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
|
/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* 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.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
*/
#include <sys/types.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <vm/vm_device.h>
#define pr_trace(fmt, ...) kprintf("vm_device: " fmt, ##__VA_ARGS__)
#define pr_error(...) pr_trace(__VA_ARGS__)
const struct vm_pagerops dv_vnops;
/*
* Attach a cdev to a vm_object
*
* @major: Char device major
* @minor: Char device minor.
*/
struct vm_object *
dv_attach(devmajor_t major, dev_t dev, vm_prot_t prot)
{
int error;
struct cdevsw *cdevp;
struct vm_object *vmobj;
if ((cdevp = dev_get(major, dev)) == NULL) {
pr_error("bad attach (major=%d, dev=%d)\n", major, dev);
return NULL;
}
if (cdevp->mmap == NULL) {
pr_error("cdev lacks mmap() (major=%d, dev=%d)\n", major, dev);
return NULL;
}
error = vm_obj_init(&cdevp->vmobj, &dv_vnops, 1);
if (error != 0) {
return NULL;
}
vmobj = &cdevp->vmobj;
vmobj->prot = prot;
vmobj->data = cdevp;
vmobj->pgops = &dv_vnops;
return vmobj;
}
/* TODO */
const struct vm_pagerops dv_vnops = {
.get = NULL,
};
|
