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| author | Gregory CLEMENT <gregory.clement@free-electrons.com> | 2013-01-07 11:27:14 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-01-07 15:04:17 +0000 |
| commit | 8b827c60a1d984ef8c3ed175c99a33dd451348ff (patch) | |
| tree | 59aac11c91a9452a3985a261f4994cf4567a3f6e | |
| parent | d106de38ca927f2a53cd56ef94c506e8f6bd37e1 (diff) | |
| download | linux-8b827c60a1d984ef8c3ed175c99a33dd451348ff.tar.gz linux-8b827c60a1d984ef8c3ed175c99a33dd451348ff.tar.bz2 linux-8b827c60a1d984ef8c3ed175c99a33dd451348ff.zip | |
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.c | 22 |
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; } } |