UHCI_TD_ALIGN    1605 dev/usb/uhci.c 			  UHCI_TD_ALIGN, &dma);
UHCI_TD_ALIGN     107 dev/usb/uhcivar.h #define UHCI_STD_SIZE ((sizeof (struct uhci_soft_td) + UHCI_TD_ALIGN - 1) / UHCI_TD_ALIGN * UHCI_TD_ALIGN)