The back-to-bootrom support for Rockchip is equivalent to an (assembly) implementation of setjmp/longjmp (i.e. it saves the stack-pointer, link-register and callee-saved registers). Up until now, this had only been implemented for AArch32 (i.e. ARMv7 or older), which puts the new ARMv8 devices (which boot in AArch64 mode) at a slight disadvantage.
To allow use of the 'back-to-bootrom' feature on new devices (e.g. the RK3368), this commit adds an implementation for AArch64.
Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Tom Rini trini@konsulko.com
Changes in v4: None Changes in v3: None Changes in v2: None
arch/arm/mach-rockchip/save_boot_param.S | 37 ++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+)
Applied to u-boot-rockchip, thanks!