[U-Boot-Users] fishing for ideas

[Tadas <tpt@pupa.da.ru>]

I had similar problem, and it was because of sdram
try to test memory somehow, fill with NOT THE SAME BYTES
and test it. probably memory test command should work.
I expect incorrect bank size

You can easy check if it is ubot fault.
just upload the same file with jtag debugger and you will see if there is
difference.


----- Original Message ----- 
From: "Benjamin Collar" <benjamin.collar@siemens.com>
To: <u-boot-users@lists.sourceforge.net>
Sent: Friday, October 01, 2004 7:03 PM
Subject: [U-Boot-Users] fishing for ideas


> Greetings folks
>
> Yesterday's problems have been overcome. Mostly I was just
> misunderstanding what was going on / what was supposed to be going on.
> Thanks for the clues overall.
>
> But there is a bit more to it. At the end of the day yesterday, I
> performed exactly the same 'loads' command,  with exactly the same srec
> file, as I had done at the beginning of the day, and it worked. Talk
> about frustration!
>
> Today I was working on it and loaded a linux kernel image. When I
> 'loads' it, using the u-boot command line, into ram, the 'md' command at
> the loaded area shows
>
> 00010000: 27051956 d3232bea 415d1e66 0005ba2c    '..V.#+.A].f...,
> 00010010: 7d8c5a14 3940ffff 914c0000 3bffffe0    }.Z.9 at ...L..;...
> 00010020: 4c696e75 782d322e 342e3138 00000000    Linux-2.4.18....
> 00010030: 00000000 00000000 00000000 00000000    ................
>
> while objdump shows
>
>  00000 27051956 d3232bea 415d1e66 0005ba2c  '..V.#+.A].f...,
>  00010 00000000 00000000 82847f95 05070201  ................
>  00020 4c696e75 782d322e 342e3138 00000000  Linux-2.4.18....
>
> of course, you'll notice immediately that the 5th word is completely
> bogus, among others.
>
> I've spoken with the board developer (who also wrote a bootloader for
> the board) and showed him the sdram initialization function, and he said
> it was correct. However, I've got the behavior shown above. Is there
> another reason why this sort of corruption would happen? (btw, using
> 'cu' to download the image into RAM).
>
> Thanks for any tips
> Ben
>
> -- 
> Benjamin Collar
> Siemens AG
> CT SE 2
> Embedded Linux
> 089-636-53711
>
>
>
>
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