Subject: Re: user mapping pci memory
To: None <eeh@one-o.com, gwr@mc.com>
From: Kevin Van Maren <vanmaren@fast.cs.utah.edu>
List: tech-kern
Date: 03/13/1997 10:15:42 
> On some machines it is quite possible that the physical address exceeds
> the size of the virtual address space.  As mentioned above, the SPARC v8
> physical address logically includes an 8-bit ASI (address space
> identifier) which means that they have a 40-bit physical address, but
> 32-bit virtual addresses.

Also, the Pentium Pro has 36-bit PAs, but still 32-bit VAs.