[Qemu-ppc] How to run ppc405ep in ppcemb mode

[Sijia Li]

Hi:

It seems like since the QEMU 1.1, board ref405ep has been moved to 
qemu-system-ppc model, not qemu-system-ppcemb any more. And the timer of 
powerpc 405ep has been changed to booke style timer, not the old 
universal timer. That makes some trouble to me, the old assembly can't 
set the wakeup time to the new timer, so that the timer can interrupt 
the processor in some time .

Is it possible to run ppc405ep in ppcemb mode, so that I could use the 
old timer as before?

Regards
Sijia Li

PS: In some reason, I have to use QEMU 1.5 or higher version, so it's 
impossible to use the old version.