Fir 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 as well as L2 cache to prevent the crash.
Signed-off-by: Ruchika Gupta <[email protected]> --- arch/powerpc/cpu/mpc85xx/start.S | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S index c3e1234..b9a4cb5 100644 --- 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 -- 1.9.1 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/listinfo/u-boot
