[U-Boot] [PATCH] arm: fix memory coherency problem after relocation

[Marek Vasut]

Dear Mike Dunn,

> On the xscale, the icache must be invalidated and the write buffers drained
> after writing code over the data bus, even if the caches are disabled. 
> After rebasing with the main git repository, u-boot began crashing in odd
> places on my pxa270 board (palmtreo680) after the code relocation routine
> ran.  This patch fixes it.  Cache coherency problems are often
> hit-and-miss (ha ha), and this latent problem didn't rear its ugly head
> until now.  Tested on the pxa270.
> 
> Signed-off-by: Mike Dunn <mikedunn at newsguy.com>
> ---
> 
> I realize that __ARM_ARCH_5TE__ does not necessarily mean xscale.

We should introduce some CONFIG_PXA I guess.

Best regards,
Marek Vasut