extern command_ret_t do_mem_cmp(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_mem_base(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_mem_loop(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_mem_cmp(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_mem_base(cmd_tbl_t *, int, int, char * const []);
extern command_ret_t do_mem_loop(cmd_tbl_t *, int, int, char * const []);