1 /*
2 * (C) Copyright 2002
3 * Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
4 *
5 * (C) Copyright 2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 *
8 * (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 <stdio_dev.h>
35 #include <timestamp.h>
36 #include <version.h>
37 #include <malloc.h>
38 #include <net.h>
39 #include <ide.h>
40 #include <serial.h>
41 #include <asm/u-boot-i386.h>
42 #include <elf.h>
43
44 #ifdef CONFIG_BITBANGMII
45 #include <miiphy.h>
46 #endif
47
48 DECLARE_GLOBAL_DATA_PTR;
49
50 /* Exports from the Linker Script */
51 extern ulong _i386boot_text_start;
52 extern ulong _i386boot_rel_dyn_start;
53 extern ulong _i386boot_rel_dyn_end;
54 extern ulong _i386boot_bss_start;
55 extern ulong _i386boot_bss_size;
56
57 void ram_bootstrap (void *, ulong);
58
59 const char version_string[] =
60 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
61
62 /************************************************************************
63 * Init Utilities *
64 ************************************************************************
65 * Some of this code should be moved into the core functions,
66 * or dropped completely,
67 * but let's get it working (again) first...
68 */
init_baudrate(void)69 static int init_baudrate (void)
70 {
71 char tmp[64]; /* long enough for environment variables */
72 int i = getenv_r("baudrate", tmp, 64);
73
74 gd->baudrate = (i != 0)
75 ? (int) simple_strtoul (tmp, NULL, 10)
76 : CONFIG_BAUDRATE;
77
78 return (0);
79 }
80
display_banner(void)81 static int display_banner (void)
82 {
83
84 printf ("\n\n%s\n\n", version_string);
85 /*
86 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
87 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
88 i386boot_start, i386boot_romdata_start-1,
89 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
90 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
91 i386boot_bss_start+i386boot_bss_size,
92 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
93
94 */
95
96 return (0);
97 }
98
99 /*
100 * WARNING: this code looks "cleaner" than the PowerPC version, but
101 * has the disadvantage that you either get nothing, or everything.
102 * On PowerPC, you might see "DRAM: " before the system hangs - which
103 * gives a simple yet clear indication which part of the
104 * initialization if failing.
105 */
display_dram_config(void)106 static int display_dram_config (void)
107 {
108 int i;
109
110 puts ("DRAM Configuration:\n");
111
112 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
113 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
114 print_size (gd->bd->bi_dram[i].size, "\n");
115 }
116
117 return (0);
118 }
119
display_flash_config(ulong size)120 static void display_flash_config (ulong size)
121 {
122 puts ("Flash: ");
123 print_size (size, "\n");
124 }
125
126 /*
127 * Breath some life into the board...
128 *
129 * Initialize an SMC for serial comms, and carry out some hardware
130 * tests.
131 *
132 * The first part of initialization is running from Flash memory;
133 * its main purpose is to initialize the RAM so that we
134 * can relocate the monitor code to RAM.
135 */
136
137
138 /*
139 * All attempts to come up with a "common" initialization sequence
140 * that works for all boards and architectures failed: some of the
141 * requirements are just _too_ different. To get rid of the resulting
142 * mess of board dependend #ifdef'ed code we now make the whole
143 * initialization sequence configurable to the user.
144 *
145 * The requirements for any new initalization function is simple: it
146 * receives a pointer to the "global data" structure as it's only
147 * argument, and returns an integer return code, where 0 means
148 * "continue" and != 0 means "fatal error, hang the system".
149 */
150 typedef int (init_fnc_t) (void);
151
152 init_fnc_t *init_sequence[] = {
153 cpu_init_r, /* basic cpu dependent setup */
154 board_early_init_r, /* basic board dependent setup */
155 dram_init, /* configure available RAM banks */
156 interrupt_init, /* set up exceptions */
157 timer_init,
158 env_init, /* initialize environment */
159 init_baudrate, /* initialze baudrate settings */
160 serial_init, /* serial communications setup */
161 display_banner,
162 display_dram_config,
163
164 NULL,
165 };
166
167 static gd_t gd_data;
168 gd_t *gd;
169
170 /*
171 * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
172 */
board_init_f(ulong stack_limit)173 void board_init_f (ulong stack_limit)
174 {
175 void *text_start = &_i386boot_text_start;
176 void *u_boot_cmd_end = &__u_boot_cmd_end;
177 Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start;
178 Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end;
179 void *bss_start = &_i386boot_bss_start;
180 ulong bss_size = (ulong)&_i386boot_bss_size;
181
182 ulong uboot_size;
183 void *dest_addr;
184 ulong rel_offset;
185 Elf32_Rel *re;
186
187 void (*start_func)(void *, ulong);
188
189 uboot_size = (ulong)u_boot_cmd_end - (ulong)text_start;
190 dest_addr = (void *)stack_limit - (uboot_size + (ulong)bss_size);
191 rel_offset = text_start - dest_addr;
192 start_func = ram_bootstrap - rel_offset;
193
194 /* First stage CPU initialization */
195 if (cpu_init_f() != 0)
196 hang();
197
198 /* First stage Board initialization */
199 if (board_early_init_f() != 0)
200 hang();
201
202 /* Copy U-Boot into RAM */
203 memcpy(dest_addr, text_start, uboot_size);
204
205 /* Clear BSS */
206 memset(bss_start - rel_offset, 0, bss_size);
207
208 /* Perform relocation adjustments */
209 for (re = rel_dyn_start; re < rel_dyn_end; re++)
210 {
211 if (re->r_offset >= TEXT_BASE)
212 if (*(ulong *)re->r_offset >= TEXT_BASE)
213 *(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
214 }
215
216 /* Enter the relocated U-Boot! */
217 start_func(dest_addr, rel_offset);
218 /* NOTREACHED - board_init_f() does not return */
219 while(1);
220 }
221
222 /*
223 * We cannot initialize gd_data in board_init_f() because we would be
224 * attempting to write to flash (I have even tried using manual relocation
225 * adjustments on pointers but it just won't work) and board_init_r() does
226 * not have enough arguments to allow us to pass the relocation offset
227 * straight up. This bootstrap function (which runs in RAM) is used to
228 * setup gd_data in order to pass the relocation offset to the rest of
229 * U-Boot.
230 *
231 * TODO: The compiler optimization barrier is intended to stop GCC from
232 * optimizing this function into board_init_f(). It seems to work without
233 * it, but I've left it in to be sure. I think also that the barrier in
234 * board_init_r() is no longer needed, but left it in 'just in case'
235 */
ram_bootstrap(void * dest_addr,ulong rel_offset)236 void ram_bootstrap (void *dest_addr, ulong rel_offset)
237 {
238 /* compiler optimization barrier needed for GCC >= 3.4 */
239 __asm__ __volatile__("": : :"memory");
240
241 /* tell others: relocation done */
242 gd_data.reloc_off = rel_offset;
243 gd_data.flags |= GD_FLG_RELOC;
244
245 board_init_r(&gd_data, (ulong)dest_addr);
246 }
247
board_init_r(gd_t * id,ulong dest_addr)248 void board_init_r(gd_t *id, ulong dest_addr)
249 {
250 char *s;
251 int i;
252 ulong size;
253 static bd_t bd_data;
254 init_fnc_t **init_fnc_ptr;
255
256 show_boot_progress(0x21);
257
258 gd = id;
259 /* compiler optimization barrier needed for GCC >= 3.4 */
260 __asm__ __volatile__("": : :"memory");
261
262 gd->bd = &bd_data;
263 memset (gd->bd, 0, sizeof (bd_t));
264 show_boot_progress(0x22);
265
266 gd->baudrate = CONFIG_BAUDRATE;
267
268 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
269 CONFIG_SYS_MALLOC_LEN);
270
271 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
272 show_boot_progress(0xa130|i);
273
274 if ((*init_fnc_ptr)() != 0) {
275 hang ();
276 }
277 }
278 show_boot_progress(0x23);
279
280 #ifdef CONFIG_SERIAL_MULTI
281 serial_initialize();
282 #endif
283 /* configure available FLASH banks */
284 size = flash_init();
285 display_flash_config(size);
286 show_boot_progress(0x24);
287
288 show_boot_progress(0x25);
289
290 /* initialize environment */
291 env_relocate ();
292 show_boot_progress(0x26);
293
294
295 #ifdef CONFIG_CMD_NET
296 /* IP Address */
297 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
298 #endif
299
300 #if defined(CONFIG_PCI)
301 /*
302 * Do pci configuration
303 */
304 pci_init();
305 #endif
306
307 show_boot_progress(0x27);
308
309
310 stdio_init ();
311
312 jumptable_init ();
313
314 /* Initialize the console (after the relocation and devices init) */
315 console_init_r();
316
317 #ifdef CONFIG_MISC_INIT_R
318 /* miscellaneous platform dependent initialisations */
319 misc_init_r();
320 #endif
321
322 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
323 WATCHDOG_RESET();
324 puts ("PCMCIA:");
325 pcmcia_init();
326 #endif
327
328 #if defined(CONFIG_CMD_KGDB)
329 WATCHDOG_RESET();
330 puts("KGDB: ");
331 kgdb_init();
332 #endif
333
334 /* enable exceptions */
335 enable_interrupts();
336 show_boot_progress(0x28);
337
338 /* Must happen after interrupts are initialized since
339 * an irq handler gets installed
340 */
341 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
342 serial_buffered_init();
343 #endif
344
345 #ifdef CONFIG_STATUS_LED
346 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
347 #endif
348
349 udelay(20);
350
351 set_timer (0);
352
353 /* Initialize from environment */
354 if ((s = getenv ("loadaddr")) != NULL) {
355 load_addr = simple_strtoul (s, NULL, 16);
356 }
357 #if defined(CONFIG_CMD_NET)
358 if ((s = getenv ("bootfile")) != NULL) {
359 copy_filename (BootFile, s, sizeof (BootFile));
360 }
361 #endif
362
363 WATCHDOG_RESET();
364
365 #if defined(CONFIG_CMD_IDE)
366 WATCHDOG_RESET();
367 puts("IDE: ");
368 ide_init();
369 #endif
370
371 #if defined(CONFIG_CMD_SCSI)
372 WATCHDOG_RESET();
373 puts("SCSI: ");
374 scsi_init();
375 #endif
376
377 #if defined(CONFIG_CMD_DOC)
378 WATCHDOG_RESET();
379 puts("DOC: ");
380 doc_init();
381 #endif
382
383 #ifdef CONFIG_BITBANGMII
384 bb_miiphy_init();
385 #endif
386 #if defined(CONFIG_CMD_NET)
387 #if defined(CONFIG_NET_MULTI)
388 WATCHDOG_RESET();
389 puts("Net: ");
390 #endif
391 eth_initialize(gd->bd);
392 #endif
393
394 #if ( defined(CONFIG_CMD_NET)) && (0)
395 WATCHDOG_RESET();
396 # ifdef DEBUG
397 puts ("Reset Ethernet PHY\n");
398 # endif
399 reset_phy();
400 #endif
401
402 #ifdef CONFIG_LAST_STAGE_INIT
403 WATCHDOG_RESET();
404 /*
405 * Some parts can be only initialized if all others (like
406 * Interrupts) are up and running (i.e. the PC-style ISA
407 * keyboard).
408 */
409 last_stage_init();
410 #endif
411
412
413 #ifdef CONFIG_POST
414 post_run (NULL, POST_RAM | post_bootmode_get(0));
415 #endif
416
417
418 show_boot_progress(0x29);
419
420 /* main_loop() can return to retry autoboot, if so just run it again. */
421 for (;;) {
422 main_loop();
423 }
424
425 /* NOTREACHED - no way out of command loop except booting */
426 }
427
hang(void)428 void hang (void)
429 {
430 puts ("### ERROR ### Please RESET the board ###\n");
431 for (;;);
432 }
433
do_go_exec(ulong (* entry)(int,char * []),int argc,char * argv[])434 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
435 {
436 /*
437 * x86 does not use a dedicated register to pass the pointer
438 * to the global_data
439 */
440 argv[-1] = (char *)gd;
441
442 return (entry) (argc, argv);
443 }
444
445 void setup_pcat_compatibility(void)
446 __attribute__((weak, alias("__setup_pcat_compatibility")));
447
__setup_pcat_compatibility(void)448 void __setup_pcat_compatibility(void)
449 {
450 }
451