1 /*
2 * EFI application boot time services
3 *
4 * Copyright (c) 2016 Alexander Graf
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <efi_loader.h>
11 #include <malloc.h>
12 #include <asm/global_data.h>
13 #include <linux/libfdt_env.h>
14 #include <u-boot/crc.h>
15 #include <bootm.h>
16 #include <inttypes.h>
17 #include <watchdog.h>
18
19 DECLARE_GLOBAL_DATA_PTR;
20
21 /* This list contains all the EFI objects our payload has access to */
22 LIST_HEAD(efi_obj_list);
23
24 /*
25 * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
26 * we need to do trickery with caches. Since we don't want to break the EFI
27 * aware boot path, only apply hacks when loading exiting directly (breaking
28 * direct Linux EFI booting along the way - oh well).
29 */
30 static bool efi_is_direct_boot = true;
31
32 /*
33 * EFI can pass arbitrary additional "tables" containing vendor specific
34 * information to the payload. One such table is the FDT table which contains
35 * a pointer to a flattened device tree blob.
36 *
37 * In most cases we want to pass an FDT to the payload, so reserve one slot of
38 * config table space for it. The pointer gets populated by do_bootefi_exec().
39 */
40 static struct efi_configuration_table __efi_runtime_data efi_conf_table[2];
41
42 #ifdef CONFIG_ARM
43 /*
44 * The "gd" pointer lives in a register on ARM and AArch64 that we declare
45 * fixed when compiling U-Boot. However, the payload does not know about that
46 * restriction so we need to manually swap its and our view of that register on
47 * EFI callback entry/exit.
48 */
49 static volatile void *efi_gd, *app_gd;
50 #endif
51
52 static int entry_count;
53 static int nesting_level;
54
55 /* Called on every callback entry */
__efi_entry_check(void)56 int __efi_entry_check(void)
57 {
58 int ret = entry_count++ == 0;
59 #ifdef CONFIG_ARM
60 assert(efi_gd);
61 app_gd = gd;
62 gd = efi_gd;
63 #endif
64 return ret;
65 }
66
67 /* Called on every callback exit */
__efi_exit_check(void)68 int __efi_exit_check(void)
69 {
70 int ret = --entry_count == 0;
71 #ifdef CONFIG_ARM
72 gd = app_gd;
73 #endif
74 return ret;
75 }
76
77 /* Called from do_bootefi_exec() */
efi_save_gd(void)78 void efi_save_gd(void)
79 {
80 #ifdef CONFIG_ARM
81 efi_gd = gd;
82 #endif
83 }
84
85 /*
86 * Special case handler for error/abort that just forces things back
87 * to u-boot world so we can dump out an abort msg, without any care
88 * about returning back to UEFI world.
89 */
efi_restore_gd(void)90 void efi_restore_gd(void)
91 {
92 #ifdef CONFIG_ARM
93 /* Only restore if we're already in EFI context */
94 if (!efi_gd)
95 return;
96 gd = efi_gd;
97 #endif
98 }
99
100 /*
101 * Two spaces per indent level, maxing out at 10.. which ought to be
102 * enough for anyone ;-)
103 */
indent_string(int level)104 static const char *indent_string(int level)
105 {
106 const char *indent = " ";
107 const int max = strlen(indent);
108 level = min(max, level * 2);
109 return &indent[max - level];
110 }
111
__efi_nesting_inc(void)112 const char *__efi_nesting_inc(void)
113 {
114 return indent_string(nesting_level++);
115 }
116
__efi_nesting_dec(void)117 const char *__efi_nesting_dec(void)
118 {
119 return indent_string(--nesting_level);
120 }
121
122 /* Low 32 bit */
123 #define EFI_LOW32(a) (a & 0xFFFFFFFFULL)
124 /* High 32 bit */
125 #define EFI_HIGH32(a) (a >> 32)
126
127 /*
128 * 64bit division by 10 implemented as multiplication by 1 / 10
129 *
130 * Decimals of one tenth: 0x1 / 0xA = 0x0.19999...
131 */
132 #define EFI_TENTH 0x199999999999999A
efi_div10(u64 a)133 static u64 efi_div10(u64 a)
134 {
135 u64 prod;
136 u64 rem;
137 u64 ret;
138
139 ret = EFI_HIGH32(a) * EFI_HIGH32(EFI_TENTH);
140 prod = EFI_HIGH32(a) * EFI_LOW32(EFI_TENTH);
141 rem = EFI_LOW32(prod);
142 ret += EFI_HIGH32(prod);
143 prod = EFI_LOW32(a) * EFI_HIGH32(EFI_TENTH);
144 rem += EFI_LOW32(prod);
145 ret += EFI_HIGH32(prod);
146 prod = EFI_LOW32(a) * EFI_LOW32(EFI_TENTH);
147 rem += EFI_HIGH32(prod);
148 ret += EFI_HIGH32(rem);
149 /* Round to nearest integer */
150 if (rem >= (1 << 31))
151 ++ret;
152 return ret;
153 }
154
efi_signal_event(struct efi_event * event)155 void efi_signal_event(struct efi_event *event)
156 {
157 if (event->signaled)
158 return;
159 event->signaled = 1;
160 if (event->type & EVT_NOTIFY_SIGNAL) {
161 EFI_CALL(event->notify_function(event, event->notify_context));
162 }
163 }
164
efi_unsupported(const char * funcname)165 static efi_status_t efi_unsupported(const char *funcname)
166 {
167 debug("EFI: App called into unimplemented function %s\n", funcname);
168 return EFI_EXIT(EFI_UNSUPPORTED);
169 }
170
efi_raise_tpl(UINTN new_tpl)171 static unsigned long EFIAPI efi_raise_tpl(UINTN new_tpl)
172 {
173 EFI_ENTRY("0x%zx", new_tpl);
174 return EFI_EXIT(0);
175 }
176
efi_restore_tpl(UINTN old_tpl)177 static void EFIAPI efi_restore_tpl(UINTN old_tpl)
178 {
179 EFI_ENTRY("0x%zx", old_tpl);
180 efi_unsupported(__func__);
181 }
182
efi_allocate_pages_ext(int type,int memory_type,unsigned long pages,uint64_t * memory)183 static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
184 unsigned long pages,
185 uint64_t *memory)
186 {
187 efi_status_t r;
188
189 EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
190 r = efi_allocate_pages(type, memory_type, pages, memory);
191 return EFI_EXIT(r);
192 }
193
efi_free_pages_ext(uint64_t memory,unsigned long pages)194 static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
195 unsigned long pages)
196 {
197 efi_status_t r;
198
199 EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
200 r = efi_free_pages(memory, pages);
201 return EFI_EXIT(r);
202 }
203
efi_get_memory_map_ext(unsigned long * memory_map_size,struct efi_mem_desc * memory_map,unsigned long * map_key,unsigned long * descriptor_size,uint32_t * descriptor_version)204 static efi_status_t EFIAPI efi_get_memory_map_ext(
205 unsigned long *memory_map_size,
206 struct efi_mem_desc *memory_map,
207 unsigned long *map_key,
208 unsigned long *descriptor_size,
209 uint32_t *descriptor_version)
210 {
211 efi_status_t r;
212
213 EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
214 map_key, descriptor_size, descriptor_version);
215 r = efi_get_memory_map(memory_map_size, memory_map, map_key,
216 descriptor_size, descriptor_version);
217 return EFI_EXIT(r);
218 }
219
efi_allocate_pool_ext(int pool_type,unsigned long size,void ** buffer)220 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
221 unsigned long size,
222 void **buffer)
223 {
224 efi_status_t r;
225
226 EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
227 r = efi_allocate_pool(pool_type, size, buffer);
228 return EFI_EXIT(r);
229 }
230
efi_free_pool_ext(void * buffer)231 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
232 {
233 efi_status_t r;
234
235 EFI_ENTRY("%p", buffer);
236 r = efi_free_pool(buffer);
237 return EFI_EXIT(r);
238 }
239
240 /*
241 * Our event capabilities are very limited. Only a small limited
242 * number of events is allowed to coexist.
243 */
244 static struct efi_event efi_events[16];
245
efi_create_event(uint32_t type,UINTN notify_tpl,void (EFIAPI * notify_function)(struct efi_event * event,void * context),void * notify_context,struct efi_event ** event)246 efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
247 void (EFIAPI *notify_function) (
248 struct efi_event *event,
249 void *context),
250 void *notify_context, struct efi_event **event)
251 {
252 int i;
253
254 if (event == NULL)
255 return EFI_INVALID_PARAMETER;
256
257 if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
258 return EFI_INVALID_PARAMETER;
259
260 if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
261 notify_function == NULL)
262 return EFI_INVALID_PARAMETER;
263
264 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
265 if (efi_events[i].type)
266 continue;
267 efi_events[i].type = type;
268 efi_events[i].notify_tpl = notify_tpl;
269 efi_events[i].notify_function = notify_function;
270 efi_events[i].notify_context = notify_context;
271 /* Disable timers on bootup */
272 efi_events[i].trigger_next = -1ULL;
273 efi_events[i].signaled = 0;
274 *event = &efi_events[i];
275 return EFI_SUCCESS;
276 }
277 return EFI_OUT_OF_RESOURCES;
278 }
279
efi_create_event_ext(uint32_t type,UINTN notify_tpl,void (EFIAPI * notify_function)(struct efi_event * event,void * context),void * notify_context,struct efi_event ** event)280 static efi_status_t EFIAPI efi_create_event_ext(
281 uint32_t type, UINTN notify_tpl,
282 void (EFIAPI *notify_function) (
283 struct efi_event *event,
284 void *context),
285 void *notify_context, struct efi_event **event)
286 {
287 EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
288 notify_context);
289 return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
290 notify_context, event));
291 }
292
293
294 /*
295 * Our timers have to work without interrupts, so we check whenever keyboard
296 * input or disk accesses happen if enough time elapsed for it to fire.
297 */
efi_timer_check(void)298 void efi_timer_check(void)
299 {
300 int i;
301 u64 now = timer_get_us();
302
303 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
304 if (!efi_events[i].type ||
305 !(efi_events[i].type & EVT_TIMER) ||
306 efi_events[i].trigger_type == EFI_TIMER_STOP ||
307 now < efi_events[i].trigger_next)
308 continue;
309 if (efi_events[i].trigger_type == EFI_TIMER_PERIODIC) {
310 efi_events[i].trigger_next +=
311 efi_events[i].trigger_time;
312 efi_events[i].signaled = 0;
313 }
314 efi_signal_event(&efi_events[i]);
315 }
316 WATCHDOG_RESET();
317 }
318
efi_set_timer(struct efi_event * event,enum efi_timer_delay type,uint64_t trigger_time)319 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
320 uint64_t trigger_time)
321 {
322 int i;
323
324 /*
325 * The parameter defines a multiple of 100ns.
326 * We use multiples of 1000ns. So divide by 10.
327 */
328 trigger_time = efi_div10(trigger_time);
329
330 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
331 if (event != &efi_events[i])
332 continue;
333
334 if (!(event->type & EVT_TIMER))
335 break;
336 switch (type) {
337 case EFI_TIMER_STOP:
338 event->trigger_next = -1ULL;
339 break;
340 case EFI_TIMER_PERIODIC:
341 case EFI_TIMER_RELATIVE:
342 event->trigger_next =
343 timer_get_us() + trigger_time;
344 break;
345 default:
346 return EFI_INVALID_PARAMETER;
347 }
348 event->trigger_type = type;
349 event->trigger_time = trigger_time;
350 return EFI_SUCCESS;
351 }
352 return EFI_INVALID_PARAMETER;
353 }
354
efi_set_timer_ext(struct efi_event * event,enum efi_timer_delay type,uint64_t trigger_time)355 static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
356 enum efi_timer_delay type,
357 uint64_t trigger_time)
358 {
359 EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
360 return EFI_EXIT(efi_set_timer(event, type, trigger_time));
361 }
362
efi_wait_for_event(unsigned long num_events,struct efi_event ** event,unsigned long * index)363 static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
364 struct efi_event **event,
365 unsigned long *index)
366 {
367 int i, j;
368
369 EFI_ENTRY("%ld, %p, %p", num_events, event, index);
370
371 /* Check parameters */
372 if (!num_events || !event)
373 return EFI_EXIT(EFI_INVALID_PARAMETER);
374 for (i = 0; i < num_events; ++i) {
375 for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
376 if (event[i] == &efi_events[j])
377 goto known_event;
378 }
379 return EFI_EXIT(EFI_INVALID_PARAMETER);
380 known_event:
381 if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
382 return EFI_EXIT(EFI_INVALID_PARAMETER);
383 }
384
385 /* Wait for signal */
386 for (;;) {
387 for (i = 0; i < num_events; ++i) {
388 if (event[i]->signaled)
389 goto out;
390 }
391 /* Allow events to occur. */
392 efi_timer_check();
393 }
394
395 out:
396 /*
397 * Reset the signal which is passed to the caller to allow periodic
398 * events to occur.
399 */
400 event[i]->signaled = 0;
401 if (index)
402 *index = i;
403
404 return EFI_EXIT(EFI_SUCCESS);
405 }
406
efi_signal_event_ext(struct efi_event * event)407 static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
408 {
409 int i;
410
411 EFI_ENTRY("%p", event);
412 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
413 if (event != &efi_events[i])
414 continue;
415 efi_signal_event(event);
416 break;
417 }
418 return EFI_EXIT(EFI_SUCCESS);
419 }
420
efi_close_event(struct efi_event * event)421 static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
422 {
423 int i;
424
425 EFI_ENTRY("%p", event);
426 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
427 if (event == &efi_events[i]) {
428 event->type = 0;
429 event->trigger_next = -1ULL;
430 event->signaled = 0;
431 return EFI_EXIT(EFI_SUCCESS);
432 }
433 }
434 return EFI_EXIT(EFI_INVALID_PARAMETER);
435 }
436
efi_check_event(struct efi_event * event)437 static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
438 {
439 int i;
440
441 EFI_ENTRY("%p", event);
442 efi_timer_check();
443 for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
444 if (event != &efi_events[i])
445 continue;
446 if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
447 break;
448 if (event->signaled)
449 return EFI_EXIT(EFI_SUCCESS);
450 return EFI_EXIT(EFI_NOT_READY);
451 }
452 return EFI_EXIT(EFI_INVALID_PARAMETER);
453 }
454
efi_install_protocol_interface(void ** handle,efi_guid_t * protocol,int protocol_interface_type,void * protocol_interface)455 static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
456 efi_guid_t *protocol, int protocol_interface_type,
457 void *protocol_interface)
458 {
459 struct list_head *lhandle;
460 int i;
461 efi_status_t r;
462
463 if (!handle || !protocol ||
464 protocol_interface_type != EFI_NATIVE_INTERFACE) {
465 r = EFI_INVALID_PARAMETER;
466 goto out;
467 }
468
469 /* Create new handle if requested. */
470 if (!*handle) {
471 r = EFI_OUT_OF_RESOURCES;
472 goto out;
473 }
474 /* Find object. */
475 list_for_each(lhandle, &efi_obj_list) {
476 struct efi_object *efiobj;
477 efiobj = list_entry(lhandle, struct efi_object, link);
478
479 if (efiobj->handle != *handle)
480 continue;
481 /* Check if protocol is already installed on the handle. */
482 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
483 struct efi_handler *handler = &efiobj->protocols[i];
484
485 if (!handler->guid)
486 continue;
487 if (!guidcmp(handler->guid, protocol)) {
488 r = EFI_INVALID_PARAMETER;
489 goto out;
490 }
491 }
492 /* Install protocol in first empty slot. */
493 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
494 struct efi_handler *handler = &efiobj->protocols[i];
495
496 if (handler->guid)
497 continue;
498
499 handler->guid = protocol;
500 handler->protocol_interface = protocol_interface;
501 r = EFI_SUCCESS;
502 goto out;
503 }
504 r = EFI_OUT_OF_RESOURCES;
505 goto out;
506 }
507 r = EFI_INVALID_PARAMETER;
508 out:
509 return r;
510 }
511
efi_install_protocol_interface_ext(void ** handle,efi_guid_t * protocol,int protocol_interface_type,void * protocol_interface)512 static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
513 efi_guid_t *protocol, int protocol_interface_type,
514 void *protocol_interface)
515 {
516 EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
517 protocol_interface);
518
519 return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
520 protocol_interface_type,
521 protocol_interface));
522 }
523
efi_reinstall_protocol_interface(void * handle,efi_guid_t * protocol,void * old_interface,void * new_interface)524 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
525 efi_guid_t *protocol, void *old_interface,
526 void *new_interface)
527 {
528 EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
529 new_interface);
530 return EFI_EXIT(EFI_ACCESS_DENIED);
531 }
532
efi_uninstall_protocol_interface(void * handle,efi_guid_t * protocol,void * protocol_interface)533 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
534 efi_guid_t *protocol, void *protocol_interface)
535 {
536 struct list_head *lhandle;
537 int i;
538 efi_status_t r = EFI_NOT_FOUND;
539
540 if (!handle || !protocol) {
541 r = EFI_INVALID_PARAMETER;
542 goto out;
543 }
544
545 list_for_each(lhandle, &efi_obj_list) {
546 struct efi_object *efiobj;
547 efiobj = list_entry(lhandle, struct efi_object, link);
548
549 if (efiobj->handle != handle)
550 continue;
551
552 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
553 struct efi_handler *handler = &efiobj->protocols[i];
554 const efi_guid_t *hprotocol = handler->guid;
555
556 if (!hprotocol)
557 continue;
558 if (!guidcmp(hprotocol, protocol)) {
559 if (handler->protocol_interface) {
560 r = EFI_ACCESS_DENIED;
561 } else {
562 handler->guid = 0;
563 r = EFI_SUCCESS;
564 }
565 goto out;
566 }
567 }
568 }
569
570 out:
571 return r;
572 }
573
efi_uninstall_protocol_interface_ext(void * handle,efi_guid_t * protocol,void * protocol_interface)574 static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
575 efi_guid_t *protocol, void *protocol_interface)
576 {
577 EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
578
579 return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
580 protocol_interface));
581 }
582
efi_register_protocol_notify(efi_guid_t * protocol,struct efi_event * event,void ** registration)583 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
584 struct efi_event *event,
585 void **registration)
586 {
587 EFI_ENTRY("%p, %p, %p", protocol, event, registration);
588 return EFI_EXIT(EFI_OUT_OF_RESOURCES);
589 }
590
efi_search(enum efi_locate_search_type search_type,efi_guid_t * protocol,void * search_key,struct efi_object * efiobj)591 static int efi_search(enum efi_locate_search_type search_type,
592 efi_guid_t *protocol, void *search_key,
593 struct efi_object *efiobj)
594 {
595 int i;
596
597 switch (search_type) {
598 case all_handles:
599 return 0;
600 case by_register_notify:
601 return -1;
602 case by_protocol:
603 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
604 const efi_guid_t *guid = efiobj->protocols[i].guid;
605 if (guid && !guidcmp(guid, protocol))
606 return 0;
607 }
608 return -1;
609 }
610
611 return -1;
612 }
613
efi_locate_handle(enum efi_locate_search_type search_type,efi_guid_t * protocol,void * search_key,unsigned long * buffer_size,efi_handle_t * buffer)614 static efi_status_t efi_locate_handle(
615 enum efi_locate_search_type search_type,
616 efi_guid_t *protocol, void *search_key,
617 unsigned long *buffer_size, efi_handle_t *buffer)
618 {
619 struct list_head *lhandle;
620 unsigned long size = 0;
621
622 /* Count how much space we need */
623 list_for_each(lhandle, &efi_obj_list) {
624 struct efi_object *efiobj;
625 efiobj = list_entry(lhandle, struct efi_object, link);
626 if (!efi_search(search_type, protocol, search_key, efiobj)) {
627 size += sizeof(void*);
628 }
629 }
630
631 if (*buffer_size < size) {
632 *buffer_size = size;
633 return EFI_BUFFER_TOO_SMALL;
634 }
635
636 *buffer_size = size;
637 if (size == 0)
638 return EFI_NOT_FOUND;
639
640 /* Then fill the array */
641 list_for_each(lhandle, &efi_obj_list) {
642 struct efi_object *efiobj;
643 efiobj = list_entry(lhandle, struct efi_object, link);
644 if (!efi_search(search_type, protocol, search_key, efiobj)) {
645 *(buffer++) = efiobj->handle;
646 }
647 }
648
649 return EFI_SUCCESS;
650 }
651
efi_locate_handle_ext(enum efi_locate_search_type search_type,efi_guid_t * protocol,void * search_key,unsigned long * buffer_size,efi_handle_t * buffer)652 static efi_status_t EFIAPI efi_locate_handle_ext(
653 enum efi_locate_search_type search_type,
654 efi_guid_t *protocol, void *search_key,
655 unsigned long *buffer_size, efi_handle_t *buffer)
656 {
657 EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
658 buffer_size, buffer);
659
660 return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
661 buffer_size, buffer));
662 }
663
efi_locate_device_path(efi_guid_t * protocol,struct efi_device_path ** device_path,efi_handle_t * device)664 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
665 struct efi_device_path **device_path,
666 efi_handle_t *device)
667 {
668 struct efi_object *efiobj;
669
670 EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
671
672 efiobj = efi_dp_find_obj(*device_path, device_path);
673 if (!efiobj)
674 return EFI_EXIT(EFI_NOT_FOUND);
675
676 *device = efiobj->handle;
677
678 return EFI_EXIT(EFI_SUCCESS);
679 }
680
681 /* Collapses configuration table entries, removing index i */
efi_remove_configuration_table(int i)682 static void efi_remove_configuration_table(int i)
683 {
684 struct efi_configuration_table *this = &efi_conf_table[i];
685 struct efi_configuration_table *next = &efi_conf_table[i+1];
686 struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
687
688 memmove(this, next, (ulong)end - (ulong)next);
689 systab.nr_tables--;
690 }
691
efi_install_configuration_table(const efi_guid_t * guid,void * table)692 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
693 {
694 int i;
695
696 /* Check for guid override */
697 for (i = 0; i < systab.nr_tables; i++) {
698 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
699 if (table)
700 efi_conf_table[i].table = table;
701 else
702 efi_remove_configuration_table(i);
703 return EFI_SUCCESS;
704 }
705 }
706
707 if (!table)
708 return EFI_NOT_FOUND;
709
710 /* No override, check for overflow */
711 if (i >= ARRAY_SIZE(efi_conf_table))
712 return EFI_OUT_OF_RESOURCES;
713
714 /* Add a new entry */
715 memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
716 efi_conf_table[i].table = table;
717 systab.nr_tables = i + 1;
718
719 return EFI_SUCCESS;
720 }
721
efi_install_configuration_table_ext(efi_guid_t * guid,void * table)722 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
723 void *table)
724 {
725 EFI_ENTRY("%p, %p", guid, table);
726 return EFI_EXIT(efi_install_configuration_table(guid, table));
727 }
728
729 /* Initialize a loaded_image_info + loaded_image_info object with correct
730 * protocols, boot-device, etc.
731 */
efi_setup_loaded_image(struct efi_loaded_image * info,struct efi_object * obj,struct efi_device_path * device_path,struct efi_device_path * file_path)732 void efi_setup_loaded_image(struct efi_loaded_image *info, struct efi_object *obj,
733 struct efi_device_path *device_path,
734 struct efi_device_path *file_path)
735 {
736 obj->handle = info;
737
738 /*
739 * When asking for the device path interface, return
740 * bootefi_device_path
741 */
742 obj->protocols[0].guid = &efi_guid_device_path;
743 obj->protocols[0].protocol_interface = device_path;
744
745 /*
746 * When asking for the loaded_image interface, just
747 * return handle which points to loaded_image_info
748 */
749 obj->protocols[1].guid = &efi_guid_loaded_image;
750 obj->protocols[1].protocol_interface = info;
751
752 obj->protocols[2].guid = &efi_guid_console_control;
753 obj->protocols[2].protocol_interface = (void *)&efi_console_control;
754
755 obj->protocols[3].guid = &efi_guid_device_path_to_text_protocol;
756 obj->protocols[3].protocol_interface =
757 (void *)&efi_device_path_to_text;
758
759 info->file_path = file_path;
760 info->device_handle = efi_dp_find_obj(device_path, NULL);
761
762 list_add_tail(&obj->link, &efi_obj_list);
763 }
764
efi_load_image(bool boot_policy,efi_handle_t parent_image,struct efi_device_path * file_path,void * source_buffer,unsigned long source_size,efi_handle_t * image_handle)765 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
766 efi_handle_t parent_image,
767 struct efi_device_path *file_path,
768 void *source_buffer,
769 unsigned long source_size,
770 efi_handle_t *image_handle)
771 {
772 static struct efi_object loaded_image_info_obj = {
773 .protocols = {
774 {
775 .guid = &efi_guid_loaded_image,
776 },
777 },
778 };
779 struct efi_loaded_image *info;
780 struct efi_object *obj;
781
782 EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
783 file_path, source_buffer, source_size, image_handle);
784 info = malloc(sizeof(*info));
785 loaded_image_info_obj.protocols[0].protocol_interface = info;
786 obj = malloc(sizeof(loaded_image_info_obj));
787 memset(info, 0, sizeof(*info));
788 memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
789 obj->handle = info;
790 info->file_path = file_path;
791 info->reserved = efi_load_pe(source_buffer, info);
792 if (!info->reserved) {
793 free(info);
794 free(obj);
795 return EFI_EXIT(EFI_UNSUPPORTED);
796 }
797
798 *image_handle = info;
799 list_add_tail(&obj->link, &efi_obj_list);
800
801 return EFI_EXIT(EFI_SUCCESS);
802 }
803
efi_start_image(efi_handle_t image_handle,unsigned long * exit_data_size,s16 ** exit_data)804 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
805 unsigned long *exit_data_size,
806 s16 **exit_data)
807 {
808 ulong (*entry)(void *image_handle, struct efi_system_table *st);
809 struct efi_loaded_image *info = image_handle;
810
811 EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
812 entry = info->reserved;
813
814 efi_is_direct_boot = false;
815
816 /* call the image! */
817 if (setjmp(&info->exit_jmp)) {
818 /* We returned from the child image */
819 return EFI_EXIT(info->exit_status);
820 }
821
822 __efi_nesting_dec();
823 __efi_exit_check();
824 entry(image_handle, &systab);
825 __efi_entry_check();
826 __efi_nesting_inc();
827
828 /* Should usually never get here */
829 return EFI_EXIT(EFI_SUCCESS);
830 }
831
efi_exit(efi_handle_t image_handle,efi_status_t exit_status,unsigned long exit_data_size,int16_t * exit_data)832 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
833 efi_status_t exit_status, unsigned long exit_data_size,
834 int16_t *exit_data)
835 {
836 struct efi_loaded_image *loaded_image_info = (void*)image_handle;
837
838 EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
839 exit_data_size, exit_data);
840
841 loaded_image_info->exit_status = exit_status;
842 longjmp(&loaded_image_info->exit_jmp, 1);
843
844 panic("EFI application exited");
845 }
846
efi_search_obj(void * handle)847 static struct efi_object *efi_search_obj(void *handle)
848 {
849 struct list_head *lhandle;
850
851 list_for_each(lhandle, &efi_obj_list) {
852 struct efi_object *efiobj;
853 efiobj = list_entry(lhandle, struct efi_object, link);
854 if (efiobj->handle == handle)
855 return efiobj;
856 }
857
858 return NULL;
859 }
860
efi_unload_image(void * image_handle)861 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
862 {
863 struct efi_object *efiobj;
864
865 EFI_ENTRY("%p", image_handle);
866 efiobj = efi_search_obj(image_handle);
867 if (efiobj)
868 list_del(&efiobj->link);
869
870 return EFI_EXIT(EFI_SUCCESS);
871 }
872
efi_exit_caches(void)873 static void efi_exit_caches(void)
874 {
875 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
876 /*
877 * Grub on 32bit ARM needs to have caches disabled before jumping into
878 * a zImage, but does not know of all cache layers. Give it a hand.
879 */
880 if (efi_is_direct_boot)
881 cleanup_before_linux();
882 #endif
883 }
884
efi_exit_boot_services(void * image_handle,unsigned long map_key)885 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
886 unsigned long map_key)
887 {
888 EFI_ENTRY("%p, %ld", image_handle, map_key);
889
890 board_quiesce_devices(NULL);
891
892 /* Fix up caches for EFI payloads if necessary */
893 efi_exit_caches();
894
895 /* This stops all lingering devices */
896 bootm_disable_interrupts();
897
898 /* Give the payload some time to boot */
899 WATCHDOG_RESET();
900
901 return EFI_EXIT(EFI_SUCCESS);
902 }
903
efi_get_next_monotonic_count(uint64_t * count)904 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
905 {
906 static uint64_t mono = 0;
907 EFI_ENTRY("%p", count);
908 *count = mono++;
909 return EFI_EXIT(EFI_SUCCESS);
910 }
911
efi_stall(unsigned long microseconds)912 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
913 {
914 EFI_ENTRY("%ld", microseconds);
915 udelay(microseconds);
916 return EFI_EXIT(EFI_SUCCESS);
917 }
918
efi_set_watchdog_timer(unsigned long timeout,uint64_t watchdog_code,unsigned long data_size,uint16_t * watchdog_data)919 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
920 uint64_t watchdog_code,
921 unsigned long data_size,
922 uint16_t *watchdog_data)
923 {
924 EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
925 data_size, watchdog_data);
926 return efi_unsupported(__func__);
927 }
928
efi_connect_controller(efi_handle_t controller_handle,efi_handle_t * driver_image_handle,struct efi_device_path * remain_device_path,bool recursive)929 static efi_status_t EFIAPI efi_connect_controller(
930 efi_handle_t controller_handle,
931 efi_handle_t *driver_image_handle,
932 struct efi_device_path *remain_device_path,
933 bool recursive)
934 {
935 EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
936 remain_device_path, recursive);
937 return EFI_EXIT(EFI_NOT_FOUND);
938 }
939
efi_disconnect_controller(void * controller_handle,void * driver_image_handle,void * child_handle)940 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
941 void *driver_image_handle,
942 void *child_handle)
943 {
944 EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
945 child_handle);
946 return EFI_EXIT(EFI_INVALID_PARAMETER);
947 }
948
efi_close_protocol(void * handle,efi_guid_t * protocol,void * agent_handle,void * controller_handle)949 static efi_status_t EFIAPI efi_close_protocol(void *handle,
950 efi_guid_t *protocol,
951 void *agent_handle,
952 void *controller_handle)
953 {
954 EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
955 controller_handle);
956 return EFI_EXIT(EFI_NOT_FOUND);
957 }
958
efi_open_protocol_information(efi_handle_t handle,efi_guid_t * protocol,struct efi_open_protocol_info_entry ** entry_buffer,unsigned long * entry_count)959 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
960 efi_guid_t *protocol,
961 struct efi_open_protocol_info_entry **entry_buffer,
962 unsigned long *entry_count)
963 {
964 EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
965 entry_count);
966 return EFI_EXIT(EFI_NOT_FOUND);
967 }
968
efi_protocols_per_handle(void * handle,efi_guid_t *** protocol_buffer,unsigned long * protocol_buffer_count)969 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
970 efi_guid_t ***protocol_buffer,
971 unsigned long *protocol_buffer_count)
972 {
973 unsigned long buffer_size;
974 struct efi_object *efiobj;
975 unsigned long i, j;
976 struct list_head *lhandle;
977 efi_status_t r;
978
979 EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
980 protocol_buffer_count);
981
982 if (!handle || !protocol_buffer || !protocol_buffer_count)
983 return EFI_EXIT(EFI_INVALID_PARAMETER);
984
985 *protocol_buffer = NULL;
986 *protocol_buffer_count = 0;
987 list_for_each(lhandle, &efi_obj_list) {
988 efiobj = list_entry(lhandle, struct efi_object, link);
989
990 if (efiobj->handle != handle)
991 continue;
992
993 /* Count protocols */
994 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
995 if (efiobj->protocols[i].guid)
996 ++*protocol_buffer_count;
997 }
998 /* Copy guids */
999 if (*protocol_buffer_count) {
1000 buffer_size = sizeof(efi_guid_t *) *
1001 *protocol_buffer_count;
1002 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
1003 buffer_size,
1004 (void **)protocol_buffer);
1005 if (r != EFI_SUCCESS)
1006 return EFI_EXIT(r);
1007 j = 0;
1008 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
1009 if (efiobj->protocols[i].guid) {
1010 (*protocol_buffer)[j] = (void *)
1011 efiobj->protocols[i].guid;
1012 ++j;
1013 }
1014 }
1015 }
1016 break;
1017 }
1018
1019 return EFI_EXIT(EFI_SUCCESS);
1020 }
1021
efi_locate_handle_buffer(enum efi_locate_search_type search_type,efi_guid_t * protocol,void * search_key,unsigned long * no_handles,efi_handle_t ** buffer)1022 static efi_status_t EFIAPI efi_locate_handle_buffer(
1023 enum efi_locate_search_type search_type,
1024 efi_guid_t *protocol, void *search_key,
1025 unsigned long *no_handles, efi_handle_t **buffer)
1026 {
1027 efi_status_t r;
1028 unsigned long buffer_size = 0;
1029
1030 EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
1031 no_handles, buffer);
1032
1033 if (!no_handles || !buffer) {
1034 r = EFI_INVALID_PARAMETER;
1035 goto out;
1036 }
1037 *no_handles = 0;
1038 *buffer = NULL;
1039 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1040 *buffer);
1041 if (r != EFI_BUFFER_TOO_SMALL)
1042 goto out;
1043 r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1044 (void **)buffer);
1045 if (r != EFI_SUCCESS)
1046 goto out;
1047 r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1048 *buffer);
1049 if (r == EFI_SUCCESS)
1050 *no_handles = buffer_size / sizeof(void *);
1051 out:
1052 return EFI_EXIT(r);
1053 }
1054
efi_locate_protocol(efi_guid_t * protocol,void * registration,void ** protocol_interface)1055 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
1056 void *registration,
1057 void **protocol_interface)
1058 {
1059 struct list_head *lhandle;
1060 int i;
1061
1062 EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
1063
1064 if (!protocol || !protocol_interface)
1065 return EFI_EXIT(EFI_INVALID_PARAMETER);
1066
1067 list_for_each(lhandle, &efi_obj_list) {
1068 struct efi_object *efiobj;
1069
1070 efiobj = list_entry(lhandle, struct efi_object, link);
1071 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1072 struct efi_handler *handler = &efiobj->protocols[i];
1073
1074 if (!handler->guid)
1075 continue;
1076 if (!guidcmp(handler->guid, protocol)) {
1077 *protocol_interface =
1078 handler->protocol_interface;
1079 return EFI_EXIT(EFI_SUCCESS);
1080 }
1081 }
1082 }
1083 *protocol_interface = NULL;
1084
1085 return EFI_EXIT(EFI_NOT_FOUND);
1086 }
1087
efi_install_multiple_protocol_interfaces(void ** handle,...)1088 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
1089 void **handle, ...)
1090 {
1091 EFI_ENTRY("%p", handle);
1092
1093 va_list argptr;
1094 efi_guid_t *protocol;
1095 void *protocol_interface;
1096 efi_status_t r = EFI_SUCCESS;
1097 int i = 0;
1098
1099 if (!handle)
1100 return EFI_EXIT(EFI_INVALID_PARAMETER);
1101
1102 va_start(argptr, handle);
1103 for (;;) {
1104 protocol = va_arg(argptr, efi_guid_t*);
1105 if (!protocol)
1106 break;
1107 protocol_interface = va_arg(argptr, void*);
1108 r = efi_install_protocol_interface(handle, protocol,
1109 EFI_NATIVE_INTERFACE,
1110 protocol_interface);
1111 if (r != EFI_SUCCESS)
1112 break;
1113 i++;
1114 }
1115 va_end(argptr);
1116 if (r == EFI_SUCCESS)
1117 return EFI_EXIT(r);
1118
1119 /* If an error occured undo all changes. */
1120 va_start(argptr, handle);
1121 for (; i; --i) {
1122 protocol = va_arg(argptr, efi_guid_t*);
1123 protocol_interface = va_arg(argptr, void*);
1124 efi_uninstall_protocol_interface(handle, protocol,
1125 protocol_interface);
1126 }
1127 va_end(argptr);
1128
1129 return EFI_EXIT(r);
1130 }
1131
efi_uninstall_multiple_protocol_interfaces(void * handle,...)1132 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
1133 void *handle, ...)
1134 {
1135 EFI_ENTRY("%p", handle);
1136 return EFI_EXIT(EFI_INVALID_PARAMETER);
1137 }
1138
efi_calculate_crc32(void * data,unsigned long data_size,uint32_t * crc32_p)1139 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
1140 unsigned long data_size,
1141 uint32_t *crc32_p)
1142 {
1143 EFI_ENTRY("%p, %ld", data, data_size);
1144 *crc32_p = crc32(0, data, data_size);
1145 return EFI_EXIT(EFI_SUCCESS);
1146 }
1147
efi_copy_mem(void * destination,void * source,unsigned long length)1148 static void EFIAPI efi_copy_mem(void *destination, void *source,
1149 unsigned long length)
1150 {
1151 EFI_ENTRY("%p, %p, %ld", destination, source, length);
1152 memcpy(destination, source, length);
1153 }
1154
efi_set_mem(void * buffer,unsigned long size,uint8_t value)1155 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
1156 {
1157 EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
1158 memset(buffer, value, size);
1159 }
1160
efi_open_protocol(void * handle,efi_guid_t * protocol,void ** protocol_interface,void * agent_handle,void * controller_handle,uint32_t attributes)1161 static efi_status_t EFIAPI efi_open_protocol(
1162 void *handle, efi_guid_t *protocol,
1163 void **protocol_interface, void *agent_handle,
1164 void *controller_handle, uint32_t attributes)
1165 {
1166 struct list_head *lhandle;
1167 int i;
1168 efi_status_t r = EFI_INVALID_PARAMETER;
1169
1170 EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
1171 protocol_interface, agent_handle, controller_handle,
1172 attributes);
1173
1174 if (!handle || !protocol ||
1175 (!protocol_interface && attributes !=
1176 EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
1177 goto out;
1178 }
1179
1180 switch (attributes) {
1181 case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
1182 case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
1183 case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
1184 break;
1185 case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
1186 if (controller_handle == handle)
1187 goto out;
1188 case EFI_OPEN_PROTOCOL_BY_DRIVER:
1189 case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
1190 if (controller_handle == NULL)
1191 goto out;
1192 case EFI_OPEN_PROTOCOL_EXCLUSIVE:
1193 if (agent_handle == NULL)
1194 goto out;
1195 break;
1196 default:
1197 goto out;
1198 }
1199
1200 list_for_each(lhandle, &efi_obj_list) {
1201 struct efi_object *efiobj;
1202 efiobj = list_entry(lhandle, struct efi_object, link);
1203
1204 if (efiobj->handle != handle)
1205 continue;
1206
1207 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1208 struct efi_handler *handler = &efiobj->protocols[i];
1209 const efi_guid_t *hprotocol = handler->guid;
1210 if (!hprotocol)
1211 continue;
1212 if (!guidcmp(hprotocol, protocol)) {
1213 if (attributes !=
1214 EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
1215 *protocol_interface =
1216 handler->protocol_interface;
1217 }
1218 r = EFI_SUCCESS;
1219 goto out;
1220 }
1221 }
1222 goto unsupported;
1223 }
1224
1225 unsupported:
1226 r = EFI_UNSUPPORTED;
1227 out:
1228 return EFI_EXIT(r);
1229 }
1230
efi_handle_protocol(void * handle,efi_guid_t * protocol,void ** protocol_interface)1231 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
1232 efi_guid_t *protocol,
1233 void **protocol_interface)
1234 {
1235 return efi_open_protocol(handle, protocol, protocol_interface, NULL,
1236 NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
1237 }
1238
1239 static const struct efi_boot_services efi_boot_services = {
1240 .hdr = {
1241 .headersize = sizeof(struct efi_table_hdr),
1242 },
1243 .raise_tpl = efi_raise_tpl,
1244 .restore_tpl = efi_restore_tpl,
1245 .allocate_pages = efi_allocate_pages_ext,
1246 .free_pages = efi_free_pages_ext,
1247 .get_memory_map = efi_get_memory_map_ext,
1248 .allocate_pool = efi_allocate_pool_ext,
1249 .free_pool = efi_free_pool_ext,
1250 .create_event = efi_create_event_ext,
1251 .set_timer = efi_set_timer_ext,
1252 .wait_for_event = efi_wait_for_event,
1253 .signal_event = efi_signal_event_ext,
1254 .close_event = efi_close_event,
1255 .check_event = efi_check_event,
1256 .install_protocol_interface = efi_install_protocol_interface_ext,
1257 .reinstall_protocol_interface = efi_reinstall_protocol_interface,
1258 .uninstall_protocol_interface = efi_uninstall_protocol_interface_ext,
1259 .handle_protocol = efi_handle_protocol,
1260 .reserved = NULL,
1261 .register_protocol_notify = efi_register_protocol_notify,
1262 .locate_handle = efi_locate_handle_ext,
1263 .locate_device_path = efi_locate_device_path,
1264 .install_configuration_table = efi_install_configuration_table_ext,
1265 .load_image = efi_load_image,
1266 .start_image = efi_start_image,
1267 .exit = efi_exit,
1268 .unload_image = efi_unload_image,
1269 .exit_boot_services = efi_exit_boot_services,
1270 .get_next_monotonic_count = efi_get_next_monotonic_count,
1271 .stall = efi_stall,
1272 .set_watchdog_timer = efi_set_watchdog_timer,
1273 .connect_controller = efi_connect_controller,
1274 .disconnect_controller = efi_disconnect_controller,
1275 .open_protocol = efi_open_protocol,
1276 .close_protocol = efi_close_protocol,
1277 .open_protocol_information = efi_open_protocol_information,
1278 .protocols_per_handle = efi_protocols_per_handle,
1279 .locate_handle_buffer = efi_locate_handle_buffer,
1280 .locate_protocol = efi_locate_protocol,
1281 .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
1282 .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
1283 .calculate_crc32 = efi_calculate_crc32,
1284 .copy_mem = efi_copy_mem,
1285 .set_mem = efi_set_mem,
1286 };
1287
1288
1289 static uint16_t __efi_runtime_data firmware_vendor[] =
1290 { 'D','a','s',' ','U','-','b','o','o','t',0 };
1291
1292 struct efi_system_table __efi_runtime_data systab = {
1293 .hdr = {
1294 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
1295 .revision = 0x20005, /* 2.5 */
1296 .headersize = sizeof(struct efi_table_hdr),
1297 },
1298 .fw_vendor = (long)firmware_vendor,
1299 .con_in = (void*)&efi_con_in,
1300 .con_out = (void*)&efi_con_out,
1301 .std_err = (void*)&efi_con_out,
1302 .runtime = (void*)&efi_runtime_services,
1303 .boottime = (void*)&efi_boot_services,
1304 .nr_tables = 0,
1305 .tables = (void*)efi_conf_table,
1306 };
1307