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 /* 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[1];
  41
  42 /*
  43  * The "gd" pointer lives in a register on ARM and AArch64 that we declare
  44  * fixed when compiling U-Boot. However, the payload does not know about that
  45  * restriction so we need to manually swap its and our view of that register on
  46  * EFI callback entry/exit.
  47  */
  48 static volatile void *efi_gd, *app_gd;
  49
  50 /* Called from do_bootefi_exec() */
  51 void efi_save_gd(void)
  52 {
  53         efi_gd = gd;
  54 }
  55
  56 /* Called on every callback entry */
  57 void efi_restore_gd(void)
  58 {
  59         /* Only restore if we're already in EFI context */
  60         if (!efi_gd)
  61                 return;
  62
  63         if (gd != efi_gd)
  64                 app_gd = gd;
  65         gd = efi_gd;
  66 }
  67
  68 /* Called on every callback exit */
  69 efi_status_t efi_exit_func(efi_status_t ret)
  70 {
  71         gd = app_gd;
  72         return ret;
  73 }
  74
  75 static efi_status_t efi_unsupported(const char *funcname)
  76 {
  77         debug("EFI: App called into unimplemented function %s\n", funcname);
  78         return EFI_EXIT(EFI_UNSUPPORTED);
  79 }
  80
  81 static int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
  82 {
  83         return memcmp(g1, g2, sizeof(efi_guid_t));
  84 }
  85
  86 static unsigned long EFIAPI efi_raise_tpl(unsigned long new_tpl)
  87 {
  88         EFI_ENTRY("0x%lx", new_tpl);
  89         return EFI_EXIT(0);
  90 }
  91
  92 static void EFIAPI efi_restore_tpl(unsigned long old_tpl)
  93 {
  94         EFI_ENTRY("0x%lx", old_tpl);
  95         EFI_EXIT(efi_unsupported(__func__));
  96 }
  97
  98 efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
  99                                            unsigned long pages,
 100                                            uint64_t *memory)
 101 {
 102         efi_status_t r;
 103
 104         EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
 105         r = efi_allocate_pages(type, memory_type, pages, memory);
 106         return EFI_EXIT(r);
 107 }
 108
 109 efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory, unsigned long pages)
 110 {
 111         efi_status_t r;
 112
 113         EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
 114         r = efi_free_pages(memory, pages);
 115         return EFI_EXIT(r);
 116 }
 117
 118 efi_status_t EFIAPI efi_get_memory_map_ext(unsigned long *memory_map_size,
 119                                            struct efi_mem_desc *memory_map,
 120                                            unsigned long *map_key,
 121                                            unsigned long *descriptor_size,
 122                                            uint32_t *descriptor_version)
 123 {
 124         efi_status_t r;
 125
 126         EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
 127                   map_key, descriptor_size, descriptor_version);
 128         r = efi_get_memory_map(memory_map_size, memory_map, map_key,
 129                                descriptor_size, descriptor_version);
 130         return EFI_EXIT(r);
 131 }
 132
 133 static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
 134                                                  unsigned long size,
 135                                                  void **buffer)
 136 {
 137         efi_status_t r;
 138
 139         EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
 140         r = efi_allocate_pool(pool_type, size, buffer);
 141         return EFI_EXIT(r);
 142 }
 143
 144 static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
 145 {
 146         efi_status_t r;
 147
 148         EFI_ENTRY("%p", buffer);
 149         r = efi_free_pool(buffer);
 150         return EFI_EXIT(r);
 151 }
 152
 153 /*
 154  * Our event capabilities are very limited. Only support a single
 155  * event to exist, so we don't need to maintain lists.
 156  */
 157 static struct {
 158         enum efi_event_type type;
 159         u32 trigger_type;
 160         u32 trigger_time;
 161         u64 trigger_next;
 162         unsigned long notify_tpl;
 163         void (*notify_function) (void *event, void *context);
 164         void *notify_context;
 165 } efi_event = {
 166         /* Disable timers on bootup */
 167         .trigger_next = -1ULL,
 168 };
 169
 170 static efi_status_t EFIAPI efi_create_event(
 171                         enum efi_event_type type, ulong notify_tpl,
 172                         void (*notify_function) (void *event, void *context),
 173                         void *notify_context, void **event)
 174 {
 175         EFI_ENTRY("%d, 0x%lx, %p, %p", type, notify_tpl, notify_function,
 176                   notify_context);
 177         if (efi_event.notify_function) {
 178                 /* We only support one event at a time */
 179                 return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 180         }
 181
 182         efi_event.type = type;
 183         efi_event.notify_tpl = notify_tpl;
 184         efi_event.notify_function = notify_function;
 185         efi_event.notify_context = notify_context;
 186         *event = &efi_event;
 187
 188         return EFI_EXIT(EFI_SUCCESS);
 189 }
 190
 191 /*
 192  * Our timers have to work without interrupts, so we check whenever keyboard
 193  * input or disk accesses happen if enough time elapsed for it to fire.
 194  */
 195 void efi_timer_check(void)
 196 {
 197         u64 now = timer_get_us();
 198
 199         if (now >= efi_event.trigger_next) {
 200                 /* Triggering! */
 201                 if (efi_event.trigger_type == EFI_TIMER_PERIODIC)
 202                         efi_event.trigger_next += efi_event.trigger_time / 10;
 203                 efi_event.notify_function(&efi_event, efi_event.notify_context);
 204         }
 205
 206         WATCHDOG_RESET();
 207 }
 208
 209 static efi_status_t EFIAPI efi_set_timer(void *event, int type,
 210                                          uint64_t trigger_time)
 211 {
 212         /* We don't have 64bit division available everywhere, so limit timer
 213          * distances to 32bit bits. */
 214         u32 trigger32 = trigger_time;
 215
 216         EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
 217
 218         if (trigger32 < trigger_time) {
 219                 printf("WARNING: Truncating timer from %"PRIx64" to %x\n",
 220                        trigger_time, trigger32);
 221         }
 222
 223         if (event != &efi_event) {
 224                 /* We only support one event at a time */
 225                 return EFI_EXIT(EFI_INVALID_PARAMETER);
 226         }
 227
 228         switch (type) {
 229         case EFI_TIMER_STOP:
 230                 efi_event.trigger_next = -1ULL;
 231                 break;
 232         case EFI_TIMER_PERIODIC:
 233         case EFI_TIMER_RELATIVE:
 234                 efi_event.trigger_next = timer_get_us() + (trigger32 / 10);
 235                 break;
 236         default:
 237                 return EFI_EXIT(EFI_INVALID_PARAMETER);
 238         }
 239         efi_event.trigger_type = type;
 240         efi_event.trigger_time = trigger_time;
 241
 242         return EFI_EXIT(EFI_SUCCESS);
 243 }
 244
 245 static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
 246                                               void *event, unsigned long *index)
 247 {
 248         u64 now;
 249
 250         EFI_ENTRY("%ld, %p, %p", num_events, event, index);
 251
 252         now = timer_get_us();
 253         while (now < efi_event.trigger_next) { }
 254         efi_timer_check();
 255
 256         return EFI_EXIT(EFI_SUCCESS);
 257 }
 258
 259 static efi_status_t EFIAPI efi_signal_event(void *event)
 260 {
 261         EFI_ENTRY("%p", event);
 262         return EFI_EXIT(EFI_SUCCESS);
 263 }
 264
 265 static efi_status_t EFIAPI efi_close_event(void *event)
 266 {
 267         EFI_ENTRY("%p", event);
 268         efi_event.trigger_next = -1ULL;
 269         return EFI_EXIT(EFI_SUCCESS);
 270 }
 271
 272 static efi_status_t EFIAPI efi_check_event(void *event)
 273 {
 274         EFI_ENTRY("%p", event);
 275         return EFI_EXIT(EFI_NOT_READY);
 276 }
 277
 278 static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
 279                         efi_guid_t *protocol, int protocol_interface_type,
 280                         void *protocol_interface)
 281 {
 282         EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
 283                   protocol_interface);
 284         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 285 }
 286 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
 287                         efi_guid_t *protocol, void *old_interface,
 288                         void *new_interface)
 289 {
 290         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
 291                   new_interface);
 292         return EFI_EXIT(EFI_ACCESS_DENIED);
 293 }
 294
 295 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
 296                         efi_guid_t *protocol, void *protocol_interface)
 297 {
 298         EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
 299         return EFI_EXIT(EFI_NOT_FOUND);
 300 }
 301
 302 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
 303                                                         void *event,
 304                                                         void **registration)
 305 {
 306         EFI_ENTRY("%p, %p, %p", protocol, event, registration);
 307         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 308 }
 309
 310 static int efi_search(enum efi_locate_search_type search_type,
 311                       efi_guid_t *protocol, void *search_key,
 312                       struct efi_object *efiobj)
 313 {
 314         int i;
 315
 316         switch (search_type) {
 317         case all_handles:
 318                 return 0;
 319         case by_register_notify:
 320                 return -1;
 321         case by_protocol:
 322                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 323                         const efi_guid_t *guid = efiobj->protocols[i].guid;
 324                         if (guid && !guidcmp(guid, protocol))
 325                                 return 0;
 326                 }
 327                 return -1;
 328         }
 329
 330         return -1;
 331 }
 332
 333 static efi_status_t EFIAPI efi_locate_handle(
 334                         enum efi_locate_search_type search_type,
 335                         efi_guid_t *protocol, void *search_key,
 336                         unsigned long *buffer_size, efi_handle_t *buffer)
 337 {
 338         struct list_head *lhandle;
 339         unsigned long size = 0;
 340
 341         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 342                   buffer_size, buffer);
 343
 344         /* Count how much space we need */
 345         list_for_each(lhandle, &efi_obj_list) {
 346                 struct efi_object *efiobj;
 347                 efiobj = list_entry(lhandle, struct efi_object, link);
 348                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 349                         size += sizeof(void*);
 350                 }
 351         }
 352
 353         if (*buffer_size < size) {
 354                 *buffer_size = size;
 355                 return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
 356         }
 357
 358         /* Then fill the array */
 359         list_for_each(lhandle, &efi_obj_list) {
 360                 struct efi_object *efiobj;
 361                 efiobj = list_entry(lhandle, struct efi_object, link);
 362                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 363                         *(buffer++) = efiobj->handle;
 364                 }
 365         }
 366
 367         *buffer_size = size;
 368         return EFI_EXIT(EFI_SUCCESS);
 369 }
 370
 371 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
 372                         struct efi_device_path **device_path,
 373                         efi_handle_t *device)
 374 {
 375         EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
 376         return EFI_EXIT(EFI_NOT_FOUND);
 377 }
 378
 379 static efi_status_t EFIAPI efi_install_configuration_table(efi_guid_t *guid,
 380                                                            void *table)
 381 {
 382         int i;
 383
 384         EFI_ENTRY("%p, %p", guid, table);
 385
 386         /* Check for guid override */
 387         for (i = 0; i < systab.nr_tables; i++) {
 388                 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
 389                         efi_conf_table[i].table = table;
 390                         return EFI_EXIT(EFI_SUCCESS);
 391                 }
 392         }
 393
 394         /* No override, check for overflow */
 395         if (i >= ARRAY_SIZE(efi_conf_table))
 396                 return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 397
 398         /* Add a new entry */
 399         memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
 400         efi_conf_table[i].table = table;
 401         systab.nr_tables = i;
 402
 403         return EFI_EXIT(EFI_SUCCESS);
 404 }
 405
 406 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
 407                                           efi_handle_t parent_image,
 408                                           struct efi_device_path *file_path,
 409                                           void *source_buffer,
 410                                           unsigned long source_size,
 411                                           efi_handle_t *image_handle)
 412 {
 413         static struct efi_object loaded_image_info_obj = {
 414                 .protocols = {
 415                         {
 416                                 .guid = &efi_guid_loaded_image,
 417                                 .open = &efi_return_handle,
 418                         },
 419                 },
 420         };
 421         struct efi_loaded_image *info;
 422         struct efi_object *obj;
 423
 424         EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
 425                   file_path, source_buffer, source_size, image_handle);
 426         info = malloc(sizeof(*info));
 427         obj = malloc(sizeof(loaded_image_info_obj));
 428         memset(info, 0, sizeof(*info));
 429         memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
 430         obj->handle = info;
 431         info->file_path = file_path;
 432         info->reserved = efi_load_pe(source_buffer, info);
 433         if (!info->reserved) {
 434                 free(info);
 435                 free(obj);
 436                 return EFI_EXIT(EFI_UNSUPPORTED);
 437         }
 438
 439         *image_handle = info;
 440         list_add_tail(&obj->link, &efi_obj_list);
 441
 442         return EFI_EXIT(EFI_SUCCESS);
 443 }
 444
 445 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 446                                            unsigned long *exit_data_size,
 447                                            s16 **exit_data)
 448 {
 449         ulong (*entry)(void *image_handle, struct efi_system_table *st);
 450         struct efi_loaded_image *info = image_handle;
 451
 452         EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
 453         entry = info->reserved;
 454
 455         efi_is_direct_boot = false;
 456
 457         /* call the image! */
 458         if (setjmp(&info->exit_jmp)) {
 459                 /* We returned from the child image */
 460                 return EFI_EXIT(info->exit_status);
 461         }
 462
 463         entry(image_handle, &systab);
 464
 465         /* Should usually never get here */
 466         return EFI_EXIT(EFI_SUCCESS);
 467 }
 468
 469 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
 470                         efi_status_t exit_status, unsigned long exit_data_size,
 471                         int16_t *exit_data)
 472 {
 473         struct efi_loaded_image *loaded_image_info = (void*)image_handle;
 474
 475         EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
 476                   exit_data_size, exit_data);
 477
 478         loaded_image_info->exit_status = exit_status;
 479         longjmp(&loaded_image_info->exit_jmp, 1);
 480
 481         panic("EFI application exited");
 482 }
 483
 484 static struct efi_object *efi_search_obj(void *handle)
 485 {
 486         struct list_head *lhandle;
 487
 488         list_for_each(lhandle, &efi_obj_list) {
 489                 struct efi_object *efiobj;
 490                 efiobj = list_entry(lhandle, struct efi_object, link);
 491                 if (efiobj->handle == handle)
 492                         return efiobj;
 493         }
 494
 495         return NULL;
 496 }
 497
 498 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
 499 {
 500         struct efi_object *efiobj;
 501
 502         EFI_ENTRY("%p", image_handle);
 503         efiobj = efi_search_obj(image_handle);
 504         if (efiobj)
 505                 list_del(&efiobj->link);
 506
 507         return EFI_EXIT(EFI_SUCCESS);
 508 }
 509
 510 static void efi_exit_caches(void)
 511 {
 512 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
 513         /*
 514          * Grub on 32bit ARM needs to have caches disabled before jumping into
 515          * a zImage, but does not know of all cache layers. Give it a hand.
 516          */
 517         if (efi_is_direct_boot)
 518                 cleanup_before_linux();
 519 #endif
 520 }
 521
 522 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
 523                                                   unsigned long map_key)
 524 {
 525         EFI_ENTRY("%p, %ld", image_handle, map_key);
 526
 527         /* Fix up caches for EFI payloads if necessary */
 528         efi_exit_caches();
 529
 530         /* This stops all lingering devices */
 531         bootm_disable_interrupts();
 532
 533         /* Give the payload some time to boot */
 534         WATCHDOG_RESET();
 535
 536         return EFI_EXIT(EFI_SUCCESS);
 537 }
 538
 539 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
 540 {
 541         static uint64_t mono = 0;
 542         EFI_ENTRY("%p", count);
 543         *count = mono++;
 544         return EFI_EXIT(EFI_SUCCESS);
 545 }
 546
 547 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
 548 {
 549         EFI_ENTRY("%ld", microseconds);
 550         udelay(microseconds);
 551         return EFI_EXIT(EFI_SUCCESS);
 552 }
 553
 554 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
 555                                                   uint64_t watchdog_code,
 556                                                   unsigned long data_size,
 557                                                   uint16_t *watchdog_data)
 558 {
 559         EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
 560                   data_size, watchdog_data);
 561         return EFI_EXIT(efi_unsupported(__func__));
 562 }
 563
 564 static efi_status_t EFIAPI efi_connect_controller(
 565                         efi_handle_t controller_handle,
 566                         efi_handle_t *driver_image_handle,
 567                         struct efi_device_path *remain_device_path,
 568                         bool recursive)
 569 {
 570         EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
 571                   remain_device_path, recursive);
 572         return EFI_EXIT(EFI_NOT_FOUND);
 573 }
 574
 575 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
 576                                                      void *driver_image_handle,
 577                                                      void *child_handle)
 578 {
 579         EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
 580                   child_handle);
 581         return EFI_EXIT(EFI_INVALID_PARAMETER);
 582 }
 583
 584 static efi_status_t EFIAPI efi_close_protocol(void *handle,
 585                                               efi_guid_t *protocol,
 586                                               void *agent_handle,
 587                                               void *controller_handle)
 588 {
 589         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
 590                   controller_handle);
 591         return EFI_EXIT(EFI_NOT_FOUND);
 592 }
 593
 594 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
 595                         efi_guid_t *protocol,
 596                         struct efi_open_protocol_info_entry **entry_buffer,
 597                         unsigned long *entry_count)
 598 {
 599         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
 600                   entry_count);
 601         return EFI_EXIT(EFI_NOT_FOUND);
 602 }
 603
 604 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
 605                         efi_guid_t ***protocol_buffer,
 606                         unsigned long *protocol_buffer_count)
 607 {
 608         EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
 609                   protocol_buffer_count);
 610         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 611 }
 612
 613 static efi_status_t EFIAPI efi_locate_handle_buffer(
 614                         enum efi_locate_search_type search_type,
 615                         efi_guid_t *protocol, void *search_key,
 616                         unsigned long *no_handles, efi_handle_t **buffer)
 617 {
 618         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 619                   no_handles, buffer);
 620         return EFI_EXIT(EFI_NOT_FOUND);
 621 }
 622
 623 static struct efi_class_map efi_class_maps[] = {
 624         {
 625                 .guid = &efi_guid_console_control,
 626                 .interface = &efi_console_control
 627         },
 628 };
 629
 630 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
 631                                                void *registration,
 632                                                void **protocol_interface)
 633 {
 634         int i;
 635
 636         EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
 637         for (i = 0; i < ARRAY_SIZE(efi_class_maps); i++) {
 638                 struct efi_class_map *curmap = &efi_class_maps[i];
 639                 if (!guidcmp(protocol, curmap->guid)) {
 640                         *protocol_interface = (void*)curmap->interface;
 641                         return EFI_EXIT(EFI_SUCCESS);
 642                 }
 643         }
 644
 645         return EFI_EXIT(EFI_NOT_FOUND);
 646 }
 647
 648 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
 649                         void **handle, ...)
 650 {
 651         EFI_ENTRY("%p", handle);
 652         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 653 }
 654
 655 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
 656                         void *handle, ...)
 657 {
 658         EFI_ENTRY("%p", handle);
 659         return EFI_EXIT(EFI_INVALID_PARAMETER);
 660 }
 661
 662 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
 663                                                unsigned long data_size,
 664                                                uint32_t *crc32_p)
 665 {
 666         EFI_ENTRY("%p, %ld", data, data_size);
 667         *crc32_p = crc32(0, data, data_size);
 668         return EFI_EXIT(EFI_SUCCESS);
 669 }
 670
 671 static void EFIAPI efi_copy_mem(void *destination, void *source,
 672                                 unsigned long length)
 673 {
 674         EFI_ENTRY("%p, %p, %ld", destination, source, length);
 675         memcpy(destination, source, length);
 676 }
 677
 678 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
 679 {
 680         EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
 681         memset(buffer, value, size);
 682 }
 683
 684 static efi_status_t EFIAPI efi_open_protocol(
 685                         void *handle, efi_guid_t *protocol,
 686                         void **protocol_interface, void *agent_handle,
 687                         void *controller_handle, uint32_t attributes)
 688 {
 689         struct list_head *lhandle;
 690         int i;
 691         efi_status_t r = EFI_UNSUPPORTED;
 692
 693         EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
 694                   protocol_interface, agent_handle, controller_handle,
 695                   attributes);
 696         list_for_each(lhandle, &efi_obj_list) {
 697                 struct efi_object *efiobj;
 698                 efiobj = list_entry(lhandle, struct efi_object, link);
 699
 700                 if (efiobj->handle != handle)
 701                         continue;
 702
 703                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 704                         struct efi_handler *handler = &efiobj->protocols[i];
 705                         const efi_guid_t *hprotocol = handler->guid;
 706                         if (!hprotocol)
 707                                 break;
 708                         if (!guidcmp(hprotocol, protocol)) {
 709                                 r = handler->open(handle, protocol,
 710                                     protocol_interface, agent_handle,
 711                                     controller_handle, attributes);
 712                                 goto out;
 713                         }
 714                 }
 715         }
 716
 717 out:
 718         return EFI_EXIT(r);
 719 }
 720
 721 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
 722                                                efi_guid_t *protocol,
 723                                                void **protocol_interface)
 724 {
 725         return efi_open_protocol(handle, protocol, protocol_interface,
 726                                  NULL, NULL, 0);
 727 }
 728
 729 static const struct efi_boot_services efi_boot_services = {
 730         .hdr = {
 731                 .headersize = sizeof(struct efi_table_hdr),
 732         },
 733         .raise_tpl = efi_raise_tpl,
 734         .restore_tpl = efi_restore_tpl,
 735         .allocate_pages = efi_allocate_pages_ext,
 736         .free_pages = efi_free_pages_ext,
 737         .get_memory_map = efi_get_memory_map_ext,
 738         .allocate_pool = efi_allocate_pool_ext,
 739         .free_pool = efi_free_pool_ext,
 740         .create_event = efi_create_event,
 741         .set_timer = efi_set_timer,
 742         .wait_for_event = efi_wait_for_event,
 743         .signal_event = efi_signal_event,
 744         .close_event = efi_close_event,
 745         .check_event = efi_check_event,
 746         .install_protocol_interface = efi_install_protocol_interface,
 747         .reinstall_protocol_interface = efi_reinstall_protocol_interface,
 748         .uninstall_protocol_interface = efi_uninstall_protocol_interface,
 749         .handle_protocol = efi_handle_protocol,
 750         .reserved = NULL,
 751         .register_protocol_notify = efi_register_protocol_notify,
 752         .locate_handle = efi_locate_handle,
 753         .locate_device_path = efi_locate_device_path,
 754         .install_configuration_table = efi_install_configuration_table,
 755         .load_image = efi_load_image,
 756         .start_image = efi_start_image,
 757         .exit = efi_exit,
 758         .unload_image = efi_unload_image,
 759         .exit_boot_services = efi_exit_boot_services,
 760         .get_next_monotonic_count = efi_get_next_monotonic_count,
 761         .stall = efi_stall,
 762         .set_watchdog_timer = efi_set_watchdog_timer,
 763         .connect_controller = efi_connect_controller,
 764         .disconnect_controller = efi_disconnect_controller,
 765         .open_protocol = efi_open_protocol,
 766         .close_protocol = efi_close_protocol,
 767         .open_protocol_information = efi_open_protocol_information,
 768         .protocols_per_handle = efi_protocols_per_handle,
 769         .locate_handle_buffer = efi_locate_handle_buffer,
 770         .locate_protocol = efi_locate_protocol,
 771         .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
 772         .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
 773         .calculate_crc32 = efi_calculate_crc32,
 774         .copy_mem = efi_copy_mem,
 775         .set_mem = efi_set_mem,
 776 };
 777
 778
 779 static uint16_t EFI_RUNTIME_DATA firmware_vendor[] =
 780         { 'D','a','s',' ','U','-','b','o','o','t',0 };
 781
 782 struct efi_system_table EFI_RUNTIME_DATA systab = {
 783         .hdr = {
 784                 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
 785                 .revision = 0x20005, /* 2.5 */
 786                 .headersize = sizeof(struct efi_table_hdr),
 787         },
 788         .fw_vendor = (long)firmware_vendor,
 789         .con_in = (void*)&efi_con_in,
 790         .con_out = (void*)&efi_con_out,
 791         .std_err = (void*)&efi_con_out,
 792         .runtime = (void*)&efi_runtime_services,
 793         .boottime = (void*)&efi_boot_services,
 794         .nr_tables = 0,
 795         .tables = (void*)efi_conf_table,
 796 };