In RISC-V, the M-mode runtime firmware provide SBI calls for
debug prints. This patch adds earlycon support using RISC-V
SBI console calls. To enable it, just pass "earlycon=sbi" in
kernel parameters.
Signed-off-by: NAnup Patel <anup@brainfault.org>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: NPalmer Dabbelt <palmer@sifive.com>
Signed-off-by: NPalmer Dabbelt <palmer@sifive.com>