powerpc: e6500: Lock/unlock 1 cache instead of L1 as init_ram

For E6500 cores, L2 cache has been used as init_ram. L1 cache is a
write through cache on E6500.If lines are not locked in both L1 and
L2 caches, crashes are observed during secure boot. This patch locks/
unlocks both L1 and L2 cache to prevent the crash.

Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S
index eb817f1..63fdffd 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/start.S
+++ b/arch/powerpc/cpu/mpc85xx/start.S
@@ -1145,8 +1145,9 @@ switch_as:
        li      r0,0
 1:
        dcbz    r0,r3
-#ifdef CONFIG_E6500    /* Lock/unlock L2 cache instead of L1 */
+#ifdef CONFIG_E6500    /* Lock/unlock L2 cache long with L1 */
        dcbtls  2, r0, r3
+       dcbtls  0, r0, r3
 #else
        dcbtls  0, r0, r3
 #endif
@@ -1790,8 +1791,9 @@ unlock_ram_in_cache:
        slwi    r4,r4,(10 - 1 - L1_CACHE_SHIFT)
        mtctr   r4
 1:     dcbi    r0,r3
-#ifdef CONFIG_E6500    /* lock/unlock L2 cache instead of L1 */
+#ifdef CONFIG_E6500    /* lock/unlock L2 cache long with L1 */
        dcblc   2, r0, r3
+       dcblc   0, r0, r3
 #else
        dcblc   r0,r3
 #endif