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,
36 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
37 void nand_init (void);
40 ulong monitor_flash_len;
42 #ifdef CONFIG_HAS_DATAFLASH
43 extern int AT91F_DataflashInit(void);
44 extern void dataflash_print_info(void);
47 #ifndef CONFIG_IDENT_STRING
48 #define CONFIG_IDENT_STRING ""
51 const char version_string[] =
52 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
54 #ifdef CONFIG_DRIVER_CS8900
55 extern void cs8900_get_enetaddr (uchar * addr);
58 #ifdef CONFIG_DRIVER_LAN91C96
59 #include "../drivers/lan91c96.h"
62 * Begin and End of memory area for malloc(), and current "brk"
64 static ulong mem_malloc_start = 0;
65 static ulong mem_malloc_end = 0;
66 static ulong mem_malloc_brk = 0;
69 void mem_malloc_init (ulong dest_addr)
71 mem_malloc_start = dest_addr;
72 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
73 mem_malloc_brk = mem_malloc_start;
75 memset ((void *) mem_malloc_start, 0,
76 mem_malloc_end - mem_malloc_start);
79 void *sbrk (ptrdiff_t increment)
81 ulong old = mem_malloc_brk;
82 ulong new = old + increment;
84 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
89 return ((void *) old);
92 /************************************************************************
94 ************************************************************************
95 * Some of this code should be moved into the core functions,
96 * or dropped completely,
97 * but let's get it working (again) first...
100 static int init_baudrate (void)
102 DECLARE_GLOBAL_DATA_PTR;
104 uchar tmp[64]; /* long enough for environment variables */
105 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
106 gd->bd->bi_baudrate = gd->baudrate = (i > 0)
107 ? (int) simple_strtoul (tmp, NULL, 10)
113 static int display_banner (void)
116 printf ("\n\n%s\n\n", version_string);
117 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
118 _armboot_start, _armboot_end_data, _armboot_end);
119 #ifdef CONFIG_MODEM_SUPPORT
120 puts ("Modem Support enabled\n");
122 #ifdef CONFIG_USE_IRQ
123 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
124 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
130 * WARNING: this code looks "cleaner" than the PowerPC version, but
131 * has the disadvantage that you either get nothing, or everything.
132 * On PowerPC, you might see "DRAM: " before the system hangs - which
133 * gives a simple yet clear indication which part of the
134 * initialization if failing.
136 static int display_dram_config (void)
138 DECLARE_GLOBAL_DATA_PTR;
141 puts ("DRAM Configuration:\n");
143 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
144 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
145 print_size (gd->bd->bi_dram[i].size, "\n");
151 static void display_flash_config (ulong size)
154 print_size (size, "\n");
159 * Breath some life into the board...
161 * Initialize an SMC for serial comms, and carry out some hardware
164 * The first part of initialization is running from Flash memory;
165 * its main purpose is to initialize the RAM so that we
166 * can relocate the monitor code to RAM.
170 * All attempts to come up with a "common" initialization sequence
171 * that works for all boards and architectures failed: some of the
172 * requirements are just _too_ different. To get rid of the resulting
173 * mess of board dependend #ifdef'ed code we now make the whole
174 * initialization sequence configurable to the user.
176 * The requirements for any new initalization function is simple: it
177 * receives a pointer to the "global data" structure as it's only
178 * argument, and returns an integer return code, where 0 means
179 * "continue" and != 0 means "fatal error, hang the system".
181 typedef int (init_fnc_t) (void);
183 init_fnc_t *init_sequence[] = {
184 cpu_init, /* basic cpu dependent setup */
185 board_init, /* basic board dependent setup */
186 interrupt_init, /* set up exceptions */
187 env_init, /* initialize environment */
188 init_baudrate, /* initialze baudrate settings */
189 serial_init, /* serial communications setup */
190 console_init_f, /* stage 1 init of console */
191 display_banner, /* say that we are here */
192 dram_init, /* configure available RAM banks */
194 #if defined(CONFIG_VCMA9)
200 void start_armboot (void)
202 DECLARE_GLOBAL_DATA_PTR;
207 init_fnc_t **init_fnc_ptr;
209 #if defined(CONFIG_VFD)
213 /* Pointer is writable since we allocated a register for it */
215 memset (gd, 0, sizeof (gd_t));
217 memset (gd->bd, 0, sizeof (bd_t));
219 monitor_flash_len = _armboot_end_data - _armboot_start;
221 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
222 if ((*init_fnc_ptr)() != 0) {
227 /* configure available FLASH banks */
228 size = flash_init ();
229 display_flash_config (size);
233 # define PAGE_SIZE 4096
236 * reserve memory for VFD display (always full pages)
238 /* armboot_real_end is defined in the board-specific linker script */
239 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
240 size = vfd_setmem (addr);
242 /* round to the next page boundary */
244 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
245 mem_malloc_init (addr);
247 /* armboot_real_end is defined in the board-specific linker script */
248 mem_malloc_init (_armboot_real_end);
249 #endif /* CONFIG_VFD */
251 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
252 nand_init(); /* go init the NAND */
255 #ifdef CONFIG_HAS_DATAFLASH
256 AT91F_DataflashInit();
257 dataflash_print_info();
260 /* initialize environment */
264 /* must do this after the framebuffer is allocated */
269 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
278 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
279 s = (i > 0) ? tmp : NULL;
281 for (reg = 0; reg < 6; ++reg) {
282 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
284 s = (*e) ? e + 1 : e;
288 devices_init (); /* get the devices list going. */
290 /* Syscalls are not implemented for ARM. But allocating
291 * this allows the console_init routines to work without #ifdefs
293 syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *));
295 console_init_r (); /* fully init console as a device */
297 #if defined(CONFIG_MISC_INIT_R)
298 /* miscellaneous platform dependent initialisations */
302 /* enable exceptions */
303 enable_interrupts ();
305 #ifdef CONFIG_DRIVER_CS8900
306 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
309 #ifdef CONFIG_DRIVER_LAN91C96
310 if (getenv ("ethaddr")) {
311 smc_set_mac_addr(gd->bd->bi_enetaddr);
314 #endif /* CONFIG_DRIVER_LAN91C96 */
316 /* Initialize from environment */
317 if ((s = getenv ("loadaddr")) != NULL) {
318 load_addr = simple_strtoul (s, NULL, 16);
320 #if (CONFIG_COMMANDS & CFG_CMD_NET)
321 if ((s = getenv ("bootfile")) != NULL) {
322 copy_filename (BootFile, s, sizeof (BootFile));
324 #endif /* CFG_CMD_NET */
326 #ifdef BOARD_POST_INIT
330 /* main_loop() can return to retry autoboot, if so just run it again. */
335 /* NOTREACHED - no way out of command loop except booting */
340 puts ("### ERROR ### Please RESET the board ###\n");
344 #ifdef CONFIG_MODEM_SUPPORT
345 /* called from main loop (common/main.c) */
346 extern void dbg(const char *fmt, ...);
352 extern char console_buffer[];
353 static inline void mdm_readline(char *buf, int bufsiz);
354 extern void enable_putc(void);
355 extern int hwflow_onoff(int);
357 enable_putc(); /* enable serial_putc() */
360 init_str = getenv("mdm_flow_control");
361 if (init_str && (strcmp(init_str, "rts/cts") == 0))
368 sprintf(env_str, "mdm_init%d", i);
369 if ((init_str = getenv(env_str)) != NULL) {
370 serial_puts(init_str);
373 mdm_readline(console_buffer, CFG_CBSIZE);
374 dbg("ini%d: [%s]", i, console_buffer);
376 if ((strcmp(console_buffer, "OK") == 0) ||
377 (strcmp(console_buffer, "ERROR") == 0)) {
378 dbg("ini%d: cmd done", i);
380 } else /* in case we are originating call ... */
381 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
382 dbg("ini%d: connect", i);
387 break; /* no init string - stop modem init */
394 /* final stage - wait for connect */
395 for(;i > 1;) { /* if 'i' > 1 - wait for connection
396 message from modem */
397 mdm_readline(console_buffer, CFG_CBSIZE);
398 dbg("ini_f: [%s]", console_buffer);
399 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
400 dbg("ini_f: connected");
408 /* 'inline' - We have to do it fast */
409 static inline void mdm_readline(char *buf, int bufsiz)
420 /* dbg("(%c)", c); */
432 return; /* sanity check */
440 #endif /* CONFIG_MODEM_SUPPORT */