cmd/efidebug.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  UEFI Shell-like command
   4  *
   5  *  Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
   6  */
   7
   8 #include <charset.h>
   9 #include <common.h>
  10 #include <command.h>
  11 #include <efi_loader.h>
  12 #include <exports.h>
  13 #include <hexdump.h>
  14 #include <malloc.h>
  15 #include <search.h>
  16 #include <linux/ctype.h>
  17
  18 #define BS systab.boottime
  19 #define RT systab.runtime
  20
  21 /**
  22  * efi_get_device_handle_info() - get information of UEFI device
  23  *
  24  * @handle:             Handle of UEFI device
  25  * @dev_path_text:      Pointer to text of device path
  26  * Return:              0 on success, -1 on failure
  27  *
  28  * Currently return a formatted text of device path.
  29  */
  30 static int efi_get_device_handle_info(efi_handle_t handle, u16 **dev_path_text)
  31 {
  32         struct efi_device_path *dp;
  33         efi_status_t ret;
  34
  35         ret = EFI_CALL(BS->open_protocol(handle, &efi_guid_device_path,
  36                                          (void **)&dp, NULL /* FIXME */, NULL,
  37                                          EFI_OPEN_PROTOCOL_GET_PROTOCOL));
  38         if (ret == EFI_SUCCESS) {
  39                 *dev_path_text = efi_dp_str(dp);
  40                 return 0;
  41         } else {
  42                 return -1;
  43         }
  44 }
  45
  46 #define EFI_HANDLE_WIDTH ((int)sizeof(efi_handle_t) * 2)
  47
  48 static const char spc[] = "                ";
  49 static const char sep[] = "================";
  50
  51 /**
  52  * do_efi_show_devices() - show UEFI devices
  53  *
  54  * @cmdtp:      Command table
  55  * @flag:       Command flag
  56  * @argc:       Number of arguments
  57  * @argv:       Argument array
  58  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
  59  *
  60  * Implement efidebug "devices" sub-command.
  61  * Show all UEFI devices and their information.
  62  */
  63 static int do_efi_show_devices(cmd_tbl_t *cmdtp, int flag,
  64                                int argc, char * const argv[])
  65 {
  66         efi_handle_t *handles;
  67         efi_uintn_t num, i;
  68         u16 *dev_path_text;
  69         efi_status_t ret;
  70
  71         ret = EFI_CALL(BS->locate_handle_buffer(ALL_HANDLES, NULL, NULL,
  72                                                 &num, &handles));
  73         if (ret != EFI_SUCCESS)
  74                 return CMD_RET_FAILURE;
  75
  76         if (!num)
  77                 return CMD_RET_SUCCESS;
  78
  79         printf("Device%.*s Device Path\n", EFI_HANDLE_WIDTH - 6, spc);
  80         printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
  81         for (i = 0; i < num; i++) {
  82                 if (!efi_get_device_handle_info(handles[i], &dev_path_text)) {
  83                         printf("%p %ls\n", handles[i], dev_path_text);
  84                         efi_free_pool(dev_path_text);
  85                 }
  86         }
  87
  88         EFI_CALL(BS->free_pool(handles));
  89
  90         return CMD_RET_SUCCESS;
  91 }
  92
  93 /**
  94  * efi_get_driver_handle_info() - get information of UEFI driver
  95  *
  96  * @handle:             Handle of UEFI device
  97  * @driver_name:        Driver name
  98  * @image_path:         Pointer to text of device path
  99  * Return:              0 on success, -1 on failure
 100  *
 101  * Currently return no useful information as all UEFI drivers are
 102  * built-in..
 103  */
 104 static int efi_get_driver_handle_info(efi_handle_t handle, u16 **driver_name,
 105                                       u16 **image_path)
 106 {
 107         struct efi_handler *handler;
 108         struct efi_loaded_image *image;
 109         efi_status_t ret;
 110
 111         /*
 112          * driver name
 113          * TODO: support EFI_COMPONENT_NAME2_PROTOCOL
 114          */
 115         *driver_name = NULL;
 116
 117         /* image name */
 118         ret = efi_search_protocol(handle, &efi_guid_loaded_image, &handler);
 119         if (ret != EFI_SUCCESS) {
 120                 *image_path = NULL;
 121                 return 0;
 122         }
 123
 124         image = handler->protocol_interface;
 125         *image_path = efi_dp_str(image->file_path);
 126
 127         return 0;
 128 }
 129
 130 /**
 131  * do_efi_show_drivers() - show UEFI drivers
 132  *
 133  * @cmdtp:      Command table
 134  * @flag:       Command flag
 135  * @argc:       Number of arguments
 136  * @argv:       Argument array
 137  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 138  *
 139  * Implement efidebug "drivers" sub-command.
 140  * Show all UEFI drivers and their information.
 141  */
 142 static int do_efi_show_drivers(cmd_tbl_t *cmdtp, int flag,
 143                                int argc, char * const argv[])
 144 {
 145         efi_handle_t *handles;
 146         efi_uintn_t num, i;
 147         u16 *driver_name, *image_path_text;
 148         efi_status_t ret;
 149
 150         ret = EFI_CALL(BS->locate_handle_buffer(
 151                                 BY_PROTOCOL, &efi_guid_driver_binding_protocol,
 152                                 NULL, &num, &handles));
 153         if (ret != EFI_SUCCESS)
 154                 return CMD_RET_FAILURE;
 155
 156         if (!num)
 157                 return CMD_RET_SUCCESS;
 158
 159         printf("Driver%.*s Name                 Image Path\n",
 160                EFI_HANDLE_WIDTH - 6, spc);
 161         printf("%.*s ==================== ====================\n",
 162                EFI_HANDLE_WIDTH, sep);
 163         for (i = 0; i < num; i++) {
 164                 if (!efi_get_driver_handle_info(handles[i], &driver_name,
 165                                                 &image_path_text)) {
 166                         if (image_path_text)
 167                                 printf("%p %-20ls %ls\n", handles[i],
 168                                        driver_name, image_path_text);
 169                         else
 170                                 printf("%p %-20ls <built-in>\n",
 171                                        handles[i], driver_name);
 172                         EFI_CALL(BS->free_pool(driver_name));
 173                         EFI_CALL(BS->free_pool(image_path_text));
 174                 }
 175         }
 176
 177         EFI_CALL(BS->free_pool(handles));
 178
 179         return CMD_RET_SUCCESS;
 180 }
 181
 182 static const struct {
 183         const char *text;
 184         const efi_guid_t guid;
 185 } guid_list[] = {
 186         {
 187                 "Device Path",
 188                 EFI_DEVICE_PATH_PROTOCOL_GUID,
 189         },
 190         {
 191                 "Device Path To Text",
 192                 EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID,
 193         },
 194         {
 195                 "Device Path Utilities",
 196                 EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID,
 197         },
 198         {
 199                 "Unicode Collation 2",
 200                 EFI_UNICODE_COLLATION_PROTOCOL2_GUID,
 201         },
 202         {
 203                 "Driver Binding",
 204                 EFI_DRIVER_BINDING_PROTOCOL_GUID,
 205         },
 206         {
 207                 "Simple Text Input",
 208                 EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID,
 209         },
 210         {
 211                 "Simple Text Input Ex",
 212                 EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID,
 213         },
 214         {
 215                 "Simple Text Output",
 216                 EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID,
 217         },
 218         {
 219                 "Block IO",
 220                 EFI_BLOCK_IO_PROTOCOL_GUID,
 221         },
 222         {
 223                 "Simple File System",
 224                 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID,
 225         },
 226         {
 227                 "Loaded Image",
 228                 EFI_LOADED_IMAGE_PROTOCOL_GUID,
 229         },
 230         {
 231                 "Graphics Output",
 232                 EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID,
 233         },
 234         {
 235                 "HII String",
 236                 EFI_HII_STRING_PROTOCOL_GUID,
 237         },
 238         {
 239                 "HII Database",
 240                 EFI_HII_DATABASE_PROTOCOL_GUID,
 241         },
 242         {
 243                 "HII Config Routing",
 244                 EFI_HII_CONFIG_ROUTING_PROTOCOL_GUID,
 245         },
 246         {
 247                 "Load File2",
 248                 EFI_LOAD_FILE2_PROTOCOL_GUID,
 249         },
 250         {
 251                 "Simple Network",
 252                 EFI_SIMPLE_NETWORK_PROTOCOL_GUID,
 253         },
 254         {
 255                 "PXE Base Code",
 256                 EFI_PXE_BASE_CODE_PROTOCOL_GUID,
 257         },
 258         /* Configuration table GUIDs */
 259         {
 260                 "ACPI table",
 261                 EFI_ACPI_TABLE_GUID,
 262         },
 263         {
 264                 "device tree",
 265                 EFI_FDT_GUID,
 266         },
 267         {
 268                 "SMBIOS table",
 269                 SMBIOS_TABLE_GUID,
 270         },
 271         {
 272                 "Runtime properties",
 273                 EFI_RT_PROPERTIES_TABLE_GUID,
 274         },
 275 };
 276
 277 /**
 278  * get_guid_text - get string of GUID
 279  *
 280  * Return description of GUID.
 281  *
 282  * @guid:       GUID
 283  * Return:      description of GUID or NULL
 284  */
 285 static const char *get_guid_text(const void *guid)
 286 {
 287         int i;
 288
 289         for (i = 0; i < ARRAY_SIZE(guid_list); i++) {
 290                 /*
 291                  * As guidcmp uses memcmp() we can safely accept unaligned
 292                  * GUIDs.
 293                  */
 294                 if (!guidcmp(&guid_list[i].guid, guid))
 295                         return guid_list[i].text;
 296         }
 297
 298         return NULL;
 299 }
 300
 301 /**
 302  * do_efi_show_handles() - show UEFI handles
 303  *
 304  * @cmdtp:      Command table
 305  * @flag:       Command flag
 306  * @argc:       Number of arguments
 307  * @argv:       Argument array
 308  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 309  *
 310  * Implement efidebug "dh" sub-command.
 311  * Show all UEFI handles and their information, currently all protocols
 312  * added to handle.
 313  */
 314 static int do_efi_show_handles(cmd_tbl_t *cmdtp, int flag,
 315                                int argc, char * const argv[])
 316 {
 317         efi_handle_t *handles;
 318         efi_guid_t **guid;
 319         efi_uintn_t num, count, i, j;
 320         const char *guid_text;
 321         efi_status_t ret;
 322
 323         ret = EFI_CALL(BS->locate_handle_buffer(ALL_HANDLES, NULL, NULL,
 324                                                 &num, &handles));
 325         if (ret != EFI_SUCCESS)
 326                 return CMD_RET_FAILURE;
 327
 328         if (!num)
 329                 return CMD_RET_SUCCESS;
 330
 331         printf("Handle%.*s Protocols\n", EFI_HANDLE_WIDTH - 6, spc);
 332         printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
 333         for (i = 0; i < num; i++) {
 334                 printf("%p", handles[i]);
 335                 ret = EFI_CALL(BS->protocols_per_handle(handles[i], &guid,
 336                                                         &count));
 337                 if (ret || !count) {
 338                         putc('\n');
 339                         continue;
 340                 }
 341
 342                 for (j = 0; j < count; j++) {
 343                         if (j)
 344                                 printf(", ");
 345                         else
 346                                 putc(' ');
 347
 348                         guid_text = get_guid_text(guid[j]);
 349                         if (guid_text)
 350                                 puts(guid_text);
 351                         else
 352                                 printf("%pUl", guid[j]);
 353                 }
 354                 putc('\n');
 355         }
 356
 357         EFI_CALL(BS->free_pool(handles));
 358
 359         return CMD_RET_SUCCESS;
 360 }
 361
 362 /**
 363  * do_efi_show_images() - show UEFI images
 364  *
 365  * @cmdtp:      Command table
 366  * @flag:       Command flag
 367  * @argc:       Number of arguments
 368  * @argv:       Argument array
 369  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 370  *
 371  * Implement efidebug "images" sub-command.
 372  * Show all UEFI loaded images and their information.
 373  */
 374 static int do_efi_show_images(cmd_tbl_t *cmdtp, int flag,
 375                               int argc, char * const argv[])
 376 {
 377         efi_print_image_infos(NULL);
 378
 379         return CMD_RET_SUCCESS;
 380 }
 381
 382 static const char * const efi_mem_type_string[] = {
 383         [EFI_RESERVED_MEMORY_TYPE] = "RESERVED",
 384         [EFI_LOADER_CODE] = "LOADER CODE",
 385         [EFI_LOADER_DATA] = "LOADER DATA",
 386         [EFI_BOOT_SERVICES_CODE] = "BOOT CODE",
 387         [EFI_BOOT_SERVICES_DATA] = "BOOT DATA",
 388         [EFI_RUNTIME_SERVICES_CODE] = "RUNTIME CODE",
 389         [EFI_RUNTIME_SERVICES_DATA] = "RUNTIME DATA",
 390         [EFI_CONVENTIONAL_MEMORY] = "CONVENTIONAL",
 391         [EFI_UNUSABLE_MEMORY] = "UNUSABLE MEM",
 392         [EFI_ACPI_RECLAIM_MEMORY] = "ACPI RECLAIM MEM",
 393         [EFI_ACPI_MEMORY_NVS] = "ACPI NVS",
 394         [EFI_MMAP_IO] = "IO",
 395         [EFI_MMAP_IO_PORT] = "IO PORT",
 396         [EFI_PAL_CODE] = "PAL",
 397 };
 398
 399 static const struct efi_mem_attrs {
 400         const u64 bit;
 401         const char *text;
 402 } efi_mem_attrs[] = {
 403         {EFI_MEMORY_UC, "UC"},
 404         {EFI_MEMORY_UC, "UC"},
 405         {EFI_MEMORY_WC, "WC"},
 406         {EFI_MEMORY_WT, "WT"},
 407         {EFI_MEMORY_WB, "WB"},
 408         {EFI_MEMORY_UCE, "UCE"},
 409         {EFI_MEMORY_WP, "WP"},
 410         {EFI_MEMORY_RP, "RP"},
 411         {EFI_MEMORY_XP, "WP"},
 412         {EFI_MEMORY_NV, "NV"},
 413         {EFI_MEMORY_MORE_RELIABLE, "REL"},
 414         {EFI_MEMORY_RO, "RO"},
 415         {EFI_MEMORY_RUNTIME, "RT"},
 416 };
 417
 418 /**
 419  * print_memory_attributes() - print memory map attributes
 420  *
 421  * @attributes: Attribute value
 422  *
 423  * Print memory map attributes
 424  */
 425 static void print_memory_attributes(u64 attributes)
 426 {
 427         int sep, i;
 428
 429         for (sep = 0, i = 0; i < ARRAY_SIZE(efi_mem_attrs); i++)
 430                 if (attributes & efi_mem_attrs[i].bit) {
 431                         if (sep) {
 432                                 putc('|');
 433                         } else {
 434                                 putc(' ');
 435                                 sep = 1;
 436                         }
 437                         puts(efi_mem_attrs[i].text);
 438                 }
 439 }
 440
 441 #define EFI_PHYS_ADDR_WIDTH (int)(sizeof(efi_physical_addr_t) * 2)
 442
 443 /**
 444  * do_efi_show_memmap() - show UEFI memory map
 445  *
 446  * @cmdtp:      Command table
 447  * @flag:       Command flag
 448  * @argc:       Number of arguments
 449  * @argv:       Argument array
 450  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 451  *
 452  * Implement efidebug "memmap" sub-command.
 453  * Show UEFI memory map.
 454  */
 455 static int do_efi_show_memmap(cmd_tbl_t *cmdtp, int flag,
 456                               int argc, char * const argv[])
 457 {
 458         struct efi_mem_desc *memmap = NULL, *map;
 459         efi_uintn_t map_size = 0;
 460         const char *type;
 461         int i;
 462         efi_status_t ret;
 463
 464         ret = EFI_CALL(BS->get_memory_map(&map_size, memmap, NULL, NULL, NULL));
 465         if (ret == EFI_BUFFER_TOO_SMALL) {
 466                 map_size += sizeof(struct efi_mem_desc); /* for my own */
 467                 ret = EFI_CALL(BS->allocate_pool(EFI_LOADER_DATA,
 468                                                  map_size, (void *)&memmap));
 469                 if (ret != EFI_SUCCESS)
 470                         return CMD_RET_FAILURE;
 471                 ret = EFI_CALL(BS->get_memory_map(&map_size, memmap,
 472                                                   NULL, NULL, NULL));
 473         }
 474         if (ret != EFI_SUCCESS) {
 475                 EFI_CALL(BS->free_pool(memmap));
 476                 return CMD_RET_FAILURE;
 477         }
 478
 479         printf("Type             Start%.*s End%.*s Attributes\n",
 480                EFI_PHYS_ADDR_WIDTH - 5, spc, EFI_PHYS_ADDR_WIDTH - 3, spc);
 481         printf("================ %.*s %.*s ==========\n",
 482                EFI_PHYS_ADDR_WIDTH, sep, EFI_PHYS_ADDR_WIDTH, sep);
 483         for (i = 0, map = memmap; i < map_size / sizeof(*map); map++, i++) {
 484                 if (map->type < EFI_MAX_MEMORY_TYPE)
 485                         type = efi_mem_type_string[map->type];
 486                 else
 487                         type = "(unknown)";
 488
 489                 printf("%-16s %.*llx-%.*llx", type,
 490                        EFI_PHYS_ADDR_WIDTH,
 491                        map->physical_start,
 492                        EFI_PHYS_ADDR_WIDTH,
 493                        map->physical_start + map->num_pages * EFI_PAGE_SIZE);
 494
 495                 print_memory_attributes(map->attribute);
 496                 putc('\n');
 497         }
 498
 499         EFI_CALL(BS->free_pool(memmap));
 500
 501         return CMD_RET_SUCCESS;
 502 }
 503
 504 /**
 505  * do_efi_show_tables() - show UEFI configuration tables
 506  *
 507  * @cmdtp:      Command table
 508  * @flag:       Command flag
 509  * @argc:       Number of arguments
 510  * @argv:       Argument array
 511  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 512  *
 513  * Implement efidebug "tables" sub-command.
 514  * Show UEFI configuration tables.
 515  */
 516 static int do_efi_show_tables(cmd_tbl_t *cmdtp, int flag,
 517                               int argc, char * const argv[])
 518 {
 519         efi_uintn_t i;
 520         const char *guid_str;
 521
 522         for (i = 0; i < systab.nr_tables; ++i) {
 523                 guid_str = get_guid_text(&systab.tables[i].guid);
 524                 if (!guid_str)
 525                         guid_str = "";
 526                 printf("%pUl %s\n", &systab.tables[i].guid, guid_str);
 527         }
 528
 529         return CMD_RET_SUCCESS;
 530 }
 531
 532 /**
 533  * do_efi_boot_add() - set UEFI load option
 534  *
 535  * @cmdtp:      Command table
 536  * @flag:       Command flag
 537  * @argc:       Number of arguments
 538  * @argv:       Argument array
 539  * Return:      CMD_RET_SUCCESS on success,
 540  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
 541  *
 542  * Implement efidebug "boot add" sub-command. Create or change UEFI load option.
 543  *
 544  *     efidebug boot add <id> <label> <interface> <devnum>[:<part>] <file> <options>
 545  */
 546 static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
 547                            int argc, char * const argv[])
 548 {
 549         int id;
 550         char *endp;
 551         char var_name[9];
 552         u16 var_name16[9], *p;
 553         efi_guid_t guid;
 554         size_t label_len, label_len16;
 555         u16 *label;
 556         struct efi_device_path *device_path = NULL, *file_path = NULL;
 557         struct efi_load_option lo;
 558         void *data = NULL;
 559         efi_uintn_t size;
 560         efi_status_t ret;
 561         int r = CMD_RET_SUCCESS;
 562
 563         if (argc < 6 || argc > 7)
 564                 return CMD_RET_USAGE;
 565
 566         id = (int)simple_strtoul(argv[1], &endp, 16);
 567         if (*endp != '\0' || id > 0xffff)
 568                 return CMD_RET_USAGE;
 569
 570         sprintf(var_name, "Boot%04X", id);
 571         p = var_name16;
 572         utf8_utf16_strncpy(&p, var_name, 9);
 573
 574         guid = efi_global_variable_guid;
 575
 576         /* attributes */
 577         lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */
 578
 579         /* label */
 580         label_len = strlen(argv[2]);
 581         label_len16 = utf8_utf16_strnlen(argv[2], label_len);
 582         label = malloc((label_len16 + 1) * sizeof(u16));
 583         if (!label)
 584                 return CMD_RET_FAILURE;
 585         lo.label = label; /* label will be changed below */
 586         utf8_utf16_strncpy(&label, argv[2], label_len);
 587
 588         /* file path */
 589         ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path,
 590                                &file_path);
 591         if (ret != EFI_SUCCESS) {
 592                 printf("Cannot create device path for \"%s %s\"\n",
 593                        argv[3], argv[4]);
 594                 r = CMD_RET_FAILURE;
 595                 goto out;
 596         }
 597         lo.file_path = file_path;
 598         lo.file_path_length = efi_dp_size(file_path)
 599                                 + sizeof(struct efi_device_path); /* for END */
 600
 601         /* optional data */
 602         if (argc < 6)
 603                 lo.optional_data = NULL;
 604         else
 605                 lo.optional_data = (const u8 *)argv[6];
 606
 607         size = efi_serialize_load_option(&lo, (u8 **)&data);
 608         if (!size) {
 609                 r = CMD_RET_FAILURE;
 610                 goto out;
 611         }
 612
 613         ret = EFI_CALL(RT->set_variable(var_name16, &guid,
 614                                         EFI_VARIABLE_NON_VOLATILE |
 615                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
 616                                         EFI_VARIABLE_RUNTIME_ACCESS,
 617                                         size, data));
 618         if (ret != EFI_SUCCESS) {
 619                 printf("Cannot set %ls\n", var_name16);
 620                 r = CMD_RET_FAILURE;
 621         }
 622 out:
 623         free(data);
 624         efi_free_pool(device_path);
 625         efi_free_pool(file_path);
 626         free(lo.label);
 627
 628         return r;
 629 }
 630
 631 /**
 632  * do_efi_boot_rm() - delete UEFI load options
 633  *
 634  * @cmdtp:      Command table
 635  * @flag:       Command flag
 636  * @argc:       Number of arguments
 637  * @argv:       Argument array
 638  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 639  *
 640  * Implement efidebug "boot rm" sub-command.
 641  * Delete UEFI load options.
 642  *
 643  *     efidebug boot rm <id> ...
 644  */
 645 static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag,
 646                           int argc, char * const argv[])
 647 {
 648         efi_guid_t guid;
 649         int id, i;
 650         char *endp;
 651         char var_name[9];
 652         u16 var_name16[9], *p;
 653         efi_status_t ret;
 654
 655         if (argc == 1)
 656                 return CMD_RET_USAGE;
 657
 658         guid = efi_global_variable_guid;
 659         for (i = 1; i < argc; i++, argv++) {
 660                 id = (int)simple_strtoul(argv[1], &endp, 16);
 661                 if (*endp != '\0' || id > 0xffff)
 662                         return CMD_RET_FAILURE;
 663
 664                 sprintf(var_name, "Boot%04X", id);
 665                 p = var_name16;
 666                 utf8_utf16_strncpy(&p, var_name, 9);
 667
 668                 ret = EFI_CALL(RT->set_variable(var_name16, &guid, 0, 0, NULL));
 669                 if (ret) {
 670                         printf("Cannot remove Boot%04X", id);
 671                         return CMD_RET_FAILURE;
 672                 }
 673         }
 674
 675         return CMD_RET_SUCCESS;
 676 }
 677
 678 /**
 679  * show_efi_boot_opt_data() - dump UEFI load option
 680  *
 681  * @id:         load option number
 682  * @data:       value of UEFI load option variable
 683  * @size:       size of the boot option
 684  *
 685  * Decode the value of UEFI load option variable and print information.
 686  */
 687 static void show_efi_boot_opt_data(int id, void *data, size_t size)
 688 {
 689         struct efi_load_option lo;
 690         char *label, *p;
 691         size_t label_len16, label_len;
 692         u16 *dp_str;
 693
 694         efi_deserialize_load_option(&lo, data);
 695
 696         label_len16 = u16_strlen(lo.label);
 697         label_len = utf16_utf8_strnlen(lo.label, label_len16);
 698         label = malloc(label_len + 1);
 699         if (!label)
 700                 return;
 701         p = label;
 702         utf16_utf8_strncpy(&p, lo.label, label_len16);
 703
 704         printf("Boot%04X:\n", id);
 705         printf("  attributes: %c%c%c (0x%08x)\n",
 706                /* ACTIVE */
 707                lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-',
 708                /* FORCE RECONNECT */
 709                lo.attributes & LOAD_OPTION_FORCE_RECONNECT ? 'R' : '-',
 710                /* HIDDEN */
 711                lo.attributes & LOAD_OPTION_HIDDEN ? 'H' : '-',
 712                lo.attributes);
 713         printf("  label: %s\n", label);
 714
 715         dp_str = efi_dp_str(lo.file_path);
 716         printf("  file_path: %ls\n", dp_str);
 717         efi_free_pool(dp_str);
 718
 719         printf("  data:\n");
 720         print_hex_dump("    ", DUMP_PREFIX_OFFSET, 16, 1,
 721                        lo.optional_data, size + (u8 *)data -
 722                        (u8 *)lo.optional_data, true);
 723         free(label);
 724 }
 725
 726 /**
 727  * show_efi_boot_opt() - dump UEFI load option
 728  *
 729  * @id:         Load option number
 730  *
 731  * Dump information defined by UEFI load option.
 732  */
 733 static void show_efi_boot_opt(int id)
 734 {
 735         char var_name[9];
 736         u16 var_name16[9], *p;
 737         efi_guid_t guid;
 738         void *data = NULL;
 739         efi_uintn_t size;
 740         efi_status_t ret;
 741
 742         sprintf(var_name, "Boot%04X", id);
 743         p = var_name16;
 744         utf8_utf16_strncpy(&p, var_name, 9);
 745         guid = efi_global_variable_guid;
 746
 747         size = 0;
 748         ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size, NULL));
 749         if (ret == EFI_BUFFER_TOO_SMALL) {
 750                 data = malloc(size);
 751                 ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
 752                                                 data));
 753         }
 754         if (ret == EFI_SUCCESS)
 755                 show_efi_boot_opt_data(id, data, size);
 756         else if (ret == EFI_NOT_FOUND)
 757                 printf("Boot%04X: not found\n", id);
 758
 759         free(data);
 760 }
 761
 762 static int u16_tohex(u16 c)
 763 {
 764         if (c >= '0' && c <= '9')
 765                 return c - '0';
 766         if (c >= 'A' && c <= 'F')
 767                 return c - 'A' + 10;
 768
 769         /* not hexadecimal */
 770         return -1;
 771 }
 772
 773 /**
 774  * show_efi_boot_dump() - dump all UEFI load options
 775  *
 776  * @cmdtp:      Command table
 777  * @flag:       Command flag
 778  * @argc:       Number of arguments
 779  * @argv:       Argument array
 780  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 781  *
 782  * Implement efidebug "boot dump" sub-command.
 783  * Dump information of all UEFI load options defined.
 784  *
 785  *     efidebug boot dump
 786  */
 787 static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
 788                             int argc, char * const argv[])
 789 {
 790         u16 *var_name16, *p;
 791         efi_uintn_t buf_size, size;
 792         efi_guid_t guid;
 793         int id, i, digit;
 794         efi_status_t ret;
 795
 796         if (argc > 1)
 797                 return CMD_RET_USAGE;
 798
 799         buf_size = 128;
 800         var_name16 = malloc(buf_size);
 801         if (!var_name16)
 802                 return CMD_RET_FAILURE;
 803
 804         var_name16[0] = 0;
 805         for (;;) {
 806                 size = buf_size;
 807                 ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
 808                                                           &guid));
 809                 if (ret == EFI_NOT_FOUND)
 810                         break;
 811                 if (ret == EFI_BUFFER_TOO_SMALL) {
 812                         buf_size = size;
 813                         p = realloc(var_name16, buf_size);
 814                         if (!p) {
 815                                 free(var_name16);
 816                                 return CMD_RET_FAILURE;
 817                         }
 818                         var_name16 = p;
 819                         ret = EFI_CALL(efi_get_next_variable_name(&size,
 820                                                                   var_name16,
 821                                                                   &guid));
 822                 }
 823                 if (ret != EFI_SUCCESS) {
 824                         free(var_name16);
 825                         return CMD_RET_FAILURE;
 826                 }
 827
 828                 if (memcmp(var_name16, L"Boot", 8))
 829                         continue;
 830
 831                 for (id = 0, i = 0; i < 4; i++) {
 832                         digit = u16_tohex(var_name16[4 + i]);
 833                         if (digit < 0)
 834                                 break;
 835                         id = (id << 4) + digit;
 836                 }
 837                 if (i == 4 && !var_name16[8])
 838                         show_efi_boot_opt(id);
 839         }
 840
 841         free(var_name16);
 842
 843         return CMD_RET_SUCCESS;
 844 }
 845
 846 /**
 847  * show_efi_boot_order() - show order of UEFI load options
 848  *
 849  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 850  *
 851  * Show order of UEFI load options defined by BootOrder variable.
 852  */
 853 static int show_efi_boot_order(void)
 854 {
 855         efi_guid_t guid;
 856         u16 *bootorder = NULL;
 857         efi_uintn_t size;
 858         int num, i;
 859         char var_name[9];
 860         u16 var_name16[9], *p16;
 861         void *data;
 862         struct efi_load_option lo;
 863         char *label, *p;
 864         size_t label_len16, label_len;
 865         efi_status_t ret;
 866
 867         guid = efi_global_variable_guid;
 868         size = 0;
 869         ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL, &size,
 870                                         NULL));
 871         if (ret == EFI_BUFFER_TOO_SMALL) {
 872                 bootorder = malloc(size);
 873                 ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL,
 874                                                 &size, bootorder));
 875         }
 876         if (ret == EFI_NOT_FOUND) {
 877                 printf("BootOrder not defined\n");
 878                 ret = CMD_RET_SUCCESS;
 879                 goto out;
 880         } else if (ret != EFI_SUCCESS) {
 881                 ret = CMD_RET_FAILURE;
 882                 goto out;
 883         }
 884
 885         num = size / sizeof(u16);
 886         for (i = 0; i < num; i++) {
 887                 sprintf(var_name, "Boot%04X", bootorder[i]);
 888                 p16 = var_name16;
 889                 utf8_utf16_strncpy(&p16, var_name, 9);
 890
 891                 size = 0;
 892                 ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
 893                                                 NULL));
 894                 if (ret != EFI_BUFFER_TOO_SMALL) {
 895                         printf("%2d: Boot%04X: (not defined)\n",
 896                                i + 1, bootorder[i]);
 897                         continue;
 898                 }
 899
 900                 data = malloc(size);
 901                 if (!data) {
 902                         ret = CMD_RET_FAILURE;
 903                         goto out;
 904                 }
 905                 ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
 906                                                 data));
 907                 if (ret != EFI_SUCCESS) {
 908                         free(data);
 909                         ret = CMD_RET_FAILURE;
 910                         goto out;
 911                 }
 912
 913                 efi_deserialize_load_option(&lo, data);
 914
 915                 label_len16 = u16_strlen(lo.label);
 916                 label_len = utf16_utf8_strnlen(lo.label, label_len16);
 917                 label = malloc(label_len + 1);
 918                 if (!label) {
 919                         free(data);
 920                         ret = CMD_RET_FAILURE;
 921                         goto out;
 922                 }
 923                 p = label;
 924                 utf16_utf8_strncpy(&p, lo.label, label_len16);
 925                 printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label);
 926                 free(label);
 927
 928                 free(data);
 929         }
 930 out:
 931         free(bootorder);
 932
 933         return ret;
 934 }
 935
 936 /**
 937  * do_efi_boot_next() - manage UEFI BootNext variable
 938  *
 939  * @cmdtp:      Command table
 940  * @flag:       Command flag
 941  * @argc:       Number of arguments
 942  * @argv:       Argument array
 943  * Return:      CMD_RET_SUCCESS on success,
 944  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
 945  *
 946  * Implement efidebug "boot next" sub-command.
 947  * Set BootNext variable.
 948  *
 949  *     efidebug boot next <id>
 950  */
 951 static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag,
 952                             int argc, char * const argv[])
 953 {
 954         u16 bootnext;
 955         efi_uintn_t size;
 956         char *endp;
 957         efi_guid_t guid;
 958         efi_status_t ret;
 959         int r = CMD_RET_SUCCESS;
 960
 961         if (argc != 2)
 962                 return CMD_RET_USAGE;
 963
 964         bootnext = (u16)simple_strtoul(argv[1], &endp, 16);
 965         if (*endp != '\0' || bootnext > 0xffff) {
 966                 printf("invalid value: %s\n", argv[1]);
 967                 r = CMD_RET_FAILURE;
 968                 goto out;
 969         }
 970
 971         guid = efi_global_variable_guid;
 972         size = sizeof(u16);
 973         ret = EFI_CALL(RT->set_variable(L"BootNext", &guid,
 974                                         EFI_VARIABLE_NON_VOLATILE |
 975                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
 976                                         EFI_VARIABLE_RUNTIME_ACCESS,
 977                                         size, &bootnext));
 978         if (ret != EFI_SUCCESS) {
 979                 printf("Cannot set BootNext\n");
 980                 r = CMD_RET_FAILURE;
 981         }
 982 out:
 983         return r;
 984 }
 985
 986 /**
 987  * do_efi_boot_order() - manage UEFI BootOrder variable
 988  *
 989  * @cmdtp:      Command table
 990  * @flag:       Command flag
 991  * @argc:       Number of arguments
 992  * @argv:       Argument array
 993  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 994  *
 995  * Implement efidebug "boot order" sub-command.
 996  * Show order of UEFI load options, or change it in BootOrder variable.
 997  *
 998  *     efidebug boot order [<id> ...]
 999  */
1000 static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag,
1001                              int argc, char * const argv[])
1002 {
1003         u16 *bootorder = NULL;
1004         efi_uintn_t size;
1005         int id, i;
1006         char *endp;
1007         efi_guid_t guid;
1008         efi_status_t ret;
1009         int r = CMD_RET_SUCCESS;
1010
1011         if (argc == 1)
1012                 return show_efi_boot_order();
1013
1014         argc--;
1015         argv++;
1016
1017         size = argc * sizeof(u16);
1018         bootorder = malloc(size);
1019         if (!bootorder)
1020                 return CMD_RET_FAILURE;
1021
1022         for (i = 0; i < argc; i++) {
1023                 id = (int)simple_strtoul(argv[i], &endp, 16);
1024                 if (*endp != '\0' || id > 0xffff) {
1025                         printf("invalid value: %s\n", argv[i]);
1026                         r = CMD_RET_FAILURE;
1027                         goto out;
1028                 }
1029
1030                 bootorder[i] = (u16)id;
1031         }
1032
1033         guid = efi_global_variable_guid;
1034         ret = EFI_CALL(RT->set_variable(L"BootOrder", &guid,
1035                                         EFI_VARIABLE_NON_VOLATILE |
1036                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
1037                                         EFI_VARIABLE_RUNTIME_ACCESS,
1038                                         size, bootorder));
1039         if (ret != EFI_SUCCESS) {
1040                 printf("Cannot set BootOrder\n");
1041                 r = CMD_RET_FAILURE;
1042         }
1043 out:
1044         free(bootorder);
1045
1046         return r;
1047 }
1048
1049 static cmd_tbl_t cmd_efidebug_boot_sub[] = {
1050         U_BOOT_CMD_MKENT(add, CONFIG_SYS_MAXARGS, 1, do_efi_boot_add, "", ""),
1051         U_BOOT_CMD_MKENT(rm, CONFIG_SYS_MAXARGS, 1, do_efi_boot_rm, "", ""),
1052         U_BOOT_CMD_MKENT(dump, CONFIG_SYS_MAXARGS, 1, do_efi_boot_dump, "", ""),
1053         U_BOOT_CMD_MKENT(next, CONFIG_SYS_MAXARGS, 1, do_efi_boot_next, "", ""),
1054         U_BOOT_CMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_efi_boot_order,
1055                          "", ""),
1056 };
1057
1058 /**
1059  * do_efi_boot_opt() - manage UEFI load options
1060  *
1061  * @cmdtp:      Command table
1062  * @flag:       Command flag
1063  * @argc:       Number of arguments
1064  * @argv:       Argument array
1065  * Return:      CMD_RET_SUCCESS on success,
1066  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
1067  *
1068  * Implement efidebug "boot" sub-command.
1069  */
1070 static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
1071                            int argc, char * const argv[])
1072 {
1073         cmd_tbl_t *cp;
1074
1075         if (argc < 2)
1076                 return CMD_RET_USAGE;
1077
1078         argc--; argv++;
1079
1080         cp = find_cmd_tbl(argv[0], cmd_efidebug_boot_sub,
1081                           ARRAY_SIZE(cmd_efidebug_boot_sub));
1082         if (!cp)
1083                 return CMD_RET_USAGE;
1084
1085         return cp->cmd(cmdtp, flag, argc, argv);
1086 }
1087
1088 static cmd_tbl_t cmd_efidebug_sub[] = {
1089         U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
1090         U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices,
1091                          "", ""),
1092         U_BOOT_CMD_MKENT(drivers, CONFIG_SYS_MAXARGS, 1, do_efi_show_drivers,
1093                          "", ""),
1094         U_BOOT_CMD_MKENT(dh, CONFIG_SYS_MAXARGS, 1, do_efi_show_handles,
1095                          "", ""),
1096         U_BOOT_CMD_MKENT(images, CONFIG_SYS_MAXARGS, 1, do_efi_show_images,
1097                          "", ""),
1098         U_BOOT_CMD_MKENT(memmap, CONFIG_SYS_MAXARGS, 1, do_efi_show_memmap,
1099                          "", ""),
1100         U_BOOT_CMD_MKENT(tables, CONFIG_SYS_MAXARGS, 1, do_efi_show_tables,
1101                          "", ""),
1102 };
1103
1104 /**
1105  * do_efidebug() - display and configure UEFI environment
1106  *
1107  * @cmdtp:      Command table
1108  * @flag:       Command flag
1109  * @argc:       Number of arguments
1110  * @argv:       Argument array
1111  * Return:      CMD_RET_SUCCESS on success,
1112  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
1113  *
1114  * Implement efidebug command which allows us to display and
1115  * configure UEFI environment.
1116  */
1117 static int do_efidebug(cmd_tbl_t *cmdtp, int flag,
1118                        int argc, char * const argv[])
1119 {
1120         cmd_tbl_t *cp;
1121         efi_status_t r;
1122
1123         if (argc < 2)
1124                 return CMD_RET_USAGE;
1125
1126         argc--; argv++;
1127
1128         /* Initialize UEFI drivers */
1129         r = efi_init_obj_list();
1130         if (r != EFI_SUCCESS) {
1131                 printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
1132                        r & ~EFI_ERROR_MASK);
1133                 return CMD_RET_FAILURE;
1134         }
1135
1136         cp = find_cmd_tbl(argv[0], cmd_efidebug_sub,
1137                           ARRAY_SIZE(cmd_efidebug_sub));
1138         if (!cp)
1139                 return CMD_RET_USAGE;
1140
1141         return cp->cmd(cmdtp, flag, argc, argv);
1142 }
1143
1144 #ifdef CONFIG_SYS_LONGHELP
1145 static char efidebug_help_text[] =
1146         "  - UEFI Shell-like interface to configure UEFI environment\n"
1147         "\n"
1148         "efidebug boot add <bootid> <label> <interface> <devnum>[:<part>] <file path> [<load options>]\n"
1149         "  - set UEFI BootXXXX variable\n"
1150         "    <load options> will be passed to UEFI application\n"
1151         "efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n"
1152         "  - delete UEFI BootXXXX variables\n"
1153         "efidebug boot dump\n"
1154         "  - dump all UEFI BootXXXX variables\n"
1155         "efidebug boot next <bootid>\n"
1156         "  - set UEFI BootNext variable\n"
1157         "efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n"
1158         "  - set/show UEFI boot order\n"
1159         "\n"
1160         "efidebug devices\n"
1161         "  - show UEFI devices\n"
1162         "efidebug drivers\n"
1163         "  - show UEFI drivers\n"
1164         "efidebug dh\n"
1165         "  - show UEFI handles\n"
1166         "efidebug images\n"
1167         "  - show loaded images\n"
1168         "efidebug memmap\n"
1169         "  - show UEFI memory map\n"
1170         "efidebug tables\n"
1171         "  - show UEFI configuration tables\n";
1172 #endif
1173
1174 U_BOOT_CMD(
1175         efidebug, 10, 0, do_efidebug,
1176         "Configure UEFI environment",
1177         efidebug_help_text
1178 );