2 * (C) Copyright 2002-2006
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 * To match the U-Boot user interface on ARM platforms to the U-Boot
30 * standard (as on PPC platforms), some messages with debug character
31 * are removed from the default U-Boot build.
33 * Define DEBUG here if you want additional info as shown below
34 * printed upon startup:
36 * U-Boot code: 00F00000 -> 00F3C774 BSS: -> 00FC3274
50 #ifdef CONFIG_DRIVER_SMC91111
51 #include "../drivers/smc91111.h"
53 #ifdef CONFIG_DRIVER_LAN91C96
54 #include "../drivers/lan91c96.h"
57 DECLARE_GLOBAL_DATA_PTR;
59 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
60 void nand_init (void);
63 ulong monitor_flash_len;
65 #ifdef CONFIG_HAS_DATAFLASH
66 extern int AT91F_DataflashInit(void);
67 extern void dataflash_print_info(void);
70 #ifndef CONFIG_IDENT_STRING
71 #define CONFIG_IDENT_STRING ""
74 const char version_string[] =
75 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
77 #ifdef CONFIG_DRIVER_CS8900
78 extern void cs8900_get_enetaddr (uchar * addr);
81 #ifdef CONFIG_DRIVER_RTL8019
82 extern void rtl8019_get_enetaddr (uchar * addr);
86 * Begin and End of memory area for malloc(), and current "brk"
88 static ulong mem_malloc_start = 0;
89 static ulong mem_malloc_end = 0;
90 static ulong mem_malloc_brk = 0;
93 void mem_malloc_init (ulong dest_addr)
95 mem_malloc_start = dest_addr;
96 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
97 mem_malloc_brk = mem_malloc_start;
99 memset ((void *) mem_malloc_start, 0,
100 mem_malloc_end - mem_malloc_start);
103 void *sbrk (ptrdiff_t increment)
105 ulong old = mem_malloc_brk;
106 ulong new = old + increment;
108 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
111 mem_malloc_brk = new;
113 return ((void *) old);
116 /************************************************************************
118 ************************************************************************
119 * Some of this code should be moved into the core functions,
120 * or dropped completely,
121 * but let's get it working (again) first...
124 static int init_baudrate (void)
126 uchar tmp[64]; /* long enough for environment variables */
127 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
128 gd->bd->bi_baudrate = gd->baudrate = (i > 0)
129 ? (int) simple_strtoul (tmp, NULL, 10)
135 static int display_banner (void)
137 printf ("\n\n%s\n\n", version_string);
138 debug ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
139 _armboot_start, _bss_start, _bss_end);
140 #ifdef CONFIG_MODEM_SUPPORT
141 debug ("Modem Support enabled\n");
143 #ifdef CONFIG_USE_IRQ
144 debug ("IRQ Stack: %08lx\n", IRQ_STACK_START);
145 debug ("FIQ Stack: %08lx\n", FIQ_STACK_START);
152 * WARNING: this code looks "cleaner" than the PowerPC version, but
153 * has the disadvantage that you either get nothing, or everything.
154 * On PowerPC, you might see "DRAM: " before the system hangs - which
155 * gives a simple yet clear indication which part of the
156 * initialization if failing.
158 static int display_dram_config (void)
163 puts ("RAM Configuration:\n");
165 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
166 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
167 print_size (gd->bd->bi_dram[i].size, "\n");
172 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
173 size += gd->bd->bi_dram[i].size;
176 print_size(size, "\n");
182 static void display_flash_config (ulong size)
185 print_size (size, "\n");
190 * Breathe some life into the board...
192 * Initialize a serial port as console, and carry out some hardware
195 * The first part of initialization is running from Flash memory;
196 * its main purpose is to initialize the RAM so that we
197 * can relocate the monitor code to RAM.
201 * All attempts to come up with a "common" initialization sequence
202 * that works for all boards and architectures failed: some of the
203 * requirements are just _too_ different. To get rid of the resulting
204 * mess of board dependent #ifdef'ed code we now make the whole
205 * initialization sequence configurable to the user.
207 * The requirements for any new initalization function is simple: it
208 * receives a pointer to the "global data" structure as it's only
209 * argument, and returns an integer return code, where 0 means
210 * "continue" and != 0 means "fatal error, hang the system".
212 typedef int (init_fnc_t) (void);
214 int print_cpuinfo (void); /* test-only */
216 init_fnc_t *init_sequence[] = {
217 cpu_init, /* basic cpu dependent setup */
218 board_init, /* basic board dependent setup */
219 interrupt_init, /* set up exceptions */
220 env_init, /* initialize environment */
221 init_baudrate, /* initialze baudrate settings */
222 serial_init, /* serial communications setup */
223 console_init_f, /* stage 1 init of console */
224 display_banner, /* say that we are here */
225 #if defined(CONFIG_DISPLAY_CPUINFO)
226 print_cpuinfo, /* display cpu info (and speed) */
228 #if defined(CONFIG_DISPLAY_BOARDINFO)
229 checkboard, /* display board info */
231 dram_init, /* configure available RAM banks */
236 void start_armboot (void)
239 init_fnc_t **init_fnc_ptr;
241 #if defined(CONFIG_VFD) || defined(CONFIG_LCD)
245 /* Pointer is writable since we allocated a register for it */
246 gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
247 /* compiler optimization barrier needed for GCC >= 3.4 */
248 __asm__ __volatile__("": : :"memory");
250 memset ((void*)gd, 0, sizeof (gd_t));
251 gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
252 memset (gd->bd, 0, sizeof (bd_t));
254 monitor_flash_len = _bss_start - _armboot_start;
256 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
257 if ((*init_fnc_ptr)() != 0) {
262 /* configure available FLASH banks */
263 size = flash_init ();
264 display_flash_config (size);
268 # define PAGE_SIZE 4096
271 * reserve memory for VFD display (always full pages)
273 /* bss_end is defined in the board-specific linker script */
274 addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
275 size = vfd_setmem (addr);
277 #endif /* CONFIG_VFD */
281 # define PAGE_SIZE 4096
284 * reserve memory for LCD display (always full pages)
286 /* bss_end is defined in the board-specific linker script */
287 addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
288 size = lcd_setmem (addr);
290 #endif /* CONFIG_LCD */
292 /* armboot_start is defined in the board-specific linker script */
293 mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
295 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
297 nand_init(); /* go init the NAND */
300 #ifdef CONFIG_HAS_DATAFLASH
301 AT91F_DataflashInit();
302 dataflash_print_info();
305 /* initialize environment */
309 /* must do this after the framebuffer is allocated */
311 #endif /* CONFIG_VFD */
314 gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
323 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
324 s = (i > 0) ? tmp : NULL;
326 for (reg = 0; reg < 6; ++reg) {
327 gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
329 s = (*e) ? e + 1 : e;
332 #ifdef CONFIG_HAS_ETH1
333 i = getenv_r ("eth1addr", tmp, sizeof (tmp));
334 s = (i > 0) ? tmp : NULL;
336 for (reg = 0; reg < 6; ++reg) {
337 gd->bd->bi_enet1addr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
339 s = (*e) ? e + 1 : e;
344 devices_init (); /* get the devices list going. */
346 #ifdef CONFIG_CMC_PU2
347 load_sernum_ethaddr ();
348 #endif /* CONFIG_CMC_PU2 */
352 console_init_r (); /* fully init console as a device */
354 #if defined(CONFIG_MISC_INIT_R)
355 /* miscellaneous platform dependent initialisations */
359 /* enable exceptions */
360 enable_interrupts ();
362 /* Perform network card initialisation if necessary */
363 #ifdef CONFIG_DRIVER_CS8900
364 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
367 #if defined(CONFIG_DRIVER_SMC91111) || defined (CONFIG_DRIVER_LAN91C96)
368 if (getenv ("ethaddr")) {
369 smc_set_mac_addr(gd->bd->bi_enetaddr);
371 #endif /* CONFIG_DRIVER_SMC91111 || CONFIG_DRIVER_LAN91C96 */
373 /* Initialize from environment */
374 if ((s = getenv ("loadaddr")) != NULL) {
375 load_addr = simple_strtoul (s, NULL, 16);
377 #if (CONFIG_COMMANDS & CFG_CMD_NET)
378 if ((s = getenv ("bootfile")) != NULL) {
379 copy_filename (BootFile, s, sizeof (BootFile));
381 #endif /* CFG_CMD_NET */
383 #ifdef BOARD_LATE_INIT
386 #if (CONFIG_COMMANDS & CFG_CMD_NET)
387 #if defined(CONFIG_NET_MULTI)
390 eth_initialize(gd->bd);
392 /* main_loop() can return to retry autoboot, if so just run it again. */
397 /* NOTREACHED - no way out of command loop except booting */
402 puts ("### ERROR ### Please RESET the board ###\n");
406 #ifdef CONFIG_MODEM_SUPPORT
407 /* called from main loop (common/main.c) */
408 extern void dbg(const char *fmt, ...);
414 extern char console_buffer[];
415 static inline void mdm_readline(char *buf, int bufsiz);
416 extern void enable_putc(void);
417 extern int hwflow_onoff(int);
419 enable_putc(); /* enable serial_putc() */
422 init_str = getenv("mdm_flow_control");
423 if (init_str && (strcmp(init_str, "rts/cts") == 0))
430 sprintf(env_str, "mdm_init%d", i);
431 if ((init_str = getenv(env_str)) != NULL) {
432 serial_puts(init_str);
435 mdm_readline(console_buffer, CFG_CBSIZE);
436 dbg("ini%d: [%s]", i, console_buffer);
438 if ((strcmp(console_buffer, "OK") == 0) ||
439 (strcmp(console_buffer, "ERROR") == 0)) {
440 dbg("ini%d: cmd done", i);
442 } else /* in case we are originating call ... */
443 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
444 dbg("ini%d: connect", i);
449 break; /* no init string - stop modem init */
456 /* final stage - wait for connect */
457 for(;i > 1;) { /* if 'i' > 1 - wait for connection
458 message from modem */
459 mdm_readline(console_buffer, CFG_CBSIZE);
460 dbg("ini_f: [%s]", console_buffer);
461 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
462 dbg("ini_f: connected");
470 /* 'inline' - We have to do it fast */
471 static inline void mdm_readline(char *buf, int bufsiz)
482 /* dbg("(%c)", c); */
494 return; /* sanity check */
502 #endif /* CONFIG_MODEM_SUPPORT */