1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * EFI application runtime services
4 *
5 * Copyright (c) 2016 Alexander Graf
6 */
7
8 #include <common.h>
9 #include <command.h>
10 #include <dm.h>
11 #include <elf.h>
12 #include <efi_loader.h>
13 #include <rtc.h>
14
15 /* For manual relocation support */
16 DECLARE_GLOBAL_DATA_PTR;
17
18 struct efi_runtime_mmio_list {
19 struct list_head link;
20 void **ptr;
21 u64 paddr;
22 u64 len;
23 };
24
25 /* This list contains all runtime available mmio regions */
26 LIST_HEAD(efi_runtime_mmio);
27
28 static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void);
29 static efi_status_t __efi_runtime EFIAPI efi_device_error(void);
30 static efi_status_t __efi_runtime EFIAPI efi_invalid_parameter(void);
31
32 /*
33 * TODO(sjg@chromium.org): These defines and structures should come from the ELF
34 * header for each architecture (or a generic header) rather than being repeated
35 * here.
36 */
37 #if defined(__aarch64__)
38 #define R_RELATIVE R_AARCH64_RELATIVE
39 #define R_MASK 0xffffffffULL
40 #define IS_RELA 1
41 #elif defined(__arm__)
42 #define R_RELATIVE R_ARM_RELATIVE
43 #define R_MASK 0xffULL
44 #elif defined(__i386__)
45 #define R_RELATIVE R_386_RELATIVE
46 #define R_MASK 0xffULL
47 #elif defined(__x86_64__)
48 #define R_RELATIVE R_X86_64_RELATIVE
49 #define R_MASK 0xffffffffULL
50 #define IS_RELA 1
51 #elif defined(__riscv)
52 #define R_RELATIVE R_RISCV_RELATIVE
53 #define R_MASK 0xffULL
54 #define IS_RELA 1
55
56 struct dyn_sym {
57 ulong foo1;
58 ulong addr;
59 u32 foo2;
60 u32 foo3;
61 };
62 #if (__riscv_xlen == 32)
63 #define R_ABSOLUTE R_RISCV_32
64 #define SYM_INDEX 8
65 #elif (__riscv_xlen == 64)
66 #define R_ABSOLUTE R_RISCV_64
67 #define SYM_INDEX 32
68 #else
69 #error unknown riscv target
70 #endif
71 #else
72 #error Need to add relocation awareness
73 #endif
74
75 struct elf_rel {
76 ulong *offset;
77 ulong info;
78 };
79
80 struct elf_rela {
81 ulong *offset;
82 ulong info;
83 long addend;
84 };
85
86 /*
87 * EFI runtime code lives in two stages. In the first stage, U-Boot and an EFI
88 * payload are running concurrently at the same time. In this mode, we can
89 * handle a good number of runtime callbacks
90 */
91
92 /**
93 * efi_update_table_header_crc32() - Update crc32 in table header
94 *
95 * @table: EFI table
96 */
efi_update_table_header_crc32(struct efi_table_hdr * table)97 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table)
98 {
99 table->crc32 = 0;
100 table->crc32 = crc32(0, (const unsigned char *)table,
101 table->headersize);
102 }
103
104 /**
105 * efi_reset_system_boottime() - reset system at boot time
106 *
107 * This function implements the ResetSystem() runtime service before
108 * SetVirtualAddressMap() is called.
109 *
110 * See the Unified Extensible Firmware Interface (UEFI) specification for
111 * details.
112 *
113 * @reset_type: type of reset to perform
114 * @reset_status: status code for the reset
115 * @data_size: size of reset_data
116 * @reset_data: information about the reset
117 */
efi_reset_system_boottime(enum efi_reset_type reset_type,efi_status_t reset_status,unsigned long data_size,void * reset_data)118 static void EFIAPI efi_reset_system_boottime(
119 enum efi_reset_type reset_type,
120 efi_status_t reset_status,
121 unsigned long data_size, void *reset_data)
122 {
123 struct efi_event *evt;
124
125 EFI_ENTRY("%d %lx %lx %p", reset_type, reset_status, data_size,
126 reset_data);
127
128 /* Notify reset */
129 list_for_each_entry(evt, &efi_events, link) {
130 if (evt->group &&
131 !guidcmp(evt->group,
132 &efi_guid_event_group_reset_system)) {
133 efi_signal_event(evt, false);
134 break;
135 }
136 }
137 switch (reset_type) {
138 case EFI_RESET_COLD:
139 case EFI_RESET_WARM:
140 case EFI_RESET_PLATFORM_SPECIFIC:
141 do_reset(NULL, 0, 0, NULL);
142 break;
143 case EFI_RESET_SHUTDOWN:
144 #ifdef CONFIG_CMD_POWEROFF
145 do_poweroff(NULL, 0, 0, NULL);
146 #endif
147 break;
148 }
149
150 while (1) { }
151 }
152
153 /**
154 * efi_get_time_boottime() - get current time at boot time
155 *
156 * This function implements the GetTime runtime service before
157 * SetVirtualAddressMap() is called.
158 *
159 * See the Unified Extensible Firmware Interface (UEFI) specification
160 * for details.
161 *
162 * @time: pointer to structure to receive current time
163 * @capabilities: pointer to structure to receive RTC properties
164 * Returns: status code
165 */
efi_get_time_boottime(struct efi_time * time,struct efi_time_cap * capabilities)166 static efi_status_t EFIAPI efi_get_time_boottime(
167 struct efi_time *time,
168 struct efi_time_cap *capabilities)
169 {
170 #ifdef CONFIG_DM_RTC
171 efi_status_t ret = EFI_SUCCESS;
172 int r;
173 struct rtc_time tm;
174 struct udevice *dev;
175
176 EFI_ENTRY("%p %p", time, capabilities);
177
178 if (!time) {
179 ret = EFI_INVALID_PARAMETER;
180 goto out;
181 }
182
183 r = uclass_get_device(UCLASS_RTC, 0, &dev);
184 if (!r)
185 r = dm_rtc_get(dev, &tm);
186 if (r) {
187 ret = EFI_DEVICE_ERROR;
188 goto out;
189 }
190
191 memset(time, 0, sizeof(*time));
192 time->year = tm.tm_year;
193 time->month = tm.tm_mon;
194 time->day = tm.tm_mday;
195 time->hour = tm.tm_hour;
196 time->minute = tm.tm_min;
197 time->second = tm.tm_sec;
198 time->daylight = EFI_TIME_ADJUST_DAYLIGHT;
199 if (tm.tm_isdst > 0)
200 time->daylight |= EFI_TIME_IN_DAYLIGHT;
201 time->timezone = EFI_UNSPECIFIED_TIMEZONE;
202
203 if (capabilities) {
204 /* Set reasonable dummy values */
205 capabilities->resolution = 1; /* 1 Hz */
206 capabilities->accuracy = 100000000; /* 100 ppm */
207 capabilities->sets_to_zero = false;
208 }
209 out:
210 return EFI_EXIT(ret);
211 #else
212 EFI_ENTRY("%p %p", time, capabilities);
213 return EFI_EXIT(EFI_DEVICE_ERROR);
214 #endif
215 }
216
217
218 /**
219 * efi_reset_system() - reset system
220 *
221 * This function implements the ResetSystem() runtime service after
222 * SetVirtualAddressMap() is called. It only executes an endless loop.
223 * Boards may override the helpers below to implement reset functionality.
224 *
225 * See the Unified Extensible Firmware Interface (UEFI) specification for
226 * details.
227 *
228 * @reset_type: type of reset to perform
229 * @reset_status: status code for the reset
230 * @data_size: size of reset_data
231 * @reset_data: information about the reset
232 */
efi_reset_system(enum efi_reset_type reset_type,efi_status_t reset_status,unsigned long data_size,void * reset_data)233 void __weak __efi_runtime EFIAPI efi_reset_system(
234 enum efi_reset_type reset_type,
235 efi_status_t reset_status,
236 unsigned long data_size, void *reset_data)
237 {
238 /* Nothing we can do */
239 while (1) { }
240 }
241
242 /**
243 * efi_reset_system_init() - initialize the reset driver
244 *
245 * Boards may override this function to initialize the reset driver.
246 */
efi_reset_system_init(void)247 efi_status_t __weak efi_reset_system_init(void)
248 {
249 return EFI_SUCCESS;
250 }
251
252 /**
253 * efi_get_time() - get current time
254 *
255 * This function implements the GetTime runtime service after
256 * SetVirtualAddressMap() is called. As the U-Boot driver are not available
257 * anymore only an error code is returned.
258 *
259 * See the Unified Extensible Firmware Interface (UEFI) specification
260 * for details.
261 *
262 * @time: pointer to structure to receive current time
263 * @capabilities: pointer to structure to receive RTC properties
264 * Returns: status code
265 */
efi_get_time(struct efi_time * time,struct efi_time_cap * capabilities)266 efi_status_t __weak __efi_runtime EFIAPI efi_get_time(
267 struct efi_time *time,
268 struct efi_time_cap *capabilities)
269 {
270 /* Nothing we can do */
271 return EFI_DEVICE_ERROR;
272 }
273
274 struct efi_runtime_detach_list_struct {
275 void *ptr;
276 void *patchto;
277 };
278
279 static const struct efi_runtime_detach_list_struct efi_runtime_detach_list[] = {
280 {
281 /* do_reset is gone */
282 .ptr = &efi_runtime_services.reset_system,
283 .patchto = efi_reset_system,
284 }, {
285 /* invalidate_*cache_all are gone */
286 .ptr = &efi_runtime_services.set_virtual_address_map,
287 .patchto = &efi_unimplemented,
288 }, {
289 /* RTC accessors are gone */
290 .ptr = &efi_runtime_services.get_time,
291 .patchto = &efi_get_time,
292 }, {
293 /* Clean up system table */
294 .ptr = &systab.con_in,
295 .patchto = NULL,
296 }, {
297 /* Clean up system table */
298 .ptr = &systab.con_out,
299 .patchto = NULL,
300 }, {
301 /* Clean up system table */
302 .ptr = &systab.std_err,
303 .patchto = NULL,
304 }, {
305 /* Clean up system table */
306 .ptr = &systab.boottime,
307 .patchto = NULL,
308 }, {
309 .ptr = &efi_runtime_services.get_variable,
310 .patchto = &efi_device_error,
311 }, {
312 .ptr = &efi_runtime_services.get_next_variable_name,
313 .patchto = &efi_device_error,
314 }, {
315 .ptr = &efi_runtime_services.set_variable,
316 .patchto = &efi_device_error,
317 }
318 };
319
efi_runtime_tobedetached(void * p)320 static bool efi_runtime_tobedetached(void *p)
321 {
322 int i;
323
324 for (i = 0; i < ARRAY_SIZE(efi_runtime_detach_list); i++)
325 if (efi_runtime_detach_list[i].ptr == p)
326 return true;
327
328 return false;
329 }
330
efi_runtime_detach(ulong offset)331 static void efi_runtime_detach(ulong offset)
332 {
333 int i;
334 ulong patchoff = offset - (ulong)gd->relocaddr;
335
336 for (i = 0; i < ARRAY_SIZE(efi_runtime_detach_list); i++) {
337 ulong patchto = (ulong)efi_runtime_detach_list[i].patchto;
338 ulong *p = efi_runtime_detach_list[i].ptr;
339 ulong newaddr = patchto ? (patchto + patchoff) : 0;
340
341 debug("%s: Setting %p to %lx\n", __func__, p, newaddr);
342 *p = newaddr;
343 }
344
345 /* Update CRC32 */
346 efi_update_table_header_crc32(&efi_runtime_services.hdr);
347 }
348
349 /* Relocate EFI runtime to uboot_reloc_base = offset */
efi_runtime_relocate(ulong offset,struct efi_mem_desc * map)350 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map)
351 {
352 #ifdef IS_RELA
353 struct elf_rela *rel = (void*)&__efi_runtime_rel_start;
354 #else
355 struct elf_rel *rel = (void*)&__efi_runtime_rel_start;
356 static ulong lastoff = CONFIG_SYS_TEXT_BASE;
357 #endif
358
359 debug("%s: Relocating to offset=%lx\n", __func__, offset);
360 for (; (ulong)rel < (ulong)&__efi_runtime_rel_stop; rel++) {
361 ulong base = CONFIG_SYS_TEXT_BASE;
362 ulong *p;
363 ulong newaddr;
364
365 p = (void*)((ulong)rel->offset - base) + gd->relocaddr;
366
367 debug("%s: rel->info=%#lx *p=%#lx rel->offset=%p\n", __func__,
368 rel->info, *p, rel->offset);
369
370 switch (rel->info & R_MASK) {
371 case R_RELATIVE:
372 #ifdef IS_RELA
373 newaddr = rel->addend + offset - CONFIG_SYS_TEXT_BASE;
374 #else
375 newaddr = *p - lastoff + offset;
376 #endif
377 break;
378 #ifdef R_ABSOLUTE
379 case R_ABSOLUTE: {
380 ulong symidx = rel->info >> SYM_INDEX;
381 extern struct dyn_sym __dyn_sym_start[];
382 newaddr = __dyn_sym_start[symidx].addr + offset;
383 #ifdef IS_RELA
384 newaddr -= CONFIG_SYS_TEXT_BASE;
385 #endif
386 break;
387 }
388 #endif
389 default:
390 if (!efi_runtime_tobedetached(p))
391 printf("%s: Unknown relocation type %llx\n",
392 __func__, rel->info & R_MASK);
393 continue;
394 }
395
396 /* Check if the relocation is inside bounds */
397 if (map && ((newaddr < map->virtual_start) ||
398 newaddr > (map->virtual_start +
399 (map->num_pages << EFI_PAGE_SHIFT)))) {
400 if (!efi_runtime_tobedetached(p))
401 printf("%s: Relocation at %p is out of "
402 "range (%lx)\n", __func__, p, newaddr);
403 continue;
404 }
405
406 debug("%s: Setting %p to %lx\n", __func__, p, newaddr);
407 *p = newaddr;
408 flush_dcache_range((ulong)p & ~(EFI_CACHELINE_SIZE - 1),
409 ALIGN((ulong)&p[1], EFI_CACHELINE_SIZE));
410 }
411
412 #ifndef IS_RELA
413 lastoff = offset;
414 #endif
415
416 invalidate_icache_all();
417 }
418
419 /**
420 * efi_set_virtual_address_map() - change from physical to virtual mapping
421 *
422 * This function implements the SetVirtualAddressMap() runtime service.
423 *
424 * See the Unified Extensible Firmware Interface (UEFI) specification for
425 * details.
426 *
427 * @memory_map_size: size of the virtual map
428 * @descriptor_size: size of an entry in the map
429 * @descriptor_version: version of the map entries
430 * @virtmap: virtual address mapping information
431 * Return: status code
432 */
efi_set_virtual_address_map(unsigned long memory_map_size,unsigned long descriptor_size,uint32_t descriptor_version,struct efi_mem_desc * virtmap)433 static efi_status_t EFIAPI efi_set_virtual_address_map(
434 unsigned long memory_map_size,
435 unsigned long descriptor_size,
436 uint32_t descriptor_version,
437 struct efi_mem_desc *virtmap)
438 {
439 int n = memory_map_size / descriptor_size;
440 int i;
441 int rt_code_sections = 0;
442
443 EFI_ENTRY("%lx %lx %x %p", memory_map_size, descriptor_size,
444 descriptor_version, virtmap);
445
446 /*
447 * TODO:
448 * Further down we are cheating. While really we should implement
449 * SetVirtualAddressMap() events and ConvertPointer() to allow
450 * dynamically loaded drivers to expose runtime services, we don't
451 * today.
452 *
453 * So let's ensure we see exactly one single runtime section, as
454 * that is the built-in one. If we see more (or less), someone must
455 * have tried adding or removing to that which we don't support yet.
456 * In that case, let's better fail rather than expose broken runtime
457 * services.
458 */
459 for (i = 0; i < n; i++) {
460 struct efi_mem_desc *map = (void*)virtmap +
461 (descriptor_size * i);
462
463 if (map->type == EFI_RUNTIME_SERVICES_CODE)
464 rt_code_sections++;
465 }
466
467 if (rt_code_sections != 1) {
468 /*
469 * We expose exactly one single runtime code section, so
470 * something is definitely going wrong.
471 */
472 return EFI_EXIT(EFI_INVALID_PARAMETER);
473 }
474
475 /* Rebind mmio pointers */
476 for (i = 0; i < n; i++) {
477 struct efi_mem_desc *map = (void*)virtmap +
478 (descriptor_size * i);
479 struct list_head *lhandle;
480 efi_physical_addr_t map_start = map->physical_start;
481 efi_physical_addr_t map_len = map->num_pages << EFI_PAGE_SHIFT;
482 efi_physical_addr_t map_end = map_start + map_len;
483 u64 off = map->virtual_start - map_start;
484
485 /* Adjust all mmio pointers in this region */
486 list_for_each(lhandle, &efi_runtime_mmio) {
487 struct efi_runtime_mmio_list *lmmio;
488
489 lmmio = list_entry(lhandle,
490 struct efi_runtime_mmio_list,
491 link);
492 if ((map_start <= lmmio->paddr) &&
493 (map_end >= lmmio->paddr)) {
494 uintptr_t new_addr = lmmio->paddr + off;
495 *lmmio->ptr = (void *)new_addr;
496 }
497 }
498 if ((map_start <= (uintptr_t)systab.tables) &&
499 (map_end >= (uintptr_t)systab.tables)) {
500 char *ptr = (char *)systab.tables;
501
502 ptr += off;
503 systab.tables = (struct efi_configuration_table *)ptr;
504 }
505 }
506
507 /* Move the actual runtime code over */
508 for (i = 0; i < n; i++) {
509 struct efi_mem_desc *map;
510
511 map = (void*)virtmap + (descriptor_size * i);
512 if (map->type == EFI_RUNTIME_SERVICES_CODE) {
513 ulong new_offset = map->virtual_start -
514 map->physical_start + gd->relocaddr;
515
516 efi_runtime_relocate(new_offset, map);
517 /* Once we're virtual, we can no longer handle
518 complex callbacks */
519 efi_runtime_detach(new_offset);
520 return EFI_EXIT(EFI_SUCCESS);
521 }
522 }
523
524 return EFI_EXIT(EFI_INVALID_PARAMETER);
525 }
526
527 /**
528 * efi_add_runtime_mmio() - add memory-mapped IO region
529 *
530 * This function adds a memory-mapped IO region to the memory map to make it
531 * available at runtime.
532 *
533 * @mmio_ptr: pointer to a pointer to the start of the memory-mapped
534 * IO region
535 * @len: size of the memory-mapped IO region
536 * Returns: status code
537 */
efi_add_runtime_mmio(void * mmio_ptr,u64 len)538 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
539 {
540 struct efi_runtime_mmio_list *newmmio;
541 u64 pages = (len + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
542 uint64_t addr = *(uintptr_t *)mmio_ptr;
543 uint64_t retaddr;
544
545 retaddr = efi_add_memory_map(addr, pages, EFI_MMAP_IO, false);
546 if (retaddr != addr)
547 return EFI_OUT_OF_RESOURCES;
548
549 newmmio = calloc(1, sizeof(*newmmio));
550 if (!newmmio)
551 return EFI_OUT_OF_RESOURCES;
552 newmmio->ptr = mmio_ptr;
553 newmmio->paddr = *(uintptr_t *)mmio_ptr;
554 newmmio->len = len;
555 list_add_tail(&newmmio->link, &efi_runtime_mmio);
556
557 return EFI_SUCCESS;
558 }
559
560 /*
561 * In the second stage, U-Boot has disappeared. To isolate our runtime code
562 * that at this point still exists from the rest, we put it into a special
563 * section.
564 *
565 * !!WARNING!!
566 *
567 * This means that we can not rely on any code outside of this file in any
568 * function or variable below this line.
569 *
570 * Please keep everything fully self-contained and annotated with
571 * __efi_runtime and __efi_runtime_data markers.
572 */
573
574 /*
575 * Relocate the EFI runtime stub to a different place. We need to call this
576 * the first time we expose the runtime interface to a user and on set virtual
577 * address map calls.
578 */
579
580 /**
581 * efi_unimplemented() - replacement function, returns EFI_UNSUPPORTED
582 *
583 * This function is used after SetVirtualAddressMap() is called as replacement
584 * for services that are not available anymore due to constraints of the U-Boot
585 * implementation.
586 *
587 * Return: EFI_UNSUPPORTED
588 */
efi_unimplemented(void)589 static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void)
590 {
591 return EFI_UNSUPPORTED;
592 }
593
594 /**
595 * efi_device_error() - replacement function, returns EFI_DEVICE_ERROR
596 *
597 * This function is used after SetVirtualAddressMap() is called as replacement
598 * for services that are not available anymore due to constraints of the U-Boot
599 * implementation.
600 *
601 * Return: EFI_DEVICE_ERROR
602 */
efi_device_error(void)603 static efi_status_t __efi_runtime EFIAPI efi_device_error(void)
604 {
605 return EFI_DEVICE_ERROR;
606 }
607
608 /**
609 * efi_invalid_parameter() - replacement function, returns EFI_INVALID_PARAMETER
610 *
611 * This function is used after SetVirtualAddressMap() is called as replacement
612 * for services that are not available anymore due to constraints of the U-Boot
613 * implementation.
614 *
615 * Return: EFI_INVALID_PARAMETER
616 */
efi_invalid_parameter(void)617 static efi_status_t __efi_runtime EFIAPI efi_invalid_parameter(void)
618 {
619 return EFI_INVALID_PARAMETER;
620 }
621
622 /**
623 * efi_update_capsule() - process information from operating system
624 *
625 * This function implements the UpdateCapsule() runtime service.
626 *
627 * See the Unified Extensible Firmware Interface (UEFI) specification for
628 * details.
629 *
630 * @capsule_header_array: pointer to array of virtual pointers
631 * @capsule_count: number of pointers in capsule_header_array
632 * @scatter_gather_list: pointer to arry of physical pointers
633 * Returns: status code
634 */
efi_update_capsule(struct efi_capsule_header ** capsule_header_array,efi_uintn_t capsule_count,u64 scatter_gather_list)635 efi_status_t __efi_runtime EFIAPI efi_update_capsule(
636 struct efi_capsule_header **capsule_header_array,
637 efi_uintn_t capsule_count,
638 u64 scatter_gather_list)
639 {
640 return EFI_UNSUPPORTED;
641 }
642
643 /**
644 * efi_query_capsule_caps() - check if capsule is supported
645 *
646 * This function implements the QueryCapsuleCapabilities() runtime service.
647 *
648 * See the Unified Extensible Firmware Interface (UEFI) specification for
649 * details.
650 *
651 * @capsule_header_array: pointer to array of virtual pointers
652 * @capsule_count: number of pointers in capsule_header_array
653 * @maximum_capsule_size: maximum capsule size
654 * @reset_type: type of reset needed for capsule update
655 * Returns: status code
656 */
efi_query_capsule_caps(struct efi_capsule_header ** capsule_header_array,efi_uintn_t capsule_count,u64 * maximum_capsule_size,u32 * reset_type)657 efi_status_t __efi_runtime EFIAPI efi_query_capsule_caps(
658 struct efi_capsule_header **capsule_header_array,
659 efi_uintn_t capsule_count,
660 u64 *maximum_capsule_size,
661 u32 *reset_type)
662 {
663 return EFI_UNSUPPORTED;
664 }
665
666 /**
667 * efi_query_variable_info() - get information about EFI variables
668 *
669 * This function implements the QueryVariableInfo() runtime service.
670 *
671 * See the Unified Extensible Firmware Interface (UEFI) specification for
672 * details.
673 *
674 * @attributes: bitmask to select variables to be
675 * queried
676 * @maximum_variable_storage_size: maximum size of storage area for the
677 * selected variable types
678 * @remaining_variable_storage_size: remaining size of storage are for the
679 * selected variable types
680 * @maximum_variable_size: maximum size of a variable of the
681 * selected type
682 * Returns: status code
683 */
efi_query_variable_info(u32 attributes,u64 * maximum_variable_storage_size,u64 * remaining_variable_storage_size,u64 * maximum_variable_size)684 efi_status_t __efi_runtime EFIAPI efi_query_variable_info(
685 u32 attributes,
686 u64 *maximum_variable_storage_size,
687 u64 *remaining_variable_storage_size,
688 u64 *maximum_variable_size)
689 {
690 return EFI_UNSUPPORTED;
691 }
692
693 struct efi_runtime_services __efi_runtime_data efi_runtime_services = {
694 .hdr = {
695 .signature = EFI_RUNTIME_SERVICES_SIGNATURE,
696 .revision = EFI_SPECIFICATION_VERSION,
697 .headersize = sizeof(struct efi_runtime_services),
698 },
699 .get_time = &efi_get_time_boottime,
700 .set_time = (void *)&efi_device_error,
701 .get_wakeup_time = (void *)&efi_unimplemented,
702 .set_wakeup_time = (void *)&efi_unimplemented,
703 .set_virtual_address_map = &efi_set_virtual_address_map,
704 .convert_pointer = (void *)&efi_invalid_parameter,
705 .get_variable = efi_get_variable,
706 .get_next_variable_name = efi_get_next_variable_name,
707 .set_variable = efi_set_variable,
708 .get_next_high_mono_count = (void *)&efi_device_error,
709 .reset_system = &efi_reset_system_boottime,
710 .update_capsule = efi_update_capsule,
711 .query_capsule_caps = efi_query_capsule_caps,
712 .query_variable_info = efi_query_variable_info,
713 };
714