vmm_ioport.c revision 263035 
1/*-
2 * Copyright (c) 2014 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
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 THE AUTHOR ``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 THE AUTHOR 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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/amd64/vmm/vmm_ioport.c 263035 2014-03-11 16:56:00Z tychon $");
29
30#include <sys/param.h>
31#include <sys/types.h>
32#include <sys/queue.h>
33#include <sys/cpuset.h>
34#include <sys/systm.h>
35
36#include <machine/vmm.h>
37
38#include "vatpic.h"
39#include "vmm_ioport.h"
40
41#define	MAX_IOPORTS		1280
42
43ioport_handler_func_t ioport_handler[MAX_IOPORTS] = {
44	[IO_ICU1] = vatpic_master_handler,
45	[IO_ICU1 + ICU_IMR_OFFSET] = vatpic_master_handler,
46	[IO_ICU2] = vatpic_slave_handler,
47	[IO_ICU2 + ICU_IMR_OFFSET] = vatpic_slave_handler,
48	[IO_ELCR1] = vatpic_elc_handler,
49	[IO_ELCR2] = vatpic_elc_handler,
50};
51
52int
53emulate_ioport(struct vm *vm, int vcpuid, struct vm_exit *vmexit)
54{
55	ioport_handler_func_t handler;
56
57	if (vmexit->u.inout.port >= MAX_IOPORTS)
58		return (-1);
59
60	handler = ioport_handler[vmexit->u.inout.port];
61	if (handler == NULL)
62		return (-1);
63
64	return ((*handler)(vm, vcpuid, vmexit));
65}
66