embed_config.c

linux-2.4.29操作系统的源码

	bd->bi_busfreq = 48000000;
}
#endif /* FADS */

#ifdef CONFIG_8260
/* Compute 8260 clock values if the rom doesn't provide them.
 * We can't compute the internal core frequency (I don't know how to
 * do that).
 */
static void
clk_8260(bd_t *bd)
{
	uint	scmr, vco_out, clkin;
	uint	plldf, pllmf, busdf, cpmdf;
	volatile cpm2_map_t	*ip;

	ip = (cpm2_map_t *)CPM_MAP_ADDR;
	scmr = ip->im_clkrst.car_scmr;

	/* The clkin is always bus frequency.
	*/
	clkin = bd->bi_busfreq;

	/* Collect the bits from the scmr.
	*/
	plldf = (scmr >> 12) & 1;
	pllmf = scmr & 0xfff;
	cpmdf = (scmr >> 16) & 0x0f;
	busdf = (scmr >> 20) & 0x0f;

	/* This is arithmetic from the 8260 manual.
	*/
	vco_out = clkin / (plldf + 1);
	vco_out *= 2 * (pllmf + 1);
	bd->bi_vco = vco_out;		/* Save for later */

	bd->bi_cpmfreq = vco_out / 2;	/* CPM Freq, in MHz */

	/* Set Baud rate divisor.  The power up default is divide by 16,
	 * but we set it again here in case it was changed.
	 */
	ip->im_clkrst.car_sccr = 1;	/* DIV 16 BRG */
	bd->bi_brgfreq = vco_out / 16;
}
#endif

#ifdef CONFIG_EST8260
void
embed_config(bd_t **bdp)
{
	u_char	*cp;
	int	i;
	bd_t	*bd;

	bd = *bdp;
#if 0
	/* This is actually provided by my boot rom.  I have it
	 * here for those people that may load the kernel with
	 * a JTAG/COP tool and not the rom monitor.
	 */
	bd->bi_baudrate = 115200;
	bd->bi_intfreq = 200000000;
	bd->bi_busfreq = 66666666;
	bd->bi_cpmfreq = 66666666;
	bd->bi_brgfreq = 33333333;
	bd->bi_memsize = 16 * 1024 * 1024;
#else
	/* The boot rom passes these to us in MHz.  Linux now expects
	 * them to be in Hz.
	 */
	bd->bi_intfreq *= 1000000;
	bd->bi_busfreq *= 1000000;
	bd->bi_cpmfreq *= 1000000;
	bd->bi_brgfreq *= 1000000;
#endif

	cp = (u_char *)def_enet_addr;
	for (i=0; i<6; i++) {
		bd->bi_enetaddr[i] = *cp++;
	}
}
#endif /* EST8260 */

#ifdef CONFIG_SBS8260
void
embed_config(bd_t **bdp)
{
	u_char	*cp;
	int	i;
	bd_t	*bd;

	/* This should provided by the boot rom.
	 */
	bd = &bdinfo;
	*bdp = bd;
	bd->bi_baudrate = 9600;
	bd->bi_memsize = 64 * 1024 * 1024;

	/* Set all of the clocks.  We have to know the speed of the
	 * external clock.  The development board had 66 MHz.
	 */
	bd->bi_busfreq = 66666666;
	clk_8260(bd);

	/* I don't know how to compute this yet.
	*/
	bd->bi_intfreq = 133000000;


	cp = (u_char *)def_enet_addr;
	for (i=0; i<6; i++) {
		bd->bi_enetaddr[i] = *cp++;
	}
}
#endif /* SBS8260 */

#ifdef CONFIG_RPX6
void
embed_config(bd_t **bdp)
{
	u_char	*cp, *keyvals;
	bd_t	*bd;

	keyvals = (u_char *)*bdp;

	bd = &bdinfo;
	*bdp = bd;

	/* This is almost identical to the RPX-Lite/Classic functions
	 * on the 8xx boards.  It would be nice to have a key lookup
	 * function in a string, but the format of all of the fields
	 * is slightly different.
	 */
	cp = keyvals;
	for (;;) {
		if (*cp == 'E') {
			cp++;
			if (*cp == 'A') {
				cp += 2;
				rpx_eth(bd, cp);
			}
		}
		if (*cp == 'S') {
			cp++;
			if (*cp == 'B') {
				cp += 2;
				bd->bi_baudrate = rpx_baseten(cp);
			}
		}
		if (*cp == 'D') {
			cp++;
			if (*cp == '1') {
				cp += 2;
				bd->bi_memsize = rpx_baseten(cp) * 1024 * 1024;
			}
		}
		if (*cp == 'X') {
			cp++;
			if (*cp == 'T') {
				cp += 2;
				bd->bi_busfreq = rpx_baseten(cp);
			}
		}
		if (*cp == 'N') {
			cp++;
			if (*cp == 'V') {
				cp += 2;
				bd->bi_nvsize = rpx_baseten(cp) * 1024 * 1024;
			}
		}

		/* Scan to the end of the record.
		*/
		while ((*cp != '\n') && (*cp != 0xff))
			cp++;

		/* If the next character is a 0 or ff, we are done.
		*/
		cp++;
		if ((*cp == 0) || (*cp == 0xff))
			break;
	}
	bd->bi_memstart = 0;

	/* The memory size includes both the 60x and local bus DRAM.
	 * I don't want to use the local bus DRAM for real memory,
	 * so subtract it out.  It would be nice if they were separate
	 * keys.
	 */
	bd->bi_memsize -= 32 * 1024 * 1024;

	/* Set all of the clocks.  We have to know the speed of the
	 * external clock.
	 */
	clk_8260(bd);

	/* I don't know how to compute this yet.
	*/
	bd->bi_intfreq = 200000000;
}
#endif /* RPX6 */

#ifdef CONFIG_ADS8260
void
embed_config(bd_t **bdp)
{
	u_char	*cp;
	int	i;
	bd_t	*bd;

	/* This should provided by the boot rom.
	 */
	bd = &bdinfo;
	*bdp = bd;
	bd->bi_baudrate = 9600;
	bd->bi_memsize = 16 * 1024 * 1024;

	/* Set all of the clocks.  We have to know the speed of the
	 * external clock.  The development board had 66 MHz.
	 */
	bd->bi_busfreq = 66666666;
	clk_8260(bd);

	/* I don't know how to compute this yet.
	*/
	bd->bi_intfreq = 200000000;


	cp = (u_char *)def_enet_addr;
	for (i=0; i<6; i++) {
		bd->bi_enetaddr[i] = *cp++;
	}
}
#endif /* ADS8260 */

#ifdef CONFIG_WILLOW
void
embed_config(bd_t **bdp)
{
	u_char	*cp;
	int	i;
	bd_t	*bd;

	/* Willow has Open Firmware....I should learn how to get this
	 * information from it.
	 */
	bd = &bdinfo;
	*bdp = bd;
	bd->bi_baudrate = 9600;
	bd->bi_memsize = 32 * 1024 * 1024;

	/* Set all of the clocks.  We have to know the speed of the
	 * external clock.  The development board had 66 MHz.
	 */
	bd->bi_busfreq = 66666666;
	clk_8260(bd);

	/* I don't know how to compute this yet.
	*/
	bd->bi_intfreq = 200000000;


	cp = (u_char *)def_enet_addr;
	for (i=0; i<6; i++) {
		bd->bi_enetaddr[i] = *cp++;
	}
}
#endif /* WILLOW */

#ifdef CONFIG_IBM_OPENBIOS
/* This could possibly work for all treeboot roms.
*/
#define	BOARD_INFO_VECTOR	0xFFFE0B50

void
embed_config(bd_t **bdp)
{
	u_char	*cp;
	int	i;
	bd_t	*bd, *treeboot_bd;
	bd_t *(*get_board_info)(void) =
	    (bd_t *(*)(void))(*(unsigned long *)BOARD_INFO_VECTOR);
#if !defined(CONFIG_STB03xxx)
	/* shut down the Ethernet controller that the boot rom
	 * sometimes leaves running.
	 */
	mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR);                /* 1st reset MAL */
	while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {};    /* wait for the reset */
	out_be32((u32 *)EMAC0_BASE, 0x20000000);        /* then reset EMAC */
	eieio();
#endif

	bd = &bdinfo;
	*bdp = bd;
	if ((treeboot_bd = get_board_info()) != NULL) {
		memcpy(bd, treeboot_bd, sizeof(bd_t));
	}
	else {
		/* Hmmm...better try to stuff some defaults.
		*/
		bd->bi_memsize = 16 * 1024 * 1024;
		cp = (u_char *)def_enet_addr;
		for (i=0; i<6; i++) {
			/* I should probably put different ones here,
			 * hopefully only one is used.
			 */
			bd->BD_EMAC_ADDR(0,i) = *cp;

#ifdef CONFIG_PCI
			bd->bi_pci_enetaddr[i] = *cp++;
#endif
		}
		bd->bi_intfreq = 200000000;
		bd->bi_busfreq = 100000000;
#ifdef CONFIG_PCI
		bd->bi_pci_busfreq = 66666666;
#endif
		/* Yeah, this look weird, but on Redwood 4 they are
		 * different object in the structure.  When RW5 uses
		 * OpenBIOS, it requires a special value.
		 */
#ifdef CONFIG_REDWOOD_5
	bd->bi_intfreq = 200 * 1000 * 1000;
	bd->bi_busfreq = 0;

		bd->bi_tbfreq = 27 * 1000 * 1000;
#elif CONFIG_REDWOOD_4
		bd->bi_tbfreq = bd->bi_intfreq;
#endif
	}
}
#endif

#ifdef CONFIG_EP405
void
embed_config(bd_t **bdp)
{
	u_char *cp;
	bd_t	*bd;

	bd = &bdinfo;
	*bdp = bd;
#if 1
	        cp = (u_char *)0xF0000EE0;
	        for (;;) {
	                if (*cp == 'E') {
	                        cp++;
	                        if (*cp == 'A') {
                                  cp += 2;
                                  rpx_eth(bd, cp);
	                        }
		         }

	         	if (*cp == 'D') {
	                        	cp++;
	                        	if (*cp == '1') {
		                                cp += 2;
		                                rpx_memsize(bd, cp);
	        	                }
                	}

			while ((*cp != '\n') && (*cp != 0xff))
			      cp++;

	                cp++;
	                if ((*cp == 0) || (*cp == 0xff))
	                   break;
	       }
	bd->bi_intfreq   = 200000000;
	bd->bi_busfreq   = 100000000;
	bd->bi_pci_busfreq= 33000000 ;
#else

	bd->bi_memsize   = 64000000;
	bd->bi_intfreq   = 200000000;
	bd->bi_busfreq   = 100000000;
	bd->bi_pci_busfreq= 33000000 ;
#endif
	timebase_period_ns = 1000000000 / bd->bi_tbfreq;
}
#endif