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_FIT) 45 #include <fdt.h> 46 #include <libfdt.h> 47 #include <fdt_support.h> 48 #endif 49 50 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 51 52 #ifdef CONFIG_CMD_BDI 53 extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 54 #endif 55 56 DECLARE_GLOBAL_DATA_PTR; 57 #else 58 #include "mkimage.h" 59 #endif /* USE_HOSTCC*/ 60 61 #include <image.h> 62 63 unsigned long crc32 (unsigned long, const unsigned char *, unsigned int); 64 65 int image_check_hcrc (image_header_t *hdr) 66 { 67 ulong hcrc; 68 ulong len = image_get_header_size (); 69 image_header_t header; 70 71 /* Copy header so we can blank CRC field for re-calculation */ 72 memmove (&header, (char *)hdr, image_get_header_size ()); 73 image_set_hcrc (&header, 0); 74 75 hcrc = crc32 (0, (unsigned char *)&header, len); 76 77 return (hcrc == image_get_hcrc (hdr)); 78 } 79 80 int image_check_dcrc (image_header_t *hdr) 81 { 82 ulong data = image_get_data (hdr); 83 ulong len = image_get_data_size (hdr); 84 ulong dcrc = crc32 (0, (unsigned char *)data, len); 85 86 return (dcrc == image_get_dcrc (hdr)); 87 } 88 89 #ifndef USE_HOSTCC 90 int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz) 91 { 92 ulong dcrc = 0; 93 ulong len = image_get_data_size (hdr); 94 ulong data = image_get_data (hdr); 95 96 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) 97 ulong cdata = data; 98 ulong edata = cdata + len; 99 100 while (cdata < edata) { 101 ulong chunk = edata - cdata; 102 103 if (chunk > chunksz) 104 chunk = chunksz; 105 dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk); 106 cdata += chunk; 107 108 WATCHDOG_RESET (); 109 } 110 #else 111 dcrc = crc32 (0, (unsigned char *)data, len); 112 #endif 113 114 return (dcrc == image_get_dcrc (hdr)); 115 } 116 117 int getenv_verify (void) 118 { 119 char *s = getenv ("verify"); 120 return (s && (*s == 'n')) ? 0 : 1; 121 } 122 123 void memmove_wd (void *to, void *from, size_t len, ulong chunksz) 124 { 125 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) 126 while (len > 0) { 127 size_t tail = (len > chunksz) ? chunksz : len; 128 WATCHDOG_RESET (); 129 memmove (to, from, tail); 130 to += tail; 131 from += tail; 132 len -= tail; 133 } 134 #else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */ 135 memmove (to, from, len); 136 #endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */ 137 } 138 #endif /* USE_HOSTCC */ 139 140 /** 141 * image_multi_count - get component (sub-image) count 142 * @hdr: pointer to the header of the multi component image 143 * 144 * image_multi_count() returns number of components in a multi 145 * component image. 146 * 147 * Note: no checking of the image type is done, caller must pass 148 * a valid multi component image. 149 * 150 * returns: 151 * number of components 152 */ 153 ulong image_multi_count (image_header_t *hdr) 154 { 155 ulong i, count = 0; 156 ulong *size; 157 158 /* get start of the image payload, which in case of multi 159 * component images that points to a table of component sizes */ 160 size = (ulong *)image_get_data (hdr); 161 162 /* count non empty slots */ 163 for (i = 0; size[i]; ++i) 164 count++; 165 166 return count; 167 } 168 169 /** 170 * image_multi_getimg - get component data address and size 171 * @hdr: pointer to the header of the multi component image 172 * @idx: index of the requested component 173 * @data: pointer to a ulong variable, will hold component data address 174 * @len: pointer to a ulong variable, will hold component size 175 * 176 * image_multi_getimg() returns size and data address for the requested 177 * component in a multi component image. 178 * 179 * Note: no checking of the image type is done, caller must pass 180 * a valid multi component image. 181 * 182 * returns: 183 * data address and size of the component, if idx is valid 184 * 0 in data and len, if idx is out of range 185 */ 186 void image_multi_getimg (image_header_t *hdr, ulong idx, 187 ulong *data, ulong *len) 188 { 189 int i; 190 ulong *size; 191 ulong offset, tail, count, img_data; 192 193 /* get number of component */ 194 count = image_multi_count (hdr); 195 196 /* get start of the image payload, which in case of multi 197 * component images that points to a table of component sizes */ 198 size = (ulong *)image_get_data (hdr); 199 200 /* get address of the proper component data start, which means 201 * skipping sizes table (add 1 for last, null entry) */ 202 img_data = image_get_data (hdr) + (count + 1) * sizeof (ulong); 203 204 if (idx < count) { 205 *len = size[idx]; 206 offset = 0; 207 tail = 0; 208 209 /* go over all indices preceding requested component idx */ 210 for (i = 0; i < idx; i++) { 211 /* add up i-th component size */ 212 offset += size[i]; 213 214 /* add up alignment for i-th component */ 215 tail += (4 - size[i] % 4); 216 } 217 218 /* calculate idx-th component data address */ 219 *data = img_data + offset + tail; 220 } else { 221 *len = 0; 222 *data = 0; 223 } 224 } 225 226 #ifndef USE_HOSTCC 227 const char* image_get_os_name (uint8_t os) 228 { 229 const char *name; 230 231 switch (os) { 232 case IH_OS_INVALID: name = "Invalid OS"; break; 233 case IH_OS_NETBSD: name = "NetBSD"; break; 234 case IH_OS_LINUX: name = "Linux"; break; 235 case IH_OS_VXWORKS: name = "VxWorks"; break; 236 case IH_OS_QNX: name = "QNX"; break; 237 case IH_OS_U_BOOT: name = "U-Boot"; break; 238 case IH_OS_RTEMS: name = "RTEMS"; break; 239 #ifdef CONFIG_ARTOS 240 case IH_OS_ARTOS: name = "ARTOS"; break; 241 #endif 242 #ifdef CONFIG_LYNXKDI 243 case IH_OS_LYNXOS: name = "LynxOS"; break; 244 #endif 245 default: name = "Unknown OS"; break; 246 } 247 248 return name; 249 } 250 251 const char* image_get_arch_name (uint8_t arch) 252 { 253 const char *name; 254 255 switch (arch) { 256 case IH_ARCH_INVALID: name = "Invalid Architecture"; break; 257 case IH_ARCH_ALPHA: name = "Alpha"; break; 258 case IH_ARCH_ARM: name = "ARM"; break; 259 case IH_ARCH_AVR32: name = "AVR32"; break; 260 case IH_ARCH_BLACKFIN: name = "Blackfin"; break; 261 case IH_ARCH_I386: name = "Intel x86"; break; 262 case IH_ARCH_IA64: name = "IA64"; break; 263 case IH_ARCH_M68K: name = "M68K"; break; 264 case IH_ARCH_MICROBLAZE:name = "Microblaze"; break; 265 case IH_ARCH_MIPS64: name = "MIPS 64 Bit"; break; 266 case IH_ARCH_MIPS: name = "MIPS"; break; 267 case IH_ARCH_NIOS2: name = "Nios-II"; break; 268 case IH_ARCH_NIOS: name = "Nios"; break; 269 case IH_ARCH_PPC: name = "PowerPC"; break; 270 case IH_ARCH_S390: name = "IBM S390"; break; 271 case IH_ARCH_SH: name = "SuperH"; break; 272 case IH_ARCH_SPARC64: name = "SPARC 64 Bit"; break; 273 case IH_ARCH_SPARC: name = "SPARC"; break; 274 default: name = "Unknown Architecture"; break; 275 } 276 277 return name; 278 } 279 280 const char* image_get_type_name (uint8_t type) 281 { 282 const char *name; 283 284 switch (type) { 285 case IH_TYPE_INVALID: name = "Invalid Image"; break; 286 case IH_TYPE_STANDALONE:name = "Standalone Program"; break; 287 case IH_TYPE_KERNEL: name = "Kernel Image"; break; 288 case IH_TYPE_RAMDISK: name = "RAMDisk Image"; break; 289 case IH_TYPE_MULTI: name = "Multi-File Image"; break; 290 case IH_TYPE_FIRMWARE: name = "Firmware"; break; 291 case IH_TYPE_SCRIPT: name = "Script"; break; 292 case IH_TYPE_FLATDT: name = "Flat Device Tree"; break; 293 default: name = "Unknown Image"; break; 294 } 295 296 return name; 297 } 298 299 const char* image_get_comp_name (uint8_t comp) 300 { 301 const char *name; 302 303 switch (comp) { 304 case IH_COMP_NONE: name = "uncompressed"; break; 305 case IH_COMP_GZIP: name = "gzip compressed"; break; 306 case IH_COMP_BZIP2: name = "bzip2 compressed"; break; 307 default: name = "unknown compression"; break; 308 } 309 310 return name; 311 } 312 313 /** 314 * gen_image_get_format - get image format type 315 * @img_addr: image start address 316 * 317 * gen_image_get_format() checks whether provided address points to a valid 318 * legacy or FIT image. 319 * 320 * returns: 321 * image format type or IMAGE_FORMAT_INVALID if no image is present 322 */ 323 int gen_image_get_format (void *img_addr) 324 { 325 ulong format = IMAGE_FORMAT_INVALID; 326 image_header_t *hdr; 327 #if defined(CONFIG_FIT) 328 char *fit_hdr; 329 #endif 330 331 hdr = (image_header_t *)img_addr; 332 if (image_check_magic(hdr)) 333 format = IMAGE_FORMAT_LEGACY; 334 #if defined(CONFIG_FIT) 335 else { 336 fit_hdr = (char *)img_addr; 337 if (fdt_check_header (fit_hdr) == 0) 338 format = IMAGE_FORMAT_FIT; 339 } 340 #endif 341 342 return format; 343 } 344 345 /** 346 * gen_get_image - get image from special storage (if necessary) 347 * @img_addr: image start address 348 * 349 * gen_get_image() checks if provided image start adddress is located 350 * in a dataflash storage. If so, image is moved to a system RAM memory. 351 * 352 * returns: 353 * image start address after possible relocation from special storage 354 */ 355 ulong gen_get_image (ulong img_addr) 356 { 357 ulong ram_addr, h_size, d_size; 358 359 h_size = image_get_header_size (); 360 #if defined(CONFIG_FIT) 361 if (sizeof(struct fdt_header) > h_size) 362 h_size = sizeof(struct fdt_header); 363 #endif 364 365 #ifdef CONFIG_HAS_DATAFLASH 366 if (addr_dataflash (img_addr)){ 367 ram_addr = CFG_LOAD_ADDR; 368 debug (" Reading image header from dataflash address " 369 "%08lx to RAM address %08lx\n", img_addr, ram_addr); 370 read_dataflash (img_addr, h_size, (char *)ram_addr); 371 } else 372 #endif 373 return img_addr; 374 375 ram_addr = img_addr; 376 377 switch (gen_image_get_format ((void *)ram_addr)) { 378 case IMAGE_FORMAT_LEGACY: 379 d_size = image_get_data_size ((image_header_t *)ram_addr); 380 debug (" Legacy format image found at 0x%08lx, size 0x%08lx\n", 381 ram_addr, d_size); 382 break; 383 #if defined(CONFIG_FIT) 384 case IMAGE_FORMAT_FIT: 385 d_size = fdt_totalsize((void *)ram_addr) - h_size; 386 debug (" FIT/FDT format image found at 0x%08lx, size 0x%08lx\n", 387 ram_addr, d_size); 388 389 break; 390 #endif 391 default: 392 printf (" No valid image found at 0x%08lx\n", img_addr); 393 return ram_addr; 394 } 395 396 #ifdef CONFIG_HAS_DATAFLASH 397 if (addr_dataflash (img_addr)) { 398 debug (" Reading image remaining data from dataflash address " 399 "%08lx to RAM address %08lx\n", img_addr + h_size, 400 ram_addr + h_size); 401 402 read_dataflash (img_addr + h_size, d_size, 403 (char *)(ram_addr + h_size)); 404 } 405 #endif 406 407 return ram_addr; 408 } 409 410 /** 411 * image_get_ramdisk - get and verify ramdisk image 412 * @cmdtp: command table pointer 413 * @flag: command flag 414 * @argc: command argument count 415 * @argv: command argument list 416 * @rd_addr: ramdisk image start address 417 * @arch: expected ramdisk architecture 418 * @verify: checksum verification flag 419 * 420 * image_get_ramdisk() returns a pointer to the verified ramdisk image 421 * header. Routine receives image start address and expected architecture 422 * flag. Verification done covers data and header integrity and os/type/arch 423 * fields checking. 424 * 425 * If dataflash support is enabled routine checks for dataflash addresses 426 * and handles required dataflash reads. 427 * 428 * returns: 429 * pointer to a ramdisk image header, if image was found and valid 430 * otherwise, board is reset 431 */ 432 image_header_t* image_get_ramdisk (cmd_tbl_t *cmdtp, int flag, 433 int argc, char *argv[], 434 ulong rd_addr, uint8_t arch, int verify) 435 { 436 image_header_t *rd_hdr; 437 438 show_boot_progress (9); 439 440 /* copy from dataflash if needed */ 441 rd_addr = gen_get_image (rd_addr); 442 rd_hdr = (image_header_t *)rd_addr; 443 444 if (!image_check_magic (rd_hdr)) { 445 puts ("Bad Magic Number\n"); 446 show_boot_progress (-10); 447 do_reset (cmdtp, flag, argc, argv); 448 } 449 450 if (!image_check_hcrc (rd_hdr)) { 451 puts ("Bad Header Checksum\n"); 452 show_boot_progress (-11); 453 do_reset (cmdtp, flag, argc, argv); 454 } 455 456 show_boot_progress (10); 457 print_image_hdr (rd_hdr); 458 459 if (verify) { 460 puts(" Verifying Checksum ... "); 461 if (!image_check_dcrc_wd (rd_hdr, CHUNKSZ)) { 462 puts ("Bad Data CRC\n"); 463 show_boot_progress (-12); 464 do_reset (cmdtp, flag, argc, argv); 465 } 466 puts("OK\n"); 467 } 468 469 show_boot_progress (11); 470 471 if (!image_check_os (rd_hdr, IH_OS_LINUX) || 472 !image_check_arch (rd_hdr, arch) || 473 !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) { 474 printf ("No Linux %s Ramdisk Image\n", 475 image_get_arch_name(arch)); 476 show_boot_progress (-13); 477 do_reset (cmdtp, flag, argc, argv); 478 } 479 480 return rd_hdr; 481 } 482 483 /** 484 * get_ramdisk - main ramdisk handling routine 485 * @cmdtp: command table pointer 486 * @flag: command flag 487 * @argc: command argument count 488 * @argv: command argument list 489 * @hdr: pointer to the posiibly multi componet kernel image 490 * @verify: checksum verification flag 491 * @arch: expected ramdisk architecture 492 * @rd_start: pointer to a ulong variable, will hold ramdisk start address 493 * @rd_end: pointer to a ulong variable, will hold ramdisk end 494 * 495 * get_ramdisk() is responsible for finding a valid ramdisk image. 496 * Curently supported are the following ramdisk sources: 497 * - multicomponent kernel/ramdisk image, 498 * - commandline provided address of decicated ramdisk image. 499 * 500 * returns: 501 * rd_start and rd_end are set to ramdisk start/end addresses if 502 * ramdisk image is found and valid 503 * rd_start and rd_end are set to 0 if no ramdisk exists 504 * board is reset if ramdisk image is found but corrupted 505 */ 506 void get_ramdisk (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], 507 image_header_t *hdr, int verify, uint8_t arch, 508 ulong *rd_start, ulong *rd_end) 509 { 510 ulong rd_addr; 511 ulong rd_data, rd_len; 512 image_header_t *rd_hdr; 513 514 if (argc >= 3) { 515 /* 516 * Look for a '-' which indicates to ignore the 517 * ramdisk argument 518 */ 519 if (strcmp(argv[2], "-") == 0) { 520 debug ("## Skipping init Ramdisk\n"); 521 rd_len = rd_data = 0; 522 } else { 523 /* 524 * Check if there is an initrd image at the 525 * address provided in the second bootm argument 526 */ 527 rd_addr = simple_strtoul (argv[2], NULL, 16); 528 printf ("## Loading init Ramdisk Image at %08lx ...\n", 529 rd_addr); 530 531 rd_hdr = image_get_ramdisk (cmdtp, flag, argc, argv, 532 rd_addr, arch, verify); 533 534 rd_data = image_get_data (rd_hdr); 535 rd_len = image_get_data_size (rd_hdr); 536 537 #if defined(CONFIG_B2) || defined(CONFIG_EVB4510) || defined(CONFIG_ARMADILLO) 538 /* 539 *we need to copy the ramdisk to SRAM to let Linux boot 540 */ 541 memmove ((void *)image_get_load (rd_hdr), 542 (uchar *)rd_data, rd_len); 543 544 rd_data = image_get_load (rd_hdr); 545 #endif /* CONFIG_B2 || CONFIG_EVB4510 || CONFIG_ARMADILLO */ 546 } 547 548 } else if (image_check_type (hdr, IH_TYPE_MULTI)) { 549 /* 550 * Now check if we have a multifile image 551 * Get second entry data start address and len 552 */ 553 show_boot_progress (13); 554 printf ("## Loading init Ramdisk from multi component " 555 "Image at %08lx ...\n", (ulong)hdr); 556 image_multi_getimg (hdr, 1, &rd_data, &rd_len); 557 } else { 558 /* 559 * no initrd image 560 */ 561 show_boot_progress (14); 562 rd_len = rd_data = 0; 563 } 564 565 if (!rd_data) { 566 debug ("## No init Ramdisk\n"); 567 *rd_start = 0; 568 *rd_end = 0; 569 } else { 570 *rd_start = rd_data; 571 *rd_end = rd_data + rd_len; 572 } 573 debug (" ramdisk start = 0x%08lx, ramdisk end = 0x%08lx\n", 574 *rd_start, *rd_end); 575 } 576 577 #if defined(CONFIG_PPC) || defined(CONFIG_M68K) 578 /** 579 * ramdisk_high - relocate init ramdisk 580 * @rd_data: ramdisk data start address 581 * @rd_len: ramdisk data length 582 * @kbd: kernel board info copy (within BOOTMAPSZ boundary) 583 * @sp_limit: stack pointer limit (including BOOTMAPSZ) 584 * @sp: current stack pointer 585 * @initrd_start: pointer to a ulong variable, will hold final init ramdisk 586 * start address (after possible relocation) 587 * @initrd_end: pointer to a ulong variable, will hold final init ramdisk 588 * end address (after possible relocation) 589 * 590 * ramdisk_high() takes a relocation hint from "initrd_high" environement 591 * variable and if requested ramdisk data is moved to a specified location. 592 * 593 * returns: 594 * - initrd_start and initrd_end are set to final (after relocation) ramdisk 595 * start/end addresses if ramdisk image start and len were provided 596 * otherwise set initrd_start and initrd_end set to zeros 597 * - returns new allc_current, next free address below BOOTMAPSZ 598 */ 599 ulong ramdisk_high (ulong alloc_current, ulong rd_data, ulong rd_len, 600 bd_t *kbd, ulong sp_limit, ulong sp, 601 ulong *initrd_start, ulong *initrd_end) 602 { 603 char *s; 604 ulong initrd_high; 605 int initrd_copy_to_ram = 1; 606 ulong new_alloc_current = alloc_current; 607 608 if ((s = getenv ("initrd_high")) != NULL) { 609 /* a value of "no" or a similar string will act like 0, 610 * turning the "load high" feature off. This is intentional. 611 */ 612 initrd_high = simple_strtoul (s, NULL, 16); 613 if (initrd_high == ~0) 614 initrd_copy_to_ram = 0; 615 } else { 616 /* not set, no restrictions to load high */ 617 initrd_high = ~0; 618 } 619 620 #ifdef CONFIG_LOGBUFFER 621 /* Prevent initrd from overwriting logbuffer */ 622 if (initrd_high < (kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD)) 623 initrd_high = kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD; 624 debug ("## Logbuffer at 0x%08lx ", kbd->bi_memsize - LOGBUFF_LEN); 625 #endif 626 debug ("## initrd_high = 0x%08lx, copy_to_ram = %d\n", 627 initrd_high, initrd_copy_to_ram); 628 629 if (rd_data) { 630 if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */ 631 debug (" in-place initrd\n"); 632 *initrd_start = rd_data; 633 *initrd_end = rd_data + rd_len; 634 } else { 635 new_alloc_current = alloc_current - rd_len; 636 *initrd_start = new_alloc_current; 637 *initrd_start &= ~(4096 - 1); /* align on page */ 638 639 if (initrd_high) { 640 ulong nsp; 641 642 /* 643 * the inital ramdisk does not need to be within 644 * CFG_BOOTMAPSZ as it is not accessed until after 645 * the mm system is initialised. 646 * 647 * do the stack bottom calculation again and see if 648 * the initrd will fit just below the monitor stack 649 * bottom without overwriting the area allocated 650 * for command line args and board info. 651 */ 652 nsp = sp; 653 nsp -= 2048; /* just to be sure */ 654 nsp &= ~0xF; 655 656 if (nsp > initrd_high) /* limit as specified */ 657 nsp = initrd_high; 658 659 nsp -= rd_len; 660 nsp &= ~(4096 - 1); /* align on page */ 661 662 if (nsp >= sp_limit) { 663 *initrd_start = nsp; 664 new_alloc_current = alloc_current; 665 } 666 } 667 668 show_boot_progress (12); 669 670 *initrd_end = *initrd_start + rd_len; 671 printf (" Loading Ramdisk to %08lx, end %08lx ... ", 672 *initrd_start, *initrd_end); 673 674 memmove_wd((void *)*initrd_start, 675 (void *)rd_data, rd_len, CHUNKSZ); 676 677 puts ("OK\n"); 678 } 679 } else { 680 *initrd_start = 0; 681 *initrd_end = 0; 682 } 683 debug (" ramdisk load start = 0x%08lx, ramdisk load end = 0x%08lx\n", 684 *initrd_start, *initrd_end); 685 686 return new_alloc_current; 687 } 688 689 /** 690 * get_boot_sp_limit - calculate stack pointer limit 691 * @sp: current stack pointer 692 * 693 * get_boot_sp_limit() takes current stack pointer adrress and calculates 694 * stack pointer limit, below which kernel boot data (cmdline, board info, 695 * etc.) will be allocated. 696 * 697 * returns: 698 * stack pointer limit 699 */ 700 ulong get_boot_sp_limit(ulong sp) 701 { 702 ulong sp_limit = sp; 703 704 sp_limit -= 2048; /* just to be sure */ 705 706 /* make sure sp_limit is within kernel mapped space */ 707 if (sp_limit > CFG_BOOTMAPSZ) 708 sp_limit = CFG_BOOTMAPSZ; 709 sp_limit &= ~0xF; 710 711 return sp_limit; 712 } 713 714 /** 715 * get_boot_cmdline - allocate and initialize kernel cmdline 716 * @alloc_current: current boot allocation address (counting down 717 * from sp_limit) 718 * @cmd_start: pointer to a ulong variable, will hold cmdline start 719 * @cmd_end: pointer to a ulong variable, will hold cmdline end 720 * 721 * get_boot_cmdline() allocates space for kernel command line below 722 * provided alloc_current address. If "bootargs" U-boot environemnt 723 * variable is present its contents is copied to allocated kernel 724 * command line. 725 * 726 * returns: 727 * alloc_current after cmdline allocation 728 */ 729 ulong get_boot_cmdline (ulong alloc_current, ulong *cmd_start, ulong *cmd_end) 730 { 731 char *cmdline; 732 char *s; 733 734 cmdline = (char *)((alloc_current - CFG_BARGSIZE) & ~0xF); 735 736 if ((s = getenv("bootargs")) == NULL) 737 s = ""; 738 739 strcpy(cmdline, s); 740 741 *cmd_start = (ulong) & cmdline[0]; 742 *cmd_end = *cmd_start + strlen(cmdline); 743 744 debug ("## cmdline at 0x%08lx ... 0x%08lx\n", *cmd_start, *cmd_end); 745 746 return (ulong)cmdline; 747 } 748 749 /** 750 * get_boot_kbd - allocate and initialize kernel copy of board info 751 * @alloc_current: current boot allocation address (counting down 752 * from sp_limit) 753 * @kbd: double pointer to board info data 754 * 755 * get_boot_kbd() - allocates space for kernel copy of board info data. 756 * Space is allocated below provided alloc_current address and kernel 757 * board info is initialized with the current u-boot board info data. 758 * 759 * returns: 760 * alloc_current after kbd allocation 761 */ 762 ulong get_boot_kbd (ulong alloc_current, bd_t **kbd) 763 { 764 *kbd = (bd_t *) (((ulong)alloc_current - sizeof(bd_t)) & ~0xF); 765 **kbd = *(gd->bd); 766 767 debug ("## kernel board info at 0x%08lx\n", (ulong)*kbd); 768 769 #if defined(DEBUG) && defined(CONFIG_CMD_BDI) 770 do_bdinfo(NULL, 0, 0, NULL); 771 #endif 772 773 return (ulong)*kbd; 774 } 775 #endif /* CONFIG_PPC || CONFIG_M68K */ 776 777 #endif /* USE_HOSTCC */ 778