[PATCH 0/6] PowerPc 8xx TLB/MMU fixes

[Joakim Tjernlund]

Scott Wood <scottwood at freescale.com> wrote on 05/10/2009 20:12:34:

>
> On Mon, Oct 05, 2009 at 02:16:33PM +0200, Joakim Tjernlund wrote:
> > Here are my latest code to fixup 8xx's TLB code.
> > This code needs some serious testing before it
> > can be commited.
> > The "8xx, fault: Add some debug code to do_page_fault()" is
> > purely a debug check and will be removed/disabled when
> > this series appear stable.
> >
> > Scott and Rex, please disregard other patches from me and
> > try these out instead.
>
> I'm not sure which tree you based this on, but I got some conflicts
> in pte-8xx.h using Ben's merge branch.

It is a somewhat older tree, didn't think it would clash, sorry

>
> After resolving the conflict, without adding tlbil_va in do_page_fault(), I
> get the same stuck behavior as before.

Expected, I havn't not tried to fix the missing tlbil_va(). That is
different problem that you and Ben needs to sort out.

>  With tlbil_va, I get this (not sure
> if it's related to using the wrong base tree):

Could be the debug code doing something bad or the
"Fixup DAR from buggy dcbX instructions". Could you back that one out?
and if that does not help, backout:
"start using dcbX instructions in various copy routines" too.

>
> INIT: version 2.85 booting
> Mounting /proc and /sys
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   173 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   174 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   175 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   176 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   177 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   178 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   179 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   180 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   181 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 24:   182 Segmentation fault      /etc/rc.d/init.d/$i $mode
> dcbz: address:1, dar:30020000!
> /etc/rc.d/rcS: line 37:   183 Segmentation fault      /etc/rc.d/rc.local $mode
> INIT: Entering runlevel: 1
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> dcbz: address:1, dar:30020000!
> INIT: Id "l1" respawning too fast: disabled for 5 minutes
> INIT: no more processes left in this runlevel
>
> -Scott
>
>