[U-Boot] saveenv command erases flash u-boot

From: rudresh <rudresh.tk@lntemsys.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] saveenv command erases flash u-boot
Date: Mon, 23 Feb 2009 03:40:41 -0800 (PST)	[thread overview]
Message-ID: <22159964.post@talk.nabble.com> (raw)
In-Reply-To: <gntln2$bue$1@ger.gmane.org>

Details are as follows .. the flash size 16Mbyte Nor flash.. NAND flash
256MB. 
/*
 * Environment
 */

#if defined(CONFIG_NAND_U_BOOT)
	#define CFG_ENV_IS_IN_NAND	1
	#define CFG_ENV_SIZE		CFG_NAND_BLOCK_SIZE
	#define CFG_ENV_OFFSET		((1024<<10) - (CFG_NAND_BLOCK_SIZE<<1))
#elif !defined(CFG_RAMBOOT)
	#define CFG_ENV_IS_IN_FLASH	1
	#define CFG_ENV_ADDR		(CFG_MONITOR_BASE + 0x40000)
	//Daniel Change
	#define CFG_ENV_SECT_SIZE	0x20000 /* 128K(one sector) for env */
	//Daniel Change
	#define CFG_ENV_SIZE		0x2000

/*
 * FLASH on the Local Bus
 */
#define CFG_FLASH_CFI				/* use the Common Flash Interface */
#define CFG_FLASH_CFI_DRIVER			/* use the CFI driver */
#define CFG_FLASH_BASE		0xFE000000	/* start of FLASH   */
#define CFG_FLASH_SIZE		16		/* flash size in MB */
#define CFG_FLASH_EMPTY_INFO			/* display empty sectors */
#define CFG_FLASH_USE_BUFFER_WRITE		/* buffer up multiple bytes */

#define CFG_FLASH_BR_PRELIM	(CFG_FLASH_BASE |    /* flash Base address */ \
                                (2<<BR_PS_SHIFT) | /* 16 bit port size */ \
                                BR_V)                /* valid */
#define CFG_FLASH_OR_PRELIM	(0xFF000000         /* 16 MByte */ \
                                | OR_GPCM_XACS \
                                | OR_GPCM_SCY_9 \
                                | OR_GPCM_EHTR \
                                | OR_GPCM_EAD)
                                /* 0xFF006FF7   TODO SLOW 16 MB flash size
*/
#define CFG_LBLAWBAR0_PRELIM	CFG_FLASH_BASE	/* window base@flash base */
#define CFG_LBLAWAR0_PRELIM	0x80000017	/* 16 MB window size */

#define CFG_MAX_FLASH_BANKS	1		/* number of banks */
#define CFG_MAX_FLASH_SECT	135		/* sectors per device */

#define CFG_FLASH_ERASE_TOUT	60000	/* Flash Erase Timeout (ms) */
#define CFG_FLASH_WRITE_TOUT	500	/* Flash Write Timeout (ms) */

#define CFG_MONITOR_BASE	TEXT_BASE	/* start of monitor */

/* Address and size of Redundant Environment Sector */

#else
	#define CFG_ENV_IS_NOWHERE	1	/* Store ENV in memory only */
	#define CFG_ENV_ADDR		(CFG_MONITOR_BASE - 0x1000)
	#define CFG_ENV_SIZE		0x2000
#endif

#define CONFIG_LOADS_ECHO	1	/* echo on for serial download */
#define CFG_LOADS_BAUD_CHANGE	1	/* allow baudrate change */

-------------------------------------------------------------------------------

Michael Lawnick wrote:
> 
> rudresh said the following:
>> i'm using u-boot -1.3.0 in MPC8313 evaluation board, it having a NAND ,
>> NOR
>> Flash , u-boot stored in NOR flash. when i do the saveenv , reset command
>> the u-boot is erased. i'm not able to fix  this issue.  help me to fix
>> this
>> issue
> 
> Sounds U-Boot and environment share a flash sector.
> You'll have to give more info for correct diagnostic:
> Flash size, sector size, u-boot start address and size, position of
> environment data and if applicable of redundancy data.
> 
> -- 
> Regards,
> Michael
> 
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
> 
> 

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