On Sun, Dec 8, 2013 at 1:17 PM, Ingo Jürgensmann <i...@2013.bluespice.org> 
wrote:
> This means that the kernel would be located in the slow ZorroIII memory 
> (256M), which should be avoided in the long run. We need support for 
> SPARSEMEM and priority of mem chunks as in AmigaOS, i.e. memory chunk with 
> highest priority should be preferred first.
>
> The next steps would be:
> - start SPARSEMEM support in kernel

Yep.

> - find out if we need a new amiboot

I'd really like to avoid the need for a new amiboot.
You would only need a new amiboot when extending the passed bootinfo.

Amiboot already has memfile support, so you can specify the order of the
memory chunks. What's "missing" is a way to specify memory chunk priorities.
A naive method is to just assume the first chunk has the highest priority
(but you probably don't want that on Atari, where ST-RAM would be the first
chunk by default).
Alternatively, it could be done automatically, by the kernel measuring read
(and/or write) performance of the different memory chunks in a loop similar
to the delay loop calibration.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@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


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