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As Izumi-san recently pointed out, there is a problem with my current appro=
ach=20
of conditionalizing the size of paddr_t on 64-bit platforms.  The problem i=
s=20
that LKMs are likely to be impacted.  (Most of the userland tools work fine=
,=20
which was my original concern.)

Therefore, I'd like to follow one of two approaches, and I would like feedb=
ack=20
on which to follow *sooner* rather than later.

Option one: make paddr_t 64-bit on all evbmips platforms (basically modifyi=
n=20
<machine/types.h>).  The current thinking is that this will not adversely=20
impact any "current" hardware that has R4K style MMUs.  What I'm not sure i=
s=20
whether or not there is any desire to include future additional MIPS parts =
in=20
the evbmips port that this would cause a problem for.  Apart from=20
compatibility, there is the concern of increasing the size of the kernel, b=
ut=20
I consider this concern rather negligible.

Option two: separate out the Alchemy parts into a separate port (aumips).  =
The=20
main objection to this, I think, is additional complexity that it would=20
create.    A few kernel bits could be simplified a bit, since at that point=
=20
you don't have to consider e.g. 64-bit procs and compatibility with malta.

I would like to reach a decision on this as soon as possible.  My preferenc=
e=20
is to just change the paddr_t size across the entire evbmips port.
=2D-=20
Garrett D'Amore, Principal Software Engineer
Tadpole Computer / Computing Technologies Division,
General Dynamics C4 Systems
http://www.tadpolecomputer.com/
Phone: 951 325-2134  Fax: 951 325-2191

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