示例#1
0
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
{
	acpi_status status;
	union acpi_parse_object *op;
	struct acpi_walk_state *walk_state;

	ACPI_FUNCTION_TRACE(ps_execute_method);

	

	if (!info || !info->resolved_node) {
		return_ACPI_STATUS(AE_NULL_ENTRY);
	}

	

	status =
	    acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
					   NULL);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	
	acpi_ps_update_parameter_list(info, REF_INCREMENT);

	

	acpi_ps_start_trace(info);

	
	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
			  info->resolved_node->name.ascii, info->resolved_node,
			  info->obj_desc));

	

	op = acpi_ps_create_scope_op();
	if (!op) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	

	info->pass_number = ACPI_IMODE_EXECUTE;
	walk_state =
	    acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
				      NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
				       info->obj_desc->method.aml_start,
				       info->obj_desc->method.aml_length, info,
				       info->pass_number);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	if (info->obj_desc->method.flags & AOPOBJ_MODULE_LEVEL) {
		walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
	}

	

	if (info->obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
		status = info->obj_desc->method.implementation(walk_state);
		info->return_object = walk_state->return_desc;

		

		acpi_ds_scope_stack_clear(walk_state);
		acpi_ps_cleanup_scope(&walk_state->parser_state);
		acpi_ds_terminate_control_method(walk_state->method_desc,
						 walk_state);
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	
	if (acpi_gbl_enable_interpreter_slack) {
		walk_state->implicit_return_obj =
		    acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
		if (!walk_state->implicit_return_obj) {
			status = AE_NO_MEMORY;
			acpi_ds_delete_walk_state(walk_state);
			goto cleanup;
		}

		walk_state->implicit_return_obj->integer.value = 0;
	}

	

	status = acpi_ps_parse_aml(walk_state);

	

      cleanup:
	acpi_ps_delete_parse_tree(op);

	

	acpi_ps_stop_trace(info);

	

	acpi_ps_update_parameter_list(info, REF_DECREMENT);

	

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

	
	if (info->return_object) {
		ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
				  info->return_object));
		ACPI_DUMP_STACK_ENTRY(info->return_object);

		status = AE_CTRL_RETURN_VALUE;
	}

	return_ACPI_STATUS(status);
}
示例#2
0
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
{
	acpi_status status;
	union acpi_parse_object *op;
	struct acpi_walk_state *walk_state;

	ACPI_FUNCTION_TRACE(ps_execute_method);

	/* Quick validation of DSDT header */

	acpi_tb_check_dsdt_header();

	/* Validate the Info and method Node */

	if (!info || !info->resolved_node) {
		return_ACPI_STATUS(AE_NULL_ENTRY);
	}

	/* Init for new method, wait on concurrency semaphore */

	status =
	    acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
					   NULL);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * The caller "owns" the parameters, so give each one an extra reference
	 */
	acpi_ps_update_parameter_list(info, REF_INCREMENT);

	/* Begin tracing if requested */

	acpi_ps_start_trace(info);

	/*
	 * Execute the method. Performs parse simultaneously
	 */
	ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
			  "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
			  info->resolved_node->name.ascii, info->resolved_node,
			  info->obj_desc));

	/* Create and init a Root Node */

	op = acpi_ps_create_scope_op();
	if (!op) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Create and initialize a new walk state */

	info->pass_number = ACPI_IMODE_EXECUTE;
	walk_state =
	    acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
				      NULL, NULL);
	if (!walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
				       info->obj_desc->method.aml_start,
				       info->obj_desc->method.aml_length, info,
				       info->pass_number);
	if (ACPI_FAILURE(status)) {
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
		walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
	}

	/* Invoke an internal method if necessary */

	if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
		status =
		    info->obj_desc->method.dispatch.implementation(walk_state);
		info->return_object = walk_state->return_desc;

		/* Cleanup states */

		acpi_ds_scope_stack_clear(walk_state);
		acpi_ps_cleanup_scope(&walk_state->parser_state);
		acpi_ds_terminate_control_method(walk_state->method_desc,
						 walk_state);
		acpi_ds_delete_walk_state(walk_state);
		goto cleanup;
	}

	/*
	 * Start method evaluation with an implicit return of zero.
	 * This is done for Windows compatibility.
	 */
	if (acpi_gbl_enable_interpreter_slack) {
		walk_state->implicit_return_obj =
		    acpi_ut_create_integer_object((u64) 0);
		if (!walk_state->implicit_return_obj) {
			status = AE_NO_MEMORY;
			acpi_ds_delete_walk_state(walk_state);
			goto cleanup;
		}
	}

	/* Parse the AML */

	status = acpi_ps_parse_aml(walk_state);

	/* walk_state was deleted by parse_aml */

      cleanup:
	acpi_ps_delete_parse_tree(op);

	/* End optional tracing */

	acpi_ps_stop_trace(info);

	/* Take away the extra reference that we gave the parameters above */

	acpi_ps_update_parameter_list(info, REF_DECREMENT);

	/* Exit now if error above */

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

	/*
	 * If the method has returned an object, signal this to the caller with
	 * a control exception code
	 */
	if (info->return_object) {
		ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
				  info->return_object));
		ACPI_DUMP_STACK_ENTRY(info->return_object);

		status = AE_CTRL_RETURN_VALUE;
	}

	return_ACPI_STATUS(status);
}