Re: Sio & Puc memory mapped

On Thu, May 13, 2004 at 03:30:00AM +0200, Bernd Walter wrote:
> On Thu, May 13, 2004 at 05:48:55AM +1000, Bruce Evans wrote:
> > On Wed, 12 May 2004, Roman Kurakin wrote:
> > 
> > >     Does any body workin on support for memory mapped serial adapters?
> > > As I understand puc (4) allows to add support for such card, but sio (4)
> > > cant
> > > serve them any way.
> > >     If nobody doesn't, why so? If no one of developers bother, does anybody
> > > wants this support?
> > 
> > There is little need for it, because it is normal for pci 16550 cards to
> > have i/o-mapped memory (possibly both memory-mapped and i/o mapped).
> 
> alphas don't setup i/o space behind PCI-PCI bridges.
> Not that I've ever seen a bridged puc card and I'm not aware of any
> alpha with onboard PCI-PCI bridges.

Hm, I'm pretty sure AS1000A and AS2100A have them.

> Having io space is optionaly acording to PCI specs anyway and cards as
> well as drivers (at least architecture idependent) shouldn't rely on
> that.
> 
> -- 
> B.Walter                   BWCT                http://www.bwct.de
> bernd_at_bwct.de                                  info_at_bwct.de
> 
> _______________________________________________
> freebsd-current_at_freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"
---end of quoted text---

-- 
Wilko Bulte				wilko_at_FreeBSD.org