summaryrefslogtreecommitdiffstats
path: root/lib/efi_loader/efi_boottime.c
blob: 9daca50a72fc1b7c92212c30bcbb7aed5d34e6b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
/*
 *  EFI application boot time services
 *
 *  Copyright (c) 2016 Alexander Graf
 *
 *  SPDX-License-Identifier:     GPL-2.0+
 */

/* #define DEBUG_EFI */

#include <common.h>
#include <efi_loader.h>
#include <malloc.h>
#include <asm/global_data.h>
#include <libfdt_env.h>
#include <u-boot/crc.h>
#include <bootm.h>
#include <inttypes.h>
#include <watchdog.h>

DECLARE_GLOBAL_DATA_PTR;

/* This list contains all the EFI objects our payload has access to */
LIST_HEAD(efi_obj_list);

/*
 * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
 * we need to do trickery with caches. Since we don't want to break the EFI
 * aware boot path, only apply hacks when loading exiting directly (breaking
 * direct Linux EFI booting along the way - oh well).
 */
static bool efi_is_direct_boot = true;

/*
 * EFI can pass arbitrary additional "tables" containing vendor specific
 * information to the payload. One such table is the FDT table which contains
 * a pointer to a flattened device tree blob.
 *
 * In most cases we want to pass an FDT to the payload, so reserve one slot of
 * config table space for it. The pointer gets populated by do_bootefi_exec().
 */
static struct efi_configuration_table EFI_RUNTIME_DATA efi_conf_table[1];

/*
 * The "gd" pointer lives in a register on ARM and AArch64 that we declare
 * fixed when compiling U-Boot. However, the payload does not know about that
 * restriction so we need to manually swap its and our view of that register on
 * EFI callback entry/exit.
 */
static volatile void *efi_gd, *app_gd;

/* Called from do_bootefi_exec() */
void efi_save_gd(void)
{
	efi_gd = gd;
}

/* Called on every callback entry */
void efi_restore_gd(void)
{
	/* Only restore if we're already in EFI context */
	if (!efi_gd)
		return;

	if (gd != efi_gd)
		app_gd = gd;
	gd = efi_gd;
}

/* Called on every callback exit */
efi_status_t efi_exit_func(efi_status_t ret)
{
	gd = app_gd;
	return ret;
}

static efi_status_t efi_unsupported(const char *funcname)
{
#ifdef DEBUG_EFI
	printf("EFI: App called into unimplemented function %s\n", funcname);
#endif
	return EFI_EXIT(EFI_UNSUPPORTED);
}

static int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
{
	return memcmp(g1, g2, sizeof(efi_guid_t));
}

static unsigned long EFIAPI efi_raise_tpl(unsigned long new_tpl)
{
	EFI_ENTRY("0x%lx", new_tpl);
	return EFI_EXIT(0);
}

static void EFIAPI efi_restore_tpl(unsigned long old_tpl)
{
	EFI_ENTRY("0x%lx", old_tpl);
	EFI_EXIT(efi_unsupported(__func__));
}

efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
					   unsigned long pages,
					   uint64_t *memory)
{
	efi_status_t r;

	EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
	r = efi_allocate_pages(type, memory_type, pages, memory);
	return EFI_EXIT(r);
}

efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory, unsigned long pages)
{
	efi_status_t r;

	EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
	r = efi_free_pages(memory, pages);
	return EFI_EXIT(r);
}

efi_status_t EFIAPI 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)
{
	efi_status_t r;

	EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
		  map_key, descriptor_size, descriptor_version);
	r = efi_get_memory_map(memory_map_size, memory_map, map_key,
			       descriptor_size, descriptor_version);
	return EFI_EXIT(r);
}

static efi_status_t EFIAPI efi_allocate_pool(int pool_type, unsigned long size,
					     void **buffer)
{
	efi_status_t r;

	EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
	r = efi_allocate_pages(0, pool_type, (size + 0xfff) >> 12, (void*)buffer);
	return EFI_EXIT(r);
}

static efi_status_t EFIAPI efi_free_pool(void *buffer)
{
	efi_status_t r;

	EFI_ENTRY("%p", buffer);
	r = efi_free_pages((ulong)buffer, 0);
	return EFI_EXIT(r);
}

/*
 * Our event capabilities are very limited. Only support a single
 * event to exist, so we don't need to maintain lists.
 */
static struct {
	enum efi_event_type type;
	u32 trigger_type;
	u32 trigger_time;
	u64 trigger_next;
	unsigned long notify_tpl;
	void (*notify_function) (void *event, void *context);
	void *notify_context;
} efi_event = {
	/* Disable timers on bootup */
	.trigger_next = -1ULL,
};

static efi_status_t EFIAPI efi_create_event(
			enum efi_event_type type, ulong notify_tpl,
			void (*notify_function) (void *event, void *context),
			void *notify_context, void **event)
{
	EFI_ENTRY("%d, 0x%lx, %p, %p", type, notify_tpl, notify_function,
		  notify_context);
	if (efi_event.notify_function) {
		/* We only support one event at a time */
		return EFI_EXIT(EFI_OUT_OF_RESOURCES);
	}

	efi_event.type = type;
	efi_event.notify_tpl = notify_tpl;
	efi_event.notify_function = notify_function;
	efi_event.notify_context = notify_context;
	*event = &efi_event;

	return EFI_EXIT(EFI_SUCCESS);
}

/*
 * Our timers have to work without interrupts, so we check whenever keyboard
 * input or disk accesses happen if enough time elapsed for it to fire.
 */
void efi_timer_check(void)
{
	u64 now = timer_get_us();

	if (now >= efi_event.trigger_next) {
		/* Triggering! */
		if (efi_event.trigger_type == EFI_TIMER_PERIODIC)
			efi_event.trigger_next += efi_event.trigger_time / 10;
		efi_event.notify_function(&efi_event, efi_event.notify_context);
	}

	WATCHDOG_RESET();
}

static efi_status_t EFIAPI efi_set_timer(void *event, int type,
					 uint64_t trigger_time)
{
	/* We don't have 64bit division available everywhere, so limit timer
	 * distances to 32bit bits. */
	u32 trigger32 = trigger_time;

	EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);

	if (trigger32 < trigger_time) {
		printf("WARNING: Truncating timer from %"PRIx64" to %x\n",
		       trigger_time, trigger32);
	}

	if (event != &efi_event) {
		/* We only support one event at a time */
		return EFI_EXIT(EFI_INVALID_PARAMETER);
	}

	switch (type) {
	case EFI_TIMER_STOP:
		efi_event.trigger_next = -1ULL;
		break;
	case EFI_TIMER_PERIODIC:
	case EFI_TIMER_RELATIVE:
		efi_event.trigger_next = timer_get_us() + (trigger32 / 10);
		break;
	default:
		return EFI_EXIT(EFI_INVALID_PARAMETER);
	}
	efi_event.trigger_type = type;
	efi_event.trigger_time = trigger_time;

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
					      void *event, unsigned long *index)
{
	u64 now;

	EFI_ENTRY("%ld, %p, %p", num_events, event, index);

	now = timer_get_us();
	while (now < efi_event.trigger_next) { }
	efi_timer_check();

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_signal_event(void *event)
{
	EFI_ENTRY("%p", event);
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_close_event(void *event)
{
	EFI_ENTRY("%p", event);
	efi_event.trigger_next = -1ULL;
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_check_event(void *event)
{
	EFI_ENTRY("%p", event);
	return EFI_EXIT(EFI_NOT_READY);
}

static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
			efi_guid_t *protocol, int protocol_interface_type,
			void *protocol_interface)
{
	EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
		  protocol_interface);
	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
}
static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
			efi_guid_t *protocol, void *old_interface,
			void *new_interface)
{
	EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
		  new_interface);
	return EFI_EXIT(EFI_ACCESS_DENIED);
}

static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
			efi_guid_t *protocol, void *protocol_interface)
{
	EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
	return EFI_EXIT(EFI_NOT_FOUND);
}

static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
							void *event,
							void **registration)
{
	EFI_ENTRY("%p, %p, %p", protocol, event, registration);
	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
}

static int efi_search(enum efi_locate_search_type search_type,
		      efi_guid_t *protocol, void *search_key,
		      struct efi_object *efiobj)
{
	int i;

	switch (search_type) {
	case all_handles:
		return 0;
	case by_register_notify:
		return -1;
	case by_protocol:
		for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
			const efi_guid_t *guid = efiobj->protocols[i].guid;
			if (guid && !guidcmp(guid, protocol))
				return 0;
		}
		return -1;
	}

	return -1;
}

static efi_status_t EFIAPI 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)
{
	struct list_head *lhandle;
	unsigned long size = 0;

	EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
		  buffer_size, buffer);

	/* Count how much space we need */
	list_for_each(lhandle, &efi_obj_list) {
		struct efi_object *efiobj;
		efiobj = list_entry(lhandle, struct efi_object, link);
		if (!efi_search(search_type, protocol, search_key, efiobj)) {
			size += sizeof(void*);
		}
	}

	if (*buffer_size < size) {
		*buffer_size = size;
		return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
	}

	/* Then fill the array */
	list_for_each(lhandle, &efi_obj_list) {
		struct efi_object *efiobj;
		efiobj = list_entry(lhandle, struct efi_object, link);
		if (!efi_search(search_type, protocol, search_key, efiobj)) {
			*(buffer++) = efiobj->handle;
		}
	}

	*buffer_size = size;
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
			struct efi_device_path **device_path,
			efi_handle_t *device)
{
	EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
	return EFI_EXIT(EFI_NOT_FOUND);
}

static efi_status_t EFIAPI efi_install_configuration_table(efi_guid_t *guid,
							   void *table)
{
	int i;

	EFI_ENTRY("%p, %p", guid, table);

	/* Check for guid override */
	for (i = 0; i < systab.nr_tables; i++) {
		if (!guidcmp(guid, &efi_conf_table[i].guid)) {
			efi_conf_table[i].table = table;
			return EFI_EXIT(EFI_SUCCESS);
		}
	}

	/* No override, check for overflow */
	if (i >= ARRAY_SIZE(efi_conf_table))
		return EFI_EXIT(EFI_OUT_OF_RESOURCES);

	/* Add a new entry */
	memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
	efi_conf_table[i].table = table;
	systab.nr_tables = i;

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI 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)
{
	static struct efi_object loaded_image_info_obj = {
		.protocols = {
			{
				.guid = &efi_guid_loaded_image,
				.open = &efi_return_handle,
			},
		},
	};
	struct efi_loaded_image *info;
	struct efi_object *obj;

	EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
		  file_path, source_buffer, source_size, image_handle);
	info = malloc(sizeof(*info));
	obj = malloc(sizeof(loaded_image_info_obj));
	memset(info, 0, sizeof(*info));
	memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
	obj->handle = info;
	info->file_path = file_path;
	info->reserved = efi_load_pe(source_buffer, info);
	if (!info->reserved) {
		free(info);
		free(obj);
		return EFI_EXIT(EFI_UNSUPPORTED);
	}

	*image_handle = info;
	list_add_tail(&obj->link, &efi_obj_list);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
					   unsigned long *exit_data_size,
					   s16 **exit_data)
{
	ulong (*entry)(void *image_handle, struct efi_system_table *st);
	struct efi_loaded_image *info = image_handle;

	EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
	entry = info->reserved;

	efi_is_direct_boot = false;

	/* call the image! */
	entry(image_handle, &systab);

	/* Should usually never get here */
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_exit(void *image_handle, long exit_status,
				    unsigned long exit_data_size,
				    uint16_t *exit_data)
{
	EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
		  exit_data_size, exit_data);
	return EFI_EXIT(efi_unsupported(__func__));
}

static struct efi_object *efi_search_obj(void *handle)
{
	struct list_head *lhandle;

	list_for_each(lhandle, &efi_obj_list) {
		struct efi_object *efiobj;
		efiobj = list_entry(lhandle, struct efi_object, link);
		if (efiobj->handle == handle)
			return efiobj;
	}

	return NULL;
}

static efi_status_t EFIAPI efi_unload_image(void *image_handle)
{
	struct efi_object *efiobj;

	EFI_ENTRY("%p", image_handle);
	efiobj = efi_search_obj(image_handle);
	if (efiobj)
		list_del(&efiobj->link);

	return EFI_EXIT(EFI_SUCCESS);
}

static void efi_exit_caches(void)
{
#if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
	/*
	 * Grub on 32bit ARM needs to have caches disabled before jumping into
	 * a zImage, but does not know of all cache layers. Give it a hand.
	 */
	if (efi_is_direct_boot)
		cleanup_before_linux();
#endif
}

static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
						  unsigned long map_key)
{
	EFI_ENTRY("%p, %ld", image_handle, map_key);

	/* Fix up caches for EFI payloads if necessary */
	efi_exit_caches();

	/* This stops all lingering devices */
	bootm_disable_interrupts();

	/* Give the payload some time to boot */
	WATCHDOG_RESET();

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
{
	static uint64_t mono = 0;
	EFI_ENTRY("%p", count);
	*count = mono++;
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
{
	EFI_ENTRY("%ld", microseconds);
	udelay(microseconds);
	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
						  uint64_t watchdog_code,
						  unsigned long data_size,
						  uint16_t *watchdog_data)
{
	EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
		  data_size, watchdog_data);
	return EFI_EXIT(efi_unsupported(__func__));
}

static efi_status_t EFIAPI efi_connect_controller(
			efi_handle_t controller_handle,
			efi_handle_t *driver_image_handle,
			struct efi_device_path *remain_device_path,
			bool recursive)
{
	EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
		  remain_device_path, recursive);
	return EFI_EXIT(EFI_NOT_FOUND);
}

static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
						     void *driver_image_handle,
						     void *child_handle)
{
	EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
		  child_handle);
	return EFI_EXIT(EFI_INVALID_PARAMETER);
}

static efi_status_t EFIAPI efi_close_protocol(void *handle,
					      efi_guid_t *protocol,
					      void *agent_handle,
					      void *controller_handle)
{
	EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
		  controller_handle);
	return EFI_EXIT(EFI_NOT_FOUND);
}

static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
			efi_guid_t *protocol,
			struct efi_open_protocol_info_entry **entry_buffer,
			unsigned long *entry_count)
{
	EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
		  entry_count);
	return EFI_EXIT(EFI_NOT_FOUND);
}

static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
			efi_guid_t ***protocol_buffer,
			unsigned long *protocol_buffer_count)
{
	EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
		  protocol_buffer_count);
	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
}

static efi_status_t EFIAPI 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)
{
	EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
		  no_handles, buffer);
	return EFI_EXIT(EFI_NOT_FOUND);
}

static struct efi_class_map efi_class_maps[] = {
	{
		.guid = &efi_guid_console_control,
		.interface = &efi_console_control
	},
};

static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
					       void *registration,
					       void **protocol_interface)
{
	int i;

	EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
	for (i = 0; i < ARRAY_SIZE(efi_class_maps); i++) {
		struct efi_class_map *curmap = &efi_class_maps[i];
		if (!guidcmp(protocol, curmap->guid)) {
			*protocol_interface = (void*)curmap->interface;
			return EFI_EXIT(EFI_SUCCESS);
		}
	}

	return EFI_EXIT(EFI_NOT_FOUND);
}

static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
			void **handle, ...)
{
	EFI_ENTRY("%p", handle);
	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
}

static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
			void *handle, ...)
{
	EFI_ENTRY("%p", handle);
	return EFI_EXIT(EFI_INVALID_PARAMETER);
}

static efi_status_t EFIAPI efi_calculate_crc32(void *data,
					       unsigned long data_size,
					       uint32_t *crc32_p)
{
	EFI_ENTRY("%p, %ld", data, data_size);
	*crc32_p = crc32(0, data, data_size);
	return EFI_EXIT(EFI_SUCCESS);
}

static void EFIAPI efi_copy_mem(void *destination, void *source,
				unsigned long length)
{
	EFI_ENTRY("%p, %p, %ld", destination, source, length);
	memcpy(destination, source, length);
}

static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
{
	EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
	memset(buffer, value, size);
}

static efi_status_t EFIAPI efi_open_protocol(
			void *handle, efi_guid_t *protocol,
			void **protocol_interface, void *agent_handle,
			void *controller_handle, uint32_t attributes)
{
	struct list_head *lhandle;
	int i;
	efi_status_t r = EFI_UNSUPPORTED;

	EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
		  protocol_interface, agent_handle, controller_handle,
		  attributes);
	list_for_each(lhandle, &efi_obj_list) {
		struct efi_object *efiobj;
		efiobj = list_entry(lhandle, struct efi_object, link);

		if (efiobj->handle != handle)
			continue;

		for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
			struct efi_handler *handler = &efiobj->protocols[i];
			const efi_guid_t *hprotocol = handler->guid;
			if (!hprotocol)
				break;
			if (!guidcmp(hprotocol, protocol)) {
				r = handler->open(handle, protocol,
				    protocol_interface, agent_handle,
				    controller_handle, attributes);
				goto out;
			}
		}
	}

out:
	return EFI_EXIT(r);
}

static efi_status_t EFIAPI efi_handle_protocol(void *handle,
					       efi_guid_t *protocol,
					       void **protocol_interface)
{
	return efi_open_protocol(handle, protocol, protocol_interface,
				 NULL, NULL, 0);
}

static const struct efi_boot_services efi_boot_services = {
	.hdr = {
		.headersize = sizeof(struct efi_table_hdr),
	},
	.raise_tpl = efi_raise_tpl,
	.restore_tpl = efi_restore_tpl,
	.allocate_pages = efi_allocate_pages_ext,
	.free_pages = efi_free_pages_ext,
	.get_memory_map = efi_get_memory_map_ext,
	.allocate_pool = efi_allocate_pool,
	.free_pool = efi_free_pool,
	.create_event = efi_create_event,
	.set_timer = efi_set_timer,
	.wait_for_event = efi_wait_for_event,
	.signal_event = efi_signal_event,
	.close_event = efi_close_event,
	.check_event = efi_check_event,
	.install_protocol_interface = efi_install_protocol_interface,
	.reinstall_protocol_interface = efi_reinstall_protocol_interface,
	.uninstall_protocol_interface = efi_uninstall_protocol_interface,
	.handle_protocol = efi_handle_protocol,
	.reserved = NULL,
	.register_protocol_notify = efi_register_protocol_notify,
	.locate_handle = efi_locate_handle,
	.locate_device_path = efi_locate_device_path,
	.install_configuration_table = efi_install_configuration_table,
	.load_image = efi_load_image,
	.start_image = efi_start_image,
	.exit = (void*)efi_exit,
	.unload_image = efi_unload_image,
	.exit_boot_services = efi_exit_boot_services,
	.get_next_monotonic_count = efi_get_next_monotonic_count,
	.stall = efi_stall,
	.set_watchdog_timer = efi_set_watchdog_timer,
	.connect_controller = efi_connect_controller,
	.disconnect_controller = efi_disconnect_controller,
	.open_protocol = efi_open_protocol,
	.close_protocol = efi_close_protocol,
	.open_protocol_information = efi_open_protocol_information,
	.protocols_per_handle = efi_protocols_per_handle,
	.locate_handle_buffer = efi_locate_handle_buffer,
	.locate_protocol = efi_locate_protocol,
	.install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
	.uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
	.calculate_crc32 = efi_calculate_crc32,
	.copy_mem = efi_copy_mem,
	.set_mem = efi_set_mem,
};


static uint16_t EFI_RUNTIME_DATA firmware_vendor[] =
	{ 'D','a','s',' ','U','-','b','o','o','t',0 };

struct efi_system_table EFI_RUNTIME_DATA systab = {
	.hdr = {
		.signature = EFI_SYSTEM_TABLE_SIGNATURE,
		.revision = 0x20005, /* 2.5 */
		.headersize = sizeof(struct efi_table_hdr),
	},
	.fw_vendor = (long)firmware_vendor,
	.con_in = (void*)&efi_con_in,
	.con_out = (void*)&efi_con_out,
	.std_err = (void*)&efi_con_out,
	.runtime = (void*)&efi_runtime_services,
	.boottime = (void*)&efi_boot_services,
	.nr_tables = 0,
	.tables = (void*)efi_conf_table,
};
OpenPOWER on IntegriCloud