3 * Josef Baumgartner <josef.baumgartner@telex.de>
5 * (C) Copyright 2000-2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * See file CREDITS for list of people who contributed to this
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.
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.
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,
34 #include <asm/immap_5272.h>
37 #if (CONFIG_COMMANDS & CFG_CMD_IDE)
40 #if (CONFIG_COMMANDS & CFG_CMD_SCSI)
43 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
46 #ifdef CONFIG_STATUS_LED
47 #include <status_led.h>
50 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
51 #include <cmd_bedbug.h>
53 #ifdef CFG_ALLOC_DPRAM
58 #if defined(CONFIG_HARD_I2C) || \
59 defined(CONFIG_SOFT_I2C)
63 DECLARE_GLOBAL_DATA_PTR;
65 static char *failed = "*** failed ***\n";
68 extern flash_info_t flash_info[];
71 #include <environment.h>
73 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
74 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
75 defined(CFG_ENV_IS_IN_NVRAM)
76 #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
78 #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
81 extern ulong __init_end;
84 extern void timer_init(void);
86 #if defined(CONFIG_WATCHDOG)
87 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
88 # define WATCHDOG_DISABLE watchdog_disable
90 extern int watchdog_init(void);
91 extern int watchdog_disable(void);
93 # define INIT_FUNC_WATCHDOG_INIT /* undef */
94 # define WATCHDOG_DISABLE /* undef */
95 #endif /* CONFIG_WATCHDOG */
97 ulong monitor_flash_len;
100 * Begin and End of memory area for malloc(), and current "brk"
102 static ulong mem_malloc_start = 0;
103 static ulong mem_malloc_end = 0;
104 static ulong mem_malloc_brk = 0;
106 /************************************************************************
108 ************************************************************************
112 * The Malloc area is immediately below the monitor copy in DRAM
114 static void mem_malloc_init (void)
116 ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
118 mem_malloc_end = dest_addr;
119 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
120 mem_malloc_brk = mem_malloc_start;
122 memset ((void *) mem_malloc_start,
124 mem_malloc_end - mem_malloc_start);
127 void *sbrk (ptrdiff_t increment)
129 ulong old = mem_malloc_brk;
130 ulong new = old + increment;
132 if ((new < mem_malloc_start) ||
133 (new > mem_malloc_end) ) {
136 mem_malloc_brk = new;
137 return ((void *)old);
140 char *strmhz(char *buf, long hz)
147 l = sprintf (buf, "%ld", n);
149 m = (hz % 1000000L) / 1000L;
152 sprintf (buf+l, ".%03ld", m);
158 * All attempts to come up with a "common" initialization sequence
159 * that works for all boards and architectures failed: some of the
160 * requirements are just _too_ different. To get rid of the resulting
161 * mess of board dependend #ifdef'ed code we now make the whole
162 * initialization sequence configurable to the user.
164 * The requirements for any new initalization function is simple: it
165 * receives a pointer to the "global data" structure as it's only
166 * argument, and returns an integer return code, where 0 means
167 * "continue" and != 0 means "fatal error, hang the system".
169 typedef int (init_fnc_t) (void);
171 /************************************************************************
173 ************************************************************************
174 * Some of this code should be moved into the core functions,
175 * but let's get it working (again) first...
178 static int init_baudrate (void)
180 uchar tmp[64]; /* long enough for environment variables */
181 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
183 gd->baudrate = (i > 0)
184 ? (int) simple_strtoul (tmp, NULL, 10)
189 /***********************************************************************/
191 static int init_func_ram (void)
193 int board_type = 0; /* use dummy arg */
196 if ((gd->ram_size = initdram (board_type)) > 0) {
197 print_size (gd->ram_size, "\n");
204 /***********************************************************************/
206 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
207 static int init_func_i2c (void)
210 i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
216 /***********************************************************************/
218 /************************************************************************
219 * Initialization sequence *
220 ************************************************************************
223 init_fnc_t *init_sequence[] = {
231 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
235 #if defined(CFG_DRAM_TEST)
237 #endif /* CFG_DRAM_TEST */
238 INIT_FUNC_WATCHDOG_INIT
239 NULL, /* Terminate this list */
243 /************************************************************************
245 * This is the first part of the initialization sequence that is
246 * implemented in C, but still running from ROM.
248 * The main purpose is to provide a (serial) console interface as
249 * soon as possible (so we can see any error messages), and to
250 * initialize the RAM so that we can relocate the monitor code to
253 * Be aware of the restrictions: global data is read-only, BSS is not
254 * initialized, and stack space is limited to a few kB.
256 ************************************************************************
260 board_init_f (ulong bootflag)
263 ulong len, addr, addr_sp;
265 init_fnc_t **init_fnc_ptr;
269 uchar tmp[64]; /* long enough for environment variables */
272 /* Pointer is writable since we allocated a register for it */
273 gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
274 /* compiler optimization barrier needed for GCC >= 3.4 */
275 __asm__ __volatile__("": : :"memory");
277 /* Clear initial global data */
278 memset ((void *) gd, 0, sizeof (gd_t));
280 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
281 if ((*init_fnc_ptr)() != 0) {
287 * Now that we have DRAM mapped and working, we can
288 * relocate the code and continue running from DRAM.
290 * Reserve memory at end of RAM for (top down in that order):
294 * - board info struct
296 len = (ulong)&_end - CFG_MONITOR_BASE;
298 addr = CFG_SDRAM_BASE + gd->ram_size;
300 #ifdef CONFIG_LOGBUFFER
301 /* reserve kernel log buffer */
302 addr -= (LOGBUFF_RESERVE);
303 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
308 * reserve protected RAM
310 i = getenv_r ("pram", tmp, sizeof (tmp));
311 reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
312 addr -= (reg << 10); /* size is in kB */
313 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
314 #endif /* CONFIG_PRAM */
317 * reserve memory for U-Boot code, data & bss
318 * round down to next 4 kB limit
323 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
326 * reserve memory for malloc() arena
328 addr_sp = addr - TOTAL_MALLOC_LEN;
329 debug ("Reserving %dk for malloc() at: %08lx\n",
330 TOTAL_MALLOC_LEN >> 10, addr_sp);
333 * (permanently) allocate a Board Info struct
334 * and a permanent copy of the "global" data
336 addr_sp -= sizeof (bd_t);
337 bd = (bd_t *) addr_sp;
339 debug ("Reserving %d Bytes for Board Info at: %08lx\n",
340 sizeof (bd_t), addr_sp);
341 addr_sp -= sizeof (gd_t);
342 id = (gd_t *) addr_sp;
343 debug ("Reserving %d Bytes for Global Data at: %08lx\n",
344 sizeof (gd_t), addr_sp);
346 /* Reserve memory for boot params. */
347 addr_sp -= CFG_BOOTPARAMS_LEN;
348 bd->bi_boot_params = addr_sp;
349 debug ("Reserving %dk for boot parameters at: %08lx\n",
350 CFG_BOOTPARAMS_LEN >> 10, addr_sp);
353 * Finally, we set up a new (bigger) stack.
355 * Leave some safety gap for SP, force alignment on 16 byte boundary
356 * Clear initial stack frame
360 *((ulong *) addr_sp)-- = 0;
361 *((ulong *) addr_sp)-- = 0;
362 debug ("Stack Pointer at: %08lx\n", addr_sp);
365 * Save local variables to board info struct
367 bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
368 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
369 bd->bi_mbar_base = CFG_MBAR; /* base of internal registers */
371 bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
374 bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
375 bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
376 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
379 strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
380 strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
386 post_bootmode_init();
387 post_run (NULL, POST_ROM | post_bootmode_get(0));
392 memcpy (id, (void *)gd, sizeof (gd_t));
394 debug ("Start relocate of code from %08x to %08lx\n", CFG_MONITOR_BASE, addr);
395 relocate_code (addr_sp, id, addr);
397 /* NOTREACHED - jump_to_ram() does not return */
400 /************************************************************************
402 * This is the next part if the initialization sequence: we are now
403 * running from RAM and have a "normal" C environment, i. e. global
404 * data can be written, BSS has been cleared, the stack size in not
405 * that critical any more, etc.
407 ************************************************************************
409 void board_init_r (gd_t *id, ulong dest_addr)
415 extern void malloc_bin_reloc (void);
417 #ifndef CFG_ENV_IS_NOWHERE
418 extern char * env_name_spec;
423 gd = id; /* initialize RAM version of global data */
426 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
428 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
432 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
434 monitor_flash_len = (ulong)&__init_end - dest_addr;
437 * We have to relocate the command table manually
439 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
441 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
443 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
444 cmdtp->name, (ulong) (cmdtp->cmd), addr);
447 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
449 addr = (ulong)(cmdtp->name) + gd->reloc_off;
450 cmdtp->name = (char *)addr;
453 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
454 cmdtp->usage = (char *)addr;
458 addr = (ulong)(cmdtp->help) + gd->reloc_off;
459 cmdtp->help = (char *)addr;
463 /* there are some other pointer constants we must deal with */
464 #ifndef CFG_ENV_IS_NOWHERE
465 env_name_spec += gd->reloc_off;
470 #ifdef CONFIG_LOGBUFFER
471 logbuff_init_ptrs ();
474 post_output_backlog ();
480 /* instruction cache enabled in cpu_init_f() for faster relocation */
481 icache_enable (); /* it's time to enable the instruction cache */
485 * Setup trap handlers
489 #if !defined(CFG_NO_FLASH)
492 if ((flash_size = flash_init ()) > 0) {
493 # ifdef CFG_FLASH_CHECKSUM
494 print_size (flash_size, "");
496 * Compute and print flash CRC if flashchecksum is set to 'y'
498 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
500 s = getenv ("flashchecksum");
501 if (s && (*s == 'y')) {
502 printf (" CRC: %08lX",
504 (const unsigned char *) CFG_FLASH_BASE,
509 # else /* !CFG_FLASH_CHECKSUM */
510 print_size (flash_size, "\n");
511 # endif /* CFG_FLASH_CHECKSUM */
517 bd->bi_flashstart = CFG_FLASH_BASE; /* update start of FLASH memory */
518 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
519 bd->bi_flashoffset = 0;
520 #else /* CFG_NO_FLASH */
521 bd->bi_flashsize = 0;
522 bd->bi_flashstart = 0;
523 bd->bi_flashoffset = 0;
524 #endif /* !CFG_NO_FLASH */
528 /* initialize higher level parts of CPU like time base and timers */
533 /* initialize malloc() area */
538 # if !defined(CFG_ENV_IS_IN_EEPROM)
544 /* relocate environment function pointers etc. */
548 * Fill in missing fields of bd_info.
549 * We do this here, where we have "normal" access to the
550 * environment; we used to do this still running from ROM,
551 * where had to use getenv_r(), which can be pretty slow when
552 * the environment is in EEPROM.
554 s = getenv ("ethaddr");
555 for (i = 0; i < 6; ++i) {
556 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
558 s = (*e) ? e + 1 : e;
562 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
567 /** leave this here (after malloc(), environment and PCI are working) **/
568 /* Initialize devices */
571 /* Initialize the jump table for applications */
574 /* Initialize the console (after the relocation and devices init) */
577 #if defined(CONFIG_MISC_INIT_R)
578 /* miscellaneous platform dependent initialisations */
582 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
588 debug ("U-Boot relocated to %08lx\n", dest_addr);
595 /* Must happen after interrupts are initialized since
596 * an irq handler gets installed
600 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
601 serial_buffered_init();
604 #ifdef CONFIG_STATUS_LED
605 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
612 /* Insert function pointers now that we have relocated the code */
614 /* Initialize from environment */
615 if ((s = getenv ("loadaddr")) != NULL) {
616 load_addr = simple_strtoul (s, NULL, 16);
618 #if (CONFIG_COMMANDS & CFG_CMD_NET)
619 if ((s = getenv ("bootfile")) != NULL) {
620 copy_filename (BootFile, s, sizeof (BootFile));
622 #endif /* CFG_CMD_NET */
626 #if (CONFIG_COMMANDS & CFG_CMD_DOC)
632 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
635 nand_init(); /* go init the NAND */
638 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET)
644 post_run (NULL, POST_RAM | post_bootmode_get(0));
647 #ifdef CONFIG_LAST_STAGE_INIT
650 * Some parts can be only initialized if all others (like
651 * Interrupts) are up and running (i.e. the PC-style ISA
657 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
662 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
664 * Export available size of memory for Linux,
665 * taking into account the protected RAM at top of memory
673 if ((s = getenv ("pram")) != NULL) {
674 pram = simple_strtoul (s, NULL, 10);
681 #ifdef CONFIG_LOGBUFFER
682 /* Also take the logbuffer into account (pram is in kB) */
683 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
685 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
686 setenv ("mem", memsz);
690 #ifdef CONFIG_MODEM_SUPPORT
692 extern int do_mdm_init;
693 do_mdm_init = gd->do_mdm_init;
697 #ifdef CONFIG_WATCHDOG
698 /* disable watchdog if environment is set */
699 if ((s = getenv ("watchdog")) != NULL) {
700 if (strncmp (s, "off", 3) == 0) {
704 #endif /* CONFIG_WATCHDOG*/
707 /* Initialization complete - start the monitor */
709 /* main_loop() can return to retry autoboot, if so just run it again. */
715 /* NOTREACHED - no way out of command loop except booting */
721 puts ("### ERROR ### Please RESET the board ###\n");