text: /******************************************************************************
   *
   * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
   *
   *****************************************************************************/
  
  /*
   * Copyright (C) 2000 - 2017, 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 "accommon.h"
  #include "acparser.h"
  #include "amlcode.h"
  #include "acdispat.h"
  #include "acinterp.h"
  #include "acnamesp.h"
  #include "acevents.h"
  
  #define _COMPONENT          ACPI_DISPATCHER
  ACPI_MODULE_NAME("dswload2")
  
  /*******************************************************************************
   *
   * FUNCTION:    acpi_ds_load2_begin_op
   *
   * PARAMETERS:  walk_state      - Current state of the parse tree walk
   *              out_op          - Wher 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_load2_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 *buffer_ptr;
  	u32 flags;
  
  	ACPI_FUNCTION_TRACE(ds_load2_begin_op);
  
  	op = walk_state->op;
  	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
  			  walk_state));
  
  	if (op) {
  		if ((walk_state->control_state) &&
  		    (walk_state->control_state->common.state ==
  		     ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
  
  			/* We are executing a while loop outside of a method */
  
  			status = acpi_ds_exec_begin_op(walk_state, out_op);
  			return_ACPI_STATUS(status);
  		}
  
  		/* We only care about Namespace opcodes here */
  
  		if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
  		     (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
  		    (!(walk_state->op_info->flags & AML_NAMED))) {
  			return_ACPI_STATUS(AE_OK);
  		}
  
  		/* Get the name we are going to enter or lookup in the namespace */
  
  		if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
  
  			/* For Namepath op, get the path string */
  
  			buffer_ptr = op->common.value.string;
  			if (!buffer_ptr) {
  
  				/* No name, just exit */
  
  				return_ACPI_STATUS(AE_OK);
  			}
  		} else {
  			/* Get name from the op */
  
  			buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
  		}
  	} else {
  		/* Get the namestring from the raw AML */
  
  		buffer_ptr =
  		    acpi_ps_get_next_namestring(&walk_state->parser_state);
  	}
  
  	/* Map the opcode into an internal object type */
  
  	object_type = walk_state->op_info->object_type;
  
  	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
  			  "State=%p Op=%p Type=%X\n", walk_state, op,
  			  object_type));
  
  	switch (walk_state->opcode) {
  	case AML_FIELD_OP:
  	case AML_BANK_FIELD_OP:
  	case AML_INDEX_FIELD_OP:
  
  		node = NULL;
  		status = AE_OK;
  		break;
  
  	case AML_INT_NAMEPATH_OP:
  		/*
  		 * The name_path is an object reference to an existing object.
  		 * Don't enter the name into the namespace, but look it up
  		 * for use later.
  		 */
  		status =
  		    acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
  				   object_type, ACPI_IMODE_EXECUTE,
  				   ACPI_NS_SEARCH_PARENT, walk_state, &(node));
  		break;
  
  	case AML_SCOPE_OP:
  
  		/* Special case for Scope(\) -> refers to the Root node */
  
  		if (op && (op->named.node == acpi_gbl_root_node)) {
  			node = op->named.node;
  
  			status =
  			    acpi_ds_scope_stack_push(node, object_type,
  						     walk_state);
  			if (ACPI_FAILURE(status)) {
  				return_ACPI_STATUS(status);
  			}
  		} else {
  			/*
  			 * The Path is an object reference to an existing object.
  			 * Don't enter the name into the namespace, but look it up
  			 * for use later.
  			 */
  			status =
  			    acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
  					   object_type, ACPI_IMODE_EXECUTE,
  					   ACPI_NS_SEARCH_PARENT, walk_state,
  					   &(node));
  			if (ACPI_FAILURE(status)) {
  #ifdef ACPI_ASL_COMPILER
  				if (status == AE_NOT_FOUND) {
  					status = AE_OK;
  				} else {
  					ACPI_ERROR_NAMESPACE(buffer_ptr,
  							     status);
  				}
  #else
  				ACPI_ERROR_NAMESPACE(buffer_ptr, status);
  #endif
  				return_ACPI_STATUS(status);
  			}
  		}
  
  		/*
  		 * We must 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) { ... }
  			 */
  			ACPI_WARNING((AE_INFO,
  				      "Type override - [%4.4s] had invalid type (%s) "
  				      "for Scope operator, changed to type ANY",
  				      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:
  
  		/* All other opcodes */
  
  		if (op && op->common.node) {
  
  			/* This op/node was previously entered into the namespace */
  
  			node = op->common.node;
  
  			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);
  				}
  			}
  
  			return_ACPI_STATUS(AE_OK);
  		}
  
  		/*
  		 * 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.
  		 *
  		 * Note: Name may already exist if we are executing a deferred opcode.
  		 */
  		if (walk_state->deferred_node) {
  
  			/* This name is already in the namespace, get the node */
  
  			node = walk_state->deferred_node;
  			status = AE_OK;
  			break;
  		}
  
  		flags = ACPI_NS_NO_UPSEARCH;
  		if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
  
  			/* Execution mode, node cannot already exist, node is temporary */
  
  			flags |= ACPI_NS_ERROR_IF_FOUND;
  
  			if (!
  			    (walk_state->
  			     parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
  				flags |= ACPI_NS_TEMPORARY;
  			}
  		}
  
  		/* Add new entry or lookup existing entry */
  
  		status =
  		    acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
  				   object_type, ACPI_IMODE_LOAD_PASS2, flags,
  				   walk_state, &node);
  
  		if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
  			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
  					  "***New Node [%4.4s] %p is temporary\n",
  					  acpi_ut_get_node_name(node), node));
  		}
  		break;
  	}
  
  	if (ACPI_FAILURE(status)) {
  		ACPI_ERROR_NAMESPACE(buffer_ptr, status);
  		return_ACPI_STATUS(status);
  	}
  
  	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 new op */
  
  		if (node) {
  			op->named.name = node->name.integer;
  		}
  		*out_op = op;
  	}
  
  	/*
  	 * 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;
  	return_ACPI_STATUS(status);
  }
  
  /*******************************************************************************
   *
   * FUNCTION:    acpi_ds_load2_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_load2_end_op(struct acpi_walk_state *walk_state)
  {
  	union acpi_parse_object *op;
  	acpi_status status = AE_OK;
  	acpi_object_type object_type;
  	struct acpi_namespace_node *node;
  	union acpi_parse_object *arg;
  	struct acpi_namespace_node *new_node;
  #ifndef ACPI_NO_METHOD_EXECUTION
  	u32 i;
  	u8 region_space;
  #endif
  
  	ACPI_FUNCTION_TRACE(ds_load2_end_op);
  
  	op = walk_state->op;
  	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
  			  walk_state->op_info->name, op, walk_state));
  
  	/* Check if opcode had an associated namespace object */
  
  	if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
  		return_ACPI_STATUS(AE_OK);
  	}
  
  	if (op->common.aml_opcode == AML_SCOPE_OP) {
  		ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
  				  "Ending scope Op=%p State=%p\n", op,
  				  walk_state));
  	}
  
  	object_type = walk_state->op_info->object_type;
  
  	/*
  	 * Get the Node/name from the earlier lookup
  	 * (It was saved in the *op structure)
  	 */
  	node = op->common.node;
  
  	/*
  	 * Put the Node on the object stack (Contains the ACPI Name of
  	 * this object)
  	 */
  	walk_state->operands[0] = (void *)node;
  	walk_state->num_operands = 1;
  
  	/* Pop the scope stack */
  
  	if (acpi_ns_opens_scope(object_type) &&
  	    (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
  		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);
  		if (ACPI_FAILURE(status)) {
  			goto cleanup;
  		}
  	}
  
  	/*
  	 * Named operations are as follows:
  	 *
  	 * AML_ALIAS
  	 * AML_BANKFIELD
  	 * AML_CREATEBITFIELD
  	 * AML_CREATEBYTEFIELD
  	 * AML_CREATEDWORDFIELD
  	 * AML_CREATEFIELD
  	 * AML_CREATEQWORDFIELD
  	 * AML_CREATEWORDFIELD
  	 * AML_DATA_REGION
  	 * AML_DEVICE
  	 * AML_EVENT
  	 * AML_FIELD
  	 * AML_INDEXFIELD
  	 * AML_METHOD
  	 * AML_METHODCALL
  	 * AML_MUTEX
  	 * AML_NAME
  	 * AML_NAMEDFIELD
  	 * AML_OPREGION
  	 * AML_POWERRES
  	 * AML_PROCESSOR
  	 * AML_SCOPE
  	 * AML_THERMALZONE
  	 */
  
  	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
  			  "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
  			  acpi_ps_get_opcode_name(op->common.aml_opcode),
  			  walk_state, op, node));
  
  	/* Decode the opcode */
  
  	arg = op->common.value.arg;
  
  	switch (walk_state->op_info->type) {
  #ifndef ACPI_NO_METHOD_EXECUTION
  
  	case AML_TYPE_CREATE_FIELD:
  		/*
  		 * Create the field object, but the field buffer and index must
  		 * be evaluated later during the execution phase
  		 */
  		status = acpi_ds_create_buffer_field(op, walk_state);
  		break;
  
  	case AML_TYPE_NAMED_FIELD:
  		/*
  		 * If we are executing a method, initialize the field
  		 */
  		if (walk_state->method_node) {
  			status = acpi_ds_init_field_objects(op, walk_state);
  		}
  
  		switch (op->common.aml_opcode) {
  		case AML_INDEX_FIELD_OP:
  
  			status =
  			    acpi_ds_create_index_field(op,
  						       (acpi_handle)arg->common.
  						       node, walk_state);
  			break;
  
  		case AML_BANK_FIELD_OP:
  
  			status =
  			    acpi_ds_create_bank_field(op, arg->common.node,
  						      walk_state);
  			break;
  
  		case AML_FIELD_OP:
  
  			status =
  			    acpi_ds_create_field(op, arg->common.node,
  						 walk_state);
  			break;
  
  		default:
  
  			/* All NAMED_FIELD opcodes must be handled above */
  			break;
  		}
  		break;
  
  	case AML_TYPE_NAMED_SIMPLE:
  
  		status = acpi_ds_create_operands(walk_state, arg);
  		if (ACPI_FAILURE(status)) {
  			goto cleanup;
  		}
  
  		switch (op->common.aml_opcode) {
  		case AML_PROCESSOR_OP:
  
  			status = acpi_ex_create_processor(walk_state);
  			break;
  
  		case AML_POWER_RES_OP:
  
  			status = acpi_ex_create_power_resource(walk_state);
  			break;
  
  		case AML_MUTEX_OP:
  
  			status = acpi_ex_create_mutex(walk_state);
  			break;
  
  		case AML_EVENT_OP:
  
  			status = acpi_ex_create_event(walk_state);
  			break;
  
  		case AML_ALIAS_OP:
  
  			status = acpi_ex_create_alias(walk_state);
  			break;
  
  		default:
  
  			/* Unknown opcode */
  
  			status = AE_OK;
  			goto cleanup;
  		}
  
  		/* Delete operands */
  
  		for (i = 1; i < walk_state->num_operands; i++) {
  			acpi_ut_remove_reference(walk_state->operands[i]);
  			walk_state->operands[i] = NULL;
  		}
  
  		break;
  #endif				/* ACPI_NO_METHOD_EXECUTION */
  
  	case AML_TYPE_NAMED_COMPLEX:
  
  		switch (op->common.aml_opcode) {
  #ifndef ACPI_NO_METHOD_EXECUTION
  		case AML_REGION_OP:
  		case AML_DATA_REGION_OP:
  
  			if (op->common.aml_opcode == AML_REGION_OP) {
  				region_space = (acpi_adr_space_type)
  				    ((op->common.value.arg)->common.value.
  				     integer);
  			} else {
  				region_space = ACPI_ADR_SPACE_DATA_TABLE;
  			}
  
  			/*
  			 * The op_region is not fully parsed at this time. The only valid
  			 * argument is the space_id. (We must save the address of the
  			 * AML of the address and length operands)
  			 *
  			 * If we have a valid region, initialize it. The namespace is
  			 * unlocked at this point.
  			 *
  			 * Need to unlock interpreter if it is locked (if we are running
  			 * a control method), in order to allow _REG methods to be run
  			 * during acpi_ev_initialize_region.
  			 */
  			if (walk_state->method_node) {
  				/*
  				 * Executing a method: initialize the region and unlock
  				 * the interpreter
  				 */
  				status = acpi_ex_create_region(op->named.data,
  							       op->named.length,
  							       region_space,
  							       walk_state);
  				if (ACPI_FAILURE(status)) {
  					return_ACPI_STATUS(status);
  				}
  			}
  
  			status =
  			    acpi_ev_initialize_region
  			    (acpi_ns_get_attached_object(node));
  			break;
  
  		case AML_NAME_OP:
  
  			status = acpi_ds_create_node(walk_state, node, op);
  			break;
  
  		case 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);
  				}
  			}
  			break;
  
  #endif				/* ACPI_NO_METHOD_EXECUTION */
  
  		default:
  
  			/* All NAMED_COMPLEX opcodes must be handled above */
  			break;
  		}
  		break;
  
  	case AML_CLASS_INTERNAL:
  
  		/* case AML_INT_NAMEPATH_OP: */
  		break;
  
  	case AML_CLASS_METHOD_CALL:
  
  		ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
  				  "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
  				  walk_state, op, node));
  
  		/*
  		 * Lookup the method name and save the Node
  		 */
  		status =
  		    acpi_ns_lookup(walk_state->scope_info,
  				   arg->common.value.string, ACPI_TYPE_ANY,
  				   ACPI_IMODE_LOAD_PASS2,
  				   ACPI_NS_SEARCH_PARENT |
  				   ACPI_NS_DONT_OPEN_SCOPE, walk_state,
  				   &(new_node));
  		if (ACPI_SUCCESS(status)) {
  			/*
  			 * Make sure that what we found is indeed a method
  			 * We didn't search for a method on purpose, to see if the name
  			 * would resolve
  			 */
  			if (new_node->type != ACPI_TYPE_METHOD) {
  				status = AE_AML_OPERAND_TYPE;
  			}
  
  			/* We could put the returned object (Node) on the object stack for
  			 * later, but for now, we will put it in the "op" object that the
  			 * parser uses, so we can get it again at the end of this scope
  			 */
  			op->common.node = new_node;
  		} else {
  			ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
  		}
  		break;
  
  	default:
  
  		break;
  	}
  
  cleanup:
  
  	/* Remove the Node pushed at the very beginning */
  
  	walk_state->operands[0] = NULL;
  	walk_state->num_operands = 0;
  	return_ACPI_STATUS(status);
  }
  