From: Chris Zankel <chris@zankel.net>
Date: Tue, 7 Aug 2007 06:57:57 +0000 (-0700)
Subject: [XTENSA] Add support for executable/non-executable feature in the mmu
X-Git-Tag: v2.6.23-rc7~43^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=01858d1b0b406307626bbc01238391b06aae2c20;p=pandora-kernel.git

[XTENSA] Add support for executable/non-executable feature in the mmu

Newer processor versions starting with Xtensa6/LX2 support an 'executable'
bit for memory pages. This bit replaces the 'valid' bit, so it must be
always set to one for older processor versions. To mark a page invalid, we now
set the cache-attributes to b11, which is backward compatible.

Signed-off-by: Chris Zankel <chris@zankel.net>
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