Re: [Qemu-devel] PowerPC 440 support

[Hollis Blanchard <hollis@penguinppc.org>]

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On Mon, Jun 15, 2009 at 11:52 AM, Blue Swirl <blauwirbel@gmail.com> wrote:

> On 6/15/09, Hollis Blanchard <hollis@penguinppc.org> wrote:
> > KVM PPC execution doesn't use firmware today. Instead we create the
> device
> > tree in qemu itself, stuff it into guest memory, and point a guest
> register
> > at it on entry. This was just a shortcut/hack, because we didn't have
> enough
> > time to enable both Linux and uboot.
> >
> > I agree that the best way to do things long-term is to run u-boot inside
> the
> > guest environment. That will likely require improvements to qemu's device
> > emulation, and also we'll probably need to work out a way for qemu to
> pass
> > parameters (e.g. memory size) to u-boot. IMHO, the best approach there
> would
> > be to have u-boot interpret a device tree from qemu, then modify it and
> pass
> > it on to the kernel. Obviously that will require u-boot work.
>
> I'm not familiar with u-boot, could we use OpenBIOS instead? Is u-boot
> used on real hardware?
>

Yes, u-boot is used on a wide variety of real hardware. Open Firmware is
almost unheard-of in embedded systems.

-Hollis

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