git.sur5r.net Git - u-boot/blob - lib/efi_loader/efi_boottime.c

   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 /* Task priority level */
  22 static UINTN efi_tpl = TPL_APPLICATION;
  23
  24 /* This list contains all the EFI objects our payload has access to */
  25 LIST_HEAD(efi_obj_list);
  26
  27 /*
  28  * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
  29  * we need to do trickery with caches. Since we don't want to break the EFI
  30  * aware boot path, only apply hacks when loading exiting directly (breaking
  31  * direct Linux EFI booting along the way - oh well).
  32  */
  33 static bool efi_is_direct_boot = true;
  34
  35 /*
  36  * EFI can pass arbitrary additional "tables" containing vendor specific
  37  * information to the payload. One such table is the FDT table which contains
  38  * a pointer to a flattened device tree blob.
  39  *
  40  * In most cases we want to pass an FDT to the payload, so reserve one slot of
  41  * config table space for it. The pointer gets populated by do_bootefi_exec().
  42  */
  43 static struct efi_configuration_table __efi_runtime_data efi_conf_table[2];
  44
  45 #ifdef CONFIG_ARM
  46 /*
  47  * The "gd" pointer lives in a register on ARM and AArch64 that we declare
  48  * fixed when compiling U-Boot. However, the payload does not know about that
  49  * restriction so we need to manually swap its and our view of that register on
  50  * EFI callback entry/exit.
  51  */
  52 static volatile void *efi_gd, *app_gd;
  53 #endif
  54
  55 static int entry_count;
  56 static int nesting_level;
  57
  58 /* Called on every callback entry */
  59 int __efi_entry_check(void)
  60 {
  61         int ret = entry_count++ == 0;
  62 #ifdef CONFIG_ARM
  63         assert(efi_gd);
  64         app_gd = gd;
  65         gd = efi_gd;
  66 #endif
  67         return ret;
  68 }
  69
  70 /* Called on every callback exit */
  71 int __efi_exit_check(void)
  72 {
  73         int ret = --entry_count == 0;
  74 #ifdef CONFIG_ARM
  75         gd = app_gd;
  76 #endif
  77         return ret;
  78 }
  79
  80 /* Called from do_bootefi_exec() */
  81 void efi_save_gd(void)
  82 {
  83 #ifdef CONFIG_ARM
  84         efi_gd = gd;
  85 #endif
  86 }
  87
  88 /*
  89  * Special case handler for error/abort that just forces things back
  90  * to u-boot world so we can dump out an abort msg, without any care
  91  * about returning back to UEFI world.
  92  */
  93 void efi_restore_gd(void)
  94 {
  95 #ifdef CONFIG_ARM
  96         /* Only restore if we're already in EFI context */
  97         if (!efi_gd)
  98                 return;
  99         gd = efi_gd;
 100 #endif
 101 }
 102
 103 /*
 104  * Two spaces per indent level, maxing out at 10.. which ought to be
 105  * enough for anyone ;-)
 106  */
 107 static const char *indent_string(int level)
 108 {
 109         const char *indent = "                    ";
 110         const int max = strlen(indent);
 111         level = min(max, level * 2);
 112         return &indent[max - level];
 113 }
 114
 115 const char *__efi_nesting(void)
 116 {
 117         return indent_string(nesting_level);
 118 }
 119
 120 const char *__efi_nesting_inc(void)
 121 {
 122         return indent_string(nesting_level++);
 123 }
 124
 125 const char *__efi_nesting_dec(void)
 126 {
 127         return indent_string(--nesting_level);
 128 }
 129
 130 /* Low 32 bit */
 131 #define EFI_LOW32(a) (a & 0xFFFFFFFFULL)
 132 /* High 32 bit */
 133 #define EFI_HIGH32(a) (a >> 32)
 134
 135 /*
 136  * 64bit division by 10 implemented as multiplication by 1 / 10
 137  *
 138  * Decimals of one tenth: 0x1 / 0xA = 0x0.19999...
 139  */
 140 #define EFI_TENTH 0x199999999999999A
 141 static u64 efi_div10(u64 a)
 142 {
 143         u64 prod;
 144         u64 rem;
 145         u64 ret;
 146
 147         ret  = EFI_HIGH32(a) * EFI_HIGH32(EFI_TENTH);
 148         prod = EFI_HIGH32(a) * EFI_LOW32(EFI_TENTH);
 149         rem  = EFI_LOW32(prod);
 150         ret += EFI_HIGH32(prod);
 151         prod = EFI_LOW32(a) * EFI_HIGH32(EFI_TENTH);
 152         rem += EFI_LOW32(prod);
 153         ret += EFI_HIGH32(prod);
 154         prod = EFI_LOW32(a) * EFI_LOW32(EFI_TENTH);
 155         rem += EFI_HIGH32(prod);
 156         ret += EFI_HIGH32(rem);
 157         /* Round to nearest integer */
 158         if (rem >= (1 << 31))
 159                 ++ret;
 160         return ret;
 161 }
 162
 163 void efi_signal_event(struct efi_event *event)
 164 {
 165         if (event->notify_function) {
 166                 event->queued = 1;
 167                 /* Check TPL */
 168                 if (efi_tpl >= event->notify_tpl)
 169                         return;
 170                 EFI_CALL_VOID(event->notify_function(event,
 171                                                      event->notify_context));
 172         }
 173         event->queued = 0;
 174 }
 175
 176 static efi_status_t efi_unsupported(const char *funcname)
 177 {
 178         debug("EFI: App called into unimplemented function %s\n", funcname);
 179         return EFI_EXIT(EFI_UNSUPPORTED);
 180 }
 181
 182 static unsigned long EFIAPI efi_raise_tpl(UINTN new_tpl)
 183 {
 184         UINTN old_tpl = efi_tpl;
 185
 186         EFI_ENTRY("0x%zx", new_tpl);
 187
 188         if (new_tpl < efi_tpl)
 189                 debug("WARNING: new_tpl < current_tpl in %s\n", __func__);
 190         efi_tpl = new_tpl;
 191         if (efi_tpl > TPL_HIGH_LEVEL)
 192                 efi_tpl = TPL_HIGH_LEVEL;
 193
 194         EFI_EXIT(EFI_SUCCESS);
 195         return old_tpl;
 196 }
 197
 198 static void EFIAPI efi_restore_tpl(UINTN old_tpl)
 199 {
 200         EFI_ENTRY("0x%zx", old_tpl);
 201
 202         if (old_tpl > efi_tpl)
 203                 debug("WARNING: old_tpl > current_tpl in %s\n", __func__);
 204         efi_tpl = old_tpl;
 205         if (efi_tpl > TPL_HIGH_LEVEL)
 206                 efi_tpl = TPL_HIGH_LEVEL;
 207
 208         EFI_EXIT(EFI_SUCCESS);
 209 }
 210
 211 static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
 212                                                   unsigned long pages,
 213                                                   uint64_t *memory)
 214 {
 215         efi_status_t r;
 216
 217         EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
 218         r = efi_allocate_pages(type, memory_type, pages, memory);
 219         return EFI_EXIT(r);
 220 }
 221
 222 static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
 223                                               unsigned long pages)
 224 {
 225         efi_status_t r;
 226
 227         EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
 228         r = efi_free_pages(memory, pages);
 229         return EFI_EXIT(r);
 230 }
 231
 232 static efi_status_t EFIAPI efi_get_memory_map_ext(
 233                                         unsigned long *memory_map_size,
 234                                         struct efi_mem_desc *memory_map,
 235                                         unsigned long *map_key,
 236                                         unsigned long *descriptor_size,
 237                                         uint32_t *descriptor_version)
 238 {
 239         efi_status_t r;
 240
 241         EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
 242                   map_key, descriptor_size, descriptor_version);
 243         r = efi_get_memory_map(memory_map_size, memory_map, map_key,
 244                                descriptor_size, descriptor_version);
 245         return EFI_EXIT(r);
 246 }
 247
 248 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
 249                                                  unsigned long size,
 250                                                  void **buffer)
 251 {
 252         efi_status_t r;
 253
 254         EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
 255         r = efi_allocate_pool(pool_type, size, buffer);
 256         return EFI_EXIT(r);
 257 }
 258
 259 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
 260 {
 261         efi_status_t r;
 262
 263         EFI_ENTRY("%p", buffer);
 264         r = efi_free_pool(buffer);
 265         return EFI_EXIT(r);
 266 }
 267
 268 /*
 269  * Our event capabilities are very limited. Only a small limited
 270  * number of events is allowed to coexist.
 271  */
 272 static struct efi_event efi_events[16];
 273
 274 efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
 275                               void (EFIAPI *notify_function) (
 276                                         struct efi_event *event,
 277                                         void *context),
 278                               void *notify_context, struct efi_event **event)
 279 {
 280         int i;
 281
 282         if (event == NULL)
 283                 return EFI_INVALID_PARAMETER;
 284
 285         if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
 286                 return EFI_INVALID_PARAMETER;
 287
 288         if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
 289             notify_function == NULL)
 290                 return EFI_INVALID_PARAMETER;
 291
 292         for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
 293                 if (efi_events[i].type)
 294                         continue;
 295                 efi_events[i].type = type;
 296                 efi_events[i].notify_tpl = notify_tpl;
 297                 efi_events[i].notify_function = notify_function;
 298                 efi_events[i].notify_context = notify_context;
 299                 /* Disable timers on bootup */
 300                 efi_events[i].trigger_next = -1ULL;
 301                 efi_events[i].queued = 0;
 302                 efi_events[i].signaled = 0;
 303                 *event = &efi_events[i];
 304                 return EFI_SUCCESS;
 305         }
 306         return EFI_OUT_OF_RESOURCES;
 307 }
 308
 309 static efi_status_t EFIAPI efi_create_event_ext(
 310                         uint32_t type, UINTN notify_tpl,
 311                         void (EFIAPI *notify_function) (
 312                                         struct efi_event *event,
 313                                         void *context),
 314                         void *notify_context, struct efi_event **event)
 315 {
 316         EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
 317                   notify_context);
 318         return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
 319                                          notify_context, event));
 320 }
 321
 322
 323 /*
 324  * Our timers have to work without interrupts, so we check whenever keyboard
 325  * input or disk accesses happen if enough time elapsed for it to fire.
 326  */
 327 void efi_timer_check(void)
 328 {
 329         int i;
 330         u64 now = timer_get_us();
 331
 332         for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
 333                 if (!efi_events[i].type)
 334                         continue;
 335                 if (efi_events[i].queued)
 336                         efi_signal_event(&efi_events[i]);
 337                 if (!(efi_events[i].type & EVT_TIMER) ||
 338                     now < efi_events[i].trigger_next)
 339                         continue;
 340                 switch (efi_events[i].trigger_type) {
 341                 case EFI_TIMER_RELATIVE:
 342                         efi_events[i].trigger_type = EFI_TIMER_STOP;
 343                         break;
 344                 case EFI_TIMER_PERIODIC:
 345                         efi_events[i].trigger_next +=
 346                                 efi_events[i].trigger_time;
 347                         break;
 348                 default:
 349                         continue;
 350                 }
 351                 efi_events[i].signaled = 1;
 352                 efi_signal_event(&efi_events[i]);
 353         }
 354         WATCHDOG_RESET();
 355 }
 356
 357 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
 358                            uint64_t trigger_time)
 359 {
 360         int i;
 361
 362         /*
 363          * The parameter defines a multiple of 100ns.
 364          * We use multiples of 1000ns. So divide by 10.
 365          */
 366         trigger_time = efi_div10(trigger_time);
 367
 368         for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
 369                 if (event != &efi_events[i])
 370                         continue;
 371
 372                 if (!(event->type & EVT_TIMER))
 373                         break;
 374                 switch (type) {
 375                 case EFI_TIMER_STOP:
 376                         event->trigger_next = -1ULL;
 377                         break;
 378                 case EFI_TIMER_PERIODIC:
 379                 case EFI_TIMER_RELATIVE:
 380                         event->trigger_next =
 381                                 timer_get_us() + trigger_time;
 382                         break;
 383                 default:
 384                         return EFI_INVALID_PARAMETER;
 385                 }
 386                 event->trigger_type = type;
 387                 event->trigger_time = trigger_time;
 388                 event->signaled = 0;
 389                 return EFI_SUCCESS;
 390         }
 391         return EFI_INVALID_PARAMETER;
 392 }
 393
 394 static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
 395                                              enum efi_timer_delay type,
 396                                              uint64_t trigger_time)
 397 {
 398         EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
 399         return EFI_EXIT(efi_set_timer(event, type, trigger_time));
 400 }
 401
 402 static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
 403                                               struct efi_event **event,
 404                                               unsigned long *index)
 405 {
 406         int i, j;
 407
 408         EFI_ENTRY("%ld, %p, %p", num_events, event, index);
 409
 410         /* Check parameters */
 411         if (!num_events || !event)
 412                 return EFI_EXIT(EFI_INVALID_PARAMETER);
 413         /* Check TPL */
 414         if (efi_tpl != TPL_APPLICATION)
 415                 return EFI_EXIT(EFI_UNSUPPORTED);
 416         for (i = 0; i < num_events; ++i) {
 417                 for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
 418                         if (event[i] == &efi_events[j])
 419                                 goto known_event;
 420                 }
 421                 return EFI_EXIT(EFI_INVALID_PARAMETER);
 422 known_event:
 423                 if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
 424                         return EFI_EXIT(EFI_INVALID_PARAMETER);
 425                 if (!event[i]->signaled)
 426                         efi_signal_event(event[i]);
 427         }
 428
 429         /* Wait for signal */
 430         for (;;) {
 431                 for (i = 0; i < num_events; ++i) {
 432                         if (event[i]->signaled)
 433                                 goto out;
 434                 }
 435                 /* Allow events to occur. */
 436                 efi_timer_check();
 437         }
 438
 439 out:
 440         /*
 441          * Reset the signal which is passed to the caller to allow periodic
 442          * events to occur.
 443          */
 444         event[i]->signaled = 0;
 445         if (index)
 446                 *index = i;
 447
 448         return EFI_EXIT(EFI_SUCCESS);
 449 }
 450
 451 static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
 452 {
 453         int i;
 454
 455         EFI_ENTRY("%p", event);
 456         for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
 457                 if (event != &efi_events[i])
 458                         continue;
 459                 if (event->signaled)
 460                         break;
 461                 event->signaled = 1;
 462                 if (event->type & EVT_NOTIFY_SIGNAL)
 463                         efi_signal_event(event);
 464                 break;
 465         }
 466         return EFI_EXIT(EFI_SUCCESS);
 467 }
 468
 469 static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
 470 {
 471         int i;
 472
 473         EFI_ENTRY("%p", event);
 474         for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
 475                 if (event == &efi_events[i]) {
 476                         event->type = 0;
 477                         event->trigger_next = -1ULL;
 478                         event->queued = 0;
 479                         event->signaled = 0;
 480                         return EFI_EXIT(EFI_SUCCESS);
 481                 }
 482         }
 483         return EFI_EXIT(EFI_INVALID_PARAMETER);
 484 }
 485
 486 static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
 487 {
 488         int i;
 489
 490         EFI_ENTRY("%p", event);
 491         efi_timer_check();
 492         for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
 493                 if (event != &efi_events[i])
 494                         continue;
 495                 if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
 496                         break;
 497                 if (!event->signaled)
 498                         efi_signal_event(event);
 499                 if (event->signaled)
 500                         return EFI_EXIT(EFI_SUCCESS);
 501                 return EFI_EXIT(EFI_NOT_READY);
 502         }
 503         return EFI_EXIT(EFI_INVALID_PARAMETER);
 504 }
 505
 506 static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
 507                         efi_guid_t *protocol, int protocol_interface_type,
 508                         void *protocol_interface)
 509 {
 510         struct list_head *lhandle;
 511         int i;
 512         efi_status_t r;
 513
 514         if (!handle || !protocol ||
 515             protocol_interface_type != EFI_NATIVE_INTERFACE) {
 516                 r = EFI_INVALID_PARAMETER;
 517                 goto out;
 518         }
 519
 520         /* Create new handle if requested. */
 521         if (!*handle) {
 522                 r = EFI_OUT_OF_RESOURCES;
 523                 goto out;
 524         }
 525         /* Find object. */
 526         list_for_each(lhandle, &efi_obj_list) {
 527                 struct efi_object *efiobj;
 528                 efiobj = list_entry(lhandle, struct efi_object, link);
 529
 530                 if (efiobj->handle != *handle)
 531                         continue;
 532                 /* Check if protocol is already installed on the handle. */
 533                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 534                         struct efi_handler *handler = &efiobj->protocols[i];
 535
 536                         if (!handler->guid)
 537                                 continue;
 538                         if (!guidcmp(handler->guid, protocol)) {
 539                                 r = EFI_INVALID_PARAMETER;
 540                                 goto out;
 541                         }
 542                 }
 543                 /* Install protocol in first empty slot. */
 544                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 545                         struct efi_handler *handler = &efiobj->protocols[i];
 546
 547                         if (handler->guid)
 548                                 continue;
 549
 550                         handler->guid = protocol;
 551                         handler->protocol_interface = protocol_interface;
 552                         r = EFI_SUCCESS;
 553                         goto out;
 554                 }
 555                 r = EFI_OUT_OF_RESOURCES;
 556                 goto out;
 557         }
 558         r = EFI_INVALID_PARAMETER;
 559 out:
 560         return r;
 561 }
 562
 563 static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
 564                         efi_guid_t *protocol, int protocol_interface_type,
 565                         void *protocol_interface)
 566 {
 567         EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
 568                   protocol_interface);
 569
 570         return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
 571                                                        protocol_interface_type,
 572                                                        protocol_interface));
 573 }
 574
 575 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
 576                         efi_guid_t *protocol, void *old_interface,
 577                         void *new_interface)
 578 {
 579         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
 580                   new_interface);
 581         return EFI_EXIT(EFI_ACCESS_DENIED);
 582 }
 583
 584 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
 585                         efi_guid_t *protocol, void *protocol_interface)
 586 {
 587         struct list_head *lhandle;
 588         int i;
 589         efi_status_t r = EFI_NOT_FOUND;
 590
 591         if (!handle || !protocol) {
 592                 r = EFI_INVALID_PARAMETER;
 593                 goto out;
 594         }
 595
 596         list_for_each(lhandle, &efi_obj_list) {
 597                 struct efi_object *efiobj;
 598                 efiobj = list_entry(lhandle, struct efi_object, link);
 599
 600                 if (efiobj->handle != handle)
 601                         continue;
 602
 603                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 604                         struct efi_handler *handler = &efiobj->protocols[i];
 605                         const efi_guid_t *hprotocol = handler->guid;
 606
 607                         if (!hprotocol)
 608                                 continue;
 609                         if (!guidcmp(hprotocol, protocol)) {
 610                                 if (handler->protocol_interface) {
 611                                         r = EFI_ACCESS_DENIED;
 612                                 } else {
 613                                         handler->guid = 0;
 614                                         r = EFI_SUCCESS;
 615                                 }
 616                                 goto out;
 617                         }
 618                 }
 619         }
 620
 621 out:
 622         return r;
 623 }
 624
 625 static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
 626                         efi_guid_t *protocol, void *protocol_interface)
 627 {
 628         EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
 629
 630         return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
 631                                                          protocol_interface));
 632 }
 633
 634 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
 635                                                         struct efi_event *event,
 636                                                         void **registration)
 637 {
 638         EFI_ENTRY("%p, %p, %p", protocol, event, registration);
 639         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 640 }
 641
 642 static int efi_search(enum efi_locate_search_type search_type,
 643                       efi_guid_t *protocol, void *search_key,
 644                       struct efi_object *efiobj)
 645 {
 646         int i;
 647
 648         switch (search_type) {
 649         case all_handles:
 650                 return 0;
 651         case by_register_notify:
 652                 return -1;
 653         case by_protocol:
 654                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 655                         const efi_guid_t *guid = efiobj->protocols[i].guid;
 656                         if (guid && !guidcmp(guid, protocol))
 657                                 return 0;
 658                 }
 659                 return -1;
 660         }
 661
 662         return -1;
 663 }
 664
 665 static efi_status_t efi_locate_handle(
 666                         enum efi_locate_search_type search_type,
 667                         efi_guid_t *protocol, void *search_key,
 668                         unsigned long *buffer_size, efi_handle_t *buffer)
 669 {
 670         struct list_head *lhandle;
 671         unsigned long size = 0;
 672
 673         /* Count how much space we need */
 674         list_for_each(lhandle, &efi_obj_list) {
 675                 struct efi_object *efiobj;
 676                 efiobj = list_entry(lhandle, struct efi_object, link);
 677                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 678                         size += sizeof(void*);
 679                 }
 680         }
 681
 682         if (*buffer_size < size) {
 683                 *buffer_size = size;
 684                 return EFI_BUFFER_TOO_SMALL;
 685         }
 686
 687         *buffer_size = size;
 688         if (size == 0)
 689                 return EFI_NOT_FOUND;
 690
 691         /* Then fill the array */
 692         list_for_each(lhandle, &efi_obj_list) {
 693                 struct efi_object *efiobj;
 694                 efiobj = list_entry(lhandle, struct efi_object, link);
 695                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 696                         *(buffer++) = efiobj->handle;
 697                 }
 698         }
 699
 700         return EFI_SUCCESS;
 701 }
 702
 703 static efi_status_t EFIAPI efi_locate_handle_ext(
 704                         enum efi_locate_search_type search_type,
 705                         efi_guid_t *protocol, void *search_key,
 706                         unsigned long *buffer_size, efi_handle_t *buffer)
 707 {
 708         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 709                   buffer_size, buffer);
 710
 711         return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
 712                         buffer_size, buffer));
 713 }
 714
 715 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
 716                         struct efi_device_path **device_path,
 717                         efi_handle_t *device)
 718 {
 719         EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
 720         return EFI_EXIT(EFI_NOT_FOUND);
 721 }
 722
 723 /* Collapses configuration table entries, removing index i */
 724 static void efi_remove_configuration_table(int i)
 725 {
 726         struct efi_configuration_table *this = &efi_conf_table[i];
 727         struct efi_configuration_table *next = &efi_conf_table[i+1];
 728         struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
 729
 730         memmove(this, next, (ulong)end - (ulong)next);
 731         systab.nr_tables--;
 732 }
 733
 734 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
 735 {
 736         int i;
 737
 738         /* Check for guid override */
 739         for (i = 0; i < systab.nr_tables; i++) {
 740                 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
 741                         if (table)
 742                                 efi_conf_table[i].table = table;
 743                         else
 744                                 efi_remove_configuration_table(i);
 745                         return EFI_SUCCESS;
 746                 }
 747         }
 748
 749         if (!table)
 750                 return EFI_NOT_FOUND;
 751
 752         /* No override, check for overflow */
 753         if (i >= ARRAY_SIZE(efi_conf_table))
 754                 return EFI_OUT_OF_RESOURCES;
 755
 756         /* Add a new entry */
 757         memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
 758         efi_conf_table[i].table = table;
 759         systab.nr_tables = i + 1;
 760
 761         return EFI_SUCCESS;
 762 }
 763
 764 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
 765                                                                void *table)
 766 {
 767         EFI_ENTRY("%p, %p", guid, table);
 768         return EFI_EXIT(efi_install_configuration_table(guid, table));
 769 }
 770
 771 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
 772                                           efi_handle_t parent_image,
 773                                           struct efi_device_path *file_path,
 774                                           void *source_buffer,
 775                                           unsigned long source_size,
 776                                           efi_handle_t *image_handle)
 777 {
 778         static struct efi_object loaded_image_info_obj = {
 779                 .protocols = {
 780                         {
 781                                 .guid = &efi_guid_loaded_image,
 782                         },
 783                 },
 784         };
 785         struct efi_loaded_image *info;
 786         struct efi_object *obj;
 787
 788         EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
 789                   file_path, source_buffer, source_size, image_handle);
 790         info = malloc(sizeof(*info));
 791         loaded_image_info_obj.protocols[0].protocol_interface = info;
 792         obj = malloc(sizeof(loaded_image_info_obj));
 793         memset(info, 0, sizeof(*info));
 794         memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
 795         obj->handle = info;
 796         info->file_path = file_path;
 797         info->reserved = efi_load_pe(source_buffer, info);
 798         if (!info->reserved) {
 799                 free(info);
 800                 free(obj);
 801                 return EFI_EXIT(EFI_UNSUPPORTED);
 802         }
 803
 804         *image_handle = info;
 805         list_add_tail(&obj->link, &efi_obj_list);
 806
 807         return EFI_EXIT(EFI_SUCCESS);
 808 }
 809
 810 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 811                                            unsigned long *exit_data_size,
 812                                            s16 **exit_data)
 813 {
 814         ulong (*entry)(void *image_handle, struct efi_system_table *st);
 815         struct efi_loaded_image *info = image_handle;
 816
 817         EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
 818         entry = info->reserved;
 819
 820         efi_is_direct_boot = false;
 821
 822         /* call the image! */
 823         if (setjmp(&info->exit_jmp)) {
 824                 /* We returned from the child image */
 825                 return EFI_EXIT(info->exit_status);
 826         }
 827
 828         __efi_nesting_dec();
 829         __efi_exit_check();
 830         entry(image_handle, &systab);
 831         __efi_entry_check();
 832         __efi_nesting_inc();
 833
 834         /* Should usually never get here */
 835         return EFI_EXIT(EFI_SUCCESS);
 836 }
 837
 838 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
 839                         efi_status_t exit_status, unsigned long exit_data_size,
 840                         int16_t *exit_data)
 841 {
 842         struct efi_loaded_image *loaded_image_info = (void*)image_handle;
 843
 844         EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
 845                   exit_data_size, exit_data);
 846
 847         /* Make sure entry/exit counts for EFI world cross-overs match */
 848         __efi_exit_check();
 849
 850         /*
 851          * But longjmp out with the U-Boot gd, not the application's, as
 852          * the other end is a setjmp call inside EFI context.
 853          */
 854         efi_restore_gd();
 855
 856         loaded_image_info->exit_status = exit_status;
 857         longjmp(&loaded_image_info->exit_jmp, 1);
 858
 859         panic("EFI application exited");
 860 }
 861
 862 static struct efi_object *efi_search_obj(void *handle)
 863 {
 864         struct list_head *lhandle;
 865
 866         list_for_each(lhandle, &efi_obj_list) {
 867                 struct efi_object *efiobj;
 868                 efiobj = list_entry(lhandle, struct efi_object, link);
 869                 if (efiobj->handle == handle)
 870                         return efiobj;
 871         }
 872
 873         return NULL;
 874 }
 875
 876 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
 877 {
 878         struct efi_object *efiobj;
 879
 880         EFI_ENTRY("%p", image_handle);
 881         efiobj = efi_search_obj(image_handle);
 882         if (efiobj)
 883                 list_del(&efiobj->link);
 884
 885         return EFI_EXIT(EFI_SUCCESS);
 886 }
 887
 888 static void efi_exit_caches(void)
 889 {
 890 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
 891         /*
 892          * Grub on 32bit ARM needs to have caches disabled before jumping into
 893          * a zImage, but does not know of all cache layers. Give it a hand.
 894          */
 895         if (efi_is_direct_boot)
 896                 cleanup_before_linux();
 897 #endif
 898 }
 899
 900 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
 901                                                   unsigned long map_key)
 902 {
 903         EFI_ENTRY("%p, %ld", image_handle, map_key);
 904
 905         board_quiesce_devices();
 906
 907         /* Fix up caches for EFI payloads if necessary */
 908         efi_exit_caches();
 909
 910         /* This stops all lingering devices */
 911         bootm_disable_interrupts();
 912
 913         /* Give the payload some time to boot */
 914         WATCHDOG_RESET();
 915
 916         return EFI_EXIT(EFI_SUCCESS);
 917 }
 918
 919 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
 920 {
 921         static uint64_t mono = 0;
 922         EFI_ENTRY("%p", count);
 923         *count = mono++;
 924         return EFI_EXIT(EFI_SUCCESS);
 925 }
 926
 927 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
 928 {
 929         EFI_ENTRY("%ld", microseconds);
 930         udelay(microseconds);
 931         return EFI_EXIT(EFI_SUCCESS);
 932 }
 933
 934 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
 935                                                   uint64_t watchdog_code,
 936                                                   unsigned long data_size,
 937                                                   uint16_t *watchdog_data)
 938 {
 939         EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
 940                   data_size, watchdog_data);
 941         return efi_unsupported(__func__);
 942 }
 943
 944 static efi_status_t EFIAPI efi_connect_controller(
 945                         efi_handle_t controller_handle,
 946                         efi_handle_t *driver_image_handle,
 947                         struct efi_device_path *remain_device_path,
 948                         bool recursive)
 949 {
 950         EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
 951                   remain_device_path, recursive);
 952         return EFI_EXIT(EFI_NOT_FOUND);
 953 }
 954
 955 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
 956                                                      void *driver_image_handle,
 957                                                      void *child_handle)
 958 {
 959         EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
 960                   child_handle);
 961         return EFI_EXIT(EFI_INVALID_PARAMETER);
 962 }
 963
 964 static efi_status_t EFIAPI efi_close_protocol(void *handle,
 965                                               efi_guid_t *protocol,
 966                                               void *agent_handle,
 967                                               void *controller_handle)
 968 {
 969         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
 970                   controller_handle);
 971         return EFI_EXIT(EFI_NOT_FOUND);
 972 }
 973
 974 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
 975                         efi_guid_t *protocol,
 976                         struct efi_open_protocol_info_entry **entry_buffer,
 977                         unsigned long *entry_count)
 978 {
 979         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
 980                   entry_count);
 981         return EFI_EXIT(EFI_NOT_FOUND);
 982 }
 983
 984 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
 985                         efi_guid_t ***protocol_buffer,
 986                         unsigned long *protocol_buffer_count)
 987 {
 988         unsigned long buffer_size;
 989         struct efi_object *efiobj;
 990         unsigned long i, j;
 991         struct list_head *lhandle;
 992         efi_status_t r;
 993
 994         EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
 995                   protocol_buffer_count);
 996
 997         if (!handle || !protocol_buffer || !protocol_buffer_count)
 998                 return EFI_EXIT(EFI_INVALID_PARAMETER);
 999
1000         *protocol_buffer = NULL;
1001         *protocol_buffer_count = 0;
1002         list_for_each(lhandle, &efi_obj_list) {
1003                 efiobj = list_entry(lhandle, struct efi_object, link);
1004
1005                 if (efiobj->handle != handle)
1006                         continue;
1007
1008                 /* Count protocols */
1009                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1010                         if (efiobj->protocols[i].guid)
1011                                 ++*protocol_buffer_count;
1012                 }
1013                 /* Copy guids */
1014                 if (*protocol_buffer_count) {
1015                         buffer_size = sizeof(efi_guid_t *) *
1016                                         *protocol_buffer_count;
1017                         r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
1018                                               buffer_size,
1019                                               (void **)protocol_buffer);
1020                         if (r != EFI_SUCCESS)
1021                                 return EFI_EXIT(r);
1022                         j = 0;
1023                         for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
1024                                 if (efiobj->protocols[i].guid) {
1025                                         (*protocol_buffer)[j] = (void *)
1026                                                 efiobj->protocols[i].guid;
1027                                         ++j;
1028                                 }
1029                         }
1030                 }
1031                 break;
1032         }
1033
1034         return EFI_EXIT(EFI_SUCCESS);
1035 }
1036
1037 static efi_status_t EFIAPI efi_locate_handle_buffer(
1038                         enum efi_locate_search_type search_type,
1039                         efi_guid_t *protocol, void *search_key,
1040                         unsigned long *no_handles, efi_handle_t **buffer)
1041 {
1042         efi_status_t r;
1043         unsigned long buffer_size = 0;
1044
1045         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
1046                   no_handles, buffer);
1047
1048         if (!no_handles || !buffer) {
1049                 r = EFI_INVALID_PARAMETER;
1050                 goto out;
1051         }
1052         *no_handles = 0;
1053         *buffer = NULL;
1054         r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1055                               *buffer);
1056         if (r != EFI_BUFFER_TOO_SMALL)
1057                 goto out;
1058         r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
1059                               (void **)buffer);
1060         if (r != EFI_SUCCESS)
1061                 goto out;
1062         r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
1063                               *buffer);
1064         if (r == EFI_SUCCESS)
1065                 *no_handles = buffer_size / sizeof(void *);
1066 out:
1067         return EFI_EXIT(r);
1068 }
1069
1070 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
1071                                                void *registration,
1072                                                void **protocol_interface)
1073 {
1074         struct list_head *lhandle;
1075         int i;
1076
1077         EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
1078
1079         if (!protocol || !protocol_interface)
1080                 return EFI_EXIT(EFI_INVALID_PARAMETER);
1081
1082         EFI_PRINT_GUID("protocol", protocol);
1083
1084         list_for_each(lhandle, &efi_obj_list) {
1085                 struct efi_object *efiobj;
1086
1087                 efiobj = list_entry(lhandle, struct efi_object, link);
1088                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1089                         struct efi_handler *handler = &efiobj->protocols[i];
1090
1091                         if (!handler->guid)
1092                                 continue;
1093                         if (!guidcmp(handler->guid, protocol)) {
1094                                 *protocol_interface =
1095                                         handler->protocol_interface;
1096                                 return EFI_EXIT(EFI_SUCCESS);
1097                         }
1098                 }
1099         }
1100         *protocol_interface = NULL;
1101
1102         return EFI_EXIT(EFI_NOT_FOUND);
1103 }
1104
1105 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
1106                         void **handle, ...)
1107 {
1108         EFI_ENTRY("%p", handle);
1109
1110         va_list argptr;
1111         efi_guid_t *protocol;
1112         void *protocol_interface;
1113         efi_status_t r = EFI_SUCCESS;
1114         int i = 0;
1115
1116         if (!handle)
1117                 return EFI_EXIT(EFI_INVALID_PARAMETER);
1118
1119         va_start(argptr, handle);
1120         for (;;) {
1121                 protocol = va_arg(argptr, efi_guid_t*);
1122                 if (!protocol)
1123                         break;
1124                 protocol_interface = va_arg(argptr, void*);
1125                 r = efi_install_protocol_interface(handle, protocol,
1126                                                    EFI_NATIVE_INTERFACE,
1127                                                    protocol_interface);
1128                 if (r != EFI_SUCCESS)
1129                         break;
1130                 i++;
1131         }
1132         va_end(argptr);
1133         if (r == EFI_SUCCESS)
1134                 return EFI_EXIT(r);
1135
1136         /* If an error occured undo all changes. */
1137         va_start(argptr, handle);
1138         for (; i; --i) {
1139                 protocol = va_arg(argptr, efi_guid_t*);
1140                 protocol_interface = va_arg(argptr, void*);
1141                 efi_uninstall_protocol_interface(handle, protocol,
1142                                                  protocol_interface);
1143         }
1144         va_end(argptr);
1145
1146         return EFI_EXIT(r);
1147 }
1148
1149 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
1150                         void *handle, ...)
1151 {
1152         EFI_ENTRY("%p", handle);
1153         return EFI_EXIT(EFI_INVALID_PARAMETER);
1154 }
1155
1156 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
1157                                                unsigned long data_size,
1158                                                uint32_t *crc32_p)
1159 {
1160         EFI_ENTRY("%p, %ld", data, data_size);
1161         *crc32_p = crc32(0, data, data_size);
1162         return EFI_EXIT(EFI_SUCCESS);
1163 }
1164
1165 static void EFIAPI efi_copy_mem(void *destination, void *source,
1166                                 unsigned long length)
1167 {
1168         EFI_ENTRY("%p, %p, %ld", destination, source, length);
1169         memcpy(destination, source, length);
1170 }
1171
1172 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
1173 {
1174         EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
1175         memset(buffer, value, size);
1176 }
1177
1178 static efi_status_t EFIAPI efi_open_protocol(
1179                         void *handle, efi_guid_t *protocol,
1180                         void **protocol_interface, void *agent_handle,
1181                         void *controller_handle, uint32_t attributes)
1182 {
1183         struct list_head *lhandle;
1184         int i;
1185         efi_status_t r = EFI_INVALID_PARAMETER;
1186
1187         EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
1188                   protocol_interface, agent_handle, controller_handle,
1189                   attributes);
1190
1191         if (!handle || !protocol ||
1192             (!protocol_interface && attributes !=
1193              EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
1194                 goto out;
1195         }
1196
1197         EFI_PRINT_GUID("protocol", protocol);
1198
1199         switch (attributes) {
1200         case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
1201         case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
1202         case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
1203                 break;
1204         case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
1205                 if (controller_handle == handle)
1206                         goto out;
1207         case EFI_OPEN_PROTOCOL_BY_DRIVER:
1208         case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
1209                 if (controller_handle == NULL)
1210                         goto out;
1211         case EFI_OPEN_PROTOCOL_EXCLUSIVE:
1212                 if (agent_handle == NULL)
1213                         goto out;
1214                 break;
1215         default:
1216                 goto out;
1217         }
1218
1219         list_for_each(lhandle, &efi_obj_list) {
1220                 struct efi_object *efiobj;
1221                 efiobj = list_entry(lhandle, struct efi_object, link);
1222
1223                 if (efiobj->handle != handle)
1224                         continue;
1225
1226                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
1227                         struct efi_handler *handler = &efiobj->protocols[i];
1228                         const efi_guid_t *hprotocol = handler->guid;
1229                         if (!hprotocol)
1230                                 continue;
1231                         if (!guidcmp(hprotocol, protocol)) {
1232                                 if (attributes !=
1233                                     EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
1234                                         *protocol_interface =
1235                                                 handler->protocol_interface;
1236                                 }
1237                                 r = EFI_SUCCESS;
1238                                 goto out;
1239                         }
1240                 }
1241                 goto unsupported;
1242         }
1243
1244 unsupported:
1245         r = EFI_UNSUPPORTED;
1246 out:
1247         return EFI_EXIT(r);
1248 }
1249
1250 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
1251                                                efi_guid_t *protocol,
1252                                                void **protocol_interface)
1253 {
1254         return efi_open_protocol(handle, protocol, protocol_interface, NULL,
1255                                  NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
1256 }
1257
1258 static const struct efi_boot_services efi_boot_services = {
1259         .hdr = {
1260                 .headersize = sizeof(struct efi_table_hdr),
1261         },
1262         .raise_tpl = efi_raise_tpl,
1263         .restore_tpl = efi_restore_tpl,
1264         .allocate_pages = efi_allocate_pages_ext,
1265         .free_pages = efi_free_pages_ext,
1266         .get_memory_map = efi_get_memory_map_ext,
1267         .allocate_pool = efi_allocate_pool_ext,
1268         .free_pool = efi_free_pool_ext,
1269         .create_event = efi_create_event_ext,
1270         .set_timer = efi_set_timer_ext,
1271         .wait_for_event = efi_wait_for_event,
1272         .signal_event = efi_signal_event_ext,
1273         .close_event = efi_close_event,
1274         .check_event = efi_check_event,
1275         .install_protocol_interface = efi_install_protocol_interface_ext,
1276         .reinstall_protocol_interface = efi_reinstall_protocol_interface,
1277         .uninstall_protocol_interface = efi_uninstall_protocol_interface_ext,
1278         .handle_protocol = efi_handle_protocol,
1279         .reserved = NULL,
1280         .register_protocol_notify = efi_register_protocol_notify,
1281         .locate_handle = efi_locate_handle_ext,
1282         .locate_device_path = efi_locate_device_path,
1283         .install_configuration_table = efi_install_configuration_table_ext,
1284         .load_image = efi_load_image,
1285         .start_image = efi_start_image,
1286         .exit = efi_exit,
1287         .unload_image = efi_unload_image,
1288         .exit_boot_services = efi_exit_boot_services,
1289         .get_next_monotonic_count = efi_get_next_monotonic_count,
1290         .stall = efi_stall,
1291         .set_watchdog_timer = efi_set_watchdog_timer,
1292         .connect_controller = efi_connect_controller,
1293         .disconnect_controller = efi_disconnect_controller,
1294         .open_protocol = efi_open_protocol,
1295         .close_protocol = efi_close_protocol,
1296         .open_protocol_information = efi_open_protocol_information,
1297         .protocols_per_handle = efi_protocols_per_handle,
1298         .locate_handle_buffer = efi_locate_handle_buffer,
1299         .locate_protocol = efi_locate_protocol,
1300         .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
1301         .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
1302         .calculate_crc32 = efi_calculate_crc32,
1303         .copy_mem = efi_copy_mem,
1304         .set_mem = efi_set_mem,
1305 };
1306
1307
1308 static uint16_t __efi_runtime_data firmware_vendor[] =
1309         { 'D','a','s',' ','U','-','b','o','o','t',0 };
1310
1311 struct efi_system_table __efi_runtime_data systab = {
1312         .hdr = {
1313                 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
1314                 .revision = 0x20005, /* 2.5 */
1315                 .headersize = sizeof(struct efi_table_hdr),
1316         },
1317         .fw_vendor = (long)firmware_vendor,
1318         .con_in = (void*)&efi_con_in,
1319         .con_out = (void*)&efi_con_out,
1320         .std_err = (void*)&efi_con_out,
1321         .runtime = (void*)&efi_runtime_services,
1322         .boottime = (void*)&efi_boot_services,
1323         .nr_tables = 0,
1324         .tables = (void*)efi_conf_table,
1325 };