lib_arm/armlinux.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <image.h>
  27 #include <zlib.h>
  28 #include <asm/byteorder.h>
  29 #ifdef CONFIG_HAS_DATAFLASH
  30 #include <dataflash.h>
  31 #endif
  32
  33 /*cmd_boot.c*/
  34 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  35
  36 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
  37     defined (CONFIG_CMDLINE_TAG) || \
  38     defined (CONFIG_INITRD_TAG) || \
  39     defined (CONFIG_SERIAL_TAG) || \
  40     defined (CONFIG_REVISION_TAG) || \
  41     defined (CONFIG_VFD) || \
  42     defined (CONFIG_LCD)
  43 static void setup_start_tag (bd_t *bd);
  44
  45 # ifdef CONFIG_SETUP_MEMORY_TAGS
  46 static void setup_memory_tags (bd_t *bd);
  47 # endif
  48 static void setup_commandline_tag (bd_t *bd, char *commandline);
  49
  50 #if 0
  51 static void setup_ramdisk_tag (bd_t *bd);
  52 #endif
  53 # ifdef CONFIG_INITRD_TAG
  54 static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
  55                               ulong initrd_end);
  56 # endif
  57 static void setup_end_tag (bd_t *bd);
  58
  59 # if defined (CONFIG_VFD) || defined (CONFIG_LCD)
  60 static void setup_videolfb_tag (gd_t *gd);
  61 # endif
  62
  63
  64 static struct tag *params;
  65 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
  66
  67 #ifdef CONFIG_SHOW_BOOT_PROGRESS
  68 # include <status_led.h>
  69 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
  70 #else
  71 # define SHOW_BOOT_PROGRESS(arg)
  72 #endif
  73
  74 extern image_header_t header;   /* from cmd_bootm.c */
  75
  76
  77 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  78                      ulong addr, ulong *len_ptr, int verify)
  79 {
  80         DECLARE_GLOBAL_DATA_PTR;
  81
  82         ulong len = 0, checksum;
  83         ulong initrd_start, initrd_end;
  84         ulong data;
  85         void (*theKernel)(int zero, int arch, uint params);
  86         image_header_t *hdr = &header;
  87         bd_t *bd = gd->bd;
  88
  89 #ifdef CONFIG_CMDLINE_TAG
  90         char *commandline = getenv ("bootargs");
  91 #endif
  92
  93         theKernel = (void (*)(int, int, uint))ntohl(hdr->ih_ep);
  94
  95         /*
  96          * Check if there is an initrd image
  97          */
  98         if (argc >= 3) {
  99                 SHOW_BOOT_PROGRESS (9);
 100
 101                 addr = simple_strtoul (argv[2], NULL, 16);
 102
 103                 printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
 104
 105                 /* Copy header so we can blank CRC field for re-calculation */
 106 #ifdef CONFIG_HAS_DATAFLASH
 107                 if (addr_dataflash (addr)) {
 108                         read_dataflash (addr, sizeof (image_header_t),
 109                                         (char *) &header);
 110                 } else
 111 #endif
 112                         memcpy (&header, (char *) addr,
 113                                 sizeof (image_header_t));
 114
 115                 if (ntohl (hdr->ih_magic) != IH_MAGIC) {
 116                         printf ("Bad Magic Number\n");
 117                         SHOW_BOOT_PROGRESS (-10);
 118                         do_reset (cmdtp, flag, argc, argv);
 119                 }
 120
 121                 data = (ulong) & header;
 122                 len = sizeof (image_header_t);
 123
 124                 checksum = ntohl (hdr->ih_hcrc);
 125                 hdr->ih_hcrc = 0;
 126
 127                 if (crc32 (0, (unsigned char *) data, len) != checksum) {
 128                         printf ("Bad Header Checksum\n");
 129                         SHOW_BOOT_PROGRESS (-11);
 130                         do_reset (cmdtp, flag, argc, argv);
 131                 }
 132
 133                 SHOW_BOOT_PROGRESS (10);
 134
 135                 print_image_hdr (hdr);
 136
 137                 data = addr + sizeof (image_header_t);
 138                 len = ntohl (hdr->ih_size);
 139
 140 #ifdef CONFIG_HAS_DATAFLASH
 141                 if (addr_dataflash (addr)) {
 142                         read_dataflash (data, len, (char *) CFG_LOAD_ADDR);
 143                         data = CFG_LOAD_ADDR;
 144                 }
 145 #endif
 146
 147                 if (verify) {
 148                         ulong csum = 0;
 149
 150                         printf ("   Verifying Checksum ... ");
 151                         csum = crc32 (0, (unsigned char *) data, len);
 152                         if (csum != ntohl (hdr->ih_dcrc)) {
 153                                 printf ("Bad Data CRC\n");
 154                                 SHOW_BOOT_PROGRESS (-12);
 155                                 do_reset (cmdtp, flag, argc, argv);
 156                         }
 157                         printf ("OK\n");
 158                 }
 159
 160                 SHOW_BOOT_PROGRESS (11);
 161
 162                 if ((hdr->ih_os != IH_OS_LINUX) ||
 163                     (hdr->ih_arch != IH_CPU_ARM) ||
 164                     (hdr->ih_type != IH_TYPE_RAMDISK)) {
 165                         printf ("No Linux ARM Ramdisk Image\n");
 166                         SHOW_BOOT_PROGRESS (-13);
 167                         do_reset (cmdtp, flag, argc, argv);
 168                 }
 169
 170 #if defined(CONFIG_B2) || defined(CONFIG_EVB4510) || defined(CONFIG_ARMADILLO)
 171                 /*
 172                  *we need to copy the ramdisk to SRAM to let Linux boot
 173                  */
 174                 memmove ((void *) ntohl(hdr->ih_load), (uchar *)data, len);
 175                 data = ntohl(hdr->ih_load);
 176 #endif /* CONFIG_B2 || CONFIG_EVB4510 */
 177
 178                 /*
 179                  * Now check if we have a multifile image
 180                  */
 181         } else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
 182                 ulong tail = ntohl (len_ptr[0]) % 4;
 183                 int i;
 184
 185                 SHOW_BOOT_PROGRESS (13);
 186
 187                 /* skip kernel length and terminator */
 188                 data = (ulong) (&len_ptr[2]);
 189                 /* skip any additional image length fields */
 190                 for (i = 1; len_ptr[i]; ++i)
 191                         data += 4;
 192                 /* add kernel length, and align */
 193                 data += ntohl (len_ptr[0]);
 194                 if (tail) {
 195                         data += 4 - tail;
 196                 }
 197
 198                 len = ntohl (len_ptr[1]);
 199
 200         } else {
 201                 /*
 202                  * no initrd image
 203                  */
 204                 SHOW_BOOT_PROGRESS (14);
 205
 206                 len = data = 0;
 207         }
 208
 209 #ifdef  DEBUG
 210         if (!data) {
 211                 printf ("No initrd\n");
 212         }
 213 #endif
 214
 215         if (data) {
 216                 initrd_start = data;
 217                 initrd_end = initrd_start + len;
 218         } else {
 219                 initrd_start = 0;
 220                 initrd_end = 0;
 221         }
 222
 223         SHOW_BOOT_PROGRESS (15);
 224
 225         debug ("## Transferring control to Linux (at address %08lx) ...\n",
 226                (ulong) theKernel);
 227
 228 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
 229     defined (CONFIG_CMDLINE_TAG) || \
 230     defined (CONFIG_INITRD_TAG) || \
 231     defined (CONFIG_SERIAL_TAG) || \
 232     defined (CONFIG_REVISION_TAG) || \
 233     defined (CONFIG_LCD) || \
 234     defined (CONFIG_VFD)
 235         setup_start_tag (bd);
 236 #ifdef CONFIG_SERIAL_TAG
 237         setup_serial_tag (&params);
 238 #endif
 239 #ifdef CONFIG_REVISION_TAG
 240         setup_revision_tag (&params);
 241 #endif
 242 #ifdef CONFIG_SETUP_MEMORY_TAGS
 243         setup_memory_tags (bd);
 244 #endif
 245 #ifdef CONFIG_CMDLINE_TAG
 246         setup_commandline_tag (bd, commandline);
 247 #endif
 248 #ifdef CONFIG_INITRD_TAG
 249         if (initrd_start && initrd_end)
 250                 setup_initrd_tag (bd, initrd_start, initrd_end);
 251 #endif
 252 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 253         setup_videolfb_tag ((gd_t *) gd);
 254 #endif
 255         setup_end_tag (bd);
 256 #endif
 257
 258         /* we assume that the kernel is in place */
 259         printf ("\nStarting kernel ...\n\n");
 260
 261 #ifdef CONFIG_USB_DEVICE
 262         {
 263                 extern void udc_disconnect (void);
 264                 udc_disconnect ();
 265         }
 266 #endif
 267
 268         cleanup_before_linux ();
 269
 270         theKernel (0, bd->bi_arch_number, bd->bi_boot_params);
 271 }
 272
 273
 274 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
 275     defined (CONFIG_CMDLINE_TAG) || \
 276     defined (CONFIG_INITRD_TAG) || \
 277     defined (CONFIG_SERIAL_TAG) || \
 278     defined (CONFIG_REVISION_TAG) || \
 279     defined (CONFIG_LCD) || \
 280     defined (CONFIG_VFD)
 281 static void setup_start_tag (bd_t *bd)
 282 {
 283         params = (struct tag *) bd->bi_boot_params;
 284
 285         params->hdr.tag = ATAG_CORE;
 286         params->hdr.size = tag_size (tag_core);
 287
 288         params->u.core.flags = 0;
 289         params->u.core.pagesize = 0;
 290         params->u.core.rootdev = 0;
 291
 292         params = tag_next (params);
 293 }
 294
 295
 296 #ifdef CONFIG_SETUP_MEMORY_TAGS
 297 static void setup_memory_tags (bd_t *bd)
 298 {
 299         int i;
 300
 301         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 302                 params->hdr.tag = ATAG_MEM;
 303                 params->hdr.size = tag_size (tag_mem32);
 304
 305                 params->u.mem.start = bd->bi_dram[i].start;
 306                 params->u.mem.size = bd->bi_dram[i].size;
 307
 308                 params = tag_next (params);
 309         }
 310 }
 311 #endif /* CONFIG_SETUP_MEMORY_TAGS */
 312
 313
 314 static void setup_commandline_tag (bd_t *bd, char *commandline)
 315 {
 316         char *p;
 317
 318         if (!commandline)
 319                 return;
 320
 321         /* eat leading white space */
 322         for (p = commandline; *p == ' '; p++);
 323
 324         /* skip non-existent command lines so the kernel will still
 325          * use its default command line.
 326          */
 327         if (*p == '\0')
 328                 return;
 329
 330         params->hdr.tag = ATAG_CMDLINE;
 331         params->hdr.size =
 332                 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
 333
 334         strcpy (params->u.cmdline.cmdline, p);
 335
 336         params = tag_next (params);
 337 }
 338
 339
 340 #ifdef CONFIG_INITRD_TAG
 341 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
 342 {
 343         /* an ATAG_INITRD node tells the kernel where the compressed
 344          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
 345          */
 346         params->hdr.tag = ATAG_INITRD2;
 347         params->hdr.size = tag_size (tag_initrd);
 348
 349         params->u.initrd.start = initrd_start;
 350         params->u.initrd.size = initrd_end - initrd_start;
 351
 352         params = tag_next (params);
 353 }
 354 #endif /* CONFIG_INITRD_TAG */
 355
 356
 357 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 358 extern ulong calc_fbsize (void);
 359 static void setup_videolfb_tag (gd_t *gd)
 360 {
 361         /* An ATAG_VIDEOLFB node tells the kernel where and how large
 362          * the framebuffer for video was allocated (among other things).
 363          * Note that a _physical_ address is passed !
 364          *
 365          * We only use it to pass the address and size, the other entries
 366          * in the tag_videolfb are not of interest.
 367          */
 368         params->hdr.tag = ATAG_VIDEOLFB;
 369         params->hdr.size = tag_size (tag_videolfb);
 370
 371         params->u.videolfb.lfb_base = (u32) gd->fb_base;
 372         /* Fb size is calculated according to parameters for our panel
 373          */
 374         params->u.videolfb.lfb_size = calc_fbsize();
 375
 376         params = tag_next (params);
 377 }
 378 #endif /* CONFIG_VFD || CONFIG_LCD */
 379
 380 #ifdef CONFIG_SERIAL_TAG
 381 void setup_serial_tag (struct tag **tmp)
 382 {
 383         struct tag *params = *tmp;
 384         struct tag_serialnr serialnr;
 385         void get_board_serial(struct tag_serialnr *serialnr);
 386
 387         get_board_serial(&serialnr);
 388         params->hdr.tag = ATAG_SERIAL;
 389         params->hdr.size = tag_size (tag_serialnr);
 390         params->u.serialnr.low = serialnr.low;
 391         params->u.serialnr.high= serialnr.high;
 392         params = tag_next (params);
 393         *tmp = params;
 394 }
 395 #endif
 396
 397 #ifdef CONFIG_REVISION_TAG
 398 void setup_revision_tag(struct tag **in_params)
 399 {
 400         u32 rev = 0;
 401         u32 get_board_rev(void);
 402
 403         rev = get_board_rev();
 404         params->hdr.tag = ATAG_REVISION;
 405         params->hdr.size = tag_size (tag_revision);
 406         params->u.revision.rev = rev;
 407         params = tag_next (params);
 408 }
 409 #endif  /* CONFIG_REVISION_TAG */
 410
 411
 412 static void setup_end_tag (bd_t *bd)
 413 {
 414         params->hdr.tag = ATAG_NONE;
 415         params->hdr.size = 0;
 416 }
 417
 418 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */