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Date: Wed, 19 Nov 2008 10:05:08 -0600
From: Scott Wood <scottwood@freescale.com>
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To: jay_chen <jay_chen@alphanetworks.com>
Subject: Re: MPC8349 DMA
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jay_chen wrote:
> Thanks for your help.
> Could you give some hints about how to  "map your memory as
> coherence-required"?

The M bit needs to be set in the BATs and PTEs.  Current kernels do 
this; I don't know about really old ones such as 2.6.14.

-Scott