cvs commit: src/sys/i386/pci pci_cfgreg.c

[Andre Oppermann]

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