1 /*- 2 * Copyright (c) 2000 Benno Rice <benno@jeamland.net> 3 * Copyright (c) 2000 Stephane Potvin <sepotvin@videotron.ca> 4 * Copyright (c) 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 #include <sys/param.h> 32 33 #include <stand.h> 34 35 #include "api_public.h" 36 #include "bootstrap.h" 37 #include "glue.h" 38 #include "libuboot.h" 39 40 #ifndef nitems 41 #define nitems(x) (sizeof((x)) / sizeof((x)[0])) 42 #endif 43 44 #ifndef HEAP_SIZE 45 #define HEAP_SIZE (2 * 1024 * 1024) 46 #endif 47 48 struct uboot_devdesc currdev; 49 struct arch_switch archsw; /* MI/MD interface boundary */ 50 int devs_no; 51 52 uintptr_t uboot_heap_start; 53 uintptr_t uboot_heap_end; 54 55 struct device_type { 56 const char *name; 57 int type; 58 } device_types[] = { 59 { "disk", DEV_TYP_STOR }, 60 { "ide", DEV_TYP_STOR | DT_STOR_IDE }, 61 { "mmc", DEV_TYP_STOR | DT_STOR_MMC }, 62 { "sata", DEV_TYP_STOR | DT_STOR_SATA }, 63 { "scsi", DEV_TYP_STOR | DT_STOR_SCSI }, 64 { "usb", DEV_TYP_STOR | DT_STOR_USB }, 65 { "net", DEV_TYP_NET } 66 }; 67 68 extern char end[]; 69 70 extern unsigned char _etext[]; 71 extern unsigned char _edata[]; 72 extern unsigned char __bss_start[]; 73 extern unsigned char __sbss_start[]; 74 extern unsigned char __sbss_end[]; 75 extern unsigned char _end[]; 76 77 #ifdef LOADER_FDT_SUPPORT 78 extern int command_fdt_internal(int argc, char *argv[]); 79 #endif 80 81 static void 82 dump_sig(struct api_signature *sig) 83 { 84 #ifdef DEBUG 85 printf("signature:\n"); 86 printf(" version\t= %d\n", sig->version); 87 printf(" checksum\t= 0x%08x\n", sig->checksum); 88 printf(" sc entry\t= 0x%08x\n", sig->syscall); 89 #endif 90 } 91 92 static void 93 dump_addr_info(void) 94 { 95 #ifdef DEBUG 96 printf("\naddresses info:\n"); 97 printf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); 98 printf(" _edata = 0x%08x\n", (uint32_t)_edata); 99 printf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start); 100 printf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end); 101 printf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start); 102 printf(" _end = 0x%08x\n", (uint32_t)_end); 103 printf(" syscall entry = 0x%08x\n", (uint32_t)syscall_ptr); 104 #endif 105 } 106 107 static uint64_t 108 memsize(struct sys_info *si, int flags) 109 { 110 uint64_t size; 111 int i; 112 113 size = 0; 114 for (i = 0; i < si->mr_no; i++) 115 if (si->mr[i].flags == flags && si->mr[i].size) 116 size += (si->mr[i].size); 117 118 return (size); 119 } 120 121 static void 122 meminfo(void) 123 { 124 uint64_t size; 125 struct sys_info *si; 126 int t[3] = { MR_ATTR_DRAM, MR_ATTR_FLASH, MR_ATTR_SRAM }; 127 int i; 128 129 if ((si = ub_get_sys_info()) == NULL) 130 panic("could not retrieve system info"); 131 132 for (i = 0; i < 3; i++) { 133 size = memsize(si, t[i]); 134 if (size > 0) 135 printf("%s: %juMB\n", ub_mem_type(t[i]), 136 (uintmax_t)(size / 1024 / 1024)); 137 } 138 } 139 140 static const char * 141 get_device_type(const char *devstr, int *devtype) 142 { 143 int i; 144 int namelen; 145 struct device_type *dt; 146 147 if (devstr) { 148 for (i = 0; i < nitems(device_types); i++) { 149 dt = &device_types[i]; 150 namelen = strlen(dt->name); 151 if (strncmp(dt->name, devstr, namelen) == 0) { 152 *devtype = dt->type; 153 return (devstr + namelen); 154 } 155 } 156 printf("Unknown device type '%s'\n", devstr); 157 } 158 159 *devtype = DEV_TYP_NONE; 160 return (NULL); 161 } 162 163 static const char * 164 device_typename(int type) 165 { 166 int i; 167 168 for (i = 0; i < nitems(device_types); i++) 169 if (device_types[i].type == type) 170 return (device_types[i].name); 171 172 return ("<unknown>"); 173 } 174 175 /* 176 * Parse a device string into type, unit, slice and partition numbers. A 177 * returned value of -1 for type indicates a search should be done for the 178 * first loadable device, otherwise a returned value of -1 for unit 179 * indicates a search should be done for the first loadable device of the 180 * given type. 181 * 182 * The returned values for slice and partition are interpreted by 183 * disk_open(). 184 * 185 * The device string can be a standard loader(8) disk specifier: 186 * 187 * disk<unit>s<slice> disk0s1 188 * disk<unit>s<slice><partition> disk1s2a 189 * disk<unit>p<partition> disk0p4 190 * 191 * or one of the following formats: 192 * 193 * Valid device strings: For device types: 194 * 195 * <type_name> DEV_TYP_STOR, DEV_TYP_NET 196 * <type_name><unit> DEV_TYP_STOR, DEV_TYP_NET 197 * <type_name><unit>: DEV_TYP_STOR, DEV_TYP_NET 198 * <type_name><unit>:<slice> DEV_TYP_STOR 199 * <type_name><unit>:<slice>. DEV_TYP_STOR 200 * <type_name><unit>:<slice>.<partition> DEV_TYP_STOR 201 * 202 * For valid type names, see the device_types array, above. 203 * 204 * Slice numbers are 1-based. 0 is a wildcard. 205 */ 206 static void 207 get_load_device(int *type, int *unit, int *slice, int *partition) 208 { 209 struct disk_devdesc dev; 210 char *devstr; 211 const char *p; 212 char *endp; 213 214 *type = DEV_TYP_NONE; 215 *unit = -1; 216 *slice = D_SLICEWILD; 217 *partition = D_PARTWILD; 218 219 devstr = ub_env_get("loaderdev"); 220 if (devstr == NULL) { 221 printf("U-Boot env: loaderdev not set, will probe all devices.\n"); 222 return; 223 } 224 printf("U-Boot env: loaderdev='%s'\n", devstr); 225 226 p = get_device_type(devstr, type); 227 228 /* 229 * If type is DEV_TYP_STOR we have a disk-like device. If the remainder 230 * of the string contains spaces, dots, or a colon in any location other 231 * than the last char, it's legacy format. Otherwise it might be 232 * standard loader(8) format (e.g., disk0s2a or mmc1p12), so try to 233 * parse the remainder of the string as such, and if it works, return 234 * those results. Otherwise we'll fall through to the code that parses 235 * the legacy format. 236 */ 237 if (*type & DEV_TYP_STOR) { 238 size_t len = strlen(p); 239 if (strcspn(p, " .") == len && strcspn(p, ":") >= len - 1 && 240 disk_parsedev(&dev, p, NULL) == 0) { 241 *unit = dev.dd.d_unit; 242 *slice = dev.d_slice; 243 *partition = dev.d_partition; 244 return; 245 } 246 } 247 248 /* Ignore optional spaces after the device name. */ 249 while (*p == ' ') 250 p++; 251 252 /* Unknown device name, or a known name without unit number. */ 253 if ((*type == DEV_TYP_NONE) || (*p == '\0')) { 254 return; 255 } 256 257 /* Malformed unit number. */ 258 if (!isdigit(*p)) { 259 *type = DEV_TYP_NONE; 260 return; 261 } 262 263 /* Guaranteed to extract a number from the string, as *p is a digit. */ 264 *unit = strtol(p, &endp, 10); 265 p = endp; 266 267 /* Known device name with unit number and nothing else. */ 268 if (*p == '\0') { 269 return; 270 } 271 272 /* Device string is malformed beyond unit number. */ 273 if (*p != ':') { 274 *type = DEV_TYP_NONE; 275 *unit = -1; 276 return; 277 } 278 279 p++; 280 281 /* No slice and partition specification. */ 282 if ('\0' == *p ) 283 return; 284 285 /* Only DEV_TYP_STOR devices can have a slice specification. */ 286 if (!(*type & DEV_TYP_STOR)) { 287 *type = DEV_TYP_NONE; 288 *unit = -1; 289 return; 290 } 291 292 *slice = strtoul(p, &endp, 10); 293 294 /* Malformed slice number. */ 295 if (p == endp) { 296 *type = DEV_TYP_NONE; 297 *unit = -1; 298 *slice = D_SLICEWILD; 299 return; 300 } 301 302 p = endp; 303 304 /* No partition specification. */ 305 if (*p == '\0') 306 return; 307 308 /* Device string is malformed beyond slice number. */ 309 if (*p != '.') { 310 *type = DEV_TYP_NONE; 311 *unit = -1; 312 *slice = D_SLICEWILD; 313 return; 314 } 315 316 p++; 317 318 /* No partition specification. */ 319 if (*p == '\0') 320 return; 321 322 *partition = strtol(p, &endp, 10); 323 p = endp; 324 325 /* Full, valid device string. */ 326 if (*endp == '\0') 327 return; 328 329 /* Junk beyond partition number. */ 330 *type = DEV_TYP_NONE; 331 *unit = -1; 332 *slice = D_SLICEWILD; 333 *partition = D_PARTWILD; 334 } 335 336 static void 337 print_disk_probe_info() 338 { 339 char slice[32]; 340 char partition[32]; 341 342 if (currdev.d_disk.d_slice == D_SLICENONE) 343 strlcpy(slice, "<none>", sizeof(slice)); 344 else if (currdev.d_disk.d_slice == D_SLICEWILD) 345 strlcpy(slice, "<auto>", sizeof(slice)); 346 else 347 snprintf(slice, sizeof(slice), "%d", currdev.d_disk.d_slice); 348 349 if (currdev.d_disk.d_partition == D_PARTNONE) 350 strlcpy(partition, "<none>", sizeof(partition)); 351 else if (currdev.d_disk.d_partition == D_PARTWILD) 352 strlcpy(partition, "<auto>", sizeof(partition)); 353 else 354 snprintf(partition, sizeof(partition), "%d", 355 currdev.d_disk.d_partition); 356 357 printf(" Checking unit=%d slice=%s partition=%s...", 358 currdev.dd.d_unit, slice, partition); 359 360 } 361 362 static int 363 probe_disks(int devidx, int load_type, int load_unit, int load_slice, 364 int load_partition) 365 { 366 int open_result, unit; 367 struct open_file f; 368 369 currdev.d_disk.d_slice = load_slice; 370 currdev.d_disk.d_partition = load_partition; 371 372 f.f_devdata = &currdev; 373 open_result = -1; 374 375 if (load_type == -1) { 376 printf(" Probing all disk devices...\n"); 377 /* Try each disk in succession until one works. */ 378 for (currdev.dd.d_unit = 0; currdev.dd.d_unit < UB_MAX_DEV; 379 currdev.dd.d_unit++) { 380 print_disk_probe_info(); 381 open_result = devsw[devidx]->dv_open(&f, &currdev); 382 if (open_result == 0) { 383 printf(" good.\n"); 384 return (0); 385 } 386 printf("\n"); 387 } 388 return (-1); 389 } 390 391 if (load_unit == -1) { 392 printf(" Probing all %s devices...\n", device_typename(load_type)); 393 /* Try each disk of given type in succession until one works. */ 394 for (unit = 0; unit < UB_MAX_DEV; unit++) { 395 currdev.dd.d_unit = uboot_diskgetunit(load_type, unit); 396 if (currdev.dd.d_unit == -1) 397 break; 398 print_disk_probe_info(); 399 open_result = devsw[devidx]->dv_open(&f, &currdev); 400 if (open_result == 0) { 401 printf(" good.\n"); 402 return (0); 403 } 404 printf("\n"); 405 } 406 return (-1); 407 } 408 409 if ((currdev.dd.d_unit = uboot_diskgetunit(load_type, load_unit)) != -1) { 410 print_disk_probe_info(); 411 open_result = devsw[devidx]->dv_open(&f,&currdev); 412 if (open_result == 0) { 413 printf(" good.\n"); 414 return (0); 415 } 416 printf("\n"); 417 } 418 419 printf(" Requested disk type/unit/slice/partition not found\n"); 420 return (-1); 421 } 422 423 int 424 main(int argc, char **argv) 425 { 426 struct api_signature *sig = NULL; 427 int load_type, load_unit, load_slice, load_partition; 428 int i; 429 const char *ldev; 430 431 /* 432 * We first check if a command line argument was passed to us containing 433 * API's signature address. If it wasn't then we try to search for the 434 * API signature via the usual hinted address. 435 * If we can't find the magic signature and related info, exit with a 436 * unique error code that U-Boot reports as "## Application terminated, 437 * rc = 0xnnbadab1". Hopefully 'badab1' looks enough like "bad api" to 438 * provide a clue. It's better than 0xffffffff anyway. 439 */ 440 if (!api_parse_cmdline_sig(argc, argv, &sig) && !api_search_sig(&sig)) 441 return (0x01badab1); 442 443 syscall_ptr = sig->syscall; 444 if (syscall_ptr == NULL) 445 return (0x02badab1); 446 447 if (sig->version > API_SIG_VERSION) 448 return (0x03badab1); 449 450 /* Clear BSS sections */ 451 bzero(__sbss_start, __sbss_end - __sbss_start); 452 bzero(__bss_start, _end - __bss_start); 453 454 /* 455 * Initialise the heap as early as possible. Once this is done, 456 * alloc() is usable. We are using the stack u-boot set up near the top 457 * of physical ram; hopefully there is sufficient space between the end 458 * of our bss and the bottom of the u-boot stack to avoid overlap. 459 */ 460 uboot_heap_start = round_page((uintptr_t)end); 461 uboot_heap_end = uboot_heap_start + HEAP_SIZE; 462 setheap((void *)uboot_heap_start, (void *)uboot_heap_end); 463 464 /* 465 * Set up console. 466 */ 467 cons_probe(); 468 printf("Compatible U-Boot API signature found @%p\n", sig); 469 470 printf("\n%s", bootprog_info); 471 printf("\n"); 472 473 dump_sig(sig); 474 dump_addr_info(); 475 476 meminfo(); 477 478 archsw.arch_loadaddr = uboot_loadaddr; 479 archsw.arch_getdev = uboot_getdev; 480 archsw.arch_copyin = uboot_copyin; 481 archsw.arch_copyout = uboot_copyout; 482 archsw.arch_readin = uboot_readin; 483 archsw.arch_autoload = uboot_autoload; 484 485 /* Set up currdev variable to have hooks in place. */ 486 env_setenv("currdev", EV_VOLATILE, "", uboot_setcurrdev, env_nounset); 487 488 /* 489 * Enumerate U-Boot devices 490 */ 491 if ((devs_no = ub_dev_enum()) == 0) { 492 printf("no U-Boot devices found"); 493 goto do_interact; 494 } 495 printf("Number of U-Boot devices: %d\n", devs_no); 496 497 get_load_device(&load_type, &load_unit, &load_slice, &load_partition); 498 499 /* 500 * March through the device switch probing for things. 501 */ 502 for (i = 0; devsw[i] != NULL; i++) { 503 504 if (devsw[i]->dv_init == NULL) 505 continue; 506 if ((devsw[i]->dv_init)() != 0) 507 continue; 508 509 printf("Found U-Boot device: %s\n", devsw[i]->dv_name); 510 511 currdev.dd.d_dev = devsw[i]; 512 currdev.dd.d_unit = 0; 513 514 if ((load_type == DEV_TYP_NONE || (load_type & DEV_TYP_STOR)) && 515 strcmp(devsw[i]->dv_name, "disk") == 0) { 516 if (probe_disks(i, load_type, load_unit, load_slice, 517 load_partition) == 0) 518 break; 519 } 520 521 if ((load_type == DEV_TYP_NONE || (load_type & DEV_TYP_NET)) && 522 strcmp(devsw[i]->dv_name, "net") == 0) 523 break; 524 } 525 526 /* 527 * If we couldn't find a boot device, return an error to u-boot. 528 * U-boot may be running a boot script that can try something different 529 * so returning an error is better than forcing a reboot. 530 */ 531 if (devsw[i] == NULL) { 532 printf("No boot device found!\n"); 533 return (0xbadef1ce); 534 } 535 536 ldev = devformat(&currdev.dd); 537 env_setenv("currdev", EV_VOLATILE, ldev, uboot_setcurrdev, env_nounset); 538 env_setenv("loaddev", EV_VOLATILE, ldev, env_noset, env_nounset); 539 printf("Booting from %s\n", ldev); 540 541 do_interact: 542 setenv("LINES", "24", 1); /* optional */ 543 setenv("prompt", "loader>", 1); 544 #ifdef __powerpc__ 545 setenv("usefdt", "1", 1); 546 #endif 547 548 interact(); /* doesn't return */ 549 550 return (0); 551 } 552 553 554 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 555 static int 556 command_heap(int argc, char *argv[]) 557 { 558 559 printf("heap base at %p, top at %p, used %td\n", end, sbrk(0), 560 sbrk(0) - end); 561 562 return (CMD_OK); 563 } 564 565 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 566 static int 567 command_reboot(int argc, char *argv[]) 568 { 569 570 printf("Resetting...\n"); 571 ub_reset(); 572 573 printf("Reset failed!\n"); 574 while (1); 575 __unreachable(); 576 } 577 578 COMMAND_SET(devinfo, "devinfo", "show U-Boot devices", command_devinfo); 579 static int 580 command_devinfo(int argc, char *argv[]) 581 { 582 int i; 583 584 if ((devs_no = ub_dev_enum()) == 0) { 585 command_errmsg = "no U-Boot devices found!?"; 586 return (CMD_ERROR); 587 } 588 589 printf("U-Boot devices:\n"); 590 for (i = 0; i < devs_no; i++) { 591 ub_dump_di(i); 592 printf("\n"); 593 } 594 return (CMD_OK); 595 } 596 597 COMMAND_SET(sysinfo, "sysinfo", "show U-Boot system info", command_sysinfo); 598 static int 599 command_sysinfo(int argc, char *argv[]) 600 { 601 struct sys_info *si; 602 603 if ((si = ub_get_sys_info()) == NULL) { 604 command_errmsg = "could not retrieve U-Boot sys info!?"; 605 return (CMD_ERROR); 606 } 607 608 printf("U-Boot system info:\n"); 609 ub_dump_si(si); 610 return (CMD_OK); 611 } 612 613 enum ubenv_action { 614 UBENV_UNKNOWN, 615 UBENV_SHOW, 616 UBENV_IMPORT 617 }; 618 619 static void 620 handle_uboot_env_var(enum ubenv_action action, const char * var) 621 { 622 char ldvar[128]; 623 const char *val; 624 char *wrk; 625 int len; 626 627 /* 628 * On an import with the variable name formatted as ldname=ubname, 629 * import the uboot variable ubname into the loader variable ldname, 630 * otherwise the historical behavior is to import to uboot.ubname. 631 */ 632 if (action == UBENV_IMPORT) { 633 len = strcspn(var, "="); 634 if (len == 0) { 635 printf("name cannot start with '=': '%s'\n", var); 636 return; 637 } 638 if (var[len] == 0) { 639 strcpy(ldvar, "uboot."); 640 strncat(ldvar, var, sizeof(ldvar) - 7); 641 } else { 642 len = MIN(len, sizeof(ldvar) - 1); 643 strncpy(ldvar, var, len); 644 ldvar[len] = 0; 645 var = &var[len + 1]; 646 } 647 } 648 649 /* 650 * If the user prepended "uboot." (which is how they usually see these 651 * names) strip it off as a convenience. 652 */ 653 if (strncmp(var, "uboot.", 6) == 0) { 654 var = &var[6]; 655 } 656 657 /* If there is no variable name left, punt. */ 658 if (var[0] == 0) { 659 printf("empty variable name\n"); 660 return; 661 } 662 663 val = ub_env_get(var); 664 if (action == UBENV_SHOW) { 665 if (val == NULL) 666 printf("uboot.%s is not set\n", var); 667 else 668 printf("uboot.%s=%s\n", var, val); 669 } else if (action == UBENV_IMPORT) { 670 if (val != NULL) { 671 setenv(ldvar, val, 1); 672 } 673 } 674 } 675 676 static int 677 command_ubenv(int argc, char *argv[]) 678 { 679 enum ubenv_action action; 680 const char *var; 681 int i; 682 683 action = UBENV_UNKNOWN; 684 if (argc > 1) { 685 if (strcasecmp(argv[1], "import") == 0) 686 action = UBENV_IMPORT; 687 else if (strcasecmp(argv[1], "show") == 0) 688 action = UBENV_SHOW; 689 } 690 if (action == UBENV_UNKNOWN) { 691 command_errmsg = "usage: 'ubenv <import|show> [var ...]"; 692 return (CMD_ERROR); 693 } 694 695 if (argc > 2) { 696 for (i = 2; i < argc; i++) 697 handle_uboot_env_var(action, argv[i]); 698 } else { 699 var = NULL; 700 for (;;) { 701 if ((var = ub_env_enum(var)) == NULL) 702 break; 703 handle_uboot_env_var(action, var); 704 } 705 } 706 707 return (CMD_OK); 708 } 709 COMMAND_SET(ubenv, "ubenv", "show or import U-Boot env vars", command_ubenv); 710 711 #ifdef LOADER_FDT_SUPPORT 712 /* 713 * Since proper fdt command handling function is defined in fdt_loader_cmd.c, 714 * and declaring it as extern is in contradiction with COMMAND_SET() macro 715 * (which uses static pointer), we're defining wrapper function, which 716 * calls the proper fdt handling routine. 717 */ 718 static int 719 command_fdt(int argc, char *argv[]) 720 { 721 722 return (command_fdt_internal(argc, argv)); 723 } 724 725 COMMAND_SET(fdt, "fdt", "flattened device tree handling", command_fdt); 726 #endif 727