dmar_write8
dmar_write8(unit, iro + DMAR_IOTLB_REG_OFF, DMAR_IOTLB_IVT |
dmar_write8(unit, iro, base | am);
dmar_write8(unit, DMAR_IQT_REG, 0);
dmar_write8(unit, DMAR_IQA_REG, iqa);
dmar_write8(unit, DMAR_RTADDR_REG, VM_PAGE_TO_PHYS(root_entry));
dmar_write8(unit, DMAR_CCMD_REG, DMAR_CCMD_ICC | DMAR_CCMD_CIRG_GLOB);
dmar_write8(unit, reg + DMAR_IOTLB_REG_OFF, DMAR_IOTLB_IVT |
dmar_write8(unit, DMAR_IRTA_REG, irta);