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 ulong monitor_flash_len;
40 #ifdef CONFIG_HAS_DATAFLASH
41 extern int AT91F_DataflashInit(void);
42 extern void dataflash_print_info(void);
45 const char version_string[] =
46 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
48 #ifdef CONFIG_DRIVER_CS8900
49 extern void cs8900_get_enetaddr (uchar * addr);
52 #ifdef CONFIG_DRIVER_LAN91C96
53 #include "../drivers/lan91c96.h"
56 * Begin and End of memory area for malloc(), and current "brk"
58 static ulong mem_malloc_start = 0;
59 static ulong mem_malloc_end = 0;
60 static ulong mem_malloc_brk = 0;
63 void mem_malloc_init (ulong dest_addr)
65 mem_malloc_start = dest_addr;
66 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
67 mem_malloc_brk = mem_malloc_start;
69 memset ((void *) mem_malloc_start, 0,
70 mem_malloc_end - mem_malloc_start);
73 void *sbrk (ptrdiff_t increment)
75 ulong old = mem_malloc_brk;
76 ulong new = old + increment;
78 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
83 return ((void *) old);
86 /************************************************************************
88 ************************************************************************
89 * Some of this code should be moved into the core functions,
90 * or dropped completely,
91 * but let's get it working (again) first...
94 static int init_baudrate (void)
96 DECLARE_GLOBAL_DATA_PTR;
98 uchar tmp[64]; /* long enough for environment variables */
99 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
101 gd->baudrate = (i > 0)
102 ? (int) simple_strtoul (tmp, NULL, 10)
108 static int display_banner (void)
111 printf ("\n\n%s\n\n", version_string);
112 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
113 _armboot_start, _armboot_end_data, _armboot_end);
114 #ifdef CONFIG_MODEM_SUPPORT
115 puts ("Modem Support enabled\n");
117 #ifdef CONFIG_USE_IRQ
118 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
119 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
125 * WARNING: this code looks "cleaner" than the PowerPC version, but
126 * has the disadvantage that you either get nothing, or everything.
127 * On PowerPC, you might see "DRAM: " before the system hangs - which
128 * gives a simple yet clear indication which part of the
129 * initialization if failing.
131 static int display_dram_config (void)
133 DECLARE_GLOBAL_DATA_PTR;
136 puts ("DRAM Configuration:\n");
138 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
139 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
140 print_size (gd->bd->bi_dram[i].size, "\n");
146 static void display_flash_config (ulong size)
149 print_size (size, "\n");
155 * Breath some life into the board...
157 * Initialize an SMC for serial comms, and carry out some hardware
160 * The first part of initialization is running from Flash memory;
161 * its main purpose is to initialize the RAM so that we
162 * can relocate the monitor code to RAM.
166 * All attempts to come up with a "common" initialization sequence
167 * that works for all boards and architectures failed: some of the
168 * requirements are just _too_ different. To get rid of the resulting
169 * mess of board dependend #ifdef'ed code we now make the whole
170 * initialization sequence configurable to the user.
172 * The requirements for any new initalization function is simple: it
173 * receives a pointer to the "global data" structure as it's only
174 * argument, and returns an integer return code, where 0 means
175 * "continue" and != 0 means "fatal error, hang the system".
177 typedef int (init_fnc_t) (void);
179 init_fnc_t *init_sequence[] = {
180 cpu_init, /* basic cpu dependent setup */
181 board_init, /* basic board dependent setup */
182 interrupt_init, /* set up exceptions */
183 env_init, /* initialize environment */
184 init_baudrate, /* initialze baudrate settings */
185 serial_init, /* serial communications setup */
186 display_banner, /* say that we are here */
187 dram_init, /* configure available RAM banks */
189 #if defined(CONFIG_VCMA9)
195 void start_armboot (void)
197 DECLARE_GLOBAL_DATA_PTR;
202 init_fnc_t **init_fnc_ptr;
204 #if defined(CONFIG_VFD)
208 /* Pointer is writable since we allocated a register for it */
210 memset (gd, 0, sizeof (gd_t));
212 memset (gd->bd, 0, sizeof (bd_t));
214 monitor_flash_len = _armboot_end_data - _armboot_start;
216 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
217 if ((*init_fnc_ptr)() != 0) {
222 /* configure available FLASH banks */
223 size = flash_init ();
224 display_flash_config (size);
228 # define PAGE_SIZE 4096
231 * reserve memory for VFD display (always full pages)
233 /* armboot_real_end is defined in the board-specific linker script */
234 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
235 size = vfd_setmem (addr);
237 /* round to the next page boundary */
239 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
240 mem_malloc_init (addr);
242 /* armboot_real_end is defined in the board-specific linker script */
243 mem_malloc_init (_armboot_real_end);
244 #endif /* CONFIG_VFD */
246 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
247 nand_init(); /* go init the NAND */
250 #ifdef CONFIG_HAS_DATAFLASH
251 AT91F_DataflashInit();
252 dataflash_print_info();
255 /* initialize environment */
259 /* must do this after the framebuffer is allocated */
264 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
273 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
274 s = (i > 0) ? tmp : NULL;
276 for (reg = 0; reg < 6; ++reg) {
277 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
279 s = (*e) ? e + 1 : e;
283 #if defined(CONFIG_MISC_INIT_R)
284 /* miscellaneous platform dependent initialisations */
288 /* enable exceptions */
289 enable_interrupts ();
291 #ifdef CONFIG_DRIVER_CS8900
292 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
295 #ifdef CONFIG_DRIVER_LAN91C96
296 if (getenv ("ethaddr")) {
297 smc_set_mac_addr(gd->bd->bi_enetaddr);
300 #endif /* CONFIG_DRIVER_LAN91C96 */
302 /* Initialize from environment */
303 if ((s = getenv ("loadaddr")) != NULL) {
304 load_addr = simple_strtoul (s, NULL, 16);
306 #if (CONFIG_COMMANDS & CFG_CMD_NET)
307 if ((s = getenv ("bootfile")) != NULL) {
308 copy_filename (BootFile, s, sizeof (BootFile));
310 #endif /* CFG_CMD_NET */
312 #ifdef BOARD_POST_INIT
316 /* main_loop() can return to retry autoboot, if so just run it again. */
321 /* NOTREACHED - no way out of command loop except booting */
326 puts ("### ERROR ### Please RESET the board ###\n");
330 #ifdef CONFIG_MODEM_SUPPORT
331 /* called from main loop (common/main.c) */
332 extern void dbg(const char *fmt, ...);
338 extern char console_buffer[];
339 static inline void mdm_readline(char *buf, int bufsiz);
340 extern void enable_putc(void);
341 extern int hwflow_onoff(int);
343 enable_putc(); /* enable serial_putc() */
346 init_str = getenv("mdm_flow_control");
347 if (init_str && (strcmp(init_str, "rts/cts") == 0))
354 sprintf(env_str, "mdm_init%d", i);
355 if ((init_str = getenv(env_str)) != NULL) {
356 serial_puts(init_str);
359 mdm_readline(console_buffer, CFG_CBSIZE);
360 dbg("ini%d: [%s]", i, console_buffer);
362 if ((strcmp(console_buffer, "OK") == 0) ||
363 (strcmp(console_buffer, "ERROR") == 0)) {
364 dbg("ini%d: cmd done", i);
366 } else /* in case we are originating call ... */
367 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
368 dbg("ini%d: connect", i);
373 break; /* no init string - stop modem init */
380 /* final stage - wait for connect */
381 for(;i > 1;) { /* if 'i' > 1 - wait for connection
382 message from modem */
383 mdm_readline(console_buffer, CFG_CBSIZE);
384 dbg("ini_f: [%s]", console_buffer);
385 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
386 dbg("ini_f: connected");
394 /* 'inline' - We have to do it fast */
395 static inline void mdm_readline(char *buf, int bufsiz)
406 /* dbg("(%c)", c); */
418 return; /* sanity check */
426 #endif /* CONFIG_MODEM_SUPPORT */