From 0e2b5350d9523c9b2dca57b98c89f031691d23e3 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Mon, 18 Jul 2016 17:01:50 -0600 Subject: [PATCH] ARM: Add save_boot_params for ARMv8 Implement a hook to allow boards to save boot-time CPU state for later use. When U-Boot is chain-loaded by another bootloader, CPU registers may contain useful information such as system configuration information. This feature mirrors the equivalent ARMv7 feature. Signed-off-by: Stephen Warren Reviewed-by: Tom Rini Signed-off-by: Tom Warren --- arch/arm/cpu/armv8/start.S | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 67edf94520..19c771dba3 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -53,6 +53,11 @@ _bss_end_ofs: .quad __bss_end - _start reset: + /* Allow the board to save important registers */ + b save_boot_params +.globl save_boot_params_ret +save_boot_params_ret: + #ifdef CONFIG_SYS_RESET_SCTRL bl reset_sctrl #endif @@ -282,3 +287,7 @@ ENTRY(c_runtime_cpu_setup) ret ENDPROC(c_runtime_cpu_setup) + +WEAK(save_boot_params) + b save_boot_params_ret /* back to my caller */ +ENDPROC(save_boot_params) -- 2.39.5