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
--- a/arch/powerpc/cpu/mpc85xx/start.S
+++ b/arch/powerpc/cpu/mpc85xx/start.S
@@ -1145,8 +1145,9 @@
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 @@
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