Sio & Puc memory mapped

[Bernd Walter]

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.
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