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
|
/*
* pdb_xen.c
*
* alex ho
* http://www.cl.cam.ac.uk/netos/pdb
*
* PDB interface library for accessing Xen
*/
#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
int
pdb_open ()
{
int xc_handle = xc_interface_open();
if ( xc_handle < 0 )
{
fprintf(stderr, "(pdb) error opening xc interface: %d (%s)\n",
errno, strerror(errno));
}
return xc_handle;
}
int
pdb_close (int xc_handle)
{
int rc;
if ( (rc = xc_interface_close(xc_handle)) < 0 )
{
fprintf(stderr, "(pdb) error closing xc interface: %d (%s)\n",
errno, strerror(errno));
}
return rc;
}
int
pdb_evtchn_bind_virq (int xc_handle, int virq, int *port)
{
int rc;
if ( (rc = xc_evtchn_bind_virq(xc_handle, virq, port) < 0 ) )
{
fprintf(stderr, "(pdb) error binding virq to event channel: %d (%s)\n",
errno, strerror(errno));
}
return rc;
}
#include <sys/ioctl.h>
/* /dev/xen/evtchn ioctls */
#define EVTCHN_RESET _IO('E', 1) /* clear & reinit buffer */
#define EVTCHN_BIND _IO('E', 2) /* bind to event channel */
#define EVTCHN_UNBIND _IO('E', 3) /* unbind from event channel */
int
xen_evtchn_bind (int evtchn_fd, int idx)
{
if ( ioctl(evtchn_fd, EVTCHN_BIND, idx) != 0 )
return -errno;
return 0;
}
int
xen_evtchn_unbind (int evtchn_fd, int idx)
{
if ( ioctl(evtchn_fd, EVTCHN_UNBIND, idx) != 0 )
return -errno;
return 0;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
|
