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wdenkc0218802003-03-27 12:09:35 +00001/*
2 * (C) Copyright 2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <command.h>
26#include <malloc.h>
27#include <devices.h>
28#include <syscall.h>
29#include <version.h>
30#include <net.h>
31#include <environment.h>
32
33#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
34 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
35 defined(CFG_ENV_IS_IN_NVRAM)
36#define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
37#else
38#define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
39#endif
40
41#undef DEBUG
42
43extern int timer_init(void);
44
wdenk3b57fe02003-05-30 12:48:29 +000045extern ulong uboot_end_data;
46extern ulong uboot_end;
47
48ulong monitor_flash_len;
49
wdenkc0218802003-03-27 12:09:35 +000050const char version_string[] =
51 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
52
53static char *failed = "*** failed ***\n";
54
55/*
56 * Begin and End of memory area for malloc(), and current "brk"
57 */
58static ulong mem_malloc_start;
59static ulong mem_malloc_end;
60static ulong mem_malloc_brk;
61
62
63/*
64 * The Malloc area is immediately below the monitor copy in DRAM
65 */
66static void mem_malloc_init (void)
67{
68 DECLARE_GLOBAL_DATA_PTR;
69
70 ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
71
72 mem_malloc_end = dest_addr;
73 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
74 mem_malloc_brk = mem_malloc_start;
75
76 memset ((void *) mem_malloc_start,
77 0,
78 mem_malloc_end - mem_malloc_start);
79}
80
81void *sbrk (ptrdiff_t increment)
82{
83 ulong old = mem_malloc_brk;
84 ulong new = old + increment;
85
86 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
87 return (NULL);
88 }
89 mem_malloc_brk = new;
90 return ((void *) old);
91}
92
93
94static int init_func_ram (void)
95{
96 DECLARE_GLOBAL_DATA_PTR;
97
98#ifdef CONFIG_BOARD_TYPES
99 int board_type = gd->board_type;
100#else
101 int board_type = 0; /* use dummy arg */
102#endif
103 puts ("DRAM: ");
104
105 if ((gd->ram_size = initdram (board_type)) > 0) {
106 print_size (gd->ram_size, "\n");
107 return (0);
108 }
109 puts (failed);
110 return (1);
111}
112
113static int display_banner(void)
114{
115
116 printf ("\n\n%s\n\n", version_string);
117 return (0);
118}
119
120static void display_flash_config(ulong size)
121{
122 puts ("Flash: ");
123 print_size (size, "\n");
124}
125
126
127static int init_baudrate (void)
128{
129 DECLARE_GLOBAL_DATA_PTR;
130
131 uchar tmp[64]; /* long enough for environment variables */
132 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
133
134 gd->baudrate = (i > 0)
135 ? (int) simple_strtoul (tmp, NULL, 10)
136 : CONFIG_BAUDRATE;
137
138 return (0);
139}
140
141
142/*
143 * Breath some life into the board...
144 *
145 * The first part of initialization is running from Flash memory;
146 * its main purpose is to initialize the RAM so that we
147 * can relocate the monitor code to RAM.
148 */
149
150/*
151 * All attempts to come up with a "common" initialization sequence
152 * that works for all boards and architectures failed: some of the
153 * requirements are just _too_ different. To get rid of the resulting
154 * mess of board dependend #ifdef'ed code we now make the whole
155 * initialization sequence configurable to the user.
156 *
157 * The requirements for any new initalization function is simple: it
158 * receives a pointer to the "global data" structure as it's only
159 * argument, and returns an integer return code, where 0 means
160 * "continue" and != 0 means "fatal error, hang the system".
161 */
162typedef int (init_fnc_t) (void);
163
164init_fnc_t *init_sequence[] = {
165 timer_init,
166 env_init, /* initialize environment */
167 init_baudrate, /* initialze baudrate settings */
168 serial_init, /* serial communications setup */
169 console_init_f,
170 display_banner, /* say that we are here */
wdenk85ec0bc2003-03-31 16:34:49 +0000171 checkboard,
wdenkc0218802003-03-27 12:09:35 +0000172 init_func_ram,
173 NULL,
174};
175
176
177void board_init_f(ulong bootflag)
178{
179 DECLARE_GLOBAL_DATA_PTR;
180
181 gd_t gd_data, *id;
182 bd_t *bd;
183 init_fnc_t **init_fnc_ptr;
wdenk3b57fe02003-05-30 12:48:29 +0000184 ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE;
wdenk3e386912003-04-05 00:53:31 +0000185#ifdef CONFIG_PURPLE
186 void copy_code (ulong);
187#endif
wdenkc0218802003-03-27 12:09:35 +0000188
189 /* Pointer is writable since we allocated a register for it.
190 */
191 gd = &gd_data;
192 memset (gd, 0, sizeof (gd_t));
193
194 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
195 if ((*init_fnc_ptr)() != 0) {
196 hang ();
197 }
198 }
199
200 /*
201 * Now that we have DRAM mapped and working, we can
202 * relocate the code and continue running from DRAM.
203 */
204 addr = CFG_SDRAM_BASE + gd->ram_size;
205
206 /* We can reserve some RAM "on top" here.
207 */
208
209 /* round down to next 4 kB limit.
210 */
211 addr &= ~(4096 - 1);
212#ifdef DEBUG
213 printf ("Top of RAM usable for U-Boot at: %08lx\n", addr);
214#endif
wdenk8bde7f72003-06-27 21:31:46 +0000215
wdenkc0218802003-03-27 12:09:35 +0000216 /* Reserve memory for U-Boot code, data & bss
wdenk3b57fe02003-05-30 12:48:29 +0000217 * round down to next 16 kB limit
wdenkc0218802003-03-27 12:09:35 +0000218 */
219 addr -= len;
wdenk3b57fe02003-05-30 12:48:29 +0000220 addr &= ~(16 * 1024 - 1);
wdenkc0218802003-03-27 12:09:35 +0000221
222#ifdef DEBUG
223 printf ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
224#endif
225
226 /* Reserve memory for malloc() arena.
227 */
228 addr_sp = addr - TOTAL_MALLOC_LEN;
229#ifdef DEBUG
230 printf ("Reserving %dk for malloc() at: %08lx\n",
231 TOTAL_MALLOC_LEN >> 10, addr_sp);
232#endif
233
234 /*
235 * (permanently) allocate a Board Info struct
236 * and a permanent copy of the "global" data
237 */
238 addr_sp -= sizeof(bd_t);
239 bd = (bd_t *)addr_sp;
240 gd->bd = bd;
241#ifdef DEBUG
242 printf ("Reserving %d Bytes for Board Info at: %08lx\n",
243 sizeof(bd_t), addr_sp);
244#endif
245 addr_sp -= sizeof(gd_t);
246 id = (gd_t *)addr_sp;
247#ifdef DEBUG
248 printf ("Reserving %d Bytes for Global Data at: %08lx\n",
249 sizeof (gd_t), addr_sp);
250#endif
251
252 /* Reserve memory for boot params.
253 */
254 addr_sp -= CFG_BOOTPARAMS_LEN;
255 bd->bi_boot_params = addr_sp;
256#ifdef DEBUG
257 printf ("Reserving %dk for malloc() at: %08lx\n",
258 CFG_BOOTPARAMS_LEN >> 10, addr_sp);
259#endif
260
261 /*
262 * Finally, we set up a new (bigger) stack.
263 *
264 * Leave some safety gap for SP, force alignment on 16 byte boundary
265 * Clear initial stack frame
266 */
267 addr_sp -= 16;
268 addr_sp &= ~0xF;
269 *((ulong *) addr_sp)-- = 0;
270 *((ulong *) addr_sp)-- = 0;
271#ifdef DEBUG
272 printf ("Stack Pointer at: %08lx\n", addr_sp);
273#endif
274 /*
275 * Save local variables to board info struct
276 */
277 bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
278 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
279 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
280
281 memcpy (id, gd, sizeof (gd_t));
wdenk3e386912003-04-05 00:53:31 +0000282
283 /* On the purple board we copy the code in a special way
284 * in order to solve flash problems
285 */
286#ifdef CONFIG_PURPLE
287 copy_code(addr);
288#endif
289
wdenkc0218802003-03-27 12:09:35 +0000290 relocate_code (addr_sp, id, addr);
291
292 /* NOTREACHED - relocate_code() does not return */
293}
294/************************************************************************
295 *
296 * This is the next part if the initialization sequence: we are now
297 * running from RAM and have a "normal" C environment, i. e. global
298 * data can be written, BSS has been cleared, the stack size in not
299 * that critical any more, etc.
300 *
301 ************************************************************************
302 */
303
304void board_init_r (gd_t *id, ulong dest_addr)
305{
306 DECLARE_GLOBAL_DATA_PTR;
wdenkc0218802003-03-27 12:09:35 +0000307 cmd_tbl_t *cmdtp;
308 ulong size;
309 extern void malloc_bin_reloc (void);
310#ifndef CFG_ENV_IS_NOWHERE
311 extern char * env_name_spec;
312#endif
313 char *s, *e;
314 bd_t *bd;
315 int i;
316
317 gd = id;
318 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
319
320#ifdef DEBUG
321 printf ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
322#endif
323
324 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
325
wdenk3b57fe02003-05-30 12:48:29 +0000326 monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
327
wdenkc0218802003-03-27 12:09:35 +0000328 /*
329 * We have to relocate the command table manually
330 */
wdenk8bde7f72003-06-27 21:31:46 +0000331 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
wdenkc0218802003-03-27 12:09:35 +0000332 ulong addr;
333
334 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
335#if 0
336 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
337 cmdtp->name, (ulong) (cmdtp->cmd), addr);
338#endif
339 cmdtp->cmd =
340 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
341
342 addr = (ulong)(cmdtp->name) + gd->reloc_off;
343 cmdtp->name = (char *)addr;
344
345 if (cmdtp->usage) {
346 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
347 cmdtp->usage = (char *)addr;
348 }
349#ifdef CFG_LONGHELP
350 if (cmdtp->help) {
351 addr = (ulong)(cmdtp->help) + gd->reloc_off;
352 cmdtp->help = (char *)addr;
353 }
354#endif
355 }
356 /* there are some other pointer constants we must deal with */
357#ifndef CFG_ENV_IS_NOWHERE
358 env_name_spec += gd->reloc_off;
359#endif
wdenk8bde7f72003-06-27 21:31:46 +0000360
wdenkc0218802003-03-27 12:09:35 +0000361 /* configure available FLASH banks */
362 size = flash_init();
363 display_flash_config (size);
364
365 bd = gd->bd;
366 bd->bi_flashstart = CFG_FLASH_BASE;
367 bd->bi_flashsize = size;
368#if CFG_MONITOR_BASE == CFG_FLASH_BASE
wdenk3b57fe02003-05-30 12:48:29 +0000369 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
wdenkc0218802003-03-27 12:09:35 +0000370#else
371 bd->bi_flashoffset = 0;
372#endif
373
374 /* initialize malloc() area */
375 mem_malloc_init();
376 malloc_bin_reloc();
377
378 /* relocate environment function pointers etc. */
379 env_relocate();
380
381 /* board MAC address */
382 s = getenv ("ethaddr");
383 for (i = 0; i < 6; ++i) {
384 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
385 if (s)
386 s = (*e) ? e + 1 : e;
387 }
388
389 /* IP Address */
390 bd->bi_ip_addr = getenv_IPaddr("ipaddr");
391
392/** leave this here (after malloc(), environment and PCI are working) **/
393 /* Initialize devices */
394 devices_init ();
395
396 /* allocate syscalls table (console_init_r will fill it in */
397 syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *));
398
399 /* Initialize the console (after the relocation and devices init) */
400 console_init_r ();
401/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
402
wdenk3e386912003-04-05 00:53:31 +0000403 /* Initialize from environment */
404 if ((s = getenv ("loadaddr")) != NULL) {
405 load_addr = simple_strtoul (s, NULL, 16);
406 }
407#if (CONFIG_COMMANDS & CFG_CMD_NET)
408 if ((s = getenv ("bootfile")) != NULL) {
409 copy_filename (BootFile, s, sizeof (BootFile));
410 }
411#endif /* CFG_CMD_NET */
412
413#if defined(CONFIG_MISC_INIT_R)
414 /* miscellaneous platform dependent initialisations */
415 misc_init_r ();
416#endif
417
wdenkc0218802003-03-27 12:09:35 +0000418#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
419 puts ("Net: ");
420 eth_initialize(gd->bd);
421#endif
422
423 /* main_loop() can return to retry autoboot, if so just run it again. */
424 for (;;) {
425 main_loop ();
426 }
427
428 /* NOTREACHED - no way out of command loop except booting */
429}
430
431void hang (void)
432{
433 puts ("### ERROR ### Please RESET the board ###\n");
434 for (;;);
435}