board.c

uboot详细解读可用启动引导LINUX2.6内核

			bd->bi_iic_fast[1] = 0;
		}
	}
#else
	bd->bi_iic_fast[0] = 0;
	bd->bi_iic_fast[1] = 0;
#endif	/* CONFIG_I2CFAST */
#endif	/* CONFIG_405GP, CONFIG_405EP */
#endif	/* CFG_EXTBDINFO */

#if defined(CONFIG_SC3)
	sc3_read_eeprom();
#endif

#if defined (CFG_ID_EEPROM) || defined (CFG_I2C_MAC_OFFSET)
	mac_read_from_eeprom();
#endif

	s = getenv ("ethaddr");
#if defined (CONFIG_MBX) || \
    defined (CONFIG_RPXCLASSIC) || \
    defined(CONFIG_IAD210) || \
    defined(CONFIG_V38B)
	if (s == NULL)
		board_get_enetaddr (bd->bi_enetaddr);
	else
#endif
		for (i = 0; i < 6; ++i) {
			bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
			if (s)
				s = (*e) ? e + 1 : e;
		}
#ifdef	CONFIG_HERMES
	if ((gd->board_type >> 16) == 2)
		bd->bi_ethspeed = gd->board_type & 0xFFFF;
	else
		bd->bi_ethspeed = 0xFFFF;
#endif

#ifdef CONFIG_NX823
	load_sernum_ethaddr ();
#endif

#ifdef CONFIG_HAS_ETH1
	/* handle the 2nd ethernet address */

	s = getenv ("eth1addr");

	for (i = 0; i < 6; ++i) {
		bd->bi_enet1addr[i] = s ? simple_strtoul (s, &e, 16) : 0;
		if (s)
			s = (*e) ? e + 1 : e;
	}
#endif
#ifdef CONFIG_HAS_ETH2
	/* handle the 3rd ethernet address */

	s = getenv ("eth2addr");
#if defined(CONFIG_XPEDITE1K) || defined(CONFIG_METROBOX) || defined(CONFIG_KAREF)
	if (s == NULL)
		board_get_enetaddr(bd->bi_enet2addr);
	else
#endif
	for (i = 0; i < 6; ++i) {
		bd->bi_enet2addr[i] = s ? simple_strtoul (s, &e, 16) : 0;
		if (s)
			s = (*e) ? e + 1 : e;
	}
#endif

#ifdef CONFIG_HAS_ETH3
	/* handle 4th ethernet address */
	s = getenv("eth3addr");
#if defined(CONFIG_XPEDITE1K) || defined(CONFIG_METROBOX) || defined(CONFIG_KAREF)
	if (s == NULL)
		board_get_enetaddr(bd->bi_enet3addr);
	else
#endif
	for (i = 0; i < 6; ++i) {
		bd->bi_enet3addr[i] = s ? simple_strtoul (s, &e, 16) : 0;
		if (s)
			s = (*e) ? e + 1 : e;
	}
#endif

#if defined(CONFIG_TQM8xxL) || defined(CONFIG_TQM8260) || \
    defined(CONFIG_TQM8272) || \
    defined(CONFIG_CCM) || defined(CONFIG_KUP4K) || \
    defined(CONFIG_KUP4X) || defined(CONFIG_PCS440EP)
	load_sernum_ethaddr ();
#endif
	/* IP Address */
	bd->bi_ip_addr = getenv_IPaddr ("ipaddr");

	WATCHDOG_RESET ();

#if defined(CONFIG_PCI) && !defined(CONFIG_BAB7xx) && !defined(CONFIG_CPC45)
	/*
	 * Do pci configuration
	 */
	pci_init ();
#endif

/** leave this here (after malloc(), environment and PCI are working) **/
	/* Initialize devices */
	devices_init ();

	/* Initialize the jump table for applications */
	jumptable_init ();

#if defined(CONFIG_API)
	/* Initialize API */
	api_init ();
#endif

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

#if defined(CONFIG_CCM)		|| \
    defined(CONFIG_COGENT)	|| \
    defined(CONFIG_CPCI405)	|| \
    defined(CONFIG_EVB64260)	|| \
    defined(CONFIG_KUP4K)	|| \
    defined(CONFIG_KUP4X)	|| \
    defined(CONFIG_LWMON)	|| \
    defined(CONFIG_PCU_E)	|| \
    defined(CONFIG_SC3)		|| \
    defined(CONFIG_W7O)		|| \
    defined(CONFIG_MISC_INIT_R)
	/* miscellaneous platform dependent initialisations */
	misc_init_r ();
#endif

#ifdef	CONFIG_HERMES
	if (bd->bi_ethspeed != 0xFFFF)
		hermes_start_lxt980 ((int) bd->bi_ethspeed);
#endif

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

	debug ("U-Boot relocated to %08lx\n", dest_addr);

	/*
	 * Enable Interrupts
	 */
	interrupt_init ();

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

#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
	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_SCSI)
	WATCHDOG_RESET ();
	puts ("SCSI:  ");
	scsi_init ();
#endif

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

#if defined(CONFIG_CMD_NET)
#if defined(CONFIG_NET_MULTI)
	WATCHDOG_RESET ();
	puts ("Net:   ");
#endif
	eth_initialize (bd);
#endif

#if defined(CONFIG_CMD_NET) && ( \
    defined(CONFIG_CCM)		|| \
    defined(CONFIG_ELPT860)	|| \
    defined(CONFIG_EP8260)	|| \
    defined(CONFIG_IP860)	|| \
    defined(CONFIG_IVML24)	|| \
    defined(CONFIG_IVMS8)	|| \
    defined(CONFIG_MPC8260ADS)	|| \
    defined(CONFIG_MPC8266ADS)	|| \
    defined(CONFIG_MPC8560ADS)	|| \
    defined(CONFIG_PCU_E)	|| \
    defined(CONFIG_RPXSUPER)	|| \
    defined(CONFIG_STXGP3)	|| \
    defined(CONFIG_SPD823TS)	|| \
    defined(CONFIG_RESET_PHY_R)	)

	WATCHDOG_RESET ();
	debug ("Reset Ethernet PHY\n");
	reset_phy ();
#endif

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

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

#if defined(CONFIG_CMD_IDE)
	WATCHDOG_RESET ();
# ifdef	CONFIG_IDE_8xx_PCCARD
	puts ("PCMCIA:");
# else
	puts ("IDE:   ");
#endif
#if defined(CONFIG_START_IDE)
	if (board_start_ide())
		ide_init ();
#else
	ide_init ();
#endif
#endif

#if defined(CONFIG_CMD_SATA)
	puts ("SATA:  ");
	sata_initialize ();
#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

#if defined(CONFIG_CMD_BEDBUG)
	WATCHDOG_RESET ();
	bedbug_init ();
#endif

#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
	/*
	 * Export available size of memory for Linux,
	 * taking into account the protected RAM at top of memory
	 */
	{
		ulong pram;
		uchar memsz[32];
#ifdef CONFIG_PRAM
		char *s;

		if ((s = getenv ("pram")) != NULL) {
			pram = simple_strtoul (s, NULL, 10);
		} else {
			pram = CONFIG_PRAM;
		}
#else
		pram=0;
#endif
#ifdef CONFIG_LOGBUFFER
#ifndef CONFIG_ALT_LB_ADDR
		/* Also take the logbuffer into account (pram is in kB) */
		pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
#endif
#endif
		sprintf ((char *)memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
		setenv ("mem", (char *)memsz);
	}
#endif

#ifdef CONFIG_PS2KBD
	puts ("PS/2:  ");
	kbd_init();
#endif

#ifdef CONFIG_MODEM_SUPPORT
 {
	 extern int do_mdm_init;
	 do_mdm_init = gd->do_mdm_init;
 }
#endif

	/* Initialization complete - start the monitor */

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

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

void hang (void)
{
	puts ("### ERROR ### Please RESET the board ###\n");
	show_boot_progress(-30);
	for (;;);
}

#ifdef CONFIG_MODEM_SUPPORT
/* called from main loop (common/main.c) */
/* 'inline' - We have to do it fast */
static inline void mdm_readline(char *buf, int bufsiz)
{
	char c;
	char *p;
	int n;

	n = 0;
	p = buf;
	for(;;) {
		c = serial_getc();

		/*		dbg("(%c)", c); */

		switch(c) {
		case '\r':
			break;
		case '\n':
			*p = '\0';
			return;

		default:
			if(n++ > bufsiz) {
				*p = '\0';
				return; /* sanity check */
			}
			*p = c;
			p++;
			break;
		}
	}
}

extern void  dbg(const char *fmt, ...);
int mdm_init (void)
{
	char env_str[16];
	char *init_str;
	int i;
	extern char console_buffer[];
	extern void enable_putc(void);
	extern int hwflow_onoff(int);

	enable_putc(); /* enable serial_putc() */

#ifdef CONFIG_HWFLOW
	init_str = getenv("mdm_flow_control");
	if (init_str && (strcmp(init_str, "rts/cts") == 0))
		hwflow_onoff (1);
	else
		hwflow_onoff(-1);
#endif

	for (i = 1;;i++) {
		sprintf(env_str, "mdm_init%d", i);
		if ((init_str = getenv(env_str)) != NULL) {
			serial_puts(init_str);
			serial_puts("\n");
			for(;;) {
				mdm_readline(console_buffer, CFG_CBSIZE);
				dbg("ini%d: [%s]", i, console_buffer);

				if ((strcmp(console_buffer, "OK") == 0) ||
					(strcmp(console_buffer, "ERROR") == 0)) {
					dbg("ini%d: cmd done", i);
					break;
				} else /* in case we are originating call ... */
					if (strncmp(console_buffer, "CONNECT", 7) == 0) {
						dbg("ini%d: connect", i);
						return 0;
					}
			}
		} else
			break; /* no init string - stop modem init */

		udelay(100000);
	}

	udelay(100000);

	/* final stage - wait for connect */
	for(;i > 1;) { /* if 'i' > 1 - wait for connection
				  message from modem */
		mdm_readline(console_buffer, CFG_CBSIZE);
		dbg("ini_f: [%s]", console_buffer);
		if (strncmp(console_buffer, "CONNECT", 7) == 0) {
			dbg("ini_f: connected");
			return 0;
		}
	}

	return 0;
}

#endif

#if 0 /* We could use plain global data, but the resulting code is bigger */
/*
 * Pointer to initial global data area
 *
 * Here we initialize it.
 */
#undef	XTRN_DECLARE_GLOBAL_DATA_PTR
#define XTRN_DECLARE_GLOBAL_DATA_PTR	/* empty = allocate here */
DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
#endif  /* 0 */

/************************************************************************/