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[PATCH] MIPS: Avoid destructive invalidation on partial L2 cachelines

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH] MIPS: Avoid destructive invalidation on partial L2 cachelines
From: Kevin Cernekee <cernekee@gmail.com>
Date: Fri, 18 Sep 2009 19:12:45 -0700
Cc: <linux-mips@linux-mips.org>, <linux-kernel@vger.kernel.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: vim 7.1
This extends commit a8ca8b64e3fdfec17679cba0ca5ce6e3ffed092d to cover
the board cache code.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
---
 arch/mips/mm/sc-mips.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/mips/mm/sc-mips.c b/arch/mips/mm/sc-mips.c
index b55c2d1..5ab5fa8 100644
--- a/arch/mips/mm/sc-mips.c
+++ b/arch/mips/mm/sc-mips.c
@@ -32,6 +32,11 @@ static void mips_sc_wback_inv(unsigned long addr, unsigned 
long size)
  */
 static void mips_sc_inv(unsigned long addr, unsigned long size)
 {
+       unsigned long lsize = cpu_scache_line_size();
+       unsigned long almask = ~(lsize - 1);
+
+       cache_op(Hit_Writeback_Inv_SD, addr & almask);
+       cache_op(Hit_Writeback_Inv_SD, (addr + size - 1) & almask);
        blast_inv_scache_range(addr, addr + size);
 }
 
-- 
1.6.3.1


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