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Re: [Qemu-devel] PPC emulation on Qemu

From: J. Mayer
Subject: Re: [Qemu-devel] PPC emulation on Qemu
Date: Mon, 16 Feb 2004 04:34:35 +0100

On Sun, 2004-02-15 at 23:44, Benjamin Herrenschmidt wrote:
> On Mon, 2004-02-16 at 03:06, J. Mayer wrote:
> > On Sun, 2004-02-15 at 15:59, Gabriel Ebner wrote:
> > > Hello,
> > > 
> > > Am Son, den 15.02.2004 schrieb J. Mayer um 15:07:
> > > > We can't boot any PPC OS with qemu for now.
> > > > I'm sorry you'll have to be patient...
> > > 
> > > I have heard on this list that you're working on that, the website says
> > > that PPC system emulation is in development, but I couldn't find any
> > > code in qemu CVS.
> > > 
> > > Just curious, but is there already any code?
> > 
> > The code to emulate supervisor mode and MMU is mostly commited. But the
> > code to handle peripherals, emulate open-firmware (which is a poor
> > approch, but...) and really launch a linux kernel isn't really usable
> > for now.
> Did you use some of MOL's code ? (MacOnLinus contains OF client
> interface emulation and some low level Mac hw emulation like interrupt
> controller, PCI host bridge, etc...)

Well, I did look a lot MOL code but didn't use it for now. I won't reuse
MOL OF code, because I don't want to have hardcoded stuffs, but
something that acts really like the open-firmware and will be able to
boot any OS, just like Bochs BIOS does for PC's.
But emulated hardware from MOL will be helpfull someday. For now, I want
to concentrate on booting Linux for Prep hardware. Because it's mainly a
PC with a PPC CPU, it's a real good target to debug CPU emulation
problems without taking care of emulated hardware. Then, I want a
standard and nowedays PPC platform, not only Macs, near OpenPPC
standard. So I did an open-pic emulation, ... MOL code will be helpfull
to emulate some Mac platforms, but as it says, it seems to me that's
it's too much Mac & MacOS dedicated to help until I got full stable

J. Mayer <address@hidden>
Never organized

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