Save boot arguments x[0-3] into an array for handover of bloblist from previous boot stage.

Signed-off-by: Raymond Mao raymond.mao@linaro.org --- Changes in v2 - New patch file created for v2. Changes in V5 - Drop the dependence on OF_BOARD. Changes in V7 - Exclude the saved_args when BLOBLIST is disabled.

arch/arm/cpu/armv8/start.S | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 6cc1d26e5e..2a26b1c276 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -370,5 +370,21 @@ ENTRY(c_runtime_cpu_setup) ENDPROC(c_runtime_cpu_setup)

WEAK(save_boot_params) +#if (IS_ENABLED(CONFIG_BLOBLIST)) + adr x9, saved_args + stp x0, x1, [x9] + /* Increment the address by 16 bytes for the next pair of values */ + stp x2, x3, [x9, #16] +#endif b save_boot_params_ret /* back to my caller */ ENDPROC(save_boot_params) + +#if (IS_ENABLED(CONFIG_BLOBLIST)) +.section .data +.global saved_args +saved_args: + .rept 4 + .xword 0 + .endr +END(saved_args) +#endif