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| author | York Sun <york.sun@nxp.com> | 2017-05-15 08:51:59 -0700 |
|---|---|---|
| committer | York Sun <york.sun@nxp.com> | 2017-06-01 19:57:24 -0700 |
| commit | 399e2bb60cb76131c49446baf350697142af7c07 (patch) | |
| tree | 5e13e5deea8e8d73302f4731e1ea1d6d42ef3236 /arch/arm/cpu/armv8/start.S | |
| parent | 1f55a93802ab1522e4f479d1d2730158e26b3567 (diff) | |
| download | u-boot-399e2bb60cb76131c49446baf350697142af7c07.tar.gz | |
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 <york.sun@nxp.com>
Diffstat (limited to 'arch/arm/cpu/armv8/start.S')
| -rw-r--r-- | arch/arm/cpu/armv8/start.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 354468b905..5c500be51d 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 */ |