dsobject.c

一个2.4.21版本的嵌入式linux内核

		obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
		break;


	case ACPI_TYPE_METHOD:
		break;


	case INTERNAL_TYPE_REFERENCE:

		switch (op_info->type) {
		case AML_TYPE_LOCAL_VARIABLE:

			/* Split the opcode into a base opcode + offset */

			obj_desc->reference.opcode = AML_LOCAL_OP;
			obj_desc->reference.offset = opcode - AML_LOCAL_OP;
			break;


		case AML_TYPE_METHOD_ARGUMENT:

			/* Split the opcode into a base opcode + offset */

			obj_desc->reference.opcode = AML_ARG_OP;
			obj_desc->reference.offset = opcode - AML_ARG_OP;
			break;


		default: /* Constants, Literals, etc.. */

			if (op->opcode == AML_INT_NAMEPATH_OP) {
				/* Node was saved in Op */

				obj_desc->reference.node = op->node;
			}

			obj_desc->reference.opcode = opcode;
			break;
		}

		break;


	default:

		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unimplemented data type: %x\n",
			obj_desc->common.type));

		break;
	}

	return (AE_OK);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_build_internal_simple_obj
 *
 * PARAMETERS:  Op              - Parser object to be translated
 *              Obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
 *              Simple objects are any objects other than a package object!
 *
 ****************************************************************************/

static acpi_status
acpi_ds_build_internal_simple_obj (
	acpi_walk_state         *walk_state,
	acpi_parse_object       *op,
	acpi_operand_object     **obj_desc_ptr)
{
	acpi_operand_object     *obj_desc;
	acpi_object_type8       type;
	acpi_status             status;
	u32                     length;
	char                    *name;


	FUNCTION_TRACE ("Ds_build_internal_simple_obj");


	if (op->opcode == AML_INT_NAMEPATH_OP) {
		/*
		 * This is an object reference.  If The name was
		 * previously looked up in the NS, it is stored in this op.
		 * Otherwise, go ahead and look it up now
		 */
		if (!op->node) {
			status = acpi_ns_lookup (walk_state->scope_info,
					  op->value.string, ACPI_TYPE_ANY,
					  IMODE_EXECUTE,
					  NS_SEARCH_PARENT | NS_DONT_OPEN_SCOPE,
					  NULL,
					  (acpi_namespace_node **)&(op->node));

			if (ACPI_FAILURE (status)) {
				if (status == AE_NOT_FOUND) {
					name = NULL;
					acpi_ns_externalize_name (ACPI_UINT32_MAX, op->value.string, &length, &name);

					if (name) {
						REPORT_WARNING (("Reference %s at AML %X not found\n",
								 name, op->aml_offset));
						ACPI_MEM_FREE (name);
					}

					else {
						REPORT_WARNING (("Reference %s at AML %X not found\n",
								   op->value.string, op->aml_offset));
					}

					*obj_desc_ptr = NULL;
				}

				else {
					return_ACPI_STATUS (status);
				}
			}
		}

		/*
		 * The reference will be a Reference
		 * TBD: [Restructure] unless we really need a separate
		 *  type of INTERNAL_TYPE_REFERENCE change
		 *  Acpi_ds_map_opcode_to_data_type to handle this case
		 */
		type = INTERNAL_TYPE_REFERENCE;
	}
	else {
		type = acpi_ds_map_opcode_to_data_type (op->opcode, NULL);
	}


	/* Create and init the internal ACPI object */

	obj_desc = acpi_ut_create_internal_object (type);
	if (!obj_desc) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_object_from_op (walk_state, op, op->opcode, &obj_desc);
	if (ACPI_FAILURE (status)) {
		acpi_ut_remove_reference (obj_desc);
		return_ACPI_STATUS (status);
	}

	*obj_desc_ptr = obj_desc;

	return_ACPI_STATUS (AE_OK);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_build_internal_package_obj
 *
 * PARAMETERS:  Op              - Parser object to be translated
 *              Obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op package object to the equivalent
 *              namespace object
 *
 ****************************************************************************/

acpi_status
acpi_ds_build_internal_package_obj (
	acpi_walk_state         *walk_state,
	acpi_parse_object       *op,
	acpi_operand_object     **obj_desc_ptr)
{
	acpi_parse_object       *arg;
	acpi_operand_object     *obj_desc;
	acpi_status             status = AE_OK;


	FUNCTION_TRACE ("Ds_build_internal_package_obj");


	obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE);
	*obj_desc_ptr = obj_desc;
	if (!obj_desc) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	if (op->opcode == AML_VAR_PACKAGE_OP) {
		/*
		 * Variable length package parameters are evaluated JIT
		 */
		return_ACPI_STATUS (AE_OK);
	}

	/* The first argument must be the package length */

	arg = op->value.arg;
	obj_desc->package.count = arg->value.integer32;

	/*
	 * Allocate the array of pointers (ptrs to the
	 * individual objects) Add an extra pointer slot so
	 * that the list is always null terminated.
	 */
	obj_desc->package.elements = ACPI_MEM_CALLOCATE (
			 (obj_desc->package.count + 1) * sizeof (void *));

	if (!obj_desc->package.elements) {
		acpi_ut_delete_object_desc (obj_desc);
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	obj_desc->package.next_element = obj_desc->package.elements;

	/*
	 * Now init the elements of the package
	 */
	arg = arg->next;
	while (arg) {
		if (arg->opcode == AML_PACKAGE_OP) {
			status = acpi_ds_build_internal_package_obj (walk_state, arg,
					  obj_desc->package.next_element);
		}

		else {
			status = acpi_ds_build_internal_simple_obj (walk_state, arg,
					  obj_desc->package.next_element);
		}

		obj_desc->package.next_element++;
		arg = arg->next;
	}

	obj_desc->package.flags |= AOPOBJ_DATA_VALID;
	return_ACPI_STATUS (status);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_build_internal_object
 *
 * PARAMETERS:  Op              - Parser object to be translated
 *              Obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op object to the equivalent namespace
 *              object
 *
 ****************************************************************************/

acpi_status
acpi_ds_build_internal_object (
	acpi_walk_state         *walk_state,
	acpi_parse_object       *op,
	acpi_operand_object     **obj_desc_ptr)
{
	acpi_status             status;


	switch (op->opcode) {
	case AML_PACKAGE_OP:
	case AML_VAR_PACKAGE_OP:

		status = acpi_ds_build_internal_package_obj (walk_state, op, obj_desc_ptr);
		break;


	default:

		status = acpi_ds_build_internal_simple_obj (walk_state, op, obj_desc_ptr);
		break;
	}

	return (status);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_create_node
 *
 * PARAMETERS:  Op              - Parser object to be translated
 *              Obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION:
 *
 ****************************************************************************/

acpi_status
acpi_ds_create_node (
	acpi_walk_state         *walk_state,
	acpi_namespace_node     *node,
	acpi_parse_object       *op)
{
	acpi_status             status;
	acpi_operand_object     *obj_desc;


	FUNCTION_TRACE_PTR ("Ds_create_node", op);


	/*
	 * Because of the execution pass through the non-control-method
	 * parts of the table, we can arrive here twice.  Only init
	 * the named object node the first time through
	 */
	if (node->object) {
		return_ACPI_STATUS (AE_OK);
	}

	if (!op->value.arg) {
		/* No arguments, there is nothing to do */

		return_ACPI_STATUS (AE_OK);
	}

	/* Build an internal object for the argument(s) */

	status = acpi_ds_build_internal_object (walk_state, op->value.arg, &obj_desc);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/* Re-type the object according to it's argument */

	node->type = obj_desc->common.type;

	/* Init obj */

	status = acpi_ns_attach_object (node, obj_desc, (u8) node->type);

	/* Remove local reference to the object */

	acpi_ut_remove_reference (obj_desc);
	return_ACPI_STATUS (status);
}