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;
49 static void mem_malloc_init (ulong dest_addr)
51 mem_malloc_start = dest_addr;
52 mem_malloc_end = dest_addr + CONFIG_MALLOC_SIZE;
53 mem_malloc_brk = mem_malloc_start;
55 memset ((void *) mem_malloc_start, 0,
56 mem_malloc_end - mem_malloc_start);
59 void *sbrk (ptrdiff_t increment)
61 ulong old = mem_malloc_brk;
62 ulong new = old + increment;
64 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
69 return ((void *) old);
72 /************************************************************************
74 ************************************************************************
75 * Some of this code should be moved into the core functions,
76 * or dropped completely,
77 * but let's get it working (again) first...
80 static int init_baudrate (void)
82 DECLARE_GLOBAL_DATA_PTR;
84 uchar tmp[64]; /* long enough for environment variables */
85 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
87 gd->baudrate = (i > 0)
88 ? (int) simple_strtoul (tmp, NULL, 10)
94 static int display_banner (void)
97 printf ("\n\n%s\n\n", version_string);
98 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
99 _armboot_start, _armboot_end_data, _armboot_end);
100 #ifdef CONFIG_MODEM_SUPPORT
101 puts ("Modem Support enabled\n");
103 #ifdef CONFIG_USE_IRQ
104 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
105 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
111 * WARNING: this code looks "cleaner" than the PowerPC version, but
112 * has the disadvantage that you either get nothing, or everything.
113 * On PowerPC, you might see "DRAM: " before the system hangs - which
114 * gives a simple yet clear indication which part of the
115 * initialization if failing.
117 static int display_dram_config (void)
119 DECLARE_GLOBAL_DATA_PTR;
122 puts ("DRAM Configuration:\n");
124 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
125 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
126 print_size (gd->bd->bi_dram[i].size, "\n");
132 static void display_flash_config (ulong size)
135 print_size (size, "\n");
141 * Breath some life into the board...
143 * Initialize an SMC for serial comms, and carry out some hardware
146 * The first part of initialization is running from Flash memory;
147 * its main purpose is to initialize the RAM so that we
148 * can relocate the monitor code to RAM.
152 * All attempts to come up with a "common" initialization sequence
153 * that works for all boards and architectures failed: some of the
154 * requirements are just _too_ different. To get rid of the resulting
155 * mess of board dependend #ifdef'ed code we now make the whole
156 * initialization sequence configurable to the user.
158 * The requirements for any new initalization function is simple: it
159 * receives a pointer to the "global data" structure as it's only
160 * argument, and returns an integer return code, where 0 means
161 * "continue" and != 0 means "fatal error, hang the system".
163 typedef int (init_fnc_t) (void);
165 init_fnc_t *init_sequence[] = {
166 cpu_init, /* basic cpu dependent setup */
167 board_init, /* basic board dependent setup */
168 interrupt_init, /* set up exceptions */
169 env_init, /* initialize environment */
170 init_baudrate, /* initialze baudrate settings */
171 serial_init, /* serial communications setup */
173 dram_init, /* configure available RAM banks */
179 void start_armboot (void)
181 DECLARE_GLOBAL_DATA_PTR;
186 init_fnc_t **init_fnc_ptr;
191 /* Pointer is writable since we allocated a register for it */
193 memset (gd, 0, sizeof (gd_t));
195 memset (gd->bd, 0, sizeof (bd_t));
197 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
198 if ((*init_fnc_ptr)() != 0) {
203 /* configure available FLASH banks */
204 size = flash_init ();
205 display_flash_config (size);
209 #define PAGE_SIZE 4096
212 * reserve memory for VFD display (always full pages)
214 /* armboot_real_end is defined in the board-specific linker script */
215 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
216 size = vfd_setmem (addr);
218 /* round to the next page boundary */
220 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
221 mem_malloc_init (addr);
223 /* armboot_real_end is defined in the board-specific linker script */
224 mem_malloc_init (_armboot_real_end);
225 #endif /* CONFIG_VFD */
228 /* must do this after the framebuffer is allocated */
231 /* initialize environment */
235 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
244 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
245 s = (i > 0) ? tmp : NULL;
247 for (reg = 0; reg < 6; ++reg) {
248 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
250 s = (*e) ? e + 1 : e;
254 #if defined(CONFIG_MISC_INIT_R)
255 /* miscellaneous platform dependent initialisations */
259 /* enable exceptions */
260 enable_interrupts ();
262 #ifdef CONFIG_DRIVER_CS8900
263 if (!getenv ("ethaddr")) {
264 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
268 #ifdef BOARD_POST_INIT
272 /* main_loop() can return to retry autoboot, if so just run it again. */
277 /* NOTREACHED - no way out of command loop except booting */
282 puts ("### ERROR ### Please RESET the board ###\n");
286 #ifdef CONFIG_MODEM_SUPPORT
287 /* called from main loop (common/main.c) */
288 extern void dbg(const char *fmt, ...);
294 extern char console_buffer[];
295 static inline void mdm_readline(char *buf, int bufsiz);
296 extern void enable_putc(void);
297 extern int hwflow_onoff(int);
299 enable_putc(); /* enable serial_putc() */
302 init_str = getenv("mdm_flow_control");
303 if (init_str && (strcmp(init_str, "rts/cts") == 0))
310 sprintf(env_str, "mdm_init%d", i);
311 if ((init_str = getenv(env_str)) != NULL) {
312 serial_puts(init_str);
315 mdm_readline(console_buffer, CFG_CBSIZE);
316 dbg("ini%d: [%s]", i, console_buffer);
318 if ((strcmp(console_buffer, "OK") == 0) ||
319 (strcmp(console_buffer, "ERROR") == 0)) {
320 dbg("ini%d: cmd done", i);
322 } else /* in case we are originating call ... */
323 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
324 dbg("ini%d: connect", i);
329 break; /* no init string - stop modem init */
336 /* final stage - wait for connect */
337 for(;i > 1;) { /* if 'i' > 1 - wait for connection
338 message from modem */
339 mdm_readline(console_buffer, CFG_CBSIZE);
340 dbg("ini_f: [%s]", console_buffer);
341 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
342 dbg("ini_f: connected");
350 /* 'inline' - We have to do it fast */
351 static inline void mdm_readline(char *buf, int bufsiz)
362 /* dbg("(%c)", c); */
374 return; /* sanity check */
382 #endif /* CONFIG_MODEM_SUPPORT */