/******************************************************************************* * * FUNCTION: acpi_ns_attach_object * * PARAMETERS: node - Parent Node * object - Object to be attached * type - Type of object, or ACPI_TYPE_ANY if not * known * * RETURN: Status * * DESCRIPTION: Record the given object as the value associated with the * name whose acpi_handle is passed. If Object is NULL * and Type is ACPI_TYPE_ANY, set the name as having no value. * Note: Future may require that the Node->Flags field be passed * as a parameter. * * MUTEX: Assumes namespace is locked *
******************************************************************************/
acpi_status
acpi_ns_attach_object(struct acpi_namespace_node *node, union acpi_operand_object *object, acpi_object_type type)
{ union acpi_operand_object *obj_desc; union acpi_operand_object *last_obj_desc;
acpi_object_type object_type = ACPI_TYPE_ANY;
if (node->object == object) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj %p already installed in NameObj %p\n",
object, node));
return_ACPI_STATUS(AE_OK);
}
/* If null object, we will just install it */
if (!object) {
obj_desc = NULL;
object_type = ACPI_TYPE_ANY;
}
/* * If the source object is a namespace Node with an attached object, * we will use that (attached) object
*/ elseif ((ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) &&
((struct acpi_namespace_node *)object)->object) { /* * Value passed is a name handle and that name has a * non-null value. Use that name's value and type.
*/
obj_desc = ((struct acpi_namespace_node *)object)->object;
object_type = ((struct acpi_namespace_node *)object)->type;
}
/* * Otherwise, we will use the parameter object, but we must type * it first
*/ else {
obj_desc = (union acpi_operand_object *)object;
/* Use the given type */
object_type = type;
}
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n",
obj_desc, node, acpi_ut_get_node_name(node)));
/* Detach an existing attached object if present */
if (node->object) {
acpi_ns_detach_object(node);
}
if (obj_desc) { /* * Must increment the new value's reference count * (if it is an internal object)
*/
acpi_ut_add_reference(obj_desc);
/* * Handle objects with multiple descriptors - walk * to the end of the descriptor list
*/
last_obj_desc = obj_desc; while (last_obj_desc->common.next_object) {
last_obj_desc = last_obj_desc->common.next_object;
}
/* Install the object at the front of the object list */
/******************************************************************************* * * FUNCTION: acpi_ns_detach_object * * PARAMETERS: node - A Namespace node whose object will be detached * * RETURN: None. * * DESCRIPTION: Detach/delete an object associated with a namespace node. * if the object is an allocated object, it is freed. * Otherwise, the field is simply cleared. *
******************************************************************************/
void acpi_ns_detach_object(struct acpi_namespace_node *node)
{ union acpi_operand_object *obj_desc;
ACPI_FUNCTION_TRACE(ns_detach_object);
obj_desc = node->object;
if (!obj_desc || (obj_desc->common.type == ACPI_TYPE_LOCAL_DATA)) {
return_VOID;
}
if (node->flags & ANOBJ_ALLOCATED_BUFFER) {
/* Free the dynamic aml buffer */
if (obj_desc->common.type == ACPI_TYPE_METHOD) {
ACPI_FREE(obj_desc->method.aml_start);
}
}
if (obj_desc->common.type == ACPI_TYPE_REGION) {
acpi_ut_remove_address_range(obj_desc->region.space_id, node);
}
/* Clear the Node entry in all cases */
node->object = NULL; if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == ACPI_DESC_TYPE_OPERAND) {
/* Unlink object from front of possible object list */
/* * Detach the object from any data objects (which are still held by * the namespace node)
*/ if (obj_desc->common.next_object &&
((obj_desc->common.next_object)->common.type ==
ACPI_TYPE_LOCAL_DATA)) {
obj_desc->common.next_object = NULL;
}
}
/******************************************************************************* * * FUNCTION: acpi_ns_get_attached_object * * PARAMETERS: node - Namespace node * * RETURN: Current value of the object field from the Node whose * handle is passed * * DESCRIPTION: Obtain the object attached to a namespace node. *
******************************************************************************/
union acpi_operand_object *acpi_ns_get_attached_object(struct
acpi_namespace_node
*node)
{
ACPI_FUNCTION_TRACE_PTR(ns_get_attached_object, node);
if (!node) {
ACPI_WARNING((AE_INFO, "Null Node ptr"));
return_PTR(NULL);
}
/******************************************************************************* * * FUNCTION: acpi_ns_get_secondary_object * * PARAMETERS: node - Namespace node * * RETURN: Current value of the object field from the Node whose * handle is passed. * * DESCRIPTION: Obtain a secondary object associated with a namespace node. *
******************************************************************************/
union acpi_operand_object *acpi_ns_get_secondary_object(union
acpi_operand_object
*obj_desc)
{
ACPI_FUNCTION_TRACE_PTR(ns_get_secondary_object, obj_desc);
/******************************************************************************* * * FUNCTION: acpi_ns_attach_data * * PARAMETERS: node - Namespace node * handler - Handler to be associated with the data * data - Data to be attached * * RETURN: Status * * DESCRIPTION: Low-level attach data. Create and attach a Data object. *
******************************************************************************/
acpi_status
acpi_ns_attach_data(struct acpi_namespace_node *node,
acpi_object_handler handler, void *data)
{ union acpi_operand_object *prev_obj_desc; union acpi_operand_object *obj_desc; union acpi_operand_object *data_desc;
/******************************************************************************* * * FUNCTION: acpi_ns_detach_data * * PARAMETERS: node - Namespace node * handler - Handler associated with the data * * RETURN: Status * * DESCRIPTION: Low-level detach data. Delete the data node, but the caller * is responsible for the actual data. *
******************************************************************************/
acpi_status
acpi_ns_detach_data(struct acpi_namespace_node *node,
acpi_object_handler handler)
{ union acpi_operand_object *obj_desc; union acpi_operand_object *prev_obj_desc;
/******************************************************************************* * * FUNCTION: acpi_ns_get_attached_data * * PARAMETERS: node - Namespace node * handler - Handler associated with the data * data - Where the data is returned * * RETURN: Status * * DESCRIPTION: Low level interface to obtain data previously associated with * a namespace node. *
******************************************************************************/
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