On Thursday, August 14, 2003, at 06:24 PM, Allen Briggs wrote:
>> Re: Making COHERENT required: yes.  I think this has to be done; I
>> think the existing specification is defective.
>
> I'm thinking that I agree with you, but I'm not quite clear on how
> BUS_DMA_COHERENT should be defined in this case.

To me, BUS_DMA_COHERENT is used on maps that are concurrently read and 
written without re-mapping.  Of course, having BUS_DMA_READ, 
BUS_DMA_WRITE, and BUS_DMA_READWRITE might be more useful
-- 
Matt Thomas                     email: matt@3am-software.com
3am Software Foundry              www: 
http://3am-software.com/bio/matt/ Cupertino, CA              
disclaimer: I avow all knowledge of this message.