Re: [PATCH 0/5] V7/Cortex/omap34xx fixes for 2.6.33-rc1: DCC, kexec, atags

[Mika Westerberg <mika.westerberg@iki.fi>]

On Tue, Dec 29, 2009 at 02:07:05PM -0800, Tony Lindgren wrote:
> Hi,
> 
> * Magnus Damm <magnus.damm@gmail.com> [091227 21:54]:
> > Hi Tony,
> > 
> > On Sat, Dec 19, 2009 at 12:45 PM, Tony Lindgren <tony@atomide.com> wrote:
> > > Here are some v7 fixes, mostly to make kexec work.
> > >
> > > Using 2.6.33-rc1, these fixes, and kexec from kexec-tools
> > > git repo, I can reboot my n900 in a loop reliably.
> > 
> > Thanks for your work on this. I previously tested kexec on ARM V6 and
> > V7 and noticed that V7 didn't work. I revisited my V7 test after
> > becoming aware of your patches. The single patch below unbreaks V7 on
> > my target system.
> > 
> > >      arm: Fix cpu_proc_fin() for proc-v7.S and make kexec work
> 
> Cool. Thank you for fixing the kexec source :)
> 
> Are you seeing the occasional crc errors when uncompressing the
> new kernel on your v7?
> 
> I'm seeing those maybe 1 out of 10 times on omap3430 boards unless if
> I do an extra (and wrong) flush_cache_all after local_flush_tlb_all
> at the end of setup_mm_for_reboot.

Hi,

I've also been playing with this patch.

One thing I noticed is that If I disable L2 cache in cpu_v7_proc_fin()
then kexec works fine and no crc errors from decompressor (I did
~30 kexec boots). With L2 cache enabled, it fails almost immediately.

Tested with OMAP3430 ES3.1.

Thanks,
MW
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