[PATCH] powerpc: rework 4xx PTE access and TLB miss

Josh Boyer jwboyer at linux.vnet.ibm.com
Tue Jul 8 11:25:23 EST 2008


On Tue, 08 Jul 2008 08:03:00 +1000
Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:

> On Mon, 2008-07-07 at 10:06 -0400, Josh Boyer wrote:
> 
> > The setup is an tftp'd kernel via U-Boot using cuImage, nfsroot
> > filesystem.  Sequoia has an FPU, and CONFIG_PPC_FPU is set.
> > 
> > I reverted this patch and used the latest powerpc-next branch and it
> > boots fine.
> > 
> > Seems something is wrong here still.  I suspect the DSI handler
> > changes, but I have no proof and haven't debugged it yet.  Until we
> > get it fixed, I don't feel overly comfortable putting it in the next
> > branch.  Which board and setup did you test with?
> 
> mambo and another board I don't remember which one precisely.

Unless you've seriously fixed mambo (which you probably have), I
wouldn't consider the 44x port to be useful as a true test platform.  I
started that support like 3 years ago, and I abandoned it when I was
1/2 way finished.  The exception precedence wasn't even right, and
userspace didn't start :)

> I'll have a look.

Cool, thanks.  If I get some time, I'll poke around myself too.

josh



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