From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marek.vasut@gmail.com>
Date: Tue, 6 Sep 2011 16:24:05 +0200
Subject: [U-Boot] Problems when copying data from flash to ram
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On Tuesday, September 06, 2011 04:05:23 PM philipp zaugg wrote:
> Hello U-booters
> 
> Hopefully someone can help me. I'm working on a tx25 target.
> 
> I need to start my linux system from nand flash. i can load the
> kernel-uImage from tftp and start it directly without any problem. I
> stored the image to the a mtd partition.
> 
> nand write.jffs2 0x81000000 kernel1
> 
> To continue I need to power off the System for a while. The first or the
> first few loadings of the kernel works but afterwards it is not any more
> possible to load the kernel correctly. the following commands have been
> done in one succession
> 
> => nand read 0x81000000 kernel1
> 
> NAND read: device 0 offset 0x80000, size 0x400000
>  4194304 bytes read: OK
> => iminfo
> 
> ## Checking Image at 81000000 ...
>    Legacy image found
>    Image Name:   Linux-2.6.31
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    1812416 Bytes = 1.7 MiB
>    Load Address: 80008000
>    Entry Point:  80008000
>    Verifying Checksum ... OK
> => nand read 0x81000000 kernel1
> 
> NAND read: device 0 offset 0x80000, size 0x400000
>  4194304 bytes read: OK
> => iminfo                     
> 
> ## Checking Image at 81000000 ...
>    Legacy image found
>    Image Name:   Linux-2.6.31
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    1812416 Bytes = 1.7 MiB
>    Load Address: 80008000
>    Entry Point:  80008000
>    Verifying Checksum ...    Bad Data CRC
> =>
> 
> Does anybody have an idea where the problem comes from.

What version of uboot do you use ? btw try ubi/ubifs, might be better than jffs 
on big NAND devices.

Cheers