VMA of processes and CPU registers

[mindentropy]

On Thursday 21 Apr 2011 6:52:29 am Dave Hylands wrote:
> Hi,
> 
> On Wed, Apr 20, 2011 at 11:08 AM, mindentropy <mindentropy at gmail.com> wrote:
> > On Wednesday 20 Apr 2011 11:00:17 pm Dave Hylands wrote:
> >> I think that this is true for all of the architectures I've worked
> >> with (ARM, MIPS, x86). Some architectures (like MIPS) have a
> >> combination of spaces which are linearly mapped between virtual and
> >> physical, and mapped spaces (which go through an MMU).
> > 
> > Is this just identity mapping or does it bypass the paging unit for some
> > addresses? Just out of curiosity how do you tell the bypassing info?
> 
> On the MIPS core I was working with (which I think was R3000 based),
> they use the upper 2 or 3 bits of the address to determine the type of
> access.
> 
> This page has the details (the table about 1/3 of the way down the web
> page):
> <http://tams-www.informatik.uni-hamburg.de/applets/hades/webdemos/mips.htm
> l>
Thanks for the info. Never knew about this.