[PATCH] ARM: MMU: Fix memory reaching to the end of address space

[PATCH] ARM: MMU: Fix memory reaching to the end of address space

[Sascha Hauer]

For memory reaching the end of the address space
phys + bank->size overflows to 0. Fix this by right shifting
phys and bank->size before adding them.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/cpu/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index 84daa3d..bf0141b 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -200,7 +200,7 @@ static int arm_mmu_remap_sdram(struct memory_bank *bank)
 {
 	unsigned long phys = (unsigned long)bank->start;
 	unsigned long ttb_start = phys >> 20;
-	unsigned long ttb_end = (phys + bank->size) >> 20;
+	unsigned long ttb_end = (phys >> 20) + (bank->size >> 20);
 	unsigned long num_ptes = bank->size >> 10;
 	int i, pte;
 	u32 *ptes;
-- 
1.9.0


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox