3 commits

Author	SHA1	Message	Date
Bin Meng	10753ef8fd	riscv: Return to previous privilege level after trap handling ... 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 <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Anup Patel <anup@brainfault.org>	2018-12-18 09:56:27 +08:00
Bin Meng	496262cca6	riscv: Fix context restore before returning from trap handler ... sp cannot be loaded before restoring other registers. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Anup Patel <anup@brainfault.org>	2018-12-18 09:56:27 +08:00
Bin Meng	4b3f5ed5ac	riscv: Move trap handler codes to mtrap.S ... 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 <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Anup Patel <anup@brainfault.org>	2018-12-18 09:56:27 +08:00