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,
34 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
35 void nand_init (void);
38 const char version_string[] =
39 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
41 #ifdef CONFIG_DRIVER_CS8900
42 extern void cs8900_get_enetaddr (uchar * addr);
45 #ifdef CONFIG_DRIVER_LAN91C96
46 #include "../drivers/lan91c96.h"
49 * Begin and End of memory area for malloc(), and current "brk"
51 static ulong mem_malloc_start = 0;
52 static ulong mem_malloc_end = 0;
53 static ulong mem_malloc_brk = 0;
56 void mem_malloc_init (ulong dest_addr)
58 mem_malloc_start = dest_addr;
59 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
60 mem_malloc_brk = mem_malloc_start;
62 memset ((void *) mem_malloc_start, 0,
63 mem_malloc_end - mem_malloc_start);
66 void *sbrk (ptrdiff_t increment)
68 ulong old = mem_malloc_brk;
69 ulong new = old + increment;
71 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
76 return ((void *) old);
79 /************************************************************************
81 ************************************************************************
82 * Some of this code should be moved into the core functions,
83 * or dropped completely,
84 * but let's get it working (again) first...
87 static int init_baudrate (void)
89 DECLARE_GLOBAL_DATA_PTR;
91 uchar tmp[64]; /* long enough for environment variables */
92 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
94 gd->baudrate = (i > 0)
95 ? (int) simple_strtoul (tmp, NULL, 10)
101 static int display_banner (void)
104 printf ("\n\n%s\n\n", version_string);
105 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
106 _armboot_start, _armboot_end_data, _armboot_end);
107 #ifdef CONFIG_MODEM_SUPPORT
108 puts ("Modem Support enabled\n");
110 #ifdef CONFIG_USE_IRQ
111 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
112 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
118 * WARNING: this code looks "cleaner" than the PowerPC version, but
119 * has the disadvantage that you either get nothing, or everything.
120 * On PowerPC, you might see "DRAM: " before the system hangs - which
121 * gives a simple yet clear indication which part of the
122 * initialization if failing.
124 static int display_dram_config (void)
126 DECLARE_GLOBAL_DATA_PTR;
129 puts ("DRAM Configuration:\n");
131 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
132 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
133 print_size (gd->bd->bi_dram[i].size, "\n");
139 static void display_flash_config (ulong size)
142 print_size (size, "\n");
148 * Breath some life into the board...
150 * Initialize an SMC for serial comms, and carry out some hardware
153 * The first part of initialization is running from Flash memory;
154 * its main purpose is to initialize the RAM so that we
155 * can relocate the monitor code to RAM.
159 * All attempts to come up with a "common" initialization sequence
160 * that works for all boards and architectures failed: some of the
161 * requirements are just _too_ different. To get rid of the resulting
162 * mess of board dependend #ifdef'ed code we now make the whole
163 * initialization sequence configurable to the user.
165 * The requirements for any new initalization function is simple: it
166 * receives a pointer to the "global data" structure as it's only
167 * argument, and returns an integer return code, where 0 means
168 * "continue" and != 0 means "fatal error, hang the system".
170 typedef int (init_fnc_t) (void);
172 init_fnc_t *init_sequence[] = {
173 cpu_init, /* basic cpu dependent setup */
174 board_init, /* basic board dependent setup */
175 interrupt_init, /* set up exceptions */
176 env_init, /* initialize environment */
177 init_baudrate, /* initialze baudrate settings */
178 serial_init, /* serial communications setup */
179 display_banner, /* say that we are here */
180 dram_init, /* configure available RAM banks */
182 #if defined(CONFIG_VCMA9)
188 void start_armboot (void)
190 DECLARE_GLOBAL_DATA_PTR;
195 init_fnc_t **init_fnc_ptr;
197 #if defined(CONFIG_VFD)
201 /* Pointer is writable since we allocated a register for it */
203 memset (gd, 0, sizeof (gd_t));
205 memset (gd->bd, 0, sizeof (bd_t));
207 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
208 if ((*init_fnc_ptr)() != 0) {
213 /* configure available FLASH banks */
214 size = flash_init ();
215 display_flash_config (size);
219 # define PAGE_SIZE 4096
222 * reserve memory for VFD display (always full pages)
224 /* armboot_real_end is defined in the board-specific linker script */
225 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
226 size = vfd_setmem (addr);
228 /* round to the next page boundary */
230 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
231 mem_malloc_init (addr);
233 /* armboot_real_end is defined in the board-specific linker script */
234 mem_malloc_init (_armboot_real_end);
235 #endif /* CONFIG_VFD */
237 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
238 nand_init(); /* go init the NAND */
241 /* initialize environment */
245 /* must do this after the framebuffer is allocated */
250 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
259 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
260 s = (i > 0) ? tmp : NULL;
262 for (reg = 0; reg < 6; ++reg) {
263 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
265 s = (*e) ? e + 1 : e;
269 #if defined(CONFIG_MISC_INIT_R)
270 /* miscellaneous platform dependent initialisations */
274 /* enable exceptions */
275 enable_interrupts ();
277 #ifdef CONFIG_DRIVER_CS8900
278 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
281 #ifdef CONFIG_DRIVER_LAN91C96
282 if (getenv ("ethaddr")) {
283 smc_set_mac_addr(gd->bd->bi_enetaddr);
286 #endif /* CONFIG_DRIVER_LAN91C96 */
288 /* Initialize from environment */
289 if ((s = getenv ("loadaddr")) != NULL) {
290 load_addr = simple_strtoul (s, NULL, 16);
292 #if (CONFIG_COMMANDS & CFG_CMD_NET)
293 if ((s = getenv ("bootfile")) != NULL) {
294 copy_filename (BootFile, s, sizeof (BootFile));
296 #endif /* CFG_CMD_NET */
298 #ifdef BOARD_POST_INIT
302 /* main_loop() can return to retry autoboot, if so just run it again. */
307 /* NOTREACHED - no way out of command loop except booting */
312 puts ("### ERROR ### Please RESET the board ###\n");
316 #ifdef CONFIG_MODEM_SUPPORT
317 /* called from main loop (common/main.c) */
318 extern void dbg(const char *fmt, ...);
324 extern char console_buffer[];
325 static inline void mdm_readline(char *buf, int bufsiz);
326 extern void enable_putc(void);
327 extern int hwflow_onoff(int);
329 enable_putc(); /* enable serial_putc() */
332 init_str = getenv("mdm_flow_control");
333 if (init_str && (strcmp(init_str, "rts/cts") == 0))
340 sprintf(env_str, "mdm_init%d", i);
341 if ((init_str = getenv(env_str)) != NULL) {
342 serial_puts(init_str);
345 mdm_readline(console_buffer, CFG_CBSIZE);
346 dbg("ini%d: [%s]", i, console_buffer);
348 if ((strcmp(console_buffer, "OK") == 0) ||
349 (strcmp(console_buffer, "ERROR") == 0)) {
350 dbg("ini%d: cmd done", i);
352 } else /* in case we are originating call ... */
353 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
354 dbg("ini%d: connect", i);
359 break; /* no init string - stop modem init */
366 /* final stage - wait for connect */
367 for(;i > 1;) { /* if 'i' > 1 - wait for connection
368 message from modem */
369 mdm_readline(console_buffer, CFG_CBSIZE);
370 dbg("ini_f: [%s]", console_buffer);
371 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
372 dbg("ini_f: connected");
380 /* 'inline' - We have to do it fast */
381 static inline void mdm_readline(char *buf, int bufsiz)
392 /* dbg("(%c)", c); */
404 return; /* sanity check */
412 #endif /* CONFIG_MODEM_SUPPORT */