RE: [linuxsh-dev] cache-sh4.c

[NIIBE Y. <gn...@m1...>]

Dustin McIntire wrote:
 > I've just tried Niibe-san's backport of the cache changes for the 2.4
 > kernel.  I'm running on a SH7751 based system, and I've run into some
 > trouble.  It seems I get a kernel oops (Segmentaton fault) in
 > __flush_cache_page when using the /bin/ps binary.  The oops goes away if I
 > simply force the CONFIG_CPU_SUBTYPE_SH7750 defines to true and use the 7750
 > cache method.  I'm still working to getting a better idea what is causing
 > the oops.

Thanks for the testing.  Umm... I've read the hardware manual of SH7750 and
SH7751.  I couldn't find the difference wrt the description of P2 requirement
of cache handling.  I'll test this with SH7751 SolutionEngine.

IIRC, Takashi Yoshii also has mentioned this.  I'm not sure if it's
future plan or actual implementation, though.

David, I'd like to confirm.  Is it OK for ST40STB1?
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