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Date:      Mon, 24 Jan 2000 12:06:30 -0700
From:      Warner Losh <imp@village.org>
To:        Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
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:  <200001241906.MAA05119@harmony.village.org>
In-Reply-To: Your message of "Mon, 24 Jan 2000 19:58:03 %2B0100." <20000124195803.C4731@daemon.ninth-circle.org> 
References:  <20000124195803.C4731@daemon.ninth-circle.org>  <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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In message <20000124195803.C4731@daemon.ninth-circle.org> Jeroen Ruigrok/Asmodai writes:
: 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. =)

Yes.  Looking at the bus.h in NetBSD/i386 I see:

#if 0	/* Cause a link error for bus_space_read_8 */
#define	bus_space_read_8(t, h, o)	!!! bus_space_read_8 unimplemented !!!
#endif

The Netbsd/alpha version appears to have it defined.  Makes sense when
you think about it.

Warner


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