[U-Boot] [PATCH 1/2] integratorap: disable dcache

[Heiko Schocher <hs@denx.de>]

Hello Linus,

Linus Walleij wrote:
> On Thu, Jul 14, 2011 at 1:39 PM, Wolfgang Denk <wd@denx.de> wrote:
> 
>> Sorry, but again I have to point out that I really dislike papering
>> over existing bugs.  If the disable D-cache in bootm does not work,
>> _this_ should be analyzed and fixed instead of globally disabling he
>> data cache.
> 
> No problem, I didn't label it as RFC since what it does is actually fix a
> regression.
> 
> At one point U-boot was working on the Integrator and now
> it doesn't, it seems commit 880eff5cfb9df6f0855f4e48affd349ca64692e9
> "ARM: cp15: setup mmu and enable dcache" is causing it.
> 
> Heiko, Alessandro, do you have any hints on how to go about flushing
> and disabling the D-cache in bootm for ARM920T? It doesn't seem to
> work on this ARM CPU chip in its current form...

Hmm.. trying bootm with actual u-boot on a davinci (arm926ejs) based
board, there I couldn;t use the Davinci-EMAC (if I disable the dcache
it works ...)

Seems above commit introduced problems for other arm architectures,
drivers, ...

Hmm... if we globally always enable the dcache, we have a lot of more
drivers to fix (I think) ...

bye,
Heiko
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