The mac68k folks are finding that it would be useful to implement
bus_dma(9).  It appears that there are a couple of implementations
already in the m68k space and that there are not _too_ many
differences between them.

What do folks think about creating a common bus_dma in arch/m68k/m68k
which can be used, ignored, or overridden on a MACHINE-by-MACHINE basis?

The ones that exist now are:
	next68k	-- seems pretty complete
	sun68k	-- uses a custom/variable bus_dmamap_load, at least,
		   and seems to leave some things undone
	x68k	-- seems pretty complete

The next68k and x68k seem to differ most in the dmamap_sync function.
Is there a good reason to not unify the two and use it for both as well
as mac68k and any other m68k platform that needs it?  (Perhaps also
allowing for sun2/sun3 to use it?)

-allen

-- 
 Allen Briggs                     briggs@wasabisystems.com
 http://www.wasabisystems.com/    Quality NetBSD CDs, Sales, Support, Service
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