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_LAN91C96
58 #include "../drivers/lan91c96.h"
61 * Begin and End of memory area for malloc(), and current "brk"
63 static ulong mem_malloc_start = 0;
64 static ulong mem_malloc_end = 0;
65 static ulong mem_malloc_brk = 0;
68 void mem_malloc_init (ulong dest_addr)
70 mem_malloc_start = dest_addr;
71 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
72 mem_malloc_brk = mem_malloc_start;
74 memset ((void *) mem_malloc_start, 0,
75 mem_malloc_end - mem_malloc_start);
78 void *sbrk (ptrdiff_t increment)
80 ulong old = mem_malloc_brk;
81 ulong new = old + increment;
83 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
88 return ((void *) old);
91 /************************************************************************
93 ************************************************************************
94 * Some of this code should be moved into the core functions,
95 * or dropped completely,
96 * but let's get it working (again) first...
99 static int init_baudrate (void)
101 DECLARE_GLOBAL_DATA_PTR;
103 uchar tmp[64]; /* long enough for environment variables */
104 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
105 gd->bd->bi_baudrate = gd->baudrate = (i > 0)
106 ? (int) simple_strtoul (tmp, NULL, 10)
112 static int display_banner (void)
114 #ifdef CONFIG_SILENT_CONSOLE
115 DECLARE_GLOBAL_DATA_PTR;
117 if (gd->flags & GD_FLG_SILENT)
121 printf ("\n\n%s\n\n", version_string);
122 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
123 _armboot_start, _armboot_end_data, _armboot_end);
124 #ifdef CONFIG_MODEM_SUPPORT
125 puts ("Modem Support enabled\n");
127 #ifdef CONFIG_USE_IRQ
128 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
129 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
136 * WARNING: this code looks "cleaner" than the PowerPC version, but
137 * has the disadvantage that you either get nothing, or everything.
138 * On PowerPC, you might see "DRAM: " before the system hangs - which
139 * gives a simple yet clear indication which part of the
140 * initialization if failing.
142 static int display_dram_config (void)
144 DECLARE_GLOBAL_DATA_PTR;
147 #ifdef CONFIG_SILENT_CONSOLE
148 if (gd->flags & GD_FLG_SILENT)
152 puts ("RAM Configuration:\n");
154 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
155 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
156 print_size (gd->bd->bi_dram[i].size, "\n");
162 static void display_flash_config (ulong size)
164 #ifdef CONFIG_SILENT_CONSOLE
165 DECLARE_GLOBAL_DATA_PTR;
167 if (gd->flags & GD_FLG_SILENT)
171 print_size (size, "\n");
176 * Breathe some life into the board...
178 * Initialize a serial port as console, and carry out some hardware
181 * The first part of initialization is running from Flash memory;
182 * its main purpose is to initialize the RAM so that we
183 * can relocate the monitor code to RAM.
187 * All attempts to come up with a "common" initialization sequence
188 * that works for all boards and architectures failed: some of the
189 * requirements are just _too_ different. To get rid of the resulting
190 * mess of board dependend #ifdef'ed code we now make the whole
191 * initialization sequence configurable to the user.
193 * The requirements for any new initalization function is simple: it
194 * receives a pointer to the "global data" structure as it's only
195 * argument, and returns an integer return code, where 0 means
196 * "continue" and != 0 means "fatal error, hang the system".
198 typedef int (init_fnc_t) (void);
200 init_fnc_t *init_sequence[] = {
201 cpu_init, /* basic cpu dependent setup */
202 board_init, /* basic board dependent setup */
203 interrupt_init, /* set up exceptions */
204 env_init, /* initialize environment */
205 init_baudrate, /* initialze baudrate settings */
206 serial_init, /* serial communications setup */
207 console_init_f, /* stage 1 init of console */
208 display_banner, /* say that we are here */
209 dram_init, /* configure available RAM banks */
211 #if defined(CONFIG_VCMA9)
217 void start_armboot (void)
219 DECLARE_GLOBAL_DATA_PTR;
222 init_fnc_t **init_fnc_ptr;
224 #if defined(CONFIG_VFD)
228 /* Pointer is writable since we allocated a register for it */
229 gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
230 memset ((void*)gd, 0, sizeof (gd_t));
231 gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
232 memset (gd->bd, 0, sizeof (bd_t));
234 monitor_flash_len = _armboot_end_data - _armboot_start;
236 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
237 if ((*init_fnc_ptr)() != 0) {
242 /* configure available FLASH banks */
243 size = flash_init ();
244 display_flash_config (size);
248 # define PAGE_SIZE 4096
251 * reserve memory for VFD display (always full pages)
253 /* armboot_end is defined in the board-specific linker script */
254 addr = (_armboot_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
255 size = vfd_setmem (addr);
257 #endif /* CONFIG_VFD */
259 /* armboot_start is defined in the board-specific linker script */
260 mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
262 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
264 nand_init(); /* go init the NAND */
267 #ifdef CONFIG_HAS_DATAFLASH
268 AT91F_DataflashInit();
269 dataflash_print_info();
272 /* initialize environment */
276 /* must do this after the framebuffer is allocated */
278 #endif /* CONFIG_VFD */
281 gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
290 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
291 s = (i > 0) ? tmp : NULL;
293 for (reg = 0; reg < 6; ++reg) {
294 gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
296 s = (*e) ? e + 1 : e;
300 devices_init (); /* get the devices list going. */
304 console_init_r (); /* fully init console as a device */
306 #if defined(CONFIG_MISC_INIT_R)
307 /* miscellaneous platform dependent initialisations */
311 /* enable exceptions */
312 enable_interrupts ();
314 /* Perform network card initialisation if necessary */
315 #ifdef CONFIG_DRIVER_CS8900
316 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
319 #ifdef CONFIG_DRIVER_LAN91C96
320 if (getenv ("ethaddr")) {
321 smc_set_mac_addr(gd->bd->bi_enetaddr);
324 #endif /* CONFIG_DRIVER_LAN91C96 */
326 /* Initialize from environment */
327 if ((s = getenv ("loadaddr")) != NULL) {
328 load_addr = simple_strtoul (s, NULL, 16);
330 #if (CONFIG_COMMANDS & CFG_CMD_NET)
331 if ((s = getenv ("bootfile")) != NULL) {
332 copy_filename (BootFile, s, sizeof (BootFile));
334 #endif /* CFG_CMD_NET */
336 #ifdef BOARD_POST_INIT
340 /* main_loop() can return to retry autoboot, if so just run it again. */
345 /* NOTREACHED - no way out of command loop except booting */
350 puts ("### ERROR ### Please RESET the board ###\n");
354 #ifdef CONFIG_MODEM_SUPPORT
355 /* called from main loop (common/main.c) */
356 extern void dbg(const char *fmt, ...);
362 extern char console_buffer[];
363 static inline void mdm_readline(char *buf, int bufsiz);
364 extern void enable_putc(void);
365 extern int hwflow_onoff(int);
367 enable_putc(); /* enable serial_putc() */
370 init_str = getenv("mdm_flow_control");
371 if (init_str && (strcmp(init_str, "rts/cts") == 0))
378 sprintf(env_str, "mdm_init%d", i);
379 if ((init_str = getenv(env_str)) != NULL) {
380 serial_puts(init_str);
383 mdm_readline(console_buffer, CFG_CBSIZE);
384 dbg("ini%d: [%s]", i, console_buffer);
386 if ((strcmp(console_buffer, "OK") == 0) ||
387 (strcmp(console_buffer, "ERROR") == 0)) {
388 dbg("ini%d: cmd done", i);
390 } else /* in case we are originating call ... */
391 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
392 dbg("ini%d: connect", i);
397 break; /* no init string - stop modem init */
404 /* final stage - wait for connect */
405 for(;i > 1;) { /* if 'i' > 1 - wait for connection
406 message from modem */
407 mdm_readline(console_buffer, CFG_CBSIZE);
408 dbg("ini_f: [%s]", console_buffer);
409 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
410 dbg("ini_f: connected");
418 /* 'inline' - We have to do it fast */
419 static inline void mdm_readline(char *buf, int bufsiz)
430 /* dbg("(%c)", c); */
442 return; /* sanity check */
450 #endif /* CONFIG_MODEM_SUPPORT */