Subject: Re: user mapping pci memory
To: None <firstname.lastname@example.org, email@example.com>
From: Kevin Van Maren <firstname.lastname@example.org>
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.