board/ppmc7xx/flash.c - u-boot - Git at Google

 /*
  * flash.c
  * -------
  *
  * Flash programming routines for the Wind River PPMC 74xx/7xx
  * based on flash.c from the TQM8260 board.
  *
  * By Richard Danter (richard.danter@windriver.com)
  * Copyright (C) 2005 Wind River Systems
  */

 #include <common.h>
 #include <asm/processor.h>
 #include <74xx_7xx.h>

 #define DWORD unsigned long long

 /* Local function prototypes */
 static int	write_dword (flash_info_t* info, ulong dest, unsigned char *pdata);
 static void	write_via_fpu (volatile DWORD* addr, DWORD* data);

 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

 /*-----------------------------------------------------------------------
  */
 void flash_reset (void)
 {
 	unsigned long msr;
 	DWORD cmd_reset = 0x00F000F000F000F0LL;

 	if (flash_info[0].flash_id != FLASH_UNKNOWN) {
 		msr = get_msr ();
 		set_msr (msr | MSR_FP);

 		write_via_fpu ((DWORD*)flash_info[0].start[0], &cmd_reset );

 		set_msr (msr);
 	}
 }

 /*-----------------------------------------------------------------------
  */
 ulong flash_get_size (ulong baseaddr, flash_info_t * info)
 {
 	int i;
 	unsigned long msr;
 	DWORD flashtest;
 	DWORD cmd_select[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 							0x0090009000900090LL };

 	/* Enable FPU */
 	msr = get_msr ();
 	set_msr (msr | MSR_FP);

 	/* Write auto-select command sequence */
 	write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[0] );
 	write_via_fpu ((DWORD*)(baseaddr + (0x02AA << 3)), &cmd_select[1] );
 	write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[2] );

 	/* Restore FPU */
 	set_msr (msr);

 	/* Read manufacturer ID */
 	flashtest = *(volatile DWORD*)baseaddr;
 	switch ((int)flashtest) {
 	case AMD_MANUFACT:
 		info->flash_id = FLASH_MAN_AMD;
 		break;
 	case FUJ_MANUFACT:
 		info->flash_id = FLASH_MAN_FUJ;
 		break;
 	default:
 		/* No, faulty or unknown flash */
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
 		return (0);
 	}

 	/* Read device ID */
 	flashtest = *(volatile DWORD*)(baseaddr + 8);
 	switch ((long)flashtest) {
 	case AMD_ID_LV800T:
 		info->flash_id += FLASH_AM800T;
 		info->sector_count = 19;
 		info->size = 0x00400000;
 		break;
 	case AMD_ID_LV800B:
 		info->flash_id += FLASH_AM800B;
 		info->sector_count = 19;
 		info->size = 0x00400000;
 		break;
 	case AMD_ID_LV160T:
 		info->flash_id += FLASH_AM160T;
 		info->sector_count = 35;
 		info->size = 0x00800000;
 		break;
 	case AMD_ID_LV160B:
 		info->flash_id += FLASH_AM160B;
 		info->sector_count = 35;
 		info->size = 0x00800000;
 		break;
 	case AMD_ID_DL322T:
 		info->flash_id += FLASH_AMDL322T;
 		info->sector_count = 71;
 		info->size = 0x01000000;
 		break;
 	case AMD_ID_DL322B:
 		info->flash_id += FLASH_AMDL322B;
 		info->sector_count = 71;
 		info->size = 0x01000000;
 		break;
 	case AMD_ID_DL323T:
 		info->flash_id += FLASH_AMDL323T;
 		info->sector_count = 71;
 		info->size = 0x01000000;
 		break;
 	case AMD_ID_DL323B:
 		info->flash_id += FLASH_AMDL323B;
 		info->sector_count = 71;
 		info->size = 0x01000000;
 		break;
 	case AMD_ID_LV640U:
 		info->flash_id += FLASH_AM640U;
 		info->sector_count = 128;
 		info->size = 0x02000000;
 		break;
 	default:
 		/* Unknown flash type */
 		info->flash_id = FLASH_UNKNOWN;
 		return (0);
 	}

 	if ((long)flashtest == AMD_ID_LV640U) {
 		/* set up sector start adress table (uniform sector type) */
 		for (i = 0; i < info->sector_count; i++)
 			info->start[i] = baseaddr + (i * 0x00040000);
 	} else if (info->flash_id & FLASH_BTYPE) {
 		/* set up sector start adress table (bottom sector type) */
 		info->start[0] = baseaddr + 0x00000000;
 		info->start[1] = baseaddr + 0x00010000;
 		info->start[2] = baseaddr + 0x00018000;
 		info->start[3] = baseaddr + 0x00020000;
 		for (i = 4; i < info->sector_count; i++) {
 			info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
 		}
 	} else {
 		/* set up sector start adress table (top sector type) */
 		i = info->sector_count - 1;
 		info->start[i--] = baseaddr + info->size - 0x00010000;
 		info->start[i--] = baseaddr + info->size - 0x00018000;
 		info->start[i--] = baseaddr + info->size - 0x00020000;
 		for (; i >= 0; i--) {
 			info->start[i] = baseaddr + i * 0x00040000;
 		}
 	}

 	/* check for protected sectors */
 	for (i = 0; i < info->sector_count; i++) {
 		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
 		if (*(volatile DWORD*)(info->start[i] + 16) & 0x0001000100010001LL) {
 			info->protect[i] = 1;	/* D0 = 1 if protected */
 		} else {
 			info->protect[i] = 0;
 		}
 	}

 	flash_reset ();
 	return (info->size);
 }

 /*-----------------------------------------------------------------------
  */
 unsigned long flash_init (void)
 {
 	unsigned long size_b0 = 0;
 	int i;

 	/* Init: no FLASHes known */
 	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 		flash_info[i].flash_id = FLASH_UNKNOWN;
 	}

 	/* Static FLASH Bank configuration here (only one bank) */
 	size_b0 = flash_get_size (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 				size_b0, size_b0 >> 20);
 	}

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

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

 	return (size_b0);
 }

 /*-----------------------------------------------------------------------
  */
 void flash_print_info (flash_info_t * info)
 {
 	int i;

 	if (info->flash_id == FLASH_UNKNOWN) {
 		printf ("missing or unknown FLASH type\n");
 		return;
 	}

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case FLASH_MAN_AMD:
 		printf ("AMD ");
 		break;
 	case FLASH_MAN_FUJ:
 		printf ("FUJITSU ");
 		break;
 	default:
 		printf ("Unknown Vendor ");
 		break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case FLASH_AM800T:
 		printf ("29LV800T (8 M, top sector)\n");
 		break;
 	case FLASH_AM800B:
 		printf ("29LV800T (8 M, bottom sector)\n");
 		break;
 	case FLASH_AM160T:
 		printf ("29LV160T (16 M, top sector)\n");
 		break;
 	case FLASH_AM160B:
 		printf ("29LV160B (16 M, bottom sector)\n");
 		break;
 	case FLASH_AMDL322T:
 		printf ("29DL322T (32 M, top sector)\n");
 		break;
 	case FLASH_AMDL322B:
 		printf ("29DL322B (32 M, bottom sector)\n");
 		break;
 	case FLASH_AMDL323T:
 		printf ("29DL323T (32 M, top sector)\n");
 		break;
 	case FLASH_AMDL323B:
 		printf ("29DL323B (32 M, bottom sector)\n");
 		break;
 	case FLASH_AM640U:
 		printf ("29LV640D (64 M, uniform sector)\n");
 		break;
 	default:
 		printf ("Unknown Chip Type\n");
 		break;
 	}

 	printf ("  Size: %ld MB in %d Sectors\n",
 			info->size >> 20, info->sector_count);

 	printf ("  Sector Start Addresses:");
 	for (i = 0; i < info->sector_count; ++i) {
 		if ((i % 5) == 0)
 			printf ("\n   ");
 		printf (" %08lX%s",
 			info->start[i],
 			info->protect[i] ? " (RO)" : "     "
 		);
 	}
 	printf ("\n");
 	return;
 }

 /*-----------------------------------------------------------------------
  */
 int flash_erase (flash_info_t * info, int s_first, int s_last)
 {
 	int flag, prot, sect, l_sect;
 	ulong start, now, last;
 	unsigned long msr;
 	DWORD cmd_erase[6] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 						   0x0080008000800080LL, 0x00AA00AA00AA00AALL,
 						   0x0055005500550055LL, 0x0030003000300030LL };

 	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;
 	}

 	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;

 	/* Enable FPU */
 	msr = get_msr();
 	set_msr ( msr | MSR_FP );

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

 	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[0] );
 	write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[1] );
 	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[2] );
 	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[3] );
 	write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[4] );
 	udelay (1000);

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last; sect++) {
 		if (info->protect[sect] == 0) {	/* not protected */
 			write_via_fpu ((DWORD*)info->start[sect], &cmd_erase[5] );
 			l_sect = sect;
 		}
 	}

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

 	/* Restore FPU */
 	set_msr (msr);

 	/* 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;
 	while ((*(volatile DWORD*)info->start[l_sect] & 0x0080008000800080LL )
 				!= 0x0080008000800080LL )
 	{
 		if ((now = get_timer (start)) > CONFIG_SYS_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 */
 	flash_reset ();

 	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 dp;
 	static unsigned char bb[8];
 	int i, l, rc, cc = cnt;

 	dp = (addr & ~7);		/* get lower dword aligned address */

 	/*
 	 * handle unaligned start bytes
 	 */
 	if ((l = addr - dp) != 0) {
 		for (i = 0; i < 8; i++)
 			bb[i] = (i < l || (i - l) >= cc) ? *(char*)(dp + i) : *src++;
 		if ((rc = write_dword (info, dp, bb)) != 0) {
 			return (rc);
 		}
 		dp += 8;
 		cc -= 8 - l;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cc >= 8) {
 		if ((rc = write_dword (info, dp, src)) != 0) {
 			return (rc);
 		}
 		dp += 8;
 		src += 8;
 		cc -= 8;
 	}

 	if (cc <= 0) {
 		return (0);
 	}

 	/*
 	 * handle unaligned tail bytes
 	 */
 	for (i = 0; i < 8; i++) {
 		bb[i] = (i < cc) ? *src++ : *(char*)(dp + i);
 	}
 	return (write_dword (info, dp, bb));
 }

 /*-----------------------------------------------------------------------
  * Write a dword to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
 {
 	ulong start;
 	unsigned long msr;
 	int flag, i;
 	DWORD data;
 	DWORD cmd_write[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 						   0x00A000A000A000A0LL };

 	for (data = 0, i = 0; i < 8; i++)
 		data = (data << 8) + *pdata++;

 	/* Check if Flash is (sufficiently) erased */
 	if ((*(DWORD*)dest & data) != data) {
 		return (2);
 	}

 	/* Enable FPU */
 	msr = get_msr();
 	set_msr( msr | MSR_FP );

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

 	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[0] );
 	write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_write[1] );
 	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[2] );
 	write_via_fpu ((DWORD*)dest, &data );

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

 	/* Restore FPU */
 	set_msr(msr);

 	/* data polling for D7 */
 	start = get_timer (0);
 	while (*(volatile DWORD*)dest != data ) {
 		if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 			return (1);
 		}
 	}
 	return (0);
 }

 /*-----------------------------------------------------------------------
  */
 static void write_via_fpu (volatile DWORD* addr, DWORD* data)
 {
 	__asm__ __volatile__ ("lfd  1, 0(%0)"::"r" (data));
 	__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
 	__asm__ __volatile__ ("eieio");
 }
	/*
	* flash.c
	* -------
	*
	* Flash programming routines for the Wind River PPMC 74xx/7xx
	* based on flash.c from the TQM8260 board.
	*
	* By Richard Danter (richard.danter@windriver.com)
	* Copyright (C) 2005 Wind River Systems
	*/

	#include <common.h>
	#include <asm/processor.h>
	#include <74xx_7xx.h>

	#define DWORD unsigned long long

	/* Local function prototypes */
	static int write_dword (flash_info_t* info, ulong dest, unsigned char *pdata);
	static void write_via_fpu (volatile DWORD* addr, DWORD* data);

	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

	/*-----------------------------------------------------------------------
	*/
	void flash_reset (void)
	{
	unsigned long msr;
	DWORD cmd_reset = 0x00F000F000F000F0LL;

	if (flash_info[0].flash_id != FLASH_UNKNOWN) {
	msr = get_msr ();
	set_msr (msr \| MSR_FP);

	write_via_fpu ((DWORD*)flash_info[0].start[0], &cmd_reset );

	set_msr (msr);
	}
	}

	/*-----------------------------------------------------------------------
	*/
	ulong flash_get_size (ulong baseaddr, flash_info_t * info)
	{
	int i;
	unsigned long msr;
	DWORD flashtest;
	DWORD cmd_select[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
	0x0090009000900090LL };

	/* Enable FPU */
	msr = get_msr ();
	set_msr (msr \| MSR_FP);

	/* Write auto-select command sequence */
	write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[0] );
	write_via_fpu ((DWORD*)(baseaddr + (0x02AA << 3)), &cmd_select[1] );
	write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[2] );

	/* Restore FPU */
	set_msr (msr);

	/* Read manufacturer ID */
	flashtest = (volatile DWORD)baseaddr;
	switch ((int)flashtest) {
	case AMD_MANUFACT:
	info->flash_id = FLASH_MAN_AMD;
	break;
	case FUJ_MANUFACT:
	info->flash_id = FLASH_MAN_FUJ;
	break;
	default:
	/* No, faulty or unknown flash */
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	return (0);
	}

	/* Read device ID */
	flashtest = (volatile DWORD)(baseaddr + 8);
	switch ((long)flashtest) {
	case AMD_ID_LV800T:
	info->flash_id += FLASH_AM800T;
	info->sector_count = 19;
	info->size = 0x00400000;
	break;
	case AMD_ID_LV800B:
	info->flash_id += FLASH_AM800B;
	info->sector_count = 19;
	info->size = 0x00400000;
	break;
	case AMD_ID_LV160T:
	info->flash_id += FLASH_AM160T;
	info->sector_count = 35;
	info->size = 0x00800000;
	break;
	case AMD_ID_LV160B:
	info->flash_id += FLASH_AM160B;
	info->sector_count = 35;
	info->size = 0x00800000;
	break;
	case AMD_ID_DL322T:
	info->flash_id += FLASH_AMDL322T;
	info->sector_count = 71;
	info->size = 0x01000000;
	break;
	case AMD_ID_DL322B:
	info->flash_id += FLASH_AMDL322B;
	info->sector_count = 71;
	info->size = 0x01000000;
	break;
	case AMD_ID_DL323T:
	info->flash_id += FLASH_AMDL323T;
	info->sector_count = 71;
	info->size = 0x01000000;
	break;
	case AMD_ID_DL323B:
	info->flash_id += FLASH_AMDL323B;
	info->sector_count = 71;
	info->size = 0x01000000;
	break;
	case AMD_ID_LV640U:
	info->flash_id += FLASH_AM640U;
	info->sector_count = 128;
	info->size = 0x02000000;
	break;
	default:
	/* Unknown flash type */
	info->flash_id = FLASH_UNKNOWN;
	return (0);
	}

	if ((long)flashtest == AMD_ID_LV640U) {
	/* set up sector start adress table (uniform sector type) */
	for (i = 0; i < info->sector_count; i++)
	info->start[i] = baseaddr + (i * 0x00040000);
	} else if (info->flash_id & FLASH_BTYPE) {
	/* set up sector start adress table (bottom sector type) */
	info->start[0] = baseaddr + 0x00000000;
	info->start[1] = baseaddr + 0x00010000;
	info->start[2] = baseaddr + 0x00018000;
	info->start[3] = baseaddr + 0x00020000;
	for (i = 4; i < info->sector_count; i++) {
	info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
	}
	} else {
	/* set up sector start adress table (top sector type) */
	i = info->sector_count - 1;
	info->start[i--] = baseaddr + info->size - 0x00010000;
	info->start[i--] = baseaddr + info->size - 0x00018000;
	info->start[i--] = baseaddr + info->size - 0x00020000;
	for (; i >= 0; i--) {
	info->start[i] = baseaddr + i * 0x00040000;
	}
	}

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	if ((volatile DWORD)(info->start[i] + 16) & 0x0001000100010001LL) {
	info->protect[i] = 1; /* D0 = 1 if protected */
	} else {
	info->protect[i] = 0;
	}
	}

	flash_reset ();
	return (info->size);
	}

	/*-----------------------------------------------------------------------
	*/
	unsigned long flash_init (void)
	{
	unsigned long size_b0 = 0;
	int i;

	/* Init: no FLASHes known */
	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
	flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	/* Static FLASH Bank configuration here (only one bank) */
	size_b0 = flash_get_size (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
	if (flash_info[0].flash_id == FLASH_UNKNOWN \|\| size_b0 == 0) {
	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	size_b0, size_b0 >> 20);
	}

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

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

	return (size_b0);
	}

	/*-----------------------------------------------------------------------
	*/
	void flash_print_info (flash_info_t * info)
	{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) {
	printf ("missing or unknown FLASH type\n");
	return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:
	printf ("AMD ");
	break;
	case FLASH_MAN_FUJ:
	printf ("FUJITSU ");
	break;
	default:
	printf ("Unknown Vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM800T:
	printf ("29LV800T (8 M, top sector)\n");
	break;
	case FLASH_AM800B:
	printf ("29LV800T (8 M, bottom sector)\n");
	break;
	case FLASH_AM160T:
	printf ("29LV160T (16 M, top sector)\n");
	break;
	case FLASH_AM160B:
	printf ("29LV160B (16 M, bottom sector)\n");
	break;
	case FLASH_AMDL322T:
	printf ("29DL322T (32 M, top sector)\n");
	break;
	case FLASH_AMDL322B:
	printf ("29DL322B (32 M, bottom sector)\n");
	break;
	case FLASH_AMDL323T:
	printf ("29DL323T (32 M, top sector)\n");
	break;
	case FLASH_AMDL323B:
	printf ("29DL323B (32 M, bottom sector)\n");
	break;
	case FLASH_AM640U:
	printf ("29LV640D (64 M, uniform sector)\n");
	break;
	default:
	printf ("Unknown Chip Type\n");
	break;
	}

	printf (" Size: %ld MB in %d Sectors\n",
	info->size >> 20, info->sector_count);

	printf (" Sector Start Addresses:");
	for (i = 0; i < info->sector_count; ++i) {
	if ((i % 5) == 0)
	printf ("\n ");
	printf (" %08lX%s",
	info->start[i],
	info->protect[i] ? " (RO)" : " "
	);
	}
	printf ("\n");
	return;
	}

	/*-----------------------------------------------------------------------
	*/
	int flash_erase (flash_info_t * info, int s_first, int s_last)
	{
	int flag, prot, sect, l_sect;
	ulong start, now, last;
	unsigned long msr;
	DWORD cmd_erase[6] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
	0x0080008000800080LL, 0x00AA00AA00AA00AALL,
	0x0055005500550055LL, 0x0030003000300030LL };

	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;
	}

	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;

	/* Enable FPU */
	msr = get_msr();
	set_msr ( msr \| MSR_FP );

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

	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[0] );
	write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[1] );
	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[2] );
	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[3] );
	write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[4] );
	udelay (1000);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	write_via_fpu ((DWORD*)info->start[sect], &cmd_erase[5] );
	l_sect = sect;
	}
	}

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

	/* Restore FPU */
	set_msr (msr);

	/* 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;
	while (((volatile DWORD)info->start[l_sect] & 0x0080008000800080LL )
	!= 0x0080008000800080LL )
	{
	if ((now = get_timer (start)) > CONFIG_SYS_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 */
	flash_reset ();

	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 dp;
	static unsigned char bb[8];
	int i, l, rc, cc = cnt;

	dp = (addr & ~7); /* get lower dword aligned address */

	/*
	* handle unaligned start bytes
	*/
	if ((l = addr - dp) != 0) {
	for (i = 0; i < 8; i++)
	bb[i] = (i < l \|\| (i - l) >= cc) ? (char)(dp + i) : *src++;
	if ((rc = write_dword (info, dp, bb)) != 0) {
	return (rc);
	}
	dp += 8;
	cc -= 8 - l;
	}

	/*
	* handle word aligned part
	*/
	while (cc >= 8) {
	if ((rc = write_dword (info, dp, src)) != 0) {
	return (rc);
	}
	dp += 8;
	src += 8;
	cc -= 8;
	}

	if (cc <= 0) {
	return (0);
	}

	/*
	* handle unaligned tail bytes
	*/
	for (i = 0; i < 8; i++) {
	bb[i] = (i < cc) ? src++ : (char*)(dp + i);
	}
	return (write_dword (info, dp, bb));
	}

	/*-----------------------------------------------------------------------
	* Write a dword to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
	{
	ulong start;
	unsigned long msr;
	int flag, i;
	DWORD data;
	DWORD cmd_write[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
	0x00A000A000A000A0LL };

	for (data = 0, i = 0; i < 8; i++)
	data = (data << 8) + *pdata++;

	/* Check if Flash is (sufficiently) erased */
	if (((DWORD)dest & data) != data) {
	return (2);
	}

	/* Enable FPU */
	msr = get_msr();
	set_msr( msr \| MSR_FP );

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

	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[0] );
	write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_write[1] );
	write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[2] );
	write_via_fpu ((DWORD*)dest, &data );

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

	/* Restore FPU */
	set_msr(msr);

	/* data polling for D7 */
	start = get_timer (0);
	while ((volatile DWORD)dest != data ) {
	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
	return (1);
	}
	}
	return (0);
	}

	/*-----------------------------------------------------------------------
	*/
	static void write_via_fpu (volatile DWORD* addr, DWORD* data)
	{
	__asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data));
	__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
	__asm__ __volatile__ ("eieio");
	}