board.c 10.1 KB
Newer Older
Alexander Yurtsev's avatar
Alexander Yurtsev committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429
/*
 * (C) Copyright 2002
 * Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
 *
 * (C) Copyright 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <stdio_dev.h>
#include <timestamp.h>
#include <version.h>
#include <malloc.h>
#include <net.h>
#include <ide.h>
#include <asm/u-boot-i386.h>
#include <elf.h>

#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

/* Exports from the Linker Script */
extern ulong _i386boot_text_start;
extern ulong _i386boot_rel_dyn_start;
extern ulong _i386boot_rel_dyn_end;
extern ulong _i386boot_bss_start;
extern ulong _i386boot_bss_size;
void ram_bootstrap (void *);
const char version_string[] =
	U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";

/************************************************************************
 * Init Utilities							*
 ************************************************************************
 * Some of this code should be moved into the core functions,
 * or dropped completely,
 * but let's get it working (again) first...
 */
static int init_baudrate (void)
{
	char tmp[64];	/* long enough for environment variables */
	int i = getenv_r("baudrate", tmp, 64);

	gd->baudrate = (i != 0)
			? (int) simple_strtoul (tmp, NULL, 10)
			: CONFIG_BAUDRATE;

	return (0);
}

static int display_banner (void)
{

	printf ("\n\n%s\n\n", version_string);
/*
	printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
		"        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
		i386boot_start, i386boot_romdata_start-1,
		i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
		i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
		i386boot_bss_start+i386boot_bss_size,
		i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);

*/

	return (0);
}

/*
 * WARNING: this code looks "cleaner" than the PowerPC version, but
 * has the disadvantage that you either get nothing, or everything.
 * On PowerPC, you might see "DRAM: " before the system hangs - which
 * gives a simple yet clear indication which part of the
 * initialization if failing.
 */
static int display_dram_config (void)
{
	int i;

	puts ("DRAM Configuration:\n");

	for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
		printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
		print_size (gd->bd->bi_dram[i].size, "\n");
	}

	return (0);
}

static void display_flash_config (ulong size)
{
	puts ("Flash: ");
	print_size (size, "\n");
}

/*
 * Breath some life into the board...
 *
 * Initialize an SMC for serial comms, and carry out some hardware
 * tests.
 *
 * The first part of initialization is running from Flash memory;
 * its main purpose is to initialize the RAM so that we
 * can relocate the monitor code to RAM.
 */


/*
 * All attempts to come up with a "common" initialization sequence
 * that works for all boards and architectures failed: some of the
 * requirements are just _too_ different. To get rid of the resulting
 * mess of board dependend #ifdef'ed code we now make the whole
 * initialization sequence configurable to the user.
 *
 * The requirements for any new initalization function is simple: it
 * receives a pointer to the "global data" structure as it's only
 * argument, and returns an integer return code, where 0 means
 * "continue" and != 0 means "fatal error, hang the system".
 */
typedef int (init_fnc_t) (void);

init_fnc_t *init_sequence[] = {
	serial_init,
	cpu_init_r,		/* basic cpu dependent setup */
	board_early_init_r,	/* basic board dependent setup */
	dram_init,		/* configure available RAM banks */
	interrupt_init,		/* set up exceptions */
	timer_init,
	env_init,		/* initialize environment */
	init_baudrate,		/* initialze baudrate settings */
	serial_init,		/* serial communications setup */
	display_banner,
	display_dram_config,

	NULL,
};

gd_t *gd;

/*
 * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
 */
void board_init_f (ulong stack_limit)
{
	void *text_start = &_i386boot_text_start;
	void *u_boot_cmd_end = &__u_boot_cmd_end;
	Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start;
	Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end;
	void *bss_start = &_i386boot_bss_start;
	void *bss_size = &_i386boot_bss_size;

	size_t uboot_size;
	void *ram_start;
	ulong rel_offset;
	Elf32_Rel *re;

	void (*start_func)(void *);

	/* compiler optimization barrier needed for GCC >= 3.4 */
	__asm__ __volatile__("": : :"memory");

	uboot_size = (size_t)u_boot_cmd_end - (size_t)text_start;
	ram_start  = (void *)stack_limit - (uboot_size + (ulong)bss_size);
	rel_offset = text_start - ram_start;
	start_func = ram_bootstrap - rel_offset;

	/* First stage CPU initialization */
	if (cpu_init_f() != 0)
		hang();

	/* First stage Board initialization */
	if (board_early_init_f() != 0)
		hang();

	/* Copy U-Boot into RAM */
	memcpy(ram_start, text_start, (size_t)uboot_size);

	/* Clear BSS */
	memset(bss_start - rel_offset,	0, (size_t)bss_size);

	/* Perform relocation adjustments */
	for (re = rel_dyn_start; re < rel_dyn_end; re++)
	{
		if (re->r_offset >= TEXT_BASE)
			if (*(ulong *)re->r_offset >= TEXT_BASE)
				*(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
	}

	start_func(ram_start);

	/* NOTREACHED - relocate_code() does not return */
	while(1);
}

/*
 * All attempts to jump straight from board_init_f() to board_init_r()
 * have failed, hence this special 'bootstrap' function.
 */
void ram_bootstrap (void *ram_start)
{
	static gd_t gd_data;

	/* compiler optimization barrier needed for GCC >= 3.4 */
	__asm__ __volatile__("": : :"memory");

	board_init_r(&gd_data, (ulong)ram_start);
}

void board_init_r(gd_t *id, ulong ram_start)
{
	char *s;
	int i;
	ulong size;
	static bd_t bd_data;
	init_fnc_t **init_fnc_ptr;

	show_boot_progress(0x21);

	gd = id;
	/* compiler optimization barrier needed for GCC >= 3.4 */
	__asm__ __volatile__("": : :"memory");

	memset (gd, 0, sizeof (gd_t));
	gd->bd = &bd_data;
	memset (gd->bd, 0, sizeof (bd_t));
	show_boot_progress(0x22);

	gd->baudrate =  CONFIG_BAUDRATE;

	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */

	mem_malloc_init((((ulong)ram_start - CONFIG_SYS_MALLOC_LEN)+3)&~3,
			CONFIG_SYS_MALLOC_LEN);

	for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
		show_boot_progress(0xa130|i);

		if ((*init_fnc_ptr)() != 0) {
			hang ();
		}
	}
	show_boot_progress(0x23);

	/* configure available FLASH banks */
	size = flash_init();
	display_flash_config(size);
	show_boot_progress(0x24);

	show_boot_progress(0x25);

	/* initialize environment */
	env_relocate ();
	show_boot_progress(0x26);


	/* IP Address */
	bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");

#if defined(CONFIG_PCI)
	/*
	 * Do pci configuration
	 */
	pci_init();
#endif

	show_boot_progress(0x27);


	stdio_init ();

	jumptable_init ();

	/* Initialize the console (after the relocation and devices init) */
	console_init_r();

#ifdef CONFIG_MISC_INIT_R
	/* miscellaneous platform dependent initialisations */
	misc_init_r();
#endif

#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
	WATCHDOG_RESET();
	puts ("PCMCIA:");
	pcmcia_init();
#endif

#if defined(CONFIG_CMD_KGDB)
	WATCHDOG_RESET();
	puts("KGDB:  ");
	kgdb_init();
#endif

	/* enable exceptions */
	enable_interrupts();
	show_boot_progress(0x28);

	/* Must happen after interrupts are initialized since
	 * an irq handler gets installed
	 */
#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
	serial_buffered_init();
#endif

#ifdef CONFIG_STATUS_LED
	status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
#endif

	udelay(20);

	set_timer (0);

	/* Initialize from environment */
	if ((s = getenv ("loadaddr")) != NULL) {
		load_addr = simple_strtoul (s, NULL, 16);
	}
#if defined(CONFIG_CMD_NET)
	if ((s = getenv ("bootfile")) != NULL) {
		copy_filename (BootFile, s, sizeof (BootFile));
	}
#endif

	WATCHDOG_RESET();

#if defined(CONFIG_CMD_IDE)
	WATCHDOG_RESET();
	puts("IDE:   ");
	ide_init();
#endif

#if defined(CONFIG_CMD_SCSI)
	WATCHDOG_RESET();
	puts("SCSI:  ");
	scsi_init();
#endif

#if defined(CONFIG_CMD_DOC)
	WATCHDOG_RESET();
	puts("DOC:   ");
	doc_init();
#endif

#ifdef CONFIG_BITBANGMII
	bb_miiphy_init();
#endif
#if defined(CONFIG_CMD_NET)
#if defined(CONFIG_NET_MULTI)
	WATCHDOG_RESET();
	puts("Net:   ");
#endif
	eth_initialize(gd->bd);
#endif

#if ( defined(CONFIG_CMD_NET)) && (0)
	WATCHDOG_RESET();
# ifdef DEBUG
	puts ("Reset Ethernet PHY\n");
# endif
	reset_phy();
#endif

#ifdef CONFIG_LAST_STAGE_INIT
	WATCHDOG_RESET();
	/*
	 * Some parts can be only initialized if all others (like
	 * Interrupts) are up and running (i.e. the PC-style ISA
	 * keyboard).
	 */
	last_stage_init();
#endif


#ifdef CONFIG_POST
	post_run (NULL, POST_RAM | post_bootmode_get(0));
#endif


	show_boot_progress(0x29);

	/* main_loop() can return to retry autoboot, if so just run it again. */
	for (;;) {
		main_loop();
	}

	/* NOTREACHED - no way out of command loop except booting */
}

void hang (void)
{
	puts ("### ERROR ### Please RESET the board ###\n");
	for (;;);
}

unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
{
	/*
	 * TODO: Test this function - changed to fix compiler error.
	 * Original code was:
	 *   return (entry >> 1) (argc, argv);
	 * with a comment about Nios function pointers are address >> 1
	 */
	return (entry) (argc, argv);
}