Patches to allow usefdt mode that works on a 2 socket PowerMac3, 6 example too --and makes more work on 2-socket/1-core-each PowerMac11, 2

[Dennis Clarke]

On 4/12/19 3:19 PM, Mark Millard via freebsd-ppc wrote:
> With the following 2 patches for converting
> openfirmware to fdt content. . .
> 
> PowerMac11,2 example for usefdt mode:
> A) bge0 and bge1 are back in their historical places.
> B) powerd on the PowerMac11,2 works again.
> C) sysctl -a | grep cpufreq lists items for all the cpus
> D) probably more.
> 
> PowerMac3,6 example for usefdt mode:
> E) gem0 is present again and even works.
> F) Both CPUs are used again.
> F) probably more.
> (powerpd and cpufreq's are not operable/present even in
> non-usefdt mode.)
> 
> This message does not deal with other investigatory
> patches for other issues than converting openfirmware
> to fdt. But my test environment has all my investigatory
> patches in order to avoid other things getting in the
> way of my investigations.
> 
> The code comments are fairly explicit about
> what and why for the changes.
> 
> I treat the patches as investigatory, not ready
> in form for being official FreeBSD material. There
> are likely questions of if the change go in the
> right long-term direction --or even if old PowerMacs
> will continue to be viewed as worth supporting
> (because they compete with time spent on modern
> support).
> 
> I'll note that I've never had the 2-socket/1-core-each
> PowerMac7,2 get any visible behavior after the Kernel
> entry point message with any variation of usefdt mode.
> Failing so early, I've not figured out any way to
> investigate it hanging up. It does boot in non-usefdt
> mode with my other investigatory patches in place.
> 
> The openfirmware to fdt conversion patches are (white
> space details might not have been preserved in the
> message):
> 
.
.
.<awesome deep magic snippage>
.
.
> 
> ===
> Mark Millard

Would you be so kind as to paste all this into :

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233863

Really I would like to run some tests and follow up in the bug reports.


-- 
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional