From: David S. Miller <davem@sunset.davemloft.net>
Date: Wed, 1 Feb 2006 23:55:21 +0000 (-0800)
Subject: [SPARC64]: Access TSB with physical addresses when possible.
X-Git-Tag: v2.6.17-rc1~1184^2~206
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=517af33237ecfc3c8a93b335365fa61e741ceca4;p=pandora-kernel.git

[SPARC64]: Access TSB with physical addresses when possible.

This way we don't need to lock the TSB into the TLB.
The trick is that every TSB load/store is registered into
a special instruction patch section.  The default uses
virtual addresses, and the patch instructions use physical
address load/stores.

We can't do this on all chips because only cheetah+ and later
have the physical variant of the atomic quad load.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

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