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 /* 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 };