Hi Frank,
On Tuesday 04 December 2007, Frank Bruno wrote:
> I am working on a port of u-boot to a PPC440EPx custom board based off of
> the Sequoia reference design.
>
> I have noticed a couple of areas that the stock sequoia u-boot sources
> configure the EBC0 & EBC3 with reserved bits, namely the B0CR with 0xDA000,
> where bits 19:31 are reserved & B0AP with 0x03017200, where bits 9:11 are
> reserved.
You're probably just mixing up the bit notation. MSB is bit 0 and LSB is bit
31. Could it be that you thought it was the other way around?
> I have searched for an ERRATA in the datasheets but do not see anything
> with reference to the EBC peripheral bus.
>
> Can anyone explain why these bits are set? or has the info for their usage?
Please see above. Hope this helps.
Best regards,
Stefan
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