MV_INT_MASK1
reg = pci_dw_dbi_rd4(sc->dev, MV_INT_MASK1);
pci_dw_dbi_wr4(sc->dev, MV_INT_MASK1, reg);
pci_dw_dbi_wr4(sc->dev, MV_INT_MASK1, 0x0001FE00);