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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>
This commit is contained in:
Gregory CLEMENT 2013-01-07 11:27:14 +01:00 committed by Russell King
parent d106de38ca
commit 8b827c60a1
1 changed files with 14 additions and 8 deletions
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22
arch/arm/mm/cache-l2x0.c
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@ -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;
}
}