Messages in this thread |  | | | Date | Mon, 27 Apr 2009 13:00:09 -0700 | | From | David Hawkins <> | | Subject | Re: [PATCH] fsldma: use PCI Read Multiple command |
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>> Can you give me an example of non-PCI memory that would be >> non-prefetchable that you'd like us to try? We can see if our >> host CPUs have an area like that ... we just need to know >> what device to look for first :) > > You can mark the pci inbound window on the 83xx as non-prefetchable > (assuming 83xx is host). On a x86 host I doubt there is any easy way to > get non-prefetchable memory.
Yep, we were going to do that, but chose to use the 1MB region already setup for the IMMRs since its already marked as non-prefetchable. We were only doing reads, so it wasn't going to hurt anything.
I doubt that marking one of the other BAR regions as non-prefetchable will give a different result. However, we're more than happy to double-check if you'd like.
Cheers, Dave
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