Date: Mon, 24 Jan 2000 19:58:03 +0100 From: Jeroen Ruigrok/Asmodai <asmodai@wxs.nl> To: Warner Losh <imp@village.org> Cc: "Daniel C. Sobral" <dcs@newsguy.com>, Bill Maniatty <maniattb@cs.rpi.edu>, FreeBSD-doc@FreeBSD.ORG, maniatty@cs.albany.edu, freebsd-hackers@FreeBSD.ORG, Greg Lehey <grog@lemis.com> Subject: Re: Learning the FreeBSD Kernel Message-ID: <20000124195803.C4731@daemon.ninth-circle.org> In-Reply-To: <200001241826.LAA04800@harmony.village.org>; from imp@village.org on Mon, Jan 24, 2000 at 11:26:57AM -0700 References: <20000124161640.F691@daemon.ninth-circle.org> <200001231648.LAA53658@cs.rpi.edu> <388C0FED.706330D0@newsguy.com> <20000124161640.F691@daemon.ninth-circle.org> <200001241826.LAA04800@harmony.village.org>
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-On [20000124 19:55], Warner Losh (imp@village.org) wrote: >In message <20000124161640.F691@daemon.ninth-circle.org> Jeroen Ruigrok/Asmodai writes: >: >As long as a device is just inb/outb (I seem to recall newbus have a >: >replacement for these) >: >: bus_space_read_#() / bus_space_write_#() >: >: Where # is 1, 2, 4, or 8. But I don't think we support atomic 8 byte >: atomic reads and writes. > >It isn't so much that "we" don't support atomic 8 byte operations, it >is that the busses and cpus don't support these operations... Sorry, mea culpa. It's just that I have been shifting back and forth between NetBSD and FreeBSD and that I see they have bus_space_[read|write]_8 defined and we don't. So my statement was actually more in reflection to NetBSD's support of it. Whether or not they support busses which do 8 byte atomic reads/writes I am not sure of. Thanks for the reality adjustment Warner. =) -- Jeroen Ruigrok vd W/Asmodai asmodai@[wxs.nl|bart.nl|freebsd.org] Documentation nutter/B-rated Coder BSD: Technical excellence at its best The BSD Programmer's Documentation Project <http://home.wxs.nl/~asmodai>; Woe to the vanquished! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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