busmaster/latency for video

Benjamin Herrenschmidt bh40 at calva.net
Fri Oct 8 20:18:23 EST 1999


On Thu, Oct 7, 1999, Michel Lanners <mlan at cpu.lu> wrote:

>Ah, but in that case Apple's OF should enable bus mastering. If I read
>well between the lines of Apple's docs, OF should set a few default
>parameters on all PCI devices, among which bus mastering. I'm not sure
>about latency, though...

OF tends to ignore devices that don't have an OF expansion ROM. (For
example, it won't enable memory or IO accesses in the command register).
I beleive it won't enable bus mastering neither but I may be wrong.

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