Date: Wed, 25 Sep 1996 18:20:04 -0700 From: erich@uruk.org To: Chuck Robey <chuckr@Glue.umd.edu> Cc: Dayton Clark <dayton@sci.brooklyn.cuny.edu>, freebsd-smp@freebsd.org, Steve Price <sprice@hiwaay.net> Subject: FreeBSD-SMP and Pentium Pro (was -> Re: QuadPro Motherboard) Message-ID: <199609260120.SAA17253@uruk.org> In-Reply-To: Your message of "Wed, 25 Sep 1996 20:01:39 EDT." <Pine.OSF.3.95.960925195729.7387A-100000@skipper.eng.umd.edu>
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Chuck Robey <chuckr@Glue.umd.edu> writes: > On Wed, 25 Sep 1996 erich@uruk.org wrote: > > > > > Dayton Clark <dayton@sci.brooklyn.cuny.edu> writes: > > > > > We've got an attractive quote on 4CPU systems with QuadPro > > > motherboards which use the Orion chipset. I plan to try Freebsd-SMP > > > on one of them, at least for awhile. > > > > Uhh... as far as I know, no P6 motherboard will work with FreeBSD-SMP. > > Oh, really? I have been tottering on the edge, about ready to buy a new > motherboard exclusively for running FreeBSD-smp, and I was thinking PPro, > because I always upgrade as current as I can. Then PPro smp boards are > out? I'm NOT a kernel hacker, I'm not capable of figuring out and fixing > such bugs myself (altho I'd get the board and run tests forever, if anyone > else wanted to help). I'd even get the board and loan it out for a month > or two, while someone more knowledgeable fixed things. But if it doesn't > run at all, well .... Wow, I didn't think I'd cause this kind of widespread panic ;-) Seriously, though... this isn't a huge show-stopper by any means. There are 2 things necessary to fix working with most P6 systems: -- Changing the local APIC to a variable (right now it is hard-coded), or simply changing the page address it is mapped at to take this into account. -- For many dual-P6 motherboards, support booting off of a CPU local APIC which is != 0. Many P6 motherboards have the boot CPU as #1, and the secondary CPU as #0. This might be harder to fix. BTW, I'll have a finished "generic" startup sequence available in a few days on my web site. It is similar to but somewhat more generic than the Linux-SMP CPU startup code. -- Erich Stefan Boleyn \_ E-mail (preferred): <erich@uruk.org> Mad Genius wanna-be, CyberMuffin \__ (finger me for other stats) Web: http://www.uruk.org/~erich/ Motto: "I'll live forever or die trying"
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