[U-Boot] [PATCH 1/5] arm1176/cpu: Match cache_flush to arm1136

[Alexander Stein <alexanders83@web.de>]

This is effectively the same code but it also does a clean cache before
invalidating and doing a memory barrier.

Signed-off-by: Alexander Stein <alexanders83@web.de>
---
 arch/arm/cpu/arm1176/cpu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/arm/cpu/arm1176/cpu.c b/arch/arm/cpu/arm1176/cpu.c
index 2d81651..24b5cc7 100644
--- a/arch/arm/cpu/arm1176/cpu.c
+++ b/arch/arm/cpu/arm1176/cpu.c
@@ -41,11 +41,13 @@ int cleanup_before_linux (void)
 	return 0;
 }
 
-/* flush I/D-cache */
-static void cache_flush (void)
+static void cache_flush(void)
 {
+	unsigned long i = 0;
+	/* clean entire data cache */
+	asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (i));
 	/* invalidate both caches and flush btb */
-	asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (0));
+	asm volatile("mcr p15, 0, %0, c7, c7, 0" : : "r" (i));
 	/* mem barrier to sync things */
-	asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (0));
+	asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (i));
 }
-- 
2.4.5