Re: CVS commit: src

[Antti Kantee <pooka%NetBSD.org@localhost>]

On Wed Jan 26 2011 at 19:48:52 +0900, Izumi Tsutsui wrote:
> > > > + * Make a kernel mapping valid for I/O, e.g. non-cachable.
> > > > + * Alignment and length constraints are as-if NBPG==PAGE_SIZE.
>  :
> > > What is this miracle, however?
> > 
> > IIRC that miracle is about mapping the flash which is not in kseg1.
> > The story included lots of details on how mapping an arbitrary physical
> > address was much easier on Mach ;)
> 
> Why not simply using bus_space(9) for non-cachable I/O?
> (like sys/arch/arc/arc/bus_space_sparse.c)

I think the reason for not using was bus space was the lack of an MI
tag for physmem.  That said, I don't mind if someone wants to convert
the driver to dance around bus space or do other kinds of maintenance.

-- 
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