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[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         if (!handle || !protocol ||
 311             protocol_interface_type != EFI_NATIVE_INTERFACE) {
 312                 r = EFI_INVALID_PARAMETER;
 313                 goto out;
 314         }
 315
 316         /* Create new handle if requested. */
 317         if (!*handle) {
 318                 r = EFI_OUT_OF_RESOURCES;
 319                 goto out;
 320         }
 321         /* Find object. */
 322         list_for_each(lhandle, &efi_obj_list) {
 323                 struct efi_object *efiobj;
 324                 efiobj = list_entry(lhandle, struct efi_object, link);
 325
 326                 if (efiobj->handle != *handle)
 327                         continue;
 328                 /* Check if protocol is already installed on the handle. */
 329                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 330                         struct efi_handler *handler = &efiobj->protocols[i];
 331
 332                         if (!handler->guid)
 333                                 continue;
 334                         if (!guidcmp(handler->guid, protocol)) {
 335                                 r = EFI_INVALID_PARAMETER;
 336                                 goto out;
 337                         }
 338                 }
 339                 /* Install protocol in first empty slot. */
 340                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 341                         struct efi_handler *handler = &efiobj->protocols[i];
 342
 343                         if (handler->guid)
 344                                 continue;
 345
 346                         handler->guid = protocol;
 347                         handler->protocol_interface = protocol_interface;
 348                         r = EFI_SUCCESS;
 349                         goto out;
 350                 }
 351                 r = EFI_OUT_OF_RESOURCES;
 352                 goto out;
 353         }
 354         r = EFI_INVALID_PARAMETER;
 355 out:
 356         return r;
 357 }
 358
 359 static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
 360                         efi_guid_t *protocol, int protocol_interface_type,
 361                         void *protocol_interface)
 362 {
 363         EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
 364                   protocol_interface);
 365
 366         return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
 367                                                        protocol_interface_type,
 368                                                        protocol_interface));
 369 }
 370
 371 static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
 372                         efi_guid_t *protocol, void *old_interface,
 373                         void *new_interface)
 374 {
 375         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
 376                   new_interface);
 377         return EFI_EXIT(EFI_ACCESS_DENIED);
 378 }
 379
 380 static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
 381                         efi_guid_t *protocol, void *protocol_interface)
 382 {
 383         struct list_head *lhandle;
 384         int i;
 385         efi_status_t r = EFI_NOT_FOUND;
 386
 387         if (!handle || !protocol) {
 388                 r = EFI_INVALID_PARAMETER;
 389                 goto out;
 390         }
 391
 392         list_for_each(lhandle, &efi_obj_list) {
 393                 struct efi_object *efiobj;
 394                 efiobj = list_entry(lhandle, struct efi_object, link);
 395
 396                 if (efiobj->handle != handle)
 397                         continue;
 398
 399                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 400                         struct efi_handler *handler = &efiobj->protocols[i];
 401                         const efi_guid_t *hprotocol = handler->guid;
 402
 403                         if (!hprotocol)
 404                                 continue;
 405                         if (!guidcmp(hprotocol, protocol)) {
 406                                 if (handler->protocol_interface) {
 407                                         r = EFI_ACCESS_DENIED;
 408                                 } else {
 409                                         handler->guid = 0;
 410                                         r = EFI_SUCCESS;
 411                                 }
 412                                 goto out;
 413                         }
 414                 }
 415         }
 416
 417 out:
 418         return r;
 419 }
 420
 421 static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
 422                         efi_guid_t *protocol, void *protocol_interface)
 423 {
 424         EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
 425
 426         return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
 427                                                          protocol_interface));
 428 }
 429
 430 static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
 431                                                         void *event,
 432                                                         void **registration)
 433 {
 434         EFI_ENTRY("%p, %p, %p", protocol, event, registration);
 435         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 436 }
 437
 438 static int efi_search(enum efi_locate_search_type search_type,
 439                       efi_guid_t *protocol, void *search_key,
 440                       struct efi_object *efiobj)
 441 {
 442         int i;
 443
 444         switch (search_type) {
 445         case all_handles:
 446                 return 0;
 447         case by_register_notify:
 448                 return -1;
 449         case by_protocol:
 450                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 451                         const efi_guid_t *guid = efiobj->protocols[i].guid;
 452                         if (guid && !guidcmp(guid, protocol))
 453                                 return 0;
 454                 }
 455                 return -1;
 456         }
 457
 458         return -1;
 459 }
 460
 461 static efi_status_t EFIAPI efi_locate_handle(
 462                         enum efi_locate_search_type search_type,
 463                         efi_guid_t *protocol, void *search_key,
 464                         unsigned long *buffer_size, efi_handle_t *buffer)
 465 {
 466         struct list_head *lhandle;
 467         unsigned long size = 0;
 468
 469         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 470                   buffer_size, buffer);
 471
 472         /* Count how much space we need */
 473         list_for_each(lhandle, &efi_obj_list) {
 474                 struct efi_object *efiobj;
 475                 efiobj = list_entry(lhandle, struct efi_object, link);
 476                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 477                         size += sizeof(void*);
 478                 }
 479         }
 480
 481         if (*buffer_size < size) {
 482                 *buffer_size = size;
 483                 return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
 484         }
 485
 486         /* Then fill the array */
 487         list_for_each(lhandle, &efi_obj_list) {
 488                 struct efi_object *efiobj;
 489                 efiobj = list_entry(lhandle, struct efi_object, link);
 490                 if (!efi_search(search_type, protocol, search_key, efiobj)) {
 491                         *(buffer++) = efiobj->handle;
 492                 }
 493         }
 494
 495         *buffer_size = size;
 496         return EFI_EXIT(EFI_SUCCESS);
 497 }
 498
 499 static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
 500                         struct efi_device_path **device_path,
 501                         efi_handle_t *device)
 502 {
 503         EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
 504         return EFI_EXIT(EFI_NOT_FOUND);
 505 }
 506
 507 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
 508 {
 509         int i;
 510
 511         /* Check for guid override */
 512         for (i = 0; i < systab.nr_tables; i++) {
 513                 if (!guidcmp(guid, &efi_conf_table[i].guid)) {
 514                         efi_conf_table[i].table = table;
 515                         return EFI_SUCCESS;
 516                 }
 517         }
 518
 519         /* No override, check for overflow */
 520         if (i >= ARRAY_SIZE(efi_conf_table))
 521                 return EFI_OUT_OF_RESOURCES;
 522
 523         /* Add a new entry */
 524         memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
 525         efi_conf_table[i].table = table;
 526         systab.nr_tables = i + 1;
 527
 528         return EFI_SUCCESS;
 529 }
 530
 531 static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
 532                                                                void *table)
 533 {
 534         EFI_ENTRY("%p, %p", guid, table);
 535         return EFI_EXIT(efi_install_configuration_table(guid, table));
 536 }
 537
 538 static efi_status_t EFIAPI efi_load_image(bool boot_policy,
 539                                           efi_handle_t parent_image,
 540                                           struct efi_device_path *file_path,
 541                                           void *source_buffer,
 542                                           unsigned long source_size,
 543                                           efi_handle_t *image_handle)
 544 {
 545         static struct efi_object loaded_image_info_obj = {
 546                 .protocols = {
 547                         {
 548                                 .guid = &efi_guid_loaded_image,
 549                         },
 550                 },
 551         };
 552         struct efi_loaded_image *info;
 553         struct efi_object *obj;
 554
 555         EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
 556                   file_path, source_buffer, source_size, image_handle);
 557         info = malloc(sizeof(*info));
 558         loaded_image_info_obj.protocols[0].protocol_interface = info;
 559         obj = malloc(sizeof(loaded_image_info_obj));
 560         memset(info, 0, sizeof(*info));
 561         memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
 562         obj->handle = info;
 563         info->file_path = file_path;
 564         info->reserved = efi_load_pe(source_buffer, info);
 565         if (!info->reserved) {
 566                 free(info);
 567                 free(obj);
 568                 return EFI_EXIT(EFI_UNSUPPORTED);
 569         }
 570
 571         *image_handle = info;
 572         list_add_tail(&obj->link, &efi_obj_list);
 573
 574         return EFI_EXIT(EFI_SUCCESS);
 575 }
 576
 577 static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
 578                                            unsigned long *exit_data_size,
 579                                            s16 **exit_data)
 580 {
 581         ulong (*entry)(void *image_handle, struct efi_system_table *st);
 582         struct efi_loaded_image *info = image_handle;
 583
 584         EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
 585         entry = info->reserved;
 586
 587         efi_is_direct_boot = false;
 588
 589         /* call the image! */
 590         if (setjmp(&info->exit_jmp)) {
 591                 /* We returned from the child image */
 592                 return EFI_EXIT(info->exit_status);
 593         }
 594
 595         entry(image_handle, &systab);
 596
 597         /* Should usually never get here */
 598         return EFI_EXIT(EFI_SUCCESS);
 599 }
 600
 601 static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
 602                         efi_status_t exit_status, unsigned long exit_data_size,
 603                         int16_t *exit_data)
 604 {
 605         struct efi_loaded_image *loaded_image_info = (void*)image_handle;
 606
 607         EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
 608                   exit_data_size, exit_data);
 609
 610         loaded_image_info->exit_status = exit_status;
 611         longjmp(&loaded_image_info->exit_jmp, 1);
 612
 613         panic("EFI application exited");
 614 }
 615
 616 static struct efi_object *efi_search_obj(void *handle)
 617 {
 618         struct list_head *lhandle;
 619
 620         list_for_each(lhandle, &efi_obj_list) {
 621                 struct efi_object *efiobj;
 622                 efiobj = list_entry(lhandle, struct efi_object, link);
 623                 if (efiobj->handle == handle)
 624                         return efiobj;
 625         }
 626
 627         return NULL;
 628 }
 629
 630 static efi_status_t EFIAPI efi_unload_image(void *image_handle)
 631 {
 632         struct efi_object *efiobj;
 633
 634         EFI_ENTRY("%p", image_handle);
 635         efiobj = efi_search_obj(image_handle);
 636         if (efiobj)
 637                 list_del(&efiobj->link);
 638
 639         return EFI_EXIT(EFI_SUCCESS);
 640 }
 641
 642 static void efi_exit_caches(void)
 643 {
 644 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
 645         /*
 646          * Grub on 32bit ARM needs to have caches disabled before jumping into
 647          * a zImage, but does not know of all cache layers. Give it a hand.
 648          */
 649         if (efi_is_direct_boot)
 650                 cleanup_before_linux();
 651 #endif
 652 }
 653
 654 static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
 655                                                   unsigned long map_key)
 656 {
 657         EFI_ENTRY("%p, %ld", image_handle, map_key);
 658
 659         board_quiesce_devices();
 660
 661         /* Fix up caches for EFI payloads if necessary */
 662         efi_exit_caches();
 663
 664         /* This stops all lingering devices */
 665         bootm_disable_interrupts();
 666
 667         /* Give the payload some time to boot */
 668         WATCHDOG_RESET();
 669
 670         return EFI_EXIT(EFI_SUCCESS);
 671 }
 672
 673 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
 674 {
 675         static uint64_t mono = 0;
 676         EFI_ENTRY("%p", count);
 677         *count = mono++;
 678         return EFI_EXIT(EFI_SUCCESS);
 679 }
 680
 681 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
 682 {
 683         EFI_ENTRY("%ld", microseconds);
 684         udelay(microseconds);
 685         return EFI_EXIT(EFI_SUCCESS);
 686 }
 687
 688 static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout,
 689                                                   uint64_t watchdog_code,
 690                                                   unsigned long data_size,
 691                                                   uint16_t *watchdog_data)
 692 {
 693         EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
 694                   data_size, watchdog_data);
 695         return EFI_EXIT(efi_unsupported(__func__));
 696 }
 697
 698 static efi_status_t EFIAPI efi_connect_controller(
 699                         efi_handle_t controller_handle,
 700                         efi_handle_t *driver_image_handle,
 701                         struct efi_device_path *remain_device_path,
 702                         bool recursive)
 703 {
 704         EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
 705                   remain_device_path, recursive);
 706         return EFI_EXIT(EFI_NOT_FOUND);
 707 }
 708
 709 static efi_status_t EFIAPI efi_disconnect_controller(void *controller_handle,
 710                                                      void *driver_image_handle,
 711                                                      void *child_handle)
 712 {
 713         EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
 714                   child_handle);
 715         return EFI_EXIT(EFI_INVALID_PARAMETER);
 716 }
 717
 718 static efi_status_t EFIAPI efi_close_protocol(void *handle,
 719                                               efi_guid_t *protocol,
 720                                               void *agent_handle,
 721                                               void *controller_handle)
 722 {
 723         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
 724                   controller_handle);
 725         return EFI_EXIT(EFI_NOT_FOUND);
 726 }
 727
 728 static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
 729                         efi_guid_t *protocol,
 730                         struct efi_open_protocol_info_entry **entry_buffer,
 731                         unsigned long *entry_count)
 732 {
 733         EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
 734                   entry_count);
 735         return EFI_EXIT(EFI_NOT_FOUND);
 736 }
 737
 738 static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
 739                         efi_guid_t ***protocol_buffer,
 740                         unsigned long *protocol_buffer_count)
 741 {
 742         EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
 743                   protocol_buffer_count);
 744         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 745 }
 746
 747 static efi_status_t EFIAPI efi_locate_handle_buffer(
 748                         enum efi_locate_search_type search_type,
 749                         efi_guid_t *protocol, void *search_key,
 750                         unsigned long *no_handles, efi_handle_t **buffer)
 751 {
 752         EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
 753                   no_handles, buffer);
 754         return EFI_EXIT(EFI_NOT_FOUND);
 755 }
 756
 757 static struct efi_class_map efi_class_maps[] = {
 758         {
 759                 .guid = &efi_guid_console_control,
 760                 .interface = &efi_console_control
 761         },
 762 };
 763
 764 static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
 765                                                void *registration,
 766                                                void **protocol_interface)
 767 {
 768         int i;
 769
 770         EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
 771         for (i = 0; i < ARRAY_SIZE(efi_class_maps); i++) {
 772                 struct efi_class_map *curmap = &efi_class_maps[i];
 773                 if (!guidcmp(protocol, curmap->guid)) {
 774                         *protocol_interface = (void*)curmap->interface;
 775                         return EFI_EXIT(EFI_SUCCESS);
 776                 }
 777         }
 778
 779         return EFI_EXIT(EFI_NOT_FOUND);
 780 }
 781
 782 static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
 783                         void **handle, ...)
 784 {
 785         EFI_ENTRY("%p", handle);
 786         return EFI_EXIT(EFI_OUT_OF_RESOURCES);
 787 }
 788
 789 static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
 790                         void *handle, ...)
 791 {
 792         EFI_ENTRY("%p", handle);
 793         return EFI_EXIT(EFI_INVALID_PARAMETER);
 794 }
 795
 796 static efi_status_t EFIAPI efi_calculate_crc32(void *data,
 797                                                unsigned long data_size,
 798                                                uint32_t *crc32_p)
 799 {
 800         EFI_ENTRY("%p, %ld", data, data_size);
 801         *crc32_p = crc32(0, data, data_size);
 802         return EFI_EXIT(EFI_SUCCESS);
 803 }
 804
 805 static void EFIAPI efi_copy_mem(void *destination, void *source,
 806                                 unsigned long length)
 807 {
 808         EFI_ENTRY("%p, %p, %ld", destination, source, length);
 809         memcpy(destination, source, length);
 810 }
 811
 812 static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
 813 {
 814         EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
 815         memset(buffer, value, size);
 816 }
 817
 818 static efi_status_t EFIAPI efi_open_protocol(
 819                         void *handle, efi_guid_t *protocol,
 820                         void **protocol_interface, void *agent_handle,
 821                         void *controller_handle, uint32_t attributes)
 822 {
 823         struct list_head *lhandle;
 824         int i;
 825         efi_status_t r = EFI_INVALID_PARAMETER;
 826
 827         EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
 828                   protocol_interface, agent_handle, controller_handle,
 829                   attributes);
 830
 831         if (!handle || !protocol ||
 832             (!protocol_interface && attributes !=
 833              EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
 834                 goto out;
 835         }
 836
 837         switch (attributes) {
 838         case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
 839         case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
 840         case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
 841                 break;
 842         case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
 843                 if (controller_handle == handle)
 844                         goto out;
 845         case EFI_OPEN_PROTOCOL_BY_DRIVER:
 846         case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
 847                 if (controller_handle == NULL)
 848                         goto out;
 849         case EFI_OPEN_PROTOCOL_EXCLUSIVE:
 850                 if (agent_handle == NULL)
 851                         goto out;
 852                 break;
 853         default:
 854                 goto out;
 855         }
 856
 857         list_for_each(lhandle, &efi_obj_list) {
 858                 struct efi_object *efiobj;
 859                 efiobj = list_entry(lhandle, struct efi_object, link);
 860
 861                 if (efiobj->handle != handle)
 862                         continue;
 863
 864                 for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
 865                         struct efi_handler *handler = &efiobj->protocols[i];
 866                         const efi_guid_t *hprotocol = handler->guid;
 867                         if (!hprotocol)
 868                                 continue;
 869                         if (!guidcmp(hprotocol, protocol)) {
 870                                 if (attributes !=
 871                                     EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
 872                                         *protocol_interface =
 873                                                 handler->protocol_interface;
 874                                 }
 875                                 r = EFI_SUCCESS;
 876                                 goto out;
 877                         }
 878                 }
 879                 goto unsupported;
 880         }
 881
 882 unsupported:
 883         r = EFI_UNSUPPORTED;
 884 out:
 885         return EFI_EXIT(r);
 886 }
 887
 888 static efi_status_t EFIAPI efi_handle_protocol(void *handle,
 889                                                efi_guid_t *protocol,
 890                                                void **protocol_interface)
 891 {
 892         return efi_open_protocol(handle, protocol, protocol_interface, NULL,
 893                                  NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
 894 }
 895
 896 static const struct efi_boot_services efi_boot_services = {
 897         .hdr = {
 898                 .headersize = sizeof(struct efi_table_hdr),
 899         },
 900         .raise_tpl = efi_raise_tpl,
 901         .restore_tpl = efi_restore_tpl,
 902         .allocate_pages = efi_allocate_pages_ext,
 903         .free_pages = efi_free_pages_ext,
 904         .get_memory_map = efi_get_memory_map_ext,
 905         .allocate_pool = efi_allocate_pool_ext,
 906         .free_pool = efi_free_pool_ext,
 907         .create_event = efi_create_event,
 908         .set_timer = efi_set_timer,
 909         .wait_for_event = efi_wait_for_event,
 910         .signal_event = efi_signal_event,
 911         .close_event = efi_close_event,
 912         .check_event = efi_check_event,
 913         .install_protocol_interface = efi_install_protocol_interface_ext,
 914         .reinstall_protocol_interface = efi_reinstall_protocol_interface,
 915         .uninstall_protocol_interface = efi_uninstall_protocol_interface_ext,
 916         .handle_protocol = efi_handle_protocol,
 917         .reserved = NULL,
 918         .register_protocol_notify = efi_register_protocol_notify,
 919         .locate_handle = efi_locate_handle,
 920         .locate_device_path = efi_locate_device_path,
 921         .install_configuration_table = efi_install_configuration_table_ext,
 922         .load_image = efi_load_image,
 923         .start_image = efi_start_image,
 924         .exit = efi_exit,
 925         .unload_image = efi_unload_image,
 926         .exit_boot_services = efi_exit_boot_services,
 927         .get_next_monotonic_count = efi_get_next_monotonic_count,
 928         .stall = efi_stall,
 929         .set_watchdog_timer = efi_set_watchdog_timer,
 930         .connect_controller = efi_connect_controller,
 931         .disconnect_controller = efi_disconnect_controller,
 932         .open_protocol = efi_open_protocol,
 933         .close_protocol = efi_close_protocol,
 934         .open_protocol_information = efi_open_protocol_information,
 935         .protocols_per_handle = efi_protocols_per_handle,
 936         .locate_handle_buffer = efi_locate_handle_buffer,
 937         .locate_protocol = efi_locate_protocol,
 938         .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
 939         .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
 940         .calculate_crc32 = efi_calculate_crc32,
 941         .copy_mem = efi_copy_mem,
 942         .set_mem = efi_set_mem,
 943 };
 944
 945
 946 static uint16_t __efi_runtime_data firmware_vendor[] =
 947         { 'D','a','s',' ','U','-','b','o','o','t',0 };
 948
 949 struct efi_system_table __efi_runtime_data systab = {
 950         .hdr = {
 951                 .signature = EFI_SYSTEM_TABLE_SIGNATURE,
 952                 .revision = 0x20005, /* 2.5 */
 953                 .headersize = sizeof(struct efi_table_hdr),
 954         },
 955         .fw_vendor = (long)firmware_vendor,
 956         .con_in = (void*)&efi_con_in,
 957         .con_out = (void*)&efi_con_out,
 958         .std_err = (void*)&efi_con_out,
 959         .runtime = (void*)&efi_runtime_services,
 960         .boottime = (void*)&efi_boot_services,
 961         .nr_tables = 0,
 962         .tables = (void*)efi_conf_table,
 963 };