[Bug 205458] 11.0-CURRENT/10-STABLE powerpc64: a PowerMac G5 specific sys/powerpc/ofw/ofw_machdep.c change for reliable PowerMac G5 booting (with lots of RAM)

[Nathan Whitehorn]

On 09/14/16 00:57, Jukka A. Ukkonen wrote:
> On 09/13/16 20:28, Nathan Whitehorn wrote:
>> Maybe firmware needs SPRG1-3 restored? Any chance you could try deleting
>> the mtsprg1-3 one-by-one?
>> -Nathan
> But of course. It will take some time, though.
> Is there any particular order I should try them?
> 1, 2, and 3?
> I mean you and Mark obviously have a lot better
> understanding about ppc and what to expect when
> one touches sprg#. I will be flying pretty much
> blindfolded.
>
> --jau
>

I'm flying blind here too. It's one of SPRG1 or SPRG3 that I expect 
firmware needs restored on your system. SPRG2 is obliterated by the SLB 
fault handler, so if firmware needs it, we can't provide it anyway. And 
we know it doesn't need SPRG0 since Mark's patch works for you.
-Nathan