Date: Thu, 13 May 2004 03:30:00 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Bruce Evans <bde@zeta.org.au> Cc: Roman Kurakin <rik@cronyx.ru> Subject: Re: Sio & Puc memory mapped Message-ID: <20040513012959.GS70900@cicely12.cicely.de> In-Reply-To: <20040513054339.E13728@gamplex.bde.org> References: <40A26162.9030607@cronyx.ru> <20040513054339.E13728@gamplex.bde.org>
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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@bwct.de info@bwct.de
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