shmifvar.h revision 1.9 
1/*	$NetBSD: shmifvar.h,v 1.9 2014/08/16 06:18:01 ozaki-r Exp $	*/
2
3/*-
4 * Copyright (c) 2009, 2010 Antti Kantee.  All Rights Reserved.
5 *
6 * Development of this software was supported by The Nokia Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef _RUMP_NET_SHMIFVAR_H_
31#define _RUMP_NET_SHMIFVAR_H_
32
33#define SHMIF_MAGIC 0xca11d054
34#define SHMIF_VERSION 3
35
36struct shmif_mem {
37	uint32_t shm_magic;
38	uint32_t shm_version;
39
40	uint64_t shm_gen;
41
42	uint32_t shm_first;
43	uint32_t shm_last;
44
45	uint32_t shm_lock;
46	uint32_t shm_spare[1];
47
48	uint8_t shm_data[0];
49};
50
51#define IFMEM_DATA	(offsetof(struct shmif_mem, shm_data))
52#define IFMEM_WAKEUP	(offsetof(struct shmif_mem, shm_version))
53
54struct shmif_pkthdr {
55	uint32_t sp_len;
56
57	uint32_t sp_sec;
58	uint32_t sp_usec;
59
60	uint64_t sp_sender;
61};
62
63#define BUSMEM_SIZE (1024*1024)
64#define BUSMEM_DATASIZE (BUSMEM_SIZE - sizeof(struct shmif_mem))
65
66#if 0
67#ifdef _KERNEL
68#include <rump/rumpuser.h>
69#define DPRINTF(x) rumpuser_dprintf x
70#else
71#define DPRINTF(x) printf x
72#endif
73#else
74#define DPRINTF(x)
75#endif
76
77uint32_t	shmif_advance(uint32_t, uint32_t);
78uint32_t	shmif_busread(struct shmif_mem *,
79			      void *, uint32_t, size_t, bool *);
80void		shmif_advancefirst(struct shmif_mem *, uint32_t, size_t);
81uint32_t	shmif_buswrite(struct shmif_mem *, uint32_t,
82			       void *, size_t, bool *);
83uint32_t	shmif_nextpktoff(struct shmif_mem *, uint32_t);
84
85#endif
86