Date: Wed, 17 Jan 2001 18:36:16 +0100 From: Robert Drehmel <robert@gizmo.quizbot.org> To: John Baldwin <jhb@FreeBSD.org> Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, current@FreeBSD.org, Peter Jeremy <peter.jeremy@alcatel.com.au> Subject: Re: Atomic breakage? Message-ID: <3A65D810.6304785A@gizmo.quizbot.org> References: <XFMail.010117084010.jhb@FreeBSD.org>
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In <XFMail.010117084010.jhb@FreeBSD.org>, John Baldwin wrote: > Early Pentiums (<= P90) don't support CX8 or so I've heard, which make this > slightly more complicated, as for a pentium we would have to use a function > pointer that we setup during probe. Also, during a SMP boot we would have to > panic if CX8 wasn't enabled on all CPU's. P75 (stepping 5): <FPU,VME,DE,PSE,TSC,MSR,MCE,CX8> cmpxchg8 was actually introduced with the Pentium processors, as Mr. Wollman already wrote. -- Robert S. F. Drehmel <robert@gizmo.quizbot.org> Real hackers run -current from punchcards. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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