xref: /freebsd-11.0-release/usr.sbin/bhyve/uart_emul.h

/*-
 * Copyright (c) 2013 Neel Natu <neel@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: releng/11.0/usr.sbin/bhyve/uart_emul.h 257293 2013-10-29 00:18:11Z neel $
 */

#ifndef _UART_EMUL_H_
#define	_UART_EMUL_H_


#define	UART_IO_BAR_SIZE	8

struct uart_softc;

typedef void (*uart_intr_func_t)(void *arg);
struct uart_softc *uart_init(uart_intr_func_t intr_assert,
		uart_intr_func_t intr_deassert, void *arg);

int	uart_legacy_alloc(int unit, int *ioaddr, int *irq);
uint8_t	uart_read(struct uart_softc *sc, int offset);
void	uart_write(struct uart_softc *sc, int offset, uint8_t value);
int	uart_set_backend(struct uart_softc *sc, const char *opt);
#endif