2 * EFI application boot time services
4 * Copyright (c) 2016 Alexander Graf
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <efi_loader.h>
11 #include <environment.h>
13 #include <asm/global_data.h>
14 #include <libfdt_env.h>
15 #include <u-boot/crc.h>
20 DECLARE_GLOBAL_DATA_PTR;
22 /* Task priority level */
23 static UINTN efi_tpl = TPL_APPLICATION;
25 /* This list contains all the EFI objects our payload has access to */
26 LIST_HEAD(efi_obj_list);
29 * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
30 * we need to do trickery with caches. Since we don't want to break the EFI
31 * aware boot path, only apply hacks when loading exiting directly (breaking
32 * direct Linux EFI booting along the way - oh well).
34 static bool efi_is_direct_boot = true;
37 * EFI can pass arbitrary additional "tables" containing vendor specific
38 * information to the payload. One such table is the FDT table which contains
39 * a pointer to a flattened device tree blob.
41 * In most cases we want to pass an FDT to the payload, so reserve one slot of
42 * config table space for it. The pointer gets populated by do_bootefi_exec().
44 static struct efi_configuration_table __efi_runtime_data efi_conf_table[2];
48 * The "gd" pointer lives in a register on ARM and AArch64 that we declare
49 * fixed when compiling U-Boot. However, the payload does not know about that
50 * restriction so we need to manually swap its and our view of that register on
51 * EFI callback entry/exit.
53 static volatile void *efi_gd, *app_gd;
56 static int entry_count;
57 static int nesting_level;
59 /* Called on every callback entry */
60 int __efi_entry_check(void)
62 int ret = entry_count++ == 0;
71 /* Called on every callback exit */
72 int __efi_exit_check(void)
74 int ret = --entry_count == 0;
81 /* Called from do_bootefi_exec() */
82 void efi_save_gd(void)
90 * Special case handler for error/abort that just forces things back
91 * to u-boot world so we can dump out an abort msg, without any care
92 * about returning back to UEFI world.
94 void efi_restore_gd(void)
97 /* Only restore if we're already in EFI context */
105 * Two spaces per indent level, maxing out at 10.. which ought to be
106 * enough for anyone ;-)
108 static const char *indent_string(int level)
110 const char *indent = " ";
111 const int max = strlen(indent);
112 level = min(max, level * 2);
113 return &indent[max - level];
116 const char *__efi_nesting(void)
118 return indent_string(nesting_level);
121 const char *__efi_nesting_inc(void)
123 return indent_string(nesting_level++);
126 const char *__efi_nesting_dec(void)
128 return indent_string(--nesting_level);
132 #define EFI_LOW32(a) (a & 0xFFFFFFFFULL)
134 #define EFI_HIGH32(a) (a >> 32)
137 * 64bit division by 10 implemented as multiplication by 1 / 10
139 * Decimals of one tenth: 0x1 / 0xA = 0x0.19999...
141 #define EFI_TENTH 0x199999999999999A
142 static u64 efi_div10(u64 a)
148 ret = EFI_HIGH32(a) * EFI_HIGH32(EFI_TENTH);
149 prod = EFI_HIGH32(a) * EFI_LOW32(EFI_TENTH);
150 rem = EFI_LOW32(prod);
151 ret += EFI_HIGH32(prod);
152 prod = EFI_LOW32(a) * EFI_HIGH32(EFI_TENTH);
153 rem += EFI_LOW32(prod);
154 ret += EFI_HIGH32(prod);
155 prod = EFI_LOW32(a) * EFI_LOW32(EFI_TENTH);
156 rem += EFI_HIGH32(prod);
157 ret += EFI_HIGH32(rem);
158 /* Round to nearest integer */
159 if (rem >= (1 << 31))
164 void efi_signal_event(struct efi_event *event)
166 if (event->notify_function) {
169 if (efi_tpl >= event->notify_tpl)
171 EFI_CALL_VOID(event->notify_function(event,
172 event->notify_context));
177 static efi_status_t efi_unsupported(const char *funcname)
179 debug("EFI: App called into unimplemented function %s\n", funcname);
180 return EFI_EXIT(EFI_UNSUPPORTED);
183 static unsigned long EFIAPI efi_raise_tpl(UINTN new_tpl)
185 UINTN old_tpl = efi_tpl;
187 EFI_ENTRY("0x%zx", new_tpl);
189 if (new_tpl < efi_tpl)
190 debug("WARNING: new_tpl < current_tpl in %s\n", __func__);
192 if (efi_tpl > TPL_HIGH_LEVEL)
193 efi_tpl = TPL_HIGH_LEVEL;
195 EFI_EXIT(EFI_SUCCESS);
199 static void EFIAPI efi_restore_tpl(UINTN old_tpl)
201 EFI_ENTRY("0x%zx", old_tpl);
203 if (old_tpl > efi_tpl)
204 debug("WARNING: old_tpl > current_tpl in %s\n", __func__);
206 if (efi_tpl > TPL_HIGH_LEVEL)
207 efi_tpl = TPL_HIGH_LEVEL;
209 EFI_EXIT(EFI_SUCCESS);
212 static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
218 EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
219 r = efi_allocate_pages(type, memory_type, pages, memory);
223 static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
228 EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
229 r = efi_free_pages(memory, pages);
233 static efi_status_t EFIAPI efi_get_memory_map_ext(
234 unsigned long *memory_map_size,
235 struct efi_mem_desc *memory_map,
236 unsigned long *map_key,
237 unsigned long *descriptor_size,
238 uint32_t *descriptor_version)
242 EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
243 map_key, descriptor_size, descriptor_version);
244 r = efi_get_memory_map(memory_map_size, memory_map, map_key,
245 descriptor_size, descriptor_version);
249 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
255 EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
256 r = efi_allocate_pool(pool_type, size, buffer);
260 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
264 EFI_ENTRY("%p", buffer);
265 r = efi_free_pool(buffer);
270 * Our event capabilities are very limited. Only a small limited
271 * number of events is allowed to coexist.
273 static struct efi_event efi_events[16];
275 efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
276 void (EFIAPI *notify_function) (
277 struct efi_event *event,
279 void *notify_context, struct efi_event **event)
284 return EFI_INVALID_PARAMETER;
286 if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
287 return EFI_INVALID_PARAMETER;
289 if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
290 notify_function == NULL)
291 return EFI_INVALID_PARAMETER;
293 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
294 if (efi_events[i].type)
296 efi_events[i].type = type;
297 efi_events[i].notify_tpl = notify_tpl;
298 efi_events[i].notify_function = notify_function;
299 efi_events[i].notify_context = notify_context;
300 /* Disable timers on bootup */
301 efi_events[i].trigger_next = -1ULL;
302 efi_events[i].queued = 0;
303 efi_events[i].signaled = 0;
304 *event = &efi_events[i];
307 return EFI_OUT_OF_RESOURCES;
310 static efi_status_t EFIAPI efi_create_event_ext(
311 uint32_t type, UINTN notify_tpl,
312 void (EFIAPI *notify_function) (
313 struct efi_event *event,
315 void *notify_context, struct efi_event **event)
317 EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
319 return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
320 notify_context, event));
325 * Our timers have to work without interrupts, so we check whenever keyboard
326 * input or disk accesses happen if enough time elapsed for it to fire.
328 void efi_timer_check(void)
331 u64 now = timer_get_us();
333 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
334 if (!efi_events[i].type)
336 if (efi_events[i].queued)
337 efi_signal_event(&efi_events[i]);
338 if (!(efi_events[i].type & EVT_TIMER) ||
339 now < efi_events[i].trigger_next)
341 switch (efi_events[i].trigger_type) {
342 case EFI_TIMER_RELATIVE:
343 efi_events[i].trigger_type = EFI_TIMER_STOP;
345 case EFI_TIMER_PERIODIC:
346 efi_events[i].trigger_next +=
347 efi_events[i].trigger_time;
352 efi_events[i].signaled = 1;
353 efi_signal_event(&efi_events[i]);
358 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
359 uint64_t trigger_time)
364 * The parameter defines a multiple of 100ns.
365 * We use multiples of 1000ns. So divide by 10.
367 trigger_time = efi_div10(trigger_time);
369 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
370 if (event != &efi_events[i])
373 if (!(event->type & EVT_TIMER))
377 event->trigger_next = -1ULL;
379 case EFI_TIMER_PERIODIC:
380 case EFI_TIMER_RELATIVE:
381 event->trigger_next =
382 timer_get_us() + trigger_time;
385 return EFI_INVALID_PARAMETER;
387 event->trigger_type = type;
388 event->trigger_time = trigger_time;
392 return EFI_INVALID_PARAMETER;
395 static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
396 enum efi_timer_delay type,
397 uint64_t trigger_time)
399 EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
400 return EFI_EXIT(efi_set_timer(event, type, trigger_time));
403 static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
404 struct efi_event **event,
405 unsigned long *index)
409 EFI_ENTRY("%ld, %p, %p", num_events, event, index);
411 /* Check parameters */
412 if (!num_events || !event)
413 return EFI_EXIT(EFI_INVALID_PARAMETER);
415 if (efi_tpl != TPL_APPLICATION)
416 return EFI_EXIT(EFI_UNSUPPORTED);
417 for (i = 0; i < num_events; ++i) {
418 for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
419 if (event[i] == &efi_events[j])
422 return EFI_EXIT(EFI_INVALID_PARAMETER);
424 if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
425 return EFI_EXIT(EFI_INVALID_PARAMETER);
426 if (!event[i]->signaled)
427 efi_signal_event(event[i]);
430 /* Wait for signal */
432 for (i = 0; i < num_events; ++i) {
433 if (event[i]->signaled)
436 /* Allow events to occur. */
442 * Reset the signal which is passed to the caller to allow periodic
445 event[i]->signaled = 0;
449 return EFI_EXIT(EFI_SUCCESS);
452 static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
456 EFI_ENTRY("%p", event);
457 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
458 if (event != &efi_events[i])
463 if (event->type & EVT_NOTIFY_SIGNAL)
464 efi_signal_event(event);
467 return EFI_EXIT(EFI_SUCCESS);
470 static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
474 EFI_ENTRY("%p", event);
475 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
476 if (event == &efi_events[i]) {
478 event->trigger_next = -1ULL;
481 return EFI_EXIT(EFI_SUCCESS);
484 return EFI_EXIT(EFI_INVALID_PARAMETER);
487 static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
491 EFI_ENTRY("%p", event);
493 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
494 if (event != &efi_events[i])
496 if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
498 if (!event->signaled)
499 efi_signal_event(event);
501 return EFI_EXIT(EFI_SUCCESS);
502 return EFI_EXIT(EFI_NOT_READY);
504 return EFI_EXIT(EFI_INVALID_PARAMETER);
507 static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
508 efi_guid_t *protocol, int protocol_interface_type,
509 void *protocol_interface)
511 struct list_head *lhandle;
515 if (!handle || !protocol ||
516 protocol_interface_type != EFI_NATIVE_INTERFACE) {
517 r = EFI_INVALID_PARAMETER;
521 /* Create new handle if requested. */
523 r = EFI_OUT_OF_RESOURCES;
527 list_for_each(lhandle, &efi_obj_list) {
528 struct efi_object *efiobj;
529 efiobj = list_entry(lhandle, struct efi_object, link);
531 if (efiobj->handle != *handle)
533 /* Check if protocol is already installed on the handle. */
534 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
535 struct efi_handler *handler = &efiobj->protocols[i];
539 if (!guidcmp(handler->guid, protocol)) {
540 r = EFI_INVALID_PARAMETER;
544 /* Install protocol in first empty slot. */
545 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
546 struct efi_handler *handler = &efiobj->protocols[i];
551 handler->guid = protocol;
552 handler->protocol_interface = protocol_interface;
556 r = EFI_OUT_OF_RESOURCES;
559 r = EFI_INVALID_PARAMETER;
564 static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
565 efi_guid_t *protocol, int protocol_interface_type,
566 void *protocol_interface)
568 EFI_ENTRY("%p, %pUl, %d, %p", handle, protocol, protocol_interface_type,
571 return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
572 protocol_interface_type,
573 protocol_interface));
576 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
577 efi_guid_t *protocol, void *old_interface,
580 EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface,
582 return EFI_EXIT(EFI_ACCESS_DENIED);
585 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
586 efi_guid_t *protocol, void *protocol_interface)
588 struct list_head *lhandle;
590 efi_status_t r = EFI_NOT_FOUND;
592 if (!handle || !protocol) {
593 r = EFI_INVALID_PARAMETER;
597 list_for_each(lhandle, &efi_obj_list) {
598 struct efi_object *efiobj;
599 efiobj = list_entry(lhandle, struct efi_object, link);
601 if (efiobj->handle != handle)
604 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
605 struct efi_handler *handler = &efiobj->protocols[i];
606 const efi_guid_t *hprotocol = handler->guid;
610 if (!guidcmp(hprotocol, protocol)) {
611 if (handler->protocol_interface) {
612 r = EFI_ACCESS_DENIED;
626 static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
627 efi_guid_t *protocol, void *protocol_interface)
629 EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
631 return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
632 protocol_interface));
635 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
636 struct efi_event *event,
639 EFI_ENTRY("%pUl, %p, %p", protocol, event, registration);
640 return EFI_EXIT(EFI_OUT_OF_RESOURCES);
643 static int efi_search(enum efi_locate_search_type search_type,
644 efi_guid_t *protocol, void *search_key,
645 struct efi_object *efiobj)
649 switch (search_type) {
652 case by_register_notify:
655 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
656 const efi_guid_t *guid = efiobj->protocols[i].guid;
657 if (guid && !guidcmp(guid, protocol))
666 static efi_status_t efi_locate_handle(
667 enum efi_locate_search_type search_type,
668 efi_guid_t *protocol, void *search_key,
669 unsigned long *buffer_size, efi_handle_t *buffer)
671 struct list_head *lhandle;
672 unsigned long size = 0;
674 /* Count how much space we need */
675 list_for_each(lhandle, &efi_obj_list) {
676 struct efi_object *efiobj;
677 efiobj = list_entry(lhandle, struct efi_object, link);
678 if (!efi_search(search_type, protocol, search_key, efiobj)) {
679 size += sizeof(void*);
683 if (*buffer_size < size) {
685 return EFI_BUFFER_TOO_SMALL;
690 return EFI_NOT_FOUND;
692 /* Then fill the array */
693 list_for_each(lhandle, &efi_obj_list) {
694 struct efi_object *efiobj;
695 efiobj = list_entry(lhandle, struct efi_object, link);
696 if (!efi_search(search_type, protocol, search_key, efiobj)) {
697 *(buffer++) = efiobj->handle;
704 static efi_status_t EFIAPI efi_locate_handle_ext(
705 enum efi_locate_search_type search_type,
706 efi_guid_t *protocol, void *search_key,
707 unsigned long *buffer_size, efi_handle_t *buffer)
709 EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key,
710 buffer_size, buffer);
712 return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
713 buffer_size, buffer));
716 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
717 struct efi_device_path **device_path,
718 efi_handle_t *device)
720 struct efi_object *efiobj;
722 EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
724 efiobj = efi_dp_find_obj(*device_path, device_path);
726 return EFI_EXIT(EFI_NOT_FOUND);
728 *device = efiobj->handle;
730 return EFI_EXIT(EFI_SUCCESS);
733 /* Collapses configuration table entries, removing index i */
734 static void efi_remove_configuration_table(int i)
736 struct efi_configuration_table *this = &efi_conf_table[i];
737 struct efi_configuration_table *next = &efi_conf_table[i+1];
738 struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
740 memmove(this, next, (ulong)end - (ulong)next);
744 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
748 /* Check for guid override */
749 for (i = 0; i < systab.nr_tables; i++) {
750 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
752 efi_conf_table[i].table = table;
754 efi_remove_configuration_table(i);
760 return EFI_NOT_FOUND;
762 /* No override, check for overflow */
763 if (i >= ARRAY_SIZE(efi_conf_table))
764 return EFI_OUT_OF_RESOURCES;
766 /* Add a new entry */
767 memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
768 efi_conf_table[i].table = table;
769 systab.nr_tables = i + 1;
774 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
777 EFI_ENTRY("%pUl, %p", guid, table);
778 return EFI_EXIT(efi_install_configuration_table(guid, table));
781 /* Initialize a loaded_image_info + loaded_image_info object with correct
782 * protocols, boot-device, etc.
784 void efi_setup_loaded_image(struct efi_loaded_image *info, struct efi_object *obj,
785 struct efi_device_path *device_path,
786 struct efi_device_path *file_path)
791 * When asking for the device path interface, return
792 * bootefi_device_path
794 obj->protocols[0].guid = &efi_guid_device_path;
795 obj->protocols[0].protocol_interface = device_path;
798 * When asking for the loaded_image interface, just
799 * return handle which points to loaded_image_info
801 obj->protocols[1].guid = &efi_guid_loaded_image;
802 obj->protocols[1].protocol_interface = info;
804 obj->protocols[2].guid = &efi_guid_console_control;
805 obj->protocols[2].protocol_interface = (void *)&efi_console_control;
807 obj->protocols[3].guid = &efi_guid_device_path_to_text_protocol;
808 obj->protocols[3].protocol_interface =
809 (void *)&efi_device_path_to_text;
811 info->file_path = file_path;
812 info->device_handle = efi_dp_find_obj(device_path, NULL);
814 list_add_tail(&obj->link, &efi_obj_list);
817 efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
820 struct efi_file_info *info = NULL;
821 struct efi_file_handle *f;
822 static efi_status_t ret;
825 f = efi_file_from_path(file_path);
827 return EFI_DEVICE_ERROR;
830 EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
832 if (ret == EFI_BUFFER_TOO_SMALL) {
834 EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
837 if (ret != EFI_SUCCESS)
840 ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer);
844 EFI_CALL(ret = f->read(f, &info->file_size, *buffer));
848 EFI_CALL(f->close(f));
850 if (ret != EFI_SUCCESS) {
851 efi_free_pool(*buffer);
858 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
859 efi_handle_t parent_image,
860 struct efi_device_path *file_path,
862 unsigned long source_size,
863 efi_handle_t *image_handle)
865 struct efi_loaded_image *info;
866 struct efi_object *obj;
868 EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
869 file_path, source_buffer, source_size, image_handle);
871 info = calloc(1, sizeof(*info));
872 obj = calloc(1, sizeof(*obj));
874 if (!source_buffer) {
875 struct efi_device_path *dp, *fp;
878 ret = efi_load_image_from_path(file_path, &source_buffer);
879 if (ret != EFI_SUCCESS) {
882 return EFI_EXIT(ret);
886 * split file_path which contains both the device and
889 efi_dp_split_file_path(file_path, &dp, &fp);
891 efi_setup_loaded_image(info, obj, dp, fp);
893 /* In this case, file_path is the "device" path, ie.
894 * something like a HARDWARE_DEVICE:MEMORY_MAPPED
896 efi_setup_loaded_image(info, obj, file_path, NULL);
899 info->reserved = efi_load_pe(source_buffer, info);
900 if (!info->reserved) {
903 return EFI_EXIT(EFI_UNSUPPORTED);
906 *image_handle = info;
908 return EFI_EXIT(EFI_SUCCESS);
911 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
912 unsigned long *exit_data_size,
915 ulong (*entry)(void *image_handle, struct efi_system_table *st);
916 struct efi_loaded_image *info = image_handle;
918 EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
919 entry = info->reserved;
921 efi_is_direct_boot = false;
923 /* call the image! */
924 if (setjmp(&info->exit_jmp)) {
925 /* We returned from the child image */
926 return EFI_EXIT(info->exit_status);
931 entry(image_handle, &systab);
935 /* Should usually never get here */
936 return EFI_EXIT(EFI_SUCCESS);
939 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
940 efi_status_t exit_status, unsigned long exit_data_size,
943 struct efi_loaded_image *loaded_image_info = (void*)image_handle;
945 EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
946 exit_data_size, exit_data);
948 /* Make sure entry/exit counts for EFI world cross-overs match */
952 * But longjmp out with the U-Boot gd, not the application's, as
953 * the other end is a setjmp call inside EFI context.
957 loaded_image_info->exit_status = exit_status;
958 longjmp(&loaded_image_info->exit_jmp, 1);
960 panic("EFI application exited");
963 static struct efi_object *efi_search_obj(void *handle)
965 struct list_head *lhandle;
967 list_for_each(lhandle, &efi_obj_list) {
968 struct efi_object *efiobj;
969 efiobj = list_entry(lhandle, struct efi_object, link);
970 if (efiobj->handle == handle)
977 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
979 struct efi_object *efiobj;
981 EFI_ENTRY("%p", image_handle);
982 efiobj = efi_search_obj(image_handle);
984 list_del(&efiobj->link);
986 return EFI_EXIT(EFI_SUCCESS);
989 static void efi_exit_caches(void)
991 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
993 * Grub on 32bit ARM needs to have caches disabled before jumping into
994 * a zImage, but does not know of all cache layers. Give it a hand.
996 if (efi_is_direct_boot)
997 cleanup_before_linux();
1001 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
1002 unsigned long map_key)
1006 EFI_ENTRY("%p, %ld", image_handle, map_key);
1008 /* Notify that ExitBootServices is invoked. */
1009 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
1010 if (efi_events[i].type != EVT_SIGNAL_EXIT_BOOT_SERVICES)
1012 efi_signal_event(&efi_events[i]);
1014 /* Make sure that notification functions are not called anymore */
1015 efi_tpl = TPL_HIGH_LEVEL;
1017 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1018 /* save any EFI variables that have been written: */
1022 board_quiesce_devices();
1024 /* Fix up caches for EFI payloads if necessary */
1027 /* This stops all lingering devices */
1028 bootm_disable_interrupts();
1030 /* Give the payload some time to boot */
1033 return EFI_EXIT(EFI_SUCCESS);
1036 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
1038 static uint64_t mono = 0;
1039 EFI_ENTRY("%p", count);
1041 return EFI_EXIT(EFI_SUCCESS);
1044 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
1046 EFI_ENTRY("%ld", microseconds);
1047 udelay(microseconds);
1048 return EFI_EXIT(EFI_SUCCESS);
1051 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
1052 uint64_t watchdog_code,
1053 unsigned long data_size,
1054 uint16_t *watchdog_data)
1056 EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
1057 data_size, watchdog_data);
1058 return efi_unsupported(__func__);
1061 static efi_status_t EFIAPI efi_connect_controller(
1062 efi_handle_t controller_handle,
1063 efi_handle_t *driver_image_handle,
1064 struct efi_device_path *remain_device_path,
1067 EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
1068 remain_device_path, recursive);
1069 return EFI_EXIT(EFI_NOT_FOUND);
1072 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
1073 void *driver_image_handle,
1076 EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
1078 return EFI_EXIT(EFI_INVALID_PARAMETER);
1081 static efi_status_t EFIAPI efi_close_protocol(void *handle,
1082 efi_guid_t *protocol,
1084 void *controller_handle)
1086 EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle,
1088 return EFI_EXIT(EFI_NOT_FOUND);
1091 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
1092 efi_guid_t *protocol,
1093 struct efi_open_protocol_info_entry **entry_buffer,
1094 unsigned long *entry_count)
1096 EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer,
1098 return EFI_EXIT(EFI_NOT_FOUND);
1101 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
1102 efi_guid_t ***protocol_buffer,
1103 unsigned long *protocol_buffer_count)
1105 unsigned long buffer_size;
1106 struct efi_object *efiobj;
1108 struct list_head *lhandle;
1111 EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
1112 protocol_buffer_count);
1114 if (!handle || !protocol_buffer || !protocol_buffer_count)
1115 return EFI_EXIT(EFI_INVALID_PARAMETER);
1117 *protocol_buffer = NULL;
1118 *protocol_buffer_count = 0;
1119 list_for_each(lhandle, &efi_obj_list) {
1120 efiobj = list_entry(lhandle, struct efi_object, link);
1122 if (efiobj->handle != handle)
1125 /* Count protocols */
1126 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1127 if (efiobj->protocols[i].guid)
1128 ++*protocol_buffer_count;
1131 if (*protocol_buffer_count) {
1132 buffer_size = sizeof(efi_guid_t *) *
1133 *protocol_buffer_count;
1134 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
1136 (void **)protocol_buffer);
1137 if (r != EFI_SUCCESS)
1140 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
1141 if (efiobj->protocols[i].guid) {
1142 (*protocol_buffer)[j] = (void *)
1143 efiobj->protocols[i].guid;
1151 return EFI_EXIT(EFI_SUCCESS);
1154 static efi_status_t EFIAPI efi_locate_handle_buffer(
1155 enum efi_locate_search_type search_type,
1156 efi_guid_t *protocol, void *search_key,
1157 unsigned long *no_handles, efi_handle_t **buffer)
1160 unsigned long buffer_size = 0;
1162 EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key,
1163 no_handles, buffer);
1165 if (!no_handles || !buffer) {
1166 r = EFI_INVALID_PARAMETER;
1171 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1173 if (r != EFI_BUFFER_TOO_SMALL)
1175 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1177 if (r != EFI_SUCCESS)
1179 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1181 if (r == EFI_SUCCESS)
1182 *no_handles = buffer_size / sizeof(void *);
1187 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
1189 void **protocol_interface)
1191 struct list_head *lhandle;
1194 EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface);
1196 if (!protocol || !protocol_interface)
1197 return EFI_EXIT(EFI_INVALID_PARAMETER);
1199 EFI_PRINT_GUID("protocol", protocol);
1201 list_for_each(lhandle, &efi_obj_list) {
1202 struct efi_object *efiobj;
1204 efiobj = list_entry(lhandle, struct efi_object, link);
1205 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1206 struct efi_handler *handler = &efiobj->protocols[i];
1210 if (!guidcmp(handler->guid, protocol)) {
1211 *protocol_interface =
1212 handler->protocol_interface;
1213 return EFI_EXIT(EFI_SUCCESS);
1217 *protocol_interface = NULL;
1219 return EFI_EXIT(EFI_NOT_FOUND);
1222 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
1225 EFI_ENTRY("%p", handle);
1228 efi_guid_t *protocol;
1229 void *protocol_interface;
1230 efi_status_t r = EFI_SUCCESS;
1234 return EFI_EXIT(EFI_INVALID_PARAMETER);
1236 va_start(argptr, handle);
1238 protocol = va_arg(argptr, efi_guid_t*);
1241 protocol_interface = va_arg(argptr, void*);
1242 r = efi_install_protocol_interface(handle, protocol,
1243 EFI_NATIVE_INTERFACE,
1244 protocol_interface);
1245 if (r != EFI_SUCCESS)
1250 if (r == EFI_SUCCESS)
1253 /* If an error occured undo all changes. */
1254 va_start(argptr, handle);
1256 protocol = va_arg(argptr, efi_guid_t*);
1257 protocol_interface = va_arg(argptr, void*);
1258 efi_uninstall_protocol_interface(handle, protocol,
1259 protocol_interface);
1266 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
1269 EFI_ENTRY("%p", handle);
1270 return EFI_EXIT(EFI_INVALID_PARAMETER);
1273 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
1274 unsigned long data_size,
1277 EFI_ENTRY("%p, %ld", data, data_size);
1278 *crc32_p = crc32(0, data, data_size);
1279 return EFI_EXIT(EFI_SUCCESS);
1282 static void EFIAPI efi_copy_mem(void *destination, void *source,
1283 unsigned long length)
1285 EFI_ENTRY("%p, %p, %ld", destination, source, length);
1286 memcpy(destination, source, length);
1289 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
1291 EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
1292 memset(buffer, value, size);
1295 static efi_status_t EFIAPI efi_open_protocol(
1296 void *handle, efi_guid_t *protocol,
1297 void **protocol_interface, void *agent_handle,
1298 void *controller_handle, uint32_t attributes)
1300 struct list_head *lhandle;
1302 efi_status_t r = EFI_INVALID_PARAMETER;
1304 EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle, protocol,
1305 protocol_interface, agent_handle, controller_handle,
1308 if (!handle || !protocol ||
1309 (!protocol_interface && attributes !=
1310 EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
1314 EFI_PRINT_GUID("protocol", protocol);
1316 switch (attributes) {
1317 case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
1318 case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
1319 case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
1321 case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
1322 if (controller_handle == handle)
1324 case EFI_OPEN_PROTOCOL_BY_DRIVER:
1325 case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
1326 if (controller_handle == NULL)
1328 case EFI_OPEN_PROTOCOL_EXCLUSIVE:
1329 if (agent_handle == NULL)
1336 list_for_each(lhandle, &efi_obj_list) {
1337 struct efi_object *efiobj;
1338 efiobj = list_entry(lhandle, struct efi_object, link);
1340 if (efiobj->handle != handle)
1343 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1344 struct efi_handler *handler = &efiobj->protocols[i];
1345 const efi_guid_t *hprotocol = handler->guid;
1348 if (!guidcmp(hprotocol, protocol)) {
1350 EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
1351 *protocol_interface =
1352 handler->protocol_interface;
1362 r = EFI_UNSUPPORTED;
1367 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
1368 efi_guid_t *protocol,
1369 void **protocol_interface)
1371 return efi_open_protocol(handle, protocol, protocol_interface, NULL,
1372 NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
1375 static const struct efi_boot_services efi_boot_services = {
1377 .headersize = sizeof(struct efi_table_hdr),
1379 .raise_tpl = efi_raise_tpl,
1380 .restore_tpl = efi_restore_tpl,
1381 .allocate_pages = efi_allocate_pages_ext,
1382 .free_pages = efi_free_pages_ext,
1383 .get_memory_map = efi_get_memory_map_ext,
1384 .allocate_pool = efi_allocate_pool_ext,
1385 .free_pool = efi_free_pool_ext,
1386 .create_event = efi_create_event_ext,
1387 .set_timer = efi_set_timer_ext,
1388 .wait_for_event = efi_wait_for_event,
1389 .signal_event = efi_signal_event_ext,
1390 .close_event = efi_close_event,
1391 .check_event = efi_check_event,
1392 .install_protocol_interface = efi_install_protocol_interface_ext,
1393 .reinstall_protocol_interface = efi_reinstall_protocol_interface,
1394 .uninstall_protocol_interface = efi_uninstall_protocol_interface_ext,
1395 .handle_protocol = efi_handle_protocol,
1397 .register_protocol_notify = efi_register_protocol_notify,
1398 .locate_handle = efi_locate_handle_ext,
1399 .locate_device_path = efi_locate_device_path,
1400 .install_configuration_table = efi_install_configuration_table_ext,
1401 .load_image = efi_load_image,
1402 .start_image = efi_start_image,
1404 .unload_image = efi_unload_image,
1405 .exit_boot_services = efi_exit_boot_services,
1406 .get_next_monotonic_count = efi_get_next_monotonic_count,
1408 .set_watchdog_timer = efi_set_watchdog_timer,
1409 .connect_controller = efi_connect_controller,
1410 .disconnect_controller = efi_disconnect_controller,
1411 .open_protocol = efi_open_protocol,
1412 .close_protocol = efi_close_protocol,
1413 .open_protocol_information = efi_open_protocol_information,
1414 .protocols_per_handle = efi_protocols_per_handle,
1415 .locate_handle_buffer = efi_locate_handle_buffer,
1416 .locate_protocol = efi_locate_protocol,
1417 .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
1418 .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
1419 .calculate_crc32 = efi_calculate_crc32,
1420 .copy_mem = efi_copy_mem,
1421 .set_mem = efi_set_mem,
1425 static uint16_t __efi_runtime_data firmware_vendor[] =
1426 { 'D','a','s',' ','U','-','b','o','o','t',0 };
1428 struct efi_system_table __efi_runtime_data systab = {
1430 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
1431 .revision = 0x20005, /* 2.5 */
1432 .headersize = sizeof(struct efi_table_hdr),
1434 .fw_vendor = (long)firmware_vendor,
1435 .con_in = (void*)&efi_con_in,
1436 .con_out = (void*)&efi_con_out,
1437 .std_err = (void*)&efi_con_out,
1438 .runtime = (void*)&efi_runtime_services,
1439 .boottime = (void*)&efi_boot_services,
1441 .tables = (void*)efi_conf_table,