arch/m68k/lib/board.c

   1 /*
   2  * (C) Copyright 2003
   3  * Josef Baumgartner <josef.baumgartner@telex.de>
   4  *
   5  * (C) Copyright 2000-2002
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <watchdog.h>
  29 #include <command.h>
  30 #include <malloc.h>
  31 #include <stdio_dev.h>
  32
  33 #include <asm/immap.h>
  34
  35 #if defined(CONFIG_CMD_IDE)
  36 #include <ide.h>
  37 #endif
  38 #if defined(CONFIG_CMD_SCSI)
  39 #include <scsi.h>
  40 #endif
  41 #if defined(CONFIG_CMD_KGDB)
  42 #include <kgdb.h>
  43 #endif
  44 #ifdef CONFIG_STATUS_LED
  45 #include <status_led.h>
  46 #endif
  47 #include <net.h>
  48 #include <serial.h>
  49 #if defined(CONFIG_CMD_BEDBUG)
  50 #include <cmd_bedbug.h>
  51 #endif
  52 #ifdef CONFIG_SYS_ALLOC_DPRAM
  53 #include <commproc.h>
  54 #endif
  55 #include <version.h>
  56
  57 #if defined(CONFIG_HARD_I2C) || \
  58     defined(CONFIG_SOFT_I2C)
  59 #include <i2c.h>
  60 #endif
  61
  62 #ifdef CONFIG_CMD_SPI
  63 #include <spi.h>
  64 #endif
  65
  66 #ifdef CONFIG_BITBANGMII
  67 #include <miiphy.h>
  68 #endif
  69
  70 #include <nand.h>
  71
  72 DECLARE_GLOBAL_DATA_PTR;
  73
  74 static char *failed = "*** failed ***\n";
  75
  76 #ifdef  CONFIG_PCU_E
  77 extern flash_info_t flash_info[];
  78 #endif
  79
  80 #include <environment.h>
  81
  82 extern ulong __init_end;
  83 extern ulong _end;
  84
  85 extern  void timer_init(void);
  86
  87 #if defined(CONFIG_WATCHDOG)
  88 # define INIT_FUNC_WATCHDOG_INIT        watchdog_init,
  89 # define WATCHDOG_DISABLE               watchdog_disable
  90
  91 extern int watchdog_init(void);
  92 extern int watchdog_disable(void);
  93 #else
  94 # define INIT_FUNC_WATCHDOG_INIT        /* undef */
  95 # define WATCHDOG_DISABLE               /* undef */
  96 #endif /* CONFIG_WATCHDOG */
  97
  98 ulong monitor_flash_len;
  99
 100 /************************************************************************
 101  * Utilities                                                            *
 102  ************************************************************************
 103  */
 104
 105 /*
 106  * All attempts to come up with a "common" initialization sequence
 107  * that works for all boards and architectures failed: some of the
 108  * requirements are just _too_ different. To get rid of the resulting
 109  * mess of board dependend #ifdef'ed code we now make the whole
 110  * initialization sequence configurable to the user.
 111  *
 112  * The requirements for any new initalization function is simple: it
 113  * receives a pointer to the "global data" structure as it's only
 114  * argument, and returns an integer return code, where 0 means
 115  * "continue" and != 0 means "fatal error, hang the system".
 116  */
 117 typedef int (init_fnc_t) (void);
 118
 119 /************************************************************************
 120  * Init Utilities
 121  ************************************************************************
 122  * Some of this code should be moved into the core functions,
 123  * but let's get it working (again) first...
 124  */
 125
 126 static int init_baudrate (void)
 127 {
 128         char tmp[64];   /* long enough for environment variables */
 129         int i = getenv_f("baudrate", tmp, sizeof (tmp));
 130
 131         gd->baudrate = (i > 0)
 132                         ? (int) simple_strtoul (tmp, NULL, 10)
 133                         : CONFIG_BAUDRATE;
 134         return (0);
 135 }
 136
 137 /***********************************************************************/
 138
 139 static int init_func_ram (void)
 140 {
 141         int board_type = 0;     /* use dummy arg */
 142         puts ("DRAM:  ");
 143
 144         if ((gd->ram_size = initdram (board_type)) > 0) {
 145                 print_size (gd->ram_size, "\n");
 146                 return (0);
 147         }
 148         puts (failed);
 149         return (1);
 150 }
 151
 152 /***********************************************************************/
 153
 154 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 155 static int init_func_i2c (void)
 156 {
 157         puts ("I2C:   ");
 158         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 159         puts ("ready\n");
 160         return (0);
 161 }
 162 #endif
 163
 164 #if defined(CONFIG_HARD_SPI)
 165 static int init_func_spi (void)
 166 {
 167         puts ("SPI:   ");
 168         spi_init ();
 169         puts ("ready\n");
 170         return (0);
 171 }
 172 #endif
 173
 174 /***********************************************************************/
 175
 176 /************************************************************************
 177  * Initialization sequence                                              *
 178  ************************************************************************
 179  */
 180
 181 init_fnc_t *init_sequence[] = {
 182         get_clocks,
 183         env_init,
 184         init_baudrate,
 185         serial_init,
 186         console_init_f,
 187         display_options,
 188         checkcpu,
 189         checkboard,
 190 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 191         init_func_i2c,
 192 #endif
 193 #if defined(CONFIG_HARD_SPI)
 194         init_func_spi,
 195 #endif
 196         init_func_ram,
 197 #if defined(CONFIG_SYS_DRAM_TEST)
 198         testdram,
 199 #endif /* CONFIG_SYS_DRAM_TEST */
 200         INIT_FUNC_WATCHDOG_INIT
 201         NULL,                   /* Terminate this list */
 202 };
 203
 204
 205 /************************************************************************
 206  *
 207  * This is the first part of the initialization sequence that is
 208  * implemented in C, but still running from ROM.
 209  *
 210  * The main purpose is to provide a (serial) console interface as
 211  * soon as possible (so we can see any error messages), and to
 212  * initialize the RAM so that we can relocate the monitor code to
 213  * RAM.
 214  *
 215  * Be aware of the restrictions: global data is read-only, BSS is not
 216  * initialized, and stack space is limited to a few kB.
 217  *
 218  ************************************************************************
 219  */
 220
 221 void
 222 board_init_f (ulong bootflag)
 223 {
 224         bd_t *bd;
 225         ulong len, addr, addr_sp;
 226         ulong *paddr;
 227         gd_t *id;
 228         init_fnc_t **init_fnc_ptr;
 229 #ifdef CONFIG_PRAM
 230         int i;
 231         ulong reg;
 232         char tmp[64];           /* long enough for environment variables */
 233 #endif
 234
 235         /* Pointer is writable since we allocated a register for it */
 236         gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
 237         /* compiler optimization barrier needed for GCC >= 3.4 */
 238         __asm__ __volatile__("": : :"memory");
 239
 240         /* Clear initial global data */
 241         memset ((void *) gd, 0, sizeof (gd_t));
 242
 243         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 244                 if ((*init_fnc_ptr)() != 0) {
 245                         hang ();
 246                 }
 247         }
 248
 249         /*
 250          * Now that we have DRAM mapped and working, we can
 251          * relocate the code and continue running from DRAM.
 252          *
 253          * Reserve memory at end of RAM for (top down in that order):
 254          *      - protected RAM
 255          *      - LCD framebuffer
 256          *      - monitor code
 257          *      - board info struct
 258          */
 259         len = (ulong)&_end - CONFIG_SYS_MONITOR_BASE;
 260
 261         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 262
 263 #ifdef CONFIG_LOGBUFFER
 264         /* reserve kernel log buffer */
 265         addr -= (LOGBUFF_RESERVE);
 266         debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
 267 #endif
 268
 269 #ifdef CONFIG_PRAM
 270         /*
 271          * reserve protected RAM
 272          */
 273         i = getenv_f("pram", tmp, sizeof (tmp));
 274         reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
 275         addr -= (reg << 10);            /* size is in kB */
 276         debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
 277 #endif /* CONFIG_PRAM */
 278
 279         /* round down to next 4 kB limit */
 280         addr &= ~(4096 - 1);
 281         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 282
 283 #ifdef CONFIG_LCD
 284         /* reserve memory for LCD display (always full pages) */
 285         addr = lcd_setmem (addr);
 286         gd->fb_base = addr;
 287 #endif /* CONFIG_LCD */
 288
 289         /*
 290          * reserve memory for U-Boot code, data & bss
 291          * round down to next 4 kB limit
 292          */
 293         addr -= len;
 294         addr &= ~(4096 - 1);
 295
 296         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 297
 298         /*
 299          * reserve memory for malloc() arena
 300          */
 301         addr_sp = addr - TOTAL_MALLOC_LEN;
 302         debug ("Reserving %dk for malloc() at: %08lx\n",
 303                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 304
 305         /*
 306          * (permanently) allocate a Board Info struct
 307          * and a permanent copy of the "global" data
 308          */
 309         addr_sp -= sizeof (bd_t);
 310         bd = (bd_t *) addr_sp;
 311         gd->bd = bd;
 312         debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
 313                         sizeof (bd_t), addr_sp);
 314         addr_sp -= sizeof (gd_t);
 315         id = (gd_t *) addr_sp;
 316         debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
 317                         sizeof (gd_t), addr_sp);
 318
 319         /* Reserve memory for boot params. */
 320         addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
 321         bd->bi_boot_params = addr_sp;
 322         debug ("Reserving %dk for boot parameters at: %08lx\n",
 323                         CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
 324
 325         /*
 326          * Finally, we set up a new (bigger) stack.
 327          *
 328          * Leave some safety gap for SP, force alignment on 16 byte boundary
 329          * Clear initial stack frame
 330          */
 331         addr_sp -= 16;
 332         addr_sp &= ~0xF;
 333
 334         paddr = (ulong *)addr_sp;
 335         *paddr-- = 0;
 336         *paddr-- = 0;
 337         addr_sp = (ulong)paddr;
 338
 339         debug ("Stack Pointer at: %08lx\n", addr_sp);
 340
 341         /*
 342          * Save local variables to board info struct
 343          */
 344         bd->bi_memstart  = CONFIG_SYS_SDRAM_BASE;       /* start of  DRAM memory      */
 345         bd->bi_memsize   = gd->ram_size;        /* size  of  DRAM memory in bytes */
 346 #ifdef CONFIG_SYS_INIT_RAM_ADDR
 347         bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR;    /* start of  SRAM memory        */
 348         bd->bi_sramsize  = CONFIG_SYS_INIT_RAM_END;     /* size  of  SRAM memory        */
 349 #endif
 350         bd->bi_mbar_base = CONFIG_SYS_MBAR;             /* base of internal registers */
 351
 352         bd->bi_bootflags = bootflag;            /* boot / reboot flag (for LynxOS)    */
 353
 354         WATCHDOG_RESET ();
 355         bd->bi_intfreq = gd->cpu_clk;   /* Internal Freq, in Hz */
 356         bd->bi_busfreq = gd->bus_clk;   /* Bus Freq,      in Hz */
 357 #ifdef CONFIG_PCI
 358         bd->bi_pcifreq = gd->pci_clk;           /* PCI Freq in Hz */
 359 #endif
 360 #ifdef CONFIG_EXTRA_CLOCK
 361         bd->bi_inpfreq = gd->inp_clk;           /* input Freq in Hz */
 362         bd->bi_vcofreq = gd->vco_clk;           /* vco Freq in Hz */
 363         bd->bi_flbfreq = gd->flb_clk;           /* flexbus Freq in Hz */
 364 #endif
 365         bd->bi_baudrate = gd->baudrate; /* Console Baudrate     */
 366
 367 #ifdef CONFIG_SYS_EXTBDINFO
 368         strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
 369         strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
 370 #endif
 371
 372         WATCHDOG_RESET ();
 373
 374 #ifdef CONFIG_POST
 375         post_bootmode_init();
 376         post_run (NULL, POST_ROM | post_bootmode_get(0));
 377 #endif
 378
 379         WATCHDOG_RESET();
 380
 381         memcpy (id, (void *)gd, sizeof (gd_t));
 382
 383         debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
 384         relocate_code (addr_sp, id, addr);
 385
 386         /* NOTREACHED - jump_to_ram() does not return */
 387 }
 388
 389 /************************************************************************
 390  *
 391  * This is the next part if the initialization sequence: we are now
 392  * running from RAM and have a "normal" C environment, i. e. global
 393  * data can be written, BSS has been cleared, the stack size in not
 394  * that critical any more, etc.
 395  *
 396  ************************************************************************
 397  */
 398 void board_init_r (gd_t *id, ulong dest_addr)
 399 {
 400         cmd_tbl_t *cmdtp;
 401         char *s;
 402         bd_t *bd;
 403         extern void malloc_bin_reloc (void);
 404
 405 #ifndef CONFIG_ENV_IS_NOWHERE
 406         extern char * env_name_spec;
 407 #endif
 408 #ifndef CONFIG_SYS_NO_FLASH
 409         ulong flash_size;
 410 #endif
 411         gd = id;                /* initialize RAM version of global data */
 412         bd = gd->bd;
 413
 414         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 415
 416 #ifdef CONFIG_SERIAL_MULTI
 417         serial_initialize();
 418 #endif
 419
 420         debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 421
 422         WATCHDOG_RESET ();
 423
 424         gd->reloc_off =  dest_addr - CONFIG_SYS_MONITOR_BASE;
 425
 426         monitor_flash_len = (ulong)&__init_end - dest_addr;
 427
 428 #if !defined(CONFIG_RELOC_FIXUP_WORKS)
 429         /*
 430          * We have to relocate the command table manually
 431          */
 432         fixup_cmdtable(&__u_boot_cmd_start,
 433                 (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
 434 #endif /* !defined(CONFIG_RELOC_FIXUP_WORKS) */
 435
 436         /* there are some other pointer constants we must deal with */
 437 #ifndef CONFIG_ENV_IS_NOWHERE
 438         env_name_spec += gd->reloc_off;
 439 #endif
 440
 441         WATCHDOG_RESET ();
 442
 443 #ifdef CONFIG_LOGBUFFER
 444         logbuff_init_ptrs ();
 445 #endif
 446 #ifdef CONFIG_POST
 447         post_output_backlog ();
 448         post_reloc ();
 449 #endif
 450         WATCHDOG_RESET();
 451
 452 #if 0
 453         /* instruction cache enabled in cpu_init_f() for faster relocation */
 454         icache_enable ();       /* it's time to enable the instruction cache */
 455 #endif
 456
 457         /*
 458          * Setup trap handlers
 459          */
 460         trap_init (CONFIG_SYS_SDRAM_BASE);
 461
 462         /* The Malloc area is immediately below the monitor copy in DRAM */
 463         mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
 464                         TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
 465         malloc_bin_reloc ();
 466
 467 #if !defined(CONFIG_SYS_NO_FLASH)
 468         puts ("FLASH: ");
 469
 470         if ((flash_size = flash_init ()) > 0) {
 471 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 472                 print_size (flash_size, "");
 473                 /*
 474                  * Compute and print flash CRC if flashchecksum is set to 'y'
 475                  *
 476                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 477                  */
 478                 s = getenv ("flashchecksum");
 479                 if (s && (*s == 'y')) {
 480                         printf ("  CRC: %08X",
 481                                         crc32 (0,
 482                                                    (const unsigned char *) CONFIG_SYS_FLASH_BASE,
 483                                                    flash_size)
 484                                         );
 485                 }
 486                 putc ('\n');
 487 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 488                 print_size (flash_size, "\n");
 489 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 490         } else {
 491                 puts (failed);
 492                 hang ();
 493         }
 494
 495         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;      /* update start of FLASH memory    */
 496         bd->bi_flashsize = flash_size;  /* size of FLASH memory (final value) */
 497         bd->bi_flashoffset = 0;
 498 #else   /* CONFIG_SYS_NO_FLASH */
 499         bd->bi_flashsize = 0;
 500         bd->bi_flashstart = 0;
 501         bd->bi_flashoffset = 0;
 502 #endif /* !CONFIG_SYS_NO_FLASH */
 503
 504         WATCHDOG_RESET ();
 505
 506         /* initialize higher level parts of CPU like time base and timers */
 507         cpu_init_r ();
 508
 509         WATCHDOG_RESET ();
 510
 511 #ifdef CONFIG_SPI
 512 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
 513         spi_init_f ();
 514 # endif
 515         spi_init_r ();
 516 #endif
 517
 518         /* relocate environment function pointers etc. */
 519         env_relocate ();
 520
 521         /*
 522          * Fill in missing fields of bd_info.
 523          * We do this here, where we have "normal" access to the
 524          * environment; we used to do this still running from ROM,
 525          * where had to use getenv_f(), which can be pretty slow when
 526          * the environment is in EEPROM.
 527          */
 528         bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 529
 530         WATCHDOG_RESET ();
 531
 532 #if defined(CONFIG_PCI)
 533         /*
 534          * Do pci configuration
 535          */
 536         pci_init ();
 537 #endif
 538
 539         /** leave this here (after malloc(), environment and PCI are working) **/
 540         /* Initialize stdio devices */
 541         stdio_init ();
 542
 543         /* Initialize the jump table for applications */
 544         jumptable_init ();
 545
 546         /* Initialize the console (after the relocation and devices init) */
 547         console_init_r ();
 548
 549 #if defined(CONFIG_MISC_INIT_R)
 550         /* miscellaneous platform dependent initialisations */
 551         misc_init_r ();
 552 #endif
 553
 554 #if defined(CONFIG_CMD_KGDB)
 555         WATCHDOG_RESET ();
 556         puts ("KGDB:  ");
 557         kgdb_init ();
 558 #endif
 559
 560         debug ("U-Boot relocated to %08lx\n", dest_addr);
 561
 562         /*
 563          * Enable Interrupts
 564          */
 565         interrupt_init ();
 566
 567         /* Must happen after interrupts are initialized since
 568          * an irq handler gets installed
 569          */
 570         timer_init();
 571
 572 #ifdef CONFIG_STATUS_LED
 573         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 574 #endif
 575
 576         udelay (20);
 577
 578         set_timer (0);
 579
 580         /* Insert function pointers now that we have relocated the code */
 581
 582         /* Initialize from environment */
 583         if ((s = getenv ("loadaddr")) != NULL) {
 584                 load_addr = simple_strtoul (s, NULL, 16);
 585         }
 586 #if defined(CONFIG_CMD_NET)
 587         if ((s = getenv ("bootfile")) != NULL) {
 588                 copy_filename (BootFile, s, sizeof (BootFile));
 589         }
 590 #endif
 591
 592         WATCHDOG_RESET ();
 593
 594 #if defined(CONFIG_CMD_DOC)
 595         WATCHDOG_RESET ();
 596         puts ("DOC:   ");
 597         doc_init ();
 598 #endif
 599
 600 #if defined(CONFIG_CMD_NAND)
 601         WATCHDOG_RESET ();
 602         puts ("NAND:  ");
 603         nand_init();            /* go init the NAND */
 604 #endif
 605
 606 #ifdef CONFIG_BITBANGMII
 607         bb_miiphy_init();
 608 #endif
 609 #if defined(CONFIG_CMD_NET)
 610         WATCHDOG_RESET();
 611 #if defined(FEC_ENET)
 612         eth_init(bd);
 613 #endif
 614 #if defined(CONFIG_NET_MULTI)
 615         puts ("Net:   ");
 616         eth_initialize (bd);
 617 #endif
 618 #endif
 619
 620 #ifdef CONFIG_POST
 621         post_run (NULL, POST_RAM | post_bootmode_get(0));
 622 #endif
 623
 624 #if defined(CONFIG_CMD_PCMCIA) \
 625     && !defined(CONFIG_CMD_IDE)
 626         WATCHDOG_RESET ();
 627         puts ("PCMCIA:");
 628         pcmcia_init ();
 629 #endif
 630
 631 #if defined(CONFIG_CMD_IDE)
 632         WATCHDOG_RESET ();
 633         puts ("IDE:   ");
 634         ide_init ();
 635 #endif
 636
 637 #ifdef CONFIG_LAST_STAGE_INIT
 638         WATCHDOG_RESET ();
 639         /*
 640          * Some parts can be only initialized if all others (like
 641          * Interrupts) are up and running (i.e. the PC-style ISA
 642          * keyboard).
 643          */
 644         last_stage_init ();
 645 #endif
 646
 647 #if defined(CONFIG_CMD_BEDBUG)
 648         WATCHDOG_RESET ();
 649         bedbug_init ();
 650 #endif
 651
 652 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 653         /*
 654          * Export available size of memory for Linux,
 655          * taking into account the protected RAM at top of memory
 656          */
 657         {
 658                 ulong pram;
 659                 char memsz[32];
 660 #ifdef CONFIG_PRAM
 661                 char *s;
 662
 663                 if ((s = getenv ("pram")) != NULL) {
 664                         pram = simple_strtoul (s, NULL, 10);
 665                 } else {
 666                         pram = CONFIG_PRAM;
 667                 }
 668 #else
 669                 pram=0;
 670 #endif
 671 #ifdef CONFIG_LOGBUFFER
 672                 /* Also take the logbuffer into account (pram is in kB) */
 673                 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
 674 #endif
 675                 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
 676                 setenv ("mem", memsz);
 677         }
 678 #endif
 679
 680 #ifdef CONFIG_MODEM_SUPPORT
 681  {
 682          extern int do_mdm_init;
 683          do_mdm_init = gd->do_mdm_init;
 684  }
 685 #endif
 686
 687 #ifdef CONFIG_WATCHDOG
 688         /* disable watchdog if environment is set */
 689         if ((s = getenv ("watchdog")) != NULL) {
 690                 if (strncmp (s, "off", 3) == 0) {
 691                         WATCHDOG_DISABLE ();
 692                 }
 693         }
 694 #endif /* CONFIG_WATCHDOG*/
 695
 696
 697         /* Initialization complete - start the monitor */
 698
 699         /* main_loop() can return to retry autoboot, if so just run it again. */
 700         for (;;) {
 701                 WATCHDOG_RESET ();
 702                 main_loop ();
 703         }
 704
 705         /* NOTREACHED - no way out of command loop except booting */
 706 }
 707
 708
 709 void hang(void)
 710 {
 711         puts ("### ERROR ### Please RESET the board ###\n");
 712         for (;;);
 713 }