Hi Raymond,
On Fri, Dec 22, 2023 at 9:31 PM Raymond Mao raymond.mao@linaro.org wrote:
Save boot arguments r[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 v3
- Swap value of r0 with r2.
arch/arm/cpu/armv7/start.S | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 69e281b086..2ca63ca32c 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -152,9 +152,22 @@ ENDPROC(c_runtime_cpu_setup)
*************************************************************************/ WEAK(save_boot_params) +#if (IS_ENABLED(CONFIG_OF_BOARD) && IS_ENABLED(CONFIG_BLOBLIST))
ldr r12, =saved_args/* Intentionally swapping r0 with r2 */stm r12, {r2, r1, r0, r3}
I thought the instruction was a bitmap, so what does the 'swapping' actually change?
+#endif b save_boot_params_ret @ back to my caller ENDPROC(save_boot_params)
+.section .data +.global saved_args +saved_args:
.rept 4.word 0.endr+END(saved_args)
#ifdef CONFIG_ARMV7_LPAE WEAK(switch_to_hypervisor) b switch_to_hypervisor_ret -- 2.25.1
Regards, Simon