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 <init.h>
  22 #include <irq_func.h>
  23 #include <log.h>
  24 #include <malloc.h>
  25 #include <mapmem.h>
  26 #include <acpi/acpi_table.h>
  27 #include <asm/io.h>
  28 #include <asm/ptrace.h>
  29 #include <asm/zimage.h>
  30 #include <asm/byteorder.h>
  31 #include <asm/bootm.h>
  32 #include <asm/bootparam.h>
  33 #include <asm/efi.h>
  34 #include <asm/global_data.h>
  35 #ifdef CONFIG_SYS_COREBOOT
  36 #include <asm/arch/timestamp.h>
  37 #endif
  38 #include <linux/compiler.h>
  39 #include <linux/ctype.h>
  40 #include <linux/libfdt.h>
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 /*
  45  * Memory lay-out:
  46  *
  47  * relative to setup_base (which is 0x90000 currently)
  48  *
  49  *      0x0000-0x7FFF   Real mode kernel
  50  *      0x8000-0x8FFF   Stack and heap
  51  *      0x9000-0x90FF   Kernel command line
  52  */
  53 #define DEFAULT_SETUP_BASE      0x90000
  54 #define COMMAND_LINE_OFFSET     0x9000
  55 #define HEAP_END_OFFSET         0x8e00
  56
  57 #define COMMAND_LINE_SIZE       2048
  58
  59 /**
  60  * struct zboot_state - Current state of the boot
  61  *
  62  * @bzimage_addr: Address of the bzImage to boot
  63  * @bzimage_size: Size of the bzImage, or 0 to detect this
  64  * @initrd_addr: Address of the initial ramdisk, or 0 if none
  65  * @initrd_size: Size of the initial ramdisk, or 0 if none
  66  * @load_address: Address where the bzImage is moved before booting, either
  67  *      BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
  68  * @base_ptr: Pointer to the boot parameters, typically at address
  69  *      DEFAULT_SETUP_BASE
  70  * @cmdline: Environment variable containing the 'override' command line, or
  71  *      NULL to use the one in the setup block
  72  */
  73 struct zboot_state {
  74         ulong bzimage_addr;
  75         ulong bzimage_size;
  76         ulong initrd_addr;
  77         ulong initrd_size;
  78         ulong load_address;
  79         struct boot_params *base_ptr;
  80         char *cmdline;
  81 } state;
  82
  83 enum {
  84         ZBOOT_STATE_START       = BIT(0),
  85         ZBOOT_STATE_LOAD        = BIT(1),
  86         ZBOOT_STATE_SETUP       = BIT(2),
  87         ZBOOT_STATE_INFO        = BIT(3),
  88         ZBOOT_STATE_GO          = BIT(4),
  89
  90         /* This one doesn't execute automatically, so stop the count before 5 */
  91         ZBOOT_STATE_DUMP        = BIT(5),
  92         ZBOOT_STATE_COUNT       = 5,
  93 };
  94
  95 static void build_command_line(char *command_line, int auto_boot)
  96 {
  97         char *env_command_line;
  98
  99         command_line[0] = '\0';
 100
 101         env_command_line =  env_get("bootargs");
 102
 103         /* set console= argument if we use a serial console */
 104         if (!strstr(env_command_line, "console=")) {
 105                 if (!strcmp(env_get("stdout"), "serial")) {
 106
 107                         /* We seem to use serial console */
 108                         sprintf(command_line, "console=ttyS0,%s ",
 109                                 env_get("baudrate"));
 110                 }
 111         }
 112
 113         if (auto_boot)
 114                 strcat(command_line, "auto ");
 115
 116         if (env_command_line)
 117                 strcat(command_line, env_command_line);
 118 #ifdef DEBUG
 119         printf("Kernel command line:");
 120         puts(command_line);
 121         printf("\n");
 122 #endif
 123 }
 124
 125 static int kernel_magic_ok(struct setup_header *hdr)
 126 {
 127         if (KERNEL_MAGIC != hdr->boot_flag) {
 128                 printf("Error: Invalid Boot Flag "
 129                         "(found 0x%04x, expected 0x%04x)\n",
 130                         hdr->boot_flag, KERNEL_MAGIC);
 131                 return 0;
 132         } else {
 133                 printf("Valid Boot Flag\n");
 134                 return 1;
 135         }
 136 }
 137
 138 static int get_boot_protocol(struct setup_header *hdr, bool verbose)
 139 {
 140         if (hdr->header == KERNEL_V2_MAGIC) {
 141                 if (verbose)
 142                         printf("Magic signature found\n");
 143                 return hdr->version;
 144         } else {
 145                 /* Very old kernel */
 146                 if (verbose)
 147                         printf("Magic signature not found\n");
 148                 return 0x0100;
 149         }
 150 }
 151
 152 static int setup_device_tree(struct setup_header *hdr, const void *fdt_blob)
 153 {
 154         int bootproto = get_boot_protocol(hdr, false);
 155         struct setup_data *sd;
 156         int size;
 157
 158         if (bootproto < 0x0209)
 159                 return -ENOTSUPP;
 160
 161         if (!fdt_blob)
 162                 return 0;
 163
 164         size = fdt_totalsize(fdt_blob);
 165         if (size < 0)
 166                 return -EINVAL;
 167
 168         size += sizeof(struct setup_data);
 169         sd = (struct setup_data *)malloc(size);
 170         if (!sd) {
 171                 printf("Not enough memory for DTB setup data\n");
 172                 return -ENOMEM;
 173         }
 174
 175         sd->next = hdr->setup_data;
 176         sd->type = SETUP_DTB;
 177         sd->len = fdt_totalsize(fdt_blob);
 178         memcpy(sd->data, fdt_blob, sd->len);
 179         hdr->setup_data = (unsigned long)sd;
 180
 181         return 0;
 182 }
 183
 184 const char *zimage_get_kernel_version(struct boot_params *params,
 185                                       void *kernel_base)
 186 {
 187         struct setup_header *hdr = &params->hdr;
 188         int bootproto;
 189         const char *s, *end;
 190
 191         bootproto = get_boot_protocol(hdr, false);
 192         log_debug("bootproto %x, hdr->setup_sects %x\n", bootproto,
 193                   hdr->setup_sects);
 194         if (bootproto < 0x0200 || hdr->setup_sects < 15)
 195                 return NULL;
 196
 197         /* sanity-check the kernel version in case it is missing */
 198         log_debug("hdr->kernel_version %x, str at %p\n", hdr->kernel_version,
 199                   kernel_base + hdr->kernel_version + 0x200);
 200         for (s = kernel_base + hdr->kernel_version + 0x200, end = s + 0x100; *s;
 201              s++) {
 202                 if (!isprint(*s))
 203                         return NULL;
 204         }
 205
 206         return kernel_base + hdr->kernel_version + 0x200;
 207 }
 208
 209 struct boot_params *load_zimage(char *image, unsigned long kernel_size,
 210                                 ulong *load_addressp)
 211 {
 212         struct boot_params *setup_base;
 213         const char *version;
 214         int setup_size;
 215         int bootproto;
 216         int big_image;
 217
 218         struct boot_params *params = (struct boot_params *)image;
 219         struct setup_header *hdr = &params->hdr;
 220
 221         /* base address for real-mode segment */
 222         setup_base = (struct boot_params *)DEFAULT_SETUP_BASE;
 223
 224         if (!kernel_magic_ok(hdr))
 225                 return 0;
 226
 227         /* determine size of setup */
 228         if (0 == hdr->setup_sects) {
 229                 log_warning("Setup Sectors = 0 (defaulting to 4)\n");
 230                 setup_size = 5 * 512;
 231         } else {
 232                 setup_size = (hdr->setup_sects + 1) * 512;
 233         }
 234
 235         log_debug("Setup Size = 0x%8.8lx\n", (ulong)setup_size);
 236
 237         if (setup_size > SETUP_MAX_SIZE)
 238                 printf("Error: Setup is too large (%d bytes)\n", setup_size);
 239
 240         /* determine boot protocol version */
 241         bootproto = get_boot_protocol(hdr, true);
 242
 243         log_debug("Using boot protocol version %x.%02x\n",
 244                   (bootproto & 0xff00) >> 8, bootproto & 0xff);
 245
 246         version = zimage_get_kernel_version(params, image);
 247         if (version)
 248                 printf("Linux kernel version %s\n", version);
 249         else
 250                 printf("Setup Sectors < 15 - Cannot print kernel version\n");
 251
 252         /* Determine image type */
 253         big_image = (bootproto >= 0x0200) &&
 254                     (hdr->loadflags & BIG_KERNEL_FLAG);
 255
 256         /* Determine load address */
 257         if (big_image)
 258                 *load_addressp = BZIMAGE_LOAD_ADDR;
 259         else
 260                 *load_addressp = ZIMAGE_LOAD_ADDR;
 261
 262         printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
 263         memset(setup_base, 0, sizeof(*setup_base));
 264         setup_base->hdr = params->hdr;
 265
 266         if (bootproto >= 0x0204)
 267                 kernel_size = hdr->syssize * 16;
 268         else
 269                 kernel_size -= setup_size;
 270
 271         if (bootproto == 0x0100) {
 272                 /*
 273                  * A very old kernel MUST have its real-mode code
 274                  * loaded at 0x90000
 275                  */
 276                 if ((ulong)setup_base != 0x90000) {
 277                         /* Copy the real-mode kernel */
 278                         memmove((void *)0x90000, setup_base, setup_size);
 279
 280                         /* Copy the command line */
 281                         memmove((void *)0x99000,
 282                                 (u8 *)setup_base + COMMAND_LINE_OFFSET,
 283                                 COMMAND_LINE_SIZE);
 284
 285                          /* Relocated */
 286                         setup_base = (struct boot_params *)0x90000;
 287                 }
 288
 289                 /* It is recommended to clear memory up to the 32K mark */
 290                 memset((u8 *)0x90000 + setup_size, 0,
 291                        SETUP_MAX_SIZE - setup_size);
 292         }
 293
 294         if (big_image) {
 295                 if (kernel_size > BZIMAGE_MAX_SIZE) {
 296                         printf("Error: bzImage kernel too big! "
 297                                 "(size: %ld, max: %d)\n",
 298                                 kernel_size, BZIMAGE_MAX_SIZE);
 299                         return 0;
 300                 }
 301         } else if ((kernel_size) > ZIMAGE_MAX_SIZE) {
 302                 printf("Error: zImage kernel too big! (size: %ld, max: %d)\n",
 303                        kernel_size, ZIMAGE_MAX_SIZE);
 304                 return 0;
 305         }
 306
 307         printf("Loading %s at address %lx (%ld bytes)\n",
 308                big_image ? "bzImage" : "zImage", *load_addressp, kernel_size);
 309
 310         memmove((void *)*load_addressp, image + setup_size, kernel_size);
 311
 312         return setup_base;
 313 }
 314
 315 int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
 316                  ulong initrd_addr, ulong initrd_size, ulong cmdline_force)
 317 {
 318         struct setup_header *hdr = &setup_base->hdr;
 319         int bootproto = get_boot_protocol(hdr, false);
 320
 321         log_debug("Setup E820 entries\n");
 322         if (IS_ENABLED(CONFIG_COREBOOT_SYSINFO)) {
 323                 setup_base->e820_entries = cb_install_e820_map(
 324                         ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
 325         } else {
 326                 setup_base->e820_entries = install_e820_map(
 327                         ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
 328         }
 329
 330         if (bootproto == 0x0100) {
 331                 setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
 332                 setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
 333         }
 334         if (bootproto >= 0x0200) {
 335                 hdr->type_of_loader = 0x80;     /* U-Boot version 0 */
 336                 if (initrd_addr) {
 337                         printf("Initial RAM disk at linear address "
 338                                "0x%08lx, size %ld bytes\n",
 339                                initrd_addr, initrd_size);
 340
 341                         hdr->ramdisk_image = initrd_addr;
 342                         hdr->ramdisk_size = initrd_size;
 343                 }
 344         }
 345
 346         if (bootproto >= 0x0201) {
 347                 hdr->heap_end_ptr = HEAP_END_OFFSET;
 348                 hdr->loadflags |= HEAP_FLAG;
 349         }
 350
 351         if (cmd_line) {
 352                 int max_size = 0xff;
 353                 int ret;
 354
 355                 log_debug("Setup cmdline\n");
 356                 if (bootproto >= 0x0206)
 357                         max_size = hdr->cmdline_size;
 358                 if (bootproto >= 0x0202) {
 359                         hdr->cmd_line_ptr = (uintptr_t)cmd_line;
 360                 } else if (bootproto >= 0x0200) {
 361                         setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
 362                         setup_base->screen_info.cl_offset =
 363                                 (uintptr_t)cmd_line - (uintptr_t)setup_base;
 364
 365                         hdr->setup_move_size = 0x9100;
 366                 }
 367
 368                 /* build command line at COMMAND_LINE_OFFSET */
 369                 if (cmdline_force)
 370                         strcpy(cmd_line, (char *)cmdline_force);
 371                 else
 372                         build_command_line(cmd_line, auto_boot);
 373                 if (IS_ENABLED(CONFIG_CMD_BOOTM)) {
 374                         ret = bootm_process_cmdline(cmd_line, max_size,
 375                                                     BOOTM_CL_ALL);
 376                         if (ret) {
 377                                 printf("Cmdline setup failed (max_size=%x, bootproto=%x, err=%d)\n",
 378                                        max_size, bootproto, ret);
 379                                 return ret;
 380                         }
 381                 }
 382                 printf("Kernel command line: \"");
 383                 puts(cmd_line);
 384                 printf("\"\n");
 385         }
 386
 387         if (IS_ENABLED(CONFIG_INTEL_MID) && bootproto >= 0x0207)
 388                 hdr->hardware_subarch = X86_SUBARCH_INTEL_MID;
 389
 390         if (IS_ENABLED(CONFIG_GENERATE_ACPI_TABLE))
 391                 setup_base->acpi_rsdp_addr = acpi_get_rsdp_addr();
 392
 393         log_debug("Setup devicetree\n");
 394         setup_device_tree(hdr, (const void *)env_get_hex("fdtaddr", 0));
 395         setup_video(&setup_base->screen_info);
 396
 397         if (IS_ENABLED(CONFIG_EFI_STUB))
 398                 setup_efi_info(&setup_base->efi_info);
 399
 400         return 0;
 401 }
 402
 403 static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
 404                           char *const argv[])
 405 {
 406         const char *s;
 407
 408         memset(&state, '\0', sizeof(state));
 409         if (argc >= 2) {
 410                 /* argv[1] holds the address of the bzImage */
 411                 s = argv[1];
 412         } else {
 413                 s = env_get("fileaddr");
 414         }
 415
 416         if (s)
 417                 state.bzimage_addr = hextoul(s, NULL);
 418
 419         if (argc >= 3) {
 420                 /* argv[2] holds the size of the bzImage */
 421                 state.bzimage_size = hextoul(argv[2], NULL);
 422         }
 423
 424         if (argc >= 4)
 425                 state.initrd_addr = hextoul(argv[3], NULL);
 426         if (argc >= 5)
 427                 state.initrd_size = hextoul(argv[4], NULL);
 428         if (argc >= 6) {
 429                 /*
 430                  * When the base_ptr is passed in, we assume that the image is
 431                  * already loaded at the address given by argv[1] and therefore
 432                  * the original bzImage is somewhere else, or not accessible.
 433                  * In any case, we don't need access to the bzImage since all
 434                  * the processing is assumed to be done.
 435                  *
 436                  * So set the base_ptr to the given address, use this arg as the
 437                  * load address and set bzimage_addr to 0 so we know that it
 438                  * cannot be proceesed (or processed again).
 439                  */
 440                 state.base_ptr = (void *)hextoul(argv[5], NULL);
 441                 state.load_address = state.bzimage_addr;
 442                 state.bzimage_addr = 0;
 443         }
 444         if (argc >= 7)
 445                 state.cmdline = env_get(argv[6]);
 446
 447         return 0;
 448 }
 449
 450 static int zboot_load(void)
 451 {
 452         struct boot_params *base_ptr;
 453
 454         if (state.base_ptr) {
 455                 struct boot_params *from = (struct boot_params *)state.base_ptr;
 456
 457                 base_ptr = (struct boot_params *)DEFAULT_SETUP_BASE;
 458                 log_debug("Building boot_params at 0x%8.8lx\n",
 459                           (ulong)base_ptr);
 460                 memset(base_ptr, '\0', sizeof(*base_ptr));
 461                 base_ptr->hdr = from->hdr;
 462         } else {
 463                 base_ptr = load_zimage((void *)state.bzimage_addr, state.bzimage_size,
 464                                        &state.load_address);
 465                 if (!base_ptr) {
 466                         puts("## Kernel loading failed ...\n");
 467                         return -EINVAL;
 468                 }
 469         }
 470         state.base_ptr = base_ptr;
 471
 472         return 0;
 473 }
 474
 475 static int do_zboot_load(struct cmd_tbl *cmdtp, int flag, int argc,
 476                          char *const argv[])
 477 {
 478         if (zboot_load())
 479                 return CMD_RET_FAILURE;
 480
 481         if (env_set_hex("zbootbase", map_to_sysmem(state.base_ptr)) ||
 482             env_set_hex("zbootaddr", state.load_address))
 483                 return CMD_RET_FAILURE;
 484
 485         return 0;
 486 }
 487
 488 static int zboot_setup(void)
 489 {
 490         struct boot_params *base_ptr = state.base_ptr;
 491         int ret;
 492
 493         ret = setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
 494                            0, state.initrd_addr, state.initrd_size,
 495                            (ulong)state.cmdline);
 496         if (ret)
 497                 return -EINVAL;
 498
 499         return 0;
 500 }
 501
 502 static int do_zboot_setup(struct cmd_tbl *cmdtp, int flag, int argc,
 503                           char *const argv[])
 504 {
 505         struct boot_params *base_ptr = state.base_ptr;
 506
 507         if (!base_ptr) {
 508                 printf("base is not set: use 'zboot load' first\n");
 509                 return CMD_RET_FAILURE;
 510         }
 511         if (zboot_setup()) {
 512                 puts("Setting up boot parameters failed ...\n");
 513                 return CMD_RET_FAILURE;
 514         }
 515
 516         return 0;
 517 }
 518
 519 static int do_zboot_info(struct cmd_tbl *cmdtp, int flag, int argc,
 520                          char *const argv[])
 521 {
 522         printf("Kernel loaded at %08lx, setup_base=%p\n",
 523                state.load_address, state.base_ptr);
 524
 525         return 0;
 526 }
 527
 528 static int zboot_go(void)
 529 {
 530         struct boot_params *params = state.base_ptr;
 531         struct setup_header *hdr = &params->hdr;
 532         bool image_64bit;
 533         ulong entry;
 534         int ret;
 535
 536         disable_interrupts();
 537
 538         entry = state.load_address;
 539         image_64bit = false;
 540         if (IS_ENABLED(CONFIG_X86_RUN_64BIT) &&
 541             (hdr->xloadflags & XLF_KERNEL_64)) {
 542                 entry += 0x200;
 543                 image_64bit = true;
 544         }
 545
 546         /* we assume that the kernel is in place */
 547         ret = boot_linux_kernel((ulong)state.base_ptr, entry, image_64bit);
 548
 549         return ret;
 550 }
 551
 552 static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
 553                        char *const argv[])
 554 {
 555         int ret;
 556
 557         ret = zboot_go();
 558         printf("Kernel returned! (err=%d)\n", ret);
 559
 560         return CMD_RET_FAILURE;
 561 }
 562
 563 int zboot_start(ulong addr, ulong size, ulong initrd, ulong initrd_size,
 564                 ulong base, char *cmdline)
 565 {
 566         int ret;
 567
 568         memset(&state, '\0', sizeof(state));
 569
 570         if (base) {
 571                 state.base_ptr = map_sysmem(base, 0);
 572                 state.load_address = addr;
 573         } else {
 574                 state.bzimage_addr = addr;
 575         }
 576         state.bzimage_size = size;
 577         state.initrd_addr = initrd;
 578         state.initrd_size = initrd_size;
 579         state.cmdline = cmdline;
 580
 581         ret = zboot_load();
 582         if (ret)
 583                 return log_msg_ret("ld", ret);
 584         ret = zboot_setup();
 585         if (ret)
 586                 return log_msg_ret("set", ret);
 587         ret = zboot_go();
 588         if (ret)
 589                 return log_msg_ret("set", ret);
 590
 591         return -EFAULT;
 592 }
 593
 594 static void print_num(const char *name, ulong value)
 595 {
 596         printf("%-20s: %lx\n", name, value);
 597 }
 598
 599 static void print_num64(const char *name, u64 value)
 600 {
 601         printf("%-20s: %llx\n", name, value);
 602 }
 603
 604 static const char *const e820_type_name[E820_COUNT] = {
 605         [E820_RAM] = "RAM",
 606         [E820_RESERVED] = "Reserved",
 607         [E820_ACPI] = "ACPI",
 608         [E820_NVS] = "ACPI NVS",
 609         [E820_UNUSABLE] = "Unusable",
 610 };
 611
 612 static const char *const bootloader_id[] = {
 613         "LILO",
 614         "Loadlin",
 615         "bootsect-loader",
 616         "Syslinux",
 617         "Etherboot/gPXE/iPXE",
 618         "ELILO",
 619         "undefined",
 620         "GRUB",
 621         "U-Boot",
 622         "Xen",
 623         "Gujin",
 624         "Qemu",
 625         "Arcturus Networks uCbootloader",
 626         "kexec-tools",
 627         "Extended",
 628         "Special",
 629         "Reserved",
 630         "Minimal Linux Bootloader",
 631         "OVMF UEFI virtualization stack",
 632 };
 633
 634 struct flag_info {
 635         uint bit;
 636         const char *name;
 637 };
 638
 639 static struct flag_info load_flags[] = {
 640         { LOADED_HIGH, "loaded-high" },
 641         { QUIET_FLAG, "quiet" },
 642         { KEEP_SEGMENTS, "keep-segments" },
 643         { CAN_USE_HEAP, "can-use-heap" },
 644 };
 645
 646 static struct flag_info xload_flags[] = {
 647         { XLF_KERNEL_64, "64-bit-entry" },
 648         { XLF_CAN_BE_LOADED_ABOVE_4G, "can-load-above-4gb" },
 649         { XLF_EFI_HANDOVER_32, "32-efi-handoff" },
 650         { XLF_EFI_HANDOVER_64, "64-efi-handoff" },
 651         { XLF_EFI_KEXEC, "kexec-efi-runtime" },
 652 };
 653
 654 static void print_flags(struct flag_info *flags, int count, uint value)
 655 {
 656         int i;
 657
 658         printf("%-20s:", "");
 659         for (i = 0; i < count; i++) {
 660                 uint mask = flags[i].bit;
 661
 662                 if (value & mask)
 663                         printf(" %s", flags[i].name);
 664         }
 665         printf("\n");
 666 }
 667
 668 static void show_loader(struct setup_header *hdr)
 669 {
 670         bool version_valid = false;
 671         int type, version;
 672         const char *name;
 673
 674         type = hdr->type_of_loader >> 4;
 675         version = hdr->type_of_loader & 0xf;
 676         if (type == 0xe)
 677                 type = 0x10 + hdr->ext_loader_type;
 678         version |= hdr->ext_loader_ver << 4;
 679         if (!hdr->type_of_loader) {
 680                 name = "pre-2.00 bootloader";
 681         } else if (hdr->type_of_loader == 0xff) {
 682                 name = "unknown";
 683         } else if (type < ARRAY_SIZE(bootloader_id)) {
 684                 name = bootloader_id[type];
 685                 version_valid = true;
 686         } else {
 687                 name = "undefined";
 688         }
 689         printf("%20s  %s", "", name);
 690         if (version_valid)
 691                 printf(", version %x", version);
 692         printf("\n");
 693 }
 694
 695 void zimage_dump(struct boot_params *base_ptr)
 696 {
 697         struct setup_header *hdr;
 698         const char *version;
 699         int i;
 700
 701         printf("Setup located at %p:\n\n", base_ptr);
 702         print_num64("ACPI RSDP addr", base_ptr->acpi_rsdp_addr);
 703
 704         printf("E820: %d entries\n", base_ptr->e820_entries);
 705         if (base_ptr->e820_entries) {
 706                 printf("%18s  %16s  %s\n", "Addr", "Size", "Type");
 707                 for (i = 0; i < base_ptr->e820_entries; i++) {
 708                         struct e820_entry *entry = &base_ptr->e820_map[i];
 709
 710                         printf("%12llx  %10llx  %s\n", entry->addr, entry->size,
 711                                entry->type < E820_COUNT ?
 712                                e820_type_name[entry->type] :
 713                                simple_itoa(entry->type));
 714                 }
 715         }
 716
 717         hdr = &base_ptr->hdr;
 718         print_num("Setup sectors", hdr->setup_sects);
 719         print_num("Root flags", hdr->root_flags);
 720         print_num("Sys size", hdr->syssize);
 721         print_num("RAM size", hdr->ram_size);
 722         print_num("Video mode", hdr->vid_mode);
 723         print_num("Root dev", hdr->root_dev);
 724         print_num("Boot flag", hdr->boot_flag);
 725         print_num("Jump", hdr->jump);
 726         print_num("Header", hdr->header);
 727         if (hdr->header == KERNEL_V2_MAGIC)
 728                 printf("%-20s  %s\n", "", "Kernel V2");
 729         else
 730                 printf("%-20s  %s\n", "", "Ancient kernel, using version 100");
 731         print_num("Version", hdr->version);
 732         print_num("Real mode switch", hdr->realmode_swtch);
 733         print_num("Start sys seg", hdr->start_sys_seg);
 734         print_num("Kernel version", hdr->kernel_version);
 735         version = zimage_get_kernel_version(base_ptr,
 736                                             (void *)state.bzimage_addr);
 737         if (version)
 738                 printf("   @%p: %s\n", version, version);
 739         print_num("Type of loader", hdr->type_of_loader);
 740         show_loader(hdr);
 741         print_num("Load flags", hdr->loadflags);
 742         print_flags(load_flags, ARRAY_SIZE(load_flags), hdr->loadflags);
 743         print_num("Setup move size", hdr->setup_move_size);
 744         print_num("Code32 start", hdr->code32_start);
 745         print_num("Ramdisk image", hdr->ramdisk_image);
 746         print_num("Ramdisk size", hdr->ramdisk_size);
 747         print_num("Bootsect kludge", hdr->bootsect_kludge);
 748         print_num("Heap end ptr", hdr->heap_end_ptr);
 749         print_num("Ext loader ver", hdr->ext_loader_ver);
 750         print_num("Ext loader type", hdr->ext_loader_type);
 751         print_num("Command line ptr", hdr->cmd_line_ptr);
 752         if (hdr->cmd_line_ptr) {
 753                 printf("   ");
 754                 /* Use puts() to avoid limits from CONFIG_SYS_PBSIZE */
 755                 puts((char *)(ulong)hdr->cmd_line_ptr);
 756                 printf("\n");
 757         }
 758         print_num("Initrd addr max", hdr->initrd_addr_max);
 759         print_num("Kernel alignment", hdr->kernel_alignment);
 760         print_num("Relocatable kernel", hdr->relocatable_kernel);
 761         print_num("Min alignment", hdr->min_alignment);
 762         if (hdr->min_alignment)
 763                 printf("%-20s: %x\n", "", 1 << hdr->min_alignment);
 764         print_num("Xload flags", hdr->xloadflags);
 765         print_flags(xload_flags, ARRAY_SIZE(xload_flags), hdr->xloadflags);
 766         print_num("Cmdline size", hdr->cmdline_size);
 767         print_num("Hardware subarch", hdr->hardware_subarch);
 768         print_num64("HW subarch data", hdr->hardware_subarch_data);
 769         print_num("Payload offset", hdr->payload_offset);
 770         print_num("Payload length", hdr->payload_length);
 771         print_num64("Setup data", hdr->setup_data);
 772         print_num64("Pref address", hdr->pref_address);
 773         print_num("Init size", hdr->init_size);
 774         print_num("Handover offset", hdr->handover_offset);
 775         if (get_boot_protocol(hdr, false) >= 0x215)
 776                 print_num("Kernel info offset", hdr->kernel_info_offset);
 777 }
 778
 779 static int do_zboot_dump(struct cmd_tbl *cmdtp, int flag, int argc,
 780                          char *const argv[])
 781 {
 782         struct boot_params *base_ptr = state.base_ptr;
 783
 784         if (argc > 1)
 785                 base_ptr = (void *)hextoul(argv[1], NULL);
 786         if (!base_ptr) {
 787                 printf("No zboot setup_base\n");
 788                 return CMD_RET_FAILURE;
 789         }
 790         zimage_dump(base_ptr);
 791
 792         return 0;
 793 }
 794
 795 /* Note: This defines the complete_zboot() function */
 796 U_BOOT_SUBCMDS(zboot,
 797         U_BOOT_CMD_MKENT(start, 8, 1, do_zboot_start, "", ""),
 798         U_BOOT_CMD_MKENT(load, 1, 1, do_zboot_load, "", ""),
 799         U_BOOT_CMD_MKENT(setup, 1, 1, do_zboot_setup, "", ""),
 800         U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""),
 801         U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
 802         U_BOOT_CMD_MKENT(dump, 2, 1, do_zboot_dump, "", ""),
 803 )
 804
 805 int do_zboot_states(struct cmd_tbl *cmdtp, int flag, int argc,
 806                     char *const argv[], int state_mask)
 807 {
 808         int i;
 809
 810         for (i = 0; i < ZBOOT_STATE_COUNT; i++) {
 811                 struct cmd_tbl *cmd = &zboot_subcmds[i];
 812                 int mask = 1 << i;
 813                 int ret;
 814
 815                 if (mask & state_mask) {
 816                         ret = cmd->cmd(cmd, flag, argc, argv);
 817                         if (ret)
 818                                 return ret;
 819                 }
 820         }
 821
 822         return 0;
 823 }
 824
 825 int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
 826                     char *const argv[], int *repeatable)
 827 {
 828         /* determine if we have a sub command */
 829         if (argc > 1) {
 830                 char *endp;
 831
 832                 hextoul(argv[1], &endp);
 833                 /*
 834                  * endp pointing to nul means that argv[1] was just a valid
 835                  * number, so pass it along to the normal processing
 836                  */
 837                 if (*endp)
 838                         return do_zboot(cmdtp, flag, argc, argv, repeatable);
 839         }
 840
 841         do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
 842                         ZBOOT_STATE_LOAD | ZBOOT_STATE_SETUP |
 843                         ZBOOT_STATE_INFO | ZBOOT_STATE_GO);
 844
 845         return CMD_RET_FAILURE;
 846 }
 847
 848 U_BOOT_CMDREP_COMPLETE(
 849         zboot, 8, do_zboot_parent, "Boot bzImage",
 850         "[addr] [size] [initrd addr] [initrd size] [setup] [cmdline]\n"
 851         "      addr -        The optional starting address of the bzimage.\n"
 852         "                    If not set it defaults to the environment\n"
 853         "                    variable \"fileaddr\".\n"
 854         "      size -        The optional size of the bzimage. Defaults to\n"
 855         "                    zero.\n"
 856         "      initrd addr - The address of the initrd image to use, if any.\n"
 857         "      initrd size - The size of the initrd image to use, if any.\n"
 858         "      setup -       The address of the kernel setup region, if this\n"
 859         "                    is not at addr\n"
 860         "      cmdline -     Environment variable containing the kernel\n"
 861         "                    command line, to override U-Boot's normal\n"
 862         "                    cmdline generation\n"
 863         "\n"
 864         "Sub-commands to do part of the zboot sequence:\n"
 865         "\tstart [addr [arg ...]] - specify arguments\n"
 866         "\tload   - load OS image\n"
 867         "\tsetup  - set up table\n"
 868         "\tinfo   - show summary info\n"
 869         "\tgo     - start OS\n"
 870         "\tdump [addr]    - dump info (optional address of boot params)",
 871         complete_zboot
 872 );