At 01:41 PM 12/17/97 -0800, Jason Thorpe wrote:
>On Wed, 17 Dec 1997 14:32:10 +0100 
> Leo Weppelman <leo@wau.mis.ah.nl> wrote:
>
> > Yesterday, I was looking at a contributed driver that contained a line
> > like:
> > 
> >      uiomove((caddr_t)(sc->sc_memt + sc->sc_memh + uio->uio_offset),
> >              length, uio);
> > 
> > obviously, this is not correct. However, what *is* the correct solution
> > here? Should there always be an intermediate copy to a buffer like:
> >      bus_space_read_multi_1(sc->sc_memt, sc->sc_memh, uio->uio_offset,
> >                             buf, length);
> >      uiomove(buf, length, uio);
> > 
> > This is not very efficient.  Am I missing something obvious?
>
>What is the driver?  In any case, with shared memory devices like this,
>you really don't have much of a choice.

I think he's asking for 

	bus_space_uio_multi_1(uio, tag, handle)

(and the obvious dot product).  busdma has uio support and it seems 
reasonable for bus_space to have uio support as well.
-- 
Matt Thomas               Internet:   matt@3am-software.com
3am Software Foundry      WWW URL:    http://www.3am-software.com/bio/matt/
Nashua, NH                Disclaimer: I disavow all knowledge of this message