2 * EFI application boot time services
4 * Copyright (c) 2016 Alexander Graf
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <efi_loader.h>
12 #include <environment.h>
14 #include <asm/global_data.h>
15 #include <libfdt_env.h>
16 #include <u-boot/crc.h>
21 DECLARE_GLOBAL_DATA_PTR;
23 /* Task priority level */
24 static efi_uintn_t efi_tpl = TPL_APPLICATION;
26 /* This list contains all the EFI objects our payload has access to */
27 LIST_HEAD(efi_obj_list);
30 * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
31 * we need to do trickery with caches. Since we don't want to break the EFI
32 * aware boot path, only apply hacks when loading exiting directly (breaking
33 * direct Linux EFI booting along the way - oh well).
35 static bool efi_is_direct_boot = true;
38 * EFI can pass arbitrary additional "tables" containing vendor specific
39 * information to the payload. One such table is the FDT table which contains
40 * a pointer to a flattened device tree blob.
42 * In most cases we want to pass an FDT to the payload, so reserve one slot of
43 * config table space for it. The pointer gets populated by do_bootefi_exec().
45 static struct efi_configuration_table __efi_runtime_data efi_conf_table[2];
49 * The "gd" pointer lives in a register on ARM and AArch64 that we declare
50 * fixed when compiling U-Boot. However, the payload does not know about that
51 * restriction so we need to manually swap its and our view of that register on
52 * EFI callback entry/exit.
54 static volatile void *efi_gd, *app_gd;
57 static int entry_count;
58 static int nesting_level;
59 /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
60 const efi_guid_t efi_guid_driver_binding_protocol =
61 EFI_DRIVER_BINDING_PROTOCOL_GUID;
63 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
64 void *driver_image_handle,
67 /* Called on every callback entry */
68 int __efi_entry_check(void)
70 int ret = entry_count++ == 0;
79 /* Called on every callback exit */
80 int __efi_exit_check(void)
82 int ret = --entry_count == 0;
89 /* Called from do_bootefi_exec() */
90 void efi_save_gd(void)
98 * Special case handler for error/abort that just forces things back
99 * to u-boot world so we can dump out an abort msg, without any care
100 * about returning back to UEFI world.
102 void efi_restore_gd(void)
105 /* Only restore if we're already in EFI context */
113 * Two spaces per indent level, maxing out at 10.. which ought to be
114 * enough for anyone ;-)
116 static const char *indent_string(int level)
118 const char *indent = " ";
119 const int max = strlen(indent);
120 level = min(max, level * 2);
121 return &indent[max - level];
124 const char *__efi_nesting(void)
126 return indent_string(nesting_level);
129 const char *__efi_nesting_inc(void)
131 return indent_string(nesting_level++);
134 const char *__efi_nesting_dec(void)
136 return indent_string(--nesting_level);
140 * Queue an EFI event.
142 * This function queues the notification function of the event for future
145 * The notification function is called if the task priority level of the
146 * event is higher than the current task priority level.
148 * For the SignalEvent service see efi_signal_event_ext.
150 * @event event to signal
152 void efi_signal_event(struct efi_event *event)
154 if (event->notify_function) {
155 event->is_queued = true;
157 if (efi_tpl >= event->notify_tpl)
159 EFI_CALL_VOID(event->notify_function(event,
160 event->notify_context));
162 event->is_queued = false;
166 * Raise the task priority level.
168 * This function implements the RaiseTpl service.
169 * See the Unified Extensible Firmware Interface (UEFI) specification
172 * @new_tpl new value of the task priority level
173 * @return old value of the task priority level
175 static unsigned long EFIAPI efi_raise_tpl(efi_uintn_t new_tpl)
177 efi_uintn_t old_tpl = efi_tpl;
179 EFI_ENTRY("0x%zx", new_tpl);
181 if (new_tpl < efi_tpl)
182 debug("WARNING: new_tpl < current_tpl in %s\n", __func__);
184 if (efi_tpl > TPL_HIGH_LEVEL)
185 efi_tpl = TPL_HIGH_LEVEL;
187 EFI_EXIT(EFI_SUCCESS);
192 * Lower the task priority level.
194 * This function implements the RestoreTpl service.
195 * See the Unified Extensible Firmware Interface (UEFI) specification
198 * @old_tpl value of the task priority level to be restored
200 static void EFIAPI efi_restore_tpl(efi_uintn_t old_tpl)
202 EFI_ENTRY("0x%zx", old_tpl);
204 if (old_tpl > efi_tpl)
205 debug("WARNING: old_tpl > current_tpl in %s\n", __func__);
207 if (efi_tpl > TPL_HIGH_LEVEL)
208 efi_tpl = TPL_HIGH_LEVEL;
210 EFI_EXIT(EFI_SUCCESS);
214 * Allocate memory pages.
216 * This function implements the AllocatePages service.
217 * See the Unified Extensible Firmware Interface (UEFI) specification
220 * @type type of allocation to be performed
221 * @memory_type usage type of the allocated memory
222 * @pages number of pages to be allocated
223 * @memory allocated memory
224 * @return status code
226 static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
232 EFI_ENTRY("%d, %d, 0x%zx, %p", type, memory_type, pages, memory);
233 r = efi_allocate_pages(type, memory_type, pages, memory);
240 * This function implements the FreePages service.
241 * See the Unified Extensible Firmware Interface (UEFI) specification
244 * @memory start of the memory area to be freed
245 * @pages number of pages to be freed
246 * @return status code
248 static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
253 EFI_ENTRY("%"PRIx64", 0x%zx", memory, pages);
254 r = efi_free_pages(memory, pages);
259 * Get map describing memory usage.
261 * This function implements the GetMemoryMap service.
262 * See the Unified Extensible Firmware Interface (UEFI) specification
265 * @memory_map_size on entry the size, in bytes, of the memory map buffer,
266 * on exit the size of the copied memory map
267 * @memory_map buffer to which the memory map is written
268 * @map_key key for the memory map
269 * @descriptor_size size of an individual memory descriptor
270 * @descriptor_version version number of the memory descriptor structure
271 * @return status code
273 static efi_status_t EFIAPI efi_get_memory_map_ext(
274 efi_uintn_t *memory_map_size,
275 struct efi_mem_desc *memory_map,
276 efi_uintn_t *map_key,
277 efi_uintn_t *descriptor_size,
278 uint32_t *descriptor_version)
282 EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
283 map_key, descriptor_size, descriptor_version);
284 r = efi_get_memory_map(memory_map_size, memory_map, map_key,
285 descriptor_size, descriptor_version);
290 * Allocate memory from pool.
292 * This function implements the AllocatePool service.
293 * See the Unified Extensible Firmware Interface (UEFI) specification
296 * @pool_type type of the pool from which memory is to be allocated
297 * @size number of bytes to be allocated
298 * @buffer allocated memory
299 * @return status code
301 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
307 EFI_ENTRY("%d, %zd, %p", pool_type, size, buffer);
308 r = efi_allocate_pool(pool_type, size, buffer);
313 * Free memory from pool.
315 * This function implements the FreePool service.
316 * See the Unified Extensible Firmware Interface (UEFI) specification
319 * @buffer start of memory to be freed
320 * @return status code
322 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
326 EFI_ENTRY("%p", buffer);
327 r = efi_free_pool(buffer);
332 * Add a new object to the object list.
334 * The protocols list is initialized.
335 * The object handle is set.
337 * @obj object to be added
339 void efi_add_handle(struct efi_object *obj)
343 INIT_LIST_HEAD(&obj->protocols);
345 list_add_tail(&obj->link, &efi_obj_list);
352 * @return status code
354 efi_status_t efi_create_handle(void **handle)
356 struct efi_object *obj;
359 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
360 sizeof(struct efi_object),
362 if (r != EFI_SUCCESS)
365 *handle = obj->handle;
370 * Find a protocol on a handle.
373 * @protocol_guid GUID of the protocol
374 * @handler reference to the protocol
375 * @return status code
377 efi_status_t efi_search_protocol(const void *handle,
378 const efi_guid_t *protocol_guid,
379 struct efi_handler **handler)
381 struct efi_object *efiobj;
382 struct list_head *lhandle;
384 if (!handle || !protocol_guid)
385 return EFI_INVALID_PARAMETER;
386 efiobj = efi_search_obj(handle);
388 return EFI_INVALID_PARAMETER;
389 list_for_each(lhandle, &efiobj->protocols) {
390 struct efi_handler *protocol;
392 protocol = list_entry(lhandle, struct efi_handler, link);
393 if (!guidcmp(protocol->guid, protocol_guid)) {
399 return EFI_NOT_FOUND;
403 * Delete protocol from a handle.
405 * @handle handle from which the protocol shall be deleted
406 * @protocol GUID of the protocol to be deleted
407 * @protocol_interface interface of the protocol implementation
408 * @return status code
410 efi_status_t efi_remove_protocol(const void *handle, const efi_guid_t *protocol,
411 void *protocol_interface)
413 struct efi_handler *handler;
416 ret = efi_search_protocol(handle, protocol, &handler);
417 if (ret != EFI_SUCCESS)
419 if (guidcmp(handler->guid, protocol))
420 return EFI_INVALID_PARAMETER;
421 list_del(&handler->link);
427 * Delete all protocols from a handle.
429 * @handle handle from which the protocols shall be deleted
430 * @return status code
432 efi_status_t efi_remove_all_protocols(const void *handle)
434 struct efi_object *efiobj;
435 struct efi_handler *protocol;
436 struct efi_handler *pos;
438 efiobj = efi_search_obj(handle);
440 return EFI_INVALID_PARAMETER;
441 list_for_each_entry_safe(protocol, pos, &efiobj->protocols, link) {
444 ret = efi_remove_protocol(handle, protocol->guid,
445 protocol->protocol_interface);
446 if (ret != EFI_SUCCESS)
455 * @handle handle to delete
457 void efi_delete_handle(struct efi_object *obj)
461 efi_remove_all_protocols(obj->handle);
462 list_del(&obj->link);
467 * Our event capabilities are very limited. Only a small limited
468 * number of events is allowed to coexist.
470 static struct efi_event efi_events[16];
475 * This function is used inside U-Boot code to create an event.
477 * For the API function implementing the CreateEvent service see
478 * efi_create_event_ext.
480 * @type type of the event to create
481 * @notify_tpl task priority level of the event
482 * @notify_function notification function of the event
483 * @notify_context pointer passed to the notification function
484 * @event created event
485 * @return status code
487 efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
488 void (EFIAPI *notify_function) (
489 struct efi_event *event,
491 void *notify_context, struct efi_event **event)
496 return EFI_INVALID_PARAMETER;
498 if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
499 return EFI_INVALID_PARAMETER;
501 if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
502 notify_function == NULL)
503 return EFI_INVALID_PARAMETER;
505 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
506 if (efi_events[i].type)
508 efi_events[i].type = type;
509 efi_events[i].notify_tpl = notify_tpl;
510 efi_events[i].notify_function = notify_function;
511 efi_events[i].notify_context = notify_context;
512 /* Disable timers on bootup */
513 efi_events[i].trigger_next = -1ULL;
514 efi_events[i].is_queued = false;
515 efi_events[i].is_signaled = false;
516 *event = &efi_events[i];
519 return EFI_OUT_OF_RESOURCES;
525 * This function implements the CreateEvent service.
526 * See the Unified Extensible Firmware Interface (UEFI) specification
529 * @type type of the event to create
530 * @notify_tpl task priority level of the event
531 * @notify_function notification function of the event
532 * @notify_context pointer passed to the notification function
533 * @event created event
534 * @return status code
536 static efi_status_t EFIAPI efi_create_event_ext(
537 uint32_t type, efi_uintn_t notify_tpl,
538 void (EFIAPI *notify_function) (
539 struct efi_event *event,
541 void *notify_context, struct efi_event **event)
543 EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
545 return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
546 notify_context, event));
551 * Check if a timer event has occurred or a queued notification function should
554 * Our timers have to work without interrupts, so we check whenever keyboard
555 * input or disk accesses happen if enough time elapsed for them to fire.
557 void efi_timer_check(void)
560 u64 now = timer_get_us();
562 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
563 if (!efi_events[i].type)
565 if (efi_events[i].is_queued)
566 efi_signal_event(&efi_events[i]);
567 if (!(efi_events[i].type & EVT_TIMER) ||
568 now < efi_events[i].trigger_next)
570 switch (efi_events[i].trigger_type) {
571 case EFI_TIMER_RELATIVE:
572 efi_events[i].trigger_type = EFI_TIMER_STOP;
574 case EFI_TIMER_PERIODIC:
575 efi_events[i].trigger_next +=
576 efi_events[i].trigger_time;
581 efi_events[i].is_signaled = true;
582 efi_signal_event(&efi_events[i]);
588 * Set the trigger time for a timer event or stop the event.
590 * This is the function for internal usage in U-Boot. For the API function
591 * implementing the SetTimer service see efi_set_timer_ext.
593 * @event event for which the timer is set
594 * @type type of the timer
595 * @trigger_time trigger period in multiples of 100ns
596 * @return status code
598 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
599 uint64_t trigger_time)
604 * The parameter defines a multiple of 100ns.
605 * We use multiples of 1000ns. So divide by 10.
607 do_div(trigger_time, 10);
609 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
610 if (event != &efi_events[i])
613 if (!(event->type & EVT_TIMER))
617 event->trigger_next = -1ULL;
619 case EFI_TIMER_PERIODIC:
620 case EFI_TIMER_RELATIVE:
621 event->trigger_next =
622 timer_get_us() + trigger_time;
625 return EFI_INVALID_PARAMETER;
627 event->trigger_type = type;
628 event->trigger_time = trigger_time;
629 event->is_signaled = false;
632 return EFI_INVALID_PARAMETER;
636 * Set the trigger time for a timer event or stop the event.
638 * This function implements the SetTimer service.
639 * See the Unified Extensible Firmware Interface (UEFI) specification
642 * @event event for which the timer is set
643 * @type type of the timer
644 * @trigger_time trigger period in multiples of 100ns
645 * @return status code
647 static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
648 enum efi_timer_delay type,
649 uint64_t trigger_time)
651 EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
652 return EFI_EXIT(efi_set_timer(event, type, trigger_time));
656 * Wait for events to be signaled.
658 * This function implements the WaitForEvent service.
659 * See the Unified Extensible Firmware Interface (UEFI) specification
662 * @num_events number of events to be waited for
663 * @events events to be waited for
664 * @index index of the event that was signaled
665 * @return status code
667 static efi_status_t EFIAPI efi_wait_for_event(efi_uintn_t num_events,
668 struct efi_event **event,
673 EFI_ENTRY("%zd, %p, %p", num_events, event, index);
675 /* Check parameters */
676 if (!num_events || !event)
677 return EFI_EXIT(EFI_INVALID_PARAMETER);
679 if (efi_tpl != TPL_APPLICATION)
680 return EFI_EXIT(EFI_UNSUPPORTED);
681 for (i = 0; i < num_events; ++i) {
682 for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
683 if (event[i] == &efi_events[j])
686 return EFI_EXIT(EFI_INVALID_PARAMETER);
688 if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
689 return EFI_EXIT(EFI_INVALID_PARAMETER);
690 if (!event[i]->is_signaled)
691 efi_signal_event(event[i]);
694 /* Wait for signal */
696 for (i = 0; i < num_events; ++i) {
697 if (event[i]->is_signaled)
700 /* Allow events to occur. */
706 * Reset the signal which is passed to the caller to allow periodic
709 event[i]->is_signaled = false;
713 return EFI_EXIT(EFI_SUCCESS);
717 * Signal an EFI event.
719 * This function implements the SignalEvent service.
720 * See the Unified Extensible Firmware Interface (UEFI) specification
723 * This functions sets the signaled state of the event and queues the
724 * notification function for execution.
726 * @event event to signal
727 * @return status code
729 static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
733 EFI_ENTRY("%p", event);
734 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
735 if (event != &efi_events[i])
737 if (event->is_signaled)
739 event->is_signaled = true;
740 if (event->type & EVT_NOTIFY_SIGNAL)
741 efi_signal_event(event);
744 return EFI_EXIT(EFI_SUCCESS);
748 * Close an EFI event.
750 * This function implements the CloseEvent service.
751 * See the Unified Extensible Firmware Interface (UEFI) specification
754 * @event event to close
755 * @return status code
757 static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
761 EFI_ENTRY("%p", event);
762 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
763 if (event == &efi_events[i]) {
765 event->trigger_next = -1ULL;
766 event->is_queued = false;
767 event->is_signaled = false;
768 return EFI_EXIT(EFI_SUCCESS);
771 return EFI_EXIT(EFI_INVALID_PARAMETER);
775 * Check if an event is signaled.
777 * This function implements the CheckEvent service.
778 * See the Unified Extensible Firmware Interface (UEFI) specification
781 * If an event is not signaled yet the notification function is queued.
783 * @event event to check
784 * @return status code
786 static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
790 EFI_ENTRY("%p", event);
792 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
793 if (event != &efi_events[i])
795 if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
797 if (!event->is_signaled)
798 efi_signal_event(event);
799 if (event->is_signaled)
800 return EFI_EXIT(EFI_SUCCESS);
801 return EFI_EXIT(EFI_NOT_READY);
803 return EFI_EXIT(EFI_INVALID_PARAMETER);
807 * Find the internal EFI object for a handle.
809 * @handle handle to find
812 struct efi_object *efi_search_obj(const void *handle)
814 struct efi_object *efiobj;
816 list_for_each_entry(efiobj, &efi_obj_list, link) {
817 if (efiobj->handle == handle)
825 * Create open protocol info entry and add it to a protocol.
827 * @handler handler of a protocol
828 * @return open protocol info entry
830 static struct efi_open_protocol_info_entry *efi_create_open_info(
831 struct efi_handler *handler)
833 struct efi_open_protocol_info_item *item;
835 item = calloc(1, sizeof(struct efi_open_protocol_info_item));
838 /* Append the item to the open protocol info list. */
839 list_add_tail(&item->link, &handler->open_infos);
845 * Remove an open protocol info entry from a protocol.
847 * @handler handler of a protocol
848 * @return status code
850 static efi_status_t efi_delete_open_info(
851 struct efi_open_protocol_info_item *item)
853 list_del(&item->link);
859 * Install new protocol on a handle.
861 * @handle handle on which the protocol shall be installed
862 * @protocol GUID of the protocol to be installed
863 * @protocol_interface interface of the protocol implementation
864 * @return status code
866 efi_status_t efi_add_protocol(const void *handle, const efi_guid_t *protocol,
867 void *protocol_interface)
869 struct efi_object *efiobj;
870 struct efi_handler *handler;
873 efiobj = efi_search_obj(handle);
875 return EFI_INVALID_PARAMETER;
876 ret = efi_search_protocol(handle, protocol, NULL);
877 if (ret != EFI_NOT_FOUND)
878 return EFI_INVALID_PARAMETER;
879 handler = calloc(1, sizeof(struct efi_handler));
881 return EFI_OUT_OF_RESOURCES;
882 handler->guid = protocol;
883 handler->protocol_interface = protocol_interface;
884 INIT_LIST_HEAD(&handler->open_infos);
885 list_add_tail(&handler->link, &efiobj->protocols);
886 if (!guidcmp(&efi_guid_device_path, protocol))
887 EFI_PRINT("installed device path '%pD'\n", protocol_interface);
892 * Install protocol interface.
894 * This function implements the InstallProtocolInterface service.
895 * See the Unified Extensible Firmware Interface (UEFI) specification
898 * @handle handle on which the protocol shall be installed
899 * @protocol GUID of the protocol to be installed
900 * @protocol_interface_type type of the interface to be installed,
901 * always EFI_NATIVE_INTERFACE
902 * @protocol_interface interface of the protocol implementation
903 * @return status code
905 static efi_status_t EFIAPI efi_install_protocol_interface(
906 void **handle, const efi_guid_t *protocol,
907 int protocol_interface_type, void *protocol_interface)
911 EFI_ENTRY("%p, %pUl, %d, %p", handle, protocol, protocol_interface_type,
914 if (!handle || !protocol ||
915 protocol_interface_type != EFI_NATIVE_INTERFACE) {
916 r = EFI_INVALID_PARAMETER;
920 /* Create new handle if requested. */
922 r = efi_create_handle(handle);
923 if (r != EFI_SUCCESS)
925 debug("%sEFI: new handle %p\n", indent_string(nesting_level),
928 debug("%sEFI: handle %p\n", indent_string(nesting_level),
931 /* Add new protocol */
932 r = efi_add_protocol(*handle, protocol, protocol_interface);
938 * Reinstall protocol interface.
940 * This function implements the ReinstallProtocolInterface service.
941 * See the Unified Extensible Firmware Interface (UEFI) specification
944 * @handle handle on which the protocol shall be
946 * @protocol GUID of the protocol to be installed
947 * @old_interface interface to be removed
948 * @new_interface interface to be installed
949 * @return status code
951 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
952 const efi_guid_t *protocol, void *old_interface,
955 EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface,
957 return EFI_EXIT(EFI_ACCESS_DENIED);
961 * Get all drivers associated to a controller.
962 * The allocated buffer has to be freed with free().
964 * @efiobj handle of the controller
965 * @protocol protocol guid (optional)
966 * @number_of_drivers number of child controllers
967 * @driver_handle_buffer handles of the the drivers
968 * @return status code
970 static efi_status_t efi_get_drivers(struct efi_object *efiobj,
971 const efi_guid_t *protocol,
972 efi_uintn_t *number_of_drivers,
973 efi_handle_t **driver_handle_buffer)
975 struct efi_handler *handler;
976 struct efi_open_protocol_info_item *item;
977 efi_uintn_t count = 0, i;
980 /* Count all driver associations */
981 list_for_each_entry(handler, &efiobj->protocols, link) {
982 if (protocol && guidcmp(handler->guid, protocol))
984 list_for_each_entry(item, &handler->open_infos, link) {
985 if (item->info.attributes &
986 EFI_OPEN_PROTOCOL_BY_DRIVER)
991 * Create buffer. In case of duplicate driver assignments the buffer
992 * will be too large. But that does not harm.
994 *number_of_drivers = 0;
995 *driver_handle_buffer = calloc(count, sizeof(efi_handle_t));
996 if (!*driver_handle_buffer)
997 return EFI_OUT_OF_RESOURCES;
998 /* Collect unique driver handles */
999 list_for_each_entry(handler, &efiobj->protocols, link) {
1000 if (protocol && guidcmp(handler->guid, protocol))
1002 list_for_each_entry(item, &handler->open_infos, link) {
1003 if (item->info.attributes &
1004 EFI_OPEN_PROTOCOL_BY_DRIVER) {
1005 /* Check this is a new driver */
1007 for (i = 0; i < *number_of_drivers; ++i) {
1008 if ((*driver_handle_buffer)[i] ==
1009 item->info.agent_handle)
1012 /* Copy handle to buffer */
1014 i = (*number_of_drivers)++;
1015 (*driver_handle_buffer)[i] =
1016 item->info.agent_handle;
1025 * Disconnect all drivers from a controller.
1027 * This function implements the DisconnectController service.
1028 * See the Unified Extensible Firmware Interface (UEFI) specification
1031 * @efiobj handle of the controller
1032 * @protocol protocol guid (optional)
1033 * @child_handle handle of the child to destroy
1034 * @return status code
1036 static efi_status_t efi_disconnect_all_drivers(
1037 struct efi_object *efiobj,
1038 const efi_guid_t *protocol,
1039 efi_handle_t child_handle)
1041 efi_uintn_t number_of_drivers;
1042 efi_handle_t *driver_handle_buffer;
1043 efi_status_t r, ret;
1045 ret = efi_get_drivers(efiobj, protocol, &number_of_drivers,
1046 &driver_handle_buffer);
1047 if (ret != EFI_SUCCESS)
1050 ret = EFI_NOT_FOUND;
1051 while (number_of_drivers) {
1052 r = EFI_CALL(efi_disconnect_controller(
1054 driver_handle_buffer[--number_of_drivers],
1056 if (r == EFI_SUCCESS)
1059 free(driver_handle_buffer);
1064 * Uninstall protocol interface.
1066 * This function implements the UninstallProtocolInterface service.
1067 * See the Unified Extensible Firmware Interface (UEFI) specification
1070 * @handle handle from which the protocol shall be removed
1071 * @protocol GUID of the protocol to be removed
1072 * @protocol_interface interface to be removed
1073 * @return status code
1075 static efi_status_t EFIAPI efi_uninstall_protocol_interface(
1076 void *handle, const efi_guid_t *protocol,
1077 void *protocol_interface)
1079 struct efi_handler *handler;
1082 EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
1084 if (!handle || !protocol) {
1085 r = EFI_INVALID_PARAMETER;
1089 /* Find the protocol on the handle */
1090 r = efi_search_protocol(handle, protocol, &handler);
1091 if (r != EFI_SUCCESS)
1093 if (handler->protocol_interface) {
1094 /* TODO disconnect controllers */
1095 r = EFI_ACCESS_DENIED;
1097 r = efi_remove_protocol(handle, protocol, protocol_interface);
1104 * Register an event for notification when a protocol is installed.
1106 * This function implements the RegisterProtocolNotify service.
1107 * See the Unified Extensible Firmware Interface (UEFI) specification
1110 * @protocol GUID of the protocol whose installation shall be
1112 * @event event to be signaled upon installation of the protocol
1113 * @registration key for retrieving the registration information
1114 * @return status code
1116 static efi_status_t EFIAPI efi_register_protocol_notify(
1117 const efi_guid_t *protocol,
1118 struct efi_event *event,
1119 void **registration)
1121 EFI_ENTRY("%pUl, %p, %p", protocol, event, registration);
1122 return EFI_EXIT(EFI_OUT_OF_RESOURCES);
1126 * Determine if an EFI handle implements a protocol.
1128 * See the documentation of the LocateHandle service in the UEFI specification.
1130 * @search_type selection criterion
1131 * @protocol GUID of the protocol
1132 * @search_key registration key
1134 * @return 0 if the handle implements the protocol
1136 static int efi_search(enum efi_locate_search_type search_type,
1137 const efi_guid_t *protocol, void *search_key,
1138 struct efi_object *efiobj)
1142 switch (search_type) {
1145 case BY_REGISTER_NOTIFY:
1146 /* TODO: RegisterProtocolNotify is not implemented yet */
1149 ret = efi_search_protocol(efiobj->handle, protocol, NULL);
1150 return (ret != EFI_SUCCESS);
1152 /* Invalid search type */
1158 * Locate handles implementing a protocol.
1160 * This function is meant for U-Boot internal calls. For the API implementation
1161 * of the LocateHandle service see efi_locate_handle_ext.
1163 * @search_type selection criterion
1164 * @protocol GUID of the protocol
1165 * @search_key registration key
1166 * @buffer_size size of the buffer to receive the handles in bytes
1167 * @buffer buffer to receive the relevant handles
1168 * @return status code
1170 static efi_status_t efi_locate_handle(
1171 enum efi_locate_search_type search_type,
1172 const efi_guid_t *protocol, void *search_key,
1173 efi_uintn_t *buffer_size, efi_handle_t *buffer)
1175 struct efi_object *efiobj;
1176 efi_uintn_t size = 0;
1178 /* Check parameters */
1179 switch (search_type) {
1182 case BY_REGISTER_NOTIFY:
1184 return EFI_INVALID_PARAMETER;
1185 /* RegisterProtocolNotify is not implemented yet */
1186 return EFI_UNSUPPORTED;
1189 return EFI_INVALID_PARAMETER;
1192 return EFI_INVALID_PARAMETER;
1196 * efi_locate_handle_buffer uses this function for
1197 * the calculation of the necessary buffer size.
1198 * So do not require a buffer for buffersize == 0.
1200 if (!buffer_size || (*buffer_size && !buffer))
1201 return EFI_INVALID_PARAMETER;
1203 /* Count how much space we need */
1204 list_for_each_entry(efiobj, &efi_obj_list, link) {
1205 if (!efi_search(search_type, protocol, search_key, efiobj))
1206 size += sizeof(void*);
1209 if (*buffer_size < size) {
1210 *buffer_size = size;
1211 return EFI_BUFFER_TOO_SMALL;
1214 *buffer_size = size;
1216 return EFI_NOT_FOUND;
1218 /* Then fill the array */
1219 list_for_each_entry(efiobj, &efi_obj_list, link) {
1220 if (!efi_search(search_type, protocol, search_key, efiobj))
1221 *buffer++ = efiobj->handle;
1228 * Locate handles implementing a protocol.
1230 * This function implements the LocateHandle service.
1231 * See the Unified Extensible Firmware Interface (UEFI) specification
1234 * @search_type selection criterion
1235 * @protocol GUID of the protocol
1236 * @search_key registration key
1237 * @buffer_size size of the buffer to receive the handles in bytes
1238 * @buffer buffer to receive the relevant handles
1239 * @return 0 if the handle implements the protocol
1241 static efi_status_t EFIAPI efi_locate_handle_ext(
1242 enum efi_locate_search_type search_type,
1243 const efi_guid_t *protocol, void *search_key,
1244 efi_uintn_t *buffer_size, efi_handle_t *buffer)
1246 EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key,
1247 buffer_size, buffer);
1249 return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
1250 buffer_size, buffer));
1253 /* Collapses configuration table entries, removing index i */
1254 static void efi_remove_configuration_table(int i)
1256 struct efi_configuration_table *this = &efi_conf_table[i];
1257 struct efi_configuration_table *next = &efi_conf_table[i+1];
1258 struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
1260 memmove(this, next, (ulong)end - (ulong)next);
1265 * Adds, updates, or removes a configuration table.
1267 * This function is used for internal calls. For the API implementation of the
1268 * InstallConfigurationTable service see efi_install_configuration_table_ext.
1270 * @guid GUID of the installed table
1271 * @table table to be installed
1272 * @return status code
1274 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
1278 /* Check for guid override */
1279 for (i = 0; i < systab.nr_tables; i++) {
1280 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
1282 efi_conf_table[i].table = table;
1284 efi_remove_configuration_table(i);
1290 return EFI_NOT_FOUND;
1292 /* No override, check for overflow */
1293 if (i >= ARRAY_SIZE(efi_conf_table))
1294 return EFI_OUT_OF_RESOURCES;
1296 /* Add a new entry */
1297 memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
1298 efi_conf_table[i].table = table;
1299 systab.nr_tables = i + 1;
1305 * Adds, updates, or removes a configuration table.
1307 * This function implements the InstallConfigurationTable service.
1308 * See the Unified Extensible Firmware Interface (UEFI) specification
1311 * @guid GUID of the installed table
1312 * @table table to be installed
1313 * @return status code
1315 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
1318 EFI_ENTRY("%pUl, %p", guid, table);
1319 return EFI_EXIT(efi_install_configuration_table(guid, table));
1323 * Initialize a loaded_image_info + loaded_image_info object with correct
1324 * protocols, boot-device, etc.
1326 * @info loaded image info to be passed to the entry point of the
1328 * @obj internal object associated with the loaded image
1329 * @device_path device path of the loaded image
1330 * @file_path file path of the loaded image
1331 * @return status code
1333 efi_status_t efi_setup_loaded_image(
1334 struct efi_loaded_image *info, struct efi_object *obj,
1335 struct efi_device_path *device_path,
1336 struct efi_device_path *file_path)
1340 /* Add internal object to object list */
1341 efi_add_handle(obj);
1342 /* efi_exit() assumes that the handle points to the info */
1345 info->file_path = file_path;
1347 info->device_handle = efi_dp_find_obj(device_path, NULL);
1350 * When asking for the device path interface, return
1351 * bootefi_device_path
1353 ret = efi_add_protocol(obj->handle, &efi_guid_device_path, device_path);
1354 if (ret != EFI_SUCCESS)
1358 * When asking for the loaded_image interface, just
1359 * return handle which points to loaded_image_info
1361 ret = efi_add_protocol(obj->handle, &efi_guid_loaded_image, info);
1362 if (ret != EFI_SUCCESS)
1365 ret = efi_add_protocol(obj->handle, &efi_guid_console_control,
1366 (void *)&efi_console_control);
1367 if (ret != EFI_SUCCESS)
1370 ret = efi_add_protocol(obj->handle,
1371 &efi_guid_device_path_to_text_protocol,
1372 (void *)&efi_device_path_to_text);
1373 if (ret != EFI_SUCCESS)
1378 printf("ERROR: Failure to install protocols for loaded image\n");
1383 * Load an image using a file path.
1385 * @file_path the path of the image to load
1386 * @buffer buffer containing the loaded image
1387 * @return status code
1389 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
1392 struct efi_file_info *info = NULL;
1393 struct efi_file_handle *f;
1394 static efi_status_t ret;
1397 f = efi_file_from_path(file_path);
1399 return EFI_DEVICE_ERROR;
1402 EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
1404 if (ret == EFI_BUFFER_TOO_SMALL) {
1406 EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
1409 if (ret != EFI_SUCCESS)
1412 ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer);
1416 EFI_CALL(ret = f->read(f, &info->file_size, *buffer));
1420 EFI_CALL(f->close(f));
1422 if (ret != EFI_SUCCESS) {
1423 efi_free_pool(*buffer);
1431 * Load an EFI image into memory.
1433 * This function implements the LoadImage service.
1434 * See the Unified Extensible Firmware Interface (UEFI) specification
1437 * @boot_policy true for request originating from the boot manager
1438 * @parent_image the calles's image handle
1439 * @file_path the path of the image to load
1440 * @source_buffer memory location from which the image is installed
1441 * @source_size size of the memory area from which the image is
1443 * @image_handle handle for the newly installed image
1444 * @return status code
1446 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
1447 efi_handle_t parent_image,
1448 struct efi_device_path *file_path,
1449 void *source_buffer,
1450 unsigned long source_size,
1451 efi_handle_t *image_handle)
1453 struct efi_loaded_image *info;
1454 struct efi_object *obj;
1457 EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
1458 file_path, source_buffer, source_size, image_handle);
1460 info = calloc(1, sizeof(*info));
1461 obj = calloc(1, sizeof(*obj));
1463 if (!source_buffer) {
1464 struct efi_device_path *dp, *fp;
1466 ret = efi_load_image_from_path(file_path, &source_buffer);
1467 if (ret != EFI_SUCCESS)
1470 * split file_path which contains both the device and
1473 efi_dp_split_file_path(file_path, &dp, &fp);
1474 ret = efi_setup_loaded_image(info, obj, dp, fp);
1475 if (ret != EFI_SUCCESS)
1478 /* In this case, file_path is the "device" path, ie.
1479 * something like a HARDWARE_DEVICE:MEMORY_MAPPED
1481 ret = efi_setup_loaded_image(info, obj, file_path, NULL);
1482 if (ret != EFI_SUCCESS)
1485 info->reserved = efi_load_pe(source_buffer, info);
1486 if (!info->reserved) {
1487 ret = EFI_UNSUPPORTED;
1490 info->system_table = &systab;
1491 info->parent_handle = parent_image;
1492 *image_handle = obj->handle;
1493 return EFI_EXIT(EFI_SUCCESS);
1496 efi_delete_handle(obj);
1497 return EFI_EXIT(ret);
1501 * Call the entry point of an image.
1503 * This function implements the StartImage service.
1504 * See the Unified Extensible Firmware Interface (UEFI) specification
1507 * @image_handle handle of the image
1508 * @exit_data_size size of the buffer
1509 * @exit_data buffer to receive the exit data of the called image
1510 * @return status code
1512 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
1513 unsigned long *exit_data_size,
1516 ulong (*entry)(void *image_handle, struct efi_system_table *st);
1517 struct efi_loaded_image *info = image_handle;
1520 EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
1521 entry = info->reserved;
1523 efi_is_direct_boot = false;
1525 /* call the image! */
1526 if (setjmp(&info->exit_jmp)) {
1528 * We called the entry point of the child image with EFI_CALL
1529 * in the lines below. The child image called the Exit() boot
1530 * service efi_exit() which executed the long jump that brought
1531 * us to the current line. This implies that the second half
1532 * of the EFI_CALL macro has not been executed.
1536 * efi_exit() called efi_restore_gd(). We have to undo this
1537 * otherwise __efi_entry_check() will put the wrong value into
1543 * To get ready to call EFI_EXIT below we have to execute the
1544 * missed out steps of EFI_CALL.
1546 assert(__efi_entry_check());
1547 debug("%sEFI: %lu returned by started image\n",
1548 __efi_nesting_dec(),
1549 (unsigned long)((uintptr_t)info->exit_status &
1551 return EFI_EXIT(info->exit_status);
1554 ret = EFI_CALL(entry(image_handle, &systab));
1556 /* Should usually never get here */
1557 return EFI_EXIT(ret);
1561 * Leave an EFI application or driver.
1563 * This function implements the Exit service.
1564 * See the Unified Extensible Firmware Interface (UEFI) specification
1567 * @image_handle handle of the application or driver that is exiting
1568 * @exit_status status code
1569 * @exit_data_size size of the buffer in bytes
1570 * @exit_data buffer with data describing an error
1571 * @return status code
1573 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
1574 efi_status_t exit_status, unsigned long exit_data_size,
1578 * We require that the handle points to the original loaded
1579 * image protocol interface.
1581 * For getting the longjmp address this is safer than locating
1582 * the protocol because the protocol may have been reinstalled
1583 * pointing to another memory location.
1585 * TODO: We should call the unload procedure of the loaded
1588 struct efi_loaded_image *loaded_image_info = (void*)image_handle;
1590 EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
1591 exit_data_size, exit_data);
1593 /* Make sure entry/exit counts for EFI world cross-overs match */
1594 EFI_EXIT(exit_status);
1597 * But longjmp out with the U-Boot gd, not the application's, as
1598 * the other end is a setjmp call inside EFI context.
1602 loaded_image_info->exit_status = exit_status;
1603 longjmp(&loaded_image_info->exit_jmp, 1);
1605 panic("EFI application exited");
1609 * Unload an EFI image.
1611 * This function implements the UnloadImage service.
1612 * See the Unified Extensible Firmware Interface (UEFI) specification
1615 * @image_handle handle of the image to be unloaded
1616 * @return status code
1618 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
1620 struct efi_object *efiobj;
1622 EFI_ENTRY("%p", image_handle);
1623 efiobj = efi_search_obj(image_handle);
1625 list_del(&efiobj->link);
1627 return EFI_EXIT(EFI_SUCCESS);
1631 * Fix up caches for EFI payloads if necessary.
1633 static void efi_exit_caches(void)
1635 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
1637 * Grub on 32bit ARM needs to have caches disabled before jumping into
1638 * a zImage, but does not know of all cache layers. Give it a hand.
1640 if (efi_is_direct_boot)
1641 cleanup_before_linux();
1646 * Stop boot services.
1648 * This function implements the ExitBootServices service.
1649 * See the Unified Extensible Firmware Interface (UEFI) specification
1652 * @image_handle handle of the loaded image
1653 * @map_key key of the memory map
1654 * @return status code
1656 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
1657 unsigned long map_key)
1661 EFI_ENTRY("%p, %ld", image_handle, map_key);
1663 /* Notify that ExitBootServices is invoked. */
1664 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
1665 if (efi_events[i].type != EVT_SIGNAL_EXIT_BOOT_SERVICES)
1667 efi_signal_event(&efi_events[i]);
1669 /* Make sure that notification functions are not called anymore */
1670 efi_tpl = TPL_HIGH_LEVEL;
1672 /* XXX Should persist EFI variables here */
1674 board_quiesce_devices();
1676 /* Fix up caches for EFI payloads if necessary */
1679 /* This stops all lingering devices */
1680 bootm_disable_interrupts();
1682 /* Give the payload some time to boot */
1683 efi_set_watchdog(0);
1686 return EFI_EXIT(EFI_SUCCESS);
1690 * Get next value of the counter.
1692 * This function implements the NextMonotonicCount service.
1693 * See the Unified Extensible Firmware Interface (UEFI) specification
1696 * @count returned value of the counter
1697 * @return status code
1699 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
1701 static uint64_t mono = 0;
1702 EFI_ENTRY("%p", count);
1704 return EFI_EXIT(EFI_SUCCESS);
1710 * This function implements the Stall sercive.
1711 * See the Unified Extensible Firmware Interface (UEFI) specification
1714 * @microseconds period to sleep in microseconds
1715 * @return status code
1717 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
1719 EFI_ENTRY("%ld", microseconds);
1720 udelay(microseconds);
1721 return EFI_EXIT(EFI_SUCCESS);
1725 * Reset the watchdog timer.
1727 * This function implements the SetWatchdogTimer service.
1728 * See the Unified Extensible Firmware Interface (UEFI) specification
1731 * @timeout seconds before reset by watchdog
1732 * @watchdog_code code to be logged when resetting
1733 * @data_size size of buffer in bytes
1734 * @watchdog_data buffer with data describing the reset reason
1735 * @return status code
1737 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
1738 uint64_t watchdog_code,
1739 unsigned long data_size,
1740 uint16_t *watchdog_data)
1742 EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
1743 data_size, watchdog_data);
1744 return EFI_EXIT(efi_set_watchdog(timeout));
1750 * This function implements the CloseProtocol service.
1751 * See the Unified Extensible Firmware Interface (UEFI) specification
1754 * @handle handle on which the protocol shall be closed
1755 * @protocol GUID of the protocol to close
1756 * @agent_handle handle of the driver
1757 * @controller_handle handle of the controller
1758 * @return status code
1760 static efi_status_t EFIAPI efi_close_protocol(void *handle,
1761 const efi_guid_t *protocol,
1763 void *controller_handle)
1765 struct efi_handler *handler;
1766 struct efi_open_protocol_info_item *item;
1767 struct efi_open_protocol_info_item *pos;
1770 EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle,
1773 if (!agent_handle) {
1774 r = EFI_INVALID_PARAMETER;
1777 r = efi_search_protocol(handle, protocol, &handler);
1778 if (r != EFI_SUCCESS)
1782 list_for_each_entry_safe(item, pos, &handler->open_infos, link) {
1783 if (item->info.agent_handle == agent_handle &&
1784 item->info.controller_handle == controller_handle) {
1785 efi_delete_open_info(item);
1795 * Provide information about then open status of a protocol on a handle
1797 * This function implements the OpenProtocolInformation service.
1798 * See the Unified Extensible Firmware Interface (UEFI) specification
1801 * @handle handle for which the information shall be retrieved
1802 * @protocol GUID of the protocol
1803 * @entry_buffer buffer to receive the open protocol information
1804 * @entry_count number of entries available in the buffer
1805 * @return status code
1807 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
1808 const efi_guid_t *protocol,
1809 struct efi_open_protocol_info_entry **entry_buffer,
1810 efi_uintn_t *entry_count)
1812 unsigned long buffer_size;
1813 unsigned long count;
1814 struct efi_handler *handler;
1815 struct efi_open_protocol_info_item *item;
1818 EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer,
1821 /* Check parameters */
1822 if (!entry_buffer) {
1823 r = EFI_INVALID_PARAMETER;
1826 r = efi_search_protocol(handle, protocol, &handler);
1827 if (r != EFI_SUCCESS)
1832 list_for_each_entry(item, &handler->open_infos, link) {
1833 if (item->info.open_count)
1836 *entry_count = count;
1837 *entry_buffer = NULL;
1844 buffer_size = count * sizeof(struct efi_open_protocol_info_entry);
1845 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1846 (void **)entry_buffer);
1847 if (r != EFI_SUCCESS)
1849 list_for_each_entry_reverse(item, &handler->open_infos, link) {
1850 if (item->info.open_count)
1851 (*entry_buffer)[--count] = item->info;
1858 * Get protocols installed on a handle.
1860 * This function implements the ProtocolsPerHandleService.
1861 * See the Unified Extensible Firmware Interface (UEFI) specification
1864 * @handle handle for which the information is retrieved
1865 * @protocol_buffer buffer with protocol GUIDs
1866 * @protocol_buffer_count number of entries in the buffer
1867 * @return status code
1869 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
1870 efi_guid_t ***protocol_buffer,
1871 efi_uintn_t *protocol_buffer_count)
1873 unsigned long buffer_size;
1874 struct efi_object *efiobj;
1875 struct list_head *protocol_handle;
1878 EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
1879 protocol_buffer_count);
1881 if (!handle || !protocol_buffer || !protocol_buffer_count)
1882 return EFI_EXIT(EFI_INVALID_PARAMETER);
1884 *protocol_buffer = NULL;
1885 *protocol_buffer_count = 0;
1887 efiobj = efi_search_obj(handle);
1889 return EFI_EXIT(EFI_INVALID_PARAMETER);
1891 /* Count protocols */
1892 list_for_each(protocol_handle, &efiobj->protocols) {
1893 ++*protocol_buffer_count;
1897 if (*protocol_buffer_count) {
1900 buffer_size = sizeof(efi_guid_t *) * *protocol_buffer_count;
1901 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1902 (void **)protocol_buffer);
1903 if (r != EFI_SUCCESS)
1905 list_for_each(protocol_handle, &efiobj->protocols) {
1906 struct efi_handler *protocol;
1908 protocol = list_entry(protocol_handle,
1909 struct efi_handler, link);
1910 (*protocol_buffer)[j] = (void *)protocol->guid;
1915 return EFI_EXIT(EFI_SUCCESS);
1919 * Locate handles implementing a protocol.
1921 * This function implements the LocateHandleBuffer service.
1922 * See the Unified Extensible Firmware Interface (UEFI) specification
1925 * @search_type selection criterion
1926 * @protocol GUID of the protocol
1927 * @search_key registration key
1928 * @no_handles number of returned handles
1929 * @buffer buffer with the returned handles
1930 * @return status code
1932 static efi_status_t EFIAPI efi_locate_handle_buffer(
1933 enum efi_locate_search_type search_type,
1934 const efi_guid_t *protocol, void *search_key,
1935 efi_uintn_t *no_handles, efi_handle_t **buffer)
1938 efi_uintn_t buffer_size = 0;
1940 EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key,
1941 no_handles, buffer);
1943 if (!no_handles || !buffer) {
1944 r = EFI_INVALID_PARAMETER;
1949 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1951 if (r != EFI_BUFFER_TOO_SMALL)
1953 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1955 if (r != EFI_SUCCESS)
1957 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1959 if (r == EFI_SUCCESS)
1960 *no_handles = buffer_size / sizeof(void *);
1966 * Find an interface implementing a protocol.
1968 * This function implements the LocateProtocol service.
1969 * See the Unified Extensible Firmware Interface (UEFI) specification
1972 * @protocol GUID of the protocol
1973 * @registration registration key passed to the notification function
1974 * @protocol_interface interface implementing the protocol
1975 * @return status code
1977 static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol,
1979 void **protocol_interface)
1981 struct list_head *lhandle;
1984 EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface);
1986 if (!protocol || !protocol_interface)
1987 return EFI_EXIT(EFI_INVALID_PARAMETER);
1989 list_for_each(lhandle, &efi_obj_list) {
1990 struct efi_object *efiobj;
1991 struct efi_handler *handler;
1993 efiobj = list_entry(lhandle, struct efi_object, link);
1995 ret = efi_search_protocol(efiobj->handle, protocol, &handler);
1996 if (ret == EFI_SUCCESS) {
1997 *protocol_interface = handler->protocol_interface;
1998 return EFI_EXIT(EFI_SUCCESS);
2001 *protocol_interface = NULL;
2003 return EFI_EXIT(EFI_NOT_FOUND);
2007 * Get the device path and handle of an device implementing a protocol.
2009 * This function implements the LocateDevicePath service.
2010 * See the Unified Extensible Firmware Interface (UEFI) specification
2013 * @protocol GUID of the protocol
2014 * @device_path device path
2015 * @device handle of the device
2016 * @return status code
2018 static efi_status_t EFIAPI efi_locate_device_path(
2019 const efi_guid_t *protocol,
2020 struct efi_device_path **device_path,
2021 efi_handle_t *device)
2023 struct efi_device_path *dp;
2025 struct efi_handler *handler;
2026 efi_handle_t *handles;
2028 size_t len_best = 0;
2029 efi_uintn_t no_handles;
2033 EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
2035 if (!protocol || !device_path || !*device_path || !device) {
2036 ret = EFI_INVALID_PARAMETER;
2040 /* Find end of device path */
2041 len = efi_dp_size(*device_path);
2043 /* Get all handles implementing the protocol */
2044 ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL,
2045 &no_handles, &handles));
2046 if (ret != EFI_SUCCESS)
2049 for (i = 0; i < no_handles; ++i) {
2050 /* Find the device path protocol */
2051 ret = efi_search_protocol(handles[i], &efi_guid_device_path,
2053 if (ret != EFI_SUCCESS)
2055 dp = (struct efi_device_path *)handler->protocol_interface;
2056 len_dp = efi_dp_size(dp);
2058 * This handle can only be a better fit
2059 * if its device path length is longer than the best fit and
2060 * if its device path length is shorter of equal the searched
2063 if (len_dp <= len_best || len_dp > len)
2065 /* Check if dp is a subpath of device_path */
2066 if (memcmp(*device_path, dp, len_dp))
2068 *device = handles[i];
2072 remainder = (u8 *)*device_path + len_best;
2073 *device_path = (struct efi_device_path *)remainder;
2076 ret = EFI_NOT_FOUND;
2079 return EFI_EXIT(ret);
2083 * Install multiple protocol interfaces.
2085 * This function implements the MultipleProtocolInterfaces service.
2086 * See the Unified Extensible Firmware Interface (UEFI) specification
2089 * @handle handle on which the protocol interfaces shall be installed
2090 * @... NULL terminated argument list with pairs of protocol GUIDS and
2092 * @return status code
2094 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
2097 EFI_ENTRY("%p", handle);
2100 const efi_guid_t *protocol;
2101 void *protocol_interface;
2102 efi_status_t r = EFI_SUCCESS;
2106 return EFI_EXIT(EFI_INVALID_PARAMETER);
2108 va_start(argptr, handle);
2110 protocol = va_arg(argptr, efi_guid_t*);
2113 protocol_interface = va_arg(argptr, void*);
2114 r = EFI_CALL(efi_install_protocol_interface(
2116 EFI_NATIVE_INTERFACE,
2117 protocol_interface));
2118 if (r != EFI_SUCCESS)
2123 if (r == EFI_SUCCESS)
2126 /* If an error occurred undo all changes. */
2127 va_start(argptr, handle);
2129 protocol = va_arg(argptr, efi_guid_t*);
2130 protocol_interface = va_arg(argptr, void*);
2131 EFI_CALL(efi_uninstall_protocol_interface(handle, protocol,
2132 protocol_interface));
2140 * Uninstall multiple protocol interfaces.
2142 * This function implements the UninstallMultipleProtocolInterfaces service.
2143 * See the Unified Extensible Firmware Interface (UEFI) specification
2146 * @handle handle from which the protocol interfaces shall be removed
2147 * @... NULL terminated argument list with pairs of protocol GUIDS and
2149 * @return status code
2151 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
2154 EFI_ENTRY("%p", handle);
2157 const efi_guid_t *protocol;
2158 void *protocol_interface;
2159 efi_status_t r = EFI_SUCCESS;
2163 return EFI_EXIT(EFI_INVALID_PARAMETER);
2165 va_start(argptr, handle);
2167 protocol = va_arg(argptr, efi_guid_t*);
2170 protocol_interface = va_arg(argptr, void*);
2171 r = EFI_CALL(efi_uninstall_protocol_interface(
2173 protocol_interface));
2174 if (r != EFI_SUCCESS)
2179 if (r == EFI_SUCCESS)
2182 /* If an error occurred undo all changes. */
2183 va_start(argptr, handle);
2185 protocol = va_arg(argptr, efi_guid_t*);
2186 protocol_interface = va_arg(argptr, void*);
2187 EFI_CALL(efi_install_protocol_interface(&handle, protocol,
2188 EFI_NATIVE_INTERFACE,
2189 protocol_interface));
2197 * Calculate cyclic redundancy code.
2199 * This function implements the CalculateCrc32 service.
2200 * See the Unified Extensible Firmware Interface (UEFI) specification
2203 * @data buffer with data
2204 * @data_size size of buffer in bytes
2205 * @crc32_p cyclic redundancy code
2206 * @return status code
2208 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
2209 unsigned long data_size,
2212 EFI_ENTRY("%p, %ld", data, data_size);
2213 *crc32_p = crc32(0, data, data_size);
2214 return EFI_EXIT(EFI_SUCCESS);
2220 * This function implements the CopyMem service.
2221 * See the Unified Extensible Firmware Interface (UEFI) specification
2224 * @destination destination of the copy operation
2225 * @source source of the copy operation
2226 * @length number of bytes to copy
2228 static void EFIAPI efi_copy_mem(void *destination, const void *source,
2231 EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length);
2232 memcpy(destination, source, length);
2233 EFI_EXIT(EFI_SUCCESS);
2237 * Fill memory with a byte value.
2239 * This function implements the SetMem service.
2240 * See the Unified Extensible Firmware Interface (UEFI) specification
2243 * @buffer buffer to fill
2244 * @size size of buffer in bytes
2245 * @value byte to copy to the buffer
2247 static void EFIAPI efi_set_mem(void *buffer, size_t size, uint8_t value)
2249 EFI_ENTRY("%p, %ld, 0x%x", buffer, (unsigned long)size, value);
2250 memset(buffer, value, size);
2251 EFI_EXIT(EFI_SUCCESS);
2255 * Open protocol interface on a handle.
2257 * @handler handler of a protocol
2258 * @protocol_interface interface implementing the protocol
2259 * @agent_handle handle of the driver
2260 * @controller_handle handle of the controller
2261 * @attributes attributes indicating how to open the protocol
2262 * @return status code
2264 static efi_status_t efi_protocol_open(
2265 struct efi_handler *handler,
2266 void **protocol_interface, void *agent_handle,
2267 void *controller_handle, uint32_t attributes)
2269 struct efi_open_protocol_info_item *item;
2270 struct efi_open_protocol_info_entry *match = NULL;
2271 bool opened_by_driver = false;
2272 bool opened_exclusive = false;
2274 /* If there is no agent, only return the interface */
2278 /* For TEST_PROTOCOL ignore interface attribute */
2279 if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
2280 *protocol_interface = NULL;
2283 * Check if the protocol is already opened by a driver with the same
2284 * attributes or opened exclusively
2286 list_for_each_entry(item, &handler->open_infos, link) {
2287 if (item->info.agent_handle == agent_handle) {
2288 if ((attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) &&
2289 (item->info.attributes == attributes))
2290 return EFI_ALREADY_STARTED;
2292 if (item->info.attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE)
2293 opened_exclusive = true;
2296 /* Only one controller can open the protocol exclusively */
2297 if (opened_exclusive && attributes &
2298 (EFI_OPEN_PROTOCOL_EXCLUSIVE | EFI_OPEN_PROTOCOL_BY_DRIVER))
2299 return EFI_ACCESS_DENIED;
2301 /* Prepare exclusive opening */
2302 if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) {
2303 /* Try to disconnect controllers */
2304 list_for_each_entry(item, &handler->open_infos, link) {
2305 if (item->info.attributes ==
2306 EFI_OPEN_PROTOCOL_BY_DRIVER)
2307 EFI_CALL(efi_disconnect_controller(
2308 item->info.controller_handle,
2309 item->info.agent_handle,
2312 opened_by_driver = false;
2313 /* Check if all controllers are disconnected */
2314 list_for_each_entry(item, &handler->open_infos, link) {
2315 if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER)
2316 opened_by_driver = true;
2318 /* Only one controller can be conncected */
2319 if (opened_by_driver)
2320 return EFI_ACCESS_DENIED;
2323 /* Find existing entry */
2324 list_for_each_entry(item, &handler->open_infos, link) {
2325 if (item->info.agent_handle == agent_handle &&
2326 item->info.controller_handle == controller_handle)
2327 match = &item->info;
2329 /* None found, create one */
2331 match = efi_create_open_info(handler);
2333 return EFI_OUT_OF_RESOURCES;
2336 match->agent_handle = agent_handle;
2337 match->controller_handle = controller_handle;
2338 match->attributes = attributes;
2339 match->open_count++;
2342 /* For TEST_PROTOCOL ignore interface attribute. */
2343 if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
2344 *protocol_interface = handler->protocol_interface;
2350 * Open protocol interface on a handle.
2352 * This function implements the OpenProtocol interface.
2353 * See the Unified Extensible Firmware Interface (UEFI) specification
2356 * @handle handle on which the protocol shall be opened
2357 * @protocol GUID of the protocol
2358 * @protocol_interface interface implementing the protocol
2359 * @agent_handle handle of the driver
2360 * @controller_handle handle of the controller
2361 * @attributes attributes indicating how to open the protocol
2362 * @return status code
2364 static efi_status_t EFIAPI efi_open_protocol(
2365 void *handle, const efi_guid_t *protocol,
2366 void **protocol_interface, void *agent_handle,
2367 void *controller_handle, uint32_t attributes)
2369 struct efi_handler *handler;
2370 efi_status_t r = EFI_INVALID_PARAMETER;
2372 EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle, protocol,
2373 protocol_interface, agent_handle, controller_handle,
2376 if (!handle || !protocol ||
2377 (!protocol_interface && attributes !=
2378 EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
2382 switch (attributes) {
2383 case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
2384 case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
2385 case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
2387 case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
2388 if (controller_handle == handle)
2391 case EFI_OPEN_PROTOCOL_BY_DRIVER:
2392 case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
2393 /* Check that the controller handle is valid */
2394 if (!efi_search_obj(controller_handle))
2397 case EFI_OPEN_PROTOCOL_EXCLUSIVE:
2398 /* Check that the agent handle is valid */
2399 if (!efi_search_obj(agent_handle))
2406 r = efi_search_protocol(handle, protocol, &handler);
2407 if (r != EFI_SUCCESS)
2410 r = efi_protocol_open(handler, protocol_interface, agent_handle,
2411 controller_handle, attributes);
2417 * Get interface of a protocol on a handle.
2419 * This function implements the HandleProtocol service.
2420 * See the Unified Extensible Firmware Interface (UEFI) specification
2423 * @handle handle on which the protocol shall be opened
2424 * @protocol GUID of the protocol
2425 * @protocol_interface interface implementing the protocol
2426 * @return status code
2428 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
2429 const efi_guid_t *protocol,
2430 void **protocol_interface)
2432 return efi_open_protocol(handle, protocol, protocol_interface, NULL,
2433 NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
2436 static efi_status_t efi_bind_controller(
2437 efi_handle_t controller_handle,
2438 efi_handle_t driver_image_handle,
2439 struct efi_device_path *remain_device_path)
2441 struct efi_driver_binding_protocol *binding_protocol;
2444 r = EFI_CALL(efi_open_protocol(driver_image_handle,
2445 &efi_guid_driver_binding_protocol,
2446 (void **)&binding_protocol,
2447 driver_image_handle, NULL,
2448 EFI_OPEN_PROTOCOL_GET_PROTOCOL));
2449 if (r != EFI_SUCCESS)
2451 r = EFI_CALL(binding_protocol->supported(binding_protocol,
2453 remain_device_path));
2454 if (r == EFI_SUCCESS)
2455 r = EFI_CALL(binding_protocol->start(binding_protocol,
2457 remain_device_path));
2458 EFI_CALL(efi_close_protocol(driver_image_handle,
2459 &efi_guid_driver_binding_protocol,
2460 driver_image_handle, NULL));
2464 static efi_status_t efi_connect_single_controller(
2465 efi_handle_t controller_handle,
2466 efi_handle_t *driver_image_handle,
2467 struct efi_device_path *remain_device_path)
2469 efi_handle_t *buffer;
2473 size_t connected = 0;
2475 /* Get buffer with all handles with driver binding protocol */
2476 r = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL,
2477 &efi_guid_driver_binding_protocol,
2478 NULL, &count, &buffer));
2479 if (r != EFI_SUCCESS)
2482 /* Context Override */
2483 if (driver_image_handle) {
2484 for (; *driver_image_handle; ++driver_image_handle) {
2485 for (i = 0; i < count; ++i) {
2486 if (buffer[i] == *driver_image_handle) {
2488 r = efi_bind_controller(
2490 *driver_image_handle,
2491 remain_device_path);
2493 * For drivers that do not support the
2494 * controller or are already connected
2495 * we receive an error code here.
2497 if (r == EFI_SUCCESS)
2505 * TODO: Some overrides are not yet implemented:
2506 * - Platform Driver Override
2507 * - Driver Family Override Search
2508 * - Bus Specific Driver Override
2511 /* Driver Binding Search */
2512 for (i = 0; i < count; ++i) {
2514 r = efi_bind_controller(controller_handle,
2516 remain_device_path);
2517 if (r == EFI_SUCCESS)
2522 efi_free_pool(buffer);
2524 return EFI_NOT_FOUND;
2529 * Connect a controller to a driver.
2531 * This function implements the ConnectController service.
2532 * See the Unified Extensible Firmware Interface (UEFI) specification
2535 * First all driver binding protocol handles are tried for binding drivers.
2536 * Afterwards all handles that have openened a protocol of the controller
2537 * with EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER are connected to drivers.
2539 * @controller_handle handle of the controller
2540 * @driver_image_handle handle of the driver
2541 * @remain_device_path device path of a child controller
2542 * @recursive true to connect all child controllers
2543 * @return status code
2545 static efi_status_t EFIAPI efi_connect_controller(
2546 efi_handle_t controller_handle,
2547 efi_handle_t *driver_image_handle,
2548 struct efi_device_path *remain_device_path,
2552 efi_status_t ret = EFI_NOT_FOUND;
2553 struct efi_object *efiobj;
2555 EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
2556 remain_device_path, recursive);
2558 efiobj = efi_search_obj(controller_handle);
2560 ret = EFI_INVALID_PARAMETER;
2564 r = efi_connect_single_controller(controller_handle,
2565 driver_image_handle,
2566 remain_device_path);
2567 if (r == EFI_SUCCESS)
2570 struct efi_handler *handler;
2571 struct efi_open_protocol_info_item *item;
2573 list_for_each_entry(handler, &efiobj->protocols, link) {
2574 list_for_each_entry(item, &handler->open_infos, link) {
2575 if (item->info.attributes &
2576 EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {
2577 r = EFI_CALL(efi_connect_controller(
2578 item->info.controller_handle,
2579 driver_image_handle,
2582 if (r == EFI_SUCCESS)
2588 /* Check for child controller specified by end node */
2589 if (ret != EFI_SUCCESS && remain_device_path &&
2590 remain_device_path->type == DEVICE_PATH_TYPE_END)
2593 return EFI_EXIT(ret);
2597 * Get all child controllers associated to a driver.
2598 * The allocated buffer has to be freed with free().
2600 * @efiobj handle of the controller
2601 * @driver_handle handle of the driver
2602 * @number_of_children number of child controllers
2603 * @child_handle_buffer handles of the the child controllers
2605 static efi_status_t efi_get_child_controllers(
2606 struct efi_object *efiobj,
2607 efi_handle_t driver_handle,
2608 efi_uintn_t *number_of_children,
2609 efi_handle_t **child_handle_buffer)
2611 struct efi_handler *handler;
2612 struct efi_open_protocol_info_item *item;
2613 efi_uintn_t count = 0, i;
2616 /* Count all child controller associations */
2617 list_for_each_entry(handler, &efiobj->protocols, link) {
2618 list_for_each_entry(item, &handler->open_infos, link) {
2619 if (item->info.agent_handle == driver_handle &&
2620 item->info.attributes &
2621 EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER)
2626 * Create buffer. In case of duplicate child controller assignments
2627 * the buffer will be too large. But that does not harm.
2629 *number_of_children = 0;
2630 *child_handle_buffer = calloc(count, sizeof(efi_handle_t));
2631 if (!*child_handle_buffer)
2632 return EFI_OUT_OF_RESOURCES;
2633 /* Copy unique child handles */
2634 list_for_each_entry(handler, &efiobj->protocols, link) {
2635 list_for_each_entry(item, &handler->open_infos, link) {
2636 if (item->info.agent_handle == driver_handle &&
2637 item->info.attributes &
2638 EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {
2639 /* Check this is a new child controller */
2641 for (i = 0; i < *number_of_children; ++i) {
2642 if ((*child_handle_buffer)[i] ==
2643 item->info.controller_handle)
2646 /* Copy handle to buffer */
2648 i = (*number_of_children)++;
2649 (*child_handle_buffer)[i] =
2650 item->info.controller_handle;
2659 * Disconnect a controller from a driver.
2661 * This function implements the DisconnectController service.
2662 * See the Unified Extensible Firmware Interface (UEFI) specification
2665 * @controller_handle handle of the controller
2666 * @driver_image_handle handle of the driver
2667 * @child_handle handle of the child to destroy
2668 * @return status code
2670 static efi_status_t EFIAPI efi_disconnect_controller(
2671 efi_handle_t controller_handle,
2672 efi_handle_t driver_image_handle,
2673 efi_handle_t child_handle)
2675 struct efi_driver_binding_protocol *binding_protocol;
2676 efi_handle_t *child_handle_buffer = NULL;
2677 size_t number_of_children = 0;
2679 size_t stop_count = 0;
2680 struct efi_object *efiobj;
2682 EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
2685 efiobj = efi_search_obj(controller_handle);
2687 r = EFI_INVALID_PARAMETER;
2691 if (child_handle && !efi_search_obj(child_handle)) {
2692 r = EFI_INVALID_PARAMETER;
2696 /* If no driver handle is supplied, disconnect all drivers */
2697 if (!driver_image_handle) {
2698 r = efi_disconnect_all_drivers(efiobj, NULL, child_handle);
2702 /* Create list of child handles */
2704 number_of_children = 1;
2705 child_handle_buffer = &child_handle;
2707 efi_get_child_controllers(efiobj,
2708 driver_image_handle,
2709 &number_of_children,
2710 &child_handle_buffer);
2713 /* Get the driver binding protocol */
2714 r = EFI_CALL(efi_open_protocol(driver_image_handle,
2715 &efi_guid_driver_binding_protocol,
2716 (void **)&binding_protocol,
2717 driver_image_handle, NULL,
2718 EFI_OPEN_PROTOCOL_GET_PROTOCOL));
2719 if (r != EFI_SUCCESS)
2721 /* Remove the children */
2722 if (number_of_children) {
2723 r = EFI_CALL(binding_protocol->stop(binding_protocol,
2726 child_handle_buffer));
2727 if (r == EFI_SUCCESS)
2730 /* Remove the driver */
2732 r = EFI_CALL(binding_protocol->stop(binding_protocol,
2735 if (r == EFI_SUCCESS)
2737 EFI_CALL(efi_close_protocol(driver_image_handle,
2738 &efi_guid_driver_binding_protocol,
2739 driver_image_handle, NULL));
2747 free(child_handle_buffer);
2751 static const struct efi_boot_services efi_boot_services = {
2753 .headersize = sizeof(struct efi_table_hdr),
2755 .raise_tpl = efi_raise_tpl,
2756 .restore_tpl = efi_restore_tpl,
2757 .allocate_pages = efi_allocate_pages_ext,
2758 .free_pages = efi_free_pages_ext,
2759 .get_memory_map = efi_get_memory_map_ext,
2760 .allocate_pool = efi_allocate_pool_ext,
2761 .free_pool = efi_free_pool_ext,
2762 .create_event = efi_create_event_ext,
2763 .set_timer = efi_set_timer_ext,
2764 .wait_for_event = efi_wait_for_event,
2765 .signal_event = efi_signal_event_ext,
2766 .close_event = efi_close_event,
2767 .check_event = efi_check_event,
2768 .install_protocol_interface = efi_install_protocol_interface,
2769 .reinstall_protocol_interface = efi_reinstall_protocol_interface,
2770 .uninstall_protocol_interface = efi_uninstall_protocol_interface,
2771 .handle_protocol = efi_handle_protocol,
2773 .register_protocol_notify = efi_register_protocol_notify,
2774 .locate_handle = efi_locate_handle_ext,
2775 .locate_device_path = efi_locate_device_path,
2776 .install_configuration_table = efi_install_configuration_table_ext,
2777 .load_image = efi_load_image,
2778 .start_image = efi_start_image,
2780 .unload_image = efi_unload_image,
2781 .exit_boot_services = efi_exit_boot_services,
2782 .get_next_monotonic_count = efi_get_next_monotonic_count,
2784 .set_watchdog_timer = efi_set_watchdog_timer,
2785 .connect_controller = efi_connect_controller,
2786 .disconnect_controller = efi_disconnect_controller,
2787 .open_protocol = efi_open_protocol,
2788 .close_protocol = efi_close_protocol,
2789 .open_protocol_information = efi_open_protocol_information,
2790 .protocols_per_handle = efi_protocols_per_handle,
2791 .locate_handle_buffer = efi_locate_handle_buffer,
2792 .locate_protocol = efi_locate_protocol,
2793 .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
2794 .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
2795 .calculate_crc32 = efi_calculate_crc32,
2796 .copy_mem = efi_copy_mem,
2797 .set_mem = efi_set_mem,
2801 static uint16_t __efi_runtime_data firmware_vendor[] = L"Das U-Boot";
2803 struct efi_system_table __efi_runtime_data systab = {
2805 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
2806 .revision = 0x20005, /* 2.5 */
2807 .headersize = sizeof(struct efi_table_hdr),
2809 .fw_vendor = (long)firmware_vendor,
2810 .con_in = (void*)&efi_con_in,
2811 .con_out = (void*)&efi_con_out,
2812 .std_err = (void*)&efi_con_out,
2813 .runtime = (void*)&efi_runtime_services,
2814 .boottime = (void*)&efi_boot_services,
2816 .tables = (void*)efi_conf_table,