Re: /dev/vme*

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Wed, Feb 13, 2008 at 10:30:34PM +0000, David Laight wrote:
> On Wed, Feb 13, 2008 at 11:12:12PM +0100, Joerg Sonnenberger wrote:
> > Hi all,
> > I'm currently working on merging the MD code for /dev/mem, /dev/kmem,
> > /dev/zero and /dev/null. One of the more interesting uses of the major
> > number is in sun2 and sun3. It has additional minors for vme16d16 and
> > so. I can't find entries in MAKEDEV for those and the code only allows
> > mmapped entry for them.
> > 
> > Does anyone actually use this devices or can the code be removed?
> 
> My guess is that they generate the alternate vmebus bus cycle codes
> needed to access vmebus devices with 16bit address/data regsiters.

They just allow mapping a different range. That could be allowed for
/dev/mem directly as well. That's why I don't see the point in the
additional devices.

Joerg