inout.h revision 257396 
1/*-
2 * Copyright (c) 2011 NetApp, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/usr.sbin/bhyve/inout.h 257396 2013-10-30 20:42:09Z neel $
27 */
28
29#ifndef _INOUT_H_
30#define	_INOUT_H_
31
32#include <sys/linker_set.h>
33
34struct vmctx;
35
36typedef int (*inout_func_t)(struct vmctx *ctx, int vcpu, int in, int port,
37			    int bytes, uint32_t *eax, void *arg);
38
39struct inout_port {
40	const char 	*name;
41	int		port;
42	int		size;
43	int		flags;
44	inout_func_t	handler;
45	void		*arg;
46};
47#define	IOPORT_F_IN		0x1
48#define	IOPORT_F_OUT		0x2
49#define	IOPORT_F_INOUT		(IOPORT_F_IN | IOPORT_F_OUT)
50
51/*
52 * The following flags are used internally and must not be used by
53 * device models.
54 */
55#define	IOPORT_F_DEFAULT	0x80000000	/* claimed by default handler */
56
57#define	INOUT_PORT(name, port, flags, handler)				\
58	static struct inout_port __CONCAT(__inout_port, __LINE__) = {	\
59		#name,							\
60		(port),							\
61		1,							\
62		(flags),						\
63		(handler),						\
64		0							\
65	};								\
66	DATA_SET(inout_port_set, __CONCAT(__inout_port, __LINE__))
67
68void	init_inout(void);
69int	emulate_inout(struct vmctx *, int vcpu, int in, int port, int bytes,
70		      uint32_t *eax, int strict);
71int	register_inout(struct inout_port *iop);
72int	unregister_inout(struct inout_port *iop);
73void	init_bvmcons(void);
74
75#endif	/* _INOUT_H_ */
76