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 */
27 #include <common.h>
28 #include <watchdog.h>
29 #include <command.h>
30 #include <malloc.h>
31 #include <stdio_dev.h>
32 #include <linux/compiler.h>
34 #include <asm/immap.h>
36 #if defined(CONFIG_CMD_IDE)
37 #include <ide.h>
38 #endif
39 #if defined(CONFIG_CMD_SCSI)
40 #include <scsi.h>
41 #endif
42 #if defined(CONFIG_CMD_KGDB)
43 #include <kgdb.h>
44 #endif
45 #ifdef CONFIG_STATUS_LED
46 #include <status_led.h>
47 #endif
48 #include <net.h>
49 #include <serial.h>
50 #if defined(CONFIG_CMD_BEDBUG)
51 #include <cmd_bedbug.h>
52 #endif
53 #ifdef CONFIG_SYS_ALLOC_DPRAM
54 #include <commproc.h>
55 #endif
56 #include <version.h>
58 #if defined(CONFIG_HARD_I2C) || \
59 defined(CONFIG_SOFT_I2C)
60 #include <i2c.h>
61 #endif
63 #ifdef CONFIG_CMD_SPI
64 #include <spi.h>
65 #endif
67 #ifdef CONFIG_BITBANGMII
68 #include <miiphy.h>
69 #endif
71 #include <nand.h>
73 DECLARE_GLOBAL_DATA_PTR;
75 static char *failed = "*** failed ***\n";
77 #include <environment.h>
79 extern ulong __init_end;
80 extern ulong __bss_end__;
82 #if defined(CONFIG_WATCHDOG)
83 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
84 # define WATCHDOG_DISABLE watchdog_disable
86 extern int watchdog_init(void);
87 extern int watchdog_disable(void);
88 #else
89 # define INIT_FUNC_WATCHDOG_INIT /* undef */
90 # define WATCHDOG_DISABLE /* undef */
91 #endif /* CONFIG_WATCHDOG */
93 ulong monitor_flash_len;
95 /************************************************************************
96 * Utilities *
97 ************************************************************************
98 */
100 /*
101 * All attempts to come up with a "common" initialization sequence
102 * that works for all boards and architectures failed: some of the
103 * requirements are just _too_ different. To get rid of the resulting
104 * mess of board dependend #ifdef'ed code we now make the whole
105 * initialization sequence configurable to the user.
106 *
107 * The requirements for any new initalization function is simple: it
108 * receives a pointer to the "global data" structure as it's only
109 * argument, and returns an integer return code, where 0 means
110 * "continue" and != 0 means "fatal error, hang the system".
111 */
112 typedef int (init_fnc_t) (void);
114 /************************************************************************
115 * Init Utilities
116 ************************************************************************
117 * Some of this code should be moved into the core functions,
118 * but let's get it working (again) first...
119 */
121 static int init_baudrate (void)
122 {
123 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
124 return 0;
125 }
127 /***********************************************************************/
129 static int init_func_ram (void)
130 {
131 int board_type = 0; /* use dummy arg */
132 puts ("DRAM: ");
134 if ((gd->ram_size = initdram (board_type)) > 0) {
135 print_size (gd->ram_size, "\n");
136 return (0);
137 }
138 puts (failed);
139 return (1);
140 }
142 /***********************************************************************/
144 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
145 static int init_func_i2c (void)
146 {
147 puts ("I2C: ");
148 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
149 puts ("ready\n");
150 return (0);
151 }
152 #endif
154 #if defined(CONFIG_HARD_SPI)
155 static int init_func_spi (void)
156 {
157 puts ("SPI: ");
158 spi_init ();
159 puts ("ready\n");
160 return (0);
161 }
162 #endif
164 /***********************************************************************/
166 /************************************************************************
167 * Initialization sequence *
168 ************************************************************************
169 */
171 init_fnc_t *init_sequence[] = {
172 get_clocks,
173 env_init,
174 init_baudrate,
175 serial_init,
176 console_init_f,
177 display_options,
178 checkcpu,
179 checkboard,
180 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
181 init_func_i2c,
182 #endif
183 #if defined(CONFIG_HARD_SPI)
184 init_func_spi,
185 #endif
186 init_func_ram,
187 #if defined(CONFIG_SYS_DRAM_TEST)
188 testdram,
189 #endif /* CONFIG_SYS_DRAM_TEST */
190 INIT_FUNC_WATCHDOG_INIT
191 NULL, /* Terminate this list */
192 };
195 /************************************************************************
196 *
197 * This is the first part of the initialization sequence that is
198 * implemented in C, but still running from ROM.
199 *
200 * The main purpose is to provide a (serial) console interface as
201 * soon as possible (so we can see any error messages), and to
202 * initialize the RAM so that we can relocate the monitor code to
203 * RAM.
204 *
205 * Be aware of the restrictions: global data is read-only, BSS is not
206 * initialized, and stack space is limited to a few kB.
207 *
208 ************************************************************************
209 */
211 void
212 board_init_f (ulong bootflag)
213 {
214 bd_t *bd;
215 ulong len, addr, addr_sp;
216 ulong *paddr;
217 gd_t *id;
218 init_fnc_t **init_fnc_ptr;
219 #ifdef CONFIG_PRAM
220 ulong reg;
221 #endif
223 /* Pointer is writable since we allocated a register for it */
224 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
225 /* compiler optimization barrier needed for GCC >= 3.4 */
226 __asm__ __volatile__("": : :"memory");
228 /* Clear initial global data */
229 memset ((void *) gd, 0, sizeof (gd_t));
231 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
232 if ((*init_fnc_ptr)() != 0) {
233 hang ();
234 }
235 }
237 /*
238 * Now that we have DRAM mapped and working, we can
239 * relocate the code and continue running from DRAM.
240 *
241 * Reserve memory at end of RAM for (top down in that order):
242 * - protected RAM
243 * - LCD framebuffer
244 * - monitor code
245 * - board info struct
246 */
247 len = (ulong)&__bss_end__ - CONFIG_SYS_MONITOR_BASE;
249 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
251 #ifdef CONFIG_LOGBUFFER
252 /* reserve kernel log buffer */
253 addr -= (LOGBUFF_RESERVE);
254 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
255 #endif
257 #ifdef CONFIG_PRAM
258 /*
259 * reserve protected RAM
260 */
261 reg = getenv_ulong("pram", 10, CONFIG_PRAM);
262 addr -= (reg << 10); /* size is in kB */
263 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
264 #endif /* CONFIG_PRAM */
266 /* round down to next 4 kB limit */
267 addr &= ~(4096 - 1);
268 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
270 #ifdef CONFIG_LCD
271 #ifdef CONFIG_FB_ADDR
272 gd->fb_base = CONFIG_FB_ADDR;
273 #else
274 /* reserve memory for LCD display (always full pages) */
275 addr = lcd_setmem (addr);
276 gd->fb_base = addr;
277 #endif /* CONFIG_FB_ADDR */
278 #endif /* CONFIG_LCD */
280 /*
281 * reserve memory for U-Boot code, data & bss
282 * round down to next 4 kB limit
283 */
284 addr -= len;
285 addr &= ~(4096 - 1);
287 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
289 /*
290 * reserve memory for malloc() arena
291 */
292 addr_sp = addr - TOTAL_MALLOC_LEN;
293 debug ("Reserving %dk for malloc() at: %08lx\n",
294 TOTAL_MALLOC_LEN >> 10, addr_sp);
296 /*
297 * (permanently) allocate a Board Info struct
298 * and a permanent copy of the "global" data
299 */
300 addr_sp -= sizeof (bd_t);
301 bd = (bd_t *) addr_sp;
302 gd->bd = bd;
303 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
304 sizeof (bd_t), addr_sp);
305 addr_sp -= sizeof (gd_t);
306 id = (gd_t *) addr_sp;
307 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
308 sizeof (gd_t), addr_sp);
310 /* Reserve memory for boot params. */
311 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
312 bd->bi_boot_params = addr_sp;
313 debug ("Reserving %dk for boot parameters at: %08lx\n",
314 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
316 /*
317 * Finally, we set up a new (bigger) stack.
318 *
319 * Leave some safety gap for SP, force alignment on 16 byte boundary
320 * Clear initial stack frame
321 */
322 addr_sp -= 16;
323 addr_sp &= ~0xF;
325 paddr = (ulong *)addr_sp;
326 *paddr-- = 0;
327 *paddr-- = 0;
328 addr_sp = (ulong)paddr;
330 debug ("Stack Pointer at: %08lx\n", addr_sp);
332 /*
333 * Save local variables to board info struct
334 */
335 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
336 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
337 #ifdef CONFIG_SYS_INIT_RAM_ADDR
338 bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR; /* start of SRAM memory */
339 bd->bi_sramsize = CONFIG_SYS_INIT_RAM_SIZE; /* size of SRAM memory */
340 #endif
341 bd->bi_mbar_base = CONFIG_SYS_MBAR; /* base of internal registers */
343 bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
345 WATCHDOG_RESET ();
346 bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
347 bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
348 #ifdef CONFIG_PCI
349 bd->bi_pcifreq = gd->pci_clk; /* PCI Freq in Hz */
350 #endif
351 #ifdef CONFIG_EXTRA_CLOCK
352 bd->bi_inpfreq = gd->arch.inp_clk; /* input Freq in Hz */
353 bd->bi_vcofreq = gd->arch.vco_clk; /* vco Freq in Hz */
354 bd->bi_flbfreq = gd->arch.flb_clk; /* flexbus Freq in Hz */
355 #endif
356 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
358 #ifdef CONFIG_SYS_EXTBDINFO
359 strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
360 strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
361 #endif
363 WATCHDOG_RESET ();
365 #ifdef CONFIG_POST
366 post_bootmode_init();
367 post_run (NULL, POST_ROM | post_bootmode_get(0));
368 #endif
370 WATCHDOG_RESET();
372 memcpy (id, (void *)gd, sizeof (gd_t));
374 debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
375 relocate_code (addr_sp, id, addr);
377 /* NOTREACHED - jump_to_ram() does not return */
378 }
380 /************************************************************************
381 *
382 * This is the next part if the initialization sequence: we are now
383 * running from RAM and have a "normal" C environment, i. e. global
384 * data can be written, BSS has been cleared, the stack size in not
385 * that critical any more, etc.
386 *
387 ************************************************************************
388 */
389 void board_init_r (gd_t *id, ulong dest_addr)
390 {
391 char *s __maybe_unused;
392 bd_t *bd;
394 #ifndef CONFIG_ENV_IS_NOWHERE
395 extern char * env_name_spec;
396 #endif
397 #ifndef CONFIG_SYS_NO_FLASH
398 ulong flash_size;
399 #endif
400 gd = id; /* initialize RAM version of global data */
401 bd = gd->bd;
403 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
405 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
407 WATCHDOG_RESET ();
409 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
411 serial_initialize();
413 monitor_flash_len = (ulong)&__init_end - dest_addr;
415 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
416 /*
417 * We have to relocate the command table manually
418 */
419 fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
420 ll_entry_count(cmd_tbl_t, cmd));
421 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
423 /* there are some other pointer constants we must deal with */
424 #ifndef CONFIG_ENV_IS_NOWHERE
425 env_name_spec += gd->reloc_off;
426 #endif
428 WATCHDOG_RESET ();
430 #ifdef CONFIG_LOGBUFFER
431 logbuff_init_ptrs ();
432 #endif
433 #ifdef CONFIG_POST
434 post_output_backlog ();
435 post_reloc ();
436 #endif
437 WATCHDOG_RESET();
439 #if 0
440 /* instruction cache enabled in cpu_init_f() for faster relocation */
441 icache_enable (); /* it's time to enable the instruction cache */
442 #endif
444 /*
445 * Setup trap handlers
446 */
447 trap_init (CONFIG_SYS_SDRAM_BASE);
449 /* The Malloc area is immediately below the monitor copy in DRAM */
450 mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
451 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
453 #if !defined(CONFIG_SYS_NO_FLASH)
454 puts ("Flash: ");
456 if ((flash_size = flash_init ()) > 0) {
457 # ifdef CONFIG_SYS_FLASH_CHECKSUM
458 print_size (flash_size, "");
459 /*
460 * Compute and print flash CRC if flashchecksum is set to 'y'
461 *
462 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
463 */
464 if (getenv_yesno("flashchecksum") == 1) {
465 printf (" CRC: %08X",
466 crc32 (0,
467 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
468 flash_size)
469 );
470 }
471 putc ('\n');
472 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
473 print_size (flash_size, "\n");
474 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
475 } else {
476 puts (failed);
477 hang ();
478 }
480 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
481 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
482 bd->bi_flashoffset = 0;
483 #else /* CONFIG_SYS_NO_FLASH */
484 bd->bi_flashsize = 0;
485 bd->bi_flashstart = 0;
486 bd->bi_flashoffset = 0;
487 #endif /* !CONFIG_SYS_NO_FLASH */
489 WATCHDOG_RESET ();
491 /* initialize higher level parts of CPU like time base and timers */
492 cpu_init_r ();
494 WATCHDOG_RESET ();
496 #ifdef CONFIG_SPI
497 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
498 spi_init_f ();
499 # endif
500 spi_init_r ();
501 #endif
503 /* relocate environment function pointers etc. */
504 env_relocate ();
506 WATCHDOG_RESET ();
508 #if defined(CONFIG_PCI)
509 /*
510 * Do pci configuration
511 */
512 pci_init ();
513 #endif
515 /** leave this here (after malloc(), environment and PCI are working) **/
516 /* Initialize stdio devices */
517 stdio_init ();
519 /* Initialize the jump table for applications */
520 jumptable_init ();
522 /* Initialize the console (after the relocation and devices init) */
523 console_init_r ();
525 #if defined(CONFIG_MISC_INIT_R)
526 /* miscellaneous platform dependent initialisations */
527 misc_init_r ();
528 #endif
530 #if defined(CONFIG_CMD_KGDB)
531 WATCHDOG_RESET ();
532 puts ("KGDB: ");
533 kgdb_init ();
534 #endif
536 debug ("U-Boot relocated to %08lx\n", dest_addr);
538 /*
539 * Enable Interrupts
540 */
541 interrupt_init ();
543 /* Must happen after interrupts are initialized since
544 * an irq handler gets installed
545 */
546 timer_init();
548 #ifdef CONFIG_STATUS_LED
549 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
550 #endif
552 udelay (20);
554 /* Insert function pointers now that we have relocated the code */
556 /* Initialize from environment */
557 load_addr = getenv_ulong("loadaddr", 16, load_addr);
559 WATCHDOG_RESET ();
561 #if defined(CONFIG_CMD_DOC)
562 WATCHDOG_RESET ();
563 puts ("DOC: ");
564 doc_init ();
565 #endif
567 #if defined(CONFIG_CMD_NAND)
568 WATCHDOG_RESET ();
569 puts ("NAND: ");
570 nand_init(); /* go init the NAND */
571 #endif
573 #ifdef CONFIG_BITBANGMII
574 bb_miiphy_init();
575 #endif
576 #if defined(CONFIG_CMD_NET)
577 WATCHDOG_RESET();
578 #if defined(FEC_ENET)
579 eth_init(bd);
580 #endif
581 puts ("Net: ");
582 eth_initialize (bd);
583 #endif
585 #ifdef CONFIG_POST
586 post_run (NULL, POST_RAM | post_bootmode_get(0));
587 #endif
589 #if defined(CONFIG_CMD_PCMCIA) \
590 && !defined(CONFIG_CMD_IDE)
591 WATCHDOG_RESET ();
592 puts ("PCMCIA:");
593 pcmcia_init ();
594 #endif
596 #if defined(CONFIG_CMD_IDE)
597 WATCHDOG_RESET ();
598 puts ("IDE: ");
599 ide_init ();
600 #endif
602 #ifdef CONFIG_LAST_STAGE_INIT
603 WATCHDOG_RESET ();
604 /*
605 * Some parts can be only initialized if all others (like
606 * Interrupts) are up and running (i.e. the PC-style ISA
607 * keyboard).
608 */
609 last_stage_init ();
610 #endif
612 #if defined(CONFIG_CMD_BEDBUG)
613 WATCHDOG_RESET ();
614 bedbug_init ();
615 #endif
617 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
618 /*
619 * Export available size of memory for Linux,
620 * taking into account the protected RAM at top of memory
621 */
622 {
623 ulong pram = 0;
624 char memsz[32];
626 #ifdef CONFIG_PRAM
627 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
628 #endif
629 #ifdef CONFIG_LOGBUFFER
630 /* Also take the logbuffer into account (pram is in kB) */
631 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
632 #endif
633 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
634 setenv ("mem", memsz);
635 }
636 #endif
638 #ifdef CONFIG_MODEM_SUPPORT
639 {
640 extern int do_mdm_init;
641 do_mdm_init = gd->do_mdm_init;
642 }
643 #endif
645 #ifdef CONFIG_WATCHDOG
646 /* disable watchdog if environment is set */
647 if ((s = getenv ("watchdog")) != NULL) {
648 if (strncmp (s, "off", 3) == 0) {
649 WATCHDOG_DISABLE ();
650 }
651 }
652 #endif /* CONFIG_WATCHDOG*/
655 /* Initialization complete - start the monitor */
657 /* main_loop() can return to retry autoboot, if so just run it again. */
658 for (;;) {
659 WATCHDOG_RESET ();
660 main_loop ();
661 }
663 /* NOTREACHED - no way out of command loop except booting */
664 }
667 void hang(void)
668 {
669 puts ("### ERROR ### Please RESET the board ###\n");
670 for (;;);
671 }