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 #if !defined(CONFIG_MODEM_SUPPORT)
52 void mem_malloc_init (ulong dest_addr)
54 mem_malloc_start = dest_addr;
55 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
56 mem_malloc_brk = mem_malloc_start;
58 memset ((void *) mem_malloc_start, 0,
59 mem_malloc_end - mem_malloc_start);
62 void *sbrk (ptrdiff_t increment)
64 ulong old = mem_malloc_brk;
65 ulong new = old + increment;
67 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
72 return ((void *) old);
75 /************************************************************************
77 ************************************************************************
78 * Some of this code should be moved into the core functions,
79 * or dropped completely,
80 * but let's get it working (again) first...
83 static int init_baudrate (void)
85 DECLARE_GLOBAL_DATA_PTR;
87 uchar tmp[64]; /* long enough for environment variables */
88 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
90 gd->baudrate = (i > 0)
91 ? (int) simple_strtoul (tmp, NULL, 10)
97 static int display_banner (void)
100 printf ("\n\n%s\n\n", version_string);
101 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
102 _armboot_start, _armboot_end_data, _armboot_end);
103 #ifdef CONFIG_MODEM_SUPPORT
104 puts ("Modem Support enabled\n");
106 #ifdef CONFIG_USE_IRQ
107 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
108 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
114 * WARNING: this code looks "cleaner" than the PowerPC version, but
115 * has the disadvantage that you either get nothing, or everything.
116 * On PowerPC, you might see "DRAM: " before the system hangs - which
117 * gives a simple yet clear indication which part of the
118 * initialization if failing.
120 static int display_dram_config (void)
122 DECLARE_GLOBAL_DATA_PTR;
125 puts ("DRAM Configuration:\n");
127 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
128 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
129 print_size (gd->bd->bi_dram[i].size, "\n");
135 static void display_flash_config (ulong size)
138 print_size (size, "\n");
144 * Breath some life into the board...
146 * Initialize an SMC for serial comms, and carry out some hardware
149 * The first part of initialization is running from Flash memory;
150 * its main purpose is to initialize the RAM so that we
151 * can relocate the monitor code to RAM.
155 * All attempts to come up with a "common" initialization sequence
156 * that works for all boards and architectures failed: some of the
157 * requirements are just _too_ different. To get rid of the resulting
158 * mess of board dependend #ifdef'ed code we now make the whole
159 * initialization sequence configurable to the user.
161 * The requirements for any new initalization function is simple: it
162 * receives a pointer to the "global data" structure as it's only
163 * argument, and returns an integer return code, where 0 means
164 * "continue" and != 0 means "fatal error, hang the system".
166 typedef int (init_fnc_t) (void);
168 init_fnc_t *init_sequence[] = {
169 cpu_init, /* basic cpu dependent setup */
170 board_init, /* basic board dependent setup */
171 interrupt_init, /* set up exceptions */
172 env_init, /* initialize environment */
173 init_baudrate, /* initialze baudrate settings */
174 serial_init, /* serial communications setup */
175 display_banner, /* say that we are here */
176 dram_init, /* configure available RAM banks */
182 void start_armboot (void)
184 DECLARE_GLOBAL_DATA_PTR;
189 init_fnc_t **init_fnc_ptr;
190 #if defined(CONFIG_VFD) && !defined(CONFIG_MODEM_SUPPORT)
194 /* Pointer is writable since we allocated a register for it */
196 memset (gd, 0, sizeof (gd_t));
198 memset (gd->bd, 0, sizeof (bd_t));
200 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
201 if ((*init_fnc_ptr)() != 0) {
206 /* configure available FLASH banks */
207 size = flash_init ();
208 display_flash_config (size);
211 #ifndef CONFIG_MODEM_SUPPORT
213 #define PAGE_SIZE 4096
216 * reserve memory for VFD display (always full pages)
218 /* armboot_real_end is defined in the board-specific linker script */
219 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
220 size = vfd_setmem (addr);
222 /* round to the next page boundary */
224 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
225 mem_malloc_init (addr);
226 #endif /* CONFIG_MODEM_SUPPORT */
228 /* armboot_real_end is defined in the board-specific linker script */
229 mem_malloc_init (_armboot_real_end);
230 #endif /* CONFIG_VFD */
233 #ifndef CONFIG_MODEM_SUPPORT
234 /* must do this after the framebuffer is allocated */
236 #endif /* CONFIG_MODEM_SUPPORT */
238 /* initialize environment */
242 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
251 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
252 s = (i > 0) ? tmp : NULL;
254 for (reg = 0; reg < 6; ++reg) {
255 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
257 s = (*e) ? e + 1 : e;
261 #if defined(CONFIG_MISC_INIT_R)
262 /* miscellaneous platform dependent initialisations */
266 /* enable exceptions */
267 enable_interrupts ();
269 #ifdef CONFIG_DRIVER_CS8900
270 if (!getenv ("ethaddr")) {
271 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
275 #ifdef BOARD_POST_INIT
279 /* main_loop() can return to retry autoboot, if so just run it again. */
284 /* NOTREACHED - no way out of command loop except booting */
289 puts ("### ERROR ### Please RESET the board ###\n");
293 #ifdef CONFIG_MODEM_SUPPORT
294 /* called from main loop (common/main.c) */
295 extern void dbg(const char *fmt, ...);
301 extern char console_buffer[];
302 static inline void mdm_readline(char *buf, int bufsiz);
303 extern void enable_putc(void);
304 extern int hwflow_onoff(int);
306 enable_putc(); /* enable serial_putc() */
309 init_str = getenv("mdm_flow_control");
310 if (init_str && (strcmp(init_str, "rts/cts") == 0))
317 sprintf(env_str, "mdm_init%d", i);
318 if ((init_str = getenv(env_str)) != NULL) {
319 serial_puts(init_str);
322 mdm_readline(console_buffer, CFG_CBSIZE);
323 dbg("ini%d: [%s]", i, console_buffer);
325 if ((strcmp(console_buffer, "OK") == 0) ||
326 (strcmp(console_buffer, "ERROR") == 0)) {
327 dbg("ini%d: cmd done", i);
329 } else /* in case we are originating call ... */
330 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
331 dbg("ini%d: connect", i);
336 break; /* no init string - stop modem init */
343 /* final stage - wait for connect */
344 for(;i > 1;) { /* if 'i' > 1 - wait for connection
345 message from modem */
346 mdm_readline(console_buffer, CFG_CBSIZE);
347 dbg("ini_f: [%s]", console_buffer);
348 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
349 dbg("ini_f: connected");
357 /* 'inline' - We have to do it fast */
358 static inline void mdm_readline(char *buf, int bufsiz)
369 /* dbg("(%c)", c); */
381 return; /* sanity check */
389 #endif /* CONFIG_MODEM_SUPPORT */