[Qemu-devel] PowerPC system emulation status

[Qemu-devel] PowerPC system emulation status

[nldudok1]

Can anybody (Jocelyn ?) tell me the status and availability of the 
powerpc system emulation?

I have been trying for a long time to run a powerpc kernel on a x86 machine.
A few years back I used psim but never got further than a ppc netbsd 
kernel booting and crashing halfwaydown (linux kernel crashing too)
The problems. Understanding and making a working openfirmware devicetree
How to boot a kernel and putting it in the right space in memory.
How to get a working console and network.

Now I am trying to use the powerpc system emulation in Qemu to try to 
run a powerpc linux in it but I am running into similar problems.

I found out there is not yet a powerpcbios and tried to use the 
openfirmware image and linux kernel from my rs6000 ( a 7043-140 prep 
machine running debian)
(IBM openfirmware for rs6000 machines can be downloaded at 
http://techsupport.services.ibm.com/server/mdownload/download.html)
I tried changing the sources to get it to load and run the firmware or 
linux kernel but didn't succeed.
I disabled running the vga bios because I thought that was one of the 
problems but that didn't help.
 > Current PPC system emulation status is: I can launch Linux and a 
shell in it and use it. That's all.
Is there a way to get these patches so I can try this too or have you 
already merged it with Fabrice's commits?

With a little luck some day Qemu should be able to run a linux kernel 
and a complete partition dump of my rs6000 prep debianppc installation.
(This would include a working mac-on-linux ;-)

 > For now, I use PREP, because my first goal is to eliminate PPC CPU 
emulation bugs. As PREP is nearly a PC with a PPC CPU, I can re-use 
current Qemu hardware emulation, which make things simpler... The only 
thing I got for recent Mac emulation is OpenPIC (good start).
Good enough for me.

Greetings,
Martin

Re: [Qemu-devel] PowerPC system emulation status

[Jocelyn Mayer]

On Thu, 2004-04-01 at 22:42, nldudok1 wrote:
> Can anybody (Jocelyn ?) tell me the status and availability of the 
> powerpc system emulation?

Hi,

for now, I'm fighting to merge latest changes from CVS.
I want to submit a big set of patches for next qemu version...
Current CVS cannot launch PPC systems.

> I found out there is not yet a powerpcbios and tried to use the 
> openfirmware image and linux kernel from my rs6000 ( a 7043-140 prep 
> machine running debian)
> (IBM openfirmware for rs6000 machines can be downloaded at 
> http://techsupport.services.ibm.com/server/mdownload/download.html)

Thanks for this tip !
I fetched the whole CDROM, and I'll try to add a correct OpenBIOS loader
as soon as possible.

> With a little luck some day Qemu should be able to run a linux kernel 
> and a complete partition dump of my rs6000 prep debianppc installation.
> (This would include a working mac-on-linux ;-)

Yes, this will be possible when the MMU emulation will be fixed.
I still have some crashes when my initial shell forks, so it's quite
"difficult" to launch a real distribution.
Could you build a tiny system disks for me to test more on your PREP
machine ?
I'd like to be have a static busybox disk and a dynamic one.
For now, I build cross-compiled images and this can be another source
of problems...
I'd also like to have a real kernel configuration for PREP.
I did some 2.4 & 2.6 kernel, intuiting parameters, but I'd like to know
what is correct on a real machine and see if I missed some hw parameters
on my emulated hardware.

-- 
Jocelyn Mayer <l_indien@magic.fr>
Never organized