2 * EFI application boot time services
4 * Copyright (c) 2016 Alexander Graf
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <efi_loader.h>
12 #include <asm/global_data.h>
13 #include <libfdt_env.h>
14 #include <u-boot/crc.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 /* Task priority level */
22 static UINTN efi_tpl = TPL_APPLICATION;
24 /* This list contains all the EFI objects our payload has access to */
25 LIST_HEAD(efi_obj_list);
28 * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
29 * we need to do trickery with caches. Since we don't want to break the EFI
30 * aware boot path, only apply hacks when loading exiting directly (breaking
31 * direct Linux EFI booting along the way - oh well).
33 static bool efi_is_direct_boot = true;
36 * EFI can pass arbitrary additional "tables" containing vendor specific
37 * information to the payload. One such table is the FDT table which contains
38 * a pointer to a flattened device tree blob.
40 * In most cases we want to pass an FDT to the payload, so reserve one slot of
41 * config table space for it. The pointer gets populated by do_bootefi_exec().
43 static struct efi_configuration_table __efi_runtime_data efi_conf_table[2];
47 * The "gd" pointer lives in a register on ARM and AArch64 that we declare
48 * fixed when compiling U-Boot. However, the payload does not know about that
49 * restriction so we need to manually swap its and our view of that register on
50 * EFI callback entry/exit.
52 static volatile void *efi_gd, *app_gd;
55 static int entry_count;
56 static int nesting_level;
58 /* Called on every callback entry */
59 int __efi_entry_check(void)
61 int ret = entry_count++ == 0;
70 /* Called on every callback exit */
71 int __efi_exit_check(void)
73 int ret = --entry_count == 0;
80 /* Called from do_bootefi_exec() */
81 void efi_save_gd(void)
89 * Special case handler for error/abort that just forces things back
90 * to u-boot world so we can dump out an abort msg, without any care
91 * about returning back to UEFI world.
93 void efi_restore_gd(void)
96 /* Only restore if we're already in EFI context */
104 * Two spaces per indent level, maxing out at 10.. which ought to be
105 * enough for anyone ;-)
107 static const char *indent_string(int level)
109 const char *indent = " ";
110 const int max = strlen(indent);
111 level = min(max, level * 2);
112 return &indent[max - level];
115 const char *__efi_nesting(void)
117 return indent_string(nesting_level);
120 const char *__efi_nesting_inc(void)
122 return indent_string(nesting_level++);
125 const char *__efi_nesting_dec(void)
127 return indent_string(--nesting_level);
131 #define EFI_LOW32(a) (a & 0xFFFFFFFFULL)
133 #define EFI_HIGH32(a) (a >> 32)
136 * 64bit division by 10 implemented as multiplication by 1 / 10
138 * Decimals of one tenth: 0x1 / 0xA = 0x0.19999...
140 #define EFI_TENTH 0x199999999999999A
141 static u64 efi_div10(u64 a)
147 ret = EFI_HIGH32(a) * EFI_HIGH32(EFI_TENTH);
148 prod = EFI_HIGH32(a) * EFI_LOW32(EFI_TENTH);
149 rem = EFI_LOW32(prod);
150 ret += EFI_HIGH32(prod);
151 prod = EFI_LOW32(a) * EFI_HIGH32(EFI_TENTH);
152 rem += EFI_LOW32(prod);
153 ret += EFI_HIGH32(prod);
154 prod = EFI_LOW32(a) * EFI_LOW32(EFI_TENTH);
155 rem += EFI_HIGH32(prod);
156 ret += EFI_HIGH32(rem);
157 /* Round to nearest integer */
158 if (rem >= (1 << 31))
163 void efi_signal_event(struct efi_event *event)
165 if (event->notify_function) {
168 if (efi_tpl >= event->notify_tpl)
170 EFI_CALL_VOID(event->notify_function(event,
171 event->notify_context));
176 static efi_status_t efi_unsupported(const char *funcname)
178 debug("EFI: App called into unimplemented function %s\n", funcname);
179 return EFI_EXIT(EFI_UNSUPPORTED);
182 static unsigned long EFIAPI efi_raise_tpl(UINTN new_tpl)
184 UINTN old_tpl = efi_tpl;
186 EFI_ENTRY("0x%zx", new_tpl);
188 if (new_tpl < efi_tpl)
189 debug("WARNING: new_tpl < current_tpl in %s\n", __func__);
191 if (efi_tpl > TPL_HIGH_LEVEL)
192 efi_tpl = TPL_HIGH_LEVEL;
194 EFI_EXIT(EFI_SUCCESS);
198 static void EFIAPI efi_restore_tpl(UINTN old_tpl)
200 EFI_ENTRY("0x%zx", old_tpl);
202 if (old_tpl > efi_tpl)
203 debug("WARNING: old_tpl > current_tpl in %s\n", __func__);
205 if (efi_tpl > TPL_HIGH_LEVEL)
206 efi_tpl = TPL_HIGH_LEVEL;
208 EFI_EXIT(EFI_SUCCESS);
211 static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
217 EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
218 r = efi_allocate_pages(type, memory_type, pages, memory);
222 static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
227 EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
228 r = efi_free_pages(memory, pages);
232 static efi_status_t EFIAPI efi_get_memory_map_ext(
233 unsigned long *memory_map_size,
234 struct efi_mem_desc *memory_map,
235 unsigned long *map_key,
236 unsigned long *descriptor_size,
237 uint32_t *descriptor_version)
241 EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
242 map_key, descriptor_size, descriptor_version);
243 r = efi_get_memory_map(memory_map_size, memory_map, map_key,
244 descriptor_size, descriptor_version);
248 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
254 EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
255 r = efi_allocate_pool(pool_type, size, buffer);
259 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
263 EFI_ENTRY("%p", buffer);
264 r = efi_free_pool(buffer);
269 * Our event capabilities are very limited. Only a small limited
270 * number of events is allowed to coexist.
272 static struct efi_event efi_events[16];
274 efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
275 void (EFIAPI *notify_function) (
276 struct efi_event *event,
278 void *notify_context, struct efi_event **event)
283 return EFI_INVALID_PARAMETER;
285 if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
286 return EFI_INVALID_PARAMETER;
288 if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
289 notify_function == NULL)
290 return EFI_INVALID_PARAMETER;
292 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
293 if (efi_events[i].type)
295 efi_events[i].type = type;
296 efi_events[i].notify_tpl = notify_tpl;
297 efi_events[i].notify_function = notify_function;
298 efi_events[i].notify_context = notify_context;
299 /* Disable timers on bootup */
300 efi_events[i].trigger_next = -1ULL;
301 efi_events[i].queued = 0;
302 efi_events[i].signaled = 0;
303 *event = &efi_events[i];
306 return EFI_OUT_OF_RESOURCES;
309 static efi_status_t EFIAPI efi_create_event_ext(
310 uint32_t type, UINTN notify_tpl,
311 void (EFIAPI *notify_function) (
312 struct efi_event *event,
314 void *notify_context, struct efi_event **event)
316 EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
318 return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
319 notify_context, event));
324 * Our timers have to work without interrupts, so we check whenever keyboard
325 * input or disk accesses happen if enough time elapsed for it to fire.
327 void efi_timer_check(void)
330 u64 now = timer_get_us();
332 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
333 if (!efi_events[i].type)
335 if (efi_events[i].queued)
336 efi_signal_event(&efi_events[i]);
337 if (!(efi_events[i].type & EVT_TIMER) ||
338 now < efi_events[i].trigger_next)
340 switch (efi_events[i].trigger_type) {
341 case EFI_TIMER_RELATIVE:
342 efi_events[i].trigger_type = EFI_TIMER_STOP;
344 case EFI_TIMER_PERIODIC:
345 efi_events[i].trigger_next +=
346 efi_events[i].trigger_time;
351 efi_events[i].signaled = 1;
352 efi_signal_event(&efi_events[i]);
357 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
358 uint64_t trigger_time)
363 * The parameter defines a multiple of 100ns.
364 * We use multiples of 1000ns. So divide by 10.
366 trigger_time = efi_div10(trigger_time);
368 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
369 if (event != &efi_events[i])
372 if (!(event->type & EVT_TIMER))
376 event->trigger_next = -1ULL;
378 case EFI_TIMER_PERIODIC:
379 case EFI_TIMER_RELATIVE:
380 event->trigger_next =
381 timer_get_us() + trigger_time;
384 return EFI_INVALID_PARAMETER;
386 event->trigger_type = type;
387 event->trigger_time = trigger_time;
391 return EFI_INVALID_PARAMETER;
394 static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
395 enum efi_timer_delay type,
396 uint64_t trigger_time)
398 EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
399 return EFI_EXIT(efi_set_timer(event, type, trigger_time));
402 static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
403 struct efi_event **event,
404 unsigned long *index)
408 EFI_ENTRY("%ld, %p, %p", num_events, event, index);
410 /* Check parameters */
411 if (!num_events || !event)
412 return EFI_EXIT(EFI_INVALID_PARAMETER);
414 if (efi_tpl != TPL_APPLICATION)
415 return EFI_EXIT(EFI_UNSUPPORTED);
416 for (i = 0; i < num_events; ++i) {
417 for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
418 if (event[i] == &efi_events[j])
421 return EFI_EXIT(EFI_INVALID_PARAMETER);
423 if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
424 return EFI_EXIT(EFI_INVALID_PARAMETER);
425 if (!event[i]->signaled)
426 efi_signal_event(event[i]);
429 /* Wait for signal */
431 for (i = 0; i < num_events; ++i) {
432 if (event[i]->signaled)
435 /* Allow events to occur. */
441 * Reset the signal which is passed to the caller to allow periodic
444 event[i]->signaled = 0;
448 return EFI_EXIT(EFI_SUCCESS);
451 static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
455 EFI_ENTRY("%p", event);
456 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
457 if (event != &efi_events[i])
462 if (event->type & EVT_NOTIFY_SIGNAL)
463 efi_signal_event(event);
466 return EFI_EXIT(EFI_SUCCESS);
469 static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
473 EFI_ENTRY("%p", event);
474 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
475 if (event == &efi_events[i]) {
477 event->trigger_next = -1ULL;
480 return EFI_EXIT(EFI_SUCCESS);
483 return EFI_EXIT(EFI_INVALID_PARAMETER);
486 static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
490 EFI_ENTRY("%p", event);
492 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
493 if (event != &efi_events[i])
495 if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
497 if (!event->signaled)
498 efi_signal_event(event);
500 return EFI_EXIT(EFI_SUCCESS);
501 return EFI_EXIT(EFI_NOT_READY);
503 return EFI_EXIT(EFI_INVALID_PARAMETER);
506 static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
507 efi_guid_t *protocol, int protocol_interface_type,
508 void *protocol_interface)
510 struct list_head *lhandle;
514 if (!handle || !protocol ||
515 protocol_interface_type != EFI_NATIVE_INTERFACE) {
516 r = EFI_INVALID_PARAMETER;
520 /* Create new handle if requested. */
522 r = EFI_OUT_OF_RESOURCES;
526 list_for_each(lhandle, &efi_obj_list) {
527 struct efi_object *efiobj;
528 efiobj = list_entry(lhandle, struct efi_object, link);
530 if (efiobj->handle != *handle)
532 /* Check if protocol is already installed on the handle. */
533 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
534 struct efi_handler *handler = &efiobj->protocols[i];
538 if (!guidcmp(handler->guid, protocol)) {
539 r = EFI_INVALID_PARAMETER;
543 /* Install protocol in first empty slot. */
544 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
545 struct efi_handler *handler = &efiobj->protocols[i];
550 handler->guid = protocol;
551 handler->protocol_interface = protocol_interface;
555 r = EFI_OUT_OF_RESOURCES;
558 r = EFI_INVALID_PARAMETER;
563 static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
564 efi_guid_t *protocol, int protocol_interface_type,
565 void *protocol_interface)
567 EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
570 return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
571 protocol_interface_type,
572 protocol_interface));
575 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
576 efi_guid_t *protocol, void *old_interface,
579 EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
581 return EFI_EXIT(EFI_ACCESS_DENIED);
584 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
585 efi_guid_t *protocol, void *protocol_interface)
587 struct list_head *lhandle;
589 efi_status_t r = EFI_NOT_FOUND;
591 if (!handle || !protocol) {
592 r = EFI_INVALID_PARAMETER;
596 list_for_each(lhandle, &efi_obj_list) {
597 struct efi_object *efiobj;
598 efiobj = list_entry(lhandle, struct efi_object, link);
600 if (efiobj->handle != handle)
603 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
604 struct efi_handler *handler = &efiobj->protocols[i];
605 const efi_guid_t *hprotocol = handler->guid;
609 if (!guidcmp(hprotocol, protocol)) {
610 if (handler->protocol_interface) {
611 r = EFI_ACCESS_DENIED;
625 static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
626 efi_guid_t *protocol, void *protocol_interface)
628 EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
630 return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
631 protocol_interface));
634 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
635 struct efi_event *event,
638 EFI_ENTRY("%p, %p, %p", protocol, event, registration);
639 return EFI_EXIT(EFI_OUT_OF_RESOURCES);
642 static int efi_search(enum efi_locate_search_type search_type,
643 efi_guid_t *protocol, void *search_key,
644 struct efi_object *efiobj)
648 switch (search_type) {
651 case by_register_notify:
654 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
655 const efi_guid_t *guid = efiobj->protocols[i].guid;
656 if (guid && !guidcmp(guid, protocol))
665 static efi_status_t efi_locate_handle(
666 enum efi_locate_search_type search_type,
667 efi_guid_t *protocol, void *search_key,
668 unsigned long *buffer_size, efi_handle_t *buffer)
670 struct list_head *lhandle;
671 unsigned long size = 0;
673 /* Count how much space we need */
674 list_for_each(lhandle, &efi_obj_list) {
675 struct efi_object *efiobj;
676 efiobj = list_entry(lhandle, struct efi_object, link);
677 if (!efi_search(search_type, protocol, search_key, efiobj)) {
678 size += sizeof(void*);
682 if (*buffer_size < size) {
684 return EFI_BUFFER_TOO_SMALL;
689 return EFI_NOT_FOUND;
691 /* Then fill the array */
692 list_for_each(lhandle, &efi_obj_list) {
693 struct efi_object *efiobj;
694 efiobj = list_entry(lhandle, struct efi_object, link);
695 if (!efi_search(search_type, protocol, search_key, efiobj)) {
696 *(buffer++) = efiobj->handle;
703 static efi_status_t EFIAPI efi_locate_handle_ext(
704 enum efi_locate_search_type search_type,
705 efi_guid_t *protocol, void *search_key,
706 unsigned long *buffer_size, efi_handle_t *buffer)
708 EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
709 buffer_size, buffer);
711 return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
712 buffer_size, buffer));
715 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
716 struct efi_device_path **device_path,
717 efi_handle_t *device)
719 EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
720 return EFI_EXIT(EFI_NOT_FOUND);
723 /* Collapses configuration table entries, removing index i */
724 static void efi_remove_configuration_table(int i)
726 struct efi_configuration_table *this = &efi_conf_table[i];
727 struct efi_configuration_table *next = &efi_conf_table[i+1];
728 struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
730 memmove(this, next, (ulong)end - (ulong)next);
734 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
738 /* Check for guid override */
739 for (i = 0; i < systab.nr_tables; i++) {
740 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
742 efi_conf_table[i].table = table;
744 efi_remove_configuration_table(i);
750 return EFI_NOT_FOUND;
752 /* No override, check for overflow */
753 if (i >= ARRAY_SIZE(efi_conf_table))
754 return EFI_OUT_OF_RESOURCES;
756 /* Add a new entry */
757 memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
758 efi_conf_table[i].table = table;
759 systab.nr_tables = i + 1;
764 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
767 EFI_ENTRY("%p, %p", guid, table);
768 return EFI_EXIT(efi_install_configuration_table(guid, table));
771 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
772 efi_handle_t parent_image,
773 struct efi_device_path *file_path,
775 unsigned long source_size,
776 efi_handle_t *image_handle)
778 static struct efi_object loaded_image_info_obj = {
781 .guid = &efi_guid_loaded_image,
785 struct efi_loaded_image *info;
786 struct efi_object *obj;
788 EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
789 file_path, source_buffer, source_size, image_handle);
790 info = malloc(sizeof(*info));
791 loaded_image_info_obj.protocols[0].protocol_interface = info;
792 obj = malloc(sizeof(loaded_image_info_obj));
793 memset(info, 0, sizeof(*info));
794 memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
796 info->file_path = file_path;
797 info->reserved = efi_load_pe(source_buffer, info);
798 if (!info->reserved) {
801 return EFI_EXIT(EFI_UNSUPPORTED);
804 *image_handle = info;
805 list_add_tail(&obj->link, &efi_obj_list);
807 return EFI_EXIT(EFI_SUCCESS);
810 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
811 unsigned long *exit_data_size,
814 ulong (*entry)(void *image_handle, struct efi_system_table *st);
815 struct efi_loaded_image *info = image_handle;
817 EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
818 entry = info->reserved;
820 efi_is_direct_boot = false;
822 /* call the image! */
823 if (setjmp(&info->exit_jmp)) {
824 /* We returned from the child image */
825 return EFI_EXIT(info->exit_status);
830 entry(image_handle, &systab);
834 /* Should usually never get here */
835 return EFI_EXIT(EFI_SUCCESS);
838 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
839 efi_status_t exit_status, unsigned long exit_data_size,
842 struct efi_loaded_image *loaded_image_info = (void*)image_handle;
844 EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
845 exit_data_size, exit_data);
847 /* Make sure entry/exit counts for EFI world cross-overs match */
851 * But longjmp out with the U-Boot gd, not the application's, as
852 * the other end is a setjmp call inside EFI context.
856 loaded_image_info->exit_status = exit_status;
857 longjmp(&loaded_image_info->exit_jmp, 1);
859 panic("EFI application exited");
862 static struct efi_object *efi_search_obj(void *handle)
864 struct list_head *lhandle;
866 list_for_each(lhandle, &efi_obj_list) {
867 struct efi_object *efiobj;
868 efiobj = list_entry(lhandle, struct efi_object, link);
869 if (efiobj->handle == handle)
876 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
878 struct efi_object *efiobj;
880 EFI_ENTRY("%p", image_handle);
881 efiobj = efi_search_obj(image_handle);
883 list_del(&efiobj->link);
885 return EFI_EXIT(EFI_SUCCESS);
888 static void efi_exit_caches(void)
890 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
892 * Grub on 32bit ARM needs to have caches disabled before jumping into
893 * a zImage, but does not know of all cache layers. Give it a hand.
895 if (efi_is_direct_boot)
896 cleanup_before_linux();
900 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
901 unsigned long map_key)
903 EFI_ENTRY("%p, %ld", image_handle, map_key);
905 board_quiesce_devices();
907 /* Fix up caches for EFI payloads if necessary */
910 /* This stops all lingering devices */
911 bootm_disable_interrupts();
913 /* Give the payload some time to boot */
916 return EFI_EXIT(EFI_SUCCESS);
919 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
921 static uint64_t mono = 0;
922 EFI_ENTRY("%p", count);
924 return EFI_EXIT(EFI_SUCCESS);
927 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
929 EFI_ENTRY("%ld", microseconds);
930 udelay(microseconds);
931 return EFI_EXIT(EFI_SUCCESS);
934 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
935 uint64_t watchdog_code,
936 unsigned long data_size,
937 uint16_t *watchdog_data)
939 EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
940 data_size, watchdog_data);
941 return efi_unsupported(__func__);
944 static efi_status_t EFIAPI efi_connect_controller(
945 efi_handle_t controller_handle,
946 efi_handle_t *driver_image_handle,
947 struct efi_device_path *remain_device_path,
950 EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
951 remain_device_path, recursive);
952 return EFI_EXIT(EFI_NOT_FOUND);
955 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
956 void *driver_image_handle,
959 EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
961 return EFI_EXIT(EFI_INVALID_PARAMETER);
964 static efi_status_t EFIAPI efi_close_protocol(void *handle,
965 efi_guid_t *protocol,
967 void *controller_handle)
969 EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
971 return EFI_EXIT(EFI_NOT_FOUND);
974 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
975 efi_guid_t *protocol,
976 struct efi_open_protocol_info_entry **entry_buffer,
977 unsigned long *entry_count)
979 EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
981 return EFI_EXIT(EFI_NOT_FOUND);
984 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
985 efi_guid_t ***protocol_buffer,
986 unsigned long *protocol_buffer_count)
988 unsigned long buffer_size;
989 struct efi_object *efiobj;
991 struct list_head *lhandle;
994 EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
995 protocol_buffer_count);
997 if (!handle || !protocol_buffer || !protocol_buffer_count)
998 return EFI_EXIT(EFI_INVALID_PARAMETER);
1000 *protocol_buffer = NULL;
1001 *protocol_buffer_count = 0;
1002 list_for_each(lhandle, &efi_obj_list) {
1003 efiobj = list_entry(lhandle, struct efi_object, link);
1005 if (efiobj->handle != handle)
1008 /* Count protocols */
1009 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1010 if (efiobj->protocols[i].guid)
1011 ++*protocol_buffer_count;
1014 if (*protocol_buffer_count) {
1015 buffer_size = sizeof(efi_guid_t *) *
1016 *protocol_buffer_count;
1017 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
1019 (void **)protocol_buffer);
1020 if (r != EFI_SUCCESS)
1023 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
1024 if (efiobj->protocols[i].guid) {
1025 (*protocol_buffer)[j] = (void *)
1026 efiobj->protocols[i].guid;
1034 return EFI_EXIT(EFI_SUCCESS);
1037 static efi_status_t EFIAPI efi_locate_handle_buffer(
1038 enum efi_locate_search_type search_type,
1039 efi_guid_t *protocol, void *search_key,
1040 unsigned long *no_handles, efi_handle_t **buffer)
1043 unsigned long buffer_size = 0;
1045 EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
1046 no_handles, buffer);
1048 if (!no_handles || !buffer) {
1049 r = EFI_INVALID_PARAMETER;
1054 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1056 if (r != EFI_BUFFER_TOO_SMALL)
1058 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1060 if (r != EFI_SUCCESS)
1062 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1064 if (r == EFI_SUCCESS)
1065 *no_handles = buffer_size / sizeof(void *);
1070 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
1072 void **protocol_interface)
1074 struct list_head *lhandle;
1077 EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
1079 if (!protocol || !protocol_interface)
1080 return EFI_EXIT(EFI_INVALID_PARAMETER);
1082 EFI_PRINT_GUID("protocol", protocol);
1084 list_for_each(lhandle, &efi_obj_list) {
1085 struct efi_object *efiobj;
1087 efiobj = list_entry(lhandle, struct efi_object, link);
1088 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1089 struct efi_handler *handler = &efiobj->protocols[i];
1093 if (!guidcmp(handler->guid, protocol)) {
1094 *protocol_interface =
1095 handler->protocol_interface;
1096 return EFI_EXIT(EFI_SUCCESS);
1100 *protocol_interface = NULL;
1102 return EFI_EXIT(EFI_NOT_FOUND);
1105 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
1108 EFI_ENTRY("%p", handle);
1111 efi_guid_t *protocol;
1112 void *protocol_interface;
1113 efi_status_t r = EFI_SUCCESS;
1117 return EFI_EXIT(EFI_INVALID_PARAMETER);
1119 va_start(argptr, handle);
1121 protocol = va_arg(argptr, efi_guid_t*);
1124 protocol_interface = va_arg(argptr, void*);
1125 r = efi_install_protocol_interface(handle, protocol,
1126 EFI_NATIVE_INTERFACE,
1127 protocol_interface);
1128 if (r != EFI_SUCCESS)
1133 if (r == EFI_SUCCESS)
1136 /* If an error occured undo all changes. */
1137 va_start(argptr, handle);
1139 protocol = va_arg(argptr, efi_guid_t*);
1140 protocol_interface = va_arg(argptr, void*);
1141 efi_uninstall_protocol_interface(handle, protocol,
1142 protocol_interface);
1149 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
1152 EFI_ENTRY("%p", handle);
1153 return EFI_EXIT(EFI_INVALID_PARAMETER);
1156 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
1157 unsigned long data_size,
1160 EFI_ENTRY("%p, %ld", data, data_size);
1161 *crc32_p = crc32(0, data, data_size);
1162 return EFI_EXIT(EFI_SUCCESS);
1165 static void EFIAPI efi_copy_mem(void *destination, void *source,
1166 unsigned long length)
1168 EFI_ENTRY("%p, %p, %ld", destination, source, length);
1169 memcpy(destination, source, length);
1172 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
1174 EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
1175 memset(buffer, value, size);
1178 static efi_status_t EFIAPI efi_open_protocol(
1179 void *handle, efi_guid_t *protocol,
1180 void **protocol_interface, void *agent_handle,
1181 void *controller_handle, uint32_t attributes)
1183 struct list_head *lhandle;
1185 efi_status_t r = EFI_INVALID_PARAMETER;
1187 EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
1188 protocol_interface, agent_handle, controller_handle,
1191 if (!handle || !protocol ||
1192 (!protocol_interface && attributes !=
1193 EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
1197 EFI_PRINT_GUID("protocol", protocol);
1199 switch (attributes) {
1200 case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
1201 case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
1202 case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
1204 case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
1205 if (controller_handle == handle)
1207 case EFI_OPEN_PROTOCOL_BY_DRIVER:
1208 case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
1209 if (controller_handle == NULL)
1211 case EFI_OPEN_PROTOCOL_EXCLUSIVE:
1212 if (agent_handle == NULL)
1219 list_for_each(lhandle, &efi_obj_list) {
1220 struct efi_object *efiobj;
1221 efiobj = list_entry(lhandle, struct efi_object, link);
1223 if (efiobj->handle != handle)
1226 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1227 struct efi_handler *handler = &efiobj->protocols[i];
1228 const efi_guid_t *hprotocol = handler->guid;
1231 if (!guidcmp(hprotocol, protocol)) {
1233 EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
1234 *protocol_interface =
1235 handler->protocol_interface;
1245 r = EFI_UNSUPPORTED;
1250 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
1251 efi_guid_t *protocol,
1252 void **protocol_interface)
1254 return efi_open_protocol(handle, protocol, protocol_interface, NULL,
1255 NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
1258 static const struct efi_boot_services efi_boot_services = {
1260 .headersize = sizeof(struct efi_table_hdr),
1262 .raise_tpl = efi_raise_tpl,
1263 .restore_tpl = efi_restore_tpl,
1264 .allocate_pages = efi_allocate_pages_ext,
1265 .free_pages = efi_free_pages_ext,
1266 .get_memory_map = efi_get_memory_map_ext,
1267 .allocate_pool = efi_allocate_pool_ext,
1268 .free_pool = efi_free_pool_ext,
1269 .create_event = efi_create_event_ext,
1270 .set_timer = efi_set_timer_ext,
1271 .wait_for_event = efi_wait_for_event,
1272 .signal_event = efi_signal_event_ext,
1273 .close_event = efi_close_event,
1274 .check_event = efi_check_event,
1275 .install_protocol_interface = efi_install_protocol_interface_ext,
1276 .reinstall_protocol_interface = efi_reinstall_protocol_interface,
1277 .uninstall_protocol_interface = efi_uninstall_protocol_interface_ext,
1278 .handle_protocol = efi_handle_protocol,
1280 .register_protocol_notify = efi_register_protocol_notify,
1281 .locate_handle = efi_locate_handle_ext,
1282 .locate_device_path = efi_locate_device_path,
1283 .install_configuration_table = efi_install_configuration_table_ext,
1284 .load_image = efi_load_image,
1285 .start_image = efi_start_image,
1287 .unload_image = efi_unload_image,
1288 .exit_boot_services = efi_exit_boot_services,
1289 .get_next_monotonic_count = efi_get_next_monotonic_count,
1291 .set_watchdog_timer = efi_set_watchdog_timer,
1292 .connect_controller = efi_connect_controller,
1293 .disconnect_controller = efi_disconnect_controller,
1294 .open_protocol = efi_open_protocol,
1295 .close_protocol = efi_close_protocol,
1296 .open_protocol_information = efi_open_protocol_information,
1297 .protocols_per_handle = efi_protocols_per_handle,
1298 .locate_handle_buffer = efi_locate_handle_buffer,
1299 .locate_protocol = efi_locate_protocol,
1300 .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
1301 .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
1302 .calculate_crc32 = efi_calculate_crc32,
1303 .copy_mem = efi_copy_mem,
1304 .set_mem = efi_set_mem,
1308 static uint16_t __efi_runtime_data firmware_vendor[] =
1309 { 'D','a','s',' ','U','-','b','o','o','t',0 };
1311 struct efi_system_table __efi_runtime_data systab = {
1313 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
1314 .revision = 0x20005, /* 2.5 */
1315 .headersize = sizeof(struct efi_table_hdr),
1317 .fw_vendor = (long)firmware_vendor,
1318 .con_in = (void*)&efi_con_in,
1319 .con_out = (void*)&efi_con_out,
1320 .std_err = (void*)&efi_con_out,
1321 .runtime = (void*)&efi_runtime_services,
1322 .boottime = (void*)&efi_boot_services,
1324 .tables = (void*)efi_conf_table,