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         struct list_head *lhandle;
 307         int i;
 308         efi_status_t r;
 309
 310         EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
 311                   protocol_interface);
 312
 313         if (!handle || !protocol ||
 314             protocol_interface_type != EFI_NATIVE_INTERFACE) {
 315                 r = EFI_INVALID_PARAMETER;
 316                 goto out;
 317         }
 318
 319         /* Create new handle if requested. */
 320         if (!*handle) {
 321                 r = EFI_OUT_OF_RESOURCES;
 322                 goto out;
 323         }
 324         /* Find object. */
 325         list_for_each(lhandle, &efi_obj_list) {
 326                 struct efi_object *efiobj;
 327                 efiobj = list_entry(lhandle, struct efi_object, link);
 328
 329                 if (efiobj->handle != *handle)
 330                         continue;
 331                 /* Check if protocol is already installed on the handle. */
 332                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 333                         struct efi_handler *handler = &efiobj->protocols[i];
 334
 335                         if (!handler->guid)
 336                                 continue;
 337                         if (!guidcmp(handler->guid, protocol)) {
 338                                 r = EFI_INVALID_PARAMETER;
 339                                 goto out;
 340                         }
 341                 }
 342                 /* Install protocol in first empty slot. */
 343                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 344                         struct efi_handler *handler = &efiobj->protocols[i];
 345
 346                         if (handler->guid)
 347                                 continue;
 348
 349                         handler->guid = protocol;
 350                         handler->protocol_interface = protocol_interface;
 351                         r = EFI_SUCCESS;
 352                         goto out;
 353                 }
 354                 r = EFI_OUT_OF_RESOURCES;
 355                 goto out;
 356         }
 357         r = EFI_INVALID_PARAMETER;
 358 out:
 359         return EFI_EXIT(r);
 360 }
 361
 362 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
 363                         efi_guid_t *protocol, void *old_interface,
 364                         void *new_interface)
 365 {
 366         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
 367                   new_interface);
 368         return EFI_EXIT(EFI_ACCESS_DENIED);
 369 }
 370
 371 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
 372                         efi_guid_t *protocol, void *protocol_interface)
 373 {
 374         struct list_head *lhandle;
 375         int i;
 376         efi_status_t r = EFI_NOT_FOUND;
 377
 378         EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
 379
 380         if (!handle || !protocol) {
 381                 r = EFI_INVALID_PARAMETER;
 382                 goto out;
 383         }
 384
 385         list_for_each(lhandle, &efi_obj_list) {
 386                 struct efi_object *efiobj;
 387                 efiobj = list_entry(lhandle, struct efi_object, link);
 388
 389                 if (efiobj->handle != handle)
 390                         continue;
 391
 392                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 393                         struct efi_handler *handler = &efiobj->protocols[i];
 394                         const efi_guid_t *hprotocol = handler->guid;
 395
 396                         if (!hprotocol)
 397                                 continue;
 398                         if (!guidcmp(hprotocol, protocol)) {
 399                                 if (handler->protocol_interface) {
 400                                         r = EFI_ACCESS_DENIED;
 401                                 } else {
 402                                         handler->guid = 0;
 403                                         r = EFI_SUCCESS;
 404                                 }
 405                                 goto out;
 406                         }
 407                 }
 408         }
 409
 410 out:
 411         return EFI_EXIT(r);
 412 }
 413
 414 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
 415                                                         void *event,
 416                                                         void **registration)
 417 {
 418         EFI_ENTRY("%p, %p, %p", protocol, event, registration);
 419         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 420 }
 421
 422 static int efi_search(enum efi_locate_search_type search_type,
 423                       efi_guid_t *protocol, void *search_key,
 424                       struct efi_object *efiobj)
 425 {
 426         int i;
 427
 428         switch (search_type) {
 429         case all_handles:
 430                 return 0;
 431         case by_register_notify:
 432                 return -1;
 433         case by_protocol:
 434                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 435                         const efi_guid_t *guid = efiobj->protocols[i].guid;
 436                         if (guid && !guidcmp(guid, protocol))
 437                                 return 0;
 438                 }
 439                 return -1;
 440         }
 441
 442         return -1;
 443 }
 444
 445 static efi_status_t EFIAPI efi_locate_handle(
 446                         enum efi_locate_search_type search_type,
 447                         efi_guid_t *protocol, void *search_key,
 448                         unsigned long *buffer_size, efi_handle_t *buffer)
 449 {
 450         struct list_head *lhandle;
 451         unsigned long size = 0;
 452
 453         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 454                   buffer_size, buffer);
 455
 456         /* Count how much space we need */
 457         list_for_each(lhandle, &efi_obj_list) {
 458                 struct efi_object *efiobj;
 459                 efiobj = list_entry(lhandle, struct efi_object, link);
 460                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 461                         size += sizeof(void*);
 462                 }
 463         }
 464
 465         if (*buffer_size < size) {
 466                 *buffer_size = size;
 467                 return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
 468         }
 469
 470         /* Then fill the array */
 471         list_for_each(lhandle, &efi_obj_list) {
 472                 struct efi_object *efiobj;
 473                 efiobj = list_entry(lhandle, struct efi_object, link);
 474                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 475                         *(buffer++) = efiobj->handle;
 476                 }
 477         }
 478
 479         *buffer_size = size;
 480         return EFI_EXIT(EFI_SUCCESS);
 481 }
 482
 483 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
 484                         struct efi_device_path **device_path,
 485                         efi_handle_t *device)
 486 {
 487         EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
 488         return EFI_EXIT(EFI_NOT_FOUND);
 489 }
 490
 491 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
 492 {
 493         int i;
 494
 495         /* Check for guid override */
 496         for (i = 0; i < systab.nr_tables; i++) {
 497                 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
 498                         efi_conf_table[i].table = table;
 499                         return EFI_SUCCESS;
 500                 }
 501         }
 502
 503         /* No override, check for overflow */
 504         if (i >= ARRAY_SIZE(efi_conf_table))
 505                 return EFI_OUT_OF_RESOURCES;
 506
 507         /* Add a new entry */
 508         memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
 509         efi_conf_table[i].table = table;
 510         systab.nr_tables = i + 1;
 511
 512         return EFI_SUCCESS;
 513 }
 514
 515 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
 516                                                                void *table)
 517 {
 518         EFI_ENTRY("%p, %p", guid, table);
 519         return EFI_EXIT(efi_install_configuration_table(guid, table));
 520 }
 521
 522 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
 523                                           efi_handle_t parent_image,
 524                                           struct efi_device_path *file_path,
 525                                           void *source_buffer,
 526                                           unsigned long source_size,
 527                                           efi_handle_t *image_handle)
 528 {
 529         static struct efi_object loaded_image_info_obj = {
 530                 .protocols = {
 531                         {
 532                                 .guid = &efi_guid_loaded_image,
 533                         },
 534                 },
 535         };
 536         struct efi_loaded_image *info;
 537         struct efi_object *obj;
 538
 539         EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
 540                   file_path, source_buffer, source_size, image_handle);
 541         info = malloc(sizeof(*info));
 542         loaded_image_info_obj.protocols[0].protocol_interface = info;
 543         obj = malloc(sizeof(loaded_image_info_obj));
 544         memset(info, 0, sizeof(*info));
 545         memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
 546         obj->handle = info;
 547         info->file_path = file_path;
 548         info->reserved = efi_load_pe(source_buffer, info);
 549         if (!info->reserved) {
 550                 free(info);
 551                 free(obj);
 552                 return EFI_EXIT(EFI_UNSUPPORTED);
 553         }
 554
 555         *image_handle = info;
 556         list_add_tail(&obj->link, &efi_obj_list);
 557
 558         return EFI_EXIT(EFI_SUCCESS);
 559 }
 560
 561 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 562                                            unsigned long *exit_data_size,
 563                                            s16 **exit_data)
 564 {
 565         ulong (*entry)(void *image_handle, struct efi_system_table *st);
 566         struct efi_loaded_image *info = image_handle;
 567
 568         EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
 569         entry = info->reserved;
 570
 571         efi_is_direct_boot = false;
 572
 573         /* call the image! */
 574         if (setjmp(&info->exit_jmp)) {
 575                 /* We returned from the child image */
 576                 return EFI_EXIT(info->exit_status);
 577         }
 578
 579         entry(image_handle, &systab);
 580
 581         /* Should usually never get here */
 582         return EFI_EXIT(EFI_SUCCESS);
 583 }
 584
 585 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
 586                         efi_status_t exit_status, unsigned long exit_data_size,
 587                         int16_t *exit_data)
 588 {
 589         struct efi_loaded_image *loaded_image_info = (void*)image_handle;
 590
 591         EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
 592                   exit_data_size, exit_data);
 593
 594         loaded_image_info->exit_status = exit_status;
 595         longjmp(&loaded_image_info->exit_jmp, 1);
 596
 597         panic("EFI application exited");
 598 }
 599
 600 static struct efi_object *efi_search_obj(void *handle)
 601 {
 602         struct list_head *lhandle;
 603
 604         list_for_each(lhandle, &efi_obj_list) {
 605                 struct efi_object *efiobj;
 606                 efiobj = list_entry(lhandle, struct efi_object, link);
 607                 if (efiobj->handle == handle)
 608                         return efiobj;
 609         }
 610
 611         return NULL;
 612 }
 613
 614 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
 615 {
 616         struct efi_object *efiobj;
 617
 618         EFI_ENTRY("%p", image_handle);
 619         efiobj = efi_search_obj(image_handle);
 620         if (efiobj)
 621                 list_del(&efiobj->link);
 622
 623         return EFI_EXIT(EFI_SUCCESS);
 624 }
 625
 626 static void efi_exit_caches(void)
 627 {
 628 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
 629         /*
 630          * Grub on 32bit ARM needs to have caches disabled before jumping into
 631          * a zImage, but does not know of all cache layers. Give it a hand.
 632          */
 633         if (efi_is_direct_boot)
 634                 cleanup_before_linux();
 635 #endif
 636 }
 637
 638 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
 639                                                   unsigned long map_key)
 640 {
 641         EFI_ENTRY("%p, %ld", image_handle, map_key);
 642
 643         board_quiesce_devices();
 644
 645         /* Fix up caches for EFI payloads if necessary */
 646         efi_exit_caches();
 647
 648         /* This stops all lingering devices */
 649         bootm_disable_interrupts();
 650
 651         /* Give the payload some time to boot */
 652         WATCHDOG_RESET();
 653
 654         return EFI_EXIT(EFI_SUCCESS);
 655 }
 656
 657 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
 658 {
 659         static uint64_t mono = 0;
 660         EFI_ENTRY("%p", count);
 661         *count = mono++;
 662         return EFI_EXIT(EFI_SUCCESS);
 663 }
 664
 665 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
 666 {
 667         EFI_ENTRY("%ld", microseconds);
 668         udelay(microseconds);
 669         return EFI_EXIT(EFI_SUCCESS);
 670 }
 671
 672 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
 673                                                   uint64_t watchdog_code,
 674                                                   unsigned long data_size,
 675                                                   uint16_t *watchdog_data)
 676 {
 677         EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
 678                   data_size, watchdog_data);
 679         return EFI_EXIT(efi_unsupported(__func__));
 680 }
 681
 682 static efi_status_t EFIAPI efi_connect_controller(
 683                         efi_handle_t controller_handle,
 684                         efi_handle_t *driver_image_handle,
 685                         struct efi_device_path *remain_device_path,
 686                         bool recursive)
 687 {
 688         EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
 689                   remain_device_path, recursive);
 690         return EFI_EXIT(EFI_NOT_FOUND);
 691 }
 692
 693 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
 694                                                      void *driver_image_handle,
 695                                                      void *child_handle)
 696 {
 697         EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
 698                   child_handle);
 699         return EFI_EXIT(EFI_INVALID_PARAMETER);
 700 }
 701
 702 static efi_status_t EFIAPI efi_close_protocol(void *handle,
 703                                               efi_guid_t *protocol,
 704                                               void *agent_handle,
 705                                               void *controller_handle)
 706 {
 707         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
 708                   controller_handle);
 709         return EFI_EXIT(EFI_NOT_FOUND);
 710 }
 711
 712 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
 713                         efi_guid_t *protocol,
 714                         struct efi_open_protocol_info_entry **entry_buffer,
 715                         unsigned long *entry_count)
 716 {
 717         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
 718                   entry_count);
 719         return EFI_EXIT(EFI_NOT_FOUND);
 720 }
 721
 722 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
 723                         efi_guid_t ***protocol_buffer,
 724                         unsigned long *protocol_buffer_count)
 725 {
 726         EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
 727                   protocol_buffer_count);
 728         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 729 }
 730
 731 static efi_status_t EFIAPI efi_locate_handle_buffer(
 732                         enum efi_locate_search_type search_type,
 733                         efi_guid_t *protocol, void *search_key,
 734                         unsigned long *no_handles, efi_handle_t **buffer)
 735 {
 736         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 737                   no_handles, buffer);
 738         return EFI_EXIT(EFI_NOT_FOUND);
 739 }
 740
 741 static struct efi_class_map efi_class_maps[] = {
 742         {
 743                 .guid = &efi_guid_console_control,
 744                 .interface = &efi_console_control
 745         },
 746 };
 747
 748 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
 749                                                void *registration,
 750                                                void **protocol_interface)
 751 {
 752         int i;
 753
 754         EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
 755         for (i = 0; i < ARRAY_SIZE(efi_class_maps); i++) {
 756                 struct efi_class_map *curmap = &efi_class_maps[i];
 757                 if (!guidcmp(protocol, curmap->guid)) {
 758                         *protocol_interface = (void*)curmap->interface;
 759                         return EFI_EXIT(EFI_SUCCESS);
 760                 }
 761         }
 762
 763         return EFI_EXIT(EFI_NOT_FOUND);
 764 }
 765
 766 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
 767                         void **handle, ...)
 768 {
 769         EFI_ENTRY("%p", handle);
 770         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 771 }
 772
 773 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
 774                         void *handle, ...)
 775 {
 776         EFI_ENTRY("%p", handle);
 777         return EFI_EXIT(EFI_INVALID_PARAMETER);
 778 }
 779
 780 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
 781                                                unsigned long data_size,
 782                                                uint32_t *crc32_p)
 783 {
 784         EFI_ENTRY("%p, %ld", data, data_size);
 785         *crc32_p = crc32(0, data, data_size);
 786         return EFI_EXIT(EFI_SUCCESS);
 787 }
 788
 789 static void EFIAPI efi_copy_mem(void *destination, void *source,
 790                                 unsigned long length)
 791 {
 792         EFI_ENTRY("%p, %p, %ld", destination, source, length);
 793         memcpy(destination, source, length);
 794 }
 795
 796 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
 797 {
 798         EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
 799         memset(buffer, value, size);
 800 }
 801
 802 static efi_status_t EFIAPI efi_open_protocol(
 803                         void *handle, efi_guid_t *protocol,
 804                         void **protocol_interface, void *agent_handle,
 805                         void *controller_handle, uint32_t attributes)
 806 {
 807         struct list_head *lhandle;
 808         int i;
 809         efi_status_t r = EFI_INVALID_PARAMETER;
 810
 811         EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
 812                   protocol_interface, agent_handle, controller_handle,
 813                   attributes);
 814
 815         if (!handle || !protocol ||
 816             (!protocol_interface && attributes !=
 817              EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
 818                 goto out;
 819         }
 820
 821         switch (attributes) {
 822         case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
 823         case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
 824         case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
 825                 break;
 826         case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
 827                 if (controller_handle == handle)
 828                         goto out;
 829         case EFI_OPEN_PROTOCOL_BY_DRIVER:
 830         case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
 831                 if (controller_handle == NULL)
 832                         goto out;
 833         case EFI_OPEN_PROTOCOL_EXCLUSIVE:
 834                 if (agent_handle == NULL)
 835                         goto out;
 836                 break;
 837         default:
 838                 goto out;
 839         }
 840
 841         list_for_each(lhandle, &efi_obj_list) {
 842                 struct efi_object *efiobj;
 843                 efiobj = list_entry(lhandle, struct efi_object, link);
 844
 845                 if (efiobj->handle != handle)
 846                         continue;
 847
 848                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 849                         struct efi_handler *handler = &efiobj->protocols[i];
 850                         const efi_guid_t *hprotocol = handler->guid;
 851                         if (!hprotocol)
 852                                 continue;
 853                         if (!guidcmp(hprotocol, protocol)) {
 854                                 if (attributes !=
 855                                     EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
 856                                         *protocol_interface =
 857                                                 handler->protocol_interface;
 858                                 }
 859                                 r = EFI_SUCCESS;
 860                                 goto out;
 861                         }
 862                 }
 863                 goto unsupported;
 864         }
 865
 866 unsupported:
 867         r = EFI_UNSUPPORTED;
 868 out:
 869         return EFI_EXIT(r);
 870 }
 871
 872 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
 873                                                efi_guid_t *protocol,
 874                                                void **protocol_interface)
 875 {
 876         return efi_open_protocol(handle, protocol, protocol_interface, NULL,
 877                                  NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
 878 }
 879
 880 static const struct efi_boot_services efi_boot_services = {
 881         .hdr = {
 882                 .headersize = sizeof(struct efi_table_hdr),
 883         },
 884         .raise_tpl = efi_raise_tpl,
 885         .restore_tpl = efi_restore_tpl,
 886         .allocate_pages = efi_allocate_pages_ext,
 887         .free_pages = efi_free_pages_ext,
 888         .get_memory_map = efi_get_memory_map_ext,
 889         .allocate_pool = efi_allocate_pool_ext,
 890         .free_pool = efi_free_pool_ext,
 891         .create_event = efi_create_event,
 892         .set_timer = efi_set_timer,
 893         .wait_for_event = efi_wait_for_event,
 894         .signal_event = efi_signal_event,
 895         .close_event = efi_close_event,
 896         .check_event = efi_check_event,
 897         .install_protocol_interface = efi_install_protocol_interface,
 898         .reinstall_protocol_interface = efi_reinstall_protocol_interface,
 899         .uninstall_protocol_interface = efi_uninstall_protocol_interface,
 900         .handle_protocol = efi_handle_protocol,
 901         .reserved = NULL,
 902         .register_protocol_notify = efi_register_protocol_notify,
 903         .locate_handle = efi_locate_handle,
 904         .locate_device_path = efi_locate_device_path,
 905         .install_configuration_table = efi_install_configuration_table_ext,
 906         .load_image = efi_load_image,
 907         .start_image = efi_start_image,
 908         .exit = efi_exit,
 909         .unload_image = efi_unload_image,
 910         .exit_boot_services = efi_exit_boot_services,
 911         .get_next_monotonic_count = efi_get_next_monotonic_count,
 912         .stall = efi_stall,
 913         .set_watchdog_timer = efi_set_watchdog_timer,
 914         .connect_controller = efi_connect_controller,
 915         .disconnect_controller = efi_disconnect_controller,
 916         .open_protocol = efi_open_protocol,
 917         .close_protocol = efi_close_protocol,
 918         .open_protocol_information = efi_open_protocol_information,
 919         .protocols_per_handle = efi_protocols_per_handle,
 920         .locate_handle_buffer = efi_locate_handle_buffer,
 921         .locate_protocol = efi_locate_protocol,
 922         .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
 923         .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
 924         .calculate_crc32 = efi_calculate_crc32,
 925         .copy_mem = efi_copy_mem,
 926         .set_mem = efi_set_mem,
 927 };
 928
 929
 930 static uint16_t __efi_runtime_data firmware_vendor[] =
 931         { 'D','a','s',' ','U','-','b','o','o','t',0 };
 932
 933 struct efi_system_table __efi_runtime_data systab = {
 934         .hdr = {
 935                 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
 936                 .revision = 0x20005, /* 2.5 */
 937                 .headersize = sizeof(struct efi_table_hdr),
 938         },
 939         .fw_vendor = (long)firmware_vendor,
 940         .con_in = (void*)&efi_con_in,
 941         .con_out = (void*)&efi_con_out,
 942         .std_err = (void*)&efi_con_out,
 943         .runtime = (void*)&efi_runtime_services,
 944         .boottime = (void*)&efi_boot_services,
 945         .nr_tables = 0,
 946         .tables = (void*)efi_conf_table,
 947 };