Date: Thu, 12 Feb 2009 12:08:54 +0000 (GMT) From: Robert Watson <rwatson@FreeBSD.org> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-hackers@FreeBSD.org Subject: Re: userland driver? Message-ID: <alpine.BSF.2.00.0902121207460.99303@fledge.watson.org> In-Reply-To: <4992DD6B.3050507@icyb.net.ua> References: <4992DD6B.3050507@icyb.net.ua>
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On Wed, 11 Feb 2009, Andriy Gapon wrote: > has anybody tried anything in the area of userland drivers on FreeBSD? I > mean a driver for something sufficiently simple and standalone and not > driven by interrupts. E.g. some sort of a watchdog driver that simply > reads/writes some io registers from time to time. > > Brute-force and a very bad way is to go through /dev/mem, /dev/io, /dev/pci, > but I am thinking about something that would allow to plug into newbus > framework from userland. I recently had a related question from a colleague about implementing a synthetic USB device in userspace so that software part development can occur concurrently with hardware part development. Robert N M Watson Computer Laboratory University of Cambridge
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