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
48 #ifdef CONFIG_DRIVER_SMC91111
49 #include "../drivers/smc91111.h"
51 #ifdef CONFIG_DRIVER_LAN91C96
52 #include "../drivers/lan91c96.h"
55 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
56 void nand_init (void);
59 ulong monitor_flash_len;
61 #ifdef CONFIG_HAS_DATAFLASH
62 extern int AT91F_DataflashInit(void);
63 extern void dataflash_print_info(void);
66 #ifndef CONFIG_IDENT_STRING
67 #define CONFIG_IDENT_STRING ""
70 const char version_string[] =
71 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
73 #ifdef CONFIG_DRIVER_CS8900
74 extern void cs8900_get_enetaddr (uchar * addr);
77 #ifdef CONFIG_DRIVER_RTL8019
78 extern void rtl8019_get_enetaddr (uchar * addr);
82 * Begin and End of memory area for malloc(), and current "brk"
84 static ulong mem_malloc_start = 0;
85 static ulong mem_malloc_end = 0;
86 static ulong mem_malloc_brk = 0;
89 void mem_malloc_init (ulong dest_addr)
91 mem_malloc_start = dest_addr;
92 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
93 mem_malloc_brk = mem_malloc_start;
95 memset ((void *) mem_malloc_start, 0,
96 mem_malloc_end - mem_malloc_start);
99 void *sbrk (ptrdiff_t increment)
101 ulong old = mem_malloc_brk;
102 ulong new = old + increment;
104 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
107 mem_malloc_brk = new;
109 return ((void *) old);
112 /************************************************************************
114 ************************************************************************
115 * Some of this code should be moved into the core functions,
116 * or dropped completely,
117 * but let's get it working (again) first...
120 static int init_baudrate (void)
122 DECLARE_GLOBAL_DATA_PTR;
124 uchar tmp[64]; /* long enough for environment variables */
125 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
126 gd->bd->bi_baudrate = gd->baudrate = (i > 0)
127 ? (int) simple_strtoul (tmp, NULL, 10)
133 static int display_banner (void)
135 printf ("\n\n%s\n\n", version_string);
136 debug ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
137 _armboot_start, _bss_start, _bss_end);
138 #ifdef CONFIG_MODEM_SUPPORT
139 debug ("Modem Support enabled\n");
141 #ifdef CONFIG_USE_IRQ
142 debug ("IRQ Stack: %08lx\n", IRQ_STACK_START);
143 debug ("FIQ Stack: %08lx\n", FIQ_STACK_START);
150 * WARNING: this code looks "cleaner" than the PowerPC version, but
151 * has the disadvantage that you either get nothing, or everything.
152 * On PowerPC, you might see "DRAM: " before the system hangs - which
153 * gives a simple yet clear indication which part of the
154 * initialization if failing.
156 static int display_dram_config (void)
158 DECLARE_GLOBAL_DATA_PTR;
162 puts ("RAM Configuration:\n");
164 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
165 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
166 print_size (gd->bd->bi_dram[i].size, "\n");
171 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
172 size += gd->bd->bi_dram[i].size;
175 print_size(size, "\n");
181 static void display_flash_config (ulong size)
184 print_size (size, "\n");
189 * Breathe some life into the board...
191 * Initialize a serial port as console, and carry out some hardware
194 * The first part of initialization is running from Flash memory;
195 * its main purpose is to initialize the RAM so that we
196 * can relocate the monitor code to RAM.
200 * All attempts to come up with a "common" initialization sequence
201 * that works for all boards and architectures failed: some of the
202 * requirements are just _too_ different. To get rid of the resulting
203 * mess of board dependent #ifdef'ed code we now make the whole
204 * initialization sequence configurable to the user.
206 * The requirements for any new initalization function is simple: it
207 * receives a pointer to the "global data" structure as it's only
208 * argument, and returns an integer return code, where 0 means
209 * "continue" and != 0 means "fatal error, hang the system".
211 typedef int (init_fnc_t) (void);
213 int print_cpuinfo (void); /* test-only */
215 init_fnc_t *init_sequence[] = {
216 cpu_init, /* basic cpu dependent setup */
217 board_init, /* basic board dependent setup */
218 interrupt_init, /* set up exceptions */
219 env_init, /* initialize environment */
220 init_baudrate, /* initialze baudrate settings */
221 serial_init, /* serial communications setup */
222 console_init_f, /* stage 1 init of console */
223 display_banner, /* say that we are here */
224 #if defined(CONFIG_DISPLAY_CPUINFO)
225 print_cpuinfo, /* display cpu info (and speed) */
227 #if defined(CONFIG_DISPLAY_BOARDINFO)
228 checkboard, /* display board info */
230 dram_init, /* configure available RAM banks */
235 void start_armboot (void)
237 DECLARE_GLOBAL_DATA_PTR;
240 init_fnc_t **init_fnc_ptr;
242 #if defined(CONFIG_VFD) || defined(CONFIG_LCD)
246 /* Pointer is writable since we allocated a register for it */
247 gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
248 /* compiler optimization barrier needed for GCC >= 3.4 */
249 __asm__ __volatile__("": : :"memory");
251 memset ((void*)gd, 0, sizeof (gd_t));
252 gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
253 memset (gd->bd, 0, sizeof (bd_t));
255 monitor_flash_len = _bss_start - _armboot_start;
257 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
258 if ((*init_fnc_ptr)() != 0) {
263 /* configure available FLASH banks */
264 size = flash_init ();
265 display_flash_config (size);
269 # define PAGE_SIZE 4096
272 * reserve memory for VFD display (always full pages)
274 /* bss_end is defined in the board-specific linker script */
275 addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
276 size = vfd_setmem (addr);
278 #endif /* CONFIG_VFD */
282 # define PAGE_SIZE 4096
285 * reserve memory for LCD display (always full pages)
287 /* bss_end is defined in the board-specific linker script */
288 addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
289 size = lcd_setmem (addr);
291 #endif /* CONFIG_LCD */
293 /* armboot_start is defined in the board-specific linker script */
294 mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
296 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
298 nand_init(); /* go init the NAND */
301 #ifdef CONFIG_HAS_DATAFLASH
302 AT91F_DataflashInit();
303 dataflash_print_info();
306 /* initialize environment */
310 /* must do this after the framebuffer is allocated */
312 #endif /* CONFIG_VFD */
315 gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
324 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
325 s = (i > 0) ? tmp : NULL;
327 for (reg = 0; reg < 6; ++reg) {
328 gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
330 s = (*e) ? e + 1 : e;
333 #ifdef CONFIG_HAS_ETH1
334 i = getenv_r ("eth1addr", tmp, sizeof (tmp));
335 s = (i > 0) ? tmp : NULL;
337 for (reg = 0; reg < 6; ++reg) {
338 gd->bd->bi_enet1addr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
340 s = (*e) ? e + 1 : e;
345 devices_init (); /* get the devices list going. */
347 #ifdef CONFIG_CMC_PU2
348 load_sernum_ethaddr ();
349 #endif /* CONFIG_CMC_PU2 */
353 console_init_r (); /* fully init console as a device */
355 #if defined(CONFIG_MISC_INIT_R)
356 /* miscellaneous platform dependent initialisations */
360 /* enable exceptions */
361 enable_interrupts ();
363 /* Perform network card initialisation if necessary */
364 #ifdef CONFIG_DRIVER_CS8900
365 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
368 #if defined(CONFIG_DRIVER_SMC91111) || defined (CONFIG_DRIVER_LAN91C96)
369 if (getenv ("ethaddr")) {
370 smc_set_mac_addr(gd->bd->bi_enetaddr);
372 #endif /* CONFIG_DRIVER_SMC91111 || CONFIG_DRIVER_LAN91C96 */
374 /* Initialize from environment */
375 if ((s = getenv ("loadaddr")) != NULL) {
376 load_addr = simple_strtoul (s, NULL, 16);
378 #if (CONFIG_COMMANDS & CFG_CMD_NET)
379 if ((s = getenv ("bootfile")) != NULL) {
380 copy_filename (BootFile, s, sizeof (BootFile));
382 #endif /* CFG_CMD_NET */
384 #ifdef BOARD_LATE_INIT
387 #if (CONFIG_COMMANDS & CFG_CMD_NET)
388 #if defined(CONFIG_NET_MULTI)
391 eth_initialize(gd->bd);
393 /* main_loop() can return to retry autoboot, if so just run it again. */
398 /* NOTREACHED - no way out of command loop except booting */
403 puts ("### ERROR ### Please RESET the board ###\n");
407 #ifdef CONFIG_MODEM_SUPPORT
408 /* called from main loop (common/main.c) */
409 extern void dbg(const char *fmt, ...);
415 extern char console_buffer[];
416 static inline void mdm_readline(char *buf, int bufsiz);
417 extern void enable_putc(void);
418 extern int hwflow_onoff(int);
420 enable_putc(); /* enable serial_putc() */
423 init_str = getenv("mdm_flow_control");
424 if (init_str && (strcmp(init_str, "rts/cts") == 0))
431 sprintf(env_str, "mdm_init%d", i);
432 if ((init_str = getenv(env_str)) != NULL) {
433 serial_puts(init_str);
436 mdm_readline(console_buffer, CFG_CBSIZE);
437 dbg("ini%d: [%s]", i, console_buffer);
439 if ((strcmp(console_buffer, "OK") == 0) ||
440 (strcmp(console_buffer, "ERROR") == 0)) {
441 dbg("ini%d: cmd done", i);
443 } else /* in case we are originating call ... */
444 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
445 dbg("ini%d: connect", i);
450 break; /* no init string - stop modem init */
457 /* final stage - wait for connect */
458 for(;i > 1;) { /* if 'i' > 1 - wait for connection
459 message from modem */
460 mdm_readline(console_buffer, CFG_CBSIZE);
461 dbg("ini_f: [%s]", console_buffer);
462 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
463 dbg("ini_f: connected");
471 /* 'inline' - We have to do it fast */
472 static inline void mdm_readline(char *buf, int bufsiz)
483 /* dbg("(%c)", c); */
495 return; /* sanity check */
503 #endif /* CONFIG_MODEM_SUPPORT */