arch/x86/lib/zimage.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2011 The Chromium OS Authors.
   4  * (C) Copyright 2002
   5  * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
   6  */
   7
   8 /*
   9  * Linux x86 zImage and bzImage loading
  10  *
  11  * based on the procdure described in
  12  * linux/Documentation/i386/boot.txt
  13  */
  14
  15 #define LOG_CATEGORY    LOGC_BOOT
  16
  17 #include <common.h>
  18 #include <bootm.h>
  19 #include <command.h>
  20 #include <env.h>
  21 #include <irq_func.h>
  22 #include <log.h>
  23 #include <malloc.h>
  24 #include <acpi/acpi_table.h>
  25 #include <asm/io.h>
  26 #include <asm/ptrace.h>
  27 #include <asm/zimage.h>
  28 #include <asm/byteorder.h>
  29 #include <asm/bootm.h>
  30 #include <asm/bootparam.h>
  31 #ifdef CONFIG_SYS_COREBOOT
  32 #include <asm/arch/timestamp.h>
  33 #endif
  34 #include <linux/compiler.h>
  35 #include <linux/ctype.h>
  36 #include <linux/libfdt.h>
  37
  38 /*
  39  * Memory lay-out:
  40  *
  41  * relative to setup_base (which is 0x90000 currently)
  42  *
  43  *      0x0000-0x7FFF   Real mode kernel
  44  *      0x8000-0x8FFF   Stack and heap
  45  *      0x9000-0x90FF   Kernel command line
  46  */
  47 #define DEFAULT_SETUP_BASE      0x90000
  48 #define COMMAND_LINE_OFFSET     0x9000
  49 #define HEAP_END_OFFSET         0x8e00
  50
  51 #define COMMAND_LINE_SIZE       2048
  52
  53 /**
  54  * struct zboot_state - Current state of the boot
  55  *
  56  * @bzimage_addr: Address of the bzImage to boot
  57  * @bzimage_size: Size of the bzImage, or 0 to detect this
  58  * @initrd_addr: Address of the initial ramdisk, or 0 if none
  59  * @initrd_size: Size of the initial ramdisk, or 0 if none
  60  * @load_address: Address where the bzImage is moved before booting, either
  61  *      BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
  62  * @base_ptr: Pointer to the boot parameters, typically at address
  63  *      DEFAULT_SETUP_BASE
  64  * @cmdline: Environment variable containing the 'override' command line, or
  65  *      NULL to use the one in the setup block
  66  */
  67 struct zboot_state {
  68         ulong bzimage_addr;
  69         ulong bzimage_size;
  70         ulong initrd_addr;
  71         ulong initrd_size;
  72         ulong load_address;
  73         struct boot_params *base_ptr;
  74         char *cmdline;
  75 } state;
  76
  77 enum {
  78         ZBOOT_STATE_START       = BIT(0),
  79         ZBOOT_STATE_LOAD        = BIT(1),
  80         ZBOOT_STATE_SETUP       = BIT(2),
  81         ZBOOT_STATE_INFO        = BIT(3),
  82         ZBOOT_STATE_GO          = BIT(4),
  83
  84         /* This one doesn't execute automatically, so stop the count before 5 */
  85         ZBOOT_STATE_DUMP        = BIT(5),
  86         ZBOOT_STATE_COUNT       = 5,
  87 };
  88
  89 static void build_command_line(char *command_line, int auto_boot)
  90 {
  91         char *env_command_line;
  92
  93         command_line[0] = '\0';
  94
  95         env_command_line =  env_get("bootargs");
  96
  97         /* set console= argument if we use a serial console */
  98         if (!strstr(env_command_line, "console=")) {
  99                 if (!strcmp(env_get("stdout"), "serial")) {
 100
 101                         /* We seem to use serial console */
 102                         sprintf(command_line, "console=ttyS0,%s ",
 103                                 env_get("baudrate"));
 104                 }
 105         }
 106
 107         if (auto_boot)
 108                 strcat(command_line, "auto ");
 109
 110         if (env_command_line)
 111                 strcat(command_line, env_command_line);
 112
 113         printf("Kernel command line: \"%s\"\n", command_line);
 114 }
 115
 116 static int kernel_magic_ok(struct setup_header *hdr)
 117 {
 118         if (KERNEL_MAGIC != hdr->boot_flag) {
 119                 printf("Error: Invalid Boot Flag "
 120                         "(found 0x%04x, expected 0x%04x)\n",
 121                         hdr->boot_flag, KERNEL_MAGIC);
 122                 return 0;
 123         } else {
 124                 printf("Valid Boot Flag\n");
 125                 return 1;
 126         }
 127 }
 128
 129 static int get_boot_protocol(struct setup_header *hdr, bool verbose)
 130 {
 131         if (hdr->header == KERNEL_V2_MAGIC) {
 132                 if (verbose)
 133                         printf("Magic signature found\n");
 134                 return hdr->version;
 135         } else {
 136                 /* Very old kernel */
 137                 if (verbose)
 138                         printf("Magic signature not found\n");
 139                 return 0x0100;
 140         }
 141 }
 142
 143 static int setup_device_tree(struct setup_header *hdr, const void *fdt_blob)
 144 {
 145         int bootproto = get_boot_protocol(hdr, false);
 146         struct setup_data *sd;
 147         int size;
 148
 149         if (bootproto < 0x0209)
 150                 return -ENOTSUPP;
 151
 152         if (!fdt_blob)
 153                 return 0;
 154
 155         size = fdt_totalsize(fdt_blob);
 156         if (size < 0)
 157                 return -EINVAL;
 158
 159         size += sizeof(struct setup_data);
 160         sd = (struct setup_data *)malloc(size);
 161         if (!sd) {
 162                 printf("Not enough memory for DTB setup data\n");
 163                 return -ENOMEM;
 164         }
 165
 166         sd->next = hdr->setup_data;
 167         sd->type = SETUP_DTB;
 168         sd->len = fdt_totalsize(fdt_blob);
 169         memcpy(sd->data, fdt_blob, sd->len);
 170         hdr->setup_data = (unsigned long)sd;
 171
 172         return 0;
 173 }
 174
 175 static const char *get_kernel_version(struct boot_params *params,
 176                                       void *kernel_base)
 177 {
 178         struct setup_header *hdr = &params->hdr;
 179         int bootproto;
 180         const char *s, *end;
 181
 182         bootproto = get_boot_protocol(hdr, false);
 183         if (bootproto < 0x0200 || hdr->setup_sects < 15)
 184                 return NULL;
 185
 186         /* sanity-check the kernel version in case it is missing */
 187         for (s = kernel_base + hdr->kernel_version + 0x200, end = s + 0x100; *s;
 188              s++) {
 189                 if (!isprint(*s))
 190                         return NULL;
 191         }
 192
 193         return kernel_base + hdr->kernel_version + 0x200;
 194 }
 195
 196 struct boot_params *load_zimage(char *image, unsigned long kernel_size,
 197                                 ulong *load_addressp)
 198 {
 199         struct boot_params *setup_base;
 200         const char *version;
 201         int setup_size;
 202         int bootproto;
 203         int big_image;
 204
 205         struct boot_params *params = (struct boot_params *)image;
 206         struct setup_header *hdr = &params->hdr;
 207
 208         /* base address for real-mode segment */
 209         setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;
 210
 211         if (!kernel_magic_ok(hdr))
 212                 return 0;
 213
 214         /* determine size of setup */
 215         if (0 == hdr->setup_sects) {
 216                 log_warning("Setup Sectors = 0 (defaulting to 4)\n");
 217                 setup_size = 5 * 512;
 218         } else {
 219                 setup_size = (hdr->setup_sects + 1) * 512;
 220         }
 221
 222         log_debug("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
 223
 224         if (setup_size > SETUP_MAX_SIZE)
 225                 printf("Error: Setup is too large (%d bytes)\n", setup_size);
 226
 227         /* determine boot protocol version */
 228         bootproto = get_boot_protocol(hdr, true);
 229
 230         log_debug("Using boot protocol version %x.%02x\n",
 231                   (bootproto & 0xff00) >> 8, bootproto & 0xff);
 232
 233         version = get_kernel_version(params, image);
 234         if (version)
 235                 printf("Linux kernel version %s\n", version);
 236         else
 237                 printf("Setup Sectors < 15 - Cannot print kernel version\n");
 238
 239         /* Determine image type */
 240         big_image = (bootproto >= 0x0200) &&
 241                     (hdr->loadflags & BIG_KERNEL_FLAG);
 242
 243         /* Determine load address */
 244         if (big_image)
 245                 *load_addressp = BZIMAGE_LOAD_ADDR;
 246         else
 247                 *load_addressp = ZIMAGE_LOAD_ADDR;
 248
 249         printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
 250         memset(setup_base, 0, sizeof(*setup_base));
 251         setup_base->hdr = params->hdr;
 252
 253         if (bootproto >= 0x0204)
 254                 kernel_size = hdr->syssize * 16;
 255         else
 256                 kernel_size -= setup_size;
 257
 258         if (bootproto == 0x0100) {
 259                 /*
 260                  * A very old kernel MUST have its real-mode code
 261                  * loaded at 0x90000
 262                  */
 263                 if ((ulong)setup_base != 0x90000) {
 264                         /* Copy the real-mode kernel */
 265                         memmove((void *)0x90000, setup_base, setup_size);
 266
 267                         /* Copy the command line */
 268                         memmove((void *)0x99000,
 269                                 (u8 *)setup_base + COMMAND_LINE_OFFSET,
 270                                 COMMAND_LINE_SIZE);
 271
 272                          /* Relocated */
 273                         setup_base = (struct boot_params *)0x90000;
 274                 }
 275
 276                 /* It is recommended to clear memory up to the 32K mark */
 277                 memset((u8 *)0x90000 + setup_size, 0,
 278                        SETUP_MAX_SIZE - setup_size);
 279         }
 280
 281         if (big_image) {
 282                 if (kernel_size > BZIMAGE_MAX_SIZE) {
 283                         printf("Error: bzImage kernel too big! "
 284                                 "(size: %ld, max: %d)\n",
 285                                 kernel_size, BZIMAGE_MAX_SIZE);
 286                         return 0;
 287                 }
 288         } else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
 289                 printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
 290                        kernel_size, ZIMAGE_MAX_SIZE);
 291                 return 0;
 292         }
 293
 294         printf("Loading %s at address %lx (%ld bytes)\n",
 295                big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);
 296
 297         memmove((void *)*load_addressp, image + setup_size, kernel_size);
 298
 299         return setup_base;
 300 }
 301
 302 int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
 303                  ulong initrd_addr, ulong initrd_size, ulong cmdline_force)
 304 {
 305         struct setup_header *hdr = &setup_base->hdr;
 306         int bootproto = get_boot_protocol(hdr, false);
 307
 308         log_debug("Setup E820 entries\n");
 309         setup_base->e820_entries = install_e820_map(
 310                 ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
 311
 312         if (bootproto == 0x0100) {
 313                 setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
 314                 setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
 315         }
 316         if (bootproto >= 0x0200) {
 317                 hdr->type_of_loader = 0x80;     /* U-Boot version 0 */
 318                 if (initrd_addr) {
 319                         printf("Initial RAM disk at linear address "
 320                                "0x%08lx, size %ld bytes\n",
 321                                initrd_addr, initrd_size);
 322
 323                         hdr->ramdisk_image = initrd_addr;
 324                         hdr->ramdisk_size = initrd_size;
 325                 }
 326         }
 327
 328         if (bootproto >= 0x0201) {
 329                 hdr->heap_end_ptr = HEAP_END_OFFSET;
 330                 hdr->loadflags |= HEAP_FLAG;
 331         }
 332
 333         if (cmd_line) {
 334                 int max_size = 0xff;
 335                 int ret;
 336
 337                 log_debug("Setup cmdline\n");
 338                 if (bootproto >= 0x0206)
 339                         max_size = hdr->cmdline_size;
 340                 if (bootproto >= 0x0202) {
 341                         hdr->cmd_line_ptr = (uintptr_t)cmd_line;
 342                 } else if (bootproto >= 0x0200) {
 343                         setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
 344                         setup_base->screen_info.cl_offset =
 345                                 (uintptr_t)cmd_line - (uintptr_t)setup_base;
 346
 347                         hdr->setup_move_size = 0x9100;
 348                 }
 349
 350                 /* build command line at COMMAND_LINE_OFFSET */
 351                 if (cmdline_force)
 352                         strcpy(cmd_line, (char *)cmdline_force);
 353                 else
 354                         build_command_line(cmd_line, auto_boot);
 355                 ret = bootm_process_cmdline(cmd_line, max_size, BOOTM_CL_ALL);
 356                 if (ret) {
 357                         printf("Cmdline setup failed (err=%d)\n", ret);
 358                         return ret;
 359                 }
 360                 printf("Kernel command line: \"");
 361                 puts(cmd_line);
 362                 printf("\"\n");
 363         }
 364
 365         if (IS_ENABLED(CONFIG_INTEL_MID) && bootproto >= 0x0207)
 366                 hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
 367
 368         if (IS_ENABLED(CONFIG_GENERATE_ACPI_TABLE))
 369                 setup_base->acpi_rsdp_addr = acpi_get_rsdp_addr();
 370
 371         log_debug("Setup devicetree\n");
 372         setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
 373         setup_video(&setup_base->screen_info);
 374
 375         if (IS_ENABLED(CONFIG_EFI_STUB))
 376                 setup_efi_info(&setup_base->efi_info);
 377
 378         return 0;
 379 }
 380
 381 static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
 382                           char *const argv[])
 383 {
 384         const char *s;
 385
 386         memset(&state, '\0', sizeof(state));
 387         if (argc >= 2) {
 388                 /* argv[1] holds the address of the bzImage */
 389                 s = argv[1];
 390         } else {
 391                 s = env_get("fileaddr");
 392         }
 393
 394         if (s)
 395                 state.bzimage_addr = simple_strtoul(s, NULL, 16);
 396
 397         if (argc >= 3) {
 398                 /* argv[2] holds the size of the bzImage */
 399                 state.bzimage_size = simple_strtoul(argv[2], NULL, 16);
 400         }
 401
 402         if (argc >= 4)
 403                 state.initrd_addr = simple_strtoul(argv[3], NULL, 16);
 404         if (argc >= 5)
 405                 state.initrd_size = simple_strtoul(argv[4], NULL, 16);
 406         if (argc >= 6) {
 407                 /*
 408                  * When the base_ptr is passed in, we assume that the image is
 409                  * already loaded at the address given by argv[1] and therefore
 410                  * the original bzImage is somewhere else, or not accessible.
 411                  * In any case, we don't need access to the bzImage since all
 412                  * the processing is assumed to be done.
 413                  *
 414                  * So set the base_ptr to the given address, use this arg as the
 415                  * load address and set bzimage_addr to 0 so we know that it
 416                  * cannot be proceesed (or processed again).
 417                  */
 418                 state.base_ptr = (void *)simple_strtoul(argv[5], NULL, 16);
 419                 state.load_address = state.bzimage_addr;
 420                 state.bzimage_addr = 0;
 421         }
 422         if (argc >= 7)
 423                 state.cmdline = env_get(argv[6]);
 424
 425         return 0;
 426 }
 427
 428 static int do_zboot_load(struct cmd_tbl *cmdtp, int flag, int argc,
 429                          char *const argv[])
 430 {
 431         struct boot_params *base_ptr;
 432
 433         if (state.base_ptr) {
 434                 struct boot_params *from = (struct boot_params *)state.base_ptr;
 435
 436                 base_ptr = (struct boot_params *)DEFAULT_SETUP_BASE;
 437                 log_debug("Building boot_params at 0x%8.8lx\n",
 438                           (ulong)base_ptr);
 439                 memset(base_ptr, '\0', sizeof(*base_ptr));
 440                 base_ptr->hdr = from->hdr;
 441         } else {
 442                 base_ptr = load_zimage((void *)state.bzimage_addr, state.bzimage_size,
 443                                        &state.load_address);
 444                 if (!base_ptr) {
 445                         puts("## Kernel loading failed ...\n");
 446                         return CMD_RET_FAILURE;
 447                 }
 448         }
 449         state.base_ptr = base_ptr;
 450         if (env_set_hex("zbootbase", (ulong)base_ptr) ||
 451             env_set_hex("zbootaddr", state.load_address))
 452                 return CMD_RET_FAILURE;
 453
 454         return 0;
 455 }
 456
 457 static int do_zboot_setup(struct cmd_tbl *cmdtp, int flag, int argc,
 458                           char *const argv[])
 459 {
 460         struct boot_params *base_ptr = state.base_ptr;
 461         int ret;
 462
 463         if (!base_ptr) {
 464                 printf("base is not set: use 'zboot load' first\n");
 465                 return CMD_RET_FAILURE;
 466         }
 467         ret = setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
 468                            0, state.initrd_addr, state.initrd_size,
 469                            (ulong)state.cmdline);
 470         if (ret) {
 471                 puts("Setting up boot parameters failed ...\n");
 472                 return CMD_RET_FAILURE;
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int do_zboot_info(struct cmd_tbl *cmdtp, int flag, int argc,
 479                          char *const argv[])
 480 {
 481         printf("Kernel loaded at %08lx, setup_base=%p\n",
 482                state.load_address, state.base_ptr);
 483
 484         return 0;
 485 }
 486
 487 static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
 488                        char *const argv[])
 489 {
 490         int ret;
 491
 492         disable_interrupts();
 493
 494         /* we assume that the kernel is in place */
 495         ret = boot_linux_kernel((ulong)state.base_ptr, state.load_address,
 496                                 false);
 497         printf("Kernel returned! (err=%d)\n", ret);
 498
 499         return CMD_RET_FAILURE;
 500 }
 501
 502 static void print_num(const char *name, ulong value)
 503 {
 504         printf("%-20s: %lx\n", name, value);
 505 }
 506
 507 static void print_num64(const char *name, u64 value)
 508 {
 509         printf("%-20s: %llx\n", name, value);
 510 }
 511
 512 static const char *const e820_type_name[E820_COUNT] = {
 513         [E820_RAM] = "RAM",
 514         [E820_RESERVED] = "Reserved",
 515         [E820_ACPI] = "ACPI",
 516         [E820_NVS] = "ACPI NVS",
 517         [E820_UNUSABLE] = "Unusable",
 518 };
 519
 520 static const char *const bootloader_id[] = {
 521         "LILO",
 522         "Loadlin",
 523         "bootsect-loader",
 524         "Syslinux",
 525         "Etherboot/gPXE/iPXE",
 526         "ELILO",
 527         "undefined",
 528         "GRUB",
 529         "U-Boot",
 530         "Xen",
 531         "Gujin",
 532         "Qemu",
 533         "Arcturus Networks uCbootloader",
 534         "kexec-tools",
 535         "Extended",
 536         "Special",
 537         "Reserved",
 538         "Minimal Linux Bootloader",
 539         "OVMF UEFI virtualization stack",
 540 };
 541
 542 struct flag_info {
 543         uint bit;
 544         const char *name;
 545 };
 546
 547 static struct flag_info load_flags[] = {
 548         { LOADED_HIGH, "loaded-high" },
 549         { QUIET_FLAG, "quiet" },
 550         { KEEP_SEGMENTS, "keep-segments" },
 551         { CAN_USE_HEAP, "can-use-heap" },
 552 };
 553
 554 static struct flag_info xload_flags[] = {
 555         { XLF_KERNEL_64, "64-bit-entry" },
 556         { XLF_CAN_BE_LOADED_ABOVE_4G, "can-load-above-4gb" },
 557         { XLF_EFI_HANDOVER_32, "32-efi-handoff" },
 558         { XLF_EFI_HANDOVER_64, "64-efi-handoff" },
 559         { XLF_EFI_KEXEC, "kexec-efi-runtime" },
 560 };
 561
 562 static void print_flags(struct flag_info *flags, int count, uint value)
 563 {
 564         int i;
 565
 566         printf("%-20s:", "");
 567         for (i = 0; i < count; i++) {
 568                 uint mask = flags[i].bit;
 569
 570                 if (value & mask)
 571                         printf(" %s", flags[i].name);
 572         }
 573         printf("\n");
 574 }
 575
 576 static void show_loader(struct setup_header *hdr)
 577 {
 578         bool version_valid = false;
 579         int type, version;
 580         const char *name;
 581
 582         type = hdr->type_of_loader >> 4;
 583         version = hdr->type_of_loader & 0xf;
 584         if (type == 0xe)
 585                 type = 0x10 + hdr->ext_loader_type;
 586         version |= hdr->ext_loader_ver << 4;
 587         if (!hdr->type_of_loader) {
 588                 name = "pre-2.00 bootloader";
 589         } else if (hdr->type_of_loader == 0xff) {
 590                 name = "unknown";
 591         } else if (type < ARRAY_SIZE(bootloader_id)) {
 592                 name = bootloader_id[type];
 593                 version_valid = true;
 594         } else {
 595                 name = "undefined";
 596         }
 597         printf("%20s  %s", "", name);
 598         if (version_valid)
 599                 printf(", version %x", version);
 600         printf("\n");
 601 }
 602
 603 int do_zboot_dump(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 604 {
 605         struct boot_params *base_ptr = state.base_ptr;
 606         struct setup_header *hdr;
 607         const char *version;
 608         int i;
 609
 610         if (argc > 1)
 611                 base_ptr = (void *)simple_strtoul(argv[1], NULL, 16);
 612         if (!base_ptr) {
 613                 printf("No zboot setup_base\n");
 614                 return CMD_RET_FAILURE;
 615         }
 616         printf("Setup located at %p:\n\n", base_ptr);
 617         print_num64("ACPI RSDP addr", base_ptr->acpi_rsdp_addr);
 618
 619         printf("E820: %d entries\n", base_ptr->e820_entries);
 620         if (base_ptr->e820_entries) {
 621                 printf("%18s  %16s  %s\n", "Addr", "Size", "Type");
 622                 for (i = 0; i < base_ptr->e820_entries; i++) {
 623                         struct e820_entry *entry = &base_ptr->e820_map[i];
 624
 625                         printf("%12llx  %10llx  %s\n", entry->addr, entry->size,
 626                                entry->type < E820_COUNT ?
 627                                e820_type_name[entry->type] :
 628                                simple_itoa(entry->type));
 629                 }
 630         }
 631
 632         hdr = &base_ptr->hdr;
 633         print_num("Setup sectors", hdr->setup_sects);
 634         print_num("Root flags", hdr->root_flags);
 635         print_num("Sys size", hdr->syssize);
 636         print_num("RAM size", hdr->ram_size);
 637         print_num("Video mode", hdr->vid_mode);
 638         print_num("Root dev", hdr->root_dev);
 639         print_num("Boot flag", hdr->boot_flag);
 640         print_num("Jump", hdr->jump);
 641         print_num("Header", hdr->header);
 642         if (hdr->header == KERNEL_V2_MAGIC)
 643                 printf("%-20s  %s\n", "", "Kernel V2");
 644         else
 645                 printf("%-20s  %s\n", "", "Ancient kernel, using version 100");
 646         print_num("Version", hdr->version);
 647         print_num("Real mode switch", hdr->realmode_swtch);
 648         print_num("Start sys", hdr->start_sys);
 649         print_num("Kernel version", hdr->kernel_version);
 650         version = get_kernel_version(base_ptr, (void *)state.bzimage_addr);
 651         if (version)
 652                 printf("   @%p: %s\n", version, version);
 653         print_num("Type of loader", hdr->type_of_loader);
 654         show_loader(hdr);
 655         print_num("Load flags", hdr->loadflags);
 656         print_flags(load_flags, ARRAY_SIZE(load_flags), hdr->loadflags);
 657         print_num("Setup move size", hdr->setup_move_size);
 658         print_num("Code32 start", hdr->code32_start);
 659         print_num("Ramdisk image", hdr->ramdisk_image);
 660         print_num("Ramdisk size", hdr->ramdisk_size);
 661         print_num("Bootsect kludge", hdr->bootsect_kludge);
 662         print_num("Heap end ptr", hdr->heap_end_ptr);
 663         print_num("Ext loader ver", hdr->ext_loader_ver);
 664         print_num("Ext loader type", hdr->ext_loader_type);
 665         print_num("Command line ptr", hdr->cmd_line_ptr);
 666         if (hdr->cmd_line_ptr) {
 667                 printf("   ");
 668                 /* Use puts() to avoid limits from CONFIG_SYS_PBSIZE */
 669                 puts((char *)(ulong)hdr->cmd_line_ptr);
 670                 printf("\n");
 671         }
 672         print_num("Initrd addr max", hdr->initrd_addr_max);
 673         print_num("Kernel alignment", hdr->kernel_alignment);
 674         print_num("Relocatable kernel", hdr->relocatable_kernel);
 675         print_num("Min alignment", hdr->min_alignment);
 676         if (hdr->min_alignment)
 677                 printf("%-20s: %x\n", "", 1 << hdr->min_alignment);
 678         print_num("Xload flags", hdr->xloadflags);
 679         print_flags(xload_flags, ARRAY_SIZE(xload_flags), hdr->xloadflags);
 680         print_num("Cmdline size", hdr->cmdline_size);
 681         print_num("Hardware subarch", hdr->hardware_subarch);
 682         print_num64("HW subarch data", hdr->hardware_subarch_data);
 683         print_num("Payload offset", hdr->payload_offset);
 684         print_num("Payload length", hdr->payload_length);
 685         print_num64("Setup data", hdr->setup_data);
 686         print_num64("Pref address", hdr->pref_address);
 687         print_num("Init size", hdr->init_size);
 688         print_num("Handover offset", hdr->handover_offset);
 689         if (get_boot_protocol(hdr, false) >= 0x215)
 690                 print_num("Kernel info offset", hdr->kernel_info_offset);
 691
 692         return 0;
 693 }
 694
 695 /* Note: This defines the complete_zboot() function */
 696 U_BOOT_SUBCMDS(zboot,
 697         U_BOOT_CMD_MKENT(start, 8, 1, do_zboot_start, "", ""),
 698         U_BOOT_CMD_MKENT(load, 1, 1, do_zboot_load, "", ""),
 699         U_BOOT_CMD_MKENT(setup, 1, 1, do_zboot_setup, "", ""),
 700         U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""),
 701         U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
 702         U_BOOT_CMD_MKENT(dump, 2, 1, do_zboot_dump, "", ""),
 703 )
 704
 705 int do_zboot_states(struct cmd_tbl *cmdtp, int flag, int argc,
 706                     char *const argv[], int state_mask)
 707 {
 708         int i;
 709
 710         for (i = 0; i < ZBOOT_STATE_COUNT; i++) {
 711                 struct cmd_tbl *cmd = &zboot_subcmds[i];
 712                 int mask = 1 << i;
 713                 int ret;
 714
 715                 if (mask & state_mask) {
 716                         ret = cmd->cmd(cmd, flag, argc, argv);
 717                         if (ret)
 718                                 return ret;
 719                 }
 720         }
 721
 722         return 0;
 723 }
 724
 725 int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
 726                     char *const argv[], int *repeatable)
 727 {
 728         /* determine if we have a sub command */
 729         if (argc > 1) {
 730                 char *endp;
 731
 732                 simple_strtoul(argv[1], &endp, 16);
 733                 /*
 734                  * endp pointing to nul means that argv[1] was just a valid
 735                  * number, so pass it along to the normal processing
 736                  */
 737                 if (*endp)
 738                         return do_zboot(cmdtp, flag, argc, argv, repeatable);
 739         }
 740
 741         do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
 742                         ZBOOT_STATE_LOAD | ZBOOT_STATE_SETUP |
 743                         ZBOOT_STATE_INFO | ZBOOT_STATE_GO);
 744
 745         return CMD_RET_FAILURE;
 746 }
 747
 748 U_BOOT_CMDREP_COMPLETE(
 749         zboot, 8, do_zboot_parent, "Boot bzImage",
 750         "[addr] [size] [initrd addr] [initrd size] [setup] [cmdline]\n"
 751         "      addr -        The optional starting address of the bzimage.\n"
 752         "                    If not set it defaults to the environment\n"
 753         "                    variable \"fileaddr\".\n"
 754         "      size -        The optional size of the bzimage. Defaults to\n"
 755         "                    zero.\n"
 756         "      initrd addr - The address of the initrd image to use, if any.\n"
 757         "      initrd size - The size of the initrd image to use, if any.\n"
 758         "      setup -       The address of the kernel setup region, if this\n"
 759         "                    is not at addr\n"
 760         "      cmdline -     Environment variable containing the kernel\n"
 761         "                    command line, to override U-Boot's normal\n"
 762         "                    cmdline generation\n"
 763         "\n"
 764         "Sub-commands to do part of the zboot sequence:\n"
 765         "\tstart [addr [arg ...]] - specify arguments\n"
 766         "\tload   - load OS image\n"
 767         "\tsetup  - set up table\n"
 768         "\tinfo   - show summary info\n"
 769         "\tgo     - start OS\n"
 770         "\tdump [addr]    - dump info (optional address of boot params)",
 771         complete_zboot
 772 );