boot/bootm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000-2009
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #ifndef USE_HOSTCC
   8 #include <common.h>
   9 #include <bootstage.h>
  10 #include <cli.h>
  11 #include <command.h>
  12 #include <cpu_func.h>
  13 #include <env.h>
  14 #include <errno.h>
  15 #include <fdt_support.h>
  16 #include <irq_func.h>
  17 #include <lmb.h>
  18 #include <log.h>
  19 #include <malloc.h>
  20 #include <mapmem.h>
  21 #include <net.h>
  22 #include <asm/cache.h>
  23 #include <asm/global_data.h>
  24 #include <asm/io.h>
  25 #include <linux/sizes.h>
  26 #include <tpm-v2.h>
  27 #if defined(CONFIG_CMD_USB)
  28 #include <usb.h>
  29 #endif
  30 #else
  31 #include "mkimage.h"
  32 #endif
  33
  34 #include <bootm.h>
  35 #include <image.h>
  36
  37 #define MAX_CMDLINE_SIZE        SZ_4K
  38
  39 #define IH_INITRD_ARCH IH_ARCH_DEFAULT
  40
  41 #ifndef USE_HOSTCC
  42
  43 DECLARE_GLOBAL_DATA_PTR;
  44
  45 struct bootm_headers images;            /* pointers to os/initrd/fdt images */
  46
  47 static const void *boot_get_kernel(struct cmd_tbl *cmdtp, int flag, int argc,
  48                                    char *const argv[], struct bootm_headers *images,
  49                                    ulong *os_data, ulong *os_len);
  50
  51 __weak void board_quiesce_devices(void)
  52 {
  53 }
  54
  55 #ifdef CONFIG_LMB
  56 static void boot_start_lmb(struct bootm_headers *images)
  57 {
  58         ulong           mem_start;
  59         phys_size_t     mem_size;
  60
  61         mem_start = env_get_bootm_low();
  62         mem_size = env_get_bootm_size();
  63
  64         lmb_init_and_reserve_range(&images->lmb, (phys_addr_t)mem_start,
  65                                    mem_size, NULL);
  66 }
  67 #else
  68 #define lmb_reserve(lmb, base, size)
  69 static inline void boot_start_lmb(struct bootm_headers *images) { }
  70 #endif
  71
  72 static int bootm_start(struct cmd_tbl *cmdtp, int flag, int argc,
  73                        char *const argv[])
  74 {
  75         memset((void *)&images, 0, sizeof(images));
  76         images.verify = env_get_yesno("verify");
  77
  78         boot_start_lmb(&images);
  79
  80         bootstage_mark_name(BOOTSTAGE_ID_BOOTM_START, "bootm_start");
  81         images.state = BOOTM_STATE_START;
  82
  83         return 0;
  84 }
  85
  86 static ulong bootm_data_addr(int argc, char *const argv[])
  87 {
  88         ulong addr;
  89
  90         if (argc > 0)
  91                 addr = simple_strtoul(argv[0], NULL, 16);
  92         else
  93                 addr = image_load_addr;
  94
  95         return addr;
  96 }
  97
  98 static int bootm_pre_load(struct cmd_tbl *cmdtp, int flag, int argc,
  99                           char *const argv[])
 100 {
 101         ulong data_addr = bootm_data_addr(argc, argv);
 102         int ret = 0;
 103
 104         if (IS_ENABLED(CONFIG_CMD_BOOTM_PRE_LOAD))
 105                 ret = image_pre_load(data_addr);
 106
 107         if (ret)
 108                 ret = CMD_RET_FAILURE;
 109
 110         return ret;
 111 }
 112
 113 static int bootm_find_os(struct cmd_tbl *cmdtp, int flag, int argc,
 114                          char *const argv[])
 115 {
 116         const void *os_hdr;
 117 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 118         const void *vendor_boot_img;
 119         const void *boot_img;
 120 #endif
 121         bool ep_found = false;
 122         int ret;
 123
 124         /* get kernel image header, start address and length */
 125         os_hdr = boot_get_kernel(cmdtp, flag, argc, argv,
 126                         &images, &images.os.image_start, &images.os.image_len);
 127         if (images.os.image_len == 0) {
 128                 puts("ERROR: can't get kernel image!\n");
 129                 return 1;
 130         }
 131
 132         /* get image parameters */
 133         switch (genimg_get_format(os_hdr)) {
 134 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 135         case IMAGE_FORMAT_LEGACY:
 136                 images.os.type = image_get_type(os_hdr);
 137                 images.os.comp = image_get_comp(os_hdr);
 138                 images.os.os = image_get_os(os_hdr);
 139
 140                 images.os.end = image_get_image_end(os_hdr);
 141                 images.os.load = image_get_load(os_hdr);
 142                 images.os.arch = image_get_arch(os_hdr);
 143                 break;
 144 #endif
 145 #if CONFIG_IS_ENABLED(FIT)
 146         case IMAGE_FORMAT_FIT:
 147                 if (fit_image_get_type(images.fit_hdr_os,
 148                                        images.fit_noffset_os,
 149                                        &images.os.type)) {
 150                         puts("Can't get image type!\n");
 151                         bootstage_error(BOOTSTAGE_ID_FIT_TYPE);
 152                         return 1;
 153                 }
 154
 155                 if (fit_image_get_comp(images.fit_hdr_os,
 156                                        images.fit_noffset_os,
 157                                        &images.os.comp)) {
 158                         puts("Can't get image compression!\n");
 159                         bootstage_error(BOOTSTAGE_ID_FIT_COMPRESSION);
 160                         return 1;
 161                 }
 162
 163                 if (fit_image_get_os(images.fit_hdr_os, images.fit_noffset_os,
 164                                      &images.os.os)) {
 165                         puts("Can't get image OS!\n");
 166                         bootstage_error(BOOTSTAGE_ID_FIT_OS);
 167                         return 1;
 168                 }
 169
 170                 if (fit_image_get_arch(images.fit_hdr_os,
 171                                        images.fit_noffset_os,
 172                                        &images.os.arch)) {
 173                         puts("Can't get image ARCH!\n");
 174                         return 1;
 175                 }
 176
 177                 images.os.end = fit_get_end(images.fit_hdr_os);
 178
 179                 if (fit_image_get_load(images.fit_hdr_os, images.fit_noffset_os,
 180                                        &images.os.load)) {
 181                         puts("Can't get image load address!\n");
 182                         bootstage_error(BOOTSTAGE_ID_FIT_LOADADDR);
 183                         return 1;
 184                 }
 185                 break;
 186 #endif
 187 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 188         case IMAGE_FORMAT_ANDROID:
 189                 boot_img = os_hdr;
 190                 vendor_boot_img = NULL;
 191                 if (IS_ENABLED(CONFIG_CMD_ABOOTIMG)) {
 192                         boot_img = map_sysmem(get_abootimg_addr(), 0);
 193                         vendor_boot_img = map_sysmem(get_avendor_bootimg_addr(), 0);
 194                 }
 195                 images.os.type = IH_TYPE_KERNEL;
 196                 images.os.comp = android_image_get_kcomp(boot_img, vendor_boot_img);
 197                 images.os.os = IH_OS_LINUX;
 198                 images.os.end = android_image_get_end(boot_img, vendor_boot_img);
 199                 images.os.load = android_image_get_kload(boot_img, vendor_boot_img);
 200                 images.ep = images.os.load;
 201                 ep_found = true;
 202                 if (IS_ENABLED(CONFIG_CMD_ABOOTIMG)) {
 203                         unmap_sysmem(vendor_boot_img);
 204                         unmap_sysmem(boot_img);
 205                 }
 206                 break;
 207 #endif
 208         default:
 209                 puts("ERROR: unknown image format type!\n");
 210                 return 1;
 211         }
 212
 213         /* If we have a valid setup.bin, we will use that for entry (x86) */
 214         if (images.os.arch == IH_ARCH_I386 ||
 215             images.os.arch == IH_ARCH_X86_64) {
 216                 ulong len;
 217
 218                 ret = boot_get_setup(&images, IH_ARCH_I386, &images.ep, &len);
 219                 if (ret < 0 && ret != -ENOENT) {
 220                         puts("Could not find a valid setup.bin for x86\n");
 221                         return 1;
 222                 }
 223                 /* Kernel entry point is the setup.bin */
 224         } else if (images.legacy_hdr_valid) {
 225                 images.ep = image_get_ep(&images.legacy_hdr_os_copy);
 226 #if CONFIG_IS_ENABLED(FIT)
 227         } else if (images.fit_uname_os) {
 228                 int ret;
 229
 230                 ret = fit_image_get_entry(images.fit_hdr_os,
 231                                           images.fit_noffset_os, &images.ep);
 232                 if (ret) {
 233                         puts("Can't get entry point property!\n");
 234                         return 1;
 235                 }
 236 #endif
 237         } else if (!ep_found) {
 238                 puts("Could not find kernel entry point!\n");
 239                 return 1;
 240         }
 241
 242         if (images.os.type == IH_TYPE_KERNEL_NOLOAD) {
 243                 if (IS_ENABLED(CONFIG_CMD_BOOTI) &&
 244                     images.os.arch == IH_ARCH_ARM64 &&
 245                     images.os.os == IH_OS_LINUX) {
 246                         ulong image_addr;
 247                         ulong image_size;
 248
 249                         ret = booti_setup(images.os.image_start, &image_addr,
 250                                           &image_size, true);
 251                         if (ret != 0)
 252                                 return 1;
 253
 254                         images.os.type = IH_TYPE_KERNEL;
 255                         images.os.load = image_addr;
 256                         images.ep = image_addr;
 257                 } else {
 258                         images.os.load = images.os.image_start;
 259                         images.ep += images.os.image_start;
 260                 }
 261         }
 262
 263         images.os.start = map_to_sysmem(os_hdr);
 264
 265         return 0;
 266 }
 267
 268 /**
 269  * bootm_find_images - wrapper to find and locate various images
 270  * @flag: Ignored Argument
 271  * @argc: command argument count
 272  * @argv: command argument list
 273  * @start: OS image start address
 274  * @size: OS image size
 275  *
 276  * boot_find_images() will attempt to load an available ramdisk,
 277  * flattened device tree, as well as specifically marked
 278  * "loadable" images (loadables are FIT only)
 279  *
 280  * Note: bootm_find_images will skip an image if it is not found
 281  *
 282  * @return:
 283  *     0, if all existing images were loaded correctly
 284  *     1, if an image is found but corrupted, or invalid
 285  */
 286 int bootm_find_images(int flag, int argc, char *const argv[], ulong start,
 287                       ulong size)
 288 {
 289         int ret;
 290
 291         /* find ramdisk */
 292         ret = boot_get_ramdisk(argc, argv, &images, IH_INITRD_ARCH,
 293                                &images.rd_start, &images.rd_end);
 294         if (ret) {
 295                 puts("Ramdisk image is corrupt or invalid\n");
 296                 return 1;
 297         }
 298
 299         /* check if ramdisk overlaps OS image */
 300         if (images.rd_start && (((ulong)images.rd_start >= start &&
 301                                  (ulong)images.rd_start < start + size) ||
 302                                 ((ulong)images.rd_end > start &&
 303                                  (ulong)images.rd_end <= start + size) ||
 304                                 ((ulong)images.rd_start < start &&
 305                                  (ulong)images.rd_end >= start + size))) {
 306                 printf("ERROR: RD image overlaps OS image (OS=0x%lx..0x%lx)\n",
 307                        start, start + size);
 308                 return 1;
 309         }
 310
 311 #if CONFIG_IS_ENABLED(OF_LIBFDT)
 312         /* find flattened device tree */
 313         ret = boot_get_fdt(flag, argc, argv, IH_ARCH_DEFAULT, &images,
 314                            &images.ft_addr, &images.ft_len);
 315         if (ret) {
 316                 puts("Could not find a valid device tree\n");
 317                 return 1;
 318         }
 319
 320         /* check if FDT overlaps OS image */
 321         if (images.ft_addr &&
 322             (((ulong)images.ft_addr >= start &&
 323               (ulong)images.ft_addr < start + size) ||
 324              ((ulong)images.ft_addr + images.ft_len >= start &&
 325               (ulong)images.ft_addr + images.ft_len < start + size))) {
 326                 printf("ERROR: FDT image overlaps OS image (OS=0x%lx..0x%lx)\n",
 327                        start, start + size);
 328                 return 1;
 329         }
 330
 331         if (IS_ENABLED(CONFIG_CMD_FDT))
 332                 set_working_fdt_addr(map_to_sysmem(images.ft_addr));
 333 #endif
 334
 335 #if CONFIG_IS_ENABLED(FIT)
 336         if (IS_ENABLED(CONFIG_FPGA)) {
 337                 /* find bitstreams */
 338                 ret = boot_get_fpga(argc, argv, &images, IH_ARCH_DEFAULT,
 339                                     NULL, NULL);
 340                 if (ret) {
 341                         printf("FPGA image is corrupted or invalid\n");
 342                         return 1;
 343                 }
 344         }
 345
 346         /* find all of the loadables */
 347         ret = boot_get_loadable(argc, argv, &images, IH_ARCH_DEFAULT,
 348                                NULL, NULL);
 349         if (ret) {
 350                 printf("Loadable(s) is corrupt or invalid\n");
 351                 return 1;
 352         }
 353 #endif
 354
 355         return 0;
 356 }
 357
 358 static int bootm_find_other(struct cmd_tbl *cmdtp, int flag, int argc,
 359                             char *const argv[])
 360 {
 361         if (((images.os.type == IH_TYPE_KERNEL) ||
 362              (images.os.type == IH_TYPE_KERNEL_NOLOAD) ||
 363              (images.os.type == IH_TYPE_MULTI)) &&
 364             (images.os.os == IH_OS_LINUX ||
 365                  images.os.os == IH_OS_VXWORKS))
 366                 return bootm_find_images(flag, argc, argv, 0, 0);
 367
 368         return 0;
 369 }
 370 #endif /* USE_HOSTC */
 371
 372 #if !defined(USE_HOSTCC) || defined(CONFIG_FIT_SIGNATURE)
 373 /**
 374  * handle_decomp_error() - display a decompression error
 375  *
 376  * This function tries to produce a useful message. In the case where the
 377  * uncompressed size is the same as the available space, we can assume that
 378  * the image is too large for the buffer.
 379  *
 380  * @comp_type:          Compression type being used (IH_COMP_...)
 381  * @uncomp_size:        Number of bytes uncompressed
 382  * @buf_size:           Number of bytes the decompresion buffer was
 383  * @ret:                errno error code received from compression library
 384  * Return: Appropriate BOOTM_ERR_ error code
 385  */
 386 static int handle_decomp_error(int comp_type, size_t uncomp_size,
 387                                size_t buf_size, int ret)
 388 {
 389         const char *name = genimg_get_comp_name(comp_type);
 390
 391         /* ENOSYS means unimplemented compression type, don't reset. */
 392         if (ret == -ENOSYS)
 393                 return BOOTM_ERR_UNIMPLEMENTED;
 394
 395         if (uncomp_size >= buf_size)
 396                 printf("Image too large: increase CONFIG_SYS_BOOTM_LEN\n");
 397         else
 398                 printf("%s: uncompress error %d\n", name, ret);
 399
 400         /*
 401          * The decompression routines are now safe, so will not write beyond
 402          * their bounds. Probably it is not necessary to reset, but maintain
 403          * the current behaviour for now.
 404          */
 405         printf("Must RESET board to recover\n");
 406 #ifndef USE_HOSTCC
 407         bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
 408 #endif
 409
 410         return BOOTM_ERR_RESET;
 411 }
 412 #endif
 413
 414 #ifndef USE_HOSTCC
 415 static int bootm_load_os(struct bootm_headers *images, int boot_progress)
 416 {
 417         struct image_info os = images->os;
 418         ulong load = os.load;
 419         ulong load_end;
 420         ulong blob_start = os.start;
 421         ulong blob_end = os.end;
 422         ulong image_start = os.image_start;
 423         ulong image_len = os.image_len;
 424         ulong flush_start = ALIGN_DOWN(load, ARCH_DMA_MINALIGN);
 425         bool no_overlap;
 426         void *load_buf, *image_buf;
 427         int err;
 428
 429         load_buf = map_sysmem(load, 0);
 430         image_buf = map_sysmem(os.image_start, image_len);
 431         err = image_decomp(os.comp, load, os.image_start, os.type,
 432                            load_buf, image_buf, image_len,
 433                            CONFIG_SYS_BOOTM_LEN, &load_end);
 434         if (err) {
 435                 err = handle_decomp_error(os.comp, load_end - load,
 436                                           CONFIG_SYS_BOOTM_LEN, err);
 437                 bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE);
 438                 return err;
 439         }
 440         /* We need the decompressed image size in the next steps */
 441         images->os.image_len = load_end - load;
 442
 443         flush_cache(flush_start, ALIGN(load_end, ARCH_DMA_MINALIGN) - flush_start);
 444
 445         debug("   kernel loaded at 0x%08lx, end = 0x%08lx\n", load, load_end);
 446         bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);
 447
 448         no_overlap = (os.comp == IH_COMP_NONE && load == image_start);
 449
 450         if (!no_overlap && load < blob_end && load_end > blob_start) {
 451                 debug("images.os.start = 0x%lX, images.os.end = 0x%lx\n",
 452                       blob_start, blob_end);
 453                 debug("images.os.load = 0x%lx, load_end = 0x%lx\n", load,
 454                       load_end);
 455
 456                 /* Check what type of image this is. */
 457                 if (images->legacy_hdr_valid) {
 458                         if (image_get_type(&images->legacy_hdr_os_copy)
 459                                         == IH_TYPE_MULTI)
 460                                 puts("WARNING: legacy format multi component image overwritten\n");
 461                         return BOOTM_ERR_OVERLAP;
 462                 } else {
 463                         puts("ERROR: new format image overwritten - must RESET the board to recover\n");
 464                         bootstage_error(BOOTSTAGE_ID_OVERWRITTEN);
 465                         return BOOTM_ERR_RESET;
 466                 }
 467         }
 468
 469         lmb_reserve(&images->lmb, images->os.load, (load_end -
 470                                                     images->os.load));
 471         return 0;
 472 }
 473
 474 /**
 475  * bootm_disable_interrupts() - Disable interrupts in preparation for load/boot
 476  *
 477  * Return: interrupt flag (0 if interrupts were disabled, non-zero if they were
 478  *      enabled)
 479  */
 480 ulong bootm_disable_interrupts(void)
 481 {
 482         ulong iflag;
 483
 484         /*
 485          * We have reached the point of no return: we are going to
 486          * overwrite all exception vector code, so we cannot easily
 487          * recover from any failures any more...
 488          */
 489         iflag = disable_interrupts();
 490 #ifdef CONFIG_NETCONSOLE
 491         /* Stop the ethernet stack if NetConsole could have left it up */
 492         eth_halt();
 493 #endif
 494
 495 #if defined(CONFIG_CMD_USB)
 496         /*
 497          * turn off USB to prevent the host controller from writing to the
 498          * SDRAM while Linux is booting. This could happen (at least for OHCI
 499          * controller), because the HCCA (Host Controller Communication Area)
 500          * lies within the SDRAM and the host controller writes continously to
 501          * this area (as busmaster!). The HccaFrameNumber is for example
 502          * updated every 1 ms within the HCCA structure in SDRAM! For more
 503          * details see the OpenHCI specification.
 504          */
 505         usb_stop();
 506 #endif
 507         return iflag;
 508 }
 509
 510 #define CONSOLE_ARG             "console="
 511 #define NULL_CONSOLE            (CONSOLE_ARG "ttynull")
 512 #define CONSOLE_ARG_SIZE        sizeof(NULL_CONSOLE)
 513
 514 /**
 515  * fixup_silent_linux() - Handle silencing the linux boot if required
 516  *
 517  * This uses the silent_linux envvar to control whether to add/set a "console="
 518  * parameter to the command line
 519  *
 520  * @buf: Buffer containing the string to process
 521  * @maxlen: Maximum length of buffer
 522  * Return: 0 if OK, -ENOSPC if @maxlen is too small
 523  */
 524 static int fixup_silent_linux(char *buf, int maxlen)
 525 {
 526         int want_silent;
 527         char *cmdline;
 528         int size;
 529
 530         /*
 531          * Move the input string to the end of buffer. The output string will be
 532          * built up at the start.
 533          */
 534         size = strlen(buf) + 1;
 535         if (size * 2 > maxlen)
 536                 return -ENOSPC;
 537         cmdline = buf + maxlen - size;
 538         memmove(cmdline, buf, size);
 539         /*
 540          * Only fix cmdline when requested. The environment variable can be:
 541          *
 542          *      no - we never fixup
 543          *      yes - we always fixup
 544          *      unset - we rely on the console silent flag
 545          */
 546         want_silent = env_get_yesno("silent_linux");
 547         if (want_silent == 0)
 548                 return 0;
 549         else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
 550                 return 0;
 551
 552         debug("before silent fix-up: %s\n", cmdline);
 553         if (*cmdline) {
 554                 char *start = strstr(cmdline, CONSOLE_ARG);
 555
 556                 /* Check space for maximum possible new command line */
 557                 if (size + CONSOLE_ARG_SIZE > maxlen)
 558                         return -ENOSPC;
 559
 560                 if (start) {
 561                         char *end = strchr(start, ' ');
 562                         int start_bytes;
 563
 564                         start_bytes = start - cmdline;
 565                         strncpy(buf, cmdline, start_bytes);
 566                         strncpy(buf + start_bytes, NULL_CONSOLE, CONSOLE_ARG_SIZE);
 567                         if (end)
 568                                 strcpy(buf + start_bytes + CONSOLE_ARG_SIZE - 1, end);
 569                         else
 570                                 buf[start_bytes + CONSOLE_ARG_SIZE] = '\0';
 571                 } else {
 572                         sprintf(buf, "%s %s", cmdline, NULL_CONSOLE);
 573                 }
 574                 if (buf + strlen(buf) >= cmdline)
 575                         return -ENOSPC;
 576         } else {
 577                 if (maxlen < CONSOLE_ARG_SIZE)
 578                         return -ENOSPC;
 579                 strcpy(buf, NULL_CONSOLE);
 580         }
 581         debug("after silent fix-up: %s\n", buf);
 582
 583         return 0;
 584 }
 585
 586 /**
 587  * process_subst() - Handle substitution of ${...} fields in the environment
 588  *
 589  * Handle variable substitution in the provided buffer
 590  *
 591  * @buf: Buffer containing the string to process
 592  * @maxlen: Maximum length of buffer
 593  * Return: 0 if OK, -ENOSPC if @maxlen is too small
 594  */
 595 static int process_subst(char *buf, int maxlen)
 596 {
 597         char *cmdline;
 598         int size;
 599         int ret;
 600
 601         /* Move to end of buffer */
 602         size = strlen(buf) + 1;
 603         cmdline = buf + maxlen - size;
 604         if (buf + size > cmdline)
 605                 return -ENOSPC;
 606         memmove(cmdline, buf, size);
 607
 608         ret = cli_simple_process_macros(cmdline, buf, cmdline - buf);
 609
 610         return ret;
 611 }
 612
 613 int bootm_process_cmdline(char *buf, int maxlen, int flags)
 614 {
 615         int ret;
 616
 617         /* Check config first to enable compiler to eliminate code */
 618         if (IS_ENABLED(CONFIG_SILENT_CONSOLE) &&
 619             !IS_ENABLED(CONFIG_SILENT_U_BOOT_ONLY) &&
 620             (flags & BOOTM_CL_SILENT)) {
 621                 ret = fixup_silent_linux(buf, maxlen);
 622                 if (ret)
 623                         return log_msg_ret("silent", ret);
 624         }
 625         if (IS_ENABLED(CONFIG_BOOTARGS_SUBST) && IS_ENABLED(CONFIG_CMDLINE) &&
 626             (flags & BOOTM_CL_SUBST)) {
 627                 ret = process_subst(buf, maxlen);
 628                 if (ret)
 629                         return log_msg_ret("subst", ret);
 630         }
 631
 632         return 0;
 633 }
 634
 635 int bootm_process_cmdline_env(int flags)
 636 {
 637         const int maxlen = MAX_CMDLINE_SIZE;
 638         bool do_silent;
 639         const char *env;
 640         char *buf;
 641         int ret;
 642
 643         /* First check if any action is needed */
 644         do_silent = IS_ENABLED(CONFIG_SILENT_CONSOLE) &&
 645             !IS_ENABLED(CONFIG_SILENT_U_BOOT_ONLY) && (flags & BOOTM_CL_SILENT);
 646         if (!do_silent && !IS_ENABLED(CONFIG_BOOTARGS_SUBST))
 647                 return 0;
 648
 649         env = env_get("bootargs");
 650         if (env && strlen(env) >= maxlen)
 651                 return -E2BIG;
 652         buf = malloc(maxlen);
 653         if (!buf)
 654                 return -ENOMEM;
 655         if (env)
 656                 strcpy(buf, env);
 657         else
 658                 *buf = '\0';
 659         ret = bootm_process_cmdline(buf, maxlen, flags);
 660         if (!ret) {
 661                 ret = env_set("bootargs", buf);
 662
 663                 /*
 664                  * If buf is "" and bootargs does not exist, this will produce
 665                  * an error trying to delete bootargs. Ignore it
 666                  */
 667                 if (ret == -ENOENT)
 668                         ret = 0;
 669         }
 670         free(buf);
 671         if (ret)
 672                 return log_msg_ret("env", ret);
 673
 674         return 0;
 675 }
 676
 677 int bootm_measure(struct bootm_headers *images)
 678 {
 679         int ret = 0;
 680
 681         /* Skip measurement if EFI is going to do it */
 682         if (images->os.os == IH_OS_EFI &&
 683             IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL) &&
 684             IS_ENABLED(CONFIG_BOOTM_EFI))
 685                 return ret;
 686
 687         if (IS_ENABLED(CONFIG_MEASURED_BOOT)) {
 688                 struct tcg2_event_log elog;
 689                 struct udevice *dev;
 690                 void *initrd_buf;
 691                 void *image_buf;
 692                 const char *s;
 693                 u32 rd_len;
 694                 bool ign;
 695
 696                 elog.log_size = 0;
 697                 ign = IS_ENABLED(CONFIG_MEASURE_IGNORE_LOG);
 698                 ret = tcg2_measurement_init(&dev, &elog, ign);
 699                 if (ret)
 700                         return ret;
 701
 702                 image_buf = map_sysmem(images->os.image_start,
 703                                        images->os.image_len);
 704                 ret = tcg2_measure_data(dev, &elog, 8, images->os.image_len,
 705                                         image_buf, EV_COMPACT_HASH,
 706                                         strlen("linux") + 1, (u8 *)"linux");
 707                 if (ret)
 708                         goto unmap_image;
 709
 710                 rd_len = images->rd_end - images->rd_start;
 711                 initrd_buf = map_sysmem(images->rd_start, rd_len);
 712                 ret = tcg2_measure_data(dev, &elog, 9, rd_len, initrd_buf,
 713                                         EV_COMPACT_HASH, strlen("initrd") + 1,
 714                                         (u8 *)"initrd");
 715                 if (ret)
 716                         goto unmap_initrd;
 717
 718                 if (IS_ENABLED(CONFIG_MEASURE_DEVICETREE)) {
 719                         ret = tcg2_measure_data(dev, &elog, 0, images->ft_len,
 720                                                 (u8 *)images->ft_addr,
 721                                                 EV_TABLE_OF_DEVICES,
 722                                                 strlen("dts") + 1,
 723                                                 (u8 *)"dts");
 724                         if (ret)
 725                                 goto unmap_initrd;
 726                 }
 727
 728                 s = env_get("bootargs");
 729                 if (!s)
 730                         s = "";
 731                 ret = tcg2_measure_data(dev, &elog, 1, strlen(s) + 1, (u8 *)s,
 732                                         EV_PLATFORM_CONFIG_FLAGS,
 733                                         strlen(s) + 1, (u8 *)s);
 734
 735 unmap_initrd:
 736                 unmap_sysmem(initrd_buf);
 737
 738 unmap_image:
 739                 unmap_sysmem(image_buf);
 740                 tcg2_measurement_term(dev, &elog, ret != 0);
 741         }
 742
 743         return ret;
 744 }
 745
 746 /**
 747  * Execute selected states of the bootm command.
 748  *
 749  * Note the arguments to this state must be the first argument, Any 'bootm'
 750  * or sub-command arguments must have already been taken.
 751  *
 752  * Note that if states contains more than one flag it MUST contain
 753  * BOOTM_STATE_START, since this handles and consumes the command line args.
 754  *
 755  * Also note that aside from boot_os_fn functions and bootm_load_os no other
 756  * functions we store the return value of in 'ret' may use a negative return
 757  * value, without special handling.
 758  *
 759  * @param cmdtp         Pointer to bootm command table entry
 760  * @param flag          Command flags (CMD_FLAG_...)
 761  * @param argc          Number of subcommand arguments (0 = no arguments)
 762  * @param argv          Arguments
 763  * @param states        Mask containing states to run (BOOTM_STATE_...)
 764  * @param images        Image header information
 765  * @param boot_progress 1 to show boot progress, 0 to not do this
 766  * Return: 0 if ok, something else on error. Some errors will cause this
 767  *      function to perform a reboot! If states contains BOOTM_STATE_OS_GO
 768  *      then the intent is to boot an OS, so this function will not return
 769  *      unless the image type is standalone.
 770  */
 771 int do_bootm_states(struct cmd_tbl *cmdtp, int flag, int argc,
 772                     char *const argv[], int states, struct bootm_headers *images,
 773                     int boot_progress)
 774 {
 775         boot_os_fn *boot_fn;
 776         ulong iflag = 0;
 777         int ret = 0, need_boot_fn;
 778
 779         images->state |= states;
 780
 781         /*
 782          * Work through the states and see how far we get. We stop on
 783          * any error.
 784          */
 785         if (states & BOOTM_STATE_START)
 786                 ret = bootm_start(cmdtp, flag, argc, argv);
 787
 788         if (!ret && (states & BOOTM_STATE_PRE_LOAD))
 789                 ret = bootm_pre_load(cmdtp, flag, argc, argv);
 790
 791         if (!ret && (states & BOOTM_STATE_FINDOS))
 792                 ret = bootm_find_os(cmdtp, flag, argc, argv);
 793
 794         if (!ret && (states & BOOTM_STATE_FINDOTHER))
 795                 ret = bootm_find_other(cmdtp, flag, argc, argv);
 796
 797         if (IS_ENABLED(CONFIG_MEASURED_BOOT) && !ret &&
 798             (states & BOOTM_STATE_MEASURE))
 799                 bootm_measure(images);
 800
 801         /* Load the OS */
 802         if (!ret && (states & BOOTM_STATE_LOADOS)) {
 803                 iflag = bootm_disable_interrupts();
 804                 ret = bootm_load_os(images, 0);
 805                 if (ret && ret != BOOTM_ERR_OVERLAP)
 806                         goto err;
 807                 else if (ret == BOOTM_ERR_OVERLAP)
 808                         ret = 0;
 809         }
 810
 811         /* Relocate the ramdisk */
 812 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
 813         if (!ret && (states & BOOTM_STATE_RAMDISK)) {
 814                 ulong rd_len = images->rd_end - images->rd_start;
 815
 816                 ret = boot_ramdisk_high(&images->lmb, images->rd_start,
 817                         rd_len, &images->initrd_start, &images->initrd_end);
 818                 if (!ret) {
 819                         env_set_hex("initrd_start", images->initrd_start);
 820                         env_set_hex("initrd_end", images->initrd_end);
 821                 }
 822         }
 823 #endif
 824 #if CONFIG_IS_ENABLED(OF_LIBFDT) && defined(CONFIG_LMB)
 825         if (!ret && (states & BOOTM_STATE_FDT)) {
 826                 boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
 827                 ret = boot_relocate_fdt(&images->lmb, &images->ft_addr,
 828                                         &images->ft_len);
 829         }
 830 #endif
 831
 832         /* From now on, we need the OS boot function */
 833         if (ret)
 834                 return ret;
 835         boot_fn = bootm_os_get_boot_func(images->os.os);
 836         need_boot_fn = states & (BOOTM_STATE_OS_CMDLINE |
 837                         BOOTM_STATE_OS_BD_T | BOOTM_STATE_OS_PREP |
 838                         BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO);
 839         if (boot_fn == NULL && need_boot_fn) {
 840                 if (iflag)
 841                         enable_interrupts();
 842                 printf("ERROR: booting os '%s' (%d) is not supported\n",
 843                        genimg_get_os_name(images->os.os), images->os.os);
 844                 bootstage_error(BOOTSTAGE_ID_CHECK_BOOT_OS);
 845                 return 1;
 846         }
 847
 848
 849         /* Call various other states that are not generally used */
 850         if (!ret && (states & BOOTM_STATE_OS_CMDLINE))
 851                 ret = boot_fn(BOOTM_STATE_OS_CMDLINE, argc, argv, images);
 852         if (!ret && (states & BOOTM_STATE_OS_BD_T))
 853                 ret = boot_fn(BOOTM_STATE_OS_BD_T, argc, argv, images);
 854         if (!ret && (states & BOOTM_STATE_OS_PREP)) {
 855                 ret = bootm_process_cmdline_env(images->os.os == IH_OS_LINUX);
 856                 if (ret) {
 857                         printf("Cmdline setup failed (err=%d)\n", ret);
 858                         ret = CMD_RET_FAILURE;
 859                         goto err;
 860                 }
 861                 ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);
 862         }
 863
 864 #ifdef CONFIG_TRACE
 865         /* Pretend to run the OS, then run a user command */
 866         if (!ret && (states & BOOTM_STATE_OS_FAKE_GO)) {
 867                 char *cmd_list = env_get("fakegocmd");
 868
 869                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
 870                                 images, boot_fn);
 871                 if (!ret && cmd_list)
 872                         ret = run_command_list(cmd_list, -1, flag);
 873         }
 874 #endif
 875
 876         /* Check for unsupported subcommand. */
 877         if (ret) {
 878                 printf("subcommand failed (err=%d)\n", ret);
 879                 return ret;
 880         }
 881
 882         /* Now run the OS! We hope this doesn't return */
 883         if (!ret && (states & BOOTM_STATE_OS_GO))
 884                 ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
 885                                 images, boot_fn);
 886
 887         /* Deal with any fallout */
 888 err:
 889         if (iflag)
 890                 enable_interrupts();
 891
 892         if (ret == BOOTM_ERR_UNIMPLEMENTED)
 893                 bootstage_error(BOOTSTAGE_ID_DECOMP_UNIMPL);
 894         else if (ret == BOOTM_ERR_RESET)
 895                 do_reset(cmdtp, flag, argc, argv);
 896
 897         return ret;
 898 }
 899
 900 int bootm_boot_start(ulong addr, const char *cmdline)
 901 {
 902         static struct cmd_tbl cmd = {"bootm"};
 903         char addr_str[30];
 904         char *argv[] = {addr_str, NULL};
 905         int states;
 906         int ret;
 907
 908         /*
 909          * TODO(sjg@chromium.org): This uses the command-line interface, but
 910          * should not. To clean this up, the various bootm states need to be
 911          * passed an info structure instead of cmdline flags. Then this can
 912          * set up the required info and move through the states without needing
 913          * the command line.
 914          */
 915         states = BOOTM_STATE_START | BOOTM_STATE_FINDOS | BOOTM_STATE_PRE_LOAD |
 916                 BOOTM_STATE_FINDOTHER | BOOTM_STATE_LOADOS |
 917                 BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
 918                 BOOTM_STATE_OS_GO;
 919         if (IS_ENABLED(CONFIG_SYS_BOOT_RAMDISK_HIGH))
 920                 states |= BOOTM_STATE_RAMDISK;
 921         if (IS_ENABLED(CONFIG_PPC) || IS_ENABLED(CONFIG_MIPS))
 922                 states |= BOOTM_STATE_OS_CMDLINE;
 923         images.state |= states;
 924
 925         snprintf(addr_str, sizeof(addr_str), "%lx", addr);
 926
 927         ret = env_set("bootargs", cmdline);
 928         if (ret) {
 929                 printf("Failed to set cmdline\n");
 930                 return ret;
 931         }
 932         ret = do_bootm_states(&cmd, 0, 1, argv, states, &images, 1);
 933
 934         return ret;
 935 }
 936
 937 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 938 /**
 939  * image_get_kernel - verify legacy format kernel image
 940  * @img_addr: in RAM address of the legacy format image to be verified
 941  * @verify: data CRC verification flag
 942  *
 943  * image_get_kernel() verifies legacy image integrity and returns pointer to
 944  * legacy image header if image verification was completed successfully.
 945  *
 946  * returns:
 947  *     pointer to a legacy image header if valid image was found
 948  *     otherwise return NULL
 949  */
 950 static struct legacy_img_hdr *image_get_kernel(ulong img_addr, int verify)
 951 {
 952         struct legacy_img_hdr *hdr = (struct legacy_img_hdr *)img_addr;
 953
 954         if (!image_check_magic(hdr)) {
 955                 puts("Bad Magic Number\n");
 956                 bootstage_error(BOOTSTAGE_ID_CHECK_MAGIC);
 957                 return NULL;
 958         }
 959         bootstage_mark(BOOTSTAGE_ID_CHECK_HEADER);
 960
 961         if (!image_check_hcrc(hdr)) {
 962                 puts("Bad Header Checksum\n");
 963                 bootstage_error(BOOTSTAGE_ID_CHECK_HEADER);
 964                 return NULL;
 965         }
 966
 967         bootstage_mark(BOOTSTAGE_ID_CHECK_CHECKSUM);
 968         image_print_contents(hdr);
 969
 970         if (verify) {
 971                 puts("   Verifying Checksum ... ");
 972                 if (!image_check_dcrc(hdr)) {
 973                         printf("Bad Data CRC\n");
 974                         bootstage_error(BOOTSTAGE_ID_CHECK_CHECKSUM);
 975                         return NULL;
 976                 }
 977                 puts("OK\n");
 978         }
 979         bootstage_mark(BOOTSTAGE_ID_CHECK_ARCH);
 980
 981         if (!image_check_target_arch(hdr)) {
 982                 printf("Unsupported Architecture 0x%x\n", image_get_arch(hdr));
 983                 bootstage_error(BOOTSTAGE_ID_CHECK_ARCH);
 984                 return NULL;
 985         }
 986         return hdr;
 987 }
 988 #endif
 989
 990 /**
 991  * boot_get_kernel - find kernel image
 992  * @os_data: pointer to a ulong variable, will hold os data start address
 993  * @os_len: pointer to a ulong variable, will hold os data length
 994  *
 995  * boot_get_kernel() tries to find a kernel image, verifies its integrity
 996  * and locates kernel data.
 997  *
 998  * returns:
 999  *     pointer to image header if valid image was found, plus kernel start
1000  *     address and length, otherwise NULL
1001  */
1002 static const void *boot_get_kernel(struct cmd_tbl *cmdtp, int flag, int argc,
1003                                    char *const argv[], struct bootm_headers *images,
1004                                    ulong *os_data, ulong *os_len)
1005 {
1006 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
1007         struct legacy_img_hdr   *hdr;
1008 #endif
1009         ulong           img_addr;
1010         const void *buf;
1011         const char      *fit_uname_config = NULL;
1012         const char      *fit_uname_kernel = NULL;
1013 #if CONFIG_IS_ENABLED(FIT)
1014         int             os_noffset;
1015 #endif
1016
1017 #ifdef CONFIG_ANDROID_BOOT_IMAGE
1018         const void *boot_img;
1019         const void *vendor_boot_img;
1020 #endif
1021         img_addr = genimg_get_kernel_addr_fit(argc < 1 ? NULL : argv[0],
1022                                               &fit_uname_config,
1023                                               &fit_uname_kernel);
1024
1025         if (IS_ENABLED(CONFIG_CMD_BOOTM_PRE_LOAD))
1026                 img_addr += image_load_offset;
1027
1028         bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);
1029
1030         /* check image type, for FIT images get FIT kernel node */
1031         *os_data = *os_len = 0;
1032         buf = map_sysmem(img_addr, 0);
1033         switch (genimg_get_format(buf)) {
1034 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
1035         case IMAGE_FORMAT_LEGACY:
1036                 printf("## Booting kernel from Legacy Image at %08lx ...\n",
1037                        img_addr);
1038                 hdr = image_get_kernel(img_addr, images->verify);
1039                 if (!hdr)
1040                         return NULL;
1041                 bootstage_mark(BOOTSTAGE_ID_CHECK_IMAGETYPE);
1042
1043                 /* get os_data and os_len */
1044                 switch (image_get_type(hdr)) {
1045                 case IH_TYPE_KERNEL:
1046                 case IH_TYPE_KERNEL_NOLOAD:
1047                         *os_data = image_get_data(hdr);
1048                         *os_len = image_get_data_size(hdr);
1049                         break;
1050                 case IH_TYPE_MULTI:
1051                         image_multi_getimg(hdr, 0, os_data, os_len);
1052                         break;
1053                 case IH_TYPE_STANDALONE:
1054                         *os_data = image_get_data(hdr);
1055                         *os_len = image_get_data_size(hdr);
1056                         break;
1057                 default:
1058                         printf("Wrong Image Type for %s command\n",
1059                                cmdtp->name);
1060                         bootstage_error(BOOTSTAGE_ID_CHECK_IMAGETYPE);
1061                         return NULL;
1062                 }
1063
1064                 /*
1065                  * copy image header to allow for image overwrites during
1066                  * kernel decompression.
1067                  */
1068                 memmove(&images->legacy_hdr_os_copy, hdr,
1069                         sizeof(struct legacy_img_hdr));
1070
1071                 /* save pointer to image header */
1072                 images->legacy_hdr_os = hdr;
1073
1074                 images->legacy_hdr_valid = 1;
1075                 bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
1076                 break;
1077 #endif
1078 #if CONFIG_IS_ENABLED(FIT)
1079         case IMAGE_FORMAT_FIT:
1080                 os_noffset = fit_image_load(images, img_addr,
1081                                 &fit_uname_kernel, &fit_uname_config,
1082                                 IH_ARCH_DEFAULT, IH_TYPE_KERNEL,
1083                                 BOOTSTAGE_ID_FIT_KERNEL_START,
1084                                 FIT_LOAD_IGNORED, os_data, os_len);
1085                 if (os_noffset < 0)
1086                         return NULL;
1087
1088                 images->fit_hdr_os = map_sysmem(img_addr, 0);
1089                 images->fit_uname_os = fit_uname_kernel;
1090                 images->fit_uname_cfg = fit_uname_config;
1091                 images->fit_noffset_os = os_noffset;
1092                 break;
1093 #endif
1094 #ifdef CONFIG_ANDROID_BOOT_IMAGE
1095         case IMAGE_FORMAT_ANDROID:
1096                 boot_img = buf;
1097                 vendor_boot_img = NULL;
1098                 if (IS_ENABLED(CONFIG_CMD_ABOOTIMG)) {
1099                         boot_img = map_sysmem(get_abootimg_addr(), 0);
1100                         vendor_boot_img = map_sysmem(get_avendor_bootimg_addr(), 0);
1101                 }
1102                 printf("## Booting Android Image at 0x%08lx ...\n", img_addr);
1103                 if (android_image_get_kernel(boot_img, vendor_boot_img, images->verify,
1104                                              os_data, os_len))
1105                         return NULL;
1106                 if (IS_ENABLED(CONFIG_CMD_ABOOTIMG)) {
1107                         unmap_sysmem(vendor_boot_img);
1108                         unmap_sysmem(boot_img);
1109                 }
1110                 break;
1111 #endif
1112         default:
1113                 printf("Wrong Image Format for %s command\n", cmdtp->name);
1114                 bootstage_error(BOOTSTAGE_ID_FIT_KERNEL_INFO);
1115                 return NULL;
1116         }
1117
1118         debug("   kernel data at 0x%08lx, len = 0x%08lx (%ld)\n",
1119               *os_data, *os_len, *os_len);
1120
1121         return buf;
1122 }
1123
1124 /**
1125  * switch_to_non_secure_mode() - switch to non-secure mode
1126  *
1127  * This routine is overridden by architectures requiring this feature.
1128  */
1129 void __weak switch_to_non_secure_mode(void)
1130 {
1131 }
1132
1133 #else /* USE_HOSTCC */
1134
1135 #if defined(CONFIG_FIT_SIGNATURE)
1136 static int bootm_host_load_image(const void *fit, int req_image_type,
1137                                  int cfg_noffset)
1138 {
1139         const char *fit_uname_config = NULL;
1140         ulong data, len;
1141         struct bootm_headers images;
1142         int noffset;
1143         ulong load_end, buf_size;
1144         uint8_t image_type;
1145         uint8_t image_comp;
1146         void *load_buf;
1147         int ret;
1148
1149         fit_uname_config = fdt_get_name(fit, cfg_noffset, NULL);
1150         memset(&images, '\0', sizeof(images));
1151         images.verify = 1;
1152         noffset = fit_image_load(&images, (ulong)fit,
1153                 NULL, &fit_uname_config,
1154                 IH_ARCH_DEFAULT, req_image_type, -1,
1155                 FIT_LOAD_IGNORED, &data, &len);
1156         if (noffset < 0)
1157                 return noffset;
1158         if (fit_image_get_type(fit, noffset, &image_type)) {
1159                 puts("Can't get image type!\n");
1160                 return -EINVAL;
1161         }
1162
1163         if (fit_image_get_comp(fit, noffset, &image_comp))
1164                 image_comp = IH_COMP_NONE;
1165
1166         /* Allow the image to expand by a factor of 4, should be safe */
1167         buf_size = (1 << 20) + len * 4;
1168         load_buf = malloc(buf_size);
1169         ret = image_decomp(image_comp, 0, data, image_type, load_buf,
1170                            (void *)data, len, buf_size, &load_end);
1171         free(load_buf);
1172
1173         if (ret) {
1174                 ret = handle_decomp_error(image_comp, load_end - 0, buf_size, ret);
1175                 if (ret != BOOTM_ERR_UNIMPLEMENTED)
1176                         return ret;
1177         }
1178
1179         return 0;
1180 }
1181
1182 int bootm_host_load_images(const void *fit, int cfg_noffset)
1183 {
1184         static uint8_t image_types[] = {
1185                 IH_TYPE_KERNEL,
1186                 IH_TYPE_FLATDT,
1187                 IH_TYPE_RAMDISK,
1188         };
1189         int err = 0;
1190         int i;
1191
1192         for (i = 0; i < ARRAY_SIZE(image_types); i++) {
1193                 int ret;
1194
1195                 ret = bootm_host_load_image(fit, image_types[i], cfg_noffset);
1196                 if (!err && ret && ret != -ENOENT)
1197                         err = ret;
1198         }
1199
1200         /* Return the first error we found */
1201         return err;
1202 }
1203 #endif
1204
1205 #endif /* ndef USE_HOSTCC */