2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004 Mark R V Murray
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
35 #include <sys/fcntl.h>
36 #include <sys/ioccom.h>
37 #include <sys/kernel.h>
39 #include <sys/malloc.h>
40 #include <sys/memrange.h>
41 #include <sys/module.h>
42 #include <sys/mutex.h>
45 #include <sys/signalvar.h>
46 #include <sys/systm.h>
50 #include <vm/vm_param.h>
52 #include <vm/vm_map.h>
53 #include <vm/vm_object.h>
54 #include <vm/vm_page.h>
55 #include <vm/vm_phys.h>
57 #include <machine/memdev.h>
59 static struct cdev *memdev, *kmemdev;
61 static d_ioctl_t memioctl;
63 static struct cdevsw mem_cdevsw = {
64 .d_version = D_VERSION,
76 memopen(struct cdev *dev __unused, int flags, int fmt __unused,
82 error = priv_check(td, PRIV_KMEM_READ);
85 error = priv_check(td, PRIV_KMEM_WRITE);
87 error = securelevel_gt(td->td_ucred, 0);
94 memioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags,
99 struct mem_extract *me;
104 case MEM_EXTRACT_PADDR:
105 me = (struct mem_extract *)data;
107 map = &td->td_proc->p_vmspace->vm_map;
108 vm_map_lock_read(map);
109 if (vm_map_lookup_entry(map, me->me_vaddr, &entry)) {
110 me->me_paddr = pmap_extract(
111 &td->td_proc->p_vmspace->vm_pmap, me->me_vaddr);
112 if (me->me_paddr != 0) {
113 me->me_state = ME_STATE_MAPPED;
114 me->me_domain = vm_phys_domain(me->me_paddr);
116 me->me_state = ME_STATE_VALID;
119 me->me_state = ME_STATE_INVALID;
121 vm_map_unlock_read(map);
124 error = memioctl_md(dev, cmd, data, flags, td);
132 mem_modevent(module_t mod __unused, int type, void *data __unused)
137 printf("mem: <memory>\n");
139 memdev = make_dev(&mem_cdevsw, CDEV_MINOR_MEM,
140 UID_ROOT, GID_KMEM, 0640, "mem");
141 kmemdev = make_dev(&mem_cdevsw, CDEV_MINOR_KMEM,
142 UID_ROOT, GID_KMEM, 0640, "kmem");
148 destroy_dev(kmemdev);
161 DEV_MODULE(mem, mem_modevent, NULL);
162 MODULE_VERSION(mem, 1);