cmd/bootefi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  EFI application loader
   4  *
   5  *  Copyright (c) 2016 Alexander Graf
   6  */
   7
   8 #define LOG_CATEGORY LOGC_EFI
   9
  10 #include <common.h>
  11 #include <bootm.h>
  12 #include <charset.h>
  13 #include <command.h>
  14 #include <dm.h>
  15 #include <efi_loader.h>
  16 #include <efi_selftest.h>
  17 #include <env.h>
  18 #include <errno.h>
  19 #include <image.h>
  20 #include <log.h>
  21 #include <malloc.h>
  22 #include <linux/libfdt.h>
  23 #include <linux/libfdt_env.h>
  24 #include <mapmem.h>
  25 #include <memalign.h>
  26 #include <asm-generic/sections.h>
  27 #include <linux/linkage.h>
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 static struct efi_device_path *bootefi_image_path;
  32 static struct efi_device_path *bootefi_device_path;
  33 static void *image_addr;
  34 static size_t image_size;
  35
  36 /**
  37  * efi_clear_bootdev() - clear boot device
  38  */
  39 static void efi_clear_bootdev(void)
  40 {
  41         efi_free_pool(bootefi_device_path);
  42         efi_free_pool(bootefi_image_path);
  43         bootefi_device_path = NULL;
  44         bootefi_image_path = NULL;
  45         image_addr = NULL;
  46         image_size = 0;
  47 }
  48
  49 /**
  50  * efi_set_bootdev() - set boot device
  51  *
  52  * This function is called when a file is loaded, e.g. via the 'load' command.
  53  * We use the path to this file to inform the UEFI binary about the boot device.
  54  *
  55  * @dev:                device, e.g. "MMC"
  56  * @devnr:              number of the device, e.g. "1:2"
  57  * @path:               path to file loaded
  58  * @buffer:             buffer with file loaded
  59  * @buffer_size:        size of file loaded
  60  */
  61 void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
  62                      void *buffer, size_t buffer_size)
  63 {
  64         struct efi_device_path *device, *image;
  65         efi_status_t ret;
  66
  67         /* Forget overwritten image */
  68         if (buffer + buffer_size >= image_addr &&
  69             image_addr + image_size >= buffer)
  70                 efi_clear_bootdev();
  71
  72         /* Remember only PE-COFF and FIT images */
  73         if (efi_check_pe(buffer, buffer_size, NULL) != EFI_SUCCESS) {
  74 #ifdef CONFIG_FIT
  75                 if (!fit_check_format(buffer))
  76                         return;
  77                 /*
  78                  * FIT images of type EFI_OS are started via command bootm.
  79                  * We should not use their boot device with the bootefi command.
  80                  */
  81                 buffer = 0;
  82                 buffer_size = 0;
  83 #else
  84                 return;
  85 #endif
  86         }
  87
  88         /* efi_set_bootdev() is typically called repeatedly, recover memory */
  89         efi_clear_bootdev();
  90
  91         image_addr = buffer;
  92         image_size = buffer_size;
  93
  94         ret = efi_dp_from_name(dev, devnr, path, &device, &image);
  95         if (ret == EFI_SUCCESS) {
  96                 bootefi_device_path = device;
  97                 if (image) {
  98                         /* FIXME: image should not contain device */
  99                         struct efi_device_path *image_tmp = image;
 100
 101                         efi_dp_split_file_path(image, &device, &image);
 102                         efi_free_pool(image_tmp);
 103                 }
 104                 bootefi_image_path = image;
 105         } else {
 106                 efi_clear_bootdev();
 107         }
 108 }
 109
 110 /**
 111  * efi_env_set_load_options() - set load options from environment variable
 112  *
 113  * @handle:             the image handle
 114  * @env_var:            name of the environment variable
 115  * @load_options:       pointer to load options (output)
 116  * Return:              status code
 117  */
 118 static efi_status_t efi_env_set_load_options(efi_handle_t handle,
 119                                              const char *env_var,
 120                                              u16 **load_options)
 121 {
 122         const char *env = env_get(env_var);
 123         size_t size;
 124         u16 *pos;
 125         efi_status_t ret;
 126
 127         *load_options = NULL;
 128         if (!env)
 129                 return EFI_SUCCESS;
 130         size = sizeof(u16) * (utf8_utf16_strlen(env) + 1);
 131         pos = calloc(size, 1);
 132         if (!pos)
 133                 return EFI_OUT_OF_RESOURCES;
 134         *load_options = pos;
 135         utf8_utf16_strcpy(&pos, env);
 136         ret = efi_set_load_options(handle, size, *load_options);
 137         if (ret != EFI_SUCCESS) {
 138                 free(*load_options);
 139                 *load_options = NULL;
 140         }
 141         return ret;
 142 }
 143
 144 #if !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE)
 145
 146 /**
 147  * copy_fdt() - Copy the device tree to a new location available to EFI
 148  *
 149  * The FDT is copied to a suitable location within the EFI memory map.
 150  * Additional 12 KiB are added to the space in case the device tree needs to be
 151  * expanded later with fdt_open_into().
 152  *
 153  * @fdtp:       On entry a pointer to the flattened device tree.
 154  *              On exit a pointer to the copy of the flattened device tree.
 155  *              FDT start
 156  * Return:      status code
 157  */
 158 static efi_status_t copy_fdt(void **fdtp)
 159 {
 160         unsigned long fdt_ram_start = -1L, fdt_pages;
 161         efi_status_t ret = 0;
 162         void *fdt, *new_fdt;
 163         u64 new_fdt_addr;
 164         uint fdt_size;
 165         int i;
 166
 167         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 168                 u64 ram_start = gd->bd->bi_dram[i].start;
 169                 u64 ram_size = gd->bd->bi_dram[i].size;
 170
 171                 if (!ram_size)
 172                         continue;
 173
 174                 if (ram_start < fdt_ram_start)
 175                         fdt_ram_start = ram_start;
 176         }
 177
 178         /*
 179          * Give us at least 12 KiB of breathing room in case the device tree
 180          * needs to be expanded later.
 181          */
 182         fdt = *fdtp;
 183         fdt_pages = efi_size_in_pages(fdt_totalsize(fdt) + 0x3000);
 184         fdt_size = fdt_pages << EFI_PAGE_SHIFT;
 185
 186         /*
 187          * Safe fdt location is at 127 MiB.
 188          * On the sandbox convert from the sandbox address space.
 189          */
 190         new_fdt_addr = (uintptr_t)map_sysmem(fdt_ram_start + 0x7f00000 +
 191                                              fdt_size, 0);
 192         ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
 193                                  EFI_ACPI_RECLAIM_MEMORY, fdt_pages,
 194                                  &new_fdt_addr);
 195         if (ret != EFI_SUCCESS) {
 196                 /* If we can't put it there, put it somewhere */
 197                 new_fdt_addr = (ulong)memalign(EFI_PAGE_SIZE, fdt_size);
 198                 ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
 199                                          EFI_ACPI_RECLAIM_MEMORY, fdt_pages,
 200                                          &new_fdt_addr);
 201                 if (ret != EFI_SUCCESS) {
 202                         log_err("ERROR: Failed to reserve space for FDT\n");
 203                         goto done;
 204                 }
 205         }
 206         new_fdt = (void *)(uintptr_t)new_fdt_addr;
 207         memcpy(new_fdt, fdt, fdt_totalsize(fdt));
 208         fdt_set_totalsize(new_fdt, fdt_size);
 209
 210         *fdtp = (void *)(uintptr_t)new_fdt_addr;
 211 done:
 212         return ret;
 213 }
 214
 215 /**
 216  * get_config_table() - get configuration table
 217  *
 218  * @guid:       GUID of the configuration table
 219  * Return:      pointer to configuration table or NULL
 220  */
 221 static void *get_config_table(const efi_guid_t *guid)
 222 {
 223         size_t i;
 224
 225         for (i = 0; i < systab.nr_tables; i++) {
 226                 if (!guidcmp(guid, &systab.tables[i].guid))
 227                         return systab.tables[i].table;
 228         }
 229         return NULL;
 230 }
 231
 232 #endif /* !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE) */
 233
 234 /**
 235  * efi_install_fdt() - install device tree
 236  *
 237  * If fdt is not EFI_FDT_USE_INTERNAL, the device tree located at that memory
 238  * address will will be installed as configuration table, otherwise the device
 239  * tree located at the address indicated by environment variable fdt_addr or as
 240  * fallback fdtcontroladdr will be used.
 241  *
 242  * On architectures using ACPI tables device trees shall not be installed as
 243  * configuration table.
 244  *
 245  * @fdt:        address of device tree or EFI_FDT_USE_INTERNAL to use the
 246  *              the hardware device tree as indicated by environment variable
 247  *              fdt_addr or as fallback the internal device tree as indicated by
 248  *              the environment variable fdtcontroladdr
 249  * Return:      status code
 250  */
 251 efi_status_t efi_install_fdt(void *fdt)
 252 {
 253         /*
 254          * The EBBR spec requires that we have either an FDT or an ACPI table
 255          * but not both.
 256          */
 257 #if CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE)
 258         if (fdt) {
 259                 log_err("ERROR: can't have ACPI table and device tree.\n");
 260                 return EFI_LOAD_ERROR;
 261         }
 262 #else
 263         bootm_headers_t img = { 0 };
 264         efi_status_t ret;
 265
 266         if (fdt == EFI_FDT_USE_INTERNAL) {
 267                 const char *fdt_opt;
 268                 uintptr_t fdt_addr;
 269
 270                 /* Look for device tree that is already installed */
 271                 if (get_config_table(&efi_guid_fdt))
 272                         return EFI_SUCCESS;
 273                 /* Check if there is a hardware device tree */
 274                 fdt_opt = env_get("fdt_addr");
 275                 /* Use our own device tree as fallback */
 276                 if (!fdt_opt) {
 277                         fdt_opt = env_get("fdtcontroladdr");
 278                         if (!fdt_opt) {
 279                                 log_err("ERROR: need device tree\n");
 280                                 return EFI_NOT_FOUND;
 281                         }
 282                 }
 283                 fdt_addr = simple_strtoul(fdt_opt, NULL, 16);
 284                 if (!fdt_addr) {
 285                         log_err("ERROR: invalid $fdt_addr or $fdtcontroladdr\n");
 286                         return EFI_LOAD_ERROR;
 287                 }
 288                 fdt = map_sysmem(fdt_addr, 0);
 289         }
 290
 291         /* Install device tree */
 292         if (fdt_check_header(fdt)) {
 293                 log_err("ERROR: invalid device tree\n");
 294                 return EFI_LOAD_ERROR;
 295         }
 296
 297         /* Prepare device tree for payload */
 298         ret = copy_fdt(&fdt);
 299         if (ret) {
 300                 log_err("ERROR: out of memory\n");
 301                 return EFI_OUT_OF_RESOURCES;
 302         }
 303
 304         if (image_setup_libfdt(&img, fdt, 0, NULL)) {
 305                 log_err("ERROR: failed to process device tree\n");
 306                 return EFI_LOAD_ERROR;
 307         }
 308
 309         /* Create memory reservations as indicated by the device tree */
 310         efi_carve_out_dt_rsv(fdt);
 311
 312         /* Install device tree as UEFI table */
 313         ret = efi_install_configuration_table(&efi_guid_fdt, fdt);
 314         if (ret != EFI_SUCCESS) {
 315                 log_err("ERROR: failed to install device tree\n");
 316                 return ret;
 317         }
 318 #endif /* GENERATE_ACPI_TABLE */
 319
 320         return EFI_SUCCESS;
 321 }
 322
 323 /**
 324  * do_bootefi_exec() - execute EFI binary
 325  *
 326  * The image indicated by @handle is started. When it returns the allocated
 327  * memory for the @load_options is freed.
 328  *
 329  * @handle:             handle of loaded image
 330  * @load_options:       load options
 331  * Return:              status code
 332  *
 333  * Load the EFI binary into a newly assigned memory unwinding the relocation
 334  * information, install the loaded image protocol, and call the binary.
 335  */
 336 static efi_status_t do_bootefi_exec(efi_handle_t handle, void *load_options)
 337 {
 338         efi_status_t ret;
 339         efi_uintn_t exit_data_size = 0;
 340         u16 *exit_data = NULL;
 341
 342         /* On ARM switch from EL3 or secure mode to EL2 or non-secure mode */
 343         switch_to_non_secure_mode();
 344
 345         /* Call our payload! */
 346         ret = EFI_CALL(efi_start_image(handle, &exit_data_size, &exit_data));
 347         if (ret != EFI_SUCCESS) {
 348                 log_err("## Application failed, r = %lu\n",
 349                         ret & ~EFI_ERROR_MASK);
 350                 if (exit_data) {
 351                         log_err("## %ls\n", exit_data);
 352                         efi_free_pool(exit_data);
 353                 }
 354         }
 355
 356         efi_restore_gd();
 357
 358         free(load_options);
 359
 360         return ret;
 361 }
 362
 363 /**
 364  * do_efibootmgr() - execute EFI boot manager
 365  *
 366  * Return:      status code
 367  */
 368 static int do_efibootmgr(void)
 369 {
 370         efi_handle_t handle;
 371         efi_status_t ret;
 372         void *load_options;
 373
 374         ret = efi_bootmgr_load(&handle, &load_options);
 375         if (ret != EFI_SUCCESS) {
 376                 log_notice("EFI boot manager: Cannot load any image\n");
 377                 return CMD_RET_FAILURE;
 378         }
 379
 380         ret = do_bootefi_exec(handle, load_options);
 381
 382         if (ret != EFI_SUCCESS)
 383                 return CMD_RET_FAILURE;
 384
 385         return CMD_RET_SUCCESS;
 386 }
 387
 388 /**
 389  * do_bootefi_image() - execute EFI binary
 390  *
 391  * Set up memory image for the binary to be loaded, prepare device path, and
 392  * then call do_bootefi_exec() to execute it.
 393  *
 394  * @image_opt:  string of image start address
 395  * Return:      status code
 396  */
 397 static int do_bootefi_image(const char *image_opt)
 398 {
 399         void *image_buf;
 400         unsigned long addr, size;
 401         efi_status_t ret;
 402
 403 #ifdef CONFIG_CMD_BOOTEFI_HELLO
 404         if (!strcmp(image_opt, "hello")) {
 405                 image_buf = __efi_helloworld_begin;
 406                 size = __efi_helloworld_end - __efi_helloworld_begin;
 407                 efi_clear_bootdev();
 408         } else
 409 #endif
 410         {
 411                 addr = strtoul(image_opt, NULL, 16);
 412                 /* Check that a numeric value was passed */
 413                 if (!addr)
 414                         return CMD_RET_USAGE;
 415
 416                 image_buf = map_sysmem(addr, 0);
 417
 418                 if (image_buf != image_addr) {
 419                         log_err("No UEFI binary known at %s\n", image_opt);
 420                         return CMD_RET_FAILURE;
 421                 }
 422                 size = image_size;
 423         }
 424         ret = efi_run_image(image_buf, size);
 425
 426         if (ret != EFI_SUCCESS)
 427                 return CMD_RET_FAILURE;
 428
 429         return CMD_RET_SUCCESS;
 430 }
 431
 432 /**
 433  * efi_run_image() - run loaded UEFI image
 434  *
 435  * @source_buffer:      memory address of the UEFI image
 436  * @source_size:        size of the UEFI image
 437  * Return:              status code
 438  */
 439 efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
 440 {
 441         efi_handle_t mem_handle = NULL, handle;
 442         struct efi_device_path *file_path = NULL;
 443         struct efi_device_path *msg_path;
 444         efi_status_t ret;
 445         u16 *load_options;
 446
 447         if (!bootefi_device_path || !bootefi_image_path) {
 448                 /*
 449                  * Special case for efi payload not loaded from disk,
 450                  * such as 'bootefi hello' or for example payload
 451                  * loaded directly into memory via JTAG, etc:
 452                  */
 453                 file_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE,
 454                                             (uintptr_t)source_buffer,
 455                                             source_size);
 456                 /*
 457                  * Make sure that device for device_path exist
 458                  * in load_image(). Otherwise, shell and grub will fail.
 459                  */
 460                 ret = efi_create_handle(&mem_handle);
 461                 if (ret != EFI_SUCCESS)
 462                         goto out;
 463
 464                 ret = efi_add_protocol(mem_handle, &efi_guid_device_path,
 465                                        file_path);
 466                 if (ret != EFI_SUCCESS)
 467                         goto out;
 468                 msg_path = file_path;
 469         } else {
 470                 file_path = efi_dp_append(bootefi_device_path,
 471                                           bootefi_image_path);
 472                 msg_path = bootefi_image_path;
 473         }
 474
 475         log_info("Booting %pD\n", msg_path);
 476
 477         ret = EFI_CALL(efi_load_image(false, efi_root, file_path, source_buffer,
 478                                       source_size, &handle));
 479         if (ret != EFI_SUCCESS) {
 480                 log_err("Loading image failed\n");
 481                 goto out;
 482         }
 483
 484         /* Transfer environment variable as load options */
 485         ret = efi_env_set_load_options(handle, "bootargs", &load_options);
 486         if (ret != EFI_SUCCESS)
 487                 goto out;
 488
 489         ret = do_bootefi_exec(handle, load_options);
 490
 491 out:
 492         efi_delete_handle(mem_handle);
 493         efi_free_pool(file_path);
 494         return ret;
 495 }
 496
 497 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
 498 static efi_status_t bootefi_run_prepare(const char *load_options_path,
 499                 struct efi_device_path *device_path,
 500                 struct efi_device_path *image_path,
 501                 struct efi_loaded_image_obj **image_objp,
 502                 struct efi_loaded_image **loaded_image_infop)
 503 {
 504         efi_status_t ret;
 505         u16 *load_options;
 506
 507         ret = efi_setup_loaded_image(device_path, image_path, image_objp,
 508                                      loaded_image_infop);
 509         if (ret != EFI_SUCCESS)
 510                 return ret;
 511
 512         /* Transfer environment variable as load options */
 513         return efi_env_set_load_options((efi_handle_t)*image_objp,
 514                                         load_options_path,
 515                                         &load_options);
 516 }
 517
 518 /**
 519  * bootefi_test_prepare() - prepare to run an EFI test
 520  *
 521  * Prepare to run a test as if it were provided by a loaded image.
 522  *
 523  * @image_objp:         pointer to be set to the loaded image handle
 524  * @loaded_image_infop: pointer to be set to the loaded image protocol
 525  * @path:               dummy file path used to construct the device path
 526  *                      set in the loaded image protocol
 527  * @load_options_path:  name of a U-Boot environment variable. Its value is
 528  *                      set as load options in the loaded image protocol.
 529  * Return:              status code
 530  */
 531 static efi_status_t bootefi_test_prepare
 532                 (struct efi_loaded_image_obj **image_objp,
 533                  struct efi_loaded_image **loaded_image_infop, const char *path,
 534                  const char *load_options_path)
 535 {
 536         efi_status_t ret;
 537
 538         /* Construct a dummy device path */
 539         bootefi_device_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE, 0, 0);
 540         if (!bootefi_device_path)
 541                 return EFI_OUT_OF_RESOURCES;
 542
 543         bootefi_image_path = efi_dp_from_file(NULL, 0, path);
 544         if (!bootefi_image_path) {
 545                 ret = EFI_OUT_OF_RESOURCES;
 546                 goto failure;
 547         }
 548
 549         ret = bootefi_run_prepare(load_options_path, bootefi_device_path,
 550                                   bootefi_image_path, image_objp,
 551                                   loaded_image_infop);
 552         if (ret == EFI_SUCCESS)
 553                 return ret;
 554
 555 failure:
 556         efi_clear_bootdev();
 557         return ret;
 558 }
 559
 560 /**
 561  * bootefi_run_finish() - finish up after running an EFI test
 562  *
 563  * @loaded_image_info: Pointer to a struct which holds the loaded image info
 564  * @image_obj: Pointer to a struct which holds the loaded image object
 565  */
 566 static void bootefi_run_finish(struct efi_loaded_image_obj *image_obj,
 567                                struct efi_loaded_image *loaded_image_info)
 568 {
 569         efi_restore_gd();
 570         free(loaded_image_info->load_options);
 571         efi_delete_handle(&image_obj->header);
 572 }
 573
 574 /**
 575  * do_efi_selftest() - execute EFI selftest
 576  *
 577  * Return:      status code
 578  */
 579 static int do_efi_selftest(void)
 580 {
 581         struct efi_loaded_image_obj *image_obj;
 582         struct efi_loaded_image *loaded_image_info;
 583         efi_status_t ret;
 584
 585         ret = bootefi_test_prepare(&image_obj, &loaded_image_info,
 586                                    "\\selftest", "efi_selftest");
 587         if (ret != EFI_SUCCESS)
 588                 return CMD_RET_FAILURE;
 589
 590         /* Execute the test */
 591         ret = EFI_CALL(efi_selftest(&image_obj->header, &systab));
 592         bootefi_run_finish(image_obj, loaded_image_info);
 593
 594         return ret != EFI_SUCCESS;
 595 }
 596 #endif /* CONFIG_CMD_BOOTEFI_SELFTEST */
 597
 598 /**
 599  * do_bootefi() - execute `bootefi` command
 600  *
 601  * @cmdtp:      table entry describing command
 602  * @flag:       bitmap indicating how the command was invoked
 603  * @argc:       number of arguments
 604  * @argv:       command line arguments
 605  * Return:      status code
 606  */
 607 static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
 608                       char *const argv[])
 609 {
 610         efi_status_t ret;
 611         void *fdt;
 612
 613         if (argc < 2)
 614                 return CMD_RET_USAGE;
 615
 616         /* Initialize EFI drivers */
 617         ret = efi_init_obj_list();
 618         if (ret != EFI_SUCCESS) {
 619                 log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
 620                         ret & ~EFI_ERROR_MASK);
 621                 return CMD_RET_FAILURE;
 622         }
 623
 624         if (argc > 2) {
 625                 uintptr_t fdt_addr;
 626
 627                 fdt_addr = simple_strtoul(argv[2], NULL, 16);
 628                 fdt = map_sysmem(fdt_addr, 0);
 629         } else {
 630                 fdt = EFI_FDT_USE_INTERNAL;
 631         }
 632         ret = efi_install_fdt(fdt);
 633         if (ret == EFI_INVALID_PARAMETER)
 634                 return CMD_RET_USAGE;
 635         else if (ret != EFI_SUCCESS)
 636                 return CMD_RET_FAILURE;
 637
 638         if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
 639                 if (!strcmp(argv[1], "bootmgr"))
 640                         return do_efibootmgr();
 641         }
 642 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
 643         if (!strcmp(argv[1], "selftest"))
 644                 return do_efi_selftest();
 645 #endif
 646
 647         return do_bootefi_image(argv[1]);
 648 }
 649
 650 #ifdef CONFIG_SYS_LONGHELP
 651 static char bootefi_help_text[] =
 652         "<image address> [fdt address]\n"
 653         "  - boot EFI payload stored at address <image address>.\n"
 654         "    If specified, the device tree located at <fdt address> gets\n"
 655         "    exposed as EFI configuration table.\n"
 656 #ifdef CONFIG_CMD_BOOTEFI_HELLO
 657         "bootefi hello\n"
 658         "  - boot a sample Hello World application stored within U-Boot\n"
 659 #endif
 660 #ifdef CONFIG_CMD_BOOTEFI_SELFTEST
 661         "bootefi selftest [fdt address]\n"
 662         "  - boot an EFI selftest application stored within U-Boot\n"
 663         "    Use environment variable efi_selftest to select a single test.\n"
 664         "    Use 'setenv efi_selftest list' to enumerate all tests.\n"
 665 #endif
 666 #ifdef CONFIG_CMD_BOOTEFI_BOOTMGR
 667         "bootefi bootmgr [fdt address]\n"
 668         "  - load and boot EFI payload based on BootOrder/BootXXXX variables.\n"
 669         "\n"
 670         "    If specified, the device tree located at <fdt address> gets\n"
 671         "    exposed as EFI configuration table.\n"
 672 #endif
 673         ;
 674 #endif
 675
 676 U_BOOT_CMD(
 677         bootefi, 3, 0, do_bootefi,
 678         "Boots an EFI payload from memory",
 679         bootefi_help_text
 680 );