[Qemu-devel] Re: [PATCH 0/4] ppc: Fix PReP emulation

[Alexander Graf]

On 14.12.2010, at 01:49, Andreas Färber wrote:

> Hello,
> 
> Based on an earlier attempt of mine to make OpenBIOS work with -M prep,
> with kind support from Hervé Poussineau here's an initial stab at
> fixing the long-broken PReP emulation and preparing migration from
> abandoned OpenHack'Ware to OpenBIOS as default FOSS firmware.
> 
> In particular a number of hw_error()s are resolved, so that the BIOS
> can be entered at all. It is not yet working in terms of serial and
> VGA support etc.
> 
> This series is also available from:
> 
> git://repo.or.cz/qemu/afaerber.git prep-queue
> 
> Some more work-in-progress for the curious is on my prep branch [2].
> The corresponding work-in-progress OpenBIOS changes are at [3].
> 
> Unfortunately the prep machine is lacking documentation what exactly it
> tries to emulate. The plan thus is to merge emulation of a second, real
> IBM 40p machine based on Hervé's work at [1], for use with original
> binary firmware.
> 
> Also upcoming are new ppc_chrp machines, forked from ppc_newworld,
> emulating the 970-based IBM JS20 (using Apple U3) [4] and possibly the
> POWER5-based IntelliStation 285. These depend on the ongoing ppc64 port
> of OpenBIOS to be completed though. This relates to PReP in that the
> machine IDs will need to be coordinated.

Does this series actually make anything work, or is it just a first step set to 
get your development rolling? IOW, would users benefit from having the patches 
upstream yet?


Alex