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wdenk2262cfe2002-11-18 00:14:45 +00001/*
2 * (C) Copyright 2002
3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
wdenk8bde7f72003-06-27 21:31:46 +00004 *
wdenk2262cfe2002-11-18 00:14:45 +00005 * (C) Copyright 2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
wdenk8bde7f72003-06-27 21:31:46 +00007 *
wdenk2262cfe2002-11-18 00:14:45 +00008 * (C) Copyright 2002
9 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
10 * Marius Groeger <mgroeger@sysgo.de>
11 *
12 * See file CREDITS for list of people who contributed to this
13 * project.
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 * MA 02111-1307 USA
29 */
30
31#include <common.h>
32#include <watchdog.h>
33#include <command.h>
34#include <devices.h>
35#include <version.h>
36#include <malloc.h>
wdenk2262cfe2002-11-18 00:14:45 +000037#include <net.h>
38#include <ide.h>
wdenk7a8e9bed2003-05-31 18:35:21 +000039#include <asm/u-boot-i386.h>
wdenk2262cfe2002-11-18 00:14:45 +000040
Wolfgang Denkd87080b2006-03-31 18:32:53 +020041DECLARE_GLOBAL_DATA_PTR;
42
wdenk8bde7f72003-06-27 21:31:46 +000043extern long _i386boot_start;
44extern long _i386boot_end;
wdenk2262cfe2002-11-18 00:14:45 +000045extern long _i386boot_romdata_start;
wdenk8bde7f72003-06-27 21:31:46 +000046extern long _i386boot_romdata_dest;
47extern long _i386boot_romdata_size;
48extern long _i386boot_bss_start;
49extern long _i386boot_bss_size;
wdenk2262cfe2002-11-18 00:14:45 +000050
wdenk8bde7f72003-06-27 21:31:46 +000051extern long _i386boot_realmode;
wdenk2262cfe2002-11-18 00:14:45 +000052extern long _i386boot_realmode_size;
wdenk8bde7f72003-06-27 21:31:46 +000053extern long _i386boot_bios;
54extern long _i386boot_bios_size;
wdenk2262cfe2002-11-18 00:14:45 +000055
56/* The symbols defined by the linker script becomes pointers
57 * which is somewhat inconveient ... */
58ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
59ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
60ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
61ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
62ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
63ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
64ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
65
66ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */
67ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
68ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */
69ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */
70
71
72const char version_string[] =
73 U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
74
75
76/*
77 * Begin and End of memory area for malloc(), and current "brk"
78 */
79static ulong mem_malloc_start = 0;
80static ulong mem_malloc_end = 0;
81static ulong mem_malloc_brk = 0;
82
83static int mem_malloc_init(void)
84{
wdenk2262cfe2002-11-18 00:14:45 +000085 /* start malloc area right after the stack */
wdenk8bde7f72003-06-27 21:31:46 +000086 mem_malloc_start = i386boot_bss_start +
wdenk2262cfe2002-11-18 00:14:45 +000087 i386boot_bss_size + CFG_STACK_SIZE;
88 mem_malloc_start = (mem_malloc_start+3)&~3;
wdenk8bde7f72003-06-27 21:31:46 +000089
wdenk2262cfe2002-11-18 00:14:45 +000090 /* Use all available RAM for malloc() */
91 mem_malloc_end = gd->ram_size;
wdenk8bde7f72003-06-27 21:31:46 +000092
wdenk2262cfe2002-11-18 00:14:45 +000093 mem_malloc_brk = mem_malloc_start;
94
95 return 0;
96}
97
98void *sbrk (ptrdiff_t increment)
99{
100 ulong old = mem_malloc_brk;
101 ulong new = old + increment;
102
103 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
104 return (NULL);
105 }
106 mem_malloc_brk = new;
107
108 return ((void *) old);
109}
110
111char *strmhz (char *buf, long hz)
112{
113 long l, n;
114 long m;
115
116 n = hz / 1000000L;
117 l = sprintf (buf, "%ld", n);
118 m = (hz % 1000000L) / 1000L;
119 if (m != 0)
120 sprintf (buf + l, ".%03ld", m);
121 return (buf);
122}
123
124/************************************************************************
125 * Init Utilities *
126 ************************************************************************
127 * Some of this code should be moved into the core functions,
128 * or dropped completely,
129 * but let's get it working (again) first...
130 */
wdenk2262cfe2002-11-18 00:14:45 +0000131static int init_baudrate (void)
132{
wdenk7a8e9bed2003-05-31 18:35:21 +0000133 char tmp[64]; /* long enough for environment variables */
134 int i = getenv_r("baudrate", tmp, 64);
wdenk2262cfe2002-11-18 00:14:45 +0000135
wdenk7a8e9bed2003-05-31 18:35:21 +0000136 gd->baudrate = (i != 0)
wdenk2262cfe2002-11-18 00:14:45 +0000137 ? (int) simple_strtoul (tmp, NULL, 10)
138 : CONFIG_BAUDRATE;
139
140 return (0);
141}
142
143static int display_banner (void)
144{
145
146 printf ("\n\n%s\n\n", version_string);
147 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
148 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
149 i386boot_start, i386boot_romdata_start-1,
150 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
151 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
wdenk8bde7f72003-06-27 21:31:46 +0000152 i386boot_bss_start+i386boot_bss_size,
wdenk2262cfe2002-11-18 00:14:45 +0000153 i386boot_bss_start+i386boot_bss_size+CFG_STACK_SIZE-1);
wdenk8bde7f72003-06-27 21:31:46 +0000154
wdenk2262cfe2002-11-18 00:14:45 +0000155
156 return (0);
157}
158
159/*
160 * WARNING: this code looks "cleaner" than the PowerPC version, but
161 * has the disadvantage that you either get nothing, or everything.
162 * On PowerPC, you might see "DRAM: " before the system hangs - which
163 * gives a simple yet clear indication which part of the
164 * initialization if failing.
165 */
166static int display_dram_config (void)
167{
wdenk2262cfe2002-11-18 00:14:45 +0000168 int i;
169
170 puts ("DRAM Configuration:\n");
171
172 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
173 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
174 print_size (gd->bd->bi_dram[i].size, "\n");
175 }
wdenk8bde7f72003-06-27 21:31:46 +0000176
wdenk2262cfe2002-11-18 00:14:45 +0000177 return (0);
178}
179
180static void display_flash_config (ulong size)
181{
182 puts ("Flash: ");
183 print_size (size, "\n");
184}
185
186
wdenk2262cfe2002-11-18 00:14:45 +0000187/*
188 * Breath some life into the board...
189 *
190 * Initialize an SMC for serial comms, and carry out some hardware
191 * tests.
192 *
193 * The first part of initialization is running from Flash memory;
194 * its main purpose is to initialize the RAM so that we
195 * can relocate the monitor code to RAM.
196 */
197
198/*
199 * All attempts to come up with a "common" initialization sequence
200 * that works for all boards and architectures failed: some of the
201 * requirements are just _too_ different. To get rid of the resulting
202 * mess of board dependend #ifdef'ed code we now make the whole
203 * initialization sequence configurable to the user.
204 *
205 * The requirements for any new initalization function is simple: it
206 * receives a pointer to the "global data" structure as it's only
207 * argument, and returns an integer return code, where 0 means
208 * "continue" and != 0 means "fatal error, hang the system".
209 */
210typedef int (init_fnc_t) (void);
211
212init_fnc_t *init_sequence[] = {
213 cpu_init, /* basic cpu dependent setup */
214 board_init, /* basic board dependent setup */
215 dram_init, /* configure available RAM banks */
216 mem_malloc_init, /* dependant on dram_init */
217 interrupt_init, /* set up exceptions */
wdenk8bde7f72003-06-27 21:31:46 +0000218 timer_init,
wdenk7a8e9bed2003-05-31 18:35:21 +0000219 serial_init,
wdenk2262cfe2002-11-18 00:14:45 +0000220 env_init, /* initialize environment */
221 init_baudrate, /* initialze baudrate settings */
222 serial_init, /* serial communications setup */
223 display_banner,
224 display_dram_config,
225
226 NULL,
227};
228
229gd_t *global_data;
230
231void start_i386boot (void)
232{
wdenk2262cfe2002-11-18 00:14:45 +0000233 char *s;
234 int i;
235 ulong size;
236 static gd_t gd_data;
237 static bd_t bd_data;
238 init_fnc_t **init_fnc_ptr;
wdenk8bde7f72003-06-27 21:31:46 +0000239
wdenk2262cfe2002-11-18 00:14:45 +0000240 show_boot_progress(0x21);
241
242 gd = global_data = &gd_data;
wdenk93f6a672004-07-01 20:28:03 +0000243 /* compiler optimization barrier needed for GCC >= 3.4 */
244 __asm__ __volatile__("": : :"memory");
wdenk8bde7f72003-06-27 21:31:46 +0000245
wdenk2262cfe2002-11-18 00:14:45 +0000246 memset (gd, 0, sizeof (gd_t));
247 gd->bd = &bd_data;
248 memset (gd->bd, 0, sizeof (bd_t));
249 show_boot_progress(0x22);
250
wdenk7a8e9bed2003-05-31 18:35:21 +0000251 gd->baudrate = CONFIG_BAUDRATE;
wdenk8bde7f72003-06-27 21:31:46 +0000252
wdenk2262cfe2002-11-18 00:14:45 +0000253 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
254 show_boot_progress(0xa130|i);
255
256 if ((*init_fnc_ptr)() != 0) {
257 hang ();
258 }
259 }
260 show_boot_progress(0x23);
261
262 /* configure available FLASH banks */
263 size = flash_init();
264 display_flash_config(size);
265 show_boot_progress(0x24);
266
267 show_boot_progress(0x25);
268
269 /* initialize environment */
270 env_relocate ();
271 show_boot_progress(0x26);
272
273
274 /* IP Address */
275 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
276
277 /* MAC Address */
278 {
279 int i;
280 ulong reg;
281 char *s, *e;
282 uchar tmp[64];
283
284 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
285 s = (i > 0) ? tmp : NULL;
286
287 for (reg = 0; reg < 6; ++reg) {
288 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
289 if (s)
290 s = (*e) ? e + 1 : e;
291 }
292 }
293
294#if defined(CONFIG_PCI)
295 /*
296 * Do pci configuration
297 */
298 pci_init();
299#endif
300
301 show_boot_progress(0x27);
302
303
304 devices_init ();
305
wdenk27b207f2003-07-24 23:38:38 +0000306 jumptable_init ();
wdenk8bde7f72003-06-27 21:31:46 +0000307
wdenk2262cfe2002-11-18 00:14:45 +0000308 /* Initialize the console (after the relocation and devices init) */
309 console_init_r();
wdenk2262cfe2002-11-18 00:14:45 +0000310
311#ifdef CONFIG_MISC_INIT_R
312 /* miscellaneous platform dependent initialisations */
313 misc_init_r();
314#endif
315
Jon Loeliger0c505db2007-06-11 19:03:03 -0500316#if ((CONFIG_COMMANDS & CFG_CMD_PCMCIA) || defined(CONFIG_CMD_PCMCIA))
317 && !((CONFIG_COMMANDS & CFG_CMD_IDE) || defined(CONFIG_CMD_IDE))
wdenk2262cfe2002-11-18 00:14:45 +0000318 WATCHDOG_RESET();
319 puts ("PCMCIA:");
320 pcmcia_init();
321#endif
322
Jon Loeliger0c505db2007-06-11 19:03:03 -0500323#if (CONFIG_COMMANDS & CFG_CMD_KGDB) || defined(CONFIG_CMD_KGDB)
wdenk2262cfe2002-11-18 00:14:45 +0000324 WATCHDOG_RESET();
325 puts("KGDB: ");
326 kgdb_init();
327#endif
328
329 /* enable exceptions */
wdenk7a8e9bed2003-05-31 18:35:21 +0000330 enable_interrupts();
wdenk2262cfe2002-11-18 00:14:45 +0000331 show_boot_progress(0x28);
332
333 /* Must happen after interrupts are initialized since
334 * an irq handler gets installed
335 */
wdenk42dfe7a2004-03-14 22:25:36 +0000336#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
wdenk2262cfe2002-11-18 00:14:45 +0000337 serial_buffered_init();
338#endif
wdenk8bde7f72003-06-27 21:31:46 +0000339
wdenk2262cfe2002-11-18 00:14:45 +0000340#ifdef CONFIG_STATUS_LED
341 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
342#endif
343
wdenk7a8e9bed2003-05-31 18:35:21 +0000344 udelay(20);
wdenk2262cfe2002-11-18 00:14:45 +0000345
346 set_timer (0);
347
348 /* Initialize from environment */
349 if ((s = getenv ("loadaddr")) != NULL) {
350 load_addr = simple_strtoul (s, NULL, 16);
351 }
Jon Loeliger0c505db2007-06-11 19:03:03 -0500352#if (CONFIG_COMMANDS & CFG_CMD_NET) || defined(CONFIG_CMD_NET)
wdenk2262cfe2002-11-18 00:14:45 +0000353 if ((s = getenv ("bootfile")) != NULL) {
354 copy_filename (BootFile, s, sizeof (BootFile));
355 }
356#endif /* CFG_CMD_NET */
357
358 WATCHDOG_RESET();
359
Jon Loeliger0c505db2007-06-11 19:03:03 -0500360#if (CONFIG_COMMANDS & CFG_CMD_IDE) || defined(CONFIG_CMD_IDE)
wdenk2262cfe2002-11-18 00:14:45 +0000361 WATCHDOG_RESET();
362 puts("IDE: ");
363 ide_init();
364#endif /* CFG_CMD_IDE */
365
Jon Loeliger0c505db2007-06-11 19:03:03 -0500366#if (CONFIG_COMMANDS & CFG_CMD_SCSI) || defined(CONFIG_CMD_SCSI)
wdenk2262cfe2002-11-18 00:14:45 +0000367 WATCHDOG_RESET();
368 puts("SCSI: ");
369 scsi_init();
370#endif
371
Jon Loeliger0c505db2007-06-11 19:03:03 -0500372#if (CONFIG_COMMANDS & CFG_CMD_DOC) || defined(CONFIG_CMD_DOC)
wdenk2262cfe2002-11-18 00:14:45 +0000373 WATCHDOG_RESET();
wdenk7a8e9bed2003-05-31 18:35:21 +0000374 puts("DOC: ");
wdenk2262cfe2002-11-18 00:14:45 +0000375 doc_init();
376#endif
377
Jon Loeliger0c505db2007-06-11 19:03:03 -0500378#if (CONFIG_COMMANDS & CFG_CMD_NET) || defined(CONFIG_CMD_NET)
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200379#if defined(CONFIG_NET_MULTI)
wdenk2262cfe2002-11-18 00:14:45 +0000380 WATCHDOG_RESET();
381 puts("Net: ");
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200382#endif
wdenk2262cfe2002-11-18 00:14:45 +0000383 eth_initialize(gd->bd);
384#endif
385
Jon Loeliger0c505db2007-06-11 19:03:03 -0500386#if ((CONFIG_COMMANDS & CFG_CMD_NET) || defined(CONFIG_CMD_NET)) && (0)
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200387 WATCHDOG_RESET();
388# ifdef DEBUG
389 puts ("Reset Ethernet PHY\n");
390# endif
391 reset_phy();
392#endif
393
wdenk2262cfe2002-11-18 00:14:45 +0000394#ifdef CONFIG_LAST_STAGE_INIT
395 WATCHDOG_RESET();
396 /*
397 * Some parts can be only initialized if all others (like
398 * Interrupts) are up and running (i.e. the PC-style ISA
399 * keyboard).
400 */
401 last_stage_init();
402#endif
403
404
wdenk2262cfe2002-11-18 00:14:45 +0000405#ifdef CONFIG_POST
406 post_run (NULL, POST_RAM | post_bootmode_get(0));
wdenk2262cfe2002-11-18 00:14:45 +0000407#endif
wdenk8bde7f72003-06-27 21:31:46 +0000408
409
wdenk2262cfe2002-11-18 00:14:45 +0000410 show_boot_progress(0x29);
wdenk8bde7f72003-06-27 21:31:46 +0000411
wdenk2262cfe2002-11-18 00:14:45 +0000412 /* main_loop() can return to retry autoboot, if so just run it again. */
413 for (;;) {
wdenk7a8e9bed2003-05-31 18:35:21 +0000414 main_loop();
wdenk2262cfe2002-11-18 00:14:45 +0000415 }
416
417 /* NOTREACHED - no way out of command loop except booting */
418}
419
420void hang (void)
421{
422 puts ("### ERROR ### Please RESET the board ###\n");
423 for (;;);
424}