From: shawn.guo@linaro.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: imx6: fix v7_invalidate_l1 by adding I-Cache invalidation
Date: Fri, 30 Dec 2011 17:26:40 +0800 [thread overview]
Message-ID: <1325237200-10610-1-git-send-email-shawn.guo@linaro.org> (raw)
The recent suspend/resume and reset testing on imx6q discovers that
not only D-Cache but also I-Cache has random data and validity when
the core comes out of a power recycle.
This patch adds I-Cache invalidation into v7_invalidate_l1 to make
sure both D-Cache and I-Cache invalidated on power-up.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
arch/arm/mach-imx/head-v7.S | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-imx/head-v7.S b/arch/arm/mach-imx/head-v7.S
index 6229efb..c844112 100644
--- a/arch/arm/mach-imx/head-v7.S
+++ b/arch/arm/mach-imx/head-v7.S
@@ -33,6 +33,7 @@
*/
ENTRY(v7_invalidate_l1)
mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
mcr p15, 2, r0, c0, c0, 0
mrc p15, 1, r0, c0, c0, 0
--
1.7.4.1
next reply other threads:[~2011-12-30 9:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-30 9:26 Shawn Guo [this message]
2011-12-30 10:47 ` [PATCH] ARM: imx6: fix v7_invalidate_l1 by adding I-Cache invalidation Jason Liu
2011-12-31 9:21 ` Shawn Guo
2012-01-03 17:41 ` Russell King - ARM Linux
2012-01-03 17:28 ` Russell King - ARM Linux
2012-01-03 17:58 ` Catalin Marinas
2012-01-05 6:37 ` [PATCH] ARM: proc-v7: remove harvard cache stuff Shawn Guo
2012-01-05 6:42 ` Kyungmin Park
2012-01-05 9:48 ` Catalin Marinas
2012-01-17 14:18 ` Will Deacon
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