dma at ebus

[Chris Ross <cross+netbsd%distal.com@localhost>]

  So, in working on my X1 some more, I notice that the GENERIC kernel  
has a "dma* at sbus?", presumedly solely for the "esp* at dma?".  And,  
my Sun Netra X1 has a dma at ebus that is "not configured".

  Is the dma reported by the OBP not nearly the same as the "dma* at  
sbus?"?  Or, it is just that there's no need for it, so no one adapted  
the driver to attach it?

  Thanks...

               - Chris