[U-Boot] problem with mpc837x start.S

[Scott Wood]

On Tue, 2 Aug 2011 04:11:25 +0000
shawn Bai <programassem at hotmail.com> wrote:

> > When flash is enlarged to 4GiB, it repeats throughout the address space.
> 
> After flash is enlarged to 4GiB, why will it repeat through the address space? the whole 4GiB address space?How does it happen?

It's just how the hardware works -- the flash chip only sees the address
bits that are relevant to its size.  The higher address lines can be
anything, as long as they cause the transaction to be routed to the
flash chip.

-Scott