diff options
| author | Joseph Lo <josephl@nvidia.com> | 2015-04-17 15:31:59 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-27 07:45:34 +0200 |
| commit | d8a5017ee0d47e860148d139bc5329083ac06515 (patch) | |
| tree | d7e60204a154442b8fc882d03765a6659209ea20 /src/arch/arm64/stage_entry.S | |
| parent | c38d3e8131b0f6ed7e576d1a66ac9513b1810f27 (diff) | |
arm64: save/restore cptr_el3 and cpacr_el1 registers
CPTR_EL3 and CPACR_EL1 are the registers for controlling the trap level
and access right of the FPU/SIMD instructions. Need to save/restore them
in every power cycle to keep the settings consistent.
BRANCH=none
BUG=none
TEST=boot on smaug/foster, verify the cpu_on/off is ok as well
Change-Id: I96fc0e0d2620e72b6ae2ffe4d073c9328047dc01
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 73e8cc8f25922e7bc218d24fbf4f7c67e15e3057
Original-Change-Id: I51eed07b1bb8f6eb2715622ec5d5c3f80c3c8bdd
Original-Signed-off-by: Joseph Lo <josephl@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/266073
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-on: http://review.coreboot.org/9981
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Diffstat (limited to 'src/arch/arm64/stage_entry.S')
| -rw-r--r-- | src/arch/arm64/stage_entry.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/arch/arm64/stage_entry.S b/src/arch/arm64/stage_entry.S index cfe8edd1fa..b7dc1b5b33 100644 --- a/src/arch/arm64/stage_entry.S +++ b/src/arch/arm64/stage_entry.S @@ -193,6 +193,12 @@ ENDPROC(__rmodule_entry) get_element_addr CNTFRQ_INDEX write_el0 cntfrq, x0, x1 + get_element_addr CPTR_INDEX + write_el3 cptr, x0, x1 + + get_element_addr CPACR_INDEX + write_el1 cpacr, x0, x1 + dsb sy isb |