Example #1
0
acpi_status
acpi_ds_call_control_method(struct acpi_thread_state *thread,
			    struct acpi_walk_state *this_walk_state,
			    union acpi_parse_object *op)
{
	acpi_status status;
	struct acpi_namespace_node *method_node;
	struct acpi_walk_state *next_walk_state = NULL;
	union acpi_operand_object *obj_desc;
	struct acpi_evaluate_info *info;
	u32 i;

	ACPI_FUNCTION_TRACE_PTR(ds_call_control_method, this_walk_state);

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "Calling method %p, currentstate=%p\n",
			  this_walk_state->prev_op, this_walk_state));

	/*
	 * Get the namespace entry for the control method we are about to call
	 */
	method_node = this_walk_state->method_call_node;
	if (!method_node) {
		return_ACPI_STATUS(AE_NULL_ENTRY);
	}

	obj_desc = acpi_ns_get_attached_object(method_node);
	if (!obj_desc) {
		return_ACPI_STATUS(AE_NULL_OBJECT);
	}

	/* Init for new method, possibly wait on method mutex */

	status = acpi_ds_begin_method_execution(method_node, obj_desc,
						this_walk_state);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Begin method parse/execution. Create a new walk state */

	next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id,
						    NULL, obj_desc, thread);
	if (!next_walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/*
	 * The resolved arguments were put on the previous walk state's operand
	 * stack. Operands on the previous walk state stack always
	 * start at index 0. Also, null terminate the list of arguments
	 */
	this_walk_state->operands[this_walk_state->num_operands] = NULL;

	/*
	 * Allocate and initialize the evaluation information block
	 * TBD: this is somewhat inefficient, should change interface to
	 * ds_init_aml_walk. For now, keeps this struct off the CPU stack
	 */
	info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
	if (!info) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	info->parameters = &this_walk_state->operands[0];
	info->parameter_type = ACPI_PARAM_ARGS;

	status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node,
				       obj_desc->method.aml_start,
				       obj_desc->method.aml_length, info,
				       ACPI_IMODE_EXECUTE);

	ACPI_FREE(info);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/*
	 * Delete the operands on the previous walkstate operand stack
	 * (they were copied to new objects)
	 */
	for (i = 0; i < obj_desc->method.param_count; i++) {
		acpi_ut_remove_reference(this_walk_state->operands[i]);
		this_walk_state->operands[i] = NULL;
	}

	/* Clear the operand stack */

	this_walk_state->num_operands = 0;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "**** Begin nested execution of [%4.4s] **** WalkState=%p\n",
			  method_node->name.ascii, next_walk_state));

	/* Invoke an internal method if necessary */

	if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
		status = obj_desc->method.implementation(next_walk_state);
	}

	return_ACPI_STATUS(status);

      cleanup:

	/* On error, we must terminate the method properly */

	acpi_ds_terminate_control_method(obj_desc, next_walk_state);
	if (next_walk_state) {
		acpi_ds_delete_walk_state(next_walk_state);
	}

	return_ACPI_STATUS(status);
}
acpi_status
acpi_ds_call_control_method(struct acpi_thread_state *thread,
			    struct acpi_walk_state *this_walk_state,
			    union acpi_parse_object *op)
{
	acpi_status status;
	struct acpi_namespace_node *method_node;
	struct acpi_walk_state *next_walk_state = NULL;
	union acpi_operand_object *obj_desc;
	struct acpi_parameter_info info;
	u32 i;

	ACPI_FUNCTION_TRACE_PTR("ds_call_control_method", this_walk_state);

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "Execute method %p, currentstate=%p\n",
			  this_walk_state->prev_op, this_walk_state));

	/*
	 * Get the namespace entry for the control method we are about to call
	 */
	method_node = this_walk_state->method_call_node;
	if (!method_node) {
		return_ACPI_STATUS(AE_NULL_ENTRY);
	}

	obj_desc = acpi_ns_get_attached_object(method_node);
	if (!obj_desc) {
		return_ACPI_STATUS(AE_NULL_OBJECT);
	}

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

	status = acpi_ds_begin_method_execution(method_node, obj_desc,
						this_walk_state->method_node);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	if (!(obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY)) {
		/* 1) Parse: Create a new walk state for the preempting walk */

		next_walk_state =
		    acpi_ds_create_walk_state(obj_desc->method.owner_id, op,
					      obj_desc, NULL);
		if (!next_walk_state) {
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/* Create and init a Root Node */

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

		status = acpi_ds_init_aml_walk(next_walk_state, op, method_node,
					       obj_desc->method.aml_start,
					       obj_desc->method.aml_length,
					       NULL, 1);
		if (ACPI_FAILURE(status)) {
			acpi_ds_delete_walk_state(next_walk_state);
			goto cleanup;
		}

		/* Begin AML parse */

		status = acpi_ps_parse_aml(next_walk_state);
		acpi_ps_delete_parse_tree(op);
	}

	/* 2) Execute: Create a new state for the preempting walk */

	next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id,
						    NULL, obj_desc, thread);
	if (!next_walk_state) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}
	/*
	 * The resolved arguments were put on the previous walk state's operand
	 * stack. Operands on the previous walk state stack always
	 * start at index 0. Also, null terminate the list of arguments
	 */
	this_walk_state->operands[this_walk_state->num_operands] = NULL;

	info.parameters = &this_walk_state->operands[0];
	info.parameter_type = ACPI_PARAM_ARGS;

	status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node,
				       obj_desc->method.aml_start,
				       obj_desc->method.aml_length, &info, 3);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/*
	 * Delete the operands on the previous walkstate operand stack
	 * (they were copied to new objects)
	 */
	for (i = 0; i < obj_desc->method.param_count; i++) {
		acpi_ut_remove_reference(this_walk_state->operands[i]);
		this_walk_state->operands[i] = NULL;
	}

	/* Clear the operand stack */

	this_walk_state->num_operands = 0;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "Starting nested execution, newstate=%p\n",
			  next_walk_state));

	if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
		status = obj_desc->method.implementation(next_walk_state);
	}

	return_ACPI_STATUS(status);

      cleanup:
	/* Decrement the thread count on the method parse tree */

	if (next_walk_state && (next_walk_state->method_desc)) {
		next_walk_state->method_desc->method.thread_count--;
	}

	/* On error, we must delete the new walk state */

	acpi_ds_terminate_control_method(next_walk_state);
	acpi_ds_delete_walk_state(next_walk_state);
	return_ACPI_STATUS(status);
}
Example #3
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);
}
Example #4
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);
}
Example #5
0
ACPI_STATUS
acpi_ds_call_control_method (
	ACPI_WALK_LIST          *walk_list,
	ACPI_WALK_STATE         *this_walk_state,
	ACPI_PARSE_OBJECT       *op)
{
	ACPI_STATUS             status;
	ACPI_NAMESPACE_NODE     *method_node;
	ACPI_OPERAND_OBJECT     *obj_desc;
	ACPI_WALK_STATE         *next_walk_state;
	ACPI_PARSE_STATE        *parser_state;
	u32                     i;


	/*
	 * Get the namespace entry for the control method we are about to call
	 */

	method_node = this_walk_state->method_call_node;
	if (!method_node) {
		return (AE_NULL_ENTRY);
	}

	obj_desc = acpi_ns_get_attached_object (method_node);
	if (!obj_desc) {
		return (AE_NULL_OBJECT);
	}


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

	status = acpi_ds_begin_method_execution (method_node, obj_desc);
	if (ACPI_FAILURE (status)) {
		return (status);
	}


	/* Create and initialize a new parser state */

	parser_state = acpi_ps_create_state (obj_desc->method.pcode,
			   obj_desc->method.pcode_length);
	if (!parser_state) {
		return (AE_NO_MEMORY);
	}

	acpi_ps_init_scope (parser_state, NULL);
	parser_state->start_node = method_node;


	/* Create a new state for the preempting walk */

	next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id,
			  NULL, obj_desc, walk_list);
	if (!next_walk_state) {
		/* TBD: delete parser state */

		return (AE_NO_MEMORY);
	}

	next_walk_state->walk_type          = WALK_METHOD;
	next_walk_state->method_node        = method_node;
	next_walk_state->parser_state       = parser_state;
	next_walk_state->parse_flags        = this_walk_state->parse_flags;
	next_walk_state->descending_callback = this_walk_state->descending_callback;
	next_walk_state->ascending_callback = this_walk_state->ascending_callback;

	/* The Next_op of the Next_walk will be the beginning of the method */
	/* TBD: [Restructure] -- obsolete? */

	next_walk_state->next_op = NULL;

	/* Open a new scope */

	status = acpi_ds_scope_stack_push (method_node,
			   ACPI_TYPE_METHOD, next_walk_state);
	if (ACPI_FAILURE (status)) {
		goto cleanup;
	}


	/*
	 * Initialize the arguments for the method.  The resolved
	 * arguments were put on the previous walk state's operand
	 * stack.  Operands on the previous walk state stack always
	 * start at index 0.
	 */

	status = acpi_ds_method_data_init_args (&this_walk_state->operands[0],
			 this_walk_state->num_operands,
			 next_walk_state);
	if (ACPI_FAILURE (status)) {
		goto cleanup;
	}


	/* Create and init a Root Node */

	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return (AE_NO_MEMORY);
	}

	status = acpi_ps_parse_aml (op, obj_desc->method.pcode,
			  obj_desc->method.pcode_length,
			  ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE,
			  method_node, NULL, NULL,
			  acpi_ds_load1_begin_op, acpi_ds_load1_end_op);
	acpi_ps_delete_parse_tree (op);


	/*
	 * Delete the operands on the previous walkstate operand stack
	 * (they were copied to new objects)
	 */

	for (i = 0; i < obj_desc->method.param_count; i++) {
		acpi_cm_remove_reference (this_walk_state->operands [i]);
		this_walk_state->operands [i] = NULL;
	}

	/* Clear the operand stack */

	this_walk_state->num_operands = 0;


	return (AE_OK);


	/* On error, we must delete the new walk state */

cleanup:
	acpi_ds_terminate_control_method (next_walk_state);
	acpi_ds_delete_walk_state (next_walk_state);
	return (status);

}