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 <mapmem.h>
  16 #include <search.h>
  17 #include <linux/ctype.h>
  18
  19 #define BS systab.boottime
  20 #define RT systab.runtime
  21
  22 /**
  23  * efi_get_device_handle_info() - get information of UEFI device
  24  *
  25  * @handle:             Handle of UEFI device
  26  * @dev_path_text:      Pointer to text of device path
  27  * Return:              0 on success, -1 on failure
  28  *
  29  * Currently return a formatted text of device path.
  30  */
  31 static int efi_get_device_handle_info(efi_handle_t handle, u16 **dev_path_text)
  32 {
  33         struct efi_device_path *dp;
  34         efi_status_t ret;
  35
  36         ret = EFI_CALL(BS->open_protocol(handle, &efi_guid_device_path,
  37                                          (void **)&dp, NULL /* FIXME */, NULL,
  38                                          EFI_OPEN_PROTOCOL_GET_PROTOCOL));
  39         if (ret == EFI_SUCCESS) {
  40                 *dev_path_text = efi_dp_str(dp);
  41                 return 0;
  42         } else {
  43                 return -1;
  44         }
  45 }
  46
  47 #define EFI_HANDLE_WIDTH ((int)sizeof(efi_handle_t) * 2)
  48
  49 static const char spc[] = "                ";
  50 static const char sep[] = "================";
  51
  52 /**
  53  * do_efi_show_devices() - show UEFI devices
  54  *
  55  * @cmdtp:      Command table
  56  * @flag:       Command flag
  57  * @argc:       Number of arguments
  58  * @argv:       Argument array
  59  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
  60  *
  61  * Implement efidebug "devices" sub-command.
  62  * Show all UEFI devices and their information.
  63  */
  64 static int do_efi_show_devices(cmd_tbl_t *cmdtp, int flag,
  65                                int argc, char * const argv[])
  66 {
  67         efi_handle_t *handles;
  68         efi_uintn_t num, i;
  69         u16 *dev_path_text;
  70         efi_status_t ret;
  71
  72         ret = EFI_CALL(BS->locate_handle_buffer(ALL_HANDLES, NULL, NULL,
  73                                                 &num, &handles));
  74         if (ret != EFI_SUCCESS)
  75                 return CMD_RET_FAILURE;
  76
  77         if (!num)
  78                 return CMD_RET_SUCCESS;
  79
  80         printf("Device%.*s Device Path\n", EFI_HANDLE_WIDTH - 6, spc);
  81         printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
  82         for (i = 0; i < num; i++) {
  83                 if (!efi_get_device_handle_info(handles[i], &dev_path_text)) {
  84                         printf("%p %ls\n", handles[i], dev_path_text);
  85                         efi_free_pool(dev_path_text);
  86                 }
  87         }
  88
  89         EFI_CALL(BS->free_pool(handles));
  90
  91         return CMD_RET_SUCCESS;
  92 }
  93
  94 /**
  95  * efi_get_driver_handle_info() - get information of UEFI driver
  96  *
  97  * @handle:             Handle of UEFI device
  98  * @driver_name:        Driver name
  99  * @image_path:         Pointer to text of device path
 100  * Return:              0 on success, -1 on failure
 101  *
 102  * Currently return no useful information as all UEFI drivers are
 103  * built-in..
 104  */
 105 static int efi_get_driver_handle_info(efi_handle_t handle, u16 **driver_name,
 106                                       u16 **image_path)
 107 {
 108         struct efi_handler *handler;
 109         struct efi_loaded_image *image;
 110         efi_status_t ret;
 111
 112         /*
 113          * driver name
 114          * TODO: support EFI_COMPONENT_NAME2_PROTOCOL
 115          */
 116         *driver_name = NULL;
 117
 118         /* image name */
 119         ret = efi_search_protocol(handle, &efi_guid_loaded_image, &handler);
 120         if (ret != EFI_SUCCESS) {
 121                 *image_path = NULL;
 122                 return 0;
 123         }
 124
 125         image = handler->protocol_interface;
 126         *image_path = efi_dp_str(image->file_path);
 127
 128         return 0;
 129 }
 130
 131 /**
 132  * do_efi_show_drivers() - show UEFI drivers
 133  *
 134  * @cmdtp:      Command table
 135  * @flag:       Command flag
 136  * @argc:       Number of arguments
 137  * @argv:       Argument array
 138  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 139  *
 140  * Implement efidebug "drivers" sub-command.
 141  * Show all UEFI drivers and their information.
 142  */
 143 static int do_efi_show_drivers(cmd_tbl_t *cmdtp, int flag,
 144                                int argc, char * const argv[])
 145 {
 146         efi_handle_t *handles;
 147         efi_uintn_t num, i;
 148         u16 *driver_name, *image_path_text;
 149         efi_status_t ret;
 150
 151         ret = EFI_CALL(BS->locate_handle_buffer(
 152                                 BY_PROTOCOL, &efi_guid_driver_binding_protocol,
 153                                 NULL, &num, &handles));
 154         if (ret != EFI_SUCCESS)
 155                 return CMD_RET_FAILURE;
 156
 157         if (!num)
 158                 return CMD_RET_SUCCESS;
 159
 160         printf("Driver%.*s Name                 Image Path\n",
 161                EFI_HANDLE_WIDTH - 6, spc);
 162         printf("%.*s ==================== ====================\n",
 163                EFI_HANDLE_WIDTH, sep);
 164         for (i = 0; i < num; i++) {
 165                 if (!efi_get_driver_handle_info(handles[i], &driver_name,
 166                                                 &image_path_text)) {
 167                         if (image_path_text)
 168                                 printf("%p %-20ls %ls\n", handles[i],
 169                                        driver_name, image_path_text);
 170                         else
 171                                 printf("%p %-20ls <built-in>\n",
 172                                        handles[i], driver_name);
 173                         EFI_CALL(BS->free_pool(driver_name));
 174                         EFI_CALL(BS->free_pool(image_path_text));
 175                 }
 176         }
 177
 178         EFI_CALL(BS->free_pool(handles));
 179
 180         return CMD_RET_SUCCESS;
 181 }
 182
 183 static const struct {
 184         const char *text;
 185         const efi_guid_t guid;
 186 } guid_list[] = {
 187         {
 188                 "Device Path",
 189                 EFI_DEVICE_PATH_PROTOCOL_GUID,
 190         },
 191         {
 192                 "Device Path To Text",
 193                 EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID,
 194         },
 195         {
 196                 "Device Path Utilities",
 197                 EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID,
 198         },
 199         {
 200                 "Unicode Collation 2",
 201                 EFI_UNICODE_COLLATION_PROTOCOL2_GUID,
 202         },
 203         {
 204                 "Driver Binding",
 205                 EFI_DRIVER_BINDING_PROTOCOL_GUID,
 206         },
 207         {
 208                 "Simple Text Input",
 209                 EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID,
 210         },
 211         {
 212                 "Simple Text Input Ex",
 213                 EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID,
 214         },
 215         {
 216                 "Simple Text Output",
 217                 EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID,
 218         },
 219         {
 220                 "Block IO",
 221                 EFI_BLOCK_IO_PROTOCOL_GUID,
 222         },
 223         {
 224                 "Simple File System",
 225                 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID,
 226         },
 227         {
 228                 "Loaded Image",
 229                 EFI_LOADED_IMAGE_PROTOCOL_GUID,
 230         },
 231         {
 232                 "Graphics Output",
 233                 EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID,
 234         },
 235         {
 236                 "HII String",
 237                 EFI_HII_STRING_PROTOCOL_GUID,
 238         },
 239         {
 240                 "HII Database",
 241                 EFI_HII_DATABASE_PROTOCOL_GUID,
 242         },
 243         {
 244                 "HII Config Routing",
 245                 EFI_HII_CONFIG_ROUTING_PROTOCOL_GUID,
 246         },
 247         {
 248                 "Load File2",
 249                 EFI_LOAD_FILE2_PROTOCOL_GUID,
 250         },
 251         {
 252                 "Simple Network",
 253                 EFI_SIMPLE_NETWORK_PROTOCOL_GUID,
 254         },
 255         {
 256                 "PXE Base Code",
 257                 EFI_PXE_BASE_CODE_PROTOCOL_GUID,
 258         },
 259         /* Configuration table GUIDs */
 260         {
 261                 "ACPI table",
 262                 EFI_ACPI_TABLE_GUID,
 263         },
 264         {
 265                 "device tree",
 266                 EFI_FDT_GUID,
 267         },
 268         {
 269                 "SMBIOS table",
 270                 SMBIOS_TABLE_GUID,
 271         },
 272         {
 273                 "Runtime properties",
 274                 EFI_RT_PROPERTIES_TABLE_GUID,
 275         },
 276 };
 277
 278 /**
 279  * get_guid_text - get string of GUID
 280  *
 281  * Return description of GUID.
 282  *
 283  * @guid:       GUID
 284  * Return:      description of GUID or NULL
 285  */
 286 static const char *get_guid_text(const void *guid)
 287 {
 288         int i;
 289
 290         for (i = 0; i < ARRAY_SIZE(guid_list); i++) {
 291                 /*
 292                  * As guidcmp uses memcmp() we can safely accept unaligned
 293                  * GUIDs.
 294                  */
 295                 if (!guidcmp(&guid_list[i].guid, guid))
 296                         return guid_list[i].text;
 297         }
 298
 299         return NULL;
 300 }
 301
 302 /**
 303  * do_efi_show_handles() - show UEFI handles
 304  *
 305  * @cmdtp:      Command table
 306  * @flag:       Command flag
 307  * @argc:       Number of arguments
 308  * @argv:       Argument array
 309  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 310  *
 311  * Implement efidebug "dh" sub-command.
 312  * Show all UEFI handles and their information, currently all protocols
 313  * added to handle.
 314  */
 315 static int do_efi_show_handles(cmd_tbl_t *cmdtp, int flag,
 316                                int argc, char * const argv[])
 317 {
 318         efi_handle_t *handles;
 319         efi_guid_t **guid;
 320         efi_uintn_t num, count, i, j;
 321         const char *guid_text;
 322         efi_status_t ret;
 323
 324         ret = EFI_CALL(BS->locate_handle_buffer(ALL_HANDLES, NULL, NULL,
 325                                                 &num, &handles));
 326         if (ret != EFI_SUCCESS)
 327                 return CMD_RET_FAILURE;
 328
 329         if (!num)
 330                 return CMD_RET_SUCCESS;
 331
 332         printf("Handle%.*s Protocols\n", EFI_HANDLE_WIDTH - 6, spc);
 333         printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
 334         for (i = 0; i < num; i++) {
 335                 printf("%p", handles[i]);
 336                 ret = EFI_CALL(BS->protocols_per_handle(handles[i], &guid,
 337                                                         &count));
 338                 if (ret || !count) {
 339                         putc('\n');
 340                         continue;
 341                 }
 342
 343                 for (j = 0; j < count; j++) {
 344                         if (j)
 345                                 printf(", ");
 346                         else
 347                                 putc(' ');
 348
 349                         guid_text = get_guid_text(guid[j]);
 350                         if (guid_text)
 351                                 puts(guid_text);
 352                         else
 353                                 printf("%pUl", guid[j]);
 354                 }
 355                 putc('\n');
 356         }
 357
 358         EFI_CALL(BS->free_pool(handles));
 359
 360         return CMD_RET_SUCCESS;
 361 }
 362
 363 /**
 364  * do_efi_show_images() - show UEFI images
 365  *
 366  * @cmdtp:      Command table
 367  * @flag:       Command flag
 368  * @argc:       Number of arguments
 369  * @argv:       Argument array
 370  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 371  *
 372  * Implement efidebug "images" sub-command.
 373  * Show all UEFI loaded images and their information.
 374  */
 375 static int do_efi_show_images(cmd_tbl_t *cmdtp, int flag,
 376                               int argc, char * const argv[])
 377 {
 378         efi_print_image_infos(NULL);
 379
 380         return CMD_RET_SUCCESS;
 381 }
 382
 383 static const char * const efi_mem_type_string[] = {
 384         [EFI_RESERVED_MEMORY_TYPE] = "RESERVED",
 385         [EFI_LOADER_CODE] = "LOADER CODE",
 386         [EFI_LOADER_DATA] = "LOADER DATA",
 387         [EFI_BOOT_SERVICES_CODE] = "BOOT CODE",
 388         [EFI_BOOT_SERVICES_DATA] = "BOOT DATA",
 389         [EFI_RUNTIME_SERVICES_CODE] = "RUNTIME CODE",
 390         [EFI_RUNTIME_SERVICES_DATA] = "RUNTIME DATA",
 391         [EFI_CONVENTIONAL_MEMORY] = "CONVENTIONAL",
 392         [EFI_UNUSABLE_MEMORY] = "UNUSABLE MEM",
 393         [EFI_ACPI_RECLAIM_MEMORY] = "ACPI RECLAIM MEM",
 394         [EFI_ACPI_MEMORY_NVS] = "ACPI NVS",
 395         [EFI_MMAP_IO] = "IO",
 396         [EFI_MMAP_IO_PORT] = "IO PORT",
 397         [EFI_PAL_CODE] = "PAL",
 398 };
 399
 400 static const struct efi_mem_attrs {
 401         const u64 bit;
 402         const char *text;
 403 } efi_mem_attrs[] = {
 404         {EFI_MEMORY_UC, "UC"},
 405         {EFI_MEMORY_UC, "UC"},
 406         {EFI_MEMORY_WC, "WC"},
 407         {EFI_MEMORY_WT, "WT"},
 408         {EFI_MEMORY_WB, "WB"},
 409         {EFI_MEMORY_UCE, "UCE"},
 410         {EFI_MEMORY_WP, "WP"},
 411         {EFI_MEMORY_RP, "RP"},
 412         {EFI_MEMORY_XP, "WP"},
 413         {EFI_MEMORY_NV, "NV"},
 414         {EFI_MEMORY_MORE_RELIABLE, "REL"},
 415         {EFI_MEMORY_RO, "RO"},
 416         {EFI_MEMORY_RUNTIME, "RT"},
 417 };
 418
 419 /**
 420  * print_memory_attributes() - print memory map attributes
 421  *
 422  * @attributes: Attribute value
 423  *
 424  * Print memory map attributes
 425  */
 426 static void print_memory_attributes(u64 attributes)
 427 {
 428         int sep, i;
 429
 430         for (sep = 0, i = 0; i < ARRAY_SIZE(efi_mem_attrs); i++)
 431                 if (attributes & efi_mem_attrs[i].bit) {
 432                         if (sep) {
 433                                 putc('|');
 434                         } else {
 435                                 putc(' ');
 436                                 sep = 1;
 437                         }
 438                         puts(efi_mem_attrs[i].text);
 439                 }
 440 }
 441
 442 #define EFI_PHYS_ADDR_WIDTH (int)(sizeof(efi_physical_addr_t) * 2)
 443
 444 /**
 445  * do_efi_show_memmap() - show UEFI memory map
 446  *
 447  * @cmdtp:      Command table
 448  * @flag:       Command flag
 449  * @argc:       Number of arguments
 450  * @argv:       Argument array
 451  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 452  *
 453  * Implement efidebug "memmap" sub-command.
 454  * Show UEFI memory map.
 455  */
 456 static int do_efi_show_memmap(cmd_tbl_t *cmdtp, int flag,
 457                               int argc, char * const argv[])
 458 {
 459         struct efi_mem_desc *memmap = NULL, *map;
 460         efi_uintn_t map_size = 0;
 461         const char *type;
 462         int i;
 463         efi_status_t ret;
 464
 465         ret = EFI_CALL(BS->get_memory_map(&map_size, memmap, NULL, NULL, NULL));
 466         if (ret == EFI_BUFFER_TOO_SMALL) {
 467                 map_size += sizeof(struct efi_mem_desc); /* for my own */
 468                 ret = EFI_CALL(BS->allocate_pool(EFI_LOADER_DATA,
 469                                                  map_size, (void *)&memmap));
 470                 if (ret != EFI_SUCCESS)
 471                         return CMD_RET_FAILURE;
 472                 ret = EFI_CALL(BS->get_memory_map(&map_size, memmap,
 473                                                   NULL, NULL, NULL));
 474         }
 475         if (ret != EFI_SUCCESS) {
 476                 EFI_CALL(BS->free_pool(memmap));
 477                 return CMD_RET_FAILURE;
 478         }
 479
 480         printf("Type             Start%.*s End%.*s Attributes\n",
 481                EFI_PHYS_ADDR_WIDTH - 5, spc, EFI_PHYS_ADDR_WIDTH - 3, spc);
 482         printf("================ %.*s %.*s ==========\n",
 483                EFI_PHYS_ADDR_WIDTH, sep, EFI_PHYS_ADDR_WIDTH, sep);
 484         for (i = 0, map = memmap; i < map_size / sizeof(*map); map++, i++) {
 485                 if (map->type < EFI_MAX_MEMORY_TYPE)
 486                         type = efi_mem_type_string[map->type];
 487                 else
 488                         type = "(unknown)";
 489
 490                 printf("%-16s %.*llx-%.*llx", type,
 491                        EFI_PHYS_ADDR_WIDTH,
 492                        (u64)map_to_sysmem((void *)(uintptr_t)
 493                                           map->physical_start),
 494                        EFI_PHYS_ADDR_WIDTH,
 495                        (u64)map_to_sysmem((void *)(uintptr_t)
 496                                           (map->physical_start +
 497                                            map->num_pages * EFI_PAGE_SIZE)));
 498
 499                 print_memory_attributes(map->attribute);
 500                 putc('\n');
 501         }
 502
 503         EFI_CALL(BS->free_pool(memmap));
 504
 505         return CMD_RET_SUCCESS;
 506 }
 507
 508 /**
 509  * do_efi_show_tables() - show UEFI configuration tables
 510  *
 511  * @cmdtp:      Command table
 512  * @flag:       Command flag
 513  * @argc:       Number of arguments
 514  * @argv:       Argument array
 515  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 516  *
 517  * Implement efidebug "tables" sub-command.
 518  * Show UEFI configuration tables.
 519  */
 520 static int do_efi_show_tables(cmd_tbl_t *cmdtp, int flag,
 521                               int argc, char * const argv[])
 522 {
 523         efi_uintn_t i;
 524         const char *guid_str;
 525
 526         for (i = 0; i < systab.nr_tables; ++i) {
 527                 guid_str = get_guid_text(&systab.tables[i].guid);
 528                 if (!guid_str)
 529                         guid_str = "";
 530                 printf("%pUl %s\n", &systab.tables[i].guid, guid_str);
 531         }
 532
 533         return CMD_RET_SUCCESS;
 534 }
 535
 536 /**
 537  * do_efi_boot_add() - set UEFI load option
 538  *
 539  * @cmdtp:      Command table
 540  * @flag:       Command flag
 541  * @argc:       Number of arguments
 542  * @argv:       Argument array
 543  * Return:      CMD_RET_SUCCESS on success,
 544  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
 545  *
 546  * Implement efidebug "boot add" sub-command. Create or change UEFI load option.
 547  *
 548  *     efidebug boot add <id> <label> <interface> <devnum>[:<part>] <file> <options>
 549  */
 550 static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
 551                            int argc, char * const argv[])
 552 {
 553         int id;
 554         char *endp;
 555         char var_name[9];
 556         u16 var_name16[9], *p;
 557         efi_guid_t guid;
 558         size_t label_len, label_len16;
 559         u16 *label;
 560         struct efi_device_path *device_path = NULL, *file_path = NULL;
 561         struct efi_load_option lo;
 562         void *data = NULL;
 563         efi_uintn_t size;
 564         efi_status_t ret;
 565         int r = CMD_RET_SUCCESS;
 566
 567         if (argc < 6 || argc > 7)
 568                 return CMD_RET_USAGE;
 569
 570         id = (int)simple_strtoul(argv[1], &endp, 16);
 571         if (*endp != '\0' || id > 0xffff)
 572                 return CMD_RET_USAGE;
 573
 574         sprintf(var_name, "Boot%04X", id);
 575         p = var_name16;
 576         utf8_utf16_strncpy(&p, var_name, 9);
 577
 578         guid = efi_global_variable_guid;
 579
 580         /* attributes */
 581         lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */
 582
 583         /* label */
 584         label_len = strlen(argv[2]);
 585         label_len16 = utf8_utf16_strnlen(argv[2], label_len);
 586         label = malloc((label_len16 + 1) * sizeof(u16));
 587         if (!label)
 588                 return CMD_RET_FAILURE;
 589         lo.label = label; /* label will be changed below */
 590         utf8_utf16_strncpy(&label, argv[2], label_len);
 591
 592         /* file path */
 593         ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path,
 594                                &file_path);
 595         if (ret != EFI_SUCCESS) {
 596                 printf("Cannot create device path for \"%s %s\"\n",
 597                        argv[3], argv[4]);
 598                 r = CMD_RET_FAILURE;
 599                 goto out;
 600         }
 601         lo.file_path = file_path;
 602         lo.file_path_length = efi_dp_size(file_path)
 603                                 + sizeof(struct efi_device_path); /* for END */
 604
 605         /* optional data */
 606         if (argc < 6)
 607                 lo.optional_data = NULL;
 608         else
 609                 lo.optional_data = (const u8 *)argv[6];
 610
 611         size = efi_serialize_load_option(&lo, (u8 **)&data);
 612         if (!size) {
 613                 r = CMD_RET_FAILURE;
 614                 goto out;
 615         }
 616
 617         ret = EFI_CALL(RT->set_variable(var_name16, &guid,
 618                                         EFI_VARIABLE_NON_VOLATILE |
 619                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
 620                                         EFI_VARIABLE_RUNTIME_ACCESS,
 621                                         size, data));
 622         if (ret != EFI_SUCCESS) {
 623                 printf("Cannot set %ls\n", var_name16);
 624                 r = CMD_RET_FAILURE;
 625         }
 626 out:
 627         free(data);
 628         efi_free_pool(device_path);
 629         efi_free_pool(file_path);
 630         free(lo.label);
 631
 632         return r;
 633 }
 634
 635 /**
 636  * do_efi_boot_rm() - delete UEFI load options
 637  *
 638  * @cmdtp:      Command table
 639  * @flag:       Command flag
 640  * @argc:       Number of arguments
 641  * @argv:       Argument array
 642  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 643  *
 644  * Implement efidebug "boot rm" sub-command.
 645  * Delete UEFI load options.
 646  *
 647  *     efidebug boot rm <id> ...
 648  */
 649 static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag,
 650                           int argc, char * const argv[])
 651 {
 652         efi_guid_t guid;
 653         int id, i;
 654         char *endp;
 655         char var_name[9];
 656         u16 var_name16[9], *p;
 657         efi_status_t ret;
 658
 659         if (argc == 1)
 660                 return CMD_RET_USAGE;
 661
 662         guid = efi_global_variable_guid;
 663         for (i = 1; i < argc; i++, argv++) {
 664                 id = (int)simple_strtoul(argv[1], &endp, 16);
 665                 if (*endp != '\0' || id > 0xffff)
 666                         return CMD_RET_FAILURE;
 667
 668                 sprintf(var_name, "Boot%04X", id);
 669                 p = var_name16;
 670                 utf8_utf16_strncpy(&p, var_name, 9);
 671
 672                 ret = EFI_CALL(RT->set_variable(var_name16, &guid, 0, 0, NULL));
 673                 if (ret) {
 674                         printf("Cannot remove %ls\n", var_name16);
 675                         return CMD_RET_FAILURE;
 676                 }
 677         }
 678
 679         return CMD_RET_SUCCESS;
 680 }
 681
 682 /**
 683  * show_efi_boot_opt_data() - dump UEFI load option
 684  *
 685  * @id:         load option number
 686  * @data:       value of UEFI load option variable
 687  * @size:       size of the boot option
 688  *
 689  * Decode the value of UEFI load option variable and print information.
 690  */
 691 static void show_efi_boot_opt_data(int id, void *data, size_t size)
 692 {
 693         struct efi_load_option lo;
 694         char *label, *p;
 695         size_t label_len16, label_len;
 696         u16 *dp_str;
 697
 698         efi_deserialize_load_option(&lo, data);
 699
 700         label_len16 = u16_strlen(lo.label);
 701         label_len = utf16_utf8_strnlen(lo.label, label_len16);
 702         label = malloc(label_len + 1);
 703         if (!label)
 704                 return;
 705         p = label;
 706         utf16_utf8_strncpy(&p, lo.label, label_len16);
 707
 708         printf("Boot%04X:\n", id);
 709         printf("  attributes: %c%c%c (0x%08x)\n",
 710                /* ACTIVE */
 711                lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-',
 712                /* FORCE RECONNECT */
 713                lo.attributes & LOAD_OPTION_FORCE_RECONNECT ? 'R' : '-',
 714                /* HIDDEN */
 715                lo.attributes & LOAD_OPTION_HIDDEN ? 'H' : '-',
 716                lo.attributes);
 717         printf("  label: %s\n", label);
 718
 719         dp_str = efi_dp_str(lo.file_path);
 720         printf("  file_path: %ls\n", dp_str);
 721         efi_free_pool(dp_str);
 722
 723         printf("  data:\n");
 724         print_hex_dump("    ", DUMP_PREFIX_OFFSET, 16, 1,
 725                        lo.optional_data, size + (u8 *)data -
 726                        (u8 *)lo.optional_data, true);
 727         free(label);
 728 }
 729
 730 /**
 731  * show_efi_boot_opt() - dump UEFI load option
 732  *
 733  * @id:         Load option number
 734  *
 735  * Dump information defined by UEFI load option.
 736  */
 737 static void show_efi_boot_opt(int id)
 738 {
 739         char var_name[9];
 740         u16 var_name16[9], *p;
 741         efi_guid_t guid;
 742         void *data = NULL;
 743         efi_uintn_t size;
 744         efi_status_t ret;
 745
 746         sprintf(var_name, "Boot%04X", id);
 747         p = var_name16;
 748         utf8_utf16_strncpy(&p, var_name, 9);
 749         guid = efi_global_variable_guid;
 750
 751         size = 0;
 752         ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size, NULL));
 753         if (ret == EFI_BUFFER_TOO_SMALL) {
 754                 data = malloc(size);
 755                 ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
 756                                                 data));
 757         }
 758         if (ret == EFI_SUCCESS)
 759                 show_efi_boot_opt_data(id, data, size);
 760         else if (ret == EFI_NOT_FOUND)
 761                 printf("Boot%04X: not found\n", id);
 762
 763         free(data);
 764 }
 765
 766 static int u16_tohex(u16 c)
 767 {
 768         if (c >= '0' && c <= '9')
 769                 return c - '0';
 770         if (c >= 'A' && c <= 'F')
 771                 return c - 'A' + 10;
 772
 773         /* not hexadecimal */
 774         return -1;
 775 }
 776
 777 /**
 778  * show_efi_boot_dump() - dump all UEFI load options
 779  *
 780  * @cmdtp:      Command table
 781  * @flag:       Command flag
 782  * @argc:       Number of arguments
 783  * @argv:       Argument array
 784  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 785  *
 786  * Implement efidebug "boot dump" sub-command.
 787  * Dump information of all UEFI load options defined.
 788  *
 789  *     efidebug boot dump
 790  */
 791 static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
 792                             int argc, char * const argv[])
 793 {
 794         u16 *var_name16, *p;
 795         efi_uintn_t buf_size, size;
 796         efi_guid_t guid;
 797         int id, i, digit;
 798         efi_status_t ret;
 799
 800         if (argc > 1)
 801                 return CMD_RET_USAGE;
 802
 803         buf_size = 128;
 804         var_name16 = malloc(buf_size);
 805         if (!var_name16)
 806                 return CMD_RET_FAILURE;
 807
 808         var_name16[0] = 0;
 809         for (;;) {
 810                 size = buf_size;
 811                 ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
 812                                                           &guid));
 813                 if (ret == EFI_NOT_FOUND)
 814                         break;
 815                 if (ret == EFI_BUFFER_TOO_SMALL) {
 816                         buf_size = size;
 817                         p = realloc(var_name16, buf_size);
 818                         if (!p) {
 819                                 free(var_name16);
 820                                 return CMD_RET_FAILURE;
 821                         }
 822                         var_name16 = p;
 823                         ret = EFI_CALL(efi_get_next_variable_name(&size,
 824                                                                   var_name16,
 825                                                                   &guid));
 826                 }
 827                 if (ret != EFI_SUCCESS) {
 828                         free(var_name16);
 829                         return CMD_RET_FAILURE;
 830                 }
 831
 832                 if (memcmp(var_name16, L"Boot", 8))
 833                         continue;
 834
 835                 for (id = 0, i = 0; i < 4; i++) {
 836                         digit = u16_tohex(var_name16[4 + i]);
 837                         if (digit < 0)
 838                                 break;
 839                         id = (id << 4) + digit;
 840                 }
 841                 if (i == 4 && !var_name16[8])
 842                         show_efi_boot_opt(id);
 843         }
 844
 845         free(var_name16);
 846
 847         return CMD_RET_SUCCESS;
 848 }
 849
 850 /**
 851  * show_efi_boot_order() - show order of UEFI load options
 852  *
 853  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 854  *
 855  * Show order of UEFI load options defined by BootOrder variable.
 856  */
 857 static int show_efi_boot_order(void)
 858 {
 859         efi_guid_t guid;
 860         u16 *bootorder = NULL;
 861         efi_uintn_t size;
 862         int num, i;
 863         char var_name[9];
 864         u16 var_name16[9], *p16;
 865         void *data;
 866         struct efi_load_option lo;
 867         char *label, *p;
 868         size_t label_len16, label_len;
 869         efi_status_t ret;
 870
 871         guid = efi_global_variable_guid;
 872         size = 0;
 873         ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL, &size,
 874                                         NULL));
 875         if (ret == EFI_BUFFER_TOO_SMALL) {
 876                 bootorder = malloc(size);
 877                 ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL,
 878                                                 &size, bootorder));
 879         }
 880         if (ret == EFI_NOT_FOUND) {
 881                 printf("BootOrder not defined\n");
 882                 ret = CMD_RET_SUCCESS;
 883                 goto out;
 884         } else if (ret != EFI_SUCCESS) {
 885                 ret = CMD_RET_FAILURE;
 886                 goto out;
 887         }
 888
 889         num = size / sizeof(u16);
 890         for (i = 0; i < num; i++) {
 891                 sprintf(var_name, "Boot%04X", bootorder[i]);
 892                 p16 = var_name16;
 893                 utf8_utf16_strncpy(&p16, var_name, 9);
 894
 895                 size = 0;
 896                 ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
 897                                                 NULL));
 898                 if (ret != EFI_BUFFER_TOO_SMALL) {
 899                         printf("%2d: Boot%04X: (not defined)\n",
 900                                i + 1, bootorder[i]);
 901                         continue;
 902                 }
 903
 904                 data = malloc(size);
 905                 if (!data) {
 906                         ret = CMD_RET_FAILURE;
 907                         goto out;
 908                 }
 909                 ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
 910                                                 data));
 911                 if (ret != EFI_SUCCESS) {
 912                         free(data);
 913                         ret = CMD_RET_FAILURE;
 914                         goto out;
 915                 }
 916
 917                 efi_deserialize_load_option(&lo, data);
 918
 919                 label_len16 = u16_strlen(lo.label);
 920                 label_len = utf16_utf8_strnlen(lo.label, label_len16);
 921                 label = malloc(label_len + 1);
 922                 if (!label) {
 923                         free(data);
 924                         ret = CMD_RET_FAILURE;
 925                         goto out;
 926                 }
 927                 p = label;
 928                 utf16_utf8_strncpy(&p, lo.label, label_len16);
 929                 printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label);
 930                 free(label);
 931
 932                 free(data);
 933         }
 934 out:
 935         free(bootorder);
 936
 937         return ret;
 938 }
 939
 940 /**
 941  * do_efi_boot_next() - manage UEFI BootNext variable
 942  *
 943  * @cmdtp:      Command table
 944  * @flag:       Command flag
 945  * @argc:       Number of arguments
 946  * @argv:       Argument array
 947  * Return:      CMD_RET_SUCCESS on success,
 948  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
 949  *
 950  * Implement efidebug "boot next" sub-command.
 951  * Set BootNext variable.
 952  *
 953  *     efidebug boot next <id>
 954  */
 955 static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag,
 956                             int argc, char * const argv[])
 957 {
 958         u16 bootnext;
 959         efi_uintn_t size;
 960         char *endp;
 961         efi_guid_t guid;
 962         efi_status_t ret;
 963         int r = CMD_RET_SUCCESS;
 964
 965         if (argc != 2)
 966                 return CMD_RET_USAGE;
 967
 968         bootnext = (u16)simple_strtoul(argv[1], &endp, 16);
 969         if (*endp != '\0' || bootnext > 0xffff) {
 970                 printf("invalid value: %s\n", argv[1]);
 971                 r = CMD_RET_FAILURE;
 972                 goto out;
 973         }
 974
 975         guid = efi_global_variable_guid;
 976         size = sizeof(u16);
 977         ret = EFI_CALL(RT->set_variable(L"BootNext", &guid,
 978                                         EFI_VARIABLE_NON_VOLATILE |
 979                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
 980                                         EFI_VARIABLE_RUNTIME_ACCESS,
 981                                         size, &bootnext));
 982         if (ret != EFI_SUCCESS) {
 983                 printf("Cannot set BootNext\n");
 984                 r = CMD_RET_FAILURE;
 985         }
 986 out:
 987         return r;
 988 }
 989
 990 /**
 991  * do_efi_boot_order() - manage UEFI BootOrder variable
 992  *
 993  * @cmdtp:      Command table
 994  * @flag:       Command flag
 995  * @argc:       Number of arguments
 996  * @argv:       Argument array
 997  * Return:      CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
 998  *
 999  * Implement efidebug "boot order" sub-command.
1000  * Show order of UEFI load options, or change it in BootOrder variable.
1001  *
1002  *     efidebug boot order [<id> ...]
1003  */
1004 static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag,
1005                              int argc, char * const argv[])
1006 {
1007         u16 *bootorder = NULL;
1008         efi_uintn_t size;
1009         int id, i;
1010         char *endp;
1011         efi_guid_t guid;
1012         efi_status_t ret;
1013         int r = CMD_RET_SUCCESS;
1014
1015         if (argc == 1)
1016                 return show_efi_boot_order();
1017
1018         argc--;
1019         argv++;
1020
1021         size = argc * sizeof(u16);
1022         bootorder = malloc(size);
1023         if (!bootorder)
1024                 return CMD_RET_FAILURE;
1025
1026         for (i = 0; i < argc; i++) {
1027                 id = (int)simple_strtoul(argv[i], &endp, 16);
1028                 if (*endp != '\0' || id > 0xffff) {
1029                         printf("invalid value: %s\n", argv[i]);
1030                         r = CMD_RET_FAILURE;
1031                         goto out;
1032                 }
1033
1034                 bootorder[i] = (u16)id;
1035         }
1036
1037         guid = efi_global_variable_guid;
1038         ret = EFI_CALL(RT->set_variable(L"BootOrder", &guid,
1039                                         EFI_VARIABLE_NON_VOLATILE |
1040                                         EFI_VARIABLE_BOOTSERVICE_ACCESS |
1041                                         EFI_VARIABLE_RUNTIME_ACCESS,
1042                                         size, bootorder));
1043         if (ret != EFI_SUCCESS) {
1044                 printf("Cannot set BootOrder\n");
1045                 r = CMD_RET_FAILURE;
1046         }
1047 out:
1048         free(bootorder);
1049
1050         return r;
1051 }
1052
1053 static cmd_tbl_t cmd_efidebug_boot_sub[] = {
1054         U_BOOT_CMD_MKENT(add, CONFIG_SYS_MAXARGS, 1, do_efi_boot_add, "", ""),
1055         U_BOOT_CMD_MKENT(rm, CONFIG_SYS_MAXARGS, 1, do_efi_boot_rm, "", ""),
1056         U_BOOT_CMD_MKENT(dump, CONFIG_SYS_MAXARGS, 1, do_efi_boot_dump, "", ""),
1057         U_BOOT_CMD_MKENT(next, CONFIG_SYS_MAXARGS, 1, do_efi_boot_next, "", ""),
1058         U_BOOT_CMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_efi_boot_order,
1059                          "", ""),
1060 };
1061
1062 /**
1063  * do_efi_boot_opt() - manage UEFI load options
1064  *
1065  * @cmdtp:      Command table
1066  * @flag:       Command flag
1067  * @argc:       Number of arguments
1068  * @argv:       Argument array
1069  * Return:      CMD_RET_SUCCESS on success,
1070  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
1071  *
1072  * Implement efidebug "boot" sub-command.
1073  */
1074 static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
1075                            int argc, char * const argv[])
1076 {
1077         cmd_tbl_t *cp;
1078
1079         if (argc < 2)
1080                 return CMD_RET_USAGE;
1081
1082         argc--; argv++;
1083
1084         cp = find_cmd_tbl(argv[0], cmd_efidebug_boot_sub,
1085                           ARRAY_SIZE(cmd_efidebug_boot_sub));
1086         if (!cp)
1087                 return CMD_RET_USAGE;
1088
1089         return cp->cmd(cmdtp, flag, argc, argv);
1090 }
1091
1092 static cmd_tbl_t cmd_efidebug_sub[] = {
1093         U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
1094         U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices,
1095                          "", ""),
1096         U_BOOT_CMD_MKENT(drivers, CONFIG_SYS_MAXARGS, 1, do_efi_show_drivers,
1097                          "", ""),
1098         U_BOOT_CMD_MKENT(dh, CONFIG_SYS_MAXARGS, 1, do_efi_show_handles,
1099                          "", ""),
1100         U_BOOT_CMD_MKENT(images, CONFIG_SYS_MAXARGS, 1, do_efi_show_images,
1101                          "", ""),
1102         U_BOOT_CMD_MKENT(memmap, CONFIG_SYS_MAXARGS, 1, do_efi_show_memmap,
1103                          "", ""),
1104         U_BOOT_CMD_MKENT(tables, CONFIG_SYS_MAXARGS, 1, do_efi_show_tables,
1105                          "", ""),
1106 };
1107
1108 /**
1109  * do_efidebug() - display and configure UEFI environment
1110  *
1111  * @cmdtp:      Command table
1112  * @flag:       Command flag
1113  * @argc:       Number of arguments
1114  * @argv:       Argument array
1115  * Return:      CMD_RET_SUCCESS on success,
1116  *              CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
1117  *
1118  * Implement efidebug command which allows us to display and
1119  * configure UEFI environment.
1120  */
1121 static int do_efidebug(cmd_tbl_t *cmdtp, int flag,
1122                        int argc, char * const argv[])
1123 {
1124         cmd_tbl_t *cp;
1125         efi_status_t r;
1126
1127         if (argc < 2)
1128                 return CMD_RET_USAGE;
1129
1130         argc--; argv++;
1131
1132         /* Initialize UEFI drivers */
1133         r = efi_init_obj_list();
1134         if (r != EFI_SUCCESS) {
1135                 printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
1136                        r & ~EFI_ERROR_MASK);
1137                 return CMD_RET_FAILURE;
1138         }
1139
1140         cp = find_cmd_tbl(argv[0], cmd_efidebug_sub,
1141                           ARRAY_SIZE(cmd_efidebug_sub));
1142         if (!cp)
1143                 return CMD_RET_USAGE;
1144
1145         return cp->cmd(cmdtp, flag, argc, argv);
1146 }
1147
1148 #ifdef CONFIG_SYS_LONGHELP
1149 static char efidebug_help_text[] =
1150         "  - UEFI Shell-like interface to configure UEFI environment\n"
1151         "\n"
1152         "efidebug boot add <bootid> <label> <interface> <devnum>[:<part>] <file path> [<load options>]\n"
1153         "  - set UEFI BootXXXX variable\n"
1154         "    <load options> will be passed to UEFI application\n"
1155         "efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n"
1156         "  - delete UEFI BootXXXX variables\n"
1157         "efidebug boot dump\n"
1158         "  - dump all UEFI BootXXXX variables\n"
1159         "efidebug boot next <bootid>\n"
1160         "  - set UEFI BootNext variable\n"
1161         "efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n"
1162         "  - set/show UEFI boot order\n"
1163         "\n"
1164         "efidebug devices\n"
1165         "  - show UEFI devices\n"
1166         "efidebug drivers\n"
1167         "  - show UEFI drivers\n"
1168         "efidebug dh\n"
1169         "  - show UEFI handles\n"
1170         "efidebug images\n"
1171         "  - show loaded images\n"
1172         "efidebug memmap\n"
1173         "  - show UEFI memory map\n"
1174         "efidebug tables\n"
1175         "  - show UEFI configuration tables\n";
1176 #endif
1177
1178 U_BOOT_CMD(
1179         efidebug, 10, 0, do_efidebug,
1180         "Configure UEFI environment",
1181         efidebug_help_text
1182 );