Date: Wed, 6 Sep 1995 12:54:58 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: gibbs@freefall.freebsd.org (Justin T. Gibbs) Cc: hackers@freefall.freebsd.org Subject: Re: Cyrix cache enable patches? Message-ID: <199509061954.MAA00541@phaeton.artisoft.com> In-Reply-To: <199509061746.KAA14927@freefall.freebsd.org> from "Justin T. Gibbs" at Sep 6, 95 10:46:40 am
next in thread | previous in thread | raw e-mail | index | archive | help
> > Did anyone look at integrating these patches? Cyrix doesn't honor the non-cacheable bit. It would be silly to integrate patches to turn it on without integrating detect as a global setting and doing a BINVD when a read is issued to get around it not honoring the non-cacheable bit. You *aren't* going to get a cache update, since the motherboard chipset doesn't notify the chip of a bus mastering DMA causing a cache invalidation to be necessary (no pin on the chip for it). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199509061954.MAA00541>