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 static char *failed = "*** failed ***\n";
66 extern flash_info_t flash_info[];
69 #include <environment.h>
71 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
72 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
73 defined(CFG_ENV_IS_IN_NVRAM)
74 #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
76 #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
79 extern ulong __init_end;
82 extern void timer_init(void);
84 #if defined(CONFIG_WATCHDOG)
85 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
86 # define WATCHDOG_DISABLE watchdog_disable
88 extern int watchdog_init(void);
89 extern int watchdog_disable(void);
91 # define INIT_FUNC_WATCHDOG_INIT /* undef */
92 # define WATCHDOG_DISABLE /* undef */
93 #endif /* CONFIG_WATCHDOG */
95 ulong monitor_flash_len;
98 * Begin and End of memory area for malloc(), and current "brk"
100 static ulong mem_malloc_start = 0;
101 static ulong mem_malloc_end = 0;
102 static ulong mem_malloc_brk = 0;
104 /************************************************************************
106 ************************************************************************
110 * The Malloc area is immediately below the monitor copy in DRAM
112 static void mem_malloc_init (void)
114 DECLARE_GLOBAL_DATA_PTR;
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 DECLARE_GLOBAL_DATA_PTR;
182 uchar tmp[64]; /* long enough for environment variables */
183 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
185 gd->baudrate = (i > 0)
186 ? (int) simple_strtoul (tmp, NULL, 10)
191 /***********************************************************************/
193 static int init_func_ram (void)
195 DECLARE_GLOBAL_DATA_PTR;
197 int board_type = 0; /* use dummy arg */
200 if ((gd->ram_size = initdram (board_type)) > 0) {
201 print_size (gd->ram_size, "\n");
208 /***********************************************************************/
210 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
211 static int init_func_i2c (void)
214 i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
220 /***********************************************************************/
222 /************************************************************************
223 * Initialization sequence *
224 ************************************************************************
227 init_fnc_t *init_sequence[] = {
235 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
239 #if defined(CFG_DRAM_TEST)
241 #endif /* CFG_DRAM_TEST */
242 INIT_FUNC_WATCHDOG_INIT
243 NULL, /* Terminate this list */
247 /************************************************************************
249 * This is the first part of the initialization sequence that is
250 * implemented in C, but still running from ROM.
252 * The main purpose is to provide a (serial) console interface as
253 * soon as possible (so we can see any error messages), and to
254 * initialize the RAM so that we can relocate the monitor code to
257 * Be aware of the restrictions: global data is read-only, BSS is not
258 * initialized, and stack space is limited to a few kB.
260 ************************************************************************
264 board_init_f (ulong bootflag)
266 DECLARE_GLOBAL_DATA_PTR;
269 ulong len, addr, addr_sp;
271 init_fnc_t **init_fnc_ptr;
275 uchar tmp[64]; /* long enough for environment variables */
278 /* Pointer is writable since we allocated a register for it */
279 gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
280 /* compiler optimization barrier needed for GCC >= 3.4 */
281 __asm__ __volatile__("": : :"memory");
283 /* Clear initial global data */
284 memset ((void *) gd, 0, sizeof (gd_t));
286 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
287 if ((*init_fnc_ptr)() != 0) {
293 * Now that we have DRAM mapped and working, we can
294 * relocate the code and continue running from DRAM.
296 * Reserve memory at end of RAM for (top down in that order):
300 * - board info struct
302 len = (ulong)&_end - CFG_MONITOR_BASE;
304 addr = CFG_SDRAM_BASE + gd->ram_size;
306 #ifdef CONFIG_LOGBUFFER
307 /* reserve kernel log buffer */
308 addr -= (LOGBUFF_RESERVE);
309 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
314 * reserve protected RAM
316 i = getenv_r ("pram", tmp, sizeof (tmp));
317 reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
318 addr -= (reg << 10); /* size is in kB */
319 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
320 #endif /* CONFIG_PRAM */
323 * reserve memory for U-Boot code, data & bss
324 * round down to next 4 kB limit
329 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
332 * reserve memory for malloc() arena
334 addr_sp = addr - TOTAL_MALLOC_LEN;
335 debug ("Reserving %dk for malloc() at: %08lx\n",
336 TOTAL_MALLOC_LEN >> 10, addr_sp);
339 * (permanently) allocate a Board Info struct
340 * and a permanent copy of the "global" data
342 addr_sp -= sizeof (bd_t);
343 bd = (bd_t *) addr_sp;
345 debug ("Reserving %d Bytes for Board Info at: %08lx\n",
346 sizeof (bd_t), addr_sp);
347 addr_sp -= sizeof (gd_t);
348 id = (gd_t *) addr_sp;
349 debug ("Reserving %d Bytes for Global Data at: %08lx\n",
350 sizeof (gd_t), addr_sp);
352 /* Reserve memory for boot params. */
353 addr_sp -= CFG_BOOTPARAMS_LEN;
354 bd->bi_boot_params = addr_sp;
355 debug ("Reserving %dk for boot parameters at: %08lx\n",
356 CFG_BOOTPARAMS_LEN >> 10, addr_sp);
359 * Finally, we set up a new (bigger) stack.
361 * Leave some safety gap for SP, force alignment on 16 byte boundary
362 * Clear initial stack frame
366 *((ulong *) addr_sp)-- = 0;
367 *((ulong *) addr_sp)-- = 0;
368 debug ("Stack Pointer at: %08lx\n", addr_sp);
371 * Save local variables to board info struct
373 bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
374 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
375 bd->bi_mbar_base = CFG_MBAR; /* base of internal registers */
377 bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
380 bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
381 bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
382 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
385 strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
386 strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
392 post_bootmode_init();
393 post_run (NULL, POST_ROM | post_bootmode_get(0));
398 memcpy (id, (void *)gd, sizeof (gd_t));
400 debug ("Start relocate of code from %08x to %08lx\n", CFG_MONITOR_BASE, addr);
401 relocate_code (addr_sp, id, addr);
403 /* NOTREACHED - jump_to_ram() does not return */
406 /************************************************************************
408 * This is the next part if the initialization sequence: we are now
409 * running from RAM and have a "normal" C environment, i. e. global
410 * data can be written, BSS has been cleared, the stack size in not
411 * that critical any more, etc.
413 ************************************************************************
415 void board_init_r (gd_t *id, ulong dest_addr)
417 DECLARE_GLOBAL_DATA_PTR;
422 extern void malloc_bin_reloc (void);
424 #ifndef CFG_ENV_IS_NOWHERE
425 extern char * env_name_spec;
430 gd = id; /* initialize RAM version of global data */
433 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
435 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
439 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
441 monitor_flash_len = (ulong)&__init_end - dest_addr;
444 * We have to relocate the command table manually
446 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
448 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
450 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
451 cmdtp->name, (ulong) (cmdtp->cmd), addr);
454 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
456 addr = (ulong)(cmdtp->name) + gd->reloc_off;
457 cmdtp->name = (char *)addr;
460 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
461 cmdtp->usage = (char *)addr;
465 addr = (ulong)(cmdtp->help) + gd->reloc_off;
466 cmdtp->help = (char *)addr;
470 /* there are some other pointer constants we must deal with */
471 #ifndef CFG_ENV_IS_NOWHERE
472 env_name_spec += gd->reloc_off;
477 #ifdef CONFIG_LOGBUFFER
478 logbuff_init_ptrs ();
481 post_output_backlog ();
487 /* instruction cache enabled in cpu_init_f() for faster relocation */
488 icache_enable (); /* it's time to enable the instruction cache */
492 * Setup trap handlers
496 #if !defined(CFG_NO_FLASH)
499 if ((flash_size = flash_init ()) > 0) {
500 # ifdef CFG_FLASH_CHECKSUM
501 print_size (flash_size, "");
503 * Compute and print flash CRC if flashchecksum is set to 'y'
505 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
507 s = getenv ("flashchecksum");
508 if (s && (*s == 'y')) {
509 printf (" CRC: %08lX",
511 (const unsigned char *) CFG_FLASH_BASE,
516 # else /* !CFG_FLASH_CHECKSUM */
517 print_size (flash_size, "\n");
518 # endif /* CFG_FLASH_CHECKSUM */
524 bd->bi_flashstart = CFG_FLASH_BASE; /* update start of FLASH memory */
525 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
526 bd->bi_flashoffset = 0;
527 #else /* CFG_NO_FLASH */
528 bd->bi_flashsize = 0;
529 bd->bi_flashstart = 0;
530 bd->bi_flashoffset = 0;
531 #endif /* !CFG_NO_FLASH */
535 /* initialize higher level parts of CPU like time base and timers */
540 /* initialize malloc() area */
545 # if !defined(CFG_ENV_IS_IN_EEPROM)
551 /* relocate environment function pointers etc. */
555 * Fill in missing fields of bd_info.
556 * We do this here, where we have "normal" access to the
557 * environment; we used to do this still running from ROM,
558 * where had to use getenv_r(), which can be pretty slow when
559 * the environment is in EEPROM.
561 s = getenv ("ethaddr");
562 for (i = 0; i < 6; ++i) {
563 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
565 s = (*e) ? e + 1 : e;
569 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
574 /** leave this here (after malloc(), environment and PCI are working) **/
575 /* Initialize devices */
578 /* Initialize the jump table for applications */
581 /* Initialize the console (after the relocation and devices init) */
584 #if defined(CONFIG_MISC_INIT_R)
585 /* miscellaneous platform dependent initialisations */
589 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
595 debug ("U-Boot relocated to %08lx\n", dest_addr);
602 /* Must happen after interrupts are initialized since
603 * an irq handler gets installed
607 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
608 serial_buffered_init();
611 #ifdef CONFIG_STATUS_LED
612 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
619 /* Insert function pointers now that we have relocated the code */
621 /* Initialize from environment */
622 if ((s = getenv ("loadaddr")) != NULL) {
623 load_addr = simple_strtoul (s, NULL, 16);
625 #if (CONFIG_COMMANDS & CFG_CMD_NET)
626 if ((s = getenv ("bootfile")) != NULL) {
627 copy_filename (BootFile, s, sizeof (BootFile));
629 #endif /* CFG_CMD_NET */
633 #if (CONFIG_COMMANDS & CFG_CMD_DOC)
639 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
642 nand_init(); /* go init the NAND */
645 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET)
651 post_run (NULL, POST_RAM | post_bootmode_get(0));
654 #ifdef CONFIG_LAST_STAGE_INIT
657 * Some parts can be only initialized if all others (like
658 * Interrupts) are up and running (i.e. the PC-style ISA
664 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
669 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
671 * Export available size of memory for Linux,
672 * taking into account the protected RAM at top of memory
680 if ((s = getenv ("pram")) != NULL) {
681 pram = simple_strtoul (s, NULL, 10);
688 #ifdef CONFIG_LOGBUFFER
689 /* Also take the logbuffer into account (pram is in kB) */
690 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
692 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
693 setenv ("mem", memsz);
697 #ifdef CONFIG_MODEM_SUPPORT
699 extern int do_mdm_init;
700 do_mdm_init = gd->do_mdm_init;
704 #ifdef CONFIG_WATCHDOG
705 /* disable watchdog if environment is set */
706 if ((s = getenv ("watchdog")) != NULL) {
707 if (strncmp (s, "off", 3) == 0) {
711 #endif /* CONFIG_WATCHDOG*/
714 /* Initialization complete - start the monitor */
716 /* main_loop() can return to retry autoboot, if so just run it again. */
722 /* NOTREACHED - no way out of command loop except booting */
728 puts ("### ERROR ### Please RESET the board ###\n");