67 typedef void xencons_early_init_t(struct xencons_priv *cons);
70 typedef int xencons_read_t(struct xencons_priv *cons, char *buffer,
72 typedef int xencons_write_t(struct xencons_priv *cons, const char *buffer,
202 static inline void xencons_lock(struct xencons_priv *cons)  in xencons_lock()  argument
206 		mtx_lock_spin(&cons->mtx);  in xencons_lock()
210 static inline void xencons_unlock(struct xencons_priv *cons)  in xencons_unlock()  argument
214 		mtx_unlock_spin(&cons->mtx);  in xencons_unlock()
217 #define xencons_lock_assert(cons)	mtx_assert(&(cons)->mtx, MA_OWNED)  argument
221 xencons_early_init_hypervisor(struct xencons_priv *cons)  in xencons_early_init_hypervisor()  argument
233 	struct xencons_priv *cons;  in xencons_init_hypervisor()  local
236 	cons = tty_softc(tp);  in xencons_init_hypervisor()
239 	    intr_handler, tp, INTR_TYPE_TTY | INTR_MPSAFE, &cons->intr_handle);  in xencons_init_hypervisor()
247 xencons_write_hypervisor(struct xencons_priv *cons, const char *buffer,  in xencons_write_hypervisor()  argument
257 xencons_read_hypervisor(struct xencons_priv *cons, char *buffer,  in xencons_read_hypervisor()  argument
261 	xencons_lock_assert(cons);  in xencons_read_hypervisor()
275 xencons_early_init_ring(struct xencons_priv *cons)  in xencons_early_init_ring()  argument
277 	cons->intf = pmap_mapdev_attr(ptoa(xen_get_console_mfn()), PAGE_SIZE,  in xencons_early_init_ring()
279 	cons->evtchn = xen_get_console_evtchn();  in xencons_early_init_ring()
285 	struct xencons_priv *cons;  in xencons_init_ring()  local
288 	cons = tty_softc(tp);  in xencons_init_ring()
290 	if (cons->evtchn == 0)  in xencons_init_ring()
293 	err = xen_intr_bind_local_port(dev, cons->evtchn, NULL,  in xencons_init_ring()
294 	    intr_handler, tp, INTR_TYPE_TTY | INTR_MPSAFE, &cons->intr_handle);  in xencons_init_ring()
302 xencons_notify_ring(struct xencons_priv *cons)  in xencons_notify_ring()  argument
309 	if (__predict_true(cons->intr_handle != NULL))  in xencons_notify_ring()
310 		xen_intr_signal(cons->intr_handle);  in xencons_notify_ring()
313 			.port = cons->evtchn  in xencons_notify_ring()
321 xencons_write_ring(struct xencons_priv *cons, const char *buffer,  in xencons_write_ring()  argument
328 	intf = cons->intf;  in xencons_write_ring()
330 	xencons_lock_assert(cons);  in xencons_write_ring()
348 	xencons_notify_ring(cons);  in xencons_write_ring()
354 xencons_read_ring(struct xencons_priv *cons, char *buffer, unsigned int size)  in xencons_read_ring()  argument
360 	intf = cons->intf;  in xencons_read_ring()
362 	xencons_lock_assert(cons);  in xencons_read_ring()
379 		xencons_notify_ring(cons);  in xencons_read_ring()
417 xencons_rx(struct xencons_priv *cons)  in xencons_rx()  argument
422 	xencons_lock(cons);  in xencons_rx()
423 	while ((sz = cons->ops->read(cons, buf, sizeof(buf))) > 0) {  in xencons_rx()
427 			cons->rbuf[RBUF_MASK(cons->rp++)] = buf[i];  in xencons_rx()
429 	xencons_unlock(cons);  in xencons_rx()
434 xencons_tx_full(struct xencons_priv *cons)  in xencons_tx_full()  argument
438 	xencons_lock(cons);  in xencons_tx_full()
439 	used = cons->wp - cons->wc;  in xencons_tx_full()
440 	xencons_unlock(cons);  in xencons_tx_full()
446 xencons_tx_flush(struct xencons_priv *cons, int force)  in xencons_tx_flush()  argument
450 	xencons_lock(cons);  in xencons_tx_flush()
451 	while (cons->wc != cons->wp) {  in xencons_tx_flush()
453 		sz = cons->wp - cons->wc;  in xencons_tx_flush()
454 		if (sz > (WBUF_SIZE - WBUF_MASK(cons->wc)))  in xencons_tx_flush()
455 			sz = WBUF_SIZE - WBUF_MASK(cons->wc);  in xencons_tx_flush()
456 		sent = cons->ops->write(cons, &cons->wbuf[WBUF_MASK(cons->wc)],  in xencons_tx_flush()
473 		cons->wc += sent;  in xencons_tx_flush()
475 	xencons_unlock(cons);  in xencons_tx_flush()
479 xencons_putc(struct xencons_priv *cons, int c, bool force_flush)  in xencons_putc()  argument
482 	xencons_lock(cons);  in xencons_putc()
483 	if ((cons->wp - cons->wc) < WBUF_SIZE)  in xencons_putc()
484 		cons->wbuf[WBUF_MASK(cons->wp++)] = c;  in xencons_putc()
485 	xencons_unlock(cons);  in xencons_putc()
487 	xencons_tx_flush(cons, force_flush);  in xencons_putc()
489 	return (xencons_tx_full(cons));  in xencons_putc()
493 xencons_getc(struct xencons_priv *cons)  in xencons_getc()  argument
497 	xencons_lock(cons);  in xencons_getc()
498 	if (cons->rp != cons->rc) {  in xencons_getc()
500 		ret = (int)cons->rbuf[RBUF_MASK(cons->rc)];  in xencons_getc()
501 		cons->rc++;  in xencons_getc()
506 	xencons_unlock(cons);  in xencons_getc()
516 	struct xencons_priv *cons;  in xencons_tx()  local
518 	cons = tty_softc(tp);  in xencons_tx()
526 	if (xencons_tx_full(cons))  in xencons_tx()
531 		cons_full = xencons_putc(cons, c, false);  in xencons_tx()
540 	struct xencons_priv *cons;  in xencons_intr()  local
544 	cons = tty_softc(tp);  in xencons_intr()
555 	if (!cons->opened)  in xencons_intr()
558 	xencons_rx(cons);  in xencons_intr()
561 	while ((ret = xencons_getc(cons)) != -1) {  in xencons_intr()
563 		kdb_alt_break(ret, &cons->altbrk);  in xencons_intr()
571 	xencons_tx_flush(cons, 0);  in xencons_intr()
648 	struct xencons_priv *cons;  in xencons_tty_open()  local
650 	cons = tty_softc(tp);  in xencons_tty_open()
652 	cons->opened = true;  in xencons_tty_open()
660 	struct xencons_priv *cons;  in xencons_tty_close()  local
662 	cons = tty_softc(tp);  in xencons_tty_close()
664 	cons->opened = false;  in xencons_tty_close()
671 	struct xencons_priv *cons;  in xencons_timeout()  local
674 	cons = tty_softc(tp);  in xencons_timeout()
677 		callout_reset(&cons->callout, XC_POLLTIME,  in xencons_timeout()
684 	struct xencons_priv *cons;  in xencons_tty_outwakeup()  local
686 	cons = tty_softc(tp);  in xencons_tty_outwakeup()
688 	callout_stop(&cons->callout);  in xencons_tty_outwakeup()
691 		callout_reset(&cons->callout, XC_POLLTIME,  in xencons_tty_outwakeup()
730 	struct xencons_priv *cons;  in xencons_attach()  local
733 	cons = &main_cons;  in xencons_attach()
735 	tp = tty_alloc(&xencons_ttydevsw, cons);  in xencons_attach()
739 	callout_init_mtx(&cons->callout, tty_getlock(tp), 0);  in xencons_attach()
741 	err = cons->ops->init(dev, tp, xencons_intr);  in xencons_attach()
759 	struct xencons_priv *cons;  in xencons_resume()  local
764 	cons = tty_softc(tp);  in xencons_resume()
765 	xen_intr_unbind(&cons->intr_handle);  in xencons_resume()
767 	err = cons->ops->init(dev, tp, xencons_intr);  in xencons_resume()