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authorGregory CLEMENT <gregory.clement@free-electrons.com>2013-01-07 11:27:14 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-01-07 15:04:17 +0000
commit8b827c60a1d984ef8c3ed175c99a33dd451348ff (patch)
tree59aac11c91a9452a3985a261f4994cf4567a3f6e
parentd106de38ca927f2a53cd56ef94c506e8f6bd37e1 (diff)
downloadlinux-sh-8b827c60a1d984ef8c3ed175c99a33dd451348ff.tar.gz
ARM: 7615/1: cache-l2x0: aurora: Invalidate during clean operation with WT enable
This patch fixes a bug for Aurora L2 cache controller when the write-through mode is enable. For the clean operation even if we don't have to flush the lines we still need to invalidate them. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mm/cache-l2x0.c22
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 05d577613b13..55ca637a4930 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -506,15 +506,21 @@ static void aurora_clean_range(unsigned long start, unsigned long end)
static void aurora_flush_range(unsigned long start, unsigned long end)
{
- if (!l2_wt_override) {
- start &= ~(CACHE_LINE_SIZE - 1);
- end = ALIGN(end, CACHE_LINE_SIZE);
- while (start != end) {
- unsigned long range_end = calc_range_end(start, end);
+ start &= ~(CACHE_LINE_SIZE - 1);
+ end = ALIGN(end, CACHE_LINE_SIZE);
+ while (start != end) {
+ unsigned long range_end = calc_range_end(start, end);
+ /*
+ * If L2 is forced to WT, the L2 will always be clean and we
+ * just need to invalidate.
+ */
+ if (l2_wt_override)
aurora_pa_range(start, range_end - CACHE_LINE_SIZE,
- AURORA_FLUSH_RANGE_REG);
- start = range_end;
- }
+ AURORA_INVAL_RANGE_REG);
+ else
+ aurora_pa_range(start, range_end - CACHE_LINE_SIZE,
+ AURORA_FLUSH_RANGE_REG);
+ start = range_end;
}
}