HelenOS sources

XHCI_INTR_ERDP    189 uspace/drv/bus/usb/xhci/debug.c 	DUMP_REG(&hc->rt_regs->ir[0], XHCI_INTR_ERDP);
XHCI_INTR_ERDP    491 uspace/drv/bus/usb/xhci/hc.c 	XHCI_REG_WR(intr0, XHCI_INTR_ERDP, hc->event_ring.dequeue_ptr);
XHCI_INTR_ERDP    671 uspace/drv/bus/usb/xhci/hc.c 		XHCI_REG_WR(intr, XHCI_INTR_ERDP, hc->event_ring.dequeue_ptr);
XHCI_INTR_ERDP    678 uspace/drv/bus/usb/xhci/hc.c 	XHCI_REG_WR(intr, XHCI_INTR_ERDP, erdp);
HelenOS homepage, sources at GitHub