bcm63xx/u-boot/arch/riscv/cpu/mtrap.S, branch master

riscv: Return to previous privilege level after trap handling

2018-12-18T01:56:27Z

At present the trap handler returns to hardcoded M-mode/S-mode. Change to returning to previous privilege level instead. Signed-off-by: Bin Meng Reviewed-by: Lukas Auer Reviewed-by: Anup Patel

riscv: Fix context restore before returning from trap handler

2018-12-18T01:56:27Z

sp cannot be loaded before restoring other registers. Signed-off-by: Bin Meng Reviewed-by: Lukas Auer Reviewed-by: Anup Patel

riscv: Move trap handler codes to mtrap.S

2018-12-18T01:56:27Z

Currently the M-mode trap handler codes are in start.S. For future extension, move them to a separate file mtrap.S. Signed-off-by: Bin Meng Reviewed-by: Lukas Auer Reviewed-by: Anup Patel