- /*
- * This registration is valid for only the types below
- * and the root. This is where the default handlers
- * get placed.
- */
- if ((node->type != ACPI_TYPE_DEVICE) &&
- (node->type != ACPI_TYPE_PROCESSOR) &&
- (node->type != ACPI_TYPE_THERMAL) &&
- (node != acpi_gbl_root_node)) {
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
- }
-
- if (handler == ACPI_DEFAULT_HANDLER) {
- flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
-
- switch (space_id) {
- case ACPI_ADR_SPACE_SYSTEM_MEMORY:
- handler = acpi_ex_system_memory_space_handler;
- setup = acpi_ev_system_memory_region_setup;
- break;
-
- case ACPI_ADR_SPACE_SYSTEM_IO:
- handler = acpi_ex_system_io_space_handler;
- setup = acpi_ev_io_space_region_setup;
- break;
-
- case ACPI_ADR_SPACE_PCI_CONFIG:
- handler = acpi_ex_pci_config_space_handler;
- setup = acpi_ev_pci_config_region_setup;
- break;
-
- case ACPI_ADR_SPACE_CMOS:
- handler = acpi_ex_cmos_space_handler;
- setup = acpi_ev_cmos_region_setup;
- break;
-
- case ACPI_ADR_SPACE_PCI_BAR_TARGET:
- handler = acpi_ex_pci_bar_space_handler;
- setup = acpi_ev_pci_bar_region_setup;
- break;
-
- case ACPI_ADR_SPACE_DATA_TABLE:
- handler = acpi_ex_data_table_space_handler;
- setup = NULL;
- break;
-
- default:
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
- }
- }
-
- /* If the caller hasn't specified a setup routine, use the default */
-
- if (!setup) {
- setup = acpi_ev_default_region_setup;
- }
-
- /* Check for an existing internal object */
-
- obj_desc = acpi_ns_get_attached_object (node);
- if (obj_desc) {
- /*
- * The attached device object already exists.
- * Make sure the handler is not already installed.
- */
- handler_obj = obj_desc->device.handler;
-
- /* Walk the handler list for this device */
-
- while (handler_obj) {
- /* Same space_id indicates a handler already installed */
-
- if(handler_obj->address_space.space_id == space_id) {
- if (handler_obj->address_space.handler == handler) {
- /*
- * It is (relatively) OK to attempt to install the SAME
- * handler twice. This can easily happen with PCI_Config space.
- */
- status = AE_SAME_HANDLER;
- goto unlock_and_exit;
- }
- else {
- /* A handler is already installed */
-
- status = AE_ALREADY_EXISTS;
- }
- goto unlock_and_exit;
- }
-
- /* Walk the linked list of handlers */
-
- handler_obj = handler_obj->address_space.next;
- }
- }
- else {
- ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
- "Creating object on Device %p while installing handler\n", node));
-
- /* obj_desc does not exist, create one */
-
- if (node->type == ACPI_TYPE_ANY) {
- type = ACPI_TYPE_DEVICE;
- }
- else {
- type = node->type;
- }
-
- obj_desc = acpi_ut_create_internal_object (type);
- if (!obj_desc) {
- status = AE_NO_MEMORY;
- goto unlock_and_exit;
- }
-
- /* Init new descriptor */
-
- obj_desc->common.type = (u8) type;
-
- /* Attach the new object to the Node */