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,
35 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
36 void nand_init (void);
39 ulong monitor_flash_len;
41 #ifdef CONFIG_HAS_DATAFLASH
42 extern int AT91F_DataflashInit(void);
43 extern void dataflash_print_info(void);
46 #ifndef CONFIG_IDENT_STRING
47 #define CONFIG_IDENT_STRING ""
50 const char version_string[] =
51 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
53 #ifdef CONFIG_DRIVER_CS8900
54 extern void cs8900_get_enetaddr (uchar * addr);
57 #ifdef CONFIG_DRIVER_RTL8019
58 extern void rtl8019_get_enetaddr (uchar * addr);
61 #ifdef CONFIG_DRIVER_LAN91C96
62 #include "../drivers/lan91c96.h"
65 * Begin and End of memory area for malloc(), and current "brk"
67 static ulong mem_malloc_start = 0;
68 static ulong mem_malloc_end = 0;
69 static ulong mem_malloc_brk = 0;
72 void mem_malloc_init (ulong dest_addr)
74 mem_malloc_start = dest_addr;
75 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
76 mem_malloc_brk = mem_malloc_start;
78 memset ((void *) mem_malloc_start, 0,
79 mem_malloc_end - mem_malloc_start);
82 void *sbrk (ptrdiff_t increment)
84 ulong old = mem_malloc_brk;
85 ulong new = old + increment;
87 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
92 return ((void *) old);
95 /************************************************************************
97 ************************************************************************
98 * Some of this code should be moved into the core functions,
99 * or dropped completely,
100 * but let's get it working (again) first...
103 static int init_baudrate (void)
105 DECLARE_GLOBAL_DATA_PTR;
107 uchar tmp[64]; /* long enough for environment variables */
108 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
109 gd->bd->bi_baudrate = gd->baudrate = (i > 0)
110 ? (int) simple_strtoul (tmp, NULL, 10)
116 static int display_banner (void)
118 printf ("\n\n%s\n\n", version_string);
119 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
120 _armboot_start, _bss_start, _bss_end);
121 #ifdef CONFIG_MODEM_SUPPORT
122 puts ("Modem Support enabled\n");
124 #ifdef CONFIG_USE_IRQ
125 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
126 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
133 * WARNING: this code looks "cleaner" than the PowerPC version, but
134 * has the disadvantage that you either get nothing, or everything.
135 * On PowerPC, you might see "DRAM: " before the system hangs - which
136 * gives a simple yet clear indication which part of the
137 * initialization if failing.
139 static int display_dram_config (void)
141 DECLARE_GLOBAL_DATA_PTR;
144 puts ("RAM Configuration:\n");
146 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
147 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
148 print_size (gd->bd->bi_dram[i].size, "\n");
154 static void display_flash_config (ulong size)
157 print_size (size, "\n");
162 * Breathe some life into the board...
164 * Initialize a serial port as console, and carry out some hardware
167 * The first part of initialization is running from Flash memory;
168 * its main purpose is to initialize the RAM so that we
169 * can relocate the monitor code to RAM.
173 * All attempts to come up with a "common" initialization sequence
174 * that works for all boards and architectures failed: some of the
175 * requirements are just _too_ different. To get rid of the resulting
176 * mess of board dependent #ifdef'ed code we now make the whole
177 * initialization sequence configurable to the user.
179 * The requirements for any new initalization function is simple: it
180 * receives a pointer to the "global data" structure as it's only
181 * argument, and returns an integer return code, where 0 means
182 * "continue" and != 0 means "fatal error, hang the system".
184 typedef int (init_fnc_t) (void);
186 init_fnc_t *init_sequence[] = {
187 cpu_init, /* basic cpu dependent setup */
188 board_init, /* basic board dependent setup */
189 interrupt_init, /* set up exceptions */
190 env_init, /* initialize environment */
191 init_baudrate, /* initialze baudrate settings */
192 serial_init, /* serial communications setup */
193 console_init_f, /* stage 1 init of console */
194 display_banner, /* say that we are here */
195 dram_init, /* configure available RAM banks */
197 #if defined(CONFIG_VCMA9)
203 void start_armboot (void)
205 DECLARE_GLOBAL_DATA_PTR;
208 init_fnc_t **init_fnc_ptr;
210 #if defined(CONFIG_VFD)
214 /* Pointer is writable since we allocated a register for it */
215 gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
216 memset ((void*)gd, 0, sizeof (gd_t));
217 gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
218 memset (gd->bd, 0, sizeof (bd_t));
220 monitor_flash_len = _bss_start - _armboot_start;
222 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
223 if ((*init_fnc_ptr)() != 0) {
228 /* configure available FLASH banks */
229 size = flash_init ();
230 display_flash_config (size);
234 # define PAGE_SIZE 4096
237 * reserve memory for VFD display (always full pages)
239 /* armboot_end is defined in the board-specific linker script */
240 addr = (_bss_start + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
241 size = vfd_setmem (addr);
243 #endif /* CONFIG_VFD */
245 /* armboot_start is defined in the board-specific linker script */
246 mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
248 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
250 nand_init(); /* go init the NAND */
253 #ifdef CONFIG_HAS_DATAFLASH
254 AT91F_DataflashInit();
255 dataflash_print_info();
258 /* initialize environment */
262 /* must do this after the framebuffer is allocated */
264 #endif /* CONFIG_VFD */
267 gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
276 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
277 s = (i > 0) ? tmp : NULL;
279 for (reg = 0; reg < 6; ++reg) {
280 gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
282 s = (*e) ? e + 1 : e;
286 devices_init (); /* get the devices list going. */
290 console_init_r (); /* fully init console as a device */
292 #if defined(CONFIG_MISC_INIT_R)
293 /* miscellaneous platform dependent initialisations */
297 /* enable exceptions */
298 enable_interrupts ();
300 /* Perform network card initialisation if necessary */
301 #ifdef CONFIG_DRIVER_CS8900
302 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
305 #ifdef CONFIG_DRIVER_LAN91C96
306 if (getenv ("ethaddr")) {
307 smc_set_mac_addr(gd->bd->bi_enetaddr);
309 #endif /* CONFIG_DRIVER_LAN91C96 */
311 /* Initialize from environment */
312 if ((s = getenv ("loadaddr")) != NULL) {
313 load_addr = simple_strtoul (s, NULL, 16);
315 #if (CONFIG_COMMANDS & CFG_CMD_NET)
316 if ((s = getenv ("bootfile")) != NULL) {
317 copy_filename (BootFile, s, sizeof (BootFile));
319 #endif /* CFG_CMD_NET */
321 #ifdef BOARD_LATE_INIT
325 /* main_loop() can return to retry autoboot, if so just run it again. */
330 /* NOTREACHED - no way out of command loop except booting */
335 puts ("### ERROR ### Please RESET the board ###\n");
339 #ifdef CONFIG_MODEM_SUPPORT
340 /* called from main loop (common/main.c) */
341 extern void dbg(const char *fmt, ...);
347 extern char console_buffer[];
348 static inline void mdm_readline(char *buf, int bufsiz);
349 extern void enable_putc(void);
350 extern int hwflow_onoff(int);
352 enable_putc(); /* enable serial_putc() */
355 init_str = getenv("mdm_flow_control");
356 if (init_str && (strcmp(init_str, "rts/cts") == 0))
363 sprintf(env_str, "mdm_init%d", i);
364 if ((init_str = getenv(env_str)) != NULL) {
365 serial_puts(init_str);
368 mdm_readline(console_buffer, CFG_CBSIZE);
369 dbg("ini%d: [%s]", i, console_buffer);
371 if ((strcmp(console_buffer, "OK") == 0) ||
372 (strcmp(console_buffer, "ERROR") == 0)) {
373 dbg("ini%d: cmd done", i);
375 } else /* in case we are originating call ... */
376 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
377 dbg("ini%d: connect", i);
382 break; /* no init string - stop modem init */
389 /* final stage - wait for connect */
390 for(;i > 1;) { /* if 'i' > 1 - wait for connection
391 message from modem */
392 mdm_readline(console_buffer, CFG_CBSIZE);
393 dbg("ini_f: [%s]", console_buffer);
394 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
395 dbg("ini_f: connected");
403 /* 'inline' - We have to do it fast */
404 static inline void mdm_readline(char *buf, int bufsiz)
415 /* dbg("(%c)", c); */
427 return; /* sanity check */
435 #endif /* CONFIG_MODEM_SUPPORT */