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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
wdenk2262cfe2002-11-18 00:14:45 +0000111/************************************************************************
112 * Init Utilities *
113 ************************************************************************
114 * Some of this code should be moved into the core functions,
115 * or dropped completely,
116 * but let's get it working (again) first...
117 */
wdenk2262cfe2002-11-18 00:14:45 +0000118static int init_baudrate (void)
119{
wdenk7a8e9bed2003-05-31 18:35:21 +0000120 char tmp[64]; /* long enough for environment variables */
121 int i = getenv_r("baudrate", tmp, 64);
wdenk2262cfe2002-11-18 00:14:45 +0000122
wdenk7a8e9bed2003-05-31 18:35:21 +0000123 gd->baudrate = (i != 0)
wdenk2262cfe2002-11-18 00:14:45 +0000124 ? (int) simple_strtoul (tmp, NULL, 10)
125 : CONFIG_BAUDRATE;
126
127 return (0);
128}
129
130static int display_banner (void)
131{
132
133 printf ("\n\n%s\n\n", version_string);
134 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
135 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
136 i386boot_start, i386boot_romdata_start-1,
137 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
138 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
wdenk8bde7f72003-06-27 21:31:46 +0000139 i386boot_bss_start+i386boot_bss_size,
wdenk2262cfe2002-11-18 00:14:45 +0000140 i386boot_bss_start+i386boot_bss_size+CFG_STACK_SIZE-1);
wdenk8bde7f72003-06-27 21:31:46 +0000141
wdenk2262cfe2002-11-18 00:14:45 +0000142
143 return (0);
144}
145
146/*
147 * WARNING: this code looks "cleaner" than the PowerPC version, but
148 * has the disadvantage that you either get nothing, or everything.
149 * On PowerPC, you might see "DRAM: " before the system hangs - which
150 * gives a simple yet clear indication which part of the
151 * initialization if failing.
152 */
153static int display_dram_config (void)
154{
wdenk2262cfe2002-11-18 00:14:45 +0000155 int i;
156
157 puts ("DRAM Configuration:\n");
158
159 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
160 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
161 print_size (gd->bd->bi_dram[i].size, "\n");
162 }
wdenk8bde7f72003-06-27 21:31:46 +0000163
wdenk2262cfe2002-11-18 00:14:45 +0000164 return (0);
165}
166
167static void display_flash_config (ulong size)
168{
169 puts ("Flash: ");
170 print_size (size, "\n");
171}
172
173
wdenk2262cfe2002-11-18 00:14:45 +0000174/*
175 * Breath some life into the board...
176 *
177 * Initialize an SMC for serial comms, and carry out some hardware
178 * tests.
179 *
180 * The first part of initialization is running from Flash memory;
181 * its main purpose is to initialize the RAM so that we
182 * can relocate the monitor code to RAM.
183 */
184
185/*
186 * All attempts to come up with a "common" initialization sequence
187 * that works for all boards and architectures failed: some of the
188 * requirements are just _too_ different. To get rid of the resulting
189 * mess of board dependend #ifdef'ed code we now make the whole
190 * initialization sequence configurable to the user.
191 *
192 * The requirements for any new initalization function is simple: it
193 * receives a pointer to the "global data" structure as it's only
194 * argument, and returns an integer return code, where 0 means
195 * "continue" and != 0 means "fatal error, hang the system".
196 */
197typedef int (init_fnc_t) (void);
198
199init_fnc_t *init_sequence[] = {
200 cpu_init, /* basic cpu dependent setup */
201 board_init, /* basic board dependent setup */
202 dram_init, /* configure available RAM banks */
203 mem_malloc_init, /* dependant on dram_init */
204 interrupt_init, /* set up exceptions */
wdenk8bde7f72003-06-27 21:31:46 +0000205 timer_init,
wdenk7a8e9bed2003-05-31 18:35:21 +0000206 serial_init,
wdenk2262cfe2002-11-18 00:14:45 +0000207 env_init, /* initialize environment */
208 init_baudrate, /* initialze baudrate settings */
209 serial_init, /* serial communications setup */
210 display_banner,
211 display_dram_config,
212
213 NULL,
214};
215
216gd_t *global_data;
217
218void start_i386boot (void)
219{
wdenk2262cfe2002-11-18 00:14:45 +0000220 char *s;
221 int i;
222 ulong size;
223 static gd_t gd_data;
224 static bd_t bd_data;
225 init_fnc_t **init_fnc_ptr;
wdenk8bde7f72003-06-27 21:31:46 +0000226
wdenk2262cfe2002-11-18 00:14:45 +0000227 show_boot_progress(0x21);
228
229 gd = global_data = &gd_data;
wdenk93f6a672004-07-01 20:28:03 +0000230 /* compiler optimization barrier needed for GCC >= 3.4 */
231 __asm__ __volatile__("": : :"memory");
wdenk8bde7f72003-06-27 21:31:46 +0000232
wdenk2262cfe2002-11-18 00:14:45 +0000233 memset (gd, 0, sizeof (gd_t));
234 gd->bd = &bd_data;
235 memset (gd->bd, 0, sizeof (bd_t));
236 show_boot_progress(0x22);
237
wdenk7a8e9bed2003-05-31 18:35:21 +0000238 gd->baudrate = CONFIG_BAUDRATE;
wdenk8bde7f72003-06-27 21:31:46 +0000239
wdenk2262cfe2002-11-18 00:14:45 +0000240 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
241 show_boot_progress(0xa130|i);
242
243 if ((*init_fnc_ptr)() != 0) {
244 hang ();
245 }
246 }
247 show_boot_progress(0x23);
248
249 /* configure available FLASH banks */
250 size = flash_init();
251 display_flash_config(size);
252 show_boot_progress(0x24);
253
254 show_boot_progress(0x25);
255
256 /* initialize environment */
257 env_relocate ();
258 show_boot_progress(0x26);
259
260
261 /* IP Address */
262 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
263
264 /* MAC Address */
265 {
266 int i;
267 ulong reg;
268 char *s, *e;
269 uchar tmp[64];
270
271 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
272 s = (i > 0) ? tmp : NULL;
273
274 for (reg = 0; reg < 6; ++reg) {
275 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
276 if (s)
277 s = (*e) ? e + 1 : e;
278 }
279 }
280
281#if defined(CONFIG_PCI)
282 /*
283 * Do pci configuration
284 */
285 pci_init();
286#endif
287
288 show_boot_progress(0x27);
289
290
291 devices_init ();
292
wdenk27b207f2003-07-24 23:38:38 +0000293 jumptable_init ();
wdenk8bde7f72003-06-27 21:31:46 +0000294
wdenk2262cfe2002-11-18 00:14:45 +0000295 /* Initialize the console (after the relocation and devices init) */
296 console_init_r();
wdenk2262cfe2002-11-18 00:14:45 +0000297
298#ifdef CONFIG_MISC_INIT_R
299 /* miscellaneous platform dependent initialisations */
300 misc_init_r();
301#endif
302
Jon Loeliger67350562007-07-09 18:05:38 -0500303#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
wdenk2262cfe2002-11-18 00:14:45 +0000304 WATCHDOG_RESET();
305 puts ("PCMCIA:");
306 pcmcia_init();
307#endif
308
Jon Loeliger67350562007-07-09 18:05:38 -0500309#if defined(CONFIG_CMD_KGDB)
wdenk2262cfe2002-11-18 00:14:45 +0000310 WATCHDOG_RESET();
311 puts("KGDB: ");
312 kgdb_init();
313#endif
314
315 /* enable exceptions */
wdenk7a8e9bed2003-05-31 18:35:21 +0000316 enable_interrupts();
wdenk2262cfe2002-11-18 00:14:45 +0000317 show_boot_progress(0x28);
318
319 /* Must happen after interrupts are initialized since
320 * an irq handler gets installed
321 */
wdenk42dfe7a2004-03-14 22:25:36 +0000322#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
wdenk2262cfe2002-11-18 00:14:45 +0000323 serial_buffered_init();
324#endif
wdenk8bde7f72003-06-27 21:31:46 +0000325
wdenk2262cfe2002-11-18 00:14:45 +0000326#ifdef CONFIG_STATUS_LED
327 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
328#endif
329
wdenk7a8e9bed2003-05-31 18:35:21 +0000330 udelay(20);
wdenk2262cfe2002-11-18 00:14:45 +0000331
332 set_timer (0);
333
334 /* Initialize from environment */
335 if ((s = getenv ("loadaddr")) != NULL) {
336 load_addr = simple_strtoul (s, NULL, 16);
337 }
Jon Loeliger67350562007-07-09 18:05:38 -0500338#if defined(CONFIG_CMD_NET)
wdenk2262cfe2002-11-18 00:14:45 +0000339 if ((s = getenv ("bootfile")) != NULL) {
340 copy_filename (BootFile, s, sizeof (BootFile));
341 }
Jon Loeligerb3aff0c2007-07-10 11:19:50 -0500342#endif
wdenk2262cfe2002-11-18 00:14:45 +0000343
344 WATCHDOG_RESET();
345
Jon Loeliger67350562007-07-09 18:05:38 -0500346#if defined(CONFIG_CMD_IDE)
wdenk2262cfe2002-11-18 00:14:45 +0000347 WATCHDOG_RESET();
348 puts("IDE: ");
349 ide_init();
Jon Loeligerb3aff0c2007-07-10 11:19:50 -0500350#endif
wdenk2262cfe2002-11-18 00:14:45 +0000351
Jon Loeliger67350562007-07-09 18:05:38 -0500352#if defined(CONFIG_CMD_SCSI)
wdenk2262cfe2002-11-18 00:14:45 +0000353 WATCHDOG_RESET();
354 puts("SCSI: ");
355 scsi_init();
356#endif
357
Jon Loeliger67350562007-07-09 18:05:38 -0500358#if defined(CONFIG_CMD_DOC)
wdenk2262cfe2002-11-18 00:14:45 +0000359 WATCHDOG_RESET();
wdenk7a8e9bed2003-05-31 18:35:21 +0000360 puts("DOC: ");
wdenk2262cfe2002-11-18 00:14:45 +0000361 doc_init();
362#endif
363
Jon Loeliger67350562007-07-09 18:05:38 -0500364#if defined(CONFIG_CMD_NET)
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200365#if defined(CONFIG_NET_MULTI)
wdenk2262cfe2002-11-18 00:14:45 +0000366 WATCHDOG_RESET();
367 puts("Net: ");
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200368#endif
wdenk2262cfe2002-11-18 00:14:45 +0000369 eth_initialize(gd->bd);
370#endif
371
Jon Loeliger67350562007-07-09 18:05:38 -0500372#if ( defined(CONFIG_CMD_NET)) && (0)
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200373 WATCHDOG_RESET();
374# ifdef DEBUG
375 puts ("Reset Ethernet PHY\n");
376# endif
377 reset_phy();
378#endif
379
wdenk2262cfe2002-11-18 00:14:45 +0000380#ifdef CONFIG_LAST_STAGE_INIT
381 WATCHDOG_RESET();
382 /*
383 * Some parts can be only initialized if all others (like
384 * Interrupts) are up and running (i.e. the PC-style ISA
385 * keyboard).
386 */
387 last_stage_init();
388#endif
389
390
wdenk2262cfe2002-11-18 00:14:45 +0000391#ifdef CONFIG_POST
392 post_run (NULL, POST_RAM | post_bootmode_get(0));
wdenk2262cfe2002-11-18 00:14:45 +0000393#endif
wdenk8bde7f72003-06-27 21:31:46 +0000394
395
wdenk2262cfe2002-11-18 00:14:45 +0000396 show_boot_progress(0x29);
wdenk8bde7f72003-06-27 21:31:46 +0000397
wdenk2262cfe2002-11-18 00:14:45 +0000398 /* main_loop() can return to retry autoboot, if so just run it again. */
399 for (;;) {
wdenk7a8e9bed2003-05-31 18:35:21 +0000400 main_loop();
wdenk2262cfe2002-11-18 00:14:45 +0000401 }
402
403 /* NOTREACHED - no way out of command loop except booting */
404}
405
406void hang (void)
407{
408 puts ("### ERROR ### Please RESET the board ###\n");
409 for (;;);
410}
Mike Frysingera4986452008-04-13 19:42:19 -0400411
412unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
413{
414 /*
415 * Nios function pointers are address >> 1
416 */
417 return (entry >> 1) (argc, argv);
418}