XHCI_CRCR_HI
XOWRITE4(sc, XHCI_CRCR_HI, 0);
XOWRITE4(sc, XHCI_CRCR_HI, (uint32_t)(paddr >> 32));
XOREAD4(sc, XHCI_CRCR_HI), XOREAD4(sc, XHCI_CRCR_LO), paddr));
XOWRITE4(sc, XHCI_CRCR_HI, 0);
XOWRITE4(sc, XHCI_CRCR_HI, 0);