[people/ms/u-boot.git] / board / ip860 / ip860.c

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.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 <commproc.h>
#include <mpc8xx.h>

/* ------------------------------------------------------------------------- */

static long int dram_size (long int, long int *, long int);
unsigned long ip860_get_dram_size(void);
unsigned long ip860_get_clk_freq (void);
/* ------------------------------------------------------------------------- */

#define	_NOT_USED_	0xFFFFFFFF

const uint sdram_table[] = {
	/*
	 * Single Read. (Offset 0 in UPMA RAM)
	 */
	0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
	0x1ff77c47,					/* last */
	/*
	 * SDRAM Initialization (offset 5 in UPMA RAM)
	 *
	 * This is no UPM entry point. The following definition uses
	 * the remaining space to establish an initialization
	 * sequence, which is executed by a RUN command.
	 *
	 */
	0x1ff77c34, 0xefeabc34, 0x1fb57c35,	/* last */
	/*
	 * Burst Read. (Offset 8 in UPMA RAM)
	 */
	0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
	0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47,	/* last */
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Single Write. (Offset 18 in UPMA RAM)
	 */
	0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47,	/* last */
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Burst Write. (Offset 20 in UPMA RAM)
	 */
	0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
	0xf0affc00, 0xe1bbbc04, 0x1ff77c47,	/* last */
	_NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Refresh  (Offset 30 in UPMA RAM)
	 */
	0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	0xfffffc84, 0xfffffc07,		/* last */
	_NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Exception. (Offset 3c in UPMA RAM)
	 */
	0x7ffffc07,					/* last */
	_NOT_USED_, _NOT_USED_, _NOT_USED_,
};


/* ------------------------------------------------------------------------- */
int board_early_init_f(void)
{
    volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
    volatile memctl8xx_t *memctl = &immap->im_memctl;

/* init BCSR chipselect line for ip860_get_clk_freq() and ip860_get_dram_size() */
    memctl->memc_or4 = CONFIG_SYS_OR4;
    memctl->memc_br4 = CONFIG_SYS_BR4;

    return 0;
}


/* ------------------------------------------------------------------------- */

/*
 * Check Board Identity:
 *
 * Test ID string (IP860...)
 */

int checkboard (void)
{
	unsigned char *s, *e;
	unsigned char buf[64];
	int i;

	puts ("Board: ");

	i = getenv_r ("serial#", (char *)buf, sizeof (buf));
	s = (i > 0) ? buf : NULL;

	if (!s || strncmp ((char *)s, "IP860", 5)) {
		puts ("### No HW ID - assuming IP860");
	} else {
		for (e = s; *e; ++e) {
			if (*e == ' ')
				break;
		}

		for (; s < e; ++s) {
			putc (*s);
		}
	}

	putc ('\n');

	return (0);
}

/* ------------------------------------------------------------------------- */

phys_size_t initdram (int board_type)
{
	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	long int size;
	ulong refresh_val;

	upmconfig (UPMA, (uint *) sdram_table,
			   sizeof (sdram_table) / sizeof (uint));

	/*
	 * Preliminary prescaler for refresh
	 */
	if (ip860_get_clk_freq() == 50000000)
	{
		memctl->memc_mptpr = 0x0400;
		refresh_val = 0xC3000000;
	}
	else
	{
		memctl->memc_mptpr = 0x0200;
		refresh_val = 0x9C000000;
	}


	memctl->memc_mar = 0x00000088;

	/*
	 * Map controller banks 2 to the SDRAM address
	 */
	memctl->memc_or2 = CONFIG_SYS_OR2;
	memctl->memc_br2 = CONFIG_SYS_BR2;

	/* IP860 boards have only one bank SDRAM */


	udelay (200);

	/* perform SDRAM initializsation sequence */

	memctl->memc_mamr = 0x00804114 | refresh_val;
	memctl->memc_mcr  = 0x80004105;	/* run precharge pattern from loc 5 */
	udelay(1);
	memctl->memc_mamr = 0x00804118 | refresh_val;
	memctl->memc_mcr  = 0x80004130;	/* run refresh pattern 8 times */


	udelay (1000);

	/*
	 * Check SDRAM Memory Size
	 */
	if (ip860_get_dram_size() == 16)
		size = dram_size (refresh_val | 0x00804114, SDRAM_BASE, SDRAM_MAX_SIZE);
	else
		size = dram_size (refresh_val | 0x00906114, SDRAM_BASE, SDRAM_MAX_SIZE);

	udelay (1000);

	memctl->memc_or2 = ((-size) & 0xFFFF0000) | SDRAM_TIMING;
	memctl->memc_br2 = (CONFIG_SYS_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;

	udelay (10000);

	/*
	 * Also, map other memory to correct position
	 */

#if (defined(CONFIG_SYS_OR1) && defined(CONFIG_SYS_BR1_PRELIM))
	memctl->memc_or1 = CONFIG_SYS_OR1;
	memctl->memc_br1 = CONFIG_SYS_BR1;
#endif

#if defined(CONFIG_SYS_OR3) && defined(CONFIG_SYS_BR3)
	memctl->memc_or3 = CONFIG_SYS_OR3;
	memctl->memc_br3 = CONFIG_SYS_BR3;
#endif

#if defined(CONFIG_SYS_OR4) && defined(CONFIG_SYS_BR4)
	memctl->memc_or4 = CONFIG_SYS_OR4;
	memctl->memc_br4 = CONFIG_SYS_BR4;
#endif

#if defined(CONFIG_SYS_OR5) && defined(CONFIG_SYS_BR5)
	memctl->memc_or5 = CONFIG_SYS_OR5;
	memctl->memc_br5 = CONFIG_SYS_BR5;
#endif

#if defined(CONFIG_SYS_OR6) && defined(CONFIG_SYS_BR6)
	memctl->memc_or6 = CONFIG_SYS_OR6;
	memctl->memc_br6 = CONFIG_SYS_BR6;
#endif

#if defined(CONFIG_SYS_OR7) && defined(CONFIG_SYS_BR7)
	memctl->memc_or7 = CONFIG_SYS_OR7;
	memctl->memc_br7 = CONFIG_SYS_BR7;
#endif

	return (size);
}

/* ------------------------------------------------------------------------- */

/*
 * Check memory range for valid RAM. A simple memory test determines
 * the actually available RAM size between addresses `base' and
 * `base + maxsize'. Some (not all) hardware errors are detected:
 * - short between address lines
 * - short between data lines
 */

static long int dram_size (long int mamr_value, long int *base,
						   long int maxsize)
{
	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;

	memctl->memc_mamr = mamr_value;

	return (get_ram_size(base, maxsize));
}

/* ------------------------------------------------------------------------- */

void reset_phy (void)
{
	volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
	ulong mask = PB_ENET_RESET | PB_ENET_JABD;
	ulong reg;

	/* Make sure PHY is not in low-power mode */
	immr->im_cpm.cp_pbpar &= ~(mask);	/* GPIO */
	immr->im_cpm.cp_pbodr &= ~(mask);	/* active output */

	/* Set  JABD low  (no JABber Disable),
	 * and RESET high (Reset PHY)
	 */
	reg = immr->im_cpm.cp_pbdat;
	reg = (reg & ~PB_ENET_JABD) | PB_ENET_RESET;
	immr->im_cpm.cp_pbdat = reg;

	/* now drive outputs */
	immr->im_cpm.cp_pbdir |= mask;	/* output */
	udelay (1000);
	/*
	   * Release RESET signal
	 */
	immr->im_cpm.cp_pbdat &= ~(PB_ENET_RESET);
	udelay (1000);
}

/* ------------------------------------------------------------------------- */

unsigned long ip860_get_clk_freq(void)
{
	volatile ip860_bcsr_t	*bcsr   = (ip860_bcsr_t *)BCSR_BASE;
	ulong temp;
	uchar sysclk;

	if ((bcsr->bd_status & 0x80) == 0x80)	/* bd_rev valid ? */
		sysclk = (bcsr->bd_rev & 0x18) >> 3;
	else
		sysclk = 0x00;

	switch (sysclk)
	{
		case 0x00:
			temp = 50000000;
			break;

		case 0x01:
			temp = 80000000;
			break;

		default:
			temp = 50000000;
			break;
	}

	return (temp);

}


/* ------------------------------------------------------------------------- */

unsigned long ip860_get_dram_size(void)
{
	volatile ip860_bcsr_t	*bcsr   = (ip860_bcsr_t *)BCSR_BASE;
	ulong temp;
	uchar dram_size;

	if ((bcsr->bd_status & 0x80) == 0x80)	/* bd_rev valid ? */
		dram_size = (bcsr->bd_rev & 0xE0) >> 5;
	else
		dram_size = 0x00;	/* default is 16 MB */

	switch (dram_size)
	{
		case 0x00:
			temp = 16;
			break;

		case 0x01:
			temp = 32;
			break;

		default:
			temp = 16;
			break;
	}

	return (temp);

}

/* ------------------------------------------------------------------------- */
Commit	Line	Data
16f21704 WD	1	/*
	2	* (C) Copyright 2000
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <commproc.h>
	26	#include <mpc8xx.h>
	27
	28	/* ------------------------------------------------------------------------- */
	29
	30	static long int dram_size (long int, long int *, long int);
3bac3513 WD	31	unsigned long ip860_get_dram_size(void);
3bac3513 WD	32	unsigned long ip860_get_clk_freq (void);
16f21704 WD	33	/* ------------------------------------------------------------------------- */
	34
	35	#define _NOT_USED_ 0xFFFFFFFF
	36
	37	const uint sdram_table[] = {
	38	/*
	39	* Single Read. (Offset 0 in UPMA RAM)
	40	*/
	41	0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
	42	0x1ff77c47, /* last */
	43	/*
	44	* SDRAM Initialization (offset 5 in UPMA RAM)
	45	*
	46	* This is no UPM entry point. The following definition uses
	47	* the remaining space to establish an initialization
	48	* sequence, which is executed by a RUN command.
	49	*
	50	*/
	51	0x1ff77c34, 0xefeabc34, 0x1fb57c35, /* last */
	52	/*
	53	* Burst Read. (Offset 8 in UPMA RAM)
	54	*/
	55	0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
	56	0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47, /* last */
	57	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	58	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	59	/*
	60	* Single Write. (Offset 18 in UPMA RAM)
	61	*/
	62	0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47, /* last */
	63	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	64	/*
	65	* Burst Write. (Offset 20 in UPMA RAM)
	66	*/
	67	0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
	68	0xf0affc00, 0xe1bbbc04, 0x1ff77c47, /* last */
	69	_NOT_USED_,
	70	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	71	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	72	/*
	73	* Refresh (Offset 30 in UPMA RAM)
	74	*/
	75	0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	76	0xfffffc84, 0xfffffc07, /* last */
	77	_NOT_USED_, _NOT_USED_,
	78	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	79	/*
	80	* Exception. (Offset 3c in UPMA RAM)
	81	*/
	82	0x7ffffc07, /* last */
	83	_NOT_USED_, _NOT_USED_, _NOT_USED_,
	84	};
	85
3bac3513	86
16f21704	87	/* ------------------------------------------------------------------------- */
c837dcb1	88	int board_early_init_f(void)
3bac3513	89	{
6d0f6bcf	90	volatile immap_t immap = (immap_t )CONFIG_SYS_IMMR;
3bac3513 WD	91	volatile memctl8xx_t *memctl = &immap->im_memctl;
	92
	93	/* init BCSR chipselect line for ip860_get_clk_freq() and ip860_get_dram_size() */
6d0f6bcf JCPV	94	memctl->memc_or4 = CONFIG_SYS_OR4;
6d0f6bcf JCPV	95	memctl->memc_br4 = CONFIG_SYS_BR4;
16f21704	96
3bac3513 WD	97	return 0;
	98	}
	99
	100
	101	/* ------------------------------------------------------------------------- */
16f21704 WD	102
	103	/*
	104	* Check Board Identity:
	105	*
	106	* Test ID string (IP860...)
	107	*/
	108
	109	int checkboard (void)
	110	{
	111	unsigned char s, e;
	112	unsigned char buf[64];
	113	int i;
	114
	115	puts ("Board: ");
	116
77ddac94	117	i = getenv_r ("serial#", (char *)buf, sizeof (buf));
16f21704 WD	118	s = (i > 0) ? buf : NULL;
16f21704 WD	119
77ddac94	120	if (!s \|\| strncmp ((char *)s, "IP860", 5)) {
16f21704 WD	121	puts ("### No HW ID - assuming IP860");
	122	} else {
	123	for (e = s; *e; ++e) {
	124	if (*e == ' ')
	125	break;
	126	}
	127
	128	for (; s < e; ++s) {
	129	putc (*s);
	130	}
	131	}
	132
	133	putc ('\n');
	134
	135	return (0);
	136	}
	137
	138	/* ------------------------------------------------------------------------- */
	139
9973e3c6	140	phys_size_t initdram (int board_type)
16f21704	141	{
6d0f6bcf	142	volatile immap_t immap = (immap_t ) CONFIG_SYS_IMMR;
16f21704 WD	143	volatile memctl8xx_t *memctl = &immap->im_memctl;
16f21704 WD	144	long int size;
3bac3513	145	ulong refresh_val;
16f21704 WD	146
	147	upmconfig (UPMA, (uint *) sdram_table,
	148	sizeof (sdram_table) / sizeof (uint));
	149
	150	/*
	151	* Preliminary prescaler for refresh
	152	*/
3bac3513 WD	153	if (ip860_get_clk_freq() == 50000000)
	154	{
	155	memctl->memc_mptpr = 0x0400;
	156	refresh_val = 0xC3000000;
	157	}
	158	else
	159	{
	160	memctl->memc_mptpr = 0x0200;
	161	refresh_val = 0x9C000000;
	162	}
	163
16f21704 WD	164
	165	memctl->memc_mar = 0x00000088;
	166
	167	/*
	168	* Map controller banks 2 to the SDRAM address
	169	*/
6d0f6bcf JCPV	170	memctl->memc_or2 = CONFIG_SYS_OR2;
6d0f6bcf JCPV	171	memctl->memc_br2 = CONFIG_SYS_BR2;
16f21704 WD	172
	173	/* IP860 boards have only one bank SDRAM */
	174
	175
	176	udelay (200);
	177
	178	/* perform SDRAM initializsation sequence */
	179
3bac3513 WD	180	memctl->memc_mamr = 0x00804114 \| refresh_val;
	181	memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */
	182	udelay(1);
	183	memctl->memc_mamr = 0x00804118 \| refresh_val;
	184	memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */
	185
16f21704 WD	186
	187	udelay (1000);
	188
	189	/*
	190	* Check SDRAM Memory Size
	191	*/
3bac3513	192	if (ip860_get_dram_size() == 16)
77ddac94	193	size = dram_size (refresh_val \| 0x00804114, SDRAM_BASE, SDRAM_MAX_SIZE);
3bac3513	194	else
77ddac94	195	size = dram_size (refresh_val \| 0x00906114, SDRAM_BASE, SDRAM_MAX_SIZE);
16f21704 WD	196
	197	udelay (1000);
	198
	199	memctl->memc_or2 = ((-size) & 0xFFFF0000) \| SDRAM_TIMING;
6d0f6bcf	200	memctl->memc_br2 = (CONFIG_SYS_SDRAM_BASE & BR_BA_MSK) \| BR_MS_UPMA \| BR_V;
16f21704 WD	201
	202	udelay (10000);
	203
	204	/*
	205	* Also, map other memory to correct position
	206	*/
	207
6d0f6bcf JCPV	208	#if (defined(CONFIG_SYS_OR1) && defined(CONFIG_SYS_BR1_PRELIM))
	209	memctl->memc_or1 = CONFIG_SYS_OR1;
	210	memctl->memc_br1 = CONFIG_SYS_BR1;
16f21704 WD	211	#endif
16f21704 WD	212
6d0f6bcf JCPV	213	#if defined(CONFIG_SYS_OR3) && defined(CONFIG_SYS_BR3)
	214	memctl->memc_or3 = CONFIG_SYS_OR3;
	215	memctl->memc_br3 = CONFIG_SYS_BR3;
16f21704 WD	216	#endif
16f21704 WD	217
6d0f6bcf JCPV	218	#if defined(CONFIG_SYS_OR4) && defined(CONFIG_SYS_BR4)
	219	memctl->memc_or4 = CONFIG_SYS_OR4;
	220	memctl->memc_br4 = CONFIG_SYS_BR4;
16f21704 WD	221	#endif
16f21704 WD	222
6d0f6bcf JCPV	223	#if defined(CONFIG_SYS_OR5) && defined(CONFIG_SYS_BR5)
	224	memctl->memc_or5 = CONFIG_SYS_OR5;
	225	memctl->memc_br5 = CONFIG_SYS_BR5;
16f21704 WD	226	#endif
16f21704 WD	227
6d0f6bcf JCPV	228	#if defined(CONFIG_SYS_OR6) && defined(CONFIG_SYS_BR6)
	229	memctl->memc_or6 = CONFIG_SYS_OR6;
	230	memctl->memc_br6 = CONFIG_SYS_BR6;
16f21704 WD	231	#endif
16f21704 WD	232
6d0f6bcf JCPV	233	#if defined(CONFIG_SYS_OR7) && defined(CONFIG_SYS_BR7)
	234	memctl->memc_or7 = CONFIG_SYS_OR7;
	235	memctl->memc_br7 = CONFIG_SYS_BR7;
16f21704 WD	236	#endif
	237
	238	return (size);
	239	}
	240
	241	/* ------------------------------------------------------------------------- */
	242
	243	/*
	244	* Check memory range for valid RAM. A simple memory test determines
	245	* the actually available RAM size between addresses `base' and
	246	* `base + maxsize'. Some (not all) hardware errors are detected:
	247	* - short between address lines
	248	* - short between data lines
	249	*/
	250
	251	static long int dram_size (long int mamr_value, long int *base,
	252	long int maxsize)
	253	{
6d0f6bcf	254	volatile immap_t immap = (immap_t ) CONFIG_SYS_IMMR;
16f21704	255	volatile memctl8xx_t *memctl = &immap->im_memctl;
16f21704 WD	256
	257	memctl->memc_mamr = mamr_value;
	258
c83bf6a2	259	return (get_ram_size(base, maxsize));
16f21704 WD	260	}
	261
	262	/* ------------------------------------------------------------------------- */
	263
	264	void reset_phy (void)
	265	{
6d0f6bcf	266	volatile immap_t immr = (immap_t ) CONFIG_SYS_IMMR;
16f21704 WD	267	ulong mask = PB_ENET_RESET \| PB_ENET_JABD;
	268	ulong reg;
	269
	270	/* Make sure PHY is not in low-power mode */
	271	immr->im_cpm.cp_pbpar &= ~(mask); /* GPIO */
	272	immr->im_cpm.cp_pbodr &= ~(mask); /* active output */
	273
	274	/* Set JABD low (no JABber Disable),
	275	* and RESET high (Reset PHY)
	276	*/
	277	reg = immr->im_cpm.cp_pbdat;
	278	reg = (reg & ~PB_ENET_JABD) \| PB_ENET_RESET;
	279	immr->im_cpm.cp_pbdat = reg;
	280
	281	/* now drive outputs */
	282	immr->im_cpm.cp_pbdir \|= mask; /* output */
	283	udelay (1000);
	284	/*
	285	* Release RESET signal
	286	*/
	287	immr->im_cpm.cp_pbdat &= ~(PB_ENET_RESET);
	288	udelay (1000);
	289	}
	290
	291	/* ------------------------------------------------------------------------- */
3bac3513 WD	292
	293	unsigned long ip860_get_clk_freq(void)
	294	{
	295	volatile ip860_bcsr_t bcsr = (ip860_bcsr_t )BCSR_BASE;
	296	ulong temp;
	297	uchar sysclk;
	298
	299	if ((bcsr->bd_status & 0x80) == 0x80) /* bd_rev valid ? */
	300	sysclk = (bcsr->bd_rev & 0x18) >> 3;
	301	else
	302	sysclk = 0x00;
	303
	304	switch (sysclk)
	305	{
	306	case 0x00:
	307	temp = 50000000;
	308	break;
	309
	310	case 0x01:
	311	temp = 80000000;
	312	break;
	313
	314	default:
	315	temp = 50000000;
	316	break;
	317	}
	318
	319	return (temp);
	320
	321	}
	322
	323
	324	/* ------------------------------------------------------------------------- */
	325
	326	unsigned long ip860_get_dram_size(void)
	327	{
	328	volatile ip860_bcsr_t bcsr = (ip860_bcsr_t )BCSR_BASE;
	329	ulong temp;
	330	uchar dram_size;
	331
	332	if ((bcsr->bd_status & 0x80) == 0x80) /* bd_rev valid ? */
	333	dram_size = (bcsr->bd_rev & 0xE0) >> 5;
	334	else
	335	dram_size = 0x00; /* default is 16 MB */
	336
	337	switch (dram_size)
	338	{
	339	case 0x00:
	340	temp = 16;
	341	break;
	342
	343	case 0x01:
	344	temp = 32;
	345	break;
	346
	347	default:
	348	temp = 16;
	349	break;
	350	}
	351
	352	return (temp);
	353
	354	}
	355
356	/* ------------------------------------------------------------------------- */