Re: Support for MMU-less Atari ST

[Geert Uytterhoeven <geert@linux-m68k.org>]

On Fri, Jun 3, 2011 at 09:43, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Fri, Jun 3, 2011 at 09:04, Greg Ungerer <gerg@snapgear.com> wrote:
>> On 03/06/11 05:25, Matthias Reis wrote:
>>> since the m68k and the m68knommu trees have now been merged, I wonder if
>>> it is possible to run linux on mmu-less 68000 machines like the (original)
>>> Atari ST. I think the first thing to do would be to modify
>>> arch/m68k/kernel/head.S in order to handle non-mmu CPUs. I would be happy to
>>> do some work on this but the problem is that I'm not very familiar with the
>>> kernel so far. It would be nice if someone could tell me which things need
>>> to be done to run linux on a mmu-less Atari ST. I'm not expecting detailed
>>> step-by-step instructions, but rather some hints where the MMU- or
>>> 68020-dependent stuff in the Atari drivers lies.
>
> I worked on getting uClinux running on MMUless Amiga (read: UAE) in
> the 2.6.8.1 era.
> I got it more or less into booting userspace:
> http://www.kernel.org/pub/linux/kernel/people/geert/uClinux-amiga-2.6.x-merging/
>
> Recently, I tried forward porting this to 2.6.39 in the (idle) hope
> converting the Amiga
> code to genirq would be easier while debugging on UAE than on real hardware.
> However, it's not as far yet as the work on 2.6.8.1, but since you're
> interested in
> it, I'll push it out later today.

Just for reference, I pushed it out to
git://git.kernel.org:/pub/scm/linux/kernel/git/geert/linux-m68k.git
uamiga-untested
http://git.kernel.org/?p=linux/kernel/git/geert/linux-m68k.git;a=shortlog;h=refs/heads/uamiga-untested

It's not identical to what I tested, and some work is required to
rebase it to 3.0-rc1, due to
changes in the m68knommu handling.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds