Date: Mon, 15 Dec 1997 11:45:22 +1030 From: Mike Smith <mike@smith.net.au> To: Chris Csanady <ccsanady@bob.scl.ameslab.gov> Cc: "Justin T. Gibbs" <gibbs@plutotech.com>, John-Mark Gurney <gurney_j@resnet.uoregon.edu>, hackers@freebsd.org Subject: Re: Bus/Processor specific I/O methods - was Re: Beginning SPARC port Message-ID: <199712150115.LAA00275@word.smith.net.au> In-Reply-To: Your message of "Sun, 14 Dec 1997 18:45:56 MDT." <199712150045.SAA14933@bob.scl.ameslab.gov>
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> > FWIW, NetBSD has a couple of nice man pages on their bus stuff. See > bus_space(9) and bus_dma(9). It looks like a well abstracted interface, > and works on several architectures. We really should be looking at ways > to make the BSD's more similar whenever possible. Making the drivers > more portable would especially be nice.. so I think that this issue > definately deserves more thought. The NetBSD 'bus.h' interface has had a lot of time to stabilise, and plenty of performance-sensitive pounding. For all its conceptual difficulty, it *does* appear to be the best way to go. (No insult intended, JMG!) mike
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