Date: Thu, 13 May 2004 17:04:07 +0400 From: Roman Kurakin <rik@cronyx.ru> To: Bruce Evans <bde@zeta.org.au> Cc: freebsd-current@freebsd.org Subject: Re: Sio & Puc memory mapped Message-ID: <40A37247.5050700@cronyx.ru> In-Reply-To: <20040513054339.E13728@gamplex.bde.org> References: <40A26162.9030607@cronyx.ru> <20040513054339.E13728@gamplex.bde.org>
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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). > > I have one card that is only mem-maped. rik >I have uncommitted changed to use memory-mapped i/o for accessing the data >registers only, since memory mapped i/o tends to be faster. Implementing >memory-mapped i/o more generally is easier. > > >Bruce >_______________________________________________ >freebsd-current@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-current >To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > > > >
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