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wdenk591dda52002-11-18 00:14:45 +00001/*
2 * (C) Copyright 2002
3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
wdenk57b2d802003-06-27 21:31:46 +00004 *
wdenk591dda52002-11-18 00:14:45 +00005 * (C) Copyright 2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
wdenk57b2d802003-06-27 21:31:46 +00007 *
wdenk591dda52002-11-18 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>
Peter Tyser62948502008-11-03 09:30:59 -060035#include <timestamp.h>
wdenk591dda52002-11-18 00:14:45 +000036#include <version.h>
37#include <malloc.h>
wdenk591dda52002-11-18 00:14:45 +000038#include <net.h>
39#include <ide.h>
wdenkabda5ca2003-05-31 18:35:21 +000040#include <asm/u-boot-i386.h>
wdenk591dda52002-11-18 00:14:45 +000041
Wolfgang Denk6405a152006-03-31 18:32:53 +020042DECLARE_GLOBAL_DATA_PTR;
43
wdenk57b2d802003-06-27 21:31:46 +000044extern long _i386boot_start;
45extern long _i386boot_end;
wdenk591dda52002-11-18 00:14:45 +000046extern long _i386boot_romdata_start;
wdenk57b2d802003-06-27 21:31:46 +000047extern long _i386boot_romdata_dest;
48extern long _i386boot_romdata_size;
49extern long _i386boot_bss_start;
50extern long _i386boot_bss_size;
wdenk591dda52002-11-18 00:14:45 +000051
wdenk57b2d802003-06-27 21:31:46 +000052extern long _i386boot_realmode;
wdenk591dda52002-11-18 00:14:45 +000053extern long _i386boot_realmode_size;
wdenk57b2d802003-06-27 21:31:46 +000054extern long _i386boot_bios;
55extern long _i386boot_bios_size;
wdenk591dda52002-11-18 00:14:45 +000056
57/* The symbols defined by the linker script becomes pointers
58 * which is somewhat inconveient ... */
59ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
60ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
61ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
62ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
63ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
64ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
65ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
66
67ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */
68ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
69ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */
70ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */
71
72
73const char version_string[] =
Peter Tyser62948502008-11-03 09:30:59 -060074 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
wdenk591dda52002-11-18 00:14:45 +000075
76
77/*
78 * Begin and End of memory area for malloc(), and current "brk"
79 */
80static ulong mem_malloc_start = 0;
81static ulong mem_malloc_end = 0;
82static ulong mem_malloc_brk = 0;
83
84static int mem_malloc_init(void)
85{
wdenk591dda52002-11-18 00:14:45 +000086 /* start malloc area right after the stack */
wdenk57b2d802003-06-27 21:31:46 +000087 mem_malloc_start = i386boot_bss_start +
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020088 i386boot_bss_size + CONFIG_SYS_STACK_SIZE;
wdenk591dda52002-11-18 00:14:45 +000089 mem_malloc_start = (mem_malloc_start+3)&~3;
wdenk57b2d802003-06-27 21:31:46 +000090
wdenk591dda52002-11-18 00:14:45 +000091 /* Use all available RAM for malloc() */
92 mem_malloc_end = gd->ram_size;
wdenk57b2d802003-06-27 21:31:46 +000093
wdenk591dda52002-11-18 00:14:45 +000094 mem_malloc_brk = mem_malloc_start;
95
96 return 0;
97}
98
99void *sbrk (ptrdiff_t increment)
100{
101 ulong old = mem_malloc_brk;
102 ulong new = old + increment;
103
104 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
105 return (NULL);
106 }
107 mem_malloc_brk = new;
108
109 return ((void *) old);
110}
111
wdenk591dda52002-11-18 00:14:45 +0000112/************************************************************************
113 * Init Utilities *
114 ************************************************************************
115 * Some of this code should be moved into the core functions,
116 * or dropped completely,
117 * but let's get it working (again) first...
118 */
wdenk591dda52002-11-18 00:14:45 +0000119static int init_baudrate (void)
120{
wdenkabda5ca2003-05-31 18:35:21 +0000121 char tmp[64]; /* long enough for environment variables */
122 int i = getenv_r("baudrate", tmp, 64);
wdenk591dda52002-11-18 00:14:45 +0000123
wdenkabda5ca2003-05-31 18:35:21 +0000124 gd->baudrate = (i != 0)
wdenk591dda52002-11-18 00:14:45 +0000125 ? (int) simple_strtoul (tmp, NULL, 10)
126 : CONFIG_BAUDRATE;
127
128 return (0);
129}
130
131static int display_banner (void)
132{
133
134 printf ("\n\n%s\n\n", version_string);
135 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
136 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
137 i386boot_start, i386boot_romdata_start-1,
138 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
139 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
wdenk57b2d802003-06-27 21:31:46 +0000140 i386boot_bss_start+i386boot_bss_size,
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200141 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
wdenk57b2d802003-06-27 21:31:46 +0000142
wdenk591dda52002-11-18 00:14:45 +0000143
144 return (0);
145}
146
147/*
148 * WARNING: this code looks "cleaner" than the PowerPC version, but
149 * has the disadvantage that you either get nothing, or everything.
150 * On PowerPC, you might see "DRAM: " before the system hangs - which
151 * gives a simple yet clear indication which part of the
152 * initialization if failing.
153 */
154static int display_dram_config (void)
155{
wdenk591dda52002-11-18 00:14:45 +0000156 int i;
157
158 puts ("DRAM Configuration:\n");
159
160 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
161 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
162 print_size (gd->bd->bi_dram[i].size, "\n");
163 }
wdenk57b2d802003-06-27 21:31:46 +0000164
wdenk591dda52002-11-18 00:14:45 +0000165 return (0);
166}
167
168static void display_flash_config (ulong size)
169{
170 puts ("Flash: ");
171 print_size (size, "\n");
172}
173
174
wdenk591dda52002-11-18 00:14:45 +0000175/*
176 * Breath some life into the board...
177 *
178 * Initialize an SMC for serial comms, and carry out some hardware
179 * tests.
180 *
181 * The first part of initialization is running from Flash memory;
182 * its main purpose is to initialize the RAM so that we
183 * can relocate the monitor code to RAM.
184 */
185
186/*
187 * All attempts to come up with a "common" initialization sequence
188 * that works for all boards and architectures failed: some of the
189 * requirements are just _too_ different. To get rid of the resulting
190 * mess of board dependend #ifdef'ed code we now make the whole
191 * initialization sequence configurable to the user.
192 *
193 * The requirements for any new initalization function is simple: it
194 * receives a pointer to the "global data" structure as it's only
195 * argument, and returns an integer return code, where 0 means
196 * "continue" and != 0 means "fatal error, hang the system".
197 */
198typedef int (init_fnc_t) (void);
199
200init_fnc_t *init_sequence[] = {
201 cpu_init, /* basic cpu dependent setup */
202 board_init, /* basic board dependent setup */
203 dram_init, /* configure available RAM banks */
204 mem_malloc_init, /* dependant on dram_init */
205 interrupt_init, /* set up exceptions */
wdenk57b2d802003-06-27 21:31:46 +0000206 timer_init,
wdenkabda5ca2003-05-31 18:35:21 +0000207 serial_init,
wdenk591dda52002-11-18 00:14:45 +0000208 env_init, /* initialize environment */
209 init_baudrate, /* initialze baudrate settings */
210 serial_init, /* serial communications setup */
211 display_banner,
212 display_dram_config,
213
214 NULL,
215};
216
Graeme Russ2fe2a972008-09-07 07:08:42 +1000217gd_t *gd;
wdenk591dda52002-11-18 00:14:45 +0000218
219void start_i386boot (void)
220{
wdenk591dda52002-11-18 00:14:45 +0000221 char *s;
222 int i;
223 ulong size;
224 static gd_t gd_data;
225 static bd_t bd_data;
226 init_fnc_t **init_fnc_ptr;
wdenk57b2d802003-06-27 21:31:46 +0000227
wdenk591dda52002-11-18 00:14:45 +0000228 show_boot_progress(0x21);
229
Graeme Russ2fe2a972008-09-07 07:08:42 +1000230 gd = &gd_data;
wdenk3337af42004-07-01 20:28:03 +0000231 /* compiler optimization barrier needed for GCC >= 3.4 */
232 __asm__ __volatile__("": : :"memory");
wdenk57b2d802003-06-27 21:31:46 +0000233
wdenk591dda52002-11-18 00:14:45 +0000234 memset (gd, 0, sizeof (gd_t));
235 gd->bd = &bd_data;
236 memset (gd->bd, 0, sizeof (bd_t));
237 show_boot_progress(0x22);
238
wdenkabda5ca2003-05-31 18:35:21 +0000239 gd->baudrate = CONFIG_BAUDRATE;
wdenk57b2d802003-06-27 21:31:46 +0000240
wdenk591dda52002-11-18 00:14:45 +0000241 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
242 show_boot_progress(0xa130|i);
243
244 if ((*init_fnc_ptr)() != 0) {
245 hang ();
246 }
247 }
248 show_boot_progress(0x23);
249
250 /* configure available FLASH banks */
251 size = flash_init();
252 display_flash_config(size);
253 show_boot_progress(0x24);
254
255 show_boot_progress(0x25);
256
257 /* initialize environment */
258 env_relocate ();
259 show_boot_progress(0x26);
260
261
262 /* IP Address */
263 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
264
265 /* MAC Address */
266 {
267 int i;
268 ulong reg;
269 char *s, *e;
Graeme Russ2fe2a972008-09-07 07:08:42 +1000270 char tmp[64];
wdenk591dda52002-11-18 00:14:45 +0000271
272 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
273 s = (i > 0) ? tmp : NULL;
274
275 for (reg = 0; reg < 6; ++reg) {
276 bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
277 if (s)
278 s = (*e) ? e + 1 : e;
279 }
280 }
281
282#if defined(CONFIG_PCI)
283 /*
284 * Do pci configuration
285 */
286 pci_init();
287#endif
288
289 show_boot_progress(0x27);
290
291
292 devices_init ();
293
wdenk874ac262003-07-24 23:38:38 +0000294 jumptable_init ();
wdenk57b2d802003-06-27 21:31:46 +0000295
wdenk591dda52002-11-18 00:14:45 +0000296 /* Initialize the console (after the relocation and devices init) */
297 console_init_r();
wdenk591dda52002-11-18 00:14:45 +0000298
299#ifdef CONFIG_MISC_INIT_R
300 /* miscellaneous platform dependent initialisations */
301 misc_init_r();
302#endif
303
Jon Loeliger12077972007-07-09 18:05:38 -0500304#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
wdenk591dda52002-11-18 00:14:45 +0000305 WATCHDOG_RESET();
306 puts ("PCMCIA:");
307 pcmcia_init();
308#endif
309
Jon Loeliger12077972007-07-09 18:05:38 -0500310#if defined(CONFIG_CMD_KGDB)
wdenk591dda52002-11-18 00:14:45 +0000311 WATCHDOG_RESET();
312 puts("KGDB: ");
313 kgdb_init();
314#endif
315
316 /* enable exceptions */
wdenkabda5ca2003-05-31 18:35:21 +0000317 enable_interrupts();
wdenk591dda52002-11-18 00:14:45 +0000318 show_boot_progress(0x28);
319
320 /* Must happen after interrupts are initialized since
321 * an irq handler gets installed
322 */
wdenkc35ba4e2004-03-14 22:25:36 +0000323#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
wdenk591dda52002-11-18 00:14:45 +0000324 serial_buffered_init();
325#endif
wdenk57b2d802003-06-27 21:31:46 +0000326
wdenk591dda52002-11-18 00:14:45 +0000327#ifdef CONFIG_STATUS_LED
328 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
329#endif
330
wdenkabda5ca2003-05-31 18:35:21 +0000331 udelay(20);
wdenk591dda52002-11-18 00:14:45 +0000332
333 set_timer (0);
334
335 /* Initialize from environment */
336 if ((s = getenv ("loadaddr")) != NULL) {
337 load_addr = simple_strtoul (s, NULL, 16);
338 }
Jon Loeliger12077972007-07-09 18:05:38 -0500339#if defined(CONFIG_CMD_NET)
wdenk591dda52002-11-18 00:14:45 +0000340 if ((s = getenv ("bootfile")) != NULL) {
341 copy_filename (BootFile, s, sizeof (BootFile));
342 }
Jon Loeliger1670a5b2007-07-10 11:19:50 -0500343#endif
wdenk591dda52002-11-18 00:14:45 +0000344
345 WATCHDOG_RESET();
346
Jon Loeliger12077972007-07-09 18:05:38 -0500347#if defined(CONFIG_CMD_IDE)
wdenk591dda52002-11-18 00:14:45 +0000348 WATCHDOG_RESET();
349 puts("IDE: ");
350 ide_init();
Jon Loeliger1670a5b2007-07-10 11:19:50 -0500351#endif
wdenk591dda52002-11-18 00:14:45 +0000352
Jon Loeliger12077972007-07-09 18:05:38 -0500353#if defined(CONFIG_CMD_SCSI)
wdenk591dda52002-11-18 00:14:45 +0000354 WATCHDOG_RESET();
355 puts("SCSI: ");
356 scsi_init();
357#endif
358
Jon Loeliger12077972007-07-09 18:05:38 -0500359#if defined(CONFIG_CMD_DOC)
wdenk591dda52002-11-18 00:14:45 +0000360 WATCHDOG_RESET();
wdenkabda5ca2003-05-31 18:35:21 +0000361 puts("DOC: ");
wdenk591dda52002-11-18 00:14:45 +0000362 doc_init();
363#endif
364
Jon Loeliger12077972007-07-09 18:05:38 -0500365#if defined(CONFIG_CMD_NET)
Marian Balakowiczaab8c492005-10-28 22:30:33 +0200366#if defined(CONFIG_NET_MULTI)
wdenk591dda52002-11-18 00:14:45 +0000367 WATCHDOG_RESET();
368 puts("Net: ");
Marian Balakowiczaab8c492005-10-28 22:30:33 +0200369#endif
wdenk591dda52002-11-18 00:14:45 +0000370 eth_initialize(gd->bd);
371#endif
372
Jon Loeliger12077972007-07-09 18:05:38 -0500373#if ( defined(CONFIG_CMD_NET)) && (0)
Marian Balakowiczaab8c492005-10-28 22:30:33 +0200374 WATCHDOG_RESET();
375# ifdef DEBUG
376 puts ("Reset Ethernet PHY\n");
377# endif
378 reset_phy();
379#endif
380
wdenk591dda52002-11-18 00:14:45 +0000381#ifdef CONFIG_LAST_STAGE_INIT
382 WATCHDOG_RESET();
383 /*
384 * Some parts can be only initialized if all others (like
385 * Interrupts) are up and running (i.e. the PC-style ISA
386 * keyboard).
387 */
388 last_stage_init();
389#endif
390
391
wdenk591dda52002-11-18 00:14:45 +0000392#ifdef CONFIG_POST
393 post_run (NULL, POST_RAM | post_bootmode_get(0));
wdenk591dda52002-11-18 00:14:45 +0000394#endif
wdenk57b2d802003-06-27 21:31:46 +0000395
396
wdenk591dda52002-11-18 00:14:45 +0000397 show_boot_progress(0x29);
wdenk57b2d802003-06-27 21:31:46 +0000398
wdenk591dda52002-11-18 00:14:45 +0000399 /* main_loop() can return to retry autoboot, if so just run it again. */
400 for (;;) {
wdenkabda5ca2003-05-31 18:35:21 +0000401 main_loop();
wdenk591dda52002-11-18 00:14:45 +0000402 }
403
404 /* NOTREACHED - no way out of command loop except booting */
405}
406
407void hang (void)
408{
409 puts ("### ERROR ### Please RESET the board ###\n");
410 for (;;);
411}
Mike Frysinger0870e472008-04-13 19:42:19 -0400412
413unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
414{
415 /*
Graeme Russ2fe2a972008-09-07 07:08:42 +1000416 * TODO: Test this function - changed to fix compiler error.
417 * Original code was:
418 * return (entry >> 1) (argc, argv);
419 * with a comment about Nios function pointers are address >> 1
Mike Frysinger0870e472008-04-13 19:42:19 -0400420 */
Graeme Russ2fe2a972008-09-07 07:08:42 +1000421 return (entry) (argc, argv);
Mike Frysinger0870e472008-04-13 19:42:19 -0400422}