[U-Boot] Random problem on MPC8640D based board

[Wolfgang Denk]

Dear "Thirumalai",

In message <0C0A8ED2EDFB487097801B3175C0F2CD at itd210> you wrote:
>
> Sorry. Trap 200 is Machine check exception. Also sometimes we are getting 
> TRAP 300 which is DSI exception.

It doesn't really matter which exception you are seeing. Fact is the
system is not running stable. Culprit # 1 in such situations is the
RAM not working stable.

> > Did you try booting Linux on that board?  Let me guess: if you tried,
> > it crashed, right?
> 
> No. It is not crashing. Linux is booting on this board successfully. Its a 
> random issue.

How do you run Linux? Did you try running with root file system
mounted over NFS, and adding some real load, like compiling some
sources?

> > I recommend to check the RAM initialization sequence. I bet you see
> > memory corruption effects.
> 
> What you meant for memory corruption effects?

I mean that your RAm is not working reliably. See the FAQ:
http://www.denx.de/wiki/view/DULG/UBootCrashAfterRelocation

Best regards,

Wolfgang Denk

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