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 <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 /* Called from do_bootefi_exec() */
53 void efi_save_gd(void)
54 {
55 #ifdef CONFIG_ARM
56 	efi_gd = gd;
57 #endif
58 }
59 
60 /* Called on every callback entry */
61 void efi_restore_gd(void)
62 {
63 #ifdef CONFIG_ARM
64 	/* Only restore if we're already in EFI context */
65 	if (!efi_gd)
66 		return;
67 
68 	if (gd != efi_gd)
69 		app_gd = gd;
70 	gd = efi_gd;
71 #endif
72 }
73 
74 /* Called on every callback exit */
75 efi_status_t efi_exit_func(efi_status_t ret)
76 {
77 #ifdef CONFIG_ARM
78 	gd = app_gd;
79 #endif
80 
81 	return ret;
82 }
83 
84 static efi_status_t efi_unsupported(const char *funcname)
85 {
86 	debug("EFI: App called into unimplemented function %s\n", funcname);
87 	return EFI_EXIT(EFI_UNSUPPORTED);
88 }
89 
90 static int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
91 {
92 	return memcmp(g1, g2, sizeof(efi_guid_t));
93 }
94 
95 static unsigned long EFIAPI efi_raise_tpl(unsigned long new_tpl)
96 {
97 	EFI_ENTRY("0x%lx", new_tpl);
98 	return EFI_EXIT(0);
99 }
100 
101 static void EFIAPI efi_restore_tpl(unsigned long old_tpl)
102 {
103 	EFI_ENTRY("0x%lx", old_tpl);
104 	EFI_EXIT(efi_unsupported(__func__));
105 }
106 
107 static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
108 						  unsigned long pages,
109 						  uint64_t *memory)
110 {
111 	efi_status_t r;
112 
113 	EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
114 	r = efi_allocate_pages(type, memory_type, pages, memory);
115 	return EFI_EXIT(r);
116 }
117 
118 static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
119 					      unsigned long pages)
120 {
121 	efi_status_t r;
122 
123 	EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
124 	r = efi_free_pages(memory, pages);
125 	return EFI_EXIT(r);
126 }
127 
128 static efi_status_t EFIAPI efi_get_memory_map_ext(
129 					unsigned long *memory_map_size,
130 					struct efi_mem_desc *memory_map,
131 					unsigned long *map_key,
132 					unsigned long *descriptor_size,
133 					uint32_t *descriptor_version)
134 {
135 	efi_status_t r;
136 
137 	EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
138 		  map_key, descriptor_size, descriptor_version);
139 	r = efi_get_memory_map(memory_map_size, memory_map, map_key,
140 			       descriptor_size, descriptor_version);
141 	return EFI_EXIT(r);
142 }
143 
144 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
145 						 unsigned long size,
146 						 void **buffer)
147 {
148 	efi_status_t r;
149 
150 	EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
151 	r = efi_allocate_pool(pool_type, size, buffer);
152 	return EFI_EXIT(r);
153 }
154 
155 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
156 {
157 	efi_status_t r;
158 
159 	EFI_ENTRY("%p", buffer);
160 	r = efi_free_pool(buffer);
161 	return EFI_EXIT(r);
162 }
163 
164 /*
165  * Our event capabilities are very limited. Only support a single
166  * event to exist, so we don't need to maintain lists.
167  */
168 static struct {
169 	enum efi_event_type type;
170 	u32 trigger_type;
171 	u32 trigger_time;
172 	u64 trigger_next;
173 	unsigned long notify_tpl;
174 	void (EFIAPI *notify_function) (void *event, void *context);
175 	void *notify_context;
176 } efi_event = {
177 	/* Disable timers on bootup */
178 	.trigger_next = -1ULL,
179 };
180 
181 static efi_status_t EFIAPI efi_create_event(
182 			enum efi_event_type type, ulong notify_tpl,
183 			void (EFIAPI *notify_function) (void *event,
184 							void *context),
185 			void *notify_context, void **event)
186 {
187 	EFI_ENTRY("%d, 0x%lx, %p, %p", type, notify_tpl, notify_function,
188 		  notify_context);
189 	if (efi_event.notify_function) {
190 		/* We only support one event at a time */
191 		return EFI_EXIT(EFI_OUT_OF_RESOURCES);
192 	}
193 
194 	if (event == NULL)
195 		return EFI_EXIT(EFI_INVALID_PARAMETER);
196 
197 	if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
198 		return EFI_EXIT(EFI_INVALID_PARAMETER);
199 
200 	if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
201 	    notify_function == NULL)
202 		return EFI_EXIT(EFI_INVALID_PARAMETER);
203 
204 	efi_event.type = type;
205 	efi_event.notify_tpl = notify_tpl;
206 	efi_event.notify_function = notify_function;
207 	efi_event.notify_context = notify_context;
208 	*event = &efi_event;
209 
210 	return EFI_EXIT(EFI_SUCCESS);
211 }
212 
213 /*
214  * Our timers have to work without interrupts, so we check whenever keyboard
215  * input or disk accesses happen if enough time elapsed for it to fire.
216  */
217 void efi_timer_check(void)
218 {
219 	u64 now = timer_get_us();
220 
221 	if (now >= efi_event.trigger_next) {
222 		/* Triggering! */
223 		if (efi_event.trigger_type == EFI_TIMER_PERIODIC)
224 			efi_event.trigger_next += efi_event.trigger_time / 10;
225 		if (efi_event.type & (EVT_NOTIFY_WAIT | EVT_NOTIFY_SIGNAL))
226 			efi_event.notify_function(&efi_event,
227 			                          efi_event.notify_context);
228 	}
229 
230 	WATCHDOG_RESET();
231 }
232 
233 static efi_status_t EFIAPI efi_set_timer(void *event, int type,
234 					 uint64_t trigger_time)
235 {
236 	/* We don't have 64bit division available everywhere, so limit timer
237 	 * distances to 32bit bits. */
238 	u32 trigger32 = trigger_time;
239 
240 	EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
241 
242 	if (trigger32 < trigger_time) {
243 		printf("WARNING: Truncating timer from %"PRIx64" to %x\n",
244 		       trigger_time, trigger32);
245 	}
246 
247 	if (event != &efi_event) {
248 		/* We only support one event at a time */
249 		return EFI_EXIT(EFI_INVALID_PARAMETER);
250 	}
251 
252 	switch (type) {
253 	case EFI_TIMER_STOP:
254 		efi_event.trigger_next = -1ULL;
255 		break;
256 	case EFI_TIMER_PERIODIC:
257 	case EFI_TIMER_RELATIVE:
258 		efi_event.trigger_next = timer_get_us() + (trigger32 / 10);
259 		break;
260 	default:
261 		return EFI_EXIT(EFI_INVALID_PARAMETER);
262 	}
263 	efi_event.trigger_type = type;
264 	efi_event.trigger_time = trigger_time;
265 
266 	return EFI_EXIT(EFI_SUCCESS);
267 }
268 
269 static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
270 					      void *event, unsigned long *index)
271 {
272 	u64 now;
273 
274 	EFI_ENTRY("%ld, %p, %p", num_events, event, index);
275 
276 	now = timer_get_us();
277 	while (now < efi_event.trigger_next) { }
278 	efi_timer_check();
279 
280 	return EFI_EXIT(EFI_SUCCESS);
281 }
282 
283 static efi_status_t EFIAPI efi_signal_event(void *event)
284 {
285 	EFI_ENTRY("%p", event);
286 	return EFI_EXIT(EFI_SUCCESS);
287 }
288 
289 static efi_status_t EFIAPI efi_close_event(void *event)
290 {
291 	EFI_ENTRY("%p", event);
292 	efi_event.trigger_next = -1ULL;
293 	return EFI_EXIT(EFI_SUCCESS);
294 }
295 
296 static efi_status_t EFIAPI efi_check_event(void *event)
297 {
298 	EFI_ENTRY("%p", event);
299 	return EFI_EXIT(EFI_NOT_READY);
300 }
301 
302 static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
303 			efi_guid_t *protocol, int protocol_interface_type,
304 			void *protocol_interface)
305 {
306 	EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
307 		  protocol_interface);
308 	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
309 }
310 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
311 			efi_guid_t *protocol, void *old_interface,
312 			void *new_interface)
313 {
314 	EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
315 		  new_interface);
316 	return EFI_EXIT(EFI_ACCESS_DENIED);
317 }
318 
319 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
320 			efi_guid_t *protocol, void *protocol_interface)
321 {
322 	EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
323 	return EFI_EXIT(EFI_NOT_FOUND);
324 }
325 
326 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
327 							void *event,
328 							void **registration)
329 {
330 	EFI_ENTRY("%p, %p, %p", protocol, event, registration);
331 	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
332 }
333 
334 static int efi_search(enum efi_locate_search_type search_type,
335 		      efi_guid_t *protocol, void *search_key,
336 		      struct efi_object *efiobj)
337 {
338 	int i;
339 
340 	switch (search_type) {
341 	case all_handles:
342 		return 0;
343 	case by_register_notify:
344 		return -1;
345 	case by_protocol:
346 		for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
347 			const efi_guid_t *guid = efiobj->protocols[i].guid;
348 			if (guid && !guidcmp(guid, protocol))
349 				return 0;
350 		}
351 		return -1;
352 	}
353 
354 	return -1;
355 }
356 
357 static efi_status_t EFIAPI efi_locate_handle(
358 			enum efi_locate_search_type search_type,
359 			efi_guid_t *protocol, void *search_key,
360 			unsigned long *buffer_size, efi_handle_t *buffer)
361 {
362 	struct list_head *lhandle;
363 	unsigned long size = 0;
364 
365 	EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
366 		  buffer_size, buffer);
367 
368 	/* Count how much space we need */
369 	list_for_each(lhandle, &efi_obj_list) {
370 		struct efi_object *efiobj;
371 		efiobj = list_entry(lhandle, struct efi_object, link);
372 		if (!efi_search(search_type, protocol, search_key, efiobj)) {
373 			size += sizeof(void*);
374 		}
375 	}
376 
377 	if (*buffer_size < size) {
378 		*buffer_size = size;
379 		return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
380 	}
381 
382 	/* Then fill the array */
383 	list_for_each(lhandle, &efi_obj_list) {
384 		struct efi_object *efiobj;
385 		efiobj = list_entry(lhandle, struct efi_object, link);
386 		if (!efi_search(search_type, protocol, search_key, efiobj)) {
387 			*(buffer++) = efiobj->handle;
388 		}
389 	}
390 
391 	*buffer_size = size;
392 	return EFI_EXIT(EFI_SUCCESS);
393 }
394 
395 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
396 			struct efi_device_path **device_path,
397 			efi_handle_t *device)
398 {
399 	EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
400 	return EFI_EXIT(EFI_NOT_FOUND);
401 }
402 
403 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
404 {
405 	int i;
406 
407 	/* Check for guid override */
408 	for (i = 0; i < systab.nr_tables; i++) {
409 		if (!guidcmp(guid, &efi_conf_table[i].guid)) {
410 			efi_conf_table[i].table = table;
411 			return EFI_SUCCESS;
412 		}
413 	}
414 
415 	/* No override, check for overflow */
416 	if (i >= ARRAY_SIZE(efi_conf_table))
417 		return EFI_OUT_OF_RESOURCES;
418 
419 	/* Add a new entry */
420 	memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
421 	efi_conf_table[i].table = table;
422 	systab.nr_tables = i + 1;
423 
424 	return EFI_SUCCESS;
425 }
426 
427 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
428 							       void *table)
429 {
430 	EFI_ENTRY("%p, %p", guid, table);
431 	return EFI_EXIT(efi_install_configuration_table(guid, table));
432 }
433 
434 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
435 					  efi_handle_t parent_image,
436 					  struct efi_device_path *file_path,
437 					  void *source_buffer,
438 					  unsigned long source_size,
439 					  efi_handle_t *image_handle)
440 {
441 	static struct efi_object loaded_image_info_obj = {
442 		.protocols = {
443 			{
444 				.guid = &efi_guid_loaded_image,
445 				.open = &efi_return_handle,
446 			},
447 		},
448 	};
449 	struct efi_loaded_image *info;
450 	struct efi_object *obj;
451 
452 	EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
453 		  file_path, source_buffer, source_size, image_handle);
454 	info = malloc(sizeof(*info));
455 	obj = malloc(sizeof(loaded_image_info_obj));
456 	memset(info, 0, sizeof(*info));
457 	memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
458 	obj->handle = info;
459 	info->file_path = file_path;
460 	info->reserved = efi_load_pe(source_buffer, info);
461 	if (!info->reserved) {
462 		free(info);
463 		free(obj);
464 		return EFI_EXIT(EFI_UNSUPPORTED);
465 	}
466 
467 	*image_handle = info;
468 	list_add_tail(&obj->link, &efi_obj_list);
469 
470 	return EFI_EXIT(EFI_SUCCESS);
471 }
472 
473 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
474 					   unsigned long *exit_data_size,
475 					   s16 **exit_data)
476 {
477 	ulong (*entry)(void *image_handle, struct efi_system_table *st);
478 	struct efi_loaded_image *info = image_handle;
479 
480 	EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
481 	entry = info->reserved;
482 
483 	efi_is_direct_boot = false;
484 
485 	/* call the image! */
486 	if (setjmp(&info->exit_jmp)) {
487 		/* We returned from the child image */
488 		return EFI_EXIT(info->exit_status);
489 	}
490 
491 	entry(image_handle, &systab);
492 
493 	/* Should usually never get here */
494 	return EFI_EXIT(EFI_SUCCESS);
495 }
496 
497 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
498 			efi_status_t exit_status, unsigned long exit_data_size,
499 			int16_t *exit_data)
500 {
501 	struct efi_loaded_image *loaded_image_info = (void*)image_handle;
502 
503 	EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
504 		  exit_data_size, exit_data);
505 
506 	loaded_image_info->exit_status = exit_status;
507 	longjmp(&loaded_image_info->exit_jmp, 1);
508 
509 	panic("EFI application exited");
510 }
511 
512 static struct efi_object *efi_search_obj(void *handle)
513 {
514 	struct list_head *lhandle;
515 
516 	list_for_each(lhandle, &efi_obj_list) {
517 		struct efi_object *efiobj;
518 		efiobj = list_entry(lhandle, struct efi_object, link);
519 		if (efiobj->handle == handle)
520 			return efiobj;
521 	}
522 
523 	return NULL;
524 }
525 
526 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
527 {
528 	struct efi_object *efiobj;
529 
530 	EFI_ENTRY("%p", image_handle);
531 	efiobj = efi_search_obj(image_handle);
532 	if (efiobj)
533 		list_del(&efiobj->link);
534 
535 	return EFI_EXIT(EFI_SUCCESS);
536 }
537 
538 static void efi_exit_caches(void)
539 {
540 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
541 	/*
542 	 * Grub on 32bit ARM needs to have caches disabled before jumping into
543 	 * a zImage, but does not know of all cache layers. Give it a hand.
544 	 */
545 	if (efi_is_direct_boot)
546 		cleanup_before_linux();
547 #endif
548 }
549 
550 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
551 						  unsigned long map_key)
552 {
553 	EFI_ENTRY("%p, %ld", image_handle, map_key);
554 
555 	board_quiesce_devices();
556 
557 	/* Fix up caches for EFI payloads if necessary */
558 	efi_exit_caches();
559 
560 	/* This stops all lingering devices */
561 	bootm_disable_interrupts();
562 
563 	/* Give the payload some time to boot */
564 	WATCHDOG_RESET();
565 
566 	return EFI_EXIT(EFI_SUCCESS);
567 }
568 
569 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
570 {
571 	static uint64_t mono = 0;
572 	EFI_ENTRY("%p", count);
573 	*count = mono++;
574 	return EFI_EXIT(EFI_SUCCESS);
575 }
576 
577 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
578 {
579 	EFI_ENTRY("%ld", microseconds);
580 	udelay(microseconds);
581 	return EFI_EXIT(EFI_SUCCESS);
582 }
583 
584 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
585 						  uint64_t watchdog_code,
586 						  unsigned long data_size,
587 						  uint16_t *watchdog_data)
588 {
589 	EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
590 		  data_size, watchdog_data);
591 	return EFI_EXIT(efi_unsupported(__func__));
592 }
593 
594 static efi_status_t EFIAPI efi_connect_controller(
595 			efi_handle_t controller_handle,
596 			efi_handle_t *driver_image_handle,
597 			struct efi_device_path *remain_device_path,
598 			bool recursive)
599 {
600 	EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
601 		  remain_device_path, recursive);
602 	return EFI_EXIT(EFI_NOT_FOUND);
603 }
604 
605 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
606 						     void *driver_image_handle,
607 						     void *child_handle)
608 {
609 	EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
610 		  child_handle);
611 	return EFI_EXIT(EFI_INVALID_PARAMETER);
612 }
613 
614 static efi_status_t EFIAPI efi_close_protocol(void *handle,
615 					      efi_guid_t *protocol,
616 					      void *agent_handle,
617 					      void *controller_handle)
618 {
619 	EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
620 		  controller_handle);
621 	return EFI_EXIT(EFI_NOT_FOUND);
622 }
623 
624 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
625 			efi_guid_t *protocol,
626 			struct efi_open_protocol_info_entry **entry_buffer,
627 			unsigned long *entry_count)
628 {
629 	EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
630 		  entry_count);
631 	return EFI_EXIT(EFI_NOT_FOUND);
632 }
633 
634 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
635 			efi_guid_t ***protocol_buffer,
636 			unsigned long *protocol_buffer_count)
637 {
638 	EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
639 		  protocol_buffer_count);
640 	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
641 }
642 
643 static efi_status_t EFIAPI efi_locate_handle_buffer(
644 			enum efi_locate_search_type search_type,
645 			efi_guid_t *protocol, void *search_key,
646 			unsigned long *no_handles, efi_handle_t **buffer)
647 {
648 	EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
649 		  no_handles, buffer);
650 	return EFI_EXIT(EFI_NOT_FOUND);
651 }
652 
653 static struct efi_class_map efi_class_maps[] = {
654 	{
655 		.guid = &efi_guid_console_control,
656 		.interface = &efi_console_control
657 	},
658 };
659 
660 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
661 					       void *registration,
662 					       void **protocol_interface)
663 {
664 	int i;
665 
666 	EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
667 	for (i = 0; i < ARRAY_SIZE(efi_class_maps); i++) {
668 		struct efi_class_map *curmap = &efi_class_maps[i];
669 		if (!guidcmp(protocol, curmap->guid)) {
670 			*protocol_interface = (void*)curmap->interface;
671 			return EFI_EXIT(EFI_SUCCESS);
672 		}
673 	}
674 
675 	return EFI_EXIT(EFI_NOT_FOUND);
676 }
677 
678 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
679 			void **handle, ...)
680 {
681 	EFI_ENTRY("%p", handle);
682 	return EFI_EXIT(EFI_OUT_OF_RESOURCES);
683 }
684 
685 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
686 			void *handle, ...)
687 {
688 	EFI_ENTRY("%p", handle);
689 	return EFI_EXIT(EFI_INVALID_PARAMETER);
690 }
691 
692 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
693 					       unsigned long data_size,
694 					       uint32_t *crc32_p)
695 {
696 	EFI_ENTRY("%p, %ld", data, data_size);
697 	*crc32_p = crc32(0, data, data_size);
698 	return EFI_EXIT(EFI_SUCCESS);
699 }
700 
701 static void EFIAPI efi_copy_mem(void *destination, void *source,
702 				unsigned long length)
703 {
704 	EFI_ENTRY("%p, %p, %ld", destination, source, length);
705 	memcpy(destination, source, length);
706 }
707 
708 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
709 {
710 	EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
711 	memset(buffer, value, size);
712 }
713 
714 static efi_status_t EFIAPI efi_open_protocol(
715 			void *handle, efi_guid_t *protocol,
716 			void **protocol_interface, void *agent_handle,
717 			void *controller_handle, uint32_t attributes)
718 {
719 	struct list_head *lhandle;
720 	int i;
721 	efi_status_t r = EFI_UNSUPPORTED;
722 
723 	EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
724 		  protocol_interface, agent_handle, controller_handle,
725 		  attributes);
726 	list_for_each(lhandle, &efi_obj_list) {
727 		struct efi_object *efiobj;
728 		efiobj = list_entry(lhandle, struct efi_object, link);
729 
730 		if (efiobj->handle != handle)
731 			continue;
732 
733 		for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
734 			struct efi_handler *handler = &efiobj->protocols[i];
735 			const efi_guid_t *hprotocol = handler->guid;
736 			if (!hprotocol)
737 				break;
738 			if (!guidcmp(hprotocol, protocol)) {
739 				r = handler->open(handle, protocol,
740 				    protocol_interface, agent_handle,
741 				    controller_handle, attributes);
742 				goto out;
743 			}
744 		}
745 	}
746 
747 out:
748 	return EFI_EXIT(r);
749 }
750 
751 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
752 					       efi_guid_t *protocol,
753 					       void **protocol_interface)
754 {
755 	return efi_open_protocol(handle, protocol, protocol_interface, NULL,
756 				 NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
757 }
758 
759 static const struct efi_boot_services efi_boot_services = {
760 	.hdr = {
761 		.headersize = sizeof(struct efi_table_hdr),
762 	},
763 	.raise_tpl = efi_raise_tpl,
764 	.restore_tpl = efi_restore_tpl,
765 	.allocate_pages = efi_allocate_pages_ext,
766 	.free_pages = efi_free_pages_ext,
767 	.get_memory_map = efi_get_memory_map_ext,
768 	.allocate_pool = efi_allocate_pool_ext,
769 	.free_pool = efi_free_pool_ext,
770 	.create_event = efi_create_event,
771 	.set_timer = efi_set_timer,
772 	.wait_for_event = efi_wait_for_event,
773 	.signal_event = efi_signal_event,
774 	.close_event = efi_close_event,
775 	.check_event = efi_check_event,
776 	.install_protocol_interface = efi_install_protocol_interface,
777 	.reinstall_protocol_interface = efi_reinstall_protocol_interface,
778 	.uninstall_protocol_interface = efi_uninstall_protocol_interface,
779 	.handle_protocol = efi_handle_protocol,
780 	.reserved = NULL,
781 	.register_protocol_notify = efi_register_protocol_notify,
782 	.locate_handle = efi_locate_handle,
783 	.locate_device_path = efi_locate_device_path,
784 	.install_configuration_table = efi_install_configuration_table_ext,
785 	.load_image = efi_load_image,
786 	.start_image = efi_start_image,
787 	.exit = efi_exit,
788 	.unload_image = efi_unload_image,
789 	.exit_boot_services = efi_exit_boot_services,
790 	.get_next_monotonic_count = efi_get_next_monotonic_count,
791 	.stall = efi_stall,
792 	.set_watchdog_timer = efi_set_watchdog_timer,
793 	.connect_controller = efi_connect_controller,
794 	.disconnect_controller = efi_disconnect_controller,
795 	.open_protocol = efi_open_protocol,
796 	.close_protocol = efi_close_protocol,
797 	.open_protocol_information = efi_open_protocol_information,
798 	.protocols_per_handle = efi_protocols_per_handle,
799 	.locate_handle_buffer = efi_locate_handle_buffer,
800 	.locate_protocol = efi_locate_protocol,
801 	.install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
802 	.uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
803 	.calculate_crc32 = efi_calculate_crc32,
804 	.copy_mem = efi_copy_mem,
805 	.set_mem = efi_set_mem,
806 };
807 
808 
809 static uint16_t __efi_runtime_data firmware_vendor[] =
810 	{ 'D','a','s',' ','U','-','b','o','o','t',0 };
811 
812 struct efi_system_table __efi_runtime_data systab = {
813 	.hdr = {
814 		.signature = EFI_SYSTEM_TABLE_SIGNATURE,
815 		.revision = 0x20005, /* 2.5 */
816 		.headersize = sizeof(struct efi_table_hdr),
817 	},
818 	.fw_vendor = (long)firmware_vendor,
819 	.con_in = (void*)&efi_con_in,
820 	.con_out = (void*)&efi_con_out,
821 	.std_err = (void*)&efi_con_out,
822 	.runtime = (void*)&efi_runtime_services,
823 	.boottime = (void*)&efi_boot_services,
824 	.nr_tables = 0,
825 	.tables = (void*)efi_conf_table,
826 };
827