On Mon, May 2, 2011 at 5:01 PM, Russell King - ARM Linux <[email protected]> wrote: > On Mon, May 02, 2011 at 09:50:11PM +0000, [email protected] wrote: >> Seems easy enough assuming we don't need the SCU early for the core count >> and can get that from the device tree. > > Beware. Things may not be that trivial when you start considering some > of the weirdnesses that some vendors start coming out with. > >> Since the SCU and part of the GIC end up in the same 4K page they need to be >> together (unless I'm thinking about that wrong). >> >> SCU 0xF8000000 >> GIC_CPU 0xF8000100 >> GIC_DIS 0xF8001000 > > It is preferable to use the same mapping, as it ensures that you're not > going to create incompatible aliases. > > But, before we get too bogged down with this, please realise that it is > possible to setup early mappings from the device tree for things like the > SCU. Maybe not using ioremap(), but I'm sure we can find some way to use > the iotable_init() stuff to setup some early mappings from DT for this > stuff.
absolutely. g. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
