> Okay, now I'm fairly sure I can do the mapping.  At least with the IO
> page it seems easy.  Apparently it is just at physical address QIOPAGE.
> I think the CSR should be at QIOPAGE+ubdevreg(QDSSCSR) in physical
> memory and that should map to the kernel virtual address I'm using +
> ubdevreg(QDSSCSR)
> 
Sounds quite correct.

> I'm still not sure about mapping the other QDSS memory.  Basically I
> just tell the QDSS the Q-bus address I want it to appear at (actually it
> can only go on 64k boundaries), and then I want to map it into the chunk
> of kernel virtual address space that I have waiting for it.  My
> questions are:
> - Where does the Q-bus address space appear in physical address space? 
> (Is there yet another mapping in there somewhere?)
It appears at QMEM physical address and up 4M. The Qbus map registers
appears at QBAMAP.

> - If I use some of the Q-bus address space here how do I make sure
> something
> else won't try to use it later.
> 
Only the low 1MB in the Qbus address space is actually used by NetBSD.
The space above 1MB are available for whatever you want.

-- Ragge