Re: [Qemu-ppc] [Qemu-devel] [PATCH 0/6] ppc: add a IBM 40p machine (RS/6000, PReP)

[Hervé Poussineau]

Le 13/01/2017 à 13:23, Mark Cave-Ayland a écrit :
> > OpenBIOS doesn't support PReP boot partitions (type 0x41) nor PReP
> > kernels so this is a no-go yet.
>
> Just out of interest, is it just the PReP boot partition support that is
> missing from OpenBIOS? If so, that should be fairly easy to implement if
> there's a spec lying around somewhere.

2 things are missing to boot from hard disk/cdrom:
- support for LSI SCSI adapter
- support for PReP boot partition support

However, if you want to boot with -kernel, you only need to have support for 
PReP boot partition.
Partial specification is available at:
ftp://ftp.software.ibm.com/rs6000/technology/spec/srp1_1.exe
section 5.3 (Loading the Load Image)
and
section 5.4 (Transferring System Control to Load Image)


> It would be great if we could finally remove OHW from QEMU :)

I fully agree on that!

Hervé