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RE: MPC8260 cache patch
On Fri, 2003-03-28 at 07:43, Robin Farine wrote:
> On Fri, 2003-03-28 at 15:18, Patrick Doyle wrote:
>
> > On the 8260 port to our specific board, I believe that all of the BAT
> > registers are in use, so creating an alias to existing memory might not be
> > possible, but that could be another solution for other boards.
>
> Ah, now I understand, this CPU doesn't have a paged MMU but a few
> registers to map big segments. One candidate to remove from the list for
> future designs, thanks for the info :)
Don't be so hasty! The PowerPC *does* have a full MMU, but it also
has much simpler mapping mechanisms which we use for eCos that are
lighter and easier to use.
--
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Gary Thomas |
MLB Associates | Consulting for the
+1 (970) 229-1963 | Embedded world
http://www.mlbassoc.com/ |
email: <gary at mlbassoc dot com> |
gpg: http://www.chez-thomas.org/gary/gpg_key.asc
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