CPU Cache and busdma usage in USB

[Hans Petter Selasky]

On Monday 29 June 2009 14:16:13 Piotr Zięcik wrote:
> Look for bus_dmamap_sync() sync description, last sentence:
> <cite>
> If read and write operations are not preceded and followed by the
> appropriate synchronization operations, behavior is undefined.
> </cite>

I don't think this is a problem. I do flush read buffers before using them, 
and invalidate them afterwards. Write buffers only get flushed once.

--HPS