Date: Sun, 14 Dec 1997 17:21:39 -0800 From: John-Mark Gurney <gurney_j@efn.org> To: Chris Csanady <ccsanady@bob.scl.ameslab.gov> Cc: hackers@FreeBSD.ORG Subject: Re: Bus/Processor specific I/O methods - was Re: Beginning SPARC port Message-ID: <19971214172139.05704@hydrogen.nike.efn.org> In-Reply-To: <199712150045.SAA14933@bob.scl.ameslab.gov>; from Chris Csanady on Sun, Dec 14, 1997 at 06:45:56PM -0600 References: <199712141846.LAA10029@pluto.plutotech.com> <199712150045.SAA14933@bob.scl.ameslab.gov>
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Chris Csanady scribbled this message on Dec 14: > 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 I agree, I'll take a look... but the last time I looked at it, there wasn't any way to let a device add a resource for use by other devices on the bus... which is a serious limitation IMO... I do plan on using their extent routines for resource tracking... > more portable would especially be nice.. so I think that this issue > definately deserves more thought. well.. that's what I've been doing for the past two and a half months.. and I'm posted a number of messages for people to comment on my design for the new bus/device code... please look at: http://resnet.uoregon.edu:6971/~jmg/FreeBSD/busdevice.html to see what I'm doing with it... any comments would be welcome, I've recieved very few, so I assume no one has any problems with it yet... -- John-Mark Gurney Modem/FAX: +1 541 683 6954 Cu Networking Live in Peace, destroy Micro$oft, support free software, run FreeBSD
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