On Tue, Sep 11, 2007 at 09:10:20AM +1000, Paul Mackerras wrote:
> Olof Johansson writes:
>
> > electra_cf uses it, that driver is currently in -mm including below
> > update to use benh's rewritten interfaces:
> >
> > http://patchwork.ozlabs.org/linuxppc/patch?id=13237
> >
> > It gets the effective addresses to use out of the device tree.
>
> Huh? What does firmware (or the device tree) know about how the
> kernel uses effective addresses?
Oh, sorry, of course it doesn't (I was thinking of the physical address
but writing effective).
I get effective address by allocating it with __get_vm_area same way
the pseries pci hotplug does:
area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
if (area == NULL)
return -ENOMEM;
cf->io_virt = (void __iomem *)(area->addr);
-Olof
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