Re: [PATCH 3/4] myri10ge - Driver core

Benjamin Herrenschmidt
2006-05-25T07:57:20Z

On Wed, 2006-05-24 at 01:39 +1000, Anton Blanchard wrote:

> > +#ifdef CONFIG_MTRR
> > + mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
> > + MTRR_TYPE_WRCOMB, 1);
> > +#endif
> ...
> > + mgp->sram = ioremap(mgp->iomem_base, mgp->board_span);
>
> Not sure how we are meant to specify write through in drivers. Any ideas Ben?

No proper interface exposed, he'll have to do an #ifdef powerpc here or
such and use __ioremap with explicit page attributes. I have a hack to
do that automatically for memory covered by prefetchable PCI BARs when
mmap'ing from userland but not for kernel ioremap.

Ben.