PORT_VLAN_MAP_FID_MASK
reg &= ~(PORT_MASK(sc) | PORT_VLAN_MAP_FID_MASK);
reg |= (fid << PORT_VLAN_MAP_FID) & PORT_VLAN_MAP_FID_MASK;
vg->es_fid = (reg & PORT_VLAN_MAP_FID_MASK) >> PORT_VLAN_MAP_FID;