lib_ppc/bootm.c

   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 #include <common.h>
  29 #include <watchdog.h>
  30 #include <command.h>
  31 #include <image.h>
  32 #include <malloc.h>
  33 #include <zlib.h>
  34 #include <bzlib.h>
  35 #include <environment.h>
  36 #include <asm/byteorder.h>
  37
  38 #if defined(CONFIG_OF_LIBFDT)
  39 #include <fdt.h>
  40 #include <libfdt.h>
  41 #include <fdt_support.h>
  42
  43 static void fdt_error (const char *msg);
  44 static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  45                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
  46 static int fdt_relocate (struct lmb *lmb, ulong bootmap_base,
  47                 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  48                 char **of_flat_tree, ulong *of_size);
  49 #endif
  50
  51 #ifdef CFG_INIT_RAM_LOCK
  52 #include <asm/cache.h>
  53 #endif
  54
  55 DECLARE_GLOBAL_DATA_PTR;
  56
  57 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  58 extern ulong get_effective_memsize(void);
  59 static ulong get_sp (void);
  60 static void set_clocks_in_mhz (bd_t *kbd);
  61
  62 void  __attribute__((noinline))
  63 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  64                 bootm_headers_t *images)
  65 {
  66         ulong   sp;
  67
  68         ulong   initrd_start, initrd_end;
  69         ulong   rd_data_start, rd_data_end, rd_len;
  70
  71         ulong   cmd_start, cmd_end, bootmap_base;
  72         bd_t    *kbd;
  73         ulong   ep = 0;
  74         void    (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
  75         int     ret;
  76         ulong   of_size = 0;
  77         struct lmb *lmb = images->lmb;
  78
  79 #if defined(CONFIG_OF_LIBFDT)
  80         char    *of_flat_tree = NULL;
  81 #endif
  82
  83         bootmap_base = 0;
  84
  85         /*
  86          * Booting a (Linux) kernel image
  87          *
  88          * Allocate space for command line and board info - the
  89          * address should be as high as possible within the reach of
  90          * the kernel (see CFG_BOOTMAPSZ settings), but in unused
  91          * memory, which means far enough below the current stack
  92          * pointer.
  93          */
  94         sp = get_sp();
  95         debug ("## Current stack ends at 0x%08lx ", sp);
  96
  97         /* adjust sp by 1K to be safe */
  98         sp -= 1024;
  99         lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
 100
 101 #if defined(CONFIG_OF_LIBFDT)
 102         /* find flattened device tree */
 103         ret = get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
 104
 105         if (ret)
 106                 goto error;
 107 #endif
 108
 109         if (!of_size) {
 110                 /* allocate space and init command line */
 111                 ret = get_boot_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
 112                 if (ret) {
 113                         puts("ERROR with allocation of cmdline\n");
 114                         goto error;
 115                 }
 116
 117                 /* allocate space for kernel copy of board info */
 118                 ret = get_boot_kbd (lmb, &kbd, bootmap_base);
 119                 if (ret) {
 120                         puts("ERROR with allocation of kernel bd\n");
 121                         goto error;
 122                 }
 123                 set_clocks_in_mhz(kbd);
 124         }
 125
 126         /* find kernel entry point */
 127         if (images->legacy_hdr_valid) {
 128                 ep = image_get_ep (images->legacy_hdr_os);
 129 #if defined(CONFIG_FIT)
 130         } else if (images->fit_uname_os) {
 131                 fit_unsupported_reset ("PPC linux bootm");
 132                 goto error;
 133 #endif
 134         } else {
 135                 puts ("Could not find kernel entry point!\n");
 136                 goto error;
 137         }
 138         kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
 139
 140         /* find ramdisk */
 141         ret = get_ramdisk (cmdtp, flag, argc, argv, images,
 142                         IH_ARCH_PPC, &rd_data_start, &rd_data_end);
 143
 144         if (ret)
 145                 goto error;
 146
 147         rd_len = rd_data_end - rd_data_start;
 148
 149 #if defined(CONFIG_OF_LIBFDT)
 150         ret = fdt_relocate (lmb, bootmap_base,
 151                 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
 152
 153         /*
 154          * Add the chosen node if it doesn't exist, add the env and bd_t
 155          * if the user wants it (the logic is in the subroutines).
 156          */
 157         if (of_size) {
 158                 /* pass in dummy initrd info, we'll fix up later */
 159                 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
 160                         fdt_error ("/chosen node create failed");
 161                         goto error;
 162                 }
 163 #ifdef CONFIG_OF_HAS_UBOOT_ENV
 164                 if (fdt_env(of_flat_tree) < 0) {
 165                         fdt_error ("/u-boot-env node create failed");
 166                         goto error;
 167                 }
 168 #endif
 169 #ifdef CONFIG_OF_HAS_BD_T
 170                 if (fdt_bd_t(of_flat_tree) < 0) {
 171                         fdt_error ("/bd_t node create failed");
 172                         goto error;
 173                 }
 174 #endif
 175 #ifdef CONFIG_OF_BOARD_SETUP
 176                 /* Call the board-specific fixup routine */
 177                 ft_board_setup(of_flat_tree, gd->bd);
 178 #endif
 179         }
 180 #endif  /* CONFIG_OF_LIBFDT */
 181
 182         ret = ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
 183         if (ret)
 184                 goto error;
 185
 186 #if defined(CONFIG_OF_LIBFDT)
 187         /* fixup the initrd now that we know where it should be */
 188         if ((of_flat_tree) && (initrd_start && initrd_end)) {
 189                 uint64_t addr, size;
 190                 int  total = fdt_num_mem_rsv(of_flat_tree);
 191                 int  j;
 192
 193                 /* Look for the dummy entry and delete it */
 194                 for (j = 0; j < total; j++) {
 195                         fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
 196                         if (addr == rd_data_start) {
 197                                 fdt_del_mem_rsv(of_flat_tree, j);
 198                                 break;
 199                         }
 200                 }
 201
 202                 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
 203                                         initrd_end - initrd_start + 1);
 204                 if (ret < 0) {
 205                         printf("fdt_chosen: %s\n", fdt_strerror(ret));
 206                         goto error;
 207                 }
 208
 209                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
 210                                         "linux,initrd-start", initrd_start, 0);
 211                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
 212                                         "linux,initrd-end", initrd_end, 0);
 213         }
 214 #endif
 215         debug ("## Transferring control to Linux (at address %08lx) ...\n",
 216                 (ulong)kernel);
 217
 218         show_boot_progress (15);
 219
 220 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
 221         unlock_ram_in_cache();
 222 #endif
 223
 224 #if defined(CONFIG_OF_LIBFDT)
 225         if (of_flat_tree) {     /* device tree; boot new style */
 226                 /*
 227                  * Linux Kernel Parameters (passing device tree):
 228                  *   r3: pointer to the fdt, followed by the board info data
 229                  *   r4: physical pointer to the kernel itself
 230                  *   r5: NULL
 231                  *   r6: NULL
 232                  *   r7: NULL
 233                  */
 234                 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
 235                 /* does not return */
 236         }
 237 #endif
 238         /*
 239          * Linux Kernel Parameters (passing board info data):
 240          *   r3: ptr to board info data
 241          *   r4: initrd_start or 0 if no initrd
 242          *   r5: initrd_end - unused if r4 is 0
 243          *   r6: Start of command line string
 244          *   r7: End   of command line string
 245          */
 246         (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
 247         /* does not return */
 248         return ;
 249
 250 error:
 251         do_reset (cmdtp, flag, argc, argv);
 252         return ;
 253 }
 254
 255 static ulong get_sp (void)
 256 {
 257         ulong sp;
 258
 259         asm( "mr %0,1": "=r"(sp) : );
 260         return sp;
 261 }
 262
 263 static void set_clocks_in_mhz (bd_t *kbd)
 264 {
 265         char    *s;
 266
 267         if ((s = getenv ("clocks_in_mhz")) != NULL) {
 268                 /* convert all clock information to MHz */
 269                 kbd->bi_intfreq /= 1000000L;
 270                 kbd->bi_busfreq /= 1000000L;
 271 #if defined(CONFIG_MPC8220)
 272                 kbd->bi_inpfreq /= 1000000L;
 273                 kbd->bi_pcifreq /= 1000000L;
 274                 kbd->bi_pevfreq /= 1000000L;
 275                 kbd->bi_flbfreq /= 1000000L;
 276                 kbd->bi_vcofreq /= 1000000L;
 277 #endif
 278 #if defined(CONFIG_CPM2)
 279                 kbd->bi_cpmfreq /= 1000000L;
 280                 kbd->bi_brgfreq /= 1000000L;
 281                 kbd->bi_sccfreq /= 1000000L;
 282                 kbd->bi_vco     /= 1000000L;
 283 #endif
 284 #if defined(CONFIG_MPC5xxx)
 285                 kbd->bi_ipbfreq /= 1000000L;
 286                 kbd->bi_pcifreq /= 1000000L;
 287 #endif /* CONFIG_MPC5xxx */
 288         }
 289 }
 290
 291 #if defined(CONFIG_OF_LIBFDT)
 292 static void fdt_error (const char *msg)
 293 {
 294         puts ("ERROR: ");
 295         puts (msg);
 296         puts (" - must RESET the board to recover.\n");
 297 }
 298
 299 static image_header_t *image_get_fdt (ulong fdt_addr)
 300 {
 301         image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
 302
 303         image_print_contents (fdt_hdr);
 304
 305         puts ("   Verifying Checksum ... ");
 306         if (!image_check_hcrc (fdt_hdr)) {
 307                 fdt_error ("fdt header checksum invalid");
 308                 return NULL;
 309         }
 310
 311         if (!image_check_dcrc (fdt_hdr)) {
 312                 fdt_error ("fdt checksum invalid");
 313                 return NULL;
 314         }
 315         puts ("OK\n");
 316
 317         if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
 318                 fdt_error ("uImage is not a fdt");
 319                 return NULL;
 320         }
 321         if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
 322                 fdt_error ("uImage is compressed");
 323                 return NULL;
 324         }
 325         if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
 326                 fdt_error ("uImage data is not a fdt");
 327                 return NULL;
 328         }
 329         return fdt_hdr;
 330 }
 331
 332 static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 333                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
 334 {
 335         ulong           fdt_addr;
 336         image_header_t  *fdt_hdr;
 337         char            *fdt_blob = NULL;
 338         ulong           image_start, image_end;
 339         ulong           load_start, load_end;
 340 #if defined(CONFIG_FIT)
 341         void            *fit_hdr;
 342         const char      *fit_uname_config = NULL;
 343         const char      *fit_uname_fdt = NULL;
 344         ulong           default_addr;
 345 #endif
 346
 347         if (argc > 3) {
 348 #if defined(CONFIG_FIT)
 349                 /*
 350                  * If the FDT blob comes from the FIT image and the FIT image
 351                  * address is omitted in the command line argument, try to use
 352                  * ramdisk or os FIT image address or default load address.
 353                  */
 354                 if (images->fit_uname_rd)
 355                         default_addr = (ulong)images->fit_hdr_rd;
 356                 else if (images->fit_uname_os)
 357                         default_addr = (ulong)images->fit_hdr_os;
 358                 else
 359                         default_addr = load_addr;
 360
 361                 if (fit_parse_conf (argv[3], default_addr,
 362                                         &fdt_addr, &fit_uname_config)) {
 363                         debug ("*  fdt: config '%s' from image at 0x%08lx\n",
 364                                         fit_uname_config, fdt_addr);
 365                 } else if (fit_parse_subimage (argv[3], default_addr,
 366                                         &fdt_addr, &fit_uname_fdt)) {
 367                         debug ("*  fdt: subimage '%s' from image at 0x%08lx\n",
 368                                         fit_uname_fdt, fdt_addr);
 369                 } else
 370 #endif
 371                 {
 372                         fdt_addr = simple_strtoul(argv[3], NULL, 16);
 373                         debug ("*  fdt: cmdline image address = 0x%08lx\n",
 374                                         fdt_addr);
 375                 }
 376
 377                 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
 378                                 fdt_addr);
 379
 380                 /* copy from dataflash if needed */
 381                 fdt_addr = gen_get_image (fdt_addr);
 382
 383                 /*
 384                  * Check if there is an FDT image at the
 385                  * address provided in the second bootm argument
 386                  * check image type, for FIT images get a FIT node.
 387                  */
 388                 switch (gen_image_get_format ((void *)fdt_addr)) {
 389                 case IMAGE_FORMAT_LEGACY:
 390                         debug ("*  fdt: legacy format image\n");
 391
 392                         /* verify fdt_addr points to a valid image header */
 393                         printf ("## Flattened Device Tree Legacy Image at %08lx\n",
 394                                         fdt_addr);
 395                         fdt_hdr = image_get_fdt (fdt_addr);
 396                         if (!fdt_hdr)
 397                                 goto error;
 398
 399                         /*
 400                          * move image data to the load address,
 401                          * make sure we don't overwrite initial image
 402                          */
 403                         image_start = (ulong)fdt_hdr;
 404                         image_end = image_get_image_end (fdt_hdr);
 405
 406                         load_start = image_get_load (fdt_hdr);
 407                         load_end = load_start + image_get_data_size (fdt_hdr);
 408
 409                         if ((load_start < image_end) && (load_end > image_start)) {
 410                                 fdt_error ("fdt overwritten");
 411                                 goto error;
 412                         }
 413                         memmove ((void *)image_get_load (fdt_hdr),
 414                                         (void *)image_get_data (fdt_hdr),
 415                                         image_get_data_size (fdt_hdr));
 416
 417                         fdt_blob = (char *)image_get_load (fdt_hdr);
 418                         break;
 419                 case IMAGE_FORMAT_FIT:
 420                         /*
 421                          * This case will catch both: new uImage format
 422                          * (libfdt based) and raw FDT blob (also libfdt
 423                          * based).
 424                          */
 425 #if defined(CONFIG_FIT)
 426                         /* check FDT blob vs FIT blob */
 427                         if (0) { /* FIXME: call FIT format verification */
 428                                 /*
 429                                  * FIT image
 430                                  */
 431                                 fit_hdr = (void *)fdt_addr;
 432                                 debug ("*  fdt: FIT format image\n");
 433                                 fit_unsupported_reset ("PPC fdt");
 434                                 goto error;
 435                         } else
 436 #endif
 437                         {
 438                                 /*
 439                                  * FDT blob
 440                                  */
 441                                 debug ("*  fdt: raw FDT blob\n");
 442                                 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
 443                                 fdt_blob = (char *)fdt_addr;
 444                         }
 445                         break;
 446                 default:
 447                         fdt_error ("Did not find a cmdline Flattened Device Tree");
 448                         goto error;
 449                 }
 450
 451                 printf ("   Booting using the fdt blob at 0x%x\n", fdt_blob);
 452
 453         } else if (images->legacy_hdr_valid &&
 454                         image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
 455
 456                 ulong fdt_data, fdt_len;
 457
 458                 /*
 459                  * Now check if we have a legacy multi-component image,
 460                  * get second entry data start address and len.
 461                  */
 462                 printf ("## Flattened Device Tree from multi "
 463                         "component Image at %08lX\n",
 464                         (ulong)images->legacy_hdr_os);
 465
 466                 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
 467                 if (fdt_len) {
 468
 469                         fdt_blob = (char *)fdt_data;
 470                         printf ("   Booting using the fdt at 0x%x\n", fdt_blob);
 471
 472                         if (fdt_check_header (fdt_blob) != 0) {
 473                                 fdt_error ("image is not a fdt");
 474                                 goto error;
 475                         }
 476
 477                         if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
 478                                 fdt_error ("fdt size != image size");
 479                                 goto error;
 480                         }
 481                 } else {
 482                         fdt_error ("Did not find a Flattened Device Tree "
 483                                 "in a legacy multi-component image");
 484                         goto error;
 485                 }
 486         } else {
 487                 debug ("## No Flattened Device Tree\n");
 488                 *of_flat_tree = NULL;
 489                 *of_size = 0;
 490                 return 0;
 491         }
 492
 493         *of_flat_tree = fdt_blob;
 494         *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
 495         debug ("   of_flat_tree at 0x%08lx size 0x%08lx\n",
 496                         *of_flat_tree, *of_size);
 497
 498         return 0;
 499
 500 error:
 501         do_reset (cmdtp, flag, argc, argv);
 502         return 1;
 503 }
 504
 505 static int fdt_relocate (struct lmb *lmb, ulong bootmap_base,
 506                 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 507                 char **of_flat_tree, ulong *of_size)
 508 {
 509         char    *fdt_blob = *of_flat_tree;
 510         ulong   relocate = 0;
 511         ulong   of_len = 0;
 512
 513         /* nothing to do */
 514         if (*of_size == 0)
 515                 return 0;
 516
 517         if (fdt_check_header (fdt_blob) != 0) {
 518                 fdt_error ("image is not a fdt");
 519                 goto error;
 520         }
 521
 522 #ifndef CFG_NO_FLASH
 523         /* move the blob if it is in flash (set relocate) */
 524         if (addr2info ((ulong)fdt_blob) != NULL)
 525                 relocate = 1;
 526 #endif
 527
 528         /*
 529          * The blob must be within CFG_BOOTMAPSZ,
 530          * so we flag it to be copied if it is not.
 531          */
 532         if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
 533                 relocate = 1;
 534
 535         of_len = be32_to_cpu (fdt_totalsize (fdt));
 536
 537         /* move flattend device tree if needed */
 538         if (relocate) {
 539                 int err;
 540                 ulong of_start;
 541
 542                 /* position on a 4K boundary before the alloc_current */
 543                 of_start = lmb_alloc_base(lmb, of_len, 0x1000,
 544                                          (CFG_BOOTMAPSZ + bootmap_base));
 545
 546                 if (of_start == 0) {
 547                         puts("device tree - allocation error\n");
 548                         goto error;
 549                 }
 550
 551                 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
 552                         (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
 553                         of_len, of_len);
 554
 555                 printf ("   Loading Device Tree to %08lx, end %08lx ... ",
 556                         of_start, of_start + of_len - 1);
 557
 558                 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
 559                 if (err != 0) {
 560                         fdt_error ("fdt move failed");
 561                         goto error;
 562                 }
 563                 puts ("OK\n");
 564
 565                 *of_flat_tree = (char *)of_start;
 566         } else {
 567                 *of_flat_tree = fdt_blob;
 568                 lmb_reserve(lmb, (ulong)fdt, of_len);
 569         }
 570
 571         return 0;
 572
 573 error:
 574         return 1;
 575 }
 576 #endif