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 const char version_string[] =
36 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
38 #ifdef CONFIG_DRIVER_CS8900
39 extern void cs8900_get_enetaddr (uchar * addr);
43 * Begin and End of memory area for malloc(), and current "brk"
45 static ulong mem_malloc_start = 0;
46 static ulong mem_malloc_end = 0;
47 static ulong mem_malloc_brk = 0;
50 void mem_malloc_init (ulong dest_addr)
52 mem_malloc_start = dest_addr;
53 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
54 mem_malloc_brk = mem_malloc_start;
56 memset ((void *) mem_malloc_start, 0,
57 mem_malloc_end - mem_malloc_start);
60 void *sbrk (ptrdiff_t increment)
62 ulong old = mem_malloc_brk;
63 ulong new = old + increment;
65 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
70 return ((void *) old);
73 /************************************************************************
75 ************************************************************************
76 * Some of this code should be moved into the core functions,
77 * or dropped completely,
78 * but let's get it working (again) first...
81 static int init_baudrate (void)
83 DECLARE_GLOBAL_DATA_PTR;
85 uchar tmp[64]; /* long enough for environment variables */
86 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
88 gd->baudrate = (i > 0)
89 ? (int) simple_strtoul (tmp, NULL, 10)
95 static int display_banner (void)
98 printf ("\n\n%s\n\n", version_string);
99 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
100 _armboot_start, _armboot_end_data, _armboot_end);
101 #ifdef CONFIG_MODEM_SUPPORT
102 puts ("Modem Support enabled\n");
104 #ifdef CONFIG_USE_IRQ
105 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
106 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
112 * WARNING: this code looks "cleaner" than the PowerPC version, but
113 * has the disadvantage that you either get nothing, or everything.
114 * On PowerPC, you might see "DRAM: " before the system hangs - which
115 * gives a simple yet clear indication which part of the
116 * initialization if failing.
118 static int display_dram_config (void)
120 DECLARE_GLOBAL_DATA_PTR;
123 puts ("DRAM Configuration:\n");
125 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
126 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
127 print_size (gd->bd->bi_dram[i].size, "\n");
133 static void display_flash_config (ulong size)
136 print_size (size, "\n");
142 * Breath some life into the board...
144 * Initialize an SMC for serial comms, and carry out some hardware
147 * The first part of initialization is running from Flash memory;
148 * its main purpose is to initialize the RAM so that we
149 * can relocate the monitor code to RAM.
153 * All attempts to come up with a "common" initialization sequence
154 * that works for all boards and architectures failed: some of the
155 * requirements are just _too_ different. To get rid of the resulting
156 * mess of board dependend #ifdef'ed code we now make the whole
157 * initialization sequence configurable to the user.
159 * The requirements for any new initalization function is simple: it
160 * receives a pointer to the "global data" structure as it's only
161 * argument, and returns an integer return code, where 0 means
162 * "continue" and != 0 means "fatal error, hang the system".
164 typedef int (init_fnc_t) (void);
166 init_fnc_t *init_sequence[] = {
167 cpu_init, /* basic cpu dependent setup */
168 board_init, /* basic board dependent setup */
169 interrupt_init, /* set up exceptions */
170 env_init, /* initialize environment */
171 init_baudrate, /* initialze baudrate settings */
172 serial_init, /* serial communications setup */
173 display_banner, /* say that we are here */
174 dram_init, /* configure available RAM banks */
176 #if defined(CONFIG_VCMA9)
182 void start_armboot (void)
184 DECLARE_GLOBAL_DATA_PTR;
189 init_fnc_t **init_fnc_ptr;
190 #if defined(CONFIG_VFD)
194 /* Pointer is writable since we allocated a register for it */
196 memset (gd, 0, sizeof (gd_t));
198 memset (gd->bd, 0, sizeof (bd_t));
200 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
201 if ((*init_fnc_ptr)() != 0) {
206 /* configure available FLASH banks */
207 size = flash_init ();
208 display_flash_config (size);
212 # define PAGE_SIZE 4096
215 * reserve memory for VFD display (always full pages)
217 /* armboot_real_end is defined in the board-specific linker script */
218 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
219 size = vfd_setmem (addr);
221 /* round to the next page boundary */
223 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
224 mem_malloc_init (addr);
226 /* armboot_real_end is defined in the board-specific linker script */
227 mem_malloc_init (_armboot_real_end);
228 #endif /* CONFIG_VFD */
230 /* initialize environment */
234 /* must do this after the framebuffer is allocated */
239 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
248 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
249 s = (i > 0) ? tmp : NULL;
251 for (reg = 0; reg < 6; ++reg) {
252 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
254 s = (*e) ? e + 1 : e;
258 #if defined(CONFIG_MISC_INIT_R)
259 /* miscellaneous platform dependent initialisations */
263 /* enable exceptions */
264 enable_interrupts ();
266 #ifdef CONFIG_DRIVER_CS8900
267 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
270 #ifdef BOARD_POST_INIT
274 /* main_loop() can return to retry autoboot, if so just run it again. */
279 /* NOTREACHED - no way out of command loop except booting */
284 puts ("### ERROR ### Please RESET the board ###\n");
288 #ifdef CONFIG_MODEM_SUPPORT
289 /* called from main loop (common/main.c) */
290 extern void dbg(const char *fmt, ...);
296 extern char console_buffer[];
297 static inline void mdm_readline(char *buf, int bufsiz);
298 extern void enable_putc(void);
299 extern int hwflow_onoff(int);
301 enable_putc(); /* enable serial_putc() */
304 init_str = getenv("mdm_flow_control");
305 if (init_str && (strcmp(init_str, "rts/cts") == 0))
312 sprintf(env_str, "mdm_init%d", i);
313 if ((init_str = getenv(env_str)) != NULL) {
314 serial_puts(init_str);
317 mdm_readline(console_buffer, CFG_CBSIZE);
318 dbg("ini%d: [%s]", i, console_buffer);
320 if ((strcmp(console_buffer, "OK") == 0) ||
321 (strcmp(console_buffer, "ERROR") == 0)) {
322 dbg("ini%d: cmd done", i);
324 } else /* in case we are originating call ... */
325 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
326 dbg("ini%d: connect", i);
331 break; /* no init string - stop modem init */
338 /* final stage - wait for connect */
339 for(;i > 1;) { /* if 'i' > 1 - wait for connection
340 message from modem */
341 mdm_readline(console_buffer, CFG_CBSIZE);
342 dbg("ini_f: [%s]", console_buffer);
343 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
344 dbg("ini_f: connected");
352 /* 'inline' - We have to do it fast */
353 static inline void mdm_readline(char *buf, int bufsiz)
364 /* dbg("(%c)", c); */
376 return; /* sanity check */
384 #endif /* CONFIG_MODEM_SUPPORT */