[Qemu-devel] Simtec BAST emulation

[Daniel Silverstone]

Hi,

Myself and my colleagues have worked hard and produced a new system
emulation for qemu for the Simtec BAST board.

The BAST is a Samsung 2410 based board (ARM 9 based SoC, with MMU) with
various peripherals including a Davicom DM9000 Ethernet port.

The emulation is complete enough to start Simtec's ABLE boot loader
(downloadable from www.simtec.co.uk) and also is capable of being
direct-booted with a linux kernel/initrd combination as per the
versatile etc.

Among other things, the patch needs to add support for OHCI USB systems
not on PCI, ARM systems where SDRAM isn't at 0 (phys) and MMIO based
IDE. Naturally this has all been done as generically as made sense at
the time.

There is one generic fix in the patch which hardly seemed worth breaking
out on its own. It corrects a bug where QEMU would ignore WIN_DIAGNOSE's
behaviour for normal drives. It assumed HDDs behaved as CDROMs under
WIN_DIAGNOSE which is not the case.

Unfortunately I was unable to sensibly separate the patch up because of
the difficulties which stem from qemu's current source layout. E.g. it
was hard to split out the MMIO IDE from the rest of the IDE without
dramatically changing the exported symbol lists.

Hopefully you'll be happy with the whole patch. In particular I've tried
to isolate the s3c2410x stuff away from the BAST stuff, so that in
future other 2410x based systems such as the H1940 PDA or the FIC NEO
1973 (openmoko?) can be implemented with minimal fuss.

We have a partially complete s3c2410x NAND driver, a partial LCD driver
and various other bits which we will submit as and when we have them
done.

Some of the peripherals don't correctly save/restore their state as of
yet, but as the patch was getting larger and larger I felt it safer to
offer this now and to produce those as fix patches once the bulk of the
code was in place.

I trust that the work is of a sufficiently high standard to be included
in the mainline codebase and I'd be happy to either continue to sub
patches through the list, or if you are happy with our work, I'd love to
have CVS commit access for this stuff going forward.

Regards,

Daniel Silverstone.

-- 
Daniel Silverstone                              http://www.simtec.co.uk/
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simtec-bast.diff.gz
Description: Simtec BAST implementation for QEMU