[U-Boot] AMCC 405EX Trap

[Stefan Roese <sr@denx.de>]

On Thursday 30 April 2009, Jonathan Haws wrote:
> I am certain that it is a hardware failure that is causing the machine
> check because I can use the exact same binary on another (identical) board
> and have it boot just fine.  That tells me that all the EBC and SDRAM
> settings are correct;

From my experience you can't be sure that SDRAM setting are "currect" at this 
stage.

> and that I am using the right addresses and chip 
> selects for the data cache.
>
> Currently I am leaning toward an SDRAM problem because I get about a 20
> second pause when U-Boot tries to relocate to RAM.

Yes, I'm pretty sure that you have some SDRAM related problems. Either 
configuration is non-optimal, or even (perhaps more unlikely) a hardware 
problem. I suggest that you re-check the DDR2 autocalibration (method A & B).

Best regards,
Stefan

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