On Mon, Jul 22, 2019 at 2:00 AM Lukas Auer lukas.auer@aisec.fraunhofer.de wrote:
U-Boot SPL on the generic RISC-V CPU supports two boot flows, directly jumping to the image and via OpenSBI firmware. In the first case, both U-Boot SPL and proper must be compiled to run in the same privilege mode. Using OpenSBI firmware, U-Boot SPL must be compiled for machine mode and U-Boot proper for supervisor mode.
To be able to use SPL, boards have to provide a supported SPL boot device.
Signed-off-by: Lukas Auer lukas.auer@aisec.fraunhofer.de
arch/Kconfig | 6 +++ arch/riscv/Kconfig | 3 ++ arch/riscv/cpu/generic/Kconfig | 3 ++ arch/riscv/cpu/start.S | 23 +++++++++- arch/riscv/cpu/u-boot-spl.lds | 82 ++++++++++++++++++++++++++++++++++ arch/riscv/include/asm/spl.h | 31 +++++++++++++ arch/riscv/lib/Makefile | 1 + arch/riscv/lib/spl.c | 48 ++++++++++++++++++++ 8 files changed, 196 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/cpu/u-boot-spl.lds create mode 100644 arch/riscv/include/asm/spl.h create mode 100644 arch/riscv/lib/spl.c
Reviewed-by: Bin Meng bmeng.cn@gmail.com Tested-by: Bin Meng bmeng.cn@gmail.com