Date: Tue, 14 Dec 2004 09:23:31 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Scott Long <scottl@freebsd.org> Cc: cvs-src@freebsd.org Subject: Re: cvs commit: src/sys/i386/pci pci_cfgreg.c Message-ID: <20041214172331.GA1581@dragon.nuxi.com> In-Reply-To: <41BE6165.7070306@freebsd.org> References: <200412060827.iB68RAmE058040@repoman.freebsd.org> <200412131416.54087.peter@wemm.org> <20041214013304.GB3352@dragon.nuxi.com> <200412131939.46695.peter@wemm.org> <41BE6165.7070306@freebsd.org>
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On Mon, Dec 13, 2004 at 08:43:33PM -0700, Scott Long wrote: > Peter Wemm wrote: > >On that note, we still barely support anything more from AMD's platform > >than the basic instruction set due to lack of documentation.. That's > >why FreeBSD/amd64 ran so quickly on the Intel hardware. We only used > >the most basic features of the generic instruction set in an otherwise > >PC platform. We don't take advantage of the IOMMU, the timers, etc. > >(Still no documentation). I'd have expected AMD to push as hard as > >they can to get every advantage while Intel is still trying to recover > >their balance. > > Having IOMMU docs could have a very positive benefit for things like ATA > on amd64. However, I can't even begin to evaluate what that benefit > might be until docs become available. Beyond http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_739_9004,00.html http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_739_9003,00.html http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_739_7044,00.html what docs do you want? -- -- David (obrien@FreeBSD.org)
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