S_SMTW_OVLAN_IDX
#define V_SMTW_OVLAN_IDX(x) ((x) << S_SMTW_OVLAN_IDX)
#define G_SMTW_OVLAN_IDX(x) (((x) >> S_SMTW_OVLAN_IDX) & M_SMTW_OVLAN_IDX)