S_MC_WR_LIMIT
#define M_MC_WR_LIMIT _SB_MAKEMASK(4, S_MC_WR_LIMIT)
#define V_MC_WR_LIMIT(x) _SB_MAKEVALUE(x, S_MC_WR_LIMIT)
#define G_MC_WR_LIMIT(x) _SB_GETVALUE(x, S_MC_WR_LIMIT, M_MC_WR_LIMIT)