Fix ptrace and interrupt register overflow warning. Add missing P0 and P1 (r26 and r27) into register lists. These register are usually used in OS. Signed-off-by: Macpaul Lin <macpaul@gmail.com>
Add Makefile, board.c, interrupts.c and bootm.c functions to nds32 architecture. Signed-off-by: Macpaul Lin <macpaul@andestech.com>