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);
46 * Begin and End of memory area for malloc(), and current "brk"
48 static ulong mem_malloc_start = 0;
49 static ulong mem_malloc_end = 0;
50 static ulong mem_malloc_brk = 0;
53 void mem_malloc_init (ulong dest_addr)
55 mem_malloc_start = dest_addr;
56 mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
57 mem_malloc_brk = mem_malloc_start;
59 memset ((void *) mem_malloc_start, 0,
60 mem_malloc_end - mem_malloc_start);
63 void *sbrk (ptrdiff_t increment)
65 ulong old = mem_malloc_brk;
66 ulong new = old + increment;
68 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
73 return ((void *) old);
76 /************************************************************************
78 ************************************************************************
79 * Some of this code should be moved into the core functions,
80 * or dropped completely,
81 * but let's get it working (again) first...
84 static int init_baudrate (void)
86 DECLARE_GLOBAL_DATA_PTR;
88 uchar tmp[64]; /* long enough for environment variables */
89 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
91 gd->baudrate = (i > 0)
92 ? (int) simple_strtoul (tmp, NULL, 10)
98 static int display_banner (void)
101 printf ("\n\n%s\n\n", version_string);
102 printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
103 _armboot_start, _armboot_end_data, _armboot_end);
104 #ifdef CONFIG_MODEM_SUPPORT
105 puts ("Modem Support enabled\n");
107 #ifdef CONFIG_USE_IRQ
108 printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
109 printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
115 * WARNING: this code looks "cleaner" than the PowerPC version, but
116 * has the disadvantage that you either get nothing, or everything.
117 * On PowerPC, you might see "DRAM: " before the system hangs - which
118 * gives a simple yet clear indication which part of the
119 * initialization if failing.
121 static int display_dram_config (void)
123 DECLARE_GLOBAL_DATA_PTR;
126 puts ("DRAM Configuration:\n");
128 for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
129 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
130 print_size (gd->bd->bi_dram[i].size, "\n");
136 static void display_flash_config (ulong size)
139 print_size (size, "\n");
145 * Breath some life into the board...
147 * Initialize an SMC for serial comms, and carry out some hardware
150 * The first part of initialization is running from Flash memory;
151 * its main purpose is to initialize the RAM so that we
152 * can relocate the monitor code to RAM.
156 * All attempts to come up with a "common" initialization sequence
157 * that works for all boards and architectures failed: some of the
158 * requirements are just _too_ different. To get rid of the resulting
159 * mess of board dependend #ifdef'ed code we now make the whole
160 * initialization sequence configurable to the user.
162 * The requirements for any new initalization function is simple: it
163 * receives a pointer to the "global data" structure as it's only
164 * argument, and returns an integer return code, where 0 means
165 * "continue" and != 0 means "fatal error, hang the system".
167 typedef int (init_fnc_t) (void);
169 init_fnc_t *init_sequence[] = {
170 cpu_init, /* basic cpu dependent setup */
171 board_init, /* basic board dependent setup */
172 interrupt_init, /* set up exceptions */
173 env_init, /* initialize environment */
174 init_baudrate, /* initialze baudrate settings */
175 serial_init, /* serial communications setup */
176 display_banner, /* say that we are here */
177 dram_init, /* configure available RAM banks */
179 #if defined(CONFIG_VCMA9)
185 void start_armboot (void)
187 DECLARE_GLOBAL_DATA_PTR;
192 init_fnc_t **init_fnc_ptr;
193 #if defined(CONFIG_VFD)
197 /* Pointer is writable since we allocated a register for it */
199 memset (gd, 0, sizeof (gd_t));
201 memset (gd->bd, 0, sizeof (bd_t));
203 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
204 if ((*init_fnc_ptr)() != 0) {
209 /* configure available FLASH banks */
210 size = flash_init ();
211 display_flash_config (size);
215 # define PAGE_SIZE 4096
218 * reserve memory for VFD display (always full pages)
220 /* armboot_real_end is defined in the board-specific linker script */
221 addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
222 size = vfd_setmem (addr);
224 /* round to the next page boundary */
226 addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
227 mem_malloc_init (addr);
229 /* armboot_real_end is defined in the board-specific linker script */
230 mem_malloc_init (_armboot_real_end);
231 #endif /* CONFIG_VFD */
233 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
234 nand_init(); /* go init the NAND */
237 /* initialize environment */
241 /* must do this after the framebuffer is allocated */
246 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
255 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
256 s = (i > 0) ? tmp : NULL;
258 for (reg = 0; reg < 6; ++reg) {
259 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
261 s = (*e) ? e + 1 : e;
265 #if defined(CONFIG_MISC_INIT_R)
266 /* miscellaneous platform dependent initialisations */
270 /* enable exceptions */
271 enable_interrupts ();
273 #ifdef CONFIG_DRIVER_CS8900
274 cs8900_get_enetaddr (gd->bd->bi_enetaddr);
277 #ifdef BOARD_POST_INIT
281 /* main_loop() can return to retry autoboot, if so just run it again. */
286 /* NOTREACHED - no way out of command loop except booting */
291 puts ("### ERROR ### Please RESET the board ###\n");
295 #ifdef CONFIG_MODEM_SUPPORT
296 /* called from main loop (common/main.c) */
297 extern void dbg(const char *fmt, ...);
303 extern char console_buffer[];
304 static inline void mdm_readline(char *buf, int bufsiz);
305 extern void enable_putc(void);
306 extern int hwflow_onoff(int);
308 enable_putc(); /* enable serial_putc() */
311 init_str = getenv("mdm_flow_control");
312 if (init_str && (strcmp(init_str, "rts/cts") == 0))
319 sprintf(env_str, "mdm_init%d", i);
320 if ((init_str = getenv(env_str)) != NULL) {
321 serial_puts(init_str);
324 mdm_readline(console_buffer, CFG_CBSIZE);
325 dbg("ini%d: [%s]", i, console_buffer);
327 if ((strcmp(console_buffer, "OK") == 0) ||
328 (strcmp(console_buffer, "ERROR") == 0)) {
329 dbg("ini%d: cmd done", i);
331 } else /* in case we are originating call ... */
332 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
333 dbg("ini%d: connect", i);
338 break; /* no init string - stop modem init */
345 /* final stage - wait for connect */
346 for(;i > 1;) { /* if 'i' > 1 - wait for connection
347 message from modem */
348 mdm_readline(console_buffer, CFG_CBSIZE);
349 dbg("ini_f: [%s]", console_buffer);
350 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
351 dbg("ini_f: connected");
359 /* 'inline' - We have to do it fast */
360 static inline void mdm_readline(char *buf, int bufsiz)
371 /* dbg("(%c)", c); */
383 return; /* sanity check */
391 #endif /* CONFIG_MODEM_SUPPORT */