blob: 65a0bc38d4a332a68b7c21c4522cfb4a7fe4bd55 [file] [log] [blame]
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>
wdenkc0218802003-03-27 12:09:35 +000028#include <version.h>
29#include <net.h>
30#include <environment.h>
31
32#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
33 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
34 defined(CFG_ENV_IS_IN_NVRAM)
35#define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
36#else
37#define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
38#endif
39
40#undef DEBUG
41
42extern int timer_init(void);
43
wdenk7cb22f92003-12-27 19:24:54 +000044extern int incaip_set_cpuclk(void);
45
wdenk3b57fe02003-05-30 12:48:29 +000046extern ulong uboot_end_data;
47extern ulong uboot_end;
48
49ulong monitor_flash_len;
50
wdenkc0218802003-03-27 12:09:35 +000051const char version_string[] =
52 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
53
54static char *failed = "*** failed ***\n";
55
56/*
57 * Begin and End of memory area for malloc(), and current "brk"
58 */
59static ulong mem_malloc_start;
60static ulong mem_malloc_end;
61static ulong mem_malloc_brk;
62
63
64/*
65 * The Malloc area is immediately below the monitor copy in DRAM
66 */
67static void mem_malloc_init (void)
68{
69 DECLARE_GLOBAL_DATA_PTR;
70
71 ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
72
73 mem_malloc_end = dest_addr;
74 mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
75 mem_malloc_brk = mem_malloc_start;
76
77 memset ((void *) mem_malloc_start,
78 0,
79 mem_malloc_end - mem_malloc_start);
80}
81
82void *sbrk (ptrdiff_t increment)
83{
84 ulong old = mem_malloc_brk;
85 ulong new = old + increment;
86
87 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
88 return (NULL);
89 }
90 mem_malloc_brk = new;
91 return ((void *) old);
92}
93
94
95static int init_func_ram (void)
96{
97 DECLARE_GLOBAL_DATA_PTR;
98
99#ifdef CONFIG_BOARD_TYPES
100 int board_type = gd->board_type;
101#else
102 int board_type = 0; /* use dummy arg */
103#endif
104 puts ("DRAM: ");
105
106 if ((gd->ram_size = initdram (board_type)) > 0) {
107 print_size (gd->ram_size, "\n");
108 return (0);
109 }
110 puts (failed);
111 return (1);
112}
113
114static int display_banner(void)
115{
116
117 printf ("\n\n%s\n\n", version_string);
118 return (0);
119}
120
121static void display_flash_config(ulong size)
122{
123 puts ("Flash: ");
124 print_size (size, "\n");
125}
126
127
128static int init_baudrate (void)
129{
130 DECLARE_GLOBAL_DATA_PTR;
131
132 uchar tmp[64]; /* long enough for environment variables */
133 int i = getenv_r ("baudrate", tmp, sizeof (tmp));
134
135 gd->baudrate = (i > 0)
136 ? (int) simple_strtoul (tmp, NULL, 10)
137 : CONFIG_BAUDRATE;
138
139 return (0);
140}
141
142
143/*
144 * Breath some life into the board...
145 *
146 * The first part of initialization is running from Flash memory;
147 * its main purpose is to initialize the RAM so that we
148 * can relocate the monitor code to RAM.
149 */
150
151/*
152 * All attempts to come up with a "common" initialization sequence
153 * that works for all boards and architectures failed: some of the
154 * requirements are just _too_ different. To get rid of the resulting
155 * mess of board dependend #ifdef'ed code we now make the whole
156 * initialization sequence configurable to the user.
157 *
158 * The requirements for any new initalization function is simple: it
159 * receives a pointer to the "global data" structure as it's only
160 * argument, and returns an integer return code, where 0 means
161 * "continue" and != 0 means "fatal error, hang the system".
162 */
163typedef int (init_fnc_t) (void);
164
165init_fnc_t *init_sequence[] = {
166 timer_init,
167 env_init, /* initialize environment */
wdenk7cb22f92003-12-27 19:24:54 +0000168#ifdef CONFIG_INCA_IP
169 incaip_set_cpuclk, /* set cpu clock according to environment variable */
170#endif
wdenkc0218802003-03-27 12:09:35 +0000171 init_baudrate, /* initialze baudrate settings */
172 serial_init, /* serial communications setup */
173 console_init_f,
174 display_banner, /* say that we are here */
wdenk85ec0bc2003-03-31 16:34:49 +0000175 checkboard,
wdenkc0218802003-03-27 12:09:35 +0000176 init_func_ram,
177 NULL,
178};
179
180
181void board_init_f(ulong bootflag)
182{
183 DECLARE_GLOBAL_DATA_PTR;
184
185 gd_t gd_data, *id;
186 bd_t *bd;
187 init_fnc_t **init_fnc_ptr;
wdenk3b57fe02003-05-30 12:48:29 +0000188 ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE;
wdenk3e386912003-04-05 00:53:31 +0000189#ifdef CONFIG_PURPLE
190 void copy_code (ulong);
191#endif
wdenkc0218802003-03-27 12:09:35 +0000192
193 /* Pointer is writable since we allocated a register for it.
194 */
195 gd = &gd_data;
wdenk27b207f2003-07-24 23:38:38 +0000196 memset ((void *)gd, 0, sizeof (gd_t));
wdenkc0218802003-03-27 12:09:35 +0000197
198 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
199 if ((*init_fnc_ptr)() != 0) {
200 hang ();
201 }
202 }
203
204 /*
205 * Now that we have DRAM mapped and working, we can
206 * relocate the code and continue running from DRAM.
207 */
208 addr = CFG_SDRAM_BASE + gd->ram_size;
209
210 /* We can reserve some RAM "on top" here.
211 */
212
213 /* round down to next 4 kB limit.
214 */
215 addr &= ~(4096 - 1);
216#ifdef DEBUG
217 printf ("Top of RAM usable for U-Boot at: %08lx\n", addr);
218#endif
wdenk8bde7f72003-06-27 21:31:46 +0000219
wdenkc0218802003-03-27 12:09:35 +0000220 /* Reserve memory for U-Boot code, data & bss
wdenk3b57fe02003-05-30 12:48:29 +0000221 * round down to next 16 kB limit
wdenkc0218802003-03-27 12:09:35 +0000222 */
223 addr -= len;
wdenk3b57fe02003-05-30 12:48:29 +0000224 addr &= ~(16 * 1024 - 1);
wdenkc0218802003-03-27 12:09:35 +0000225
226#ifdef DEBUG
227 printf ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
228#endif
229
230 /* Reserve memory for malloc() arena.
231 */
232 addr_sp = addr - TOTAL_MALLOC_LEN;
233#ifdef DEBUG
234 printf ("Reserving %dk for malloc() at: %08lx\n",
235 TOTAL_MALLOC_LEN >> 10, addr_sp);
236#endif
237
238 /*
239 * (permanently) allocate a Board Info struct
240 * and a permanent copy of the "global" data
241 */
242 addr_sp -= sizeof(bd_t);
243 bd = (bd_t *)addr_sp;
244 gd->bd = bd;
245#ifdef DEBUG
246 printf ("Reserving %d Bytes for Board Info at: %08lx\n",
247 sizeof(bd_t), addr_sp);
248#endif
249 addr_sp -= sizeof(gd_t);
250 id = (gd_t *)addr_sp;
251#ifdef DEBUG
252 printf ("Reserving %d Bytes for Global Data at: %08lx\n",
253 sizeof (gd_t), addr_sp);
254#endif
255
256 /* Reserve memory for boot params.
257 */
258 addr_sp -= CFG_BOOTPARAMS_LEN;
259 bd->bi_boot_params = addr_sp;
260#ifdef DEBUG
261 printf ("Reserving %dk for malloc() at: %08lx\n",
262 CFG_BOOTPARAMS_LEN >> 10, addr_sp);
263#endif
264
265 /*
266 * Finally, we set up a new (bigger) stack.
267 *
268 * Leave some safety gap for SP, force alignment on 16 byte boundary
269 * Clear initial stack frame
270 */
271 addr_sp -= 16;
272 addr_sp &= ~0xF;
273 *((ulong *) addr_sp)-- = 0;
274 *((ulong *) addr_sp)-- = 0;
275#ifdef DEBUG
276 printf ("Stack Pointer at: %08lx\n", addr_sp);
277#endif
278 /*
279 * Save local variables to board info struct
280 */
281 bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
282 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
283 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
284
wdenk27b207f2003-07-24 23:38:38 +0000285 memcpy (id, (void *)gd, sizeof (gd_t));
wdenk3e386912003-04-05 00:53:31 +0000286
287 /* On the purple board we copy the code in a special way
288 * in order to solve flash problems
289 */
290#ifdef CONFIG_PURPLE
291 copy_code(addr);
292#endif
293
wdenkc0218802003-03-27 12:09:35 +0000294 relocate_code (addr_sp, id, addr);
295
296 /* NOTREACHED - relocate_code() does not return */
297}
298/************************************************************************
299 *
300 * This is the next part if the initialization sequence: we are now
301 * running from RAM and have a "normal" C environment, i. e. global
302 * data can be written, BSS has been cleared, the stack size in not
303 * that critical any more, etc.
304 *
305 ************************************************************************
306 */
307
308void board_init_r (gd_t *id, ulong dest_addr)
309{
310 DECLARE_GLOBAL_DATA_PTR;
wdenkc0218802003-03-27 12:09:35 +0000311 cmd_tbl_t *cmdtp;
312 ulong size;
313 extern void malloc_bin_reloc (void);
314#ifndef CFG_ENV_IS_NOWHERE
315 extern char * env_name_spec;
316#endif
317 char *s, *e;
318 bd_t *bd;
319 int i;
320
321 gd = id;
322 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
323
324#ifdef DEBUG
325 printf ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
326#endif
327
328 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
329
wdenk3b57fe02003-05-30 12:48:29 +0000330 monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
331
wdenkc0218802003-03-27 12:09:35 +0000332 /*
333 * We have to relocate the command table manually
334 */
wdenk8bde7f72003-06-27 21:31:46 +0000335 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
wdenkc0218802003-03-27 12:09:35 +0000336 ulong addr;
337
338 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
339#if 0
340 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
341 cmdtp->name, (ulong) (cmdtp->cmd), addr);
342#endif
343 cmdtp->cmd =
344 (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
345
346 addr = (ulong)(cmdtp->name) + gd->reloc_off;
347 cmdtp->name = (char *)addr;
348
349 if (cmdtp->usage) {
350 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
351 cmdtp->usage = (char *)addr;
352 }
353#ifdef CFG_LONGHELP
354 if (cmdtp->help) {
355 addr = (ulong)(cmdtp->help) + gd->reloc_off;
356 cmdtp->help = (char *)addr;
357 }
358#endif
359 }
360 /* there are some other pointer constants we must deal with */
361#ifndef CFG_ENV_IS_NOWHERE
362 env_name_spec += gd->reloc_off;
363#endif
wdenk8bde7f72003-06-27 21:31:46 +0000364
wdenkc0218802003-03-27 12:09:35 +0000365 /* configure available FLASH banks */
366 size = flash_init();
367 display_flash_config (size);
368
369 bd = gd->bd;
370 bd->bi_flashstart = CFG_FLASH_BASE;
371 bd->bi_flashsize = size;
372#if CFG_MONITOR_BASE == CFG_FLASH_BASE
wdenk3b57fe02003-05-30 12:48:29 +0000373 bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
wdenkc0218802003-03-27 12:09:35 +0000374#else
375 bd->bi_flashoffset = 0;
376#endif
377
378 /* initialize malloc() area */
379 mem_malloc_init();
380 malloc_bin_reloc();
381
382 /* relocate environment function pointers etc. */
383 env_relocate();
384
385 /* board MAC address */
386 s = getenv ("ethaddr");
387 for (i = 0; i < 6; ++i) {
388 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
389 if (s)
390 s = (*e) ? e + 1 : e;
391 }
392
393 /* IP Address */
394 bd->bi_ip_addr = getenv_IPaddr("ipaddr");
395
wdenkf4863a72004-02-07 01:27:10 +0000396#if defined(CONFIG_PCI)
397 /*
398 * Do pci configuration
399 */
400 pci_init();
401#endif
402
wdenkc0218802003-03-27 12:09:35 +0000403/** leave this here (after malloc(), environment and PCI are working) **/
404 /* Initialize devices */
405 devices_init ();
406
wdenk27b207f2003-07-24 23:38:38 +0000407 jumptable_init ();
wdenkc0218802003-03-27 12:09:35 +0000408
409 /* Initialize the console (after the relocation and devices init) */
410 console_init_r ();
411/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
412
wdenk3e386912003-04-05 00:53:31 +0000413 /* Initialize from environment */
414 if ((s = getenv ("loadaddr")) != NULL) {
415 load_addr = simple_strtoul (s, NULL, 16);
416 }
417#if (CONFIG_COMMANDS & CFG_CMD_NET)
418 if ((s = getenv ("bootfile")) != NULL) {
419 copy_filename (BootFile, s, sizeof (BootFile));
420 }
421#endif /* CFG_CMD_NET */
422
423#if defined(CONFIG_MISC_INIT_R)
424 /* miscellaneous platform dependent initialisations */
425 misc_init_r ();
426#endif
427
wdenkc0218802003-03-27 12:09:35 +0000428#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
429 puts ("Net: ");
430 eth_initialize(gd->bd);
431#endif
432
433 /* main_loop() can return to retry autoboot, if so just run it again. */
434 for (;;) {
435 main_loop ();
436 }
437
438 /* NOTREACHED - no way out of command loop except booting */
439}
440
441void hang (void)
442{
443 puts ("### ERROR ### Please RESET the board ###\n");
444 for (;;);
445}