Probably cache synchronization issue on SH7723

[Markus Pietrek <Markus.Pietrek@emtrion.de>]

Hello,

when starting bigger graphical applications they suddenly stop with a 
segmentation fault or a bus error. If I execute the application a second 
time, everything is fine. Applications that are linked to shared 
libraries are more likely to fail than statically linked applications.

Changing the cache from write-back to write-through fixes it. Maybe the 
instruction cache and the data cache are not synchronized correctly?

I didn't have this problem with the linux-2.6.29 vanilla kernel. 
2.6.32rc2 from 
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 introduced 
it. And after a pull yesterday even /bin/init is failing.

On 9th Oct 2009, there was a similar bug report for the sh7785lcr. Does 
this platform now work?

Mit freundlichen Grüßen / Best Regards

Markus Pietrek
Software engineer

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emtrion GmbH
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