board/nx823/nx823.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2001
  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
  *
  * (C) Copyright 2001-2002
  * 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 <malloc.h>
 #include <mpc8xx.h>

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

 static long int dram_size (long int, long int *, long int);

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

 #define	_NOT_USED_	0xFFFFFFFF

 const uint sdram_table[] = {
 #if (MPC8XX_SPEED <= 50000000L)
 	/*
 	 * Single Read. (Offset 0 in UPMA RAM)
 	 */
 	0x0F07EC04, 0x01BBD804, 0x1FF7F440, 0xFFFFFC07,
 	0xFFFFFFFF,

 	/*
 	 * 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.
 	 *
 	 */
 	0x1FE7F434, 0xEFABE834, 0x1FA7D435,

 	/*
 	 * Burst Read. (Offset 8 in UPMA RAM)
 	 */
 	0x0F07EC04, 0x10EFDC04, 0xF0AFFC00, 0xF0AFFC00,
 	0xF1AFFC00, 0xFFAFFC40, 0xFFAFFC07, 0xFFFFFFFF,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

 	/*
 	 * Single Write. (Offset 18 in UPMA RAM)
 	 */
 	0x0E07E804, 0x01BBD000, 0x1FF7F447, 0xFFFFFFFF,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

 	/*
 	 * Burst Write. (Offset 20 in UPMA RAM)
 	 */
 	0x0E07E800, 0x10EFD400, 0xF0AFFC00, 0xF0AFFC00,
 	0xF1AFFC47, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

 	/*
 	 * Refresh  (Offset 30 in UPMA RAM)
 	 */
 	0x1FF7DC84, 0xFFFFFC04, 0xFFFFFC84, 0xFFFFFC07,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
 	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

 	/*
 	 * Exception. (Offset 3c in UPMA RAM)
 	 */
 	0x7FFFFC07, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
 #else

 	/*
 	 * Single Read. (Offset 0 in UPMA RAM)
 	 */
 	0x1F07FC04, 0xEEAFEC04, 0x11AFDC04, 0xEFBBF800,
 	0x1FF7F447,

 	/*
 	 * 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.
 	 *
 	 */
 	0x1FF7F434, 0xEFEBE834, 0x1FB7D435,

 	/*
 	 * Burst Read. (Offset 8 in UPMA RAM)
 	 */
 	0x1F07FC04, 0xEEAFEC04, 0x10AFDC04, 0xF0AFFC00,
 	0xF0AFFC00, 0xF1AFFC00, 0xEFBBF800, 0x1FF7F447,
 	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,

 	/*
 	 * Single Write. (Offset 18 in UPMA RAM)
 	 */
 	0x1F07FC04, 0xEEAFE800, 0x01BBD004, 0x1FF7F447,
 	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,

 	/*
 	 * Burst Write. (Offset 20 in UPMA RAM)
 	 */
 	0x1F07FC04, 0xEEAFE800, 0x10AFD400, 0xF0AFFC00,
 	0xF0AFFC00, 0xE1BBF804, 0x1FF7F447, _NOT_USED_,
 	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
 	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,

 	/*
 	 * Refresh  (Offset 30 in UPMA RAM)
 	 */
 	0x1FF7DC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
 	0xFFFFFC84, 0xFFFFFC07,
 	_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_,
 #endif
 };

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


 /*
  * Check Board Identity:
  *
  */

 int checkboard (void)
 {
 	printf ("Board: Nexus NX823");
 	return (0);
 }

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

 long int initdram (int board_type)
 {
 	volatile immap_t *immap = (immap_t *) CFG_IMMR;
 	volatile memctl8xx_t *memctl = &immap->im_memctl;
 	long int size_b0, size_b1, size8, size9;

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

 	/*
 	 * Up to 2 Banks of 64Mbit x 2 devices
 	 * Initial builds only have 1
 	 */
 	memctl->memc_mptpr = CFG_MPTPR_1BK_4K;
 	memctl->memc_mar = 0x00000088;

 	/*
 	 * Map controller SDRAM bank 0
 	 */
 	memctl->memc_or1 = CFG_OR1_PRELIM;
 	memctl->memc_br1 = CFG_BR1_PRELIM;
 	memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE));	/* no refresh yet */
 	udelay (200);

 	/*
 	 * Map controller SDRAM bank 1
 	 */
 	memctl->memc_or2 = CFG_OR2_PRELIM;
 	memctl->memc_br2 = CFG_BR2_PRELIM;

 	/*
 	 * Perform SDRAM initializsation sequence
 	 */
 	memctl->memc_mcr = 0x80002105;	/* SDRAM bank 0 */
 	udelay (1);
 	memctl->memc_mcr = 0x80002230;	/* SDRAM bank 0 - execute twice */
 	udelay (1);

 	memctl->memc_mcr = 0x80004105;	/* SDRAM bank 1 */
 	udelay (1);
 	memctl->memc_mcr = 0x80004230;	/* SDRAM bank 1 - execute twice */
 	udelay (1);

 	memctl->memc_mamr |= MAMR_PTAE;	/* enable refresh */
 	udelay (1000);

 	/*
 	 * Preliminary prescaler for refresh (depends on number of
 	 * banks): This value is selected for four cycles every 62.4 us
 	 * with two SDRAM banks or four cycles every 31.2 us with one
 	 * bank. It will be adjusted after memory sizing.
 	 */
 	memctl->memc_mptpr = CFG_MPTPR_2BK_8K;

 	memctl->memc_mar = 0x00000088;


 	/*
 	 * Check Bank 0 Memory Size for re-configuration
 	 *
 	 * try 8 column mode
 	 */
 	size8 = dram_size (CFG_MAMR_8COL, (long *) SDRAM_BASE1_PRELIM,
 			   SDRAM_MAX_SIZE);

 	udelay (1000);

 	/*
 	 * try 9 column mode
 	 */
 	size9 = dram_size (CFG_MAMR_9COL, (long *) SDRAM_BASE1_PRELIM,
 			   SDRAM_MAX_SIZE);

 	if (size8 < size9) {	/* leave configuration at 9 columns     */
 		size_b0 = size9;
 /*	debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20);	*/
 	} else {		/* back to 8 columns                    */
 		size_b0 = size8;
 		memctl->memc_mamr = CFG_MAMR_8COL;
 		udelay (500);
 /*	debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20);	*/
 	}

 	/*
 	 * Check Bank 1 Memory Size
 	 * use current column settings
 	 * [9 column SDRAM may also be used in 8 column mode,
 	 *  but then only half the real size will be used.]
 	 */
 	size_b1 = dram_size (memctl->memc_mamr, (long *) SDRAM_BASE2_PRELIM,
 			     SDRAM_MAX_SIZE);
 /*	debug ("SDRAM Bank 1: %ld MB\n", size8 >> 20);	*/

 	udelay (1000);

 	/*
 	 * Adjust refresh rate depending on SDRAM type, both banks
 	 * For types > 128 MBit leave it at the current (fast) rate
 	 */
 	if ((size_b0 < 0x02000000) && (size_b1 < 0x02000000)) {
 		/* reduce to 15.6 us (62.4 us / quad) */
 		memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
 		udelay (1000);
 	}

 	/*
 	 * Final mapping: map bigger bank first
 	 */
 	if (size_b1 > size_b0) {	/* SDRAM Bank 1 is bigger - map first   */

 		memctl->memc_or2 =
 			((-size_b1) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
 		memctl->memc_br2 =
 			(CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;

 		if (size_b0 > 0) {
 			/*
 			 * Position Bank 0 immediately above Bank 1
 			 */
 			memctl->memc_or1 =
 				((-size_b0) & 0xFFFF0000) |
 				CFG_OR_TIMING_SDRAM;
 			memctl->memc_br1 =
 				((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA |
 				 BR_V)
 				+ size_b1;
 		} else {
 			unsigned long reg;

 			/*
 			 * No bank 0
 			 *
 			 * invalidate bank
 			 */
 			memctl->memc_br1 = 0;

 			/* adjust refresh rate depending on SDRAM type, one bank */
 			reg = memctl->memc_mptpr;
 			reg >>= 1;	/* reduce to CFG_MPTPR_1BK_8K / _4K */
 			memctl->memc_mptpr = reg;
 		}

 	} else {		/* SDRAM Bank 0 is bigger - map first   */

 		memctl->memc_or1 =
 			((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
 		memctl->memc_br1 =
 			(CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;

 		if (size_b1 > 0) {
 			/*
 			 * Position Bank 1 immediately above Bank 0
 			 */
 			memctl->memc_or2 =
 				((-size_b1) & 0xFFFF0000) |
 				CFG_OR_TIMING_SDRAM;
 			memctl->memc_br2 =
 				((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA |
 				 BR_V)
 				+ size_b0;
 		} else {
 			unsigned long reg;

 			/*
 			 * No bank 1
 			 *
 			 * invalidate bank
 			 */
 			memctl->memc_br2 = 0;

 			/* adjust refresh rate depending on SDRAM type, one bank */
 			reg = memctl->memc_mptpr;
 			reg >>= 1;	/* reduce to CFG_MPTPR_1BK_8K / _4K */
 			memctl->memc_mptpr = reg;
 		}
 	}

 	udelay (10000);

 	return (size_b0 + size_b1);
 }

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

 /*
  * 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 *) CFG_IMMR;
 	volatile memctl8xx_t *memctl = &immap->im_memctl;

 	memctl->memc_mamr = mamr_value;

 	return (get_ram_size (base, maxsize));
 }

 u_long *my_sernum;

 int misc_init_r (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	char tmp[50];
 	u_char *e = gd->bd->bi_enetaddr;

 	/* save serial numbre from flash (uniquely programmed) */
 	my_sernum = malloc (8);
 	memcpy (my_sernum, gd->bd->bi_sernum, 8);

 	/* save env variables according to sernum */
 	sprintf (tmp, "%08lx%08lx", my_sernum[0], my_sernum[1]);
 	setenv ("serial#", tmp);

 	sprintf (tmp, "%02x:%02x:%02x:%02x:%02x:%02x", e[0], e[1], e[2], e[3],
 		 e[4], e[5]);
 	setenv ("ethaddr", tmp);
 	return (0);
 }

 void load_sernum_ethaddr (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	int i;
 	bd_t *bd = gd->bd;

 	for (i = 0; i < 8; i++) {
 		bd->bi_sernum[i] = *(u_char *) (CFG_FLASH_SN_BASE + i);
 	}
 	bd->bi_enetaddr[0] = 0x10;
 	bd->bi_enetaddr[1] = 0x20;
 	bd->bi_enetaddr[2] = 0x30;
 	bd->bi_enetaddr[3] = bd->bi_sernum[1] << 4 | bd->bi_sernum[2];
 	bd->bi_enetaddr[4] = bd->bi_sernum[5];
 	bd->bi_enetaddr[5] = bd->bi_sernum[6];
 }
	/*
	* (C) Copyright 2001
	* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
	*
	* (C) Copyright 2001-2002
	* 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 <malloc.h>
	#include <mpc8xx.h>

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

	static long int dram_size (long int, long int *, long int);

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

	#define _NOT_USED_ 0xFFFFFFFF

	const uint sdram_table[] = {
	#if (MPC8XX_SPEED <= 50000000L)
	/*
	* Single Read. (Offset 0 in UPMA RAM)
	*/
	0x0F07EC04, 0x01BBD804, 0x1FF7F440, 0xFFFFFC07,
	0xFFFFFFFF,

	/*
	* 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.
	*
	*/
	0x1FE7F434, 0xEFABE834, 0x1FA7D435,

	/*
	* Burst Read. (Offset 8 in UPMA RAM)
	*/
	0x0F07EC04, 0x10EFDC04, 0xF0AFFC00, 0xF0AFFC00,
	0xF1AFFC00, 0xFFAFFC40, 0xFFAFFC07, 0xFFFFFFFF,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

	/*
	* Single Write. (Offset 18 in UPMA RAM)
	*/
	0x0E07E804, 0x01BBD000, 0x1FF7F447, 0xFFFFFFFF,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

	/*
	* Burst Write. (Offset 20 in UPMA RAM)
	*/
	0x0E07E800, 0x10EFD400, 0xF0AFFC00, 0xF0AFFC00,
	0xF1AFFC47, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

	/*
	* Refresh (Offset 30 in UPMA RAM)
	*/
	0x1FF7DC84, 0xFFFFFC04, 0xFFFFFC84, 0xFFFFFC07,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,

	/*
	* Exception. (Offset 3c in UPMA RAM)
	*/
	0x7FFFFC07, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
	#else

	/*
	* Single Read. (Offset 0 in UPMA RAM)
	*/
	0x1F07FC04, 0xEEAFEC04, 0x11AFDC04, 0xEFBBF800,
	0x1FF7F447,

	/*
	* 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.
	*
	*/
	0x1FF7F434, 0xEFEBE834, 0x1FB7D435,

	/*
	* Burst Read. (Offset 8 in UPMA RAM)
	*/
	0x1F07FC04, 0xEEAFEC04, 0x10AFDC04, 0xF0AFFC00,
	0xF0AFFC00, 0xF1AFFC00, 0xEFBBF800, 0x1FF7F447,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,

	/*
	* Single Write. (Offset 18 in UPMA RAM)
	*/
	0x1F07FC04, 0xEEAFE800, 0x01BBD004, 0x1FF7F447,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,

	/*
	* Burst Write. (Offset 20 in UPMA RAM)
	*/
	0x1F07FC04, 0xEEAFE800, 0x10AFD400, 0xF0AFFC00,
	0xF0AFFC00, 0xE1BBF804, 0x1FF7F447, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,

	/*
	* Refresh (Offset 30 in UPMA RAM)
	*/
	0x1FF7DC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
	0xFFFFFC84, 0xFFFFFC07,
	_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_,
	#endif
	};

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


	/*
	* Check Board Identity:
	*
	*/

	int checkboard (void)
	{
	printf ("Board: Nexus NX823");
	return (0);
	}

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

	long int initdram (int board_type)
	{
	volatile immap_t immap = (immap_t ) CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	long int size_b0, size_b1, size8, size9;

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

	/*
	* Up to 2 Banks of 64Mbit x 2 devices
	* Initial builds only have 1
	*/
	memctl->memc_mptpr = CFG_MPTPR_1BK_4K;
	memctl->memc_mar = 0x00000088;

	/*
	* Map controller SDRAM bank 0
	*/
	memctl->memc_or1 = CFG_OR1_PRELIM;
	memctl->memc_br1 = CFG_BR1_PRELIM;
	memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
	udelay (200);

	/*
	* Map controller SDRAM bank 1
	*/
	memctl->memc_or2 = CFG_OR2_PRELIM;
	memctl->memc_br2 = CFG_BR2_PRELIM;

	/*
	* Perform SDRAM initializsation sequence
	*/
	memctl->memc_mcr = 0x80002105; /* SDRAM bank 0 */
	udelay (1);
	memctl->memc_mcr = 0x80002230; /* SDRAM bank 0 - execute twice */
	udelay (1);

	memctl->memc_mcr = 0x80004105; /* SDRAM bank 1 */
	udelay (1);
	memctl->memc_mcr = 0x80004230; /* SDRAM bank 1 - execute twice */
	udelay (1);

	memctl->memc_mamr \|= MAMR_PTAE; /* enable refresh */
	udelay (1000);

	/*
	* Preliminary prescaler for refresh (depends on number of
	* banks): This value is selected for four cycles every 62.4 us
	* with two SDRAM banks or four cycles every 31.2 us with one
	* bank. It will be adjusted after memory sizing.
	*/
	memctl->memc_mptpr = CFG_MPTPR_2BK_8K;

	memctl->memc_mar = 0x00000088;


	/*
	* Check Bank 0 Memory Size for re-configuration
	*
	* try 8 column mode
	*/
	size8 = dram_size (CFG_MAMR_8COL, (long *) SDRAM_BASE1_PRELIM,
	SDRAM_MAX_SIZE);

	udelay (1000);

	/*
	* try 9 column mode
	*/
	size9 = dram_size (CFG_MAMR_9COL, (long *) SDRAM_BASE1_PRELIM,
	SDRAM_MAX_SIZE);

	if (size8 < size9) { /* leave configuration at 9 columns */
	size_b0 = size9;
	/* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */
	} else { /* back to 8 columns */
	size_b0 = size8;
	memctl->memc_mamr = CFG_MAMR_8COL;
	udelay (500);
	/* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */
	}

	/*
	* Check Bank 1 Memory Size
	* use current column settings
	* [9 column SDRAM may also be used in 8 column mode,
	* but then only half the real size will be used.]
	*/
	size_b1 = dram_size (memctl->memc_mamr, (long *) SDRAM_BASE2_PRELIM,
	SDRAM_MAX_SIZE);
	/* debug ("SDRAM Bank 1: %ld MB\n", size8 >> 20); */

	udelay (1000);

	/*
	* Adjust refresh rate depending on SDRAM type, both banks
	* For types > 128 MBit leave it at the current (fast) rate
	*/
	if ((size_b0 < 0x02000000) && (size_b1 < 0x02000000)) {
	/* reduce to 15.6 us (62.4 us / quad) */
	memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
	udelay (1000);
	}

	/*
	* Final mapping: map bigger bank first
	*/
	if (size_b1 > size_b0) { /* SDRAM Bank 1 is bigger - map first */

	memctl->memc_or2 =
	((-size_b1) & 0xFFFF0000) \| CFG_OR_TIMING_SDRAM;
	memctl->memc_br2 =
	(CFG_SDRAM_BASE & BR_BA_MSK) \| BR_MS_UPMA \| BR_V;

	if (size_b0 > 0) {
	/*
	* Position Bank 0 immediately above Bank 1
	*/
	memctl->memc_or1 =
	((-size_b0) & 0xFFFF0000) \|
	CFG_OR_TIMING_SDRAM;
	memctl->memc_br1 =
	((CFG_SDRAM_BASE & BR_BA_MSK) \| BR_MS_UPMA \|
	BR_V)
	+ size_b1;
	} else {
	unsigned long reg;

	/*
	* No bank 0
	*
	* invalidate bank
	*/
	memctl->memc_br1 = 0;

	/* adjust refresh rate depending on SDRAM type, one bank */
	reg = memctl->memc_mptpr;
	reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
	memctl->memc_mptpr = reg;
	}

	} else { /* SDRAM Bank 0 is bigger - map first */

	memctl->memc_or1 =
	((-size_b0) & 0xFFFF0000) \| CFG_OR_TIMING_SDRAM;
	memctl->memc_br1 =
	(CFG_SDRAM_BASE & BR_BA_MSK) \| BR_MS_UPMA \| BR_V;

	if (size_b1 > 0) {
	/*
	* Position Bank 1 immediately above Bank 0
	*/
	memctl->memc_or2 =
	((-size_b1) & 0xFFFF0000) \|
	CFG_OR_TIMING_SDRAM;
	memctl->memc_br2 =
	((CFG_SDRAM_BASE & BR_BA_MSK) \| BR_MS_UPMA \|
	BR_V)
	+ size_b0;
	} else {
	unsigned long reg;

	/*
	* No bank 1
	*
	* invalidate bank
	*/
	memctl->memc_br2 = 0;

	/* adjust refresh rate depending on SDRAM type, one bank */
	reg = memctl->memc_mptpr;
	reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
	memctl->memc_mptpr = reg;
	}
	}

	udelay (10000);

	return (size_b0 + size_b1);
	}

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

	/*
	* 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 ) CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;

	memctl->memc_mamr = mamr_value;

	return (get_ram_size (base, maxsize));
	}

	u_long *my_sernum;

	int misc_init_r (void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	char tmp[50];
	u_char *e = gd->bd->bi_enetaddr;

	/* save serial numbre from flash (uniquely programmed) */
	my_sernum = malloc (8);
	memcpy (my_sernum, gd->bd->bi_sernum, 8);

	/* save env variables according to sernum */
	sprintf (tmp, "%08lx%08lx", my_sernum[0], my_sernum[1]);
	setenv ("serial#", tmp);

	sprintf (tmp, "%02x:%02x:%02x:%02x:%02x:%02x", e[0], e[1], e[2], e[3],
	e[4], e[5]);
	setenv ("ethaddr", tmp);
	return (0);
	}

	void load_sernum_ethaddr (void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	int i;
	bd_t *bd = gd->bd;

	for (i = 0; i < 8; i++) {
	bd->bi_sernum[i] = (u_char ) (CFG_FLASH_SN_BASE + i);
	}
	bd->bi_enetaddr[0] = 0x10;
	bd->bi_enetaddr[1] = 0x20;
	bd->bi_enetaddr[2] = 0x30;
	bd->bi_enetaddr[3] = bd->bi_sernum[1] << 4 \| bd->bi_sernum[2];
	bd->bi_enetaddr[4] = bd->bi_sernum[5];
	bd->bi_enetaddr[5] = bd->bi_sernum[6];
	}