[U-Boot-Users] [PATCH][RFC] lib_ppc: make the flush_cache stronger

[Wolfgang Denk]

In message <1209119284.3656.5.camel at localhost.localdomain> you wrote:
>
> > On which processors did you test the changes? I have some unclear
> > memories of dcbf having problems on for example MPC8xx ?
> 
> on 83xx parts.
> I remember the 601 processor not support the dcbf.

OK, so cannot use the patch you suggested.

> > > We have two options:
> > >
> > > 1. Separate functions for them like linux kernel.
> > >    A. clean dcache (dcbst) for DMA_TO_DEVICE
> > >    B. invalidate dcache (dcbi) for DMA_FROM_DEVICE
> > >    C. flush dcache (dcbf) for DMA_BIDIRECTIONAL.
> > > 2. Make current flush_cache stronger semanctic.
> > >    use the dcbf instead of dcbst.
> > >
> > > Which one is better? or you have better option?
> > > Please suggest.
> > 
> > We discussed this a bit on IRC; Kumar suggested to go for 1., and I
> > agree.
> 
> Where is the IRC? Could you point it to me?

That's #u-boot at irc.freenode.org

Best regards,

Wolfgang Denk

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