_get_attached_object(op->named.node)) {
 				walk_state->operands[0] =
 				    ACPI_CAST_PTR(void, op->named.node);
 				walk_state->num_operands = 1;

 				status =
 				    acpi_ds_create_operands(walk_state,
 							    op->common.value.
 							    arg);
 				if (ACPI_SUCCESS(status)) {
 					status =
 					    acpi_ex_create_method(op->named.
 								  data,
 								  op->named.
 								  length,
 								  walk_state);
 				}

 				walk_state->operands[0] = NULL;
 				walk_state->num_operands = 0;

 				if (ACPI_FAILURE(status)) {
 					return_ACPI_STATUS(status);
 				}
 			}
 		}
 	}

 	/* Pop the scope stack (only if loading a table) */

 	if (!walk_state->method_node &&
 	    op->common.aml_opcode != AML_EXTERNAL_OP &&
 	    acpi_ns_opens_scope(object_type)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 				  "(%s): Popping scope for Op %p\n",
 				  acpi_ut_get_type_name(object_type), op));

 		status = acpi_ds_scope_stack_pop(walk_state);
 	}

 	return_ACPI_STATUS(status);
 }
	// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
	/******************************************************************************
	*
	* Module Name: dswload - Dispatcher first pass namespace load callbacks
	*
	* Copyright (C) 2000 - 2019, Intel Corp.
	*
	*****************************************************************************/

	#include <acpi/acpi.h>
	#include "accommon.h"
	#include "acparser.h"
	#include "amlcode.h"
	#include "acdispat.h"
	#include "acinterp.h"
	#include "acnamesp.h"

	#ifdef ACPI_ASL_COMPILER
	#include "acdisasm.h"
	#endif

	#define _COMPONENT ACPI_DISPATCHER
	ACPI_MODULE_NAME("dswload")

	/*******************************************************************************
	*
	* FUNCTION: acpi_ds_init_callbacks
	*
	* PARAMETERS: walk_state - Current state of the parse tree walk
	* pass_number - 1, 2, or 3
	*
	* RETURN: Status
	*
	* DESCRIPTION: Init walk state callbacks
	*
	******************************************************************************/
	acpi_status
	acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
	{

	switch (pass_number) {
	case 0:

	/* Parse only - caller will setup callbacks */

	walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 \|
	ACPI_PARSE_DELETE_TREE \| ACPI_PARSE_DISASSEMBLE;
	walk_state->descending_callback = NULL;
	walk_state->ascending_callback = NULL;
	break;

	case 1:

	/* Load pass 1 */

	walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 \|
	ACPI_PARSE_DELETE_TREE;
	walk_state->descending_callback = acpi_ds_load1_begin_op;
	walk_state->ascending_callback = acpi_ds_load1_end_op;
	break;

	case 2:

	/* Load pass 2 */

	walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 \|
	ACPI_PARSE_DELETE_TREE;
	walk_state->descending_callback = acpi_ds_load2_begin_op;
	walk_state->ascending_callback = acpi_ds_load2_end_op;
	break;

	case 3:

	/* Execution pass */

	walk_state->parse_flags \|= ACPI_PARSE_EXECUTE \|
	ACPI_PARSE_DELETE_TREE;
	walk_state->descending_callback = acpi_ds_exec_begin_op;
	walk_state->ascending_callback = acpi_ds_exec_end_op;
	break;

	default:

	return (AE_BAD_PARAMETER);
	}

	return (AE_OK);
	}

	/*******************************************************************************
	*
	* FUNCTION: acpi_ds_load1_begin_op
	*
	* PARAMETERS: walk_state - Current state of the parse tree walk
	* out_op - Where to return op if a new one is created
	*
	* RETURN: Status
	*
	* DESCRIPTION: Descending callback used during the loading of ACPI tables.
	*
	******************************************************************************/

	acpi_status
	acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
	union acpi_parse_object **out_op)
	{
	union acpi_parse_object *op;
	struct acpi_namespace_node *node;
	acpi_status status;
	acpi_object_type object_type;
	char *path;
	u32 flags;

	ACPI_FUNCTION_TRACE_PTR(ds_load1_begin_op, walk_state->op);

	op = walk_state->op;
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
	walk_state));

	/* We are only interested in opcodes that have an associated name */

	if (op) {
	if (!(walk_state->op_info->flags & AML_NAMED)) {
	*out_op = op;
	return_ACPI_STATUS(AE_OK);
	}

	/* Check if this object has already been installed in the namespace */

	if (op->common.node) {
	*out_op = op;
	return_ACPI_STATUS(AE_OK);
	}
	}

	path = acpi_ps_get_next_namestring(&walk_state->parser_state);

	/* Map the raw opcode into an internal object type */

	object_type = walk_state->op_info->object_type;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	"State=%p Op=%p [%s]\n", walk_state, op,
	acpi_ut_get_type_name(object_type)));

	switch (walk_state->opcode) {
	case AML_SCOPE_OP:
	/*
	* The target name of the Scope() operator must exist at this point so
	* that we can actually open the scope to enter new names underneath it.
	* Allow search-to-root for single namesegs.
	*/
	status =
	acpi_ns_lookup(walk_state->scope_info, path, object_type,
	ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
	walk_state, &(node));
	#ifdef ACPI_ASL_COMPILER
	if (status == AE_NOT_FOUND) {
	/*
	* Table disassembly:
	* Target of Scope() not found. Generate an External for it, and
	* insert the name into the namespace.
	*/
	acpi_dm_add_op_to_external_list(op, path,
	ACPI_TYPE_DEVICE, 0, 0);
	status =
	acpi_ns_lookup(walk_state->scope_info, path,
	object_type, ACPI_IMODE_LOAD_PASS1,
	ACPI_NS_SEARCH_PARENT, walk_state,
	&node);
	}
	#endif
	if (ACPI_FAILURE(status)) {
	ACPI_ERROR_NAMESPACE(walk_state->scope_info, path,
	status);
	return_ACPI_STATUS(status);
	}

	/*
	* Check to make sure that the target is
	* one of the opcodes that actually opens a scope
	*/
	switch (node->type) {
	case ACPI_TYPE_ANY:
	case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
	case ACPI_TYPE_DEVICE:
	case ACPI_TYPE_POWER:
	case ACPI_TYPE_PROCESSOR:
	case ACPI_TYPE_THERMAL:

	/* These are acceptable types */
	break;

	case ACPI_TYPE_INTEGER:
	case ACPI_TYPE_STRING:
	case ACPI_TYPE_BUFFER:
	/*
	* These types we will allow, but we will change the type.
	* This enables some existing code of the form:
	*
	* Name (DEB, 0)
	* Scope (DEB) { ... }
	*
	* Note: silently change the type here. On the second pass,
	* we will report a warning
	*/
	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	"Type override - [%4.4s] had invalid type (%s) "
	"for Scope operator, changed to type ANY\n",
	acpi_ut_get_node_name(node),
	acpi_ut_get_type_name(node->type)));

	node->type = ACPI_TYPE_ANY;
	walk_state->scope_info->common.value = ACPI_TYPE_ANY;
	break;

	case ACPI_TYPE_METHOD:
	/*
	* Allow scope change to root during execution of module-level
	* code. Root is typed METHOD during this time.
	*/
	if ((node == acpi_gbl_root_node) &&
	(walk_state->
	parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
	break;
	}

	/lint -fallthrough /

	default:

	/* All other types are an error */

	ACPI_ERROR((AE_INFO,
	"Invalid type (%s) for target of "
	"Scope operator [%4.4s] (Cannot override)",
	acpi_ut_get_type_name(node->type),
	acpi_ut_get_node_name(node)));

	return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
	}
	break;

	default:
	/*
	* For all other named opcodes, we will enter the name into
	* the namespace.
	*
	* Setup the search flags.
	* Since we are entering a name into the namespace, we do not want to
	* enable the search-to-root upsearch.
	*
	* There are only two conditions where it is acceptable that the name
	* already exists:
	* 1) the Scope() operator can reopen a scoping object that was
	* previously defined (Scope, Method, Device, etc.)
	* 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
	* buffer_field, or Package), the name of the object is already
	* in the namespace.
	*/
	if (walk_state->deferred_node) {

	/* This name is already in the namespace, get the node */

	node = walk_state->deferred_node;
	status = AE_OK;
	break;
	}

	/*
	* If we are executing a method, do not create any namespace objects
	* during the load phase, only during execution.
	*/
	if (walk_state->method_node) {
	node = NULL;
	status = AE_OK;
	break;
	}

	flags = ACPI_NS_NO_UPSEARCH;
	if ((walk_state->opcode != AML_SCOPE_OP) &&
	(!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
	if (walk_state->namespace_override) {
	flags \|= ACPI_NS_OVERRIDE_IF_FOUND;
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	"[%s] Override allowed\n",
	acpi_ut_get_type_name
	(object_type)));
	} else {
	flags \|= ACPI_NS_ERROR_IF_FOUND;
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	"[%s] Cannot already exist\n",
	acpi_ut_get_type_name
	(object_type)));
	}
	} else {
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	"[%s] Both Find or Create allowed\n",
	acpi_ut_get_type_name(object_type)));
	}

	/*
	* Enter the named type into the internal namespace. We enter the name
	* as we go downward in the parse tree. Any necessary subobjects that
	* involve arguments to the opcode must be created as we go back up the
	* parse tree later.
	*/
	status =
	acpi_ns_lookup(walk_state->scope_info, path, object_type,
	ACPI_IMODE_LOAD_PASS1, flags, walk_state,
	&node);
	if (ACPI_FAILURE(status)) {
	if (status == AE_ALREADY_EXISTS) {

	/* The name already exists in this scope */

	if (node->flags & ANOBJ_IS_EXTERNAL) {
	/*
	* Allow one create on an object or segment that was
	* previously declared External
	*/
	node->flags &= ~ANOBJ_IS_EXTERNAL;
	node->type = (u8) object_type;

	/* Just retyped a node, probably will need to open a scope */

	if (acpi_ns_opens_scope(object_type)) {
	status =
	acpi_ds_scope_stack_push
	(node, object_type,
	walk_state);
	if (ACPI_FAILURE(status)) {
	return_ACPI_STATUS
	(status);
	}
	}

	status = AE_OK;
	}
	}

	if (ACPI_FAILURE(status)) {
	ACPI_ERROR_NAMESPACE(walk_state->scope_info,
	path, status);
	return_ACPI_STATUS(status);
	}
	}
	break;
	}

	/* Common exit */

	if (!op) {

	/* Create a new op */

	op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
	if (!op) {
	return_ACPI_STATUS(AE_NO_MEMORY);
	}
	}

	/* Initialize the op */

	#ifdef ACPI_CONSTANT_EVAL_ONLY
	op->named.path = path;
	#endif

	if (node) {
	/*
	* Put the Node in the "op" object that the parser uses, so we
	* can get it again quickly when this scope is closed
	*/
	op->common.node = node;
	op->named.name = node->name.integer;
	}

	acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
	op);
	*out_op = op;
	return_ACPI_STATUS(status);
	}

	/*******************************************************************************
	*
	* FUNCTION: acpi_ds_load1_end_op
	*
	* PARAMETERS: walk_state - Current state of the parse tree walk
	*
	* RETURN: Status
	*
	* DESCRIPTION: Ascending callback used during the loading of the namespace,
	* both control methods and everything else.
	*
	******************************************************************************/

	acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
	{
	union acpi_parse_object *op;
	acpi_object_type object_type;
	acpi_status status = AE_OK;

	#ifdef ACPI_ASL_COMPILER
	u8 param_count;
	#endif

	ACPI_FUNCTION_TRACE(ds_load1_end_op);

	op = walk_state->op;
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
	walk_state));

	/* We are only interested in opcodes that have an associated name */

	if (!(walk_state->op_info->flags & (AML_NAMED \| AML_FIELD))) {
	return_ACPI_STATUS(AE_OK);
	}

	/* Get the object type to determine if we should pop the scope */

	object_type = walk_state->op_info->object_type;

	if (walk_state->op_info->flags & AML_FIELD) {
	/*
	* If we are executing a method, do not create any namespace objects
	* during the load phase, only during execution.
	*/
	if (!walk_state->method_node) {
	if (walk_state->opcode == AML_FIELD_OP \|\|
	walk_state->opcode == AML_BANK_FIELD_OP \|\|
	walk_state->opcode == AML_INDEX_FIELD_OP) {
	status =
	acpi_ds_init_field_objects(op, walk_state);
	}
	}
	return_ACPI_STATUS(status);
	}

	/*
	* If we are executing a method, do not create any namespace objects
	* during the load phase, only during execution.
	*/
	if (!walk_state->method_node) {
	if (op->common.aml_opcode == AML_REGION_OP) {
	status =
	acpi_ex_create_region(op->named.data,
	op->named.length,
	(acpi_adr_space_type)
	((op->common.value.arg)->
	common.value.integer),
	walk_state);
	if (ACPI_FAILURE(status)) {
	return_ACPI_STATUS(status);
	}
	} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
	status =
	acpi_ex_create_region(op->named.data,
	op->named.length,
	ACPI_ADR_SPACE_DATA_TABLE,
	walk_state);
	if (ACPI_FAILURE(status)) {
	return_ACPI_STATUS(status);
	}
	}
	}

	if (op->common.aml_opcode == AML_NAME_OP) {

	/* For Name opcode, get the object type from the argument */

	if (op->common.value.arg) {
	object_type = (acpi_ps_get_opcode_info((op->common.
	value.arg)->
	common.
	aml_opcode))->
	object_type;

	/* Set node type if we have a namespace node */

	if (op->common.node) {
	op->common.node->type = (u8) object_type;
	}
	}
	}
	#ifdef ACPI_ASL_COMPILER
	/*
	* For external opcode, get the object type from the argument and
	* get the parameter count from the argument's next.
	*/
	if (acpi_gbl_disasm_flag &&
	op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) {
	/*
	* Note, if this external is not a method
	* Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
	* Therefore, param_count will be 0.
	*/
	param_count =
	(u8)op->common.value.arg->common.next->common.value.integer;
	object_type = (u8)op->common.value.arg->common.value.integer;
	op->common.node->flags \|= ANOBJ_IS_EXTERNAL;
	op->common.node->type = (u8)object_type;

	acpi_dm_create_subobject_for_external((u8)object_type,
	&op->common.node,
	param_count);

	/*
	* Add the external to the external list because we may be
	* emitting code based off of the items within the external list.
	*/
	acpi_dm_add_op_to_external_list(op, op->named.path,
	(u8)object_type, param_count,
	ACPI_EXT_ORIGIN_FROM_OPCODE \|
	ACPI_EXT_RESOLVED_REFERENCE);
	}
	#endif

	/*
	* If we are executing a method, do not create any namespace objects
	* during the load phase, only during execution.
	*/
	if (!walk_state->method_node) {
	if (op->common.aml_opcode == AML_METHOD_OP) {
	/*
	* method_op pkg_length name_string method_flags term_list
	*
	* Note: We must create the method node/object pair as soon as we
	* see the method declaration. This allows later pass1 parsing
	* of invocations of the method (need to know the number of
	* arguments.)
	*/
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	"LOADING-Method: State=%p Op=%p NamedObj=%p\n",
	walk_state, op, op->named.node));

	if (!acpi_ns_get_attached_object(op->named.node)) {
	walk_state->operands[0] =
	ACPI_CAST_PTR(void, op->named.node);
	walk_state->num_operands = 1;

	status =
	acpi_ds_create_operands(walk_state,
	op->common.value.
	arg);
	if (ACPI_SUCCESS(status)) {
	status =
	acpi_ex_create_method(op->named.
	data,
	op->named.
	length,
	walk_state);
	}

	walk_state->operands[0] = NULL;
	walk_state->num_operands = 0;

	if (ACPI_FAILURE(status)) {
	return_ACPI_STATUS(status);
	}
	}
	}
	}

	/* Pop the scope stack (only if loading a table) */

	if (!walk_state->method_node &&
	op->common.aml_opcode != AML_EXTERNAL_OP &&
	acpi_ns_opens_scope(object_type)) {
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	"(%s): Popping scope for Op %p\n",
	acpi_ut_get_type_name(object_type), op));

	status = acpi_ds_scope_stack_pop(walk_state);
	}

	return_ACPI_STATUS(status);
	}