xref: /src/sys/rump/net/lib/libshmif/shmifvar.h

/*	$NetBSD: shmifvar.h,v 1.2 2010/08/12 18:17:23 pooka Exp $	*/

/*-
 * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
 *
 * Development of this software was supported by The Nokia Foundation.
 *
 * 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 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 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.
 */

#ifndef _RUMP_NET_SHMIFVAR_H_
#define _RUMP_NET_SHMIFVAR_H_

#define SHMIF_MAGIC 0xca11d054
#define SHMIF_VERSION 1

struct shmif_mem {
	uint32_t shm_magic;
	uint32_t shm_version;

	uint32_t shm_gen;
	uint32_t shm_first;
	uint32_t shm_last;

	uint32_t shm_lock;
	uint32_t shm_spare[2];

	uint8_t shm_data[0];
};

#define IFMEM_DATA	(offsetof(struct shmif_mem, shm_data))
#define IFMEM_WAKEUP	(offsetof(struct shmif_mem, shm_version))
#define PKTLEN_SIZE 	(sizeof(uint32_t))

#endif