main.c revision 294341
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: stable/10/sys/boot/uboot/common/main.c 294341 2016-01-19 21:21:59Z ian $"); 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 44struct uboot_devdesc currdev; 45struct arch_switch archsw; /* MI/MD interface boundary */ 46int devs_no; 47 48uintptr_t uboot_heap_start; 49uintptr_t uboot_heap_end; 50 51struct device_type { 52 const char *name; 53 int type; 54} device_types[] = { 55 { "disk", DEV_TYP_STOR }, 56 { "ide", DEV_TYP_STOR | DT_STOR_IDE }, 57 { "mmc", DEV_TYP_STOR | DT_STOR_MMC }, 58 { "sata", DEV_TYP_STOR | DT_STOR_SATA }, 59 { "scsi", DEV_TYP_STOR | DT_STOR_SCSI }, 60 { "usb", DEV_TYP_STOR | DT_STOR_USB }, 61 { "net", DEV_TYP_NET } 62}; 63 64extern char end[]; 65extern char bootprog_name[]; 66extern char bootprog_rev[]; 67extern char bootprog_date[]; 68extern char bootprog_maker[]; 69 70extern unsigned char _etext[]; 71extern unsigned char _edata[]; 72extern unsigned char __bss_start[]; 73extern unsigned char __sbss_start[]; 74extern unsigned char __sbss_end[]; 75extern unsigned char _end[]; 76 77#ifdef LOADER_FDT_SUPPORT 78extern int command_fdt_internal(int argc, char *argv[]); 79#endif 80 81static void 82dump_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 92static void 93dump_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 107static uint64_t 108memsize(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 121static void 122meminfo(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: %lldMB\n", ub_mem_type(t[i]), 136 size / 1024 / 1024); 137 } 138} 139 140static const char * 141get_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 = -1; 160 return (NULL); 161} 162 163static const char * 164device_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 * Valid device strings: For device types: 186 * 187 * <type_name> DEV_TYP_STOR, DEV_TYP_NET 188 * <type_name><unit> DEV_TYP_STOR, DEV_TYP_NET 189 * <type_name><unit>: DEV_TYP_STOR, DEV_TYP_NET 190 * <type_name><unit>:<slice> DEV_TYP_STOR 191 * <type_name><unit>:<slice>. DEV_TYP_STOR 192 * <type_name><unit>:<slice>.<partition> DEV_TYP_STOR 193 * 194 * For valid type names, see the device_types array, above. 195 * 196 * Slice numbers are 1-based. 0 is a wildcard. 197 */ 198static void 199get_load_device(int *type, int *unit, int *slice, int *partition) 200{ 201 char *devstr; 202 const char *p; 203 char *endp; 204 205 *type = -1; 206 *unit = -1; 207 *slice = 0; 208 *partition = -1; 209 210 devstr = ub_env_get("loaderdev"); 211 if (devstr == NULL) { 212 printf("U-Boot env: loaderdev not set, will probe all devices.\n"); 213 return; 214 } 215 printf("U-Boot env: loaderdev='%s'\n", devstr); 216 217 p = get_device_type(devstr, type); 218 219 /* Ignore optional spaces after the device name. */ 220 while (*p == ' ') 221 p++; 222 223 /* Unknown device name, or a known name without unit number. */ 224 if ((*type == -1) || (*p == '\0')) { 225 return; 226 } 227 228 /* Malformed unit number. */ 229 if (!isdigit(*p)) { 230 *type = -1; 231 return; 232 } 233 234 /* Guaranteed to extract a number from the string, as *p is a digit. */ 235 *unit = strtol(p, &endp, 10); 236 p = endp; 237 238 /* Known device name with unit number and nothing else. */ 239 if (*p == '\0') { 240 return; 241 } 242 243 /* Device string is malformed beyond unit number. */ 244 if (*p != ':') { 245 *type = -1; 246 *unit = -1; 247 return; 248 } 249 250 p++; 251 252 /* No slice and partition specification. */ 253 if ('\0' == *p ) 254 return; 255 256 /* Only DEV_TYP_STOR devices can have a slice specification. */ 257 if (!(*type & DEV_TYP_STOR)) { 258 *type = -1; 259 *unit = -1; 260 return; 261 } 262 263 *slice = strtoul(p, &endp, 10); 264 265 /* Malformed slice number. */ 266 if (p == endp) { 267 *type = -1; 268 *unit = -1; 269 *slice = 0; 270 return; 271 } 272 273 p = endp; 274 275 /* No partition specification. */ 276 if (*p == '\0') 277 return; 278 279 /* Device string is malformed beyond slice number. */ 280 if (*p != '.') { 281 *type = -1; 282 *unit = -1; 283 *slice = 0; 284 return; 285 } 286 287 p++; 288 289 /* No partition specification. */ 290 if (*p == '\0') 291 return; 292 293 *partition = strtol(p, &endp, 10); 294 p = endp; 295 296 /* Full, valid device string. */ 297 if (*endp == '\0') 298 return; 299 300 /* Junk beyond partition number. */ 301 *type = -1; 302 *unit = -1; 303 *slice = 0; 304 *partition = -1; 305} 306 307static void 308print_disk_probe_info() 309{ 310 char slice[32]; 311 char partition[32]; 312 313 if (currdev.d_disk.slice > 0) 314 sprintf(slice, "%d", currdev.d_disk.slice); 315 else 316 strcpy(slice, "<auto>"); 317 318 if (currdev.d_disk.partition >= 0) 319 sprintf(partition, "%d", currdev.d_disk.partition); 320 else 321 strcpy(partition, "<auto>"); 322 323 printf(" Checking unit=%d slice=%s partition=%s...", 324 currdev.d_unit, slice, partition); 325 326} 327 328static int 329probe_disks(int devidx, int load_type, int load_unit, int load_slice, 330 int load_partition) 331{ 332 int open_result, unit; 333 struct open_file f; 334 335 currdev.d_disk.slice = load_slice; 336 currdev.d_disk.partition = load_partition; 337 338 f.f_devdata = &currdev; 339 open_result = -1; 340 341 if (load_type == -1) { 342 printf(" Probing all disk devices...\n"); 343 /* Try each disk in succession until one works. */ 344 for (currdev.d_unit = 0; currdev.d_unit < UB_MAX_DEV; 345 currdev.d_unit++) { 346 print_disk_probe_info(); 347 open_result = devsw[devidx]->dv_open(&f, &currdev); 348 if (open_result == 0) { 349 printf(" good.\n"); 350 return (0); 351 } 352 printf("\n"); 353 } 354 return (-1); 355 } 356 357 if (load_unit == -1) { 358 printf(" Probing all %s devices...\n", device_typename(load_type)); 359 /* Try each disk of given type in succession until one works. */ 360 for (unit = 0; unit < UB_MAX_DEV; unit++) { 361 currdev.d_unit = uboot_diskgetunit(load_type, unit); 362 if (currdev.d_unit == -1) 363 break; 364 print_disk_probe_info(); 365 open_result = devsw[devidx]->dv_open(&f, &currdev); 366 if (open_result == 0) { 367 printf(" good.\n"); 368 return (0); 369 } 370 printf("\n"); 371 } 372 return (-1); 373 } 374 375 if ((currdev.d_unit = uboot_diskgetunit(load_type, load_unit)) != -1) { 376 print_disk_probe_info(); 377 open_result = devsw[devidx]->dv_open(&f,&currdev); 378 if (open_result == 0) { 379 printf(" good.\n"); 380 return (0); 381 } 382 printf("\n"); 383 } 384 385 printf(" Requested disk type/unit/slice/partition not found\n"); 386 return (-1); 387} 388 389int 390main(void) 391{ 392 struct api_signature *sig = NULL; 393 int load_type, load_unit, load_slice, load_partition; 394 int i; 395 const char *ldev; 396 397 /* 398 * If we can't find the magic signature and related info, exit with a 399 * unique error code that U-Boot reports as "## Application terminated, 400 * rc = 0xnnbadab1". Hopefully 'badab1' looks enough like "bad api" to 401 * provide a clue. It's better than 0xffffffff anyway. 402 */ 403 if (!api_search_sig(&sig)) 404 return (0x01badab1); 405 406 syscall_ptr = sig->syscall; 407 if (syscall_ptr == NULL) 408 return (0x02badab1); 409 410 if (sig->version > API_SIG_VERSION) 411 return (0x03badab1); 412 413 /* Clear BSS sections */ 414 bzero(__sbss_start, __sbss_end - __sbss_start); 415 bzero(__bss_start, _end - __bss_start); 416 417 /* 418 * Initialise the heap as early as possible. Once this is done, 419 * alloc() is usable. The stack is buried inside us, so this is safe. 420 */ 421 uboot_heap_start = round_page((uintptr_t)end); 422 uboot_heap_end = uboot_heap_start + 512 * 1024; 423 setheap((void *)uboot_heap_start, (void *)uboot_heap_end); 424 425 /* 426 * Set up console. 427 */ 428 cons_probe(); 429 printf("Compatible U-Boot API signature found @%x\n", (uint32_t)sig); 430 431 printf("\n"); 432 printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 433 printf("(%s, %s)\n", bootprog_maker, bootprog_date); 434 printf("\n"); 435 436 dump_sig(sig); 437 dump_addr_info(); 438 439 meminfo(); 440 441 /* 442 * Enumerate U-Boot devices 443 */ 444 if ((devs_no = ub_dev_enum()) == 0) 445 panic("no U-Boot devices found"); 446 printf("Number of U-Boot devices: %d\n", devs_no); 447 448 get_load_device(&load_type, &load_unit, &load_slice, &load_partition); 449 450 /* 451 * March through the device switch probing for things. 452 */ 453 for (i = 0; devsw[i] != NULL; i++) { 454 455 if (devsw[i]->dv_init == NULL) 456 continue; 457 if ((devsw[i]->dv_init)() != 0) 458 continue; 459 460 printf("Found U-Boot device: %s\n", devsw[i]->dv_name); 461 462 currdev.d_dev = devsw[i]; 463 currdev.d_type = currdev.d_dev->dv_type; 464 currdev.d_unit = 0; 465 466 if ((load_type == -1 || (load_type & DEV_TYP_STOR)) && 467 strcmp(devsw[i]->dv_name, "disk") == 0) { 468 if (probe_disks(i, load_type, load_unit, load_slice, 469 load_partition) == 0) 470 break; 471 } 472 473 if ((load_type == -1 || (load_type & DEV_TYP_NET)) && 474 strcmp(devsw[i]->dv_name, "net") == 0) 475 break; 476 } 477 478 /* 479 * If we couldn't find a boot device, return an error to u-boot. 480 * U-boot may be running a boot script that can try something different 481 * so returning an error is better than forcing a reboot. 482 */ 483 if (devsw[i] == NULL) { 484 printf("No boot device found!\n"); 485 return (0xbadef1ce); 486 } 487 488 ldev = uboot_fmtdev(&currdev); 489 env_setenv("currdev", EV_VOLATILE, ldev, uboot_setcurrdev, env_nounset); 490 env_setenv("loaddev", EV_VOLATILE, ldev, env_noset, env_nounset); 491 printf("Booting from %s\n", ldev); 492 493 setenv("LINES", "24", 1); /* optional */ 494 setenv("prompt", "loader>", 1); 495 496 archsw.arch_loadaddr = uboot_loadaddr; 497 archsw.arch_getdev = uboot_getdev; 498 archsw.arch_copyin = uboot_copyin; 499 archsw.arch_copyout = uboot_copyout; 500 archsw.arch_readin = uboot_readin; 501 archsw.arch_autoload = uboot_autoload; 502 503 interact(); /* doesn't return */ 504 505 return (0); 506} 507 508 509COMMAND_SET(heap, "heap", "show heap usage", command_heap); 510static int 511command_heap(int argc, char *argv[]) 512{ 513 514 printf("heap base at %p, top at %p, used %d\n", end, sbrk(0), 515 sbrk(0) - end); 516 517 return (CMD_OK); 518} 519 520COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 521static int 522command_reboot(int argc, char *argv[]) 523{ 524 525 printf("Resetting...\n"); 526 ub_reset(); 527 528 printf("Reset failed!\n"); 529 while(1); 530} 531 532COMMAND_SET(devinfo, "devinfo", "show U-Boot devices", command_devinfo); 533static int 534command_devinfo(int argc, char *argv[]) 535{ 536 int i; 537 538 if ((devs_no = ub_dev_enum()) == 0) { 539 command_errmsg = "no U-Boot devices found!?"; 540 return (CMD_ERROR); 541 } 542 543 printf("U-Boot devices:\n"); 544 for (i = 0; i < devs_no; i++) { 545 ub_dump_di(i); 546 printf("\n"); 547 } 548 return (CMD_OK); 549} 550 551COMMAND_SET(sysinfo, "sysinfo", "show U-Boot system info", command_sysinfo); 552static int 553command_sysinfo(int argc, char *argv[]) 554{ 555 struct sys_info *si; 556 557 if ((si = ub_get_sys_info()) == NULL) { 558 command_errmsg = "could not retrieve U-Boot sys info!?"; 559 return (CMD_ERROR); 560 } 561 562 printf("U-Boot system info:\n"); 563 ub_dump_si(si); 564 return (CMD_OK); 565} 566 567enum ubenv_action { 568 UBENV_UNKNOWN, 569 UBENV_SHOW, 570 UBENV_IMPORT 571}; 572 573static void 574handle_uboot_env_var(enum ubenv_action action, const char * var) 575{ 576 char ldvar[128]; 577 const char *val; 578 char *wrk; 579 int len; 580 581 /* 582 * On an import with the variable name formatted as ldname=ubname, 583 * import the uboot variable ubname into the loader variable ldname, 584 * otherwise the historical behavior is to import to uboot.ubname. 585 */ 586 if (action == UBENV_IMPORT) { 587 len = strcspn(var, "="); 588 if (var[len] == 0) { 589 strcpy(ldvar, "uboot."); 590 strncat(ldvar, var, sizeof(ldvar) - 7); 591 } else { 592 len = MIN(len, sizeof(ldvar) - 1); 593 strncpy(ldvar, var, len); 594 ldvar[len] = 0; 595 var = &var[len + 1]; 596 } 597 } 598 599 /* 600 * If the user prepended "uboot." (which is how they usually see these 601 * names) strip it off as a convenience. 602 */ 603 if (strncmp(var, "uboot.", 6) == 0) { 604 var = &var[6]; 605 } 606 607 /* If ldvar is malformed or there's no variable name left, punt. */ 608 if (ldvar[0] == 0 || var[0] == 0) 609 return; 610 611 val = ub_env_get(var); 612 if (action == UBENV_SHOW) { 613 if (val == NULL) 614 printf("uboot.%s is not set\n", var); 615 else 616 printf("uboot.%s=%s\n", var, val); 617 } else if (action == UBENV_IMPORT) { 618 if (val != NULL) { 619 setenv(ldvar, val, 1); 620 } 621 } 622} 623 624static int 625command_ubenv(int argc, char *argv[]) 626{ 627 enum ubenv_action action; 628 const char *var; 629 int i; 630 631 action = UBENV_UNKNOWN; 632 if (argc > 1) { 633 if (strcasecmp(argv[1], "import") == 0) 634 action = UBENV_IMPORT; 635 else if (strcasecmp(argv[1], "show") == 0) 636 action = UBENV_SHOW; 637 } 638 if (action == UBENV_UNKNOWN) { 639 command_errmsg = "usage: 'ubenv <import|show> [var ...]"; 640 return (CMD_ERROR); 641 } 642 643 if (argc > 2) { 644 for (i = 2; i < argc; i++) 645 handle_uboot_env_var(action, argv[i]); 646 } else { 647 var = NULL; 648 for (;;) { 649 if ((var = ub_env_enum(var)) == NULL) 650 break; 651 handle_uboot_env_var(action, var); 652 } 653 } 654 655 return (CMD_OK); 656} 657COMMAND_SET(ubenv, "ubenv", "show or import U-Boot env vars", command_ubenv); 658 659#ifdef LOADER_FDT_SUPPORT 660/* 661 * Since proper fdt command handling function is defined in fdt_loader_cmd.c, 662 * and declaring it as extern is in contradiction with COMMAND_SET() macro 663 * (which uses static pointer), we're defining wrapper function, which 664 * calls the proper fdt handling routine. 665 */ 666static int 667command_fdt(int argc, char *argv[]) 668{ 669 670 return (command_fdt_internal(argc, argv)); 671} 672 673COMMAND_SET(fdt, "fdt", "flattened device tree handling", command_fdt); 674#endif 675