From: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Date: Fri, 20 Nov 2009 00:21:04 +0000 (+0000)
Subject: powerpc/8xx: Tag DAR with 0x00f0 to catch buggy instructions.
X-Git-Tag: v2.6.33-rc1~293^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=60e071fee994ff98c37d03a4a7c5a3f8b1e3b8e5;p=pandora-kernel.git

powerpc/8xx: Tag DAR with 0x00f0 to catch buggy instructions.

dcbz, dcbf, dcbi, dcbst and icbi do not set DAR when they
cause a DTLB Error. Dectect this by tagging DAR with 0x00f0
at every exception exit that modifies DAR.
Test for DAR=0x00f0 in DataTLBError and bail
to handle_page_fault().

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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