On 08/04/2010 04:52 PM, Anthony Liguori wrote:
This is not like DMA event if done in chunks and chunks can be pretty
big. The code that dials with copying may temporary unmap some pci
devices to have more space there.
That's a bit complicated because SeaBIOS is managing the PCI devices
whereas the kernel code is running as an option rom. I don't know the
BIOS PCI interfaces well so I don't know how doable this is.
Maybe we're just being too fancy here.
We could rewrite -kernel/-append/-initrd to just generate a floppy
image in RAM, and just boot from floppy.
How could this work? the RAM belongs to SeaBIOS immediately after
reset, it would just scribble over it. Or worse, not scribble on it
until some date in the future.
-kernel data has to find its way to memory after the bios gives control
to some optionrom. An alternative would be to embed knowledge of
-kernel in seabios, but I don't think it's a good one.
--
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