On Friday 14 June 2013 17:15:33 Chao Xie wrote:
> On Mon, Jun 10, 2013 at 4:35 PM, Arnd Bergmann <a...@arndb.de> wrote:
> > I guess that is a problem we have on other platforms as well, we should
> > find a generic solution for that. It would be nice to reserve a page
> > in "fixmap" and have common code map the SCU page into that.
> >
>
> So you mean that reserve a page in arch/arm/asm/include/fixmap.h?
Yes.
> This reserve will depend on the cpu type beacuse only A9 will have SCU part.
I think A5 and ARM11MPCore as well.
> I do not know that in fixmap, the #ifdef is acceptable or not.
Yes, it is. We don't really use fixmap on ARM for anything other than
kmap_atomic at the moment. Please have a look at the powerpc and x86
implementations.
> For the common code to map the SCU page, where do you suggest to put it?
arch/arm/kernel/smp_scu.c.
Arnd
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