From 399e2bb60cb76131c49446baf350697142af7c07 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 15 May 2017 08:51:59 -0700 Subject: armv8: layerscape: Make U-Boot EL2 safe When U-Boot boots from EL2, skip some lowlevel init code requiring EL3, including CCI-400/CCN-504, trust zone, GIC, etc. These initialization tasks are carried out before U-Boot runs. This applies to the RAM version image used for SPL boot if PPA is loaded first. Signed-off-by: York Sun --- arch/arm/cpu/armv8/start.S | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/arm/cpu/armv8/start.S') diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 354468b..5c500be 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -91,9 +91,12 @@ save_boot_params_ret: * this bit should be set for A53/A57/A72. */ #ifdef CONFIG_ARMV8_SET_SMPEN + switch_el x1, 3f, 1f, 1f +3: mrs x0, S3_1_c15_c2_1 /* cpuectlr_el1 */ orr x0, x0, #0x40 msr S3_1_c15_c2_1, x0 +1: #endif /* Apply ARM core specific erratas */ -- cgit v1.1