Re: [PATCH] Incorrect segment 0 initialization for PMAC G5

[Phileas Fogg <phileas-fogg%mail.ru@localhost>]

On 03/28/2013 11:34 AM, Michael wrote:
> Hello,
>
> > And i would appreciate any pointers regarding porting NetBSD to PowerMac
> > G5. I managed to get the display console working and
> > currently implementing support for U4 MPIC which is not supported by
> > NetBSD yet.
>
> Thanks for looking into this!
> I got my G5 ( dual core PCIe ) to display a few things and then hang
> hard when trying to turn on address translation. And that's where I got
> stuck - low level PowerPC MMU stuff isn't exactly my territory.
> I'm not sure if I committed all the code needed to get even that far
> ( dealing with different OF versions which encode memory configuration
> in slightly different ways and such ) - I'll check.
>
> have fun
> Michael

Hi,

i'm already past MMU initialization and the NetBSD kernel runs in
virtual mode on my G5. And i'm at the point now where cpu_configure is
called but then it drops to DDB because init_interrupt is not able
to find a PIC controller. U4 MPIC of my G5 is not yet supported
which i'm trying to fix currently.

I had some problems with MMU too at the beginning but after disabling
PMAP_NEED_MAPKERNEL in pmap_bootstrap, i got it running finally.
Do you know what is the purpouse of PMAP_NEED_MAPKERNEL ?

And i would appreciate any help i can get because i'm a bit new
to NetBSD kernel hacking.

regards