dsobject.c

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


	ACPI_FUNCTION_TRACE ("Ds_build_internal_object");


	if (op->opcode == AML_INT_NAMEPATH_OP) {
		/*
		 * This is an object reference.  If this name was
		 * previously looked up in the namespace, it was 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, ACPI_IMODE_EXECUTE,
					  ACPI_NS_SEARCH_PARENT | ACPI_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, NULL, &name);

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

	/* Create and init the internal ACPI object */

	obj_desc = acpi_ut_create_internal_object ((acpi_ps_get_opcode_info (op->opcode))->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_buffer_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_buffer_obj (
	acpi_walk_state         *walk_state,
	acpi_parse_object       *op,
	u32                     buffer_length,
	acpi_operand_object     **obj_desc_ptr)
{
	acpi_parse_object       *arg;
	acpi_operand_object     *obj_desc;
	acpi_parse2_object      *byte_list;
	u32                     byte_list_length = 0;


	ACPI_FUNCTION_TRACE ("Ds_build_internal_buffer_obj");


	obj_desc = *obj_desc_ptr;
	if (obj_desc) {
		/*
		 * We are evaluating a Named buffer object "Name (xxxx, Buffer)".
		 * The buffer object already exists (from the NS node)
		 */
	}
	else {
		/* Create a new buffer object */

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

	/*
	 * Second arg is the buffer data (optional) Byte_list can be either
	 * individual bytes or a string initializer.  In either case, a
	 * Byte_list appears in the AML.
	 */
	arg = op->value.arg;         /* skip first arg */

	byte_list = (acpi_parse2_object *) arg->next;
	if (byte_list) {
		if (byte_list->opcode != AML_INT_BYTELIST_OP) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
				"Expecting bytelist, got AML opcode %X in op %p\n",
				byte_list->opcode, byte_list));

			acpi_ut_remove_reference (obj_desc);
			return (AE_TYPE);
		}

		byte_list_length = byte_list->value.integer32;
	}

	/*
	 * The buffer length (number of bytes) will be the larger of:
	 * 1) The specified buffer length and
	 * 2) The length of the initializer byte list
	 */
	obj_desc->buffer.length = buffer_length;
	if (byte_list_length > buffer_length) {
		obj_desc->buffer.length = byte_list_length;
	}

	/* Allocate the buffer */

	if (obj_desc->buffer.length == 0) {
		obj_desc->buffer.pointer = NULL;
		ACPI_REPORT_WARNING (("Buffer created with zero length in AML\n"));
		return_ACPI_STATUS (AE_OK);
	}

	obj_desc->buffer.pointer = ACPI_MEM_CALLOCATE (
			   obj_desc->buffer.length);
	if (!obj_desc->buffer.pointer) {
		acpi_ut_delete_object_desc (obj_desc);
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	/* Initialize buffer from the Byte_list (if present) */

	if (byte_list) {
		ACPI_MEMCPY (obj_desc->buffer.pointer, byte_list->data,
				  byte_list_length);
	}

	obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
	op->node = (acpi_namespace_node *) 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,
	u32                     package_length,
	acpi_operand_object     **obj_desc_ptr)
{
	acpi_parse_object       *arg;
	acpi_parse_object       *parent;
	acpi_operand_object     *obj_desc = NULL;
	u32                     package_list_length;
	acpi_status             status = AE_OK;
	u32                     i;


	ACPI_FUNCTION_TRACE ("Ds_build_internal_package_obj");


	/* Find the parent of a possibly nested package */


	parent = op->parent;
	while ((parent->opcode == AML_PACKAGE_OP)     ||
		   (parent->opcode == AML_VAR_PACKAGE_OP)) {
		parent = parent->parent;
	}

	obj_desc = *obj_desc_ptr;
	if (obj_desc) {
		/*
		 * We are evaluating a Named package object "Name (xxxx, Package)".
		 * Get the existing package object from the NS node
		 */
	}
	else {
		obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE);
		*obj_desc_ptr = obj_desc;
		if (!obj_desc) {
			return_ACPI_STATUS (AE_NO_MEMORY);
		}

		obj_desc->package.node = parent->node;
	}

	obj_desc->package.count = package_length;

	/* Count the number of items in the package list */

	package_list_length = 0;
	arg = op->value.arg;
	arg = arg->next;
	while (arg) {
		package_list_length++;
		arg = arg->next;
	}

	/*
	 * The package length (number of elements) will be the greater
	 * of the specified length and the length of the initializer list
	 */
	if (package_list_length > package_length) {
		obj_desc->package.count = package_list_length;
	}

	/*
	 * Allocate the pointer array (array of pointers 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);
	}

	/*
	 * Now init the elements of the package
	 */
	i = 0;
	arg = op->value.arg;
	arg = arg->next;
	while (arg) {
		if (arg->opcode == AML_INT_RETURN_VALUE_OP) {
			/* Object (package or buffer) is already built */

			obj_desc->package.elements[i] = (acpi_operand_object *) arg->node;
		}
		else {
			status = acpi_ds_build_internal_object (walk_state, arg,
					  &obj_desc->package.elements[i]);
		}

		i++;
		arg = arg->next;
	}

	obj_desc->package.flags |= AOPOBJ_DATA_VALID;
	op->node = (acpi_namespace_node *) obj_desc;
	return_ACPI_STATUS (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;


	ACPI_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 (acpi_ns_get_attached_object (node)) {
		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;

	/* Attach obj to node */

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

	/* Remove local reference to the object */

	acpi_ut_remove_reference (obj_desc);
	return_ACPI_STATUS (status);
}