Re: [PATCH 3/9] ppc/ppc405: Remove CPU

[Cédric Le Goater]

On 1/14/25 08:11, Nicholas Piggin wrote:
> On Sat Jan 11, 2025 at 2:25 AM AEST, Richard Henderson wrote:
> > On 1/10/25 08:15, Philippe Mathieu-Daudé wrote:
> > > Hi Cédric,
> > >
> > > Cc'ing Laurent & Richard for user emulation.
> > ...
> > > The deprecation message (see previous patch) was about the
> > > "ppc ``ref405ep`` machine". Is that OK we remove these CPUs
> > > for user emulation?
> > >
> > > $ qemu-ppc -cpu help|fgrep 405
> > > PowerPC 405d2            PVR 20010000
> > > PowerPC 405gpa           PVR 40110000
> > > PowerPC 405gpb           PVR 40110040
> > > PowerPC 405cra           PVR 40110041
> > > PowerPC 405gpc           PVR 40110082
> > > PowerPC 405gpd           PVR 401100c4
> > > PowerPC 405gp            (alias for 405gpd)
> > > PowerPC 405crb           PVR 401100c5
> > > PowerPC 405crc           PVR 40110145
> > > PowerPC 405cr            (alias for 405crc)
> > > PowerPC 405gpe           (alias for 405crc)
> > > PowerPC npe405h          PVR 414100c0
> > > PowerPC npe405h2         PVR 41410140
> > > PowerPC 405ez            PVR 41511460
> > > PowerPC npe405l          PVR 416100c0
> > > PowerPC 405d4            PVR 41810000
> > > PowerPC 405              (alias for 405d4)
> > > PowerPC 405lp            PVR 41f10000
> > > PowerPC 405gpr           PVR 50910951
> > > PowerPC 405ep            PVR 51210950
> >
> > Up to the ppc maintainers.  I don't know of anything interesting at the 
> > user-only level
> > wrt these cpus.
>
> Just getting back to things after the break...
>
> We are looking at modeling some microcontrollers on the POWER
> chips. There is an OCC power management controller which is a 405
> and some other weird cut down 405 derivatives, we're not up to
> those yet but we want to model them.
>
> We should be able to remove a bunch of boards and CPUs, I just
> haven't started looking, so might be easier to wait for a bit.
> If it's not causing others too much problem, could we leave this
> in for the time being?

Sure. We will need a new SoC for the OCC and a firmware image. I think
these can be built from https://github.com/open-power/occ or, if not,
they should be made available.

Thanks,

C.