1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*-
* Copyright (c) 2011 NetApp, Inc.
* 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, 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 NETAPP, INC ``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 NETAPP, INC 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/select.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <stdbool.h>
#include "inout.h"
#include "pci_lpc.h"
#define BVM_CONSOLE_PORT 0x220
#define BVM_CONS_SIG ('b' << 8 | 'v')
static struct termios tio_orig, tio_new;
static void
ttyclose(void)
{
tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig);
}
static void
ttyopen(void)
{
tcgetattr(STDIN_FILENO, &tio_orig);
cfmakeraw(&tio_new);
tcsetattr(STDIN_FILENO, TCSANOW, &tio_new);
atexit(ttyclose);
}
static bool
tty_char_available(void)
{
fd_set rfds;
struct timeval tv;
FD_ZERO(&rfds);
FD_SET(STDIN_FILENO, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0) {
return (true);
} else {
return (false);
}
}
static int
ttyread(void)
{
char rb;
if (tty_char_available()) {
read(STDIN_FILENO, &rb, 1);
return (rb & 0xff);
} else {
return (-1);
}
}
static void
ttywrite(unsigned char wb)
{
(void) write(STDOUT_FILENO, &wb, 1);
}
static int
console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
uint32_t *eax, void *arg)
{
static int opened;
if (bytes == 2 && in) {
*eax = BVM_CONS_SIG;
return (0);
}
/*
* Guests might probe this port to look for old ISA devices
* using single-byte reads. Return 0xff for those.
*/
if (bytes == 1 && in) {
*eax = 0xff;
return (0);
}
if (bytes != 4)
return (-1);
if (!opened) {
ttyopen();
opened = 1;
}
if (in)
*eax = ttyread();
else
ttywrite(*eax);
return (0);
}
SYSRES_IO(BVM_CONSOLE_PORT, 4);
static struct inout_port consport = {
"bvmcons",
BVM_CONSOLE_PORT,
1,
IOPORT_F_INOUT,
console_handler
};
void
init_bvmcons(void)
{
register_inout(&consport);
}
|
