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 #if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
83 (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
84 defined(CONFIG_ENV_IS_IN_NVRAM)
85 #define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
86 #else
87 #define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
88 #endif
89
90 extern ulong __init_end;
91 extern ulong _end;
92
93 extern void timer_init(void);
94
95 #if defined(CONFIG_WATCHDOG)
96 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
97 # define WATCHDOG_DISABLE watchdog_disable
98
99 extern int watchdog_init(void);
100 extern int watchdog_disable(void);
101 #else
102 # define INIT_FUNC_WATCHDOG_INIT /* undef */
103 # define WATCHDOG_DISABLE /* undef */
104 #endif /* CONFIG_WATCHDOG */
105
106 ulong monitor_flash_len;
107
108 /************************************************************************
109 * Utilities *
110 ************************************************************************
111 */
112
113 /*
114 * All attempts to come up with a "common" initialization sequence
115 * that works for all boards and architectures failed: some of the
116 * requirements are just _too_ different. To get rid of the resulting
117 * mess of board dependend #ifdef'ed code we now make the whole
118 * initialization sequence configurable to the user.
119 *
120 * The requirements for any new initalization function is simple: it
121 * receives a pointer to the "global data" structure as it's only
122 * argument, and returns an integer return code, where 0 means
123 * "continue" and != 0 means "fatal error, hang the system".
124 */
125 typedef int (init_fnc_t) (void);
126
127 /************************************************************************
128 * Init Utilities
129 ************************************************************************
130 * Some of this code should be moved into the core functions,
131 * but let's get it working (again) first...
132 */
133
init_baudrate(void)134 static int init_baudrate (void)
135 {
136 char tmp[64]; /* long enough for environment variables */
137 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
138
139 gd->baudrate = (i > 0)
140 ? (int) simple_strtoul (tmp, NULL, 10)
141 : CONFIG_BAUDRATE;
142 return (0);
143 }
144
145 /***********************************************************************/
146
init_func_ram(void)147 static int init_func_ram (void)
148 {
149 int board_type = 0; /* use dummy arg */
150 puts ("DRAM: ");
151
152 if ((gd->ram_size = initdram (board_type)) > 0) {
153 print_size (gd->ram_size, "\n");
154 return (0);
155 }
156 puts (failed);
157 return (1);
158 }
159
160 /***********************************************************************/
161
162 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
init_func_i2c(void)163 static int init_func_i2c (void)
164 {
165 puts ("I2C: ");
166 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
167 puts ("ready\n");
168 return (0);
169 }
170 #endif
171
172 #if defined(CONFIG_HARD_SPI)
init_func_spi(void)173 static int init_func_spi (void)
174 {
175 puts ("SPI: ");
176 spi_init ();
177 puts ("ready\n");
178 return (0);
179 }
180 #endif
181
182 /***********************************************************************/
183
184 /************************************************************************
185 * Initialization sequence *
186 ************************************************************************
187 */
188
189 init_fnc_t *init_sequence[] = {
190 get_clocks,
191 env_init,
192 init_baudrate,
193 serial_init,
194 console_init_f,
195 display_options,
196 checkcpu,
197 checkboard,
198 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
199 init_func_i2c,
200 #endif
201 #if defined(CONFIG_HARD_SPI)
202 init_func_spi,
203 #endif
204 init_func_ram,
205 #if defined(CONFIG_SYS_DRAM_TEST)
206 testdram,
207 #endif /* CONFIG_SYS_DRAM_TEST */
208 INIT_FUNC_WATCHDOG_INIT
209 NULL, /* Terminate this list */
210 };
211
212
213 /************************************************************************
214 *
215 * This is the first part of the initialization sequence that is
216 * implemented in C, but still running from ROM.
217 *
218 * The main purpose is to provide a (serial) console interface as
219 * soon as possible (so we can see any error messages), and to
220 * initialize the RAM so that we can relocate the monitor code to
221 * RAM.
222 *
223 * Be aware of the restrictions: global data is read-only, BSS is not
224 * initialized, and stack space is limited to a few kB.
225 *
226 ************************************************************************
227 */
228
229 void
board_init_f(ulong bootflag)230 board_init_f (ulong bootflag)
231 {
232 bd_t *bd;
233 ulong len, addr, addr_sp;
234 ulong *paddr;
235 gd_t *id;
236 init_fnc_t **init_fnc_ptr;
237 #ifdef CONFIG_PRAM
238 int i;
239 ulong reg;
240 char tmp[64]; /* long enough for environment variables */
241 #endif
242
243 /* Pointer is writable since we allocated a register for it */
244 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
245 /* compiler optimization barrier needed for GCC >= 3.4 */
246 __asm__ __volatile__("": : :"memory");
247
248 /* Clear initial global data */
249 memset ((void *) gd, 0, sizeof (gd_t));
250
251 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
252 if ((*init_fnc_ptr)() != 0) {
253 hang ();
254 }
255 }
256
257 /*
258 * Now that we have DRAM mapped and working, we can
259 * relocate the code and continue running from DRAM.
260 *
261 * Reserve memory at end of RAM for (top down in that order):
262 * - protected RAM
263 * - LCD framebuffer
264 * - monitor code
265 * - board info struct
266 */
267 len = (ulong)&_end - CONFIG_SYS_MONITOR_BASE;
268
269 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
270
271 #ifdef CONFIG_LOGBUFFER
272 /* reserve kernel log buffer */
273 addr -= (LOGBUFF_RESERVE);
274 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
275 #endif
276
277 #ifdef CONFIG_PRAM
278 /*
279 * reserve protected RAM
280 */
281 i = getenv_r ("pram", tmp, sizeof (tmp));
282 reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
283 addr -= (reg << 10); /* size is in kB */
284 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
285 #endif /* CONFIG_PRAM */
286
287 /* round down to next 4 kB limit */
288 addr &= ~(4096 - 1);
289 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
290
291 #ifdef CONFIG_LCD
292 /* reserve memory for LCD display (always full pages) */
293 addr = lcd_setmem (addr);
294 gd->fb_base = addr;
295 #endif /* CONFIG_LCD */
296
297 /*
298 * reserve memory for U-Boot code, data & bss
299 * round down to next 4 kB limit
300 */
301 addr -= len;
302 addr &= ~(4096 - 1);
303
304 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
305
306 /*
307 * reserve memory for malloc() arena
308 */
309 addr_sp = addr - TOTAL_MALLOC_LEN;
310 debug ("Reserving %dk for malloc() at: %08lx\n",
311 TOTAL_MALLOC_LEN >> 10, addr_sp);
312
313 /*
314 * (permanently) allocate a Board Info struct
315 * and a permanent copy of the "global" data
316 */
317 addr_sp -= sizeof (bd_t);
318 bd = (bd_t *) addr_sp;
319 gd->bd = bd;
320 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
321 sizeof (bd_t), addr_sp);
322 addr_sp -= sizeof (gd_t);
323 id = (gd_t *) addr_sp;
324 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
325 sizeof (gd_t), addr_sp);
326
327 /* Reserve memory for boot params. */
328 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
329 bd->bi_boot_params = addr_sp;
330 debug ("Reserving %dk for boot parameters at: %08lx\n",
331 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
332
333 /*
334 * Finally, we set up a new (bigger) stack.
335 *
336 * Leave some safety gap for SP, force alignment on 16 byte boundary
337 * Clear initial stack frame
338 */
339 addr_sp -= 16;
340 addr_sp &= ~0xF;
341
342 paddr = (ulong *)addr_sp;
343 *paddr-- = 0;
344 *paddr-- = 0;
345 addr_sp = (ulong)paddr;
346
347 debug ("Stack Pointer at: %08lx\n", addr_sp);
348
349 /*
350 * Save local variables to board info struct
351 */
352 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
353 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
354 #ifdef CONFIG_SYS_INIT_RAM_ADDR
355 bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR; /* start of SRAM memory */
356 bd->bi_sramsize = CONFIG_SYS_INIT_RAM_END; /* size of SRAM memory */
357 #endif
358 bd->bi_mbar_base = CONFIG_SYS_MBAR; /* base of internal registers */
359
360 bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
361
362 WATCHDOG_RESET ();
363 bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
364 bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
365 #ifdef CONFIG_PCI
366 bd->bi_pcifreq = gd->pci_clk; /* PCI Freq in Hz */
367 #endif
368 #ifdef CONFIG_EXTRA_CLOCK
369 bd->bi_inpfreq = gd->inp_clk; /* input Freq in Hz */
370 bd->bi_vcofreq = gd->vco_clk; /* vco Freq in Hz */
371 bd->bi_flbfreq = gd->flb_clk; /* flexbus Freq in Hz */
372 #endif
373 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
374
375 #ifdef CONFIG_SYS_EXTBDINFO
376 strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
377 strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
378 #endif
379
380 WATCHDOG_RESET ();
381
382 #ifdef CONFIG_POST
383 post_bootmode_init();
384 post_run (NULL, POST_ROM | post_bootmode_get(0));
385 #endif
386
387 WATCHDOG_RESET();
388
389 memcpy (id, (void *)gd, sizeof (gd_t));
390
391 debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
392 relocate_code (addr_sp, id, addr);
393
394 /* NOTREACHED - jump_to_ram() does not return */
395 }
396
397 /************************************************************************
398 *
399 * This is the next part if the initialization sequence: we are now
400 * running from RAM and have a "normal" C environment, i. e. global
401 * data can be written, BSS has been cleared, the stack size in not
402 * that critical any more, etc.
403 *
404 ************************************************************************
405 */
board_init_r(gd_t * id,ulong dest_addr)406 void board_init_r (gd_t *id, ulong dest_addr)
407 {
408 cmd_tbl_t *cmdtp;
409 char *s;
410 bd_t *bd;
411 extern void malloc_bin_reloc (void);
412
413 #ifndef CONFIG_ENV_IS_NOWHERE
414 extern char * env_name_spec;
415 #endif
416 #ifndef CONFIG_SYS_NO_FLASH
417 ulong flash_size;
418 #endif
419 gd = id; /* initialize RAM version of global data */
420 bd = gd->bd;
421
422 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
423
424 #ifdef CONFIG_SERIAL_MULTI
425 serial_initialize();
426 #endif
427
428 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
429
430 WATCHDOG_RESET ();
431
432 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
433
434 monitor_flash_len = (ulong)&__init_end - dest_addr;
435
436 /*
437 * We have to relocate the command table manually
438 */
439 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
440 ulong addr;
441 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
442 #if 0
443 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
444 cmdtp->name, (ulong) (cmdtp->cmd), addr);
445 #endif
446 cmdtp->cmd =
447 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
448
449 addr = (ulong)(cmdtp->name) + gd->reloc_off;
450 cmdtp->name = (char *)addr;
451
452 if (cmdtp->usage) {
453 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
454 cmdtp->usage = (char *)addr;
455 }
456 #ifdef CONFIG_SYS_LONGHELP
457 if (cmdtp->help) {
458 addr = (ulong)(cmdtp->help) + gd->reloc_off;
459 cmdtp->help = (char *)addr;
460 }
461 #endif
462 }
463 /* there are some other pointer constants we must deal with */
464 #ifndef CONFIG_ENV_IS_NOWHERE
465 env_name_spec += gd->reloc_off;
466 #endif
467
468 WATCHDOG_RESET ();
469
470 #ifdef CONFIG_LOGBUFFER
471 logbuff_init_ptrs ();
472 #endif
473 #ifdef CONFIG_POST
474 post_output_backlog ();
475 post_reloc ();
476 #endif
477 WATCHDOG_RESET();
478
479 #if 0
480 /* instruction cache enabled in cpu_init_f() for faster relocation */
481 icache_enable (); /* it's time to enable the instruction cache */
482 #endif
483
484 /*
485 * Setup trap handlers
486 */
487 trap_init (CONFIG_SYS_SDRAM_BASE);
488
489 /* The Malloc area is immediately below the monitor copy in DRAM */
490 mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
491 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
492 malloc_bin_reloc ();
493
494 #if !defined(CONFIG_SYS_NO_FLASH)
495 puts ("FLASH: ");
496
497 if ((flash_size = flash_init ()) > 0) {
498 # ifdef CONFIG_SYS_FLASH_CHECKSUM
499 print_size (flash_size, "");
500 /*
501 * Compute and print flash CRC if flashchecksum is set to 'y'
502 *
503 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
504 */
505 s = getenv ("flashchecksum");
506 if (s && (*s == 'y')) {
507 printf (" CRC: %08X",
508 crc32 (0,
509 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
510 flash_size)
511 );
512 }
513 putc ('\n');
514 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
515 print_size (flash_size, "\n");
516 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
517 } else {
518 puts (failed);
519 hang ();
520 }
521
522 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
523 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
524 bd->bi_flashoffset = 0;
525 #else /* CONFIG_SYS_NO_FLASH */
526 bd->bi_flashsize = 0;
527 bd->bi_flashstart = 0;
528 bd->bi_flashoffset = 0;
529 #endif /* !CONFIG_SYS_NO_FLASH */
530
531 WATCHDOG_RESET ();
532
533 /* initialize higher level parts of CPU like time base and timers */
534 cpu_init_r ();
535
536 WATCHDOG_RESET ();
537
538 #ifdef CONFIG_SPI
539 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
540 spi_init_f ();
541 # endif
542 spi_init_r ();
543 #endif
544
545 /* relocate environment function pointers etc. */
546 env_relocate ();
547
548 /*
549 * Fill in missing fields of bd_info.
550 * We do this here, where we have "normal" access to the
551 * environment; we used to do this still running from ROM,
552 * where had to use getenv_r(), which can be pretty slow when
553 * the environment is in EEPROM.
554 */
555 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
556
557 WATCHDOG_RESET ();
558
559 #if defined(CONFIG_PCI)
560 /*
561 * Do pci configuration
562 */
563 pci_init ();
564 #endif
565
566 /** leave this here (after malloc(), environment and PCI are working) **/
567 /* Initialize stdio devices */
568 stdio_init ();
569
570 /* Initialize the jump table for applications */
571 jumptable_init ();
572
573 /* Initialize the console (after the relocation and devices init) */
574 console_init_r ();
575
576 #if defined(CONFIG_MISC_INIT_R)
577 /* miscellaneous platform dependent initialisations */
578 misc_init_r ();
579 #endif
580
581 #if defined(CONFIG_CMD_KGDB)
582 WATCHDOG_RESET ();
583 puts ("KGDB: ");
584 kgdb_init ();
585 #endif
586
587 debug ("U-Boot relocated to %08lx\n", dest_addr);
588
589 /*
590 * Enable Interrupts
591 */
592 interrupt_init ();
593
594 /* Must happen after interrupts are initialized since
595 * an irq handler gets installed
596 */
597 timer_init();
598
599 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
600 serial_buffered_init();
601 #endif
602
603 #ifdef CONFIG_STATUS_LED
604 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
605 #endif
606
607 udelay (20);
608
609 set_timer (0);
610
611 /* Insert function pointers now that we have relocated the code */
612
613 /* Initialize from environment */
614 if ((s = getenv ("loadaddr")) != NULL) {
615 load_addr = simple_strtoul (s, NULL, 16);
616 }
617 #if defined(CONFIG_CMD_NET)
618 if ((s = getenv ("bootfile")) != NULL) {
619 copy_filename (BootFile, s, sizeof (BootFile));
620 }
621 #endif
622
623 WATCHDOG_RESET ();
624
625 #if defined(CONFIG_CMD_DOC)
626 WATCHDOG_RESET ();
627 puts ("DOC: ");
628 doc_init ();
629 #endif
630
631 #if defined(CONFIG_CMD_NAND)
632 WATCHDOG_RESET ();
633 puts ("NAND: ");
634 nand_init(); /* go init the NAND */
635 #endif
636
637 #ifdef CONFIG_BITBANGMII
638 bb_miiphy_init();
639 #endif
640 #if defined(CONFIG_CMD_NET)
641 WATCHDOG_RESET();
642 #if defined(FEC_ENET)
643 eth_init(bd);
644 #endif
645 #if defined(CONFIG_NET_MULTI)
646 puts ("Net: ");
647 eth_initialize (bd);
648 #endif
649 #endif
650
651 #ifdef CONFIG_POST
652 post_run (NULL, POST_RAM | post_bootmode_get(0));
653 #endif
654
655 #if defined(CONFIG_CMD_PCMCIA) \
656 && !defined(CONFIG_CMD_IDE)
657 WATCHDOG_RESET ();
658 puts ("PCMCIA:");
659 pcmcia_init ();
660 #endif
661
662 #if defined(CONFIG_CMD_IDE)
663 WATCHDOG_RESET ();
664 puts ("IDE: ");
665 ide_init ();
666 #endif
667
668 #ifdef CONFIG_LAST_STAGE_INIT
669 WATCHDOG_RESET ();
670 /*
671 * Some parts can be only initialized if all others (like
672 * Interrupts) are up and running (i.e. the PC-style ISA
673 * keyboard).
674 */
675 last_stage_init ();
676 #endif
677
678 #if defined(CONFIG_CMD_BEDBUG)
679 WATCHDOG_RESET ();
680 bedbug_init ();
681 #endif
682
683 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
684 /*
685 * Export available size of memory for Linux,
686 * taking into account the protected RAM at top of memory
687 */
688 {
689 ulong pram;
690 char memsz[32];
691 #ifdef CONFIG_PRAM
692 char *s;
693
694 if ((s = getenv ("pram")) != NULL) {
695 pram = simple_strtoul (s, NULL, 10);
696 } else {
697 pram = CONFIG_PRAM;
698 }
699 #else
700 pram=0;
701 #endif
702 #ifdef CONFIG_LOGBUFFER
703 /* Also take the logbuffer into account (pram is in kB) */
704 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
705 #endif
706 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
707 setenv ("mem", memsz);
708 }
709 #endif
710
711 #ifdef CONFIG_MODEM_SUPPORT
712 {
713 extern int do_mdm_init;
714 do_mdm_init = gd->do_mdm_init;
715 }
716 #endif
717
718 #ifdef CONFIG_WATCHDOG
719 /* disable watchdog if environment is set */
720 if ((s = getenv ("watchdog")) != NULL) {
721 if (strncmp (s, "off", 3) == 0) {
722 WATCHDOG_DISABLE ();
723 }
724 }
725 #endif /* CONFIG_WATCHDOG*/
726
727
728 /* Initialization complete - start the monitor */
729
730 /* main_loop() can return to retry autoboot, if so just run it again. */
731 for (;;) {
732 WATCHDOG_RESET ();
733 main_loop ();
734 }
735
736 /* NOTREACHED - no way out of command loop except booting */
737 }
738
739
hang(void)740 void hang(void)
741 {
742 puts ("### ERROR ### Please RESET the board ###\n");
743 for (;;);
744 }
745