>    
>    One of the things I'm considering is to change the drivers to access all
>    device registers through the passthrough ASIs so the registers never need
>    to be mapped in.  The problem is that then I would need to rewrite all
>    drivers to properly use the bus_space_{read,write}*() macros for all
>    register accesses.
> 
> 
> 
> problem!?  this would be excellent, not a problem!  :-)


And on that note, I just finished converting isp_sbus- I dunno how it
managed to not have bus_space_XXXX stuff...

I'd wonder about the performance of using ASI's....