1 /* 2 * (C) Copyright 2008 Semihalf 3 * 4 * (C) Copyright 2000-2006 5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 6 * 7 * See file CREDITS for list of people who contributed to this 8 * project. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 of 13 * the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 23 * MA 02111-1307 USA 24 */ 25 26 #define DEBUG 27 28 #ifndef USE_HOSTCC 29 #include <common.h> 30 #include <watchdog.h> 31 32 #ifdef CONFIG_SHOW_BOOT_PROGRESS 33 #include <status_led.h> 34 #endif 35 36 #ifdef CONFIG_HAS_DATAFLASH 37 #include <dataflash.h> 38 #endif 39 40 #ifdef CONFIG_LOGBUFFER 41 #include <logbuff.h> 42 #endif 43 44 #if defined(CONFIG_TIMESTAMP) || defined(CONFIG_CMD_DATE) 45 #include <rtc.h> 46 #endif 47 48 #if defined(CONFIG_FIT) 49 #include <fdt.h> 50 #include <libfdt.h> 51 #include <fdt_support.h> 52 #endif 53 54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 55 56 #ifdef CONFIG_CMD_BDI 57 extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 58 #endif 59 60 DECLARE_GLOBAL_DATA_PTR; 61 62 static image_header_t* image_get_ramdisk (cmd_tbl_t *cmdtp, int flag, 63 int argc, char *argv[], 64 ulong rd_addr, uint8_t arch, int verify); 65 #else 66 #include "mkimage.h" 67 #endif /* USE_HOSTCC*/ 68 69 #include <image.h> 70 71 unsigned long crc32 (unsigned long, const unsigned char *, unsigned int); 72 73 int image_check_hcrc (image_header_t *hdr) 74 { 75 ulong hcrc; 76 ulong len = image_get_header_size (); 77 image_header_t header; 78 79 /* Copy header so we can blank CRC field for re-calculation */ 80 memmove (&header, (char *)hdr, image_get_header_size ()); 81 image_set_hcrc (&header, 0); 82 83 hcrc = crc32 (0, (unsigned char *)&header, len); 84 85 return (hcrc == image_get_hcrc (hdr)); 86 } 87 88 int image_check_dcrc (image_header_t *hdr) 89 { 90 ulong data = image_get_data (hdr); 91 ulong len = image_get_data_size (hdr); 92 ulong dcrc = crc32 (0, (unsigned char *)data, len); 93 94 return (dcrc == image_get_dcrc (hdr)); 95 } 96 97 #ifndef USE_HOSTCC 98 int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz) 99 { 100 ulong dcrc = 0; 101 ulong len = image_get_data_size (hdr); 102 ulong data = image_get_data (hdr); 103 104 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) 105 ulong cdata = data; 106 ulong edata = cdata + len; 107 108 while (cdata < edata) { 109 ulong chunk = edata - cdata; 110 111 if (chunk > chunksz) 112 chunk = chunksz; 113 dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk); 114 cdata += chunk; 115 116 WATCHDOG_RESET (); 117 } 118 #else 119 dcrc = crc32 (0, (unsigned char *)data, len); 120 #endif 121 122 return (dcrc == image_get_dcrc (hdr)); 123 } 124 125 int getenv_verify (void) 126 { 127 char *s = getenv ("verify"); 128 return (s && (*s == 'n')) ? 0 : 1; 129 } 130 131 void memmove_wd (void *to, void *from, size_t len, ulong chunksz) 132 { 133 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) 134 while (len > 0) { 135 size_t tail = (len > chunksz) ? chunksz : len; 136 WATCHDOG_RESET (); 137 memmove (to, from, tail); 138 to += tail; 139 from += tail; 140 len -= tail; 141 } 142 #else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */ 143 memmove (to, from, len); 144 #endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */ 145 } 146 #endif /* USE_HOSTCC */ 147 148 /** 149 * image_multi_count - get component (sub-image) count 150 * @hdr: pointer to the header of the multi component image 151 * 152 * image_multi_count() returns number of components in a multi 153 * component image. 154 * 155 * Note: no checking of the image type is done, caller must pass 156 * a valid multi component image. 157 * 158 * returns: 159 * number of components 160 */ 161 ulong image_multi_count (image_header_t *hdr) 162 { 163 ulong i, count = 0; 164 ulong *size; 165 166 /* get start of the image payload, which in case of multi 167 * component images that points to a table of component sizes */ 168 size = (ulong *)image_get_data (hdr); 169 170 /* count non empty slots */ 171 for (i = 0; size[i]; ++i) 172 count++; 173 174 return count; 175 } 176 177 /** 178 * image_multi_getimg - get component data address and size 179 * @hdr: pointer to the header of the multi component image 180 * @idx: index of the requested component 181 * @data: pointer to a ulong variable, will hold component data address 182 * @len: pointer to a ulong variable, will hold component size 183 * 184 * image_multi_getimg() returns size and data address for the requested 185 * component in a multi component image. 186 * 187 * Note: no checking of the image type is done, caller must pass 188 * a valid multi component image. 189 * 190 * returns: 191 * data address and size of the component, if idx is valid 192 * 0 in data and len, if idx is out of range 193 */ 194 void image_multi_getimg (image_header_t *hdr, ulong idx, 195 ulong *data, ulong *len) 196 { 197 int i; 198 ulong *size; 199 ulong offset, tail, count, img_data; 200 201 /* get number of component */ 202 count = image_multi_count (hdr); 203 204 /* get start of the image payload, which in case of multi 205 * component images that points to a table of component sizes */ 206 size = (ulong *)image_get_data (hdr); 207 208 /* get address of the proper component data start, which means 209 * skipping sizes table (add 1 for last, null entry) */ 210 img_data = image_get_data (hdr) + (count + 1) * sizeof (ulong); 211 212 if (idx < count) { 213 *len = size[idx]; 214 offset = 0; 215 tail = 0; 216 217 /* go over all indices preceding requested component idx */ 218 for (i = 0; i < idx; i++) { 219 /* add up i-th component size */ 220 offset += size[i]; 221 222 /* add up alignment for i-th component */ 223 tail += (4 - size[i] % 4); 224 } 225 226 /* calculate idx-th component data address */ 227 *data = img_data + offset + tail; 228 } else { 229 *len = 0; 230 *data = 0; 231 } 232 } 233 234 #ifndef USE_HOSTCC 235 const char* image_get_os_name (uint8_t os) 236 { 237 const char *name; 238 239 switch (os) { 240 case IH_OS_INVALID: name = "Invalid OS"; break; 241 case IH_OS_NETBSD: name = "NetBSD"; break; 242 case IH_OS_LINUX: name = "Linux"; break; 243 case IH_OS_VXWORKS: name = "VxWorks"; break; 244 case IH_OS_QNX: name = "QNX"; break; 245 case IH_OS_U_BOOT: name = "U-Boot"; break; 246 case IH_OS_RTEMS: name = "RTEMS"; break; 247 #ifdef CONFIG_ARTOS 248 case IH_OS_ARTOS: name = "ARTOS"; break; 249 #endif 250 #ifdef CONFIG_LYNXKDI 251 case IH_OS_LYNXOS: name = "LynxOS"; break; 252 #endif 253 default: name = "Unknown OS"; break; 254 } 255 256 return name; 257 } 258 259 const char* image_get_arch_name (uint8_t arch) 260 { 261 const char *name; 262 263 switch (arch) { 264 case IH_ARCH_INVALID: name = "Invalid Architecture"; break; 265 case IH_ARCH_ALPHA: name = "Alpha"; break; 266 case IH_ARCH_ARM: name = "ARM"; break; 267 case IH_ARCH_AVR32: name = "AVR32"; break; 268 case IH_ARCH_BLACKFIN: name = "Blackfin"; break; 269 case IH_ARCH_I386: name = "Intel x86"; break; 270 case IH_ARCH_IA64: name = "IA64"; break; 271 case IH_ARCH_M68K: name = "M68K"; break; 272 case IH_ARCH_MICROBLAZE:name = "Microblaze"; break; 273 case IH_ARCH_MIPS64: name = "MIPS 64 Bit"; break; 274 case IH_ARCH_MIPS: name = "MIPS"; break; 275 case IH_ARCH_NIOS2: name = "Nios-II"; break; 276 case IH_ARCH_NIOS: name = "Nios"; break; 277 case IH_ARCH_PPC: name = "PowerPC"; break; 278 case IH_ARCH_S390: name = "IBM S390"; break; 279 case IH_ARCH_SH: name = "SuperH"; break; 280 case IH_ARCH_SPARC64: name = "SPARC 64 Bit"; break; 281 case IH_ARCH_SPARC: name = "SPARC"; break; 282 default: name = "Unknown Architecture"; break; 283 } 284 285 return name; 286 } 287 288 const char* image_get_type_name (uint8_t type) 289 { 290 const char *name; 291 292 switch (type) { 293 case IH_TYPE_INVALID: name = "Invalid Image"; break; 294 case IH_TYPE_STANDALONE:name = "Standalone Program"; break; 295 case IH_TYPE_KERNEL: name = "Kernel Image"; break; 296 case IH_TYPE_RAMDISK: name = "RAMDisk Image"; break; 297 case IH_TYPE_MULTI: name = "Multi-File Image"; break; 298 case IH_TYPE_FIRMWARE: name = "Firmware"; break; 299 case IH_TYPE_SCRIPT: name = "Script"; break; 300 case IH_TYPE_FLATDT: name = "Flat Device Tree"; break; 301 default: name = "Unknown Image"; break; 302 } 303 304 return name; 305 } 306 307 const char* image_get_comp_name (uint8_t comp) 308 { 309 const char *name; 310 311 switch (comp) { 312 case IH_COMP_NONE: name = "uncompressed"; break; 313 case IH_COMP_GZIP: name = "gzip compressed"; break; 314 case IH_COMP_BZIP2: name = "bzip2 compressed"; break; 315 default: name = "unknown compression"; break; 316 } 317 318 return name; 319 } 320 321 static void image_print_type (image_header_t *hdr) 322 { 323 const char *os, *arch, *type, *comp; 324 325 os = image_get_os_name (image_get_os (hdr)); 326 arch = image_get_arch_name (image_get_arch (hdr)); 327 type = image_get_type_name (image_get_type (hdr)); 328 comp = image_get_comp_name (image_get_comp (hdr)); 329 330 printf ("%s %s %s (%s)", arch, os, type, comp); 331 } 332 333 void image_print_contents (image_header_t *hdr) 334 { 335 #if defined(CONFIG_TIMESTAMP) || defined(CONFIG_CMD_DATE) 336 time_t timestamp = (time_t)image_get_time (hdr); 337 struct rtc_time tm; 338 #endif 339 340 printf (" Image Name: %.*s\n", IH_NMLEN, image_get_name (hdr)); 341 342 #if defined(CONFIG_TIMESTAMP) || defined(CONFIG_CMD_DATE) 343 to_tm (timestamp, &tm); 344 printf (" Created: %4d-%02d-%02d %2d:%02d:%02d UTC\n", 345 tm.tm_year, tm.tm_mon, tm.tm_mday, 346 tm.tm_hour, tm.tm_min, tm.tm_sec); 347 #endif 348 puts (" Image Type: "); 349 image_print_type (hdr); 350 351 printf ("\n Data Size: %d Bytes = ", image_get_data_size (hdr)); 352 print_size (image_get_data_size (hdr), "\n"); 353 printf (" Load Address: %08x\n" 354 " Entry Point: %08x\n", 355 image_get_load (hdr), image_get_ep (hdr)); 356 357 if (image_check_type (hdr, IH_TYPE_MULTI)) { 358 int i; 359 ulong data, len; 360 ulong count = image_multi_count (hdr); 361 362 puts (" Contents:\n"); 363 for (i = 0; i < count; i++) { 364 image_multi_getimg (hdr, i, &data, &len); 365 printf (" Image %d: %8ld Bytes = ", i, len); 366 print_size (len, "\n"); 367 } 368 } 369 } 370 371 /** 372 * gen_image_get_format - get image format type 373 * @img_addr: image start address 374 * 375 * gen_image_get_format() checks whether provided address points to a valid 376 * legacy or FIT image. 377 * 378 * returns: 379 * image format type or IMAGE_FORMAT_INVALID if no image is present 380 */ 381 int gen_image_get_format (void *img_addr) 382 { 383 ulong format = IMAGE_FORMAT_INVALID; 384 image_header_t *hdr; 385 #if defined(CONFIG_FIT) 386 char *fit_hdr; 387 #endif 388 389 hdr = (image_header_t *)img_addr; 390 if (image_check_magic(hdr)) 391 format = IMAGE_FORMAT_LEGACY; 392 #if defined(CONFIG_FIT) 393 else { 394 fit_hdr = (char *)img_addr; 395 if (fdt_check_header (fit_hdr) == 0) 396 format = IMAGE_FORMAT_FIT; 397 } 398 #endif 399 400 return format; 401 } 402 403 /** 404 * gen_get_image - get image from special storage (if necessary) 405 * @img_addr: image start address 406 * 407 * gen_get_image() checks if provided image start adddress is located 408 * in a dataflash storage. If so, image is moved to a system RAM memory. 409 * 410 * returns: 411 * image start address after possible relocation from special storage 412 */ 413 ulong gen_get_image (ulong img_addr) 414 { 415 ulong ram_addr = img_addr; 416 417 #ifdef CONFIG_HAS_DATAFLASH 418 ulong h_size, d_size; 419 420 if (addr_dataflash (img_addr)){ 421 /* ger RAM address */ 422 ram_addr = CFG_LOAD_ADDR; 423 424 /* get header size */ 425 h_size = image_get_header_size (); 426 #if defined(CONFIG_FIT) 427 if (sizeof(struct fdt_header) > h_size) 428 h_size = sizeof(struct fdt_header); 429 #endif 430 431 /* read in header */ 432 debug (" Reading image header from dataflash address " 433 "%08lx to RAM address %08lx\n", img_addr, ram_addr); 434 435 read_dataflash (img_addr, h_size, (char *)ram_addr); 436 437 /* get data size */ 438 switch (gen_image_get_format ((void *)ram_addr)) { 439 case IMAGE_FORMAT_LEGACY: 440 d_size = image_get_data_size ((image_header_t *)ram_addr); 441 debug (" Legacy format image found at 0x%08lx, size 0x%08lx\n", 442 ram_addr, d_size); 443 break; 444 #if defined(CONFIG_FIT) 445 case IMAGE_FORMAT_FIT: 446 d_size = fdt_totalsize((void *)ram_addr) - h_size; 447 debug (" FIT/FDT format image found at 0x%08lx, size 0x%08lx\n", 448 ram_addr, d_size); 449 break; 450 #endif 451 default: 452 printf (" No valid image found at 0x%08lx\n", img_addr); 453 return ram_addr; 454 } 455 456 /* read in image data */ 457 debug (" Reading image remaining data from dataflash address " 458 "%08lx to RAM address %08lx\n", img_addr + h_size, 459 ram_addr + h_size); 460 461 read_dataflash (img_addr + h_size, d_size, 462 (char *)(ram_addr + h_size)); 463 464 } 465 #endif /* CONFIG_HAS_DATAFLASH */ 466 467 return ram_addr; 468 } 469 470 /** 471 * image_get_ramdisk - get and verify ramdisk image 472 * @cmdtp: command table pointer 473 * @flag: command flag 474 * @argc: command argument count 475 * @argv: command argument list 476 * @rd_addr: ramdisk image start address 477 * @arch: expected ramdisk architecture 478 * @verify: checksum verification flag 479 * 480 * image_get_ramdisk() returns a pointer to the verified ramdisk image 481 * header. Routine receives image start address and expected architecture 482 * flag. Verification done covers data and header integrity and os/type/arch 483 * fields checking. 484 * 485 * If dataflash support is enabled routine checks for dataflash addresses 486 * and handles required dataflash reads. 487 * 488 * returns: 489 * pointer to a ramdisk image header, if image was found and valid 490 * otherwise, board is reset 491 */ 492 static image_header_t* image_get_ramdisk (cmd_tbl_t *cmdtp, int flag, 493 int argc, char *argv[], 494 ulong rd_addr, uint8_t arch, int verify) 495 { 496 image_header_t *rd_hdr; 497 498 show_boot_progress (9); 499 rd_hdr = (image_header_t *)rd_addr; 500 501 if (!image_check_magic (rd_hdr)) { 502 puts ("Bad Magic Number\n"); 503 show_boot_progress (-10); 504 do_reset (cmdtp, flag, argc, argv); 505 } 506 507 if (!image_check_hcrc (rd_hdr)) { 508 puts ("Bad Header Checksum\n"); 509 show_boot_progress (-11); 510 do_reset (cmdtp, flag, argc, argv); 511 } 512 513 show_boot_progress (10); 514 image_print_contents (rd_hdr); 515 516 if (verify) { 517 puts(" Verifying Checksum ... "); 518 if (!image_check_dcrc_wd (rd_hdr, CHUNKSZ)) { 519 puts ("Bad Data CRC\n"); 520 show_boot_progress (-12); 521 do_reset (cmdtp, flag, argc, argv); 522 } 523 puts("OK\n"); 524 } 525 526 show_boot_progress (11); 527 528 if (!image_check_os (rd_hdr, IH_OS_LINUX) || 529 !image_check_arch (rd_hdr, arch) || 530 !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) { 531 printf ("No Linux %s Ramdisk Image\n", 532 image_get_arch_name(arch)); 533 show_boot_progress (-13); 534 do_reset (cmdtp, flag, argc, argv); 535 } 536 537 return rd_hdr; 538 } 539 540 /** 541 * get_ramdisk - main ramdisk handling routine 542 * @cmdtp: command table pointer 543 * @flag: command flag 544 * @argc: command argument count 545 * @argv: command argument list 546 * @images: pointer to the bootm images structure 547 * @arch: expected ramdisk architecture 548 * @rd_start: pointer to a ulong variable, will hold ramdisk start address 549 * @rd_end: pointer to a ulong variable, will hold ramdisk end 550 * 551 * get_ramdisk() is responsible for finding a valid ramdisk image. 552 * Curently supported are the following ramdisk sources: 553 * - multicomponent kernel/ramdisk image, 554 * - commandline provided address of decicated ramdisk image. 555 * 556 * returns: 557 * rd_start and rd_end are set to ramdisk start/end addresses if 558 * ramdisk image is found and valid 559 * rd_start and rd_end are set to 0 if no ramdisk exists 560 * board is reset if ramdisk image is found but corrupted 561 */ 562 void get_ramdisk (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], 563 bootm_headers_t *images, uint8_t arch, 564 ulong *rd_start, ulong *rd_end) 565 { 566 ulong rd_addr, rd_load; 567 ulong rd_data, rd_len; 568 image_header_t *rd_hdr; 569 #if defined(CONFIG_FIT) 570 void *fit_hdr; 571 const char *fit_uname_config = NULL; 572 const char *fit_uname_ramdisk = NULL; 573 ulong default_addr; 574 #endif 575 576 /* 577 * Look for a '-' which indicates to ignore the 578 * ramdisk argument 579 */ 580 if ((argc >= 3) && (strcmp(argv[2], "-") == 0)) { 581 debug ("## Skipping init Ramdisk\n"); 582 rd_len = rd_data = 0; 583 } else if (argc >= 3) { 584 #if defined(CONFIG_FIT) 585 /* 586 * If the init ramdisk comes from the FIT image and the FIT image 587 * address is omitted in the command line argument, try to use 588 * os FIT image address or default load address. 589 */ 590 if (images->fit_uname_os) 591 default_addr = (ulong)images->fit_hdr_os; 592 else 593 default_addr = load_addr; 594 595 if (fit_parse_conf (argv[2], default_addr, 596 &rd_addr, &fit_uname_config)) { 597 debug ("* ramdisk: config '%s' from image at 0x%08lx\n", 598 fit_uname_config, rd_addr); 599 } else if (fit_parse_subimage (argv[2], default_addr, 600 &rd_addr, &fit_uname_ramdisk)) { 601 debug ("* ramdisk: subimage '%s' from image at 0x%08lx\n", 602 fit_uname_ramdisk, rd_addr); 603 } else 604 #endif 605 { 606 rd_addr = simple_strtoul(argv[2], NULL, 16); 607 debug ("* ramdisk: cmdline image address = 0x%08lx\n", 608 rd_addr); 609 } 610 611 /* copy from dataflash if needed */ 612 printf ("## Loading init Ramdisk Image at %08lx ...\n", 613 rd_addr); 614 rd_addr = gen_get_image (rd_addr); 615 616 /* 617 * Check if there is an initrd image at the 618 * address provided in the second bootm argument 619 * check image type, for FIT images get FIT node. 620 */ 621 switch (gen_image_get_format ((void *)rd_addr)) { 622 case IMAGE_FORMAT_LEGACY: 623 624 debug ("* ramdisk: legacy format image\n"); 625 626 rd_hdr = image_get_ramdisk (cmdtp, flag, argc, argv, 627 rd_addr, arch, images->verify); 628 629 rd_data = image_get_data (rd_hdr); 630 rd_len = image_get_data_size (rd_hdr); 631 rd_load = image_get_load (rd_hdr); 632 break; 633 #if defined(CONFIG_FIT) 634 case IMAGE_FORMAT_FIT: 635 fit_hdr = (void *)rd_addr; 636 debug ("* ramdisk: FIT format image\n"); 637 fit_unsupported_reset ("ramdisk"); 638 do_reset (cmdtp, flag, argc, argv); 639 #endif 640 default: 641 printf ("Wrong Image Format for %s command\n", 642 cmdtp->name); 643 rd_data = rd_len = 0; 644 } 645 646 #if defined(CONFIG_B2) || defined(CONFIG_EVB4510) || defined(CONFIG_ARMADILLO) 647 /* 648 * We need to copy the ramdisk to SRAM to let Linux boot 649 */ 650 if (rd_data) { 651 memmove ((void *)rd_load, (uchar *)rd_data, rd_len); 652 rd_data = rd_load; 653 } 654 #endif /* CONFIG_B2 || CONFIG_EVB4510 || CONFIG_ARMADILLO */ 655 656 } else if (images->legacy_hdr_valid && 657 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) { 658 /* 659 * Now check if we have a legacy mult-component image, 660 * get second entry data start address and len. 661 */ 662 show_boot_progress (13); 663 printf ("## Loading init Ramdisk from multi component " 664 "Image at %08lx ...\n", 665 (ulong)images->legacy_hdr_os); 666 667 image_multi_getimg (images->legacy_hdr_os, 1, &rd_data, &rd_len); 668 } else { 669 /* 670 * no initrd image 671 */ 672 show_boot_progress (14); 673 rd_len = rd_data = 0; 674 } 675 676 if (!rd_data) { 677 debug ("## No init Ramdisk\n"); 678 *rd_start = 0; 679 *rd_end = 0; 680 } else { 681 *rd_start = rd_data; 682 *rd_end = rd_data + rd_len; 683 } 684 debug (" ramdisk start = 0x%08lx, ramdisk end = 0x%08lx\n", 685 *rd_start, *rd_end); 686 } 687 688 #if defined(CONFIG_PPC) || defined(CONFIG_M68K) 689 /** 690 * ramdisk_high - relocate init ramdisk 691 * @rd_data: ramdisk data start address 692 * @rd_len: ramdisk data length 693 * @kbd: kernel board info copy (within BOOTMAPSZ boundary) 694 * @sp_limit: stack pointer limit (including BOOTMAPSZ) 695 * @sp: current stack pointer 696 * @initrd_start: pointer to a ulong variable, will hold final init ramdisk 697 * start address (after possible relocation) 698 * @initrd_end: pointer to a ulong variable, will hold final init ramdisk 699 * end address (after possible relocation) 700 * 701 * ramdisk_high() takes a relocation hint from "initrd_high" environement 702 * variable and if requested ramdisk data is moved to a specified location. 703 * 704 * returns: 705 * - initrd_start and initrd_end are set to final (after relocation) ramdisk 706 * start/end addresses if ramdisk image start and len were provided 707 * otherwise set initrd_start and initrd_end set to zeros 708 * - returns new allc_current, next free address below BOOTMAPSZ 709 */ 710 ulong ramdisk_high (ulong alloc_current, ulong rd_data, ulong rd_len, 711 bd_t *kbd, ulong sp_limit, ulong sp, 712 ulong *initrd_start, ulong *initrd_end) 713 { 714 char *s; 715 ulong initrd_high; 716 int initrd_copy_to_ram = 1; 717 ulong new_alloc_current = alloc_current; 718 719 if ((s = getenv ("initrd_high")) != NULL) { 720 /* a value of "no" or a similar string will act like 0, 721 * turning the "load high" feature off. This is intentional. 722 */ 723 initrd_high = simple_strtoul (s, NULL, 16); 724 if (initrd_high == ~0) 725 initrd_copy_to_ram = 0; 726 } else { 727 /* not set, no restrictions to load high */ 728 initrd_high = ~0; 729 } 730 731 #ifdef CONFIG_LOGBUFFER 732 /* Prevent initrd from overwriting logbuffer */ 733 if (initrd_high < (kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD)) 734 initrd_high = kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD; 735 debug ("## Logbuffer at 0x%08lx ", kbd->bi_memsize - LOGBUFF_LEN); 736 #endif 737 debug ("## initrd_high = 0x%08lx, copy_to_ram = %d\n", 738 initrd_high, initrd_copy_to_ram); 739 740 if (rd_data) { 741 if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */ 742 debug (" in-place initrd\n"); 743 *initrd_start = rd_data; 744 *initrd_end = rd_data + rd_len; 745 } else { 746 new_alloc_current = alloc_current - rd_len; 747 *initrd_start = new_alloc_current; 748 *initrd_start &= ~(4096 - 1); /* align on page */ 749 750 if (initrd_high) { 751 ulong nsp; 752 753 /* 754 * the inital ramdisk does not need to be within 755 * CFG_BOOTMAPSZ as it is not accessed until after 756 * the mm system is initialised. 757 * 758 * do the stack bottom calculation again and see if 759 * the initrd will fit just below the monitor stack 760 * bottom without overwriting the area allocated 761 * for command line args and board info. 762 */ 763 nsp = sp; 764 nsp -= 2048; /* just to be sure */ 765 nsp &= ~0xF; 766 767 if (nsp > initrd_high) /* limit as specified */ 768 nsp = initrd_high; 769 770 nsp -= rd_len; 771 nsp &= ~(4096 - 1); /* align on page */ 772 773 if (nsp >= sp_limit) { 774 *initrd_start = nsp; 775 new_alloc_current = alloc_current; 776 } 777 } 778 779 show_boot_progress (12); 780 781 *initrd_end = *initrd_start + rd_len; 782 printf (" Loading Ramdisk to %08lx, end %08lx ... ", 783 *initrd_start, *initrd_end); 784 785 memmove_wd((void *)*initrd_start, 786 (void *)rd_data, rd_len, CHUNKSZ); 787 788 puts ("OK\n"); 789 } 790 } else { 791 *initrd_start = 0; 792 *initrd_end = 0; 793 } 794 debug (" ramdisk load start = 0x%08lx, ramdisk load end = 0x%08lx\n", 795 *initrd_start, *initrd_end); 796 797 return new_alloc_current; 798 } 799 800 /** 801 * get_boot_sp_limit - calculate stack pointer limit 802 * @sp: current stack pointer 803 * 804 * get_boot_sp_limit() takes current stack pointer adrress and calculates 805 * stack pointer limit, below which kernel boot data (cmdline, board info, 806 * etc.) will be allocated. 807 * 808 * returns: 809 * stack pointer limit 810 */ 811 ulong get_boot_sp_limit(ulong sp) 812 { 813 ulong sp_limit = sp; 814 815 sp_limit -= 2048; /* just to be sure */ 816 817 /* make sure sp_limit is within kernel mapped space */ 818 if (sp_limit > CFG_BOOTMAPSZ) 819 sp_limit = CFG_BOOTMAPSZ; 820 sp_limit &= ~0xF; 821 822 return sp_limit; 823 } 824 825 /** 826 * get_boot_cmdline - allocate and initialize kernel cmdline 827 * @alloc_current: current boot allocation address (counting down 828 * from sp_limit) 829 * @cmd_start: pointer to a ulong variable, will hold cmdline start 830 * @cmd_end: pointer to a ulong variable, will hold cmdline end 831 * 832 * get_boot_cmdline() allocates space for kernel command line below 833 * provided alloc_current address. If "bootargs" U-boot environemnt 834 * variable is present its contents is copied to allocated kernel 835 * command line. 836 * 837 * returns: 838 * alloc_current after cmdline allocation 839 */ 840 ulong get_boot_cmdline (ulong alloc_current, ulong *cmd_start, ulong *cmd_end) 841 { 842 char *cmdline; 843 char *s; 844 845 cmdline = (char *)((alloc_current - CFG_BARGSIZE) & ~0xF); 846 847 if ((s = getenv("bootargs")) == NULL) 848 s = ""; 849 850 strcpy(cmdline, s); 851 852 *cmd_start = (ulong) & cmdline[0]; 853 *cmd_end = *cmd_start + strlen(cmdline); 854 855 debug ("## cmdline at 0x%08lx ... 0x%08lx\n", *cmd_start, *cmd_end); 856 857 return (ulong)cmdline; 858 } 859 860 /** 861 * get_boot_kbd - allocate and initialize kernel copy of board info 862 * @alloc_current: current boot allocation address (counting down 863 * from sp_limit) 864 * @kbd: double pointer to board info data 865 * 866 * get_boot_kbd() - allocates space for kernel copy of board info data. 867 * Space is allocated below provided alloc_current address and kernel 868 * board info is initialized with the current u-boot board info data. 869 * 870 * returns: 871 * alloc_current after kbd allocation 872 */ 873 ulong get_boot_kbd (ulong alloc_current, bd_t **kbd) 874 { 875 *kbd = (bd_t *) (((ulong)alloc_current - sizeof(bd_t)) & ~0xF); 876 **kbd = *(gd->bd); 877 878 debug ("## kernel board info at 0x%08lx\n", (ulong)*kbd); 879 880 #if defined(DEBUG) && defined(CONFIG_CMD_BDI) 881 do_bdinfo(NULL, 0, 0, NULL); 882 #endif 883 884 return (ulong)*kbd; 885 } 886 #endif /* CONFIG_PPC || CONFIG_M68K */ 887 888 #if defined(CONFIG_FIT) 889 /*****************************************************************************/ 890 /* New uImage format routines */ 891 /*****************************************************************************/ 892 static int fit_parse_spec (const char *spec, char sepc, ulong addr_curr, 893 ulong *addr, const char **name) 894 { 895 const char *sep; 896 897 *addr = addr_curr; 898 *name = NULL; 899 900 sep = strchr (spec, sepc); 901 if (sep) { 902 if (sep - spec > 0) 903 *addr = simple_strtoul (spec, NULL, 16); 904 905 *name = sep + 1; 906 return 1; 907 } 908 909 return 0; 910 } 911 912 /** 913 * fit_parse_conf - parse FIT configuration spec 914 * @spec: input string, containing configuration spec 915 * @add_curr: current image address (to be used as a possible default) 916 * @addr: pointer to a ulong variable, will hold FIT image address of a given 917 * configuration 918 * @conf_name double pointer to a char, will hold pointer to a configuration 919 * unit name 920 * 921 * fit_parse_conf() expects configuration spec in the for of [<addr>]#<conf>, 922 * where <addr> is a FIT image address that contains configuration 923 * with a <conf> unit name. 924 * 925 * Address part is optional, and if omitted default add_curr will 926 * be used instead. 927 * 928 * returns: 929 * 1 if spec is a valid configuration string, 930 * addr and conf_name are set accordingly 931 * 0 otherwise 932 */ 933 inline int fit_parse_conf (const char *spec, ulong addr_curr, 934 ulong *addr, const char **conf_name) 935 { 936 return fit_parse_spec (spec, '#', addr_curr, addr, conf_name); 937 } 938 939 /** 940 * fit_parse_subimage - parse FIT subimage spec 941 * @spec: input string, containing subimage spec 942 * @add_curr: current image address (to be used as a possible default) 943 * @addr: pointer to a ulong variable, will hold FIT image address of a given 944 * subimage 945 * @image_name: double pointer to a char, will hold pointer to a subimage name 946 * 947 * fit_parse_subimage() expects subimage spec in the for of 948 * [<addr>]:<subimage>, where <addr> is a FIT image address that contains 949 * subimage with a <subimg> unit name. 950 * 951 * Address part is optional, and if omitted default add_curr will 952 * be used instead. 953 * 954 * returns: 955 * 1 if spec is a valid subimage string, 956 * addr and image_name are set accordingly 957 * 0 otherwise 958 */ 959 inline int fit_parse_subimage (const char *spec, ulong addr_curr, 960 ulong *addr, const char **image_name) 961 { 962 return fit_parse_spec (spec, ':', addr_curr, addr, image_name); 963 } 964 965 #endif /* CONFIG_FIT */ 966 967 #endif /* USE_HOSTCC */ 968