BGE_PCI_CMD
command = pci_conf_read(sc->sc_pc, sc->sc_pcitag, BGE_PCI_CMD);
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, BGE_PCI_CMD);
pci_conf_write(sc->sc_pc, sc->sc_pcitag, BGE_PCI_CMD, command);