>>> To support the i860 properly, we need a TLB manager and the
>>> right ucode for the damn thing.
>>
>> Special TLB management framework will be required ultimately to
>> support the variety of devices found in Alpha/DECstations (think about
>> R4000 and Alpha TLB)
> 
> NetBSD/mips common code leaves 6 entry of R3000 hard-wired TLBs for no
> purpose.  These can over upto 24KB of memory region.  Are they useful
> with your driver?
>
> I think he means to manage the i860's TLB.  So, this is actually more like
> what you need to do for SGMAP DMA on the Alpha.

Doo, I see I misunderstood.  The doomed i860 has the exactly same VM
machinary as i386, does it? 

Tohru Nishimura
Nara Institute of Science and Technolgy