vrtc.h

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2014 Neel Natu ([email protected])
 * 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 unmodified, 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 THE AUTHOR ``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 THE AUTHOR 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.
 */

#ifndef _VRTC_H_
#define	_VRTC_H_

#include <isa/isareg.h>

struct vrtc;
struct vm_snapshot_meta;

struct vrtc *vrtc_init(struct vm *vm);
void vrtc_cleanup(struct vrtc *vrtc);
void vrtc_reset(struct vrtc *vrtc);

time_t vrtc_get_time(struct vm *vm);
int vrtc_set_time(struct vm *vm, time_t secs);
int vrtc_nvram_write(struct vm *vm, int offset, uint8_t value);
int vrtc_nvram_read(struct vm *vm, int offset, uint8_t *retval);

int vrtc_addr_handler(struct vm *vm, bool in, int port, int bytes,
    uint32_t *val);
int vrtc_data_handler(struct vm *vm, bool in, int port, int bytes,
    uint32_t *val);

#ifdef BHYVE_SNAPSHOT
int vrtc_snapshot(struct vrtc *vrtc, struct vm_snapshot_meta *meta);
#endif

#endif