From: Phil Edworthy <phil.edworthy@renesas.com>
Date: Mon, 9 Jan 2012 16:08:47 +0000 (+0000)
Subject: sh: sh2a: Improve cache flush/invalidate functions
X-Git-Tag: v3.3-rc1~91^2~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1537b4863da620f12f5b42ece61bf65314148ed;p=pandora-kernel.git

sh: sh2a: Improve cache flush/invalidate functions

The cache functions lock out interrupts for long periods; this patch
reduces the impact when operating on large address ranges. In such
cases it will:
- Invalidate the entire cache rather than individual addresses.
- Do nothing when flushing the operand cache in write-through mode.
- When flushing the operand cache in write-back mdoe, index the
  search for matching addresses on the cache entires instead of the
  addresses to flush

Note: sh2a__flush_purge_region was only invalidating the operand
cache, this adds flush.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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