board/utx8245/flash.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2001
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2002
  * Gregory E. Allen, gallen@arlut.utexas.edu
  * Matthew E. Karger, karger@arlut.utexas.edu
  * Applied Research Laboratories, The University of Texas at Austin
  *
  * 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 <mpc824x.h>
 #include <asm/processor.h>

 #define ROM_CS0_START	0xFF800000
 #define ROM_CS1_START	0xFF000000

 #if defined(CONFIG_ENV_IS_IN_FLASH)
 # ifndef  CONFIG_ENV_ADDR
 #  define CONFIG_ENV_ADDR	(CFG_FLASH_BASE + CONFIG_ENV_OFFSET)
 # endif
 # ifndef  CONFIG_ENV_SIZE
 #  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
 # endif
 # ifndef  CONFIG_ENV_SECT_SIZE
 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
 # endif
 #endif

 #define	FLASH_BANK_SIZE	((uint)(16 * 1024 * 1024))	/* max 16Mbyte */
 #define	MAIN_SECT_SIZE	0x10000
 #define	SECT_SIZE_32KB	0x8000
 #define	SECT_SIZE_8KB	0x2000

 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

 static int write_word (flash_info_t * info, ulong dest, ulong data);
 #if 0
 static void write_via_fpu (vu_long * addr, ulong * data);
 #endif
 static __inline__ unsigned long get_msr (void);
 static __inline__ void set_msr (unsigned long msr);

 /*flash command address offsets*/
 #define ADDR0		(0x555)
 #define ADDR1		(0xAAA)
 #define ADDR3		(0x001)

 #define FLASH_WORD_SIZE unsigned char

 /*---------------------------------------------------------------------*/
 /*#define	DEBUG_FLASH	1 */

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

 unsigned long flash_init (void)
 {
 	int i;		/* flash bank counter */
 	int j;		/* flash device sector counter */
 	int k;		/* flash size calculation loop counter */
 	int N;		/* pow(2,N) is flash size, but we don't have <math.h> */
 	ulong total_size = 0, device_size = 1;
 	unsigned char manuf_id, device_id;

 	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
 		vu_char *addr = (vu_char *) (CFG_FLASH_BASE + i * FLASH_BANK_SIZE);

 		addr[0x555] = 0xAA;		/* get manuf/device info command */
 		addr[0x2AA] = 0x55;		/* 3-cycle command */
 		addr[0x555] = 0x90;

 		manuf_id = addr[0];		/* read back manuf/device info */
 		device_id = addr[1];

 		addr[0x55] = 0x98;		/* CFI command */
 		N = addr[0x27];			/* read back device_size = pow(2,N) */

 		for (k = 0; k < N; k++)	/* calculate device_size = pow(2,N) */
 			device_size *= 2;

 		flash_info[i].size = device_size;
 		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;

 #if defined DEBUG_FLASH
 		printf ("manuf_id = %x, device_id = %x\n", manuf_id, device_id);
 #endif
 		/* find out what kind of flash we are using */
 		if ((manuf_id == (uchar) (AMD_MANUFACT))
 			&& (device_id == AMD_ID_LV033C)) {
 			flash_info[i].flash_id =
 					((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
 					(FLASH_AM033C & FLASH_TYPEMASK);

 			/* set individual sector start addresses */
 			for (j = 0; j < flash_info[i].sector_count; j++) {
 				flash_info[i].start[j] =
 						(CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
 						 j * MAIN_SECT_SIZE);
 			}
 		}

 		else if ((manuf_id == (uchar) (AMD_MANUFACT)) &&
 				 (device_id == AMD_ID_LV116DT)) {
 			flash_info[i].flash_id =
 					((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) |
 					(FLASH_AM160T & FLASH_TYPEMASK);

 			/* set individual sector start addresses */
 			for (j = 0; j < flash_info[i].sector_count; j++) {
 				flash_info[i].start[j] =
 						(CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
 						 j * MAIN_SECT_SIZE);

 				if (j < (CFG_MAX_FLASH_SECT - 3)) {
 					flash_info[i].start[j] =
 							(CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
 							 j * MAIN_SECT_SIZE);
 				} else if (j == (CFG_MAX_FLASH_SECT - 3)) {
 					flash_info[i].start[j] =
 							(flash_info[i].start[j - 1] + SECT_SIZE_32KB);

 				} else {
 					flash_info[i].start[j] =
 							(flash_info[i].start[j - 1] + SECT_SIZE_8KB);
 				}
 			}
 		}

 		else {
 			flash_info[i].flash_id = FLASH_UNKNOWN;
 			addr[0] = 0xFF;
 			goto Done;
 		}

 #if defined DEBUG_FLASH
 		printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
 #endif

 		addr[0] = 0xFF;

 		memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);

 		total_size += flash_info[i].size;
 	}

 	/* Protect monitor and environment sectors
 	 */
 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 	flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE,
 				   CFG_MONITOR_BASE + monitor_flash_len - 1,
 				   &flash_info[0]);
 #endif

 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 	flash_protect (FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 			CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
 #endif

   Done:
 	return total_size;
 }

 /*-----------------------------------------------------------------------
  */
 void flash_print_info (flash_info_t * info)
 {
 	static const char unk[] = "Unknown";
 	const char *mfct = unk, *type = unk;
 	unsigned int i;

 	if (info->flash_id != FLASH_UNKNOWN) {
 		switch (info->flash_id & FLASH_VENDMASK) {
 		case FLASH_MAN_AMD:
 			mfct = "AMD";
 			break;
 		case FLASH_MAN_FUJ:
 			mfct = "FUJITSU";
 			break;
 		case FLASH_MAN_STM:
 			mfct = "STM";
 			break;
 		case FLASH_MAN_SST:
 			mfct = "SST";
 			break;
 		case FLASH_MAN_BM:
 			mfct = "Bright Microelectonics";
 			break;
 		case FLASH_MAN_INTEL:
 			mfct = "Intel";
 			break;
 		}

 		switch (info->flash_id & FLASH_TYPEMASK) {
 		case FLASH_AM033C:
 			type = "AM29LV033C (32 Mbit, uniform sector size)";
 			break;
 		case FLASH_AM160T:
 			type = "AM29LV160T (16 Mbit, top boot sector)";
 			break;
 		case FLASH_AM040:
 			type = "AM29F040B (512K * 8, uniform sector size)";
 			break;
 		case FLASH_AM400B:
 			type = "AM29LV400B (4 Mbit, bottom boot sect)";
 			break;
 		case FLASH_AM400T:
 			type = "AM29LV400T (4 Mbit, top boot sector)";
 			break;
 		case FLASH_AM800B:
 			type = "AM29LV800B (8 Mbit, bottom boot sect)";
 			break;
 		case FLASH_AM800T:
 			type = "AM29LV800T (8 Mbit, top boot sector)";
 			break;
 		case FLASH_AM320B:
 			type = "AM29LV320B (32 Mbit, bottom boot sect)";
 			break;
 		case FLASH_AM320T:
 			type = "AM29LV320T (32 Mbit, top boot sector)";
 			break;
 		case FLASH_STM800AB:
 			type = "M29W800AB (8 Mbit, bottom boot sect)";
 			break;
 		case FLASH_SST800A:
 			type = "SST39LF/VF800 (8 Mbit, uniform sector size)";
 			break;
 		case FLASH_SST160A:
 			type = "SST39LF/VF160 (16 Mbit, uniform sector size)";
 			break;
 		}
 	}

 	printf ("\n  Brand: %s Type: %s\n"
 			"  Size: %lu KB in %d Sectors\n",
 			mfct, type, info->size >> 10, info->sector_count);

 	printf ("  Sector Start Addresses:");

 	for (i = 0; i < info->sector_count; i++) {
 		unsigned long size;
 		unsigned int erased;
 		unsigned long *flash = (unsigned long *) info->start[i];

 		/*
 		 * Check if whole sector is erased
 		 */
 		size = (i != (info->sector_count - 1)) ?
 				(info->start[i + 1] - info->start[i]) >> 2 :
 				(info->start[0] + info->size - info->start[i]) >> 2;

 		for (flash = (unsigned long *) info->start[i], erased = 1;
 			 (flash != (unsigned long *) info->start[i] + size) && erased;
 			 flash++)
 			erased = *flash == ~0x0UL;

 		printf ("%s %08lX %s %s",
 				(i % 5) ? "" : "\n   ",
 				info->start[i],
 				erased ? "E" : " ", info->protect[i] ? "RO" : "  ");
 	}

 	puts ("\n");
 	return;
 }

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

 int flash_erase (flash_info_t * info, int s_first, int s_last)
 {
 	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
 	int flag, prot, sect, l_sect;
 	ulong start, now, last;
 	unsigned char sh8b;

 	if ((s_first < 0) || (s_first > s_last)) {
 		if (info->flash_id == FLASH_UNKNOWN) {
 			printf ("- missing\n");
 		} else {
 			printf ("- no sectors to erase\n");
 		}
 		return 1;
 	}

 	if ((info->flash_id == FLASH_UNKNOWN) ||
 		(info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
 		printf ("Can't erase unknown flash type - aborted\n");
 		return 1;
 	}

 	prot = 0;
 	for (sect = s_first; sect <= s_last; ++sect) {
 		if (info->protect[sect]) {
 			prot++;
 		}
 	}

 	if (prot) {
 		printf ("- Warning: %d protected sectors will not be erased!\n",
 				prot);
 	} else {
 		printf ("\n");
 	}

 	l_sect = -1;

 	/* Check the ROM CS */
 	if ((info->start[0] >= ROM_CS1_START)
 		&& (info->start[0] < ROM_CS0_START))
 		sh8b = 3;
 	else
 		sh8b = 0;

 	/* Disable interrupts which might cause a timeout here */
 	flag = disable_interrupts ();

 	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 	addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
 	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 	addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last; sect++) {
 		if (info->protect[sect] == 0) {	/* not protected */
 			addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->
 														   start[sect] -
 														   info->
 														   start[0]) <<
 														  sh8b));

 			if (info->flash_id & FLASH_MAN_SST) {
 				addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 				addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 				addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
 				addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 				addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 				addr[0] = (FLASH_WORD_SIZE) 0x00500050;	/* block erase */
 				udelay (30000);	/* wait 30 ms */
 			} else {
 				addr[0] = (FLASH_WORD_SIZE) 0x00300030;	/* sector erase */
 			}

 			l_sect = sect;
 		}
 	}

 	/* re-enable interrupts if necessary */
 	if (flag)
 		enable_interrupts ();

 	/* wait at least 80us - let's wait 1 ms */
 	udelay (1000);

 	/*
 	 * We wait for the last triggered sector
 	 */
 	if (l_sect < 0)
 		goto DONE;

 	start = get_timer (0);
 	last = start;
 	addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] -
 												   info->
 												   start[0]) << sh8b));
 	while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
 		   (FLASH_WORD_SIZE) 0x00800080) {
 		if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
 			printf ("Timeout\n");
 			return 1;
 		}
 		/* show that we're waiting */
 		if ((now - last) > 1000) {	/* every second */
 			serial_putc ('.');
 			last = now;
 		}
 	}

   DONE:
 	/* reset to read mode */
 	addr = (FLASH_WORD_SIZE *) info->start[0];
 	addr[0] = (FLASH_WORD_SIZE) 0x00F000F0;	/* reset bank */

 	printf (" done\n");
 	return 0;
 }


 /*-----------------------------------------------------------------------
  * Copy memory to flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */

 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 {
 	ulong cp, wp, data;
 	int i, l, rc;

 	wp = (addr & ~3);			/* get lower word aligned address */

 	/*
 	 * handle unaligned start bytes
 	 */
 	if ((l = addr - wp) != 0) {
 		data = 0;
 		for (i = 0, cp = wp; i < l; ++i, ++cp) {
 			data = (data << 8) | (*(uchar *) cp);
 		}
 		for (; i < 4 && cnt > 0; ++i) {
 			data = (data << 8) | *src++;
 			--cnt;
 			++cp;
 		}
 		for (; cnt == 0 && i < 4; ++i, ++cp) {
 			data = (data << 8) | (*(uchar *) cp);
 		}

 		if ((rc = write_word (info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp += 4;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 4) {
 		data = 0;
 		for (i = 0; i < 4; ++i) {
 			data = (data << 8) | *src++;
 		}
 		if ((rc = write_word (info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp += 4;
 		cnt -= 4;
 	}

 	if (cnt == 0) {
 		return (0);
 	}

 	/*
 	 * handle unaligned tail bytes
 	 */
 	data = 0;
 	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 		data = (data << 8) | *src++;
 		--cnt;
 	}
 	for (; i < 4; ++i, ++cp) {
 		data = (data << 8) | (*(uchar *) cp);
 	}

 	return (write_word (info, wp, data));
 }


 /*-----------------------------------------------------------------------
  * Write a word to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_word (flash_info_t * info, ulong dest, ulong data)
 {
 	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) info->start[0];
 	volatile FLASH_WORD_SIZE *dest2;
 	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 	ulong start;
 	int flag;
 	int i;
 	unsigned char sh8b;

 	/* Check the ROM CS */
 	if ((info->start[0] >= ROM_CS1_START)
 		&& (info->start[0] < ROM_CS0_START))
 		sh8b = 3;
 	else
 		sh8b = 0;

 	dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) +
 								 info->start[0]);

 	/* Check if Flash is (sufficiently) erased */
 	if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 		return (2);
 	}
 	/* Disable interrupts which might cause a timeout here */
 	flag = disable_interrupts ();

 	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 		addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 		addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 		addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0;

 		dest2[i << sh8b] = data2[i];

 		/* re-enable interrupts if necessary */
 		if (flag)
 			enable_interrupts ();

 		/* data polling for D7 */
 		start = get_timer (0);
 		while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) !=
 			   (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 			if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 				return (1);
 			}
 		}
 	}

 	return (0);
 }

 /*-----------------------------------------------------------------------
  */
 #if 0
 static void write_via_fpu (vu_long * addr, ulong * data)
 {
 	__asm__ __volatile__ ("lfd  1, 0(%0)"::"r" (data));
 	__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
 }
 #endif

 /*-----------------------------------------------------------------------
  */
 static __inline__ unsigned long get_msr (void)
 {
 	unsigned long msr;

 	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);

 	return msr;
 }

 static __inline__ void set_msr (unsigned long msr)
 {
 	__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
 }
	/*
	* (C) Copyright 2001
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* (C) Copyright 2002
	* Gregory E. Allen, gallen@arlut.utexas.edu
	* Matthew E. Karger, karger@arlut.utexas.edu
	* Applied Research Laboratories, The University of Texas at Austin
	*
	* 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 <mpc824x.h>
	#include <asm/processor.h>

	#define ROM_CS0_START 0xFF800000
	#define ROM_CS1_START 0xFF000000

	#if defined(CONFIG_ENV_IS_IN_FLASH)
	# ifndef CONFIG_ENV_ADDR
	# define CONFIG_ENV_ADDR (CFG_FLASH_BASE + CONFIG_ENV_OFFSET)
	# endif
	# ifndef CONFIG_ENV_SIZE
	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
	# endif
	# ifndef CONFIG_ENV_SECT_SIZE
	# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
	# endif
	#endif

	#define FLASH_BANK_SIZE ((uint)(16 * 1024 * 1024)) /* max 16Mbyte */
	#define MAIN_SECT_SIZE 0x10000
	#define SECT_SIZE_32KB 0x8000
	#define SECT_SIZE_8KB 0x2000

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

	static int write_word (flash_info_t * info, ulong dest, ulong data);
	#if 0
	static void write_via_fpu (vu_long * addr, ulong * data);
	#endif
	static __inline__ unsigned long get_msr (void);
	static __inline__ void set_msr (unsigned long msr);

	/flash command address offsets/
	#define ADDR0 (0x555)
	#define ADDR1 (0xAAA)
	#define ADDR3 (0x001)

	#define FLASH_WORD_SIZE unsigned char

	/---------------------------------------------------------------------/
	/#define DEBUG_FLASH 1 /

	/---------------------------------------------------------------------/

	unsigned long flash_init (void)
	{
	int i; /* flash bank counter */
	int j; /* flash device sector counter */
	int k; /* flash size calculation loop counter */
	int N; /* pow(2,N) is flash size, but we don't have <math.h> */
	ulong total_size = 0, device_size = 1;
	unsigned char manuf_id, device_id;

	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
	vu_char addr = (vu_char ) (CFG_FLASH_BASE + i * FLASH_BANK_SIZE);

	addr[0x555] = 0xAA; /* get manuf/device info command */
	addr[0x2AA] = 0x55; /* 3-cycle command */
	addr[0x555] = 0x90;

	manuf_id = addr[0]; /* read back manuf/device info */
	device_id = addr[1];

	addr[0x55] = 0x98; /* CFI command */
	N = addr[0x27]; /* read back device_size = pow(2,N) */

	for (k = 0; k < N; k++) /* calculate device_size = pow(2,N) */
	device_size *= 2;

	flash_info[i].size = device_size;
	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;

	#if defined DEBUG_FLASH
	printf ("manuf_id = %x, device_id = %x\n", manuf_id, device_id);
	#endif
	/* find out what kind of flash we are using */
	if ((manuf_id == (uchar) (AMD_MANUFACT))
	&& (device_id == AMD_ID_LV033C)) {
	flash_info[i].flash_id =
	((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) \|
	(FLASH_AM033C & FLASH_TYPEMASK);

	/* set individual sector start addresses */
	for (j = 0; j < flash_info[i].sector_count; j++) {
	flash_info[i].start[j] =
	(CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
	j * MAIN_SECT_SIZE);
	}
	}

	else if ((manuf_id == (uchar) (AMD_MANUFACT)) &&
	(device_id == AMD_ID_LV116DT)) {
	flash_info[i].flash_id =
	((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) \|
	(FLASH_AM160T & FLASH_TYPEMASK);

	/* set individual sector start addresses */
	for (j = 0; j < flash_info[i].sector_count; j++) {
	flash_info[i].start[j] =
	(CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
	j * MAIN_SECT_SIZE);

	if (j < (CFG_MAX_FLASH_SECT - 3)) {
	flash_info[i].start[j] =
	(CFG_FLASH_BASE + i * FLASH_BANK_SIZE +
	j * MAIN_SECT_SIZE);
	} else if (j == (CFG_MAX_FLASH_SECT - 3)) {
	flash_info[i].start[j] =
	(flash_info[i].start[j - 1] + SECT_SIZE_32KB);

	} else {
	flash_info[i].start[j] =
	(flash_info[i].start[j - 1] + SECT_SIZE_8KB);
	}
	}
	}

	else {
	flash_info[i].flash_id = FLASH_UNKNOWN;
	addr[0] = 0xFF;
	goto Done;
	}

	#if defined DEBUG_FLASH
	printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
	#endif

	addr[0] = 0xFF;

	memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);

	total_size += flash_info[i].size;
	}

	/* Protect monitor and environment sectors
	*/
	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE,
	CFG_MONITOR_BASE + monitor_flash_len - 1,
	&flash_info[0]);
	#endif

	#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
	flash_protect (FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
	#endif

	Done:
	return total_size;
	}

	/*-----------------------------------------------------------------------
	*/
	void flash_print_info (flash_info_t * info)
	{
	static const char unk[] = "Unknown";
	const char mfct = unk, type = unk;
	unsigned int i;

	if (info->flash_id != FLASH_UNKNOWN) {
	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:
	mfct = "AMD";
	break;
	case FLASH_MAN_FUJ:
	mfct = "FUJITSU";
	break;
	case FLASH_MAN_STM:
	mfct = "STM";
	break;
	case FLASH_MAN_SST:
	mfct = "SST";
	break;
	case FLASH_MAN_BM:
	mfct = "Bright Microelectonics";
	break;
	case FLASH_MAN_INTEL:
	mfct = "Intel";
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM033C:
	type = "AM29LV033C (32 Mbit, uniform sector size)";
	break;
	case FLASH_AM160T:
	type = "AM29LV160T (16 Mbit, top boot sector)";
	break;
	case FLASH_AM040:
	type = "AM29F040B (512K * 8, uniform sector size)";
	break;
	case FLASH_AM400B:
	type = "AM29LV400B (4 Mbit, bottom boot sect)";
	break;
	case FLASH_AM400T:
	type = "AM29LV400T (4 Mbit, top boot sector)";
	break;
	case FLASH_AM800B:
	type = "AM29LV800B (8 Mbit, bottom boot sect)";
	break;
	case FLASH_AM800T:
	type = "AM29LV800T (8 Mbit, top boot sector)";
	break;
	case FLASH_AM320B:
	type = "AM29LV320B (32 Mbit, bottom boot sect)";
	break;
	case FLASH_AM320T:
	type = "AM29LV320T (32 Mbit, top boot sector)";
	break;
	case FLASH_STM800AB:
	type = "M29W800AB (8 Mbit, bottom boot sect)";
	break;
	case FLASH_SST800A:
	type = "SST39LF/VF800 (8 Mbit, uniform sector size)";
	break;
	case FLASH_SST160A:
	type = "SST39LF/VF160 (16 Mbit, uniform sector size)";
	break;
	}
	}

	printf ("\n Brand: %s Type: %s\n"
	" Size: %lu KB in %d Sectors\n",
	mfct, type, info->size >> 10, info->sector_count);

	printf (" Sector Start Addresses:");

	for (i = 0; i < info->sector_count; i++) {
	unsigned long size;
	unsigned int erased;
	unsigned long flash = (unsigned long ) info->start[i];

	/*
	* Check if whole sector is erased
	*/
	size = (i != (info->sector_count - 1)) ?
	(info->start[i + 1] - info->start[i]) >> 2 :
	(info->start[0] + info->size - info->start[i]) >> 2;

	for (flash = (unsigned long *) info->start[i], erased = 1;
	(flash != (unsigned long *) info->start[i] + size) && erased;
	flash++)
	erased = *flash == ~0x0UL;

	printf ("%s %08lX %s %s",
	(i % 5) ? "" : "\n ",
	info->start[i],
	erased ? "E" : " ", info->protect[i] ? "RO" : " ");
	}

	puts ("\n");
	return;
	}

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

	int flash_erase (flash_info_t * info, int s_first, int s_last)
	{
	volatile FLASH_WORD_SIZE addr = (FLASH_WORD_SIZE ) (info->start[0]);
	int flag, prot, sect, l_sect;
	ulong start, now, last;
	unsigned char sh8b;

	if ((s_first < 0) \|\| (s_first > s_last)) {
	if (info->flash_id == FLASH_UNKNOWN) {
	printf ("- missing\n");
	} else {
	printf ("- no sectors to erase\n");
	}
	return 1;
	}

	if ((info->flash_id == FLASH_UNKNOWN) \|\|
	(info->flash_id > (FLASH_MAN_STM \| FLASH_AMD_COMP))) {
	printf ("Can't erase unknown flash type - aborted\n");
	return 1;
	}

	prot = 0;
	for (sect = s_first; sect <= s_last; ++sect) {
	if (info->protect[sect]) {
	prot++;
	}
	}

	if (prot) {
	printf ("- Warning: %d protected sectors will not be erased!\n",
	prot);
	} else {
	printf ("\n");
	}

	l_sect = -1;

	/* Check the ROM CS */
	if ((info->start[0] >= ROM_CS1_START)
	&& (info->start[0] < ROM_CS0_START))
	sh8b = 3;
	else
	sh8b = 0;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts ();

	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
	addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
	addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->
	start[sect] -
	info->
	start[0]) <<
	sh8b));

	if (info->flash_id & FLASH_MAN_SST) {
	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
	addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
	addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
	addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
	addr[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
	udelay (30000); /* wait 30 ms */
	} else {
	addr[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
	}

	l_sect = sect;
	}
	}

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts ();

	/* wait at least 80us - let's wait 1 ms */
	udelay (1000);

	/*
	* We wait for the last triggered sector
	*/
	if (l_sect < 0)
	goto DONE;

	start = get_timer (0);
	last = start;
	addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] -
	info->
	start[0]) << sh8b));
	while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
	(FLASH_WORD_SIZE) 0x00800080) {
	if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	return 1;
	}
	/* show that we're waiting */
	if ((now - last) > 1000) { /* every second */
	serial_putc ('.');
	last = now;
	}
	}

	DONE:
	/* reset to read mode */
	addr = (FLASH_WORD_SIZE *) info->start[0];
	addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */

	printf (" done\n");
	return 0;
	}


	/*-----------------------------------------------------------------------
	* Copy memory to flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/

	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3); /* get lower word aligned address */

	/*
	* handle unaligned start bytes
	*/
	if ((l = addr - wp) != 0) {
	data = 0;
	for (i = 0, cp = wp; i < l; ++i, ++cp) {
	data = (data << 8) \| ((uchar ) cp);
	}
	for (; i < 4 && cnt > 0; ++i) {
	data = (data << 8) \| *src++;
	--cnt;
	++cp;
	}
	for (; cnt == 0 && i < 4; ++i, ++cp) {
	data = (data << 8) \| ((uchar ) cp);
	}

	if ((rc = write_word (info, wp, data)) != 0) {
	return (rc);
	}
	wp += 4;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 4) {
	data = 0;
	for (i = 0; i < 4; ++i) {
	data = (data << 8) \| *src++;
	}
	if ((rc = write_word (info, wp, data)) != 0) {
	return (rc);
	}
	wp += 4;
	cnt -= 4;
	}

	if (cnt == 0) {
	return (0);
	}

	/*
	* handle unaligned tail bytes
	*/
	data = 0;
	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
	data = (data << 8) \| *src++;
	--cnt;
	}
	for (; i < 4; ++i, ++cp) {
	data = (data << 8) \| ((uchar ) cp);
	}

	return (write_word (info, wp, data));
	}


	/*-----------------------------------------------------------------------
	* Write a word to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_word (flash_info_t * info, ulong dest, ulong data)
	{
	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE ) info->start[0];
	volatile FLASH_WORD_SIZE *dest2;
	volatile FLASH_WORD_SIZE data2 = (FLASH_WORD_SIZE ) & data;
	ulong start;
	int flag;
	int i;
	unsigned char sh8b;

	/* Check the ROM CS */
	if ((info->start[0] >= ROM_CS1_START)
	&& (info->start[0] < ROM_CS0_START))
	sh8b = 3;
	else
	sh8b = 0;

	dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) +
	info->start[0]);

	/* Check if Flash is (sufficiently) erased */
	if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
	return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts ();

	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
	addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
	addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
	addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0;

	dest2[i << sh8b] = data2[i];

	/* re-enable interrupts if necessary */
	if (flag)
	enable_interrupts ();

	/* data polling for D7 */
	start = get_timer (0);
	while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) !=
	(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
	if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
	return (1);
	}
	}
	}

	return (0);
	}

	/*-----------------------------------------------------------------------
	*/
	#if 0
	static void write_via_fpu (vu_long * addr, ulong * data)
	{
	__asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data));
	__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
	}
	#endif

	/*-----------------------------------------------------------------------
	*/
	static __inline__ unsigned long get_msr (void)
	{
	unsigned long msr;

	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);

	return msr;
	}

	static __inline__ void set_msr (unsigned long msr)
	{
	__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
	}