DMA and Cache coherency on machines without hardware enforced cache

Ralph Blach (rcblach@raleigh.ibm.com)
Wed, 01 Dec 1999 09:21:38 -0500

I have to write a device driver for a machine which does not have
hardware enforced
cache coherency between bus master devices and the CPU caches. Is there
a way to allocate certain buffers in uncached memory. I know this
would lower performance, but it would also solve certain problems which
seem to be cropping up.

Please reply to
rcblach@raleigh.ibm.com

Thanks
Chip

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