debugging, kernel port status update

[Dan Malek]

Mark Pilon wrote:

> 0) I built a generic binutils/gcc/glibc for the PPC -- notes
> available.

It's probably easier just to download this from someplace like mvista.com.

> I may have to tweak this compiler if I get FPU support along w/
> instructions which aren't a part of this uP's instruction set.

There should be sufficient options to the compiler that wouldn't
require rebuilding.  I suspect telling it to use a 603 core with 405
instruction scheduling will make it work.  Actually, just a 603
will make it work, the additional scheduling hints may improve
performance.

The bigger challenge is the kernel mofication necessary to properly
context switch the FPU on this part.

> -- the #if 0 portion was what was already in head_4xx.S (w/o the if 0)
> but didn't work. the #else case was taken from head.S and seemed to
> work.

You are working with a really old kernel.  Find a newer one.  I would
recommend the 2_4_devel tree for what you are doing.


	-- Dan

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