Should be faster since they explicitly bypass the MMU and don't take TLB
   miss traps.  However, the current scheme using gcc macros is not optimal
   since gcc can't do as good a job at scheduling the instructions.  The best
   solution would be to modify gcc so pointers could be explicitly assocated
   with ASIs.


you mean something like

	void	*foo __attribute__((__ASIXXX___));

?  telling the compiler to generate all instructions with foo with
the appropriate ASI ?  hmm...  shouldn't be too hard to do ?