diff options
| author | Stephen Warren <swarren@nvidia.com> | 2016-07-18 17:01:50 -0600 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2016-07-21 09:31:30 -0700 |
| commit | 0e2b5350d9523c9b2dca57b98c89f031691d23e3 (patch) | |
| tree | 28c2fd3ebfab03eb4cefda1e8928d72325d930dd /arch/arm/cpu/armv8/start.S | |
| parent | efbb3d491e87935421242396958fdddd87e0fde1 (diff) | |
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 <swarren@nvidia.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch/arm/cpu/armv8/start.S')
| -rw-r--r-- | arch/arm/cpu/armv8/start.S | 9 |
1 files changed, 9 insertions, 0 deletions
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) |