[U-Boot-Users] PPC8xx chip select configuration at startup

[Wolfgang Denk]

In message <482F3C06ECF00C44AEC226520C6FCB1A51ECB6 at EXCHANGEVS.HYPERCOM.COM> you wrote:
> 
> My board boots to address 0x0, with FLASH located there.  The desired
> location for FLASH memory will be at 0x0400_0000.  This is the address

I recommend NOT to use such a low address.

> space to which I link U-Boot.  The way I understand U-Boot to work is
> that for PPC8xx platforms, FLASH memory is generally located at address
> 0x0, and CS0 is required to map both address 0x0 and your absolute
> address space (0x0400_0000 in my example) so it can seamlessly jump from

No, this is completely wrong.

> that are contrary to what I require.  What I ended up doing is program
> CS0 base and option registers with what I call 'boot' values, to
> correctly configure OR0 to allow this duplication of address space for

Please read the README. It's all dicumented there.

Best regards,

Wolfgang Denk

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