Date: Wed, 15 Dec 2004 23:03:39 +0100 From: Andre Oppermann <andre@freebsd.org> To: obrien@freebsd.org Cc: Dag-Erling Sm?rgrav <des@des.no> Subject: Re: cvs commit: src/sys/i386/pci pci_cfgreg.c Message-ID: <41C0B4BB.7AC10459@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> <20041214172331.GA1581@dragon.nuxi.com>
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David O'Brien wrote: > > 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 The HPET (High Precision Event Timer) looks really cool and has real 32bit counters generating time event interrupts! Nice nice! (AMD-8111 Hyper- transport I/O Hub Data Sheet, Section 3.4.4) > 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? -- Andre
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